Pacific Premier Bancorp (PPBI) 10-K 26 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 19, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Entity File Number	0-22193
Entity Registrant Name	PACIFIC PREMIER BANCORP INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	33-0743196
Entity Address, Address Line One	17901 Von Karman Avenue
Entity Address, Address Line Two	Suite 1200
Entity Address, City or Town	Irvine
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92614
City Area Code	949
Local Phone Number	864-8000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	PPBI
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,000
Entity Common Stock, Shares Outstanding		94,293,626
Documents Incorporated by Reference	The information required by Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K will be found in the Company’s definitive proxy statement for its 2021 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended, and such information is incorporated herein by this reference.
Entity Central Index Key	0001028918
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 135,429	$ 135,847
Interest-bearing deposits with financial institutions	745,337	191,003
Cash and cash equivalents	880,766	326,850
Interest-bearing time deposits with financial institutions	2,845	2,708
Investments held-to-maturity, at amortized cost (fair value of 25,013 and 38,760 as of December 31, 2020 and December 31, 2019, respectively)	23,732	37,838
Investment securities available-for-sale, at fair value	3,931,115	1,368,384
FHLB, FRB, and other stock, at cost	117,055	93,061
Loans held for sale, at lower of cost or fair value	601	1,672
Loans held for investment	13,236,433	8,722,311
Allowance for credit losses	(268,018)	(35,698)
Loans held for investment, net	12,968,415	8,686,613
Accrued interest receivable	74,574	39,442
Other real estate owned	0	441
Premises and equipment	78,884	59,001
Deferred income taxes, net	89,056	0
Bank owned life insurance	292,564	113,376
Intangible assets	85,507	83,312
Goodwill	898,569	808,322
Other assets	292,861	154,992
Total assets	19,736,544	11,776,012
Deposit accounts:
Noninterest-bearing checking	6,011,106	3,857,660
Interest-bearing:
Checking	2,913,260	586,019
Money market/savings	5,662,969	3,406,988
Retail certificates of deposit	1,471,512	973,465
Wholesale/brokered certificates of deposit	155,330	74,377
Total interest-bearing	10,203,071	5,040,849
Total deposits	16,214,177	8,898,509
FHLB advances and other borrowings	31,000	517,026
Subordinated debentures	501,511	215,145
Deferred income taxes, net	0	1,371
Accrued expenses and other liabilities	243,207	131,367
Total liabilities	16,989,895	9,763,418
STOCKHOLDERS’ EQUITY
Preferred stock, $0.01 par value; 1,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value; 150,000,000 shares authorized at December 31, 2020 and December 31, 2019; 94,483,136 shares and 59,506,057 shares issued and outstanding, respectively	931	586
Additional paid-in capital	2,354,871	1,594,434
Retained earnings	330,555	396,051
Accumulated other comprehensive income	60,292	21,523
Total stockholders’ equity	2,746,649	2,012,594
Total liabilities and stockholders’ equity	$ 19,736,544	$ 11,776,012

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Investments held-to-maturity	$ 25,013	$ 38,760
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	94,483,136	59,506,057
Common stock, shares outstanding (in shares)	94,483,136	59,506,057

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
INTEREST INCOME
Loans	$ 577,558	$ 485,663	$ 415,410
Investment securities and other interest-earning assets	53,168	40,444	33,013
Total interest income	630,726	526,107	448,423
INTEREST EXPENSE
Deposits	34,336	58,297	37,653
FHLB advances and other borrowings	1,532	9,829	11,343
Subordinated debentures	20,647	10,680	6,716
Total interest expense	56,515	78,806	55,712
Net interest income before provision for credit losses	574,211	447,301	392,711
Provision for credit losses	191,816	5,719	8,253
Net interest income after provision for credit losses	382,395	441,582	384,458
NONINTEREST INCOME
Loan servicing income	2,028	1,840	1,445
Earnings on bank-owned life insurance	7,160	3,486	3,427
Net gain from sales of loans	8,609	6,642	10,759
Net gain from sales of investment securities	13,882	8,571	1,399
Other income	12,201	4,486	3,641
Total noninterest income	71,325	35,236	31,027
NONINTEREST EXPENSE
Compensation and benefits	180,452	139,187	129,886
Premises and occupancy	43,296	30,758	24,544
Data processing	20,491	12,301	13,412
Other real estate owned operations, net	1	160	4
FDIC insurance premiums	3,571	764	3,002
Legal and professional services	15,633	12,869	10,040
Marketing expense	5,891	6,402	6,151
Office expense	7,216	4,826	5,312
Loan expense	3,531	4,079	3,370
Deposit expense	19,700	15,266	9,916
Merger-related expense	49,129	656	18,454
Amortization of intangible assets	17,072	17,245	13,594
Other expense	15,136	14,552	12,220
Total noninterest expense	381,119	259,065	249,905
Net income before income taxes	72,601	217,753	165,580
Income tax expense	12,250	58,035	42,240
Net income	$ 60,351	$ 159,718	$ 123,340
EARNINGS PER SHARE
Basic (in dollars per share)	$ 0.75	$ 2.62	$ 2.29
Diluted (in dollars per share)	$ 0.75	$ 2.60	$ 2.26
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	79,209,560	60,339,714	53,963,047
Diluted (in shares)	79,506,274	60,692,281	54,613,057
Service charges on deposit accounts
NONINTEREST INCOME
Noninterest income	$ 6,712	$ 5,769	$ 5,128
Other service fee income
NONINTEREST INCOME
Noninterest income	1,554	1,438	902
Debit card interchange fee income
NONINTEREST INCOME
Noninterest income	2,526	3,004	4,326
Trust custodial account fees
NONINTEREST INCOME
Noninterest income	$ 16,653	$ 0	$ 0

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income		$ 60,351	$ 159,718	$ 123,340
Other comprehensive income, net of tax:
Unrealized holding gains/(losses) on securities arising during the period, net of income tax expense (benefits)	[1]	48,674	33,226	(5,019)
Reclassification adjustment for net gain on sale of securities included in net income, net of income taxes	[2]	(9,905)	(6,102)	(1,079)
Other comprehensive income (loss), net of tax		38,769	27,124	(6,098)
Comprehensive income, net of tax		$ 99,120	$ 186,842	$ 117,242
[1]	(1) Income tax expense (benefit) on unrealized holding gains (losses) on securities was $19.5 million for 2020, $13.4 million for 2019, and $(2.2) million for 2018.
[2]	(2) Income tax expense on reclassification adjustment for net gain on sale of securities included in net income was $4.0 million for 2020, $2.5 million for 2019, and $320,000 for 2018.

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Unrealized holding (losses) gains on securities arising during the period, net of income tax expense (benefit)	$ 19,500	$ 13,400	$ (2,200)
Reclassification adjustment for net gain on sale of securities included in net income, net of income tax	$ 4,000	$ 2,500	$ 320

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Impact of CECL Adoption	[1]	Common Stock	Additional  Paid-in Capital	Accumulated Retained Earnings	Accumulated Retained EarningsImpact of CECL Adoption	[1]	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2017		$ 1,241,996			$ 458	$ 1,063,974	$ 177,149			$ 415
Beginning balance (in shares) at Dec. 31, 2017					46,245,050
Increase (Decrease) in Stockholders' Equity
Net income		123,340					123,340
Other comprehensive income (loss)		(6,098)								(6,098)
Share-based compensation expense		9,033				9,033
Issuance of restricted stock, net		0
Issuance of restricted stock, net (in shares)					270,571
Issuance of common stock		601,171			$ 158	601,013
Issuance of common stock (in shares)					15,758,039
Restricted stock surrendered and canceled		(1,669)				(1,669)
Restricted stock surrendered and canceled (in shares)					(33,148)
Exercise of stock options, net		1,924			$ 1	1,923
Exercise of stock options, net (in shares)					240,243
Reclassification of certain tax effects of the Tax Cuts and Jobs Act		0					(82)			82
Ending balance at Dec. 31, 2018		1,969,697			$ 617	1,674,274	300,407			(5,601)
Ending balance (in shares) at Dec. 31, 2018					62,480,755
Increase (Decrease) in Stockholders' Equity
Net income		159,718					159,718
Other comprehensive income (loss)		27,124								27,124
Repurchase and retirement of common stock		(100,000)			$ (33)	(89,887)	(10,080)
Repurchase and retirement of common stock (in shares)					(3,364,761)
Cash dividends declared		(53,867)					(53,867)
Dividend equivalents declared		0				127	(127)
Share-based compensation expense		10,528				10,528
Issuance of restricted stock, net		0
Issuance of restricted stock, net (in shares)					316,754
Restricted stock surrendered and canceled		(3,285)				(3,285)
Restricted stock surrendered and canceled (in shares)					(139,569)
Exercise of stock options, net		$ 2,679			$ 2	2,677
Exercise of stock options, net (in shares)					212,878
Accounting standards update [Extensible List]	[1]	us-gaap:AccountingStandardsUpdate201613Member
Ending balance at Dec. 31, 2019		$ 2,012,594	$ (45,625)		$ 586	1,594,434	396,051	$ (45,625)		21,523
Ending balance (in shares) at Dec. 31, 2019		59,506,057			59,506,057
Increase (Decrease) in Stockholders' Equity
Net income		$ 60,351					60,351
Other comprehensive income (loss)		38,769								38,769
Cash dividends declared		(79,901)					(79,901)
Dividend equivalents declared		0				321	(321)
Share-based compensation expense		10,859				10,859
Issuance of restricted stock, net		0
Issuance of restricted stock, net (in shares)					563,330
Issuance of common stock - acquisition		749,603			$ 344	749,259
Issuance of common stock - acquisition (in shares)					34,407,403
Restricted stock surrendered and canceled		(1,653)				(1,653)
Restricted stock surrendered and canceled (in shares)					(116,439)
Exercise of stock options, net		1,652			$ 1	1,651
Exercise of stock options, net (in shares)					122,785
Ending balance at Dec. 31, 2020		$ 2,746,649			$ 931	$ 2,354,871	$ 330,555			$ 60,292
Ending balance (in shares) at Dec. 31, 2020		94,483,136			94,483,136
[1]	Related to the adoption of Accounting Standards Update 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . See Note 1 - Description of Business and Summary of Significant Accounting Policies.

CONSOLIDATED STATEMENTS OF ST_2

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 1.03	$ 0.88
Dividend equivalents declared (in dollars per share)	$ 1.03	$ 0.88

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 60,351	$ 159,718	$ 123,340
Adjustments to net income:
Depreciation and amortization expense	13,349	9,815	7,773
Provision for credit losses	191,816	5,719	8,253
Share-based compensation expense	10,859	10,528	9,033
Loss (gain) on sale and disposal of premises and equipment	255	(42)	108
Loss (gain) on sale of or write down of other real estate owned	112	(55)	(355)
Net amortization on securities	15,971	4,745	6,900
Net accretion of discounts/premiums for acquired loans and deferred loan fees/costs	(40,291)	(27,378)	(21,401)
Gain on sale of investment securities available-for-sale	(13,882)	(8,571)	(1,399)
Originations of loans held for sale	(14,251)	(98,232)	(147,740)
Proceeds from the sales of and principal payments from loans held for sale	16,552	111,952	184,220
Gain on sale of loans	(8,609)	(6,642)	(10,759)
Deferred income tax (benefit) expense	(42,622)	7,496	9,275
Change in accrued expenses and other liabilities, net	(9,455)	(6,265)	14,157
Income from bank owned life insurance, net	(5,538)	(2,689)	(2,774)
Amortization of intangible assets	17,072	17,245	13,594
Change in accrued interest receivable and other assets, net	20,609	5,346	4,266
Net cash provided by (used in) operating activities	212,298	182,690	196,491
Cash flows from investing activities:
Net increase in interest-bearing time deposits with financial institutions	0	3,435	490
Proceeds from sale of other real estate owned	534	405	1,058
Loan originations and payments, net	53,972	266,632	(340,023)
Proceeds from loans held for sale previously classified as portfolio loans	1,338,325	86,313	125,485
Purchase of loans held for investment	(66,470)	(222,701)	(61,562)
Purchase of held-to-maturity securities	0	0	(29,002)
Proceeds from prepayments and maturities of held-to-maturity securities	13,959	7,318	1,785
Purchase of securities available-for-sale	(2,715,499)	(889,516)	(462,534)
Proceeds from prepayments and maturities of securities available-for-sale	268,463	114,520	131,268
Proceeds from sale of securities available-for-sale	766,512	551,784	407,004
Proceeds from the sale of premises and equipment	42	14,751	0
Proceeds from bank-owned life insurance settlements	17,799	405	1,284
Purchases of premises and equipment	(11,408)	(18,834)	(10,295)
Change in FHLB, FRB, and other stock, at cost	(22,664)	2,306	(27,086)
Funding of CRA investments	(10,182)	(15,069)	(21,936)
Change in cash acquired in acquisitions, net	937,100	0	146,571
Net cash provided by (used in) investing activities	570,483	(98,251)	(137,493)
Cash flows from financing activities:
Net increase in deposit accounts	399,678	240,158	65,553
Net change in short-term borrowings	(691,000)	(115,075)	(108,064)
Repayment of long-term FHLB borrowings	(5,000)	(35,500)	(10,500)
Redemption of junior subordinated debt securities	0	(18,558)	0
Proceeds from issuance of subordinated debt, net	147,359	122,453	0
Cash dividends paid	(79,901)	(53,867)	0
Repurchase and retirement of common stock	0	(100,000)	0
Proceeds from exercise of stock options	1,652	2,679	1,924
Restricted stock surrendered and canceled	(1,653)	(3,285)	(1,669)
Net cash (used in) provided by financing activities	(228,865)	39,005	(52,756)
Net change in cash and cash equivalents	553,916	123,444	6,242
Cash and cash equivalents, beginning of year	326,850	203,406	197,164
Cash and cash equivalents, end of year	880,766	326,850	203,406
Supplemental cash flow disclosures:
Interest paid	57,020	79,386	53,960
Income taxes paid	36,158	52,093	32,296
Noncash investing activities:
Transfers from portfolio loans to loans held for sale	1,330,946	89,259	133,499
Transfers from loans to other real estate owned	208	644	15
Recognition of operating lease right-of-use assets	(12,277)	(52,701)	0
Recognition of operating lease liabilities	12,277	52,701	0
Assets acquired (liabilities assumed) in acquisitions (See Note 28):
Fair value of stock and equity award consideration	749,603	0	601,172
Cash consideration	2	0	980
Fair value of assets acquired	8,102,281	0	3,388,863
Liabilities assumed	$ 7,352,676	$ 0	$ 2,786,711

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Description of Business and Summary of Significant Accounting Policies	Description of Business and Summary of Significant Accounting Policies Description of Business. Pacific Premier Bancorp, Inc., a Delaware corporation organized in 1997 (the “Corporation”), is a California-based bank holding company that owns 100% of the capital stock of Pacific Premier Bank, a California-chartered commercial bank (the “Bank,” and together with the Corporation and its consolidated subsidiaries, the “Company”), the Corporation’s principal operating subsidiary. The Bank was incorporated and commenced operations in 1983. The principal business of the Company is attracting deposits from the general public and investing those deposits, together with funds generated from operations and borrowings, primarily in business loans and commercial real estate loans. At December 31, 2020, the Company had 65 full-service depository branches located in the western United States in major metropolitan markets in California, Washington, Oregon, Arizona, and Nevada. The Company also offers IRA custodial and maintenance services through its Pacific Premier Trust division, which serves as a custodian for self-directed IRAs, the funds of which account owners use for self-directed investments in various alternative asset classes. Additionally, the Company provides commercial escrow services through its Commerce Escrow division, which facilitates tax-deferred commercial exchanges under Section 1031 of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”). The Company is subject to the regulations of certain governmental agencies, and undergoes periodic examinations by those regulatory authorities. Principles of Consolidation. The Consolidated Financial Statements include the accounts of the Corporation and its wholly-owned subsidiary the Bank. The Company is organized and operates as a single reporting segment, principally engaged in the commercial banking business. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company consolidates voting entities in which the Company has control through voting interests or entities through which the Company has a controlling financial interest in a variable interest entity (“VIE”). The Company evaluates its interests in these entities to determine whether they meet the definition of a VIE and whether the Company is required to consolidate these entities. A VIE is consolidated by its primary beneficiary, which is the party that has both (i) the power to direct the activities that most significantly impact the economic performance of the VIE and (ii) a variable interest that could potentially be significant to the VIE. To determine whether or not a variable interest the Company holds could potentially be significant to the VIE, the Company considers both qualitative and quantitative factors regarding the nature, size and form of the Company's involvement with the VIE. See Note 16 - Variable Interest Entities for additional information. Effective June 1, 2020, the Corporation completed the acquisition of Opus Bank (“Opus”), a California-chartered state bank headquartered in Irvine, California, for a total consideration of approximately $749.6 million. At closing, Opus had $8.32 billion in total assets and operated 46 banking offices located throughout California, Washington, Oregon, and Arizona. See further discussion in Note 4 – Acquisitions . Basis of Financial Statement Presentation. The accompanying Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States (‘’GAAP’’). Certain amounts in the financial statements and related footnote disclosures for the prior years have been reclassified to conform to the current presentation with no impact to previously reported net income or stockholders’ equity. Use of Estimates. The preparation of Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates, and those estimates may change as new information is obtained. The following discussion provides a summary of the Company’s significant accounting policies: Cash and Cash Equivalents. Cash and cash equivalents include cash on hand, cash balances due from banks, and federal funds sold. Interest bearing deposits with financial institutions represent primarily cash held at the Federal Reserve Bank of San Francisco. The Board of Governors of the Federal Reserve System (“Federal Reserve”) has cash reserve requirements for depository institutions based on the amount of deposits held. At December 31, 2020, the Bank had no required balance by the Federal Reserve. The Company maintains amounts due from banks that exceed federally insured limits. The Company has not experienced any losses in such accounts. Securities. The Company has established written guidelines and objectives for its investing activities. At the time of purchase, management designates the security as either held-to-maturity, available-for-sale or held-for-trading based on the Company’s investment objectives, operational needs, and intent. The investments are monitored to ensure that those activities are consistent with the established guidelines and objectives. Securities Held-to-Maturity. Investments in debt securities that management has the positive intent and ability to hold to maturity are reported at cost and adjusted for periodic principal payments and the amortization of premiums and accretion of discounts, which are recognized in interest income using the interest method over the period of time remaining to investment’s maturity. Securities Available-for-Sale. Investments in debt securities that management has no immediate plan to sell, but which may be sold in the future, are carried at fair value. Premiums and discounts are amortized using the interest method over the remaining period to the call date for premiums or contractual maturity for discounts and, in the case of mortgage-backed securities, the estimated average life, which can fluctuate based on the anticipated prepayments on the underlying collateral of the securities. Unrealized holding gains and losses, net of tax, are recorded in a separate component of stockholders’ equity as accumulated other comprehensive income. Realized gains and losses on the sales of securities are determined using the specific identification method, recorded on a trade date basis based on the amortized cost basis of the specific security and are included in noninterest income as net gain (loss) on investment securities. Allowance for Credit Losses on Investment Securities. Effective January 1, 2020, the allowance for credit losses (“ACL”) on investment securities is determined for both the held-to-maturity and available-for-sale classifications of the investment portfolio in accordance with ASC 326. For available-for-sale investment securities, the Company performs a quarterly qualitative evaluation for securities in an unrealized loss position to determine if, for those investments in an unrealized loss position, the decline in fair value is credit related or non-credit related. In determining whether a security’s decline in fair value is credit related, the Company considers a number of factors including, but not limited to: (i) the extent to which the fair value of the investment is less than its amortized cost; (ii) the financial condition and near-term prospects of the issuer; (iii) downgrades in credit ratings; (iv) payment structure of the security, (v) the ability of the issuer of the security to make scheduled principal and interest payments, and (vi) general market conditions which reflect prospects for the economy as a whole, including interest rates and sector credit spreads. If it is determined that the unrealized loss, or a portion thereof, is credit related, the Company records the amount of credit loss through a charge to provision for credit losses in current period earnings. However, the amount of credit loss recorded in current period earnings is limited to the amount of the total unrealized loss on the security, which is measured as the amount by which the security’s fair value is below its amortized cost. If it is likely the Company will be required to sell the security in an unrealized loss position, the total amount of the loss is recognized in current period earnings. Unrealized losses deemed non-credit related are recorded, net of tax, through accumulated other comprehensive income. The Company determines expected credit losses on available-for-sale and held-to-maturity securities through a discounted cash flow approach, using the security’s effective interest rate. However, as previously mentioned, the measurement of credit losses on available-for-sale securities only occurs when, through the Company’s qualitative assessment, it is determined all or a portion of the unrealized loss is deemed to be credit related. The Company’s discounted cash flow approach incorporates assumptions about the collectability of future cash flows. The amount of credit loss is measured as the amount by which the security’s amortized cost exceeds the present value of expected future cash flows. Credit losses on available-for-sale securities are measured on an individual basis, while credit losses on held-to-maturity securities are measured on a collective basis according to shared risk characteristics. Credit losses on held-to-maturity securities are only recognized at the individual security level when the Company determines a security no longer possesses risk characteristics similar to others in the portfolio. The Company does not measure credit losses on an investment’s accrued interest receivable, but rather promptly reverses from current period earnings the amount of accrued interest that is no longer deemed collectable. Accrued interest receivable for investment securities is included in accrued interest receivable balances in the consolidated statements of financial condition. Federal Home Loan Bank Stock. The Bank is a member of the Federal Home Loan Bank (“FHLB”) System. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are recorded as a component of interest income. Federal Reserve Bank Stock. The Bank is a member of the Federal Reserve Bank of San Francisco (the “FRB”). FRB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are recorded as a component of interest income. Loans Held for Sale. Loans that the Company has the intent to sell prior to maturity have been designated as held for sale at origination or when the determination is made to sell the loan. Such loans are recorded at the lower of cost or fair value. Gains or losses are recognized upon the sale of the loans on a specific identification basis. Origination fees and costs are deferred until the time of sale and are included in the calculation of the gain or loss on the sale of the loan. Loan Servicing Assets. Servicing assets are related to SBA loans sold and are recognized at the time of sale when servicing is retained with the income statement effect recorded in gains on sales of SBA loans. Servicing assets are initially recorded at fair value based on the present value of the contractually specified servicing fee, net of estimated servicing costs, over the estimated life of the loan. The Company’s servicing costs approximates the industry average servicing costs of approximately 40 basis points. The servicing assets are subsequently amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. The Company periodically evaluates servicing assets for impairment based upon the fair value of the assets as compared to their carrying amount. The Company typically sells the guaranteed portion of SBA loans and retains the unguaranteed portion (“retained interest”). A portion of the premium on sale of SBA loans is recognized as gain on sale of loans at the time of the sale by allocating the carrying amount between the asset sold and the retained interest, based on their relative fair values. The remaining portion of the premium is recorded as a discount on the retained interest and is amortized over the remaining life of the loan as an adjustment to yield. The retained interest, net of any discount, are included in loans held for investment—net of allowance for credit losses in the accompanying consolidated statements of financial condition. Loans Held for Investment. Loans held for investment are loans the Company has the ability and intent to hold until their maturity. These loans are carried at amortized cost, net of discounts and premiums on acquired and purchased loans, and net deferred loan origination fees and costs. Purchase discounts and premiums and net deferred loan origination fees and costs on loans are accreted or amortized in interest income as an adjustment of yield, using the interest method, over the expected life of the loans. Amortization of deferred loan fees and costs are discontinued for loans placed on nonaccrual. Any remaining discounts, premiums, deferred fees or costs, and prepayment fees associated with loan payoffs prior to contractual maturity are included in loan interest income in the period of payoff. Loan commitment fees received to originate or purchase a loan are deferred and, if the commitment is exercised, recognized over the life of the loan using the interest method as an adjustment of yield or, if the commitment expires unexercised, recognized as income upon expiration of the commitment. The Company accrues interest on loans using the interest method and only if deemed collectible. Loans for which the accrual of interest has been discontinued are designated as nonaccrual loans. The accrual of interest on loans is discontinued when principal or interest is past due 90 days based on contractual terms of the loan or when, in the opinion of management, there is reasonable doubt as to the timely collection of principal and or interest. When loans are placed on nonaccrual status, all previously accrued and uncollected interest is promptly reversed against current period interest income, and as such an ACL for accrued interest receivable is not established. Interest income generally is not recognized on nonaccrual loans unless the likelihood of further loss is remote. Interest payments received on nonaccrual loans are applied as a reduction to the loan principal balance. Interest accruals are resumed on such loans only when they are brought current with respect to interest and principal and when, in the judgment of management, the loans are deemed to be fully collectible as to all principal and interest. Allowance for Credit Losses on Loans. Effective January 1, 2020, the Company accounts for credit losses on loans in accordance with ASC 326, which requires the Company to record an estimate of expected lifetime credit losses for loans at the time of origination or acquisition. The ACL is maintained at a level deemed appropriate by management to provide for expected credit losses in the portfolio as of the date of the consolidated statements of financial condition. Estimating expected credit losses requires management to use relevant forward-looking information, including the use of reasonable and supportable forecasts. The measurement of the ACL is performed by collectively evaluating loans with similar risk characteristics. The Company measures the ACL on commercial real estate loans and commercial loans using a discounted cash flow approach, and a historical loss rate methodology is used to determine the ACL on retail loans. The Company’s discounted cash flow methodology incorporates a probability of default and loss given default, as well as expectations of future economic conditions, using reasonable and supportable forecasts. Together, the probability of default and loss given default model with the use of reasonable and supportable forecasts generate estimates for cash flows expected to be collected over the estimated life of a loan. Estimates of future expected cash flows ultimately reflect assumptions made concerning net credit losses over the life of a loan. The use of reasonable and supportable forecasts requires significant judgment, such as selecting a forecast scenario, or the use of multiple forecast scenarios and the related scenario-weighting, as well as determining the appropriate length of the forecast horizon. Management leverages economic projections from a reputable and independent third party to inform and provide its reasonable and supportable economic forecasts. Other internal and external indicators of economic forecasts may also be considered by management when developing the forecast metrics. The Company’s ACL model reverts to long-term average loss rates for purposes of estimating expected cash flows beyond a period deemed reasonable and supportable. The Company forecasts economic conditions and expected credit losses over a two-year time horizon before reverting to long-term historical average loss rates over a period of three years. The duration of the forecast horizon, the period over which forecasts revert to long-term averages, the economic forecasts that management utilizes, as well as additional internal and external indicators of economic forecasts that management considers, may change over time depending on the nature and composition of our loan portfolio. Changes in economic forecasts, in conjunction with changes in loan specific attributes, impact a loan’s probability of default and loss given default, which can drive changes in the determination of the ACL. Expectations of future cash flows are discounted at the loan’s effective interest rate. The resulting ACL represents the amount by which the loan’s amortized cost exceeds the net present value of a loan’s discounted cash flows. The ACL is recorded through a charge to provision for credit losses and is reduced by charge-offs, net of recoveries on loans previously charged-off. It is the Company’s policy to promptly charge-off loan balances at the time they have been deemed uncollectable. The Company’s ACL model also includes adjustments for qualitative factors, where appropriate. Since historical information (such as historical net losses and economic cycles) may not always, by itself, provide a sufficient basis for determining future expected credit losses, the Company periodically considers the need for qualitative adjustments to the ACL. Qualitative adjustments may be related to and include, but not limited to factors such as: (i) management’s assessment of economic forecasts used in the model and how those forecasts align with management’s overall evaluation of current and expected economic conditions, (ii) organization specific risks such as credit concentrations, collateral specific risks, regulatory risks, and external factors that may ultimately impact credit quality, (iii) potential model limitations such as limitations identified through back-testing, and other limitations associated with factors such as underwriting changes, acquisition of new portfolios and changes in portfolio segmentation, and (iv) management’s overall assessment of the adequacy of the ACL, including an assessment of model data inputs used to determine the ACL. The Company has a credit portfolio review process designed to detect problem loans. Problem loans are typically those of a substandard or worse internal risk grade, and may consist of loans on nonaccrual status, troubled debt restructurings (“TDRs”), loans where the likelihood of foreclosure on underlying collateral has increased, collateral dependent loans and other loans where concern or doubt over the ultimate collectability of all contractual amounts due has become elevated. Such loans, which have exhibited a deterioration in credit quality may, in the opinion of management, be deemed to no longer possess risk characteristics similar to other loans in the loan portfolio, because the specific attributes and risks associated with the loan have likely become unique as the credit quality of the loan deteriorates. As such, these loans may require individual evaluation to determine an appropriate ACL for the loan. When a loan is individually evaluated, the Company typically measures the expected credit loss for the loan based on a discounted cash flow approach, unless the loan has been deemed collateral dependent. Collateral dependent loans are loans where the repayment of the loan is expected to come from the operation of and/or eventual liquidation of the underlying collateral. The ACL for collateral dependent loans is determined using estimates for the fair value of the underlying collateral, less costs to sell. Although management uses the best information available to derive estimates necessary to measure an appropriate level of ACL, future adjustments to the ACL may be necessary due to economic, operating, regulatory, and other conditions that may extend beyond the Company’s control. Additionally, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s ACL and credit review process. Such agencies may require the Company to recognize additions to the ACL based on judgments different from those of management. Please also see Note 5 - Allowance for Credit Losses , of these Consolidated Financial Statements for additional discussion concerning the Company’s ACL methodology. The Company has segmented the loan portfolio according to loans that share similar attributes and risk characteristics. Each segment possesses varying degrees of risk based on, among other things, the type of loan, the type of collateral, and the sensitivity of the borrower or industry to changes in external factors such as economic conditions. These segment groupings are: investor loans secured by real estate, business loans secured by real estate, commercial loans, and retail loans. Within each segment grouping there are various classes of loans as disclosed below. The Company determines the ACL for loans based on this more detailed loan segmentation and classification. At December 31, 2020, the Company had the following detailed segmentation on classes of loans: Investor Loans Secured by Real Estate: • Commercial real estate non-owner-occupied - Commercial real estate (“CRE”) non-owner-occupied includes loans for which the Company holds real property as collateral, but where the borrower does not occupy the underlying property. The primary risks associated with these loans include the borrower’s inability to pay, material decreases in the value of the real estate that is being held as collateral, significant increases in interest rates, which may make the real estate loan unprofitable to the borrower, changes in market rents, and vacancy of the underlying property. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. • Multifamily - Multifamily loans are secured by multi-unit (5 or more units) residential real properties. Payments on multifamily loans are dependent on the successful operation or management of the properties, and repayment of these loans may be subject to adverse conditions in the real estate market or the economy. • Construction and land - We originate loans for the construction of one-to-four family and multifamily residences and CRE properties in our primary market area. We concentrate our efforts on single homes and small infill projects in established neighborhoods where there is not abundant land available for development. Construction loans are considered to have higher risks due to construction completion and timing risk, and the ultimate repayment being sensitive to interest rate changes, government regulation of real property, and the availability of long-term financing. Additionally, economic conditions may impact the Company’s ability to recover its investment in construction loans, as adverse economic conditions may negatively impact the real estate market, which could affect the borrower’s ability to complete and sell the project. Additionally, the fair value of the underlying collateral may fluctuate as market conditions change. We occasionally originate land loans located predominantly in California for the purpose of facilitating the ultimate construction of a home or commercial building. The primary risks include the borrower’s inability to pay and the inability of the Company to recover its investment due to a decline in the fair value of the underlying collateral. Business Loans Secured by Real Estate: • Commercial real estate owner-occupied - CRE owner-occupied includes loans for which the Company holds real property as collateral and where the underlying property is occupied by the borrower, such as with a place of business. These loans are primarily underwritten based on the cash flows of the business and secondarily on the real estate. The primary risks associated with CRE owner-occupied loans include the borrower’s inability to pay, material decreases in the value of the real estate that is being held as collateral, and significant increases in interest rates, which may make the real estate loan unprofitable to the borrower. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. • Franchise secured by real estate - Franchise real estate secured loans are business loans secured by real property occupied by franchised restaurants, generally quick-service restaurants. These loans are primarily underwritten based on the cash flows of the business and secondarily on the real estate. Risks associated with these loans include material decreases in the value of real estate being held as collateral, and the borrower’s inability to pay as a result of increases in interest rates or decreases in cash flow from the underlying business. • Small Business Administration (“SBA”) - We are approved to originate loans under the SBA’s Preferred Lenders Program (“PLP”). The PLP lending status affords us a higher level of delegated credit autonomy, translating to a significantly shorter turnaround time from application to funding, which is critical to our marketing efforts. We originate loans nationwide under the SBA’s 7(a), SBAExpress, International Trade and 504(a) loan programs, in conformity with SBA underwriting and documentation standards. SBA loans are similar to commercial business loans, but have additional credit enhancement provided by the U.S. Small Business Administration, for up to 85% of the loan amount for loans up to $150,000 and 75% of the loan amount for loans of more than $150,000. The Company originates SBA loans with the intent to sell the guaranteed portion into the secondary market on a quarterly basis. Certain loans classified as SBA are secured by commercial real estate property. SBA loans secured by hotels are included in the segment investor loans secured by real estate, and SBA loans secured by all other forms of real estate are included in the business loans secured by real estate segment. All other SBA loans are included in the commercial loans segment below, and are secured by business assets. Commercial Loans: • Commercial and industrial (including franchise commercial loans) (“C&I”) - Loans secured by business assets including inventory, receivables, and machinery and equipment to businesses located generally in our primary market area. Loan types includes revolving lines or credit, term loans, seasonal loans, and loans secured by liquid collateral such as cash deposits or marketable securities. Franchise credit facilities not secured by real estate and Home Owners’ Association (“HOA”) credit facilities are included in C&I loans. We also issue letters of credit on behalf of our customers. Risk arises primarily due to the difference between expected and actual cash flows of the borrowers. In addition, the recoverability of the Company’s investment in these loans is also dependent on other factors primarily dictated by the type of collateral securing these loans. The fair value of the collateral securing these loans may fluctuate as market conditions change. In the case of loans secured by accounts receivable, the recovery of the Company’s investment is dependent upon the borrower’s ability to collect amounts due from its customers. • SBA Paycheck Protection Program (“PPP”) loans - Federally guaranteed loans designed to assist small and medium sized businesses through the disruptions in business brought on by the Coronavirus Disease 2019 (“COVID-19”) pandemic. The Paycheck Protection Program is part of the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act that was signed into law in March 2020. The loans are designed to help businesses meet the on-going costs associated with running and maintaining a business through the COVID-19 pandemic and provide the potential for forgiveness of the loan if the borrower uses the funds for certain purposes, such as maintaining employees on payroll for a specified period of time. Additionally, the PPP allows for a deferral period until the date when the amount of loan forgiveness is determined and remitted to the lender. For borrowers who do not apply for forgiveness, the loan deferral period is 10 months after the applicable forgiveness period ends. In July 2020, the Company sold its entire SBA PPP loan portfolio with an aggregate amortized cost of $1.13 billion to a seasoned and experienced non-bank lender and servicer of SBA loans, resulting in improved balance sheet liquidity and a gain on sale of approximately of $18.9 million, net of net deferred origination fees and purchase discounts. As of December 31, 2020, the Company had no SBA PPP loans. Retail Loans: • One-to-four family - Although we do not originate traditional single family mortgages, we have acquired first lien single family loans through bank acquisitions. We also originate home equity lines of credit loans to consumers within out market area. The primary risks of one-to-four family loans include the borrower’s inability to pay, material decreases in the value of the real estate that is being held as collateral and significant increases in interest rates, which may make loans unprofitable to the borrower. • Consumer loans - In addition to consumer loans acquired through our various bank acquisitions, we originate a limited number of consumer loans, generally for banking clients only, which consist primarily of home equity lines of credit, savings account secured loans and auto loans. Repayment of these loans is dependent on the borrower’s ability to pay and the fair value of the underlying collateral. Troubled Debt Restructurings. From time-to-time, the Company makes modifications to certain loans when a borrower is experiencing financial difficulty. These modifications are made to alleviate temporary impairments in the borrower’s financial condition and/or constraints on the borrower’s ability to repay the loan, and to minimize potential losses to the Company. Modifications typically include: changes in the amortization terms of the loan, reductions in interest rates, acceptance of interest only payments, and, in limited cases, reductions to the outstanding loan balance. Such loans are typically placed on nonaccrual status and are returned to accrual status when all contractual amounts past due have been brought current, the loan has performed under the modified terms of the loan agreement for a period of at least six months, and the ultimate collectability of all contractual amounts due under the modified terms of the loan agreement is no longer in doubt. The Company typically measures the ACL for TDRs on an individual basis when the loans are deemed to no longer share similar risk characteristics with other loans in the portfolio. The determination of the ACL for TDRs is based on a discounted cash flow approach for both those measured collectively and individually, unless the loan is deemed collateral dependent, which requires measurement of the

Regulatory Capital Requirements

Regulatory Capital Requirements and Other Regulatory Matters	12 Months Ended
	Dec. 31, 2020
Regulatory Capital Requirements under Banking Regulations [Abstract]
Regulatory Capital Requirements and Other Regulatory Matters	Regulatory Capital Requirements and Other Regulatory Matters The Corporation and the Bank are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the Corporation’s and the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Corporation and the Bank must meet specific capital guidelines that involve quantitative measures of the Corporation’s and the Bank’s assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The Corporation’s and the Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain capital in order to meet certain capital ratios to be considered adequately capitalized or well capitalized under the regulatory framework for prompt corrective action. As of the most recent formal notification from the Federal Reserve, the Bank was categorized as “well capitalized.” There are no conditions or events since that notification that management believes have changed the Bank’s categorization. Final comprehensive regulatory capital rules for U.S. banking organizations pursuant to the capital framework of the Basel Committee on Banking Supervision, generally referred to as “Basel III”, became effective for the Company and the Bank on January 1, 2015, subject to phase-in periods for certain of their components and other provisions. The most significant of the provisions of the Final Capital Rules, which applied to the Company and the Bank were as follows: the phase-out of trust preferred securities from Tier 1 capital issued by 2013, the higher risk-weighting of high volatility and past due real estate loans and the capital treatment of deferred tax assets and liabilities above certain thresholds. Beginning January 1, 2016, Basel III implemented a requirement for all banking organizations to maintain a capital conservation buffer above the minimum risk-based capital requirements in order to avoid certain limitations on capital distributions, stock repurchases and discretionary bonus payments to executive officers. The capital conservation buffer is exclusively comprised of Common Equity Tier capital, and it applies to each of the three risk-based capital ratios but not to the leverage ratio. The capital conservation buffer increased by 0.625% each year beginning on January 1, 2016, with additional 0.625% increments annually, until fully phased in at 2.50% by January 1, 2019. The net unrealized gain or loss on available-for-sale securities is not included in computing regulatory capital. At December 31, 2020, the Company and Bank are in compliance with the capital conservation buffer requirement and exceeded the minimum Common Equity Tier 1, Tier 1 and total capital ratio, inclusive of the fully phased-in capital conservation buffer, of 7.0%, 8.5% and 10.5%, respectively, and the Bank qualified as “well-capitalized” for purposes of the federal bank regulatory prompt corrective action regulations. In February 2019, the U.S. federal bank regulatory agencies approved a final rule modifying their regulatory capital rules and providing an option to phase-in over a three-year period the Day 1 adverse regulatory capital effects of CECL accounting standard. Additionally, in March 2020, the U.S. Federal bank regulatory agencies issued an interim final rule that provides banking organizations an option to delay the estimated CECL impact on regulatory capital for an additional two years for a total transition period of up to five years to provide regulatory relief to banking organizations to better focus on supporting lending to creditworthy households and businesses in light of recent strains on the U.S. economy as a result of the COVID-19 pandemic. The capital relief in the interim is calibrated to approximate the difference in allowances under CECL relative to the incurred loss methodology for the first two years of the transition period using a 25% scaling factor. The cumulative difference at the end of the second year of the transition period is then phased in to regulatory capital at 25% per year over a three-year transition period. The final rule was adopted and became effective in September 2020. As a result, entities may gradually phase in the full effect of CECL on regulatory capital over a five-year transition period. The Company implemented the CECL model commencing January 1, 2020 and elected to phase in the full effect of CECL on regulatory capital over the five-year transition period. For regulatory capital purposes, the Corporation’s trust preferred securities are included in Tier 2 capital at December 31, 2020. Provisions of the Dodd-Frank Act require that if a depository institution holding company exceeds $15 billion due to an acquisition, then trust preferred securities are to be excluded from Tier 1 capital beginning in the period in which the transaction occurred. The Corporation’s acquisition of Opus resulted in total consolidated assets exceeding $15 billion; accordingly, trust preferred securities are now excluded from the Corporation’s Tier 1 capital and included as Tier 2 capital. The Corporation and the Bank also have subordinated debt that qualifies as Tier 2 capital. See Note 14 - Subordinated Debentures for additional information. As defined in applicable regulations and set forth in the table below, the Corporation and the Bank continue to exceed the regulatory capital minimum requirements, and the Bank continues to exceed the “well capitalized” standards and the required conservation buffer at the dates indicated: Actual Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer Minimum Required For Well Capitalized Requirement Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2020 Pacific Premier Bancorp, Inc. Consolidated Tier 1 Leverage Ratio $ 1,811,280 9.47 % 764,968 4.00 % N/A N/A Common Equity Tier 1 Capital Ratio 1,811,280 12.04 % 1,053,063 7.00 % N/A N/A Tier 1 Capital Ratio 1,811,280 12.04 % 1,278,719 8.50 % N/A N/A Total Capital Ratio 2,454,055 16.31 % 1,579,594 10.50 % N/A N/A Pacific Premier Bank Tier 1 Leverage Ratio $ 2,081,916 10.89 % 764,863 4.00 % $ 956,079 5.00 % Common Equity Tier 1 Capital Ratio 2,081,916 13.84 % 1,053,177 7.00 % 977,950 6.50 % Tier 1 Capital Ratio 2,081,916 13.84 % 1,278,858 8.50 % 1,203,631 8.00 % Total Capital Ratio 2,390,954 15.89 % 1,579,766 10.50 % 1,504,539 10.00 % December 31, 2019 Pacific Premier Bancorp, Inc. Consolidated Tier 1 Leverage Ratio $ 1,123,740 10.54 % 426,597 4.00 % N/A N/A Common Equity Tier 1 Capital Ratio 1,116,185 11.35 % 688,508 7.00 % N/A N/A Tier 1 Capital Ratio 1,123,740 11.42 % 836,045 8.50 % N/A N/A Total Capital Ratio 1,357,904 13.81 % 1,032,762 10.50 % N/A N/A Pacific Premier Bank Tier 1 Leverage Ratio $ 1,321,494 12.39 % 426,592 4.00 % $ 533,240 5.00 % Common Equity Tier 1 Capital Ratio 1,321,494 13.43 % 688,650 7.00 % 639,461 6.50 % Tier 1 Capital Ratio 1,321,494 13.43 % 836,218 8.50 % 787,029 8.00 % Total Capital Ratio 1,360,471 13.83 % 1,032,975 10.50 % 983,786 10.00 %

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The amortized cost and estimated fair value of investment securities were as follows: December 31, 2020 Amortized Gross Unrealized Gross Unrealized Estimated (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury $ 30,153 $ 2,380 $ — $ 32,533 Agency 666,702 24,292 (608) 690,386 Corporate 412,223 3,591 (506) 415,308 Municipal bonds 1,412,012 37,260 (3,253) 1,446,019 Collateralized mortgage obligation 513,259 819 (712) 513,366 Mortgage-backed securities 812,384 21,662 (543) 833,503 Total investment securities available-for-sale 3,846,733 90,004 (5,622) 3,931,115 Investment securities held-to-maturity: Mortgage-backed securities 22,124 1,281 — 23,405 Other 1,608 — — 1,608 Total investment securities held-to-maturity 23,732 1,281 — 25,013 Total investment securities $ 3,870,465 $ 91,285 $ (5,622) $ 3,956,128 December 31, 2019 Amortized Gross Unrealized Gross Unrealized Estimated (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury $ 60,457 $ 3,137 $ (39) $ 63,555 Agency 240,348 7,686 (1,676) 246,358 Corporate 149,150 2,217 (14) 151,353 Municipal bonds 384,032 13,450 (184) 397,298 Collateralized mortgage obligation 9,869 123 (8) 9,984 Mortgage-backed securities 494,404 7,603 (2,171) 499,836 Total investment securities available-for-sale 1,338,260 34,216 (4,092) 1,368,384 Investment securities held-to-maturity: Mortgage-backed securities 36,114 922 — 37,036 Other 1,724 — — 1,724 Total investment securities held-to-maturity 37,838 922 — 38,760 Total investment securities $ 1,376,098 $ 35,138 $ (4,092) $ 1,407,144 Unrealized gains and losses on investment securities available-for-sale are recognized in stockholders’ equity as accumulated other comprehensive income or loss. At December 31, 2020, the Company had accumulated other comprehensive income of $84.4 million, or $60.3 million net of tax, compared to accumulated other comprehensive income of $30.1 million, or $21.5 million net of tax, at December 31, 2019. At December 31, 2020 and 2019, there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of shareholders’ equity. The Company reviews individual securities classified as available-for-sale to determine whether a decline in fair value below the amortized cost basis is deemed credit related or due to other factors such as changes in interest rates and general market conditions. The Company recognizes credit losses in current period earnings, through a change to provision for credit losses, when declines in the fair value of individual available-for-sale securities are below their amortized cost, and the decline in fair value is deemed to be credit related. Declines in fair value below amortized cost not deemed credit related are recorded net of tax in accumulated other comprehensive income. In the event the Company is required to sell or has the intent to sell an available-for-sale security that has experienced a decline in fair value below its amortized cost, the Company writes the amortized cost of the security down to fair value in the current period. During the second quarter of 2020, the Company acquired $829.9 million of available-for-sale securities in connection with the acquisition of Opus. Such securities were evaluated and it was determined that there were no investment securities classified as purchase credit deteriorated upon acquisition and, as a result, no allowance for credit losses was recorded. As of December 31, 2020 the Company has not recorded credit losses on certain available-for-sale securities that were in an unrealized loss position due to the high quality of the investments, with investment grade ratings, and many of them are issued by U.S. government agencies. Additionally, the Company continues to receive contractual principal and interest payments in a timely manner. The Company performed a qualitative assessment of these investments as of December 31, 2020, and does not believe the declines in fair value were credit related. There were no provision for credit losses recognized for investment securities during the year ended December 31, 2020. There were no other than temporary impairment losses recognized for investment securities for the years ended December 31, 2019 and 2018. At December 31, 2020, there were no available-for-sale or held-to-maturity securities in nonaccrual status. All securities in the portfolio were current with their contractual principal and interest payments. At December 31, 2020 and December 31, 2019, there were no securities purchased with deterioration in credit quality since their origination. At December 31, 2019, there were no collateral dependent available-for-sale or held-to-maturity securities. The table below shows the number, fair value, and gross unrealized holding losses of the Company’s investment securities by investment category and length of time that the securities have been in a continuous unrealized loss position. December 31, 2020 Less than 12 months 12 months or Longer Total Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Investment securities available-for-sale: Agency 4 $ 74,194 $ (307) 9 $ 10,434 $ (301) 13 $ 84,628 $ (608) Corporate 9 71,226 (506) — — — 9 71,226 (506) Municipal bonds 56 312,894 (3,253) — — — 56 312,894 (3,253) Collateralized mortgage obligation 21 215,603 (710) 1 431 (2) 22 216,034 (712) Mortgage-backed securities 16 139,071 (543) — — — 16 139,071 (543) Total investment securities available-for-sale 106 $ 812,988 $ (5,319) 10 $ 10,865 $ (303) 116 $ 823,853 $ (5,622) December 31, 2019 Less than 12 months 12 months or Longer Total Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury 1 $ 10,194 $ (39) — $ — $ — 1 $ 10,194 $ (39) Agency 13 102,874 (1,340) 9 13,514 (336) 22 116,388 (1,676) Corporate 1 1,017 (14) — — — 1 1,017 (14) Municipal bonds 12 30,541 (184) — — — 12 30,541 (184) Collateralized mortgage obligation — — — 1 603 (8) 1 603 (8) Mortgage-backed securities 18 130,014 (1,681) 11 26,886 (490) 29 156,900 (2,171) Total investment securities available-for-sale 45 $ 274,640 $ (3,258) 21 $ 41,003 $ (834) 66 $ 315,643 $ (4,092) The amortized cost and estimated fair value of investment securities available-for-sale at December 31, 2020, by contractual maturity, are shown in the table below. Due in One Year Due after One Year Due after Five Years Due after Total Amortized Fair Amortized Fair Amortized Fair Amortized Fair Amortized Fair (Dollars in thousands) Investment securities available-for-sale: Treasury $ — $ — $ 30,153 $ 32,533 $ — $ — $ — $ — $ 30,153 $ 32,533 Agency — — 357,471 365,530 216,904 227,338 92,327 97,518 666,702 690,386 Corporate 146,122 146,471 9,696 9,714 218,964 221,753 37,441 37,370 412,223 415,308 Municipal bonds 9,922 10,525 3,456 3,743 34,623 37,721 1,364,011 1,394,030 1,412,012 1,446,019 Collateralized mortgage obligation — — 14,938 14,869 219,553 219,509 278,768 278,988 513,259 513,366 Mortgage-backed securities — — 2,167 2,313 204,924 216,932 605,293 614,258 812,384 833,503 Total investment securities available-for-sale 156,044 156,996 417,881 428,702 894,968 923,253 2,377,840 2,422,164 3,846,733 3,931,115 Investment securities held-to-maturity: Mortgage-backed securities — — — — — — 22,124 23,405 22,124 23,405 Other — — — — — — 1,608 1,608 1,608 1,608 Total investment securities held-to-maturity — — — — — — 23,732 25,013 23,732 25,013 Total investment securities $ 156,044 $ 156,996 $ 417,881 $ 428,702 $ 894,968 $ 923,253 $ 2,401,572 $ 2,447,177 $ 3,870,465 $ 3,956,128 During the years ended December 31, 2020, 2019, and 2018, the Company recognized gross realized gains on sales of available-for-sale securities in the amounts of $15.7 million, $10.3 million, and $1.6 million, respectively. During the years ended December 31, 2020, 2019, and 2018, the Company recognized gross realized losses on sales of available-for-sale securities in the amounts of $1.8 million, $1.8 million, and $208,000, respectively. The Company had net proceeds from the sale of available-for-sale securities of $766.5 million, $551.8 million, and $407.0 million during the years ended December 31, 2020, 2019, and 2018, respectively. Investment securities with carrying values of $147.3 million and $125.7 million as of December 31, 2020 and 2019, respectively, were pledged to secure public deposits, other borrowings, and for other purposes as required or permitted by law. FHLB, FRB, and Other Stock The Company’s equity securities primarily consist of FHLB and FRB stock, which are considered restricted securities and held as a condition of membership of the FHLB and the Federal Reserve System. These equity securities without readily determinable fair values are carried at cost less impairment. At December 31, 2020, the Company had $17.3 million in FHLB stock, $74.4 million in Federal Reserve Bank of San Francisco (“FRB”) stock, and $25.4 million in other stock, all carried at cost. During the years ended December 31, 2020, 2019, and 2018, FHLB had repurchased $17.3 million, $18.3 million, and $24.9 million, respectively, of the Company’s excess FHLB stock through their stock repurchase program. The Company evaluates its investments in FHLB and other stock for impairment periodically, including their capital adequacy and overall financial condition. No impairment losses have been recorded through December 31, 2020. Allowance for Credit Losses on Investment Securities The Company accounts for credit losses on debt securities in accordance with ASC 326, which requires the Company to record an ACL on held-to-maturity investment securities at the time of purchase or acquisition. The ACL for held-to-maturity investment securities represents the Company’s current estimate of expected credit losses that may be incurred over the life of the investment. An ACL on available-for-sale investment securities is recorded when the fair value of the investment is below its amortized cost and the decline in fair value has been deemed to be credit related through the Company’s qualitative assessment. Non-credit related declines in fair value of available-for-sale investment securities are not recorded through an ACL, but rather recorded as an adjustment to accumulated other comprehensive income, net of tax. The Company determines credit losses on both available-for-sale investment securities through the use of a discounted cash flow approach using the security’s effective interest rate. The ACL is measured as the amount by which an investment security’s amortized cost exceeds the net present value of expected future cash flows. However, the amount of credit losses for available-for-sale investment securities is limited to the amount of a security’s unrealized loss. The ACL is established through a charge to provision for credit losses in current period earnings. The Company did not record an ACL for available-for-sale or held-to-maturity investment securities during the year ended December 31, 2020. For available-for-sale securities where estimated fair value was below amortized cost, such declines were deemed non-credit related and recorded as an adjustment to accumulated other comprehensive income, net of tax. Non-credit related decline in fair value of available-for-sale investment securities can be attributed to changes in interest rates and other market related factors. The Company did not record an ACL for held-to maturity securities during the year ended December 31, 2020, because the likelihood of non-repayment is remote. The following table summarizes the Company’s investment securities portfolio by Moody’s external rating equivalent and by vintage as of December 31, 2020: December 31, 2020 Vintage 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury Aaa - Aa3 $ — $ — $ 21,852 $ 10,681 $ — $ — $ 32,533 Agency Aaa - Aa3 359,428 60,943 157,942 9,733 20,711 81,629 690,386 Corporate debt A1 - A3 60,858 — — — 118,631 9,145 188,634 Baa1 - Baa3 99,999 69,638 5,034 17,936 5,449 28,618 226,674 Municipal bonds Aaa - Aa3 1,022,544 290,007 32,798 60,595 15,294 23,919 1,445,157 A1 - A3 — — — — — 862 862 Collateralized mortgage obligations Aaa - Aa3 241,971 107,104 29,890 15,305 105,641 13,455 513,366 Mortgage-backed securities Aaa - Aa3 424,825 112,447 32,901 144,513 39,975 78,842 833,503 Total investment securities available-for-sale 2,209,625 640,139 280,417 258,763 305,701 236,470 3,931,115 Investment securities held-to-maturity: Mortgage-backed securities Aaa - Aa3 — — 6,552 5,372 4,209 5,991 22,124 Other Baa1 - Baa3 — — 633 — — 975 1,608 Total investment securities held-to-maturity — — 7,185 5,372 4,209 6,966 23,732 Total investment securities $ 2,209,625 $ 640,139 $ 287,602 $ 264,135 $ 309,910 $ 243,436 $ 3,954,847

Loans

Loans	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Loans	Loans The company’s loan portfolio is segmented according to loans that share similar attributes and risk characteristics. Investor loans secured by real estate includes CRE non-owner-occupied, multifamily, construction, and land, as well as SBA loans secured by real estate, which are loans collateralized by hotel/motel real property. Business loans secured by real estate are loans to businesses that are collateralized by real estate where the operating cash flow of the business is the primary source of repayment. This loan portfolio includes CRE owner-occupied, franchise loans secured by real estate, and SBA loans secured by real estate, which are collateralized by real property other than hotel/motel real property. Commercial loans are loans to businesses where the operating cash flow of the business is the primary source of repayment. This loan portfolio includes commercial and industrial loans, franchise loans non-real estate secured, and SBA loans non-real estate secured. Retail loans portfolio includes single family residential and consumer loans. Single family residential loans include home equity lines of credit, as well as second trust deeds. The following table presents the composition of the loan portfolio as of the dates indicated: December 31, 2020 2019 (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 2,675,085 $ 2,070,141 Multifamily 5,171,356 1,575,726 Construction and land 321,993 438,786 SBA secured by real estate 57,331 68,431 Total investor loans secured by real estate 8,225,765 4,153,084 Business loans secured by real estate CRE owner-occupied 2,114,050 1,846,554 Franchise real estate secured 347,932 353,240 SBA secured by real estate 79,595 88,381 Total business loans secured by real estate 2,541,577 2,288,175 Commercial loans Commercial and industrial 1,768,834 1,393,270 Franchise non-real estate secured 444,797 564,357 SBA non-real estate secured 15,957 17,426 Total commercial loans 2,229,588 1,975,053 Retail loans Single family residential 232,574 255,024 Consumer 6,929 50,975 Total retail loans 239,503 305,999 Gross loans held for investment (1) 13,236,433 8,722,311 Allowance for credit losses for loans held for investment (2) (268,018) (35,698) Loans held for investment, net $ 12,968,415 $ 8,686,613 Loans held for sale, at lower of cost or fair value $ 601 $ 1,672 ______________________________ (1) Includes unaccreted fair value net purchase discounts of $113.8 million and $40.7 million as of December 31, 2020 and December 31, 2019 respectively. (2) The allowance for credit losses as of December 31, 2019 was accounted for under ASC 450 and ASC 310, which is reflective of probable incurred losses as of the balance sheet date. Effective January 1, 2020, the allowance for credit losses is accounted for under ASC 326, which is reflective of estimated expected lifetime credit losses. The Company originates SBA loans with the intent to sell the guaranteed portion of the loan prior to maturity and, therefore, designates them as held for sale. From time to time, the Company may purchase or sell other types of loans in order to manage concentrations, maximize interest income, change risk profiles, improve returns, and generate liquidity. The Company participated in the SBA PPP program under the CARES Act during the second quarter of 2020 and originated SBA PPP loans. At June 30, 2020, the Company’s SBA PPP loan balance was $1.13 billion. In July 2020, the Company concluded the sale of its entire SBA PPP loan portfolio with an aggregate amortized cost of $1.13 billion to a seasoned and experienced non-bank lender and servicer of SBA loans, resulting in improved balance sheet liquidity and a gain on sale of approximately of $18.9 million, net of net deferred origination fees and net purchase discounts. Loans Serviced for Others The Company generally retains the servicing rights of the guaranteed portion of SBA loans sold, for which the Company records a servicing asset at fair value within its other assets category. Servicing assets are subsequently measured using the amortization method and amortized to noninterest income. Servicing assets are evaluated for impairment based on the fair value of the assets as compared to carrying amount. At December 31, 2020 and 2019, the servicing asset totaled $5.3 million and $7.7 million, respectively, and was included in other assets on the Company’s consolidated statement of financial condition. Servicing rights are evaluated for impairment based upon the fair value of the rights as compared to the carrying amount. Impairment is recognized through a valuation allowance, to the extent the fair value is less than the carrying amount. The fair value of retained servicing rights is generally evaluated at the loan level using a discounted cash flow analysis utilizing current market assumptions derived from the secondary market. Key modeling assumptions include interest rates, prepayment assumptions, discount rate, and estimated cash flows. At December 31, 2020, and 2019, the Company determined that no valuation allowance was necessary. Opus entered into securitization sales on December 23, 2016 with the Federal Home Loan Mortgage Corporation (“Freddie Mac”). The transaction involved the sale of $509 million in originated multifamily loans through a Freddie Mac-sponsored transaction. One class of Freddie Mac guaranteed structured pass-through certificates was issued and purchased entirely by Opus. In connection with the Opus acquisition, the Company's continuing involvement includes sub-servicing responsibilities, general representations and warranties, and reimbursement obligations. Servicing responsibilities on loan sales generally include obligations to collect and remit payments of principal and interest, provide foreclosure services, manage payments of taxes and insurance premiums, and otherwise administer the underlying loans. In connection with the securitization transaction, Freddie Mac was designated as the master servicer and appointed the Company to perform sub-servicing responsibilities, which generally include the servicing responsibilities described above with the exception of the servicing of foreclosed or defaulted loans. The overall management, servicing, and resolution of defaulted loans and foreclosed loans are separately designated to the special servicer, a third-party institution that is independent of the master servicer and the Company. The master servicer has the right to terminate the Company in its role as sub-servicer and direct such responsibilities accordingly. General representations and warranties associated with loan sales and securitization sales require the Company to uphold various assertions that pertain to the underlying loans at the time of the transaction, including, but not limited to, compliance with relevant laws and regulations, absence of fraud, enforcement of liens, no environmental damages, and maintenance of relevant environmental insurance. Such representations and warranties are limited to those that do not meet the quality represented at the transaction date and do not pertain to a decline in value or future payment defaults. In circumstances where the Company breaches its representations and warranties, the Company would generally be required to cure such instances through a repurchase or substitution of the subject loan(s). To the extent the ultimate resolution of defaulted loans results in contractual principal and interest payments that are deficient, the Company is obligated to reimburse Freddie Mac for such amounts, not to exceed 10% of the original principal amount of the loans comprising the securitization pool at the closing date of December 23, 2016. The liability recorded for Company’s exposure to the reimbursement agreement with Freddie Mac was $448,000 as of December 31, 2020. Loans sold and serviced for others are not included in the accompanying consolidated statements of financial condition. The unpaid principal balance of loans and participations serviced for others were $686.0 million at December 31, 2020 and $633.8 million at December 31, 2019, including multifamily loans transferred through securitization with Freddie Mac of $99.4 million and SBA participations serviced for others totaling $421.7 million at December 31, 2020 and $475.3 million at December 31, 2019. Concentration of Credit Risk As of December 31, 2020, the Company’s loan portfolio was primarily collateralized by various forms of real estate and business assets located principally in California. The Company’s loan portfolio contains concentrations of credit in commercial non-owner occupied real estate, multifamily real estate, commercial owner occupied business loans and commercial and industrial business loans. The Company maintains policies approved by the Bank’s Board of Directors (the “Bank Board”) that address these concentrations and diversifies its loan portfolio through loan originations, purchases, and sales of loans to meet approved concentration levels. While management believes that the collateral presently securing these loans is adequate, there can be no assurances that significant deterioration in the California real estate market or economy would not expose the Company to significantly greater credit risk. Under applicable laws and regulations, the Bank may not make secured loans to one borrower in excess of 25% of the Bank’s unimpaired capital plus surplus and likewise in excess of 15% of the Bank’s unimpaired capital plus surplus for unsecured loans. These loans-to-one borrower limitations result in a dollar limitation of $821.3 million for secured loans and $492.8 million for unsecured loans at December 31, 2020. In order to manage concentration risk, the Bank maintains a house lending limit well below these statutory maximums. At December 31, 2020, the Bank’s largest aggregate outstanding balance of loans to one borrower was $165.4 million secured by multifamily properties. Credit Quality and Credit Risk The Company’s credit quality and credit risk is managed in two distinct areas. The first is the loan origination process, wherein the Bank underwrites credit and chooses which types and levels of risk it is willing to accept. The Company maintains a credit policy which addresses many related topics, sets forth maximum tolerances for key elements of loan risk, and indicates appropriate protocols for identifying and analyzing these risk elements. The policy sets forth specific guidelines for analyzing each of the loan products the Company offers from both an individual and portfolio-wide basis. The credit policy is reviewed annually by the Bank Board. The Bank’s underwriters ensure all key risk factors are analyzed with nearly all underwriting including a global cash flow analysis of the prospective borrowers. The second area is in the ongoing oversight of the loan portfolio, where existing credit risk is measured and monitored, and where performance issues are dealt with in a timely and appropriate fashion. Credit risk is monitored and managed within the loan portfolio by the Company’s portfolio managers based on both the credit policy and a credit and portfolio review policy. This latter policy requires a program of financial data collection and analysis, thorough loan reviews, property and/or business inspections, monitoring of portfolio concentrations and trends, and incorporation of current business and economic conditions. The portfolio managers also monitor asset-based lines of credit, loan covenants, and other conditions associated with the Company’s business loans as a means to help identify potential credit risk. Most individual loans, excluding the homogeneous loan portfolio, are reviewed at least annually, including the assignment or confirmation of a risk grade. Risk grades are based on a six-grade Pass scale, along with Special Mention, Substandard, Doubtful, and Loss classifications, as such classifications are defined by the federal banking regulatory agencies. The assignment of risk grades allows the Company to, among other things, identify the risk associated with each credit in the portfolio, and to provide a basis for measuring risk to determine the estimated valuation allowance for groups and individual assets at a point in time. Risk grades are reviewed regularly by the Company’s Credit and Portfolio Review committee, and the portfolio management and risk grading process is reviewed on an on-going basis by an independent loan review function, as well as by regulatory agencies during scheduled examinations. The following provides brief definitions for risk grades assigned to loans in the portfolio: • Pass classifications represent assets with an acceptable level of credit quality that contains no well-defined deficiencies or weaknesses. • Special Mention assets do not currently expose the Bank to a sufficient risk to warrant classification in one of the adverse categories, but possess correctable deficiencies or potential weaknesses deserving management’s close attention. • Substandard assets are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. These assets are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. OREO acquired through foreclosure are also classified as substandard assets. • Doubtful credits have all the weaknesses inherent in substandard credits, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. • Loss assets are those that are considered uncollectible and of such little value that their continuance as assets is not warranted. Amounts classified as loss are promptly charged off. The Bank’s portfolio managers also manage loan performance risks, collections, workouts, bankruptcies, and foreclosures. A special department, whose portfolio managers have professional expertise in these areas, typically handles or advises on these types of matters. Loan performance risks are mitigated by our portfolio managers acting promptly and assertively to address problem credits when they are identified. Collection efforts commence immediately upon non-payment, and the portfolio managers seek to promptly determine the appropriate steps to minimize the Company’s risk of loss. When foreclosure will maximize the Company’s recovery for a non-performing loan, the portfolio managers will take appropriate action to initiate the foreclosure process. When a loan is graded as special mention, substandard, or doubtful, the Company obtains an updated valuation of the underlying collateral. If, through the Company’s credit risk management process, it is determined the ultimate repayment of a loan will come from the foreclosure upon and ultimate sale of the underlying collateral, the loan is deemed collateral dependent and evaluated individually to determine an appropriate ACL for the loan. The ACL for such loans is measured as the amount by which the fair value of the underlying collateral, less estimated costs to sell, is less than the amortized cost of the loan. The Company typically continues to obtain or confirm updated valuations of underlying collateral for special mention and classified loans on an annual or biennial basis in order to have the most current indication of fair value of the underlying collateral securing the loan. Additionally, once a loan is identified as collateral dependent, due to the likelihood of foreclosure, and repayment of the loan is expected to come from the eventual sale of the underlying collateral, an analysis of the underlying collateral is performed at least quarterly. Changes in the estimated fair value of the collateral are reflected in the lifetime ACL for the loan. Balances deemed to be uncollectable are promptly charged-off. The following table stratifies the loans held for investment portfolio by the Company’s internal risk grading, and by year of origination, as of December 31, 2020: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total December 31, 2020 (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied Pass $ 265,901 $ 541,994 $ 440,351 $ 287,580 $ 279,238 $ 791,477 $ 11,114 $ — $ 2,617,655 Special mention — — 6,669 437 2,516 29,738 — — 39,360 Substandard — 9,732 2,045 — 516 5,218 559 — 18,070 Multifamily Pass 1,027,644 1,677,716 899,123 665,939 354,859 531,287 420 — 5,156,988 Special mention — 1,758 2,630 — 8,649 — — — 13,037 Substandard — — — 559 772 — — — 1,331 Construction and land Pass 57,309 144,759 73,313 18,625 20,531 6,672 784 — 321,993 SBA secured by real estate Pass — 8,306 9,029 13,418 6,305 7,696 — — 44,754 Special mention 496 1,032 1,159 1,000 373 306 — — 4,366 Substandard — 1,220 2,959 1,091 400 2,541 — — 8,211 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loans secured by real estate CRE owner-occupied Pass $ 293,324 $ 409,758 $ 332,672 $ 327,475 $ 225,098 $ 469,704 $ 14,268 $ 246 $ 2,072,545 Special mention 2,190 15,917 3,802 — 4,153 201 — — 26,263 Substandard — — 3,636 4,214 1,169 5,973 250 — 15,242 Franchise real estate secured Pass 44,413 81,438 66,241 96,999 24,673 27,020 — — 340,784 Special mention 878 1,650 2,652 — — — — — 5,180 Substandard — — — — 1,968 — — — 1,968 SBA secured by real estate Pass 3,253 7,637 12,608 16,058 8,488 23,624 — — 71,668 Special mention — — 1,200 — 137 — — — 1,337 Substandard — — 184 1,987 1,376 3,043 — — 6,590 Total loans secured by business real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 Commercial Loans Commercial and industrial Pass $ 127,082 $ 260,368 $ 159,001 $ 210,163 $ 51,800 $ 82,291 $ 801,752 $ 9,315 $ 1,701,772 Special mention 735 — 2,331 185 1,320 243 17,890 37 22,741 Substandard — 3,310 2,737 610 1,333 2,446 32,858 1,027 44,321 Franchise non-real estate secured Pass 27,607 164,025 94,494 46,174 40,829 27,745 1,361 502 402,737 Special mention — 7,267 2,037 230 480 2,321 — — 12,335 Substandard — 6,690 3,706 18,425 700 204 — — 29,725 SBA non-real estate secured Pass 407 2,257 1,558 2,674 610 4,449 — 259 12,214 Special mention — — — 1,574 — — — — 1,574 Substandard — 83 357 282 340 400 707 — 2,169 Total commercial loans $ 155,831 $ 444,000 $ 266,221 $ 280,317 $ 97,412 $ 120,099 $ 854,568 $ 11,140 $ 2,229,588 Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total December 31, 2020 (Dollars in thousands) Retail Loans Single family residential Pass $ 10,794 $ 7,714 $ 13,982 $ 14,039 $ 33,968 $ 124,248 $ 27,172 — $ 231,917 Substandard — — — — — 657 — — 657 Consumer loans Pass 52 112 37 25 2 3,145 3,508 — 6,881 Substandard — 7 — — — 41 — — 48 Total retail loans $ 10,846 $ 7,833 $ 14,019 $ 14,064 $ 33,970 $ 128,091 $ 30,680 $ — $ 239,503 Totals gross loans $ 1,862,085 $ 3,354,750 $ 2,140,513 $ 1,729,763 $ 1,072,603 $ 2,152,690 $ 912,643 $ 11,386 $ 13,236,433 The following table stratifies the loan portfolio by the Company’s internal risk rating as of December 31, 2019: Credit Risk Grades Pass Special Substandard Total Gross (Dollars in thousands) December 31, 2019 Investor loans secured by real estate CRE non-owner-occupied $ 2,067,875 $ 1,178 $ 1,088 $ 2,070,141 Multifamily 1,575,510 — 216 1,575,726 Construction and land 438,769 — 17 438,786 SBA secured by real estate 65,835 973 1,623 68,431 Total investor loans secured by real estate 4,147,989 2,151 2,944 4,153,084 Business loans secured by real estate CRE owner-occupied 1,831,853 11,167 3,534 1,846,554 Franchise real estate secured 352,319 921 — 353,240 SBA secured by real estate 83,106 1,842 3,433 88,381 Total business loans secured by real estate 2,267,278 13,930 6,967 2,288,175 Commercial loans Commercial and industrial 1,359,662 13,226 20,382 1,393,270 Franchise non-real estate secured 546,594 6,930 10,833 564,357 SBA not secured by real estate 13,933 485 3,008 17,426 Total commercial loans 1,920,189 20,641 34,223 1,975,053 Retail loans Single family residential 254,463 — 561 255,024 Consumer loans 50,921 — 54 50,975 Total retail loans 305,384 — 615 305,999 Total gross loans $ 8,640,840 $ 36,722 $ 44,749 $ 8,722,311 The following tables stratify loans held for investment by delinquencies in the Company’s loan portfolio as of the periods indicated: Days Past Due Current 30-59 60-89 90+ Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied $ 2,674,328 $ — $ — $ 757 $ 2,675,085 Multifamily 5,171,355 1 — — 5,171,356 Construction and land 321,993 — — — 321,993 SBA secured by real estate 56,074 — — 1,257 57,331 Total investor loans secured by real estate 8,223,750 1 — 2,014 8,225,765 Business loans secured by real estate CRE owner-occupied 2,108,746 — — 5,304 2,114,050 Franchise real estate secured 347,932 — — — 347,932 SBA secured by real estate 78,036 486 — 1,073 79,595 Total business loans secured by real estate 2,534,714 486 — 6,377 2,541,577 Commercial loans Commercial and industrial 1,765,451 428 57 2,898 1,768,834 Franchise non-real estate secured 444,797 — — — 444,797 SBA not secured by real estate 14,912 338 — 707 15,957 Total commercial loans 2,225,160 766 57 3,605 2,229,588 Retail loans Single family residential 232,559 15 — — 232,574 Consumer loans 6,928 1 — — 6,929 Total retail loans 239,487 16 — — 239,503 Totals $ 13,223,111 $ 1,269 $ 57 $ 11,996 $ 13,236,433 Days Past Due Current 30-59 60-89 90+ Total (Dollars in thousands) December 31, 2019 Investor loans secured by real estate CRE non-owner-occupied $ 2,067,874 $ 1,179 $ — $ 1,088 $ 2,070,141 Multifamily 1,575,726 — — — 1,575,726 Construction and land 438,786 — — — 438,786 SBA secured by real estate 68,041 — — 390 68,431 Total investor loans secured by real estate 4,150,427 1,179 — 1,478 4,153,084 Business loans secured by real estate CRE owner-occupied 1,846,223 331 — — 1,846,554 Franchise real estate secured 353,240 — — — 353,240 SBA secured by real estate 86,946 — 589 846 88,381 Total business loans secured by real estate 2,286,409 331 589 846 2,288,175 Commercial loans Commercial and industrial 1,389,026 422 826 2,996 1,393,270 Franchise non-real estate secured 555,215 — 9,142 — 564,357 SBA not secured by real estate 16,141 167 — 1,118 17,426 Total commercial loans 1,960,382 589 9,968 4,114 1,975,053 Retail loans Single family residential 255,024 — — — 255,024 Consumer loans 50,967 5 2 1 50,975 Total retail loans 305,991 5 2 1 305,999 Totals $ 8,703,209 $ 2,104 $ 10,559 $ 6,439 $ 8,722,311 Individually Evaluated Loans Beginning on January 1, 2020, the Company evaluates loans collectively for purposes of determining the ACL in accordance with ASC 326. Collective evaluation is based on aggregating loans deemed to possess similar risk characteristics. In certain instances the Company may identify loans that it believes no longer possess risk characteristics similar to other loans in the loan portfolio. These loans are typically identified from those that have exhibited deterioration in credit quality, since the specific attributes and risks associated with such loans tend to become unique as the credit deteriorates. Such loans are typically nonperforming, modified through a TDR, downgraded to substandard or worse, and/or are deemed collateral dependent, where the ultimate repayment of the loan is expected to come from the operation of or eventual sale of the collateral. Loans that are deemed by management to no longer possess risk characteristics similar to other loans in the portfolio, or that have been identified as collateral dependent, are evaluated individually for purposes of determining an appropriate lifetime ACL. The Company uses a discounted cash flow approach, using the loan’s effective interest rate, for determining the ACL on individually evaluated loans, unless the loan is deemed collateral dependent, which requires evaluation based on the estimated fair value of the underlying collateral, less estimated costs to sell. The Company may increase or decrease the ACL for collateral dependent loans based on changes in the estimated fair value of the collateral. Changes in the ACL for all other individually evaluated loans is based substantially on the Company’s evaluation of cash flows expected to be received from such loans. As of December 31, 2020, $29.2 million of loans were individually evaluated, and the ACL attributed to such loans was $126,000. At December 31, 2020, $15.2 million of individually evaluated loans were evaluated using a discounted cash flow approach and $14.0 million of individually evaluated loans were evaluated based on the underlying value of the collateral. The Company had individually evaluated loans on nonaccrual status of $29.2 million at December 31, 2020. Impaired Loans Prior to the adoption of ASC 326 on January 1, 2020, the Company classified loans as impaired when, based on current information and events, it was probable that the Company would be unable to collect all amounts due according to the contractual terms of the loan agreement or it was determined that the likelihood of the Company receiving all scheduled payments, including interest, when due was remote. Credit losses on impaired loans were determined separately based on the guidance in ASC 310. Beginning January 1, 2020, the Company accounts for credit losses on all loans in accordance with ASC 326, which eliminates the concept of an impaired loan within the context of determining credit losses, and requires all loans to be evaluated for credit losses collectively based on similar risk characteristics. Loans are only evaluated individually when they are deemed to no longer possess similar risk characteristics with other loans in the loan portfolio. Prior to the adoption of ASC 326, the Company reviewed loans for impairment when the loan was classified as substandard or worse, delinquent 90 days, determined by management to be collateral dependent, when the borrower filed for bankruptcy, or was granted a loan modification in a TDR. Measurement of impairment was based on the loan’s expected future cash flows discounted at the loan’s effective interest rate, measured by reference to an observable market value, if one existed, or the fair value of the collateral if the loan was deemed collateral dependent. Valuation allowances were determined on a loan-by-loan basis or by aggregating loans with similar risk characteristics. The following tables provide a summary of the Company’s investment in impaired loans as of and for the periods indicated: Impaired Loans Recorded Investment Unpaid Principal Balance With Specific Allowance Without Specific Allowance Specific Allowance for Impaired Loans Average Recorded Investment Interest Income Recognized (Dollars in thousands) December 31, 2019 Investor loans secured by real estate CRE non-owner occupied $ 1,088 $ 1,184 $ — $ 1,088 $ — $ 317 $ — Construction and land — — — — — 120 — SBA secured by real estate 390 772 — 390 — 1,002 — Business loans secured by real estate CRE owner-occupied — — — — — 777 — Franchise real estate secured — — — — — 1,887 — SBA secured by real estate 1,517 1,743 — 1,517 — 872 16 Commercial loans Commercial and industrial 7,529 7,755 — 7,529 — 10,251 385 Franchise non-real estate secured 10,834 10,835 — 10,834 — 1,192 151 SBA non-real estate secured 1,118 1,555 — 1,118 — 1,122 — Retail loans Single family residential 366 412 — 366 — 379 — Consumer — — — — — 19 — Totals $ 22,842 $ 24,256 $ — $ 22,842 $ — $ 17,938 $ 552 December 31, 2018 Investor loans secured by real estate CRE non-owner occupied $ — $ — $ — $ — $ — $ 538 $ — Multifamily — — — — — 500 — Construction and land — — — — — 5 — SBA secured by real estate 1,600 6,077 488 1,140 466 1,280 — Business loans secured by real estate CRE owner-occupied 599 628 — 599 — 1,565 — Commercial loans Commercial and industrial 8,523 8,571 550 7,973 118 1,782 36 Franchise non-real estate secured 190 190 — 190 — 119 — SBA non-real estate secured 1,110 1,521 — 1,110 — 534 — Retail loans Single family residential 408 453 — 408 — 1,206 — Consumer — — — — — 33 — Totals $ 12,430 $ 17,440 $ 1,038 $ 11,420 $ 584 $ 7,562 $ 36 The Company had impaired loans on nonaccrual status of $8.5 million at December 31, 2019. The Company had no loans 90 days or more past due and still accruing at December 31, 2019. Troubled Debt Restructurings We sometimes modify or restructure loans when the borrower is experiencing financial difficulties by making a concession to the borrower in the form of changes in the amortization terms, reductions in the interest rates, the acceptance of interest only payments, and, in limited cases, concessions to the outstanding loan balances. These loans are classified as TDRs. TDRs are loans modified for the purpose of alleviating temporary impairments to the borrower’s financial condition or cash flows. A workout plan between us and the borrower is designed to provide a bridge for borrower cash flow shortfalls in the near term. In most cases, the Company initially places TDRs on nonaccrual status, and may be returned to accrual status when the loan is brought current, has performed in accordance with the restructured contractual terms for a period of at least six months, and the ultimate collectability of the total contractual restructured principal and interest is no longer in doubt. At December 31, 2020, the Company had no TDR loans. During the year ended December 31, 2020, there were no loans modified as TDRs. At December 31, 2019, the Company had two TDRs aggregating to $3.0 million, consisting of a franchise non-real estate secured loan of $1.7 million and a commercial and industrial loan of $1.3 million with each’s terms being modified to extend the maturity date for 24 months or less. The modifications did not have a financial impact on the recorded investments. These two TDRs were both current and on accrual status as of December 31, 2019. During the year ended December 31, 2020, both TDRs experienced payment defaults after modifications within the previous 12 months and the remaining balance, which were $1.3 million for commercial and industrial loan and $344,000 for franchise non-real estate secured loan, were charged off in 2020. During the year ended December 31, 2019, there were no TDRs that experienced payment defaults after modifications within the previous 12 months. The CARES Act, signed into law on March 27, 2020, permits financial institutions to suspend requirements under GAAP for loan modifications to borrowers affected by COVID-19 that would otherwise be characterized as TDRs and suspend any determination related thereto if (i) the loan modification is made between March 1, 2020 and the earlier of December 31, 2020 or 60 days after the end of the coronavirus emergency declaration and (ii) the applicable loan was not more than 30 days past due as of December 31, 2019. On April 7, 2020, federal bank regulators issued a joint interagency statement that allows lenders to conclude that a borrower is not experiencing financial difficulty if short-term (e.g., six months or less) modifications are made in response to the COVID-19 pandemic, such as payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant related to loans in which the borrower is less than 30 days past due on its contractual payments at the time a modification program is implemented. The CAA, signed into law on December 27, 2020, extends the applicable period to include modification to loans held by financial institutions executed between March 1, 2020 and the earlier of (i) January 1, 2022, or (ii) 60 days after the date of termination of the COVID-19 national emergency. For COVID-19 related loan modifications in the form of payment deferrals, the delinquency status will not advance and loans that were accruing at the time that the relief is provided will generally not be placed on nonaccrual status during the deferral period. Interest income will continue to be recognized over the contractual life of the loan. However, the Company, through its credit portfolio management activities, has continued to monitor facts and circumstances associated with the underlying credit quality of loans modified under the provisions of the CARES Act in an effort to identify any loans where the accrual of interest during the modification period is no longer appropriate. In such cases, the Company ceases the accrual of

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2020
Credit Loss [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses Prior to the Company’s adoption of ASC 326 on January 1, 2020, the Company maintained an ALLL in accordance with ASC 310 and ASC 450 that covered estimated credit losses on individually evaluated loans that were determined to be impaired, as well as estimated probable incurred losses inherent in the remainder of the loan portfolio. The ALLL was prepared using the information provided by the Company’s credit review process, including internal risk grades for each loan, together with data from peer institutions and economic information gathered from published sources. The loan portfolio was segmented into groups of loans with similar risk characteristics. Each segment possessing varying degrees of risk based on, among other things, the type of loan, the type of collateral and the sensitivity of the borrower or industry to changes in external factors such as economic conditions. An estimated loss rate calculated using the Company’s historical loss rates, adjusted for current portfolio trends, economic conditions, and other relevant internal and external factors, was applied to each segment’s aggregate loan balances. The Company’s base ALLL factors were determined by management using the Bank’s annualized actual trailing charge-off data over a full credit cycle with an approximate average loss emergence period of 1 year to 1.6 years. Potential adjustments to those base factors were made for relevant internal and external factors. Those factors included: • Changes in lending policies and procedures, including underwriting standards and collection, charge-offs and recovery practices; • Changes in the nature and volume of the loan portfolio, including new types of lending; • Changes in the experience, ability, and depth of lending management and other relevant staff that may have an impact on our loan portfolio; • Changes in the volume and severity of adversely classified or graded loans; • Changes in the quality of our loan review system and the management oversight; • The existence and effect of any concentrations of credit and changes in the level of such concentrations; • Changes in national, regional and local economic conditions, including trends in real estate values and the interest rate environment; • Changes in the value of the underlying collateral for collateral-dependent loans; and • The effect of external factors, such as competition, legal developments and regulatory requirements on the level of estimated credit losses in our current loan portfolio For loans risk graded as watch or worse, progressively higher potential loss factors were applied based on migration analysis of risk grading and net charge-offs. Effective January 1, 2020, the Company accounts for credit losses on loans in accordance with ASC 326 - Financial Instruments - Credit Losses , to determine the ACL. ASC 326 requires the Company to recognize estimates for lifetime losses on loans and off-balance sheet loan commitments at the time of origination or acquisition. The recognition of losses at origination or acquisition represents the Company’s best estimate of the lifetime expected credit loss associated with a loan given the facts and circumstances associated with the particular loan, and involves the use of significant management judgement and estimates, which are subject to change based on management’s on-going assessment of the credit quality of the loan portfolio and changes in economic forecasts used in the model. The Company uses a discounted cash flow model when determining estimates for the ACL for commercial real estate loans and commercial loans, which comprise the majority of the loan portfolio. The Company uses a historical loss rate model for retail loans. The Company also utilizes proxy loan data in its ACL model where the Company’s own historical data is not sufficiently available. The discounted cash flow model is applied on an instrument-by-instrument basis, and for loans with similar risk characteristics, to derive estimates for the lifetime ACL for each loan. The discounted cash flow methodology relies on several significant components essential to the development of estimates for future cash flows on loans and off-balance sheet loan commitments. These components consist of: (i) the estimated probability of default, (ii) the estimated loss given default, which represents the estimated severity of the loss when a loan is in default, (iii) estimates for prepayment activity on loans, and (iv) the estimated exposure to the Company at default (“EAD”). These components are also heavily influenced by changes in economic forecasts employed in the model over a reasonable and supportable period. The Company’s ACL methodology for off-balance sheet loan commitments also includes assumptions concerning the probability an unfunded commitment will be drawn upon by the borrower. These assumptions are based on the Company’s historical experience. The Company’s discounted cash flow ACL model for commercial real estate and commercial loans uses internally derived estimates for prepayments in determining the amount and timing of future contractual cash flows to be collected. The estimate of future cash flows also incorporates estimates for contractual amounts the Company believes may not be collected, which are based on assumptions for PD, LGD, and EAD. EAD is the estimated outstanding balance of the loan at the time of default. It is determined by the contractual payment schedule and expected payment profile of the loan, incorporating estimates for expected prepayments and future draws on revolving credit facilities. The Company discounts cash flows using the effective interest rate on the loan. The effective interest rate represents the contractual rate on the loan; adjusted for any purchase premiums or discounts, and deferred fees and costs associated with the origination of the loan. The Company has made an accounting policy election to adjust the effective interest rate to take into consideration the effects of estimated prepayments. The ACL for loans is determined by measuring the amount by which a loan’s amortized cost exceeds its discounted cash flows. Probability of Default The PD for commercial real estate loans is based largely on a model provided by a third party, using proxy loan information. The PDs generated by this model are reflective of current and expected changes in economic conditions and conditions in the commercial real estate market, and how they are expected to impact loan level and property level attributes, and ultimately the likelihood of a default event occurring. Significant loan and property level attributes include: loan-to-value ratios, debt service coverage, loan size, loan vintage and property types. The PD for commercial loans is based on an internally developed PD rating scale that assigns PDs to individual loans based on the Company’s internal risk grade for each loan. This internally developed PD rating scale is based on a combination of the Company’s own historical data and observed historical data from the Company’s peers, which consist of banks that management believes align with the Company’s business profile. As credit risk grades change for loans in the commercial segment, the PD assigned to them also changes. As with commercial real estate loans, the PD for commercial loans is also impacted by current and expected economic conditions. The Company considers loans to be in default when they are 90 days or more past due and still accruing or placed on nonaccrual status. Loss Given Default LGDs for commercial real estate loans are derived from a third party, using proxy loan information, and are based on loan and property level characteristics for loans in the Company’s loan portfolio, such as: loan-to-values, estimated time to resolution, property size, and current and estimated future market price changes for underlying collateral. The LGD is highly dependent upon estimated loan-to-value ratios, and incorporates estimates for the expense associated with managing the loan through to resolution. LGDs also incorporate an estimate for the loss severity associated with loans where the borrower fails to meet their debt obligation at maturity, such as through a balloon payment or the refinancing of the loan through another lender. External factors that have an impact on LGDs include: changes in the CRE Price Index, GDP growth rate, unemployment rates, and the Moody’s Baa rating corporate debt interest rate spread. LGDs are applied to each loan in the commercial real estate portfolio, and in conjunction with the PD, produce estimates for net cash flows not expected to be collected over the estimated term of the loan. LGDs for commercial loans are also derived from a third party that has a considerable database of credit related information specific to the financial services industry and the type of loans within this segment, and is used to generate annual default information for commercial loans. These proxy LGDs are dependent upon data inputs such as: credit quality, borrower industry, region, borrower size, and debt seniority. LGDs are then applied to each loan in the commercial portfolio, and in conjunction with the PD, produce estimates for net cash flows not expected to be collected over the estimated term of the loan. Historical Loss Rates for Retail Loans The historical loss rate model for retail loans is derived from a third party that has a considerable database of credit related information for retail loans. Key loan level attributes and economic drivers in determining the loss rate for retail loans include FICO scores, vintage, as well as geography, unemployment rates, and changes in consumer real estate prices. Economic Forecasts GAAP requires the Company to develop reasonable and supportable forecasts of future conditions, and estimate how those forecasts are expected to impact a borrower’s ability to satisfy their obligation to the Bank and the ultimate collectability of future cash flows over the life of the loan. The Company uses economic forecast scenarios from an independent third party, Moody’s Analytics, in its estimation of a borrower’s ability to repay a loan in future periods. These scenarios are based on past events, current conditions, and the likelihood of future events occurring. These scenarios typically are comprised of: (1) a base-case scenario, (2) an upside scenario, representing slightly better economic conditions than currently experienced and, (3) a downside scenario, representing recessionary conditions. Management periodically evaluates economic forecast scenarios and may decide that a particular economic scenario or a combination of probability-weighted economic scenarios should be used in the Company’s ACL model. The economic scenarios chosen for the model, the extent to which more than one scenario is used, and the weights that are assigned to them, are based on the Company’s estimate of the probability of each scenario occurring, which is based in part on analysis performed by an independent third-party. Economic scenarios chosen, as well as the assumptions within those scenarios, and whether to use a probability-weighted multiple scenario approach, can vary from one period to the next based on changes in current and expected economic conditions, and due to the occurrence of specific events such as the on-going COVID-19 pandemic. The Company recognizes the non-linearity of credit losses relative to economic performance and thus the Company believes consideration of and, if appropriate under the circumstances, use of multiple probability-weighted economic scenarios is appropriate in estimating credit losses over the forecast period. This approach is based on certain assumptions. The first assumption is that no single forecast of the economy, however detailed or complex, is completely accurate over a reasonable forecast time-frame, and is subject to revisions over time. By considering multiple scenario outcomes and assigning reasonable probability weightings to them, some of the uncertainty associated with a single scenario approach, the Company believes, is mitigated. As of January 1, 2020, upon the adoption of ASC 326, the Company’s ACL model used three probability-weighted forecast scenarios representing a base-case scenario, an upside scenario, and a downside scenario. The weightings assigned to each scenario were as follows: the base-case scenario, or most likely scenario, was assigned a weighting of 40%, while the upside and downside scenarios were each assigned weightings of 30%. As of December 31, 2020, the Company’s ACL model used the same three probability weighted scenarios, updated for current expected economic conditions, including the current and estimated future impact associated with the on-going COVID-19 pandemic. The Company evaluated the weightings of each economic scenario in the current period with the assistance of Moody's Analytics, and determined the current weightings of 40% for the base-case scenario, and 30% for each of the upside and downside scenarios appropriately reflect the likelihood of outcomes for each scenario given the current economic environment. The Company currently forecasts economic conditions over a two-year period, which we believe is a reasonable and supportable period. Beyond the point which the Company can provide for a reasonable and supportable forecast, economic variables revert to historical long-term averages. The Company has reflected this reversion over a period of three years in each of its economic scenarios used to generate the overall probability-weighted forecast. Changes in economic forecasts impact the PD, LGD, and EAD for each loan, and therefore influence the amount of future cash flows from each loan the Company does not expect to collect. The Company derives the economic forecasts it uses in its ACL model from Moody's Analytics that has a large team of economists, data-base managers, and operational engineers with a history of producing monthly economic forecasts for over 25 years. The forecasts produced by this third party have been widely used by banks, credit unions, government agencies, and real estate developers. These economic forecasts cover all states and metropolitan areas in the Unites States, and reflect changes in economic variables such as: GDP growth, interest rates, employment rates, changes in wages, retail sales, industrial production, metrics associated with the single-family and multifamily housing markets, vacancy rates, changes in equity market prices, and energy markets. It is important to note that the Company’s ACL model relies on multiple economic variables, which are used under several economic scenarios. Although no one economic variable can fully demonstrate the sensitivity of the ACL calculation to changes in the economic variables used in the model, the Company has identified certain economic variables that have significant influence in the Company’s model for determining the ACL. As of December 31, 2020, the Company’s ACL model incorporated the following assumptions for key economic variables in the base-case and downside scenarios: Base-case Scenario: • CRE Price Index experiences declines throughout 2021, with the estimated annualized rate of decline slowing from approximately -28% in early 2021 to approximately -13% by the end of 2021. This scenario also assumes the CRE Price Index returns to modest levels of growth by the second quarter of 2022. • U.S. real GDP experiences modestly increasing levels of growth throughout 2021 in the range of 2-6% on an annualized basis. This scenario also assumes modest levels of growth in 2022 at an approximate annualized rate of 4%. • U.S. unemployment of approximately 7% throughout 2021, followed by modest declines throughout 2022 to an approximate level of 5% by the end of 2022. Upside Scenario: • CRE Price Index experiences declines throughout 2021, with the estimated annualized rate of decline slowing from approximately -16% in early 2021 to approximately -9% by the end of 2021. This scenario also assumes the CRE Price Index returns to modest levels of growth by the second quarter of 2022. • U.S. real GDP experiences modestly increasing levels of growth throughout 2021 in the range of 5-8% on an annualized basis. This scenario also assumes modest levels of annualized growth in 2022 in an approximate range of 2-4%. • U.S. unemployment declining from approximately 6% to approximately 5% by the end of 2021. This scenario also assumes the rate of unemployment continues to decline throughout 2022 to an approximate level of 4% by the end of 2022. Downside Scenario: • CRE Price Index experiences significant declines throughout 2021, with the estimated annualized rate of decline slowing from approximately -36% in early 2021 to approximately -26% by the end of 2021. This scenario also assumes the CRE Price Index returns to modest levels of growth by the third quarter of 2022. • U.S. real GDP experiences slowing rates of decline through the third quarter of 2020, from an approximate rate of -5% to -0.3%, before returning to growth in the fourth quarter of 2022. This scenario also assumes modest levels of annualized growth in 2022 in an approximate range of 2-4%. • Increasing levels of U.S. unemployment throughout 2021, with the rate of unemployment increasing each quarter to approximately 10% by the end of 2021. This scenario also assumes the rate of unemployment remains elevated in 2022, but begins to fall to approximately 9% by the end of 2022. Qualitative Adjustments The Company recognizes that historical information used as the basis for determining future expected credit losses may not always, by itself, provide a sufficient basis for determining future expected credit losses. The Company, therefore, periodically considers the need for qualitative adjustments to the ACL. Qualitative adjustments may be related to and include, but not be limited to, factors such as: (i) management’s assessment of economic forecasts used in the model and how those forecasts align with management’s overall evaluation of current and expected economic conditions, (ii) organization specific risks such as credit concentrations, collateral specific risks, regulatory risks, and external factors that may ultimately impact credit quality, (iii) potential model limitations such as limitations identified through back-testing, and other limitations associated with factors such as underwriting changes, acquisition of new portfolios, and changes in portfolio segmentation, and (iv) management’s overall assessment of the adequacy of the ACL, including an assessment of model data inputs used to determine the ACL. As of December 31, 2020, qualitative adjustments included in the ACL totaled $10.0 million. These adjustments relate to management’s overall assessment of the adequacy of the ACL and the potential for the model, as of December 31, 2020, to underestimate the effects of current changes in asset quality. Management reviews the need for and appropriate level of qualitative adjustments on a quarterly basis, and as such, the amount and allocation of qualitative adjustments may change in future periods. The following table provides the allocation of the ACL for loans held for investment as well as the activity in the ACL attributed to various segments in the loan portfolio as of, and for the period indicated: For the Year Ended December 31, 2020 Beginning ACL Balance (1) Adoption of ASC 326 Initial ACL Recorded for PCD Loans Charge-offs Recoveries Provision for Credit Losses Ending (Dollars in thousands) Investor loans secured by real estate CRE non-owner occupied $ 1,899 $ 8,423 $ 3,025 $ (839) $ 44 $ 36,624 $ 49,176 Multifamily 729 9,174 8,710 — — 43,921 62,534 Construction and land 4,484 (124) 2,051 (539) — 6,563 12,435 SBA secured by real estate 1,915 (1,401) — (705) 34 5,316 5,159 Business loans secured by real estate CRE owner-occupied 2,781 20,166 3,766 (1,739) 59 25,484 50,517 Franchise real estate secured 592 5,199 — (932) — 6,592 11,451 SBA secured by real estate 2,119 2,207 235 (338) 147 2,197 6,567 Commercial loans Commercial and industrial 13,857 87 2,325 (6,891) 1,818 35,768 46,964 Franchise non-real estate secured 5,816 9,214 — (6,731) 866 11,360 20,525 SBA non-real estate secured 445 218 924 (899) 14 293 995 Retail loans Single family residential 655 541 206 (106) 2 (94) 1,204 Consumer loans 406 1,982 — (139) 4 (1,762) 491 Totals $ 35,698 $ 55,686 $ 21,242 $ (19,858) $ 2,988 $ 172,262 $ 268,018 ______________________________ (1) Beginning ACL balance represents the ALLL accounted for under ASC 450 and ASC 310, which is reflective of probable incurred losses as of the balance sheet date. The following table provides the allocation of the ALLL for loans held for investment as well as the activity attributed to various segments in the loan portfolio as of, and for the period indicated, as determined in accordance with ASC 450 and ASC 310, prior to the adoption of ASC 326: For the Year Ended December 31, 2019 Beginning ALLL Balance Charge-offs Recoveries Provision for Credit Losses Ending (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 1,624 $ (625) $ — $ 900 $ 1,899 Multifamily 740 — — (11) 729 Construction and land 5,964 — — (1,480) 4,484 SBA secured by real estate 1,827 (742) — 830 1,915 Business loans secured by real estate CRE owner-occupied 1,908 (125) 46 952 2,781 Franchise real estate secured 743 (1,377) — 1,226 592 SBA secured by real estate 1,824 (908) 10 1,193 2,119 Commercial loans Commercial and industrial 13,695 (2,318) 189 2,291 13,857 Franchise non-real estate secured 6,066 (1,154) 18 886 5,816 SBA non-real estate secured 654 (588) 68 311 445 Retail loans Single family residential 808 — 2 (155) 655 Consumer loans 219 (16) 11 192 406 Totals $ 36,072 $ (7,853) $ 344 $ 7,135 $ 35,698 For the Year Ended December 31, 2018 Beginning ALLL Balance Charge-offs Recoveries Provision for Credit Losses Ending (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 1,273 $ — $ — $ 351 $ 1,624 Multifamily 614 — — 126 740 Construction and land 5,565 — — 399 5,964 SBA secured by real estate 1,396 — — 431 1,827 Business loans secured by real estate CRE owner-occupied 923 (33) 47 971 1,908 Franchise real estate secured 602 — — 141 743 SBA secured by real estate 901 — — 923 1,824 Commercial loans Commercial and industrial 11,018 (1,411) 698 3,390 13,695 Franchise non-real estate secured 5,191 — — 875 6,066 SBA non-real estate secured 594 (102) 169 (7) 654 Retail loans Single family residential 804 — 13 (9) 808 Consumer loans 55 (409) 8 565 219 Totals $ 28,936 $ (1,955) $ 935 $ 8,156 $ 36,072 The increase in the ACL for loans held-for-investment during the year ended December 31, 2020 of $232.3 million is reflective of $172.3 million in provisions for credit losses, net charge-offs of $16.9 million, the establishment of $21.2 million in net ACL for PCD loans acquired in the Opus acquisition, and a $55.7 million adjustment to the ACL associated with the Company’s January 1, 2020 adoption of ASC 326, which was recorded through a cumulative effect adjustment to retained earnings. The provision for credit losses in 2020 is inclusive of $75.9 million related to the initial ACL required for the acquisition of non-PCD loans in the Opus acquisition. Under ASC 326, the Company is required to record an ACL for estimates of life-time credit losses on loans at the time of acquisition. For non-PCD loans, the initial ACL is established through a charge to provision for credit losses at the time of acquisition. However, the ACL for PCD loans is established through an adjustment to the loan’s purchase price (or initial fair value). Excluding the impact of the Opus acquisition, the provision for credit losses of $96.4 million for the year ended December 31, 2020 is also reflective of unfavorable economic forecasts employed in the Company’s ACL model driven by the on-going COVID-19 pandemic. As previously mentioned, prior to the Company’s adoption of ASC 326 on January 1, 2020, the Company maintained an allowance for loan and lease losses in accordance with ASC 450 and ASC 310, which required the Company to measure credit losses on loans using a probable incurred loss model. The probable incurred loss model was reflective of estimates for loan losses incurred and inherent in the loan portfolio as of the balance sheet date, and did not reflect current estimates of future expected credit losses over the lives of the Company’s loans, as now required by ASC 326. For the years ended December 31, 2019 and 2018, the Company recorded provisions for loan losses for loans held-for-investment of $7.1 million and $8.2 million, respectively. Provisions for loan losses in 2019 reflected the replenishment of ALLL as a result of charge-offs. Provisions for loan losses in 2018 were largely driven by the growth in the Company’s loan portfolio primarily attributable to the acquisition of Grandpoint. Allowance for Credit Losses for Off-Balance Sheet Commitments The Company maintains an allowance for credit losses on off-balance sheet commitments related to unfunded loans and lines of credit, which is included in other liabilities of the consolidated balance sheets. Upon the Company’s adoption of ASC 326 on January 1, 2020, the Company applies an expected credit loss estimation methodology for off-balance sheet commitments. This methodology is commensurate with the methodology applied to each respective segment of the loan portfolio in determining the ACL for loans held-for-investment. The loss estimation process includes assumptions for the probability that a loan will fund, as well as the expected amount of funding. These assumptions are based on the Company’s own historical internal loan data. The allowance for off-balance sheet commitments was $31.1 million at December 31, 2020 and $3.3 million at December 31, 2019. The change in the allowance for off-balance sheet commitments can be attributed to several factors, including: (i) an $8.3 million increase in the first quarter of 2020 attributed to the Company’s adoption of ASC 326, (ii) an $8.6 million provision for credit losses in the second quarter of 2020 related to the required initial ACL on off-balance sheet loan commitments that the Company was required to establish at the time of acquisition of Opus, and (iii) an $11.0 million in provision for credit losses during 2020 related primarily to the deterioration in economic forecasts employed in the Company’s CECL model. For the year ended December 31, 2019, the Company recorded a recapture provision for off-balance sheet commitments of $1.4 million. For the year ended December 31, 2018, the Company recorded a provision for unfunded loan commitments of $97,000. The recapture of and provision for off-balance sheet loan commitments in 2019 and 2018 can be attributed to changes in the level of unfunded loan commitments during those periods. The following table presents loans individually and collectively evaluated for impairment and their respective ALLL allocation at December 31, 2019 as determined in accordance with ASC 450 and ASC 310, prior to the adoption of ASC 326: December 31, 2019 Loans Evaluated Individually for Impairment ALLL Attributed to Individually Evaluated Loans Loans Evaluated Collectively for Impairment ALLL Attributed to Collectively Evaluated Loans (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 1,088 $ — $ 2,069,053 $ 1,899 Multifamily — — 1,575,726 729 Construction and land — — 438,786 4,484 SBA secured by real estate 390 — 68,041 1,915 Business loans secured by real estate CRE owner-occupied — — 1,846,554 2,781 Franchise real estate secured — — 353,240 592 SBA secured by real estate 1,517 — 86,864 2,119 Commercial loans Commercial and industrial 7,529 — 1,385,741 13,857 Franchise non-real estate secured 10,834 — 553,523 5,816 SBA non-real estate secured 1,118 — 16,308 445 Retail loans Single family residential 366 — 254,658 655 Consumer loans — — 50,975 406 Totals $ 22,842 $ — $ 8,699,469 $ 35,698 The following table presents PD bands for commercial real estate and commercial loan segments of the loan portfolio as of the date indicated. Commercial Real Estate Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied 0% - 5.00% $ 261,885 $ 491,522 $ 431,791 $ 266,942 $ 254,527 $ 763,101 $ 11,114 $ — $ 2,480,882 >5.00% - 10.00% 4,016 34,360 5,794 10,558 16,961 33,734 — — 105,423 Greater than 10% — 25,844 11,480 10,517 10,782 29,598 559 — 88,780 Multifamily 0% - 5.00% 950,089 1,610,011 878,233 634,268 349,549 516,452 — — 4,938,602 >5.00% - 10.00% 38,892 59,500 12,181 19,751 10,917 13,606 — — 154,847 Greater than 10% 38,663 9,963 11,339 12,479 3,814 1,229 420 — 77,907 Construction and Land 0% - 5.00% 55,785 40,860 4,604 11,238 — 6,412 784 — 119,683 >5.00% - 10.00% 1,123 41,046 9,197 3,601 — 260 — — 55,227 Greater than 10% 401 62,853 59,512 3,786 20,531 — — — 147,083 SBA secured by real estate 0% - 5.00% 496 10,400 12,558 14,497 7,078 10,032 — — 55,061 >5.00% - 10.00% — — — 1,012 — — — — 1,012 Greater than 10% — 158 589 — — 511 — — 1,258 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loans secured by real estate CRE owner-occupied 0% - 5.00% $ 286,745 $ 367,269 $ 274,512 $ 295,809 $ 202,282 $ 422,614 $ 10,393 $ 246 $ 1,859,870 >5.00% - 10.00% 8,769 42,310 60,222 28,421 23,875 44,855 3,875 — 212,327 Greater than 10% — 16,096 5,376 7,459 4,263 8,409 250 — 41,853 Franchise real estate secured 0% - 5.00% 37,262 79,926 65,619 96,672 19,046 22,927 — — 321,452 >5.00% - 10.00% 7,587 1,650 3,274 327 5,627 4,093 — — 22,558 Greater than 10% 442 1,512 — — 1,968 — — — 3,922 SBA secured by real estate 0% - 5.00% 3,253 7,637 11,840 15,069 5,707 18,742 — — 62,248 >5.00% - 10.00% — — 768 989 2,780 4,882 — — 9,419 Greater than 10% — — 1,384 1,987 1,514 3,043 — — 7,928 Total business loans secured by real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 Commercial Real Estate Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Commercial Loans Commercial and industrial 0% - 5.00% $ 70,233 $ 205,395 $ 99,178 $ 193,046 $ 36,957 $ 62,682 $ 394,124 $ 5,051 $ 1,066,666 >5.00% - 10.00% 49,883 50,743 35,813 13,427 12,922 13,948 322,123 2,469 501,328 Greater than 10% 7,701 7,540 29,078 4,485 4,574 8,350 136,253 2,859 200,840 Franchise non-real estate secured 0% - 5.00% 21,409 145,392 88,171 38,010 21,956 23,479 — 502 338,919 >5.00% - 10.00% 6,198 15,754 5,454 8,164 18,415 3,626 — — 57,611 Greater than 10% — 16,836 6,612 18,655 1,638 3,165 1,361 — 48,267 SBA not secured by real estate 0% - 5.00% 407 2,257 910 1,078 441 2,782 — — 7,875 >5.00% - 10.00% — — 648 1,596 169 1,652 — 259 4,324 Greater than 10% — 83 357 1,856 340 415 707 — 3,758 Total commercial loans $ 155,831 $ 444,000 $ 266,221 $ 280,317 $ 97,412 $ 120,099 $ 854,568 $ 11,140 $ 2,229,588 A significant driver in the ACL for loans in the investor real estate secured and business real estate secured segments is loan to value (“LTV”). The following table summarizes the amortized cost of loans in these segments by current estimated LTV and by year of origination as of the date indicated: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied 55% and below $ 138,007 $ 229,272 $ 182,385 $ 136,355 $ 189,848 $ 588,230 $ 11,114 $ — $ 1,475,211 >55-65% 101,434 217,210 92,015 130,024 78,470 204,161 559 — 823,873 >65-75% 26,460 102,494 169,878 18,876 13,952 29,506 — — 361,166 Greater than 75% — 2,750 4,787 2,762 — 4,536 — — 14,835 Multifamily 55% and below 218,833 345,519 294,464 233,997 84,530 269,906 — — 1,447,249 >55-65% 381,737 731,408 381,282 215,170 152,066 189,151 420 — 2,051,234 >65-75% 427,074 583,078 215,389 215,452 127,684 66,457 — — 1,635,134 Greater than 75% — 19,469 10,618 1,879 — 5,773 — — 37,739 Construction and land 55% and below 57,309 105,308 36,068 18,625 20,531 6,672 784 — 245,297 >55-65% — 36,113 23,770 — — — — — 59,883 >65-75% — 3,338 13,475 — — — — — 16,813 Greater than 75% — — — — — — — — — SBA secured by real estate 55% and below — 2,066 649 673 317 778 — —

Other Real Estate Owned

Other Real Estate Owned	12 Months Ended
	Dec. 31, 2020
Other Real Estate [Abstract]
Other Real Estate Owned	Other Real Estate Owned The following table summarizes the activity in other real estate owned for the years ended December 31: 2020 2019 2018 (Dollars in thousands) Balance, beginning of year $ 441 $ 147 $ 326 Additions: Acquisitions — — 524 Foreclosures 208 644 15 Sales (537) (329) (1,055) Gain (loss) on sale (57) (20) 346 Write downs (55) (1) (9) Balance, end of year $ — $ 441 $ 147

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment The Company’s premises and equipment consisted of the following at December 31: 2020 2019 (Dollars in thousands) Land $ 16,090 $ 13,820 Premises 20,371 16,697 Leasehold improvements 36,634 25,884 Furniture, fixtures, and equipment 48,723 33,871 Automobiles 185 173 Subtotal 122,003 90,445 Less: accumulated depreciation 43,119 31,444 Total $ 78,884 $ 59,001

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets At December 31, 2020, the Company had goodwill of $898.6 million. In June 2020, the Company acquired Opus, which resulted in the recognition of approximately $90.2 million in goodwill assets including post-acquisition measurement period purchase accounting adjustments of $2.6 million to the fair value of assets acquired and liabilities assumed. In 2019, adjustments to goodwill in the amount of $404,000 were related to fair value adjustments associated with the acquisition of Grandpoint Capital, Inc. (“Grandpoint”) and were recorded during the 12-month measurement period subsequent to the acquisition date. In 2018, additions to goodwill included $313.0 million due to the acquisition of Grandpoint and adjustments to goodwill in the amount of $1.8 million for Plaza Bancorp (“PLZZ”) and $600,000 for Heritage Oaks Bank (“HEOP”), both of which were recorded during the 12-month measurement period subsequent to the acquisition date. The following table presents changes in the carrying value of goodwill for the periods indicated: 2020 2019 2018 (Dollars in thousands) Balance, beginning of year $ 808,322 $ 808,726 $ 493,329 Goodwill acquired during the year 92,844 — 313,043 Purchase accounting adjustments (2,597) (404) 2,354 Balance, end of year $ 898,569 $ 808,322 $ 808,726 Accumulated impairment losses at end of year $ — $ — $ — The amount of goodwill is subject to change, as the Company’s fair value estimates for assets acquired and liabilities assumed in the Opus acquisition are considered preliminary, and are subject to refinement for a period of one year after the closing date of the acquisition as additional information related to those fair value estimates becomes available or such information is considered final. The Company’s policy is to assess goodwill for impairment on an annual basis during the fourth quarter of each year, and more frequently if events or circumstances lead management to believe the value of goodwill may be impaired. Given the volatility observed in economic conditions and in the equity markets during 2020, triggered by the outbreak of the COVID-19 pandemic, the Company performed a qualitative assessment of goodwill each quarter commencing with the quarter ended March 31, 2020. No impairment of goodwill was determined to exist as a result of the quarterly analyses in 2020. In accordance with ASC 350-20, Intangibles - Goodwill and Other - Goodwill , the Company made an unconditional election to forego a qualitative assessment of goodwill and proceed directly to the quantitative assessment of goodwill during the fourth quarter of 2020. The Company’s quantitative assessment of goodwill in the fourth quarter of 2020 consisted of a market approach as well as a discounted cash flow approach, both of which were given equal weighting in the analysis. The results of this analysis indicated the estimated fair value of the Company exceeded its carrying value and that the value of goodwill assets could be supported and there was no goodwill impairment as of December 31, 2020. The market approach utilized in the Company’s goodwill assessment utilized observed valuation multiples, such as price-to-tangible book values, of the Company’s peers, as well as premiums paid in bank mergers completed over the last four years. In addition, the market approach component of the Company’s quantitative assessment incorporated estimates for a control premium, which was based on market observations. The discounted cash flow approach utilized in the Company’s goodwill assessment relied upon internal projections of future operating results, as well as estimates for an appropriate discount rate, representative of the estimated cost of equity. At December 31, 2020, the Company had other intangible assets of $85.5 million, consisting of $82.5 million in core deposit intangibles and $3.0 million in customer relationship intangibles. The Company had $19.3 million of additions to other intangible assets during 2020, consisting of $16.1 million of core deposit intangible assets and $3.2 million of customer relationship intangibles, both the result of the Opus acquisition. The following table summarizes the change in the balance of core deposit intangibles and customer relationship intangible assets, and the related accumulated amortization for the periods indicated below: 2020 2019 2018 (Dollars in thousands) Gross balance of intangible assets: Balance, beginning of year $ 125,945 $ 125,945 $ 54,809 Additions due to acquisitions 19,267 — 71,136 Balance, end of year 145,212 125,945 125,945 Accumulated amortization: Balance, beginning of year (42,633) (25,389) (11,795) Amortization (17,072) (17,244) (13,594) Balance, end of year (59,705) (42,633) (25,389) Net intangible assets, end of year $ 85,507 $ 83,312 $ 100,556 The Company amortizes the core deposit intangibles and customer relationship intangibles based on the projected useful lives of the related deposits in the case of core deposit intangibles, and over the projected useful lives of the related client relationships in the case of customer relationship intangibles, typically ranging from six

Bank Owned Life Insurance

Bank Owned Life Insurance	12 Months Ended
	Dec. 31, 2020
Investments, All Other Investments [Abstract]
Bank Owned Life Insurance	Bank Owned Life Insurance At December 31, 2020 and 2019, the Company had investments in BOLI of $292.6 million and $113.4 million, respectively. The increase from the prior year was a result of the acquisition of Opus, which added $191.4 million in BOLI. The Company recorded noninterest income associated with the BOLI policies of $7.2 million, $3.5 million, and $3.4 million for the years ending December 31, 2020, 2019, and 2018, respectively.BOLI involves the purchasing of life insurance by the Company on a select group of employees where the Company is the owner and beneficiary of the policies. BOLI is recorded as an asset at its cash surrender value. Increases in the cash surrender value of these policies, as well as a portion of the insurance proceeds received, are recorded in noninterest income and are not subject to income tax, as long as they are held for the life of the covered parties.

Investments in Qualified Afford

Investments in Qualified Affordable Housing Partnerships	12 Months Ended
	Dec. 31, 2020
Federal Home Loan Banks [Abstract]
Investments in Qualified Affordable Housing Partnerships	Investments in Qualified Affordable Housing Partnerships The Company invests in certain affordable housing projects in the form of ownership interests in limited partnerships or limited liability companies that qualify for CRA credit and generate low income housing tax credits (“LIHTC”) and other tax benefits for the Company over an approximate 10 year period. The Company records its investments in qualified affordable housing partnerships, using either the proportional amortization method or the cost method. Under the proportional amortization method, the Company amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits that are allocated to the Company over the period of the investment. The net benefits of these investments, which is comprised of tax credits and operating loss tax benefits, net of investment amortization, are recognized in the income statement as a component of income tax expense (benefit). At December 31, 2020 and 2019 the carrying value of these investments was $86.8 million and $49.9 million, respectively. For certain of the Company’s investments in qualified affordable housing partnerships that do not qualify for the application of the proportional amortization method, the Company applies the cost method. Under the cost method, the Company amortizes the initial cost of the investment as noninterest expense equally over the expected time period in which tax credits and other tax benefits will be received. Tax credits on these investments are recognized as a component of income tax expense (benefit). At December 31, 2020 and 2019 the carrying value of these investments was $3.0 million and $4.0 million, respectively. The Company’s net investment in qualified affordable housing projects that generate LIHTC at December 31, 2020 and 2019 was $89.8 million and $53.9 million, respectively, and are recorded in other assets in the consolidated statement of financial condition. The change in the aggregate carrying value of these investments in 2020 is largely attributable to the acquisition of Opus in June 2020, through which the Company acquired approximately $45.4 million of investments in qualified affordable housing partnerships. The total unfunded commitments related to the investments in qualified affordable housing partnerships totaled $18.1 million and $21.4 million at December 31, 2020 and 2019, respectively, and are recorded under accrued expenses and other liabilities. As of December 31, 2020, the Company’s unfunded affordable housing partnerships commitments were estimated to be paid as follows: Amount Year Ending December 31, (Dollars in thousands) 2021 $ 10,548 2022 4,627 2023 1,032 2024 492 2025 250 Thereafter 1,129 Total unfunded commitments $ 18,078 The following table presents tax credits and other tax benefits generated by operating losses from qualified affordable housing projects as well as amortization expense associated with these investments for the years ended December 31, 2020, 2019, and 2018. 2020 2019 2018 (Dollars in thousands) Tax credit and other tax benefits recognized $ 11,435 $ 6,506 $ 4,748 Amortization of investments 9,674 5,527 4,574 There were no impairment losses related to LIHTC investments for the years ended December 31, 2020, 2019, and 2018.

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	Variable Interest Entities The Company is involved with VIEs through its loan securitization activities, affordable housing investments that qualify for LIHTC, and trust subsidiaries, which have issued trust preferred securities. The Company has determined that its interests in these entities meet the definition of variable interests. As of December 31, 2020 and December 31, 2019, the Company determined it was not the primary beneficiary of the VIEs and did not consolidate its interests in VIEs. The following table provides a summary of the carrying amount of assets and liabilities in the Company’s consolidated balance sheet and maximum loss exposures as of December 31, 2020 and December 31, 2019 that relate to variable interests in non-consolidated VIEs. December 31, 2020 December 31, 2019 Maximum Loss Assets Liabilities Maximum Loss Assets Liabilities (Dollars in thousands) Multifamily loan securitization: Investment securities (1) $ 100,927 $ 100,927 $ — $ — $ — $ — Reimbursement obligation (2) 50,901 — 448 — — — Affordable housing partnership: Other investments (3) 71,681 89,759 — 32,466 53,880 — Unfunded equity commitments (2) — — 18,078 — — 21,414 Total $ 223,509 $ 190,686 $ 18,526 $ 32,466 $ 53,880 $ 21,414 ______________________________ (1) Included in investment securities available-for-sale on the consolidated statement of financial condition. (2) Included in accrued expenses and other liabilities on the consolidated statement of financial condition. (3) Included in other assets on the consolidated statement of financial condition. . Multifamily loan securitization With respect to the securitization transaction with Freddie Mac discussed in Note 4 - Loans , the Company’s variable interests reside with the purchase of the underlying Freddie Mac-issued guaranteed, structured pass-through certificates that were held as investment securities available-for-sale at fair value as of December 31, 2020. Additionally, the Company has variable interests through a reimbursement agreement executed by Freddie Mac that obligates the Company to reimburse Freddie Mac for any defaulted contractual principal and interest payments identified after the ultimate resolution of the defaulted loans. Such reimbursement obligations are not to exceed 10% of the original principal amount of the loans comprising the securitization pool. As part of the securitization transaction, the Company released all servicing obligations and rights to Freddie Mac who was designated as the Master Servicer. In its capacity as Master Servicer, Freddie Mac can terminate the Company’s role as sub-servicer and direct such responsibilities accordingly. In evaluating our variable interests and continuing involvement in the VIE, we determined that we do not have the power to make significant decisions or direct the activities that most significantly impact the economic performance of the VIE’s assets and liabilities. As sub-servicer of the loans, the Company does not have the authority to make significant decisions that influence the value of the VIE’s net assets and, therefore, the Company is not the primary beneficiary of the VIE. As a result, we determined that the VIE associated with the multifamily securitization should not be included in the Consolidated Financial Statements of the Company. We believe that our maximum exposure to loss as a result of our involvement with the VIE associated with the securitization is the carrying value of the investment securities issued by Freddie Mac and purchased by the Company. Additionally, our maximum exposure to loss under the reimbursement agreement executed with Freddie Mac is 10% of the original principal amount of the loans comprising the securitization pool, or $50.9 million. Based upon our analysis of quantitative and qualitative data over the underlying loans included in the securitization pool, as of December 31, 2020, our reserve for estimated losses with respect to the reimbursement obligation was $448,000. Investments in qualified affordable housing partnerships The Company has variable interests through its affordable housing partnerships. These investments are fundamentally designed to provide a return through the generation of income tax credits. The Company has evaluated its involvement with the low-income housing projects and determined it does not have significant influence or decision making capabilities to manage the projects, and therefore, is not the primary beneficiary, and does not consolidate these interests. The Company’s maximum exposure to loss, exclusive of any potential realization of tax credits, is equal to the commitments invested, adjusted for amortization. The amount of unfunded commitments was included in the investments recognized as assets with a corresponding liability. The table above summarizes the amount of tax credit investments held as assets, the amount of unfunded commitments held as liabilities, and the maximum exposure to loss as of December 31, 2020 and December 31, 2019, respectively. Trust preferred securities The Company accounts for its investments in its wholly owned special purpose entities, Heritage Oaks Capital Trust II and Santa Lucia Bancorp (CA) Capital Trust, acquired through bank acquisitions, under the equity method whereby the subsidiary’s net earnings are recognized in the Company’s consolidated statement of income and the investment in these entities is included in other assets in the Company’s consolidated statements of financial condition. The Corporation is not allowed to consolidate the capital trusts as they have been formed for the sole purpose of issuing trust preferred securities, from which the proceeds were invested in the Company’s junior subordinated debt securities and reflected in our consolidated statements of financial condition as subordinated debentures with the corresponding interest distributions reflected as interest expense in the consolidated statements of income. The capital securities are subject to mandatory redemption, in whole or in part, upon repayment of the subordinated debt. The Company has entered into agreements which, taken collectively, fully and unconditionally guarantee the capital securities subject to the terms of each of the guarantees. The capital securities held by the capital trust qualify as Tier 2 capital. See Note 14 - Subordinated Debentures for additional information.

Deposit Accounts

Deposit Accounts	12 Months Ended
	Dec. 31, 2020
Deposits Liabilities [Abstract]
Deposit Accounts	Deposit Accounts Deposit accounts and weighted average interest rates consisted of the following at December 31: 2020 2019 Amount Weighted Amount Weighted (Dollars in thousands) Noninterest-bearing checking $ 6,011,106 — % $ 3,857,660 — % Interest-bearing checking 2,913,260 0.06 % 586,019 0.43 % Money market 5,302,073 0.23 % 3,171,164 0.83 % Savings 360,896 0.09 % 235,824 0.16 % Certificates of deposit accounts $250,000 or less 800,957 0.88 % 500,331 1.59 % Greater than $250,000 825,885 0.88 % 547,511 1.77 % Total certificates of deposit accounts 1,626,842 0.88 % 1,047,842 1.69 % Total deposits $ 16,214,177 0.18 % $ 8,898,509 0.53 % The aggregate annual maturities of certificates of deposit accounts at December 31, 2020 are as follows: 2020 Amount Weighted Average Interest Rate (Dollars in thousands) Within 3 months $ 692,493 0.81 % 4 to 6 months 363,533 1.12 % 7 to 12 months 377,731 0.89 % 13 to 24 months 86,934 0.82 % 25 to 36 months 13,217 1.56 % 37 to 60 months 9,576 1.24 % Over 60 months 83,358 0.35 % Total $ 1,626,842 0.88 % Interest expense on deposit accounts for the years ended December 31 is summarized as follows: 2020 2019 2018 (Dollars in thousands) Checking accounts $ 3,295 $ 2,340 $ 1,167 Money market accounts 19,903 28,279 19,567 Savings 393 382 357 Certificates of deposit accounts 10,745 27,296 16,562 Total $ 34,336 $ 58,297 $ 37,653 Accrued interest on deposits, which is included in accrued expenses and other liabilities, was $507,000 at December 31, 2020 and $590,000 at December 31, 2019.

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances and Other Borrowings	12 Months Ended
	Dec. 31, 2020
Advances from Federal Home Loan Banks [Abstract]
Federal Home Loan Bank Advances and Other Borrowings	Federal Home Loan Bank Advances and Other Borrowings As of December 31, 2020, the Company has a line of credit with the FHLB that provides for advances totaling up to 40% of the Company’s assets, equating to a credit line of $7.94 billion, of which $4.74 billion was available for borrowing. The available for borrowing was based on collateral pledged by real estate loans with an aggregate balance of $7.25 billion. At December 31, 2020, the Company had $31.0 million term advances, compared to $491.0 million in overnight FHLB advances and $26.0 million term advances at December 31, 2019. The term advances have maturity dates ranging from May 2021 to June 2022 and rates ranging from 0.00% to 2.47% . The following table summarizes activities in advances from the FHLB for the periods indicated: Year Ended December 31, 2020 2019 (Dollars in thousands) Average balance outstanding $ 139,190 $ 404,959 Weighted average rate 1.10 % 2.43 % Maximum amount outstanding at any month-end during the year $ 521,017 $ 1,091,596 Balance outstanding at end of year 31,000 517,026 Weighted average interest rate at year-end 1.53 % 1.69 % At December 31, 2020, the Bank had unsecured lines of credit with eight correspondent banks for a total amount of $340.0 million and access through the Federal Reserve discount window to borrow $21.3 million secured by investment securities. At December 31, 2020 and December 31, 2019, the Company had no outstanding balances against these lines. The Company maintains additional sources of liquidity at the Corporation level. The $15.0 million line of credit with US Bank was established on June 2019 and expires on September 28, 2021. At December 31, 2020 and December 31, 2019 the Corporation had no outstanding balances against this line. The following table summarizes activities in other borrowings for the periods indicated: Year Ended December 31, 2020 2019 (Dollars in thousands) Average balance outstanding $ 251 $ 229 Weighted average rate 0.16 % 0.63 % Maximum amount outstanding at any month-end during the year $ 5,000 $ 10,000 Balance outstanding at end of year — — Weighted average interest rate at year-end — % — %

Subordinated Debentures

Subordinated Debentures	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Subordinated Debentures	Subordinated Debentures As of December 31, 2020, the Company had five subordinated notes and two junior subordinated debt securities, with an aggregate carrying value of $501.5 million and a weighted interest rate of 5.38%, compared to $215.1 million with a weighted interest rate of 5.37% at December 31, 2019. The increase of $286.4 million is primarily driven by the issuance in June 2020 of $150.0 million in aggregate principal amount of the Company's 5.375% Fixed-to-Floating Rate Subordinated Notes (the “Notes III”) due June 15, 2030, as well as the $135.0 million aggregate principal amount of subordinated notes assumed by the Bank in connection with the acquisition of Opus in the second quarter of 2020. In August 2014, the Corporation issued $60.0 million in aggregate principal amount of 5.75% Subordinated Notes Due 2024 (the “Notes I”) in a private placement transaction to institutional accredited investors (the “Private Placement”). The Notes I bear interest at an annual fixed rate of 5.75%, with the first interest payment on the Notes made on March 3, 2015, and interest payable semiannually each March 3 and September 3 through September 3, 2024. At December 31, 2020, the carrying value of the Notes was $59.6 million, net of unamortized debt issuance costs of $448,000. The Notes can only be redeemed, in whole or in part, prior to the maturity date if the notes do not constitute Tier 2 Capital (for purposes of capital adequacy guidelines of the Board of Governors of the Federal Reserve). Principal and interest are due upon early redemption. As of December 31, 2020, 60% of the Notes I qualify as Tier 2 Capital as the remaining maturity is less than four years pursuant to regulatory capital rule. In May 2019, the Corporation issued $125.0 million in aggregate principal amount of 4.875% Fixed-to-Floating Rate Subordinated Notes due May 15, 2029 (the “Notes II”), at a public offering price equal to 100% of the aggregate principal amount of the Notes II. The Corporation may redeem the Notes II on or after May 15, 2024. From and including the issue date, but excluding May 15, 2024, the Notes II will bear interest at an initial fixed rate of 4.875% per annum, payable semi-annually. From and including May 15, 2024, but excluding the maturity date or the date of earlier redemption, the Notes II will bear interest at a floating rate equal to the then-current three-month LIBOR plus a spread of 2.50% per annum, payable quarterly in arrears. At December 31, 2020, the carrying value of the Notes II was $122.9 million, net of unamortized debt issuance cost of $2.1 million. At December 31, 2020, the Notes II qualify as Tier 2 Capital. Principal and interest are due upon early redemption at any time, including prior to May 15, 2024 at our option, in whole but not in part, under the occurrence of special events defined within the trust indenture. On June 1, 2020, in connection with the Opus acquisition, the Bank assumed $135.0 million of fixed-to-variable rate subordinated notes due July 1, 2026. The notes bear interest at a fixed rate of 5.50% per year until June 2021. After this date and for the remaining five years of the notes' term, interest will accrue at a variable rate of three-month London Interbank Offering Rate (“LIBOR”) plus 4.285%. The Bank may redeem the subordinated notes, in whole or in part, on or after July 1, 2021. At December 31, 2020, the subordinated notes qualified as Tier 2 capital for the Bank. At December 31, 2020, the carrying value of these subordinated notes was $138.4 million, which reflects purchase accounting fair value adjustments of $3.4 million. In June 2020, the Corporation issued $150.0 million aggregate principal amount of its 5.375% fixed-to-floating rate subordinated notes due 2030 (the “Notes III”) at a public offering price equal to 100% of the aggregate principal amount of the Notes III. The Corporation may redeem the Notes III on or after June 14, 2025. Interest on the Notes III accrue at a rate equal to 5.375% per annum from and including June 15, 2020 to, but excluding, June 15, 2025, payable semiannually in arrears. From and including June 15, 2025 to, but excluding, June 15, 2030 or the earlier redemption date, interest will accrue at a floating rate per annum equal to a benchmark rate, which is expected to be Three-Month Term Secured Overnight Financing Rate (“SOFR”), plus a spread of 517 basis points, payable quarterly in arrears. Principal and interest are due upon early redemption at any time, including prior to June 15, 2025 at our option, in whole but not in part, under the occurrence of special events defined within the trust indenture. At September 30, 2020, the Notes III qualified as Tier 2 capital. At December 31, 2020, the carrying value of the Notes III was $147.5 million, net of unamortized debt issuance cost of $2.5 million. In connection with the Private Placement, the Corporation obtained ratings from Kroll Bond Rating Agency (“KBRA”). KBRA assigned investment grade ratings of BBB+ and BBB for the Corporation’s senior unsecured debt and subordinated debt, respectively, and a deposit rating of A- for the Bank. The Company’s and Bank’s ratings were reaffirmed in June 2020 by KBRA following the announcement of the proposed acquisition of Opus. On April 1, 2017, as part of the HEOP acquisition, the Corporation assumed $5.2 million of floating rate junior subordinated debt securities associated with Heritage Oaks Capital Trust II. Interest is payable quarterly at three-month LIBOR plus 1.72% per annum, for an effective rate of 1.945% per annum as of December 31, 2020. At December 31, 2020, the carrying value of these debentures was $4.1 million, which reflects purchase accounting fair value adjustments of $1.1 million . The Corporation also assumed Santa Lucia Bancorp (CA) Capital Trust. The carrying value of Santa Lucia Bancorp (CA) Capital Trust was $4.0 million at December 31, 2020, which reflects purchase accounting fair value adjustments of $1.2 million. Interest is payable quarterly at three-month LIBOR plus 1.48% per annum, for an effective rate of 1.72% per annum as of December 31, 2020. These debentures are callable by the Corporation at par beginning January 1, 2012 and thereafter. On November 1, 2017, as part of the PLZZ acquisition, the Company assumed three subordinated notes totaling $25.0 million at a fixed interest rate of 7.125% payable in arrears on a quarterly basis. The notes have a maturity date of June 26, 2025 and are also redeemable in whole, or in part, from time to time beginning in June 26, 2020 at an amount equal to 103% of principal plus accrued unpaid interest. The redemption price decreases 50 basis points each subsequent year. At December 31, 2020, the carrying value of these subordinated notes was $25.1 million, which reflects purchase accounting fair value adjustments of $109,000. As of December 31, 2020, 80% of the Notes I qualify as Tier 2 Capital as the remaining maturity is less than five years pursuant to regulatory capital rule. As of December 31, 2020, the Corporation has two unconsolidated Delaware statutory trust subsidiaries, Heritage Oaks Capital Trust II and Santa Lucia Bancorp (CA) Capital Trust. Both are used as business trusts for the purpose of issuing trust preferred securities to third party investors. The junior subordinated debt was issued in connection with the trust preferred securities offerings. The Corporation is not allowed to consolidate the statutory business trusts, which were formed for the purpose of issuing junior subordinated debentures, into the Company’s Consolidated Financial Statements. The resulting effect on the Company’s consolidated financial statements is to report the Subordinated Debentures as a component of the Company’s liabilities, and its ownership interest in the trusts as a component of other assets on the Company’s Consolidated Financial Statements. For regulatory capital purposes, the trust preferred securities are included in Tier 2 capital at December 31, 2020. Provisions of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 require that if a depository institution holding company exceeds $15 billion in total consolidated assets due to an acquisition, then trust preferred securities are to be excluded from Tier 1 capital beginning in the period in which the transaction occurred. During the second quarter of 2020, the Company’s acquisition of Opus resulted in total consolidated assets exceeding $15 billion; accordingly, trust preferred securities are now excluded from the Company’s Tier 1 capital. The Company and the Bank also has subordinated debt notes that qualify as Tier 2 capital. The following table summarizes our outstanding subordinated debentures as of December 31: 2020 2019 Stated Maturity Current Interest Rate Current Principal Balance Carrying Value (Dollars in thousands) Subordinated notes Subordinated notes due 2024, 5.75% per annum September 3, 2024 5.75 % $ 60,000 $ 59,552 $ 59,432 Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter May 15, 2029 4.875 % 125,000 122,877 122,622 Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter June 15, 2030 5.375 % 150,000 147,501 — Subordinated notes due 2025, 7.125% per annum June 26, 2025 7.125 % 25,000 25,109 25,133 Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter July 1, 2026 5.50 % 135,000 138,371 — Total subordinated notes 495,000 493,410 207,187 Subordinated debt Heritage Oaks Capital Trust II (junior subordinated debt), 3-month LIBOR+1.72% January 1, 2037 1.95 % 5,248 4,121 4,054 Santa Lucia Bancorp (CA) Capital Trust (junior subordinated debt), 3-month LIBOR+1.48% July 7, 2036 1.72 % 5,155 3,980 3,904 Total subordinated debt 10,403 8,101 7,958 Total subordinated debentures $ 505,403 $ 501,511 $ 215,145 The following table summarizes activities for our subordinated debentures for the periods indicated: Year Ended December 31, 2020 2019 (Dollars in thousands) Average balance outstanding $ 377,037 $ 183,383 Weighted average rate 5.48 % 5.82 % Maximum amount outstanding at any month-end during the year 501,511 233,199 Balance outstanding at end of year 501,511 215,145 Weighted average interest rate at year-end 5.38 % 5.37 %

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following presents the components of income tax expense for the years ended December 31: 2020 2019 2018 (Dollars in thousands) Current income tax provision: Federal $ 32,129 $ 34,124 $ 19,787 State 22,743 16,415 13,178 Total current income tax provision 54,872 50,539 32,965 Deferred income tax (benefit) provision: Federal (26,554) 4,645 8,142 Effect of the Tax Act — — (1,441) State (16,068) 2,851 2,574 Total deferred income tax (benefit) provision (42,622) 7,496 9,275 Total income tax provision $ 12,250 $ 58,035 $ 42,240 A reconciliation from statutory federal income taxes, which are based on a statutory rate of 21% for 2020, 2019, and 2018, to the Company’s total effective income tax provisions for the years ended December 31 is as follows: 2020 2019 2018 (Dollars in thousands) Statutory federal income tax provision $ 15,246 $ 45,729 $ 34,803 State taxes, net of federal income tax effect 4,757 15,764 12,724 Cash surrender life insurance (1,163) (565) (582) Tax exempt interest (4,073) (1,503) (1,135) Non-deductible merger costs 703 — 375 LIHTC investments (2,259) (1,570) (761) Effect of the Tax Act — — (1,441) Stock-based compensation shortfall (windfall) tax impact 407 (728) (1,811) Effect of the CARES Act (2,636) — — Section 162(m) of the Internal Revenue Code 968 530 145 Other 300 378 (77) Total income tax provision $ 12,250 $ 58,035 $ 42,240 On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (“Tax Act”). Among other changes, the Tax Act reduced the U.S. federal corporate tax rate from 35% to 21%. The Company performed an initial assessment and reasonably estimated the effects of the Tax Act on its deferred tax amounts to be approximately $5.6 million, which was recorded as a charge to income tax expense in the fourth quarter of 2017, in accordance with SEC Staff Accounting Bulletin No. 118 (“SAB 118”). As required by SAB 118, the Company continued to reassess and refine the effects of the Tax Act on its deferred tax amounts during 2018. As a result, the Company recorded an income tax benefit of $1.4 million during the year ended December 31, 2018. As of December 31, 2018, the Company had completed the accounting for the income tax effects of the Tax Act. On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”), which among other things, provided taxpayer the ability to carry back net operating loss (“NOL”) incurred in 2018, 2019, or 2020 to each of the five tax years preceding the tax year of such loss. The Company is permitted to carryback 2018 NOL of an acquired entity, Grandpoint, to its prior tax years, which have income tax rates ranging from 34% to 35%. As a result, the Company recorded an income tax benefit of $2.6 million attributable to the Grandpoint NOL carryback during the year ended December 31, 2020. Deferred tax assets (liabilities) were comprised of the following temporary differences between the financial statement carrying amounts and the tax basis of assets at December 31: 2020 2019 (Dollars in thousands) Deferred tax assets: Accrued expenses $ 1,307 $ 2,126 Net operating loss 6,614 4,765 Allowance for credit losses, net of bad debt charge-offs 85,700 10,415 Deferred compensation 3,489 3,616 State taxes 4,395 3,746 Loan discount 32,484 11,634 Stock-based compensation 4,618 3,535 Operating lease liabilities 24,463 13,334 Federal and state credit carryovers 3,750 416 Other 1,782 — Total deferred tax assets 168,602 53,587 Deferred tax liabilities: Operating lease right-of-use assets $ (21,756) $ (12,382) Deferred FDIC gain (108) (228) Core deposit intangibles (21,828) (22,415) Loan origination costs (5,176) (4,828) Depreciation (6,551) (1,814) Unrealized gain on available for sale securities (24,127) (8,639) Other — (4,652) Total deferred tax liabilities (79,546) (54,958) Valuation allowance — — Net deferred tax asset (liabilities) $ 89,056 $ (1,371) The Company accounts for income taxes by recognizing deferred tax assets and liabilities based upon temporary differences between the amounts for financial reporting purposes and tax basis of its assets and liabilities. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. In assessing the realization of deferred tax assets, management evaluates both positive and negative evidence, including the existence of any cumulative losses in the current year and the prior two years, the forecasts of future income, applicable tax planning strategies, and assessments of current and future economic and business conditions. This analysis is updated quarterly and adjusted as necessary. Based on the analysis, the Company has determined that a valuation allowance for deferred tax assets was not required as of December 31, 2020 and December 31, 2019. Section 382 of the Internal Revenue Code imposes limitations on a corporation’s ability to use any net unrealized built in losses and other tax attributes, such as net operating loss and tax credit carryforwards, when it undergoes a 50% ownership change over a designated testing period. The Company has a Section 382 limited net operating loss carry forward of approximately $29.0 million for federal income tax purposes, which is scheduled to expire at various dates from 2026 to 2032. The Company also has a Section 382 limited net operating loss carry forward of approximately $7.0 million for California franchise tax purposes, which is scheduled to expire at various dates from 2029 to 2034 with the carryover period extension from California Assembly Bill 85 (“A.B. 85”). On June 29, 2020, A.B. 85 was signed into law, and among other changes, A.B. 85 suspends the use of the California NOL for the 2020, 2021, and 2022 tax years. For NOL incurred in tax years before 2020 for which a deduction is denied, the carryover period is extended by three years. In addition, the Company has a Section 382 limited tax credit carryforward of $3.3 million, which is scheduled to expire from 2039. The Company is expected to fully utilize the federal and California net operating loss carryforward before it expires with the application of the Section 382 annual limitation. The Company and its subsidiaries are subject to U.S. Federal income tax as well as income and franchise tax in multiple state jurisdictions. The statute of limitations related to the consolidated Federal income tax returns is closed for all tax years up to and including 2016. The expiration of the statute of limitations related to the various state income and franchise tax returns varies by state. The Company is currently not under examination in any taxing jurisdiction. A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2020 and 2019 is as follows: 2020 2019 (Dollars in thousands) Balance at January 1, $ 2,906 $ 2,906 Increases based on tax positions related to prior years 233 — Decreases related to lapse of statute of limitation (2,884) — Balance at December 31, $ 255 $ 2,906 The total amount of unrecognized tax benefits was $255,000 and $2.9 million at December 31, 2020 and 2019, respectively, and is primarily comprised of unrecognized tax benefits from an acquisition during 2017. The total amount of tax benefits that, if recognized, would favorably impact the effective tax rate was $184,000 and $0 at December 31, 2020 and 2019, respectively. The Company does not believe that the unrecognized tax benefits will change significantly within the next twelve months.

Commitments, Contingencies and

Commitments, Contingencies and Concentrations of Risk	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Concentrations of Risk	Commitments, Contingencies and Concentrations of Risk Legal Proceedings. The Company is not involved in any material pending legal proceedings, other than the legal proceedings described under Item 3, “Legal Proceedings,” and those occurring in the ordinary course of business. Management believes that none of these legal proceedings, individually or in the aggregate, will have a material adverse impact on the results of operations or financial condition of the Company. Employment Agreements. The Company has entered into a three-year employment agreement with its Chief Executive Officer (“CEO”). This agreement provides for the payment of a base salary, a bonus based upon the CEO’s individual performance and the overall performance of the Company and the Bank, provides a vehicle for the CEO’s use, reimburses club dues for clubs that are used frequently for business purposes, and provides for the payment of severance benefits upon termination under specified circumstances. Additionally, the Bank has entered into one-year employment agreements with each of the following executive officers: the Bank President and Chief Operating Officer, the Chief Financial Officer, the Chief Risk Officer, and Chief Innovation Officer. The agreements provide for the payment of a base salary, a bonus based upon the individual’s performance and the overall performance of the Company and the Bank, and provides for the payment of severance benefits upon termination under specified circumstances. The employment agreement also provides a vehicle for the Bank President and Chief Operating Officer to use. The term of each of their employment agreements automatically extends for an additional one year unless either the relevant executive on the one hand, or the Company on the other hand, gives written notice to the other party or parties hereto of such party’s or parties’ election not to extend the term, with such notice to be given not less than ninety (90) days prior to any such anniversary date, in which case the relevant employment agreement shall terminate at the conclusion of its remaining term. Availability of Funding Sources. The Company funds substantially all of the loans that it originates or purchases through deposits, internally generated funds, and/or borrowings. The Company competes for deposits primarily on the basis of rates, and, as a consequence, the Company could experience difficulties in attracting deposits to fund its operations if the Company does not continue to offer deposit rates at levels that are competitive with other financial institutions. To the extent that the Company is not able to maintain its currently available funding sources or to access new funding sources, it would have to curtail its loan production activities or sell loans and investment securities earlier than is optimal. Any such event could have a material adverse effect on the Company’s results of operations, financial condition, and cash flows.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Benefit Plans	Benefit Plans 401(k) Plan. The Bank maintains an Employee Savings Plan (the “401(k) Plan”) which qualifies under Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, employees may contribute from 1% to 99% of their compensation, up to the dollar limit imposed by the IRS for tax purposes. In 2020, 2019 and 2018, the Bank matched 100% of contributions for the first three percent contributed and 50% on the next two percent contributed. Contributions made to the 401(k) Plan by the Bank amounted to $4.1 million for 2020, $2.9 million for 2019 and $2.5 million for 2018. Pacific Premier Bancorp, Inc. 2004 Long-Term Incentive Plan (the “2004 Plan”). The 2004 Plan was approved by the Corporation’s stockholders in May 2004. The 2004 Plan authorized the granting of incentive stock options, nonstatutory stock options, stock appreciation rights, and restricted stock (collectively “Awards”) equal to 525,500 shares of the common stock of the Corporation for issuances to executive, key employees, officers, and directors. The 2004 Plan was in effect for a period of ten years starting in February 25, 2004, the date the 2004 Plan was adopted. Awards granted under the 2004 Plan were made at an exercise price equal to the fair market value of the stock on the date of grant. The Awards granted pursuant to the 2004 Plan vest at a rate of 33.3% per year. The 2004 Plan terminated in February 2014. Heritage Oaks Bancorp, Inc. 2005 Equity Based Compensation Plan (the “2005 Plan”). The 2005 Plan was acquired from Heritage Oaks Bancorp, Inc. on April 1, 2017. The 2005 Plan authorized the granting of Incentive Stock Options, Non-Qualified Stock Options, Stock Appreciation Rights, Restricted Stock Awards, Restricted Stock Units, and Performance Share Cash Only Awards. As of December 31, 2016, no further grants can be made from this plan; however, Pacific Premier assumed all unvested and unexercised awards. Pacific Premier Bancorp, Inc. 2012 Long-Term Incentive Plan (the “2012 Plan”) . The 2012 Plan was approved by the Corporation’s stockholders in May 2012. The 2012 Plan originally authorized the granting of Awards equal to 620,000 shares of the common stock of the Corporation for issuances to executives, key employees, officers, and directors. The 2012 Plan will be in effect for a period of ten years from May 30, 2012, the date the 2012 Plan was adopted. Awards granted under the 2012 Plan will be made at an exercise price equal to the fair market value of the stock on the date of grant. Awards granted to officers and employees may include incentive stock options, non-qualified stock options, restricted stock, restricted stock units, and stock appreciation rights. The awards have vesting periods ranging from one Heritage Oaks Bancorp, Inc. 2015 Equity Based Compensation Plan (the “2015 Plan”). The 2015 Plan was acquired from Heritage Oaks Bancorp, Inc. on April 1, 2017. The 2015 plan was approved by the stockholders of Heritage Oaks Bancorp, Inc. in May 2015. The 2015 Plan authorized the granting of various types of share-based compensation awards to the employees and Board of Directors such as stock options, restricted stock awards, and restricted stock units. Under the 2015 Plan and following the Corporation’s assumption of the 2015 Plan, a maximum of 630,473 shares of the Corporation’s common stock at the date of acquisition were reserved and available to be issued. Shares issued under this plan, other than stock options and stock appreciation rights, were counted against the plan on a two shares for every one share actually issued basis. Awards that were canceled, expired, forfeited, fail to vest, or otherwise resulted in issued shares not being delivered to the grantee, were made available for the issuance of future share-based compensation awards. Additionally, under this plan, no one individual was to be granted shares in aggregate that exceed more than 250,000 shares during any calendar year. The 2015 Plan is still active and the Corporation assumed all unvested and unexercised awards. The Pacific Premier Bancorp, Inc. 2004 Long-Term Incentive Plan, Heritages Oaks Bancorp, Inc. 2005 Equity Based Compensation Plan, Pacific Premier Bancorp, Inc. 2012 Long-Term Incentive Plan and the Heritage Oaks Bancorp, Inc. 2015 Equity Based Compensation Plan are collectively the “Plans.” Stock Options As of December 31, 2020, there were no options outstanding on the 2004 Plan with zero available for future awards. As of December 31, 2020, there were 13,491 options outstanding on the 2005 Plan with zero available for future awards. As of December 31, 2020, there were 279,466 options outstanding on the 2012 Plan with 2,168,227 available for future awards. As of December 31, 2020, there were 16,358 options outstanding on the 2015 Plan with 656,450 available for future awards. Below is a summary of the stock option activity in the Plans for the year ended December 31, 2020: 2020 Number of Stock Options Outstanding Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic value (in years) (Dollars in thousands) Outstanding at January 1, 2020 453,104 $ 16.26 Granted 9,538 22.22 Exercised (139,739) 19.94 Forfeited and expired (13,588) 20.85 Outstanding at December 31, 2020 309,315 $ 16.84 3.87 $ 4,480 Vested and exercisable at December 31, 2020 309,315 $ 16.84 3.87 $ 4,480 The total intrinsic value of options exercised during the years ended December 31, 2020, 2019, and 2018 was $1.7 million, $4.2 million, and $8.4 million, respectively. The amount charged against compensation expense in relation to the stock options was $8,000 for 2020, $132,000 for 2019, and $571,000 for 2018. At December 31, 2020, there was no unrecognized compensation expense related to the options. Restricted Stock Awards and Restricted Stock Units Below is a summary of the activity for restricted stock and restricted stock units in the Plans for the years ended December 31, 2020: 2020 Shares Weighted Average Grant-Date Fair Value Per Share Unvested at the beginning of the year 739,933 $ 35.11 Granted 782,450 20.02 Vested (182,497) 33.78 Forfeited (70,642) 28.85 Unvested at the end of the year 1,269,244 $ 26.35 Compensation expense for the year ended December 31, 2020, 2019, and 2018 related to the above restricted stock grants amounted to $10.8 million, $10.4 million and $8.5 million, respectively. Restricted stock awards and restricted stock units are valued at the closing stock price on the date of grant and are expensed to stock based compensation expense over the period for which the related service is performed. The total grant date fair value of awards was $15.7 million for 2020 awards. At December 31, 2020, unrecognized compensation expense related to restricted stock award and units is approximately $16.9 million, which expected to be recognized over a weighted-average period of 2.32 years. Other Plans Salary Continuation Plan. The Bank implemented a non-qualified supplemental retirement plan in 2006 (the “Salary Continuation Plan”) for certain executive officers of the Bank. The Salary Continuation Plan is unfunded. Deferred Compensation Plans. The Bank implemented a non-qualified supplemental retirement plan in 2006 (the “Supplemental Executive Retirement Plan” or “SERP”) for certain executive officers of the Bank. The Bank has acquired additional SERPs through the acquisitions of San Diego Trust Bank (“SDTB”), Independence Bank (“IDPK”) and HEOP. The SERP is unfunded. The expense incurred for the SERP for each of the last three years was $511,000, $674,000, and $827,000 resulting in a deferred compensation liability of $10.4 million and $10.8 million as of the years ended 2020 and 2019. In addition, with the acquisition of PLZZ, the Company acquired a deferred compensation plan that is unfunded and results in a deferred compensation asset and liability both in the amount of $1.7 million and $1.8 million as of the years ended December 31, 2020 and 2019. With the acquisition of Opus Bank in June 2020, the Company inherited a terminated non-qualified deferred compensation plan originally funded through the purchase of bank-owned life insurance plans. Final distributions under this plan will be made in January 2021. At December 31, 2020 the deferred compensation liability was $98,000. The amounts expensed in 2020, 2019, and 2018 for all of these plans amounted to $511,000, $674,000, and $827,000 respectively. As of December 31, 2020, 2019, and 2018, $10.4 million, $10.8 million and $10.9 million, respectively, were recorded in other liabilities on the consolidated statements of condition for each of these plans.

Financial Instruments with Off-

Financial Instruments with Off-Balance Sheet Risk	12 Months Ended
	Dec. 31, 2020
Risks and Uncertainties [Abstract]
Financial Instruments with Off-Balance Sheet Risk	Financial Instruments with Off-Balance Sheet Risk The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit in the form of originating loans or providing funds under existing lines or letters of credit. These commitments are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates and may require payment of a fee. Since many commitments are expected to expire, the total commitment amounts do not necessarily represent future cash requirements. Commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the accompanying consolidated statements of financial condition. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual or notional amount of those instruments. The Company controls credit risk of its commitments to fund loans through credit approvals, limits and monitoring procedures. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The Company evaluates each customer for creditworthiness. The Company receives collateral to support commitments when deemed necessary. The most significant categories of collateral include real estate properties underlying mortgage loans, liens on personal property, and cash on deposit with the Bank. The Company maintains an allowance for credit losses to provide for commitments related to loans associated with undisbursed loan funds and unused lines of credit. The allowance for these commitments was $31.1 million at December 31, 2020 and $3.3 million at December 31, 2019. The change in the allowance for credit losses for off-balance sheet commitments during the year ended December 31, 2020 was primarily attributable to the adoption of ASC 326 on January 1, 2020, the acquisition of Opus in June 2020, as well as the deterioration in economic forecasts employed in the Company’s CECL model. See Note 5 - Allowance for Credit Losses for additional information. The Company’s commitments to extend credit at December 31, 2020 were $1.95 billion and $1.58 billion at December 31, 2019. The 2020 balance is primarily composed of $1.52 billion of undisbursed commitments for C&I loans.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The fair value of an asset or liability is the exchange price that would be received to sell that asset or paid to transfer that liability (exit price) in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including both those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis and a non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value are discussed below. In accordance with accounting guidance, the Company groups its financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described as follows: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market. Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the fair values presented. Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates presented herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction at December 31, 2020 and 2019. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Management maximizes the use of observable inputs and attempts to minimize the use of unobservable inputs when determining fair value measurements. Estimated fair values are disclosed for financial instruments for which it is practicable to estimate fair value. These estimates are made at a specific point in time based on relevant market data and information about the financial instruments. These estimates do not reflect any premium or discount that could result from offering the Company’s entire holdings of a particular financial instrument for sale at one time, nor do they attempt to estimate the value of anticipated future business related to the instruments. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of these estimates. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following is a description of both the general and specific valuation methodologies used for certain instruments measured at fair value, as well as the general classification of these instruments pursuant to the valuation hierarchy. Investment securities – Investment securities are generally valued based upon quotes obtained from an independent third-party pricing service, which uses evaluated pricing applications and model processes. Observable market inputs, such as, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data are considered as part of the evaluation. The inputs are related directly to the security being evaluated, or indirectly to a similarly situated security. Market assumptions and market data are utilized in the valuation models. The Company reviews the market prices provided by the third-party pricing service for reasonableness based on the Company’s understanding of the market place and credit issues related to the securities. The Company has not made any adjustments to the market quotes provided by them and, accordingly, the Company categorized its investment portfolio within Level 2 of the fair value hierarchy. Interest rate swaps – The Company originates a variable rate loan and enters into a variable-to-fixed interest rate swap with the customer. The Company also enters into an offsetting swap with a correspondent bank. These back-to-back swap agreements are intended to offset each other and allow the Company to originate a variable rate loan, while providing a contract for fixed interest payments for the customer. The net cash flow for the Company is equal to the interest income received from a variable rate loan originated with the customer. The fair value of these derivatives is based on a market standard discounted cash flow approach. The Company incorporates credit value adjustments on derivatives to properly reflect the respective counterparty’s nonperformance risk in the fair value measurements of its derivatives. The Company has determined that the observable nature of the majority of inputs used in deriving the fair value of these derivative contracts fall within Level 2 of the fair value hierarchy, and the credit valuation adjustments are not significant to the overall valuation of its derivative financial instruments. As a result, the valuation of interest rate swaps is classified as Level 2 of the fair value hierarchy. Equity warrant assets – The Company acquired equity warrant assets as a result of acquisition of Opus. Opus received equity warrant assets through its lending activities as part of loan origination fees. The warrants provide the Bank the right to purchase a specific number of equity shares of the underlying company’s equity at a certain price before expiration and contain net settlement terms qualifying as derivatives under ASC Topic 815. The fair value of equity warrant assets is determined using a Black-Scholes option pricing model and are classified as Level 3 of the fair value hierarchy due to the extent of unobservable inputs. The key assumptions used in determining the fair value include the exercise price of the warrants, valuation of the underlying entity's outstanding stock, expected term, risk-free interest rate, marketability discount for private company warrants, and price volatility. The following fair value hierarchy tables present information about the Company’s assets measured at fair value on a recurring basis at the dates indicated: At December 31, 2020 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at (Dollars in thousands) Financial assets Investment securities available-for-sale: U.S. Treasury $ — $ 32,533 $ — $ 32,533 Agency — 690,386 — 690,386 Corporate — 415,308 — 415,308 Municipal bonds — 1,446,019 — 1,446,019 Collateralized mortgage obligation: residential — 513,366 — 513,366 Mortgage-backed securities: residential — 833,503 — 833,503 Total securities available-for-sale $ — $ 3,931,115 $ — $ 3,931,115 Derivative assets: Interest rate swaps $ — $ 12,053 $ — $ 12,053 Equity warrants — — 1,914 1,914 Total derivative assets $ — $ 12,053 $ 1,914 $ 13,967 Financial liabilities Derivative liabilities $ — $ 12,066 $ — $ 12,066 At December 31, 2019 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at (Dollars in thousands) Financial assets Investment securities available-for-sale: U.S. Treasury $ — $ 63,555 $ — $ 63,555 Agency — 246,358 $ — 246,358 Corporate — 151,353 $ — 151,353 Municipal bonds — 397,298 — 397,298 Collateralized mortgage obligation: residential — 9,984 — 9,984 Mortgage-backed securities: residential — 499,836 — 499,836 Total securities available-for-sale $ — $ 1,368,384 $ — $ 1,368,384 Derivative assets $ — $ 2,103 $ — $ 2,103 Financial liabilities Derivative liabilities $ — $ 2,103 $ — $ 2,103 The following table is a reconciliation of the fair value of the equity warrants that are classified as Level 3 and measured on a recurring basis as of: 2020 (Dollars in thousands) Beginning Balance as of June 1, 2020 $ 5,162 Change in fair value (1) (41) Sales (3,207) Ending balance as of December 31, 2020 $ 1,914 ______________________________ (1) The changes in fair value are included in other income on the consolidated statement of income. The following table presents quantitative information about level 3 of fair value measurements for assets measured at fair value on a recurring basis at December 31, 2020. December 31, 2020 Range Fair Value Valuation Technique(s) Unobservable Input(s) Min Max Weighted Average (Dollars in thousands) Equity warrants $ 1,914 Black-Scholes Volatility 30.00% 0.13% 6.00% 35.00% 0.36% 16.00% 31.19% 0.18% 13.51% Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Individually evaluated Loans (impaired loans prior to adoption of ASC 326) – A loan is individually evaluated for expected credit losses when it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement. Individually evaluated loans are measured based on the fair value of the underlying collateral or the discounted expected future cash flows. Collateral generally consists of accounts receivable, inventory, fixed assets, real estate, and cash. The Company measures impairment on all nonaccrual loans for which it has reduced the principal balance to the value of the underlying collateral less the anticipated selling cost. Other Real Estate Owned – OREO is initially recorded at the fair value less estimated costs to sell at the date of transfer. This amount becomes the property’s new basis. Any fair value adjustments based on the property’s fair value less estimated costs to sell at the date of acquisition are charged to the allowance for credit losses. The fair value of individually evaluated collateral dependent loans and other real estate owned were determined using Level 3 assumptions, and represents individually evaluated loan and other real estate owned balances for which a specific reserve has been established or on which a write down has been taken. For real estate loans, generally, the Company obtains third party appraisals (or property valuations) and/or collateral audits in conjunction with internal analysis based on historical experience on its individually evaluated loans and other real estate owned to determine fair value. In determining the net realizable value of the underlying collateral for individually evaluated loans, the Company will then discount the valuation to cover both market price fluctuations and selling costs, typically ranging from 7% to 10% of the collateral value, that the Company expected would be incurred in the event of foreclosure. In addition to the discounts taken, the Company’s calculation of net realizable value considered any other senior liens in place on the underlying collateral. For non-real estate loans, fair value of the loan’s collateral may be determined using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions and management’s expertise and knowledge of the client and client’s business. At December 31, 2020, the Company’s individually evaluated collateral dependent loans were evaluated based on the fair value of their underlying collateral based upon the most recent appraisals available to management. The Company completed partial charge-offs on certain individually evaluated loans based on recent real estate or property appraisals and released the related reserves during the year ended December 31, 2020. The following table presents our assets measured at fair value on a nonrecurring basis at December 31, 2020 and 2019. At December 31, 2020 Level 1 Level 2 Level 3 Total (Dollars in thousands) Financial assets Individually evaluated loans $ — $ — $ 4,077 $ 4,077 At December 31, 2019 Level 1 Level 2 Level 3 Total (Dollars in thousands) Financial assets Impaired loans $ — $ — $ 2,257 $ 2,257 The following table presents quantitative information about level 3 of fair value measurements for assets measured at fair value on a nonrecurring basis at December 31, 2020 and 2019. December 31, 2020 Range Fair Value Valuation Technique(s) Unobservable Input(s) Min Max Weighted Average (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 198 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% SBA secured by real estate (1) 746 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% Business loans secured by real estate SBA secured by real estate (2) 386 Fair value of collateral Collateral discount and cost to sell 7.00% 10.00% 9.09% Commercial loans Commercial and industrial 2,040 Fair value of collateral Collateral discount and cost to sell 7.00% 10.00% 9.06% SBA non-real estate secured 707 Fair value of collateral Collateral discount and cost to sell 7.00% 7.00% 7.00% Total individually evaluated loans $ 4,077 December 31, 2019 Range Fair Value Valuation Technique(s) Unobservable Input(s) Min Max Weighted Average (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 569 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% SBA secured by real estate (1) 408 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% Business loans secured by real estate SBA secured by real estate (2) 140 Fair value of collateral Collateral discount and cost to sell 7.00% 10.00% 7.81% Commercial loans SBA non-real estate secured 1,140 Fair value of collateral Collateral discount and cost to sell 7.00% 63.00% 15.33% Total individually evaluated loans $ 2,257 ______________________________ (1) SBA loans that are collateralized by hotel/motel real property. (2) SBA loans that are collateralized by real property other than hotel/motel real property. Fair Values of Financial Instruments The fair value estimates presented herein are based on pertinent information available to management as of the dates indicated, representing an exit price. At December 31, 2020 Carrying Level 1 Level 2 Level 3 Estimated (Dollars in thousands) Assets: Cash and cash equivalents $ 880,766 $ 880,766 $ — $ — $ 880,766 Interest-bearing time deposits with financial institutions 2,845 2,845 — — 2,845 Investments held-to-maturity 23,732 — 25,013 — 25,013 Investment securities available-for-sale 3,931,115 — 3,931,115 — 3,931,115 Loans held for sale 601 — 645 — 645 Loans held for investment, net 13,236,433 — — 13,351,092 13,351,092 Derivative asset 13,967 — 12,053 1,914 13,967 Accrued interest receivable 74,574 74,574 — — 74,574 Liabilities: Deposit accounts 16,214,177 14,587,335 1,631,047 — 16,218,382 FHLB advances 31,000 — 31,564 — 31,564 Subordinated debentures 501,511 — 544,436 — 544,436 Derivative liability 12,066 — 12,066 — 12,066 Accrued interest payable 6,569 6,569 — — 6,569 At December 31, 2019 Carrying Level 1 Level 2 Level 3 Estimated (Dollars in thousands) Assets: Cash and cash equivalents $ 326,850 $ 326,850 $ — $ — $ 326,850 Interest-bearing time deposits with financial institutions 2,708 2,708 — — 2,708 Investments held-to-maturity 37,838 — 38,760 — 38,760 Investment securities available-for-sale 1,368,384 — 1,368,384 — 1,368,384 Loans held for sale 1,672 — 1,821 — 1,821 Loans held for investment, net 8,722,311 — — 8,691,019 8,691,019 Derivative asset 2,103 — 2,103 — 2,103 Accrued interest receivable 39,442 39,442 — — 39,442 Liabilities: Deposit accounts 8,898,509 7,850,667 1,048,583 — 8,899,250 FHLB advances 517,026 — 517,291 — 517,291 Subordinated debentures 215,145 — 237,001 — 237,001 Derivative liability 2,103 — 2,103 — 2,103 Accrued interest payable 2,686 2,686 — — 2,686 The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share In February 2019, the Company’s Compensation Committee of Board of Directors reviewed the various forms of outstanding equity awards, including restricted stock awards and restricted stock units (“RSUs”), and approved that unvested restricted stock awards will be considered participating securities. As a result of the different treatment of unvested restricted stock and unvested RSUs, beginning in 2019, earnings per common share is computed using the two-class method. Under the two-class method, distributed and undistributed earnings allocable to participating securities are deducted from net income to determine net income allocable to common shareholders, which is then used in the numerator of both basic and diluted earnings per share calculations. Basic earnings per common share is computed by dividing net income allocable to common shareholders by the weighted average number of common shares outstanding for the reporting period, excluding outstanding participating securities. Diluted earnings per common share is computed by dividing net income allocable to common shareholders by the weighted average number of common shares outstanding over the reporting period, adjusted to include the effect of potentially dilutive common shares, but excludes awards considered participating securities. The computation of diluted earnings per common share excludes the impact of the assumed exercise or issuance of securities that would have an anti-dilutive effect. The following tables set forth the Company’s earnings per share calculations for the periods indicated: For the Year Ended December 31, 2020 2019 2018 (Dollars in thousands, except per share data) Basic Net income $ 60,351 $ 159,718 $ 123,340 Less: Dividends and earnings allocated to participating securities (798) (1,650) — Net income allocated to common stockholders $ 59,553 $ 158,068 $ 123,340 Weighted average common shares outstanding 79,209,560 60,339,714 53,963,047 Basic earnings per common share $ 0.75 $ 2.62 $ 2.29 Diluted Net income allocated to common stockholders $ 59,553 $ 158,068 $ 123,340 Weighted average common shares outstanding 79,209,560 60,339,714 53,963,047 Dilutive effect of share-based compensation 287,513 352,567 650,010 Dilutive effect of stock warrants 9,201 — — Weighted average diluted common shares 79,506,274 60,692,281 54,613,057 Diluted earnings per common share $ 0.75 $ 2.60 $ 2.26

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments From time to time, the Company enters into interest rate swap agreements with certain borrowers to assist them in mitigating their interest rate risk exposure associated with the loans they have with the Company. At the same time, the Company enters into identical interest rate swap agreements with another financial institution to mitigate the Company’s interest rate risk exposure associated with the swap agreements it enters into with its borrowers. At December 31, 2020, the Company had over-the-counter derivative instruments and centrally-cleared derivative instruments with matched terms with an aggregate notional amount of $145.2 million and a fair value of $14.0 million. At December 31, 2019, the Company had derivative instruments with an aggregate notional amount of $76.3 million and a fair value of $2.1 million. The fair value of these agreements are determined through a third party valuation model used by the Company’s counterparty bank, which uses observable market data such as cash LIBOR rates, prices of Eurodollar future contracts and market swap rates. The fair values of these swaps are recorded as components of other assets and other liabilities in the Company’s consolidated balance sheet. Changes in the fair value of these swaps, which occur due to changes in interest rates, are recorded in the Company’s income statement as a component of noninterest income. Over-the-counter contracts are tailored to meet the needs of the counterparties involved and, therefore, generally contain a greater degree of credit risk and liquidity risk than centrally-cleared contracts, which have standardized terms. Although changes in the fair value of swap agreements between the Company and borrowers and the Company and other financial institutions offset each other, changes in the credit risk of these counterparties may result in a difference in the fair value of the swap agreements. Offsetting over-the-counter swap agreements the Company has with other financial institutions are collateralized with cash, and swap agreements with borrowers are secured by the collateral arrangements for the underlying loans these borrowers have with the Company. All interest rate swap agreements entered into by the Company are free-standing derivatives and are not designated as hedging instruments. The Company’s credit derivatives result from entering into credit risk participation agreements (“RPAs”) with a counterparty bank (Opus) during the first quarter of 2020 to accept a portion of the credit risk on interest rate swaps related to loans. RPAs provide credit protection to the financial institution should the borrower fail to perform on its interest rate swap derivative contract with the financial institution. The credit risk related to these credit derivatives is managed through the Company’s loan underwriting process. RPAs are derivative financial instruments not designated as hedging and are recorded at fair value. Changes in fair value are recognized as a component of noninterest income with a corresponding offset within other assets or other liabilities. As the result of the acquisition of Opus, the RPAs were terminated in the second quarter 2020. The Company acquired equity warrant assets as a result of acquisition of the Opus. Opus received equity warrant assets through its lending activities, which were accounted for as loan origination fees. The warrants provide the Bank the right to purchase a specific number of equity shares of the underlying company’s equity at a certain price before expiration and contain net settlement terms qualifying as derivatives under ASC Topic 815. The Company no longer has loans associated with these borrowers. Changes in fair value are recognized as a component of noninterest income with a corresponding offset within other assets. The total fair value of the warrants held in private companies was $1.9 million in other assets as of December 31, 2020. The following tables summarize the Company’s derivative instruments, included in “other assets” and “other liabilities” in the consolidated statements of financial condition. December 31, 2020 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 145,181 $ 12,053 $ 145,181 $ 12,066 Equity warrants — 1,914 — — Total derivative instruments $ 145,181 $ 13,967 $ 145,181 $ 12,066 December 31, 2019 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 76,314 $ 2,103 $ 76,314 $ 2,103 Total derivative instruments $ 76,314 $ 2,103 $ 76,314 $ 2,103 The following table summarizes the effect of the derivative financial instruments in the consolidated statements of income. For the Year Ended December 31, Derivative Not Designated as Hedging Instruments: Location of Gain Recognized in Income on Derivative Instruments 2020 2019 2018 (Dollars in thousands) Other contracts Other income $ 494 $ — $ — Equity warrants Other income (42) — — Total $ 452 $ — $ —

Balance Sheet Offsetting

Balance Sheet Offsetting	12 Months Ended
	Dec. 31, 2020
Offsetting [Abstract]
Balance Sheet Offsetting	Balance Sheet OffsettingDerivative financial instruments may be eligible for offset in the consolidated balance sheets, such as those subject to enforceable master netting arrangements or a similar agreement. Under these agreements, the Company has the right to net settle multiple contracts with the same counterparty. The Company offers an interest rate swap product to qualified customers, which are then paired with derivative contracts the Company enters into with a counterparty bank. While derivative contracts entered into with counterparty banks may be subject to enforceable master netting agreements, derivative contracts with customers may not be subject to enforceable master netting arrangements. The Company elected to account for centrally-cleared derivative contracts on a gross basis. With regard to derivative contracts not centrally cleared through a clearinghouse, regulations require collateral to be posted by the party with a net liability position. Parties to a centrally cleared over-the-counter derivative exchange daily payments that reflect the daily change in value of the derivative. These payments are commonly referred to as variation margin and are treated as settlements of derivative exposure rather than as collateral. Financial instruments that are eligible for offset in the consolidated statements of financial condition as of December 31, 2020 are presented in the table below: December 31, 2020 Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (Dollars in thousands) Financial assets: Derivatives not designated as hedging instruments $ 12,053 $ — $ 12,053 $ — $ — $ 12,053 Total $ 12,053 $ — $ 12,053 $ — $ — $ 12,053 Financial liabilities: Derivatives not designated as hedging instruments $ 12,066 $ — $ 12,066 $ (6,140) $ (5,926) $ — Total $ 12,066 $ — $ 12,066 $ (6,140) $ (5,926) $ — (1) Represents cash collateral held with counterparty bank. December 31, 2019 Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (Dollars in thousands) Financial assets: Derivatives not designated as hedging instruments $ 2,103 $ — $ 2,103 $ — $ — $ 2,103 Total $ 2,103 $ — $ 2,103 $ — $ — $ 2,103 Financial liabilities: Derivatives not designated as hedging instruments $ 2,107 $ (4) $ 2,103 $ — $ (1,678) $ 425 Total $ 2,107 $ (4) $ 2,103 $ — $ (1,678) $ 425 (1) Represents cash collateral held with counterparty bank.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition On January 1, 2018, the Company adopted ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” and all subsequent amendments that modified ASC 606. ASC 606 requires revenue that is derived from a contract with a customer to be recognized when the Company satisfies the related performance obligations by transferring to the customer a good or service. The majority of the Company’s contracts with customers associated with revenue streams that are within the scope of ASC 606 are considered short-term in nature and can be canceled at any time by the customer or the Company without penalty, such as a deposit account agreement. These revenue streams are included in noninterest income. The Company’s principal source of revenue is interest income on loans, investment securities and other interest earning assets, all of which are not within the scope of ASC 606. The remainder of the Company’s revenue is classified as noninterest income and is earned from a variety of sources, such as custodial and other fees, service charges, gains and losses, interchange income, and other income. The following table provides a summary of the Company’s noninterest income, segregated by revenue streams within and outside the scope of ASC 606 for the periods indicated: For the Year Ended December 31, 2020 2019 2018 Within Scope (1) Out-of-Scope (2) Within Scope (1) Out-of-Scope (2) Within Scope (1) Out-of-Scope (2) (Dollars in thousands) Noninterest income: Loan servicing income $ — $ 2,028 $ — $ 1,840 $ — $ 1,445 Service charges on deposit accounts 6,712 — 5,769 — 5,128 — Other service fee income 1,554 — 1,438 — 902 — Debit card interchange income 2,526 — 3,004 — 4,326 — Earnings on bank-owned life insurance — 7,160 — 3,486 — 3,427 Net gain from sales of loans — 8,609 — 6,642 — 10,759 Net gain from sales of investment securities — 13,882 — 8,571 — 1,399 Trust custodial account fees 16,653 — — — — — Other income 3,090 9,111 1,015 3,471 1,242 2,399 Total noninterest income $ 30,535 $ 40,790 $ 11,226 $ 24,010 $ 11,598 $ 19,429 ______________________________ (1) Revenues from contracts with customers accounted for under ASC 606. (2) Revenues not within the scope of ASC 606 and accounted for under other applicable GAAP requirements. The major revenue streams by fee type that are within the scope of ASC 606 presented in the above tables are described in additional detail below: Service Charges on Deposit Accounts and Other Service Fee Income. Service charges on deposit accounts and other service fee income consists of periodic service charges on deposit accounts and transaction based fees such as those related to overdrafts, ATM charges, and wire transfer fees. The majority of these revenues are accounted for under ASC 606. Performance obligations for periodic service charges on deposit accounts are typically short-term in nature and are generally satisfied on a monthly basis, while performance obligations for other transaction based fees are typically satisfied at a point in time (which may consist of only a few moments to perform the service or transaction) with no further obligations on behalf of the Company to the customer. Periodic service charges are generally collected monthly directly from the customer’s deposit account, and at the end of a statement cycle, while transaction based service charges are typically collected at the time of or soon after the service is performed. Debit Card Interchange Income. Debit card interchange fee income consists of transaction processing fees associated with customer debit card transactions processed through a payment network and are accounted for under ASC 606. These fees are earned each time a request for payment is originated by a customer debit cardholder at a merchant. In these transactions, the Company transfers funds from the debit cardholder’s account to a merchant through a payment network at the request of the debit cardholder by way of the debit card transaction. The related performance obligations are generally satisfied when the transfer of funds is complete, which is generally a point in time when the debit card transaction is processed. Debit card interchange fees are typically received and recorded as revenue on a daily basis. Trust Custodial Account Fees. Trust custodial account fees is a revenue stream acquired in the Opus acquisition and is governed by contracts executed with Pacific Premier Trust clients to perform maintenance and custodial services for their alternative IRA investments. Fees are billed and collected on a quarterly basis and recognized commensurate with completion of the performance obligations required under the contracts. At December 31, 2020, the Company had accrued fees receivable of approximately $5.8 million, which are included in other assets in the consolidated statements of financial position. Other Income. Other noninterest income includes other miscellaneous fees, which are accounted for under ASC 606; however, much like service charges on deposit accounts, these fees have performance obligations that are very short-term in nature and are typically satisfied at a point in time. Revenue is typically recorded at the time these fees are collected, which is generally upon the completion the related transaction or service provided. Also included in other income are escrow and exchange fees from the Commerce Escrow division acquired in the Opus acquisition, which are related to agreements with customers participating in escrow transactions. Transactions under Section 1031 of the Internal Revenue Code generate exchange fees as well as escrow fees. These fees relate to services that include preparation of closing statements and custody of escrow funds. The fees are received from the sale proceeds of a relinquished property and are recognized as revenue upon closing of the escrow transaction, which is the final performance obligation. These fees totaled approximately $2.7 million for the year ended 2020. Other revenue streams that may be applicable to the Company include gains and losses from the sale of nonfinancial assets such as other real estate owned and property premises and equipment. The Company accounts for these revenue streams in accordance with ASC 610-20, which requires the Company to look to guidance in ASC 606 in the application of certain measurement and recognition concepts. The Company records gains and losses on the sale of nonfinancial assets when control of the asset has been surrendered to the buyer, which generally occurs at a specific point in time. Practical Expedient. The Company also employs a practical expedient with respect to contract acquisition costs, which are generally capitalized and amortized into expense. These costs relate to expenses incurred directly attributable to the efforts to obtain a contract. The practical expedient allows the Company to immediately recognize contract acquisition costs in current period earnings when these costs would have been amortized over a period of one year or less. At December 31, 2020 the Company did not have any material contract assets or liabilities in its Consolidated Financial Statements related to revenue streams within the scope of ASC 606, and there were no material changes in those balances during the reporting period.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	Leases The Company accounts for its leases in accordance with ASC 842, which was implemented on January 1, 2019, and requires the Company to record liabilities for future lease obligations as well as assets representing the right to use the underlying leased asset. The Company’s leases primarily represent future obligations to make payments for the use of buildings or space for its operations. Liabilities to make future lease payments are recorded in accrued expenses and other liabilities, while right-of-use assets are recorded in other assets Liabilities to make future lease payments and right-of-use assets are recorded for the Company’s operating leases and not short-term leases. These liabilities and right-of-use assets are determined based on the total contractual base rents for each lease, which include options to extend or renew each lease, where applicable, and where the Company believes it has an economic incentive to extend or renew the lease. Future contractual base rents are discounted using the rate implicit in the lease or using the Company’s estimated incremental borrowing rate if the rate implicit in the lease is not readily determinable. For leases that contain variable lease payments, the Company assumes future lease payment escalations based on a lease payment escalation rate specified in the lease or the specified index rate observed at the time of lease commencement. Liabilities to make future lease payments are accounted for using the interest method, being reduced by periodic contractual lease payments net of periodic interest accretion. Right-of-use assets for operating leases are amortized over the term of the associated lease by amounts that represent the difference between periodic straight-line lease expense and periodic interest accretion in the related liability to make future lease payments. Short-term leases are leases that have a term of 12 months or less at commencement. The Company recognizes expense for both operating leases and short-term leases on a straight-line basis. The Company’s lease expense is recorded in premises and occupancy expense in the consolidated statements of income. The following table presents the components of lease expense for the periods indicated: For the Year Ended December 31, 2020 2019 (Dollars in thousands) Operating leases $ 18,065 $ 11,685 Short-term leases 2,031 2,369 Total lease expense $ 20,096 $ 14,054 The Company assumed operating leases in the acquisition of Opus on June 1, 2020. The liabilities and related right-of-use assets recorded for the assumption of these leases was approximately $43.3 million and $42.4 million, respectively. Right-of-use assets related to the Opus acquisition reflect unfavorable lease liability adjustments of approximately $900,000. Lease liabilities for the leases assumed from Opus were measured based on the net present value of remaining future lease payments on the date of acquisition, with consideration given for options to extend or renew each lease. Remaining future lease payments were discounted at the Company’s estimated incremental borrowing rate on the date of acquisition. The following tables present supplemental information related to operating leases as of and for year ended: December 31, 2020 December 31, 2019 (Dollars in thousands) Balance Sheet: Operating lease right-of-use assets $ 76,090 $ 43,177 Operating lease liabilities 85,556 46,498 For the Year Ended December 31, 2020 2019 (Dollars in thousands) Cash Flows: Operating cash flows from operating leases 16,528 11,747 The following tables provide information related to minimum contractual lease payments and other information associated with the Company’s leases as of December 31, 2020 and December 31, 2019: 2021 2022 2023 2024 2025 Thereafter Total (Dollars in thousands) December 31, 2020 Contractual base rents (1) : Operating leases $ 21,042 $ 19,569 $ 18,361 $ 16,113 $ 10,991 $ 13,009 $ 99,085 Short-term leases 215 — — — — — 215 Total contractual base rents $ 21,257 $ 19,569 $ 18,361 $ 16,113 $ 10,991 $ 13,009 $ 99,300 Total liability to make lease payments $ 85,556 Difference in undiscounted and discounted future lease payments 13,744 Weighted average discount rate 5.73 % Weighted average remaining lease term (years) 5.3 2020 2021 2022 2023 2024 Thereafter Total (Dollars in thousands) December 31, 2019 Contractual base rents (1) : Operating leases $ 10,138 $ 10,602 $ 10,137 $ 9,055 $ 7,318 $ 7,265 $ 54,515 Short-term leases 143 7 — — — — 150 Total contractual base rents $ 10,281 $ 10,609 $ 10,137 $ 9,055 $ 7,318 $ 7,265 $ 54,665 Total liability to make lease payments $ 46,498 Difference in undiscounted and discounted future lease payments 8,167 Weighted average discount rate 6.13 % Weighted average remaining lease term (years) 5.4 (1) Contractual base rents reflect options to extend and renewals, and do not include property taxes and other operating expenses due under respective lease agreements.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Loans to the Company’s executive officers and directors are made in the ordinary course of business, in accordance with applicable regulations and the Company’s policies and procedures. At December 31, 2020, there was no related party loans outstanding. At December 31, 2019, the Company had related party loans outstanding totaling $5.5 million associated with two former Directors, John J. Carona and Michael J. Morris, who resigned pursuant to the terms of the merger agreement to acquire Opus in June 2020.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarterly Results of Operations (Unaudited) The following is a summary of selected financial data presented below by quarter for the periods indicated: First Second Third Fourth (Dollars in thousands, except per share data) For the year ended December 31, 2020: Interest income $ 123,789 $ 144,122 $ 181,991 $ 180,824 Interest expense 14,614 13,830 15,445 12,626 Provision for credit losses 25,454 160,635 4,210 1,517 Noninterest income 14,475 6,898 26,758 23,194 Noninterest expense 66,631 115,970 98,579 99,939 Income tax expense (benefit) 5,825 (40,324) 23,949 22,800 Net income (loss) $ 25,740 $ (99,091) $ 66,566 $ 67,136 Earnings (loss) per share: Basic $ 0.43 $ (1.41) $ 0.71 $ 0.71 Diluted 0.43 (1.41) 0.70 0.71 For the year ended December 31, 2019: Interest income $ 131,243 $ 132,414 $ 132,604 $ 129,846 Interest expense 19,837 21,773 20,269 16,927 Provision for credit losses 1,526 334 1,562 2,297 Noninterest income 7,681 6,324 11,430 9,801 Noninterest expense 63,577 63,936 65,336 66,216 Income tax provision 15,266 14,168 15,492 13,109 Net income $ 38,718 $ 38,527 $ 41,375 $ 41,098 Earnings per share: Basic $ 0.62 $ 0.62 $ 0.69 $ 0.69 Diluted 0.62 0.62 0.69 0.69

Parent Company Financial Inform

Parent Company Financial Information	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Parent Company Financial Information	Parent Company Financial Information The Corporation is a California-based bank holding company organized in 1997 as a Delaware corporation and owns 100% of the capital stock of the Bank, its principal operating subsidiary. The Bank was incorporated and commenced operations in 1983. Condensed financial statements of the Corporation are as follows: PACIFIC PREMIER BANCORP, INC. STATEMENTS OF FINANCIAL CONDITION (Parent company only) At December 31, 2020 2019 (Dollars in thousands) Assets Cash and cash equivalents $ 96,827 $ 13,717 Investment in subsidiaries 3,017,285 2,217,903 Other assets 1,301 1,230 Total assets $ 3,115,413 $ 2,232,850 Liabilities Subordinated debentures $ 363,140 $ 215,145 Accrued expenses and other liabilities 5,624 5,111 Total liabilities 368,764 220,256 Total stockholders’ equity 2,746,649 2,012,594 Total liabilities and stockholders’ equity $ 3,115,413 $ 2,232,850 PACIFIC PREMIER BANCORP, INC. STATEMENTS OF OPERATIONS (Parent company only) For the Year Ended December 31, 2020 2019 2018 (Dollars in thousands) Income Dividend income from the Bank $ 29,874 $ 54,118 $ — Interest income 22 51 57 Total income 29,896 54,169 57 Expense Interest expense on subordinated debentures 16,596 10,680 6,716 Compensation and benefits 3,205 3,106 2,757 Other noninterest expense 4,929 2,818 3,384 Total expense 24,730 16,604 12,857 Income (loss) before income tax provision 5,166 37,565 (12,800) Income tax benefit (6,734) (4,695) (3,680) Income (loss) before undistributed income of subsidiary 11,900 42,260 (9,120) Equity in undistributed earnings of subsidiary 48,451 117,458 132,460 Net income $ 60,351 $ 159,718 $ 123,340 PACIFIC PREMIER BANCORP, INC. SUMMARY STATEMENTS OF CASH FLOWS (Parent company only) For the Year Ended December 31, 2020 2019 2018 (Dollars in thousands) Cash flows from operating activities: Net income $ 60,351 $ 159,718 $ 123,340 Adjustments to reconcile net income to cash used in operating activities: Share-based compensation expense 10,859 10,528 9,033 Equity in undistributed earnings of subsidiary and dividends from the bank (48,451) (117,458) (132,460) Deferred income tax expense 188 42 65 Change in accrued expenses and other liabilities, net 1,149 3,131 (4,149) Change in accrued interest receivable and other assets, net (8,443) (4,826) 2,461 Net cash provided by (used in) operating activities 15,653 51,135 (1,710) Cash flows from investing activities: Cash acquired in acquisitions, net — — 2,985 Other, net — — (5,467) Net cash used in investing activities — — (2,482) Cash flows from financing activities: Redemption of junior subordinated debt securities — (18,558) — Proceeds from issuance of subordinated debt, net 147,359 122,453 — Cash dividends paid (79,901) (53,867) — Repurchase and retirement of common stock — (100,000) — Proceeds from exercise of options 1,652 2,679 1,924 Restricted stock surrendered and canceled (1,653) (3,285) (1,669) Net cash provided by (used in) financing activities 67,457 (50,578) 255 Net increase (decrease) in cash and cash equivalents 83,110 557 (3,937) Cash and cash equivalents, beginning of year 13,717 13,160 17,097 Cash and cash equivalents, end of year $ 96,827 13,717 $ 13,160

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Acquisitions	Acquisitions Acquisition of Opus Effective as of June 1, 2020, the Corporation completed the acquisition of Opus, a California-chartered state bank headquartered in Irvine, California, pursuant to a definitive agreement dated as of January 31, 2020. At closing, Opus had $8.32 billion in total assets, $5.94 billion in gross loans, and $6.91 billion in total deposits and operated 46 banking offices located throughout California, Washington, Oregon, and Arizona. As a result of the Opus acquisition, the Corporation acquired specialty lines of business, including trust and escrow services. Prior to the Opus acquisition, PENSCO Trust Company LLC, a Colorado-chartered non-depository trust company (“PENSCO”), operated as an indirect, wholly-owned subsidiary of Opus and served as a custodian for self-directed IRAs, the funds of which account owners used for self-directed investments in various alternative asset classes. Immediately following the Opus acquisition, PENSCO merged with and into the Bank and operates its custodial business under the name of Pacific Premier Trust as a division of the Bank. As of May 31, 2020, PENSCO had approximately $14.48 billion of custodial assets and approximately 44,000 client accounts. Prior to the Opus acquisition, Commerce Escrow operated as a division of Opus, offering commercial escrow services and facilitating tax-deferred commercial exchanges under Section 1031 of the Internal Revenue Code of 1986, as amended. Following the acquisition of Opus, Commerce Escrow operates as a division of the Bank, which created synergies with the Company’s existing escrow deposit business. The acquisition of Opus expands the Company’s presence in major metropolitan markets with greater operational scale, diversifies business lines, banking products and services, as well as deposit base and clients by adding a new channel of stable, low-cost deposits and fee income from Opus’s trust and escrow businesses, improves revenue, and accelerates the Company’s ability to invest in technology solutions and increase efficiencies. Pursuant to the terms of the merger agreement, the consideration paid to Opus shareholders consisted of whole shares of the Corporation’s common stock and cash in lieu of fractional shares of the Corporation’s common stock. Upon consummation of the transaction, (i) each share of Opus common stock issued and outstanding immediately prior to the effective time of the acquisition was canceled and exchanged for the right to receive 0.900 shares of the Corporation’s common stock, with cash to be paid in lieu of fractional shares at a rate of $19.31 per share, and (ii) each share of Opus Series A non-cumulative, non-voting preferred stock issued and outstanding immediately prior to the effective time of the acquisition was converted into and canceled in exchange for the right to receive that number of shares of the Corporation’s common stock equal to the product of (X) the number of shares of Opus common stock into which such share of Opus preferred stock was convertible in connection with, and as a result of, the acquisition, and (Y) 0.900, in each case, plus cash in lieu of fractional shares of the Corporation’s common stock. The Corporation issued 34,407,403 shares, net of 165,136 shares for tax withholding from Opus equity award holders, of the Corporation’s common stock valued at $21.62 per share, which was the closing price of the Corporation’s common stock on May 29, 2020, the last trading day prior to the consummation of the acquisition, and paid cash in lieu of fractional shares. The Corporation assumed Opus’s warrants and options, which represented the issuance of up to approximately 406,778 and 9,538 additional shares of the Corporation’s common stock, valued at approximately $1.8 million and $46,000, respectively, and issued substitute restricted stock units in an aggregate amount of $328,000. The value of the total transaction consideration paid amounted to approximately $749.6 million. The Opus warrants assumed by the Corporation expired unexercised on September 30, 2020 and no longer remain outstanding. The Opus options assumed by the Corporation have been fully exercised during the third quarter of 2020. May 29, 2020 Merger consideration (Dollars in thousands) Value of stock consideration paid to shareholders $ 747,458 Cash paid in lieu of fractional shares 2 Value of restricted stock awards 328 Value of options and warrants (1) 1,817 Total merger consideration $ 749,605 ______________________________ (1) The Opus warrants assumed by the Corporation expired unexercised on September 30, 2020 and no longer remain outstanding. The Opus options assumed by the Corporation have been fully exercised during the third quarter of 2020. CDI of $16.1 million, customer relationship intangible assets of $3.2 million, and goodwill of $90.2 million were recognized as a result of the acquisition. Goodwill represents the future economic benefits arising from net assets acquired that are not individually identified and separately recognized and is attributable to synergies expected to be derived from the combination of the two entities. Goodwill recognized in this transaction is not deductible for income tax purposes. The following table summarizes the estimated fair value of assets acquired and liabilities assumed of Opus as of June 1, 2020 under the acquisition method of accounting, net of purchase accounting adjustments: Identifiable net assets acquired, at fair value June 1, 2020 (Dollars in thousands) Assets acquired Cash and cash equivalents $ 937,102 Interest bearing time deposits with financial institutions 137 Investment securities 829,891 Loans 5,809,451 Allowance for credit losses (21,242) Premises and equipment 22,121 Intangible assets 19,267 Deferred tax assets 45,003 Other assets 370,304 Total assets acquired $ 8,012,034 Liabilities assumed Deposits $ 6,915,990 FHLB advances and other borrowings 213,491 Subordinated debt 138,653 Other liabilities 84,542 Total liabilities assumed 7,352,676 Total fair value of identifiable net assets 659,358 Total merger consideration 749,605 Goodwill recognized $ 90,247 The Company accounted for this transaction under the acquisition method of accounting in accordance with ASC 805, Business Combinations, which requires purchased assets and liabilities assumed and consideration exchanged to be recorded at their respective estimated fair values at the date of acquisition. The determination of estimated fair values required management to make certain estimates about discount rates, future expected cash flows, market conditions at the time of the acquisition, and other future events that are highly subjective in nature and subject to refinement for up to one year after the closing date of acquisition as additional information relative to the closing date fair values becomes available and such information is considered final, whichever is earlier. Since the acquisition, the Company has made a net adjustment of $2.6 million related to loans, deferred tax assets, other assets, and other liabilities. As of December 31, 2020, the final purchase price remains subject to final adjustments and fair value measurements remain preliminary due to the timing of the acquisition. The Company continues to review information relating to events or circumstances existing at the acquisition date and expects to finalize its analysis of the acquired assets and assumed liabilities over the next few months, but not later than one year after the acquisition. Management anticipates that this review could result in adjustments to the acquisition date valuation amounts presented herein but does not anticipate that these adjustments, if any, would be material. The Company determined the fair value of loans, intangible assets, investment securities, real property, leases, deposits, and borrowings with the assistance of third-party valuations. Loans Opus’s loan portfolio was recorded at fair value at the date of acquisition. A valuation of Opus’s loan portfolio was performed by a third party as of the acquisition date in accordance with ASC 820 to assess the fair value of the loan portfolio, considering adjustments for interest rate risk, required equity return, servicing, credit, and liquidity risk. The loan portfolio was segmented into two groups: non-PCD loans and PCD loans. The non-PCD loans were pooled based on similar characteristics, such as loan type, fixed or adjustable interest rates, payment type, index rate and caps/floors, and non-accrual status. The PCD loans were valued at the loan level with similar characteristics noted above. The fair value was calculated using a discounted cash flow analysis. The discount rate utilized to analyze fair value considered the cost of funds rate, capital charge, servicing costs, and liquidity premium, mostly based on industry standards. At the acquisition date, non-PCD loans and PCD loans had a fair value of $4.94 billion and $841.2 million, respectively, and a contractual balance of $5.05 billion and $896.5 million, respectively. In accordance with GAAP, there was no carryover of the allowance for credit losses that had been previously recorded by Opus. The Company recorded an ACL of $75.9 million through an increase to the provision for credit losses. The initial ACL for PCD loans of $21.2 million is established through an adjustment to the acquired loan balance and goodwill. Core deposit intangible The CDI on non-maturing deposits was determined by evaluating the underlying characteristics of the deposit relationships, including customer attrition, deposit interest rates and maintenance costs, and costs of alternative funding using the discounted cash flow approach. The core deposit intangibles represent the costs saved by the Company between maintaining the existing deposits and obtaining alternative funds over the life of the deposit base. Customer relationship intangible PENSCO operated as the legal custodian for its clients to provide recurring custodial services over the life of client’s custodial agreement. PENSCO could separately identify each of its customer relationships through the custodial agreement between each customer and PENSCO, as well as account-level specific information, and has a history and pattern of conducting business with them as their legal custodian. In the event that PENSCO (or its successor trust division within the Bank) were to merge, reorganize, get acquired, or change its name, the surviving entity will become the trustee or custodian of the IRAs provided that the surviving entity is authorized to serve in that capacity pursuant to the Internal Revenue Code. Accordingly, such PENSCO client relationships met the contractual or other legal rights criterion for identification as a recognizable intangible asset separate from goodwill. The fair value of the customer relationship intangible asset was determined through the use of an excess earnings model associated with the expected fee income associated with underlying client relationships. Fixed maturity deposits In determining the fair value of certificates of deposit, the cash flows of the contractual interest payments during the specific period of the certificates of deposit and scheduled principal payout were discounted to present value at market-based interest rates. FHLB advances The fair value of fixed rate Federal Home Loan Bank of San Francisco (“FHLB”) advances was determined using a discounted cash flow approach. The cash flows of the advances were projected based on scheduled payments of the fixed rate advances, factoring in prepayment fee. The cash flows were then discounted to present value using the FHLB rates as of May 29, 2020. Subordinated debt The fair value of subordinated debt was determined by using a discounted cash flow method using a market participant discount rate for similar instruments. The Company incurred $49.1 million of expenses in connection with the Opus acquisition during the year ended December 31, 2020. Merger-related expenses are included in other expense in the Company's consolidated statements of income. The following table presents certain unaudited pro forma financial information for illustrative purposes only, for the years ended December 31, 2020 and 2019 as if Opus had been acquired on January 1, 2019. This unaudited pro forma information combines the historical results of Opus with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition occurred as of the beginning of the year prior to the acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value, cost savings, or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented and the differences could be significant. Year Ended December 31, 2020 2019 (Dollar in thousands, except per share data) Net interest and other income $ 777,663 $ 778,924 Net (loss) income 67,579 251,640 Basic (loss) earnings per share 0.74 2.75 Diluted (loss) earnings per share 0.74 2.72 Grandpoint Capital, Inc. Acquisition Effective as of July 1, 2018, the Company completed the acquisition of Grandpoint, the holding company of Grandpoint Bank, a California-chartered bank, with $3.05 billion in total assets, $2.40 billion in gross loans and $2.51 billion in total deposits as of June 30, 2018. Pursuant to the terms of the merger agreement, each outstanding share of Grandpoint voting common stock and Grandpoint non-voting common stock was converted into the right to receive 0.4750 shares of the Corporation’s common stock. The value of the total transaction consideration was approximately $602.2 million, after approximately $28.1 million in aggregate cash consideration payable to holders of Grandpoint share-based compensation awards by Grandpoint. The transaction consideration represented the issuance of 15,758,089 shares of the Corporation’s common stock, valued at $38.15 per share, which was the closing price of the Corporation’s common stock on June 29, 2018, the last trading day prior to the consummation of the acquisition. Goodwill in the amount of $312.6 million was recognized in the Grandpoint acquisition. Goodwill represents the future economic benefits rising from net assets acquired that are not individually identified and separately recognized and is attributable to synergies expected to be derived from the combination of the two entities. Goodwill recognized in this transaction is not deductible for income tax purposes. The following table summarizes the estimated fair value of assets acquired and liabilities assumed of Grandpoint as of July 1, 2018 under the acquisition method of accounting: Identifiable net assets acquired, at fair value July 1, 2018 (Dollars in thousands) Assets acquired Cash and cash equivalents $ 147,551 Investment securities 392,858 Loans 2,352,717 Fixed assets 9,122 Core deposit intangible 71,943 Deferred tax assets 5,028 Other assets 97,005 Total assets acquired $ 3,076,224 Liabilities assumed Deposits $ 2,506,929 Borrowings 254,923 Other Liabilities 24,859 Total liabilities assumed 2,786,711 Total fair value of identifiable net assets 289,513 Total merger consideration paid 602,152 Goodwill recognized $ 312,639

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Quarterly Cash Dividend On January 26, 2021, the Corporation’s Board of Directors declared a quarterly cash dividend of $0.30 per share, payable on February 12, 2021 to shareholders of record on February 5, 2021. Stock Repurchase Program On January 11, 2021, the Company’s Board of Directors approved a new stock repurchase program, which authorized the repurchase up to 4,725,000 shares of its common stock, representing approximately 5% of the Company’s issued and outstanding shares of common stock and approximately $150 million of common stock as of December 31, 2020 based on the closing price of the Company’s common stock on December 31, 2020. The stock repurchase program may be limited or terminated at any time without notice. The new stock repurchase program replaces and supersedes the previous $100 million stock repurchase program approved by the Board in December 2019, which the Company announced was suspended indefinitely in March 2020. The Company had not repurchased any shares of common stock under the previous stock repurchase program.

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Description of Business	Description of Business. Pacific Premier Bancorp, Inc., a Delaware corporation organized in 1997 (the “Corporation”), is a California-based bank holding company that owns 100% of the capital stock of Pacific Premier Bank, a California-chartered commercial bank (the “Bank,” and together with the Corporation and its consolidated subsidiaries, the “Company”), the Corporation’s principal operating subsidiary. The Bank was incorporated and commenced operations in 1983. The principal business of the Company is attracting deposits from the general public and investing those deposits, together with funds generated from operations and borrowings, primarily in business loans and commercial real estate loans. At December 31, 2020, the Company had 65 full-service depository branches located in the western United States in major metropolitan markets in California, Washington, Oregon, Arizona, and Nevada. The Company also offers IRA custodial and maintenance services through its Pacific Premier Trust division, which serves as a custodian for self-directed IRAs, the funds of which account owners use for self-directed investments in various alternative asset classes. Additionally, the Company provides commercial escrow services through its Commerce Escrow division, which facilitates tax-deferred commercial exchanges under Section 1031 of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”). The Company is subject to the regulations of certain governmental agencies, and undergoes periodic examinations by those regulatory authorities.
Principles of Consolidation	Principles of Consolidation. The Consolidated Financial Statements include the accounts of the Corporation and its wholly-owned subsidiary the Bank. The Company is organized and operates as a single reporting segment, principally engaged in the commercial banking business. All significant intercompany accounts and transactions have been eliminated in consolidation.
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation. The accompanying Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States (‘’GAAP’’). Certain amounts in the financial statements and related footnote disclosures for the prior years have been reclassified to conform to the current presentation with no impact to previously reported net income or stockholders’ equity.
Use of Estimates	Use of Estimates. The preparation of Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates, and those estimates may change as new information is obtained.
Cash and Cash Equivalents	Cash and Cash Equivalents. Cash and cash equivalents include cash on hand, cash balances due from banks, and federal funds sold. Interest bearing deposits with financial institutions represent primarily cash held at the Federal Reserve Bank of San Francisco. The Board of Governors of the Federal Reserve System (“Federal Reserve”) has cash reserve requirements for depository institutions based on the amount of deposits held. At December 31, 2020, the Bank had no required balance by the Federal Reserve. The Company maintains amounts due from banks that exceed federally insured limits. The Company has not experienced any losses in such accounts.
Securities	Securities. The Company has established written guidelines and objectives for its investing activities. At the time of purchase, management designates the security as either held-to-maturity, available-for-sale or held-for-trading based on the Company’s investment objectives, operational needs, and intent. The investments are monitored to ensure that those activities are consistent with the established guidelines and objectives.
Securities Held-to-Maturity/Available-for-sale	Securities Held-to-Maturity. Investments in debt securities that management has the positive intent and ability to hold to maturity are reported at cost and adjusted for periodic principal payments and the amortization of premiums and accretion of discounts, which are recognized in interest income using the interest method over the period of time remaining to investment’s maturity. Securities Available-for-Sale. Investments in debt securities that management has no immediate plan to sell, but which may be sold in the future, are carried at fair value. Premiums and discounts are amortized using the interest method over the remaining period to the call date for premiums or contractual maturity for discounts and, in the case of mortgage-backed securities, the estimated average life, which can fluctuate based on the anticipated prepayments on the underlying collateral of the securities. Unrealized holding gains and losses, net of tax, are recorded in a separate component of stockholders’ equity as accumulated other comprehensive income. Realized gains and losses on the sales of securities are determined using the specific identification method, recorded on a trade date basis based on the amortized cost basis of the specific security and are included in noninterest income as net gain (loss) on investment securities.
Allowance for Credit Losses on Investment Securities	Allowance for Credit Losses on Investment Securities. Effective January 1, 2020, the allowance for credit losses (“ACL”) on investment securities is determined for both the held-to-maturity and available-for-sale classifications of the investment portfolio in accordance with ASC 326. For available-for-sale investment securities, the Company performs a quarterly qualitative evaluation for securities in an unrealized loss position to determine if, for those investments in an unrealized loss position, the decline in fair value is credit related or non-credit related. In determining whether a security’s decline in fair value is credit related, the Company considers a number of factors including, but not limited to: (i) the extent to which the fair value of the investment is less than its amortized cost; (ii) the financial condition and near-term prospects of the issuer; (iii) downgrades in credit ratings; (iv) payment structure of the security, (v) the ability of the issuer of the security to make scheduled principal and interest payments, and (vi) general market conditions which reflect prospects for the economy as a whole, including interest rates and sector credit spreads. If it is determined that the unrealized loss, or a portion thereof, is credit related, the Company records the amount of credit loss through a charge to provision for credit losses in current period earnings. However, the amount of credit loss recorded in current period earnings is limited to the amount of the total unrealized loss on the security, which is measured as the amount by which the security’s fair value is below its amortized cost. If it is likely the Company will be required to sell the security in an unrealized loss position, the total amount of the loss is recognized in current period earnings. Unrealized losses deemed non-credit related are recorded, net of tax, through accumulated other comprehensive income.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock. The Bank is a member of the Federal Home Loan Bank (“FHLB”) System. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are recorded as a component of interest income.
Federal Reserve Bank Stock	Federal Reserve Bank Stock. The Bank is a member of the Federal Reserve Bank of San Francisco (the “FRB”). FRB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are recorded as a component of interest income.
Loans Held for Sale	Loans Held for Sale. Loans that the Company has the intent to sell prior to maturity have been designated as held for sale at origination or when the determination is made to sell the loan. Such loans are recorded at the lower of cost or fair value. Gains or losses are recognized upon the sale of the loans on a specific identification basis. Origination fees and costs are deferred until the time of sale and are included in the calculation of the gain or loss on the sale of the loan.
Loan Servicing Assets	Loan Servicing Assets. Servicing assets are related to SBA loans sold and are recognized at the time of sale when servicing is retained with the income statement effect recorded in gains on sales of SBA loans. Servicing assets are initially recorded at fair value based on the present value of the contractually specified servicing fee, net of estimated servicing costs, over the estimated life of the loan. The Company’s servicing costs approximates the industry average servicing costs of approximately 40 basis points. The servicing assets are subsequently amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. The Company periodically evaluates servicing assets for impairment based upon the fair value of the assets as compared to their carrying amount.
Loans Held for Investment/Investor Loans Secured by Real Estate/Acquired Loans	Loans Held for Investment. Loans held for investment are loans the Company has the ability and intent to hold until their maturity. These loans are carried at amortized cost, net of discounts and premiums on acquired and purchased loans, and net deferred loan origination fees and costs. Purchase discounts and premiums and net deferred loan origination fees and costs on loans are accreted or amortized in interest income as an adjustment of yield, using the interest method, over the expected life of the loans. Amortization of deferred loan fees and costs are discontinued for loans placed on nonaccrual. Any remaining discounts, premiums, deferred fees or costs, and prepayment fees associated with loan payoffs prior to contractual maturity are included in loan interest income in the period of payoff. Loan commitment fees received to originate or purchase a loan are deferred and, if the commitment is exercised, recognized over the life of the loan using the interest method as an adjustment of yield or, if the commitment expires unexercised, recognized as income upon expiration of the commitment. The Company accrues interest on loans using the interest method and only if deemed collectible. Loans for which the accrual of interest has been discontinued are designated as nonaccrual loans. The accrual of interest on loans is discontinued when principal or interest is past due 90 days based on contractual terms of the loan or when, in the opinion of management, there is reasonable doubt as to the timely collection of principal and or interest. When loans are placed on nonaccrual status, all previously accrued and uncollected interest is promptly reversed against current period interest income, and as such an ACL for accrued interest receivable is not established. Interest income generally is not recognized on nonaccrual loans unless the likelihood of further loss is remote. Interest payments received on nonaccrual loans are applied as a reduction to the loan principal balance. Interest accruals are resumed on such loans only when they are brought current with respect to interest and principal and when, in the judgment of management, the loans are deemed to be fully collectible as to all principal and interest. Investor Loans Secured by Real Estate: • Commercial real estate non-owner-occupied - Commercial real estate (“CRE”) non-owner-occupied includes loans for which the Company holds real property as collateral, but where the borrower does not occupy the underlying property. The primary risks associated with these loans include the borrower’s inability to pay, material decreases in the value of the real estate that is being held as collateral, significant increases in interest rates, which may make the real estate loan unprofitable to the borrower, changes in market rents, and vacancy of the underlying property. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. • Multifamily - Multifamily loans are secured by multi-unit (5 or more units) residential real properties. Payments on multifamily loans are dependent on the successful operation or management of the properties, and repayment of these loans may be subject to adverse conditions in the real estate market or the economy. • Construction and land - We originate loans for the construction of one-to-four family and multifamily residences and CRE properties in our primary market area. We concentrate our efforts on single homes and small infill projects in established neighborhoods where there is not abundant land available for development. Construction loans are considered to have higher risks due to construction completion and timing risk, and the ultimate repayment being sensitive to interest rate changes, government regulation of real property, and the availability of long-term financing. Additionally, economic conditions may impact the Company’s ability to recover its investment in construction loans, as adverse economic conditions may negatively impact the real estate market, which could affect the borrower’s ability to complete and sell the project. Additionally, the fair value of the underlying collateral may fluctuate as market conditions change. We occasionally originate land loans located predominantly in California for the purpose of facilitating the ultimate construction of a home or commercial building. The primary risks include the borrower’s inability to pay and the inability of the Company to recover its investment due to a decline in the fair value of the underlying collateral. Business Loans Secured by Real Estate: • Commercial real estate owner-occupied - CRE owner-occupied includes loans for which the Company holds real property as collateral and where the underlying property is occupied by the borrower, such as with a place of business. These loans are primarily underwritten based on the cash flows of the business and secondarily on the real estate. The primary risks associated with CRE owner-occupied loans include the borrower’s inability to pay, material decreases in the value of the real estate that is being held as collateral, and significant increases in interest rates, which may make the real estate loan unprofitable to the borrower. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. • Franchise secured by real estate - Franchise real estate secured loans are business loans secured by real property occupied by franchised restaurants, generally quick-service restaurants. These loans are primarily underwritten based on the cash flows of the business and secondarily on the real estate. Risks associated with these loans include material decreases in the value of real estate being held as collateral, and the borrower’s inability to pay as a result of increases in interest rates or decreases in cash flow from the underlying business. • Small Business Administration (“SBA”) - We are approved to originate loans under the SBA’s Preferred Lenders Program (“PLP”). The PLP lending status affords us a higher level of delegated credit autonomy, translating to a significantly shorter turnaround time from application to funding, which is critical to our marketing efforts. We originate loans nationwide under the SBA’s 7(a), SBAExpress, International Trade and 504(a) loan programs, in conformity with SBA underwriting and documentation standards. SBA loans are similar to commercial business loans, but have additional credit enhancement provided by the U.S. Small Business Administration, for up to 85% of the loan amount for loans up to $150,000 and 75% of the loan amount for loans of more than $150,000. The Company originates SBA loans with the intent to sell the guaranteed portion into the secondary market on a quarterly basis. Certain loans classified as SBA are secured by commercial real estate property. SBA loans secured by hotels are included in the segment investor loans secured by real estate, and SBA loans secured by all other forms of real estate are included in the business loans secured by real estate segment. All other SBA loans are included in the commercial loans segment below, and are secured by business assets. Commercial Loans: • Commercial and industrial (including franchise commercial loans) (“C&I”) - Loans secured by business assets including inventory, receivables, and machinery and equipment to businesses located generally in our primary market area. Loan types includes revolving lines or credit, term loans, seasonal loans, and loans secured by liquid collateral such as cash deposits or marketable securities. Franchise credit facilities not secured by real estate and Home Owners’ Association (“HOA”) credit facilities are included in C&I loans. We also issue letters of credit on behalf of our customers. Risk arises primarily due to the difference between expected and actual cash flows of the borrowers. In addition, the recoverability of the Company’s investment in these loans is also dependent on other factors primarily dictated by the type of collateral securing these loans. The fair value of the collateral securing these loans may fluctuate as market conditions change. In the case of loans secured by accounts receivable, the recovery of the Company’s investment is dependent upon the borrower’s ability to collect amounts due from its customers. • SBA Paycheck Protection Program (“PPP”) loans - Federally guaranteed loans designed to assist small and medium sized businesses through the disruptions in business brought on by the Coronavirus Disease 2019 (“COVID-19”) pandemic. The Paycheck Protection Program is part of the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act that was signed into law in March 2020. The loans are designed to help businesses meet the on-going costs associated with running and maintaining a business through the COVID-19 pandemic and provide the potential for forgiveness of the loan if the borrower uses the funds for certain purposes, such as maintaining employees on payroll for a specified period of time. Additionally, the PPP allows for a deferral period until the date when the amount of loan forgiveness is determined and remitted to the lender. For borrowers who do not apply for forgiveness, the loan deferral period is 10 months after the applicable forgiveness period ends. In July 2020, the Company sold its entire SBA PPP loan portfolio with an aggregate amortized cost of $1.13 billion to a seasoned and experienced non-bank lender and servicer of SBA loans, resulting in improved balance sheet liquidity and a gain on sale of approximately of $18.9 million, net of net deferred origination fees and purchase discounts. As of December 31, 2020, the Company had no SBA PPP loans. Retail Loans: • One-to-four family - Although we do not originate traditional single family mortgages, we have acquired first lien single family loans through bank acquisitions. We also originate home equity lines of credit loans to consumers within out market area. The primary risks of one-to-four family loans include the borrower’s inability to pay, material decreases in the value of the real estate that is being held as collateral and significant increases in interest rates, which may make loans unprofitable to the borrower. • Consumer loans - In addition to consumer loans acquired through our various bank acquisitions, we originate a limited number of consumer loans, generally for banking clients only, which consist primarily of home equity lines of credit, savings account secured loans and auto loans. Repayment of these loans is dependent on the borrower’s ability to pay and the fair value of the underlying collateral. Acquired Loans. Loans acquired through a purchase or a business combination are recorded at their fair value at the acquisition date. The Company performs an assessment of acquired loans to first determine if such loans have experienced more than insignificant deterioration in credit quality since their origination and thus should be classified and accounted for as purchased credit deteriorated (“PCD”) loans. For loans that have not experienced more than insignificant deterioration in credit quality since origination, referred to as non-PCD loans, the Company records such loans at fair value, with any resulting discount or premium accreted or amortized into interest income over the remaining life of the loan using the interest method. Additionally, upon the purchase or acquisition of non-PCD loans, the Company measures and records an ACL based on the Company’s methodology for determining the ACL. The ACL for non-PCD loans is recorded through a charge to the provision for credit losses in the period in which the loans were purchased or acquired. Acquired loans that are classified as PCD are acquired at fair value, which includes any resulting discounts or premiums. Discounts and premiums are accreted or amortized into interest income over the remaining life of the loan using the interest method. Unlike non-PCD loans, the initial ACL for PCD loans is established through an adjustment to the acquired loan balance and not through a charge to the provision for credit losses in the period in which the loans were acquired. The ACL for PCD loans is determined with the use of the Company’s ACL methodology. Characteristics of PCD loans include: delinquency, downgrade in credit quality since origination, loans on nonaccrual status, loans modified in a troubled debt restructuring, and/or other factors the Company may become aware of through its initial analysis of acquired loans that may indicate there has been more than insignificant deterioration in credit quality since a loan’s origination. In connection with the Opus acquisition on June 1, 2020, the Company acquired PCD loans with an aggregate fair value of approximately $841.2 million, and recorded an ACL of approximately $21.2 million, which was added to the amortized cost of the loans. Subsequent to acquisition, the ACL for both non-PCD and PCD loans are determined with the use of the Company’s ACL methodology in the same manner as all other loans.
Allowance for Credit Losses on Loans	Allowance for Credit Losses on Loans. Effective January 1, 2020, the Company accounts for credit losses on loans in accordance with ASC 326, which requires the Company to record an estimate of expected lifetime credit losses for loans at the time of origination or acquisition. The ACL is maintained at a level deemed appropriate by management to provide for expected credit losses in the portfolio as of the date of the consolidated statements of financial condition. Estimating expected credit losses requires management to use relevant forward-looking information, including the use of reasonable and supportable forecasts. The measurement of the ACL is performed by collectively evaluating loans with similar risk characteristics. The Company measures the ACL on commercial real estate loans and commercial loans using a discounted cash flow approach, and a historical loss rate methodology is used to determine the ACL on retail loans. The Company’s discounted cash flow methodology incorporates a probability of default and loss given default, as well as expectations of future economic conditions, using reasonable and supportable forecasts. Together, the probability of default and loss given default model with the use of reasonable and supportable forecasts generate estimates for cash flows expected to be collected over the estimated life of a loan. Estimates of future expected cash flows ultimately reflect assumptions made concerning net credit losses over the life of a loan. The use of reasonable and supportable forecasts requires significant judgment, such as selecting a forecast scenario, or the use of multiple forecast scenarios and the related scenario-weighting, as well as determining the appropriate length of the forecast horizon. Management leverages economic projections from a reputable and independent third party to inform and provide its reasonable and supportable economic forecasts. Other internal and external indicators of economic forecasts may also be considered by management when developing the forecast metrics. The Company’s ACL model reverts to long-term average loss rates for purposes of estimating expected cash flows beyond a period deemed reasonable and supportable. The Company forecasts economic conditions and expected credit losses over a two-year time horizon before reverting to long-term historical average loss rates over a period of three years. The duration of the forecast horizon, the period over which forecasts revert to long-term averages, the economic forecasts that management utilizes, as well as additional internal and external indicators of economic forecasts that management considers, may change over time depending on the nature and composition of our loan portfolio. Changes in economic forecasts, in conjunction with changes in loan specific attributes, impact a loan’s probability of default and loss given default, which can drive changes in the determination of the ACL. Expectations of future cash flows are discounted at the loan’s effective interest rate. The resulting ACL represents the amount by which the loan’s amortized cost exceeds the net present value of a loan’s discounted cash flows. The ACL is recorded through a charge to provision for credit losses and is reduced by charge-offs, net of recoveries on loans previously charged-off. It is the Company’s policy to promptly charge-off loan balances at the time they have been deemed uncollectable. The Company’s ACL model also includes adjustments for qualitative factors, where appropriate. Since historical information (such as historical net losses and economic cycles) may not always, by itself, provide a sufficient basis for determining future expected credit losses, the Company periodically considers the need for qualitative adjustments to the ACL. Qualitative adjustments may be related to and include, but not limited to factors such as: (i) management’s assessment of economic forecasts used in the model and how those forecasts align with management’s overall evaluation of current and expected economic conditions, (ii) organization specific risks such as credit concentrations, collateral specific risks, regulatory risks, and external factors that may ultimately impact credit quality, (iii) potential model limitations such as limitations identified through back-testing, and other limitations associated with factors such as underwriting changes, acquisition of new portfolios and changes in portfolio segmentation, and (iv) management’s overall assessment of the adequacy of the ACL, including an assessment of model data inputs used to determine the ACL. The Company has a credit portfolio review process designed to detect problem loans. Problem loans are typically those of a substandard or worse internal risk grade, and may consist of loans on nonaccrual status, troubled debt restructurings (“TDRs”), loans where the likelihood of foreclosure on underlying collateral has increased, collateral dependent loans and other loans where concern or doubt over the ultimate collectability of all contractual amounts due has become elevated. Such loans, which have exhibited a deterioration in credit quality may, in the opinion of management, be deemed to no longer possess risk characteristics similar to other loans in the loan portfolio, because the specific attributes and risks associated with the loan have likely become unique as the credit quality of the loan deteriorates. As such, these loans may require individual evaluation to determine an appropriate ACL for the loan. When a loan is individually evaluated, the Company typically measures the expected credit loss for the loan based on a discounted cash flow approach, unless the loan has been deemed collateral dependent. Collateral dependent loans are loans where the repayment of the loan is expected to come from the operation of and/or eventual liquidation of the underlying collateral. The ACL for collateral dependent loans is determined using estimates for the fair value of the underlying collateral, less costs to sell. Although management uses the best information available to derive estimates necessary to measure an appropriate level of ACL, future adjustments to the ACL may be necessary due to economic, operating, regulatory, and other conditions that may extend beyond the Company’s control. Additionally, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s ACL and credit review process. Such agencies may require the Company to recognize additions to the ACL based on judgments different from those of management. Please also see Note 5 - Allowance for Credit Losses , of these Consolidated Financial Statements for additional discussion concerning the Company’s ACL methodology.
Troubled Debt Restructurings	Troubled Debt Restructurings. From time-to-time, the Company makes modifications to certain loans when a borrower is experiencing financial difficulty. These modifications are made to alleviate temporary impairments in the borrower’s financial condition and/or constraints on the borrower’s ability to repay the loan, and to minimize potential losses to the Company. Modifications typically include: changes in the amortization terms of the loan, reductions in interest rates, acceptance of interest only payments, and, in limited cases, reductions to the outstanding loan balance. Such loans are typically placed on nonaccrual status and are returned to accrual status when all contractual amounts past due have been brought current, the loan has performed under the modified terms of the loan agreement for a period of at least six months, and the ultimate collectability of all contractual amounts due under the modified terms of the loan agreement is no longer in doubt. The Company typically measures the ACL for TDRs on an individual basis when the loans are deemed to no longer share similar risk characteristics with other loans in the portfolio. The determination of the ACL for TDRs is based on a discounted cash flow approach for both those measured collectively and individually, unless the loan is deemed collateral dependent, which requires measurement of the ACL based on the fair value of the collateral less cost to sell.
Allowance for Loan Losses	Allowance for Loan Losses. Prior to the Company’s adoption of ASC 326 on January 1, 2020, the Company maintained an allowance for loan and leases losses (“ALLL”) in accordance with ASC 450, Contingencies and ASC 310, Receivables . The ALLL was maintained at a level deemed appropriate by management to provide for known or probable incurred losses in the portfolio as of the date of the consolidated statements of financial condition. Management’s determination of the adequacy of the ALLL was based on an evaluation of the composition of the portfolio, actual historical loss experience, industry charge-off experience on income property loans, current economic conditions and other relevant factors in the area in which the Company’s lending and real estate activities are based. These factors may affect a borrower’s ability to pay as well as the value of the underlying collateral securing loans. The allowance was calculated by applying loss factors to loans held for investment according to loan type and loan credit classification. The loss factors were based primarily upon the Bank’s historical loss experience and industry charge-off experience, and were evaluated on a quarterly basis. Loan credit classifications were based on an internal loan review system, which was designed to provide for the detection of problem loans and assign an appropriate level of ALLL to them. The ALLL was periodically adjusted to reflect the estimated potential impact that relevant internal and external factors may have had on losses inherent in the loan portfolio. These factors typically consisted of: • Changes in lending policies and procedures, including underwriting standards and collection, charge-offs, and recovery practices; • Changes in the nature and volume of the loan portfolio, including new types of lending; • Changes in the experience, ability, and depth of lending management and other relevant staff that may have an impact on our loan portfolio; • Changes in the volume and severity of adversely classified or graded loans; • Changes in the quality of our loan review system and the management oversight; • The existence and effect of any concentrations of credit and changes in the level of such concentrations; • Changes in national, regional, and local economic conditions, including trends in real estate values and the interest rate environment; • Changes in the value of the underlying collateral for collateral-dependent loans; and • The effect of external factors, such as competition, legal developments, and regulatory requirements on the level of estimated credit losses in our current loan portfolio.
Impaired Loans/Purchased Credit Impaired Loans	Impaired Loans. Prior to the Company’s adoption of ASC 326 on January 1, 2020, the Company classified a loan as impaired when it was probable that the Company would be unable to collect all amounts due (principal and interest) according to the contractual terms of the loan agreement. The Company reviewed loans for impairment when the loan was classified as substandard or worse, delinquent 90 days, determined by management to be collateral dependent, or when the borrower filed bankruptcy or was granted a concession which qualified as a troubled debt restructuring. Measurement of impairment was based on the amount by which a loan’s carrying value exceeds its expected future cash flows discounted at the loan’s effective interest rate, an observable market value, if one exists, or the fair value of the collateral if the loan was deemed collateral dependent. Impairment was recorded through the provision for loan losses. The Company measured impairment on a loan-by-loan basis, and generally charged-off specific reserves for impaired loans at such time the loan was classified as a loss.
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial Instruments. Financial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recognized in the Consolidated Financial Statements when they are funded.
Other Real Estate Owned	Other Real Estate Owned. Real estate properties acquired through, or in lieu of, loan foreclosure are recorded at fair value, less cost to sell, with any excess of the loan’s amortized cost balance over the fair value of the property recorded as a charge against the ACL. The Company obtains an appraisal and/or market valuation on all other real estate owned at the time of possession. After foreclosure, valuations are periodically performed by management. Any subsequent declines in fair value are recorded as a charge to non-interest expense in current period earnings with a corresponding write-down to the asset. All legal fees and direct costs, including foreclosure and other related costs, are expensed as incurred.
Premises and Equipment	Premises and Equipment. Premises and equipment are carried at cost less accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets, which range from thirty years for buildings, seven years for furniture, fixtures and equipment, and three years for computer and telecommunication equipment. The cost of leasehold improvements is amortized using the straight-line method over the shorter of the estimated useful life of the asset or the term of the related leases. The Company periodically evaluates the recoverability of long-lived assets, such as premises and equipment, to ensure the carrying value has not been impaired. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell.
Bank Owned Life Insurance (“BOLI”)	Bank Owned Life Insurance (“BOLI”). BOLI assets are life insurance policies on certain current and former officers, directors and employees for which the Bank is the beneficiary under each policy. BOLI is accounted for using the cash surrender value method and is recorded at its realizable value as an asset on the consolidated statements of financial condition. Changes in the cash surrender value of BOLI and the death benefits of an insured individual covered by these policies, after distribution to the insured’s beneficiaries, if any, are recorded as tax-exempt noninterest income on the consolidated statements of income.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets. Goodwill is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have indefinite useful lives are not amortized, but tested for impairment at least annually or more frequently if events and circumstances lead management to believe the value of goodwill may be impaired. Impairment testing is performed at the reporting unit level, which is considered the Company level as management has identified the Company is its sole reporting unit as of December 31, 2020. Management’s assessment of goodwill is performed in accordance with ASC 350-20 - Goodwill and Other - Goodwill , which allows the Company to first perform a qualitative assessment of goodwill to determine if it is more likely than not the fair value of the Company’s equity is below its carrying value. However, GAAP also allows the Company, at its option, to unconditionally forego the qualitative assessment and proceed directly to a quantitative assessment. When performing a qualitative assessment of goodwill, should the results of such analysis indicate it is more likely than not the fair value of the Company’s equity is below its carrying value, the Company then performs the quantitative assessment of goodwill to determine the fair value of the reporting unit and compares it to its carrying value. If the fair value of the reporting unit is below its carrying value, the Company would then recognize the amount of impairment as the amount by which the reporting unit’s carrying value exceeds its fair value, limited to the total amount of goodwill allocated to the reporting unit. Impairment losses are recorded as a charge to noninterest expense. The Company typically performs its annual impairment testing in the fourth quarter. GAAP allows the Company to make an unconditional election to forego a qualitative assessment of goodwill and proceed directly to the quantitative assessment of goodwill. The Company made such election when testing goodwill for impairment in the fourth quarter of 2020. The results of this analysis indicated the estimated fair value of the Company’s equity exceeded its carrying value and that the value of goodwill assets could be supported and were not impaired. As of December 31, 2020, goodwill is the only intangible asset with an indefinite life recorded in the Company’s consolidated statements of financial condition. Other intangible assets include core deposit and customer relationship intangibles arising from whole bank acquisitions and are amortized on a basis reflecting the pattern in which the economic benefits of the intangible asset are expected to be consumed or otherwise used up, or on a straight-line basis over their estimated useful lives, which ranges from six
Business Combinations	Business Combinations . The company accounts for business combinations under the acquisition method of accounting. Upon obtaining control of the acquired entity, the Company records all identifiable assets and liabilities at their estimated fair values. Goodwill is recorded when the consideration paid for an acquired entity exceeds the estimated fair value of the net assets acquired. Changes to the acquisition date fair values of assets acquired and liabilities assumed may be made as adjustments to goodwill over a 12-month measurement period following the date of acquisition. Such adjustments are attributable to additional information obtained related fair value estimates of the assets acquired and liabilities assumed. Certain costs associated with business combinations are expensed as incurred.
Subordinated Debentures	Subordinated Debentures. Long-term borrowings are carried at cost, adjusted for amortization of premiums and accretion of discounts, which are recognized in interest expense using the interest method. Debt issuance costs are recognized in interest expense using the interest method over the life of the instrument.
Leases	Leases . The Company accounts for its leases in accordance with ASC 842 - Leases , which requires the Company to record liabilities for future lease obligations as well as assets representing the right to use the underlying leased asset. Leases with a term of 12 months or less are accounted for using straight-line expense recognition with no liability to make future lease payments or right-of-use asset being recorded for such leases. Other than short-term leases, the Company classifies its leases as either finance leases or operating leases. Leases are classified as finance leases when any of the following are met: (a) the lease transfers ownership of the underlying asset to the lessee by the end of the lease term, (b) the lease contains an option to purchase the underlying asset that the lessee is reasonably certain to exercise, (c) the term of the lease represents a major part of the remaining life of the underlying asset, (d) the present value of the future lease payments equals or exceeds substantially all of the fair value of the underlying asset, or (e) the underling leased asset is expected to have no alternative use to the lessor at the end of the lease term due to its specialized nature. When the Company’s assessment of a lease does not meet the foregoing criteria, and the term of the lease is in excess of 12 months, the lease is classified as an operating lease. Liabilities to make lease payments and right-of-use assets are determined based on the total contractual base rents for each lease, discounted at the rate implicit in the lease or at the Company’s estimated incremental borrowing rate if the rate is not implicit in the lease. The Company measures future base rents based on the minimum payments specified in the lease agreement from the date the lease commences, giving consideration for periodic contractual rent increases, which are based on an escalation rate or a specified index. When future rent payments are based on an index, the Company uses the index rate observed at the time of lease commencement to measure future lease payments. Liabilities to make lease payments are accounted for using the interest method, which are reduced by periodic rent payments, net of interest accretion. Right-of-use assets for finance leases are amortized on a straight-line basis over the term of the lease, while right-of-use assets for operating leases are amortized over the term of the lease by amounts that represent the difference between periodic straight-line lease expense and periodic interest accretion on the related liability to make lease payments. Expense recognition for finance leases is representative of the sum of periodic amortization of the associated right-of-use asset as well as the periodic interest accretion on the liability to make lease payments. Expense recognition for operating leases is recorded on a straight-line basis. As of December 31, 2020, all of the Company’s leases were classified as either operating leases or short-term leases. From time to time the Company leases portions of the space it leases to other parties through sublease transactions. Income received from these transactions is recorded on a straight-line basis over the term of the sublease.
Revenue Recognition	Revenue Recognition . The Company accounts for certain of its revenue streams deemed to arise from contracts with customers in accordance with ASC 606 - Revenue from Contracts with Customers . Revenue streams within the scope of and accounted for under ASC 606 include: service charges and fees on deposit accounts, debit card interchange fees, custodial account fees, fees from other services the Bank provides its customers, and gains and losses from the sale of other real estate owned and property, premises and equipment. ASC 606 requires revenue to be recognized when the Company satisfies related performance obligations by transferring to the customer a good or service. The recognition of revenue under ASC 606 requires the Company to first identify the contract with the customer, identify the performance obligations, determine the transaction price, allocate the transaction price to the performance obligations, and finally recognize revenue when the performance obligations have been satisfied and the good or service has been transferred. The majority of the Company’s contracts with customers associated with revenue streams that are within the scope of ASC 606 are considered short-term in nature and can be canceled at any time by the customer or the Bank, such as a deposit account agreement. Other more significant revenue streams for the Company, such as interest income on loans and investment securities, are specifically excluded from the scope of ASC 606 and are accounted for under other applicable GAAP.
Stock-Based Compensation	Stock-Based Compensation. The Company issues various forms of stock-based compensation awards annually to officers and directors of the Company, including stock options, restricted stock awards, and restricted stock units. The related compensation costs are recognized in the income statement based on the grant-date fair value over the period they are expected to vest, net of estimates for forfeitures. Estimates for forfeitures are based on the Company’s historical experience for each award type. A Black-Scholes model is utilized to estimate the fair value of stock options on the grant date. The Black-Scholes model uses certain assumptions to determine grant-date fair value such as: expected volatility, expected term of the option, expected risk-free rate of interest, and expected dividend yield on the Corporation’s common stock. The market price of the Corporation’s common stock at the grant-date is used for restricted stock awards in determining the grant-date fair value for those awards. Restricted stock awards and restricted stock units are granted to officers of the Company, and represent stock-based compensation awards that when ultimately settled, result in the issuance of shares of the Corporation’s common stock to the grantee. As with other stock-based compensation awards, compensation cost for restricted stock awards and restricted stock units is recognized over the period in which the awards are expected to vest. Certain of the Corporation’s restricted stock units contain vesting conditions which are based on pre-determined performance targets. The level at which the associated performance targets are achieved can impact the ultimate settlement of the award with the grantee and thus the level of compensation expense ultimately recognized. Certain of these awards contain a market-based condition whereby the vesting of the award is based on the Company’s performance, such as total shareholder return, relative to its peers over a specified period of time. The grant date fair value of market-based restricted stock units is determined through the use of an independent third party which employs the use of a Monte Carlo simulation. The Monte Carlo simulation estimates grant date fair value using input assumptions similar to those used in the Black-Scholes model, however, it also incorporates into the grant date fair value calculation the probability that the performance targets will be achieved. The grant date fair value of restricted stock units that do not contain a market-based condition for vesting is based on the price of the Corporation’s common stock on the grant date. Holders of restricted stock awards are entitled to receive cash dividends. Holders of restricted stock units are entitled to receive dividend equivalents during the vesting period commensurate with dividends declared and paid on the Corporation’s common stock. As restricted stock awards contain rights to receive non-forfeitable dividends prior to the awards being vested, such awards are considered participating securities.
Income Taxes	Income Taxes. Deferred tax assets and liabilities are recorded for the expected future tax consequences of events that have been recognized in the Company’s financial statements or tax returns using the asset liability method. In estimating future tax consequences, all expected future events other than enactments of changes in the tax law or rates are considered. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax assets are recognized for temporary differences that will result in deductible amounts in future years and for tax carryforwards if, in the opinion of management, it is more likely than not that the deferred tax assets will be realized. At December 31, 2020 and 2019, no valuation allowance was deemed necessary against the Company’s deferred tax assets. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Company recognizes interest and / or penalties related to income tax matters in income tax expense.
Earnings per Share	Earnings per Share. Earnings per share of common stock is calculated on both a basic and diluted basis, based on the weighted average number of common and common equivalent shares outstanding. Basic earnings per share excludes potential dilution from common equivalent shares, such as those associated with stock-based compensation awards, and is computed by dividing net income allocated to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock, such as common equivalent shares associated with stock-based compensation awards, were exercised or converted into common stock that would then share in the net earnings of the Corporation. Potential dilution from common equivalent shares is determined using the treasury stock method, reflecting the potential settlement of stock-based compensation awards resulting in the issuance of additional shares of the Corporation’s common stock. Stock-based compensation awards that would have an anti-dilutive effect have been excluded from the determination of earnings per common share. Restricted stock awards are deemed participating securities by the Corporation, and therefore the Corporation computes earnings per common share using the two-class method. Under the two-class method, distributed and undistributed net earnings allocable to participating securities are deducted from net income to determine net income allocable to common shareholders, which is then used in the numerator of both basic and diluted earnings per share calculations. Participating securities are excluded from the denominator of both basic and diluted earnings per common share.
Comprehensive Income	Comprehensive Income. Comprehensive income is reported in addition to net income for all periods presented. Comprehensive income is a more inclusive financial reporting methodology that includes disclosure of other comprehensive income (loss) that historically has not been recognized in the calculation of net income. Unrealized gains and losses on the Company’s available-for-sale investment securities are required to be included in other comprehensive income or loss. Total comprehensive income (loss) and the components of accumulated other comprehensive income or loss are presented in the Consolidated Statements of Stockholders’ Equity and Consolidated Statements of Comprehensive Income.
Loss Contingencies	Loss Contingencies. Loss contingencies, including claims and legal action arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there now are such matters that will have a material effect on the financial statements.
Fair Value of Financial Instruments	Fair Value of Financial Instruments. Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in Note 19 - Fair Value of Financial Instruments . Fair value is an exit price, representing the amount that would be received to sell an asset or transfer a liability in an orderly transaction between market participants. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Fair value measures are classified according to a three-tier fair value hierarchy, which is based on the observability of inputs used to measure fair value. GAAP requires the Company to maximize the use of observable inputs when measuring fair value. When observable market prices or inputs are not available, the Company estimates fair value using modeling techniques such as a discounting future cash flows. Such a technique uses assumptions that market participants would consider in determining the fair value of the financial asset or liability. Changes in assumptions or in market conditions could significantly affect fair value estimates. The fair value of an asset or liability is the exchange price that would be received to sell that asset or paid to transfer that liability (exit price) in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including both those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis and a non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value are discussed below. In accordance with accounting guidance, the Company groups its financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described as follows: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market. Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the fair values presented. Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates presented herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction at December 31, 2020 and 2019. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Management maximizes the use of observable inputs and attempts to minimize the use of unobservable inputs when determining fair value measurements. Estimated fair values are disclosed for financial instruments for which it is practicable to estimate fair value. These estimates are made at a specific point in time based on relevant market data and information about the financial instruments. These estimates do not reflect any premium or discount that could result from offering the Company’s entire holdings of a particular financial instrument for sale at one time, nor do they attempt to estimate the value of anticipated future business related to the instruments. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of these estimates. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following is a description of both the general and specific valuation methodologies used for certain instruments measured at fair value, as well as the general classification of these instruments pursuant to the valuation hierarchy. Investment securities – Investment securities are generally valued based upon quotes obtained from an independent third-party pricing service, which uses evaluated pricing applications and model processes. Observable market inputs, such as, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data are considered as part of the evaluation. The inputs are related directly to the security being evaluated, or indirectly to a similarly situated security. Market assumptions and market data are utilized in the valuation models. The Company reviews the market prices provided by the third-party pricing service for reasonableness based on the Company’s understanding of the market place and credit issues related to the securities. The Company has not made any adjustments to the market quotes provided by them and, accordingly, the Company categorized its investment portfolio within Level 2 of the fair value hierarchy. Interest rate swaps – The Company originates a variable rate loan and enters into a variable-to-fixed interest rate swap with the customer. The Company also enters into an offsetting swap with a correspondent bank. These back-to-back swap agreements are intended to offset each other and allow the Company to originate a variable rate loan, while providing a contract for fixed interest payments for the customer. The net cash flow for the Company is equal to the interest income received from a variable rate loan originated with the customer. The fair value of these derivatives is based on a market standard discounted cash flow approach. The Company incorporates credit value adjustments on derivatives to properly reflect the respective counterparty’s nonperformance risk in the fair value measurements of its derivatives. The Company has determined that the observable nature of the majority of inputs used in deriving the fair value of these derivative contracts fall within Level 2 of the fair value hierarchy, and the credit valuation adjustments are not significant to the overall valuation of its derivative financial instruments. As a result, the valuation of interest rate swaps is classified as Level 2 of the fair value hierarchy. Equity warrant assets – The Company acquired equity warrant assets as a result of acquisition of Opus. Opus received equity warrant assets through its lending activities as part of loan origination fees. The warrants provide the Bank the right to purchase a specific number of equity shares of the underlying company’s equity at a certain price before expiration and contain net settlement terms qualifying as derivatives under ASC Topic 815. The fair value of equity warrant assets is determined using a Black-Scholes option pricing model and are classified as Level 3 of the fair value hierarchy due to the extent of unobservable inputs. The key assumptions used in determining the fair value include the exercise price of the warrants, valuation of the underlying entity's outstanding stock, expected term, risk-free interest rate, marketability discount for private company warrants, and price volatility. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Individually evaluated Loans (impaired loans prior to adoption of ASC 326) – A loan is individually evaluated for expected credit losses when it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement. Individually evaluated loans are measured based on the fair value of the underlying collateral or the discounted expected future cash flows. Collateral generally consists of accounts receivable, inventory, fixed assets, real estate, and cash. The Company measures impairment on all nonaccrual loans for which it has reduced the principal balance to the value of the underlying collateral less the anticipated selling cost. Other Real Estate Owned – OREO is initially recorded at the fair value less estimated costs to sell at the date of transfer. This amount becomes the property’s new basis. Any fair value adjustments based on the property’s fair value less estimated costs to sell at the date of acquisition are charged to the allowance for credit losses. The fair value of individually evaluated collateral dependent loans and other real estate owned were determined using Level 3 assumptions, and represents individually evaluated loan and other real estate owned balances for which a specific reserve has been established or on which a write down has been taken. For real estate loans, generally, the Company obtains third party appraisals (or property valuations) and/or collateral audits in conjunction with internal analysis based on historical experience on its individually evaluated loans and other real estate owned to determine fair value. In determining the net realizable value of the underlying collateral for individually evaluated loans, the Company will then discount the valuation to cover both market price fluctuations and selling costs, typically ranging from 7% to 10% of the collateral value, that the Company expected would be incurred in the event of foreclosure. In addition to the discounts taken, the Company’s calculation of net realizable value considered any other senior liens in place on the underlying collateral. For non-real estate loans, fair value of the loan’s collateral may be determined using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions and management’s expertise and knowledge of the client and client’s business.
Variable Interest Entities	Variable Interest Entities. A VIE is consolidated in the Company’s financial statements when it is deemed the Company is the primary beneficiary of the VIE. GAAP requires analysis at the time of commencement of our involvement with a VIE, to determine the primary beneficiary and whether it should be consolidated in the Company’s financial statements. The Company continually performs analysis to determine the primary beneficiary of a VIE.The Company is involved with VIEs through its loan securitization activities, affordable housing investments that qualify for LIHTC, and trust subsidiaries, which have issued trust preferred securities. The Company has determined that its interests in these entities meet the definition of variable interests.
Reclassifications	Reclassifications. Some items in prior year financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or stockholders’ equity.
Recent Accounting Pronouncements	Accounting Standards Adopted in 2020 In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU” or “Update”) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . This Update replaces the incurred loss impairment model in current GAAP with a model that reflects current expected credit losses (“CECL”). The CECL model is applicable to the measurement of credit losses on financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. CECL also requires credit losses on available-for-sale debt securities be measured through an allowance for credit losses when the fair value is less than the amortized cost basis. It also applies to off-balance sheet credit exposures. The Update requires that all expected credit losses for financial assets held at the reporting date be measured based on historical experience, current conditions, and reasonable and supportable forecasts. The Update also requires enhanced disclosure, including qualitative and quantitative disclosures that provide additional information about significant estimates and judgments used in estimating credit losses. The provisions of this Update became effective for the Company for all annual and interim periods beginning January 1, 2020. In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments . This Update was issued as part of an ongoing project on the FASB’s agenda for improving the Codification or correcting for its unintended application. The FASB issued this Update, which is specific to Updates: 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , and 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . The amendments in this Update became effective for all interim and annual reporting periods for the Company on January 1, 2020. The Company adopted the provisions within this Update in conjunction with the implementation of ASC 326, Financial Instruments - Credit Losses , as discussed below, including: (i) the election to not measure credit losses on accrued interest receivable when such balances are written-off in a timely manner when deemed uncollectable and (ii) the election to not include the balance of accrued interest receivable as part of the amortized cost of a loan, but rather to present it separately in the consolidated statements of financial position. In May 2019, the FASB issued ASU 2019-05, Financial Instruments - Credit Losses (Topic 326) - Targeted Transition Relief . This Update was issued to allow entities that have certain financial instruments within the scope of ASC 326-20, Financial Instruments - Credit Losses - Measured at Amortized Cost , to make an irrevocable election to elect the fair value option for those instruments in ASC 825-10, Financial Instruments - Overall upon the adoption of ASC 326, which for the Company was January 1, 2020. The fair value option is not applicable to held-to-maturity debt securities. Entities are required to make this election on an instrument-by-instrument basis. The Company did not elect the fair value option for any of its financial assets upon the adoption of ASC 326 on January 1, 2020. The Company has developed an expected credit loss estimation model in accordance with ASC 326. The Company implemented the model through a cross-functional effort steered by a CECL Committee, related sub-committees and working groups. These committees, sub-committees and working groups, collectively, were primarily comprised of senior management and staff members from our finance, credit, lending, internal audit, risk management, and IT functional areas. Depending on the nature of each identified pool of financial assets with similar risk characteristics, the Company employs the use of a probability of default (“PD”) and loss given default (“LGD”) discounted cash flow methodology for commercial real estate and commercial loans, and a loss-rate methodology for retail loans, in order to estimate expected future credit losses. The Company’s model incorporates reasonable and supportable economic forecasts into the estimate of expected credit losses, which requires significant judgment. Management leverages economic projections from a reputable and independent third party to inform its reasonable and supportable economic forecasts. Effective January 1, 2020, the Company adopted the provisions of ASC 326 through the application of the modified retrospective transition approach, and recorded a net decrease of $45.6 million to the beginning balance of retained earnings as of January 1, 2020 for the cumulative effect adjustment, reflecting an initial adjustment to the allowance for credit losses of $64.0 million, net of related deferred tax assets arising from temporary differences of $18.3 million, commonly referred to as the “Day 1” adjustment. The Day 1 adjustment to the ACL is reflective of expected lifetime credit losses associated with the composition of financial assets within the scope of ASC 326 as of January 1, 2020, which is comprised of loans held for investment and off-balance sheet credit exposures at January 1, 2020, as well as management’s current expectation of future economic conditions. Management did not have any qualitative adjustments as of January 1, 2020. The Day 1 adjustment was comprised of $55.7 million for loans held for investment and $8.3 million for off-balance sheet commitments for a total of $64.0 million. The Day 1 adjustment to the ACL for loans held for investment consists of $16.1 million for investor loans secured by real estate, $27.6 million for business real estate secured loans, $9.5 million for commercial loans, and $2.5 million for retail loans. The majority of the Day 1 increase in the ACL for loans held for investment is attributable primarily to the life of loan loss impact and addition of an allowance on previously acquired loans based on the methodology discussed above. In addition, the Day 1 increase is also attributable to the incorporation of reasonable and supportable economic forecasts into the estimate of expected future credit losses on our commercial real estate and commercial owner-occupied loan portfolios, which have commercial real estate as the primary collateral source and longer contractual maturities relative to our loan portfolio as a whole. Please also see Note 5 - Allowance for Credit Losses and Note 4 - Loans Held for Investment , for additional information on the Company’s ACL, as well as other related disclosures. The Company’s assessment of held-to-maturity and available-for-sale investment securities as of January 1, 2020 indicated that an ACL was not required. The Company determined the likelihood of default on held-to-maturity investment securities was remote, and the amount of expected non-repayment on those investments was zero. The Company also analyzed available-for-sale investment securities that were in an unrealized loss position as of January 1, 2020 and determined the decline in fair value for those securities was not related to credit, but rather related to changes in interest rates and general market conditions. As such, no ACL was recorded for held-to-maturity and available-for-sale securities as of January 1, 2020. In accordance with ASC 326-10-65, upon the adoption of ASC 326, the Company did not reassess purchased loans with credit deterioration (previously classified as purchased credit impaired (“PCI”) loans under ASC 310-30), as there were no such loans on January 1, 2020. Additionally, there were no investment securities with previously recorded other-than-temporary impairment as of January 1, 2020. As previously mentioned, in conjunction with the adoption of ASC 326, the Company made an accounting policy election not to measure an ACL on accrued interest receivables in accordance with ASC 326-20-30-5A. When accrued interest receivable is deemed to be uncollectable, the Company promptly reverses such balances through current period interest income in the period deemed uncollectable. Additionally, the Company has also elected not to include the balance of accrued interest receivable in the amortized cost basis of financial assets within the scope of ASC 326. Accrued interest receivable will continue to be presented separately in the Consolidated Financial Statements. In February 2019, the U.S. federal bank regulatory agencies approved a final rule modifying their regulatory capital rules and providing an option to phase in over a three-year period the Day 1 adverse regulatory capital effects of ASU 2016-13. Additionally, in March 2020, the U.S. federal bank regulatory agencies issued an interim final rule that provides banking organizations an option to delay the estimated CECL impact on regulatory capital for an additional two years for a total transition period of up to five years to provide regulatory relief to banking organizations to better focus on supporting lending to creditworthy households and businesses in light of recent strains on the U.S. economy as a result of the COVID-19 pandemic. The final rule was adopted and became effective in September 2020. As a result, entities have the option to gradually phase in the full effect of CECL on regulatory capital over a five-year transition period. The Company implemented its CECL model commencing January 1, 2020 and elected to phase in the full effect of CECL on regulatory capital over the five-year transition period. The following table illustrates the impact of the adoption of the CECL model under ASC 326 on the Company’s consolidated statements of financial position as of January 1, 2020: January 1, 2020 Pre-CECL Adoption Impact of CECL Adoption As Reported Under CECL (Dollars in thousands) Assets: Allowance for credit losses on debt securities: Held-to-maturity $ — $ — $ — Available-for-sale — — — Allowance for credit losses on loans: Investor loans secured by real estate 9,027 16,072 25,099 Business loans secured by real estate 5,492 27,572 33,064 Commercial loans 20,118 9,519 29,637 Retail loans 1,061 2,523 3,584 Deferred tax (liabilities) assets (1,371) 18,346 16,975 Liabilities: Allowance for credit losses on off-balance sheet credit exposures $ 3,279 $ 8,285 $ 11,564 Stockholders' equity: Retained earnings $ 396,051 $ (45,625) $ 350,426 In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848)—Facilitation of the Effects of Reference Rate Reform on Financial Reporting . In response to concerns about structural risks of interbank offered rates (“IBORs”), and, particularly, the risk of cessation of the London Interbank Offered Rate (“LIBOR”), regulators around the world have undertaken reference rate reform initiatives to identify alternative reference rates that are more observable or transaction-based and less susceptible to manipulation. The amendments in this Update provide optional guidance for a limited time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting as well as optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this Update apply only to contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022. The amendments in this Update are elective and became effective upon issuance for all entities. An entity may elect to apply the amendments for contract modifications by Topic or Industry Subtopic as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020, up to the date that the financial statements are available to be issued. Once elected for a Topic or an Industry Subtopic, the amendments in this Update must be applied prospectively for all eligible contract modifications for that Topic or Industry Subtopic. The Company has not yet made a determination on whether it will make this election and is currently tracking the exposure as of each reporting period and assessing the significance of impact towards implementing any necessary modification in consideration of the election of this amendment. An entity may elect to apply the amendments in this Update to eligible hedging relationships existing as of the beginning of the interim period that includes March 12, 2020 and to new eligible hedging relationships entered into after the beginning of the interim period that includes March 12, 2020. The Company does not currently engage in hedging related transactions, and as such, the amendments included in this Update have not had an impact on the Company’s Consolidated Financial Statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement . The amendments in this Update modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement. The following disclosure requirements for public companies were removed from Topic 820: • The amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy • The policy for timing of transfers between levels • The valuation processes for Level 3 fair value measurements The following disclosure requirements for public companies were modified in Topic 820: • The amendments clarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date The following disclosure requirements for public companies were added to Topic 820: • The changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period • The range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information (such as the median or arithmetic average) in lieu of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. The amendments in this Update became effective for the Company beginning on January 1, 2020. This ASU did not have a material effect on the Company’s Consolidated Financial Statements. In March 2019, the FASB issued ASU 2019-01, Leases (Topic 842): Codification Improvements . This Update provides clarification on certain aspects of an entity’s implementation of Topic 842 including those that relate to: • Determining the fair value of the underlying asset by lessors that are not manufacturers or dealers. The amendments related to this item carry forward from Topic 840 to Topic 842 an exception that allows lessors who are not manufacturers or dealers to use the cost of the underlying asset as its fair value. • Presentation on the statement of cash flows - sales-type and direct financing leases. The amendments related to this item clarify that all principal payments received on leases by lessors in sales-type or direct financing lease transactions should be reflected in investing activities for entities such as depository and lending institutions within in the scope of Topic 942. • Transition disclosures related to Topic 250, Accounting Changes and Error Corrections. The amendments related to this item clarify the FASB’s original intent by explicitly providing an exception to the paragraph 250-10-50-3 interim disclosure requirements in the Topic 842 transition disclosure requirements, which would otherwise require interim disclosures after the date of adoption of Topic 842 related to the impacts of the change on: (a) income from continuing operations, (b) net income, (c) any other financial statement line item, and (d) any affected per-share amounts. The amendments in this Update became effective for the Company beginning on January 1, 2020. This ASU did not have a material effect on the Company’s Consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): simplifying the Test for Goodwill Impairment . The amendments in this Update simplify the requirements for how an entity measures goodwill for impairment. This Update eliminates “Step 2” in the goodwill impairment test. Under the provisions of this Update, an entity measures the amount of goodwill impairment as the amount by which a reporting unit’s carrying value exceeds its fair value, however the amount of impairment loss is limited to the amount of goodwill allocated to that reporting unit. The amendments in this Update became effective for the Company beginning on January 1, 2020. This ASU did not have a material effect on the Company’s Consolidated Financial Statements. Recent Accounting Guidance Not Yet Effective In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848). The amendments included in this Update clarify that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the world-wide transition to new reference rates (commonly referred to as the “discounting transition”). Specifically, certain provisions in Topic 848, if elected by an entity, apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. Amendments in this Update to the expedients and exceptions in Topic 848 capture the incremental consequences of the scope clarification and tailor the existing guidance to derivative instruments affected by the discounting transition. The amendments in this Update are effective immediately for all entities that elect to apply the optional guidance in Topic 848. An entity may elect to apply the amendments in this Update on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or on a prospective basis to new modifications from any date within an interim period that includes or is subsequent to the date of the issuance of a final Update, up to the date that financial statements are available to be issued. The Company is currently evaluating the impact of this Update on its Consolidated Financial Statements, upon which this accounting guidance is not expected to have a material impact. In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables - Nonrefundable Fees and Other Costs . The amendments included in this Update are intended to clarify that an entity should reevaluate whether a callable debt security is within the scope of paragraph 310-20-35-33 for each reporting period. The guidance in paragraph 310-20-35-33 relates to amortization of premiums on individual callable debt securities and the period over which the premium shall be amortized in relation to the date the security is callable. For public business entities, the amendments in this Update are effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2020. The Company is evaluating the impact of this Update on its Consolidated Financial Statements, upon which this accounting guidance is not expected to have a material impact. In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40) - Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity . The FASB issued this Update to address complexities associated with the accounting for certain financial instruments that possess characteristics of liabilities and equity, and to amend guidance for the derivatives scope exception for contracts in an entity’s own equity in an effort to reduce disparate accounting results for certain economically similar contracts. With respect to convertible instruments, this Update eliminates certain accounting models with the intent to simplify the accounting for convertible instruments and reduce the complexity for preparers and users of an entity’s financial statements. Convertible instruments primarily affected by this Update are those issued with beneficial conversion features or cash conversion features, because the accounting models for those specific features are removed. For contracts in an entity’s own equity, the type of contracts primarily affected by this Update are freestanding and embedded features that are accounted for as derivatives under the current guidance due to a failure to meet the settlement conditions of the derivative scope exception. This Update simplifies the related settlement assessment by removing the requirements to (i) consider whether the contract would be settled in registered shares, (ii) consider whether collateral is required to be posted, and (iii) assess shareholder rights. This Update also makes targeted improvements to the disclosures for convertible instruments and earnings per share guidance. Entities may adopt the provisions of this Update using either the modified retrospective method or a fully retrospective method. Under the modified retrospective method, entities are required to apply the guidance to transactions outstanding as of the beginning of the fiscal year in which the amendments in this Update are adopted. Any cumulative effect of the change should be recognized as an adjustment to the opening balance of retained earnings in the year of adoption for entities applying the modified retrospective method. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. The Company is evaluating the impact of this Update on its Consolidated Financial Statements, upon which this accounting guidance is not expected to have a material impact. In January 2020, the FASB issued ASU 2020-01, Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)—Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 . The amendments in this Update clarify the interaction of the accounting for equity securities under Topic 321 and investments under the equity method of accounting in Topic 323, as well as the accounting for certain forward contracts and purchased options accounted for under Topic 815. The amendments clarify that an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative in accordance with Topic 321 immediately before applying or upon discontinuing the equity method. The amendments within this Update also clarify that when applying the guidance in paragraph 815-10-15-141(a) an entity should not consider whether, upon the settlement of the forward contract or exercise of the purchased option, individually or with existing investments, the underlying securities would be accounted for under the equity method in Topic 323 or the fair value option in accordance with the financial instruments guidance in Topic 825. An entity also would evaluate the remaining characteristics in paragraph 815-10-15-141 to determine the accounting for those forward contracts and purchased options. The amendments within this Update become effective for public business entities for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. Early adoption is permitted, including early adoption in an interim period. The Company is evaluating the impact of this Update on its Consolidated Financial Statements, upon which this accounting guidance is not expected to have a material impact. In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes , which include updates to Topic 740 - Income Taxes . The amendments to this Update include the removal of the following exceptions included in Topic 740: (1) Exception to the general intra-period tax allocation principle when there is a loss from continuing operations and income or a gain from other items (for example, discontinued operations or other comprehensive income); (2) Exception to the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment; (3) Exception to the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary, and (4) Exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The amendments included in this update also require the following: (1) Requiring that an entity recognize a franchise tax by (i) accounting for the amount based on income under ASC 740 and (ii) accounting for any residual amount as a non-income-based tax.. (2) Requiring that an entity evaluate when a step up in the tax basis of goodwill should be considered part of the business combination in which the book goodwill was originally recognized and when it should be considered a separate transaction. (3) Specifying that an entity is not required to allocate any portion of the consolidated amount of current and deferred tax expense to a legal entity that is not subject to tax in its separate financial statements. However, an entity may elect to do so (on an entity-by-entity basis) for a legal entity that is both not subject to tax and disregarded by the taxing authority. (4) Requiring that an entity reflect the effect of an enacted change in tax laws or rates in the annual effective tax rate computation in the interim period that includes the enactment date. (5) Making minor Codification improvements for tax benefits related to tax-deductible dividends on employee stock ownership plan shares and investments in qualified affordable housing projects accounted for using the equity method. For public business entities, the Update is effective for annual periods beginning after December 15, 2020 and interim periods within those annual periods. Early adoption is permitted. The Company does not believe the amendments in this Update will have a material impact on its Consolidated Financial Statements.

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Impact of adoption of the CECL model Under ASC 326	The following table illustrates the impact of the adoption of the CECL model under ASC 326 on the Company’s consolidated statements of financial position as of January 1, 2020: January 1, 2020 Pre-CECL Adoption Impact of CECL Adoption As Reported Under CECL (Dollars in thousands) Assets: Allowance for credit losses on debt securities: Held-to-maturity $ — $ — $ — Available-for-sale — — — Allowance for credit losses on loans: Investor loans secured by real estate 9,027 16,072 25,099 Business loans secured by real estate 5,492 27,572 33,064 Commercial loans 20,118 9,519 29,637 Retail loans 1,061 2,523 3,584 Deferred tax (liabilities) assets (1,371) 18,346 16,975 Liabilities: Allowance for credit losses on off-balance sheet credit exposures $ 3,279 $ 8,285 $ 11,564 Stockholders' equity: Retained earnings $ 396,051 $ (45,625) $ 350,426

Regulatory Capital Requiremen_2

Regulatory Capital Requirements and Other Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2020
Regulatory Capital Requirements under Banking Regulations [Abstract]
Schedule of Company's and Bank's actual capital amounts and ratios	As defined in applicable regulations and set forth in the table below, the Corporation and the Bank continue to exceed the regulatory capital minimum requirements, and the Bank continues to exceed the “well capitalized” standards and the required conservation buffer at the dates indicated: Actual Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer Minimum Required For Well Capitalized Requirement Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2020 Pacific Premier Bancorp, Inc. Consolidated Tier 1 Leverage Ratio $ 1,811,280 9.47 % 764,968 4.00 % N/A N/A Common Equity Tier 1 Capital Ratio 1,811,280 12.04 % 1,053,063 7.00 % N/A N/A Tier 1 Capital Ratio 1,811,280 12.04 % 1,278,719 8.50 % N/A N/A Total Capital Ratio 2,454,055 16.31 % 1,579,594 10.50 % N/A N/A Pacific Premier Bank Tier 1 Leverage Ratio $ 2,081,916 10.89 % 764,863 4.00 % $ 956,079 5.00 % Common Equity Tier 1 Capital Ratio 2,081,916 13.84 % 1,053,177 7.00 % 977,950 6.50 % Tier 1 Capital Ratio 2,081,916 13.84 % 1,278,858 8.50 % 1,203,631 8.00 % Total Capital Ratio 2,390,954 15.89 % 1,579,766 10.50 % 1,504,539 10.00 % December 31, 2019 Pacific Premier Bancorp, Inc. Consolidated Tier 1 Leverage Ratio $ 1,123,740 10.54 % 426,597 4.00 % N/A N/A Common Equity Tier 1 Capital Ratio 1,116,185 11.35 % 688,508 7.00 % N/A N/A Tier 1 Capital Ratio 1,123,740 11.42 % 836,045 8.50 % N/A N/A Total Capital Ratio 1,357,904 13.81 % 1,032,762 10.50 % N/A N/A Pacific Premier Bank Tier 1 Leverage Ratio $ 1,321,494 12.39 % 426,592 4.00 % $ 533,240 5.00 % Common Equity Tier 1 Capital Ratio 1,321,494 13.43 % 688,650 7.00 % 639,461 6.50 % Tier 1 Capital Ratio 1,321,494 13.43 % 836,218 8.50 % 787,029 8.00 % Total Capital Ratio 1,360,471 13.83 % 1,032,975 10.50 % 983,786 10.00 %

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost and estimated fair value of securities	The amortized cost and estimated fair value of investment securities were as follows: December 31, 2020 Amortized Gross Unrealized Gross Unrealized Estimated (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury $ 30,153 $ 2,380 $ — $ 32,533 Agency 666,702 24,292 (608) 690,386 Corporate 412,223 3,591 (506) 415,308 Municipal bonds 1,412,012 37,260 (3,253) 1,446,019 Collateralized mortgage obligation 513,259 819 (712) 513,366 Mortgage-backed securities 812,384 21,662 (543) 833,503 Total investment securities available-for-sale 3,846,733 90,004 (5,622) 3,931,115 Investment securities held-to-maturity: Mortgage-backed securities 22,124 1,281 — 23,405 Other 1,608 — — 1,608 Total investment securities held-to-maturity 23,732 1,281 — 25,013 Total investment securities $ 3,870,465 $ 91,285 $ (5,622) $ 3,956,128 December 31, 2019 Amortized Gross Unrealized Gross Unrealized Estimated (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury $ 60,457 $ 3,137 $ (39) $ 63,555 Agency 240,348 7,686 (1,676) 246,358 Corporate 149,150 2,217 (14) 151,353 Municipal bonds 384,032 13,450 (184) 397,298 Collateralized mortgage obligation 9,869 123 (8) 9,984 Mortgage-backed securities 494,404 7,603 (2,171) 499,836 Total investment securities available-for-sale 1,338,260 34,216 (4,092) 1,368,384 Investment securities held-to-maturity: Mortgage-backed securities 36,114 922 — 37,036 Other 1,724 — — 1,724 Total investment securities held-to-maturity 37,838 922 — 38,760 Total investment securities $ 1,376,098 $ 35,138 $ (4,092) $ 1,407,144
Schedule of number, fair value and gross unrealized holding losses	The table below shows the number, fair value, and gross unrealized holding losses of the Company’s investment securities by investment category and length of time that the securities have been in a continuous unrealized loss position. December 31, 2020 Less than 12 months 12 months or Longer Total Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Investment securities available-for-sale: Agency 4 $ 74,194 $ (307) 9 $ 10,434 $ (301) 13 $ 84,628 $ (608) Corporate 9 71,226 (506) — — — 9 71,226 (506) Municipal bonds 56 312,894 (3,253) — — — 56 312,894 (3,253) Collateralized mortgage obligation 21 215,603 (710) 1 431 (2) 22 216,034 (712) Mortgage-backed securities 16 139,071 (543) — — — 16 139,071 (543) Total investment securities available-for-sale 106 $ 812,988 $ (5,319) 10 $ 10,865 $ (303) 116 $ 823,853 $ (5,622) December 31, 2019 Less than 12 months 12 months or Longer Total Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury 1 $ 10,194 $ (39) — $ — $ — 1 $ 10,194 $ (39) Agency 13 102,874 (1,340) 9 13,514 (336) 22 116,388 (1,676) Corporate 1 1,017 (14) — — — 1 1,017 (14) Municipal bonds 12 30,541 (184) — — — 12 30,541 (184) Collateralized mortgage obligation — — — 1 603 (8) 1 603 (8) Mortgage-backed securities 18 130,014 (1,681) 11 26,886 (490) 29 156,900 (2,171) Total investment securities available-for-sale 45 $ 274,640 $ (3,258) 21 $ 41,003 $ (834) 66 $ 315,643 $ (4,092)
Schedule of amortized cost and estimated fair value of investment securities available for sale by contractual maturity	The amortized cost and estimated fair value of investment securities available-for-sale at December 31, 2020, by contractual maturity, are shown in the table below. Due in One Year Due after One Year Due after Five Years Due after Total Amortized Fair Amortized Fair Amortized Fair Amortized Fair Amortized Fair (Dollars in thousands) Investment securities available-for-sale: Treasury $ — $ — $ 30,153 $ 32,533 $ — $ — $ — $ — $ 30,153 $ 32,533 Agency — — 357,471 365,530 216,904 227,338 92,327 97,518 666,702 690,386 Corporate 146,122 146,471 9,696 9,714 218,964 221,753 37,441 37,370 412,223 415,308 Municipal bonds 9,922 10,525 3,456 3,743 34,623 37,721 1,364,011 1,394,030 1,412,012 1,446,019 Collateralized mortgage obligation — — 14,938 14,869 219,553 219,509 278,768 278,988 513,259 513,366 Mortgage-backed securities — — 2,167 2,313 204,924 216,932 605,293 614,258 812,384 833,503 Total investment securities available-for-sale 156,044 156,996 417,881 428,702 894,968 923,253 2,377,840 2,422,164 3,846,733 3,931,115 Investment securities held-to-maturity: Mortgage-backed securities — — — — — — 22,124 23,405 22,124 23,405 Other — — — — — — 1,608 1,608 1,608 1,608 Total investment securities held-to-maturity — — — — — — 23,732 25,013 23,732 25,013 Total investment securities $ 156,044 $ 156,996 $ 417,881 $ 428,702 $ 894,968 $ 923,253 $ 2,401,572 $ 2,447,177 $ 3,870,465 $ 3,956,128
Schedule of investment securities by external credit rating	The following table summarizes the Company’s investment securities portfolio by Moody’s external rating equivalent and by vintage as of December 31, 2020: December 31, 2020 Vintage 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Investment securities available-for-sale: U.S. Treasury Aaa - Aa3 $ — $ — $ 21,852 $ 10,681 $ — $ — $ 32,533 Agency Aaa - Aa3 359,428 60,943 157,942 9,733 20,711 81,629 690,386 Corporate debt A1 - A3 60,858 — — — 118,631 9,145 188,634 Baa1 - Baa3 99,999 69,638 5,034 17,936 5,449 28,618 226,674 Municipal bonds Aaa - Aa3 1,022,544 290,007 32,798 60,595 15,294 23,919 1,445,157 A1 - A3 — — — — — 862 862 Collateralized mortgage obligations Aaa - Aa3 241,971 107,104 29,890 15,305 105,641 13,455 513,366 Mortgage-backed securities Aaa - Aa3 424,825 112,447 32,901 144,513 39,975 78,842 833,503 Total investment securities available-for-sale 2,209,625 640,139 280,417 258,763 305,701 236,470 3,931,115 Investment securities held-to-maturity: Mortgage-backed securities Aaa - Aa3 — — 6,552 5,372 4,209 5,991 22,124 Other Baa1 - Baa3 — — 633 — — 975 1,608 Total investment securities held-to-maturity — — 7,185 5,372 4,209 6,966 23,732 Total investment securities $ 2,209,625 $ 640,139 $ 287,602 $ 264,135 $ 309,910 $ 243,436 $ 3,954,847

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Schedule of components of loans held for investment	The following table presents the composition of the loan portfolio as of the dates indicated: December 31, 2020 2019 (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 2,675,085 $ 2,070,141 Multifamily 5,171,356 1,575,726 Construction and land 321,993 438,786 SBA secured by real estate 57,331 68,431 Total investor loans secured by real estate 8,225,765 4,153,084 Business loans secured by real estate CRE owner-occupied 2,114,050 1,846,554 Franchise real estate secured 347,932 353,240 SBA secured by real estate 79,595 88,381 Total business loans secured by real estate 2,541,577 2,288,175 Commercial loans Commercial and industrial 1,768,834 1,393,270 Franchise non-real estate secured 444,797 564,357 SBA non-real estate secured 15,957 17,426 Total commercial loans 2,229,588 1,975,053 Retail loans Single family residential 232,574 255,024 Consumer 6,929 50,975 Total retail loans 239,503 305,999 Gross loans held for investment (1) 13,236,433 8,722,311 Allowance for credit losses for loans held for investment (2) (268,018) (35,698) Loans held for investment, net $ 12,968,415 $ 8,686,613 Loans held for sale, at lower of cost or fair value $ 601 $ 1,672 ______________________________ (1) Includes unaccreted fair value net purchase discounts of $113.8 million and $40.7 million as of December 31, 2020 and December 31, 2019 respectively. (2) The allowance for credit losses as of December 31, 2019 was accounted for under ASC 450 and ASC 310, which is reflective of probable incurred losses as of the balance sheet date. Effective January 1, 2020, the allowance for credit losses is accounted for under ASC 326, which is reflective of estimated expected lifetime credit losses.
Schedule of loan portfolio by internal risk	The following table stratifies the loans held for investment portfolio by the Company’s internal risk grading, and by year of origination, as of December 31, 2020: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total December 31, 2020 (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied Pass $ 265,901 $ 541,994 $ 440,351 $ 287,580 $ 279,238 $ 791,477 $ 11,114 $ — $ 2,617,655 Special mention — — 6,669 437 2,516 29,738 — — 39,360 Substandard — 9,732 2,045 — 516 5,218 559 — 18,070 Multifamily Pass 1,027,644 1,677,716 899,123 665,939 354,859 531,287 420 — 5,156,988 Special mention — 1,758 2,630 — 8,649 — — — 13,037 Substandard — — — 559 772 — — — 1,331 Construction and land Pass 57,309 144,759 73,313 18,625 20,531 6,672 784 — 321,993 SBA secured by real estate Pass — 8,306 9,029 13,418 6,305 7,696 — — 44,754 Special mention 496 1,032 1,159 1,000 373 306 — — 4,366 Substandard — 1,220 2,959 1,091 400 2,541 — — 8,211 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loans secured by real estate CRE owner-occupied Pass $ 293,324 $ 409,758 $ 332,672 $ 327,475 $ 225,098 $ 469,704 $ 14,268 $ 246 $ 2,072,545 Special mention 2,190 15,917 3,802 — 4,153 201 — — 26,263 Substandard — — 3,636 4,214 1,169 5,973 250 — 15,242 Franchise real estate secured Pass 44,413 81,438 66,241 96,999 24,673 27,020 — — 340,784 Special mention 878 1,650 2,652 — — — — — 5,180 Substandard — — — — 1,968 — — — 1,968 SBA secured by real estate Pass 3,253 7,637 12,608 16,058 8,488 23,624 — — 71,668 Special mention — — 1,200 — 137 — — — 1,337 Substandard — — 184 1,987 1,376 3,043 — — 6,590 Total loans secured by business real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 Commercial Loans Commercial and industrial Pass $ 127,082 $ 260,368 $ 159,001 $ 210,163 $ 51,800 $ 82,291 $ 801,752 $ 9,315 $ 1,701,772 Special mention 735 — 2,331 185 1,320 243 17,890 37 22,741 Substandard — 3,310 2,737 610 1,333 2,446 32,858 1,027 44,321 Franchise non-real estate secured Pass 27,607 164,025 94,494 46,174 40,829 27,745 1,361 502 402,737 Special mention — 7,267 2,037 230 480 2,321 — — 12,335 Substandard — 6,690 3,706 18,425 700 204 — — 29,725 SBA non-real estate secured Pass 407 2,257 1,558 2,674 610 4,449 — 259 12,214 Special mention — — — 1,574 — — — — 1,574 Substandard — 83 357 282 340 400 707 — 2,169 Total commercial loans $ 155,831 $ 444,000 $ 266,221 $ 280,317 $ 97,412 $ 120,099 $ 854,568 $ 11,140 $ 2,229,588 Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total December 31, 2020 (Dollars in thousands) Retail Loans Single family residential Pass $ 10,794 $ 7,714 $ 13,982 $ 14,039 $ 33,968 $ 124,248 $ 27,172 — $ 231,917 Substandard — — — — — 657 — — 657 Consumer loans Pass 52 112 37 25 2 3,145 3,508 — 6,881 Substandard — 7 — — — 41 — — 48 Total retail loans $ 10,846 $ 7,833 $ 14,019 $ 14,064 $ 33,970 $ 128,091 $ 30,680 $ — $ 239,503 Totals gross loans $ 1,862,085 $ 3,354,750 $ 2,140,513 $ 1,729,763 $ 1,072,603 $ 2,152,690 $ 912,643 $ 11,386 $ 13,236,433 The following table stratifies the loan portfolio by the Company’s internal risk rating as of December 31, 2019: Credit Risk Grades Pass Special Substandard Total Gross (Dollars in thousands) December 31, 2019 Investor loans secured by real estate CRE non-owner-occupied $ 2,067,875 $ 1,178 $ 1,088 $ 2,070,141 Multifamily 1,575,510 — 216 1,575,726 Construction and land 438,769 — 17 438,786 SBA secured by real estate 65,835 973 1,623 68,431 Total investor loans secured by real estate 4,147,989 2,151 2,944 4,153,084 Business loans secured by real estate CRE owner-occupied 1,831,853 11,167 3,534 1,846,554 Franchise real estate secured 352,319 921 — 353,240 SBA secured by real estate 83,106 1,842 3,433 88,381 Total business loans secured by real estate 2,267,278 13,930 6,967 2,288,175 Commercial loans Commercial and industrial 1,359,662 13,226 20,382 1,393,270 Franchise non-real estate secured 546,594 6,930 10,833 564,357 SBA not secured by real estate 13,933 485 3,008 17,426 Total commercial loans 1,920,189 20,641 34,223 1,975,053 Retail loans Single family residential 254,463 — 561 255,024 Consumer loans 50,921 — 54 50,975 Total retail loans 305,384 — 615 305,999 Total gross loans $ 8,640,840 $ 36,722 $ 44,749 $ 8,722,311 The following table presents PD bands for commercial real estate and commercial loan segments of the loan portfolio as of the date indicated. Commercial Real Estate Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied 0% - 5.00% $ 261,885 $ 491,522 $ 431,791 $ 266,942 $ 254,527 $ 763,101 $ 11,114 $ — $ 2,480,882 >5.00% - 10.00% 4,016 34,360 5,794 10,558 16,961 33,734 — — 105,423 Greater than 10% — 25,844 11,480 10,517 10,782 29,598 559 — 88,780 Multifamily 0% - 5.00% 950,089 1,610,011 878,233 634,268 349,549 516,452 — — 4,938,602 >5.00% - 10.00% 38,892 59,500 12,181 19,751 10,917 13,606 — — 154,847 Greater than 10% 38,663 9,963 11,339 12,479 3,814 1,229 420 — 77,907 Construction and Land 0% - 5.00% 55,785 40,860 4,604 11,238 — 6,412 784 — 119,683 >5.00% - 10.00% 1,123 41,046 9,197 3,601 — 260 — — 55,227 Greater than 10% 401 62,853 59,512 3,786 20,531 — — — 147,083 SBA secured by real estate 0% - 5.00% 496 10,400 12,558 14,497 7,078 10,032 — — 55,061 >5.00% - 10.00% — — — 1,012 — — — — 1,012 Greater than 10% — 158 589 — — 511 — — 1,258 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loans secured by real estate CRE owner-occupied 0% - 5.00% $ 286,745 $ 367,269 $ 274,512 $ 295,809 $ 202,282 $ 422,614 $ 10,393 $ 246 $ 1,859,870 >5.00% - 10.00% 8,769 42,310 60,222 28,421 23,875 44,855 3,875 — 212,327 Greater than 10% — 16,096 5,376 7,459 4,263 8,409 250 — 41,853 Franchise real estate secured 0% - 5.00% 37,262 79,926 65,619 96,672 19,046 22,927 — — 321,452 >5.00% - 10.00% 7,587 1,650 3,274 327 5,627 4,093 — — 22,558 Greater than 10% 442 1,512 — — 1,968 — — — 3,922 SBA secured by real estate 0% - 5.00% 3,253 7,637 11,840 15,069 5,707 18,742 — — 62,248 >5.00% - 10.00% — — 768 989 2,780 4,882 — — 9,419 Greater than 10% — — 1,384 1,987 1,514 3,043 — — 7,928 Total business loans secured by real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 Commercial Real Estate Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Commercial Loans Commercial and industrial 0% - 5.00% $ 70,233 $ 205,395 $ 99,178 $ 193,046 $ 36,957 $ 62,682 $ 394,124 $ 5,051 $ 1,066,666 >5.00% - 10.00% 49,883 50,743 35,813 13,427 12,922 13,948 322,123 2,469 501,328 Greater than 10% 7,701 7,540 29,078 4,485 4,574 8,350 136,253 2,859 200,840 Franchise non-real estate secured 0% - 5.00% 21,409 145,392 88,171 38,010 21,956 23,479 — 502 338,919 >5.00% - 10.00% 6,198 15,754 5,454 8,164 18,415 3,626 — — 57,611 Greater than 10% — 16,836 6,612 18,655 1,638 3,165 1,361 — 48,267 SBA not secured by real estate 0% - 5.00% 407 2,257 910 1,078 441 2,782 — — 7,875 >5.00% - 10.00% — — 648 1,596 169 1,652 — 259 4,324 Greater than 10% — 83 357 1,856 340 415 707 — 3,758 Total commercial loans $ 155,831 $ 444,000 $ 266,221 $ 280,317 $ 97,412 $ 120,099 $ 854,568 $ 11,140 $ 2,229,588 A significant driver in the ACL for loans in the investor real estate secured and business real estate secured segments is loan to value (“LTV”). The following table summarizes the amortized cost of loans in these segments by current estimated LTV and by year of origination as of the date indicated: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied 55% and below $ 138,007 $ 229,272 $ 182,385 $ 136,355 $ 189,848 $ 588,230 $ 11,114 $ — $ 1,475,211 >55-65% 101,434 217,210 92,015 130,024 78,470 204,161 559 — 823,873 >65-75% 26,460 102,494 169,878 18,876 13,952 29,506 — — 361,166 Greater than 75% — 2,750 4,787 2,762 — 4,536 — — 14,835 Multifamily 55% and below 218,833 345,519 294,464 233,997 84,530 269,906 — — 1,447,249 >55-65% 381,737 731,408 381,282 215,170 152,066 189,151 420 — 2,051,234 >65-75% 427,074 583,078 215,389 215,452 127,684 66,457 — — 1,635,134 Greater than 75% — 19,469 10,618 1,879 — 5,773 — — 37,739 Construction and land 55% and below 57,309 105,308 36,068 18,625 20,531 6,672 784 — 245,297 >55-65% — 36,113 23,770 — — — — — 59,883 >65-75% — 3,338 13,475 — — — — — 16,813 Greater than 75% — — — — — — — — — SBA secured by real estate 55% and below — 2,066 649 673 317 778 — — 4,483 >55-65% — 2,427 1,639 4,008 879 4,354 — — 13,307 >65-75% — 3,897 3,882 3,482 4,519 1,884 — — 17,664 Greater than 75% 496 2,168 6,977 7,346 1,363 3,527 — — 21,877 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loan secured by real estate CRE owner-occupied 55% and below $ 96,803 $ 160,605 $ 157,868 $ 179,791 $ 131,795 $ 328,188 $ 14,518 $ 246 $ 1,069,814 >55-65% 72,044 91,028 98,176 94,712 65,120 90,548 — — 511,628 >65-75% 71,692 152,920 79,106 43,832 31,303 31,493 — — 410,346 Greater than 75% 54,975 21,122 4,960 13,354 2,202 25,649 — — 122,262 Franchise real estate secured 55% and below 20,801 10,470 13,864 20,956 9,189 16,213 — — 91,493 >55-65% 2,689 9,955 16,001 19,102 6,855 2,333 — — 56,935 >65-75% 19,349 51,719 23,258 9,153 10,597 7,236 — — 121,312 Greater than 75% 2,452 10,944 15,770 47,788 — 1,238 — — 78,192 SBA secured by real estate 55% and below 1,825 1,626 5,332 5,495 3,615 13,582 — — 31,475 >55-65% 246 513 1,795 1,094 3,586 5,448 — — 12,682 >65-75% 264 3,142 1,515 3,968 1,586 4,043 — — 14,518 Greater than 75% 918 2,356 5,350 7,488 1,214 3,594 — — 20,920 Total business loans secured by real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 The following table presents FICO bands for the retail segment of the loan portfolio as of the date indicated: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Retail Loans Single family residential Greater than 740 $ 10,794 $ 6,531 $ 12,679 $ 8,846 $ 28,222 $ 81,838 $ 19,588 $ — $ 168,498 >680 - 740 — 1,183 1,303 4,732 2,614 15,624 6,685 — 32,141 >580 - 680 — — — 461 3,132 7,473 864 — 11,930 Less than 580 — — — — — 19,970 35 — 20,005 Consumer loans Greater than 740 52 69 31 22 1 2,609 2,198 — 4,982 >680 - 740 — 35 6 3 — 469 1,227 — 1,740 >580 - 680 — 15 — — 1 95 56 — 167 Less than 580 — — — — — 13 27 — 40 Total retail loans $ 10,846 $ 7,833 $ 14,019 $ 14,064 $ 33,970 $ 128,091 $ 30,680 $ — $ 239,503
Summary of aging of loan portfolio	The following tables stratify loans held for investment by delinquencies in the Company’s loan portfolio as of the periods indicated: Days Past Due Current 30-59 60-89 90+ Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied $ 2,674,328 $ — $ — $ 757 $ 2,675,085 Multifamily 5,171,355 1 — — 5,171,356 Construction and land 321,993 — — — 321,993 SBA secured by real estate 56,074 — — 1,257 57,331 Total investor loans secured by real estate 8,223,750 1 — 2,014 8,225,765 Business loans secured by real estate CRE owner-occupied 2,108,746 — — 5,304 2,114,050 Franchise real estate secured 347,932 — — — 347,932 SBA secured by real estate 78,036 486 — 1,073 79,595 Total business loans secured by real estate 2,534,714 486 — 6,377 2,541,577 Commercial loans Commercial and industrial 1,765,451 428 57 2,898 1,768,834 Franchise non-real estate secured 444,797 — — — 444,797 SBA not secured by real estate 14,912 338 — 707 15,957 Total commercial loans 2,225,160 766 57 3,605 2,229,588 Retail loans Single family residential 232,559 15 — — 232,574 Consumer loans 6,928 1 — — 6,929 Total retail loans 239,487 16 — — 239,503 Totals $ 13,223,111 $ 1,269 $ 57 $ 11,996 $ 13,236,433 Days Past Due Current 30-59 60-89 90+ Total (Dollars in thousands) December 31, 2019 Investor loans secured by real estate CRE non-owner-occupied $ 2,067,874 $ 1,179 $ — $ 1,088 $ 2,070,141 Multifamily 1,575,726 — — — 1,575,726 Construction and land 438,786 — — — 438,786 SBA secured by real estate 68,041 — — 390 68,431 Total investor loans secured by real estate 4,150,427 1,179 — 1,478 4,153,084 Business loans secured by real estate CRE owner-occupied 1,846,223 331 — — 1,846,554 Franchise real estate secured 353,240 — — — 353,240 SBA secured by real estate 86,946 — 589 846 88,381 Total business loans secured by real estate 2,286,409 331 589 846 2,288,175 Commercial loans Commercial and industrial 1,389,026 422 826 2,996 1,393,270 Franchise non-real estate secured 555,215 — 9,142 — 564,357 SBA not secured by real estate 16,141 167 — 1,118 17,426 Total commercial loans 1,960,382 589 9,968 4,114 1,975,053 Retail loans Single family residential 255,024 — — — 255,024 Consumer loans 50,967 5 2 1 50,975 Total retail loans 305,991 5 2 1 305,999 Totals $ 8,703,209 $ 2,104 $ 10,559 $ 6,439 $ 8,722,311
Summary of Company's investment in impaired loans	The following tables provide a summary of the Company’s investment in impaired loans as of and for the periods indicated: Impaired Loans Recorded Investment Unpaid Principal Balance With Specific Allowance Without Specific Allowance Specific Allowance for Impaired Loans Average Recorded Investment Interest Income Recognized (Dollars in thousands) December 31, 2019 Investor loans secured by real estate CRE non-owner occupied $ 1,088 $ 1,184 $ — $ 1,088 $ — $ 317 $ — Construction and land — — — — — 120 — SBA secured by real estate 390 772 — 390 — 1,002 — Business loans secured by real estate CRE owner-occupied — — — — — 777 — Franchise real estate secured — — — — — 1,887 — SBA secured by real estate 1,517 1,743 — 1,517 — 872 16 Commercial loans Commercial and industrial 7,529 7,755 — 7,529 — 10,251 385 Franchise non-real estate secured 10,834 10,835 — 10,834 — 1,192 151 SBA non-real estate secured 1,118 1,555 — 1,118 — 1,122 — Retail loans Single family residential 366 412 — 366 — 379 — Consumer — — — — — 19 — Totals $ 22,842 $ 24,256 $ — $ 22,842 $ — $ 17,938 $ 552 December 31, 2018 Investor loans secured by real estate CRE non-owner occupied $ — $ — $ — $ — $ — $ 538 $ — Multifamily — — — — — 500 — Construction and land — — — — — 5 — SBA secured by real estate 1,600 6,077 488 1,140 466 1,280 — Business loans secured by real estate CRE owner-occupied 599 628 — 599 — 1,565 — Commercial loans Commercial and industrial 8,523 8,571 550 7,973 118 1,782 36 Franchise non-real estate secured 190 190 — 190 — 119 — SBA non-real estate secured 1,110 1,521 — 1,110 — 534 — Retail loans Single family residential 408 453 — 408 — 1,206 — Consumer — — — — — 33 — Totals $ 12,430 $ 17,440 $ 1,038 $ 11,420 $ 584 $ 7,562 $ 36
Schedule of acquired loans classified as PCD	The following table reconciles the par value, or initial amortized cost, of PCD loans acquired in the Opus acquisition as of the date of the acquisition with the purchase price (or initial fair value of the loans): June 1, 2020 Investor Loans Secured by Real Estate Business Loans Secured by Real Estate Commercial Loans Retail Loans Total Par value (unpaid principal balance) $ 704,441 $ 105,578 $ 80,184 $ 6,280 $ 896,483 Allowance for credit losses (1) (13,786) (4,083) (25,635) (381) (43,885) (Discount) premium related to factors other than credit (8,696) (2,512) 138 (294) (11,364) Purchase price (initial fair value) $ 681,959 $ 98,983 $ 54,687 $ 5,605 $ 841,234 ______________________________ (1) The initial gross ACL determined for PCD loans was $43.9 million as of the acquisition date. Of this amount, approximately $22.7 million relates to net uncollectable balances such as loans that were fully or partially charged off prior to acquisition. Therefore, the net impact to the ACL related to PCD loans was an increase of $21.2 million.
Summary of nonaccrual loans	The following table provides a summary of nonaccrual loans as of the date indicated: Nonaccrual Loans (1) Collateral Dependent Loans ACL Non-Collateral Dependent Loans ACL Total Nonaccrual Loans (2) Nonaccrual Loans with No ACL (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied $ 2,792 $ — $ — $ — $ 2,792 $ 2,792 SBA secured by real estate 1,257 — — — 1,257 1,257 Total investor loans secured by real estate 4,049 — — — 4,049 4,049 Business loans secured by real estate CRE owner-occupied 6,083 — — — 6,083 6,083 SBA secured by real estate 1,143 — — — 1,143 1,143 Total business loans secured by real estate 7,226 — — — 7,226 7,226 Commercial loans Commercial and industrial 2,040 — 1,934 126 3,974 2,733 Franchise non-real estate secured — — 13,238 — 13,238 13,238 SBA non-real estate secured 707 — — — 707 707 Total commercial loans 2,747 — 15,172 126 17,919 16,678 Retail loans Single family residential 15 — — — 15 15 Total retail loans 15 — — — 15 15 Totals nonaccrual loans $ 14,037 $ — $ 15,172 $ 126 $ 29,209 $ 27,968 ______________________________ (1) The ACL for nonaccrual loans is determined based on a discounted cash flow methodology unless the loan is considered collateral dependent. The ACL for collateral dependent loans is determined based on the estimated fair value of the underlying collateral. (2) No interest income was recognized on nonaccrual loans during the year ended December 31, 2020.
Schedule of collateral dependent loans by collateral type	The following table summarizes collateral dependent loans by collateral type as of December 31, 2020: December 31, 2020 Office Properties Industrial Properties Retail Properties Land Properties Hotel Properties Residential Properties Business Assets Total (Dollars in thousands) Investor loan secured by real estate CRE non-owner-occupied $ — $ — $ 2,594 $ — $ 198 $ — $ — $ 2,792 SBA secured by real estate — — — — 1,257 — — 1,257 Total investor loans secured by real estate — — 2,594 — 1,455 — — 4,049 Business loans secured by real estate CRE owner-occupied — 779 — 5,304 — — — 6,083 SBA secured by real estate 288 757 — — — 98 — 1,143 Total business loans secured by real estate 288 1,536 — 5,304 — 98 — 7,226 Commercial loans Commercial and industrial — — — — — — 2,040 2,040 SBA non-real estate secured — — — — — — 707 707 Total commercial loans — — — — — — 2,747 2,747 Retail loans Single family residential — — — — — 15 — 15 Total retail loans — — — — — 15 — 15 Totals collateral dependent loans $ 288 $ 1,536 $ 2,594 $ 5,304 $ 1,455 $ 113 $ 2,747 $ 14,037

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2020
Credit Loss [Abstract]
Summary of allocation of the allowance for credit losses	The following table provides the allocation of the ACL for loans held for investment as well as the activity in the ACL attributed to various segments in the loan portfolio as of, and for the period indicated: For the Year Ended December 31, 2020 Beginning ACL Balance (1) Adoption of ASC 326 Initial ACL Recorded for PCD Loans Charge-offs Recoveries Provision for Credit Losses Ending (Dollars in thousands) Investor loans secured by real estate CRE non-owner occupied $ 1,899 $ 8,423 $ 3,025 $ (839) $ 44 $ 36,624 $ 49,176 Multifamily 729 9,174 8,710 — — 43,921 62,534 Construction and land 4,484 (124) 2,051 (539) — 6,563 12,435 SBA secured by real estate 1,915 (1,401) — (705) 34 5,316 5,159 Business loans secured by real estate CRE owner-occupied 2,781 20,166 3,766 (1,739) 59 25,484 50,517 Franchise real estate secured 592 5,199 — (932) — 6,592 11,451 SBA secured by real estate 2,119 2,207 235 (338) 147 2,197 6,567 Commercial loans Commercial and industrial 13,857 87 2,325 (6,891) 1,818 35,768 46,964 Franchise non-real estate secured 5,816 9,214 — (6,731) 866 11,360 20,525 SBA non-real estate secured 445 218 924 (899) 14 293 995 Retail loans Single family residential 655 541 206 (106) 2 (94) 1,204 Consumer loans 406 1,982 — (139) 4 (1,762) 491 Totals $ 35,698 $ 55,686 $ 21,242 $ (19,858) $ 2,988 $ 172,262 $ 268,018 ______________________________ (1) Beginning ACL balance represents the ALLL accounted for under ASC 450 and ASC 310, which is reflective of probable incurred losses as of the balance sheet date. The following table provides the allocation of the ALLL for loans held for investment as well as the activity attributed to various segments in the loan portfolio as of, and for the period indicated, as determined in accordance with ASC 450 and ASC 310, prior to the adoption of ASC 326: For the Year Ended December 31, 2019 Beginning ALLL Balance Charge-offs Recoveries Provision for Credit Losses Ending (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 1,624 $ (625) $ — $ 900 $ 1,899 Multifamily 740 — — (11) 729 Construction and land 5,964 — — (1,480) 4,484 SBA secured by real estate 1,827 (742) — 830 1,915 Business loans secured by real estate CRE owner-occupied 1,908 (125) 46 952 2,781 Franchise real estate secured 743 (1,377) — 1,226 592 SBA secured by real estate 1,824 (908) 10 1,193 2,119 Commercial loans Commercial and industrial 13,695 (2,318) 189 2,291 13,857 Franchise non-real estate secured 6,066 (1,154) 18 886 5,816 SBA non-real estate secured 654 (588) 68 311 445 Retail loans Single family residential 808 — 2 (155) 655 Consumer loans 219 (16) 11 192 406 Totals $ 36,072 $ (7,853) $ 344 $ 7,135 $ 35,698 For the Year Ended December 31, 2018 Beginning ALLL Balance Charge-offs Recoveries Provision for Credit Losses Ending (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 1,273 $ — $ — $ 351 $ 1,624 Multifamily 614 — — 126 740 Construction and land 5,565 — — 399 5,964 SBA secured by real estate 1,396 — — 431 1,827 Business loans secured by real estate CRE owner-occupied 923 (33) 47 971 1,908 Franchise real estate secured 602 — — 141 743 SBA secured by real estate 901 — — 923 1,824 Commercial loans Commercial and industrial 11,018 (1,411) 698 3,390 13,695 Franchise non-real estate secured 5,191 — — 875 6,066 SBA non-real estate secured 594 (102) 169 (7) 654 Retail loans Single family residential 804 — 13 (9) 808 Consumer loans 55 (409) 8 565 219 Totals $ 28,936 $ (1,955) $ 935 $ 8,156 $ 36,072 The following table presents loans individually and collectively evaluated for impairment and their respective ALLL allocation at December 31, 2019 as determined in accordance with ASC 450 and ASC 310, prior to the adoption of ASC 326: December 31, 2019 Loans Evaluated Individually for Impairment ALLL Attributed to Individually Evaluated Loans Loans Evaluated Collectively for Impairment ALLL Attributed to Collectively Evaluated Loans (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 1,088 $ — $ 2,069,053 $ 1,899 Multifamily — — 1,575,726 729 Construction and land — — 438,786 4,484 SBA secured by real estate 390 — 68,041 1,915 Business loans secured by real estate CRE owner-occupied — — 1,846,554 2,781 Franchise real estate secured — — 353,240 592 SBA secured by real estate 1,517 — 86,864 2,119 Commercial loans Commercial and industrial 7,529 — 1,385,741 13,857 Franchise non-real estate secured 10,834 — 553,523 5,816 SBA non-real estate secured 1,118 — 16,308 445 Retail loans Single family residential 366 — 254,658 655 Consumer loans — — 50,975 406 Totals $ 22,842 $ — $ 8,699,469 $ 35,698
Schedule of allowance for credit quality indicators	The following table stratifies the loans held for investment portfolio by the Company’s internal risk grading, and by year of origination, as of December 31, 2020: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total December 31, 2020 (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied Pass $ 265,901 $ 541,994 $ 440,351 $ 287,580 $ 279,238 $ 791,477 $ 11,114 $ — $ 2,617,655 Special mention — — 6,669 437 2,516 29,738 — — 39,360 Substandard — 9,732 2,045 — 516 5,218 559 — 18,070 Multifamily Pass 1,027,644 1,677,716 899,123 665,939 354,859 531,287 420 — 5,156,988 Special mention — 1,758 2,630 — 8,649 — — — 13,037 Substandard — — — 559 772 — — — 1,331 Construction and land Pass 57,309 144,759 73,313 18,625 20,531 6,672 784 — 321,993 SBA secured by real estate Pass — 8,306 9,029 13,418 6,305 7,696 — — 44,754 Special mention 496 1,032 1,159 1,000 373 306 — — 4,366 Substandard — 1,220 2,959 1,091 400 2,541 — — 8,211 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loans secured by real estate CRE owner-occupied Pass $ 293,324 $ 409,758 $ 332,672 $ 327,475 $ 225,098 $ 469,704 $ 14,268 $ 246 $ 2,072,545 Special mention 2,190 15,917 3,802 — 4,153 201 — — 26,263 Substandard — — 3,636 4,214 1,169 5,973 250 — 15,242 Franchise real estate secured Pass 44,413 81,438 66,241 96,999 24,673 27,020 — — 340,784 Special mention 878 1,650 2,652 — — — — — 5,180 Substandard — — — — 1,968 — — — 1,968 SBA secured by real estate Pass 3,253 7,637 12,608 16,058 8,488 23,624 — — 71,668 Special mention — — 1,200 — 137 — — — 1,337 Substandard — — 184 1,987 1,376 3,043 — — 6,590 Total loans secured by business real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 Commercial Loans Commercial and industrial Pass $ 127,082 $ 260,368 $ 159,001 $ 210,163 $ 51,800 $ 82,291 $ 801,752 $ 9,315 $ 1,701,772 Special mention 735 — 2,331 185 1,320 243 17,890 37 22,741 Substandard — 3,310 2,737 610 1,333 2,446 32,858 1,027 44,321 Franchise non-real estate secured Pass 27,607 164,025 94,494 46,174 40,829 27,745 1,361 502 402,737 Special mention — 7,267 2,037 230 480 2,321 — — 12,335 Substandard — 6,690 3,706 18,425 700 204 — — 29,725 SBA non-real estate secured Pass 407 2,257 1,558 2,674 610 4,449 — 259 12,214 Special mention — — — 1,574 — — — — 1,574 Substandard — 83 357 282 340 400 707 — 2,169 Total commercial loans $ 155,831 $ 444,000 $ 266,221 $ 280,317 $ 97,412 $ 120,099 $ 854,568 $ 11,140 $ 2,229,588 Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total December 31, 2020 (Dollars in thousands) Retail Loans Single family residential Pass $ 10,794 $ 7,714 $ 13,982 $ 14,039 $ 33,968 $ 124,248 $ 27,172 — $ 231,917 Substandard — — — — — 657 — — 657 Consumer loans Pass 52 112 37 25 2 3,145 3,508 — 6,881 Substandard — 7 — — — 41 — — 48 Total retail loans $ 10,846 $ 7,833 $ 14,019 $ 14,064 $ 33,970 $ 128,091 $ 30,680 $ — $ 239,503 Totals gross loans $ 1,862,085 $ 3,354,750 $ 2,140,513 $ 1,729,763 $ 1,072,603 $ 2,152,690 $ 912,643 $ 11,386 $ 13,236,433 The following table stratifies the loan portfolio by the Company’s internal risk rating as of December 31, 2019: Credit Risk Grades Pass Special Substandard Total Gross (Dollars in thousands) December 31, 2019 Investor loans secured by real estate CRE non-owner-occupied $ 2,067,875 $ 1,178 $ 1,088 $ 2,070,141 Multifamily 1,575,510 — 216 1,575,726 Construction and land 438,769 — 17 438,786 SBA secured by real estate 65,835 973 1,623 68,431 Total investor loans secured by real estate 4,147,989 2,151 2,944 4,153,084 Business loans secured by real estate CRE owner-occupied 1,831,853 11,167 3,534 1,846,554 Franchise real estate secured 352,319 921 — 353,240 SBA secured by real estate 83,106 1,842 3,433 88,381 Total business loans secured by real estate 2,267,278 13,930 6,967 2,288,175 Commercial loans Commercial and industrial 1,359,662 13,226 20,382 1,393,270 Franchise non-real estate secured 546,594 6,930 10,833 564,357 SBA not secured by real estate 13,933 485 3,008 17,426 Total commercial loans 1,920,189 20,641 34,223 1,975,053 Retail loans Single family residential 254,463 — 561 255,024 Consumer loans 50,921 — 54 50,975 Total retail loans 305,384 — 615 305,999 Total gross loans $ 8,640,840 $ 36,722 $ 44,749 $ 8,722,311 The following table presents PD bands for commercial real estate and commercial loan segments of the loan portfolio as of the date indicated. Commercial Real Estate Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied 0% - 5.00% $ 261,885 $ 491,522 $ 431,791 $ 266,942 $ 254,527 $ 763,101 $ 11,114 $ — $ 2,480,882 >5.00% - 10.00% 4,016 34,360 5,794 10,558 16,961 33,734 — — 105,423 Greater than 10% — 25,844 11,480 10,517 10,782 29,598 559 — 88,780 Multifamily 0% - 5.00% 950,089 1,610,011 878,233 634,268 349,549 516,452 — — 4,938,602 >5.00% - 10.00% 38,892 59,500 12,181 19,751 10,917 13,606 — — 154,847 Greater than 10% 38,663 9,963 11,339 12,479 3,814 1,229 420 — 77,907 Construction and Land 0% - 5.00% 55,785 40,860 4,604 11,238 — 6,412 784 — 119,683 >5.00% - 10.00% 1,123 41,046 9,197 3,601 — 260 — — 55,227 Greater than 10% 401 62,853 59,512 3,786 20,531 — — — 147,083 SBA secured by real estate 0% - 5.00% 496 10,400 12,558 14,497 7,078 10,032 — — 55,061 >5.00% - 10.00% — — — 1,012 — — — — 1,012 Greater than 10% — 158 589 — — 511 — — 1,258 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loans secured by real estate CRE owner-occupied 0% - 5.00% $ 286,745 $ 367,269 $ 274,512 $ 295,809 $ 202,282 $ 422,614 $ 10,393 $ 246 $ 1,859,870 >5.00% - 10.00% 8,769 42,310 60,222 28,421 23,875 44,855 3,875 — 212,327 Greater than 10% — 16,096 5,376 7,459 4,263 8,409 250 — 41,853 Franchise real estate secured 0% - 5.00% 37,262 79,926 65,619 96,672 19,046 22,927 — — 321,452 >5.00% - 10.00% 7,587 1,650 3,274 327 5,627 4,093 — — 22,558 Greater than 10% 442 1,512 — — 1,968 — — — 3,922 SBA secured by real estate 0% - 5.00% 3,253 7,637 11,840 15,069 5,707 18,742 — — 62,248 >5.00% - 10.00% — — 768 989 2,780 4,882 — — 9,419 Greater than 10% — — 1,384 1,987 1,514 3,043 — — 7,928 Total business loans secured by real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 Commercial Real Estate Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Commercial Loans Commercial and industrial 0% - 5.00% $ 70,233 $ 205,395 $ 99,178 $ 193,046 $ 36,957 $ 62,682 $ 394,124 $ 5,051 $ 1,066,666 >5.00% - 10.00% 49,883 50,743 35,813 13,427 12,922 13,948 322,123 2,469 501,328 Greater than 10% 7,701 7,540 29,078 4,485 4,574 8,350 136,253 2,859 200,840 Franchise non-real estate secured 0% - 5.00% 21,409 145,392 88,171 38,010 21,956 23,479 — 502 338,919 >5.00% - 10.00% 6,198 15,754 5,454 8,164 18,415 3,626 — — 57,611 Greater than 10% — 16,836 6,612 18,655 1,638 3,165 1,361 — 48,267 SBA not secured by real estate 0% - 5.00% 407 2,257 910 1,078 441 2,782 — — 7,875 >5.00% - 10.00% — — 648 1,596 169 1,652 — 259 4,324 Greater than 10% — 83 357 1,856 340 415 707 — 3,758 Total commercial loans $ 155,831 $ 444,000 $ 266,221 $ 280,317 $ 97,412 $ 120,099 $ 854,568 $ 11,140 $ 2,229,588 A significant driver in the ACL for loans in the investor real estate secured and business real estate secured segments is loan to value (“LTV”). The following table summarizes the amortized cost of loans in these segments by current estimated LTV and by year of origination as of the date indicated: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Investor loans secured by real estate CRE non-owner-occupied 55% and below $ 138,007 $ 229,272 $ 182,385 $ 136,355 $ 189,848 $ 588,230 $ 11,114 $ — $ 1,475,211 >55-65% 101,434 217,210 92,015 130,024 78,470 204,161 559 — 823,873 >65-75% 26,460 102,494 169,878 18,876 13,952 29,506 — — 361,166 Greater than 75% — 2,750 4,787 2,762 — 4,536 — — 14,835 Multifamily 55% and below 218,833 345,519 294,464 233,997 84,530 269,906 — — 1,447,249 >55-65% 381,737 731,408 381,282 215,170 152,066 189,151 420 — 2,051,234 >65-75% 427,074 583,078 215,389 215,452 127,684 66,457 — — 1,635,134 Greater than 75% — 19,469 10,618 1,879 — 5,773 — — 37,739 Construction and land 55% and below 57,309 105,308 36,068 18,625 20,531 6,672 784 — 245,297 >55-65% — 36,113 23,770 — — — — — 59,883 >65-75% — 3,338 13,475 — — — — — 16,813 Greater than 75% — — — — — — — — — SBA secured by real estate 55% and below — 2,066 649 673 317 778 — — 4,483 >55-65% — 2,427 1,639 4,008 879 4,354 — — 13,307 >65-75% — 3,897 3,882 3,482 4,519 1,884 — — 17,664 Greater than 75% 496 2,168 6,977 7,346 1,363 3,527 — — 21,877 Total investor loans secured by real estate $ 1,351,350 $ 2,386,517 $ 1,437,278 $ 988,649 $ 674,159 $ 1,374,935 $ 12,877 $ — $ 8,225,765 Business loan secured by real estate CRE owner-occupied 55% and below $ 96,803 $ 160,605 $ 157,868 $ 179,791 $ 131,795 $ 328,188 $ 14,518 $ 246 $ 1,069,814 >55-65% 72,044 91,028 98,176 94,712 65,120 90,548 — — 511,628 >65-75% 71,692 152,920 79,106 43,832 31,303 31,493 — — 410,346 Greater than 75% 54,975 21,122 4,960 13,354 2,202 25,649 — — 122,262 Franchise real estate secured 55% and below 20,801 10,470 13,864 20,956 9,189 16,213 — — 91,493 >55-65% 2,689 9,955 16,001 19,102 6,855 2,333 — — 56,935 >65-75% 19,349 51,719 23,258 9,153 10,597 7,236 — — 121,312 Greater than 75% 2,452 10,944 15,770 47,788 — 1,238 — — 78,192 SBA secured by real estate 55% and below 1,825 1,626 5,332 5,495 3,615 13,582 — — 31,475 >55-65% 246 513 1,795 1,094 3,586 5,448 — — 12,682 >65-75% 264 3,142 1,515 3,968 1,586 4,043 — — 14,518 Greater than 75% 918 2,356 5,350 7,488 1,214 3,594 — — 20,920 Total business loans secured by real estate $ 344,058 $ 516,400 $ 422,995 $ 446,733 $ 267,062 $ 529,565 $ 14,518 $ 246 $ 2,541,577 The following table presents FICO bands for the retail segment of the loan portfolio as of the date indicated: Term Loans by Vintage 2020 2019 2018 2017 2016 Prior Revolving Revolving Converted to Term During the Period Total (Dollars in thousands) December 31, 2020 Retail Loans Single family residential Greater than 740 $ 10,794 $ 6,531 $ 12,679 $ 8,846 $ 28,222 $ 81,838 $ 19,588 $ — $ 168,498 >680 - 740 — 1,183 1,303 4,732 2,614 15,624 6,685 — 32,141 >580 - 680 — — — 461 3,132 7,473 864 — 11,930 Less than 580 — — — — — 19,970 35 — 20,005 Consumer loans Greater than 740 52 69 31 22 1 2,609 2,198 — 4,982 >680 - 740 — 35 6 3 — 469 1,227 — 1,740 >580 - 680 — 15 — — 1 95 56 — 167 Less than 580 — — — — — 13 27 — 40 Total retail loans $ 10,846 $ 7,833 $ 14,019 $ 14,064 $ 33,970 $ 128,091 $ 30,680 $ — $ 239,503

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	12 Months Ended
	Dec. 31, 2020
Other Real Estate [Abstract]
Summary of the activity in the other real estate owned	The following table summarizes the activity in other real estate owned for the years ended December 31: 2020 2019 2018 (Dollars in thousands) Balance, beginning of year $ 441 $ 147 $ 326 Additions: Acquisitions — — 524 Foreclosures 208 644 15 Sales (537) (329) (1,055) Gain (loss) on sale (57) (20) 346 Write downs (55) (1) (9) Balance, end of year $ — $ 441 $ 147

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of components of premises and equipment	The Company’s premises and equipment consisted of the following at December 31: 2020 2019 (Dollars in thousands) Land $ 16,090 $ 13,820 Premises 20,371 16,697 Leasehold improvements 36,634 25,884 Furniture, fixtures, and equipment 48,723 33,871 Automobiles 185 173 Subtotal 122,003 90,445 Less: accumulated depreciation 43,119 31,444 Total $ 78,884 $ 59,001

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	The following table presents changes in the carrying value of goodwill for the periods indicated: 2020 2019 2018 (Dollars in thousands) Balance, beginning of year $ 808,322 $ 808,726 $ 493,329 Goodwill acquired during the year 92,844 — 313,043 Purchase accounting adjustments (2,597) (404) 2,354 Balance, end of year $ 898,569 $ 808,322 $ 808,726 Accumulated impairment losses at end of year $ — $ — $ —
Schedule of net intangible assets	The following table summarizes the change in the balance of core deposit intangibles and customer relationship intangible assets, and the related accumulated amortization for the periods indicated below: 2020 2019 2018 (Dollars in thousands) Gross balance of intangible assets: Balance, beginning of year $ 125,945 $ 125,945 $ 54,809 Additions due to acquisitions 19,267 — 71,136 Balance, end of year 145,212 125,945 125,945 Accumulated amortization: Balance, beginning of year (42,633) (25,389) (11,795) Amortization (17,072) (17,244) (13,594) Balance, end of year (59,705) (42,633) (25,389) Net intangible assets, end of year $ 85,507 $ 83,312 $ 100,556

Investments in Qualified Affo_2

Investments in Qualified Affordable Housing Partnerships (Tables)	12 Months Ended
	Dec. 31, 2020
Federal Home Loan Banks [Abstract]
Summary of estimates for unfunded affordable housing commitments	As of December 31, 2020, the Company’s unfunded affordable housing partnerships commitments were estimated to be paid as follows: Amount Year Ending December 31, (Dollars in thousands) 2021 $ 10,548 2022 4,627 2023 1,032 2024 492 2025 250 Thereafter 1,129 Total unfunded commitments $ 18,078 The following table presents tax credits and other tax benefits generated by operating losses from qualified affordable housing projects as well as amortization expense associated with these investments for the years ended December 31, 2020, 2019, and 2018. 2020 2019 2018 (Dollars in thousands) Tax credit and other tax benefits recognized $ 11,435 $ 6,506 $ 4,748 Amortization of investments 9,674 5,527 4,574

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of variable interest entities	The following table provides a summary of the carrying amount of assets and liabilities in the Company’s consolidated balance sheet and maximum loss exposures as of December 31, 2020 and December 31, 2019 that relate to variable interests in non-consolidated VIEs. December 31, 2020 December 31, 2019 Maximum Loss Assets Liabilities Maximum Loss Assets Liabilities (Dollars in thousands) Multifamily loan securitization: Investment securities (1) $ 100,927 $ 100,927 $ — $ — $ — $ — Reimbursement obligation (2) 50,901 — 448 — — — Affordable housing partnership: Other investments (3) 71,681 89,759 — 32,466 53,880 — Unfunded equity commitments (2) — — 18,078 — — 21,414 Total $ 223,509 $ 190,686 $ 18,526 $ 32,466 $ 53,880 $ 21,414 ______________________________ (1) Included in investment securities available-for-sale on the consolidated statement of financial condition. (2) Included in accrued expenses and other liabilities on the consolidated statement of financial condition.

Deposit Accounts (Tables)

Deposit Accounts (Tables)	12 Months Ended
	Dec. 31, 2020
Deposits Liabilities [Abstract]
Schedule of components of deposit accounts and weighted average interest rates	Deposit accounts and weighted average interest rates consisted of the following at December 31: 2020 2019 Amount Weighted Amount Weighted (Dollars in thousands) Noninterest-bearing checking $ 6,011,106 — % $ 3,857,660 — % Interest-bearing checking 2,913,260 0.06 % 586,019 0.43 % Money market 5,302,073 0.23 % 3,171,164 0.83 % Savings 360,896 0.09 % 235,824 0.16 % Certificates of deposit accounts $250,000 or less 800,957 0.88 % 500,331 1.59 % Greater than $250,000 825,885 0.88 % 547,511 1.77 % Total certificates of deposit accounts 1,626,842 0.88 % 1,047,842 1.69 % Total deposits $ 16,214,177 0.18 % $ 8,898,509 0.53 %
Schedule of aggregate annual maturities of certificates of deposit accounts	The aggregate annual maturities of certificates of deposit accounts at December 31, 2020 are as follows: 2020 Amount Weighted Average Interest Rate (Dollars in thousands) Within 3 months $ 692,493 0.81 % 4 to 6 months 363,533 1.12 % 7 to 12 months 377,731 0.89 % 13 to 24 months 86,934 0.82 % 25 to 36 months 13,217 1.56 % 37 to 60 months 9,576 1.24 % Over 60 months 83,358 0.35 % Total $ 1,626,842 0.88 %
Schedule of interest expense on deposit accounts	Interest expense on deposit accounts for the years ended December 31 is summarized as follows: 2020 2019 2018 (Dollars in thousands) Checking accounts $ 3,295 $ 2,340 $ 1,167 Money market accounts 19,903 28,279 19,567 Savings 393 382 357 Certificates of deposit accounts 10,745 27,296 16,562 Total $ 34,336 $ 58,297 $ 37,653

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances and Other Borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Advances from Federal Home Loan Banks [Abstract]
Summary of activities in advances from the FHLB	The following table summarizes activities in advances from the FHLB for the periods indicated: Year Ended December 31, 2020 2019 (Dollars in thousands) Average balance outstanding $ 139,190 $ 404,959 Weighted average rate 1.10 % 2.43 % Maximum amount outstanding at any month-end during the year $ 521,017 $ 1,091,596 Balance outstanding at end of year 31,000 517,026 Weighted average interest rate at year-end 1.53 % 1.69 %
Summary of activities in other borrowings	The following table summarizes activities in other borrowings for the periods indicated: Year Ended December 31, 2020 2019 (Dollars in thousands) Average balance outstanding $ 251 $ 229 Weighted average rate 0.16 % 0.63 % Maximum amount outstanding at any month-end during the year $ 5,000 $ 10,000 Balance outstanding at end of year — — Weighted average interest rate at year-end — % — % The following table summarizes our outstanding subordinated debentures as of December 31: 2020 2019 Stated Maturity Current Interest Rate Current Principal Balance Carrying Value (Dollars in thousands) Subordinated notes Subordinated notes due 2024, 5.75% per annum September 3, 2024 5.75 % $ 60,000 $ 59,552 $ 59,432 Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter May 15, 2029 4.875 % 125,000 122,877 122,622 Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter June 15, 2030 5.375 % 150,000 147,501 — Subordinated notes due 2025, 7.125% per annum June 26, 2025 7.125 % 25,000 25,109 25,133 Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter July 1, 2026 5.50 % 135,000 138,371 — Total subordinated notes 495,000 493,410 207,187 Subordinated debt Heritage Oaks Capital Trust II (junior subordinated debt), 3-month LIBOR+1.72% January 1, 2037 1.95 % 5,248 4,121 4,054 Santa Lucia Bancorp (CA) Capital Trust (junior subordinated debt), 3-month LIBOR+1.48% July 7, 2036 1.72 % 5,155 3,980 3,904 Total subordinated debt 10,403 8,101 7,958 Total subordinated debentures $ 505,403 $ 501,511 $ 215,145

Subordinated Debentures (Tables

Subordinated Debentures (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of outstanding subordinated debentures	The following table summarizes activities in other borrowings for the periods indicated: Year Ended December 31, 2020 2019 (Dollars in thousands) Average balance outstanding $ 251 $ 229 Weighted average rate 0.16 % 0.63 % Maximum amount outstanding at any month-end during the year $ 5,000 $ 10,000 Balance outstanding at end of year — — Weighted average interest rate at year-end — % — % The following table summarizes our outstanding subordinated debentures as of December 31: 2020 2019 Stated Maturity Current Interest Rate Current Principal Balance Carrying Value (Dollars in thousands) Subordinated notes Subordinated notes due 2024, 5.75% per annum September 3, 2024 5.75 % $ 60,000 $ 59,552 $ 59,432 Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter May 15, 2029 4.875 % 125,000 122,877 122,622 Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter June 15, 2030 5.375 % 150,000 147,501 — Subordinated notes due 2025, 7.125% per annum June 26, 2025 7.125 % 25,000 25,109 25,133 Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter July 1, 2026 5.50 % 135,000 138,371 — Total subordinated notes 495,000 493,410 207,187 Subordinated debt Heritage Oaks Capital Trust II (junior subordinated debt), 3-month LIBOR+1.72% January 1, 2037 1.95 % 5,248 4,121 4,054 Santa Lucia Bancorp (CA) Capital Trust (junior subordinated debt), 3-month LIBOR+1.48% July 7, 2036 1.72 % 5,155 3,980 3,904 Total subordinated debt 10,403 8,101 7,958 Total subordinated debentures $ 505,403 $ 501,511 $ 215,145
Schedule of summarizes activities for our subordinated debentures	The following table summarizes activities for our subordinated debentures for the periods indicated: Year Ended December 31, 2020 2019 (Dollars in thousands) Average balance outstanding $ 377,037 $ 183,383 Weighted average rate 5.48 % 5.82 % Maximum amount outstanding at any month-end during the year 501,511 233,199 Balance outstanding at end of year 501,511 215,145 Weighted average interest rate at year-end 5.38 % 5.37 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of components of income tax expense	The following presents the components of income tax expense for the years ended December 31: 2020 2019 2018 (Dollars in thousands) Current income tax provision: Federal $ 32,129 $ 34,124 $ 19,787 State 22,743 16,415 13,178 Total current income tax provision 54,872 50,539 32,965 Deferred income tax (benefit) provision: Federal (26,554) 4,645 8,142 Effect of the Tax Act — — (1,441) State (16,068) 2,851 2,574 Total deferred income tax (benefit) provision (42,622) 7,496 9,275 Total income tax provision $ 12,250 $ 58,035 $ 42,240
Schedule of reconciliation from statutory federal income taxes to the Company's effective income taxes	A reconciliation from statutory federal income taxes, which are based on a statutory rate of 21% for 2020, 2019, and 2018, to the Company’s total effective income tax provisions for the years ended December 31 is as follows: 2020 2019 2018 (Dollars in thousands) Statutory federal income tax provision $ 15,246 $ 45,729 $ 34,803 State taxes, net of federal income tax effect 4,757 15,764 12,724 Cash surrender life insurance (1,163) (565) (582) Tax exempt interest (4,073) (1,503) (1,135) Non-deductible merger costs 703 — 375 LIHTC investments (2,259) (1,570) (761) Effect of the Tax Act — — (1,441) Stock-based compensation shortfall (windfall) tax impact 407 (728) (1,811) Effect of the CARES Act (2,636) — — Section 162(m) of the Internal Revenue Code 968 530 145 Other 300 378 (77) Total income tax provision $ 12,250 $ 58,035 $ 42,240
Schedule of deferred tax assets (liabilities) comprised of the temporary differences between the financial statement carrying amounts and the tax basis of assets	Deferred tax assets (liabilities) were comprised of the following temporary differences between the financial statement carrying amounts and the tax basis of assets at December 31: 2020 2019 (Dollars in thousands) Deferred tax assets: Accrued expenses $ 1,307 $ 2,126 Net operating loss 6,614 4,765 Allowance for credit losses, net of bad debt charge-offs 85,700 10,415 Deferred compensation 3,489 3,616 State taxes 4,395 3,746 Loan discount 32,484 11,634 Stock-based compensation 4,618 3,535 Operating lease liabilities 24,463 13,334 Federal and state credit carryovers 3,750 416 Other 1,782 — Total deferred tax assets 168,602 53,587 Deferred tax liabilities: Operating lease right-of-use assets $ (21,756) $ (12,382) Deferred FDIC gain (108) (228) Core deposit intangibles (21,828) (22,415) Loan origination costs (5,176) (4,828) Depreciation (6,551) (1,814) Unrealized gain on available for sale securities (24,127) (8,639) Other — (4,652) Total deferred tax liabilities (79,546) (54,958) Valuation allowance — — Net deferred tax asset (liabilities) $ 89,056 $ (1,371)
Reconciliation of unrecognized tax benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2020 and 2019 is as follows: 2020 2019 (Dollars in thousands) Balance at January 1, $ 2,906 $ 2,906 Increases based on tax positions related to prior years 233 — Decreases related to lapse of statute of limitation (2,884) — Balance at December 31, $ 255 $ 2,906

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Summary of the stock option activities in the Plans	Below is a summary of the stock option activity in the Plans for the year ended December 31, 2020: 2020 Number of Stock Options Outstanding Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic value (in years) (Dollars in thousands) Outstanding at January 1, 2020 453,104 $ 16.26 Granted 9,538 22.22 Exercised (139,739) 19.94 Forfeited and expired (13,588) 20.85 Outstanding at December 31, 2020 309,315 $ 16.84 3.87 $ 4,480 Vested and exercisable at December 31, 2020 309,315 $ 16.84 3.87 $ 4,480
Schedule of Other Share-based Compensation, Activity	Below is a summary of the activity for restricted stock and restricted stock units in the Plans for the years ended December 31, 2020: 2020 Shares Weighted Average Grant-Date Fair Value Per Share Unvested at the beginning of the year 739,933 $ 35.11 Granted 782,450 20.02 Vested (182,497) 33.78 Forfeited (70,642) 28.85 Unvested at the end of the year 1,269,244 $ 26.35

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Company's assets measured at fair value on a recurring basis	The following fair value hierarchy tables present information about the Company’s assets measured at fair value on a recurring basis at the dates indicated: At December 31, 2020 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at (Dollars in thousands) Financial assets Investment securities available-for-sale: U.S. Treasury $ — $ 32,533 $ — $ 32,533 Agency — 690,386 — 690,386 Corporate — 415,308 — 415,308 Municipal bonds — 1,446,019 — 1,446,019 Collateralized mortgage obligation: residential — 513,366 — 513,366 Mortgage-backed securities: residential — 833,503 — 833,503 Total securities available-for-sale $ — $ 3,931,115 $ — $ 3,931,115 Derivative assets: Interest rate swaps $ — $ 12,053 $ — $ 12,053 Equity warrants — — 1,914 1,914 Total derivative assets $ — $ 12,053 $ 1,914 $ 13,967 Financial liabilities Derivative liabilities $ — $ 12,066 $ — $ 12,066 At December 31, 2019 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at (Dollars in thousands) Financial assets Investment securities available-for-sale: U.S. Treasury $ — $ 63,555 $ — $ 63,555 Agency — 246,358 $ — 246,358 Corporate — 151,353 $ — 151,353 Municipal bonds — 397,298 — 397,298 Collateralized mortgage obligation: residential — 9,984 — 9,984 Mortgage-backed securities: residential — 499,836 — 499,836 Total securities available-for-sale $ — $ 1,368,384 $ — $ 1,368,384 Derivative assets $ — $ 2,103 $ — $ 2,103 Financial liabilities Derivative liabilities $ — $ 2,103 $ — $ 2,103
Schedule of reconciliation of fair value of equity warrants	The following table is a reconciliation of the fair value of the equity warrants that are classified as Level 3 and measured on a recurring basis as of: 2020 (Dollars in thousands) Beginning Balance as of June 1, 2020 $ 5,162 Change in fair value (1) (41) Sales (3,207) Ending balance as of December 31, 2020 $ 1,914 ______________________________ (1) The changes in fair value are included in other income on the consolidated statement of income.
Schedule of quantitative information for level 3 fair value measurements	The following table presents quantitative information about level 3 of fair value measurements for assets measured at fair value on a recurring basis at December 31, 2020. December 31, 2020 Range Fair Value Valuation Technique(s) Unobservable Input(s) Min Max Weighted Average (Dollars in thousands) Equity warrants $ 1,914 Black-Scholes Volatility 30.00% 0.13% 6.00% 35.00% 0.36% 16.00% 31.19% 0.18% 13.51% The following table presents quantitative information about level 3 of fair value measurements for assets measured at fair value on a nonrecurring basis at December 31, 2020 and 2019. December 31, 2020 Range Fair Value Valuation Technique(s) Unobservable Input(s) Min Max Weighted Average (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 198 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% SBA secured by real estate (1) 746 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% Business loans secured by real estate SBA secured by real estate (2) 386 Fair value of collateral Collateral discount and cost to sell 7.00% 10.00% 9.09% Commercial loans Commercial and industrial 2,040 Fair value of collateral Collateral discount and cost to sell 7.00% 10.00% 9.06% SBA non-real estate secured 707 Fair value of collateral Collateral discount and cost to sell 7.00% 7.00% 7.00% Total individually evaluated loans $ 4,077 December 31, 2019 Range Fair Value Valuation Technique(s) Unobservable Input(s) Min Max Weighted Average (Dollars in thousands) Investor loans secured by real estate CRE non-owner-occupied $ 569 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% SBA secured by real estate (1) 408 Fair value of collateral Collateral discount and cost to sell 10.00% 10.00% 10.00% Business loans secured by real estate SBA secured by real estate (2) 140 Fair value of collateral Collateral discount and cost to sell 7.00% 10.00% 7.81% Commercial loans SBA non-real estate secured 1,140 Fair value of collateral Collateral discount and cost to sell 7.00% 63.00% 15.33% Total individually evaluated loans $ 2,257 ______________________________ (1) SBA loans that are collateralized by hotel/motel real property. (2) SBA loans that are collateralized by real property other than hotel/motel real property.
Summary of assets measured at fair value on a nonrecurring basis	The following table presents our assets measured at fair value on a nonrecurring basis at December 31, 2020 and 2019. At December 31, 2020 Level 1 Level 2 Level 3 Total (Dollars in thousands) Financial assets Individually evaluated loans $ — $ — $ 4,077 $ 4,077 At December 31, 2019 Level 1 Level 2 Level 3 Total (Dollars in thousands) Financial assets Impaired loans $ — $ — $ 2,257 $ 2,257
Schedule of carrying amount and estimated fair value of financial instruments	The fair value estimates presented herein are based on pertinent information available to management as of the dates indicated, representing an exit price. At December 31, 2020 Carrying Level 1 Level 2 Level 3 Estimated (Dollars in thousands) Assets: Cash and cash equivalents $ 880,766 $ 880,766 $ — $ — $ 880,766 Interest-bearing time deposits with financial institutions 2,845 2,845 — — 2,845 Investments held-to-maturity 23,732 — 25,013 — 25,013 Investment securities available-for-sale 3,931,115 — 3,931,115 — 3,931,115 Loans held for sale 601 — 645 — 645 Loans held for investment, net 13,236,433 — — 13,351,092 13,351,092 Derivative asset 13,967 — 12,053 1,914 13,967 Accrued interest receivable 74,574 74,574 — — 74,574 Liabilities: Deposit accounts 16,214,177 14,587,335 1,631,047 — 16,218,382 FHLB advances 31,000 — 31,564 — 31,564 Subordinated debentures 501,511 — 544,436 — 544,436 Derivative liability 12,066 — 12,066 — 12,066 Accrued interest payable 6,569 6,569 — — 6,569 At December 31, 2019 Carrying Level 1 Level 2 Level 3 Estimated (Dollars in thousands) Assets: Cash and cash equivalents $ 326,850 $ 326,850 $ — $ — $ 326,850 Interest-bearing time deposits with financial institutions 2,708 2,708 — — 2,708 Investments held-to-maturity 37,838 — 38,760 — 38,760 Investment securities available-for-sale 1,368,384 — 1,368,384 — 1,368,384 Loans held for sale 1,672 — 1,821 — 1,821 Loans held for investment, net 8,722,311 — — 8,691,019 8,691,019 Derivative asset 2,103 — 2,103 — 2,103 Accrued interest receivable 39,442 39,442 — — 39,442 Liabilities: Deposit accounts 8,898,509 7,850,667 1,048,583 — 8,899,250 FHLB advances 517,026 — 517,291 — 517,291 Subordinated debentures 215,145 — 237,001 — 237,001 Derivative liability 2,103 — 2,103 — 2,103 Accrued interest payable 2,686 2,686 — — 2,686

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of Company's unaudited earnings per share calculations	The following tables set forth the Company’s earnings per share calculations for the periods indicated: For the Year Ended December 31, 2020 2019 2018 (Dollars in thousands, except per share data) Basic Net income $ 60,351 $ 159,718 $ 123,340 Less: Dividends and earnings allocated to participating securities (798) (1,650) — Net income allocated to common stockholders $ 59,553 $ 158,068 $ 123,340 Weighted average common shares outstanding 79,209,560 60,339,714 53,963,047 Basic earnings per common share $ 0.75 $ 2.62 $ 2.29 Diluted Net income allocated to common stockholders $ 59,553 $ 158,068 $ 123,340 Weighted average common shares outstanding 79,209,560 60,339,714 53,963,047 Dilutive effect of share-based compensation 287,513 352,567 650,010 Dilutive effect of stock warrants 9,201 — — Weighted average diluted common shares 79,506,274 60,692,281 54,613,057 Diluted earnings per common share $ 0.75 $ 2.60 $ 2.26

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following tables summarize the Company’s derivative instruments, included in “other assets” and “other liabilities” in the consolidated statements of financial condition. December 31, 2020 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 145,181 $ 12,053 $ 145,181 $ 12,066 Equity warrants — 1,914 — — Total derivative instruments $ 145,181 $ 13,967 $ 145,181 $ 12,066 December 31, 2019 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (Dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 76,314 $ 2,103 $ 76,314 $ 2,103 Total derivative instruments $ 76,314 $ 2,103 $ 76,314 $ 2,103 The following table summarizes the effect of the derivative financial instruments in the consolidated statements of income. For the Year Ended December 31, Derivative Not Designated as Hedging Instruments: Location of Gain Recognized in Income on Derivative Instruments 2020 2019 2018 (Dollars in thousands) Other contracts Other income $ 494 $ — $ — Equity warrants Other income (42) — — Total $ 452 $ — $ —

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	12 Months Ended
	Dec. 31, 2020
Offsetting [Abstract]
Offsetting Assets and Liabilities	Financial instruments that are eligible for offset in the consolidated statements of financial condition as of December 31, 2020 are presented in the table below: December 31, 2020 Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (Dollars in thousands) Financial assets: Derivatives not designated as hedging instruments $ 12,053 $ — $ 12,053 $ — $ — $ 12,053 Total $ 12,053 $ — $ 12,053 $ — $ — $ 12,053 Financial liabilities: Derivatives not designated as hedging instruments $ 12,066 $ — $ 12,066 $ (6,140) $ (5,926) $ — Total $ 12,066 $ — $ 12,066 $ (6,140) $ (5,926) $ — (1) Represents cash collateral held with counterparty bank. December 31, 2019 Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (Dollars in thousands) Financial assets: Derivatives not designated as hedging instruments $ 2,103 $ — $ 2,103 $ — $ — $ 2,103 Total $ 2,103 $ — $ 2,103 $ — $ — $ 2,103 Financial liabilities: Derivatives not designated as hedging instruments $ 2,107 $ (4) $ 2,103 $ — $ (1,678) $ 425 Total $ 2,107 $ (4) $ 2,103 $ — $ (1,678) $ 425 (1) Represents cash collateral held with counterparty bank.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Summary of Company's Revenue Streams	The following table provides a summary of the Company’s noninterest income, segregated by revenue streams within and outside the scope of ASC 606 for the periods indicated: For the Year Ended December 31, 2020 2019 2018 Within Scope (1) Out-of-Scope (2) Within Scope (1) Out-of-Scope (2) Within Scope (1) Out-of-Scope (2) (Dollars in thousands) Noninterest income: Loan servicing income $ — $ 2,028 $ — $ 1,840 $ — $ 1,445 Service charges on deposit accounts 6,712 — 5,769 — 5,128 — Other service fee income 1,554 — 1,438 — 902 — Debit card interchange income 2,526 — 3,004 — 4,326 — Earnings on bank-owned life insurance — 7,160 — 3,486 — 3,427 Net gain from sales of loans — 8,609 — 6,642 — 10,759 Net gain from sales of investment securities — 13,882 — 8,571 — 1,399 Trust custodial account fees 16,653 — — — — — Other income 3,090 9,111 1,015 3,471 1,242 2,399 Total noninterest income $ 30,535 $ 40,790 $ 11,226 $ 24,010 $ 11,598 $ 19,429 ______________________________ (1) Revenues from contracts with customers accounted for under ASC 606. (2) Revenues not within the scope of ASC 606 and accounted for under other applicable GAAP requirements.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Components of Lease Expense	The Company’s lease expense is recorded in premises and occupancy expense in the consolidated statements of income. The following table presents the components of lease expense for the periods indicated: For the Year Ended December 31, 2020 2019 (Dollars in thousands) Operating leases $ 18,065 $ 11,685 Short-term leases 2,031 2,369 Total lease expense $ 20,096 $ 14,054
Schedule of supplemental information	The following tables present supplemental information related to operating leases as of and for year ended: December 31, 2020 December 31, 2019 (Dollars in thousands) Balance Sheet: Operating lease right-of-use assets $ 76,090 $ 43,177 Operating lease liabilities 85,556 46,498 For the Year Ended December 31, 2020 2019 (Dollars in thousands) Cash Flows: Operating cash flows from operating leases 16,528 11,747
Schedule of minimum contractual lease payments and other information	The following tables provide information related to minimum contractual lease payments and other information associated with the Company’s leases as of December 31, 2020 and December 31, 2019: 2021 2022 2023 2024 2025 Thereafter Total (Dollars in thousands) December 31, 2020 Contractual base rents (1) : Operating leases $ 21,042 $ 19,569 $ 18,361 $ 16,113 $ 10,991 $ 13,009 $ 99,085 Short-term leases 215 — — — — — 215 Total contractual base rents $ 21,257 $ 19,569 $ 18,361 $ 16,113 $ 10,991 $ 13,009 $ 99,300 Total liability to make lease payments $ 85,556 Difference in undiscounted and discounted future lease payments 13,744 Weighted average discount rate 5.73 % Weighted average remaining lease term (years) 5.3 2020 2021 2022 2023 2024 Thereafter Total (Dollars in thousands) December 31, 2019 Contractual base rents (1) : Operating leases $ 10,138 $ 10,602 $ 10,137 $ 9,055 $ 7,318 $ 7,265 $ 54,515 Short-term leases 143 7 — — — — 150 Total contractual base rents $ 10,281 $ 10,609 $ 10,137 $ 9,055 $ 7,318 $ 7,265 $ 54,665 Total liability to make lease payments $ 46,498 Difference in undiscounted and discounted future lease payments 8,167 Weighted average discount rate 6.13 % Weighted average remaining lease term (years) 5.4 (1) Contractual base rents reflect options to extend and renewals, and do not include property taxes and other operating expenses due under respective lease agreements.

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Summary of selected financial data by quarter	The following is a summary of selected financial data presented below by quarter for the periods indicated: First Second Third Fourth (Dollars in thousands, except per share data) For the year ended December 31, 2020: Interest income $ 123,789 $ 144,122 $ 181,991 $ 180,824 Interest expense 14,614 13,830 15,445 12,626 Provision for credit losses 25,454 160,635 4,210 1,517 Noninterest income 14,475 6,898 26,758 23,194 Noninterest expense 66,631 115,970 98,579 99,939 Income tax expense (benefit) 5,825 (40,324) 23,949 22,800 Net income (loss) $ 25,740 $ (99,091) $ 66,566 $ 67,136 Earnings (loss) per share: Basic $ 0.43 $ (1.41) $ 0.71 $ 0.71 Diluted 0.43 (1.41) 0.70 0.71 For the year ended December 31, 2019: Interest income $ 131,243 $ 132,414 $ 132,604 $ 129,846 Interest expense 19,837 21,773 20,269 16,927 Provision for credit losses 1,526 334 1,562 2,297 Noninterest income 7,681 6,324 11,430 9,801 Noninterest expense 63,577 63,936 65,336 66,216 Income tax provision 15,266 14,168 15,492 13,109 Net income $ 38,718 $ 38,527 $ 41,375 $ 41,098 Earnings per share: Basic $ 0.62 $ 0.62 $ 0.69 $ 0.69 Diluted 0.62 0.62 0.69 0.69

Parent Company Financial Info_2

Parent Company Financial Information (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Schedule of condensed balance sheets	Condensed financial statements of the Corporation are as follows: PACIFIC PREMIER BANCORP, INC. STATEMENTS OF FINANCIAL CONDITION (Parent company only) At December 31, 2020 2019 (Dollars in thousands) Assets Cash and cash equivalents $ 96,827 $ 13,717 Investment in subsidiaries 3,017,285 2,217,903 Other assets 1,301 1,230 Total assets $ 3,115,413 $ 2,232,850 Liabilities Subordinated debentures $ 363,140 $ 215,145 Accrued expenses and other liabilities 5,624 5,111 Total liabilities 368,764 220,256 Total stockholders’ equity 2,746,649 2,012,594 Total liabilities and stockholders’ equity $ 3,115,413 $ 2,232,850
Schedule of condensed statements of operations	PACIFIC PREMIER BANCORP, INC. STATEMENTS OF OPERATIONS (Parent company only) For the Year Ended December 31, 2020 2019 2018 (Dollars in thousands) Income Dividend income from the Bank $ 29,874 $ 54,118 $ — Interest income 22 51 57 Total income 29,896 54,169 57 Expense Interest expense on subordinated debentures 16,596 10,680 6,716 Compensation and benefits 3,205 3,106 2,757 Other noninterest expense 4,929 2,818 3,384 Total expense 24,730 16,604 12,857 Income (loss) before income tax provision 5,166 37,565 (12,800) Income tax benefit (6,734) (4,695) (3,680) Income (loss) before undistributed income of subsidiary 11,900 42,260 (9,120) Equity in undistributed earnings of subsidiary 48,451 117,458 132,460 Net income $ 60,351 $ 159,718 $ 123,340
Schedule of condensed statements of cash flows	PACIFIC PREMIER BANCORP, INC. SUMMARY STATEMENTS OF CASH FLOWS (Parent company only) For the Year Ended December 31, 2020 2019 2018 (Dollars in thousands) Cash flows from operating activities: Net income $ 60,351 $ 159,718 $ 123,340 Adjustments to reconcile net income to cash used in operating activities: Share-based compensation expense 10,859 10,528 9,033 Equity in undistributed earnings of subsidiary and dividends from the bank (48,451) (117,458) (132,460) Deferred income tax expense 188 42 65 Change in accrued expenses and other liabilities, net 1,149 3,131 (4,149) Change in accrued interest receivable and other assets, net (8,443) (4,826) 2,461 Net cash provided by (used in) operating activities 15,653 51,135 (1,710) Cash flows from investing activities: Cash acquired in acquisitions, net — — 2,985 Other, net — — (5,467) Net cash used in investing activities — — (2,482) Cash flows from financing activities: Redemption of junior subordinated debt securities — (18,558) — Proceeds from issuance of subordinated debt, net 147,359 122,453 — Cash dividends paid (79,901) (53,867) — Repurchase and retirement of common stock — (100,000) — Proceeds from exercise of options 1,652 2,679 1,924 Restricted stock surrendered and canceled (1,653) (3,285) (1,669) Net cash provided by (used in) financing activities 67,457 (50,578) 255 Net increase (decrease) in cash and cash equivalents 83,110 557 (3,937) Cash and cash equivalents, beginning of year 13,717 13,160 17,097 Cash and cash equivalents, end of year $ 96,827 13,717 $ 13,160

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Summary of total transaction consideration value	The value of the total transaction consideration paid amounted to approximately $749.6 million. The Opus warrants assumed by the Corporation expired unexercised on September 30, 2020 and no longer remain outstanding. The Opus options assumed by the Corporation have been fully exercised during the third quarter of 2020. May 29, 2020 Merger consideration (Dollars in thousands) Value of stock consideration paid to shareholders $ 747,458 Cash paid in lieu of fractional shares 2 Value of restricted stock awards 328 Value of options and warrants (1) 1,817 Total merger consideration $ 749,605 ______________________________ (1) The Opus warrants assumed by the Corporation expired unexercised on September 30, 2020 and no longer remain outstanding. The Opus options assumed by the Corporation have been fully exercised during the third quarter of 2020.
Schedule of assets acquired and liabilities assumed and the provisional fair value adjustments and amounts recorded	The following table summarizes the estimated fair value of assets acquired and liabilities assumed of Opus as of June 1, 2020 under the acquisition method of accounting, net of purchase accounting adjustments: Identifiable net assets acquired, at fair value June 1, 2020 (Dollars in thousands) Assets acquired Cash and cash equivalents $ 937,102 Interest bearing time deposits with financial institutions 137 Investment securities 829,891 Loans 5,809,451 Allowance for credit losses (21,242) Premises and equipment 22,121 Intangible assets 19,267 Deferred tax assets 45,003 Other assets 370,304 Total assets acquired $ 8,012,034 Liabilities assumed Deposits $ 6,915,990 FHLB advances and other borrowings 213,491 Subordinated debt 138,653 Other liabilities 84,542 Total liabilities assumed 7,352,676 Total fair value of identifiable net assets 659,358 Total merger consideration 749,605 Goodwill recognized $ 90,247 The following table summarizes the estimated fair value of assets acquired and liabilities assumed of Grandpoint as of July 1, 2018 under the acquisition method of accounting: Identifiable net assets acquired, at fair value July 1, 2018 (Dollars in thousands) Assets acquired Cash and cash equivalents $ 147,551 Investment securities 392,858 Loans 2,352,717 Fixed assets 9,122 Core deposit intangible 71,943 Deferred tax assets 5,028 Other assets 97,005 Total assets acquired $ 3,076,224 Liabilities assumed Deposits $ 2,506,929 Borrowings 254,923 Other Liabilities 24,859 Total liabilities assumed 2,786,711 Total fair value of identifiable net assets 289,513 Total merger consideration paid 602,152 Goodwill recognized $ 312,639
Summary of pro forma net interest and other income, net income and earnings per share	The following table presents certain unaudited pro forma financial information for illustrative purposes only, for the years ended December 31, 2020 and 2019 as if Opus had been acquired on January 1, 2019. This unaudited pro forma information combines the historical results of Opus with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition occurred as of the beginning of the year prior to the acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value, cost savings, or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented and the differences could be significant. Year Ended December 31, 2020 2019 (Dollar in thousands, except per share data) Net interest and other income $ 777,663 $ 778,924 Net (loss) income 67,579 251,640 Basic (loss) earnings per share 0.74 2.75 Diluted (loss) earnings per share 0.74 2.72 There were no material, nonrecurring adjustments to the unaudited pro forma net interest and other income, net income, and earnings per share presented below: 2018 (Dollars in thousands, except per share data) Net interest and other income $ 473,748 Net income 133,565 Basic earnings per share 2.16 Diluted earnings per share 2.14

Description of Business and S_4

Description of Business and Summary of Significant Accounting Policies - Narrative (Details)	Jun. 01, 2020USD ($)	Jul. 31, 2020USD ($)	Dec. 31, 2020USD ($)branch	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2020USD ($)	Jan. 01, 2020USD ($)	Dec. 31, 2017USD ($)
Property, Plant and Equipment [Line Items]
Percentage of capital stock of the Bank held			100.00%
Number of depository branches | branch			65
Cash reserves required by the Federal Reserve			$ 0
Aggregate amortized cost of SBA PPP loan portfolio sold			1,338,325,000	$ 86,313,000	$ 125,485,000
SBA PPP loans			13,236,433,000	8,722,311,000
ACL recorded related to PCD loans			21,242,000
Valuation allowance			0	0
Retained earnings			330,555,000	396,051,000			$ 396,051,000
Allowance for credit losses on loans			268,018,000	35,698,000	$ 36,072,000			$ 28,936,000
Deferred tax (liabilities) assets							(1,371,000)
Allowance for credit losses on off-balance sheet credit exposures			$ 31,100,000	3,300,000			3,279,000
Impact of CECL Adoption
Property, Plant and Equipment [Line Items]
SBA PPP loans							55,700,000
Retained earnings							(45,625,000)
Allowance for credit losses on loans				55,686,000			64,000,000
Deferred tax (liabilities) assets							18,346,000
Allowance for credit losses on off-balance sheet credit exposures							8,285,000
Core Deposits | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life (in years)			6 years
Core Deposits | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life (in years)			11 years
Premises
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)			30 years
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)			7 years
Computer and telecommunication
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)			3 years
Opus
Property, Plant and Equipment [Line Items]
Aggregate fair value of PCD loans acquired	$ 841,234,000
ACL recorded related to PCD loans	21,200,000
Commercial loans
Property, Plant and Equipment [Line Items]
SBA PPP loans			$ 2,229,588,000	$ 1,975,053,000
Allowance for credit losses on loans							20,118,000
Commercial loans | Impact of CECL Adoption
Property, Plant and Equipment [Line Items]
Allowance for credit losses on loans							9,519,000
Commercial loans | Opus
Property, Plant and Equipment [Line Items]
Aggregate fair value of PCD loans acquired	$ 54,687,000
Commercial loans | SBA PPP
Property, Plant and Equipment [Line Items]
Aggregate amortized cost of SBA PPP loan portfolio sold		$ 1,130,000,000
Gain (loss) on sale of SBA PPP loan portfolio		$ 18,900,000
SBA PPP loans			$ 0			$ 1,130,000,000
Commercial loans | Investor loans secured by real estate | Impact of CECL Adoption
Property, Plant and Equipment [Line Items]
Allowance for credit losses on loans							16,100,000
Commercial loans | Business loans secured by real estate | Impact of CECL Adoption
Property, Plant and Equipment [Line Items]
Allowance for credit losses on loans							27,600,000
Consumer loans | Retail loans | Impact of CECL Adoption
Property, Plant and Equipment [Line Items]
Allowance for credit losses on loans							$ 2,500,000

Description of Business and S_5

Description of Business and Summary of Significant Accounting Policies - Impact of adoption of the CECL model Under ASC 326 (Details) - USD ($)	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on debt securities, held-to-maturity	$ 0	$ 0
Allowance for credit losses on debt securities, available-for-sale	0	0
Allowance for credit losses on loans	268,018,000		$ 35,698,000	$ 36,072,000	$ 28,936,000
Deferred tax (liabilities) assets		(1,371,000)
Allowance for credit losses on off-balance sheet credit exposures	31,100,000	3,279,000	3,300,000
Retained earnings	$ 330,555,000	396,051,000	396,051,000
Investor loans secured by real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		9,027,000
Business loans secured by real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		5,492,000
Commercial loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		20,118,000
Retail loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		1,061,000
Impact of CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on debt securities, held-to-maturity		0
Allowance for credit losses on debt securities, available-for-sale		0
Allowance for credit losses on loans		64,000,000	$ 55,686,000
Deferred tax (liabilities) assets		18,346,000
Allowance for credit losses on off-balance sheet credit exposures		8,285,000
Retained earnings		(45,625,000)
Impact of CECL Adoption | Investor loans secured by real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		16,072,000
Impact of CECL Adoption | Business loans secured by real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		27,572,000
Impact of CECL Adoption | Commercial loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		9,519,000
Impact of CECL Adoption | Retail loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		2,523,000
As Reported Under CECL
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on debt securities, held-to-maturity		0
Allowance for credit losses on debt securities, available-for-sale		0
Deferred tax (liabilities) assets		16,975,000
Allowance for credit losses on off-balance sheet credit exposures		11,564,000
Retained earnings		350,426,000
As Reported Under CECL | Investor loans secured by real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		25,099,000
As Reported Under CECL | Business loans secured by real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		33,064,000
As Reported Under CECL | Commercial loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		29,637,000
As Reported Under CECL | Retail loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		$ 3,584,000

Regulatory Capital Requiremen_3

Regulatory Capital Requirements and Other Regulatory Matters (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Tier 1 Leverage Ratio
Actual, Amount (in dollars)	$ 1,811,280	$ 1,123,740
Actual, Ratio (as a percent)	0.0947	0.1054
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 764,968	$ 426,597
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.0400	0.0400
Common Equity Tier 1 Capital Ratio
Actual, Amount (in dollars)	$ 1,811,280	$ 1,116,185
Actual, Ratio (as a percent)	12.04%	11.35%
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 1,053,063	$ 688,508
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.0700	0.0700
Tier 1 Capital Ratio
Actual, Amount (in dollars)	$ 1,811,280	$ 1,123,740
Actual, Ratio (as a percent)	0.1204	0.1142
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 1,278,719	$ 836,045
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.0850	0.0850
Total Capital Ratio
Actual, Amount (in dollars)	$ 2,454,055	$ 1,357,904
Actual, Ratio (as a percent)	0.1631	0.1381
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 1,579,594	$ 1,032,762
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.1050	0.1050
Pacific Premier Bank
Tier 1 Leverage Ratio
Actual, Amount (in dollars)	$ 2,081,916	$ 1,321,494
Actual, Ratio (as a percent)	0.1089	0.1239
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 764,863	$ 426,592
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.0400	0.0400
Minimum Required For Well Capitalized Requirement, Amount (in dollars)	$ 956,079	$ 533,240
Minimum Required For Well Capitalized Requirement, Ratio (as a percent)	0.0500	0.0500
Common Equity Tier 1 Capital Ratio
Actual, Amount (in dollars)	$ 2,081,916	$ 1,321,494
Actual, Ratio (as a percent)	13.84%	13.43%
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 1,053,177	$ 688,650
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.0700	0.0700
Minimum Required For Well Capitalized Requirement, Amount (in dollars)	$ 977,950	$ 639,461
Minimum Required For Well Capitalized Requirement, Ratio (as a percent)	6.50%	6.50%
Tier 1 Capital Ratio
Actual, Amount (in dollars)	$ 2,081,916	$ 1,321,494
Actual, Ratio (as a percent)	0.1384	0.1343
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 1,278,858	$ 836,218
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.0850	0.0850
Minimum Required For Well Capitalized Requirement, Amount (in dollars)	$ 1,203,631	$ 787,029
Minimum Required For Well Capitalized Requirement, Ratio (as a percent)	0.0800	0.0800
Total Capital Ratio
Actual, Amount (in dollars)	$ 2,390,954	$ 1,360,471
Actual, Ratio (as a percent)	0.1589	0.1383
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Amount (in dollars)	$ 1,579,766	$ 1,032,975
Minimum Required for Capital Adequacy Purposes Inclusive of Capital Conservation Buffer, Ratio (as a percent)	0.1050	0.1050
Minimum Required For Well Capitalized Requirement, Amount (in dollars)	$ 1,504,539	$ 983,786
Minimum Required For Well Capitalized Requirement, Ratio (as a percent)	0.1000	0.1000

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment securities available-for-sale:
Amortized Cost	$ 3,846,733	$ 1,338,260
Gross Unrealized Gain	90,004	34,216
Gross Unrealized Gain	(5,622)	(4,092)
Estimated Fair Value	3,931,115	1,368,384
Investment securities held-to-maturity:
Amortized Cost	23,732	37,838
Gross Unrealized Gain	1,281	922
Gross Unrealized Loss	0	0
Estimated Fair Value	25,013	38,760
Total investment securities
Amortized Cost	3,870,465	1,376,098
Gross Unrealized Gain	91,285	35,138
Gross Unrealized Loss	(5,622)	(4,092)
Estimated Fair Value	3,956,128	1,407,144
U.S. Treasury
Investment securities available-for-sale:
Amortized Cost	30,153	60,457
Gross Unrealized Gain	2,380	3,137
Gross Unrealized Gain	0	(39)
Estimated Fair Value	32,533	63,555
Agency
Investment securities available-for-sale:
Amortized Cost	666,702	240,348
Gross Unrealized Gain	24,292	7,686
Gross Unrealized Gain	(608)	(1,676)
Estimated Fair Value	690,386	246,358
Corporate
Investment securities available-for-sale:
Amortized Cost	412,223	149,150
Gross Unrealized Gain	3,591	2,217
Gross Unrealized Gain	(506)	(14)
Estimated Fair Value	415,308	151,353
Municipal bonds
Investment securities available-for-sale:
Amortized Cost	1,412,012	384,032
Gross Unrealized Gain	37,260	13,450
Gross Unrealized Gain	(3,253)	(184)
Estimated Fair Value	1,446,019	397,298
Collateralized mortgage obligation
Investment securities available-for-sale:
Amortized Cost	513,259	9,869
Gross Unrealized Gain	819	123
Gross Unrealized Gain	(712)	(8)
Estimated Fair Value	513,366	9,984
Mortgage-backed securities
Investment securities available-for-sale:
Amortized Cost	812,384	494,404
Gross Unrealized Gain	21,662	7,603
Gross Unrealized Gain	(543)	(2,171)
Estimated Fair Value	833,503	499,836
Investment securities held-to-maturity:
Amortized Cost	22,124	36,114
Gross Unrealized Gain	1,281	922
Gross Unrealized Loss	0	0
Estimated Fair Value	23,405	37,036
Other
Investment securities held-to-maturity:
Amortized Cost	1,608	1,724
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Estimated Fair Value	$ 1,608	$ 1,724

Investment Securities - Narrati

Investment Securities - Narrative (Details)	3 Months Ended	12 Months Ended
	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)investmentSecurity	Dec. 31, 2019USD ($)investmentSecurity	Dec. 31, 2018USD ($)	Jan. 01, 2020USD ($)
Investment Holdings [Line Items]
Accumulated other comprehensive income (loss)		$ 84,400,000	$ 30,100,000
Accumulated other comprehensive income (loss), net of tax		60,292,000	21,523,000
Available-for-sale securities acquired		2,715,499,000	889,516,000	$ 462,534,000
Available-for-sale securities, provision for credit losses		$ 0
OTTI on investment securities			$ 0	0
Available-for-sale and held-to-maturity securities in nonaccrual status | investmentSecurity		0
Available-for-sale and held-to-maturity securities purchased with deterioration in credit quality | investmentSecurity		0	0
Available-for-sale and held-to-maturity collateral dependant | investmentSecurity			0
Gross gains		$ 15,700,000	$ 10,300,000	1,600,000
Gross losses		1,800,000	1,800,000	208,000
Proceeds from sale of securities available-for-sale		766,500,000	551,800,000	407,000,000
Investment securities pledged		147,300,000	125,700,000
FHLB stock		17,300,000
FRB stock		74,400,000
Other stock		25,400,000
FHLB repurchases		17,300,000	$ 18,300,000	$ 24,900,000
Impairment loss on investments in FHLB, FRB and other stock		0
Allowance for credit losses on debt securities, available-for-sale		0			$ 0
Allowance for credit losses on debt securities, held-to-maturity		$ 0			$ 0
Opus
Investment Holdings [Line Items]
Available-for-sale securities acquired	$ 829,900,000
Allowance for credit losses of available-for-sale securities classified as purchase credit deteriorated	0
Opus | Financial Asset Acquired with Credit Deterioration
Investment Holdings [Line Items]
Available-for-sale securities acquired	$ 0

Investment Securities - Number,

Investment Securities - Number, Fair Value and Gross Unrealized Losses (Details) $ in Thousands	Dec. 31, 2020USD ($)investmentSecurity	Dec. 31, 2019USD ($)investmentSecurity
Number
Less than 12 months | investmentSecurity	106	45
12 months or Longer | investmentSecurity	10	21
Total | investmentSecurity	116	66
Fair Value
Less than 12 months	$ 812,988	$ 274,640
12 months or Longer	10,865	41,003
Total	823,853	315,643
Gross Unrealized Losses
Less than 12 months	(5,319)	(3,258)
12 months or Longer	(303)	(834)
Total	$ (5,622)	$ (4,092)
U.S. Treasury
Number
Less than 12 months | investmentSecurity		1
12 months or Longer | investmentSecurity		0
Total | investmentSecurity		1
Fair Value
Less than 12 months		$ 10,194
12 months or Longer		0
Total		10,194
Gross Unrealized Losses
Less than 12 months		(39)
12 months or Longer		0
Total		$ (39)
Agency
Number
Less than 12 months | investmentSecurity	4	13
12 months or Longer | investmentSecurity	9	9
Total | investmentSecurity	13	22
Fair Value
Less than 12 months	$ 74,194	$ 102,874
12 months or Longer	10,434	13,514
Total	84,628	116,388
Gross Unrealized Losses
Less than 12 months	(307)	(1,340)
12 months or Longer	(301)	(336)
Total	$ (608)	$ (1,676)
Corporate
Number
Less than 12 months | investmentSecurity	9	1
12 months or Longer | investmentSecurity	0	0
Total | investmentSecurity	9	1
Fair Value
Less than 12 months	$ 71,226	$ 1,017
12 months or Longer	0	0
Total	71,226	1,017
Gross Unrealized Losses
Less than 12 months	(506)	(14)
12 months or Longer	0	0
Total	$ (506)	$ (14)
Municipal bonds
Number
Less than 12 months | investmentSecurity	56	12
12 months or Longer | investmentSecurity	0	0
Total | investmentSecurity	56	12
Fair Value
Less than 12 months	$ 312,894	$ 30,541
12 months or Longer	0	0
Total	312,894	30,541
Gross Unrealized Losses
Less than 12 months	(3,253)	(184)
12 months or Longer	0	0
Total	$ (3,253)	$ (184)
Collateralized mortgage obligations
Number
Less than 12 months | investmentSecurity	21	0
12 months or Longer | investmentSecurity	1	1
Total | investmentSecurity	22	1
Fair Value
Less than 12 months	$ 215,603	$ 0
12 months or Longer	431	603
Total	216,034	603
Gross Unrealized Losses
Less than 12 months	(710)	0
12 months or Longer	(2)	(8)
Total	$ (712)	$ (8)
Mortgage-backed securities
Number
Less than 12 months | investmentSecurity	16	18
12 months or Longer | investmentSecurity	0	11
Total | investmentSecurity	16	29
Fair Value
Less than 12 months	$ 139,071	$ 130,014
12 months or Longer	0	26,886
Total	139,071	156,900
Gross Unrealized Losses
Less than 12 months	(543)	(1,681)
12 months or Longer	0	(490)
Total	$ (543)	$ (2,171)

Investment Securities - Amort_2

Investment Securities - Amortized Cost and Fair Value by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized Cost
Due in One Year or Less	$ 156,044
Due after One Year through Five Years	417,881
Due after Five Years through Ten Years	894,968
Due after Ten Years	2,377,840
Amortized Cost	3,846,733	$ 1,338,260
Fair Value
Due in One Year or Less	156,996
Due after One Year through Five Years	428,702
Due after Five Years through Ten Years	923,253
Due after Ten Years	2,422,164
Total	3,931,115	1,368,384
Amortized Cost
Due in One Year or Less	0
Due after One Year through Five Years	0
Due after Five Years through Ten Years	0
Due after Ten Years	23,732
Amortized Cost	23,732	37,838
Fair Value
Due in One Year or Less	0
Due after One Year through Five Years	0
Due after Five Years through Ten Years	0
Due after Ten Years	25,013
Total	25,013	38,760
Amortized Cost
Due in One Year or Less	156,044
Due after One Year through Five Years	417,881
Due after Five Years through Ten Years	894,968
Due after Ten Years	2,401,572
Total	3,870,465
Fair Value
Due in One Year or Less	156,996
Due after One Year through Five Years	428,702
Due after Five Years through Ten Years	923,253
Due after Ten Years	2,447,177
Estimated Fair Value	3,956,128	1,407,144
Treasury
Amortized Cost
Due in One Year or Less	0
Due after One Year through Five Years	30,153
Due after Five Years through Ten Years	0
Due after Ten Years	0
Amortized Cost	30,153	60,457
Fair Value
Due in One Year or Less	0
Due after One Year through Five Years	32,533
Due after Five Years through Ten Years	0
Due after Ten Years	0
Total	32,533	63,555
Agency
Amortized Cost
Due in One Year or Less	0
Due after One Year through Five Years	357,471
Due after Five Years through Ten Years	216,904
Due after Ten Years	92,327
Amortized Cost	666,702	240,348
Fair Value
Due in One Year or Less	0
Due after One Year through Five Years	365,530
Due after Five Years through Ten Years	227,338
Due after Ten Years	97,518
Total	690,386	246,358
Corporate
Amortized Cost
Due in One Year or Less	146,122
Due after One Year through Five Years	9,696
Due after Five Years through Ten Years	218,964
Due after Ten Years	37,441
Amortized Cost	412,223	149,150
Fair Value
Due in One Year or Less	146,471
Due after One Year through Five Years	9,714
Due after Five Years through Ten Years	221,753
Due after Ten Years	37,370
Total	415,308	151,353
Municipal bonds
Amortized Cost
Due in One Year or Less	9,922
Due after One Year through Five Years	3,456
Due after Five Years through Ten Years	34,623
Due after Ten Years	1,364,011
Amortized Cost	1,412,012	384,032
Fair Value
Due in One Year or Less	10,525
Due after One Year through Five Years	3,743
Due after Five Years through Ten Years	37,721
Due after Ten Years	1,394,030
Total	1,446,019	397,298
Collateralized mortgage obligations
Amortized Cost
Due in One Year or Less	0
Due after One Year through Five Years	14,938
Due after Five Years through Ten Years	219,553
Due after Ten Years	278,768
Amortized Cost	513,259	9,869
Fair Value
Due in One Year or Less	0
Due after One Year through Five Years	14,869
Due after Five Years through Ten Years	219,509
Due after Ten Years	278,988
Total	513,366	9,984
Mortgage-backed securities
Amortized Cost
Due in One Year or Less	0
Due after One Year through Five Years	2,167
Due after Five Years through Ten Years	204,924
Due after Ten Years	605,293
Amortized Cost	812,384	494,404
Fair Value
Due in One Year or Less	0
Due after One Year through Five Years	2,313
Due after Five Years through Ten Years	216,932
Due after Ten Years	614,258
Total	833,503	499,836
Amortized Cost
Due in One Year or Less	0
Due after One Year through Five Years	0
Due after Five Years through Ten Years	0
Due after Ten Years	22,124
Amortized Cost	22,124	36,114
Fair Value
Due in One Year or Less	0
Due after One Year through Five Years	0
Due after Five Years through Ten Years	0
Due after Ten Years	23,405
Total	23,405	$ 37,036
Other
Amortized Cost
Due in One Year or Less	0
Due after One Year through Five Years	0
Due after Five Years through Ten Years	0
Due after Ten Years	1,608
Amortized Cost	1,608
Fair Value
Due in One Year or Less	0
Due after One Year through Five Years	0
Due after Five Years through Ten Years	0
Due after Ten Years	1,608
Total	$ 1,608

Investment Securities - Investm

Investment Securities - Investment Securities by External Credit Rating (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
2020	$ 2,209,625
2019	640,139
2018	280,417
2017	258,763
2016	305,701
Prior	236,470
Total	3,931,115	$ 1,368,384
2020	0
2019	0
2018	7,185
2017	5,372
2016	4,209
Prior	6,966
Amortized Cost	23,732	37,838
2020	2,209,625
2019	640,139
2018	287,602
2017	264,135
2016	309,910
Prior	243,436
Total	3,954,847
U.S. Treasury
Debt Securities, Available-for-sale [Line Items]
Total	32,533	63,555
U.S. Treasury | Aaa - Aa3
Debt Securities, Available-for-sale [Line Items]
2020	0
2019	0
2018	21,852
2017	10,681
2016	0
Prior	0
Total	32,533
Agency
Debt Securities, Available-for-sale [Line Items]
Total	690,386	246,358
Agency | Aaa - Aa3
Debt Securities, Available-for-sale [Line Items]
2020	359,428
2019	60,943
2018	157,942
2017	9,733
2016	20,711
Prior	81,629
Total	690,386
Corporate debt
Debt Securities, Available-for-sale [Line Items]
Total	415,308	151,353
Corporate debt | A1 - A3
Debt Securities, Available-for-sale [Line Items]
2020	60,858
2019	0
2018	0
2017	0
2016	118,631
Prior	9,145
Total	188,634
Corporate debt | Baa1 - Baa3
Debt Securities, Available-for-sale [Line Items]
2020	99,999
2019	69,638
2018	5,034
2017	17,936
2016	5,449
Prior	28,618
Total	226,674
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total	1,446,019	397,298
Municipal bonds | Aaa - Aa3
Debt Securities, Available-for-sale [Line Items]
2020	1,022,544
2019	290,007
2018	32,798
2017	60,595
2016	15,294
Prior	23,919
Total	1,445,157
Municipal bonds | A1 - A3
Debt Securities, Available-for-sale [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	862
Total	862
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Total	513,366	9,984
Collateralized mortgage obligations | Aaa - Aa3
Debt Securities, Available-for-sale [Line Items]
2020	241,971
2019	107,104
2018	29,890
2017	15,305
2016	105,641
Prior	13,455
Total	513,366
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Total	833,503	499,836
Amortized Cost	22,124	36,114
Mortgage-backed securities | Aaa - Aa3
Debt Securities, Available-for-sale [Line Items]
2020	424,825
2019	112,447
2018	32,901
2017	144,513
2016	39,975
Prior	78,842
Total	833,503
2020	0
2019	0
2018	6,552
2017	5,372
2016	4,209
Prior	5,991
Amortized Cost	22,124
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,608	$ 1,724
Other | Baa1 - Baa3
Debt Securities, Available-for-sale [Line Items]
2020	0
2019	0
2018	633
2017	0
2016	0
Prior	975
Amortized Cost	$ 1,608

Loans - Composition of Loan Por

Loans - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans Held for Investment
Gross loans held for investment	$ 13,236,433		$ 8,722,311
Allowance for credit losses for loans held for investment	(268,018)		(35,698)	$ (36,072)	$ (28,936)
Loans held for investment, net	12,968,415		8,686,613
Loans held for sale, at lower of cost or fair value	601		1,672
Unaccreted mark-to-market discount	113,800		40,700
Investor loans secured by real estate
Loans Held for Investment
Gross loans held for investment	8,225,765		4,153,084
Allowance for credit losses for loans held for investment		$ (9,027)
Investor loans secured by real estate | CRE non-owner-occupied
Loans Held for Investment
Gross loans held for investment	2,675,085		2,070,141
Allowance for credit losses for loans held for investment	(49,176)		(1,899)	(1,624)	(1,273)
Investor loans secured by real estate | Multifamily
Loans Held for Investment
Gross loans held for investment	5,171,356		1,575,726
Allowance for credit losses for loans held for investment	(62,534)		(729)	(740)	(614)
Investor loans secured by real estate | Construction and land
Loans Held for Investment
Gross loans held for investment	321,993		438,786
Allowance for credit losses for loans held for investment	(12,435)		(4,484)	(5,964)	(5,565)
Investor loans secured by real estate | SBA secured by real estate
Loans Held for Investment
Gross loans held for investment	57,331		68,431
Allowance for credit losses for loans held for investment	(5,159)		(1,915)	(1,827)	(1,396)
Business loans secured by real estate
Loans Held for Investment
Gross loans held for investment	2,541,577		2,288,175
Allowance for credit losses for loans held for investment		(5,492)
Business loans secured by real estate | SBA secured by real estate
Loans Held for Investment
Gross loans held for investment	79,595		88,381
Allowance for credit losses for loans held for investment	(6,567)		(2,119)	(1,824)	(901)
Business loans secured by real estate | CRE owner-occupied
Loans Held for Investment
Gross loans held for investment	2,114,050		1,846,554
Allowance for credit losses for loans held for investment	(50,517)		(2,781)	(1,908)	(923)
Business loans secured by real estate | Franchise real estate secured
Loans Held for Investment
Gross loans held for investment	347,932		353,240
Allowance for credit losses for loans held for investment	(11,451)		(592)	(743)	(602)
Commercial loans
Loans Held for Investment
Gross loans held for investment	2,229,588		1,975,053
Allowance for credit losses for loans held for investment		(20,118)
Commercial loans | Commercial and industrial
Loans Held for Investment
Gross loans held for investment	1,768,834		1,393,270
Allowance for credit losses for loans held for investment	(46,964)		(13,857)	(13,695)	(11,018)
Commercial loans | Franchise non-real estate secured
Loans Held for Investment
Gross loans held for investment	444,797		564,357
Allowance for credit losses for loans held for investment	(20,525)		(5,816)	(6,066)	(5,191)
Commercial loans | SBA non-real estate secured
Loans Held for Investment
Gross loans held for investment	15,957		17,426
Allowance for credit losses for loans held for investment	(995)		(445)	(654)	(594)
Retail loans
Loans Held for Investment
Gross loans held for investment	239,503		305,999
Allowance for credit losses for loans held for investment		$ (1,061)
Retail loans | Single family residential
Loans Held for Investment
Gross loans held for investment	232,574		255,024
Allowance for credit losses for loans held for investment	(1,204)		(655)	(808)	(804)
Retail loans | Consumer
Loans Held for Investment
Gross loans held for investment	6,929		50,975
Allowance for credit losses for loans held for investment	$ (491)		$ (406)	$ (219)	$ (55)

Loans - Narrative (Details)

Loans - Narrative (Details)	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan	Dec. 23, 2016USD ($)	Jul. 31, 2020USD ($)	Dec. 31, 2020USD ($)loanareagrade	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)	Jun. 30, 2020USD ($)	Jun. 01, 2020USD ($)	Jan. 01, 2020USD ($)
Loans Held for Investment
Loans held for investment	$ 13,236,433,000	$ 8,722,311,000			$ 13,236,433,000	$ 8,722,311,000
Aggregate amortized cost of SBA PPP loan portfolio sold					1,338,325,000	86,313,000	$ 125,485,000
Servicing rights retained from guaranteed portion of SBA loans sold	5,300,000	7,700,000			5,300,000	7,700,000
Valuation allowance for servicing assets	0	0			0	0
Accrued expenses and other liabilities	243,207,000	131,367,000			243,207,000	131,367,000
Unpaid principal balance for loans and participations serviced for others	686,000,000	633,800,000			686,000,000	633,800,000
Secured loans limit to one borrower	821,300,000				821,300,000
Unsecured loans limit to one borrower	492,800,000				492,800,000
Aggregate outstanding balance of loans to one borrower of secured credit	165,400,000				$ 165,400,000
Number of areas where the entity's credit quality is maintained and credit risk managed | area					2
Number of pass scale grades | grade					6
Individually evaluated loans	29,200,000	22,842,000			$ 29,200,000	22,842,000
ACL attributable to individually evaluated loans	126,000	0			126,000	0
Loans on nonaccrual status	29,200,000				29,200,000
Loans 90 days or more past due and still accruing	$ 0	0			$ 0	$ 0
Premodification TDR		$ 3,000,000
Number of TDR loans modified | loan					0
Number of TDR loans | loan	0	2			0	2
Number of TDR loans with payment defaults after modification | loan					0	0
Nonaccrual loans	$ 29,209,000	$ 8,500,000			$ 29,209,000	$ 8,500,000
Consumer mortgage loans collateralized by residential real estate, foreclosure proceedings in process	$ 0	0			$ 0	0
Impact of CECL Adoption
Loans Held for Investment
Loans held for investment										$ 55,700,000
Impact of CECL Adoption | Financial Asset Acquired with Credit Deterioration
Loans Held for Investment
Loans held for investment										$ 0
COVID-19 Related Loan Modifications
Loans Held for Investment
Number of TDR loans modified | loan	52
Number of TDR loans | loan	0				0
Total balance of loans modified	$ 79,500,000				$ 79,500,000
Percentage of total loans held for investment	0.60%				0.60%
Opus | COVID-19 Related Loan Modifications
Loans Held for Investment
Number of TDR loans modified | loan	5
Total balance of loans modified	$ 3,100,000				$ 3,100,000
Valuation Technique, Discounted Cash Flow [Member]
Loans Held for Investment
Individually evaluated loans	15,200,000				15,200,000
Underlying value of the collateral
Loans Held for Investment
Individually evaluated loans	$ 14,000,000				$ 14,000,000
Opus | Opus
Loans Held for Investment
Loans held for investment									$ 5,940,000,000
Multifamily Loan Securitization, Liability | Variable Interest Entity, Not Primary Beneficiary
Loans Held for Investment
Maximum loss, percentage of loans	10.00%				10.00%
Multifamily Loan Securitization
Loans Held for Investment
Unpaid principal balance for loans and participations serviced for others	$ 99,400,000				$ 99,400,000
Multifamily Loan Securitization | Variable Interest Entity, Not Primary Beneficiary
Loans Held for Investment
Accrued expenses and other liabilities	448,000	0			448,000	0
Multifamily Loan Securitization | Opus
Loans Held for Investment
Proceeds from sale of loans receivable			$ 509,000,000
SBA
Loans Held for Investment
Unpaid principal balance for loans and participations serviced for others	421,700,000	475,300,000			421,700,000	475,300,000
Commercial loans
Loans Held for Investment
Loans held for investment	2,229,588,000	1,975,053,000			2,229,588,000	1,975,053,000
Nonaccrual loans	17,919,000				17,919,000
Commercial loans | SBA PPP
Loans Held for Investment
Loans held for investment	0				0			$ 1,130,000,000
Aggregate amortized cost of SBA PPP loan portfolio sold				$ 1,130,000,000
Gain (loss) on sale of SBA PPP loan portfolio				$ 18,900,000
Commercial loans | Commercial and industrial
Loans Held for Investment
Loans held for investment	1,768,834,000	1,393,270,000			1,768,834,000	1,393,270,000
Individually evaluated loans		7,529,000				7,529,000
ACL attributable to individually evaluated loans		0				0
Premodification TDR		1,300,000
TDR charged off					1,300,000
Nonaccrual loans	3,974,000				3,974,000
Commercial loans | Franchise non-real estate secured
Loans Held for Investment
Loans held for investment	444,797,000	564,357,000			444,797,000	564,357,000
Individually evaluated loans		10,834,000				10,834,000
ACL attributable to individually evaluated loans		0				$ 0
Premodification TDR		$ 1,700,000
TDR charged off					344,000
Nonaccrual loans	$ 13,238,000				$ 13,238,000

Loans - Loan Portfolio by Inter

Loans - Loan Portfolio by Internal Risk Grading by Year of Origination (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 1,862,085
2019	3,354,750
2018	2,140,513
2017	1,729,763
2016	1,072,603
Prior	2,152,690
Revolving	912,643
Revolving Converted to Term During the Period	11,386
Total	13,236,433	$ 8,722,311
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total		8,640,840
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		36,722
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total		44,749
Investor loans secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,351,350
2019	2,386,517
2018	1,437,278
2017	988,649
2016	674,159
Prior	1,374,935
Revolving	12,877
Revolving Converted to Term During the Period	0
Total	8,225,765	4,153,084
Investor loans secured by real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total		4,147,989
Investor loans secured by real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		2,151
Investor loans secured by real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total		2,944
Investor loans secured by real estate | CRE non-owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,675,085	2,070,141
Investor loans secured by real estate | CRE non-owner-occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	265,901
2019	541,994
2018	440,351
2017	287,580
2016	279,238
Prior	791,477
Revolving	11,114
Revolving Converted to Term During the Period	0
Total	2,617,655	2,067,875
Investor loans secured by real estate | CRE non-owner-occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	6,669
2017	437
2016	2,516
Prior	29,738
Revolving	0
Revolving Converted to Term During the Period	0
Total	39,360	1,178
Investor loans secured by real estate | CRE non-owner-occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	9,732
2018	2,045
2017	0
2016	516
Prior	5,218
Revolving	559
Revolving Converted to Term During the Period	0
Total	18,070	1,088
Investor loans secured by real estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Total	5,171,356	1,575,726
Investor loans secured by real estate | Multifamily | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,027,644
2019	1,677,716
2018	899,123
2017	665,939
2016	354,859
Prior	531,287
Revolving	420
Revolving Converted to Term During the Period	0
Total	5,156,988	1,575,510
Investor loans secured by real estate | Multifamily | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	1,758
2018	2,630
2017	0
2016	8,649
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	13,037	0
Investor loans secured by real estate | Multifamily | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	559
2016	772
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,331	216
Investor loans secured by real estate | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Total	321,993	438,786
Investor loans secured by real estate | Construction and land | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	57,309
2019	144,759
2018	73,313
2017	18,625
2016	20,531
Prior	6,672
Revolving	784
Revolving Converted to Term During the Period	0
Total	321,993	438,769
Investor loans secured by real estate | Construction and land | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		0
Investor loans secured by real estate | Construction and land | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total		17
Investor loans secured by real estate | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total	57,331	68,431
Investor loans secured by real estate | SBA secured by real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	8,306
2018	9,029
2017	13,418
2016	6,305
Prior	7,696
Revolving	0
Revolving Converted to Term During the Period	0
Total	44,754	65,835
Investor loans secured by real estate | SBA secured by real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	496
2019	1,032
2018	1,159
2017	1,000
2016	373
Prior	306
Revolving	0
Revolving Converted to Term During the Period	0
Total	4,366	973
Investor loans secured by real estate | SBA secured by real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	1,220
2018	2,959
2017	1,091
2016	400
Prior	2,541
Revolving	0
Revolving Converted to Term During the Period	0
Total	8,211	1,623
Business loans secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	344,058
2019	516,400
2018	422,995
2017	446,733
2016	267,062
Prior	529,565
Revolving	14,518
Revolving Converted to Term During the Period	246
Total	2,541,577	2,288,175
Business loans secured by real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total		2,267,278
Business loans secured by real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		13,930
Business loans secured by real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total		6,967
Business loans secured by real estate | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total	79,595	88,381
Business loans secured by real estate | SBA secured by real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,253
2019	7,637
2018	12,608
2017	16,058
2016	8,488
Prior	23,624
Revolving	0
Revolving Converted to Term During the Period	0
Total	71,668	83,106
Business loans secured by real estate | SBA secured by real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	1,200
2017	0
2016	137
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,337	1,842
Business loans secured by real estate | SBA secured by real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	184
2017	1,987
2016	1,376
Prior	3,043
Revolving	0
Revolving Converted to Term During the Period	0
Total	6,590	3,433
Business loans secured by real estate | CRE owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,114,050	1,846,554
Business loans secured by real estate | CRE owner-occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	293,324
2019	409,758
2018	332,672
2017	327,475
2016	225,098
Prior	469,704
Revolving	14,268
Revolving Converted to Term During the Period	246
Total	2,072,545	1,831,853
Business loans secured by real estate | CRE owner-occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,190
2019	15,917
2018	3,802
2017	0
2016	4,153
Prior	201
Revolving	0
Revolving Converted to Term During the Period	0
Total	26,263	11,167
Business loans secured by real estate | CRE owner-occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	3,636
2017	4,214
2016	1,169
Prior	5,973
Revolving	250
Revolving Converted to Term During the Period	0
Total	15,242	3,534
Business loans secured by real estate | Franchise real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Total	347,932	353,240
Business loans secured by real estate | Franchise real estate secured | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	44,413
2019	81,438
2018	66,241
2017	96,999
2016	24,673
Prior	27,020
Revolving	0
Revolving Converted to Term During the Period	0
Total	340,784	352,319
Business loans secured by real estate | Franchise real estate secured | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	878
2019	1,650
2018	2,652
2017	0
2016	0
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	5,180	921
Business loans secured by real estate | Franchise real estate secured | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	1,968
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,968	0
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	155,831
2019	444,000
2018	266,221
2017	280,317
2016	97,412
Prior	120,099
Revolving	854,568
Revolving Converted to Term During the Period	11,140
Total	2,229,588	1,975,053
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total		1,920,189
Commercial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		20,641
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total		34,223
Commercial loans | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,768,834	1,393,270
Commercial loans | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	127,082
2019	260,368
2018	159,001
2017	210,163
2016	51,800
Prior	82,291
Revolving	801,752
Revolving Converted to Term During the Period	9,315
Total	1,701,772	1,359,662
Commercial loans | Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	735
2019	0
2018	2,331
2017	185
2016	1,320
Prior	243
Revolving	17,890
Revolving Converted to Term During the Period	37
Total	22,741	13,226
Commercial loans | Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	3,310
2018	2,737
2017	610
2016	1,333
Prior	2,446
Revolving	32,858
Revolving Converted to Term During the Period	1,027
Total	44,321	20,382
Commercial loans | Franchise non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Total	444,797	564,357
Commercial loans | Franchise non-real estate secured | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	27,607
2019	164,025
2018	94,494
2017	46,174
2016	40,829
Prior	27,745
Revolving	1,361
Revolving Converted to Term During the Period	502
Total	402,737	546,594
Commercial loans | Franchise non-real estate secured | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	7,267
2018	2,037
2017	230
2016	480
Prior	2,321
Revolving	0
Revolving Converted to Term During the Period	0
Total	12,335	6,930
Commercial loans | Franchise non-real estate secured | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	6,690
2018	3,706
2017	18,425
2016	700
Prior	204
Revolving	0
Revolving Converted to Term During the Period	0
Total	29,725	10,833
Commercial loans | SBA non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Total	15,957	17,426
Commercial loans | SBA non-real estate secured | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	407
2019	2,257
2018	1,558
2017	2,674
2016	610
Prior	4,449
Revolving	0
Revolving Converted to Term During the Period	259
Total	12,214	13,933
Commercial loans | SBA non-real estate secured | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	1,574
2016	0
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,574	485
Commercial loans | SBA non-real estate secured | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	83
2018	357
2017	282
2016	340
Prior	400
Revolving	707
Revolving Converted to Term During the Period	0
Total	2,169	3,008
Retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	10,846
2019	7,833
2018	14,019
2017	14,064
2016	33,970
Prior	128,091
Revolving	30,680
Revolving Converted to Term During the Period	0
Total	239,503	305,999
Retail loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total		305,384
Retail loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		0
Retail loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total		615
Retail loans | Single family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Total	232,574	255,024
Retail loans | Single family residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	10,794
2019	7,714
2018	13,982
2017	14,039
2016	33,968
Prior	124,248
Revolving	27,172
Revolving Converted to Term During the Period	0
Total	231,917	254,463
Retail loans | Single family residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		0
Retail loans | Single family residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	657
Revolving	0
Revolving Converted to Term During the Period	0
Total	657	561
Retail loans | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total	6,929	50,975
Retail loans | Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	52
2019	112
2018	37
2017	25
2016	2
Prior	3,145
Revolving	3,508
Revolving Converted to Term During the Period	0
Total	6,881	50,921
Retail loans | Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total		0
Retail loans | Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	7
2018	0
2017	0
2016	0
Prior	41
Revolving	0
Revolving Converted to Term During the Period	0
Total	$ 48	$ 54

Loans - Loan Portfolio by Int_2

Loans - Loan Portfolio by Internal Risk Rating (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	$ 13,236,433	$ 8,722,311
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		8,640,840
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		36,722
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		44,749
Investor loans secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	8,225,765	4,153,084
Investor loans secured by real estate | CRE non-owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	2,675,085	2,070,141
Investor loans secured by real estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	5,171,356	1,575,726
Investor loans secured by real estate | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	321,993	438,786
Investor loans secured by real estate | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	57,331	68,431
Investor loans secured by real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		4,147,989
Investor loans secured by real estate | Pass | CRE non-owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	2,617,655	2,067,875
Investor loans secured by real estate | Pass | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	5,156,988	1,575,510
Investor loans secured by real estate | Pass | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	321,993	438,769
Investor loans secured by real estate | Pass | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	44,754	65,835
Investor loans secured by real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		2,151
Investor loans secured by real estate | Special Mention | CRE non-owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	39,360	1,178
Investor loans secured by real estate | Special Mention | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	13,037	0
Investor loans secured by real estate | Special Mention | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		0
Investor loans secured by real estate | Special Mention | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	4,366	973
Investor loans secured by real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		2,944
Investor loans secured by real estate | Substandard | CRE non-owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	18,070	1,088
Investor loans secured by real estate | Substandard | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	1,331	216
Investor loans secured by real estate | Substandard | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		17
Investor loans secured by real estate | Substandard | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	8,211	1,623
Business loans secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	2,541,577	2,288,175
Business loans secured by real estate | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	79,595	88,381
Business loans secured by real estate | CRE owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	2,114,050	1,846,554
Business loans secured by real estate | Franchise real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	347,932	353,240
Business loans secured by real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		2,267,278
Business loans secured by real estate | Pass | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	71,668	83,106
Business loans secured by real estate | Pass | CRE owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	2,072,545	1,831,853
Business loans secured by real estate | Pass | Franchise real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	340,784	352,319
Business loans secured by real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		13,930
Business loans secured by real estate | Special Mention | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	1,337	1,842
Business loans secured by real estate | Special Mention | CRE owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	26,263	11,167
Business loans secured by real estate | Special Mention | Franchise real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	5,180	921
Business loans secured by real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		6,967
Business loans secured by real estate | Substandard | SBA secured by real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	6,590	3,433
Business loans secured by real estate | Substandard | CRE owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	15,242	3,534
Business loans secured by real estate | Substandard | Franchise real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	1,968	0
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	2,229,588	1,975,053
Commercial loans | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	1,768,834	1,393,270
Commercial loans | Franchise non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	444,797	564,357
Commercial loans | SBA non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	15,957	17,426
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		1,920,189
Commercial loans | Pass | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	1,701,772	1,359,662
Commercial loans | Pass | Franchise non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	402,737	546,594
Commercial loans | Pass | SBA non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	12,214	13,933
Commercial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		20,641
Commercial loans | Special Mention | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	22,741	13,226
Commercial loans | Special Mention | Franchise non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	12,335	6,930
Commercial loans | Special Mention | SBA non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	1,574	485
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		34,223
Commercial loans | Substandard | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	44,321	20,382
Commercial loans | Substandard | Franchise non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	29,725	10,833
Commercial loans | Substandard | SBA non-real estate secured
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	2,169	3,008
Retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	239,503	305,999
Retail loans | Single family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	232,574	255,024
Retail loans | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	6,929	50,975
Retail loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		305,384
Retail loans | Pass | Single family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	231,917	254,463
Retail loans | Pass | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	6,881	50,921
Retail loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		0
Retail loans | Special Mention | Single family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		0
Retail loans | Special Mention | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		0
Retail loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment		615
Retail loans | Substandard | Single family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	657	561
Retail loans | Substandard | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans held for investment	$ 48	$ 54

Loans - Aging of Loan Portfolio

Loans - Aging of Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other information concerning the credit quality
Total	$ 13,236,433	$ 8,722,311
Investor loans secured by real estate
Other information concerning the credit quality
Total	8,225,765	4,153,084
Investor loans secured by real estate | CRE non-owner-occupied
Other information concerning the credit quality
Total	2,675,085	2,070,141
Investor loans secured by real estate | Multifamily
Other information concerning the credit quality
Total	5,171,356	1,575,726
Investor loans secured by real estate | Construction and land
Other information concerning the credit quality
Total	321,993	438,786
Investor loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Total	57,331	68,431
Business loans secured by real estate
Other information concerning the credit quality
Total	2,541,577	2,288,175
Business loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Total	79,595	88,381
Business loans secured by real estate | CRE owner-occupied
Other information concerning the credit quality
Total	2,114,050	1,846,554
Business loans secured by real estate | Franchise real estate secured
Other information concerning the credit quality
Total	347,932	353,240
Commercial loans
Other information concerning the credit quality
Total	2,229,588	1,975,053
Commercial loans | Commercial and industrial
Other information concerning the credit quality
Total	1,768,834	1,393,270
Commercial loans | Franchise non-real estate secured
Other information concerning the credit quality
Total	444,797	564,357
Commercial loans | SBA non-real estate secured
Other information concerning the credit quality
Total	15,957	17,426
Retail loans
Other information concerning the credit quality
Total	239,503	305,999
Retail loans | Single family residential
Other information concerning the credit quality
Total	232,574	255,024
Retail loans | Consumer
Other information concerning the credit quality
Total	6,929	50,975
Current
Other information concerning the credit quality
Current	13,223,111	8,703,209
Current | Investor loans secured by real estate
Other information concerning the credit quality
Current	8,223,750	4,150,427
Current | Investor loans secured by real estate | CRE non-owner-occupied
Other information concerning the credit quality
Current	2,674,328	2,067,874
Current | Investor loans secured by real estate | Multifamily
Other information concerning the credit quality
Current	5,171,355	1,575,726
Current | Investor loans secured by real estate | Construction and land
Other information concerning the credit quality
Current	321,993	438,786
Current | Investor loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Current	56,074	68,041
Current | Business loans secured by real estate
Other information concerning the credit quality
Current	2,534,714	2,286,409
Current | Business loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Current	78,036	86,946
Current | Business loans secured by real estate | CRE owner-occupied
Other information concerning the credit quality
Current	2,108,746	1,846,223
Current | Business loans secured by real estate | Franchise real estate secured
Other information concerning the credit quality
Current	347,932	353,240
Current | Commercial loans
Other information concerning the credit quality
Current	2,225,160	1,960,382
Current | Commercial loans | Commercial and industrial
Other information concerning the credit quality
Current	1,765,451	1,389,026
Current | Commercial loans | Franchise non-real estate secured
Other information concerning the credit quality
Current	444,797	555,215
Current | Commercial loans | SBA non-real estate secured
Other information concerning the credit quality
Current	14,912	16,141
Current | Retail loans
Other information concerning the credit quality
Current	239,487	305,991
Current | Retail loans | Single family residential
Other information concerning the credit quality
Current	232,559	255,024
Current | Retail loans | Consumer
Other information concerning the credit quality
Current	6,928	50,967
30-59
Other information concerning the credit quality
Days Past Due	1,269	2,104
30-59 | Investor loans secured by real estate
Other information concerning the credit quality
Days Past Due	1	1,179
30-59 | Investor loans secured by real estate | CRE non-owner-occupied
Other information concerning the credit quality
Days Past Due	0	1,179
30-59 | Investor loans secured by real estate | Multifamily
Other information concerning the credit quality
Days Past Due	1	0
30-59 | Investor loans secured by real estate | Construction and land
Other information concerning the credit quality
Days Past Due	0	0
30-59 | Investor loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Days Past Due	0	0
30-59 | Business loans secured by real estate
Other information concerning the credit quality
Days Past Due	486	331
30-59 | Business loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Days Past Due	486	0
30-59 | Business loans secured by real estate | CRE owner-occupied
Other information concerning the credit quality
Days Past Due	0	331
30-59 | Business loans secured by real estate | Franchise real estate secured
Other information concerning the credit quality
Days Past Due	0	0
30-59 | Commercial loans
Other information concerning the credit quality
Days Past Due	766	589
30-59 | Commercial loans | Commercial and industrial
Other information concerning the credit quality
Days Past Due	428	422
30-59 | Commercial loans | Franchise non-real estate secured
Other information concerning the credit quality
Days Past Due	0	0
30-59 | Commercial loans | SBA non-real estate secured
Other information concerning the credit quality
Days Past Due	338	167
30-59 | Retail loans
Other information concerning the credit quality
Days Past Due	16	5
30-59 | Retail loans | Single family residential
Other information concerning the credit quality
Days Past Due	15	0
30-59 | Retail loans | Consumer
Other information concerning the credit quality
Days Past Due	1	5
60-89
Other information concerning the credit quality
Days Past Due	57	10,559
60-89 | Investor loans secured by real estate
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Investor loans secured by real estate | CRE non-owner-occupied
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Investor loans secured by real estate | Multifamily
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Investor loans secured by real estate | Construction and land
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Investor loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Business loans secured by real estate
Other information concerning the credit quality
Days Past Due	0	589
60-89 | Business loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Days Past Due	0	589
60-89 | Business loans secured by real estate | CRE owner-occupied
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Business loans secured by real estate | Franchise real estate secured
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Commercial loans
Other information concerning the credit quality
Days Past Due	57	9,968
60-89 | Commercial loans | Commercial and industrial
Other information concerning the credit quality
Days Past Due	57	826
60-89 | Commercial loans | Franchise non-real estate secured
Other information concerning the credit quality
Days Past Due	0	9,142
60-89 | Commercial loans | SBA non-real estate secured
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Retail loans
Other information concerning the credit quality
Days Past Due	0	2
60-89 | Retail loans | Single family residential
Other information concerning the credit quality
Days Past Due	0	0
60-89 | Retail loans | Consumer
Other information concerning the credit quality
Days Past Due	0	2
90+
Other information concerning the credit quality
Days Past Due	11,996	6,439
90+ | Investor loans secured by real estate
Other information concerning the credit quality
Days Past Due	2,014	1,478
90+ | Investor loans secured by real estate | CRE non-owner-occupied
Other information concerning the credit quality
Days Past Due	757	1,088
90+ | Investor loans secured by real estate | Multifamily
Other information concerning the credit quality
Days Past Due	0	0
90+ | Investor loans secured by real estate | Construction and land
Other information concerning the credit quality
Days Past Due	0	0
90+ | Investor loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Days Past Due	1,257	390
90+ | Business loans secured by real estate
Other information concerning the credit quality
Days Past Due	6,377	846
90+ | Business loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Days Past Due	1,073	846
90+ | Business loans secured by real estate | CRE owner-occupied
Other information concerning the credit quality
Days Past Due	5,304	0
90+ | Business loans secured by real estate | Franchise real estate secured
Other information concerning the credit quality
Days Past Due	0	0
90+ | Commercial loans
Other information concerning the credit quality
Days Past Due	3,605	4,114
90+ | Commercial loans | Commercial and industrial
Other information concerning the credit quality
Days Past Due	2,898	2,996
90+ | Commercial loans | Franchise non-real estate secured
Other information concerning the credit quality
Days Past Due	0	0
90+ | Commercial loans | SBA non-real estate secured
Other information concerning the credit quality
Days Past Due	707	1,118
90+ | Retail loans
Other information concerning the credit quality
Days Past Due	0	1
90+ | Retail loans | Single family residential
Other information concerning the credit quality
Days Past Due	0	0
90+ | Retail loans | Consumer
Other information concerning the credit quality
Days Past Due	$ 0	$ 1

Loans - Investment in Impaired

Loans - Investment in Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Impaired Loans
Recorded Investment	$ 22,842	$ 12,430
Unpaid Principal Balance	24,256	17,440
With Specific Allowance	0	1,038
Without Specific Allowance	22,842	11,420
Specific Allowance for Impaired Loans	0	584
Average Recorded Investment	17,938	7,562
Interest Income Recognized	552	36
Investor loans secured by real estate | CRE non-owner-occupied
Impaired Loans
Recorded Investment	1,088	0
Unpaid Principal Balance	1,184	0
With Specific Allowance	0	0
Without Specific Allowance	1,088	0
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	317	538
Interest Income Recognized	0	0
Investor loans secured by real estate | Multifamily
Impaired Loans
Recorded Investment		0
Unpaid Principal Balance		0
With Specific Allowance		0
Without Specific Allowance		0
Specific Allowance for Impaired Loans		0
Average Recorded Investment		500
Interest Income Recognized		0
Investor loans secured by real estate | Construction and land
Impaired Loans
Recorded Investment	0	0
Unpaid Principal Balance	0	0
With Specific Allowance	0	0
Without Specific Allowance	0	0
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	120	5
Interest Income Recognized	0	0
Investor loans secured by real estate | SBA secured by real estate
Impaired Loans
Recorded Investment	390	1,600
Unpaid Principal Balance	772	6,077
With Specific Allowance	0	488
Without Specific Allowance	390	1,140
Specific Allowance for Impaired Loans	0	466
Average Recorded Investment	1,002	1,280
Interest Income Recognized	0	0
Business loans secured by real estate | SBA secured by real estate
Impaired Loans
Recorded Investment	1,517
Unpaid Principal Balance	1,743
With Specific Allowance	0
Without Specific Allowance	1,517
Specific Allowance for Impaired Loans	0
Average Recorded Investment	872
Interest Income Recognized	16
Business loans secured by real estate | CRE owner-occupied
Impaired Loans
Recorded Investment	0	599
Unpaid Principal Balance	0	628
With Specific Allowance	0	0
Without Specific Allowance	0	599
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	777	1,565
Interest Income Recognized	0	0
Business loans secured by real estate | Franchise real estate secured
Impaired Loans
Recorded Investment	0
Unpaid Principal Balance	0
With Specific Allowance	0
Without Specific Allowance	0
Specific Allowance for Impaired Loans	0
Average Recorded Investment	1,887
Interest Income Recognized	0
Commercial loans | Commercial and industrial
Impaired Loans
Recorded Investment	7,529	8,523
Unpaid Principal Balance	7,755	8,571
With Specific Allowance	0	550
Without Specific Allowance	7,529	7,973
Specific Allowance for Impaired Loans	0	118
Average Recorded Investment	10,251	1,782
Interest Income Recognized	385	36
Commercial loans | Franchise non-real estate secured
Impaired Loans
Recorded Investment	10,834	190
Unpaid Principal Balance	10,835	190
With Specific Allowance	0	0
Without Specific Allowance	10,834	190
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	1,192	119
Interest Income Recognized	151	0
Commercial loans | SBA non-real estate secured
Impaired Loans
Recorded Investment	1,118	1,110
Unpaid Principal Balance	1,555	1,521
With Specific Allowance	0	0
Without Specific Allowance	1,118	1,110
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	1,122	534
Interest Income Recognized	0	0
Retail loans | Single family residential
Impaired Loans
Recorded Investment	366	408
Unpaid Principal Balance	412	453
With Specific Allowance	0	0
Without Specific Allowance	366	408
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	379	1,206
Interest Income Recognized	0	0
Retail loans | Consumer
Impaired Loans
Recorded Investment	0	0
Unpaid Principal Balance	0	0
With Specific Allowance	0	0
Without Specific Allowance	0	0
Specific Allowance for Impaired Loans	0	0
Average Recorded Investment	19	33
Interest Income Recognized	$ 0	$ 0

Loans - Acquired Loans Classifi

Loans - Acquired Loans Classified as PCD (Details) - USD ($) $ in Thousands	Jun. 01, 2020	Dec. 31, 2020
Loans Held for Investment
ACL recorded related to PCD loans		$ 21,242
Opus
Loans Held for Investment
Par value (unpaid principal balance)	$ 896,483
Allowance for credit losses	(43,885)
(Discount) premium related to factors other than credit	(11,364)
Purchase price (initial fair value)	841,234
Uncollectable allowance for credit losses	22,700
ACL recorded related to PCD loans	21,200
Opus | Investor loans secured by real estate
Loans Held for Investment
Par value (unpaid principal balance)	704,441
Allowance for credit losses	(13,786)
(Discount) premium related to factors other than credit	(8,696)
Purchase price (initial fair value)	681,959
Opus | Business loans secured by real estate
Loans Held for Investment
Par value (unpaid principal balance)	105,578
Allowance for credit losses	(4,083)
(Discount) premium related to factors other than credit	(2,512)
Purchase price (initial fair value)	98,983
Opus | Commercial loans
Loans Held for Investment
Par value (unpaid principal balance)	80,184
Allowance for credit losses	(25,635)
(Discount) premium related to factors other than credit	138
Purchase price (initial fair value)	54,687
Opus | Retail loans
Loans Held for Investment
Par value (unpaid principal balance)	6,280
Allowance for credit losses	(381)
(Discount) premium related to factors other than credit	(294)
Purchase price (initial fair value)	$ 5,605

Loans - Summary of Nonaccrual L

Loans - Summary of Nonaccrual Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Nonaccrual [Line Items]
ACL	$ 268,018,000		$ 35,698,000	$ 36,072,000	$ 28,936,000
Nonaccrual loans	29,209,000		8,500,000
Nonaccrual Loans with No ACL	27,968,000
Interest income on nonaccrual loans	0
Investor loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL		$ 9,027,000
Nonaccrual loans	4,049,000
Nonaccrual Loans with No ACL	4,049,000
Investor loans secured by real estate | CRE non-owner-occupied
Financing Receivable, Nonaccrual [Line Items]
ACL	49,176,000		1,899,000	1,624,000	1,273,000
Nonaccrual loans	2,792,000
Nonaccrual Loans with No ACL	2,792,000
Investor loans secured by real estate | SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	5,159,000		1,915,000	1,827,000	1,396,000
Nonaccrual loans	1,257,000
Nonaccrual Loans with No ACL	1,257,000
Business loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL		5,492,000
Nonaccrual loans	7,226,000
Nonaccrual Loans with No ACL	7,226,000
Business loans secured by real estate | SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	6,567,000		2,119,000	1,824,000	901,000
Nonaccrual loans	1,143,000
Nonaccrual Loans with No ACL	1,143,000
Business loans secured by real estate | CRE owner-occupied
Financing Receivable, Nonaccrual [Line Items]
ACL	50,517,000		2,781,000	1,908,000	923,000
Nonaccrual loans	6,083,000
Nonaccrual Loans with No ACL	6,083,000
Commercial loans
Financing Receivable, Nonaccrual [Line Items]
ACL		20,118,000
Nonaccrual loans	17,919,000
Nonaccrual Loans with No ACL	16,678,000
Commercial loans | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
ACL	46,964,000		13,857,000	13,695,000	11,018,000
Nonaccrual loans	3,974,000
Nonaccrual Loans with No ACL	2,733,000
Commercial loans | Franchise non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
ACL	20,525,000		5,816,000	6,066,000	5,191,000
Nonaccrual loans	13,238,000
Nonaccrual Loans with No ACL	13,238,000
Commercial loans | SBA non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
ACL	995,000		445,000	654,000	594,000
Nonaccrual loans	707,000
Nonaccrual Loans with No ACL	707,000
Retail loans
Financing Receivable, Nonaccrual [Line Items]
ACL		$ 1,061,000
Nonaccrual loans	15,000
Nonaccrual Loans with No ACL	15,000
Retail loans | Single family residential
Financing Receivable, Nonaccrual [Line Items]
ACL	1,204,000		$ 655,000	$ 808,000	$ 804,000
Nonaccrual loans	15,000
Nonaccrual Loans with No ACL	15,000
Collateral Dependent Loans
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	14,037,000
Collateral Dependent Loans | Investor loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	4,049,000
Collateral Dependent Loans | Investor loans secured by real estate | CRE non-owner-occupied
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	2,792,000
Collateral Dependent Loans | Investor loans secured by real estate | SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	1,257,000
Collateral Dependent Loans | Business loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	7,226,000
Collateral Dependent Loans | Business loans secured by real estate | SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	1,143,000
Collateral Dependent Loans | Business loans secured by real estate | CRE owner-occupied
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	6,083,000
Collateral Dependent Loans | Commercial loans
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	2,747,000
Collateral Dependent Loans | Commercial loans | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	2,040,000
Collateral Dependent Loans | Commercial loans | Franchise non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Collateral Dependent Loans | Commercial loans | SBA non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	707,000
Collateral Dependent Loans | Retail loans
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	15,000
Collateral Dependent Loans | Retail loans | Single family residential
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	15,000
Non-Collateral Dependent Loans
Financing Receivable, Nonaccrual [Line Items]
ACL	126,000
Nonaccrual loans	15,172,000
Non-Collateral Dependent Loans | Investor loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Investor loans secured by real estate | CRE non-owner-occupied
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Investor loans secured by real estate | SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Business loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Business loans secured by real estate | SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Business loans secured by real estate | CRE owner-occupied
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Commercial loans
Financing Receivable, Nonaccrual [Line Items]
ACL	126,000
Nonaccrual loans	15,172,000
Non-Collateral Dependent Loans | Commercial loans | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
ACL	126,000
Nonaccrual loans	1,934,000
Non-Collateral Dependent Loans | Commercial loans | Franchise non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	13,238,000
Non-Collateral Dependent Loans | Commercial loans | SBA non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Retail loans
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	0
Non-Collateral Dependent Loans | Retail loans | Single family residential
Financing Receivable, Nonaccrual [Line Items]
ACL	0
Nonaccrual loans	$ 0

Loans - Collateral Dependent Lo

Loans - Collateral Dependent Loans by Collateral Type (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other information concerning the credit quality
Nonaccrual loans	$ 29,209	$ 8,500
Office Properties
Other information concerning the credit quality
Nonaccrual loans	288
Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	1,536
Retail Properties
Other information concerning the credit quality
Nonaccrual loans	2,594
Land Properties
Other information concerning the credit quality
Nonaccrual loans	5,304
Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	1,455
Residential Properties
Other information concerning the credit quality
Nonaccrual loans	113
Business Assets
Other information concerning the credit quality
Nonaccrual loans	2,747
Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	14,037
Investor loans secured by real estate
Other information concerning the credit quality
Nonaccrual loans	4,049
Investor loans secured by real estate | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	2,594
Investor loans secured by real estate | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	1,455
Investor loans secured by real estate | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	4,049
Investor loans secured by real estate | CRE non-owner-occupied
Other information concerning the credit quality
Nonaccrual loans	2,792
Investor loans secured by real estate | CRE non-owner-occupied | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | CRE non-owner-occupied | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | CRE non-owner-occupied | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	2,594
Investor loans secured by real estate | CRE non-owner-occupied | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | CRE non-owner-occupied | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	198
Investor loans secured by real estate | CRE non-owner-occupied | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | CRE non-owner-occupied | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | CRE non-owner-occupied | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	2,792
Investor loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Nonaccrual loans	1,257
Investor loans secured by real estate | SBA secured by real estate | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | SBA secured by real estate | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | SBA secured by real estate | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | SBA secured by real estate | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | SBA secured by real estate | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	1,257
Investor loans secured by real estate | SBA secured by real estate | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | SBA secured by real estate | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Investor loans secured by real estate | SBA secured by real estate | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	1,257
Business loans secured by real estate
Other information concerning the credit quality
Nonaccrual loans	7,226
Business loans secured by real estate | Office Properties
Other information concerning the credit quality
Nonaccrual loans	288
Business loans secured by real estate | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	1,536
Business loans secured by real estate | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | Land Properties
Other information concerning the credit quality
Nonaccrual loans	5,304
Business loans secured by real estate | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	98
Business loans secured by real estate | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	7,226
Business loans secured by real estate | SBA secured by real estate
Other information concerning the credit quality
Nonaccrual loans	1,143
Business loans secured by real estate | SBA secured by real estate | Office Properties
Other information concerning the credit quality
Nonaccrual loans	288
Business loans secured by real estate | SBA secured by real estate | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	757
Business loans secured by real estate | SBA secured by real estate | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | SBA secured by real estate | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | SBA secured by real estate | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | SBA secured by real estate | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	98
Business loans secured by real estate | SBA secured by real estate | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | SBA secured by real estate | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	1,143
Business loans secured by real estate | CRE owner-occupied
Other information concerning the credit quality
Nonaccrual loans	6,083
Business loans secured by real estate | CRE owner-occupied | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | CRE owner-occupied | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	779
Business loans secured by real estate | CRE owner-occupied | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | CRE owner-occupied | Land Properties
Other information concerning the credit quality
Nonaccrual loans	5,304
Business loans secured by real estate | CRE owner-occupied | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | CRE owner-occupied | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | CRE owner-occupied | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Business loans secured by real estate | CRE owner-occupied | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	6,083
Commercial loans
Other information concerning the credit quality
Nonaccrual loans	17,919
Commercial loans | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Business Assets
Other information concerning the credit quality
Nonaccrual loans	2,747
Commercial loans | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	2,747
Commercial loans | Commercial and industrial
Other information concerning the credit quality
Nonaccrual loans	3,974
Commercial loans | Commercial and industrial | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Commercial and industrial | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Commercial and industrial | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Commercial and industrial | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Commercial and industrial | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Commercial and industrial | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | Commercial and industrial | Business Assets
Other information concerning the credit quality
Nonaccrual loans	2,040
Commercial loans | Commercial and industrial | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	2,040
Commercial loans | SBA non-real estate secured
Other information concerning the credit quality
Nonaccrual loans	707
Commercial loans | SBA non-real estate secured | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | SBA non-real estate secured | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | SBA non-real estate secured | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | SBA non-real estate secured | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | SBA non-real estate secured | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | SBA non-real estate secured | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	0
Commercial loans | SBA non-real estate secured | Business Assets
Other information concerning the credit quality
Nonaccrual loans	707
Commercial loans | SBA non-real estate secured | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	707
Retail loans
Other information concerning the credit quality
Nonaccrual loans	15
Retail loans | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	15
Retail loans | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	15
Retail loans | Single family residential
Other information concerning the credit quality
Nonaccrual loans	15
Retail loans | Single family residential | Office Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Single family residential | Industrial Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Single family residential | Retail Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Single family residential | Land Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Single family residential | Hotel Properties
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Single family residential | Residential Properties
Other information concerning the credit quality
Nonaccrual loans	15
Retail loans | Single family residential | Business Assets
Other information concerning the credit quality
Nonaccrual loans	0
Retail loans | Single family residential | Collateral Dependent Loans
Other information concerning the credit quality
Nonaccrual loans	$ 15

Allowance for Credit Losses - N

Allowance for Credit Losses - Narrative (Details) - USD ($)	Jun. 01, 2020	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2020
Allowance for Loan Losses
Qualitative adjustments included in the ACL			$ 10,000,000
Increase (decrease) in ACL during period			232,300,000
Provision for credit losses			172,262,000	$ 7,135,000	$ 8,156,000
Net charge-offs			16,900,000
Loans held for investment			13,236,433,000	8,722,311,000
Initial ACL Recorded for PCD Loans			21,242,000
Allowance for credit losses on off-balance sheet credit exposures			31,100,000	3,300,000		$ 3,279,000
Provision for credit losses for off-balance sheet commitments				$ (1,400,000)	$ 97,000
COVID-19
Allowance for Loan Losses
Provision for credit losses			96,400,000
Financial Asset Acquired with Credit Deterioration
Allowance for Loan Losses
Provision for credit losses for off-balance sheet commitments			11,000,000
Opus
Allowance for Loan Losses
Provision for credit losses	$ 75,900,000		$ 75,900,000
Initial ACL Recorded for PCD Loans	$ 21,200,000
Provision for credit losses for off-balance sheet commitments		$ 8,600,000
Impact of CECL Adoption
Allowance for Loan Losses
Loans held for investment						55,700,000
Allowance for credit losses on off-balance sheet credit exposures						8,285,000
Impact of CECL Adoption | Financial Asset Acquired with Credit Deterioration
Allowance for Loan Losses
Loans held for investment						$ 0

Allowance for Credit Losses - A

Allowance for Credit Losses - Allocation of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	$ 35,698	$ 36,072	$ 28,936
Initial ACL Recorded for PCD Loans	21,242
Charge-offs	(19,858)	(7,853)	(1,955)
Recoveries	2,988	344	935
Provision for credit losses	172,262	7,135	8,156
Ending ACL Balance	268,018	35,698	36,072
Other disclosures
Loans Evaluated Individually for Impairment	29,200	22,842
ALLL Attributed to Individually Evaluated Loans	126	0
Loans Evaluated Collectively for Impairment		8,699,469
ALLL Attributed to Collectively Evaluated Loans		35,698
Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	55,686
Ending ACL Balance		55,686
Investor loans secured by real estate | CRE non-owner-occupied
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	1,899	1,624	1,273
Initial ACL Recorded for PCD Loans	3,025
Charge-offs	(839)	(625)	0
Recoveries	44	0	0
Provision for credit losses	36,624	900	351
Ending ACL Balance	49,176	1,899	1,624
Other disclosures
Loans Evaluated Individually for Impairment		1,088
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		2,069,053
ALLL Attributed to Collectively Evaluated Loans		1,899
Investor loans secured by real estate | CRE non-owner-occupied | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	8,423
Ending ACL Balance		8,423
Investor loans secured by real estate | Multifamily
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	729	740	614
Initial ACL Recorded for PCD Loans	8,710
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for credit losses	43,921	(11)	126
Ending ACL Balance	62,534	729	740
Other disclosures
Loans Evaluated Individually for Impairment		0
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		1,575,726
ALLL Attributed to Collectively Evaluated Loans		729
Investor loans secured by real estate | Multifamily | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	9,174
Ending ACL Balance		9,174
Investor loans secured by real estate | Construction and land
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	4,484	5,964	5,565
Initial ACL Recorded for PCD Loans	2,051
Charge-offs	(539)	0	0
Recoveries	0	0	0
Provision for credit losses	6,563	(1,480)	399
Ending ACL Balance	12,435	4,484	5,964
Other disclosures
Loans Evaluated Individually for Impairment		0
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		438,786
ALLL Attributed to Collectively Evaluated Loans		4,484
Investor loans secured by real estate | Construction and land | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	(124)
Ending ACL Balance		(124)
Investor loans secured by real estate | SBA secured by real estate
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	1,915	1,827	1,396
Initial ACL Recorded for PCD Loans	0
Charge-offs	(705)	(742)	0
Recoveries	34	0	0
Provision for credit losses	5,316	830	431
Ending ACL Balance	5,159	1,915	1,827
Other disclosures
Loans Evaluated Individually for Impairment		390
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		68,041
ALLL Attributed to Collectively Evaluated Loans		1,915
Investor loans secured by real estate | SBA secured by real estate | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	(1,401)
Ending ACL Balance		(1,401)
Business loans secured by real estate | SBA secured by real estate
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	2,119	1,824	901
Initial ACL Recorded for PCD Loans	235
Charge-offs	(338)	(908)	0
Recoveries	147	10	0
Provision for credit losses	2,197	1,193	923
Ending ACL Balance	6,567	2,119	1,824
Other disclosures
Loans Evaluated Individually for Impairment		1,517
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		86,864
ALLL Attributed to Collectively Evaluated Loans		2,119
Business loans secured by real estate | SBA secured by real estate | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	2,207
Ending ACL Balance		2,207
Business loans secured by real estate | CRE owner-occupied
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	2,781	1,908	923
Initial ACL Recorded for PCD Loans	3,766
Charge-offs	(1,739)	(125)	(33)
Recoveries	59	46	47
Provision for credit losses	25,484	952	971
Ending ACL Balance	50,517	2,781	1,908
Other disclosures
Loans Evaluated Individually for Impairment		0
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		1,846,554
ALLL Attributed to Collectively Evaluated Loans		2,781
Business loans secured by real estate | CRE owner-occupied | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	20,166
Ending ACL Balance		20,166
Business loans secured by real estate | Franchise real estate secured
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	592	743	602
Initial ACL Recorded for PCD Loans	0
Charge-offs	(932)	(1,377)	0
Recoveries	0	0	0
Provision for credit losses	6,592	1,226	141
Ending ACL Balance	11,451	592	743
Other disclosures
Loans Evaluated Individually for Impairment		0
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		353,240
ALLL Attributed to Collectively Evaluated Loans		592
Business loans secured by real estate | Franchise real estate secured | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	5,199
Ending ACL Balance		5,199
Commercial loans | Commercial and industrial
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	13,857	13,695	11,018
Initial ACL Recorded for PCD Loans	2,325
Charge-offs	(6,891)	(2,318)	(1,411)
Recoveries	1,818	189	698
Provision for credit losses	35,768	2,291	3,390
Ending ACL Balance	46,964	13,857	13,695
Other disclosures
Loans Evaluated Individually for Impairment		7,529
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		1,385,741
ALLL Attributed to Collectively Evaluated Loans		13,857
Commercial loans | Commercial and industrial | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	87
Ending ACL Balance		87
Commercial loans | Franchise non-real estate secured
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	5,816	6,066	5,191
Initial ACL Recorded for PCD Loans	0
Charge-offs	(6,731)	(1,154)	0
Recoveries	866	18	0
Provision for credit losses	11,360	886	875
Ending ACL Balance	20,525	5,816	6,066
Other disclosures
Loans Evaluated Individually for Impairment		10,834
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		553,523
ALLL Attributed to Collectively Evaluated Loans		5,816
Commercial loans | Franchise non-real estate secured | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	9,214
Ending ACL Balance		9,214
Commercial loans | SBA non-real estate secured
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	445	654	594
Initial ACL Recorded for PCD Loans	924
Charge-offs	(899)	(588)	(102)
Recoveries	14	68	169
Provision for credit losses	293	311	(7)
Ending ACL Balance	995	445	654
Other disclosures
Loans Evaluated Individually for Impairment		1,118
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		16,308
ALLL Attributed to Collectively Evaluated Loans		445
Commercial loans | SBA non-real estate secured | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	218
Ending ACL Balance		218
Retail loans | Single family residential
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	655	808	804
Initial ACL Recorded for PCD Loans	206
Charge-offs	(106)	0	0
Recoveries	2	2	13
Provision for credit losses	(94)	(155)	(9)
Ending ACL Balance	1,204	655	808
Other disclosures
Loans Evaluated Individually for Impairment		366
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		254,658
ALLL Attributed to Collectively Evaluated Loans		655
Retail loans | Single family residential | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	541
Ending ACL Balance		541
Retail loans | Consumer
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	406	219	55
Initial ACL Recorded for PCD Loans	0
Charge-offs	(139)	(16)	(409)
Recoveries	4	11	8
Provision for credit losses	(1,762)	192	565
Ending ACL Balance	491	406	$ 219
Other disclosures
Loans Evaluated Individually for Impairment		0
ALLL Attributed to Individually Evaluated Loans		0
Loans Evaluated Collectively for Impairment		50,975
ALLL Attributed to Collectively Evaluated Loans		406
Retail loans | Consumer | Impact of CECL Adoption
Allocation of allowance as well as the activity in allowance
Beginning ALLL Balance	$ 1,982
Ending ACL Balance		$ 1,982

Allowance for Credit Losses - C

Allowance for Credit Losses - Commercial Real Estate and Commercial Loan Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Allowance for Loan Losses
2020	$ 1,862,085
2019	3,354,750
2018	2,140,513
2017	1,729,763
2016	1,072,603
Prior	2,152,690
Revolving	912,643
Revolving Converted to Term During the Period	11,386
Total	13,236,433	$ 8,722,311
Investor loans secured by real estate
Allowance for Loan Losses
2020	1,351,350
2019	2,386,517
2018	1,437,278
2017	988,649
2016	674,159
Prior	1,374,935
Revolving	12,877
Revolving Converted to Term During the Period	0
Total	8,225,765	4,153,084
Investor loans secured by real estate | CRE non-owner-occupied
Allowance for Loan Losses
Total	2,675,085	2,070,141
Investor loans secured by real estate | CRE non-owner-occupied | 0% - 5.00%
Allowance for Loan Losses
2020	261,885
2019	491,522
2018	431,791
2017	266,942
2016	254,527
Prior	763,101
Revolving	11,114
Revolving Converted to Term During the Period	0
Total	2,480,882
Investor loans secured by real estate | CRE non-owner-occupied | >5.00% - 10.00%
Allowance for Loan Losses
2020	4,016
2019	34,360
2018	5,794
2017	10,558
2016	16,961
Prior	33,734
Revolving	0
Revolving Converted to Term During the Period	0
Total	105,423
Investor loans secured by real estate | CRE non-owner-occupied | Greater than 10%
Allowance for Loan Losses
2020	0
2019	25,844
2018	11,480
2017	10,517
2016	10,782
Prior	29,598
Revolving	559
Revolving Converted to Term During the Period	0
Total	88,780
Investor loans secured by real estate | Multifamily
Allowance for Loan Losses
Total	5,171,356	1,575,726
Investor loans secured by real estate | Multifamily | 0% - 5.00%
Allowance for Loan Losses
2020	950,089
2019	1,610,011
2018	878,233
2017	634,268
2016	349,549
Prior	516,452
Revolving	0
Revolving Converted to Term During the Period	0
Total	4,938,602
Investor loans secured by real estate | Multifamily | >5.00% - 10.00%
Allowance for Loan Losses
2020	38,892
2019	59,500
2018	12,181
2017	19,751
2016	10,917
Prior	13,606
Revolving	0
Revolving Converted to Term During the Period	0
Total	154,847
Investor loans secured by real estate | Multifamily | Greater than 10%
Allowance for Loan Losses
2020	38,663
2019	9,963
2018	11,339
2017	12,479
2016	3,814
Prior	1,229
Revolving	420
Revolving Converted to Term During the Period	0
Total	77,907
Investor loans secured by real estate | Construction and land
Allowance for Loan Losses
Total	321,993	438,786
Investor loans secured by real estate | Construction and land | 0% - 5.00%
Allowance for Loan Losses
2020	55,785
2019	40,860
2018	4,604
2017	11,238
2016	0
Prior	6,412
Revolving	784
Revolving Converted to Term During the Period	0
Total	119,683
Investor loans secured by real estate | Construction and land | >5.00% - 10.00%
Allowance for Loan Losses
2020	1,123
2019	41,046
2018	9,197
2017	3,601
2016	0
Prior	260
Revolving	0
Revolving Converted to Term During the Period	0
Total	55,227
Investor loans secured by real estate | Construction and land | Greater than 10%
Allowance for Loan Losses
2020	401
2019	62,853
2018	59,512
2017	3,786
2016	20,531
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	147,083
Investor loans secured by real estate | SBA secured by real estate
Allowance for Loan Losses
Total	57,331	68,431
Investor loans secured by real estate | SBA secured by real estate | 0% - 5.00%
Allowance for Loan Losses
2020	496
2019	10,400
2018	12,558
2017	14,497
2016	7,078
Prior	10,032
Revolving	0
Revolving Converted to Term During the Period	0
Total	55,061
Investor loans secured by real estate | SBA secured by real estate | >5.00% - 10.00%
Allowance for Loan Losses
2020	0
2019	0
2018	0
2017	1,012
2016	0
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,012
Investor loans secured by real estate | SBA secured by real estate | Greater than 10%
Allowance for Loan Losses
2020	0
2019	158
2018	589
2017	0
2016	0
Prior	511
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,258
Business loans secured by real estate
Allowance for Loan Losses
2020	344,058
2019	516,400
2018	422,995
2017	446,733
2016	267,062
Prior	529,565
Revolving	14,518
Revolving Converted to Term During the Period	246
Total	2,541,577	2,288,175
Business loans secured by real estate | SBA secured by real estate
Allowance for Loan Losses
Total	79,595	88,381
Business loans secured by real estate | SBA secured by real estate | 0% - 5.00%
Allowance for Loan Losses
2020	3,253
2019	7,637
2018	11,840
2017	15,069
2016	5,707
Prior	18,742
Revolving	0
Revolving Converted to Term During the Period	0
Total	62,248
Business loans secured by real estate | SBA secured by real estate | >5.00% - 10.00%
Allowance for Loan Losses
2020	0
2019	0
2018	768
2017	989
2016	2,780
Prior	4,882
Revolving	0
Revolving Converted to Term During the Period	0
Total	9,419
Business loans secured by real estate | SBA secured by real estate | Greater than 10%
Allowance for Loan Losses
2020	0
2019	0
2018	1,384
2017	1,987
2016	1,514
Prior	3,043
Revolving	0
Revolving Converted to Term During the Period	0
Total	7,928
Business loans secured by real estate | CRE owner-occupied
Allowance for Loan Losses
Total	2,114,050	1,846,554
Business loans secured by real estate | CRE owner-occupied | 0% - 5.00%
Allowance for Loan Losses
2020	286,745
2019	367,269
2018	274,512
2017	295,809
2016	202,282
Prior	422,614
Revolving	10,393
Revolving Converted to Term During the Period	246
Total	1,859,870
Business loans secured by real estate | CRE owner-occupied | >5.00% - 10.00%
Allowance for Loan Losses
2020	8,769
2019	42,310
2018	60,222
2017	28,421
2016	23,875
Prior	44,855
Revolving	3,875
Revolving Converted to Term During the Period	0
Total	212,327
Business loans secured by real estate | CRE owner-occupied | Greater than 10%
Allowance for Loan Losses
2020	0
2019	16,096
2018	5,376
2017	7,459
2016	4,263
Prior	8,409
Revolving	250
Revolving Converted to Term During the Period	0
Total	41,853
Business loans secured by real estate | Franchise real estate secured
Allowance for Loan Losses
Total	347,932	353,240
Business loans secured by real estate | Franchise real estate secured | 0% - 5.00%
Allowance for Loan Losses
2020	37,262
2019	79,926
2018	65,619
2017	96,672
2016	19,046
Prior	22,927
Revolving	0
Revolving Converted to Term During the Period	0
Total	321,452
Business loans secured by real estate | Franchise real estate secured | >5.00% - 10.00%
Allowance for Loan Losses
2020	7,587
2019	1,650
2018	3,274
2017	327
2016	5,627
Prior	4,093
Revolving	0
Revolving Converted to Term During the Period	0
Total	22,558
Business loans secured by real estate | Franchise real estate secured | Greater than 10%
Allowance for Loan Losses
2020	442
2019	1,512
2018	0
2017	0
2016	1,968
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	3,922
Commercial loans
Allowance for Loan Losses
2020	155,831
2019	444,000
2018	266,221
2017	280,317
2016	97,412
Prior	120,099
Revolving	854,568
Revolving Converted to Term During the Period	11,140
Total	2,229,588	1,975,053
Commercial loans | Commercial and industrial
Allowance for Loan Losses
Total	1,768,834	1,393,270
Commercial loans | Commercial and industrial | 0% - 5.00%
Allowance for Loan Losses
2020	70,233
2019	205,395
2018	99,178
2017	193,046
2016	36,957
Prior	62,682
Revolving	394,124
Revolving Converted to Term During the Period	5,051
Total	1,066,666
Commercial loans | Commercial and industrial | >5.00% - 10.00%
Allowance for Loan Losses
2020	49,883
2019	50,743
2018	35,813
2017	13,427
2016	12,922
Prior	13,948
Revolving	322,123
Revolving Converted to Term During the Period	2,469
Total	501,328
Commercial loans | Commercial and industrial | Greater than 10%
Allowance for Loan Losses
2020	7,701
2019	7,540
2018	29,078
2017	4,485
2016	4,574
Prior	8,350
Revolving	136,253
Revolving Converted to Term During the Period	2,859
Total	200,840
Commercial loans | Franchise non-real estate secured
Allowance for Loan Losses
Total	444,797	564,357
Commercial loans | Franchise non-real estate secured | 0% - 5.00%
Allowance for Loan Losses
2020	21,409
2019	145,392
2018	88,171
2017	38,010
2016	21,956
Prior	23,479
Revolving	0
Revolving Converted to Term During the Period	502
Total	338,919
Commercial loans | Franchise non-real estate secured | >5.00% - 10.00%
Allowance for Loan Losses
2020	6,198
2019	15,754
2018	5,454
2017	8,164
2016	18,415
Prior	3,626
Revolving	0
Revolving Converted to Term During the Period	0
Total	57,611
Commercial loans | Franchise non-real estate secured | Greater than 10%
Allowance for Loan Losses
2020	0
2019	16,836
2018	6,612
2017	18,655
2016	1,638
Prior	3,165
Revolving	1,361
Revolving Converted to Term During the Period	0
Total	48,267
Commercial loans | SBA non-real estate secured
Allowance for Loan Losses
Total	15,957	$ 17,426
Commercial loans | SBA non-real estate secured | 0% - 5.00%
Allowance for Loan Losses
2020	407
2019	2,257
2018	910
2017	1,078
2016	441
Prior	2,782
Revolving	0
Revolving Converted to Term During the Period	0
Total	7,875
Commercial loans | SBA non-real estate secured | >5.00% - 10.00%
Allowance for Loan Losses
2020	0
2019	0
2018	648
2017	1,596
2016	169
Prior	1,652
Revolving	0
Revolving Converted to Term During the Period	259
Total	4,324
Commercial loans | SBA non-real estate secured | Greater than 10%
Allowance for Loan Losses
2020	0
2019	83
2018	357
2017	1,856
2016	340
Prior	415
Revolving	707
Revolving Converted to Term During the Period	0
Total	3,758
Commercial loans | Total commercial loans
Allowance for Loan Losses
2020	155,831
2019	444,000
2018	266,221
2017	280,317
2016	97,412
Prior	120,099
Revolving	854,568
Revolving Converted to Term During the Period	11,140
Total	$ 2,229,588

Allowance for Credit Losses -_2

Allowance for Credit Losses - Amortized Cost of Loans by Estimated LTV and FICO Bands (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Allowance for Loan Losses
2020	$ 1,862,085
2019	3,354,750
2018	2,140,513
2017	1,729,763
2016	1,072,603
Prior	2,152,690
Revolving	912,643
Revolving Converted to Term During the Period	11,386
Total	13,236,433	$ 8,722,311
Investor loans secured by real estate
Allowance for Loan Losses
2020	1,351,350
2019	2,386,517
2018	1,437,278
2017	988,649
2016	674,159
Prior	1,374,935
Revolving	12,877
Revolving Converted to Term During the Period	0
Total	8,225,765	4,153,084
Investor loans secured by real estate | CRE non-owner-occupied
Allowance for Loan Losses
Total	2,675,085	2,070,141
Investor loans secured by real estate | CRE non-owner-occupied | 55% and below
Allowance for Loan Losses
2020	138,007
2019	229,272
2018	182,385
2017	136,355
2016	189,848
Prior	588,230
Revolving	11,114
Revolving Converted to Term During the Period	0
Total	1,475,211
Investor loans secured by real estate | CRE non-owner-occupied | >55-65%
Allowance for Loan Losses
2020	101,434
2019	217,210
2018	92,015
2017	130,024
2016	78,470
Prior	204,161
Revolving	559
Revolving Converted to Term During the Period	0
Total	823,873
Investor loans secured by real estate | CRE non-owner-occupied | >65-75%
Allowance for Loan Losses
2020	26,460
2019	102,494
2018	169,878
2017	18,876
2016	13,952
Prior	29,506
Revolving	0
Revolving Converted to Term During the Period	0
Total	361,166
Investor loans secured by real estate | CRE non-owner-occupied | Greater than 75%
Allowance for Loan Losses
2020	0
2019	2,750
2018	4,787
2017	2,762
2016	0
Prior	4,536
Revolving	0
Revolving Converted to Term During the Period	0
Total	14,835
Investor loans secured by real estate | Multifamily
Allowance for Loan Losses
Total	5,171,356	1,575,726
Investor loans secured by real estate | Multifamily | 55% and below
Allowance for Loan Losses
2020	218,833
2019	345,519
2018	294,464
2017	233,997
2016	84,530
Prior	269,906
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,447,249
Investor loans secured by real estate | Multifamily | >55-65%
Allowance for Loan Losses
2020	381,737
2019	731,408
2018	381,282
2017	215,170
2016	152,066
Prior	189,151
Revolving	420
Revolving Converted to Term During the Period	0
Total	2,051,234
Investor loans secured by real estate | Multifamily | >65-75%
Allowance for Loan Losses
2020	427,074
2019	583,078
2018	215,389
2017	215,452
2016	127,684
Prior	66,457
Revolving	0
Revolving Converted to Term During the Period	0
Total	1,635,134
Investor loans secured by real estate | Multifamily | Greater than 75%
Allowance for Loan Losses
2020	0
2019	19,469
2018	10,618
2017	1,879
2016	0
Prior	5,773
Revolving	0
Revolving Converted to Term During the Period	0
Total	37,739
Investor loans secured by real estate | Construction and land
Allowance for Loan Losses
Total	321,993	438,786
Investor loans secured by real estate | Construction and land | 55% and below
Allowance for Loan Losses
2020	57,309
2019	105,308
2018	36,068
2017	18,625
2016	20,531
Prior	6,672
Revolving	784
Revolving Converted to Term During the Period	0
Total	245,297
Investor loans secured by real estate | Construction and land | >55-65%
Allowance for Loan Losses
2020	0
2019	36,113
2018	23,770
2017	0
2016	0
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	59,883
Investor loans secured by real estate | Construction and land | >65-75%
Allowance for Loan Losses
2020	0
2019	3,338
2018	13,475
2017	0
2016	0
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	16,813
Investor loans secured by real estate | Construction and land | Greater than 75%
Allowance for Loan Losses
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving	0
Revolving Converted to Term During the Period	0
Total	0
Investor loans secured by real estate | SBA secured by real estate
Allowance for Loan Losses
Total	57,331	68,431
Investor loans secured by real estate | SBA secured by real estate | 55% and below
Allowance for Loan Losses
2020	0
2019	2,066
2018	649
2017	673
2016	317
Prior	778
Revolving	0
Revolving Converted to Term During the Period	0
Total	4,483
Investor loans secured by real estate | SBA secured by real estate | >55-65%
Allowance for Loan Losses
2020	0
2019	2,427
2018	1,639
2017	4,008
2016	879
Prior	4,354
Revolving	0
Revolving Converted to Term During the Period	0
Total	13,307
Investor loans secured by real estate | SBA secured by real estate | >65-75%
Allowance for Loan Losses
2020	0
2019	3,897
2018	3,882
2017	3,482
2016	4,519
Prior	1,884
Revolving	0
Revolving Converted to Term During the Period	0
Total	17,664
Investor loans secured by real estate | SBA secured by real estate | Greater than 75%
Allowance for Loan Losses
2020	496
2019	2,168
2018	6,977
2017	7,346
2016	1,363
Prior	3,527
Revolving	0
Revolving Converted to Term During the Period	0
Total	21,877
Business loans secured by real estate
Allowance for Loan Losses
2020	344,058
2019	516,400
2018	422,995
2017	446,733
2016	267,062
Prior	529,565
Revolving	14,518
Revolving Converted to Term During the Period	246
Total	2,541,577	2,288,175
Business loans secured by real estate | SBA secured by real estate
Allowance for Loan Losses
Total	79,595	88,381
Business loans secured by real estate | SBA secured by real estate | 55% and below
Allowance for Loan Losses
2020	1,825
2019	1,626
2018	5,332
2017	5,495
2016	3,615
Prior	13,582
Revolving	0
Revolving Converted to Term During the Period	0
Total	31,475
Business loans secured by real estate | SBA secured by real estate | >55-65%
Allowance for Loan Losses
2020	246
2019	513
2018	1,795
2017	1,094
2016	3,586
Prior	5,448
Revolving	0
Revolving Converted to Term During the Period	0
Total	12,682
Business loans secured by real estate | SBA secured by real estate | >65-75%
Allowance for Loan Losses
2020	264
2019	3,142
2018	1,515
2017	3,968
2016	1,586
Prior	4,043
Revolving	0
Revolving Converted to Term During the Period	0
Total	14,518
Business loans secured by real estate | SBA secured by real estate | Greater than 75%
Allowance for Loan Losses
2020	918
2019	2,356
2018	5,350
2017	7,488
2016	1,214
Prior	3,594
Revolving	0
Revolving Converted to Term During the Period	0
Total	20,920
Business loans secured by real estate | CRE owner-occupied
Allowance for Loan Losses
Total	2,114,050	1,846,554
Business loans secured by real estate | CRE owner-occupied | 55% and below
Allowance for Loan Losses
2020	96,803
2019	160,605
2018	157,868
2017	179,791
2016	131,795
Prior	328,188
Revolving	14,518
Revolving Converted to Term During the Period	246
Total	1,069,814
Business loans secured by real estate | CRE owner-occupied | >55-65%
Allowance for Loan Losses
2020	72,044
2019	91,028
2018	98,176
2017	94,712
2016	65,120
Prior	90,548
Revolving	0
Revolving Converted to Term During the Period	0
Total	511,628
Business loans secured by real estate | CRE owner-occupied | >65-75%
Allowance for Loan Losses
2020	71,692
2019	152,920
2018	79,106
2017	43,832
2016	31,303
Prior	31,493
Revolving	0
Revolving Converted to Term During the Period	0
Total	410,346
Business loans secured by real estate | CRE owner-occupied | Greater than 75%
Allowance for Loan Losses
2020	54,975
2019	21,122
2018	4,960
2017	13,354
2016	2,202
Prior	25,649
Revolving	0
Revolving Converted to Term During the Period	0
Total	122,262
Business loans secured by real estate | Franchise real estate secured
Allowance for Loan Losses
Total	347,932	353,240
Business loans secured by real estate | Franchise real estate secured | 55% and below
Allowance for Loan Losses
2020	20,801
2019	10,470
2018	13,864
2017	20,956
2016	9,189
Prior	16,213
Revolving	0
Revolving Converted to Term During the Period	0
Total	91,493
Business loans secured by real estate | Franchise real estate secured | >55-65%
Allowance for Loan Losses
2020	2,689
2019	9,955
2018	16,001
2017	19,102
2016	6,855
Prior	2,333
Revolving	0
Revolving Converted to Term During the Period	0
Total	56,935
Business loans secured by real estate | Franchise real estate secured | >65-75%
Allowance for Loan Losses
2020	19,349
2019	51,719
2018	23,258
2017	9,153
2016	10,597
Prior	7,236
Revolving	0
Revolving Converted to Term During the Period	0
Total	121,312
Business loans secured by real estate | Franchise real estate secured | Greater than 75%
Allowance for Loan Losses
2020	2,452
2019	10,944
2018	15,770
2017	47,788
2016	0
Prior	1,238
Revolving	0
Revolving Converted to Term During the Period	0
Total	78,192
Retail loans
Allowance for Loan Losses
2020	10,846
2019	7,833
2018	14,019
2017	14,064
2016	33,970
Prior	128,091
Revolving	30,680
Revolving Converted to Term During the Period	0
Total	239,503	305,999
Retail loans | Single family residential
Allowance for Loan Losses
Total	232,574	255,024
Retail loans | Single family residential | Greater than 740
Allowance for Loan Losses
2020	10,794
2019	6,531
2018	12,679
2017	8,846
2016	28,222
Prior	81,838
Revolving	19,588
Revolving Converted to Term During the Period	0
Total	168,498
Retail loans | Single family residential | >680 - 740
Allowance for Loan Losses
2020	0
2019	1,183
2018	1,303
2017	4,732
2016	2,614
Prior	15,624
Revolving	6,685
Revolving Converted to Term During the Period	0
Total	32,141
Retail loans | Single family residential | >580 - 680
Allowance for Loan Losses
2020	0
2019	0
2018	0
2017	461
2016	3,132
Prior	7,473
Revolving	864
Revolving Converted to Term During the Period	0
Total	11,930
Retail loans | Single family residential | Less than 580
Allowance for Loan Losses
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	19,970
Revolving	35
Revolving Converted to Term During the Period	0
Total	20,005
Retail loans | Consumer
Allowance for Loan Losses
Total	6,929	$ 50,975
Retail loans | Consumer | Greater than 740
Allowance for Loan Losses
2020	52
2019	69
2018	31
2017	22
2016	1
Prior	2,609
Revolving	2,198
Revolving Converted to Term During the Period	0
Total	4,982
Retail loans | Consumer | >680 - 740
Allowance for Loan Losses
2020	0
2019	35
2018	6
2017	3
2016	0
Prior	469
Revolving	1,227
Revolving Converted to Term During the Period	0
Total	1,740
Retail loans | Consumer | >580 - 680
Allowance for Loan Losses
2020	0
2019	15
2018	0
2017	0
2016	1
Prior	95
Revolving	56
Revolving Converted to Term During the Period	0
Total	167
Retail loans | Consumer | Less than 580
Allowance for Loan Losses
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	13
Revolving	27
Revolving Converted to Term During the Period	0
Total	$ 40

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Real Estate Owned
Balance, beginning of year	$ 441	$ 147	$ 326
Acquisitions	0	0	524
Foreclosures	208	644	15
Sales	(537)	(329)	(1,055)
Gain (loss) on sale	(57)	(20)	346
Write downs	(55)	(1)	(9)
Balance, end of year	$ 0	$ 441	$ 147

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment	$ 122,003	$ 90,445
Less: accumulated depreciation	43,119	31,444
Total	78,884	59,001
Depreciation expense for premises and equipment	13,300	9,800	$ 7,700
Land
Property, Plant and Equipment [Line Items]
Property and equipment	16,090	13,820
Premises
Property, Plant and Equipment [Line Items]
Property and equipment	20,371	16,697
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	36,634	25,884
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	48,723	33,871
Automobiles
Property, Plant and Equipment [Line Items]
Property and equipment	$ 185	$ 173

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	Jul. 01, 2018	Jun. 30, 2020	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 01, 2020	Dec. 31, 2017
Goodwill [Line Items]
Goodwill			$ 898,569,000				$ 898,569,000	$ 808,322,000	$ 808,726,000		$ 493,329,000
Purchase accounting adjustments							(2,597,000)	(404,000)	2,354,000
Goodwill acquired during the year							92,844,000	0	313,043,000
Impairment losses			0	$ 0	$ 0
Net intangible assets			85,507,000				85,507,000	83,312,000	100,556,000
Additions due to acquisitions							19,267,000	0	71,136,000
Estimated amortization expense for 2021			15,900,000				15,900,000
Estimated amortization expense for 2022			14,000,000				14,000,000
Estimated amortization expense for 2023			12,300,000				12,300,000
Estimated amortization expense for 2024			11,100,000				11,100,000
Estimated amortization expense for 2025			10,000,000				10,000,000
Core Deposits
Goodwill [Line Items]
Net intangible assets			82,500,000				$ 82,500,000
Core Deposits | Minimum
Goodwill [Line Items]
Weighted average useful life (in years)							6 years
Core Deposits | Maximum
Goodwill [Line Items]
Weighted average useful life (in years)							11 years
Customer Relationships
Goodwill [Line Items]
Net intangible assets			$ 3,000,000				$ 3,000,000
Opus
Goodwill [Line Items]
Goodwill										$ 90,247,000
Purchase accounting adjustments		$ 2,600,000
Additions due to acquisitions							$ 19,300,000
Grandpoint Capital, Inc.
Goodwill [Line Items]
Goodwill	$ 312,639,000
Purchase accounting adjustments						$ 580,000		$ (404,000)
Goodwill acquired during the year	$ 312,600,000								313,000,000
Plaza Bancorp
Goodwill [Line Items]
Goodwill acquired during the year									1,800,000
Heritage Oaks Bank
Goodwill [Line Items]
Goodwill acquired during the year									$ 600,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Goodwill Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Balance, beginning of year	$ 808,322	$ 808,726	$ 493,329
Goodwill acquired during the year	92,844	0	313,043
Purchase accounting adjustments	(2,597)	(404)	2,354
Balance, end of year	898,569	808,322	808,726
Accumulated impairment losses at end of year	$ 0	$ 0	$ 0

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Net Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gross balance of intangible assets:
Balance, beginning of year	$ 125,945	$ 125,945	$ 54,809
Additions due to acquisitions	19,267	0	71,136
Balance, end of year	145,212	125,945	125,945
Accumulated amortization:
Balance, beginning of year	(42,633)	(25,389)	(11,795)
Amortization	(17,072)	(17,245)	(13,594)
Amortization		(17,244)
Balance, end of year	(59,705)	(42,633)	(25,389)
Net intangible assets, end of year	$ 85,507	$ 83,312	$ 100,556

Bank Owned Life Insurance (Deta

Bank Owned Life Insurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 01, 2020
Business Acquisition [Line Items]
Bank owned life insurance	$ 292,564	$ 113,376
Income from bank owned life insurance, non-interest income	$ 7,200	$ 3,500	$ 3,400
Opus
Business Acquisition [Line Items]
Bank owned life insurance				$ 191,400

Investments in Qualified Affo_3

Investments in Qualified Affordable Housing Partnerships - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2020
Business Acquisition [Line Items]
Period of tax credits	10 years
Amortization method investments in qualified affordable housing projects	$ 86,800,000	$ 49,900,000
Cost method investments in qualified affordable housing projects	3,000,000	4,000,000
Net investment in qualified affordable housing projects	89,800,000	53,900,000
Total unfunded commitments related to investments in qualified affordable housing funds	18,078,000	21,400,000
Impairment losses related to LIHTC investments	$ 0	$ 0	$ 0
Opus
Business Acquisition [Line Items]
Amortization method investments in qualified affordable housing projects				$ 45,400,000

Investments in Qualified Affo_4

Investments in Qualified Affordable Housing Partnerships - Estimates for Unfunded Affordable Housing Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Banks [Abstract]
2021	$ 10,548
2022	4,627
2023	1,032
2024	492
2025	250
Thereafter	1,129
Total unfunded commitments	18,078	$ 21,400
Tax credit and other tax benefits recognized	11,435	6,506	$ 4,748
Amortization of investments	$ 9,674	$ 5,527	$ 4,574

Variable Interest Entities - Su

Variable Interest Entities - Summary of Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Investment securities available-for-sale	$ 3,931,115	$ 1,368,384
Accrued expenses and other liabilities	243,207	131,367
Other assets	292,861	154,992
Assets	19,736,544	11,776,012
Liabilities	16,989,895	9,763,418
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss	223,509	32,466
Assets	190,686	53,880
Liabilities	18,526	21,414
Multifamily Loan Securitization | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investment securities available-for-sale	100,927	0
Accrued expenses and other liabilities	448	0
Multifamily Loan Securitization, Asset | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss	100,927	0
Multifamily Loan Securitization, Liability | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss	50,901	0
Affordable Housing Partnership | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Accrued expenses and other liabilities	18,078	21,414
Other assets	89,759	53,880
Affordable Housing Partnership, Asset | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss	71,681	32,466
Affordable Housing Partnership, Liability | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss	$ 0	$ 0

Variable Interest Entities - Na

Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Accrued expenses and other liabilities	$ 243,207	$ 131,367
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss	$ 223,509	32,466
Multifamily Loan Securitization, Liability | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Maximum loss, percentage of loans	10.00%
Maximum loss	$ 50,901	0
Multifamily Loan Securitization | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Accrued expenses and other liabilities	$ 448	$ 0

Deposit Accounts - Deposit Acco

Deposit Accounts - Deposit Accounts and Weighted Average Interest Rates (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Transaction accounts
Noninterest-bearing checking	$ 6,011,106	$ 3,857,660
Interest-bearing checking	2,913,260	586,019
Money market	5,302,073	3,171,164
Savings	360,896	235,824
Certificates of deposit accounts
$250,000 or less	800,957	500,331
Greater than $250,000	825,885	547,511
Total certificates of deposit accounts	1,626,842	1,047,842
Total deposits	$ 16,214,177	$ 8,898,509
Transaction accounts
Noninterest-bearing checking (as a percent)	0.00%	0.00%
Interest-bearing checking (as a percent)	0.06%	0.43%
Money market (as a percent)	0.23%	0.83%
Savings (as a percent)	0.09%	0.16%
Certificates of deposit accounts
Less than $100,000 (as a percent)	0.88%	1.59%
Greater than $250,000 (as a percent)	0.88%	1.77%
Total	0.88%	1.69%
Total deposits (as a percent)	0.18%	0.53%

Deposit Accounts - Aggregate An

Deposit Accounts - Aggregate Annual Maturities of Certificates of Deposit Accounts (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amount
Within 3 months	$ 692,493
4 to 6 months	363,533
7 to 12 months	377,731
13 to 24 months	86,934
25 to 36 months	13,217
37 to 60 months	9,576
Over 60 months	83,358
Total certificates of deposit accounts	$ 1,626,842	$ 1,047,842
Weighted Average Interest Rate
Within 3 months	0.81%
4 to 6 months	1.12%
7 to 12 months	0.89%
13 to 24 months	0.82%
25 to 36 months	1.56%
37 to 60 months	1.24%
Over 60 months	0.35%
Total	0.88%	1.69%

Deposit Accounts - Interest Exp

Deposit Accounts - Interest Expense on Deposit Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest expense on deposit accounts
Checking accounts	$ 3,295	$ 2,340	$ 1,167
Money market accounts	19,903	28,279	19,567
Savings	393	382	357
Certificates of deposit accounts	10,745	27,296	16,562
Total	$ 34,336	$ 58,297	$ 37,653

Deposit Accounts - Narrative (D

Deposit Accounts - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deposits Liabilities [Abstract]
Accrued interest on deposits	$ 507	$ 590

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances and Other Borrowings - Narrative (Details)	12 Months Ended
	Dec. 31, 2020USD ($)bank	Dec. 31, 2019USD ($)	Jul. 01, 2019USD ($)
Federal Home Loan Bank Advances and Other Borrowings
Maximum percentage of assets up to which advances will be provided by FHLB	40.00%
Maximum credit line available from FHLB	$ 7,940,000,000
Additional available advances	4,740,000,000
Aggregate principal balance of real estate loans used to collateralize FHLB advances	7,250,000,000
Overnight FHLB advances		$ 491,000,000
Maximum amount outstanding in respect of term advances	31,000,000	26,000,000
Eight Correspondent Banks | Line of Credit
Federal Home Loan Bank Advances and Other Borrowings
Amount outstanding	0	0
US Bank | Line of Credit
Federal Home Loan Bank Advances and Other Borrowings
Unused facility			$ 15,000,000
Amount outstanding	$ 0	$ 0
Unsecured lines of credit | Eight Correspondent Banks | Line of Credit
Federal Home Loan Bank Advances and Other Borrowings
Number of correspondent banks | bank	8
Unused facility	$ 340,000,000
Federal Reserve discount window | Eight Correspondent Banks | Line of Credit
Federal Home Loan Bank Advances and Other Borrowings
Unused facility	$ 21,300,000
Minimum
Federal Home Loan Bank Advances and Other Borrowings
Term advances, rate	0.00%
Maximum
Federal Home Loan Bank Advances and Other Borrowings
Term advances, rate	2.47%

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances and Other Borrowings - Activities in advances from the FHLB (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Advances from Federal Home Loan Banks [Abstract]
Average balance outstanding	$ 139,190	$ 404,959
Weighted average rate	1.10%	2.43%
Maximum amount outstanding at any month-end during the year	$ 521,017	$ 1,091,596
Balance outstanding at end of year	$ 31,000	$ 517,026
Weighted average interest rate at year-end	1.53%	1.69%

Federal Home Loan Bank Advanc_5

Federal Home Loan Bank Advances and Other Borrowings - Activities in other borrowings (Details) - Other Borrowings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Average balance outstanding	$ 251	$ 229
Weighted average rate	0.16%	0.63%
Maximum amount outstanding at any month-end during the year	$ 5,000	$ 10,000
Balance outstanding at end of year	$ 0	$ 0
Weighted average rate	0.00%	0.00%

Subordinated Debentures - Narra

Subordinated Debentures - Narrative (Details)	Jun. 01, 2020USD ($)	Nov. 01, 2017USD ($)note	Jun. 30, 2020USD ($)	May 31, 2019USD ($)	Dec. 31, 2020USD ($)subsidiaryloan	Dec. 31, 2019USD ($)	Apr. 01, 2017USD ($)	Aug. 31, 2014USD ($)
Debt Instrument [Line Items]
Subordinated debentures					$ 501,511,000	$ 215,145,000
Increase to carrying value of subordinated debt					286,400,000
Debt issued					$ 505,403,000
Number of trust subsidiaries | subsidiary					2
Opus
Debt Instrument [Line Items]
Subordinated debt	$ 138,653,000
Subordinated notes
Debt Instrument [Line Items]
Number of subordinated debt instruments | loan					5
Subordinated debentures					$ 493,410,000	207,187,000
Debt issued					$ 495,000,000
Subordinated notes | Heritage Oaks Bank
Debt Instrument [Line Items]
Effective rate (as a percent)					1.945%
Purchase accounting fair value adjustments					$ (1,100,000)
Subordinated debt					4,100,000
Subordinated notes | Santa Lucia Bancorp (CA) Capital Trust
Debt Instrument [Line Items]
Subordinated debentures					$ 4,000,000
Effective rate (as a percent)					1.72%
Purchase accounting fair value adjustments					$ (1,200,000)
Subordinated notes | Opus
Debt Instrument [Line Items]
Purchase accounting fair value adjustments					3,400,000
Subordinated notes | Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter
Debt Instrument [Line Items]
Subordinated debentures					147,501,000	0
Debt issued			$ 150,000,000		$ 150,000,000
Fixed interest rate (as a percent)			5.375%		5.375%
Unamortized debt issuance costs					$ 2,500,000
Offering price, percentage of aggregate principal amount			100.00%
Subordinated notes | Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter | SOFR
Debt Instrument [Line Items]
Floating interest rate, basis points added to base rate (as a percent)			5.17%		0.0517%
Subordinated notes | Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter
Debt Instrument [Line Items]
Subordinated debentures					$ 138,371,000	0
Debt issued	$ 135,000,000				$ 135,000,000
Fixed interest rate (as a percent)	5.50%				5.50%
Subordinated notes | Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter | LIBOR
Debt Instrument [Line Items]
Floating interest rate, basis points added to base rate (as a percent)	4.285%				0.00043%
Subordinated notes | Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter | Opus
Debt Instrument [Line Items]
Subordinated debentures					$ 138,400,000
Subordinated notes | Subordinated notes due 2024, 5.75% per annum
Debt Instrument [Line Items]
Subordinated debentures					59,552,000	59,432,000
Debt issued					$ 60,000,000			$ 60,000,000
Fixed interest rate (as a percent)					5.75%			5.75%
Unamortized debt issuance costs					$ 448,000
Percentage of Notes I qualified as Tier 2 Capital as remaining maturity is less than four years					60.00%
Percentage of Notes I qualified as Tier 2 Capital as remaining maturity is less than five years					80.00%
Subordinated notes | Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter
Debt Instrument [Line Items]
Subordinated debentures					$ 122,877,000	122,622,000
Debt issued				$ 125,000,000	$ 125,000,000
Fixed interest rate (as a percent)				4.875%	4.875%
Unamortized debt issuance costs					$ 2,100,000
Public offering price				100.00%
Subordinated notes | Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter | LIBOR
Debt Instrument [Line Items]
Floating interest rate, basis points added to base rate (as a percent)				2.50%	4.90%
Subordinated notes | Subordinated notes due 2025, 7.125% per annum
Debt Instrument [Line Items]
Subordinated debentures					$ 25,109,000	25,133,000
Debt issued		$ 25,000,000			$ 25,000,000
Fixed interest rate (as a percent)		7.125%			7.125%
Purchase accounting fair value adjustments					$ 109,000
Number of subordinated notes assumed | note		3
Redemption price (as a percent)		103.00%
Redemption price, subsequent reduction (as a percent)		0.50%
Carrying value of subordinated notes					$ 25,100,000
Subordinated debt
Debt Instrument [Line Items]
Number of subordinated debt instruments | loan					2
Subordinated debentures					$ 8,101,000	7,958,000
Debt issued					10,403,000
Subordinated debt | Heritage Oaks Bank
Debt Instrument [Line Items]
Subordinated debentures					4,121,000	4,054,000
Debt issued					$ 5,248,000		$ 5,200,000
Effective rate (as a percent)					1.95%
Subordinated debt | Santa Lucia Bancorp (CA) Capital Trust
Debt Instrument [Line Items]
Subordinated debentures					$ 3,980,000	$ 3,904,000
Debt issued					$ 5,155,000
Effective rate (as a percent)					1.72%
Subordinated debt | LIBOR | Heritage Oaks Bank
Debt Instrument [Line Items]
Floating interest rate, basis points added to base rate (as a percent)					1.72%
Subordinated debt | LIBOR | Santa Lucia Bancorp (CA) Capital Trust
Debt Instrument [Line Items]
Floating interest rate, basis points added to base rate (as a percent)					1.48%

Subordinated Debentures - Outst

Subordinated Debentures - Outstanding Subordinated Debentures (Details) - USD ($)	Jun. 01, 2020	Jun. 30, 2020	May 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Nov. 01, 2017	Apr. 01, 2017	Aug. 31, 2014
Debt Instrument [Line Items]
Current Principal Balance				$ 505,403,000
Subordinated debentures				501,511,000	$ 215,145,000
Subordinated notes
Debt Instrument [Line Items]
Current Principal Balance				495,000,000
Subordinated debentures				$ 493,410,000	207,187,000
Subordinated notes | Heritage Oaks Bank
Debt Instrument [Line Items]
Current Interest Rate				1.945%
Subordinated notes | Santa Lucia Bancorp (CA) Capital Trust
Debt Instrument [Line Items]
Current Interest Rate				1.72%
Subordinated debentures				$ 4,000,000
Subordinated notes | Subordinated notes due 2024, 5.75% per annum
Debt Instrument [Line Items]
Current Interest Rate				5.75%				5.75%
Current Principal Balance				$ 60,000,000				$ 60,000,000
Subordinated debentures				$ 59,552,000	59,432,000
Subordinated notes | Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter
Debt Instrument [Line Items]
Current Interest Rate			4.875%	4.875%
Current Principal Balance			$ 125,000,000	$ 125,000,000
Subordinated debentures				$ 122,877,000	122,622,000
Subordinated notes | Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter | LIBOR
Debt Instrument [Line Items]
Variable rate			2.50%	4.90%
Subordinated notes | Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter
Debt Instrument [Line Items]
Current Interest Rate		5.375%		5.375%
Current Principal Balance		$ 150,000,000		$ 150,000,000
Subordinated debentures				$ 147,501,000	0
Subordinated notes | Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter | SOFR
Debt Instrument [Line Items]
Variable rate		5.17%		0.0517%
Subordinated notes | Subordinated notes due 2025, 7.125% per annum
Debt Instrument [Line Items]
Current Interest Rate				7.125%		7.125%
Current Principal Balance				$ 25,000,000		$ 25,000,000
Subordinated debentures				$ 25,109,000	25,133,000
Subordinated notes | Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter
Debt Instrument [Line Items]
Current Interest Rate	5.50%			5.50%
Current Principal Balance	$ 135,000,000			$ 135,000,000
Subordinated debentures				$ 138,371,000	0
Subordinated notes | Subordinated notes due 2026, 5.5% per annum until June 30 2021, 3-month LIBOR +4.285% thereafter | LIBOR
Debt Instrument [Line Items]
Variable rate	4.285%			0.00043%
Subordinated debt
Debt Instrument [Line Items]
Current Principal Balance				$ 10,403,000
Subordinated debentures				$ 8,101,000	7,958,000
Subordinated debt | Heritage Oaks Bank
Debt Instrument [Line Items]
Current Interest Rate				1.95%
Current Principal Balance				$ 5,248,000			$ 5,200,000
Subordinated debentures				$ 4,121,000	4,054,000
Subordinated debt | Santa Lucia Bancorp (CA) Capital Trust
Debt Instrument [Line Items]
Current Interest Rate				1.72%
Current Principal Balance				$ 5,155,000
Subordinated debentures				$ 3,980,000	$ 3,904,000
Subordinated debt | LIBOR | Heritage Oaks Bank
Debt Instrument [Line Items]
Variable rate				1.72%
Subordinated debt | LIBOR | Santa Lucia Bancorp (CA) Capital Trust
Debt Instrument [Line Items]
Variable rate				1.48%

Subordinated Debentures - Summa

Subordinated Debentures - Summarized Activities of Subordinated Debentures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Weighted average interest rate at year-end	5.38%	5.37%
Subordinated notes
Debt Instrument [Line Items]
Average balance outstanding	$ 377,037	$ 183,383
Weighted average rate	5.48%	5.82%
Maximum amount outstanding at any month-end during the year	$ 501,511	$ 233,199
Balance outstanding at end of year	$ 501,511	$ 215,145

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current income tax provision:
Federal									$ 32,129	$ 34,124	$ 19,787
State									22,743	16,415	13,178
Total current income tax provision									54,872	50,539	32,965
Deferred income tax (benefit) provision:
Federal									(26,554)	4,645	8,142
Effect of the Tax Act									0	0	(1,441)
State									(16,068)	2,851	2,574
Total deferred income tax (benefit) provision									(42,622)	7,496	9,275
Total income tax provision	$ 22,800	$ 23,949	$ (40,324)	$ 5,825	$ 13,109	$ 15,492	$ 14,168	$ 15,266	$ 12,250	$ 58,035	$ 42,240

Income Taxes - Reconciliation f

Income Taxes - Reconciliation from Statutory Federal Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation from statutory federal income taxes to the company's effective income taxes
Statutory federal income tax provision									$ 15,246	$ 45,729	$ 34,803
State taxes, net of federal income tax effect									4,757	15,764	12,724
Cash surrender life insurance									(1,163)	(565)	(582)
Tax exempt interest									(4,073)	(1,503)	(1,135)
Non-deductible merger costs									703	0	375
LIHTC investments									(2,259)	(1,570)	(761)
Effect of the Tax Act									0	0	(1,441)
Stock-based compensation shortfall (windfall) tax impact									407	(728)	(1,811)
Effect of the CARES Act									2,636	0	0
Section 162(m) of the Internal Revenue Code									968	530	145
Other									300	378	(77)
Total income tax provision	$ 22,800	$ 23,949	$ (40,324)	$ 5,825	$ 13,109	$ 15,492	$ 14,168	$ 15,266	$ 12,250	$ 58,035	$ 42,240

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Effect of the Tax Act, income tax expense	$ 5,600
Effect of the Tax Act, income tax benefit				$ 1,400
Effect of the CARES Act		$ 2,636	$ 0	0
Minimum cumulative change in ownership that could result in a Section 382 ownership change (as a percent)		50.00%
Tax credit carryforward		$ 3,300
Amount of unrecognized tax benefits		255	2,906	$ 2,906
Tax benefits that would impact the effective tax rate		184	0
Interest and penalties accrued related to unrecognized tax benefits		22,000	$ 424,000
Federal income tax purpose
Income Taxes
Net operating loss carryforward		29,000
California franchise tax purpose
Income Taxes
Net operating loss carryforward		$ 7,000

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Accrued expenses	$ 1,307,000	$ 2,126,000
Net operating loss	6,614,000	4,765,000
Allowance for credit losses, net of bad debt charge-offs	85,700,000	10,415,000
Deferred compensation	3,489,000	3,616,000
State taxes	4,395,000	3,746,000
Loan discount	32,484,000	11,634,000
Stock-based compensation	4,618,000	3,535,000
Operating lease liabilities	24,463,000	13,334,000
Federal and state credit carryovers	3,750,000	416,000
Other	1,782,000	0
Total deferred tax assets	168,602,000	53,587,000
Deferred tax liabilities:
Operating lease right-of-use assets	(21,756,000)	(12,382,000)
Deferred FDIC gain	(108,000)	(228,000)
Core deposit intangibles	(21,828,000)	(22,415,000)
Loan origination costs	(5,176,000)	(4,828,000)
Depreciation	(6,551,000)	(1,814,000)
Unrealized gain on available for sale securities	(24,127,000)	(8,639,000)
Other	0	(4,652,000)
Total deferred tax liabilities	(79,546,000)	(54,958,000)
Valuation allowance	0	0
Net deferred tax asset (liabilities)	$ 89,056,000
Net deferred tax asset (liabilities)		$ (1,371,000)

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1,	$ 2,906	$ 2,906
Increases based on tax positions related to prior years	233	0
Decreases related to lapse of statute of limitation	(2,884)	0
Balance at December 31,	$ 255	$ 2,906

Commitments, Contingencies an_2

Commitments, Contingencies and Concentrations of Risk (Details) - Employment Agreements	12 Months Ended
	Dec. 31, 2020
CEO
Employment Agreements
Term of agreements (in years)	3 years
Chief Operating Officer
Employment Agreements
Term of agreements (in years)	1 year
Chief Financial Officer
Employment Agreements
Term of agreements (in years)	1 year
Chief Risk Officer
Employment Agreements
Term of agreements (in years)	1 year
Chief Innovation Officer
Employment Agreements
Term of agreements (in years)	1 year

Benefit Plans - Narrative (Deta

Benefit Plans - Narrative (Details)	1 Months Ended		12 Months Ended
	May 31, 2012shares	May 31, 2004shares	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)	May 31, 2017shares	May 31, 2015shares	May 31, 2014shares
Defined Benefit Plan Disclosure [Line Items]
Employer's match of employees' contributions of the first 3% of eligible compensation (as a percent)			100.00%	100.00%	100.00%
Percentage of eligible compensation, matched 100% by employer			3.00%	3.00%	3.00%
Employer's match of employees' contributions of the next 2% of eligible compensation (as a percent)			50.00%	50.00%	50.00%
Percentage of eligible compensation, matched 50% by employer			2.00%	2.00%	2.00%
Contributions made | $			$ 4,100,000	$ 2,900,000	$ 2,500,000
Intrinsic value | $			1,700,000	4,200,000	8,400,000
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits | Opus
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation liability | $			98,000
Supplemental Employee Retirement Plan | Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits | Plaza Bancorp
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation liability | $			1,700,000	1,800,000
Supplemental Employee Retirement Plan | Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits | Executive Officer
Defined Benefit Plan Disclosure [Line Items]
Amounts expensed | $			511,000	674,000	827,000
Amounts recorded as liability | $			$ 10,400,000	$ 10,800,000	10,900,000
Stock option
Defined Benefit Plan Disclosure [Line Items]
Number of options outstanding (in shares)			309,315	453,104
Granted (in shares)			9,538
Compensation expense | $			$ 8,000	$ 132,000	571,000
Unrecognized compensation expense | $			0
Restricted Stock
Defined Benefit Plan Disclosure [Line Items]
Compensation expense | $			10,800,000	$ 10,400,000	$ 8,500,000
Unrecognized compensation expense | $			16,900,000
Grant date fair value | $			$ 15,700,000
Weighted-average period of recognition			2 years 3 months 25 days
2004 Long-Term Incentive Plan
Defined Benefit Plan Disclosure [Line Items]
Number of shares authorized (in shares)		525,500
Term of plan (in years)		10 years
Vesting percentage per year		33.30%
Number of options outstanding (in shares)			0
Granted (in shares)			0
2012 Plan
Defined Benefit Plan Disclosure [Line Items]
Number of shares authorized (in shares)	620,000					3,580,000		800,000
Term of plan (in years)	10 years
Number of options outstanding (in shares)			279,466
Granted (in shares)			2,168,227
2014 Plan
Defined Benefit Plan Disclosure [Line Items]
Number of shares authorized (in shares)								1,420,000
2017 Plan
Defined Benefit Plan Disclosure [Line Items]
Number of shares authorized (in shares)						5,000,000
2015 Equity Based Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Number of shares authorized (in shares)			250,000				630,473
Shares issued ratio, actual number of shares							2
Number of options outstanding (in shares)			16,358
Granted (in shares)			656,450
2005 Long-Term Incentive Plan
Defined Benefit Plan Disclosure [Line Items]
Number of options outstanding (in shares)			13,491
Granted (in shares)			0
Minimum
Defined Benefit Plan Disclosure [Line Items]
Employee contribution, as a percentage of compensation			1.00%
Minimum | 2012 Plan
Defined Benefit Plan Disclosure [Line Items]
Award vesting period (in years)	1 year
Maximum
Defined Benefit Plan Disclosure [Line Items]
Employee contribution, as a percentage of compensation			99.00%
Maximum | 2012 Plan
Defined Benefit Plan Disclosure [Line Items]
Award vesting period (in years)	5 years

Benefit Plans - Stock Option Ac

Benefit Plans - Stock Option Activities in the Plans (Details) - Stock option $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)$ / sharesshares
Number of Stock Options Outstanding
Outstanding, beginning balance (in shares) | shares	453,104
Granted (in shares) | shares	9,538
Exercised (in shares) | shares	(139,739)
Forfeited and expired (in shares) | shares	(13,588)
Outstanding, ending balance (in shares) | shares	309,315
Vested and exercisable, ending balance (in shares) | shares	309,315
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 16.26
Granted (in dollars per share) | $ / shares	22.22
Exercised (in dollars per share) | $ / shares	19.94
Forfeited and expired (in dollars per share) | $ / shares	20.85
Outstanding, ending balance (in dollars per share) | $ / shares	16.84
Vested and exercisable, ending balance (in dollars per shares) | $ / shares	$ 16.84
Weighted Average Remaining Contractual Term
Outstanding at December 31, 2020	3 years 10 months 13 days
Vested and exercisable at December 31, 2020	3 years 10 months 13 days
Aggregate Intrinsic value
Outstanding at December 31, 2020 | $	$ 4,480
Vested and exercisable at December 31, 2020 | $	$ 4,480

Benefit Plans - Restricted Stoc

Benefit Plans - Restricted Stock Awards and Restricted Stock Units (Details) - Restricted Stock	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Shares
Unvested at the beginning of the year (in shares) | shares	739,933
Granted (in shares) | shares	782,450
Vested (in shares) | shares	(182,497)
Forfeited (in shares) | shares	(70,642)
Unvested at the end of the year (in shares) | shares	1,269,244
Weighted Average Grant-Date Fair Value Per Share
Unvested at the beginning of the year (in dollars per share) | $ / shares	$ 35.11
Granted (in dollars per share) | $ / shares	20.02
Vested (in dollars per share) | $ / shares	33.78
Forfeited (in dollars per share) | $ / shares	28.85
Unvested at the end of the year (in dollars per share) | $ / shares	$ 26.35

Financial Instruments with Of_2

Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Financial Instruments with Off-Balance Sheet Risk
Allowance for credit losses on off-balance sheet credit exposures	$ 31,100	$ 3,279	$ 3,300
Commitments to extend credit
Financial Instruments with Off-Balance Sheet Risk
Financial instruments with off-balance sheet risk	1,950,000		$ 1,580,000
Undisbursed Commitments For C&I Loans
Financial Instruments with Off-Balance Sheet Risk
Financial instruments with off-balance sheet risk	$ 1,520,000

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Level 1
Financial assets
Derivative asset	$ 0	$ 0
Financial liabilities
Derivative liability	0	0
Level 2
Financial assets
Derivative asset	12,053	2,103
Financial liabilities
Derivative liability	12,066	2,103
Level 3
Financial assets
Derivative asset	1,914	0
Financial liabilities
Derivative liability	0	0
Fair Value, Recurring
Financial assets
Securities available for sale:	3,931,115	1,368,384
Derivative asset	13,967	2,103
Financial liabilities
Derivative liability	12,066	2,103
Fair Value, Recurring | Interest rate swap contracts
Financial assets
Derivative asset	12,053
Fair Value, Recurring | Equity warrants
Financial assets
Derivative asset	1,914
Fair Value, Recurring | U.S. Treasury
Financial assets
Securities available for sale:	32,533	63,555
Fair Value, Recurring | Agency
Financial assets
Securities available for sale:	690,386	246,358
Fair Value, Recurring | Corporate debt
Financial assets
Securities available for sale:	415,308	151,353
Fair Value, Recurring | Municipal bonds
Financial assets
Securities available for sale:	1,446,019	397,298
Fair Value, Recurring | Collateralized mortgage obligations
Financial assets
Securities available for sale:	513,366	9,984
Fair Value, Recurring | Mortgage-backed securities
Financial assets
Securities available for sale:	833,503	499,836
Fair Value, Recurring | Level 1
Financial assets
Securities available for sale:	0	0
Derivative asset	0	0
Financial liabilities
Derivative liability	0	0
Fair Value, Recurring | Level 1 | Interest rate swap contracts
Financial assets
Derivative asset	0
Fair Value, Recurring | Level 1 | Equity warrants
Financial assets
Derivative asset	0
Fair Value, Recurring | Level 1 | U.S. Treasury
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 1 | Agency
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 1 | Corporate debt
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 1 | Municipal bonds
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 1 | Collateralized mortgage obligations
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 1 | Mortgage-backed securities
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 2
Financial assets
Securities available for sale:	3,931,115	1,368,384
Derivative asset	12,053	2,103
Financial liabilities
Derivative liability	12,066	2,103
Fair Value, Recurring | Level 2 | Interest rate swap contracts
Financial assets
Derivative asset	12,053
Fair Value, Recurring | Level 2 | Equity warrants
Financial assets
Derivative asset	0
Fair Value, Recurring | Level 2 | U.S. Treasury
Financial assets
Securities available for sale:	32,533	63,555
Fair Value, Recurring | Level 2 | Agency
Financial assets
Securities available for sale:	690,386	246,358
Fair Value, Recurring | Level 2 | Corporate debt
Financial assets
Securities available for sale:	415,308	151,353
Fair Value, Recurring | Level 2 | Municipal bonds
Financial assets
Securities available for sale:	1,446,019	397,298
Fair Value, Recurring | Level 2 | Collateralized mortgage obligations
Financial assets
Securities available for sale:	513,366	9,984
Fair Value, Recurring | Level 2 | Mortgage-backed securities
Financial assets
Securities available for sale:	833,503	499,836
Fair Value, Recurring | Level 3
Financial assets
Securities available for sale:	0	0
Derivative asset	1,914	0
Financial liabilities
Derivative liability	0	0
Fair Value, Recurring | Level 3 | Interest rate swap contracts
Financial assets
Derivative asset	0
Fair Value, Recurring | Level 3 | Equity warrants
Financial assets
Derivative asset	1,914
Fair Value, Recurring | Level 3 | U.S. Treasury
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 3 | Agency
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 3 | Corporate debt
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 3 | Municipal bonds
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 3 | Collateralized mortgage obligations
Financial assets
Securities available for sale:	0	0
Fair Value, Recurring | Level 3 | Mortgage-backed securities
Financial assets
Securities available for sale:	$ 0	$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Reconciliation of Fair Value of Equity Warrants (Details) - Equity warrants - Level 3 $ in Thousands	7 Months Ended
	Dec. 31, 2020USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance as of June 1, 2020	$ 5,162
Change in fair value	(41)
Sales	(3,207)
Ending balance as of December 31, 2020	$ 1,914

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Quantitative Information about Level 3 Fair Value Measurements (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	$ 13,351,092	$ 8,691,019
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants	$ 1,914
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Volatility | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.3000
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Volatility | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.3500
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Volatility | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.3119
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Risk free interest rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.0013
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Risk free interest rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.0036
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Risk free interest rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.0018
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Marketability Discount | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.0600
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Marketability Discount | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.1600
Fair Value, Recurring | Level 3 | Black-Scholes option pricing model | Marketability Discount | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity warrants, input	0.1351
Fair Value, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	$ 4,077	2,257
Fair Value, Nonrecurring | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	4,077	2,257
Fair Value, Nonrecurring | Level 3 | Fair value of collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable		2,257
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | CRE non-owner-occupied
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	$ 198	$ 569
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | CRE non-owner-occupied | Collateral discount and cost to sell | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | CRE non-owner-occupied | Collateral discount and cost to sell | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | CRE non-owner-occupied | Collateral discount and cost to sell | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | SBA secured by real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	$ 746	$ 408
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | SBA secured by real estate | Collateral discount and cost to sell | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | SBA secured by real estate | Collateral discount and cost to sell | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Investor loans secured by real estate | SBA secured by real estate | Collateral discount and cost to sell | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Business loans secured by real estate | SBA secured by real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	$ 386	$ 140
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Business loans secured by real estate | SBA secured by real estate | Collateral discount and cost to sell | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.0700	0.0700
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Business loans secured by real estate | SBA secured by real estate | Collateral discount and cost to sell | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Business loans secured by real estate | SBA secured by real estate | Collateral discount and cost to sell | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.0909	0.0781
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | Commercial and industrial
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	$ 2,040
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | Commercial and industrial | Collateral discount and cost to sell | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.0700
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | Commercial and industrial | Collateral discount and cost to sell | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.1000
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | Commercial and industrial | Collateral discount and cost to sell | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.0906
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | SBA non-real estate secured
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	$ 707	$ 1,140
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | SBA non-real estate secured | Collateral discount and cost to sell | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.0700	0.0700
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | SBA non-real estate secured | Collateral discount and cost to sell | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.0700	0.6300
Fair Value, Nonrecurring | Level 3 | Fair value of collateral | Commercial loans | SBA non-real estate secured | Collateral discount and cost to sell | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, input	0.0700	0.1533

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Narrative (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Specific reserve recorded on loan	$ 126	$ 0
Measurement Input, Discount Rate [Member] | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input	0.07
Measurement Input, Discount Rate [Member] | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input	0.10

Fair Value of Financial Instr_7

Fair Value of Financial Instruments - Assets Measured at Fair Value on a Noncrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Level 1
Fair Value Disclosures
Individually evaluated loans/Impaired loans	$ 0	$ 0
Level 2
Fair Value Disclosures
Individually evaluated loans/Impaired loans	0	0
Level 3
Fair Value Disclosures
Individually evaluated loans/Impaired loans	13,351,092	8,691,019
Fair Value, Nonrecurring
Fair Value Disclosures
Individually evaluated loans/Impaired loans	4,077	2,257
Fair Value, Nonrecurring | Level 1
Fair Value Disclosures
Individually evaluated loans/Impaired loans	0	0
Fair Value, Nonrecurring | Level 2
Fair Value Disclosures
Individually evaluated loans/Impaired loans	0	0
Fair Value, Nonrecurring | Level 3
Fair Value Disclosures
Individually evaluated loans/Impaired loans	$ 4,077	$ 2,257

Fair Value of Financial Instr_8

Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets:
Investments held-to-maturity	$ 25,013	$ 38,760
Investment securities available-for-sale	3,931,115	1,368,384
Accrued interest receivable	74,574	39,442
Liabilities:
FHLB advances	31,000	517,026
Level 1
Assets:
Cash and cash equivalents	880,766	326,850
Investments held-to-maturity	0	0
Investment securities available-for-sale	0	0
Loans held for sale	0	0
Loans held for investment, net	0	0
Derivative asset	0	0
Accrued interest receivable	74,574	39,442
Liabilities:
Deposit accounts	14,587,335	7,850,667
FHLB advances	0	0
Subordinated debentures	0	0
Derivative liability	0	0
Accrued interest payable	6,569	2,686
Level 2
Assets:
Cash and cash equivalents	0	0
Investments held-to-maturity	25,013	38,760
Investment securities available-for-sale	3,931,115	1,368,384
Loans held for sale	645	1,821
Loans held for investment, net	0	0
Derivative asset	12,053	2,103
Accrued interest receivable	0	0
Liabilities:
Deposit accounts	1,631,047	1,048,583
FHLB advances	31,564	517,291
Subordinated debentures	544,436	237,001
Derivative liability	12,066	2,103
Accrued interest payable	0	0
Level 3
Assets:
Cash and cash equivalents	0	0
Investments held-to-maturity	0	0
Investment securities available-for-sale	0	0
Loans held for sale	0	0
Loans held for investment, net	13,351,092	8,691,019
Derivative asset	1,914	0
Accrued interest receivable	0	0
Liabilities:
Deposit accounts	0	0
FHLB advances	0	0
Subordinated debentures	0	0
Derivative liability	0	0
Accrued interest payable	0	0
Carrying Amount
Assets:
Cash and cash equivalents	880,766	326,850
Investments held-to-maturity	23,732	37,838
Investment securities available-for-sale	3,931,115	1,368,384
Loans held for sale	601	1,672
Loans held for investment, net	13,236,433	8,722,311
Derivative asset	13,967	2,103
Accrued interest receivable	74,574	39,442
Liabilities:
Deposit accounts	16,214,177	8,898,509
FHLB advances	31,000	517,026
Subordinated debentures	501,511	215,145
Derivative liability	12,066	2,103
Accrued interest payable	6,569	2,686
Estimated Fair Value
Assets:
Cash and cash equivalents	880,766	326,850
Investments held-to-maturity	25,013	38,760
Investment securities available-for-sale	3,931,115	1,368,384
Loans held for sale	645	1,821
Loans held for investment, net	13,351,092	8,691,019
Derivative asset	13,967	2,103
Accrued interest receivable	74,574	39,442
Liabilities:
Deposit accounts	16,218,382	8,899,250
FHLB advances	31,564	517,291
Subordinated debentures	544,436	237,001
Derivative liability	12,066	2,103
Accrued interest payable	6,569	2,686
Bank Time Deposits | Level 1
Assets:
Cash and cash equivalents	2,845	2,708
Bank Time Deposits | Level 2
Assets:
Cash and cash equivalents	0	0
Bank Time Deposits | Level 3
Assets:
Cash and cash equivalents	0	0
Bank Time Deposits | Carrying Amount
Assets:
Cash and cash equivalents	2,845	2,708
Bank Time Deposits | Estimated Fair Value
Assets:
Cash and cash equivalents	$ 2,845	$ 2,708

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basic
Net income	$ 67,136	$ 66,566	$ (99,091)	$ 25,740	$ 41,098	$ 41,375	$ 38,527	$ 38,718	$ 60,351	$ 159,718	$ 123,340
Less: Dividends and earnings allocated to participating securities									(798)	(1,650)	0
Net income allocated to common stockholders									$ 59,553	$ 158,068	$ 123,340
Weighted average common shares outstanding (in shares)									79,209,560	60,339,714	53,963,047
Basic earnings per common share (in dollars per share)	$ 0.71	$ 0.71	$ (1.41)	$ 0.43	$ 0.69	$ 0.69	$ 0.62	$ 0.62	$ 0.75	$ 2.62	$ 2.29
Diluted
Net income allocated to common stockholders									$ 59,553	$ 158,068	$ 123,340
Weighted average common shares outstanding (in shares)									79,209,560	60,339,714	53,963,047
Diluted effect of share-based compensation (in shares)									287,513	352,567	650,010
Dilutive effect of stock warrants (in shares)									9,201	0	0
Weighted average diluted common shares (in shares)									79,506,274	60,692,281	54,613,057
Diluted earnings per common share (in dollars per share)	$ 0.71	$ 0.70	$ (1.41)	$ 0.43	$ 0.69	$ 0.69	$ 0.62	$ 0.62	$ 0.75	$ 2.60	$ 2.26
Restricted Stock Units RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of stock options excluded (in shares)										0	0
Stock option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of stock options excluded (in shares)									737	0

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative financial instruments included in gain (loss)	$ 452	$ 0	$ 0
Equity warrants | Other Income
Derivative [Line Items]
Derivative financial instruments included in gain (loss)	(42)	0	0
Other contracts | Other Income
Derivative [Line Items]
Derivative financial instruments included in gain (loss)	494	0	$ 0
Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative assets, notional	145,181	76,314
Derivative assets	13,967	2,103
Derivative liabilities, notional	145,181	76,314
Derivative liabilities	12,066	2,103
Not Designated as Hedging Instrument | Interest rate swap contracts
Derivative [Line Items]
Derivative assets, notional	145,181	76,314
Derivative assets	12,053	2,103
Derivative liabilities, notional	145,181	76,314
Derivative liabilities	12,066	$ 2,103
Not Designated as Hedging Instrument | Equity warrants
Derivative [Line Items]
Derivative assets, notional	0
Derivative assets	1,914
Derivative liabilities, notional	0
Derivative liabilities	$ 0

Balance Sheet Offsetting (Detai

Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Gross Amounts Recognized in the Consolidated Balance Sheets	$ 12,053	$ 2,103
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Net Amounts Presented in the Consolidated Balance Sheets	12,053	2,103
Financial Instruments	0	0
Cash Collateral	0	0
Net Amount	12,053	2,103
Financial liabilities:
Gross Amounts Recognized in the Consolidated Balance Sheets	12,066	2,107
Gross Amounts Offset in the Consolidated Balance Sheets	0	(4)
Net Amounts Presented in the Consolidated Balance Sheets	12,066	2,103
Financial Instruments	(6,140)	0
Cash Collateral	(5,926)	(1,678)
Net Amount	0	425
Not Designated as Hedging Instrument
Financial assets:
Gross Amounts Recognized in the Consolidated Balance Sheets	12,053	2,103
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Net Amounts Presented in the Consolidated Balance Sheets	12,053	2,103
Financial Instruments	0	0
Cash Collateral	0	0
Net Amount	12,053	2,103
Financial liabilities:
Gross Amounts Recognized in the Consolidated Balance Sheets	12,066	2,107
Gross Amounts Offset in the Consolidated Balance Sheets	0	(4)
Net Amounts Presented in the Consolidated Balance Sheets	12,066	2,103
Financial Instruments	(6,140)	0
Cash Collateral	(5,926)	(1,678)
Net Amount	$ 0	$ 425

Revenue Recognition - Summary o

Revenue Recognition - Summary of Company's Revenue Streams (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
NONINTEREST INCOME
Loan servicing income									$ 2,028	$ 1,840	$ 1,445
Earnings on bank-owned life insurance									7,160	3,486	3,427
Net gain from sales of loans									8,609	6,642	10,759
Net gain from sales of investment securities									13,882	8,571	1,399
Other income									12,201	4,486	3,641
Total noninterest income	$ 23,194	$ 26,758	$ 6,898	$ 14,475	$ 9,801	$ 11,430	$ 6,324	$ 7,681	71,325	35,236	31,027
Service charges on deposit accounts
NONINTEREST INCOME
Noninterest income									6,712	5,769	5,128
Other service fee income
NONINTEREST INCOME
Noninterest income									1,554	1,438	902
Debit card interchange income
NONINTEREST INCOME
Noninterest income									2,526	3,004	4,326
Trust custodial account fees
NONINTEREST INCOME
Noninterest income									16,653	0	0
Within Scope
NONINTEREST INCOME
Other income									3,090	1,015	1,242
Total noninterest income									30,535	11,226	11,598
Within Scope | Service charges on deposit accounts
NONINTEREST INCOME
Noninterest income									6,712	5,769	5,128
Within Scope | Other service fee income
NONINTEREST INCOME
Noninterest income									1,554	1,438	902
Within Scope | Debit card interchange income
NONINTEREST INCOME
Noninterest income									2,526	3,004	4,326
Within Scope | Trust custodial account fees
NONINTEREST INCOME
Noninterest income									16,653	0	0
Out-of-Scope
NONINTEREST INCOME
Loan servicing income									2,028	1,840	1,445
Earnings on bank-owned life insurance									7,160	3,486	3,427
Net gain from sales of loans									8,609	6,642	10,759
Net gain from sales of investment securities									13,882	8,571	1,399
Other income									9,111	3,471	2,399
Total noninterest income									$ 40,790	$ 24,010	$ 19,429

Revenue Recognition - Narrative

Revenue Recognition - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Revenue from Contract with Customer [Abstract]
Accrued fees receivable	$ 5.8
Escrow proceeds from property sales	$ 2.7

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jun. 01, 2020
Business Acquisition [Line Items]
Operating lease liability, statement of financial position [Extensible List]	us-gaap:AccruedLiabilitiesAndOtherLiabilities	us-gaap:AccruedLiabilitiesAndOtherLiabilities
Operating lease right-of-use asset, statement of financial position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Operating lease liabilities	$ 85,556	$ 46,498
Operating lease right-of-use assets	76,090	43,177
Rental income	$ 534	$ 142
Opus
Business Acquisition [Line Items]
Operating lease liabilities			$ 43,300
Operating lease right-of-use assets			42,400
Unfavorable lease liability adjustments			$ 900

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating leases	$ 18,065	$ 11,685
Short-term leases	2,031	2,369
Total lease expense	$ 20,096	$ 14,054

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance Sheet:
Operating lease right-of-use assets	$ 76,090	$ 43,177
Operating lease liabilities	85,556	46,498
Cash Flows:
Operating cash flows from operating leases	$ 16,528	$ 11,747

Leases - Schedule of Minimum Co

Leases - Schedule of Minimum Contractual Lease Payments and Other Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating leases
2021	$ 21,042	$ 10,138
2022	19,569	10,602
2023	18,361	10,137
2024	16,113	9,055
2025	10,991	7,318
Thereafter	13,009	7,265
Total	99,085	54,515
Short-term leases
2021	215	143
2022	0	7
2023	0	0
2024	0	0
2025	0	0
Thereafter	0	0
Total	215	150
Total contractual base rents
2021	21,257	10,281
2022	19,569	10,609
2023	18,361	10,137
2024	16,113	9,055
2025	10,991	7,318
Thereafter	13,009	7,265
Total	99,300	54,665
Total liability to make lease payments	85,556	46,498
Difference in undiscounted and discounted future lease payments	$ 13,744	$ 8,167
Weighted average discount rate	5.73%	6.13%
Weighted average remaining lease term (years)	5 years 3 months 18 days	5 years 4 months 24 days

Related Party Transactions (Det

Related Party Transactions (Details)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)director
Related Party Transaction [Line Items]
Number of former directors | director		2
Related party deposits	$ 60,000,000	$ 510,200,000
Associa
Related Party Transaction [Line Items]
Related party deposits		468,900,000
Management
Related Party Transaction [Line Items]
Related party loans outstanding	$ 0	$ 5,500,000

Quarterly Results of Operatio_3

Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 180,824	$ 181,991	$ 144,122	$ 123,789	$ 129,846	$ 132,604	$ 132,414	$ 131,243	$ 630,726	$ 526,107	$ 448,423
Interest expense	12,626	15,445	13,830	14,614	16,927	20,269	21,773	19,837	56,515	78,806	55,712
Provision for credit losses	1,517	4,210	160,635	25,454	2,297	1,562	334	1,526
Noninterest income	23,194	26,758	6,898	14,475	9,801	11,430	6,324	7,681	71,325	35,236	31,027
Noninterest expense	99,939	98,579	115,970	66,631	66,216	65,336	63,936	63,577	381,119	259,065	249,905
Income tax expense (benefit)	22,800	23,949	(40,324)	5,825	13,109	15,492	14,168	15,266	12,250	58,035	42,240
Net income	$ 67,136	$ 66,566	$ (99,091)	$ 25,740	$ 41,098	$ 41,375	$ 38,527	$ 38,718	$ 60,351	$ 159,718	$ 123,340
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.71	$ 0.71	$ (1.41)	$ 0.43	$ 0.69	$ 0.69	$ 0.62	$ 0.62	$ 0.75	$ 2.62	$ 2.29
Diluted (in dollars per share)	$ 0.71	$ 0.70	$ (1.41)	$ 0.43	$ 0.69	$ 0.69	$ 0.62	$ 0.62	$ 0.75	$ 2.60	$ 2.26

Parent Company Financial Info_3

Parent Company Financial Information - STATEMENTS OF FINANCIAL CONDITION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Information Disclosure [Abstract]
Percentage of capital stock of the Bank held	100.00%
Assets
Other assets	$ 292,861	$ 154,992
Total assets	19,736,544	11,776,012
Liabilities
Subordinated debentures	501,511	215,145
Accrued expenses and other liabilities	243,207	131,367
Total liabilities	16,989,895	9,763,418
Total stockholders’ equity	2,746,649	2,012,594	$ 1,969,697	$ 1,241,996
Total liabilities and stockholders’ equity	19,736,544	11,776,012
Corporation
Assets
Cash and cash equivalents	96,827	13,717
Investment in subsidiaries	3,017,285	2,217,903
Other assets	1,301	1,230
Total assets	3,115,413	2,232,850
Liabilities
Subordinated debentures	363,140	215,145
Accrued expenses and other liabilities	5,624	5,111
Total liabilities	368,764	220,256
Total stockholders’ equity	2,746,649	2,012,594
Total liabilities and stockholders’ equity	$ 3,115,413	$ 2,232,850

Parent Company Financial Info_4

Parent Company Financial Information - STATEMENTS OF OPERATIONS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Expense
Subordinated debentures									$ 20,647	$ 10,680	$ 6,716
Compensation and benefits									180,452	139,187	129,886
Noninterest expense	$ 99,939	$ 98,579	$ 115,970	$ 66,631	$ 66,216	$ 65,336	$ 63,936	$ 63,577	381,119	259,065	249,905
Net income before income taxes									72,601	217,753	165,580
Income tax expense	$ 22,800	$ 23,949	$ (40,324)	$ 5,825	$ 13,109	$ 15,492	$ 14,168	$ 15,266	12,250	58,035	42,240
Net income allocated to common stockholders									59,553	158,068	123,340
Corporation
Income
Dividend income from the Bank									29,874	54,118	0
Interest income									22	51	57
Total income									29,896	54,169	57
Expense
Subordinated debentures									16,596	10,680	6,716
Compensation and benefits									3,205	3,106	2,757
Noninterest expense									4,929	2,818	3,384
Total expense									24,730	16,604	12,857
Net income before income taxes									5,166	37,565	(12,800)
Income tax expense									(6,734)	(4,695)	(3,680)
Income (loss) before undistributed income of subsidiary									11,900	42,260	(9,120)
Equity in undistributed earnings of subsidiary									48,451	117,458	132,460
Net income allocated to common stockholders									$ 60,351	$ 159,718	$ 123,340

Parent Company Financial Info_5

Parent Company Financial Information - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 59,553	$ 158,068	$ 123,340
Adjustments to reconcile net income to cash used in operating activities:
Share-based compensation expense	10,859	10,528	9,033
Deferred income tax (benefit) expense	(42,622)	7,496	9,275
Change in accrued expenses and other liabilities, net	(9,455)	(6,265)	14,157
Net cash provided by (used in) operating activities	212,298	182,690	196,491
Cash flows from investing activities:
Change in cash acquired in acquisitions, net	937,100	0	146,571
Net cash provided by (used in) investing activities	570,483	(98,251)	(137,493)
Cash flows from financing activities:
Redemption of junior subordinated debt securities	0	(18,558)	0
Proceeds from issuance of subordinated debt, net	147,359	122,453	0
Cash dividends paid	(79,901)	(53,867)	0
Repurchase and retirement of common stock	0	(100,000)	0
Restricted stock surrendered and canceled	(1,653)	(3,285)	(1,669)
Net cash (used in) provided by financing activities	(228,865)	39,005	(52,756)
Net change in cash and cash equivalents	553,916	123,444	6,242
Cash and cash equivalents, beginning of year	326,850	203,406	197,164
Cash and cash equivalents, end of year	880,766	326,850	203,406
Corporation
Cash flows from operating activities:
Net income	60,351	159,718	123,340
Adjustments to reconcile net income to cash used in operating activities:
Share-based compensation expense	10,859	10,528	9,033
Equity in undistributed earnings of subsidiary and dividends from the bank	(48,451)	(117,458)	(132,460)
Deferred income tax (benefit) expense	188	42	65
Change in accrued expenses and other liabilities, net	1,149	3,131	(4,149)
Change in accrued interest receivable and other assets, net	(8,443)	(4,826)	2,461
Net cash provided by (used in) operating activities	15,653	51,135	(1,710)
Cash flows from investing activities:
Change in cash acquired in acquisitions, net	0	0	2,985
Other, net	0	0	(5,467)
Net cash provided by (used in) investing activities	0	0	(2,482)
Cash flows from financing activities:
Redemption of junior subordinated debt securities	0	(18,558)	0
Proceeds from issuance of subordinated debt, net	147,359	122,453	0
Cash dividends paid	(79,901)	(53,867)	0
Repurchase and retirement of common stock	0	(100,000)	0
Proceeds from exercise of options	1,652	2,679	1,924
Restricted stock surrendered and canceled	(1,653)	(3,285)	(1,669)
Net cash (used in) provided by financing activities	67,457	(50,578)	255
Net change in cash and cash equivalents	83,110	557	(3,937)
Cash and cash equivalents, beginning of year	13,717	13,160	17,097
Cash and cash equivalents, end of year	$ 96,827	$ 13,717	$ 13,160

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ / shares in Units, $ in Thousands	Jun. 01, 2020USD ($)office$ / sharesshares	May 29, 2020USD ($)$ / shares	Jul. 01, 2018USD ($)$ / sharesshares	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	May 31, 2020USD ($)client_account	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
Assets						$ 19,736,544	$ 11,776,012
Gross loans held for investment						13,236,433	8,722,311
Total deposits						16,214,177	8,898,509
Goodwill						898,569	808,322	$ 808,726			$ 493,329
Purchase accounting adjustments						(2,597)	(404)	2,354
ACL expense (reversal)						172,262	7,135	8,156
Initial ACL Recorded for PCD Loans						21,242
Goodwill acquired during the year						92,844	0	313,043
PENSCO
Business Acquisition [Line Items]
Custodial assets									$ 14,480,000
Number of client accounts | client_account									44,000
Opus
Business Acquisition [Line Items]
Equity issued, ratio	0.900
Stock transaction value (usd per share) | $ / shares	$ 19.31
Closing price for the Corporation's common stock (in dollars per share) | $ / shares		$ 21.62
Total merger consideration	$ 749,605	$ 749,605
Intangible assets	19,267
Goodwill	90,247
Purchase accounting adjustments				$ 2,600
Fair value of non-PCD loans	4,940,000
Aggregate fair value of PCD loans acquired	841,234
Contractual balance of non-PCD loans	5,050,000
Contractual balance of PCD loans	896,483
ACL expense (reversal)	75,900					75,900
Initial ACL Recorded for PCD Loans	21,200
Merger-related expense						$ 49,100
Total assets acquired	8,012,034
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits	6,915,990
Opus | Core Deposits
Business Acquisition [Line Items]
Intangible assets	16,100
Opus | Customer Relationships
Business Acquisition [Line Items]
Intangible assets	$ 3,200
Opus | Common Stock
Business Acquisition [Line Items]
Number of shares of common stock issued as consideration (in shares) | shares	34,407,403
Common stock issued issued for tax withholding (in shares) | shares	165,136
Vaue of equity interests issued and issuable		747,458
Opus | Equity warrants
Business Acquisition [Line Items]
Number of shares of common stock issued as consideration (in shares) | shares	406,778
Vaue of equity interests issued and issuable	$ 1,800
Opus | Equity Option
Business Acquisition [Line Items]
Number of shares of common stock issued as consideration (in shares) | shares	9,538
Vaue of equity interests issued and issuable	$ 46
Opus | Restricted Stock
Business Acquisition [Line Items]
Vaue of equity interests issued and issuable	328	$ 328
Opus | Opus
Business Acquisition [Line Items]
Assets	8,320,000
Gross loans held for investment	5,940,000
Total deposits	$ 6,910,000
Number of banking offices | office	46
Grandpoint Capital, Inc.
Business Acquisition [Line Items]
Equity issued, ratio			0.4750
Total merger consideration			$ 602,152
Intangible assets			71,943
Goodwill			312,639
Purchase accounting adjustments					$ 580		$ (404)
Total assets acquired			3,076,224							$ 3,050,000
Gross loans acquired										2,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits			2,506,929							$ 2,510,000
Aggregate cash paid for shares and consideration payable			$ 28,100
Closing stock price of common stock (in dollars per share) | $ / shares			$ 38.15
Goodwill acquired during the year			$ 312,600					$ 313,000
Grandpoint Capital, Inc. | Common Stock
Business Acquisition [Line Items]
Number of shares of common stock issued as consideration (in shares) | shares			15,758,089

Acquisitions - Total Transactio

Acquisitions - Total Transaction Consideration Value (Details) - Opus - USD ($) $ in Thousands	Jun. 01, 2020	May 29, 2020
Business Acquisition [Line Items]
Cash paid in lieu of fractional shares		$ 2
Total merger consideration	$ 749,605	749,605
Common Stock
Business Acquisition [Line Items]
Vaue of equity interests issued and issuable		747,458
Restricted Stock
Business Acquisition [Line Items]
Vaue of equity interests issued and issuable	$ 328	328
Options and Warrants
Business Acquisition [Line Items]
Vaue of equity interests issued and issuable		$ 1,817

Acquisitions - Assets Acquired

Acquisitions - Assets Acquired and Liabilities Assumed - (Details) - USD ($) $ in Thousands	Jun. 01, 2020	May 29, 2020	Jul. 01, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Goodwill				$ 898,569	$ 808,322	$ 808,726		$ 493,329
Opus
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 937,102
Interest bearing time deposits with financial institutions	137
Investment securities	829,891
Loans	5,809,451
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Allowance for Loan Losses	(21,242)
Fixed assets	22,121
Intangible assets/Core deposit intangible	19,267
Deferred tax assets	45,003
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	370,304
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total	8,012,034
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits	6,915,990
FHLB advances and other borrowings	213,491
Subordinated debt/Borrowings	138,653
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	84,542
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total	7,352,676
Total fair value of identifiable net assets	659,358
Total merger consideration	749,605	$ 749,605
Goodwill	$ 90,247
Grandpoint Capital, Inc.
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			$ 147,551
Investment securities			392,858
Loans			2,352,717
Fixed assets			9,122
Intangible assets/Core deposit intangible			71,943
Deferred tax assets			5,028
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			97,005
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total			3,076,224				$ 3,050,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits			2,506,929				$ 2,510,000
Subordinated debt/Borrowings			254,923
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			24,859
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total			2,786,711
Total fair value of identifiable net assets			289,513
Total merger consideration			602,152
Goodwill			$ 312,639

Acquisitions - Pro Forma Inform

Acquisitions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Combinations [Abstract]
Net interest and other income	$ 777,663	$ 778,924	$ 473,748
Net income	$ 67,579	$ 251,640	$ 133,565
Basic earnings per share (in dollars per share)	$ 0.74	$ 2.75	$ 2.16
Diluted earnings per share (in dollars per share)	$ 0.74	$ 2.72	$ 2.14

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Jan. 26, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 11, 2021
Subsequent Event [Line Items]
Cash dividend declared (in dollars per share)		$ 1.03	$ 0.88
Stock repurchase program, authorized amount		$ 150	$ 100
Subsequent Event
Subsequent Event [Line Items]
Cash dividend declared (in dollars per share)	$ 0.30
Stock repurchase program, shares authorized (in shares)				4,725,000
Stock repurchase program, percentage of common stock issued and outstanding				5.00%