Silvergate Capital (SICLQ) 10-Q 11 May 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	May 04, 2021
Cover [Abstract]
Amendment Flag	false
Document Fiscal Year Focus	2021
Entity Central Index Key	0001312109
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-39123
Entity Registrant Name	SILVERGATE CAPITAL CORPORATION
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	33-0227337
Entity Address, Address Line One	4250 Executive Square
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	La Jolla
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92037
City Area Code	858
Local Phone Number	362-6300
Title of 12(b) Security	Class A Common Stock, par value $0.01 per share
Trading Symbol	SI
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		25,337,473

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 16,422	$ 16,405
Interest earning deposits in other banks	4,315,100	2,945,682
Cash and cash equivalents	4,331,522	2,962,087
Trading securities	1,990	0
Securities available-for-sale, at fair value	1,717,418	939,015
Loans held-for-sale, at lower of cost or fair value	897,227	865,961
Loans held-for-investment, net of allowance for loan losses of $6,916 at March 31, 2021 and December 31, 2020	728,390	746,751
Federal home loan and federal reserve bank stock, at cost	14,851	14,851
Accrued interest receivable	9,432	8,698
Premises and equipment, net	1,758	2,072
Derivative assets	34,442	31,104
Other assets	20,122	15,696
Total assets	7,757,152	5,586,235
Deposits:
Noninterest bearing demand accounts	6,889,281	5,133,579
Interest bearing accounts	113,090	114,447
Total deposits	7,002,371	5,248,026
Subordinated debentures, net	15,834	15,831
Accrued expenses and other liabilities	25,326	28,079
Total liabilities	7,043,531	5,291,936
Commitments and contingencies
Preferred stock, $0.01 par value—authorized 10,000 shares; no shares issued or outstanding at March 31, 2021 and December 31, 2020	0	0
Additional paid-in capital	551,798	129,726
Retained earnings	131,058	118,348
Accumulated other comprehensive income	30,517	46,036
Total shareholders’ equity	713,621	294,299
Total liabilities and shareholders’ equity	7,757,152	5,586,235
Class A common stock, $0.01 par value—authorized 125,000 shares; 24,820 and 18,770 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively
Deposits:
Common stock	248	188
Class B non-voting common stock, $0.01 par value—authorized 25,000 shares; 0 and 64 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively
Deposits:
Common stock	$ 0	$ 1

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Allowance for loan losses	$ 6,916	$ 6,916
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock authorized (shares)	10,000,000	10,000,000
Preferred stock issued (shares)	0	0
Preferred stock outstanding (shares)	0	0
Class A common stock, $0.01 par value—authorized 125,000 shares; 24,820 and 18,770 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock authorized (shares)	125,000,000	125,000,000
Common stock issued (shares)	24,820,000	18,770,000
Common stock outstanding (shares)	24,820,000	18,770,000
Class B non-voting common stock, $0.01 par value—authorized 25,000 shares; 0 and 64 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock authorized (shares)	25,000,000	25,000,000
Common stock issued (shares)	0	64,000
Common stock outstanding (shares)	0	64,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income
Loans, including fees	$ 16,597	$ 13,121
Taxable securities	3,592	6,048
Tax-exempt securities	1,695	48
Other interest earning assets	1,279	724
Dividends and other	143	121
Total interest income	23,306	20,062
Interest expense
Deposits	46	4,051
Federal home loan bank advances	0	227
Subordinated debentures and other	245	306
Total interest expense	291	4,584
Net interest income before provision for loan losses	23,015	15,478
Provision for loan losses	0	367
Net interest income after provision for loan losses	23,015	15,111
Noninterest income
Mortgage warehouse fee income	954	382
Service fees related to off-balance sheet deposits	0	70
Deposit related fees	7,124	1,766
Gain on sale of securities, net	0	1,197
Gain on sale of loans, net	0	506
Gain on extinguishment of debt	0	925
Other income	12	85
Total noninterest income	8,090	4,931
Noninterest expense
Salaries and employee benefits	10,990	8,955
Occupancy and equipment	614	907
Communications and data processing	1,621	1,261
Professional services	1,717	985
Federal deposit insurance	2,296	123
Correspondent bank charges	497	373
Other loan expense	174	122
Other general and administrative	1,697	1,149
Total noninterest expense	19,606	13,875
Income before income taxes	11,499	6,167
Income tax (benefit) expense	(1,211)	1,774
Net income	$ 12,710	$ 4,393
Earnings per share:
Basic earnings per share (USD per share)	$ 0.56	$ 0.24
Diluted earnings per share (USD per share)	$ 0.55	$ 0.23
Weighted average shares outstanding:
Basic (shares)	22,504	18,668
Diluted (shares)	23,010	19,117

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 12,710	$ 4,393
Other comprehensive income (loss):
Change in net unrealized loss on available-for-sale securities	(13,434)	(9,313)
Less: Reclassification adjustment for net gain included in net income	0	(1,197)
Income tax effect	3,690	3,007
Unrealized loss on available-for-sale securities, net of tax	(9,744)	(7,503)
Change in net unrealized (loss) gain on derivative assets	(7,460)	23,466
Less: Reclassification adjustment for net gain included in net income	(504)	(171)
Income tax effect	2,189	(6,667)
Unrealized (loss) gain on derivative instruments, net of tax	(5,775)	16,628
Other comprehensive (loss) income	(15,519)	9,125
Total comprehensive (loss) income	$ (2,809)	$ 13,518

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common StockClass A Common Stock	Common StockClass B Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period (shares) at Dec. 31, 2019				17,775,160	892,836
Balance at beginning of period at Dec. 31, 2019	$ 231,036			$ 178	$ 9	$ 132,138	$ 92,310	$ 6,401
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss), net of tax	13,518						4,393	9,125
Conversion of Class B common stock to Class A common stock (shares)				596,000	(596,000)
Conversion of Class B common stock to Class A common stock	0			$ 6	$ (6)
Stock-based compensation	199					199
Exercise of stock options, net of shares withheld for employee taxes (shares)				134
Exercise of stock options, net of shares withheld for employee taxes	(1)					(1)
Balance at end of period (shares) at Mar. 31, 2020				18,371,294	296,836
Balance at end of period at Mar. 31, 2020	244,752			$ 184	$ 3	132,336	96,703	15,526
Balance at beginning of period (shares) at Dec. 31, 2020		18,770,000	64,000	18,769,771	64,197
Balance at beginning of period at Dec. 31, 2020	294,299			$ 188	$ 1	129,726	118,348	46,036
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss), net of tax	(2,809)						12,710	(15,519)
Net proceeds from stock issuance (shares)				5,860,858
Net proceeds from stock issuance	423,540			$ 58		423,482
Conversion of Class B common stock to Class A common stock (shares)				64,197	(64,197)
Conversion of Class B common stock to Class A common stock	0			$ 1	$ (1)
Stock-based compensation	$ 290					290
Exercise of stock options, net of shares withheld for employee taxes (shares)	159,122
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes (shares)				125,142
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes	$ (1,699)			$ 1		(1,700)
Balance at end of period (shares) at Mar. 31, 2021		24,820,000	0	24,819,968	0
Balance at end of period at Mar. 31, 2021	$ 713,621			$ 248	$ 0	$ 551,798	$ 131,058	$ 30,517

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income	$ 12,710	$ 4,393
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	644	830
Amortization of securities premiums and discounts, net	1,212	679
Amortization of loan premiums and discounts and deferred loan origination fees and costs, net	250	399
Stock-based compensation	290	199
Provision for loan losses	0	367
Originations/purchases of loans held-for-sale	(3,384,431)	(1,222,816)
Proceeds from sales of loans held-for-sale	3,353,164	1,153,515
Other gains, net	(1,141)	(2,885)
Other, net	891	576
Changes in operating assets and liabilities:
Accrued interest receivable and other assets	(4,119)	(520)
Accrued expenses and other liabilities	469	87
Net cash used in operating activities	(20,061)	(65,176)
Cash flows from investing activities
Purchases of securities available-for-sale	(817,734)	(98,986)
Proceeds from sale of securities available-for-sale	0	14,016
Proceeds from paydowns and maturities of securities available-for-sale	21,403	7,936
Loan originations/purchases and payments, net	18,112	(41,254)
Proceeds from sale of loans held-for-sale previously classified as held-for-investment	0	36,400
Purchase of federal home loan and federal reserve bank stock, net	0	(5)
Purchase of premises and equipment	(32)	(391)
(Payments for) proceeds from derivative contracts, net	(8,439)	13,370
Other, net	0	128
Net cash used in investing activities	(786,690)	(68,786)
Cash flows from financing activities
Net change in noninterest bearing deposits	1,755,702	401,552
Net change in interest bearing deposits	(1,357)	(213,250)
Net change in federal home loan bank advances	0	(18,075)
Payments made on notes payable	0	(3,714)
Proceeds from common stock issuance, net	423,540	0
Proceeds from stock option exercise	261	0
Taxes paid related to net share settlement of equity awards	(1,960)	(1)
Other, net	0	46
Net cash provided by financing activities	2,176,186	166,558
Net increase in cash and cash equivalents	1,369,435	32,596
Cash and cash equivalents, beginning of period	2,962,087	133,604
Cash and cash equivalents, end of period	4,331,522	166,200
Supplemental cash flow information:
Cash paid for interest	444	4,928
Income taxes paid (refunded), net	(6)	(22)
Supplemental noncash disclosures:
Loans held-for-investment transferred to loans held-for-sale	0	30,792
Loans held-for-sale transferred to loans held-for-investment	0	5,098
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 71	$ 0

Nature of Business and Summary

Nature of Business and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Nature of Business and Summary of Significant Accounting Policies	Nature of Business and Summary of Significant Accounting Policies Nature of Business The accompanying consolidated financial statements include the accounts of Silvergate Capital Corporation, a Maryland corporation and its wholly-owned subsidiary, Silvergate Bank (the “Bank”), collectively referred to as (the “Company” or “Silvergate”). The Company’s assets consist primarily of its investment in the Bank and its primary activities are conducted through the Bank. The Bank was incorporated in 1987 and commenced business in 1988 under the California Financial Code as an industrial bank. In February 2009 the Bank converted its charter to a California commercial bank, which gave it the added authority to accept demand deposits. The Company is a registered bank holding company that is subject to supervision by the Board of Governors of the Federal Reserve (“Federal Reserve”). The Bank is subject to regulation by the California Department of Financial Protection and Innovation, Division of Financial Institutions (“DFPI”), and, as a Federal Reserve member bank since 2012, the Federal Reserve Bank of San Francisco (“FRB”). The Bank’s deposits are insured up to legal limits by the Federal Deposit Insurance Corporation (“FDIC”). On January 26, 2021, the Company completed its underwritten public offering of 4,563,493 shares of Class A common stock at a price of $63.00 per share, including 595,238 shares of Class A common stock upon the exercise in full by the underwriters of their option to purchase additional shares. The aggregate gross proceeds of the offering were approximately $287.5 million and net proceeds to the Company were $272.4 million after deducting underwriting discounts and offering expenses. On March 9, 2021, the Company entered into an equity distribution agreement pursuant to which the Company may issue and sell, from time to time, up to an aggregate gross sales price of $300.0 million of the Company’s shares of Class A common stock through an “at-the-market” offering program, or ATM Program. As of March 31, 2021, the Company had sold 1,297,365 shares of Class A common stock at an average price of $118.39 under the ATM Program. The transactions resulted in gross proceeds of $153.6 million and net proceeds to the Company of $151.1 million after deducting commissions and expenses. Financial Statement Preparation and Presentation The accompanying interim consolidated financial statements have been prepared by the Company, without an audit, in accordance with the instructions to the Quarterly Report on Form 10-Q, and Rule 10-01 of Regulation S-X promulgated by the United States Securities and Exchange Commission (the “SEC”) and, therefore, do not include all information and footnotes necessary for a fair presentation of its consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”). In the opinion of management, the unaudited financial information for the interim periods presented reflects all adjustments, consisting of only normal and recurring adjustments, necessary for a fair statement of the Company’s consolidated financial statements. These consolidated statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2020, included in the Company’s Annual Report on Form 10-K dated March 8, 2021. Operating results for interim periods are not necessarily indicative of operating results for an entire fiscal year. The consolidated financial statements include the accounts of the Company and all other entities in which it has a controlling financial interest. All significant intercompany accounts and transactions have been eliminated in consolidation. Unless the context requires otherwise, all references to the Company include its wholly owned subsidiaries. The accounting and reporting policies of the Company are based upon GAAP and conform to predominant practices within the financial services industry. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts and the disclosure of contingent amounts in the Company’s financial statements and the accompanying notes. We evaluate estimates on an ongoing basis including the economic impact of Coronavirus Disease 2019 (or “COVID-19”). Actual results could materially differ from those estimates. Recently issued accounting pronouncements not yet effective In June 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (or “ASU”) 2016-13, Financial Instruments-Credit Losses (Topic 326) to replace the incurred loss model with an expected loss model, which is referred to as the current expected credit loss (or “CECL”) model. The CECL model is applicable to the measurement of credit losses on financial assets measured at amortized cost, including loan receivables, held to maturity debt securities, and reinsurance receivables. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor. These amendments were initially effective for fiscal years beginning after December 15, 2019 for SEC registrants and after December 15, 2020, for Public Business Entities, or PBEs. In November 2019, the FASB issued ASU 2019-10, Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842): Effective Dates, which finalized the delay of the effective date for smaller reporting companies, such as the Company to apply the standards related to CECL, until fiscal years beginning after December 15, 2022. For debt securities with other than temporary impairment (OTTI), the guidance will be applied prospectively and for existing purchased credit impaired (PCI) assets will be grandfathered and classified as purchased credit deteriorated (PCD) assets at the date of adoption. The asset will be grossed up for the allowance for expected credit losses for all PCD assets at the date of adoption and will continue to recognize the noncredit discount in interest income based on the yield such assets as of the adoption date. Subsequent changes in expected credit losses will be recorded through the allowance. For all other assets with the scope of CECL, the cumulative effect adjustment will be recognized in retained earnings as of the beginning of the first reporting period in which the guidance is effective. In November 2018, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, which clarify that receivables arising from operating leases are not within the scope of Subtopic 326-20. Instead, impairment of receivables arising from operating leases should be accounted for in accordance with Topic 842, Leases. The Company formed a CECL implementation committee in 2018 which prepared a project plan to migrate towards the adoption date. As part of the project plan, the Company contracted a third-party vendor to assist in the application and analysis of ASU 2016-13 as well as a third party vendor to perform an independent model validation. As part of this process, the Company has determined preliminary loan pool segmentation under CECL, as well as evaluated the key economic loss drivers for each segment. The Company operationalized an initial CECL model during the second quarter of 2019 and is running this preliminary CECL model alongside the existing incurred loss methodology. The Company intends to continue to refine and run the model until the expected adoption date on January 1, 2023. The Company continues to evaluate the effects of ASU 2016-13 on its financial statements and disclosures. 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 (or “ASU 2020-04”), which provides temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from the London Interbank Offered Rate (or “LIBOR”) or other interbank offered rate (reference rates) on financial reporting. In the fourth quarter of 2020 the Office of the Comptroller of the Currency, amongst others, announced that the overnight and one, three, six and twelve month USD LIBOR will be discontinued on June 30, 2023. It was originally expected that LIBOR would be discontinued by the end of 2021. To help with the transition to new reference rates, the ASU provides optional expedients and exceptions for applying GAAP to affected contract modifications and hedge accounting relationships. The guidance is applicable only to contracts or hedge accounting relationships that reference LIBOR or another reference rate expected to be discontinued. The expedients and exceptions in this update are available to all entities starting March 12, 2020 through December 31, 2022. In January 2020, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848), which clarifies the scope of Topic 848 to include derivative instruments impacted by discounting transition. The Company has created a subcommittee of the Asset Liability Management Committee to address the LIBOR transition and phase-out issues. The Company has identified its LIBOR-based contracts that will be impacted by the transition away from of LIBOR, and is incorporating fallback language in negotiated contracts and incorporating non-LIBOR reference rate and/or fallback language in new contracts to prepare for these changes. The Company is evaluating the impact that ASU 2020-04 will have on those financial assets where LIBOR is used as an index rate.

Securities

Securities	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities	Securities Trading The Company engages in trading activities for its own account. Securities that are held principally for resale in the near term are recorded at fair value with changes in fair value included in earnings. Trading securities consists of U.S. Treasury Bills which had a fair value of $2.0 million at March 31, 2021. The carrying values of trading securities included an immaterial amount of net unrealized losses at March 31, 2021. Available-for-sale The fair value of available-for-sale securities and their related gross unrealized gains and losses at the dates indicated are as follows: Available-for-sale securities Amortized Cost Gross Gross Fair Value (Dollars in thousands) March 31, 2021 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 152,253 $ 167 $ (1,202) $ 151,218 Government agency collateralized mortgage obligation 686,030 194 (2,844) 683,380 Private-label collateralized mortgage obligation 18,688 530 (170) 19,048 Commercial mortgage-backed securities: Government agency mortgage-backed securities 49,135 2 (24) 49,113 Government agency collateralized mortgage obligation 42,435 — (35) 42,400 Private-label collateralized mortgage obligation 163,993 10,504 — 174,497 Municipal bonds: Tax-exempt 318,132 18,801 (13) 336,920 Taxable 14,206 1,485 (48) 15,643 Asset backed securities: Government sponsored student loan pools 245,716 298 (815) 245,199 $ 1,690,588 $ 31,981 $ (5,151) $ 1,717,418 Available-for-sale securities Amortized Cost Gross Gross Fair Value (Dollars in thousands) December 31, 2020 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 5,701 $ 18 $ (55) $ 5,664 Government agency collateralized mortgage obligation 197,978 371 (298) 198,051 Private-label collateralized mortgage obligation 20,544 399 (256) 20,687 Commercial mortgage-backed securities: Private-label collateralized mortgage obligation 164,214 18,322 — 182,536 Municipal bonds: Tax-exempt 246,159 24,200 — 270,359 Taxable 15,307 695 — 16,002 Asset backed securities: Government sponsored student loan pools 248,848 17 (3,149) 245,716 $ 898,751 $ 44,022 $ (3,758) $ 939,015 There were no investment securities pledged for borrowings or for other purposes as required or permitted by law as of March 31, 2021 and December 31, 2020. At March 31, 2021, 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. Securities with unrealized losses as of the dates indicated, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows: Available-for-sale securities Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized (Dollars in thousands) March 31, 2021 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 102,614 $ (1,202) $ — $ — $ 102,614 $ (1,202) Government agency collateralized mortgage obligation 478,392 (2,699) 52,294 (145) 530,686 (2,844) Private-label collateralized mortgage obligation — — 8,609 (170) 8,609 (170) Commercial mortgage-backed securities: Government agency mortgage-backed securities 18,203 (24) — — 18,203 (24) Government agency collateralized mortgage obligation 30,900 (35) — — 30,900 (35) Municipal bonds: Tax-exempt 23,800 (13) — — 23,800 (13) Taxable 5,767 (48) — — 5,767 (48) Asset backed securities: Government sponsored student loan pools 44,065 (80) 120,704 (735) 164,769 (815) $ 703,741 $ (4,101) $ 181,607 $ (1,050) $ 885,348 $ (5,151) Available-for-sale securities Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized (Dollars in thousands) December 31, 2020 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 5,165 $ (55) $ — $ — $ 5,165 $ (55) Government agency collateralized mortgage obligation 120,912 (172) 56,976 (126) 177,888 (298) Private-label collateralized mortgage obligation 290 (7) 9,950 (249) 10,240 (256) Asset backed securities: Government sponsored student loan pools — — 240,825 (3,149) 240,825 (3,149) $ 126,367 $ (234) $ 307,751 $ (3,524) $ 434,118 $ (3,758) As indicated in the tables above, as of March 31, 2021, the Company’s investment securities had gross unrealized losses totaling approximately $5.2 million, compared to approximately $3.8 million at December 31, 2020. The Company analyzes all of its securities with an unrealized loss position. For each security, the Company analyzed the credit quality and performed a projected cash flow analysis. In analyzing the credit quality, management may consider whether the securities are issued by the federal government, its agencies or its sponsored entities, or non-governmental entities, whether downgrades by bond rating agencies have occurred, and if credit quality has deteriorated. When performing a cash flow analysis, the Company uses models that project prepayments, default rates, and loss severities on the collateral supporting the security, based on underlying loan level borrower and loan characteristics and interest rate assumptions. The unrealized losses on government sponsored student loan pools are due primarily to increased credit spreads since purchase. The Company believes it has an adequate amount of credit enhancement and government assurance to cover any expected losses at this time. Based on these analyses and reviews conducted by the Company, and assisted by independent third parties, the Company determined that none of its securities required an other-than-temporary impairment charge at March 31, 2021. Management continues to expect to recover the adjusted amortized cost basis of these bonds. As of March 31, 2021, the Company had 51 securities whose estimated fair value declined 0.58% from the Company’s amortized cost; at December 31, 2020, the Company had 30 securities whose estimated fair value declined 0.86% from the Company’s amortized cost. The Company’s securities that have unrealized losses are due to widened credit spreads and changes in market interest rates since their purchase dates. Current unrealized losses are expected to recover as the securities approach their respective maturity dates. Management believes it will more than likely not be required to sell before recovery of the amortized cost basis. There were no sales or calls of available-for-sale securities for the three months ended March 31, 2021. For the three months ended March 31, 2020 the Company received $14.0 million in proceeds and recognized a $1.2 million gain and no loss on sales and calls of securities. There were no credit losses associated with our securities portfolio recognized in earnings for the three months ended March 31, 2021 and 2020. The amortized cost and estimated fair value of investment securities as of the periods presented by contractual maturity are shown below. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. For purposes of the following table, the entire outstanding balance of residential and commercial mortgage-backed securities is categorized based on the final maturity date. March 31, December 31, Amortized Fair Amortized Fair (Dollars in thousands) Available-for-sale securities Within one year $ — $ — $ — $ — After one year through five years — — — — After five years through ten years 56,363 57,091 14,021 15,694 After ten years 1,634,225 1,660,327 884,730 923,321 Total $ 1,690,588 $ 1,717,418 $ 898,751 $ 939,015

Loans

Loans	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans	Loans The following disclosure reports the Company’s loan portfolio segments and classes. Segments are groupings of similar loans at a level in which the Company has adopted systematic methods of documentation for determining its allowance for loan and credit losses. Classes are a disaggregation of the portfolio segments. The Company’s loan portfolio segments are: Real estate. Real estate loans includes loans for which the Company holds one-to-four family, multi-family, commercial and construction real property as collateral. Commercial real estate lending activity is typically restricted to owner-occupied properties or to investor properties that are owned by customers with a current banking relationship. The primary risks of real estate mortgage 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 mortgage loan unprofitable. Real estate loans also may be adversely affected by conditions in the real estate markets or in the general economy. Commercial and industrial . Commercial and industrial loans consist of loans and lines of credit to businesses that are generally collateralized by accounts receivable, inventory, equipment, loan and lease receivables, digital currency assets such as bitcoin and other commercial assets, and may be supported by other credit enhancements such as personal guarantees. Risks may arise from differences between expected and actual cash flows and/or liquidity levels of the borrowers, as well as the type of collateral securing these loans and the reliability of the conversion thereof to cash. Currently, commercial and industrial loans consist primarily of asset based loans. In January 2020, the Company began offering a new lending product called SEN Leverage, which allows Silvergate customers to obtain U.S. dollar loans collateralized by bitcoin held at select digital currency exchanges and other custodians that are also customers of the Bank. The outstanding balance of SEN Leverage loans was $117.3 million and $77.2 million at March 31, 2021 and December 31, 2020, respectively. Reverse mortgage and other. From 2012 to 2014, the Company purchased home equity conversion mortgage (“HECM”) loans (also known as reverse mortgage loans) which are a special type of home loan, for homeowners aged 62 years or older, that requires no monthly mortgage payments and allows the borrower to receive payments from the lender. Reverse mortgage loan insurance is provided by the U.S. Federal Housing Administration through the HECM program which protects lenders from losses due to non-repayment of the loans when the outstanding loan balance exceeds collateral value at the time the loan is required to be repaid. Other loans consist of consumer loans and loans secured by personal property. Mortgage warehouse. The Company’s mortgage warehouse lending division provides short-term interim funding for single-family residential mortgage loans originated by mortgage bankers or other lenders pending the sale of such loans in the secondary market. The Company’s risk is mitigated by comprehensive policies, procedures, and controls governing this activity, partial loan funding by the originating lender, guaranties or additional monies pledged to the Company as security, and the short holding period of funded loans on the Company’s balance sheet. In addition, the loss rates of this portfolio have historically been minimal, and these loans are all subject to written purchase commitments from takeout investors or are hedged. The Company’s mortgage warehouse loans may either be held-for-investment or held-for-sale depending on the underlying contract. The Company sold approximately $0.8 million and $21.7 million of loans to participants during the three months ended March 31, 2021 and 2020, respectively. At March 31, 2021 and December 31, 2020, gross mortgage warehouse loans were approximately $973.2 million and $963.9 million, respectively. A summary of loans as of the periods presented are as follows: March 31, December 31, (Dollars in thousands) Real estate loans: One-to-four family $ 171,045 $ 187,855 Multi-family 74,003 77,126 Commercial 287,411 301,901 Construction 5,172 6,272 Commercial and industrial 118,598 78,909 Reverse mortgage and other 1,346 1,495 Mortgage warehouse 76,014 97,903 Total gross loans held-for-investment 733,589 751,461 Deferred fees, net 1,717 2,206 Total loans held-for-investment 735,306 753,667 Allowance for loan losses (6,916) (6,916) Total loans held-for-investment, net $ 728,390 $ 746,751 Total loans held-for-sale (1) $ 897,227 $ 865,961 ________________________ (1) Loans held-for-sale are comprised entirely of mortgage warehouse loans for all periods presented. At March 31, 2021 and December 31, 2020, approximately $539.0 million and $574.5 million, respectively, of the Company’s loan portfolio was collateralized by various forms of real estate. A significant percentage of such loans are collateralized by properties located in California (64.7% and 68.8% as of March 31, 2021 and December 31, 2020, respectively) and Arizona (4.4% and 5.9% as of March 31, 2021 and December 31, 2020, respectively) with no other state greater than 5%. The Company attempts to address and mitigate concentrations of credit risk by making loans that are diversified by collateral type, placing limits on the amounts of various categories of loans relative to total Company capital, and conducting quarterly reviews of its portfolio by collateral type, geography, and other characteristics. While management believes that the collateral presently securing its portfolio and the recorded allowance for loan losses are adequate to absorb potential losses, there can be no assurances that significant deterioration in the California and Arizona real estate markets would not expose the Company to significantly greater credit risk. Recorded investment in loans excludes accrued interest receivable, loan origination fees, net and unamortized premium or discount, net due to immateriality. Accrued interest on loans held-for-investment totaled approximately $3.1 million and $2.7 million and deferred fees totaled approximately $1.7 million and $2.2 million at March 31, 2021 and December 31, 2020, respectively. Allowance for Loan Losses At March 31, 2021, the Company’s total allowance for loan losses remained flat at $6.9 million, compared to December 31, 2020. The overall level of the allowance was based on Silvergate’s historically strong credit quality and minimal loan charge-offs, and the loan-to-value ratios in the low- to mid-50% range, based on last required appraisal value, in the Company's commercial, multi-family and one-to-four family real estate loans as of March 31, 2021. In addition, during the three months ended March 31, 2021, the Company updated the allowance for loan loss model to remove no longer relevant historical loss data for the commercial and industrial loan segment, reflecting the growth of digital collateralized loans that are now the majority of the loan segment balance. In addition, the Company added a COVID-19 loan modification qualitative factor adjustment to the commercial and one-to-four family real estate loan segments to recognize the modifications granted over the previous twelve months and additional risks of default in these loan segments. The following tables present the allocation of the allowance for loan losses, as well as the activity in the allowance by loan class, and recorded investment in loans held-for-investment as of and for the periods presented: Three Months Ended March 31, 2021 One-to Multi- Commercial Construction Commercial Reverse Mortgage Total (Dollars in thousands) Balance, December 31, 2020 $ 1,245 $ 878 $ 1,810 $ 590 $ 1,931 $ 39 $ 423 $ 6,916 Charge-offs — — — — — — — — Recoveries — — — — — — — — Provision for loan losses 389 (50) 1,441 (97) (1,571) (21) (91) — Balance, March 31, 2021 $ 1,634 $ 828 $ 3,251 $ 493 $ 360 $ 18 $ 332 $ 6,916 Three Months Ended March 31, 2020 One-to Multi- Commercial Construction Commercial and Reverse Mortgage Total (Dollars in thousands) Balance, December 31, 2019 $ 2,051 $ 653 $ 2,791 $ 96 $ 312 $ 38 $ 250 $ 6,191 Charge-offs — — — — — — — — Recoveries — — — — — — — — Provision for loan losses (80) 36 166 162 114 1 (32) 367 Balance, March 31, 2020 $ 1,971 $ 689 $ 2,957 $ 258 $ 426 $ 39 $ 218 $ 6,558 March 31, 2021 One-to Multi- Commercial Construction Commercial Reverse Mortgage Total (Dollars in thousands) Amount of allowance attributed to: Specifically evaluated impaired loans $ 12 $ — $ — $ — $ — $ 7 $ — $ 19 General portfolio allocation 1,622 828 3,251 493 360 11 332 6,897 Total allowance for loan losses $ 1,634 $ 828 $ 3,251 $ 493 $ 360 $ 18 $ 332 $ 6,916 Loans evaluated for impairment: Specifically evaluated $ 5,141 $ — $ 9,830 $ — $ 237 $ 876 $ — $ 16,084 Collectively evaluated 165,904 74,003 277,581 5,172 118,361 470 76,014 717,505 Total gross loans held-for-investment $ 171,045 $ 74,003 $ 287,411 $ 5,172 $ 118,598 $ 1,346 $ 76,014 $ 733,589 December 31, 2020 One-to Multi- Commercial Construction Commercial Reverse Mortgage Total (Dollars in thousands) Amount of allowance attributed to: Specifically evaluated impaired loans $ 11 $ — $ — $ — $ — $ 29 $ — $ 40 General portfolio allocation 1,234 878 1,810 590 1,931 10 423 6,876 Total allowance for loan losses $ 1,245 $ 878 $ 1,810 $ 590 $ 1,931 $ 39 $ 423 $ 6,916 Loans evaluated for impairment: Specifically evaluated $ 5,780 $ — $ 9,722 $ — $ 274 $ 869 $ — $ 16,645 Collectively evaluated 182,075 77,126 292,179 6,272 78,635 626 97,903 734,816 Total gross loans held-for-investment $ 187,855 $ 77,126 $ 301,901 $ 6,272 $ 78,909 $ 1,495 $ 97,903 $ 751,461 Impaired Loans The following tables provide a summary of the Company’s investment in impaired loans as of and for the periods presented: March 31, 2021 Unpaid Recorded Related (Dollars in thousands) With no related allowance recorded: Real estate loans: One-to-four family $ 5,742 $ 5,077 $ — Commercial 9,830 9,830 — Commercial and industrial 237 237 — Reverse mortgage and other 801 800 — 16,610 15,944 — With an allowance recorded: Real estate loans: One-to-four family 64 64 12 Reverse mortgage and other 76 76 7 140 140 19 Total impaired loans $ 16,750 $ 16,084 $ 19 December 31, 2020 Unpaid Recorded Related (Dollars in thousands) With no related allowance recorded: Real estate loans: One-to-four family $ 6,432 $ 5,716 $ — Commercial 9,723 9,722 — Commercial and industrial 274 274 — Reverse mortgage and other 523 523 — 16,952 16,235 — With an allowance recorded: Real estate loans: One-to-four family 64 64 11 Reverse mortgage and other 346 346 29 410 410 40 Total impaired loans $ 17,362 $ 16,645 $ 40 Three Months Ended March 31, 2021 2020 Average Interest Average Interest (Dollars in thousands) With no related allowance recorded: Real estate loans: One-to-four family $ 4,979 $ 77 $ 3,731 $ 26 Commercial 9,795 128 1,941 21 Commercial and industrial 249 5 2,329 42 Reverse mortgage and other 616 — 511 — 15,639 210 8,512 89 With an allowance recorded: Real estate loans: One-to-four family 64 1 66 1 Reverse mortgage and other 258 — 338 — 322 1 404 1 Total impaired loans $ 15,961 $ 211 $ 8,916 $ 90 For purposes of this disclosure, the unpaid principal balance is not reduced for partial charge-offs. Cash basis interest income is not materially different than interest income recognized. Nonaccrual and Past Due Loans Nonperforming loans include individually evaluated impaired loans, loans for which the accrual of interest has been discontinued and loans 90 days or more past due and still accruing interest. The following tables present by loan class the aging analysis based on contractual terms, nonaccrual loans, and the Company’s recorded investment in loans held-for-investment as of the periods presented: March 31, 2021 30-59 60-89 Greater Total Current Total Nonaccruing Loans (Dollars in thousands) Real estate loans: One-to-four family $ 2,773 $ 2,187 $ 2,834 $ 7,794 $ 163,251 $ 171,045 $ 4,457 $ — Multi-family — — — — 74,003 74,003 — — Commercial — — — — 287,411 287,411 — — Construction — — — — 5,172 5,172 — — Commercial and industrial — — — — 118,598 118,598 — — Reverse mortgage and other — — — — 1,346 1,346 876 — Mortgage warehouse — — — — 76,014 76,014 — — Total gross loans held-for-investment $ 2,773 $ 2,187 $ 2,834 $ 7,794 $ 725,795 $ 733,589 $ 5,333 $ — December 31, 2020 30-59 60-89 Greater Total Current Total Nonaccruing Loans (Dollars in thousands) Real estate loans: One-to-four family $ 992 $ 85 $ 3,820 $ 4,897 $ 182,958 $ 187,855 $ 4,113 $ — Multi-family 206 — — 206 76,920 77,126 — — Commercial — — — — 301,901 301,901 — — Construction — — — — 6,272 6,272 — — Commercial and industrial — — — — 78,909 78,909 — — Reverse mortgage and other — — — — 1,495 1,495 869 — Mortgage warehouse — — — — 97,903 97,903 — — Total gross loans held-for-investment $ 1,198 $ 85 $ 3,820 $ 5,103 $ 746,358 $ 751,461 $ 4,982 $ — Troubled Debt Restructurings A loan is identified as a troubled debt restructuring (“TDR”) when a borrower is experiencing financial difficulties and, for economic or legal reasons related to these difficulties, the Company grants a concession to the borrower in the restructuring that it would not otherwise consider. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. The Company has granted a concession when, as a result of the restructuring, it does not expect to collect all amounts due or within the time periods originally due under the original contract, including one or a combination of the following: a reduction of the stated interest rate of the loan; an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk; or a temporary forbearance with regard to the payment of principal or interest. All troubled debt restructurings are reviewed for potential impairment. Generally, a nonaccrual loan that is restructured remains on nonaccrual status for a minimum period of six months to demonstrate that the borrower can perform under the restructured terms. If the borrower’s performance under the new terms is not reasonably assured, the loan remains classified as a nonaccrual loan. Loans classified as TDRs are reported as impaired loans. As of March 31, 2021 and December 31, 2020, the Company had a recorded investment in TDRs of $1.5 million and $1.5 million, respectively. The Company has allocated $11,000 of specific allowance for those loans at March 31, 2021 and $11,000 December 31, 2020. The Company has not committed to lend additional amounts to these TDRs. No loans were modified as TDRs during the three months ended March 31, 2021 or 2020. A loan is considered to be in payment default once it is 30 days contractually past due under the modified terms. There were no loans modified as TDRs for which there was a payment default within twelve months during the three months ended March 31, 2021 or 2020. There was no provision for loan loss or charge-offs for TDR’s that subsequently defaulted during the three months ended March 31, 2021 or 2020. COVID-19 Related Modifications In March 2020, Section 4013 of the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) addressed COVID-19 related modifications and specified that such modifications made on loans that were current as of December 31, 2019 are not TDRs. In December 2020, CARES Act was extended to allow eligible loan modifications until the earlier of January 1, 2022 or the date that is 60 days after the termination date of the national emergency. In accordance with interagency guidance issued in April 2020, short-term modifications made to a borrower affected by the COVID-19 pandemic and governmental shutdown orders, such as payment deferrals, fee waivers and extensions of repayment terms, do not need to be identified as TDRs if the loans were current at the time a modification plan was implemented. The Company elected to adopt the provisions of the CARES Act for modifications that meet the requirements described above. In April 2020, the Company implemented a short-term loan modification program for customers impacted financially by the COVID-19 pandemic to provide temporary relief to certain borrowers who meet the program’s qualifications. The program was offered to borrowers to modify their existing loans to temporarily defer principal and/or interest payments for a specified period of time, extend loan maturity dates and/or waive certain loan covenants. Deferred payments may be extended for continued hardship, on a case by case basis, where COVID-19 related issues continue to persist. Due to the fluid nature of COVID-19, this program has been evolving in order to provide maximum relief to bank borrowers. The majority of short-term loan modifications for commercial real estate loan borrowers consist of deferred payments which may include principal, interest and escrow. Deferred interest is capitalized to the loan balance and deferred principal is added to the maturity or payoff date. For one-to-four family residential real estate loans, the majority of short-term modifications consist of deferring full monthly payment of principal, interest and escrow, with deferred payments due at maturity or payoff of the loan. Loans qualifying for these modifications are not required to be reported as a TDR, delinquent, nonaccrual, impaired or criticized solely as a result of a COVID-19 loan modification for the months of payment deferrals. Borrowers considered current are those that are less than 30 days past due on their modified contractual payments. None of the modified loans met the criteria of a TDR under the CARES Act or the related interagency statement. As of March 31, 2021, loans representing $65.3 million in loan balances, or 8.9% of total gross loans held-for-investment, with the majority of the balance consisting of $40.0 million of commercial real estate loans in the hospitality sector, were still under modification, deferring a portion or all of the contractual payments. Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, collateral adequacy, credit documentation, and current economic trends, among other factors. This analysis typically includes larger, nonhomogeneous loans such as commercial real estate and commercial and industrial loans. This analysis is performed on an ongoing basis as new information is obtained. The Company uses the following definitions for risk ratings: Pass : Loans in all classes that are not adversely rated, are contractually current as to principal and interest, and are otherwise in compliance with the contractual terms of the loan agreement. Management believes that there is a low likelihood of loss related to those loans that are considered pass. Special mention : Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. Substandard : Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful : Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, 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 : Credits rated as loss are charged-off. Management has no expectation of the recovery of any payments in respect of credits rated as loss. The following tables present by portfolio class the Company’s internal risk grading system as well as certain other information concerning the credit quality of the Company’s recorded investment in loans held-for-investment as of the periods presented. No assets were classified as loss or doubtful during the periods presented. Credit Risk Grades Pass Special Mention Substandard Doubtful Total (Dollars in thousands) March 31, 2021 Real estate loans: One-to-four family $ 163,313 $ 3,275 $ 4,457 $ — $ 171,045 Multi-family 74,003 — — — 74,003 Commercial 265,135 14,402 7,874 — 287,411 Construction 5,172 — — — 5,172 Commercial and industrial 118,361 — 237 — 118,598 Reverse mortgage and other 470 — 876 — 1,346 Mortgage warehouse 76,014 — — — 76,014 Total gross loans held-for-investment $ 702,468 $ 17,677 $ 13,444 $ — $ 733,589 Credit Risk Grades Pass Special Mention Substandard Doubtful Total (Dollars in thousands) December 31, 2020 Real estate loans: One-to-four family $ 180,458 $ 3,284 $ 4,113 $ — $ 187,855 Multi-family 77,126 — — — 77,126 Commercial 288,309 5,825 7,767 — 301,901 Construction 6,272 — — — 6,272 Commercial and industrial 78,635 — 274 — 78,909 Reverse mortgage and other 626 — 869 — 1,495 Mortgage warehouse 97,903 — — — 97,903 Total gross loans held-for-investment $ 729,329 $ 9,109 $ 13,023 $ — $ 751,461 Related Party Loans The Company had related party loans with an outstanding balance of $5.5 million and $5.0 million as of March 31, 2021 and December 31, 2020, respectively. During the three months ended March 31, 2021, the Company advanced $2.0 million of related party loans and received $1.5 million in principal payments.

FHLB Advances and Other Borrowi

FHLB Advances and Other Borrowings	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
FHLB Advances and Other Borrowings	FHLB Advances and Other Borrowings Federal Home Loan Bank (“FHLB”) Advances The following table sets forth certain information on our FHLB advances during the period presented: Three Months Ended Year Ended (Dollars in thousands) Amount outstanding at period-end — — Weighted average interest rate at period-end — — Maximum month-end balance during the period — $ 360,000 Average balance outstanding during the period — $ 68,522 Weighted average interest rate during the period — 0.50 % FHLB advances are secured with eligible collateral consisting of certain real estate loans. Advances from the FHLB are subject to the FHLB’s collateral and underwriting requirements, and as of March 31, 2021 and December 31, 2020, were limited in the aggregate to 35% of the Company’s total assets. Loans with carrying values of approximately $1.4 billion and $1.5 billion were pledged to the FHLB as of March 31, 2021 and December 31, 2020, respectively. Unused borrowing capacity based on the lesser of the percentage of total assets and pledged collateral was approximately $866.7 million and $893.0 million as of March 31, 2021 and December 31, 2020, respectively. FRB Advances The Company is also approved to borrow through the Discount Window of the Federal Reserve Bank of San Francisco on a collateralized basis without any fixed dollar limit. Loans with a carrying value of approximately $6.2 million and $6.3 million were pledged to the FRB at March 31, 2021 and December 31, 2020, respectively. The Company’s borrowing capacity under the Federal Reserve’s discount window program was approximately $5.1 million and $4.8 million as of March 31, 2021 and December 31, 2020, respectively. At March 31, 2021 and December 31, 2020, there were no borrowings outstanding under any of these lines. Federal Funds Purchased The Company may borrow up to an aggregate $68.0 million, overnight on an unsecured basis, from three of its correspondent banks. Access to these funds is subject to liquidity availability, market conditions and any negative material change in the Company’s credit profile. As of March 31, 2021 and December 31, 2020, the Company had no outstanding balance of federal funds purchased.

Subordinated Debentures, Net

Subordinated Debentures, Net	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Subordinated Debentures, Net	Subordinated Debentures, Net A trust formed by the Company issued $12.5 million of floating rate trust preferred securities in July 2001 as part of a pooled offering of such securities. The Company issued subordinated debentures to the trust in exchange for its proceeds from the offering. The debentures and related accrued interest represent substantially all of the assets of the trust. The subordinated debentures bear interest at six-month LIBOR plus 375 basis points, which adjusts every six months in January and July of each year. Interest is payable semiannually. At March 31, 2021, the interest rate for the Company’s next scheduled payment was 3.98%, based on six-month LIBOR of 0.23%. On any January 25 or July 25 the Company may redeem the 2001 subordinated debentures at 100% of principal amount plus accrued interest. The 2001 subordinated debentures mature on July 25, 2031. A second trust formed by the Company issued $3.0 million of trust preferred securities in January 2005 as part of a pooled offering of such securities. The Company issued subordinated debentures to the trust in exchange for its proceeds from the offering. The debentures and related accrued interest represent substantially all of the assets of the trust. The subordinated debentures bear interest at three-month LIBOR plus 185 basis points, which adjusts every three months. Interest is payable quarterly. At March 31, 2021, the interest rate for the Company’s next scheduled payment was 2.03%, based on three-month LIBOR of 0.18%. On the 15th day of any March, June, September, or December, the Company may redeem the 2005 subordinated debentures at 100% of principal amount plus accrued interest. The 2005 subordinated debentures mature on March 15, 2035. The Company also retained a 3% minority interest in each of these trusts which is included in subordinated debentures. The balance of the equity in the trusts is comprised of mandatorily redeemable preferred securities. The subordinated debentures may be included in Tier I capital (with certain limitations applicable) under current regulatory guidelines and interpretations. The Company has the right to defer interest payments on the subordinated debentures from time to time for a period not to exceed five years. The outstanding balance of the subordinated debentures was $15.8 million, net of $0.1 million unamortized debt issuance cost as of March 31, 2021 and $15.8 million, net of $0.1 million unamortized debt issuance costs as of December 31, 2020.

Derivative and Hedging Activiti

Derivative and Hedging Activities	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Hedging Activities	Derivative and Hedging Activities The Company is exposed to certain risks relating to its ongoing business operations. The Company utilizes interest rate derivatives as part of its asset liability management strategy to help manage its interest rate risk position. The notional amount of the derivative does not represent amounts exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual derivative agreements. In accordance with accounting guidance, changes in the fair value of derivatives designated and that qualify as cash flow hedges are initially recorded in other comprehensive income (“OCI”), reclassified into earnings in the same period or periods during which the hedged transaction affects earnings and is presented in the same income statement line item as the earnings effect of the hedged item. The Company assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged transactions. For cash flow and fair value hedges, the initial fair value of hedge components excluded from the assessment of effectiveness is recognized in earnings under a systematic and rational method over the life of the hedging instrument and is presented in the same income statement line item as the earnings effect of the hedged item. Any difference between the change in the fair value of the hedge components excluded from the assessment of effectiveness and the amounts recognized in earnings is recorded as a component of other comprehensive income. For a fair value hedge, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item, are recognized in current earnings as fair values change. The changes in fair value of the hedged item is recorded as a basis adjustment to the hedged assets or liabilities. The amount included as basis adjustments would be reclassified to current earnings on a straight-line basis over the original life of the hedged item should the hedges no longer be considered effective. Interest rate swaps. In 2020, the Company entered into two pay-fixed/receive floating rate interest rate swaps (the “Swap Agreements”) for a notional amount of $14.3 million that were designated as fair value hedges of certain available-for-sale securities. The Swap Agreements were determined to be fully effective during the periods presented and therefore no amount of ineffectiveness has been included in net income. The Swap Agreements are based on three-month LIBOR and expire in 2030 and 2031. The Company expects the Swap Agreements to remain effective during the remaining term of the Swap Agreements. The Company may receive collateral or may be required to post collateral based upon the market valuation. As of March 31, 2021, the Company held $0.3 million in cash collateral posted by the counterparty. Interest rate floors. In 2019, the Company entered into 20 interest rate floor agreements (the “Floor Agreements”) for a total notional amount of $400.0 million to hedge cash flow receipts on cash and securities or loans, if needed. The original Floor Agreements expire on various dates in April 2024 and July 2029. The Company utilizes one-month LIBOR and three-month LIBOR interest rate floors as hedges against adverse changes in cash flows on the designated cash, securities or loans attributable to fluctuations in the federal funds rate or three-month LIBOR below 2.50% or 2.25%, as applicable. The Floor Agreements were determined to be fully effective during all periods presented and, as such, no amount of ineffectiveness has been included in net income. The upfront fee paid to the counterparty in entering into these Floor Agreements was approximately $20.8 million. During the three months ended March 31, 2020, the Company sold $200.0 million of its total $400.0 million notional amount of interest rate floors for $13.0 million, which resulted in a net gain of $8.4 million, to be recognized over the weighted average remaining term of 4.1 years. The remaining agreements are one-month LIBOR floors with a strike price of 2.25% and expire in July 2029. Interest rate caps. In March 2021, the Company entered into 13 interest rate cap agreements with a total notional amount of $205.0 million (“Federal Funds Rate Cap Agreements”). The Federal Funds Rate Cap Agreements are designated as fair value hedges against changes in the fair value of certain fixed rate tax-exempt municipal bonds. The Company utilizes the interest rate caps as hedges against adverse changes in interest rates on the designated securities attributable to fluctuations in the federal funds rate above 2.00%, as applicable. An increase in the benchmark interest rate hedged reduces the fair value of these assets. The Federal Funds Rate Cap Agreements expire on various dates from 2027 to 2032. The upfront fee paid to the counterparties was approximately $9.5 million. The Company expects the Federal Funds Rate Cap Agreements to remain effective during the remaining term of the respective agreements. In 2012, the Company entered into a $12.5 million and a $3.0 million notional forward interest rate cap agreement (the “LIBOR Cap Agreements”) to hedge its variable rate subordinated debentures. The LIBOR Cap Agreements expire July 25, 2022 and March 15, 2022, respectively. The Company utilizes interest rate caps as hedges against adverse changes in cash flows on the designated preferred trusts attributable to fluctuations in three-month LIBOR beyond 0.50% for the $3.0 million subordinated debenture and six-month LIBOR beyond 0.75% for the $12.5 million subordinated debenture. The Cap Agreements were determined to be fully effective during all periods presented and, as such, no amount of ineffectiveness has been included in net income. The upfront fee paid to the counterparty in entering into these LIBOR Cap Agreements was approximately $2.5 million. The table below presents the fair value of the Company’s derivative financial instruments as well as the classification within the consolidated statements of financial condition. March 31, December 31, Balance Sheet Fair Value Balance Sheet Fair Value (Dollars in thousands) Derivatives designated as hedging instruments: Cash flow hedge interest rate floor Derivative assets $ 22,451 Derivative assets $ 30,766 Cash flow hedge interest rate cap Derivative assets — Derivative assets — Fair value hedge interest rate swap Derivative assets 1,410 Derivative assets 338 Fair value hedge interest rate cap Derivative assets 10,581 Derivative assets — The following table presents the cumulative basis adjustments on hedged items designated as fair value hedges and the related amortized cost of those items as of the periods presented. Carrying Amount Cumulative Amount of Fair March 31, December 31, March 31, December 31, (Dollars in thousands) Line Item in the Statement of Financial Condition of Hedged Item: Securities available-for-sale $ 204,627 $ 15,367 $ (2,153) $ (278) The following table summarizes the effects of derivatives in cash flow and fair value hedging relationships designated as hedging instruments on the Company’s OCI and consolidated statements of operations for the periods presented. Amount of Gain (Loss) Location of Gain (Loss) Amount of Gain (Loss) Three Months Ended Three Months Ended 2021 2020 2021 2020 (Dollars in thousands) Derivatives designated as hedging instruments: Cash flow hedge interest rate floor $ (1,450) $ 6,096 Interest income - Other interest earning assets $ 136 $ 125 Cash flow hedge interest rate floor (5,800) 17,666 Interest income - Taxable securities 1,052 117 Cash flow hedge interest rate cap — (280) Interest expense - Subordinated debentures (99) (55) Fair value hedge interest rate cap (1) 375 — ________________________ (1) Represents amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded in other comprehensive income. The Company estimates that approximately $4.8 million of net derivative gain for cash flow hedges included in OCI will be reclassified into earnings within the next 12 months. No gain or loss was reclassified from OCI into earnings as a result of forecasted transactions that failed to occur during the periods presented. The following table presents the effect of fair value hedge accounting on the Company’s consolidated statements of operations for the periods presented. Location and Amount of Gain or (Loss) Three Months Ended March 31, 2021 2020 Interest income - Taxable securities Interest income - Tax-exempt securities Interest income - Taxable securities Interest income - Tax-exempt securities (Dollars in thousands) Total interest income presented in the statement of operations in which the effects of fair value hedges are recorded $ 3,592 $ 1,695 $ 6,048 $ 48 Effects of fair value hedging relationships Interest rate contracts: Hedged items $ (1,072) $ (743) $ — $ — Derivatives designated as hedging instruments 1,053 743 — — Amount excluded from effectiveness testing recognized in earnings based on amortization approach — (25) — —

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Comparison of the federal statutory income tax rates to the Company’s effective income tax rates for the periods presented are as follows: Three Months Ended March 31, 2021 2020 Amount Rate Amount Rate (Dollars in thousands) Statutory federal tax $ 2,415 21.0 % $ 1,295 21.0 % State tax, net of federal benefit (451) (3.9) % 494 8.0 % Tax credits (41) (0.4) % (56) (0.9) % Tax-exempt income (347) (3.0) % — — Excess tax benefit from stock-based compensation (3,003) (26.1) % — — Other items, net 216 1.9 % 41 0.7 % Actual tax (benefit) expense $ (1,211) (10.5) % $ 1,774 28.8 % Income tax benefit was $1.2 million for the three months ended March 31, 2021 compared to an expense of $1.8 million for the three months ended March 31, 2020. The effective tax rates for the three months ended March 31, 2021 and 2020 were (10.5)% and 28.8%, respectively. The decrease in the income tax expense and the Company’s effective tax rate was primarily related to excess tax benefit from stock-based compensation and tax-exempt income earned on certain municipal bonds. The deferred tax liability balance as of March 31, 2021 was $10.2 million compared to $15.4 million as of December 31, 2020. The primary change in balance was due to the decrease in unrealized gains on available-for-sale securities portfolio and derivative assets.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Off-Balance Sheet Items In the normal course of business, the Company enters into various transactions, which, in accordance with GAAP, are not included in the consolidated statements of financial condition. The Company enters into these transactions to meet the financing needs of its customers. These transactions include commitments to extend credit and issue letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk exceeding the amounts recognized on the consolidated statements of financial condition. The Company’s exposure to credit loss is represented by the contractual amounts of these commitments. The same credit policies and procedures are used in making these commitments as for on-balance sheet instruments. The Company is not aware of any accounting loss to be incurred by funding these commitments, however, an allowance for off-balance sheet credit risk is recorded in other liabilities on the statements of financial condition. The allowance for these commitments amounted to approximately $0.3 million and $0.1 million at March 31, 2021 and December 31, 2020, respectively. The Company’s commitments associated with outstanding letters of credit and commitments to extend credit expiring by period as of the date indicated are summarized below. Since commitments associated with letters of credit and commitments to extend credit may expire unused, the amounts shown do not necessarily reflect the actual future cash funding requirements. March 31, December 31, (Dollars in thousands) Unfunded lines of credit $ 119,931 $ 49,487 Letters of credit 133 133 Total credit extension commitments $ 120,064 $ 49,620 Unfunded lines of credit represent unused credit facilities to the Company’s current borrowers that represent no change in credit risk that exist in the Company’s portfolio. Lines of credit generally have variable interest rates. Letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. In the event of nonperformance by the customer in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount of the commitment. If the commitment is funded, the Company would be entitled to seek recovery from the client from the underlying collateral, which can include commercial real estate, physical plant and property, inventory, receivables, bitcoin, cash and/or marketable securities. The Company’s policies generally require that letter of credit arrangements contain security and debt covenants like those contained in loan agreements and our credit risk associated with issuing letters of credit is essentially the same as the risk involved in extending loan facilities to customers. The Company minimizes its exposure to loss under letters of credit and credit commitments by subjecting them to the same credit approval and monitoring procedures used for on-balance sheet instruments. The effect on the Company’s revenue, expenses, cash flows and liquidity of the unused portions of these letters of credit commitments cannot be precisely predicted because there is no guarantee that the lines of credit will be used. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract, for a specific purpose. Commitments generally have variable interest rates, fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts disclosed above do not necessarily represent future cash requirements. The Company evaluates each customer’s credit worthiness on a case-by-case basis. The amount of collateral obtained if deemed necessary by the Company is based on management’s credit evaluation of the customer. Litigation The Company is involved in various matters of litigation which have arisen in the ordinary course of its business. In the opinion of management, the disposition of such pending litigation will not have a material adverse effect on the Company’s financial statements.

Stock-based Compensation

Stock-based Compensation	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock-based Compensation	Stock-based Compensation In June 2018, the Company adopted the 2018 Equity Compensation Plan, or 2018 Plan, that permits the Compensation Committee, in its sole discretion, to grant various forms of incentive awards. Under the 2018 Plan, the Compensation Committee has the power to grant stock options, stock appreciation rights, or SARs, restricted stock and restricted stock units. The number of shares that may be issued pursuant to awards under the 2018 Plan is 1,596,753. In accordance with authoritative guidance for stock-based compensation, compensation expense is recognized only for those shares expected to vest, based on the Company’s historical experience and future expectations. The Company has elected a policy of estimating expected forfeitures. Total stock-based compensation expense was $0.3 million and $0.2 million for the three months ended March 31, 2021 and 2020, respectively. A summary of stock option activity as of March 31, 2021 and changes during the three months ended March 31, 2021 is presented below: Number of Weighted Weighted Average Remaining Contractual Life (in years) Aggregate Intrinsic Value (in thousands) Outstanding at January 1, 2021 595,303 $ 8.01 Granted 18,585 127.56 Exercised (159,122) 4.76 Forfeited or expired (2,272) 16.09 Outstanding at March 31, 2021 452,494 $ 14.03 4.6 years $ 57,984 Exercisable at March 31, 2021 292,311 $ 6.10 2.4 years $ 39,775 Vested or Expected to Vest at March 31, 2021 436,078 $ 13.49 4.5 years $ 56,113 As of March 31, 2021, there was $1.4 million of total unrecognized compensation cost related to nonvested stock options which is expected to be recognized over a weighted-average period of 2.8 years. Restricted Stock Units A summary of the status of the Company’s nonvested restricted stock unit awards as of March 31, 2021, and changes during the three months ended March 31, 2021, is presented below: Number of Shares Weighted-Average Nonvested at January 1, 2021 58,690 $ 15.61 Granted 25,722 $ 127.56 Vested (294) $ 14.89 Forfeited (849) $ 26.33 Nonvested at March 31, 2021 83,269 $ 50.08 At March 31, 2021, there was approximately $3.2 million of total unrecognized compensation expense related to nonvested restricted stock unit awards, which is expected to be recognized over a weighted-average period of 3.0 years.

Regulatory Capital

Regulatory Capital	3 Months Ended
	Mar. 31, 2021
Regulated Operations [Abstract]
Regulatory Capital	Regulatory Capital Banks and bank holding companies are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off-balance-sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action. The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Company on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. Under the Basel III rules, the Company must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. As of January 1, 2019, the capital conservation buffer had fully phased in to 2.50%. Inclusive of the fully phased-in capital conservation buffer, the common equity tier 1 capital ratio, tier 1 risk-based capital ratio and total risk-based capital ratio minimums are 7.00%, 8.50% and 10.50%, respectively. The net unrealized gain or loss on available for sale securities and derivatives are not included in computing regulatory capital. Management believes, as of March 31, 2021, the Company and the Bank met all capital adequacy requirements to which they were subject. Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required. For the periods presented, the most recent regulatory notifications categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the institution’s category. Actual capital amounts and ratios for the Company and the Bank as of March 31, 2021 and December 31, 2020, are presented in the following tables: Actual Minimum capital adequacy (1) To be well Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) March 31, 2021 The Company Tier 1 leverage ratio $ 698,604 9.68 % $ 288,754 4.00 % N/A N/A Common equity tier 1 capital ratio 683,104 53.03 % 57,967 4.50 % N/A N/A Tier 1 risk-based capital ratio 698,604 54.23 % 77,289 6.00 % N/A N/A Total risk-based capital ratio 705,820 54.79 % 103,052 8.00 % N/A N/A The Bank Tier 1 leverage ratio 685,463 9.50 % 288,744 4.00 % $ 360,930 5.00 % Common equity tier 1 capital ratio 685,463 53.24 % 57,934 4.50 % 83,682 6.50 % Tier 1 risk-based capital ratio 685,463 53.24 % 77,245 6.00 % 102,994 8.00 % Total risk-based capital ratio 692,679 53.80 % 102,994 8.00 % 128,742 10.00 % Actual Minimum capital adequacy (1) To be well Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2020 The Company Tier 1 leverage ratio $ 263,763 8.29 % $ 127,338 4.00 % N/A N/A Common equity tier 1 capital ratio 248,263 21.53 % 51,882 4.50 % N/A N/A Tier 1 risk-based capital ratio 263,763 22.88 % 69,176 6.00 % N/A N/A Total risk-based capital ratio 270,803 23.49 % 92,234 8.00 % N/A N/A The Bank Tier 1 leverage ratio 261,791 8.22 % 127,344 4.00 % $ 159,180 5.00 % Common equity tier 1 capital ratio 261,791 22.71 % 51,869 4.50 % 74,923 6.50 % Tier 1 risk-based capital ratio 261,791 22.71 % 69,159 6.00 % 92,212 8.00 % Total risk-based capital ratio 268,831 23.32 % 92,212 8.00 % 115,265 10.00 % ________________________ (1) Minimum capital adequacy for common equity tier 1 capital ratio, tier 1 risk-based capital ratio and total risk-based capital ratio excludes the capital conservation buffer. The Bank is restricted as to the amount of dividends that it can pay to the Company. Dividends declared in excess of the lesser of the Bank’s undivided profits or the Bank’s net income for its last three fiscal years less the amount of any distribution made to the Bank’s shareholder during the same period must be approved by the California DFPI. Also, the Bank may not pay dividends that would result in capital levels being reduced below the minimum requirements shown above.

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. This standard’s fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value: Level 1— Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. Level 2— Significant observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3— Significant unobservable inputs that reflect a Company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. Financial Instruments Required To Be Carried At Fair Value The following is a description of valuation methodologies used for assets and liabilities recorded at fair value: Securities . The fair values of securities available-for-sale and trading securities are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1) or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2). Derivatives . The Company’s derivative assets and liabilities are carried at fair value as required by GAAP. The estimated fair values of the derivative assets and liabilities are based on current market prices for similar instruments. Given the meaningful level of secondary market activity for derivative contracts, active pricing is available for similar assets and accordingly, the Company classifies its derivative assets and liabilities as Level 2. Impaired loans (collateral-dependent) . The Company does not record impaired loans at fair value on a recurring basis. However, from time to time, fair value adjustments are recorded on these loans to reflect (1) partial write-downs, through charge-offs or specific allowances, that are based on the current appraised or market-quoted value of the underlying collateral or (2) the full charge-off of the loan carrying value. In some cases, the properties for which market quotes or appraised values have been obtained are located in areas where comparable sales data is limited, outdated, or unavailable. Fair value estimates for collateral-dependent impaired loans are obtained from real estate brokers or other third-party consultants. These appraisals may utilize a single valuation approach or a combination of approaches, which generally include various Level 3 inputs. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available and such adjustments are typically significant. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary. Impaired loans presented in the table below as of the periods presented include impaired loans with specific allowances as well as impaired loans that have been partially charged-off. Other real estate owned . Fair value estimates for foreclosed real estate are obtained from real estate brokers or other third-party consultants (Level 3). When a current appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value as a result of known changes in the market or the collateral and there is no observable market price, such valuation inputs result in a fair value measurement that is categorized as a Level 3 measurement. To the extent a negotiated sales price or reduced listing price represents a significant discount to an observable market price, such valuation input would result in a fair value measurement that is also considered a Level 3 measurement. The following tables provide the hierarchy and fair value for each class of assets and liabilities measured at fair value at March 31, 2021 and December 31, 2020. As of March 31, 2021 and December 31, 2020, assets and liabilities measured at fair value on a recurring basis are as follows: Fair Value Measurements Using Quoted Prices Significant Other Significant Level 1 Level 2 Level 3 Total (Dollars in thousands) March 31, 2021 Assets Trading securities $ 1,990 $ — $ — $ 1,990 Securities available-for-sale — 1,717,418 — 1,717,418 Derivative assets — 34,442 — 34,442 $ 1,990 $ 1,751,860 $ — $ 1,753,850 Fair Value Measurements Using Quoted Prices Significant Other Significant Level 1 Level 2 Level 3 Total (Dollars in thousands) December 31, 2020 Assets Securities available-for-sale $ — $ 939,015 $ — $ 939,015 Derivative assets — 31,104 — 31,104 $ — $ 970,119 $ — $ 970,119 As of March 31, 2021 and December 31, 2020, assets measured at fair value on a non-recurring basis are summarized as follows: Fair Value Measurements Using Quoted Prices Significant Other Significant Level 1 Level 2 Level 3 Total (Dollars in thousands) March 31, 2021 Assets Impaired loans: Reverse mortgage $ — $ — $ 69 $ 69 December 31, 2020 Assets Impaired loans: Reverse mortgage $ — $ — $ 317 $ 317 Quantitative Information about Level 3 Fair Value Measurements The following table presents the valuation methodology and unobservable inputs for Level 3 assets measured at fair value on a nonrecurring basis as of the date indicated: Fair Value Valuation Technique(s) Significant Range Weighted Average (1) (Dollars in thousands) March 31, 2021 Collateral-dependent impaired loans $ 69 Market comparable properties Marketability discount 10.0 % 10.0 % Selling cost 8.0 % 8.0 % December 31, 2020 Collateral-dependent impaired loans $ 317 Market comparable properties Marketability discount 10.0 % 10.0 % Selling cost 8.0 % 8.0 % ________________________ (1) Unobservable inputs were weighted by the relative fair value of the instruments. Financial Instruments Not Required To Be Carried At Fair Value FASB ASC Topic 825, Financial Instruments , requires the disclosure of the estimated fair value of financial instruments. The Company’s estimated fair value amounts have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to develop the estimates of fair value. Accordingly, the estimates are not necessarily indicative of the amounts the Company could have realized in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. The following tables present information about the Company’s assets and liabilities that are not measured at fair value in the consolidated statements of financial condition as of the dates presented: Carrying Fair Value Measurements Using Level 1 Level 2 Level 3 Total (Dollars in thousands) March 31, 2021 Financial assets: Cash and due from banks $ 16,422 $ 16,422 $ — $ — $ 16,422 Interest earning deposits 4,315,100 4,315,100 — — 4,315,100 Loans held-for-sale 897,227 — 897,227 — 897,227 Loans held-for-investment, net 728,390 — — 732,754 732,754 Accrued interest receivable 9,432 119 2,797 6,516 9,432 Financial liabilities: Deposits $ 7,002,371 $ — $ 7,269,900 $ — $ 7,269,900 Subordinated debentures, net 15,834 — 15,333 — 15,333 Accrued interest payable 107 — 107 — 107 Carrying Fair Value Measurements Using Level 1 Level 2 Level 3 Total (Dollars in thousands) December 31, 2020 Financial assets: Cash and due from banks $ 16,405 $ 16,405 $ — $ — $ 16,405 Interest earning deposits 2,945,682 2,945,682 — — 2,945,682 Loans held-for-sale 865,961 — 865,961 — 865,961 Loans held-for-investment, net 746,751 — — 751,165 751,165 Accrued interest receivable 8,698 8 2,630 6,060 8,698 Financial liabilities: Deposits $ 5,248,026 $ — $ 5,458,900 $ — $ 5,458,900 Subordinated debentures, net 15,831 — 15,231 — 15,231 Accrued interest payable 260 — 260 — 260

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The computation of basic and diluted earnings per share is shown below. Three Months Ended 2021 2020 (In thousands, except per share data) Basic Net income $ 12,710 $ 4,393 Weighted average common shares outstanding 22,504 18,668 Basic earnings per common share $ 0.56 $ 0.24 Diluted Net income $ 12,710 $ 4,393 Weighted average common shares outstanding for basic earnings per common share 22,504 18,668 Add: Dilutive effects of stock-based awards 506 449 Average shares and dilutive potential common shares 23,010 19,117 Dilutive earnings per common share $ 0.55 $ 0.23 Stock-based awards for 44,000 and 235,000 shares of common stock for the three months ended March 31, 2021 and 2020, respectively, were excluded from the computation of diluted earnings per share, because they were anti-dilutive.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsAs of May 11, 2021, the Company sold 515,239 shares of Class A common stock at an average price of $118.10 under the ATM Program that resulted in gross proceeds of $60.8 million

Nature of Business and Summar_2

Nature of Business and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Financial Statement Preparation and Presentation	The accompanying interim consolidated financial statements have been prepared by the Company, without an audit, in accordance with the instructions to the Quarterly Report on Form 10-Q, and Rule 10-01 of Regulation S-X promulgated by the United States Securities and Exchange Commission (the “SEC”) and, therefore, do not include all information and footnotes necessary for a fair presentation of its consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”). In the opinion of management, the unaudited financial information for the interim periods presented reflects all adjustments, consisting of only normal and recurring adjustments, necessary for a fair statement of the Company’s consolidated financial statements. These consolidated statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2020, included in the Company’s Annual Report on Form 10-K dated March 8, 2021. Operating results for interim periods are not necessarily indicative of operating results for an entire fiscal year.
Consolidation	The consolidated financial statements include the accounts of the Company and all other entities in which it has a controlling financial interest. All significant intercompany accounts and transactions have been eliminated in consolidation. Unless the context requires otherwise, all references to the Company include its wholly owned subsidiaries. The accounting and reporting policies of the Company are based upon GAAP and conform to predominant practices within the financial services industry.
Use of Estimates	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts and the disclosure of contingent amounts in the Company’s financial statements and the accompanying notes. We evaluate estimates on an ongoing basis including the economic impact of Coronavirus Disease 2019 (or “COVID-19”). Actual results could materially differ from those estimates.
Recently issued accounting pronouncements not yet effective	In June 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (or “ASU”) 2016-13, Financial Instruments-Credit Losses (Topic 326) to replace the incurred loss model with an expected loss model, which is referred to as the current expected credit loss (or “CECL”) model. The CECL model is applicable to the measurement of credit losses on financial assets measured at amortized cost, including loan receivables, held to maturity debt securities, and reinsurance receivables. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor. These amendments were initially effective for fiscal years beginning after December 15, 2019 for SEC registrants and after December 15, 2020, for Public Business Entities, or PBEs. In November 2019, the FASB issued ASU 2019-10, Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842): Effective Dates, which finalized the delay of the effective date for smaller reporting companies, such as the Company to apply the standards related to CECL, until fiscal years beginning after December 15, 2022. For debt securities with other than temporary impairment (OTTI), the guidance will be applied prospectively and for existing purchased credit impaired (PCI) assets will be grandfathered and classified as purchased credit deteriorated (PCD) assets at the date of adoption. The asset will be grossed up for the allowance for expected credit losses for all PCD assets at the date of adoption and will continue to recognize the noncredit discount in interest income based on the yield such assets as of the adoption date. Subsequent changes in expected credit losses will be recorded through the allowance. For all other assets with the scope of CECL, the cumulative effect adjustment will be recognized in retained earnings as of the beginning of the first reporting period in which the guidance is effective. In November 2018, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, which clarify that receivables arising from operating leases are not within the scope of Subtopic 326-20. Instead, impairment of receivables arising from operating leases should be accounted for in accordance with Topic 842, Leases. The Company formed a CECL implementation committee in 2018 which prepared a project plan to migrate towards the adoption date. As part of the project plan, the Company contracted a third-party vendor to assist in the application and analysis of ASU 2016-13 as well as a third party vendor to perform an independent model validation. As part of this process, the Company has determined preliminary loan pool segmentation under CECL, as well as evaluated the key economic loss drivers for each segment. The Company operationalized an initial CECL model during the second quarter of 2019 and is running this preliminary CECL model alongside the existing incurred loss methodology. The Company intends to continue to refine and run the model until the expected adoption date on January 1, 2023. The Company continues to evaluate the effects of ASU 2016-13 on its financial statements and disclosures. 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 (or “ASU 2020-04”), which provides temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from the London Interbank Offered Rate (or “LIBOR”) or other interbank offered rate (reference rates) on financial reporting. In the fourth quarter of 2020 the Office of the Comptroller of the Currency, amongst others, announced that the overnight and one, three, six and twelve month USD LIBOR will be discontinued on June 30, 2023. It was originally expected that LIBOR would be discontinued by the end of 2021. To help with the transition to new reference rates, the ASU provides optional expedients and exceptions for applying GAAP to affected contract modifications and hedge accounting relationships. The guidance is applicable only to contracts or hedge accounting relationships that reference LIBOR or another reference rate expected to be discontinued. The expedients and exceptions in this update are available to all entities starting March 12, 2020 through December 31, 2022. In January 2020, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848), which clarifies the scope of Topic 848 to include derivative instruments impacted by discounting transition. The Company has created a subcommittee of the Asset Liability Management Committee to address the LIBOR transition and phase-out issues. The Company has identified its LIBOR-based contracts that will be impacted by the transition away from of LIBOR, and is incorporating fallback language in negotiated contracts and incorporating non-LIBOR reference rate and/or fallback language in new contracts to prepare for these changes. The Company is evaluating the impact that ASU 2020-04 will have on those financial assets where LIBOR is used as an index rate.
Financial Instruments Required To Be Carried At Fair Value	The following is a description of valuation methodologies used for assets and liabilities recorded at fair value: Securities . The fair values of securities available-for-sale and trading securities are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1) or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2). Derivatives . The Company’s derivative assets and liabilities are carried at fair value as required by GAAP. The estimated fair values of the derivative assets and liabilities are based on current market prices for similar instruments. Given the meaningful level of secondary market activity for derivative contracts, active pricing is available for similar assets and accordingly, the Company classifies its derivative assets and liabilities as Level 2. Impaired loans (collateral-dependent) . The Company does not record impaired loans at fair value on a recurring basis. However, from time to time, fair value adjustments are recorded on these loans to reflect (1) partial write-downs, through charge-offs or specific allowances, that are based on the current appraised or market-quoted value of the underlying collateral or (2) the full charge-off of the loan carrying value. In some cases, the properties for which market quotes or appraised values have been obtained are located in areas where comparable sales data is limited, outdated, or unavailable. Fair value estimates for collateral-dependent impaired loans are obtained from real estate brokers or other third-party consultants. These appraisals may utilize a single valuation approach or a combination of approaches, which generally include various Level 3 inputs. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available and such adjustments are typically significant. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary. Impaired loans presented in the table below as of the periods presented include impaired loans with specific allowances as well as impaired loans that have been partially charged-off. Other real estate owned . Fair value estimates for foreclosed real estate are obtained from real estate brokers or other third-party consultants (Level 3). When a current appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value as a result of known changes in the market or the collateral and there is no observable market price, such valuation inputs result in a fair value measurement that is categorized as a Level 3 measurement. To the extent a negotiated sales price or reduced listing price represents a significant discount to an observable market price, such valuation input would result in a fair value measurement that is also considered a Level 3 measurement.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-Sale Securities and Gross Unrealized Gains and Losses	The fair value of available-for-sale securities and their related gross unrealized gains and losses at the dates indicated are as follows: Available-for-sale securities Amortized Cost Gross Gross Fair Value (Dollars in thousands) March 31, 2021 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 152,253 $ 167 $ (1,202) $ 151,218 Government agency collateralized mortgage obligation 686,030 194 (2,844) 683,380 Private-label collateralized mortgage obligation 18,688 530 (170) 19,048 Commercial mortgage-backed securities: Government agency mortgage-backed securities 49,135 2 (24) 49,113 Government agency collateralized mortgage obligation 42,435 — (35) 42,400 Private-label collateralized mortgage obligation 163,993 10,504 — 174,497 Municipal bonds: Tax-exempt 318,132 18,801 (13) 336,920 Taxable 14,206 1,485 (48) 15,643 Asset backed securities: Government sponsored student loan pools 245,716 298 (815) 245,199 $ 1,690,588 $ 31,981 $ (5,151) $ 1,717,418 Available-for-sale securities Amortized Cost Gross Gross Fair Value (Dollars in thousands) December 31, 2020 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 5,701 $ 18 $ (55) $ 5,664 Government agency collateralized mortgage obligation 197,978 371 (298) 198,051 Private-label collateralized mortgage obligation 20,544 399 (256) 20,687 Commercial mortgage-backed securities: Private-label collateralized mortgage obligation 164,214 18,322 — 182,536 Municipal bonds: Tax-exempt 246,159 24,200 — 270,359 Taxable 15,307 695 — 16,002 Asset backed securities: Government sponsored student loan pools 248,848 17 (3,149) 245,716 $ 898,751 $ 44,022 $ (3,758) $ 939,015
Schedule of Securities with Unrealized Losses	Securities with unrealized losses as of the dates indicated, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows: Available-for-sale securities Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized (Dollars in thousands) March 31, 2021 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 102,614 $ (1,202) $ — $ — $ 102,614 $ (1,202) Government agency collateralized mortgage obligation 478,392 (2,699) 52,294 (145) 530,686 (2,844) Private-label collateralized mortgage obligation — — 8,609 (170) 8,609 (170) Commercial mortgage-backed securities: Government agency mortgage-backed securities 18,203 (24) — — 18,203 (24) Government agency collateralized mortgage obligation 30,900 (35) — — 30,900 (35) Municipal bonds: Tax-exempt 23,800 (13) — — 23,800 (13) Taxable 5,767 (48) — — 5,767 (48) Asset backed securities: Government sponsored student loan pools 44,065 (80) 120,704 (735) 164,769 (815) $ 703,741 $ (4,101) $ 181,607 $ (1,050) $ 885,348 $ (5,151) Available-for-sale securities Less than 12 Months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized (Dollars in thousands) December 31, 2020 Residential mortgage-backed securities: Government agency mortgage-backed securities $ 5,165 $ (55) $ — $ — $ 5,165 $ (55) Government agency collateralized mortgage obligation 120,912 (172) 56,976 (126) 177,888 (298) Private-label collateralized mortgage obligation 290 (7) 9,950 (249) 10,240 (256) Asset backed securities: Government sponsored student loan pools — — 240,825 (3,149) 240,825 (3,149) $ 126,367 $ (234) $ 307,751 $ (3,524) $ 434,118 $ (3,758)
Schedule of Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity	The amortized cost and estimated fair value of investment securities as of the periods presented by contractual maturity are shown below. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. For purposes of the following table, the entire outstanding balance of residential and commercial mortgage-backed securities is categorized based on the final maturity date. March 31, December 31, Amortized Fair Amortized Fair (Dollars in thousands) Available-for-sale securities Within one year $ — $ — $ — $ — After one year through five years — — — — After five years through ten years 56,363 57,091 14,021 15,694 After ten years 1,634,225 1,660,327 884,730 923,321 Total $ 1,690,588 $ 1,717,418 $ 898,751 $ 939,015

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Schedule of Loans	A summary of loans as of the periods presented are as follows: March 31, December 31, (Dollars in thousands) Real estate loans: One-to-four family $ 171,045 $ 187,855 Multi-family 74,003 77,126 Commercial 287,411 301,901 Construction 5,172 6,272 Commercial and industrial 118,598 78,909 Reverse mortgage and other 1,346 1,495 Mortgage warehouse 76,014 97,903 Total gross loans held-for-investment 733,589 751,461 Deferred fees, net 1,717 2,206 Total loans held-for-investment 735,306 753,667 Allowance for loan losses (6,916) (6,916) Total loans held-for-investment, net $ 728,390 $ 746,751 Total loans held-for-sale (1) $ 897,227 $ 865,961 ________________________ (1) Loans held-for-sale are comprised entirely of mortgage warehouse loans for all periods presented.
Schedule of Allowance for Loan Losses	The following tables present the allocation of the allowance for loan losses, as well as the activity in the allowance by loan class, and recorded investment in loans held-for-investment as of and for the periods presented: Three Months Ended March 31, 2021 One-to Multi- Commercial Construction Commercial Reverse Mortgage Total (Dollars in thousands) Balance, December 31, 2020 $ 1,245 $ 878 $ 1,810 $ 590 $ 1,931 $ 39 $ 423 $ 6,916 Charge-offs — — — — — — — — Recoveries — — — — — — — — Provision for loan losses 389 (50) 1,441 (97) (1,571) (21) (91) — Balance, March 31, 2021 $ 1,634 $ 828 $ 3,251 $ 493 $ 360 $ 18 $ 332 $ 6,916 Three Months Ended March 31, 2020 One-to Multi- Commercial Construction Commercial and Reverse Mortgage Total (Dollars in thousands) Balance, December 31, 2019 $ 2,051 $ 653 $ 2,791 $ 96 $ 312 $ 38 $ 250 $ 6,191 Charge-offs — — — — — — — — Recoveries — — — — — — — — Provision for loan losses (80) 36 166 162 114 1 (32) 367 Balance, March 31, 2020 $ 1,971 $ 689 $ 2,957 $ 258 $ 426 $ 39 $ 218 $ 6,558 March 31, 2021 One-to Multi- Commercial Construction Commercial Reverse Mortgage Total (Dollars in thousands) Amount of allowance attributed to: Specifically evaluated impaired loans $ 12 $ — $ — $ — $ — $ 7 $ — $ 19 General portfolio allocation 1,622 828 3,251 493 360 11 332 6,897 Total allowance for loan losses $ 1,634 $ 828 $ 3,251 $ 493 $ 360 $ 18 $ 332 $ 6,916 Loans evaluated for impairment: Specifically evaluated $ 5,141 $ — $ 9,830 $ — $ 237 $ 876 $ — $ 16,084 Collectively evaluated 165,904 74,003 277,581 5,172 118,361 470 76,014 717,505 Total gross loans held-for-investment $ 171,045 $ 74,003 $ 287,411 $ 5,172 $ 118,598 $ 1,346 $ 76,014 $ 733,589 December 31, 2020 One-to Multi- Commercial Construction Commercial Reverse Mortgage Total (Dollars in thousands) Amount of allowance attributed to: Specifically evaluated impaired loans $ 11 $ — $ — $ — $ — $ 29 $ — $ 40 General portfolio allocation 1,234 878 1,810 590 1,931 10 423 6,876 Total allowance for loan losses $ 1,245 $ 878 $ 1,810 $ 590 $ 1,931 $ 39 $ 423 $ 6,916 Loans evaluated for impairment: Specifically evaluated $ 5,780 $ — $ 9,722 $ — $ 274 $ 869 $ — $ 16,645 Collectively evaluated 182,075 77,126 292,179 6,272 78,635 626 97,903 734,816 Total gross loans held-for-investment $ 187,855 $ 77,126 $ 301,901 $ 6,272 $ 78,909 $ 1,495 $ 97,903 $ 751,461
Schedule of Investments in Impaired Loans	The following tables provide a summary of the Company’s investment in impaired loans as of and for the periods presented: March 31, 2021 Unpaid Recorded Related (Dollars in thousands) With no related allowance recorded: Real estate loans: One-to-four family $ 5,742 $ 5,077 $ — Commercial 9,830 9,830 — Commercial and industrial 237 237 — Reverse mortgage and other 801 800 — 16,610 15,944 — With an allowance recorded: Real estate loans: One-to-four family 64 64 12 Reverse mortgage and other 76 76 7 140 140 19 Total impaired loans $ 16,750 $ 16,084 $ 19 December 31, 2020 Unpaid Recorded Related (Dollars in thousands) With no related allowance recorded: Real estate loans: One-to-four family $ 6,432 $ 5,716 $ — Commercial 9,723 9,722 — Commercial and industrial 274 274 — Reverse mortgage and other 523 523 — 16,952 16,235 — With an allowance recorded: Real estate loans: One-to-four family 64 64 11 Reverse mortgage and other 346 346 29 410 410 40 Total impaired loans $ 17,362 $ 16,645 $ 40 Three Months Ended March 31, 2021 2020 Average Interest Average Interest (Dollars in thousands) With no related allowance recorded: Real estate loans: One-to-four family $ 4,979 $ 77 $ 3,731 $ 26 Commercial 9,795 128 1,941 21 Commercial and industrial 249 5 2,329 42 Reverse mortgage and other 616 — 511 — 15,639 210 8,512 89 With an allowance recorded: Real estate loans: One-to-four family 64 1 66 1 Reverse mortgage and other 258 — 338 — 322 1 404 1 Total impaired loans $ 15,961 $ 211 $ 8,916 $ 90
Schedule of Aging Analysis by Loan Class	The following tables present by loan class the aging analysis based on contractual terms, nonaccrual loans, and the Company’s recorded investment in loans held-for-investment as of the periods presented: March 31, 2021 30-59 60-89 Greater Total Current Total Nonaccruing Loans (Dollars in thousands) Real estate loans: One-to-four family $ 2,773 $ 2,187 $ 2,834 $ 7,794 $ 163,251 $ 171,045 $ 4,457 $ — Multi-family — — — — 74,003 74,003 — — Commercial — — — — 287,411 287,411 — — Construction — — — — 5,172 5,172 — — Commercial and industrial — — — — 118,598 118,598 — — Reverse mortgage and other — — — — 1,346 1,346 876 — Mortgage warehouse — — — — 76,014 76,014 — — Total gross loans held-for-investment $ 2,773 $ 2,187 $ 2,834 $ 7,794 $ 725,795 $ 733,589 $ 5,333 $ — December 31, 2020 30-59 60-89 Greater Total Current Total Nonaccruing Loans (Dollars in thousands) Real estate loans: One-to-four family $ 992 $ 85 $ 3,820 $ 4,897 $ 182,958 $ 187,855 $ 4,113 $ — Multi-family 206 — — 206 76,920 77,126 — — Commercial — — — — 301,901 301,901 — — Construction — — — — 6,272 6,272 — — Commercial and industrial — — — — 78,909 78,909 — — Reverse mortgage and other — — — — 1,495 1,495 869 — Mortgage warehouse — — — — 97,903 97,903 — — Total gross loans held-for-investment $ 1,198 $ 85 $ 3,820 $ 5,103 $ 746,358 $ 751,461 $ 4,982 $ —
Schedule of Financing Receivable Credit Quality Indicators Description	The Company uses the following definitions for risk ratings: Pass : Loans in all classes that are not adversely rated, are contractually current as to principal and interest, and are otherwise in compliance with the contractual terms of the loan agreement. Management believes that there is a low likelihood of loss related to those loans that are considered pass. Special mention : Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. Substandard : Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful : Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, 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 : Credits rated as loss are charged-off. Management has no expectation of the recovery of any payments in respect of credits rated as loss.
Schedule of Financing Receivable Credit Quality Indicators	The following tables present by portfolio class the Company’s internal risk grading system as well as certain other information concerning the credit quality of the Company’s recorded investment in loans held-for-investment as of the periods presented. No assets were classified as loss or doubtful during the periods presented. Credit Risk Grades Pass Special Mention Substandard Doubtful Total (Dollars in thousands) March 31, 2021 Real estate loans: One-to-four family $ 163,313 $ 3,275 $ 4,457 $ — $ 171,045 Multi-family 74,003 — — — 74,003 Commercial 265,135 14,402 7,874 — 287,411 Construction 5,172 — — — 5,172 Commercial and industrial 118,361 — 237 — 118,598 Reverse mortgage and other 470 — 876 — 1,346 Mortgage warehouse 76,014 — — — 76,014 Total gross loans held-for-investment $ 702,468 $ 17,677 $ 13,444 $ — $ 733,589 Credit Risk Grades Pass Special Mention Substandard Doubtful Total (Dollars in thousands) December 31, 2020 Real estate loans: One-to-four family $ 180,458 $ 3,284 $ 4,113 $ — $ 187,855 Multi-family 77,126 — — — 77,126 Commercial 288,309 5,825 7,767 — 301,901 Construction 6,272 — — — 6,272 Commercial and industrial 78,635 — 274 — 78,909 Reverse mortgage and other 626 — 869 — 1,495 Mortgage warehouse 97,903 — — — 97,903 Total gross loans held-for-investment $ 729,329 $ 9,109 $ 13,023 $ — $ 751,461

FHLB Advances and Other Borro_2

FHLB Advances and Other Borrowings (Tables)	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Schedule of FHLB Advances	The following table sets forth certain information on our FHLB advances during the period presented: Three Months Ended Year Ended (Dollars in thousands) Amount outstanding at period-end — — Weighted average interest rate at period-end — — Maximum month-end balance during the period — $ 360,000 Average balance outstanding during the period — $ 68,522 Weighted average interest rate during the period — 0.50 %

Derivative and Hedging Activi_2

Derivative and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value of Derivative Financial Instruments and Classification within Statement of Financial Condition	The table below presents the fair value of the Company’s derivative financial instruments as well as the classification within the consolidated statements of financial condition. March 31, December 31, Balance Sheet Fair Value Balance Sheet Fair Value (Dollars in thousands) Derivatives designated as hedging instruments: Cash flow hedge interest rate floor Derivative assets $ 22,451 Derivative assets $ 30,766 Cash flow hedge interest rate cap Derivative assets — Derivative assets — Fair value hedge interest rate swap Derivative assets 1,410 Derivative assets 338 Fair value hedge interest rate cap Derivative assets 10,581 Derivative assets —
Schedule of Cumulative Basis Adjustments, Related Amortized Cost, and Effect of Fair Value Hedge Accounting	The following table presents the cumulative basis adjustments on hedged items designated as fair value hedges and the related amortized cost of those items as of the periods presented. Carrying Amount Cumulative Amount of Fair March 31, December 31, March 31, December 31, (Dollars in thousands) Line Item in the Statement of Financial Condition of Hedged Item: Securities available-for-sale $ 204,627 $ 15,367 $ (2,153) $ (278) The following table presents the effect of fair value hedge accounting on the Company’s consolidated statements of operations for the periods presented. Location and Amount of Gain or (Loss) Three Months Ended March 31, 2021 2020 Interest income - Taxable securities Interest income - Tax-exempt securities Interest income - Taxable securities Interest income - Tax-exempt securities (Dollars in thousands) Total interest income presented in the statement of operations in which the effects of fair value hedges are recorded $ 3,592 $ 1,695 $ 6,048 $ 48 Effects of fair value hedging relationships Interest rate contracts: Hedged items $ (1,072) $ (743) $ — $ — Derivatives designated as hedging instruments 1,053 743 — — Amount excluded from effectiveness testing recognized in earnings based on amortization approach — (25) — —
Schedule of Effects of Derivatives in Cash Flow and Fair Value Hedging Relationships on Accumulated Other Comprehensive Income (Loss)	The following table summarizes the effects of derivatives in cash flow and fair value hedging relationships designated as hedging instruments on the Company’s OCI and consolidated statements of operations for the periods presented. Amount of Gain (Loss) Location of Gain (Loss) Amount of Gain (Loss) Three Months Ended Three Months Ended 2021 2020 2021 2020 (Dollars in thousands) Derivatives designated as hedging instruments: Cash flow hedge interest rate floor $ (1,450) $ 6,096 Interest income - Other interest earning assets $ 136 $ 125 Cash flow hedge interest rate floor (5,800) 17,666 Interest income - Taxable securities 1,052 117 Cash flow hedge interest rate cap — (280) Interest expense - Subordinated debentures (99) (55) Fair value hedge interest rate cap (1) 375 — ________________________ (1) Represents amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded in other comprehensive income.

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	Comparison of the federal statutory income tax rates to the Company’s effective income tax rates for the periods presented are as follows: Three Months Ended March 31, 2021 2020 Amount Rate Amount Rate (Dollars in thousands) Statutory federal tax $ 2,415 21.0 % $ 1,295 21.0 % State tax, net of federal benefit (451) (3.9) % 494 8.0 % Tax credits (41) (0.4) % (56) (0.9) % Tax-exempt income (347) (3.0) % — — Excess tax benefit from stock-based compensation (3,003) (26.1) % — — Other items, net 216 1.9 % 41 0.7 % Actual tax (benefit) expense $ (1,211) (10.5) % $ 1,774 28.8 %

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Off-Balance Sheet Items	The Company’s commitments associated with outstanding letters of credit and commitments to extend credit expiring by period as of the date indicated are summarized below. Since commitments associated with letters of credit and commitments to extend credit may expire unused, the amounts shown do not necessarily reflect the actual future cash funding requirements. March 31, December 31, (Dollars in thousands) Unfunded lines of credit $ 119,931 $ 49,487 Letters of credit 133 133 Total credit extension commitments $ 120,064 $ 49,620

Stock-based Compensation (Table

Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Stock Option Activity	A summary of stock option activity as of March 31, 2021 and changes during the three months ended March 31, 2021 is presented below: Number of Weighted Weighted Average Remaining Contractual Life (in years) Aggregate Intrinsic Value (in thousands) Outstanding at January 1, 2021 595,303 $ 8.01 Granted 18,585 127.56 Exercised (159,122) 4.76 Forfeited or expired (2,272) 16.09 Outstanding at March 31, 2021 452,494 $ 14.03 4.6 years $ 57,984 Exercisable at March 31, 2021 292,311 $ 6.10 2.4 years $ 39,775 Vested or Expected to Vest at March 31, 2021 436,078 $ 13.49 4.5 years $ 56,113
Schedule of Status of Nonvested Restricted Stock Unit Awards and Changes	A summary of the status of the Company’s nonvested restricted stock unit awards as of March 31, 2021, and changes during the three months ended March 31, 2021, is presented below: Number of Shares Weighted-Average Nonvested at January 1, 2021 58,690 $ 15.61 Granted 25,722 $ 127.56 Vested (294) $ 14.89 Forfeited (849) $ 26.33 Nonvested at March 31, 2021 83,269 $ 50.08

Regulatory Capital (Tables)

Regulatory Capital (Tables)	3 Months Ended
	Mar. 31, 2021
Regulated Operations [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	Actual capital amounts and ratios for the Company and the Bank as of March 31, 2021 and December 31, 2020, are presented in the following tables: Actual Minimum capital adequacy (1) To be well Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) March 31, 2021 The Company Tier 1 leverage ratio $ 698,604 9.68 % $ 288,754 4.00 % N/A N/A Common equity tier 1 capital ratio 683,104 53.03 % 57,967 4.50 % N/A N/A Tier 1 risk-based capital ratio 698,604 54.23 % 77,289 6.00 % N/A N/A Total risk-based capital ratio 705,820 54.79 % 103,052 8.00 % N/A N/A The Bank Tier 1 leverage ratio 685,463 9.50 % 288,744 4.00 % $ 360,930 5.00 % Common equity tier 1 capital ratio 685,463 53.24 % 57,934 4.50 % 83,682 6.50 % Tier 1 risk-based capital ratio 685,463 53.24 % 77,245 6.00 % 102,994 8.00 % Total risk-based capital ratio 692,679 53.80 % 102,994 8.00 % 128,742 10.00 % Actual Minimum capital adequacy (1) To be well Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2020 The Company Tier 1 leverage ratio $ 263,763 8.29 % $ 127,338 4.00 % N/A N/A Common equity tier 1 capital ratio 248,263 21.53 % 51,882 4.50 % N/A N/A Tier 1 risk-based capital ratio 263,763 22.88 % 69,176 6.00 % N/A N/A Total risk-based capital ratio 270,803 23.49 % 92,234 8.00 % N/A N/A The Bank Tier 1 leverage ratio 261,791 8.22 % 127,344 4.00 % $ 159,180 5.00 % Common equity tier 1 capital ratio 261,791 22.71 % 51,869 4.50 % 74,923 6.50 % Tier 1 risk-based capital ratio 261,791 22.71 % 69,159 6.00 % 92,212 8.00 % Total risk-based capital ratio 268,831 23.32 % 92,212 8.00 % 115,265 10.00 % ________________________ (1) Minimum capital adequacy for common equity tier 1 capital ratio, tier 1 risk-based capital ratio and total risk-based capital ratio excludes the capital conservation buffer.

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	As of March 31, 2021 and December 31, 2020, assets and liabilities measured at fair value on a recurring basis are as follows: Fair Value Measurements Using Quoted Prices Significant Other Significant Level 1 Level 2 Level 3 Total (Dollars in thousands) March 31, 2021 Assets Trading securities $ 1,990 $ — $ — $ 1,990 Securities available-for-sale — 1,717,418 — 1,717,418 Derivative assets — 34,442 — 34,442 $ 1,990 $ 1,751,860 $ — $ 1,753,850 Fair Value Measurements Using Quoted Prices Significant Other Significant Level 1 Level 2 Level 3 Total (Dollars in thousands) December 31, 2020 Assets Securities available-for-sale $ — $ 939,015 $ — $ 939,015 Derivative assets — 31,104 — 31,104 $ — $ 970,119 $ — $ 970,119
Schedule of Assets Measured at Fair Value on Non-Recurring Basis	As of March 31, 2021 and December 31, 2020, assets measured at fair value on a non-recurring basis are summarized as follows: Fair Value Measurements Using Quoted Prices Significant Other Significant Level 1 Level 2 Level 3 Total (Dollars in thousands) March 31, 2021 Assets Impaired loans: Reverse mortgage $ — $ — $ 69 $ 69 December 31, 2020 Assets Impaired loans: Reverse mortgage $ — $ — $ 317 $ 317
Schedule of Fair Value Measurement Inputs and Valuation Techniques	The following table presents the valuation methodology and unobservable inputs for Level 3 assets measured at fair value on a nonrecurring basis as of the date indicated: Fair Value Valuation Technique(s) Significant Range Weighted Average (1) (Dollars in thousands) March 31, 2021 Collateral-dependent impaired loans $ 69 Market comparable properties Marketability discount 10.0 % 10.0 % Selling cost 8.0 % 8.0 % December 31, 2020 Collateral-dependent impaired loans $ 317 Market comparable properties Marketability discount 10.0 % 10.0 % Selling cost 8.0 % 8.0 % ________________________ (1) Unobservable inputs were weighted by the relative fair value of the instruments.
Schedule of Fair Value by Balance Sheet Grouping	The following tables present information about the Company’s assets and liabilities that are not measured at fair value in the consolidated statements of financial condition as of the dates presented: Carrying Fair Value Measurements Using Level 1 Level 2 Level 3 Total (Dollars in thousands) March 31, 2021 Financial assets: Cash and due from banks $ 16,422 $ 16,422 $ — $ — $ 16,422 Interest earning deposits 4,315,100 4,315,100 — — 4,315,100 Loans held-for-sale 897,227 — 897,227 — 897,227 Loans held-for-investment, net 728,390 — — 732,754 732,754 Accrued interest receivable 9,432 119 2,797 6,516 9,432 Financial liabilities: Deposits $ 7,002,371 $ — $ 7,269,900 $ — $ 7,269,900 Subordinated debentures, net 15,834 — 15,333 — 15,333 Accrued interest payable 107 — 107 — 107 Carrying Fair Value Measurements Using Level 1 Level 2 Level 3 Total (Dollars in thousands) December 31, 2020 Financial assets: Cash and due from banks $ 16,405 $ 16,405 $ — $ — $ 16,405 Interest earning deposits 2,945,682 2,945,682 — — 2,945,682 Loans held-for-sale 865,961 — 865,961 — 865,961 Loans held-for-investment, net 746,751 — — 751,165 751,165 Accrued interest receivable 8,698 8 2,630 6,060 8,698 Financial liabilities: Deposits $ 5,248,026 $ — $ 5,458,900 $ — $ 5,458,900 Subordinated debentures, net 15,831 — 15,231 — 15,231 Accrued interest payable 260 — 260 — 260

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings Per Share	The computation of basic and diluted earnings per share is shown below. Three Months Ended 2021 2020 (In thousands, except per share data) Basic Net income $ 12,710 $ 4,393 Weighted average common shares outstanding 22,504 18,668 Basic earnings per common share $ 0.56 $ 0.24 Diluted Net income $ 12,710 $ 4,393 Weighted average common shares outstanding for basic earnings per common share 22,504 18,668 Add: Dilutive effects of stock-based awards 506 449 Average shares and dilutive potential common shares 23,010 19,117 Dilutive earnings per common share $ 0.55 $ 0.23

Nature of Business and Summar_3

Nature of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	Mar. 09, 2021	Jan. 26, 2021	Mar. 31, 2021	Mar. 31, 2020
Class of Stock [Line Items]
Aggregate net proceeds of stock offering			$ 423,540,000	$ 0
Follow-on Offering, including Over-Allotment Option | Class A Common Stock
Class of Stock [Line Items]
Stock sold during period (shares)		4,563,493
Offering price per share (USD per share)		$ 63
Aggregate gross proceeds of stock offering		$ 287,500,000
Aggregate net proceeds of stock offering		$ 272,400,000
Over-Allotment Option | Class A Common Stock
Class of Stock [Line Items]
Stock sold during period (shares)		595,238
ATM Program | Class A Common Stock
Class of Stock [Line Items]
Stock sold during period (shares)			1,297,365
Offering price per share (USD per share)			$ 118.39
Aggregate gross proceeds of stock offering			$ 153,600,000
Aggregate net proceeds of stock offering			$ 151,100,000
Aggregate gross sales price	$ 300,000,000

Securities - Narrative (Details

Securities - Narrative (Details)	3 Months Ended
	Mar. 31, 2021USD ($)security	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)security
Investments, Debt and Equity Securities [Abstract]
Trading securities	$ 1,990,000		$ 0
Investment securities pledged for borrowings	0		0
Fair value of securities issued in an amount greater than 10% of shareholders' equity	0
Gross unrealized losses on securities in a continuous unrealized loss position	$ (5,151,000)		$ (3,758,000)
Number of securities whose estimated fair value declined | security	51		30
Decline in fair value from amortized cost (as a percent)	0.58%		0.86%
Proceeds from sale of securities available-for-sale	$ 0	$ 14,016,000
Realized gain on available-for-sale securities		1,200,000
Realized loss on available-for-sale securities		0
Credit losses recognized in earnings	$ 0	$ 0

Securities - Reconciliation fro

Securities - Reconciliation from Amortized Cost to Estimated Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Available-for-sale securities
Amortized Cost	$ 1,690,588	$ 898,751
Gross Unrealized Gains	31,981	44,022
Gross Unrealized Losses	(5,151)	(3,758)
Fair Value	1,717,418	939,015
Government agency mortgage-backed securities, Residential
Available-for-sale securities
Amortized Cost	152,253	5,701
Gross Unrealized Gains	167	18
Gross Unrealized Losses	(1,202)	(55)
Fair Value	151,218	5,664
Government agency collateralized mortgage obligation, Residential
Available-for-sale securities
Amortized Cost	686,030	197,978
Gross Unrealized Gains	194	371
Gross Unrealized Losses	(2,844)	(298)
Fair Value	683,380	198,051
Private-label collateralized mortgage obligation, Residential
Available-for-sale securities
Amortized Cost	18,688	20,544
Gross Unrealized Gains	530	399
Gross Unrealized Losses	(170)	(256)
Fair Value	19,048	20,687
Government agency mortgage-backed securities, Commercial
Available-for-sale securities
Amortized Cost	49,135
Gross Unrealized Gains	2
Gross Unrealized Losses	(24)
Fair Value	49,113
Government agency collateralized mortgage obligation, Commercial
Available-for-sale securities
Amortized Cost	42,435
Gross Unrealized Gains	0
Gross Unrealized Losses	(35)
Fair Value	42,400
Private-label collateralized mortgage obligation, Commercial
Available-for-sale securities
Amortized Cost	163,993	164,214
Gross Unrealized Gains	10,504	18,322
Gross Unrealized Losses	0	0
Fair Value	174,497	182,536
Tax-exempt
Available-for-sale securities
Amortized Cost	318,132	246,159
Gross Unrealized Gains	18,801	24,200
Gross Unrealized Losses	(13)	0
Fair Value	336,920	270,359
Taxable
Available-for-sale securities
Amortized Cost	14,206	15,307
Gross Unrealized Gains	1,485	695
Gross Unrealized Losses	(48)	0
Fair Value	15,643	16,002
Government sponsored student loan pools
Available-for-sale securities
Amortized Cost	245,716	248,848
Gross Unrealized Gains	298	17
Gross Unrealized Losses	(815)	(3,149)
Fair Value	$ 245,199	$ 245,716

Securities - Securities in Unre

Securities - Securities in Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value
Less than 12 Months	$ 703,741	$ 126,367
12 Months or More	181,607	307,751
Total	885,348	434,118
Unrealized Losses
Less than 12 Months	(4,101)	(234)
12 Months or More	(1,050)	(3,524)
Total	(5,151)	(3,758)
Government agency mortgage-backed securities, Residential
Fair Value
Less than 12 Months	102,614	5,165
12 Months or More	0	0
Total	102,614	5,165
Unrealized Losses
Less than 12 Months	(1,202)	(55)
12 Months or More	0	0
Total	(1,202)	(55)
Government agency collateralized mortgage obligation, Residential
Fair Value
Less than 12 Months	478,392	120,912
12 Months or More	52,294	56,976
Total	530,686	177,888
Unrealized Losses
Less than 12 Months	(2,699)	(172)
12 Months or More	(145)	(126)
Total	(2,844)	(298)
Private-label collateralized mortgage obligation, Residential
Fair Value
Less than 12 Months	0	290
12 Months or More	8,609	9,950
Total	8,609	10,240
Unrealized Losses
Less than 12 Months	0	(7)
12 Months or More	(170)	(249)
Total	(170)	(256)
Government agency mortgage-backed securities, Commercial
Fair Value
Less than 12 Months	18,203
12 Months or More	0
Total	18,203
Unrealized Losses
Less than 12 Months	(24)
12 Months or More	0
Total	(24)
Government agency collateralized mortgage obligation, Commercial
Fair Value
Less than 12 Months	30,900
12 Months or More	0
Total	30,900
Unrealized Losses
Less than 12 Months	(35)
12 Months or More	0
Total	(35)
Tax-exempt municipal bonds
Fair Value
Less than 12 Months	23,800
12 Months or More	0
Total	23,800
Unrealized Losses
Less than 12 Months	(13)
12 Months or More	0
Total	(13)
Taxable municipal bonds
Fair Value
Less than 12 Months	5,767
12 Months or More	0
Total	5,767
Unrealized Losses
Less than 12 Months	(48)
12 Months or More	0
Total	(48)
Government sponsored student loan pools
Fair Value
Less than 12 Months	44,065	0
12 Months or More	120,704	240,825
Total	164,769	240,825
Unrealized Losses
Less than 12 Months	(80)	0
12 Months or More	(735)	(3,149)
Total	$ (815)	$ (3,149)

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Amortized Cost
Within one year	$ 0	$ 0
After one year through five years	0	0
After five years through ten years	56,363	14,021
After ten years	1,634,225	884,730
Total	1,690,588	898,751
Fair Value
Within one year	0	0
After one year through five years	0	0
After five years through ten years	57,091	15,694
After ten years	1,660,327	923,321
Total	$ 1,717,418	$ 939,015

Loans - Narrative (Details)

Loans - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)contract	Mar. 31, 2020USD ($)contract	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans held-for-investment	$ 733,589,000		$ 751,461,000
Gross loans	735,306,000		753,667,000
Accrued interest on loans held-for-investment	3,100,000		2,700,000
Deferred fees, net	1,717,000		2,206,000
Allowance for loan losses	(6,916,000)	$ (6,558,000)	(6,916,000)	$ (6,191,000)
Investment in TDRs	1,500,000		1,500,000
Allowance allocated to investment in TDRs	$ 11,000		11,000
Loans modified as TDRs | contract	0	0
Loans modified as TDRs, subsequent default | contract	0	0
Provision for loan loss for TDRs that subsequently defaulted	$ 0	$ 0
Related party loans	5,500,000		5,000,000
New loans advances	2,000,000
Decrease in balance of related party loans due to principal payments received	1,500,000
Payment Deferral | COVID-19 Related Modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans still under modification	$ 65,300,000
Loan balance of loans still under modification	8.90%
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans held-for-investment	$ 539,000,000		$ 574,500,000
Real Estate | California | Financing Receivable | Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk (as a percent)	64.70%		68.80%
Real Estate | Arizona | Financing Receivable | Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk (as a percent)	4.40%		5.90%
Commercial | Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans held-for-investment	$ 287,411,000		$ 301,901,000
Allowance for loan losses	(3,251,000)	(2,957,000)	(1,810,000)	(2,791,000)
Commercial | Payment Deferral | COVID-19 Related Modification | Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans still under modification	40,000,000
SEN Leverage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans held-for-investment	117,300,000		77,200,000
Mortgage warehouse | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans held-for-investment	76,014,000		97,903,000
Proceeds from sale of loans receivable	800,000	21,700,000
Gross loans	973,200,000		963,900,000
Allowance for loan losses	$ (332,000)	$ (218,000)	$ (423,000)	$ (250,000)

Loans - Summary of Loans (Detai

Loans - Summary of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	$ 733,589	$ 751,461
Deferred fees, net	1,717	2,206
Total loans held-for-investment	735,306	753,667
Allowance for loan losses	(6,916)	(6,916)	$ (6,558)	$ (6,191)
Total loans held-for-investment, net	728,390	746,751
Total loans held-for-sale	897,227	865,961
Residential | Mortgage warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	76,014	97,903
Total loans held-for-investment	973,200	963,900
Allowance for loan losses	(332)	(423)	(218)	(250)
Reverse mortgage and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	1,346	1,495
Allowance for loan losses	(18)	(39)	(39)	(38)
Real estate loans | Residential | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	171,045	187,855
Allowance for loan losses	(1,634)	(1,245)	(1,971)	(2,051)
Real estate loans | Residential | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	74,003	77,126
Allowance for loan losses	(828)	(878)	(689)	(653)
Real estate loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	287,411	301,901
Allowance for loan losses	(3,251)	(1,810)	(2,957)	(2,791)
Real estate loans | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	5,172	6,272
Allowance for loan losses	(493)	(590)	(258)	(96)
Commercial and industrial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans held-for-investment	118,598	78,909
Allowance for loan losses	$ (360)	$ (1,931)	$ (426)	$ (312)

Loans - Allowance (Details)

Loans - Allowance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 6,916	$ 6,191
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	0	367
Ending balance	6,916	6,558
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			$ 19	$ 40
General portfolio allocation			6,897	6,876
Total allowance for loan losses	6,916	6,558	6,916	6,916
Specifically evaluated			16,084	16,645
Collectively evaluated			717,505	734,816
Total gross loans held-for-investment			733,589	751,461
Residential | One-to-four family | Real estate loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,245	2,051
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	389	(80)
Ending balance	1,634	1,971
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			12	11
General portfolio allocation			1,622	1,234
Total allowance for loan losses	1,245	1,971	1,634	1,245
Specifically evaluated			5,141	5,780
Collectively evaluated			165,904	182,075
Total gross loans held-for-investment			171,045	187,855
Residential | Multi-family | Real estate loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	878	653
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	(50)	36
Ending balance	828	689
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			0	0
General portfolio allocation			828	878
Total allowance for loan losses	878	689	828	878
Specifically evaluated			0	0
Collectively evaluated			74,003	77,126
Total gross loans held-for-investment			74,003	77,126
Residential | Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	423	250
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	(91)	(32)
Ending balance	332	218
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			0	0
General portfolio allocation			332	423
Total allowance for loan losses	332	218	332	423
Specifically evaluated			0	0
Collectively evaluated			76,014	97,903
Total gross loans held-for-investment			76,014	97,903
Commercial | Real estate loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,810	2,791
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	1,441	166
Ending balance	3,251	2,957
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			0	0
General portfolio allocation			3,251	1,810
Total allowance for loan losses	1,810	2,957	3,251	1,810
Specifically evaluated			9,830	9,722
Collectively evaluated			277,581	292,179
Total gross loans held-for-investment			287,411	301,901
Commercial | Construction | Real estate loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	590	96
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	(97)	162
Ending balance	493	258
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			0	0
General portfolio allocation			493	590
Total allowance for loan losses	493	258	493	590
Specifically evaluated			0	0
Collectively evaluated			5,172	6,272
Total gross loans held-for-investment			5,172	6,272
Commercial and industrial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,931	312
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	(1,571)	114
Ending balance	360	426
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			0	0
General portfolio allocation			360	1,931
Total allowance for loan losses	1,931	426	360	1,931
Specifically evaluated			237	274
Collectively evaluated			118,361	78,635
Total gross loans held-for-investment			118,598	78,909
Reverse mortgage and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	39	38
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	(21)	1
Ending balance	18	39
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Specifically evaluated impaired loans			7	29
General portfolio allocation			11	10
Total allowance for loan losses	$ 39	$ 39	18	39
Specifically evaluated			876	869
Collectively evaluated			470	626
Total gross loans held-for-investment			$ 1,346	$ 1,495

Loans - Impaired Loans (Details

Loans - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Unpaid Principal Balance	$ 16,610		$ 16,952
Impaired loans with no related allowance - Recorded Investment	15,944		16,235
Impaired loans with related allowance - Unpaid Principal Balance	140		410
Impaired loans with related allowance - Recorded Investment	140		410
Impaired loans - Unpaid Principal Balance	16,750		17,362
Impaired loans - Recorded Investment	16,084		16,645
Impaired loans - Related Allowance	19		40
Impaired loans with no related allowance - Average Recorded Investment	15,639	$ 8,512
Impaired loans with no related allowance - Interest Income Recognized	210	89
Impaired loans with related allowance - Average Recorded Investment	322	404
Impaired loans with related allowance - Interest Income Recognized	1	1
Impaired loans - Average Recorded Investment	15,961	8,916
Impaired loans - Interest Income Recognized	211	90
Reverse mortgage and other
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Unpaid Principal Balance	801		523
Impaired loans with no related allowance - Recorded Investment	800		523
Impaired loans with related allowance - Unpaid Principal Balance	76		346
Impaired loans with related allowance - Recorded Investment	76		346
Impaired loans - Related Allowance	7		29
Impaired loans with no related allowance - Average Recorded Investment	616	511
Impaired loans with no related allowance - Interest Income Recognized	0	0
Impaired loans with related allowance - Average Recorded Investment	258	338
Impaired loans with related allowance - Interest Income Recognized	0	0
Real estate loans | Residential | One-to-four family
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Unpaid Principal Balance	5,742		6,432
Impaired loans with no related allowance - Recorded Investment	5,077		5,716
Impaired loans with related allowance - Unpaid Principal Balance	64		64
Impaired loans with related allowance - Recorded Investment	64		64
Impaired loans - Related Allowance	12		11
Impaired loans with no related allowance - Average Recorded Investment	4,979	3,731
Impaired loans with no related allowance - Interest Income Recognized	77	26
Impaired loans with related allowance - Average Recorded Investment	64	66
Impaired loans with related allowance - Interest Income Recognized	1	1
Real estate loans | Commercial
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Unpaid Principal Balance	9,830		9,723
Impaired loans with no related allowance - Recorded Investment	9,830		9,722
Impaired loans with no related allowance - Average Recorded Investment	9,795	1,941
Impaired loans with no related allowance - Interest Income Recognized	128	21
Commercial and industrial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance - Unpaid Principal Balance	237		274
Impaired loans with no related allowance - Recorded Investment	237		$ 274
Impaired loans with no related allowance - Average Recorded Investment	249	2,329
Impaired loans with no related allowance - Interest Income Recognized	$ 5	$ 42

Loans - Aging Analysis (Details

Loans - Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	$ 7,794	$ 5,103
Loans Receivable, Current	725,795	746,358
Total gross loans held-for-investment	733,589	751,461
Loans Receivable, Nonaccruing	5,333	4,982
Loans Receivable > 89 Days and Accruing	0	0
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	2,773	1,198
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	2,187	85
Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	2,834	3,820
Residential | Mortgage warehouse
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Loans Receivable, Current	76,014	97,903
Total gross loans held-for-investment	76,014	97,903
Loans Receivable, Nonaccruing	0	0
Loans Receivable > 89 Days and Accruing	0	0
Residential | Mortgage warehouse | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Residential | Mortgage warehouse | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Residential | Mortgage warehouse | Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Reverse mortgage and other
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Loans Receivable, Current	1,346	1,495
Total gross loans held-for-investment	1,346	1,495
Loans Receivable, Nonaccruing	876	869
Loans Receivable > 89 Days and Accruing	0	0
Reverse mortgage and other | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Reverse mortgage and other | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Reverse mortgage and other | Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Residential | One-to-four family
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	7,794	4,897
Loans Receivable, Current	163,251	182,958
Total gross loans held-for-investment	171,045	187,855
Loans Receivable, Nonaccruing	4,457	4,113
Loans Receivable > 89 Days and Accruing	0	0
Real estate loans | Residential | One-to-four family | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	2,773	992
Real estate loans | Residential | One-to-four family | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	2,187	85
Real estate loans | Residential | One-to-four family | Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	2,834	3,820
Real estate loans | Residential | Multi-family
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	206
Loans Receivable, Current	74,003	76,920
Total gross loans held-for-investment	74,003	77,126
Loans Receivable, Nonaccruing	0	0
Loans Receivable > 89 Days and Accruing	0	0
Real estate loans | Residential | Multi-family | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	206
Real estate loans | Residential | Multi-family | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Residential | Multi-family | Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Loans Receivable, Current	287,411	301,901
Total gross loans held-for-investment	287,411	301,901
Loans Receivable, Nonaccruing	0	0
Loans Receivable > 89 Days and Accruing	0	0
Real estate loans | Commercial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Commercial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Commercial | Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Commercial | Construction
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Loans Receivable, Current	5,172	6,272
Total gross loans held-for-investment	5,172	6,272
Loans Receivable, Nonaccruing	0	0
Loans Receivable > 89 Days and Accruing	0	0
Real estate loans | Commercial | Construction | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Commercial | Construction | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Real estate loans | Commercial | Construction | Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Commercial and industrial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Loans Receivable, Current	118,598	78,909
Total gross loans held-for-investment	118,598	78,909
Loans Receivable, Nonaccruing	0	0
Loans Receivable > 89 Days and Accruing	0	0
Commercial and industrial | Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Commercial and industrial | Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	0	0
Commercial and industrial | Commercial and industrial | Greater than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans Receivable, Past Due	$ 0	$ 0

Loans - Credit Quality Indicato

Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	$ 733,589	$ 751,461
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	702,468	729,329
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	17,677	9,109
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	13,444	13,023
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Residential | Mortgage warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	76,014	97,903
Residential | Mortgage warehouse | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	76,014	97,903
Residential | Mortgage warehouse | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Residential | Mortgage warehouse | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Residential | Mortgage warehouse | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Reverse mortgage and other
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	1,346	1,495
Reverse mortgage and other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	470	626
Reverse mortgage and other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Reverse mortgage and other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	876	869
Reverse mortgage and other | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Residential | One-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	171,045	187,855
Real estate loans | Residential | One-to-four family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	163,313	180,458
Real estate loans | Residential | One-to-four family | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	3,275	3,284
Real estate loans | Residential | One-to-four family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	4,457	4,113
Real estate loans | Residential | One-to-four family | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Residential | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	74,003	77,126
Real estate loans | Residential | Multi-family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	74,003	77,126
Real estate loans | Residential | Multi-family | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Residential | Multi-family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Residential | Multi-family | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	287,411	301,901
Real estate loans | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	265,135	288,309
Real estate loans | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	14,402	5,825
Real estate loans | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	7,874	7,767
Real estate loans | Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	5,172	6,272
Real estate loans | Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	5,172	6,272
Real estate loans | Commercial | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Commercial | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Real estate loans | Commercial | Construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Commercial and industrial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	118,598	78,909
Commercial and industrial | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	118,361	78,635
Commercial and industrial | Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	0	0
Commercial and industrial | Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	237	274
Commercial and industrial | Commercial and industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans held-for-investment	$ 0	$ 0

FHLB Advances and Other Borro_3

FHLB Advances and Other Borrowings - FHLB Advances (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
Amount outstanding at period-end	$ 0	$ 0
Weighted average interest rate at period-end (as a percent)	0.00%	0.00%
Maximum month-end balance during the period	$ 0	$ 360,000
Average balance outstanding during the period	$ 0	$ 68,522
Weighted average interest rate during the period (as a percent)	0.00%	0.50%

FHLB Advances and Other Borro_4

FHLB Advances and Other Borrowings - Narrative (Details)	Mar. 31, 2021USD ($)bank	Dec. 31, 2020USD ($)
Short-term Debt [Line Items]
FHLB advances, maximum borrowing capacity in proportion to assets (as a percent)	35.00%	35.00%
FHLB advances, collateral pledged	$ 1,400,000,000	$ 1,500,000,000
FHLB advances, unused borrowing capacity	866,700,000	893,000,000
Federal funds purchased, maximum borrowing capacity	$ 68,000,000
Number of correspondent banks | bank	3
Federal funds purchased, amount outstanding	$ 0	0
Federal Reserve Bank Advances
Short-term Debt [Line Items]
FRB advances, collateral pledged	6,200,000	6,300,000
FRB advances, current borrowing capacity	5,100,000	4,800,000
FRB advances, amount outstanding	$ 0	$ 0

Subordinated Debentures, Net -

Subordinated Debentures, Net - Narrative (Details) - Subordinated Debentures - USD ($)	Jul. 31, 2001	Mar. 31, 2021	Dec. 31, 2020	Jan. 31, 2005
Debt Instrument [Line Items]
Interest payments, deferment period		5 years
Outstanding principal balance		$ 15,800,000	$ 15,800,000
Unamortized debt issuance costs		$ 100,000	$ 100,000
Trust One
Debt Instrument [Line Items]
Minority interest (as a percent)		3.00%
Trust Two
Debt Instrument [Line Items]
Minority interest (as a percent)		3.00%
2001 Subordinated Debentures Maturing July 25, 2031 | Trust One
Debt Instrument [Line Items]
Principal amount	$ 12,500,000
Effective interest rate (as a percent)		3.98%
Redemption price (as a percent)		100.00%
Debt Instrument, Term	6 months
2001 Subordinated Debentures Maturing July 25, 2031 | Trust One | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate (as a percent)	375.00%	0.23%
2005 Subordinated Debentures Maturing March 15, 2035 | Trust Two
Debt Instrument [Line Items]
Principal amount				$ 3,000,000
Redemption price (as a percent)		100.00%
Debt Instrument, Term	3 months
2005 Subordinated Debentures Maturing March 15, 2035 | Trust Two | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate (as a percent)		0.18%		185.00%
Effective interest rate (as a percent)		2.03%

Derivative and Hedging Activi_3

Derivative and Hedging Activities - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)instrument	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)instrument	Dec. 31, 2012USD ($)	Dec. 31, 2019USD ($)instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash collateral posted by the counterparty	$ 0.3
Estimated net derivative gain included in OCI to be reclassified into earnings	$ 4.8
Estimated time for net derivative gain included in OCI to be reclassified into earnings	12 months
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments | instrument			2
Derivative, notional amount			$ 14.3
Interest Rate Floor
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments | instrument					20
Derivative, notional amount					$ 400
Derivative, notional amount sold		$ 200
Upfront fee paid to counterparty			$ 20.8
Proceeds from sale of derivative		13
Gain on sale of derivatives		$ 8.4
Recognition period for net gain on sale of derivative		4 years 1 month 6 days
Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments | instrument	13
Derivative, notional amount	$ 205
Upfront fee paid to counterparty	$ 9.5			$ 2.5
Cap Agreement Expiring July 25, 2022 | Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount				12.5
Cap Agreement Expiring March 15, 2022 | Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount				$ 3
Fed Funds Rate | Interest Rate Floor
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Floor interest rate (as a percent)	2.50%
Fed Funds Rate | Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Floor interest rate (as a percent)	2.00%
London Interbank Offered Rate (LIBOR) | Interest Rate Floor
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Floor interest rate (as a percent)	2.25%
London Interbank Offered Rate (LIBOR) | Cap Agreement Expiring July 25, 2022 | Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cap interest rate (as a percent)				0.75%
London Interbank Offered Rate (LIBOR) | Cap Agreement Expiring March 15, 2022 | Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cap interest rate (as a percent)				0.50%

Derivative and Hedging Activi_4

Derivative and Hedging Activities - Fair Value by Balance Sheet Location (Details) - Derivative assets - Derivatives designated as hedging instruments - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Interest Rate Floor | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	$ 22,451	$ 30,766
Interest Rate Cap | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Interest Rate Cap | Fair Value Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	10,581	0
Interest Rate Swap | Fair Value Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	$ 1,410	$ 338

Derivative and Hedging Activi_5

Derivative and Hedging Activities - Cumulative Amount of Fair Value Hedging Adjustments (Details) - Securities available-for-sale - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying Amount of the Hedged Asset (Liability)	$ 204,627	$ 15,367
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of Hedged Assets/(Liabilities)	$ (2,153)	$ (278)

Derivative and Hedging Activi_6

Derivative and Hedging Activities - Amount of Gain (Loss) Recognized in OCI and Reclassified into Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI	$ (7,460)	$ 23,466
Interest income - Other interest earning assets	1,279	724
Interest income - Taxable securities	3,592	6,048
Interest expense - Subordinated debentures	(245)	(306)
Derivatives designated as hedging instruments | Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest income - Other interest earning assets	136	125
Interest income - Taxable securities	1,052	117
Interest expense - Subordinated debentures	(99)	(55)
Derivatives designated as hedging instruments | Cash flow hedge interest rate floor | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI	(1,450)	6,096
Derivatives designated as hedging instruments | Cash flow hedge interest rate floor | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI	(5,800)	17,666
Derivatives designated as hedging instruments | Interest Rate Cap | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI	0	(280)
Derivatives designated as hedging instruments | Interest Rate Cap | Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI	$ 375	$ 0

Derivative and Hedging Activi_7

Derivative and Hedging Activities - Effect of Fair Value Hedge Accounting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest income - Taxable securities	$ 3,592	$ 6,048
Interest income - Tax-exempt securities	1,695	48
Interest Rate Cap | Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	(25)	0
Interest Rate Cap | Fair Value Hedging | Interest income - Taxable securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged items	(1,072)	0
Interest Rate Cap | Fair Value Hedging | Interest income - Tax-exempt securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged items	(743)	0
Derivatives designated as hedging instruments | Interest Rate Cap | Fair Value Hedging | Interest income - Taxable securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives designated as hedging instruments	1,053	0
Derivatives designated as hedging instruments | Interest Rate Cap | Fair Value Hedging | Interest income - Tax-exempt securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives designated as hedging instruments	$ 743	$ 0

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Amount
Statutory federal tax	$ 2,415	$ 1,295
State tax, net of federal benefit	(451)	494
Tax credits	(41)	(56)
Tax-exempt income	(347)	0
Excess tax benefit from stock-based compensation	(3,003)	0
Other items, net	216	41
Actual tax (benefit) expense	$ (1,211)	$ 1,774
Rate
Statutory federal tax (as a percent)	21.00%	21.00%
State tax, net of federal benefit (as a percent)	(3.90%)	8.00%
Tax credits (as a percent)	(0.40%)	(0.90%)
Tax-exempt income (as a percent)	(3.00%)	0.00%
Excess tax benefit from stock-based compensation (as a percent)	(26.10%)	0.00%
Other items, net (as a percent)	1.90%	0.70%
Actual tax (benefit) expense (as a percent)	(10.50%)	28.80%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (1,211)	$ 1,774
Effective tax rate (as a percent)	(10.50%)	28.80%
Deferred tax liabilities	$ 10,200		$ 15,400

Commitments and Contingencies -

Commitments and Contingencies - Off-Balance Sheet Items (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Allowance for commitments	$ 300	$ 100
Total credit extension commitments	120,064	49,620
Unfunded lines of credit
Debt Instrument [Line Items]
Total credit extension commitments	119,931	49,487
Letters of credit
Debt Instrument [Line Items]
Total credit extension commitments	$ 133	$ 133

Stock-based Compensation - Narr

Stock-based Compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 300	$ 200
Unrecognized stock-based compensation expense related to stock options	$ 1,400
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period unrecognized expenses is expected to be recognized	2 years 9 months 18 days
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period unrecognized expenses is expected to be recognized	3 years
Unrecognized stock-based compensation expense	$ 3,200
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (shares)			1,596,753

Stock-based Compensation - Stoc

Stock-based Compensation - Stock Compensation Plans (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)$ / sharesshares
Number of Options
Outstanding at beginning of period (shares) | shares	595,303
Granted (shares) | shares	18,585
Exercised (shares) | shares	(159,122)
Forfeited or expired (shares) | shares	(2,272)
Outstanding at end of period (shares) | shares	452,494
Exercisable at end of period (shares) | shares	292,311
Vested or Expected to Vest at end of period (shares) | shares	436,078
Weighted Average Exercise Price
Outstanding at beginning of period (USD per share) | $ / shares	$ 8.01
Granted (USD per share) | $ / shares	127.56
Exercised (USD per share) | $ / shares	4.76
Forfeited or expired (USD per share) | $ / shares	16.09
Outstanding at end of period (USD per share) | $ / shares	14.03
Exercisable at end of period (USD per share) | $ / shares	6.10
Vested or Expected to Vest at end of period (USD per share) | $ / shares	$ 13.49
Weighted Average Remaining Contractual Life (in years)
Outstanding at end of period	4 years 7 months 6 days
Exercisable at end of period	2 years 4 months 24 days
Vested or Expected to Vest at end of period	4 years 6 months
Aggregate Intrinsic Value (in thousands)
Outstanding at end of period | $	$ 57,984
Exercisable at end of period | $	39,775
Vested or Expected to Vest at end of period | $	$ 56,113

Stock-based Compensation - Rest

Stock-based Compensation - Restricted Stock Units Activity (Details) - Restricted Stock Units	3 Months Ended
	Mar. 31, 2021$ / sharesshares
Number of Shares
Beginning balance (shares) | shares	58,690
Granted (shares) | shares	25,722
Vested (shares) | shares	(294)
Forfeited (shares) | shares	(849)
Ending balance (shares) | shares	83,269
Weighted-Average Grant Date Fair Value Per Share
Beginning balance (USD per share) | $ / shares	$ 15.61
Granted (USD per share) | $ / shares	127.56
Vested (USD per share) | $ / shares	14.89
Forfeited (USD per share) | $ / shares	26.33
Ending balance (USD per share) | $ / shares	$ 50.08

Regulatory Capital - Summary (D

Regulatory Capital - Summary (Details) $ in Thousands	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
The Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage ratio, amount	$ 698,604	$ 263,763
Tier 1 leverage ratio (as a percent)	0.0968	0.0829
Tier 1 leverage ratio, minimum capital adequacy, amount	$ 288,754	$ 127,338
Tier 1 leverage ratio, minimum capital adequacy (as a percent)	0.0400	0.0400
Common equity tier 1 capital ratio, amount	$ 683,104	$ 248,263
Common equity tier 1 capital ratio (as a percent)	0.5303	0.2153
Common equity tier 1 capital ratio, minimum capital adequacy, amount	$ 57,967	$ 51,882
Common equity tier 1 capital ratio, minimum capital adequacy (as a percent)	0.0450	0.0450
Tier 1 risk-based capital ratio, amount	$ 698,604	$ 263,763
Tier 1 risk-based capital ratio (as a percent)	0.5423	0.2288
Tier 1 risk-based capital ratio, minimum capital adequacy, amount	$ 77,289	$ 69,176
Tier 1 risk-based capital ratio, minimum capital adequacy (as a percent)	0.0600	0.0600
Total risk-based capital ratio, amount	$ 705,820	$ 270,803
Total risk-based capital ratio (as a percent)	0.5479	0.2349
Total risk-based capital ratio, minimum capital adequacy, amount	$ 103,052	$ 92,234
Total risk-based capital ratio, minimum capital adequacy (as a percent)	0.0800	0.0800
The Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage ratio, amount	$ 685,463	$ 261,791
Tier 1 leverage ratio (as a percent)	0.0950	0.0822
Tier 1 leverage ratio, minimum capital adequacy, amount	$ 288,744	$ 127,344
Tier 1 leverage ratio, minimum capital adequacy (as a percent)	0.0400	0.0400
Tier 1 leverage ratio, to be well capitalized, amount	$ 360,930	$ 159,180
Tier 1 leverage ratio, to be well capitalized (as a percent)	0.0500	0.0500
Common equity tier 1 capital ratio, amount	$ 685,463	$ 261,791
Common equity tier 1 capital ratio (as a percent)	0.5324	0.2271
Common equity tier 1 capital ratio, minimum capital adequacy, amount	$ 57,934	$ 51,869
Common equity tier 1 capital ratio, minimum capital adequacy (as a percent)	0.0450	0.0450
Common equity tier 1 capital ratio, to be well capitalized, amount	$ 83,682	$ 74,923
Common equity tier 1 capital ratio, to be well capitalized (as a percent)	6.50%	6.50%
Tier 1 risk-based capital ratio, amount	$ 685,463	$ 261,791
Tier 1 risk-based capital ratio (as a percent)	0.5324	0.2271
Tier 1 risk-based capital ratio, minimum capital adequacy, amount	$ 77,245	$ 69,159
Tier 1 risk-based capital ratio, minimum capital adequacy (as a percent)	0.0600	0.0600
Tier 1 risk-based capital ratio, to be well capitalized, amount	$ 102,994	$ 92,212
Tier 1 risk-based capital ratio, to be well capitalized (as a percent)	0.0800	0.0800
Total risk-based capital ratio, amount	$ 692,679	$ 268,831
Total risk-based capital ratio (as a percent)	0.5380	0.2332
Total risk-based capital ratio, minimum capital adequacy, amount	$ 102,994	$ 92,212
Total risk-based capital ratio, minimum capital adequacy (as a percent)	0.0800	0.0800
Total risk-based capital ratio, to be well capitalized, amount	$ 128,742	$ 115,265
Total risk-based capital ratio, to be well capitalized (as a percent)	0.1000	0.1000

Fair Value - Recurring Basis (D

Fair Value - Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Trading securities	$ 1,990	$ 0
Securities available-for-sale	1,717,418	939,015
Derivative assets	34,442	31,104
Recurring Basis
Assets
Trading securities	1,990
Securities available-for-sale	1,717,418	939,015
Derivative assets	34,442	31,104
Total	1,753,850	970,119
Recurring Basis | Level 1
Assets
Trading securities	1,990
Securities available-for-sale	0	0
Derivative assets	0	0
Total	1,990	0
Recurring Basis | Level 2
Assets
Trading securities	0
Securities available-for-sale	1,717,418	939,015
Derivative assets	34,442	31,104
Total	1,751,860	970,119
Recurring Basis | Level 3
Assets
Trading securities	0
Securities available-for-sale	0	0
Derivative assets	0	0
Total	$ 0	$ 0

Fair Value - Non-Recurring Basi

Fair Value - Non-Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Impaired loans	$ 732,754	$ 751,165
Level 1
Assets
Impaired loans	0	0
Level 2
Assets
Impaired loans	0	0
Level 3
Assets
Impaired loans	732,754	751,165
Level 3 | Reverse mortgage and other
Assets
Impaired loans	69	317
Non-recurring basis | Reverse mortgage and other
Assets
Impaired loans	69	317
Non-recurring basis | Level 1 | Reverse mortgage and other
Assets
Impaired loans	0	0
Non-recurring basis | Level 2 | Reverse mortgage and other
Assets
Impaired loans	0	0
Non-recurring basis | Level 3 | Reverse mortgage and other
Assets
Impaired loans	$ 69	$ 317

Fair Value - Valuation Methodol

Fair Value - Valuation Methodology and Unobservable Inputs (Details) $ in Thousands	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral-dependent impaired loans	$ 732,754	$ 751,165
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral-dependent impaired loans	$ 732,754	$ 751,165
Collateral-Dependent Impaired Loans | Level 3 | Selling cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (as a percent)	0.080	0.080
Collateral-Dependent Impaired Loans | Market comparable properties | Level 3 | Marketability discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (as a percent)	0.100	0.100
Collateral-Dependent Impaired Loans | Weighted Average | Level 3 | Selling cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (as a percent)	0.080	0.080
Collateral-Dependent Impaired Loans | Weighted Average | Market comparable properties | Level 3 | Marketability discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (as a percent)	0.100	0.100
Reverse mortgage and other | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral-dependent impaired loans	$ 69	$ 317

Fair Value - Fair Value by Bala

Fair Value - Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial assets:
Cash and due from banks, Carrying Amount	$ 16,422	$ 16,405
Cash and due from banks, Fair Value	16,422	16,405
Interest earning deposits, Carrying Amount	4,315,100	2,945,682
Loans held-for-sale, Carrying Amount	897,227	865,961
Loans held-for-sale, Fair Value	897,227	865,961
Loans held-for-investment, net, Carrying Amount	728,390	746,751
Loans held-for-investment, net, Fair Value	732,754	751,165
Accrued interest receivable, Carrying Amount	9,432	8,698
Accrued interest receivable, Fair Value	9,432	8,698
Financial liabilities:
Deposits, Carrying Amount	7,002,371	5,248,026
Deposits, Fair Value	7,269,900	5,458,900
Subordinated debentures, Carrying Amount	15,834	15,831
Subordinated debentures, Fair Value	15,333	15,231
Accrued interest payable, Carrying Amount	107	260
Accrued interest payable, Fair Value	107	260
Interest earning deposits
Financial assets:
Cash and due from banks, Fair Value	4,315,100	2,945,682
Level 1
Financial assets:
Cash and due from banks, Fair Value	16,422	16,405
Loans held-for-sale, Fair Value	0	0
Loans held-for-investment, net, Fair Value	0	0
Accrued interest receivable, Fair Value	119	8
Financial liabilities:
Deposits, Fair Value	0	0
Subordinated debentures, Fair Value	0	0
Accrued interest payable, Fair Value	0	0
Level 1 | Interest earning deposits
Financial assets:
Cash and due from banks, Fair Value	4,315,100	2,945,682
Level 2
Financial assets:
Cash and due from banks, Fair Value	0	0
Loans held-for-sale, Fair Value	897,227	865,961
Loans held-for-investment, net, Fair Value	0	0
Accrued interest receivable, Fair Value	2,797	2,630
Financial liabilities:
Deposits, Fair Value	7,269,900	5,458,900
Subordinated debentures, Fair Value	15,333	15,231
Accrued interest payable, Fair Value	107	260
Level 2 | Interest earning deposits
Financial assets:
Cash and due from banks, Fair Value	0	0
Level 3
Financial assets:
Cash and due from banks, Fair Value	0	0
Loans held-for-sale, Fair Value	0	0
Loans held-for-investment, net, Fair Value	732,754	751,165
Accrued interest receivable, Fair Value	6,516	6,060
Financial liabilities:
Deposits, Fair Value	0	0
Subordinated debentures, Fair Value	0	0
Accrued interest payable, Fair Value	0	0
Level 3 | Interest earning deposits
Financial assets:
Cash and due from banks, Fair Value	$ 0	$ 0

Earnings Per Share - Summary (D

Earnings Per Share - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic
Net income	$ 12,710	$ 4,393
Weighted average common shares outstanding (shares)	22,504	18,668
Basic earnings per common share (USD per share)	$ 0.56	$ 0.24
Diluted
Net income	$ 12,710	$ 4,393
Weighted average common shares outstanding for basic earnings per common share (shares)	22,504	18,668
Add: Dilutive effects of assumed exercise of stock options (shares)	506	449
Average shares and dilutive potential common shares (shares)	23,010	19,117
Dilutive earnings per common share (USD per share)	$ 0.55	$ 0.23

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Stock awards excluded from computation of diluted earnings per share (shares)	44	235

Subsequent Events - Narrative (

Subsequent Events - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	May 11, 2021	Mar. 31, 2021	Mar. 31, 2020
Subsequent Event [Line Items]
Aggregate net proceeds of stock offering		$ 423,540	$ 0
ATM Program | Class A Common Stock
Subsequent Event [Line Items]
Stock sold during period (shares)		1,297,365
Offering price per share (USD per share)		$ 118.39
Aggregate gross proceeds of stock offering		$ 153,600
Aggregate net proceeds of stock offering		$ 151,100
Subsequent Event | ATM Program | Class A Common Stock
Subsequent Event [Line Items]
Stock sold during period (shares)	515,239
Offering price per share (USD per share)	$ 118.10
Aggregate gross proceeds of stock offering	$ 60,800