Pacific Premier Bancorp (PPBI) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 08, 2018
Document and Entity Information
Entity Registrant Name	PACIFIC PREMIER BANCORP INC
Entity Central Index Key	1,028,918
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		46,529,210
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 42,575	$ 79,284
Interest-bearing deposits with financial institutions	86,421	120,780
Cash and cash equivalents	128,996	200,064
Interest-bearing time deposits with financial institutions	3,693	3,693
Investments held-to-maturity, at amortized cost (fair value of $23,915 as of March 31, 2018 and $18,082 as of December 31, 2017, respectively)	24,559	18,291
Investment securities available-for-sale, at fair value	863,243	787,429
FHLB, FRB and other stock, at cost	82,115	65,881
Loans held for sale, at lower of cost or fair value	29,034	23,426
Loans held for investment	6,241,841	6,196,468
Allowance for loan losses	(30,502)	(28,936)
Loans held for investment, net	6,211,339	6,167,532
Accrued interest receivable	27,073	27,053
Other real estate owned	206	326
Premises and equipment	53,146	53,155
Deferred income taxes, net	13,941	13,265
Bank owned life insurance	76,454	75,976
Intangible assets	40,740	43,014
Goodwill	493,785	493,329
Other assets	38,492	52,067
Total assets	8,086,816	8,024,501
Deposit accounts:
Noninterest-bearing checking	2,312,586	2,226,848
Interest-bearing:
Checking	355,895	365,193
Money market/savings	2,405,869	2,409,007
Retail certificates of deposit	770,397	767,651
Wholesale/brokered certificates of deposit	347,526	317,169
Total interest-bearing	3,879,687	3,859,020
Total deposits	6,192,273	6,085,868
FHLB advances and other borrowings	483,525	536,287
Subordinated debentures	105,188	105,123
Accrued expenses and other liabilities	43,922	55,227
Total liabilities	6,824,908	6,782,505
STOCKHOLDERS’ EQUITY:
Preferred stock, $.01 par value; 1,000,000 authorized; none issued and outstanding	0	0
Common stock, $.01 par value; 100,000,000 shares authorized; 46,527,566 shares at March 31, 2018 and 100,000,000 shares authorized; 46,245,050 shares at December 31, 2017 issued and outstanding	472	458
Additional paid-in capital	1,065,218	1,063,974
Retained earnings	205,069	177,149
Accumulated other comprehensive (loss) income	(8,851)	415
Total stockholders' equity	1,261,908	1,241,996
Total liabilities and stockholders' equity	$ 8,086,816	$ 8,024,501

CONSOLIDATED STATEMENTS OF FIN3

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Fair value	$ 23,915	$ 18,082
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	46,527,566	46,245,050
Common stock, shares outstanding (in shares)	46,527,566	46,245,050

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
INTEREST INCOME
Loans	$ 84,173	$ 80,122	$ 42,436
Investment securities and other interest-earning assets	6,654	5,562	2,991
Total interest income	90,827	85,684	45,427
INTEREST EXPENSE
Deposits	5,914	4,597	2,135
FHLB advances and other borrowings	2,023	1,471	604
Subordinated debentures	1,609	1,446	985
Total interest expense	9,546	7,514	3,724
Net interest income before provision for loan losses	81,281	78,170	41,703
Provision for loan losses	2,253	2,185	2,502
Net interest income after provision for loan losses	79,028	75,985	39,201
NONINTEREST INCOME
Loan servicing fees	345	145	221
Service charges on deposit accounts	1,150	1,121	341
Other service fee income	146	122	379
Debit card interchange fee income	1,036	1,050	67
Earnings on bank-owned life insurance	611	625	336
Net gain from sales of loans	2,958	3,331	2,811
Net gain (loss) from sales of investment securities	6	(252)	0
Other income	1,414	3,309	528
Total noninterest income	7,666	9,451	4,683
NONINTEREST EXPENSE
Compensation and benefits	28,873	25,920	14,887
Premises and occupancy	4,781	4,540	2,453
Data processing	2,702	2,498	1,187
Other real estate owned operations, net	1	13	12
FDIC insurance premiums	611	499	455
Legal, audit and professional expense	1,839	1,924	857
Marketing expense	1,530	1,364	818
Office, telecommunications and postage expense	1,080	927	433
Loan expense	591	746	468
Deposit expense	1,676	1,478	1,444
Merger-related expense	936	5,436	4,946
CDI amortization	2,274	2,111	511
Other expense	2,914	2,439	1,276
Total noninterest expense	49,808	49,895	29,747
Net income before income taxes	36,886	35,541	14,137
Income tax	8,884	19,370	4,616
Net Income	$ 28,002	$ 16,171	$ 9,521
EARNINGS PER SHARE
Basic (in dollars per share)	$ 0.61	$ 0.37	$ 0.35
Diluted (in dollars per share)	$ 0.60	$ 0.36	$ 0.34
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	45,893,496	43,797,403	27,528,940
Diluted (in shares)	46,652,059	44,614,348	28,197,220

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income		$ 28,002	$ 16,171	$ 9,521
Other comprehensive income, net of tax:
Unrealized holding (loss)/gain on securities arising during the period, net of income taxes	[1]	(9,343)	(2,216)	1,013
Reclassification adjustment for net (gains) losses on sale of securities included in net income, net of income taxes	[2]	(5)	155	0
Other comprehensive (loss) income, net of tax		(9,348)	(2,061)	1,013
Comprehensive income, net of tax		$ 18,654	$ 14,110	$ 10,534
[1]	Income tax (benefit) expense on the unrealized (loss)/gain on securities was $(3.9) million for the three months ended March 31, 2018, $(1.6) million for the three months ended December 31, 2017, $714,000 for the three months ended March 31, 2017.
[2]	Income tax expense (benefit) on the reclassification adjustment for net (gains) losses on sale of securities included in net income was $1,000 for the three months ended March 31, 2018, $(97,000) for the three months ended December 31, 2017, $0 for the three months ended March 31, 2017.

CONSOLIDATED STATEMENTS OF COM6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Unrealized holding (loss)/gain on securities arising during the period, income tax expense (benefit)	$ (3,900)	$ (1,600)	$ 714
Reclassification adjustment for net (gains) losses on sale of securities included in net income, income tax expense (benefit)	$ 1	$ (97)	$ 0

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2016	$ 459,740	$ 274	$ 345,138	$ 117,049	$ (2,721)
Balance (in shares) at Dec. 31, 2016		27,798,283
Increase (Decrease) in Stockholders' Equity
Net income	9,521			9,521
Other comprehensive income	1,013				1,013
Share-based compensation expense	1,154		1,154
Issuance of restricted stock, net (in shares)		56,866
Repurchase of common stock	(904)		(904)
Repurchase of common stock (in shares)		0
Exercise of stock options	501	$ 1	500
Exercise of stock options (in shares)		53,667
Balance at Mar. 31, 2017	471,025	$ 275	345,888	126,570	(1,708)
Balance (in shares) at Mar. 31, 2017		27,908,816
Balance at Dec. 31, 2017	$ 1,241,996	$ 458	1,063,974	177,149	415
Balance (in shares) at Dec. 31, 2017	46,245,050	46,245,050
Increase (Decrease) in Stockholders' Equity
Net income	$ 28,002			28,002
Other comprehensive income	(9,348)				(9,348)
Share-based compensation expense	1,712		1,712
Issuance of restricted stock, net	0		0
Issuance of restricted stock, net (in shares)		197,422
Repurchase of common stock	(1,538)		(1,538)
Repurchase of common stock (in shares)		(26,168)
Exercise of stock options	1,084	$ 14	1,070
Exercise of stock options (in shares)		111,262
Reclassification of certain tax effects of the Tax Cuts and Jobs Act	0			(82)	82
Balance at Mar. 31, 2018	$ 1,261,908	$ 472	$ 1,065,218	$ 205,069	$ (8,851)
Balance (in shares) at Mar. 31, 2018	46,527,566	46,527,566

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 28,002	$ 9,521
Adjustments to net income:
Depreciation and amortization expense	1,657	825
Provision for loan losses	2,253	2,502
Share-based compensation expense	1,712	1,154
Loss on sale and disposal of premises and equipment	0	45
Loss on sale of or write down of other real estate owned	12	0
Net amortization on securities available-for-sale, net	1,830	1,039
Net accretion of discounts/premiums for loans acquired and deferred loan fees/costs	(1,323)	(249)
Gain on sale of investment securities available-for-sale	(6)	0
Originations of loans held for sale	(29,229)	(35,149)
Proceeds from the sales of and principal payments from loans held for sale	38,814	33,037
Gain on sale of loans	(2,958)	(2,811)
Deferred income tax expense	3,183	3,350
Change in accrued expenses and other liabilities, net	(11,305)	(8,178)
Income from bank owned life insurance, net	(478)	(287)
Amortization of core deposit intangible	2,274	511
Change in accrued interest receivable and other assets, net	1,089	2,714
Net cash provided by operating activities	35,527	8,024
Cash flows from investing activities:
Proceeds from sale of real estate owned	108	0
Increase in loans, net	(44,508)	(144,347)
Principal payments on securities available-for-sale	21,846	10,535
Purchase of securities available-for-sale	(123,774)	(65,771)
Proceeds from sale or maturity of securities available-for-sale	(184)	1,770
Proceeds from the sale of premises and equipment	5,000	0
Purchases of premises and equipment	(1,647)	(655)
Change in FHLB, FRB, and other stock, at cost	(16,234)	(507)
Change in cash acquired in acquisitions, net	(456)	0
Net cash used in investing activities	(159,849)	(198,975)
Cash flows from financing activities:
Net increase in deposit accounts	106,405	151,588
Net change in short-term borrowings	(42,279)	(16,608)
Repayment of long-term borrowings	(10,418)	30
Proceeds from exercise of stock options and warrants	1,084	501
Repurchase of common stock	(1,538)	(904)
Net cash provided by financing activities	53,254	134,607
Net decrease in cash and cash equivalents	(71,068)	(56,344)
Cash and cash equivalents, beginning of period	200,064	156,857
Cash and cash equivalents, end of period	128,996	100,513
Supplemental cash flow disclosures:
Interest paid	9,974	4,565
Income taxes paid	$ 95	$ 36

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements include the accounts of Pacific Premier Bancorp, Inc. (the “Corporation”) and its wholly owned subsidiaries, including Pacific Premier Bank (the “Bank”) (collectively, the “Company,” “we,” “our” or “us”). All significant intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, the consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly the Company’s financial position as of March 31, 2018 and December 31, 2017 , the results of its operations and comprehensive income for the three months ended March 31, 2018 , December 31, 2017 and March 31, 2017 and the changes in stockholders’ equity and cash flows for the three months ended March 31, 2018 and 2017 . Operating results or comprehensive income for the three months ended March 31, 2018 are not necessarily indicative of the results or comprehensive income that may be expected for any other interim period or the full year ending December 31, 2018 . Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). The unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 (the “ 2017 Annual Report”). The Company accounts for its investments in its wholly owned special purpose entities, PPBI Trust I, Heritage Oaks Capital Trust II, Mission Community Capital Trust I, and Santa Lucia Bancorp (CA) Capital Trust, under the equity method whereby the subsidiary’s net earnings are recognized in the Company’s statement of income.

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Accounting Standards Adopted in 2018 In February 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . On December 22, 2017, the Tax Cuts and Jobs Act of 2017 was signed into law, which among other things reduced the maximum federal corporate tax rate from 35% to 21%. This Update addresses concerns about the guidance in current U.S. GAAP that requires deferred tax liabilities and assets to be adjusted for the effect of a change in tax laws or rates with the effect included in income from continuing operations in the reporting period that includes the enactment date. That guidance is applicable even in situations in which the related income tax effects of items in accumulated other comprehensive income ("AOCI") were originally recognized in other comprehensive income (rather than in income from continuing operations). As a result of the adjustment of deferred taxes being required to be included in income from continuing operations, the tax effects of items within accumulated other comprehensive income (referred to as stranded tax effects for purposes of this Update) do not reflect the appropriate tax rate. This Update allows for an election to reclass between retained earnings and AOCI the impact of the federal income tax rate change. The amendments in this Update are effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption of the amendments of this Update is permitted. The Company elected to early adopt in the first quarter of 2018. Accordingly, the Company recorded an increase to AOCI and a decrease to retain earnings of approximately $82,000 for stranded tax effects on investment available for sale securities in the first quarter of 2018. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . Under the current implementation guidance in Topic 805, there are three elements of a business-inputs, processes, and outputs. While an integrated set of assets and activities (collectively referred to as a “set”) that is a business usually has outputs, outputs are not required to be present. In addition, all the inputs and processes that a seller uses in operating a set are not required if market participants can acquire the set and continue to produce outputs. The amendments in this Update provide a screen to determine when a set is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated. If the screen is not met, the amendments in this Update (1) require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and (2) remove the evaluation of whether a market participant could replace missing elements. The amendments provide a framework to assist entities in evaluating whether both an input and a substantive process are present. The framework includes two sets of criteria to consider that depend on whether a set has outputs. Although outputs are not required for a set to be a business, outputs generally are a key element of a business; therefore, the Company has developed more stringent criteria for sets without outputs. Lastly, the amendments in this Update narrow the definition of the term output so that the term is consistent with how outputs are described in Topic 606. Public business entities should apply the amendments in this Update to annual periods beginning after December 15, 2017, including interim periods within those periods. The adoption of this standard did not have a material effect on the Company's operating results or financial condition. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash . The Update requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The adoption of this standard did not have a material effect on the Company's operating results or financial condition. In August 2016, the FASB issued ASU 2016-15, Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments . The Update provides guidance on eight specific cash flow classification issues, which include: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments or debt with coupon interest rates that are insignificant in relation to the effective interest rate; 3) contingent consideration payments made soon after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investments; 7) beneficial interest in securitization transactions; and 8) separately identifiable cash flows and the application of the predominance principle. The amendments in this Update are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period; however, an entity is required to adopt all of the amendments in the same period. The amendments in this Update should be applied using a retrospective transition method to each period presented. The adoption of this standard did not have a material effect on the Company's operating results or financial condition. In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities . Changes made to the current measurement model primarily affect the accounting for equity securities with readily determinable fair values, where changes in fair value will impact earnings instead of other comprehensive income. The accounting for other financial instruments, such as loans, investments in debt securities, and financial liabilities is largely unchanged. The Update also changes the presentation and disclosure requirements for financial instruments including a requirement that public business entities use exit price when measuring the fair value of financial instruments measured at amortized cost for disclosure purposes. This Update is effective for public business entities in fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-01 did not have a material effect on the Company's operating results or financial condition. In accordance with the guidance, the Company measures the fair value of financial instruments reported at amortized cost on the statement of financial condition using the exit price notion. For further details, refer to Note 10 - Fair Value of Financial instruments. ASU 2014-09, Revenue From Contracts With Customers (Topic 606) , ASU 2015-14 Revenue from Contracts with Customers (Topic 606): Deferral of Effective Date , ASU 2016-08 Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) , ASU 2016-10 Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , ASU 2016-11 Revenue Recognition (Topic 605) and Derivatives ad Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting , ASU 2016-12 Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients , and ASU 2016-20 Revenue from Contracts with Customers (Topic 606): Technical Corrections and Improvements to Topic 606 . The FASB amended existing guidance related to revenue from contracts with customers, superseding and replacing nearly all existing revenue recognition guidance, including industry-specific guidance, establishing a new control-based revenue recognition model, changing the basis for deciding when revenue is recognized over time or at a point in time, providing new and more detailed guidance on specific topics and expanding and improving disclosures about revenue. In addition, this guidance specifies the accounting for some costs to obtain or fulfill a contract with a customer. The amendments are effective for public entities for annual reporting periods beginning after December 15, 2017. The Company adopted the provisions of ASU 2014-09 and its related amendments effective January 1, 2018 utilizing the modified retrospective transition method and determined the adoption was insignificant to the financial statements. Since the impact upon adoption of ASU 2014-09 was insignificant to the financial statements, a cumulative effect adjustment to retained earnings was not deemed necessary. The Company's review of its various revenue streams indicated that approximately 97% of the Company’s revenue is out of the scope of ASU 2014-09, including all of the Company’s net interest income and a significant portion of non-interest income. For those revenue streams that are within the scope of ASU 2014-09, the Company reviewed the associated customer contracts and agreements to determine the appropriate accounting for revenues under those contracts. The Company’s review did not identify any significant changes in the timing of revenue recognition under those contracts within the scope of ASU 2014-09. Significant revenue streams that are within scope primarily relate to service charges and fees associated customer deposit accounts, as well as fees for various other services the Company provides its customers. As a result of the implementation of ASU 2014-09, the Company will conduct a detailed review of its revenue streams at least annually, or more frequently if deemed necessary. Recent Accounting Guidance Not Yet Effective In March 2017, the FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchase Callable Debt Securities. The updated amends guidance on the amortization period of premiums on certain purchased callable debt securities. The amendments shorten the amortization period of premiums on purchased callable debt securities to the earliest call date. The update should be applied on a modified retrospective basis through a cumulative-effect adjustment to beginning retained earnings. The effective date of ASU 2017-08 is for interim and annual reporting periods beginning after December 15, 2018. The adoption of this standard is not expected to have a material effect on the Company's operating results or financial condition. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . The amendments replace the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. For public business entities, the amendment is effective for annual periods beginning after December 15, 2019 and interim period within those annual periods. The Company is currently evaluating the effects of ASU 2016-13 on its financial statements and disclosures. The Company is in the process of compiling key data elements and implementing a software model that will meet the requirements of the new guidance. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The new standard is being issued to increase the transparency and comparability around lease obligations. Previously unrecorded off-balance sheet obligations will now be brought more prominently to light by presenting lease liabilities on the face of the balance sheet, accompanied by enhanced qualitative and quantitative disclosures in the notes to the financial statements. The Update is generally effective for public business entities in fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently in the process of evaluating existing lease obligations and service agreements under the provisions of the new standard. This evaluation includes an assessment of the appropriate classification and related accounting of each lease agreement under the new standard, a review of applicability of the new standard to existing service agreements, and gathering all essential lease data that will facilitate the application of the new standard. Upon adoption of the new standard, the Company will record a liability representing an obligation to make future lease payments and will also record an asset representing rights to use the underlying leased assets. As of March 31, 2018, the Company believes these assets and liabilities to be recognized under the new standard will amount to less than 1% of the Company's total assets.

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Our accounting policies are described in Note 1. Description of Business and Summary of Significant Accounting Policies , of our audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission ("Form 10-K"). Select policies have been reiterated below that have a particular affiliation to our interim financial statements. Revenue Recognition - The Company accounts for certain of its revenue streams in accordance with ASC 606 - Revenue from Contracts with Customers . Revenue streams within the scope of and accounted for under ASC 606 include: service charges and fees on deposit accounts, debit card interchange fees, fees from other services the Bank provides its customers, and gains and losses from the sale of other real estate owned and property, premises and equipment. ASC 606 requires revenue to be recognized when the Company satisfies related performance obligations by transferring to the customer a good or service. The recognition of revenue under ASC 606 requires the Company to first identify the contract with the customer, identify the performance obligations, determine the transaction price, allocate the transaction price to the performance obligations, and finally recognize revenue when the performance obligations have been satisfied and the good or service has been transferred. The majority of the Company’s contracts with customers associated with revenue streams that are within the scope of ASC 606 are considered short-term in nature and can be cancelled at any time by the customer or the Bank, such as a deposit account agreement. Other more significant revenue streams for the Company such as interest income on loans and investment securities are specifically excluded from the scope of ASC 606 and are accounted for under other applicable GAAP. The following provides information concerning the components of noninterest income: • Loan servicing fees - generally consist of fees related to servicing of loans for others, as well as the net impact of related serving asset amortization. This revenue stream is excluded from the scope of ASC 606 and is accounted for under other applicable GAAP. Loan servicing fees totaled $345,000 or approximately 0.4% of total revenues for the three months ended March 31, 2018. • Service charges on deposit accounts and other service fee income - consist of periodic service charges on deposit accounts and transaction based fees such as those related to overdrafts, ATM charges and wire transfer fees. Performance obligations for periodic service charges on deposit accounts are typically short term in nature and are generally satisfied on a monthly basis, while performance obligations for other transaction based fees are typically satisfied at a point in time (which may consist of only a few moments to perform the service or transaction) with no further obligations on behalf of the Bank to the customer. Periodic service charges are generally collected monthly directly from the customer's deposit account, and at the end of a statement cycle, while transaction based service charges are typically collected at the time of or soon after the service is performed. Service charges on deposit accounts and other service fee income are accounted for under ASC 606 and totaled $1.3 million or approximately 1.5% of total revenues for the three months ended March 31, 2018. • Debit card interchange fee income - consist of transaction processing fees associated with customer debit card transactions processed through a payment network. The related performance obligations are generally satisfied when the customer transactions, which generate the fee, are processed. Debit card interchange income is accounted for under ASC 606 and totaled $1.0 million or approximately 1.2% of total revenues for the three months ended March 31, 2018. • Earnings on bank-owned life insurance - relates to the periodic increase in the cash surrender value of bank-owned life insurance policies. This revenue stream is excluded from the scope of ASC 606, and is accounted for under other applicable GAAP (ASC 325-30). Earnings on bank-owned life insurance total $611,000 or 0.7% of total revenues for the three months ended March 31, 2018. • Gains (losses) on the sale of loans and investment securities - gains (losses) from the periodic sale of loans and investment securities are excluded from the scope of ASC 606 and are accounted for under other applicable GAAP. Net gains from the sale of loans and investment securities totaled $3.0 million or 3.3% of total revenues for the three months ended March 31, 2018. • Other income - generally consists of recoveries on acquired loans, which were fully charged off and had no book value prior to their acquisition. This revenue stream is excluded from the scope of ASC 606 and is accounted for under other applicable GAAP. Other income also consists of other miscellaneous fees, which are accounted for under ASC 606, however, much like service charges on deposit accounts, these fees have performance obligations that are very short term in nature and are typically satisfied at a point in time. Revenues included in other income that are accounted for under ASC 606 totaled $300,000 or approximately 0.3% of total revenues for the three months ended March 31, 2018. Revenues included in other income that are accounted for under other applicable GAAP totaled $1.1 million or 1.3% of total revenues for the three months ended March 31, 2018. Other revenue streams that may be applicable to the Company include gains and losses from the sale of non-financial assets such as other real estate owned and property premises and equipment. The Company accounts for these revenue streams in accordance with ASC 610-20, which requires the Company to look to guidance in ASC 606 in the application of certain measurement and recognition concepts. The Company records gains and losses on the sale of non-financial assets when control of the asset has been surrendered to the buyer, which generally occurs at a specific point in time. Certain Acquired Loans –As part of business acquisitions, the Bank acquires certain loans that have shown evidence of credit deterioration since origination. These acquired loans are recorded at the allocated fair value, such that there is no carryover of the seller’s allowance for loan losses. Such acquired loans are accounted for individually. The Bank estimates the amount and timing of expected cash flows for each purchased loan, and the expected cash flows in excess of the allocated fair value is recorded as interest income over the remaining life of the loan (accretable yield). The excess of the loan’s contractual principal and interest over expected cash flows is not recorded (non-accretable difference). Over the life of the loan, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded through the allowance for loan losses. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income. Goodwill and Core Deposit Intangible –Goodwill is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exist that indicate the necessity for such impairment tests to be performed. The Company has selected November 30 as the date to perform the annual impairment test. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on our balance sheet. Core deposit intangible assets arising from whole bank acquisitions are amortized on either an accelerated basis, reflecting the pattern in which the economic benefits of the intangible assets is consumed or otherwise used up, or on a straight-line amortization method over their estimated useful lives, which range from 6 to 10 years . Use of Estimates –The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions	Acquisitions Plaza Bancorp Acquisition Effective as of November 1, 2017, the Company completed the acquisition of Plaza Bancorp (OTC Market Group Pink Sheets: PLZZ) (“Plaza”), the holding company of Plaza Bank, a California chartered banking corporation headquartered in Irvine, California with $1.3 billion in total assets, $1.1 billion in gross loans and $1.1 billion in total deposits. Pursuant to the terms of the merger agreement, each outstanding share of Plaza common stock was converted into the right to receive 0.2000 shares of Company common stock. The value of the total deal consideration was approximately $246 million , which included approximately $6.5 million of aggregate cash consideration payable to holders of unexercised options and warrants exercisable for shares of Plaza common stock, and the issuance of 6,049,373 shares of the Company's common stock, which had a value of $40.40 per share, which was the closing price of the Company's common stock on October 31, 2017, the last trading day prior to the consummation of the acquisition. Goodwill in the amount of $122 million was recognized in the Plaza acquisition. Goodwill represents the future economic benefits arising from net assets acquired that are not individually identified and separately recognized and is attributable to synergies expected to be derived from the combination of the two entities. Goodwill recognized in this transaction is not deductible for income tax purposes. The following table represents the assets acquired and liabilities assumed of Plaza as of November 1, 2017 and the fair value adjustments and amounts recorded by the Company in 2017 under the acquisition method of accounting, which are subject to adjustment for up to one year after the merger date: Plaza Fair Value Adjustments Fair Value ASSETS ACQUIRED (dollars in thousands) Cash and cash equivalents $ 150,459 $ — $ 150,459 Loans, gross 1,069,359 (6,458 ) 1,062,901 Allowance for loan losses (13,009 ) 13,009 — Fixed assets 7,389 (194 ) 7,195 Core deposit intangible 198 11,382 11,580 Deferred tax assets 11,849 (6,859 ) 4,990 Other assets 19,495 (330 ) 19,165 Total assets acquired $ 1,245,740 $ 10,550 $ 1,256,290 LIABILITIES ASSUMED Deposits $ 1,081,727 $ 1,224 $ 1,082,951 Borrowings 40,755 397 41,152 Other Liabilities 8,956 (622 ) 8,334 Total liabilities assumed 1,131,438 999 1,132,437 Excess of assets acquired over liabilities assumed $ 114,302 $ 9,551 123,853 Consideration paid 245,761 Goodwill recognized $ 121,908 Heritage Oaks Bancorp Acquisition Effective as of April 1, 2017, the Company completed the acquisition of Heritage Oaks Bancorp ("HEOP"), the holding company of Heritage Oaks Bank, a Paso Robles, California based state-chartered bank (“Heritage Oaks Bank”) with $2.0 billion in total assets, $1.4 billion in gross loans and $1.7 billion in total deposits at March 31, 2017. Heritage Oaks Bank operated branches within San Luis Obispo and Santa Barbara Counties and a loan production office in Ventura County. Pursuant to the terms of the merger agreement, each outstanding share of HEOP common stock was converted into the right to receive 0.3471 shares of corporate common stock. The value of the total deal consideration was approximately $468 million , which included approximately $3.9 million of aggregate cash consideration payable to holders of HEOP share-based compensation awards, and the issuance of 11,959,022 shares of the Corporation's common stock, which had a value of $38.55 per share, which was the closing price of the Corporation's common stock on March 31, 2017, the last trading day prior to the consummation of the acquisition. Goodwill in the amount of $269 million was recognized in the HEOP acquisition. Goodwill represents the future economic benefits arising from net assets acquired that are not individually identified and separately recognized and is attributable to synergies expected to be derived from the combination of the two entities. Goodwill recognized in this transaction is not deductible for income tax purposes. The following table represents the assets acquired and liabilities assumed of HEOP as of April 1, 2017 and the fair value adjustments and amounts recorded by the Company in 2017 under the acquisition method of accounting: HEOP Book Value Fair Value Adjustments Fair Value ASSETS ACQUIRED (dollars in thousands) Cash and cash equivalents $ 78,728 $ — $ 78,728 Investment securities 447,520 (4,597 ) 442,923 Loans, gross 1,387,949 (23,300 ) 1,364,649 Allowance for loan losses (17,200 ) 17,200 — Fixed assets 35,567 (665 ) 34,902 Core deposit intangible — 28,123 28,123 Deferred tax assets 17,850 (6,567 ) 11,283 Other assets 55,223 (9 ) 55,214 Total assets acquired $ 2,005,637 $ 10,185 $ 2,015,822 LIABILITIES ASSUMED Deposits 1,668,079 1,471 1,669,550 Borrowings 141,996 (2,962 ) 139,034 Other Liabilities 7,290 771 8,061 Total liabilities assumed 1,817,365 (720 ) 1,816,645 Excess of assets acquired over liabilities assumed $ 188,272 $ 10,905 199,177 Consideration paid 468,131 Goodwill recognized $ 268,954 The fair values are estimates and are subject to adjustment for up to one year after the merger date. In the third quarter of 2017, the Company made a $1.1 million adjustment to deferred tax assets and the deal consideration. As of March 31, 2018, the Company finalized its fair values with this acquisition. The Company accounted for these transactions under the acquisition method of accounting in accordance with ASC 805, Business Combinations , which requires purchased assets and liabilities assumed to be recorded at their respective fair values at the date of acquisition. The loan portfolios of Plaza and HEOP were recorded at fair value at the date of each acquisition. A valuation of Plaza and HEOP's loan portfolio was performed as of the acquisition dates to assess the fair value of the loan portfolio. The loan portfolios were both segmented into two groups; loan with credit deterioration and loans without credit deterioration, and then split further by loan type. The fair value was calculated on an individual loan basis using a discounted cash flow analysis. The discount rate utilized was based on a weighted average cost of capital, considering the cost of equity and cost of debt. Also factored into the fair value estimates were loss rates, recovery period and prepayment rates based on industry standards. The Company also determined the fair value of the core deposit intangible, securities and deposits with the assistance of third-party valuations as well as the fair value of OREO was based on recent appraisals of the properties. The core deposit intangible on non-maturing deposit was determined by evaluating the underlying characteristics of the deposit relationships, including customer attrition, deposit interest rates, service charge income, overhead expense and costs of alternative funding. Since the fair value of intangible assets are calculated as if they were stand-alone assets, the presumption is that a hypothetical buyer of the intangible asset would be able to take advantage of potential tax benefits resulting from the asset purchase. The value of the benefit is the present value over the period of the tax benefit, using the discount rate applicable to the asset. In determining the fair value of certificates of deposit, a discounted cash flow analysis was used, which involved present valuing the contractual payments over the remaining life of the certificates of deposit at market-based interest rates. For loans acquired from Plaza and HEOP, the contractual amounts due, expected cash flows to be collected, interest component and fair value as of the respective acquisition dates were as follows: Acquired Loans Plaza HEOP (dollars in thousands) Contractual amounts due $ 1,708,685 $ 1,717,191 Cash flows not expected to be collected 20,152 4,442 Expected cash flows 1,688,533 1,712,749 Interest component of expected cash flows 625,592 348,100 Fair value of acquired loans $ 1,062,941 $ 1,364,649 In accordance with generally accepted accounting principles, there was no carryover of the allowance for loan losses that had been previously recorded by Plaza and HEOP. The operating results of the Company for the three months ended March 31, 2018 , December 31, 2017 and March 31, 2017 include the operating results of Plaza and HEOP since its acquisition date. The following table presents the net interest and other income, net income and earnings per share as if the acquisition of Plaza and HEOP were effective as of January 1, 2017. There were no material, nonrecurring adjustments to the pro forma net interest and other income, net income and earnings per share presented below: Three Months Ended March 31, December 31, March 31, 2018 2017 2017 (dollars in thousands) Net interest and other income $ 86,694 $ 90,469 $ 77,840 Net income 28,002 12,189 13,771 Basic earnings per share 0.61 0.27 0.30 Diluted earnings per share 0.60 0.26 0.30

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The amortized cost and estimated fair value of securities were as follows: March 31, 2018 Amortized Cost Unrealized Gain Unrealized Loss Estimated Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ 44,208 $ 60 $ (104 ) $ 44,164 Corporate 103,671 1,084 (349 ) 104,406 Municipal bonds 225,201 1,522 (3,066 ) 223,657 Collateralized mortgage obligation: residential 32,223 97 (611 ) 31,709 Mortgage-backed securities: residential 470,502 111 (11,306 ) 459,307 Total investment securities available-for-sale 875,805 2,874 (15,436 ) 863,243 Investment securities held-to-maturity: Mortgage-backed securities: residential 23,434 — (644 ) 22,790 Other 1,125 — — 1,125 Total investment securities held-to-maturity 24,559 — (644 ) 23,915 Total investment securities $ 900,364 $ 2,874 $ (16,080 ) $ 887,158 December 31, 2017 Amortized Cost Unrealized Gain Unrealized Loss Estimated Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ 47,051 $ 236 $ (78 ) $ 47,209 Corporate 78,155 1,585 (194 ) 79,546 Municipal bonds 228,929 3,942 (743 ) 232,128 Collateralized mortgage obligation: residential 33,984 132 (335 ) 33,781 Mortgage-backed securities: residential 398,664 266 (4,165 ) 394,765 Total investment securities available-for-sale 786,783 6,161 (5,515 ) 787,429 Investment securities held-to-maturity: Mortgage-backed securities: residential 17,153 — (209 ) 16,944 Other 1,138 — — 1,138 Total investment securities held-to-maturity 18,291 — (209 ) 18,082 Total investment securities $ 805,074 $ 6,161 $ (5,724 ) $ 805,511 Unrealized gains and losses on investment securities available-for-sale are recognized in stockholders’ equity as accumulated other comprehensive income or loss. At March 31, 2018 , the Company had an accumulated other comprehensive loss of $12.6 million , or $8.9 million net of tax, compared to an accumulated other comprehensive loss of $646,000 , or $415,000 net of tax, at December 31, 2017 . At March 31, 2018 , mortgage-backed securities ("MBS ") with an estimated par value of $59.7 million and a fair value of $60.1 million were pledged as collateral for the Bank’s two repurchase agreements, which totaled $18.5 million , and homeowner’s association (“HOA”) reverse repurchase agreements, which totaled $25.4 million . At December 31, 2017, MBS with an estimated par value of $55.6 million and a fair value of $57.0 million were pledged as collateral for the Bank’s three repurchase agreements, which totaled $28.5 million , and HOA reverse repurchase agreements, which totaled $17.6 million . At March 31, 2018 and December 31, 2017 , there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of shareholders' equity. The Company reviews individual securities classified as available-for-sale to determine whether a decline in fair value below the amortized cost basis is temporary because (i) those declines were due to interest rate changes and not to a deterioration in the creditworthiness of the issuers of those investment securities, and (ii) we have the ability to hold those securities until there is a recovery in their values or until their maturity. If it is probable that the Company will be unable to collect all amounts due according to contractual terms of the debt security not impaired at acquisition, an other-than-temporary impairment ("OTTI") shall be considered to have occurred. If an OTTI occurs, the cost basis of the security will be written down to its fair value as the new cost basis and the write down accounted for as a realized loss. The Company did not realize any OTTI losses for the three months ended March 31, 2018 and December 31, 2017 . The table below shows the number, fair value and gross unrealized holding losses of the Company’s investment securities by investment category and length of time that the securities have been in a continuous loss position. March 31, 2018 Less than 12 months 12 months or Longer Total Number Fair Value Gross Unrealized Holding Losses Number Fair Value Gross Unrealized Holding Losses Number Fair Value Gross Unrealized Holding Losses (dollars in thousands) Investment securities available-for-sale: Agency 19 $ 42,806 $ (82 ) 1 $ 1,358 $ (22 ) 20 $ 44,164 $ (104 ) Corporate 22 98,346 (210 ) 2 6,060 (139 ) 24 104,406 (349 ) Municipal bonds 289 207,591 (1,960 ) 32 16,066 (1,106 ) 321 223,657 (3,066 ) Collateralized mortgage obligation: residential 11 23,452 (351 ) 3 8,257 (260 ) 14 31,709 (611 ) Mortgage-backed securities: residential 105 355,559 (6,875 ) 42 103,748 (4,431 ) 147 459,307 (11,306 ) Total investment securities available-for-sale 446 727,754 (9,478 ) 80 135,489 (5,958 ) 526 863,243 (15,436 ) Investment securities held-to-maturity: Mortgage-backed securities: residential 4 16,773 (421 ) 1 6,017 (223 ) 5 22,790 (644 ) Total investment securities held-to-maturity 4 16,773 (421 ) 1 6,017 (223 ) 5 22,790 (644 ) Total investment securities 450 $ 744,527 $ (9,899 ) 81 $ 141,506 $ (6,181 ) 531 $ 886,033 $ (16,080 ) December 31, 2017 Less than 12 months 12 months or Longer Total Number Fair Gross Number Fair Gross Number Fair Gross (dollars in thousands) Investment securities available-for-sale: Agency 6 $ 13,754 $ (78 ) — $ — $ — 6 $ 13,754 $ (78 ) Corporate 4 10,079 (64 ) 2 6,076 (130 ) 6 16,155 (194 ) Municipal bonds 103 61,313 (268 ) 30 15,658 (475 ) 133 76,971 (743 ) Collateralized mortgage obligation: residential 5 13,971 (149 ) 3 8,943 (186 ) 8 22,914 (335 ) Mortgage-backed securities: residential 66 220,951 (1,600 ) 41 110,062 (2,565 ) 107 331,013 (4,165 ) Total investment securities available-for-sale 184 320,068 (2,159 ) 76 140,739 (3,356 ) 260 460,807 (5,515 ) Investment securities held-to-maturity: Mortgage-backed securities: residential 2 10,745 (133 ) 1 6,198 (76 ) 3 16,943 (209 ) Total investment securities held-to-maturity 2 10,745 (133 ) 1 6,198 (76 ) 3 16,943 (209 ) Total investment securities 186 $ 330,813 $ (2,292 ) 77 $ 146,937 $ (3,432 ) 263 $ 477,750 $ (5,724 ) The amortized cost and estimated fair value of investment securities at March 31, 2018 , by contractual maturity are shown in the table below. One Year or Less More than One Year to Five Years More than Five Years to Ten Years More than Ten Years Total Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ — $ — $ — $ — $ 19,761 $ 19,726 $ 24,447 $ 24,438 $ 44,208 $ 44,164 Corporate — — — — 91,671 92,330 12,000 12,076 103,671 104,406 Municipal bonds 4,463 4,463 31,257 31,194 73,327 72,004 116,154 115,996 225,201 223,657 Collateralized mortgage obligation: residential — — — — 1,007 1,009 31,216 30,700 32,223 31,709 Mortgage-backed securities: residential 2,572 2,565 2,346 2,283 93,312 91,605 372,272 362,854 470,502 459,307 Total investment securities available-for-sale 7,035 7,028 33,603 33,477 279,078 276,674 556,089 546,064 875,805 863,243 Investment securities held-to-maturity: Mortgage-backed securities: residential — — — — — — 23,434 22,790 23,434 22,790 Other — — — — — — 1,125 1,125 1,125 1,125 Total investment securities held-to-maturity — — — — — — 24,559 23,915 24,559 23,915 Total investment securities $ 7,035 $ 7,028 $ 33,603 $ 33,477 $ 279,078 $ 276,674 $ 580,648 $ 569,979 $ 900,364 $ 887,158 During the three months ended March 31, 2018 , the Company recognized gross gains on sales of available-for-sale securities in the amount of $6,000 , which represents adjustments to 2017 year end investment sales that settled in January 2018. There were no gross gains on sales of available-for-sale securities during the three months ended March 31, 2017 and December 31, 2017 . The Company did not recognize any gross losses on the sales of available-for sale securities during the three months ended March 31, 2018 and March 31, 2017 . The Company recognized gross losses on the sales of available-for-sale securities in the amount of $252,000 and had net proceeds of $14 million for the three months ended and December 31, 2017 . FHLB, FRB and other stock At March 31, 2018 , the Company had $17.3 million in Federal Home Loan Bank (“FHLB”) stock, $33.2 million in Federal Reserve Bank of San Francisco (“FRB”) stock, and $31.7 million in other stock, all carried at cost. During the three months ended March 31, 2018 and December 31, 2017 , the FHLB did not repurchase any of the Company’s excess FHLB stock through their stock repurchase program. The Company evaluates its investments in FHLB, FRB and other stock for impairment periodically, including their capital adequacy and overall financial condition. No impairment losses have been recorded through March 31, 2018 .

Loans Held for Investment

Loans Held for Investment	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loans Held for Investment	Loans Held for Investment The following table sets forth the composition of our loan portfolio in dollar amounts at the dates indicated: March 31, 2018 December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 1,062,385 $ 1,086,659 Franchise 692,846 660,414 Commercial owner occupied (1) 1,268,869 1,289,213 SBA 182,626 185,514 Agribusiness 149,256 116,066 Total business loans 3,355,982 3,337,866 Real estate loans Commercial non-owner occupied 1,227,693 1,243,115 Multi-family 817,963 794,384 One-to-four family (2) 266,324 270,894 Construction 319,610 282,811 Farmland 136,522 145,393 Land 34,452 31,233 Total real estate loans 2,802,564 2,767,830 Consumer loans Consumer loans 86,206 92,931 Gross loans held for investment (3) 6,244,752 6,198,627 Deferred loan origination costs/(fees) and premiums/(discounts), net (2,911 ) (2,159 ) Loans held for investment 6,241,841 6,196,468 Allowance for loan losses (30,502 ) (28,936 ) Loans held for investment, net $ 6,211,339 $ 6,167,532 Loans held for sale, at lower of cost or fair value $ 29,034 $ 23,426 ______________________________ (1) Secured by real estate. (2) Includes second trust deeds. (3) Total gross loans held for investment for March 31, 2018 and December 31, 2017 are net of the unaccreted fair value net purchase discounts of $24.5 million and $29.1 million , respectively. Loans Serviced for Others The Company generally retains the servicing rights of the guaranteed portion of SBA loans sold, for which the Company records a servicing asset at fair value within other assets. At March 31, 2018 and December 31, 2017 , the servicing asset totaled $8.8 million and was included in other assets. Servicing rights are evaluated for impairment based upon the fair value of the rights as compared to the carrying amount. Impairment is recognized through a valuation allowance, to the extent the fair value is less than the carrying amount. At March 31, 2018 and December 31, 2017 , the Company determined that no valuation allowance was necessary. Loans serviced for others are not included in the accompanying consolidated statements of financial condition. The unpaid principal balance of loans and participations serviced for others were $621 million at March 31, 2018 and $635 million at December 31, 2017 . Concentration of Credit Risk As of March 31, 2018 , the Company’s loan portfolio was primarily collateralized by various forms of real estate and business assets located predominately in California. The Company’s loan portfolio contains concentrations of credit in multi-family real estate, commercial non-owner occupied real estate and commercial owner occupied real estate and business loans. The Bank maintains policies approved by the Bank’s Board of Directors (the “Bank Board”) that address these concentrations and continues to diversify its loan portfolio through loan originations, purchases and sales to meet approved concentration levels. While management believes that the collateral presently securing these loans is adequate, there can be no assurances that a significant deterioration in the California real estate market or economy would not expose the Company to significantly greater credit risk. Under applicable laws and regulations, the Bank may not make secured loans to one borrower in excess of 25% of the Bank’s unimpaired capital plus surplus and likewise in excess of 15% of the Bank's unimpaired capital plus surplus for unsecured loans. These loans-to-one borrower limitations result in a dollar limitation of $345 million for secured loans and $207 million for unsecured loans at March 31, 2018 . At March 31, 2018 , the Bank’s largest aggregate outstanding balance of loans to one borrower was $45.0 million of secured credit. Credit Quality and Credit Risk Management The Company’s credit quality is maintained and credit risk managed in two distinct areas. The first is the loan origination process, wherein the Bank underwrites credit quality and chooses which risks it is willing to accept. The second is in the ongoing oversight of the loan portfolio, where existing credit risk is measured and monitored, and where performance issues are dealt with in a timely and comprehensive fashion. The Company maintains a comprehensive credit policy, which sets forth minimum and maximum tolerances for key elements of loan risk. The policy identifies and sets forth specific guidelines for analyzing each of the loan products the Company offers from both an individual and portfolio wide basis. The credit policy is reviewed annually by the Bank Board. The Bank’s seasoned underwriters ensure key risk factors are analyzed with nearly all underwriting including a comprehensive global cash flow analysis of the prospective borrowers. Credit risk is managed within the loan portfolio by the Company’s portfolio managers based on a comprehensive credit and portfolio review policy. This policy requires a program of financial data collection and analysis, comprehensive loan reviews, property and/or business inspections and monitoring of portfolio concentrations and trends. The portfolio managers also monitor asset-based lines of credit, loan covenants and other conditions associated with the Company’s business loans as a means to help identify potential credit risk. Individual loans, excluding the homogeneous loan portfolio, are reviewed at least every two years and in most cases, more often, including the assignment of a risk grade. Risk grades are based on a six -grade Pass scale; along with Special Mention, Substandard, Doubtful and Loss classifications, as such classifications are defined by the regulatory agencies. The assignment of risk grades allows the Company to, among other things; identify the risk associated with each credit in the portfolio, and to provide a basis for estimating credit losses inherent in the portfolio. Risk grades are reviewed regularly by the Company’s Credit and Portfolio Review committee, and are reviewed annually by an independent third party, as well as by regulatory agencies during scheduled examinations. The following provides brief definitions for risk grades assigned to loans in the portfolio: • Pass classifications represent assets with a level of credit quality, which contain no well-defined deficiency or weakness. • Special Mention assets do not currently expose the Bank to a sufficient risk to warrant classification in one of the adverse categories, but possess correctable deficiencies or potential weaknesses deserving management’s close attention. • Substandard assets are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. These assets are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. OREO acquired from foreclosure is also classified as substandard. • Doubtful credits have all the weaknesses inherent in substandard credits, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. • Loss assets are those that are considered uncollectible and of such little value that their continuance as assets is not warranted. Amounts classified as loss are promptly charged off. The portfolio managers also manage loan performance risks, collections, workouts, bankruptcies and foreclosures. Loan performance risks are mitigated by our portfolio managers acting promptly and assertively to address problem credits when they are identified. Collection efforts are commenced immediately upon non-payment, and the portfolio managers seek to promptly determine the appropriate steps to minimize the Company’s risk of loss. When foreclosure will maximize the Company’s recovery for a non-performing loan, the portfolio managers will take appropriate action to initiate the foreclosure process. When a loan is graded as special mention or substandard or doubtful, the Company obtains an updated valuation of the underlying collateral. If the credit in question is also identified as impaired, a valuation allowance, if necessary, is established against such loan or a loss is recognized by a charge to the allowance for loan losses (“ALLL”) if management believes that the full amount of the Company’s recorded investment in the loan is no longer collectable. The Company typically continues to obtain or confirm updated valuations of underlying collateral for special mention and classified loans on an annual basis in order to have the most current indication of fair value. Once a loan is identified as impaired, an analysis of the underlying collateral is performed at least quarterly, and corresponding changes in any related valuation allowance are made or balances deemed to be fully uncollectable are charged-off. The following tables stratify the loan portfolio by the Company’s internal risk grading as of the periods indicated: Credit Risk Grades Pass Special Mention Substandard Doubtful Total Gross Loans March 31, 2018 (dollars in thousands) Business loans Commercial and industrial $ 1,041,457 $ 8,172 $ 12,756 $ — $ 1,062,385 Franchise 692,846 — — — 692,846 Commercial owner occupied 1,262,138 4,170 18,220 — 1,284,528 SBA 193,527 890 1,573 — 195,990 Agribusiness 136,139 — 13,117 — 149,256 Real estate loans Commercial non-owner occupied 1,226,642 — 1,051 — 1,227,693 Multi-family 816,506 — 1,457 — 817,963 One-to-four family 264,574 145 1,605 — 266,324 Construction 318,923 687 — — 319,610 Farmland 135,413 — 1,109 — 136,522 Land 34,221 — 231 — 34,452 Consumer loans Consumer loans 86,071 — 135 — 86,206 Totals $ 6,208,457 $ 14,064 $ 51,254 $ — $ 6,273,775 Credit Risk Grades Pass Special Substandard Doubtful Total Gross December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 1,063,452 $ 8,163 $ 15,044 $ — $ 1,086,659 Franchise 660,414 — — — 660,414 Commercial owner occupied 1,273,381 654 21,180 — 1,295,215 SBA 199,468 1 3,469 — 202,938 Agribusiness 108,143 4,079 3,844 — 116,066 Real estate loans Commercial non-owner occupied 1,242,045 — 1,070 — 1,243,115 Multi-family 794,156 — 228 — 794,384 One-to-four family 268,776 154 1,964 — 270,894 Construction 282,294 517 — — 282,811 Farmland 144,234 44 1,115 — 145,393 Land 30,979 — 254 — 31,233 Consumer loans Consumer loans 92,794 — 137 — 92,931 Totals $ 6,160,136 $ 13,612 $ 48,305 $ — $ 6,222,053 The following tables set forth delinquencies in the Company’s loan portfolio at the dates indicated: Days Past Due Current 30-59 60-89 90+ Total Gross Loans Non-accruing March 31, 2018 (dollars in thousands) Business loans Commercial and industrial $ 1,056,886 $ 5,241 $ 93 $ 165 $ 1,062,385 $ 1,067 Franchise 692,846 — — — 692,846 — Commercial owner occupied 1,280,900 153 — 3,475 1,284,528 3,475 SBA 194,064 785 991 150 195,990 1,218 Agribusiness 149,256 — — — 149,256 — Real estate loans Commercial non-owner occupied 1,227,693 — — — 1,227,693 — Multi-family 816,732 — — 1,231 817,963 1,231 One-to-four family 265,943 345 — 36 266,324 1,134 Construction 319,610 — — — 319,610 — Farmland 136,522 — — — 136,522 — Land 34,363 81 — 8 34,452 8 Consumer loans Consumer loans 86,206 — — — 86,206 16 Totals $ 6,261,021 $ 6,605 $ 1,084 $ 5,065 $ 6,273,775 $ 8,149 Days Past Due Current 30-59 60-89 90+ Total Gross Loans Non-accruing December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 1,085,770 $ 84 $ 570 $ 235 $ 1,086,659 $ 1,160 Franchise 660,414 — — — 660,414 — Commercial owner occupied 1,291,255 3,474 486 — 1,295,215 97 SBA 200,821 177 — 1,940 202,938 1,201 Agribusiness 116,066 — — — 116,066 — Real estate loans Commercial non-owner occupied 1,243,115 — — — 1,243,115 — Multi-family 792,603 1,781 — — 794,384 — One-to-four family 269,725 354 — 815 270,894 817 Construction 282,811 — — — 282,811 — Farmland 145,393 — — — 145,393 — Land 31,141 83 — 9 31,233 9 Consumer loans Consumer loans 92,880 11 — 40 92,931 — Totals $ 6,211,994 $ 5,964 $ 1,056 $ 3,039 $ 6,222,053 $ 3,284 Impaired Loans The Company considers a loan to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or it is determined that the likelihood of the Company receiving all scheduled payments, including interest, when due is remote. The Company has no commitments to lend additional funds to debtors whose loans have been impaired. The Company reviews loans for impairment when the loan is classified as substandard or worse, delinquent 90 days, or determined by management to be collateral dependent, or when the borrower files bankruptcy or is granted a troubled debt restructuring (“TDR”). Measurement of impairment is based on the loan’s expected future cash flows discounted at the loan’s effective interest rate, measured by reference to an observable market value, if one exists, or the fair value of the collateral if the loan is deemed collateral dependent. Loans are generally charged-off at such time the loan is classified as a loss. Valuation allowances are determined on a loan-by-loan basis or by aggregating loans with similar risk characteristics. The following tables provide a summary of the Company’s investment in impaired loans as of the period indicated: Impaired Loans Unpaid Principal Balance Recorded Investment With Specific Allowance Without Specific Allowance Specific Allowance for Impaired Loans (dollars in thousands) March 31, 2018 Business loans Commercial and industrial $ 1,520 $ 1,067 $ — $ 1,067 $ — Commercial owner occupied 3,598 3,475 — 3,475 — SBA 4,575 1,218 — 1,218 — Real estate loans Commercial non-owner occupied — — — — — Multi-family 1,231 1,231 — 1,231 — One-to-four family 1,178 1,134 — 1,134 — Land 35 8 — 8 — Consumer loans Consumer loans 17 16 — 16 — Totals $ 12,154 $ 8,149 $ — $ 8,149 $ — Impaired Loans Unpaid Principal Balance Recorded Investment With Specific Allowance Without Specific Allowance Specific Allowance for Impaired Loans (dollars in thousands) December 31, 2017 Business loans Commercial and industrial $ 1,585 $ 1,160 $ — $ 1,160 $ — Commercial owner occupied 98 97 97 — 55 SBA 4,329 1,201 — 1,201 — Real estate loans One-to-four family 849 817 — 817 — Land 35 9 — 9 — Totals $ 6,896 $ 3,284 $ 97 $ 3,187 $ 55 Impaired Loans Three Months Ended March 31, 2018 December 31, 2017 March 31, 2017 Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) (dollars in thousands) Business loans Commercial and industrial $ 1,181 $ — $ 1,112 $ — $ 200 $ 5 Commercial owner occupied 3,475 — 125 — 192 3 SBA 1,241 — 1,123 — 307 5 Real estate loans 821 — One-to-four family 1,024 — 341 — 116 3 Construction — — 4,069 — — — Land 8 — 9 — 14 1 Consumer loans Consumer loans $ 94 $ — — — — — Totals $ 7,844 $ — $ 6,779 $ — $ 829 $ 17 (1) Cash basis and accrual basis is materially the same. The following table provides additional detail on the components of impaired loans at the period end indicated: March 31, 2018 December 31, 2017 (dollars in thousands) Nonaccruing loans $ 8,149 $ 3,284 Accruing loans — — Total impaired loans $ 8,149 $ 3,284 When loans are placed on nonaccrual status, all accrued interest and outstanding is reversed from earnings. Payments received on nonaccrual loans are generally applied as a reduction to the loan principal balance. If the likelihood of further loss is remote, the Company will recognize interest on a cash basis only. Loans may be returned to accruing status if the Company believes that all remaining principal and interest is fully collectible and there has been at least three months of sustained repayment performance since the loan was placed on nonaccrual. The Company does not accrue interest on loans 90 days or more past due or when, in the opinion of management, there is reasonable doubt as to the collection of interest. The Company had impaired loans on nonaccrual status of $8.1 million at March 31, 2018 and $3.3 million at December 31, 2017 . The Company had $73,000 in loans 90 days or more past due and still accruing at March 31, 2018 , compared to $1.8 million at December 31, 2017 . There were no TDRs at March 31, 2018 and $97,000 at December 31, 2017 . In addition, the Company had $14,000 in consumer mortgage loans collateralized by residential real estate property for which formal foreclosure proceedings were in process as of March 31, 2018 . This compares to $73,000 at December 31, 2017 . Purchased Credit Impaired Loans The Company has purchased loans, for which there was, at acquisition, evidence of deterioration of credit quality since origination and for which it was probable, at acquisition, that all contractually required payments would not be collected. The carrying amount of those loans is as follows: March 31, 2018 December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 3,134 $ 3,310 Commercial owner occupied 1,016 1,262 SBA 69 1,802 Real estate loans Commercial non-owner occupied 1,122 1,650 One-to-four family — 255 Construction/Land 768 600 Consumer loans 10 10 Total purchase credit impaired $ 6,119 $ 8,889 On each acquisition date, the amount by which the undiscounted expected cash flows of the purchased credit impaired loans exceed the estimated fair value of the loan is the “accretable yield.” The accretable yield is measured at each financial reporting date and represents the difference between the remaining undiscounted expected cash flows and the current carrying value of the purchased credit impaired loan. At March 31, 2018 , the Company had $6.1 million of purchased credit impaired loans, of which none were placed on nonaccrual status. The following table summarizes the accretable yield on the purchased credit impaired loans for the three months ended March 31, 2018 , December 31, 2017 and March 31, 2017 . Three Months Ended March 31, 2018 December 31, 2017 March 31, 2017 (dollars in thousands) Balance at the beginning of period $ 3,019 $ 3,148 $ 3,747 Additions — 1,066 — Accretion (236 ) (308 ) (629 ) Payoffs (1,850 ) (2,164 ) — Reclassification from (to) nonaccretable difference 776 1,277 483 Balance at the end of period $ 1,709 $ 3,019 $ 3,601

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2018
Provision for Loan and Lease Losses [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses The Company’s ALLL covers estimated credit losses on individually evaluated loans that are determined to be impaired as well as estimated probable incurred losses inherent in the remainder of the loan portfolio. The ALLL is prepared using the information provided by the Company’s credit review process together with data from peer institutions and economic information gathered from published sources. The loan portfolio is segmented into groups of loans with similar risk characteristics. Each segment possesses varying degrees of risk based on, among other things, the type of loan, the type of collateral, and the sensitivity of the borrower or industry to changes in external factors such as economic conditions. An estimated loss rate calculated using the Company’s actual historical loss rates adjusted for current portfolio trends, economic conditions, and other relevant internal and external factors, is applied to each group’s aggregate loan balances. The Company’s base ALLL factors are determined by management using the Bank’s annualized actual trailing charge-off data over a full credit cycle with the loss emergence period extending from 1 year to 1.4 years . Adjustments to those base factors are made for relevant internal and external factors. Those factors may include: • Changes in national, regional and local economic conditions, including trends in real estate values and the interest rate environment, • Changes in the nature and volume of the loan portfolio, including new types of lending, • Changes in volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans, and • The existence and effect of concentrations of credit, and changes in the level of such concentrations. For loans risk graded as watch or worse, progressively higher potential loss factors are applied based on migration analysis of risk grading and net charge-offs. The following tables summarize the allocation of the ALLL, as well as the activity in the ALLL attributed to various segments in the loan portfolio as of and for the three months ended for the periods indicated: Three Months Ended March 31, 2018 Commercial and industrial Franchise Commercial owner occupied SBA Agribusiness Commercial non-owner occupied Multi-family One-to-four family Construction Farmland Land Consumer loans Total (dollars in thousands) Balance, December 31, 2017 $ 9,721 $ 5,797 $ 767 $ 2,890 $ 1,291 $ 1,266 $ 607 $ 803 $ 4,569 $ 137 $ 993 $ 95 $ 28,936 Charge-offs (665 ) — — (29 ) — — — — — — — (52 ) (746 ) Recoveries 25 — 8 26 — — — — — — — — 59 Provisions for (reduction in) loan losses 411 298 16 (73 ) 814 71 (15 ) (58 ) 506 97 179 7 2,253 Balance, March 31, 2018 $ 9,492 $ 6,095 $ 791 $ 2,814 $ 2,105 $ 1,337 $ 592 $ 745 $ 5,075 $ 234 $ 1,172 $ 50 $ 30,502 Amount of allowance attributed to: Specifically evaluated impaired loans $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — General portfolio allocation 9,492 6,095 791 2,814 2,105 1,337 592 745 5,075 234 1,172 50 30,502 Loans individually evaluated for impairment 1,067 — 3,475 1,218 — — 1,231 1,134 — — 8 16 8,149 Specific reserves to total loans individually evaluated for impairment — % — % — % — % — % — % — % — % — % — % — % — % — % Loans collectively evaluated for impairment $ 1,061,318 $ 692,846 $ 1,265,394 $ 181,408 $ 149,256 $ 1,227,693 $ 816,732 $ 265,190 $ 319,610 $ 136,522 $ 34,444 $ 86,190 $ 6,236,603 General reserves to total loans collectively evaluated for impairment 0.89 % 0.88 % 0.06 % 1.55 % 1.41 % 0.11 % 0.07 % 0.28 % 1.59 % 0.17 % 3.40 % 0.06 % 0.49 % Total gross loans held for investment $ 1,062,385 $ 692,846 $ 1,268,869 $ 182,626 $ 149,256 $ 1,227,693 $ 817,963 $ 266,324 $ 319,610 $ 136,522 $ 34,452 $ 86,206 $ 6,244,752 Total allowance to gross loans held for investment 0.89 % 0.88 % 0.06 % 1.54 % 1.41 % 0.11 % 0.07 % 0.28 % 1.59 % 0.17 % 3.40 % 0.06 % 0.49 % Three Months Ended March 31, 2017 Commercial and industrial Franchise Commercial owner occupied SBA Multi-family One-to-four family Construction Land Consumer loans Total (dollars in thousands) Balance, December 31, 2016 $ 6,362 $ 3,845 $ 1,193 $ 1,039 $ 2,927 $ 365 $ 3,632 $ 198 $ 20 $ 21,296 Charge-offs (752 ) — — (8 ) — — — — — (760 ) Recoveries 22 — 12 2 — 1 — — — 37 Provisions for (reduction in) loan losses 1,317 629 27 112 (124 ) 7 395 6 1 2,502 Balance, March 31, 2017 $ 6,949 $ 4,474 $ 1,232 $ 1,145 $ 2,803 $ 373 $ 4,027 $ 204 $ 21 $ 23,075 Amount of allowance attributed to: Specifically evaluated impaired loans $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — General portfolio allocation 6,949 4,474 1,232 1,145 2,803 373 4,027 204 21 23,075 Loans individually evaluated for impairment — — 86 298 — 115 — 14 — 513 Specific reserves to total loans individually evaluated for impairment — % — % — % — % — % — % — % — % — % — % Loans collectively evaluated for impairment $ 593,457 $ 493,158 $ 482,209 $ 96,188 $ 682,237 $ 100,308 $ 298,279 $ 19,724 $ 3,930 $ 3,381,934 General reserves to total loans collectively evaluated for impairment 1.17 % 0.91 % 0.26 % 1.19 % 0.41 % 0.37 % 1.35 % 1.03 % 0.53 % 0.68 % Total gross loans held for investment $ 593,457 $ 493,158 $ 482,295 $ 96,486 $ 682,237 $ 100,423 $ 298,279 $ 19,738 $ 3,930 $ 3,382,447 Total allowance to gross loans held for investment 1.17 % 0.91 % 0.26 % 1.19 % 0.41 % 0.37 % 1.35 % 1.03 % 0.53 % 0.68 %

Subordinated Debentures

Subordinated Debentures	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Subordinated Debentures	Subordinated Debentures In August 2014, the Corporation issued $60 million in aggregate principal amount of 5.75% Subordinated Notes Due 2024 (the “Notes”) in a private placement transaction to institutional accredited investors (the “Private Placement”). The Corporation contributed $50 million of net proceeds from the Private Placement to the Bank to support general corporate purposes. The Notes bear interest at an annual fixed rate of 5.75% , and the first interest payment on the Notes occurred on March 3, 2015, and will continue to be payable semiannually each March 3 and September 3 until September 3, 2024. The Notes can only be redeemed, partially or in whole, prior to the maturity date if the notes do not constitute Tier 2 Capital (for purposes of capital adequacy guidelines of the Board of Governors of the Federal Reserve). Outstanding principal and accrued and unpaid interest are due upon early redemption. In connection with the Private Placement, the Corporation obtained ratings from Kroll Bond Rating Agency (“KBRA”). KBRA assigned investment grade ratings of BBB+ and BBB for the Corporation’s senior unsecured debt and subordinated debt, respectively, and a senior deposit rating of A- for the Bank. These ratings were reaffirmed by KBRA on October 27, 2017. In March 2004, the Corporation issued $10.3 million of Floating Rate Junior Subordinated Deferrable Interest Debentures (the “Subordinated Debentures”) to PPBI Trust I, statutory trust created under the laws of the State of Delaware. The Subordinated Debentures are subordinated to effectively all borrowings of the Corporation and are due and payable on April 6, 2034. Interest is payable quarterly on the Subordinated Debentures at three-month LIBOR plus 2.75% per annum, for an effective rate of 4.47% per annum, as of March 31, 2018 . The Subordinated Debentures may be redeemed, in part or whole, on or after April 7, 2009 at the option of the Corporation, at par. The Subordinated Debentures can also be redeemed at par if certain events occur that impact the tax treatment of the capital treatment of the issuance. The Corporation also purchased a 3% minority interest totaling $310,000 in PPBI Trust I. The balance of equity of PPBI Trust I is comprised of mandatorily redeemable securities (“Trust Preferred Securities”) and is included in other assets. PPBI Trust I sold $10,000,000 of Trust Preferrred Securities to investors in a private offering. On April 1, 2017, as part of the Heritage Oaks acquisition, the Corporation assumed $5.2 million of floating rate junior subordinated debt securities associated with Heritage Oaks Capital Trust II. Interest is payable quarterly at three-month LIBOR plus 1.72% per annum, for an effective rate of 3.41% per annum as of March 31, 2018 . At March 31, 2018 , the carrying value of these debentures was $3.9 million , which reflects purchase accounting fair value adjustments of $1.3 million . The Corporation also assumed $3.1 million and $5.2 million of floating rate junior subordinated debt associated with Mission Community Capital Trust I and Santa Lucia Bancorp (CA) Capital Trust, respectively. At March 31, 2018 , the carrying value of Mission Community Capital Trust I and Santa Lucia Bancorp (CA) Capital Trust were $2.8 million and $3.8 million , respectively, which reflects purchase accounting fair value adjustments of $321,000 and $1.4 million , respectively. Interest is payable quarterly at three-month LIBOR plus 2.95% per annum, for an effective rate of 4.67% per annum as of March 31, 2018 for Mission Community Capital Trust I. Interest is payable quarterly at three-month LIBOR plus 1.48% per annum, for an effective rate of 3.20% per annum as of March 31, 2018 for Santa Lucia Bancorp (CA) Capital Trust. These three debentures are callable by the Corporation at par. On November 1, 2017, as part of the Plaza acquisition, the Company assumed three subordinated notes totaling $25 million at a fixed interest rate of 7.125% payable in arrears on a quarterly basis. The notes have a maturity date of June 26, 2025 and are also redeemable in whole or in part from time to time beginning in June 26, 2020 at an amount equal to 103.0% of principal plus accrued unpaid interest. The redemption price decreases 50 basis points each subsequent year. The Corporation is not allowed to consolidate any trust preferred securities into the Company’s consolidated financial statements. The resulting effect on the Company’s consolidated financial statements is to report only the subordinated debentures relating to trust preferred securities as a component of the Company’s liabilities.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share excludes dilution and is computed by dividing net income or loss available to common stockholders by the weighted average number of common shares outstanding for the period, excluding common shares in treasury. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted from the issuance of common stock that would then share in earnings and excludes common shares in treasury. Stock options exercisable for shares of common stock are excluded from the computation of diluted earnings per share if they are anti-dilutive due to their exercise price exceeding the average market price during the period. The impact of stock options, which are anti-dilutive are excluded from the computations of diluted earnings per share. The dilutive impact of these securities could be included in future computations of diluted earnings per share if the market price of the common stock increases. The following table sets forth the weighted average number of stock options excluded for the periods indicated: Three Months Ended March 31, December 31, March 31, 2018 2017 2017 Weighted average stock options excluded — 1,228 — The following tables set forth the Company’s earnings per share calculations for the periods indicated: Three Months Ended March 31, 2018 December 31, 2017 March 31, 2017 Net Shares Per Share Net Shares Per Share Net Shares Per Share (dollars in thousands, except per share data) Net income $ 28,002 $ 16,171 $ 9,521 Basic income available to common stockholders 28,002 45,893,496 $ 0.61 16,171 43,797,403 $ 0.37 9,521 27,528,940 $ 0.35 Dilutive effect of share-based compensation — 758,563 — 816,945 — 668,280 Diluted income available to common stockholders plus assumed conversions $ 28,002 46,652,059 $ 0.60 $ 16,171 44,614,348 $ 0.36 $ 9,521 28,197,220 $ 0.34

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The fair value of an asset or liability is the exchange price that would be received to sell that asset or paid to transfer that liability (exit price) in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including both those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis and a non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value are discussed below. In accordance with accounting guidance, the Company groups its financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described as follows: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market. Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature, and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the fair values presented. Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Management maximizes the use of observable inputs and attempts to minimize the use of unobservable inputs when determining fair value measurements. Estimated fair values are disclosed for financial instruments for which it is practicable to estimate fair value. These estimates are made at a specific point in time based on relevant market data and information about the financial instruments. These estimates do not reflect any premium or discount that could result from offering the Company’s entire holdings of a particular financial instrument for sale at one time, nor do they attempt to estimate the value of anticipated future business related to the instruments. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of these estimates. The following is a description of both the general and specific valuation methodologies used for certain instruments measured at fair value, as well as the general classification of these instruments pursuant to the valuation hierarchy. Investment securities – Investment securities are generally valued based upon quotes obtained from independent third-party pricing services, which uses evaluated pricing applications and model processes. Observable market inputs, such as, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data are considered as part of the evaluation. The inputs are related directly to the security being evaluated, or indirectly to a similarly situated security. Market assumptions and market data are utilized in the valuation models. The Company reviews the market prices provided by the third-party pricing service for reasonableness based on the Company’s understanding of the market place and credit issues related to the securities. The Company has not made any adjustments to the market quotes provided by them and, accordingly, the Company categorized its investment portfolio within Level 2 of the fair value hierarchy. Impaired Loans and Other Real Estate Owned – A loan is considered impaired when it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement. Impairment is measured based on the fair value of the underlying collateral or the discounted expected future cash flows. The Company measures impairment on all non-accrual loans for which it has reduced the principal balance to the value of the underlying collateral less the anticipated selling cost. As such, the Company records impaired loans as Level 3. At March 31, 2018 , substantially all the Company’s impaired loans were evaluated based on the fair value of their underlying collateral based upon the most recent appraisal available to management and has concluded no reserves or write-downs are necessary. The fair value of impaired loans and other real estate owned were determined using Level 3 assumptions, and represents impaired loan and other real estate loan balances for which a specific reserve has been established or on which a write down has been taken. Generally, the Company obtains third party appraisals (or property valuations) and/or collateral audits in conjunction with internal analysis based on historical experience on its impaired loans and other real estate owned to determine fair value. In determining the net realizable value of the underlying collateral for impaired loans, the Company will then discount the valuation to cover both market price fluctuations and selling costs the Company expected would be incurred in the event of foreclosure. In addition to the discounts taken, the Company’s calculation of net realizable value considered any other senior liens in place on the underlying collateral. The fair value estimates presented herein are based on pertinent information available to management as of the periods indicated, representing an exit price. At March 31, 2018 Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value (dollars in thousands) Assets: Cash and cash equivalents $ 128,996 $ 128,996 $ — $ — $ 128,996 Interest-bearing time deposits with financial institutions 3,693 3,693 — — 3,693 Investments held-to-maturity 24,559 — 23,915 — 23,915 Investment securities available-for-sale 863,243 — 863,243 — 863,243 FHLB, FRB and other stock 82,115 N/A N/A N/A N/A Loans held for sale 29,034 — 31,255 — 31,255 Loans held for investment, net 6,241,841 — — 6,254,567 6,254,567 Derivative asset 2,717 — 2,717 — 2,717 Accrued interest receivable 27,073 27,073 — — 27,073 Liabilities: Deposit accounts 6,192,273 5,074,330 1,109,351 — 6,183,681 FHLB advances 439,647 — 438,664 — 438,664 Other borrowings 43,876 — 43,991 — 43,991 Subordinated debentures 105,188 — 115,544 — 115,544 Derivative liability 2,717 — 2,717 — 2,717 Accrued interest payable 1,638 1,638 — — 1,638 At December 31, 2017 Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value (dollars in thousands) Assets: Cash and cash equivalents $ 200,064 $ 200,064 $ — $ — $ 200,064 Interest-bearing time deposits with financial institutions 3,693 3,693 — — 3,693 Investments held-to-maturity 18,291 — 18,082 — 18,082 Investment securities available-for-sale 787,429 — 787,429 — 787,429 FHLB, FRB and other stock 65,881 N/A N/A N/A N/A Loans held for sale 23,426 — 23,524 — 23,524 Loans held for investment, net (1) 6,167,532 — — 6,269,366 6,269,366 Derivative asset 1,135 — 1,135 — $ 1,135 Accrued interest receivable 27,053 27,053 — — 27,053 Liabilities: Deposit accounts 6,085,868 5,001,053 1,074,564 — 6,075,617 FHLB advances 490,148 — 489,823 — 489,823 Other borrowings 46,139 — 46,373 — 46,373 Subordinated debentures 105,123 — 115,159 — 115,159 Derivative liability 1,135 — 1,135 — 1,135 Accrued interest payable 2,131 2,131 — — 2,131 (1) The estimated fair value of loans held for investment, net for December 31, 2017 is not based on an exit price assumption. The following fair value hierarchy table presents information about the Company’s financial instruments measured at fair value on a recurring basis at the dates indicated: March 31, 2018 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ — $ 44,164 $ — $ 44,164 Corporate — 104,406 — 104,406 Municipal bonds — 223,657 — 223,657 Collateralized mortgage obligation — 31,709 — 31,709 Mortgage-backed securities — 459,307 — 459,307 Total securities available-for-sale $ — $ 863,243 $ — $ 863,243 December 31, 2017 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ — $ 47,209 $ — $ 47,209 Corporate — 79,546 — 79,546 Municipal bonds — 232,128 — 232,128 Collateralized mortgage obligation — 33,781 — 33,781 Mortgage-backed securities — 394,765 — 394,765 Total securities available-for-sale $ — $ 787,429 $ — $ 787,429 The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure	Derivative Instruments From time to time, the Company enters into interest rate swap agreements with certain borrowers to assist them in mitigating their interest rate risk exposure associated with the loans they have with the Company. At the same time, the Company enters into identical interest rate swap agreements with another financial institution to mitigate the Company’s interest rate risk exposure associated with the swap agreements it enters into with its borrowers. The Company had swaps with matched terms with an aggregate notional amount of $58.2 million and a fair value of $2.7 million at March 31, 2018 and an aggregate notional amount of $58.6 million and a fair value of $1.1 million at December 31, 2017 . The fair values of these swaps are recorded as components of other assets and other liabilities in the Company’s condensed consolidated balance sheet. Changes in the fair value of these swaps, which occur due to changes in interest rates, are recorded in the Company’s income statement as a component of noninterest income. Since the terms of the swap agreements between the Company and its borrowers have been matched with the terms of swap agreements with another financial institution, the adjustments for the change in their fair value offset each other in non-interest income. Although changes in the fair value of swap agreements between the Company and borrowers and the Company and other financial institutions offset each other, changes in the credit risk of these counterparties may result in a difference in the fair value of these swap agreements. Offsetting swap agreements the Company has with other financial institutions are collateralized with cash, and swap agreements with borrowers are secured by the collateral arrangements for the underlying loans these borrowers have with the Company. During the three months ended March 31, 2018 and December 31, 2017 , there were no losses recorded on swap agreements, attributable to the change in credit risk associated with a counterparty. All interest rate swap agreements entered into by the Company as of March 31, 2018 and December 31, 2017 are not designated as hedging instruments. The following tables summarize the Company's derivative instruments, included in "other assets" and "other liabilities" in the consolidated statements of financial condition: March 31, 2018 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 58,150 $ 2,717 $ 58,150 $ 2,717 Total derivative instruments $ 58,150 $ 2,717 $ 58,150 $ 2,717 December 31, 2017 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 58,599 $ 1,135 $ 58,599 $ 1,135 Total derivative instruments $ 58,599 $ 1,135 $ 58,599 $ 1,135

Balance Sheet Offsetting

Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2018
Offsetting [Abstract]
Balance Sheet Offsetting	Balance Sheet Offsetting Derivative financial instruments may be eligible for offset in the consolidated balance sheets, such as those subject to enforceable master netting arrangements or a similar agreement. Under these agreements, the Company has the right to net settle multiple contracts with the same counterparty. The Company offers an interest rate swap product to qualified customers, which are then paired with derivative contracts the Company enters into with a counterparty bank. While derivative contracts entered into with counterparty banks may be subject to enforceable master netting agreements, derivative contracts with customers may not be subject to enforceable master netting arrangements. Financial instruments that are eligible for offset in the consolidated statements of financial condition as of March 31, 2018 are presented in the table below: Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (dollars in thousands) March 31, 2018 Financial assets: Derivatives not designated as $ 2,717 $ — $ 2,717 — $ — $ 2,717 Total $ 2,717 $ — $ 2,717 — $ — $ 2,717 Financial liabilities: Derivatives not designated as $ 2,717 — $ 2,717 — — $ 2,717 Total $ 2,717 — $ 2,717 — — $ 2,717 (1) Represents cash collateral held with counterparty bank. Financial instruments that are eligible for offset in the consolidated statements of financial condition as of December 31, 2017 are presented in the table below: Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (dollars in thousands) December 31, 2017 Financial assets: Derivatives not designated as $ 1,833 $ (698 ) $ 1,135 — $ — $ 1,135 Total $ 1,833 $ (698 ) $ 1,135 — $ — $ 1,135 Financial liabilities: Derivatives not designated as $ 1,135 — $ 1,135 — — $ 1,135 Total $ 1,135 — $ 1,135 — — $ 1,135 (1) Represents cash collateral held with counterparty bank.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Pacific Premier Bancorp, Inc. and Grandpoint Capital, Inc. On February 9, 2018, we entered into a definitive agreement with Grandpoint Capital, Inc. ("Grandpoint") to acquire Grandpoint and its wholly-owned, California-chartered state bank subsidiary, Grandpoint Bank. Grandpoint is headquartered in Los Angeles, California with $3.2 billion in total assets, $2.4 billion in gross loans and $2.4 billion in total deposits at December 31, 2017. Grandpoint operates 14 regional offices in Southern California, Arizona and Vancouver, Washington. Under the terms of the definitive agreement, each share of Grandpoint common stock will be converted into the right to receive 0.4750 shares of Company common stock. The proposed transaction is expected to close in the third quarter of 2018, subject to satisfaction of customary closing conditions, including regulatory approvals and approval of Grandpoint’s and the Corporation’s shareholders. Certain Grandpoint shareholders, as well as Grandpoint's directors and executive officers have entered into agreements with the Corporation pursuant to which they have committed to provide written consents with respect to Grandpoint's common stock in favor of the acquisition.

Significant Accounting Polici22

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Recently Issued Accounting Pronouncements	Accounting Standards Adopted in 2018 In February 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . On December 22, 2017, the Tax Cuts and Jobs Act of 2017 was signed into law, which among other things reduced the maximum federal corporate tax rate from 35% to 21%. This Update addresses concerns about the guidance in current U.S. GAAP that requires deferred tax liabilities and assets to be adjusted for the effect of a change in tax laws or rates with the effect included in income from continuing operations in the reporting period that includes the enactment date. That guidance is applicable even in situations in which the related income tax effects of items in accumulated other comprehensive income ("AOCI") were originally recognized in other comprehensive income (rather than in income from continuing operations). As a result of the adjustment of deferred taxes being required to be included in income from continuing operations, the tax effects of items within accumulated other comprehensive income (referred to as stranded tax effects for purposes of this Update) do not reflect the appropriate tax rate. This Update allows for an election to reclass between retained earnings and AOCI the impact of the federal income tax rate change. The amendments in this Update are effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption of the amendments of this Update is permitted. The Company elected to early adopt in the first quarter of 2018. Accordingly, the Company recorded an increase to AOCI and a decrease to retain earnings of approximately $82,000 for stranded tax effects on investment available for sale securities in the first quarter of 2018. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . Under the current implementation guidance in Topic 805, there are three elements of a business-inputs, processes, and outputs. While an integrated set of assets and activities (collectively referred to as a “set”) that is a business usually has outputs, outputs are not required to be present. In addition, all the inputs and processes that a seller uses in operating a set are not required if market participants can acquire the set and continue to produce outputs. The amendments in this Update provide a screen to determine when a set is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated. If the screen is not met, the amendments in this Update (1) require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and (2) remove the evaluation of whether a market participant could replace missing elements. The amendments provide a framework to assist entities in evaluating whether both an input and a substantive process are present. The framework includes two sets of criteria to consider that depend on whether a set has outputs. Although outputs are not required for a set to be a business, outputs generally are a key element of a business; therefore, the Company has developed more stringent criteria for sets without outputs. Lastly, the amendments in this Update narrow the definition of the term output so that the term is consistent with how outputs are described in Topic 606. Public business entities should apply the amendments in this Update to annual periods beginning after December 15, 2017, including interim periods within those periods. The adoption of this standard did not have a material effect on the Company's operating results or financial condition. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash . The Update requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The adoption of this standard did not have a material effect on the Company's operating results or financial condition. In August 2016, the FASB issued ASU 2016-15, Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments . The Update provides guidance on eight specific cash flow classification issues, which include: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments or debt with coupon interest rates that are insignificant in relation to the effective interest rate; 3) contingent consideration payments made soon after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investments; 7) beneficial interest in securitization transactions; and 8) separately identifiable cash flows and the application of the predominance principle. The amendments in this Update are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period; however, an entity is required to adopt all of the amendments in the same period. The amendments in this Update should be applied using a retrospective transition method to each period presented. The adoption of this standard did not have a material effect on the Company's operating results or financial condition. In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities . Changes made to the current measurement model primarily affect the accounting for equity securities with readily determinable fair values, where changes in fair value will impact earnings instead of other comprehensive income. The accounting for other financial instruments, such as loans, investments in debt securities, and financial liabilities is largely unchanged. The Update also changes the presentation and disclosure requirements for financial instruments including a requirement that public business entities use exit price when measuring the fair value of financial instruments measured at amortized cost for disclosure purposes. This Update is effective for public business entities in fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-01 did not have a material effect on the Company's operating results or financial condition. In accordance with the guidance, the Company measures the fair value of financial instruments reported at amortized cost on the statement of financial condition using the exit price notion. For further details, refer to Note 10 - Fair Value of Financial instruments. ASU 2014-09, Revenue From Contracts With Customers (Topic 606) , ASU 2015-14 Revenue from Contracts with Customers (Topic 606): Deferral of Effective Date , ASU 2016-08 Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) , ASU 2016-10 Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , ASU 2016-11 Revenue Recognition (Topic 605) and Derivatives ad Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting , ASU 2016-12 Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients , and ASU 2016-20 Revenue from Contracts with Customers (Topic 606): Technical Corrections and Improvements to Topic 606 . The FASB amended existing guidance related to revenue from contracts with customers, superseding and replacing nearly all existing revenue recognition guidance, including industry-specific guidance, establishing a new control-based revenue recognition model, changing the basis for deciding when revenue is recognized over time or at a point in time, providing new and more detailed guidance on specific topics and expanding and improving disclosures about revenue. In addition, this guidance specifies the accounting for some costs to obtain or fulfill a contract with a customer. The amendments are effective for public entities for annual reporting periods beginning after December 15, 2017. The Company adopted the provisions of ASU 2014-09 and its related amendments effective January 1, 2018 utilizing the modified retrospective transition method and determined the adoption was insignificant to the financial statements. Since the impact upon adoption of ASU 2014-09 was insignificant to the financial statements, a cumulative effect adjustment to retained earnings was not deemed necessary. The Company's review of its various revenue streams indicated that approximately 97% of the Company’s revenue is out of the scope of ASU 2014-09, including all of the Company’s net interest income and a significant portion of non-interest income. For those revenue streams that are within the scope of ASU 2014-09, the Company reviewed the associated customer contracts and agreements to determine the appropriate accounting for revenues under those contracts. The Company’s review did not identify any significant changes in the timing of revenue recognition under those contracts within the scope of ASU 2014-09. Significant revenue streams that are within scope primarily relate to service charges and fees associated customer deposit accounts, as well as fees for various other services the Company provides its customers. As a result of the implementation of ASU 2014-09, the Company will conduct a detailed review of its revenue streams at least annually, or more frequently if deemed necessary. Recent Accounting Guidance Not Yet Effective In March 2017, the FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchase Callable Debt Securities. The updated amends guidance on the amortization period of premiums on certain purchased callable debt securities. The amendments shorten the amortization period of premiums on purchased callable debt securities to the earliest call date. The update should be applied on a modified retrospective basis through a cumulative-effect adjustment to beginning retained earnings. The effective date of ASU 2017-08 is for interim and annual reporting periods beginning after December 15, 2018. The adoption of this standard is not expected to have a material effect on the Company's operating results or financial condition. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . The amendments replace the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. For public business entities, the amendment is effective for annual periods beginning after December 15, 2019 and interim period within those annual periods. The Company is currently evaluating the effects of ASU 2016-13 on its financial statements and disclosures. The Company is in the process of compiling key data elements and implementing a software model that will meet the requirements of the new guidance. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The new standard is being issued to increase the transparency and comparability around lease obligations. Previously unrecorded off-balance sheet obligations will now be brought more prominently to light by presenting lease liabilities on the face of the balance sheet, accompanied by enhanced qualitative and quantitative disclosures in the notes to the financial statements. The Update is generally effective for public business entities in fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently in the process of evaluating existing lease obligations and service agreements under the provisions of the new standard. This evaluation includes an assessment of the appropriate classification and related accounting of each lease agreement under the new standard, a review of applicability of the new standard to existing service agreements, and gathering all essential lease data that will facilitate the application of the new standard. Upon adoption of the new standard, the Company will record a liability representing an obligation to make future lease payments and will also record an asset representing rights to use the underlying leased assets. As of March 31, 2018, the Company believes these assets and liabilities to be recognized under the new standard will amount to less than 1% of the Company's total assets.
Revenue Recognition	Revenue Recognition - The Company accounts for certain of its revenue streams in accordance with ASC 606 - Revenue from Contracts with Customers . Revenue streams within the scope of and accounted for under ASC 606 include: service charges and fees on deposit accounts, debit card interchange fees, fees from other services the Bank provides its customers, and gains and losses from the sale of other real estate owned and property, premises and equipment. ASC 606 requires revenue to be recognized when the Company satisfies related performance obligations by transferring to the customer a good or service. The recognition of revenue under ASC 606 requires the Company to first identify the contract with the customer, identify the performance obligations, determine the transaction price, allocate the transaction price to the performance obligations, and finally recognize revenue when the performance obligations have been satisfied and the good or service has been transferred. The majority of the Company’s contracts with customers associated with revenue streams that are within the scope of ASC 606 are considered short-term in nature and can be cancelled at any time by the customer or the Bank, such as a deposit account agreement. Other more significant revenue streams for the Company such as interest income on loans and investment securities are specifically excluded from the scope of ASC 606 and are accounted for under other applicable GAAP. The following provides information concerning the components of noninterest income: • Loan servicing fees - generally consist of fees related to servicing of loans for others, as well as the net impact of related serving asset amortization. This revenue stream is excluded from the scope of ASC 606 and is accounted for under other applicable GAAP. Loan servicing fees totaled $345,000 or approximately 0.4% of total revenues for the three months ended March 31, 2018. • Service charges on deposit accounts and other service fee income - consist of periodic service charges on deposit accounts and transaction based fees such as those related to overdrafts, ATM charges and wire transfer fees. Performance obligations for periodic service charges on deposit accounts are typically short term in nature and are generally satisfied on a monthly basis, while performance obligations for other transaction based fees are typically satisfied at a point in time (which may consist of only a few moments to perform the service or transaction) with no further obligations on behalf of the Bank to the customer. Periodic service charges are generally collected monthly directly from the customer's deposit account, and at the end of a statement cycle, while transaction based service charges are typically collected at the time of or soon after the service is performed. Service charges on deposit accounts and other service fee income are accounted for under ASC 606 and totaled $1.3 million or approximately 1.5% of total revenues for the three months ended March 31, 2018. • Debit card interchange fee income - consist of transaction processing fees associated with customer debit card transactions processed through a payment network. The related performance obligations are generally satisfied when the customer transactions, which generate the fee, are processed. Debit card interchange income is accounted for under ASC 606 and totaled $1.0 million or approximately 1.2% of total revenues for the three months ended March 31, 2018. • Earnings on bank-owned life insurance - relates to the periodic increase in the cash surrender value of bank-owned life insurance policies. This revenue stream is excluded from the scope of ASC 606, and is accounted for under other applicable GAAP (ASC 325-30). Earnings on bank-owned life insurance total $611,000 or 0.7% of total revenues for the three months ended March 31, 2018. • Gains (losses) on the sale of loans and investment securities - gains (losses) from the periodic sale of loans and investment securities are excluded from the scope of ASC 606 and are accounted for under other applicable GAAP. Net gains from the sale of loans and investment securities totaled $3.0 million or 3.3% of total revenues for the three months ended March 31, 2018. • Other income - generally consists of recoveries on acquired loans, which were fully charged off and had no book value prior to their acquisition. This revenue stream is excluded from the scope of ASC 606 and is accounted for under other applicable GAAP. Other income also consists of other miscellaneous fees, which are accounted for under ASC 606, however, much like service charges on deposit accounts, these fees have performance obligations that are very short term in nature and are typically satisfied at a point in time. Revenues included in other income that are accounted for under ASC 606 totaled $300,000 or approximately 0.3% of total revenues for the three months ended March 31, 2018. Revenues included in other income that are accounted for under other applicable GAAP totaled $1.1 million or 1.3% of total revenues for the three months ended March 31, 2018. Other revenue streams that may be applicable to the Company include gains and losses from the sale of non-financial assets such as other real estate owned and property premises and equipment. The Company accounts for these revenue streams in accordance with ASC 610-20, which requires the Company to look to guidance in ASC 606 in the application of certain measurement and recognition concepts. The Company records gains and losses on the sale of non-financial assets when control of the asset has been surrendered to the buyer, which generally occurs at a specific point in time.
Certain Acquired Loans	Certain Acquired Loans –As part of business acquisitions, the Bank acquires certain loans that have shown evidence of credit deterioration since origination. These acquired loans are recorded at the allocated fair value, such that there is no carryover of the seller’s allowance for loan losses. Such acquired loans are accounted for individually. The Bank estimates the amount and timing of expected cash flows for each purchased loan, and the expected cash flows in excess of the allocated fair value is recorded as interest income over the remaining life of the loan (accretable yield). The excess of the loan’s contractual principal and interest over expected cash flows is not recorded (non-accretable difference). Over the life of the loan, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded through the allowance for loan losses. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income.
Goodwill and Core Deposit Intangible	Goodwill and Core Deposit Intangible –Goodwill is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually or more frequently if events and circumstances exist that indicate the necessity for such impairment tests to be performed. The Company has selected November 30 as the date to perform the annual impairment test. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on our balance sheet. Core deposit intangible assets arising from whole bank acquisitions are amortized on either an accelerated basis, reflecting the pattern in which the economic benefits of the intangible assets is consumed or otherwise used up, or on a straight-line amortization method over their estimated useful lives, which range from 6 to 10 years .
Use of Estimates	Use of Estimates –The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Fair Value Measurement	The fair value of an asset or liability is the exchange price that would be received to sell that asset or paid to transfer that liability (exit price) in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including both those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis and a non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value are discussed below. In accordance with accounting guidance, the Company groups its financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described as follows: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market. Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature, and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the fair values presented. Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Management maximizes the use of observable inputs and attempts to minimize the use of unobservable inputs when determining fair value measurements. Estimated fair values are disclosed for financial instruments for which it is practicable to estimate fair value. These estimates are made at a specific point in time based on relevant market data and information about the financial instruments. These estimates do not reflect any premium or discount that could result from offering the Company’s entire holdings of a particular financial instrument for sale at one time, nor do they attempt to estimate the value of anticipated future business related to the instruments. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of these estimates. The following is a description of both the general and specific valuation methodologies used for certain instruments measured at fair value, as well as the general classification of these instruments pursuant to the valuation hierarchy. Investment securities – Investment securities are generally valued based upon quotes obtained from independent third-party pricing services, which uses evaluated pricing applications and model processes. Observable market inputs, such as, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data are considered as part of the evaluation. The inputs are related directly to the security being evaluated, or indirectly to a similarly situated security. Market assumptions and market data are utilized in the valuation models. The Company reviews the market prices provided by the third-party pricing service for reasonableness based on the Company’s understanding of the market place and credit issues related to the securities. The Company has not made any adjustments to the market quotes provided by them and, accordingly, the Company categorized its investment portfolio within Level 2 of the fair value hierarchy. Impaired Loans and Other Real Estate Owned – A loan is considered impaired when it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement. Impairment is measured based on the fair value of the underlying collateral or the discounted expected future cash flows. The Company measures impairment on all non-accrual loans for which it has reduced the principal balance to the value of the underlying collateral less the anticipated selling cost. As such, the Company records impaired loans as Level 3. At March 31, 2018 , substantially all the Company’s impaired loans were evaluated based on the fair value of their underlying collateral based upon the most recent appraisal available to management and has concluded no reserves or write-downs are necessary. The fair value of impaired loans and other real estate owned were determined using Level 3 assumptions, and represents impaired loan and other real estate loan balances for which a specific reserve has been established or on which a write down has been taken. Generally, the Company obtains third party appraisals (or property valuations) and/or collateral audits in conjunction with internal analysis based on historical experience on its impaired loans and other real estate owned to determine fair value. In determining the net realizable value of the underlying collateral for impaired loans, the Company will then discount the valuation to cover both market price fluctuations and selling costs the Company expected would be incurred in the event of foreclosure. In addition to the discounts taken, the Company’s calculation of net realizable value considered any other senior liens in place on the underlying collateral.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Schedule of assets acquired and liabilities assumed and the provisional fair value adjustments and amounts recorded	The following table represents the assets acquired and liabilities assumed of HEOP as of April 1, 2017 and the fair value adjustments and amounts recorded by the Company in 2017 under the acquisition method of accounting: HEOP Book Value Fair Value Adjustments Fair Value ASSETS ACQUIRED (dollars in thousands) Cash and cash equivalents $ 78,728 $ — $ 78,728 Investment securities 447,520 (4,597 ) 442,923 Loans, gross 1,387,949 (23,300 ) 1,364,649 Allowance for loan losses (17,200 ) 17,200 — Fixed assets 35,567 (665 ) 34,902 Core deposit intangible — 28,123 28,123 Deferred tax assets 17,850 (6,567 ) 11,283 Other assets 55,223 (9 ) 55,214 Total assets acquired $ 2,005,637 $ 10,185 $ 2,015,822 LIABILITIES ASSUMED Deposits 1,668,079 1,471 1,669,550 Borrowings 141,996 (2,962 ) 139,034 Other Liabilities 7,290 771 8,061 Total liabilities assumed 1,817,365 (720 ) 1,816,645 Excess of assets acquired over liabilities assumed $ 188,272 $ 10,905 199,177 Consideration paid 468,131 Goodwill recognized $ 268,954 The following table represents the assets acquired and liabilities assumed of Plaza as of November 1, 2017 and the fair value adjustments and amounts recorded by the Company in 2017 under the acquisition method of accounting, which are subject to adjustment for up to one year after the merger date: Plaza Fair Value Adjustments Fair Value ASSETS ACQUIRED (dollars in thousands) Cash and cash equivalents $ 150,459 $ — $ 150,459 Loans, gross 1,069,359 (6,458 ) 1,062,901 Allowance for loan losses (13,009 ) 13,009 — Fixed assets 7,389 (194 ) 7,195 Core deposit intangible 198 11,382 11,580 Deferred tax assets 11,849 (6,859 ) 4,990 Other assets 19,495 (330 ) 19,165 Total assets acquired $ 1,245,740 $ 10,550 $ 1,256,290 LIABILITIES ASSUMED Deposits $ 1,081,727 $ 1,224 $ 1,082,951 Borrowings 40,755 397 41,152 Other Liabilities 8,956 (622 ) 8,334 Total liabilities assumed 1,131,438 999 1,132,437 Excess of assets acquired over liabilities assumed $ 114,302 $ 9,551 123,853 Consideration paid 245,761 Goodwill recognized $ 121,908
Schedule of contractual amounts due, expected cash flows to be collected, interest component and fair value as of the respective acquisition dates	For loans acquired from Plaza and HEOP, the contractual amounts due, expected cash flows to be collected, interest component and fair value as of the respective acquisition dates were as follows: Acquired Loans Plaza HEOP (dollars in thousands) Contractual amounts due $ 1,708,685 $ 1,717,191 Cash flows not expected to be collected 20,152 4,442 Expected cash flows 1,688,533 1,712,749 Interest component of expected cash flows 625,592 348,100 Fair value of acquired loans $ 1,062,941 $ 1,364,649
Summary of pro forma net interest and other income, net income and earnings per share	There were no material, nonrecurring adjustments to the pro forma net interest and other income, net income and earnings per share presented below: Three Months Ended March 31, December 31, March 31, 2018 2017 2017 (dollars in thousands) Net interest and other income $ 86,694 $ 90,469 $ 77,840 Net income 28,002 12,189 13,771 Basic earnings per share 0.61 0.27 0.30 Diluted earnings per share 0.60 0.26 0.30

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost and estimated fair value of securities	The amortized cost and estimated fair value of securities were as follows: March 31, 2018 Amortized Cost Unrealized Gain Unrealized Loss Estimated Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ 44,208 $ 60 $ (104 ) $ 44,164 Corporate 103,671 1,084 (349 ) 104,406 Municipal bonds 225,201 1,522 (3,066 ) 223,657 Collateralized mortgage obligation: residential 32,223 97 (611 ) 31,709 Mortgage-backed securities: residential 470,502 111 (11,306 ) 459,307 Total investment securities available-for-sale 875,805 2,874 (15,436 ) 863,243 Investment securities held-to-maturity: Mortgage-backed securities: residential 23,434 — (644 ) 22,790 Other 1,125 — — 1,125 Total investment securities held-to-maturity 24,559 — (644 ) 23,915 Total investment securities $ 900,364 $ 2,874 $ (16,080 ) $ 887,158 December 31, 2017 Amortized Cost Unrealized Gain Unrealized Loss Estimated Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ 47,051 $ 236 $ (78 ) $ 47,209 Corporate 78,155 1,585 (194 ) 79,546 Municipal bonds 228,929 3,942 (743 ) 232,128 Collateralized mortgage obligation: residential 33,984 132 (335 ) 33,781 Mortgage-backed securities: residential 398,664 266 (4,165 ) 394,765 Total investment securities available-for-sale 786,783 6,161 (5,515 ) 787,429 Investment securities held-to-maturity: Mortgage-backed securities: residential 17,153 — (209 ) 16,944 Other 1,138 — — 1,138 Total investment securities held-to-maturity 18,291 — (209 ) 18,082 Total investment securities $ 805,074 $ 6,161 $ (5,724 ) $ 805,511
Schedule of number, fair value and gross unrealized holding losses of the Company's investment securities by investment category and length of time that the securities have been in a continuous loss position	The table below shows the number, fair value and gross unrealized holding losses of the Company’s investment securities by investment category and length of time that the securities have been in a continuous loss position. March 31, 2018 Less than 12 months 12 months or Longer Total Number Fair Value Gross Unrealized Holding Losses Number Fair Value Gross Unrealized Holding Losses Number Fair Value Gross Unrealized Holding Losses (dollars in thousands) Investment securities available-for-sale: Agency 19 $ 42,806 $ (82 ) 1 $ 1,358 $ (22 ) 20 $ 44,164 $ (104 ) Corporate 22 98,346 (210 ) 2 6,060 (139 ) 24 104,406 (349 ) Municipal bonds 289 207,591 (1,960 ) 32 16,066 (1,106 ) 321 223,657 (3,066 ) Collateralized mortgage obligation: residential 11 23,452 (351 ) 3 8,257 (260 ) 14 31,709 (611 ) Mortgage-backed securities: residential 105 355,559 (6,875 ) 42 103,748 (4,431 ) 147 459,307 (11,306 ) Total investment securities available-for-sale 446 727,754 (9,478 ) 80 135,489 (5,958 ) 526 863,243 (15,436 ) Investment securities held-to-maturity: Mortgage-backed securities: residential 4 16,773 (421 ) 1 6,017 (223 ) 5 22,790 (644 ) Total investment securities held-to-maturity 4 16,773 (421 ) 1 6,017 (223 ) 5 22,790 (644 ) Total investment securities 450 $ 744,527 $ (9,899 ) 81 $ 141,506 $ (6,181 ) 531 $ 886,033 $ (16,080 ) December 31, 2017 Less than 12 months 12 months or Longer Total Number Fair Gross Number Fair Gross Number Fair Gross (dollars in thousands) Investment securities available-for-sale: Agency 6 $ 13,754 $ (78 ) — $ — $ — 6 $ 13,754 $ (78 ) Corporate 4 10,079 (64 ) 2 6,076 (130 ) 6 16,155 (194 ) Municipal bonds 103 61,313 (268 ) 30 15,658 (475 ) 133 76,971 (743 ) Collateralized mortgage obligation: residential 5 13,971 (149 ) 3 8,943 (186 ) 8 22,914 (335 ) Mortgage-backed securities: residential 66 220,951 (1,600 ) 41 110,062 (2,565 ) 107 331,013 (4,165 ) Total investment securities available-for-sale 184 320,068 (2,159 ) 76 140,739 (3,356 ) 260 460,807 (5,515 ) Investment securities held-to-maturity: Mortgage-backed securities: residential 2 10,745 (133 ) 1 6,198 (76 ) 3 16,943 (209 ) Total investment securities held-to-maturity 2 10,745 (133 ) 1 6,198 (76 ) 3 16,943 (209 ) Total investment securities 186 $ 330,813 $ (2,292 ) 77 $ 146,937 $ (3,432 ) 263 $ 477,750 $ (5,724 )
Schedule of amortized cost and estimated fair value of investment securities available for sale by contractual maturity	The amortized cost and estimated fair value of investment securities at March 31, 2018 , by contractual maturity are shown in the table below. One Year or Less More than One Year to Five Years More than Five Years to Ten Years More than Ten Years Total Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ — $ — $ — $ — $ 19,761 $ 19,726 $ 24,447 $ 24,438 $ 44,208 $ 44,164 Corporate — — — — 91,671 92,330 12,000 12,076 103,671 104,406 Municipal bonds 4,463 4,463 31,257 31,194 73,327 72,004 116,154 115,996 225,201 223,657 Collateralized mortgage obligation: residential — — — — 1,007 1,009 31,216 30,700 32,223 31,709 Mortgage-backed securities: residential 2,572 2,565 2,346 2,283 93,312 91,605 372,272 362,854 470,502 459,307 Total investment securities available-for-sale 7,035 7,028 33,603 33,477 279,078 276,674 556,089 546,064 875,805 863,243 Investment securities held-to-maturity: Mortgage-backed securities: residential — — — — — — 23,434 22,790 23,434 22,790 Other — — — — — — 1,125 1,125 1,125 1,125 Total investment securities held-to-maturity — — — — — — 24,559 23,915 24,559 23,915 Total investment securities $ 7,035 $ 7,028 $ 33,603 $ 33,477 $ 279,078 $ 276,674 $ 580,648 $ 569,979 $ 900,364 $ 887,158

Loans Held for Investment (Tabl

Loans Held for Investment (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Schedule of components of loans held for investment	The following table sets forth the composition of our loan portfolio in dollar amounts at the dates indicated: March 31, 2018 December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 1,062,385 $ 1,086,659 Franchise 692,846 660,414 Commercial owner occupied (1) 1,268,869 1,289,213 SBA 182,626 185,514 Agribusiness 149,256 116,066 Total business loans 3,355,982 3,337,866 Real estate loans Commercial non-owner occupied 1,227,693 1,243,115 Multi-family 817,963 794,384 One-to-four family (2) 266,324 270,894 Construction 319,610 282,811 Farmland 136,522 145,393 Land 34,452 31,233 Total real estate loans 2,802,564 2,767,830 Consumer loans Consumer loans 86,206 92,931 Gross loans held for investment (3) 6,244,752 6,198,627 Deferred loan origination costs/(fees) and premiums/(discounts), net (2,911 ) (2,159 ) Loans held for investment 6,241,841 6,196,468 Allowance for loan losses (30,502 ) (28,936 ) Loans held for investment, net $ 6,211,339 $ 6,167,532 Loans held for sale, at lower of cost or fair value $ 29,034 $ 23,426 ______________________________ (1) Secured by real estate. (2) Includes second trust deeds. (3) Total gross loans held for investment for March 31, 2018 and December 31, 2017 are net of the unaccreted fair value net purchase discounts of $24.5 million and $29.1 million , respectively.
Summary of loan portfolio by the Company's internal risk grading system	The following tables stratify the loan portfolio by the Company’s internal risk grading as of the periods indicated: Credit Risk Grades Pass Special Mention Substandard Doubtful Total Gross Loans March 31, 2018 (dollars in thousands) Business loans Commercial and industrial $ 1,041,457 $ 8,172 $ 12,756 $ — $ 1,062,385 Franchise 692,846 — — — 692,846 Commercial owner occupied 1,262,138 4,170 18,220 — 1,284,528 SBA 193,527 890 1,573 — 195,990 Agribusiness 136,139 — 13,117 — 149,256 Real estate loans Commercial non-owner occupied 1,226,642 — 1,051 — 1,227,693 Multi-family 816,506 — 1,457 — 817,963 One-to-four family 264,574 145 1,605 — 266,324 Construction 318,923 687 — — 319,610 Farmland 135,413 — 1,109 — 136,522 Land 34,221 — 231 — 34,452 Consumer loans Consumer loans 86,071 — 135 — 86,206 Totals $ 6,208,457 $ 14,064 $ 51,254 $ — $ 6,273,775 Credit Risk Grades Pass Special Substandard Doubtful Total Gross December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 1,063,452 $ 8,163 $ 15,044 $ — $ 1,086,659 Franchise 660,414 — — — 660,414 Commercial owner occupied 1,273,381 654 21,180 — 1,295,215 SBA 199,468 1 3,469 — 202,938 Agribusiness 108,143 4,079 3,844 — 116,066 Real estate loans Commercial non-owner occupied 1,242,045 — 1,070 — 1,243,115 Multi-family 794,156 — 228 — 794,384 One-to-four family 268,776 154 1,964 — 270,894 Construction 282,294 517 — — 282,811 Farmland 144,234 44 1,115 — 145,393 Land 30,979 — 254 — 31,233 Consumer loans Consumer loans 92,794 — 137 — 92,931 Totals $ 6,160,136 $ 13,612 $ 48,305 $ — $ 6,222,053
Schedule of delinquencies in the Company's loan portfolio	The following tables set forth delinquencies in the Company’s loan portfolio at the dates indicated: Days Past Due Current 30-59 60-89 90+ Total Gross Loans Non-accruing March 31, 2018 (dollars in thousands) Business loans Commercial and industrial $ 1,056,886 $ 5,241 $ 93 $ 165 $ 1,062,385 $ 1,067 Franchise 692,846 — — — 692,846 — Commercial owner occupied 1,280,900 153 — 3,475 1,284,528 3,475 SBA 194,064 785 991 150 195,990 1,218 Agribusiness 149,256 — — — 149,256 — Real estate loans Commercial non-owner occupied 1,227,693 — — — 1,227,693 — Multi-family 816,732 — — 1,231 817,963 1,231 One-to-four family 265,943 345 — 36 266,324 1,134 Construction 319,610 — — — 319,610 — Farmland 136,522 — — — 136,522 — Land 34,363 81 — 8 34,452 8 Consumer loans Consumer loans 86,206 — — — 86,206 16 Totals $ 6,261,021 $ 6,605 $ 1,084 $ 5,065 $ 6,273,775 $ 8,149 Days Past Due Current 30-59 60-89 90+ Total Gross Loans Non-accruing December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 1,085,770 $ 84 $ 570 $ 235 $ 1,086,659 $ 1,160 Franchise 660,414 — — — 660,414 — Commercial owner occupied 1,291,255 3,474 486 — 1,295,215 97 SBA 200,821 177 — 1,940 202,938 1,201 Agribusiness 116,066 — — — 116,066 — Real estate loans Commercial non-owner occupied 1,243,115 — — — 1,243,115 — Multi-family 792,603 1,781 — — 794,384 — One-to-four family 269,725 354 — 815 270,894 817 Construction 282,811 — — — 282,811 — Farmland 145,393 — — — 145,393 — Land 31,141 83 — 9 31,233 9 Consumer loans Consumer loans 92,880 11 — 40 92,931 — Totals $ 6,211,994 $ 5,964 $ 1,056 $ 3,039 $ 6,222,053 $ 3,284
Summary of Company's investment in impaired loans	The following tables provide a summary of the Company’s investment in impaired loans as of the period indicated: Impaired Loans Unpaid Principal Balance Recorded Investment With Specific Allowance Without Specific Allowance Specific Allowance for Impaired Loans (dollars in thousands) March 31, 2018 Business loans Commercial and industrial $ 1,520 $ 1,067 $ — $ 1,067 $ — Commercial owner occupied 3,598 3,475 — 3,475 — SBA 4,575 1,218 — 1,218 — Real estate loans Commercial non-owner occupied — — — — — Multi-family 1,231 1,231 — 1,231 — One-to-four family 1,178 1,134 — 1,134 — Land 35 8 — 8 — Consumer loans Consumer loans 17 16 — 16 — Totals $ 12,154 $ 8,149 $ — $ 8,149 $ — Impaired Loans Unpaid Principal Balance Recorded Investment With Specific Allowance Without Specific Allowance Specific Allowance for Impaired Loans (dollars in thousands) December 31, 2017 Business loans Commercial and industrial $ 1,585 $ 1,160 $ — $ 1,160 $ — Commercial owner occupied 98 97 97 — 55 SBA 4,329 1,201 — 1,201 — Real estate loans One-to-four family 849 817 — 817 — Land 35 9 — 9 — Totals $ 6,896 $ 3,284 $ 97 $ 3,187 $ 55 Impaired Loans Three Months Ended March 31, 2018 December 31, 2017 March 31, 2017 Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) (dollars in thousands) Business loans Commercial and industrial $ 1,181 $ — $ 1,112 $ — $ 200 $ 5 Commercial owner occupied 3,475 — 125 — 192 3 SBA 1,241 — 1,123 — 307 5 Real estate loans 821 — One-to-four family 1,024 — 341 — 116 3 Construction — — 4,069 — — — Land 8 — 9 — 14 1 Consumer loans Consumer loans $ 94 $ — — — — — Totals $ 7,844 $ — $ 6,779 $ — $ 829 $ 17 (1) Cash basis and accrual basis is materially the same.
Summary of additional detail on components of impaired loans	The following table provides additional detail on the components of impaired loans at the period end indicated: March 31, 2018 December 31, 2017 (dollars in thousands) Nonaccruing loans $ 8,149 $ 3,284 Accruing loans — — Total impaired loans $ 8,149 $ 3,284
Summary of Company's investment in purchased credit impaired loans	The Company has purchased loans, for which there was, at acquisition, evidence of deterioration of credit quality since origination and for which it was probable, at acquisition, that all contractually required payments would not be collected. The carrying amount of those loans is as follows: March 31, 2018 December 31, 2017 (dollars in thousands) Business loans Commercial and industrial $ 3,134 $ 3,310 Commercial owner occupied 1,016 1,262 SBA 69 1,802 Real estate loans Commercial non-owner occupied 1,122 1,650 One-to-four family — 255 Construction/Land 768 600 Consumer loans 10 10 Total purchase credit impaired $ 6,119 $ 8,889
Summary of accretable yield on purchased credit impaired	The following table summarizes the accretable yield on the purchased credit impaired loans for the three months ended March 31, 2018 , December 31, 2017 and March 31, 2017 . Three Months Ended March 31, 2018 December 31, 2017 March 31, 2017 (dollars in thousands) Balance at the beginning of period $ 3,019 $ 3,148 $ 3,747 Additions — 1,066 — Accretion (236 ) (308 ) (629 ) Payoffs (1,850 ) (2,164 ) — Reclassification from (to) nonaccretable difference 776 1,277 483 Balance at the end of period $ 1,709 $ 3,019 $ 3,601

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2018
Provision for Loan and Lease Losses [Abstract]
Summary of allocation of the allowance as well as the activity in the allowance attributed to various segments in the loan portfolio	The following tables summarize the allocation of the ALLL, as well as the activity in the ALLL attributed to various segments in the loan portfolio as of and for the three months ended for the periods indicated: Three Months Ended March 31, 2018 Commercial and industrial Franchise Commercial owner occupied SBA Agribusiness Commercial non-owner occupied Multi-family One-to-four family Construction Farmland Land Consumer loans Total (dollars in thousands) Balance, December 31, 2017 $ 9,721 $ 5,797 $ 767 $ 2,890 $ 1,291 $ 1,266 $ 607 $ 803 $ 4,569 $ 137 $ 993 $ 95 $ 28,936 Charge-offs (665 ) — — (29 ) — — — — — — — (52 ) (746 ) Recoveries 25 — 8 26 — — — — — — — — 59 Provisions for (reduction in) loan losses 411 298 16 (73 ) 814 71 (15 ) (58 ) 506 97 179 7 2,253 Balance, March 31, 2018 $ 9,492 $ 6,095 $ 791 $ 2,814 $ 2,105 $ 1,337 $ 592 $ 745 $ 5,075 $ 234 $ 1,172 $ 50 $ 30,502 Amount of allowance attributed to: Specifically evaluated impaired loans $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — General portfolio allocation 9,492 6,095 791 2,814 2,105 1,337 592 745 5,075 234 1,172 50 30,502 Loans individually evaluated for impairment 1,067 — 3,475 1,218 — — 1,231 1,134 — — 8 16 8,149 Specific reserves to total loans individually evaluated for impairment — % — % — % — % — % — % — % — % — % — % — % — % — % Loans collectively evaluated for impairment $ 1,061,318 $ 692,846 $ 1,265,394 $ 181,408 $ 149,256 $ 1,227,693 $ 816,732 $ 265,190 $ 319,610 $ 136,522 $ 34,444 $ 86,190 $ 6,236,603 General reserves to total loans collectively evaluated for impairment 0.89 % 0.88 % 0.06 % 1.55 % 1.41 % 0.11 % 0.07 % 0.28 % 1.59 % 0.17 % 3.40 % 0.06 % 0.49 % Total gross loans held for investment $ 1,062,385 $ 692,846 $ 1,268,869 $ 182,626 $ 149,256 $ 1,227,693 $ 817,963 $ 266,324 $ 319,610 $ 136,522 $ 34,452 $ 86,206 $ 6,244,752 Total allowance to gross loans held for investment 0.89 % 0.88 % 0.06 % 1.54 % 1.41 % 0.11 % 0.07 % 0.28 % 1.59 % 0.17 % 3.40 % 0.06 % 0.49 % Three Months Ended March 31, 2017 Commercial and industrial Franchise Commercial owner occupied SBA Multi-family One-to-four family Construction Land Consumer loans Total (dollars in thousands) Balance, December 31, 2016 $ 6,362 $ 3,845 $ 1,193 $ 1,039 $ 2,927 $ 365 $ 3,632 $ 198 $ 20 $ 21,296 Charge-offs (752 ) — — (8 ) — — — — — (760 ) Recoveries 22 — 12 2 — 1 — — — 37 Provisions for (reduction in) loan losses 1,317 629 27 112 (124 ) 7 395 6 1 2,502 Balance, March 31, 2017 $ 6,949 $ 4,474 $ 1,232 $ 1,145 $ 2,803 $ 373 $ 4,027 $ 204 $ 21 $ 23,075 Amount of allowance attributed to: Specifically evaluated impaired loans $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — General portfolio allocation 6,949 4,474 1,232 1,145 2,803 373 4,027 204 21 23,075 Loans individually evaluated for impairment — — 86 298 — 115 — 14 — 513 Specific reserves to total loans individually evaluated for impairment — % — % — % — % — % — % — % — % — % — % Loans collectively evaluated for impairment $ 593,457 $ 493,158 $ 482,209 $ 96,188 $ 682,237 $ 100,308 $ 298,279 $ 19,724 $ 3,930 $ 3,381,934 General reserves to total loans collectively evaluated for impairment 1.17 % 0.91 % 0.26 % 1.19 % 0.41 % 0.37 % 1.35 % 1.03 % 0.53 % 0.68 % Total gross loans held for investment $ 593,457 $ 493,158 $ 482,295 $ 96,486 $ 682,237 $ 100,423 $ 298,279 $ 19,738 $ 3,930 $ 3,382,447 Total allowance to gross loans held for investment 1.17 % 0.91 % 0.26 % 1.19 % 0.41 % 0.37 % 1.35 % 1.03 % 0.53 % 0.68 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of number of stock options excluded from the computations of diluted earnings per share	The following table sets forth the weighted average number of stock options excluded for the periods indicated: Three Months Ended March 31, December 31, March 31, 2018 2017 2017 Weighted average stock options excluded — 1,228 —
Schedule of Company's unaudited earnings per share calculations	The following tables set forth the Company’s earnings per share calculations for the periods indicated: Three Months Ended March 31, 2018 December 31, 2017 March 31, 2017 Net Shares Per Share Net Shares Per Share Net Shares Per Share (dollars in thousands, except per share data) Net income $ 28,002 $ 16,171 $ 9,521 Basic income available to common stockholders 28,002 45,893,496 $ 0.61 16,171 43,797,403 $ 0.37 9,521 27,528,940 $ 0.35 Dilutive effect of share-based compensation — 758,563 — 816,945 — 668,280 Diluted income available to common stockholders plus assumed conversions $ 28,002 46,652,059 $ 0.60 $ 16,171 44,614,348 $ 0.36 $ 9,521 28,197,220 $ 0.34

Fair Value of Financial Instr28

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of carrying amount and estimated fair value of financial instruments	The fair value estimates presented herein are based on pertinent information available to management as of the periods indicated, representing an exit price. At March 31, 2018 Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value (dollars in thousands) Assets: Cash and cash equivalents $ 128,996 $ 128,996 $ — $ — $ 128,996 Interest-bearing time deposits with financial institutions 3,693 3,693 — — 3,693 Investments held-to-maturity 24,559 — 23,915 — 23,915 Investment securities available-for-sale 863,243 — 863,243 — 863,243 FHLB, FRB and other stock 82,115 N/A N/A N/A N/A Loans held for sale 29,034 — 31,255 — 31,255 Loans held for investment, net 6,241,841 — — 6,254,567 6,254,567 Derivative asset 2,717 — 2,717 — 2,717 Accrued interest receivable 27,073 27,073 — — 27,073 Liabilities: Deposit accounts 6,192,273 5,074,330 1,109,351 — 6,183,681 FHLB advances 439,647 — 438,664 — 438,664 Other borrowings 43,876 — 43,991 — 43,991 Subordinated debentures 105,188 — 115,544 — 115,544 Derivative liability 2,717 — 2,717 — 2,717 Accrued interest payable 1,638 1,638 — — 1,638 At December 31, 2017 Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value (dollars in thousands) Assets: Cash and cash equivalents $ 200,064 $ 200,064 $ — $ — $ 200,064 Interest-bearing time deposits with financial institutions 3,693 3,693 — — 3,693 Investments held-to-maturity 18,291 — 18,082 — 18,082 Investment securities available-for-sale 787,429 — 787,429 — 787,429 FHLB, FRB and other stock 65,881 N/A N/A N/A N/A Loans held for sale 23,426 — 23,524 — 23,524 Loans held for investment, net (1) 6,167,532 — — 6,269,366 6,269,366 Derivative asset 1,135 — 1,135 — $ 1,135 Accrued interest receivable 27,053 27,053 — — 27,053 Liabilities: Deposit accounts 6,085,868 5,001,053 1,074,564 — 6,075,617 FHLB advances 490,148 — 489,823 — 489,823 Other borrowings 46,139 — 46,373 — 46,373 Subordinated debentures 105,123 — 115,159 — 115,159 Derivative liability 1,135 — 1,135 — 1,135 Accrued interest payable 2,131 2,131 — — 2,131 (1) The estimated fair value of loans held for investment, net for December 31, 2017 is not based on an exit price assumption.
Schedule of Company's financial instruments measured at fair value on a recurring basis	The following fair value hierarchy table presents information about the Company’s financial instruments measured at fair value on a recurring basis at the dates indicated: March 31, 2018 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ — $ 44,164 $ — $ 44,164 Corporate — 104,406 — 104,406 Municipal bonds — 223,657 — 223,657 Collateralized mortgage obligation — 31,709 — 31,709 Mortgage-backed securities — 459,307 — 459,307 Total securities available-for-sale $ — $ 863,243 $ — $ 863,243 December 31, 2017 Fair Value Measurement Using Level 1 Level 2 Level 3 Securities at Fair Value (dollars in thousands) Investment securities available-for-sale: Agency $ — $ 47,209 $ — $ 47,209 Corporate — 79,546 — 79,546 Municipal bonds — 232,128 — 232,128 Collateralized mortgage obligation — 33,781 — 33,781 Mortgage-backed securities — 394,765 — 394,765 Total securities available-for-sale $ — $ 787,429 $ — $ 787,429

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following tables summarize the Company's derivative instruments, included in "other assets" and "other liabilities" in the consolidated statements of financial condition: March 31, 2018 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 58,150 $ 2,717 $ 58,150 $ 2,717 Total derivative instruments $ 58,150 $ 2,717 $ 58,150 $ 2,717 December 31, 2017 Derivative Assets Derivative Liabilities Notional Fair Value Notional Fair Value (dollars in thousands) Derivative instruments not designated as hedging instruments: Interest rate swap contracts $ 58,599 $ 1,135 $ 58,599 $ 1,135 Total derivative instruments $ 58,599 $ 1,135 $ 58,599 $ 1,135

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2018
Offsetting [Abstract]
Offsetting Assets and Liabilities	Financial instruments that are eligible for offset in the consolidated statements of financial condition as of March 31, 2018 are presented in the table below: Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (dollars in thousands) March 31, 2018 Financial assets: Derivatives not designated as $ 2,717 $ — $ 2,717 — $ — $ 2,717 Total $ 2,717 $ — $ 2,717 — $ — $ 2,717 Financial liabilities: Derivatives not designated as $ 2,717 — $ 2,717 — — $ 2,717 Total $ 2,717 — $ 2,717 — — $ 2,717 (1) Represents cash collateral held with counterparty bank. Financial instruments that are eligible for offset in the consolidated statements of financial condition as of December 31, 2017 are presented in the table below: Gross Amounts Not Offset in the Consolidated Gross Amounts Recognized in the Consolidated Balance Sheets Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts Presented in the Consolidated Balance Sheets Financial Instruments Cash Collateral (1) Net Amount (dollars in thousands) December 31, 2017 Financial assets: Derivatives not designated as $ 1,833 $ (698 ) $ 1,135 — $ — $ 1,135 Total $ 1,833 $ (698 ) $ 1,135 — $ — $ 1,135 Financial liabilities: Derivatives not designated as $ 1,135 — $ 1,135 — — $ 1,135 Total $ 1,135 — $ 1,135 — — $ 1,135 (1) Represents cash collateral held with counterparty bank.

Recently Issued Accounting Pr31

Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain tax effects of the Tax Cuts and Jobs Act		$ 0
Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain tax effects of the Tax Cuts and Jobs Act		82
Accumulated Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain tax effects of the Tax Cuts and Jobs Act		(82)
Accounting Standards Update 2018-02 | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain tax effects of the Tax Cuts and Jobs Act		82
Accounting Standards Update 2018-02 | Accumulated Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain tax effects of the Tax Cuts and Jobs Act		$ (82)
Scenario, Forecast [Member] | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Expected assets and liabilities recognized under new lease standard, as a percentage of total assets	1.00%

Significant Accounting Polici32

Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loan servicing fees	$ 345
Loan servicing fees, percent of total revenue	0.40%
Earnings on bank-owned life insurance	$ 611	$ 625	$ 336
Earnings on bank-owned life insurance, percent of total revenue	0.70%
Net gain from sales of loans	$ 3,000
Net gain from sales of loans, percent of total revenue	3.30%
Other income, accounted for under other applicable GAAP	$ 1,100
Other income, accounted for under other applicable GAAP, percent of total revenue	1.30%
Core Deposits | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Weighted average useful life (in years)	6 years
Core Deposits | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Weighted average useful life (in years)	10 years
Deposit accounts
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 1,300
Percentage of revenue	1.50%
Debit card
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 1,000
Percentage of revenue	1.20%
Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 300
Percentage of revenue	0.30%

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ / shares in Units, $ in Thousands	Nov. 01, 2017USD ($)$ / sharesshares	Apr. 01, 2017USD ($)shares	Sep. 30, 2017USD ($)	Mar. 31, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Mar. 31, 2017$ / shares
Business Acquisition [Line Items]
Company's common stock value (usd per share) | $ / shares							$ 38.55
Goodwill				$ 493,785	$ 493,785	$ 493,329
Adjustment to deferred tax assets and the deal consideration			$ 1,100
Plaza Bancorp
Business Acquisition [Line Items]
Total assets acquired	$ 1,245,740			1,256,290	1,256,290
Gross loans acquired	1,100,000
Total deposits acquired	$ 1,081,727			1,082,951	1,082,951
Equity issued, ratio	0.2000
Consideration paid	$ 246,000			245,761
Aggregate cash consideration payable	$ 6,500
Common stock issued as consideration (in shares) | shares	6,049,373
Company's common stock value (usd per share) | $ / shares	$ 40.40
Goodwill	$ 122,000			121,908	121,908
Heritage Oaks Bancorp
Business Acquisition [Line Items]
Total assets acquired		$ 2,005,637		2,015,822	2,015,822
Gross loans acquired		1,400,000
Total deposits acquired		$ 1,668,079		1,669,550	1,669,550
Equity issued, ratio		0.3471
Consideration paid		$ 468,000			468,131
Aggregate cash consideration payable		3,900
Goodwill		$ 269,000		$ 268,954	$ 268,954
Heritage Oaks Bancorp | Common Stock
Business Acquisition [Line Items]
Common stock issued as consideration (in shares) | shares		11,959,022

Acquisitions - Assets Acquired

Acquisitions - Assets Acquired and Liabilities Assumed - Schedule (Details) - USD ($) $ in Thousands	Nov. 01, 2017	Apr. 01, 2017	Mar. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
LIABILITIES ASSUMED
Goodwill recognized			$ 493,785	$ 493,785	$ 493,329
Plaza Bancorp
ASSETS ACQUIRED
Cash and cash equivalents	$ 150,459		150,459	150,459
Loans, gross	1,069,359		1,062,901	1,062,901
Allowance for loan losses	(13,009)		0	0
Fixed assets	7,389		7,195	7,195
Core deposit intangible	198		11,580	11,580
Deferred tax assets	11,849		4,990	4,990
Other assets	19,495		19,165	19,165
Total assets acquired	1,245,740		1,256,290	1,256,290
LIABILITIES ASSUMED
Deposits	1,081,727		1,082,951	1,082,951
Borrowings	40,755		41,152	41,152
Other Liabilities	8,956		8,334	8,334
Total liabilities assumed	1,131,438		1,132,437	1,132,437
Excess of assets acquired over liabilities assumed	114,302		123,853	123,853
Consideration paid	246,000		245,761
Goodwill recognized	$ 122,000		121,908	121,908
Fair Value Adjustments
Cash and cash equivalents			0
Loans, gross			(6,458)
Allowance for loan losses			13,009
Fixed assets			(194)
Core deposit intangible			11,382
Deferred tax assets			(6,859)
Other assets			(330)
Total assets acquired			10,550
Deposits			1,224
Borrowings			397
Other Liabilities			(622)
Total liabilities assumed			999
Excess of assets acquired over liabilities assumed			9,551
Heritage Oaks Bancorp
ASSETS ACQUIRED
Cash and cash equivalents		$ 78,728	78,728	78,728
Investment securities		447,520	442,923	442,923
Loans, gross		1,387,949	1,364,649	1,364,649
Allowance for loan losses		(17,200)	0	0
Fixed assets		35,567	34,902	34,902
Core deposit intangible		0	28,123	28,123
Deferred tax assets		17,850	11,283	11,283
Other assets		55,223	55,214	55,214
Total assets acquired		2,005,637	2,015,822	2,015,822
LIABILITIES ASSUMED
Deposits		1,668,079	1,669,550	1,669,550
Borrowings		141,996	139,034	139,034
Other Liabilities		7,290	8,061	8,061
Total liabilities assumed		1,817,365	1,816,645	1,816,645
Excess of assets acquired over liabilities assumed		188,272	199,177	199,177
Consideration paid		468,000		468,131
Goodwill recognized		$ 269,000	$ 268,954	268,954
Fair Value Adjustments
Cash and cash equivalents				0
Investment securities				(4,597)
Loans, gross				(23,300)
Allowance for loan losses				17,200
Fixed assets				(665)
Core deposit intangible				28,123
Deferred tax assets				(6,567)
Other assets				(9)
Total assets acquired				10,185
Deposits				1,471
Borrowings				(2,962)
Other Liabilities				771
Total liabilities assumed				(720)
Excess of assets acquired over liabilities assumed				$ 10,905

Acquisitions - Loan Information

Acquisitions - Loan Information (Details) - Acquired Loans - USD ($) $ in Thousands	Nov. 01, 2017	Apr. 01, 2017
Plaza Bancorp
Business Acquisition [Line Items]
Contractual amounts due	$ 1,708,685
Cash flows not expected to be collected	20,152
Expected cash flows	1,688,533
Interest component of expected cash flows	625,592
Fair value of acquired loans	$ 1,062,941
Heritage Oaks Bancorp
Business Acquisition [Line Items]
Contractual amounts due		$ 1,717,191
Cash flows not expected to be collected		4,442
Expected cash flows		1,712,749
Interest component of expected cash flows		348,100
Fair value of acquired loans		$ 1,364,649

Acquisitions - Pro Forma Inform

Acquisitions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Business Combinations [Abstract]
Net interest and other income	$ 86,694	$ 90,469	$ 77,840
Net income	$ 28,002	$ 12,189	$ 13,771
Basic earnings per share (in dollars per share)	$ 0.61	$ 0.27	$ 0.30
Diluted earnings per share (in dollars per share)	$ 0.60	$ 0.26	$ 0.30

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available for sale:
Total	$ 875,805	$ 786,783
Unrealized Gain	2,874	6,161
Unrealized Loss	(15,436)	(5,515)
Investment securities available-for-sale, at fair value	863,243	787,429
Held to maturity:
Amortized Cost	24,559	18,291
Unrealized Gain	0	0
Unrealized Loss	(644)	(209)
Estimated Fair Value	23,915	18,082
Total investment securities
Amortized Cost	900,364	805,074
Unrealized Gain	2,874	6,161
Unrealized Loss	(16,080)	(5,724)
Estimated Fair Value	887,158	805,511
Agency
Available for sale:
Total	44,208	47,051
Unrealized Gain	60	236
Unrealized Loss	(104)	(78)
Investment securities available-for-sale, at fair value	44,164	47,209
Corporate
Available for sale:
Total	103,671	78,155
Unrealized Gain	1,084	1,585
Unrealized Loss	(349)	(194)
Investment securities available-for-sale, at fair value	104,406	79,546
Municipal bonds
Available for sale:
Total	225,201	228,929
Unrealized Gain	1,522	3,942
Unrealized Loss	(3,066)	(743)
Investment securities available-for-sale, at fair value	223,657	232,128
Collateralized mortgage obligation: residential
Available for sale:
Total	32,223	33,984
Unrealized Gain	97	132
Unrealized Loss	(611)	(335)
Investment securities available-for-sale, at fair value	31,709	33,781
Mortgage-backed securities: residential
Available for sale:
Total	470,502	398,664
Unrealized Gain	111	266
Unrealized Loss	(11,306)	(4,165)
Investment securities available-for-sale, at fair value	459,307	394,765
Held to maturity:
Amortized Cost	23,434	17,153
Unrealized Gain	0	0
Unrealized Loss	(644)	(209)
Estimated Fair Value	22,790	16,944
Other
Held to maturity:
Amortized Cost	1,125	1,138
Unrealized Gain	0	0
Unrealized Loss	0	0
Estimated Fair Value	$ 1,125	$ 1,138

Investment Securities - Narrati

Investment Securities - Narrative (Details)	3 Months Ended			12 Months Ended
	Mar. 31, 2018USD ($)purchase_agreement	Dec. 31, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)purchase_agreement
Investment Securities
Accumulated other comprehensive income (loss) before tax amount	$ 12,600,000	$ (646,000)		$ (646,000)
Accumulated other comprehensive income, net of tax	$ 8,851,000	(415,000)		$ (415,000)
Number of inverse putable reverse repurchase of the Bank's secured by collateral | purchase_agreement	2			3
Value of inverse putable reverse repurchases secured by collateral	$ 18,500,000	28,500,000		$ 28,500,000
Other-than-temporary-impairment recovery/(loss) on securities	0	0
Book value	863,243,000	787,429,000		787,429,000
Gross gains	6,000	0	$ 0
Gross losses	0	(252,000)	0
Proceeds from sale or maturity of securities available for sale		14,000,000
FHLB stock	17,300,000
FRB stock	33,200,000
Other stock	31,700,000
Amount of stock repurchased by FHLB	0		$ 0
HOA
Investment Securities
Value of inverse putable reverse repurchases secured by collateral	25,400,000	17,600,000		17,600,000
Mortgage-backed securities: residential
Investment Securities
Estimated par value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	59,700,000	55,600,000		55,600,000
Fair value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	$ 60,100,000	$ 57,000,000		$ 57,000,000

Investment Securities - Investm

Investment Securities - Investment Category and Length of Time (Details) $ in Thousands	Mar. 31, 2018USD ($)investment_security	Dec. 31, 2017USD ($)investment_security
Less than 12 months
Number | investment_security	446	184
Fair Value	$ 727,754	$ 320,068
Gross Unrealized Holding Losses	$ (9,478)	$ (2,159)
12 months or Longer
Number | investment_security	80	76
Fair Value	$ 135,489	$ 140,739
Gross Unrealized Holding Losses	$ (5,958)	$ (3,356)
Total
Number | investment_security	526	260
Fair Value	$ 863,243	$ 460,807
Gross Unrealized Holding Losses	$ (15,436)	$ (5,515)
Held-to-maturity, less than 12 months, number of securities | investment_security	4	2
Held-to-maturity, less than 12 months, fair value	$ 16,773	$ 10,745
Held-to-maturity, less than 12 months, gross unrealized holding losses	$ (421)	$ (133)
Held-to-maturity, 12 months or longer, number of securities | investment_security	1	1
Held-to-maturity, 12 months or longer, fair value	$ 6,017	$ 6,198
Held-to-maturity, 12 months or longer, gross unrealized holding losses	$ (223)	$ (76)
Held-to-maturity, number of securities | investment_security	5	3
Held-to-maturity securities, fair value	$ 22,790	$ 16,943
Unrealized Loss	$ (644)	$ (209)
Total securities, less than 12 months, number of securities | investment_security	450	186
Total securities, less than 12 months, fair value	$ 744,527	$ 330,813
Total securities, less than 12 months, gross unrealized holding losses	$ (9,899)	$ (2,292)
Total securities, 12 months or longer, number of securities | investment_security	81	77
Total securities, 12 months or longer, fair value	$ 141,506	$ 146,937
Total securities, 12 months or longer, gross unrealized holding losses	$ (6,181)	$ (3,432)
Total securities, number of securities | investment_security	531	263
Total securities, fair value	$ 886,033	$ 477,750
Total securities, gross unrealized holding losses	$ (16,080)	$ (5,724)
Agency
Less than 12 months
Number | investment_security	19	6
Fair Value	$ 42,806	$ 13,754
Gross Unrealized Holding Losses	$ (82)	$ (78)
12 months or Longer
Number | investment_security	1	0
Fair Value	$ 1,358	$ 0
Gross Unrealized Holding Losses	$ (22)	$ 0
Total
Number | investment_security	20	6
Fair Value	$ 44,164	$ 13,754
Gross Unrealized Holding Losses	$ (104)	$ (78)
Corporate
Less than 12 months
Number | investment_security	22	4
Fair Value	$ 98,346	$ 10,079
Gross Unrealized Holding Losses	$ (210)	$ (64)
12 months or Longer
Number | investment_security	2	2
Fair Value	$ 6,060	$ 6,076
Gross Unrealized Holding Losses	$ (139)	$ (130)
Total
Number | investment_security	24	6
Fair Value	$ 104,406	$ 16,155
Gross Unrealized Holding Losses	$ (349)	$ (194)
Municipal bonds
Less than 12 months
Number | investment_security	289	103
Fair Value	$ 207,591	$ 61,313
Gross Unrealized Holding Losses	$ (1,960)	$ (268)
12 months or Longer
Number | investment_security	32	30
Fair Value	$ 16,066	$ 15,658
Gross Unrealized Holding Losses	$ (1,106)	$ (475)
Total
Number | investment_security	321	133
Fair Value	$ 223,657	$ 76,971
Gross Unrealized Holding Losses	$ (3,066)	$ (743)
Collateralized mortgage obligation: residential
Less than 12 months
Number | investment_security	11	5
Fair Value	$ 23,452	$ 13,971
Gross Unrealized Holding Losses	$ (351)	$ (149)
12 months or Longer
Number | investment_security	3	3
Fair Value	$ 8,257	$ 8,943
Gross Unrealized Holding Losses	$ (260)	$ (186)
Total
Number | investment_security	14	8
Fair Value	$ 31,709	$ 22,914
Gross Unrealized Holding Losses	$ (611)	$ (335)
Mortgage-backed securities: residential
Less than 12 months
Number | investment_security	105	66
Fair Value	$ 355,559	$ 220,951
Gross Unrealized Holding Losses	$ (6,875)	$ (1,600)
12 months or Longer
Number | investment_security	42	41
Fair Value	$ 103,748	$ 110,062
Gross Unrealized Holding Losses	$ (4,431)	$ (2,565)
Total
Number | investment_security	147	107
Fair Value	$ 459,307	$ 331,013
Gross Unrealized Holding Losses	$ (11,306)	$ (4,165)
Held-to-maturity, less than 12 months, number of securities | investment_security	4	2
Held-to-maturity, less than 12 months, fair value	$ 16,773	$ 10,745
Held-to-maturity, less than 12 months, gross unrealized holding losses	$ (421)	$ (133)
Held-to-maturity, 12 months or longer, number of securities | investment_security	1	1
Held-to-maturity, 12 months or longer, fair value	$ 6,017	$ 6,198
Held-to-maturity, 12 months or longer, gross unrealized holding losses	$ (223)	$ (76)
Held-to-maturity, number of securities | investment_security	5	3
Held-to-maturity securities, fair value	$ 22,790	$ 16,943
Unrealized Loss	$ (644)	$ (209)

Investment Securities - By Cont

Investment Securities - By Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Amortized Cost
One Year or Less	$ 7,035
More than One Year to Five Years	33,603
More than Five Years to Ten Years	279,078
More than Ten Years	556,089
Total	875,805	$ 786,783
Fair Value
One Year or Less	7,028
More than One Year to Five Years	33,477
More than Five Years to Ten Years	276,674
More than Ten Years	546,064
Total	863,243	787,429
Amortized Cost
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	0
More than Ten Years	24,559
Amortized Cost	24,559	18,291
Fair Value
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	0
More than Ten Years	23,915
Total	23,915	18,082
Amortized Cost
One Year or Less	7,035
More than One Year to Five Years	33,603
More than Five Years to Ten Years	279,078
More than Ten Years	580,648
Total	900,364
Fair Value
One Year or Less	7,028
More than One Year to Five Years	33,477
More than Five Years to Ten Years	276,674
More than Ten Years	569,979
Total	887,158
Agency
Amortized Cost
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	19,761
More than Ten Years	24,447
Total	44,208	47,051
Fair Value
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	19,726
More than Ten Years	24,438
Total	44,164	47,209
Corporate
Amortized Cost
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	91,671
More than Ten Years	12,000
Total	103,671	78,155
Fair Value
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	92,330
More than Ten Years	12,076
Total	104,406	79,546
Municipal bonds
Amortized Cost
One Year or Less	4,463
More than One Year to Five Years	31,257
More than Five Years to Ten Years	73,327
More than Ten Years	116,154
Total	225,201	228,929
Fair Value
One Year or Less	4,463
More than One Year to Five Years	31,194
More than Five Years to Ten Years	72,004
More than Ten Years	115,996
Total	223,657	232,128
Collateralized mortgage obligation: residential
Amortized Cost
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	1,007
More than Ten Years	31,216
Total	32,223	33,984
Fair Value
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	1,009
More than Ten Years	30,700
Total	31,709	33,781
Mortgage-backed securities: residential
Amortized Cost
One Year or Less	2,572
More than One Year to Five Years	2,346
More than Five Years to Ten Years	93,312
More than Ten Years	372,272
Total	470,502	398,664
Fair Value
One Year or Less	2,565
More than One Year to Five Years	2,283
More than Five Years to Ten Years	91,605
More than Ten Years	362,854
Total	459,307	394,765
Amortized Cost
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	0
More than Ten Years	23,434
Amortized Cost	23,434	17,153
Fair Value
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	0
More than Ten Years	22,790
Total	22,790	$ 16,944
Other
Amortized Cost
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	0
More than Ten Years	1,125
Amortized Cost	1,125
Fair Value
One Year or Less	0
More than One Year to Five Years	0
More than Five Years to Ten Years	0
More than Ten Years	1,125
Total	$ 1,125

Loans Held for Investment - Com

Loans Held for Investment - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Loans Held for Investment
Gross loans held for investment	$ 6,244,752	$ 6,198,627
Deferred loan origination costs/(fees) and premiums/(discounts), net	(2,911)	(2,159)
Loans held for investment	6,241,841	6,196,468
Allowance for loan losses	(30,502)	(28,936)	$ (23,075)	$ (21,296)
Loans held for investment, net	6,211,339	6,167,532
Loans held for sale, at lower of cost or fair value	29,034	23,426
Unaccreted mark-to-market discount	(24,500)	(29,100)
Business loans
Loans Held for Investment
Gross loans held for investment	3,355,982	3,337,866
Business loans | Commercial and industrial
Loans Held for Investment
Gross loans held for investment	1,062,385	1,086,659
Allowance for loan losses	(9,492)	(9,721)	(6,949)	(6,362)
Business loans | Franchise
Loans Held for Investment
Gross loans held for investment	692,846	660,414
Allowance for loan losses	(6,095)	(5,797)	(4,474)	(3,845)
Business loans | Commercial owner occupied
Loans Held for Investment
Gross loans held for investment	1,268,869	1,289,213
Allowance for loan losses	(791)	(767)	(1,232)	(1,193)
Business loans | SBA
Loans Held for Investment
Gross loans held for investment	182,626	185,514
Allowance for loan losses	(2,814)	(2,890)	(1,145)	(1,039)
Business loans | Agribusiness
Loans Held for Investment
Gross loans held for investment	149,256	116,066
Allowance for loan losses	(2,105)	(1,291)
Real estate loans
Loans Held for Investment
Gross loans held for investment	2,802,564	2,767,830
Real estate loans | Commercial non-owner occupied
Loans Held for Investment
Gross loans held for investment	1,227,693	1,243,115
Allowance for loan losses	(1,337)	(1,266)
Real estate loans | Multi-family
Loans Held for Investment
Gross loans held for investment	817,963	794,384
Allowance for loan losses	(592)	(607)	(2,803)	(2,927)
Real estate loans | One-to-four family
Loans Held for Investment
Gross loans held for investment	266,324	270,894
Allowance for loan losses	(745)	(803)	(373)	(365)
Real estate loans | Construction
Loans Held for Investment
Gross loans held for investment	319,610	282,811
Allowance for loan losses	(5,075)	(4,569)	(4,027)	(3,632)
Real estate loans | Farmland
Loans Held for Investment
Gross loans held for investment	136,522	145,393
Allowance for loan losses	(234)	(137)
Real estate loans | Land
Loans Held for Investment
Gross loans held for investment	34,452	31,233
Allowance for loan losses	(1,172)	(993)	(204)	(198)
Consumer Loans | Consumer loans
Loans Held for Investment
Gross loans held for investment	86,206	92,931
Allowance for loan losses	$ (50)	$ (95)	$ (21)	$ (20)

Loans Held for Investment - Nar

Loans Held for Investment - Narrative (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)areagrade	Dec. 31, 2017USD ($)
Receivables [Abstract]
Servicing rights retained from guaranteed portion of SBA loans sold	$ 8,800,000	$ 8,800,000
Unpaid principal balance for loans and participations serviced for others	621,000,000	635,000,000
Secured loans limit to one borrower	345,000,000
Unsecured loans limit to one borrower	207,000,000
Aggregate outstanding balance of loans to one borrower of secured credit	$ 45,000,000
Number of areas where the entity's credit quality is maintained and credit risk managed | area	2
Number of Pass scale grades | grade	6
Nonaccruing loans	$ 8,149,000	3,284,000
Loans 90 days or more past due and still accruing	73,000	1,800,000
Investment in TDR	0	97,000
Consumer mortgage loans collateralized by residential real estate, foreclosure proceedings in process	14,000	$ 73,000
Outstanding balance	6,100,000
Purchased credit impaired loans, nonaccrual status	$ 0

Loans Held for Investment - Int

Loans Held for Investment - Internal Risk Grading System (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Credit Risk Grades
Gross loans	$ 6,273,775	$ 6,222,053
Pass
Credit Risk Grades
Gross loans	6,208,457	6,160,136
Special Mention
Credit Risk Grades
Gross loans	14,064	13,612
Substandard
Credit Risk Grades
Gross loans	51,254	48,305
Doubtful
Credit Risk Grades
Gross loans	0	0
Business loans | Commercial and industrial
Credit Risk Grades
Gross loans	1,062,385	1,086,659
Business loans | Franchise
Credit Risk Grades
Gross loans	692,846	660,414
Business loans | Commercial owner occupied
Credit Risk Grades
Gross loans	1,284,528	1,295,215
Business loans | SBA
Credit Risk Grades
Gross loans	195,990	202,938
Business loans | Agribusiness
Credit Risk Grades
Gross loans	149,256	116,066
Business loans | Pass | Commercial and industrial
Credit Risk Grades
Gross loans	1,041,457	1,063,452
Business loans | Pass | Franchise
Credit Risk Grades
Gross loans	692,846	660,414
Business loans | Pass | Commercial owner occupied
Credit Risk Grades
Gross loans	1,262,138	1,273,381
Business loans | Pass | SBA
Credit Risk Grades
Gross loans	193,527	199,468
Business loans | Pass | Agribusiness
Credit Risk Grades
Gross loans	136,139	108,143
Business loans | Special Mention | Commercial and industrial
Credit Risk Grades
Gross loans	8,172	8,163
Business loans | Special Mention | Franchise
Credit Risk Grades
Gross loans	0	0
Business loans | Special Mention | Commercial owner occupied
Credit Risk Grades
Gross loans	4,170	654
Business loans | Special Mention | SBA
Credit Risk Grades
Gross loans	890	1
Business loans | Special Mention | Agribusiness
Credit Risk Grades
Gross loans	0	4,079
Business loans | Substandard | Commercial and industrial
Credit Risk Grades
Gross loans	12,756	15,044
Business loans | Substandard | Franchise
Credit Risk Grades
Gross loans	0	0
Business loans | Substandard | Commercial owner occupied
Credit Risk Grades
Gross loans	18,220	21,180
Business loans | Substandard | SBA
Credit Risk Grades
Gross loans	1,573	3,469
Business loans | Substandard | Agribusiness
Credit Risk Grades
Gross loans	13,117	3,844
Business loans | Doubtful | Commercial and industrial
Credit Risk Grades
Gross loans	0	0
Business loans | Doubtful | Franchise
Credit Risk Grades
Gross loans	0	0
Business loans | Doubtful | Commercial owner occupied
Credit Risk Grades
Gross loans	0	0
Business loans | Doubtful | SBA
Credit Risk Grades
Gross loans	0	0
Business loans | Doubtful | Agribusiness
Credit Risk Grades
Gross loans	0	0
Real estate loans | Commercial non-owner occupied
Credit Risk Grades
Gross loans	1,227,693	1,243,115
Real estate loans | Multi-family
Credit Risk Grades
Gross loans	817,963	794,384
Real estate loans | One-to-four family
Credit Risk Grades
Gross loans	266,324	270,894
Real estate loans | Construction
Credit Risk Grades
Gross loans	319,610	282,811
Real estate loans | Farmland
Credit Risk Grades
Gross loans	136,522	145,393
Real estate loans | Land
Credit Risk Grades
Gross loans	34,452	31,233
Real estate loans | Pass | Commercial non-owner occupied
Credit Risk Grades
Gross loans	1,226,642	1,242,045
Real estate loans | Pass | Multi-family
Credit Risk Grades
Gross loans	816,506	794,156
Real estate loans | Pass | One-to-four family
Credit Risk Grades
Gross loans	264,574	268,776
Real estate loans | Pass | Construction
Credit Risk Grades
Gross loans	318,923	282,294
Real estate loans | Pass | Farmland
Credit Risk Grades
Gross loans	135,413	144,234
Real estate loans | Pass | Land
Credit Risk Grades
Gross loans	34,221	30,979
Real estate loans | Special Mention | Commercial non-owner occupied
Credit Risk Grades
Gross loans	0	0
Real estate loans | Special Mention | Multi-family
Credit Risk Grades
Gross loans	0	0
Real estate loans | Special Mention | One-to-four family
Credit Risk Grades
Gross loans	145	154
Real estate loans | Special Mention | Construction
Credit Risk Grades
Gross loans	687	517
Real estate loans | Special Mention | Farmland
Credit Risk Grades
Gross loans	0	44
Real estate loans | Special Mention | Land
Credit Risk Grades
Gross loans	0	0
Real estate loans | Substandard | Commercial non-owner occupied
Credit Risk Grades
Gross loans	1,051	1,070
Real estate loans | Substandard | Multi-family
Credit Risk Grades
Gross loans	1,457	228
Real estate loans | Substandard | One-to-four family
Credit Risk Grades
Gross loans	1,605	1,964
Real estate loans | Substandard | Construction
Credit Risk Grades
Gross loans	0	0
Real estate loans | Substandard | Farmland
Credit Risk Grades
Gross loans	1,109	1,115
Real estate loans | Substandard | Land
Credit Risk Grades
Gross loans	231	254
Real estate loans | Doubtful | Commercial non-owner occupied
Credit Risk Grades
Gross loans	0	0
Real estate loans | Doubtful | Multi-family
Credit Risk Grades
Gross loans	0	0
Real estate loans | Doubtful | One-to-four family
Credit Risk Grades
Gross loans	0	0
Real estate loans | Doubtful | Construction
Credit Risk Grades
Gross loans	0	0
Real estate loans | Doubtful | Farmland
Credit Risk Grades
Gross loans	0	0
Real estate loans | Doubtful | Land
Credit Risk Grades
Gross loans	0	0
Consumer Loans | Consumer loans
Credit Risk Grades
Gross loans	86,206	92,931
Consumer Loans | Pass | Consumer loans
Credit Risk Grades
Gross loans	86,071	92,794
Consumer Loans | Special Mention | Consumer loans
Credit Risk Grades
Gross loans	0	0
Consumer Loans | Substandard | Consumer loans
Credit Risk Grades
Gross loans	135	137
Consumer Loans | Doubtful | Consumer loans
Credit Risk Grades
Gross loans	$ 0	$ 0

Loans Held for Investment - Del

Loans Held for Investment - Delinquencies (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Other information concerning the credit quality
Gross loans	$ 6,273,775	$ 6,222,053
Non-Accruing	8,149	3,284
Current
Other information concerning the credit quality
Current	6,261,021	6,211,994
30-59
Other information concerning the credit quality
Days Past Due	6,605	5,964
60-89
Other information concerning the credit quality
Days Past Due	1,084	1,056
90
Other information concerning the credit quality
Days Past Due	5,065	3,039
Business loans | Commercial and industrial
Other information concerning the credit quality
Gross loans	1,062,385	1,086,659
Non-Accruing	1,067	1,160
Business loans | Franchise
Other information concerning the credit quality
Gross loans	692,846	660,414
Non-Accruing	0	0
Business loans | Commercial owner occupied
Other information concerning the credit quality
Gross loans	1,284,528	1,295,215
Non-Accruing	3,475	97
Business loans | SBA
Other information concerning the credit quality
Gross loans	195,990	202,938
Non-Accruing	1,218	1,201
Business loans | Agribusiness
Other information concerning the credit quality
Gross loans	149,256	116,066
Non-Accruing	0	0
Business loans | Current | Commercial and industrial
Other information concerning the credit quality
Current	1,056,886	1,085,770
Business loans | Current | Franchise
Other information concerning the credit quality
Current	692,846	660,414
Business loans | Current | Commercial owner occupied
Other information concerning the credit quality
Current	1,280,900	1,291,255
Business loans | Current | SBA
Other information concerning the credit quality
Current	194,064	200,821
Business loans | Current | Agribusiness
Other information concerning the credit quality
Current	149,256	116,066
Business loans | 30-59 | Commercial and industrial
Other information concerning the credit quality
Days Past Due	5,241	84
Business loans | 30-59 | Franchise
Other information concerning the credit quality
Days Past Due	0	0
Business loans | 30-59 | Commercial owner occupied
Other information concerning the credit quality
Days Past Due	153	3,474
Business loans | 30-59 | SBA
Other information concerning the credit quality
Days Past Due	785	177
Business loans | 30-59 | Agribusiness
Other information concerning the credit quality
Days Past Due	0	0
Business loans | 60-89 | Commercial and industrial
Other information concerning the credit quality
Days Past Due	93	570
Business loans | 60-89 | Franchise
Other information concerning the credit quality
Days Past Due	0	0
Business loans | 60-89 | Commercial owner occupied
Other information concerning the credit quality
Days Past Due	0	486
Business loans | 60-89 | SBA
Other information concerning the credit quality
Days Past Due	991	0
Business loans | 60-89 | Agribusiness
Other information concerning the credit quality
Days Past Due	0	0
Business loans | 90 | Commercial and industrial
Other information concerning the credit quality
Days Past Due	165	235
Business loans | 90 | Franchise
Other information concerning the credit quality
Days Past Due	0	0
Business loans | 90 | Commercial owner occupied
Other information concerning the credit quality
Days Past Due	3,475	0
Business loans | 90 | SBA
Other information concerning the credit quality
Days Past Due	150	1,940
Business loans | 90 | Agribusiness
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | Commercial non-owner occupied
Other information concerning the credit quality
Gross loans	1,227,693	1,243,115
Non-Accruing	0	0
Real estate loans | Multi-family
Other information concerning the credit quality
Gross loans	817,963	794,384
Non-Accruing	1,231	0
Real estate loans | One-to-four family
Other information concerning the credit quality
Gross loans	266,324	270,894
Non-Accruing	1,134	817
Real estate loans | Construction
Other information concerning the credit quality
Gross loans	319,610	282,811
Non-Accruing	0	0
Real estate loans | Farmland
Other information concerning the credit quality
Gross loans	136,522	145,393
Non-Accruing	0	0
Real estate loans | Land
Other information concerning the credit quality
Gross loans	34,452	31,233
Non-Accruing	8	9
Real estate loans | Current | Commercial non-owner occupied
Other information concerning the credit quality
Current	1,227,693	1,243,115
Real estate loans | Current | Multi-family
Other information concerning the credit quality
Current	816,732	792,603
Real estate loans | Current | One-to-four family
Other information concerning the credit quality
Current	265,943	269,725
Real estate loans | Current | Construction
Other information concerning the credit quality
Current	319,610	282,811
Real estate loans | Current | Farmland
Other information concerning the credit quality
Current	136,522	145,393
Real estate loans | Current | Land
Other information concerning the credit quality
Current	34,363	31,141
Real estate loans | 30-59 | Commercial non-owner occupied
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 30-59 | Multi-family
Other information concerning the credit quality
Days Past Due	0	1,781
Real estate loans | 30-59 | One-to-four family
Other information concerning the credit quality
Days Past Due	345	354
Real estate loans | 30-59 | Construction
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 30-59 | Farmland
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 30-59 | Land
Other information concerning the credit quality
Days Past Due	81	83
Real estate loans | 60-89 | Commercial non-owner occupied
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 60-89 | Multi-family
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 60-89 | One-to-four family
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 60-89 | Construction
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 60-89 | Farmland
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 60-89 | Land
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 90 | Commercial non-owner occupied
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 90 | Multi-family
Other information concerning the credit quality
Days Past Due	1,231	0
Real estate loans | 90 | One-to-four family
Other information concerning the credit quality
Days Past Due	36	815
Real estate loans | 90 | Construction
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 90 | Farmland
Other information concerning the credit quality
Days Past Due	0	0
Real estate loans | 90 | Land
Other information concerning the credit quality
Days Past Due	8	9
Consumer Loans | Consumer loans
Other information concerning the credit quality
Gross loans	86,206	92,931
Non-Accruing	16	0
Consumer Loans | Current | Consumer loans
Other information concerning the credit quality
Current	86,206	92,880
Consumer Loans | 30-59 | Consumer loans
Other information concerning the credit quality
Days Past Due	0	11
Consumer Loans | 60-89 | Consumer loans
Other information concerning the credit quality
Days Past Due	0	0
Consumer Loans | 90 | Consumer loans
Other information concerning the credit quality
Days Past Due	$ 0	$ 40

Loans Held for Investment - C45

Loans Held for Investment - Company's Investment in Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Impaired Loans
Unpaid Principal Balance	$ 12,154	$ 6,896
Total impaired loans	8,149	3,284
With Specific Allowance	0	97
Without Specific Allowance	8,149	3,187
Specific Allowance for Impaired Loans	0	55	$ 0
Average Recorded Investment	7,844	6,779	829
Interest Income Recognized	0	0	17
Business loans | Commercial and industrial
Impaired Loans
Unpaid Principal Balance	1,520	1,585
Total impaired loans	1,067	1,160
With Specific Allowance	0	0
Without Specific Allowance	1,067	1,160
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	1,181	1,112	200
Interest Income Recognized	0	0	5
Business loans | Franchise
Impaired Loans
Specific Allowance for Impaired Loans	0		0
Business loans | Commercial owner occupied
Impaired Loans
Unpaid Principal Balance	3,598	98
Total impaired loans	3,475	97
With Specific Allowance	0	97
Without Specific Allowance	3,475	0
Specific Allowance for Impaired Loans	0	55	0
Average Recorded Investment	3,475	125	192
Interest Income Recognized	0	0	3
Business loans | SBA
Impaired Loans
Unpaid Principal Balance	4,575	4,329
Total impaired loans	1,218	1,201
With Specific Allowance	0	0
Without Specific Allowance	1,218	1,201
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	1,241	1,123	307
Interest Income Recognized	0	0	5
Real estate loans | Commercial non-owner occupied
Impaired Loans
Unpaid Principal Balance	0
Total impaired loans	0
With Specific Allowance	0
Without Specific Allowance	0
Specific Allowance for Impaired Loans	0
Real estate loans | Multi-family
Impaired Loans
Unpaid Principal Balance	1,231
Total impaired loans	1,231
With Specific Allowance	0
Without Specific Allowance	1,231
Specific Allowance for Impaired Loans	0		0
Real estate loans | One-to-four family
Impaired Loans
Unpaid Principal Balance	1,178	849
Total impaired loans	1,134	817
With Specific Allowance	0	0
Without Specific Allowance	1,134	817
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	1,024	341	116
Interest Income Recognized	0	0	3
Real estate loans | Construction
Impaired Loans
Specific Allowance for Impaired Loans	0		0
Average Recorded Investment	0	4,069	0
Interest Income Recognized	0	0	0
Real estate loans | Land
Impaired Loans
Unpaid Principal Balance	35	35
Total impaired loans	8	9
With Specific Allowance	0	0
Without Specific Allowance	8	9
Specific Allowance for Impaired Loans	0	0	0
Average Recorded Investment	8	9	14
Interest Income Recognized	0	0	1
Consumer Loans | Consumer loans
Impaired Loans
Unpaid Principal Balance	17
Total impaired loans	16
With Specific Allowance	0
Without Specific Allowance	16
Specific Allowance for Impaired Loans	0		0
Average Recorded Investment	94	0	0
Interest Income Recognized	$ 0	$ 0	$ 0

Loans Held for Investment - C46

Loans Held for Investment - Components of Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Nonaccruing loans	$ 8,149	$ 3,284
Accruing loans	0	0
Total impaired loans	$ 8,149	$ 3,284

Loans Held for Investment - Pur

Loans Held for Investment - Purchased Credit Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans Held for Investment
Unpaid Principal Balance	$ 12,154	$ 6,896
Business loans | Commercial and industrial
Loans Held for Investment
Unpaid Principal Balance	1,520	1,585
Business loans | Commercial owner occupied
Loans Held for Investment
Unpaid Principal Balance	3,598	98
Business loans | SBA
Loans Held for Investment
Unpaid Principal Balance	4,575	4,329
Real estate loans | Commercial non-owner occupied
Loans Held for Investment
Unpaid Principal Balance	0
Real estate loans | One-to-four family
Loans Held for Investment
Unpaid Principal Balance	1,178	849
Consumer Loans | Consumer loans
Loans Held for Investment
Unpaid Principal Balance	17
Acquired Banks
Loans Held for Investment
Unpaid Principal Balance	6,119	8,889
Acquired Banks | Business loans | Commercial and industrial
Loans Held for Investment
Unpaid Principal Balance	3,134	3,310
Acquired Banks | Business loans | Commercial owner occupied
Loans Held for Investment
Unpaid Principal Balance	1,016	1,262
Acquired Banks | Business loans | SBA
Loans Held for Investment
Unpaid Principal Balance	69	1,802
Acquired Banks | Real estate loans | Commercial non-owner occupied
Loans Held for Investment
Unpaid Principal Balance	1,122	1,650
Acquired Banks | Real estate loans | One-to-four family
Loans Held for Investment
Unpaid Principal Balance	0	255
Acquired Banks | Real estate loans | Construction/Land
Loans Held for Investment
Unpaid Principal Balance	768	600
Acquired Banks | Consumer Loans | Consumer loans
Loans Held for Investment
Unpaid Principal Balance	$ 10	$ 10

Loans Held for Investment - Acc

Loans Held for Investment - Accretable Yield Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Accretable yield on purchased credit impaired
Balance at the beginning of period	$ 3,019	$ 3,148	$ 3,747
Additions	0	1,066	0
Accretion	(236)	(308)	(629)
Payoffs	(1,850)	(2,164)	0
Reclassification from (to) nonaccretable difference	776	1,277	483
Balance at the end of period	$ 1,709	$ 3,019	$ 3,601

Allowance for Loan Losses (Deta

Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 28,936		$ 21,296
Charge-offs	(746)		(760)
Recoveries	59		37
Provisions for (reduction in) loan losses	2,253	$ 2,185	2,502
Balance, at the end of the period	30,502	28,936	23,075
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0	55	0
Amount of allowance attributed to: General portfolio allocation	30,502		23,075
Loans individually evaluated for impairment	$ 8,149		$ 513
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 6,236,603		$ 3,381,934
General reserves to total loans collectively evaluated for impairment	0.49%		0.68%
Gross loans, excluding loan receivable held for sale	$ 6,244,752		$ 3,382,447
Total allowance to gross loans	0.49%		0.68%
Business loans | Commercial and industrial
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 9,721		$ 6,362
Charge-offs	(665)		(752)
Recoveries	25		22
Provisions for (reduction in) loan losses	411		1,317
Balance, at the end of the period	9,492	9,721	6,949
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0	0	0
Amount of allowance attributed to: General portfolio allocation	9,492		6,949
Loans individually evaluated for impairment	$ 1,067		$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 1,061,318		$ 593,457
General reserves to total loans collectively evaluated for impairment	0.89%		1.17%
Gross loans, excluding loan receivable held for sale	$ 1,062,385		$ 593,457
Total allowance to gross loans	0.89%		1.17%
Business loans | Franchise
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 5,797		$ 3,845
Charge-offs	0		0
Recoveries	0		0
Provisions for (reduction in) loan losses	298		629
Balance, at the end of the period	6,095	5,797	4,474
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0		0
Amount of allowance attributed to: General portfolio allocation	6,095		4,474
Loans individually evaluated for impairment	$ 0		$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 692,846		$ 493,158
General reserves to total loans collectively evaluated for impairment	0.88%		0.91%
Gross loans, excluding loan receivable held for sale	$ 692,846		$ 493,158
Total allowance to gross loans	0.88%		0.91%
Business loans | Commercial owner occupied
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 767		$ 1,193
Charge-offs	0		0
Recoveries	8		12
Provisions for (reduction in) loan losses	16		27
Balance, at the end of the period	791	767	1,232
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0	55	0
Amount of allowance attributed to: General portfolio allocation	791		1,232
Loans individually evaluated for impairment	$ 3,475		$ 86
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 1,265,394		$ 482,209
General reserves to total loans collectively evaluated for impairment	0.06%		0.26%
Gross loans, excluding loan receivable held for sale	$ 1,268,869		$ 482,295
Total allowance to gross loans	0.06%		0.26%
Business loans | SBA
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 2,890		$ 1,039
Charge-offs	(29)		(8)
Recoveries	26		2
Provisions for (reduction in) loan losses	(73)		112
Balance, at the end of the period	2,814	2,890	1,145
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0	0	0
Amount of allowance attributed to: General portfolio allocation	2,814		1,145
Loans individually evaluated for impairment	$ 1,218		$ 298
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 181,408		$ 96,188
General reserves to total loans collectively evaluated for impairment	1.55%		1.19%
Gross loans, excluding loan receivable held for sale	$ 182,626		$ 96,486
Total allowance to gross loans	1.54%		1.19%
Business loans | Agribusiness
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 1,291
Charge-offs	0
Recoveries	0
Provisions for (reduction in) loan losses	814
Balance, at the end of the period	2,105	1,291
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0
Amount of allowance attributed to: General portfolio allocation	2,105
Loans individually evaluated for impairment	$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%
Loans collectively evaluated for impairment	$ 149,256
General reserves to total loans collectively evaluated for impairment	1.41%
Gross loans, excluding loan receivable held for sale	$ 149,256
Total allowance to gross loans	1.41%
Real estate loans | Commercial non-owner occupied
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 1,266
Charge-offs	0
Recoveries	0
Provisions for (reduction in) loan losses	71
Balance, at the end of the period	1,337	1,266
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0
Amount of allowance attributed to: General portfolio allocation	1,337
Loans individually evaluated for impairment	$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%
Loans collectively evaluated for impairment	$ 1,227,693
General reserves to total loans collectively evaluated for impairment	0.11%
Gross loans, excluding loan receivable held for sale	$ 1,227,693
Total allowance to gross loans	0.11%
Real estate loans | Multi-family
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 607		$ 2,927
Charge-offs	0		0
Recoveries	0		0
Provisions for (reduction in) loan losses	(15)		(124)
Balance, at the end of the period	592	607	2,803
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0		0
Amount of allowance attributed to: General portfolio allocation	592		2,803
Loans individually evaluated for impairment	$ 1,231		$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 816,732		$ 682,237
General reserves to total loans collectively evaluated for impairment	0.07%		0.41%
Gross loans, excluding loan receivable held for sale	$ 817,963		$ 682,237
Total allowance to gross loans	0.07%		0.41%
Real estate loans | One-to-four family
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 803		$ 365
Charge-offs	0		0
Recoveries	0		1
Provisions for (reduction in) loan losses	(58)		7
Balance, at the end of the period	745	803	373
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0	0	0
Amount of allowance attributed to: General portfolio allocation	745		373
Loans individually evaluated for impairment	$ 1,134		$ 115
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 265,190		$ 100,308
General reserves to total loans collectively evaluated for impairment	0.28%		0.37%
Gross loans, excluding loan receivable held for sale	$ 266,324		$ 100,423
Total allowance to gross loans	0.28%		0.37%
Real estate loans | Construction
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 4,569		$ 3,632
Charge-offs	0		0
Recoveries	0		0
Provisions for (reduction in) loan losses	506		395
Balance, at the end of the period	5,075	4,569	4,027
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0		0
Amount of allowance attributed to: General portfolio allocation	5,075		4,027
Loans individually evaluated for impairment	$ 0		$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 319,610		$ 298,279
General reserves to total loans collectively evaluated for impairment	1.59%		1.35%
Gross loans, excluding loan receivable held for sale	$ 319,610		$ 298,279
Total allowance to gross loans	1.59%		1.35%
Real estate loans | Farmland
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 137
Charge-offs	0
Recoveries	0
Provisions for (reduction in) loan losses	97
Balance, at the end of the period	234	137
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0
Amount of allowance attributed to: General portfolio allocation	234
Loans individually evaluated for impairment	$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%
Loans collectively evaluated for impairment	$ 136,522
General reserves to total loans collectively evaluated for impairment	0.17%
Gross loans, excluding loan receivable held for sale	$ 136,522
Total allowance to gross loans	0.17%
Real estate loans | Land
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 993		$ 198
Charge-offs	0		0
Recoveries	0		0
Provisions for (reduction in) loan losses	179		6
Balance, at the end of the period	1,172	993	204
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0	0	0
Amount of allowance attributed to: General portfolio allocation	1,172		204
Loans individually evaluated for impairment	$ 8		$ 14
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 34,444		$ 19,724
General reserves to total loans collectively evaluated for impairment	3.40%		1.03%
Gross loans, excluding loan receivable held for sale	$ 34,452		$ 19,738
Total allowance to gross loans	3.40%		1.03%
Consumer Loans | Consumer loans
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	$ 95		$ 20
Charge-offs	(52)		0
Recoveries	0		0
Provisions for (reduction in) loan losses	7		1
Balance, at the end of the period	50	$ 95	21
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	0		0
Amount of allowance attributed to: General portfolio allocation	50		21
Loans individually evaluated for impairment	$ 16		$ 0
Specific reserves to total loans individually evaluated for impairment	0.00%		0.00%
Loans collectively evaluated for impairment	$ 86,190		$ 3,930
General reserves to total loans collectively evaluated for impairment	0.06%		0.53%
Gross loans, excluding loan receivable held for sale	$ 86,206		$ 3,930
Total allowance to gross loans	0.06%		0.53%
Owner Occupied Commercial Real Estate Loans Commercial And Industrial Loans And Small Business Administration Loans
Allowance for Loan Losses
Period considered for comparison of allowance for loan losses factor (in years)	1 year
Period considered for comparison of entity's allowance for loan losses factor (in years)	1 year 4 months 24 days

Subordinated Debentures (Detail

Subordinated Debentures (Details)	Nov. 01, 2017USD ($)notes	Aug. 31, 2014USD ($)	Mar. 31, 2004USD ($)	Mar. 31, 2018USD ($)	Apr. 01, 2017USD ($)
PPBI Trust I
Subordinated Debentures
Floating Rate Trust Preferred Securities issue amount			$ 10,000,000
Notes
Subordinated Debentures
Debt issued		$ 60,000,000
Fixed interest rate (as a percent)		5.75%
Contribution of net proceeds from the Private Placement to the Bank to support general corporate purposes		$ 50,000,000
Subordinated Debentures
Subordinated Debentures
Floating interest rate, base rate				three-month LIBOR
Effective rate (as a percent)				4.47%
Subordinated Debentures | Mission Community Capital Trust I
Subordinated Debentures
Effective rate (as a percent)				4.67%
Floating rate junior subordinated debt				$ 2,800,000	$ 3,100,000
Purchase accounting fair value adjustments				$ 321,000
Subordinated Debentures | Santa Lucia Bancorp (CA) Capital Trust
Subordinated Debentures
Effective rate (as a percent)				3.20%
Floating rate junior subordinated debt				$ 3,800,000	5,200,000
Purchase accounting fair value adjustments				$ 1,400,000
Subordinated Debentures | Heritage Oaks Bancorp
Subordinated Debentures
Effective rate (as a percent)				3.41%
Floating rate junior subordinated debt				$ 3,900,000	$ 5,200,000
Purchase accounting fair value adjustments				$ 1,300,000
Subordinated Debentures | LIBOR
Subordinated Debentures
Floating interest rate, basis points added to base rate (as a percent)				2.75%
Subordinated Debentures | LIBOR | Mission Community Capital Trust I
Subordinated Debentures
Floating interest rate, basis points added to base rate (as a percent)				2.95%
Subordinated Debentures | LIBOR | Santa Lucia Bancorp (CA) Capital Trust
Subordinated Debentures
Floating interest rate, basis points added to base rate (as a percent)				1.48%
Subordinated Debentures | LIBOR | Heritage Oaks Bancorp
Subordinated Debentures
Floating interest rate, basis points added to base rate (as a percent)				1.72%
Subordinated Debentures | PPBI Trust I
Subordinated Debentures
Debt issued			$ 10,300,000
Minority interest purchased (as a percent)			3.00%
Amount of minority interest purchased			$ 310,000
Subordinated Notes 7.125% | Plaza Bancorp
Subordinated Debentures
Fixed interest rate (as a percent)	7.125%
Number of subordinated notes assumed | notes	3
Debt assumed in acquisition	$ 25,000,000
Redemption price (as a percent)	103.00%
Redemption price, subsequent reduction (as a percent)	50.00%

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Earnings Per Share [Abstract]
Weighted average stock options excluded (in shares)	0	1,228	0
Net Income
Basic income available to common stockholders	$ 28,002	$ 16,171	$ 9,521
Diluted income available to common stockholders plus assumed conversions	$ 28,002	$ 16,171	$ 9,521
Shares
Basic income available to common stockholders (in shares)	45,893,496	43,797,403	27,528,940
Dilutive effect of share-based compensation (in shares)	758,563	816,945	668,280
Diluted income available to common stockholders plus assumed conversions (in shares)	46,652,059	44,614,348	28,197,220
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.61	$ 0.37	$ 0.35
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.60	$ 0.36	$ 0.34

Fair Value of Financial Instr52

Fair Value of Financial Instruments - Fair Value Estimates (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets:
Investments held-to-maturity	$ 23,915	$ 18,082
Investment securities available-for-sale, at fair value	863,243	787,429
Accrued interest receivable	27,073	27,053
Level 1
Assets:
Cash and cash equivalents	128,996	200,064
Investments held-to-maturity	0	0
Investment securities available-for-sale, at fair value	0	0
Loans held for sale	0	0
Loans held for investment, net	0	0
Derivative asset	0	0
Accrued interest receivable	27,073	27,053
Liabilities:
Deposit accounts	5,074,330	5,001,053
FHLB advances	0	0
Other borrowings	0	0
Subordinated debentures	0	0
Derivative liability	0	0
Accrued interest payable	1,638	2,131
Level 1 | Interest-bearing time deposits with financial institutions
Assets:
Cash and cash equivalents	3,693	3,693
Level 2
Assets:
Cash and cash equivalents	0	0
Investments held-to-maturity	23,915	18,082
Investment securities available-for-sale, at fair value	863,243	787,429
Loans held for sale	31,255	23,524
Loans held for investment, net	0	0
Derivative asset	2,717	1,135
Accrued interest receivable	0	0
Liabilities:
Deposit accounts	1,109,351	1,074,564
FHLB advances	438,664	489,823
Other borrowings	43,991	46,373
Subordinated debentures	115,544	115,159
Derivative liability	2,717	1,135
Accrued interest payable	0	0
Level 2 | Interest-bearing time deposits with financial institutions
Assets:
Cash and cash equivalents	0	0
Level 3
Assets:
Cash and cash equivalents	0	0
Investments held-to-maturity	0	0
Investment securities available-for-sale, at fair value	0	0
Loans held for sale	0	0
Loans held for investment, net	6,254,567	6,269,366
Derivative asset	0	0
Accrued interest receivable	0	0
Liabilities:
Deposit accounts	0	0
FHLB advances	0	0
Other borrowings	0	0
Subordinated debentures	0	0
Derivative liability	0	0
Accrued interest payable	0	0
Level 3 | Interest-bearing time deposits with financial institutions
Assets:
Cash and cash equivalents	0	0
Carrying Amount
Assets:
Cash and cash equivalents	128,996	200,064
Investments held-to-maturity	24,559	18,291
Investment securities available-for-sale, at fair value	863,243	787,429
FHLB, FRB and other stock	82,115	65,881
Loans held for sale	29,034	23,426
Loans held for investment, net	6,241,841	6,167,532
Derivative asset	2,717	1,135
Accrued interest receivable	27,073	27,053
Liabilities:
Deposit accounts	6,192,273	6,085,868
FHLB advances	439,647	490,148
Other borrowings	43,876	46,139
Subordinated debentures	105,188	105,123
Derivative liability	2,717	1,135
Accrued interest payable	1,638	2,131
Carrying Amount | Interest-bearing time deposits with financial institutions
Assets:
Cash and cash equivalents	3,693	3,693
Estimated Fair Value
Assets:
Cash and cash equivalents	128,996	200,064
Investments held-to-maturity	23,915	18,082
Investment securities available-for-sale, at fair value	863,243	787,429
Loans held for sale	31,255	23,524
Loans held for investment, net	6,254,567	6,269,366
Derivative asset	2,717	1,135
Accrued interest receivable	27,073	27,053
Liabilities:
Deposit accounts	6,183,681	6,075,617
FHLB advances	438,664	489,823
Other borrowings	43,991	46,373
Subordinated debentures	115,544	115,159
Derivative liability	2,717	1,135
Accrued interest payable	1,638	2,131
Estimated Fair Value | Interest-bearing time deposits with financial institutions
Assets:
Cash and cash equivalents	$ 3,693	$ 3,693

Fair Value of Financial Instr53

Fair Value of Financial Instruments - Hierarchy Table - Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value Disclosures
Investment securities available-for-sale, at fair value	$ 863,243	$ 787,429
Agency
Fair Value Disclosures
Investment securities available-for-sale, at fair value	44,164	47,209
Corporate
Fair Value Disclosures
Investment securities available-for-sale, at fair value	104,406	79,546
Municipal bonds
Fair Value Disclosures
Investment securities available-for-sale, at fair value	223,657	232,128
Collateralized mortgage obligation: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	31,709	33,781
Mortgage-backed securities: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	459,307	394,765
Level 1
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Level 2
Fair Value Disclosures
Investment securities available-for-sale, at fair value	863,243	787,429
Level 3
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis
Fair Value Disclosures
Investment securities available-for-sale, at fair value	863,243	787,429
Recurring basis | Agency
Fair Value Disclosures
Investment securities available-for-sale, at fair value	44,164	47,209
Recurring basis | Corporate
Fair Value Disclosures
Investment securities available-for-sale, at fair value	104,406	79,546
Recurring basis | Municipal bonds
Fair Value Disclosures
Investment securities available-for-sale, at fair value	223,657	232,128
Recurring basis | Collateralized mortgage obligation: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	31,709	33,781
Recurring basis | Mortgage-backed securities: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	459,307	394,765
Recurring basis | Level 1
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 1 | Agency
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 1 | Corporate
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 1 | Municipal bonds
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 1 | Collateralized mortgage obligation: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 1 | Mortgage-backed securities: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 2
Fair Value Disclosures
Investment securities available-for-sale, at fair value	863,243	787,429
Recurring basis | Level 2 | Agency
Fair Value Disclosures
Investment securities available-for-sale, at fair value	44,164	47,209
Recurring basis | Level 2 | Corporate
Fair Value Disclosures
Investment securities available-for-sale, at fair value	104,406	79,546
Recurring basis | Level 2 | Municipal bonds
Fair Value Disclosures
Investment securities available-for-sale, at fair value	223,657	232,128
Recurring basis | Level 2 | Collateralized mortgage obligation: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	31,709	33,781
Recurring basis | Level 2 | Mortgage-backed securities: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	459,307	394,765
Recurring basis | Level 3
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 3 | Agency
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 3 | Corporate
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 3 | Municipal bonds
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 3 | Collateralized mortgage obligation: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	0	0
Recurring basis | Level 3 | Mortgage-backed securities: residential
Fair Value Disclosures
Investment securities available-for-sale, at fair value	$ 0	$ 0

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative assets, fair value	$ 2,717	$ 1,135
Derivative liabilities, fair value	2,717	1,135
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional	58,150	58,599
Derivative assets, fair value	2,717	1,135
Derivative liabilities, fair value	2,717	1,135
Not Designated as Hedging Instrument | Interest rate swap contracts
Derivative [Line Items]
Notional	58,150	58,599
Derivative assets, fair value	2,717	1,135
Derivative liabilities, fair value	$ 2,717	$ 1,135

Balance Sheet Offsetting (Detai

Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial assets:
Gross Amounts Recognized in the Consolidated Balance Sheets	$ 2,717	$ 1,833
Gross Amounts Offset in the Consolidated Balance Sheets	0	(698)
Net Amounts Presented in the Consolidated Balance Sheets	2,717	1,135
Financial Instruments	0	0
Cash Collateral	0	0
Net Amount	2,717	1,135
Financial liabilities:
Gross Amounts Recognized in the Consolidated Balance Sheets	2,717	1,135
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Net Amounts Presented in the Consolidated Balance Sheets	2,717	1,135
Financial Instruments	0	0
Cash Collateral	0	0
Net Amount	2,717	1,135
Not Designated as Hedging Instrument
Financial assets:
Gross Amounts Recognized in the Consolidated Balance Sheets	2,717	1,833
Gross Amounts Offset in the Consolidated Balance Sheets	0	(698)
Net Amounts Presented in the Consolidated Balance Sheets	2,717	1,135
Financial Instruments	0	0
Cash Collateral	0	0
Net Amount	2,717	1,135
Financial liabilities:
Gross Amounts Recognized in the Consolidated Balance Sheets	2,717	1,135
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Net Amounts Presented in the Consolidated Balance Sheets	2,717	1,135
Financial Instruments	0	0
Cash Collateral	0	0
Net Amount	$ 2,717	$ 1,135

Subsequent Events (Details)

Subsequent Events (Details) - Grandpoint Capital, Inc. $ in Billions	Feb. 09, 2018USD ($)bank
Subsequent Event [Line Items]
Total assets acquired	$ 3.2
Loans, gross	2.4
Deposits	$ 2.4
Number of regional offices | bank	14
Equity issued, ratio	0.4750