Banc of California (BANC) 10-Q 9 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 06, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	BANC
Entity Registrant Name	BANC OF CALIFORNIA, INC.
Entity Central Index Key	0001169770
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		50,367,355
Class B Non-Voting Non-Convertible Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		477,321

Consolidated Statements of Fina

Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 36,258	$ 21,875
Interest-earning deposits in financial institutions	268,447	369,717
Total cash and cash equivalents	304,705	391,592
Securities available-for-sale, at fair value	1,471,303	1,992,500
Loans held-for-sale, carried at fair value	25,191	7,690
Loans held-for-sale, carried at lower of cost or fair value	0	426
Loans and leases receivable	7,557,200	7,700,873
Allowance for loan and lease losses	(63,885)	(62,192)
Loans and leases receivable, net	7,493,315	7,638,681
Federal Home Loan Bank and other bank stock, at cost	55,794	68,094
Premises, equipment, and capital leases, net	130,417	129,394
Bank owned life insurance	107,552	107,027
Operating lease right-of-use assets	24,519
Goodwill	37,144	37,144
Investments in alternative energy partnerships, net	26,578	28,988
Deferred income taxes, net	45,111	49,404
Income tax receivable	4,787	2,695
Other intangible assets, net	5,726	6,346
Other assets	154,383	150,596
Assets of discontinued operations	0	19,490
Total assets	9,886,525	10,630,067
LIABILITIES AND STOCKHOLDERS’ EQUITY
Noninterest-bearing deposits	1,120,700	1,023,360
Interest-bearing deposits	6,604,232	6,893,284
Total deposits	7,724,932	7,916,644
Advances from Federal Home Loan Bank	935,000	1,520,000
Long term debt, net	173,203	173,174
Total Lease Liability	25,893
Accrued expenses and other liabilities	79,172	74,715
Total liabilities	8,938,200	9,684,533
Commitments and contingent liabilities
Preferred stock	231,128	231,128
Additional paid-in capital	626,608	625,834
Retained earnings	136,943	140,952
Treasury stock, at cost (1,583,380 shares at March 31, 2019 and December 31, 2018)	(28,786)	(28,786)
Accumulated other comprehensive loss, net	(18,091)	(24,117)
Total stockholders’ equity	948,325	945,534
Total liabilities and stockholders’ equity	9,886,525	10,630,067
Class A Common Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Common stock	518	518
Class B Common Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Common stock	$ 5	$ 5

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Common Stock:
Treasury stock (in shares)	1,583,380	1,583,380
Class A Common Stock
Common Stock:
Common stock, shares authorized (in shares)	446,863,844	446,863,844
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	51,898,870	51,755,398
Common stock, shares outstanding (in shares)	50,315,490	50,172,018
Class B Common Stock
Common Stock:
Common stock, shares authorized (in shares)	3,136,156	3,136,156
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	477,321	477,321
Common stock, shares outstanding (in shares)	477,321	477,321

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest and dividend income
Loans and leases, including fees	$ 90,558	$ 74,912
Securities	17,841	21,631
Other interest-earning assets	2,313	2,164
Total interest and dividend income	110,712	98,707
Interest expense
Deposits	31,443	16,795
Federal Home Loan Bank advances	9,081	7,392
Securities sold under repurchase agreements	18	750
Long term debt and other interest-bearing liabilities	2,362	2,332
Total interest expense	42,904	27,269
Net interest income	67,808	71,438
Provision for loan and lease losses	2,512	19,499
Net interest income after provision for loan and lease losses	65,296	51,939
Noninterest income
Customer service fees	1,515	1,592
Loan servicing income	118	2,311
Income from bank owned life insurance	525	533
Net gain on sale of securities available-for-sale	208	5,241
Net gain (loss) on sale of loans	1,553	(41)
Net loss on sale of mortgage servicing rights	0	(2,295)
Other income	2,376	1,241
Total noninterest income	6,295	8,582
Noninterest expense
Salaries and employee benefits	28,439	31,115
Occupancy and equipment	7,686	7,687
Professional fees	11,041	9,177
Outside service fees	403	2,546
Data processing	1,496	1,656
Advertising and promotion	2,057	3,277
Regulatory assessments	2,482	2,092
Loss (gain) on investments in alternative energy partnerships	1,950	(34)
Reversal of provision for loan repurchases	(116)	(1,788)
Amortization of intangible assets	620	843
Restructuring expense	2,795	0
All other expense	2,982	3,229
Total noninterest expense	61,835	59,800
Income from continuing operations before income taxes	9,756	721
Income tax expense (benefit)	2,719	(6,353)
Income from continuing operations	7,037	7,074
Income from discontinued operations before income taxes (including net gain on disposal of $0 and $1,003, respectively, for the three months ended March 31, 2019 and 2018)	0	2,044
Income tax expense	0	560
Income from discontinued operations	0	1,484
Net income	7,037	8,558
Preferred stock dividends	4,308	5,113
Net income available to common stockholders	$ 2,527	$ 3,242
Basic earnings per common share
Income from continuing operations (in usd per share)	$ 0.05	$ 0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	0.05	0.06
Diluted earnings per common share
Income from continuing operations (in usd per share)	0.05	0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	$ 0.05	$ 0.06
Distributed Earnings (Loss) Allocated to Participating Securities, Basic	$ 202	$ 203
Class A Common Stock
Noninterest expense
Income from continuing operations	6,971	7,003
Income from discontinued operations	0	1,469
Preferred stock dividends	$ 4,267	$ 5,062
Basic earnings per common share
Income from continuing operations (in usd per share)	$ 0.05	$ 0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	0.05	0.06
Diluted earnings per common share
Income from continuing operations (in usd per share)	0.05	0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	$ 0.05	$ 0.06
Distributed Earnings (Loss) Allocated to Participating Securities, Basic	$ 200	$ 201
Class B Common Stock
Noninterest expense
Income from continuing operations	66	71
Income from discontinued operations	0	15
Preferred stock dividends	$ 41	$ 51
Basic earnings per common share
Income from continuing operations (in usd per share)	$ 0.05	$ 0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	0.05	0.06
Diluted earnings per common share
Income from continuing operations (in usd per share)	0.05	0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	$ 0.05	$ 0.06
Distributed Earnings (Loss) Allocated to Participating Securities, Basic	$ 2	$ 2

Consolidated Statements of Op_2

Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net gain on disposal	$ 0	$ 1,003

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 7,037	$ 8,558
Unrealized gain (loss) on available-for-sale securities:
Unrealized gain (loss) arising during the period	6,173	(13,561)
Reclassification adjustment for gain included in net income	(147)	(3,704)
Total change in unrealized gain (loss) on available-for-sale securities	6,026	(17,265)
Total other comprehensive income (loss)	6,026	(17,265)
Comprehensive income (loss)	$ 13,063	$ (8,707)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common StockClass A Common Stock	Common StockClass B Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2017	$ 1,012,308	$ 269,071	$ 517	$ 5	$ 621,435	$ 144,839	$ (28,786)	$ 5,227
Comprehensive income (loss):
Net income	8,558
Other comprehensive income (loss), net	(17,265)							(17,265)
Share-based compensation expense	2,087				2,087
Restricted stock surrendered due to employee tax liability	(97)				(97)
Shares purchased under the Dividend Reinvestment Plan	(16)				58	(74)
Stock appreciation right dividend equivalents	(203)					(203)
Dividends declared	(6,503)					(6,503)
Preferred stock dividends	(5,113)					(5,113)
Ending Balance at Mar. 31, 2018	993,756	269,071	517	5	623,483	141,008	(28,786)	(11,542)
Beginning Balance at Dec. 31, 2018	945,534	231,128	518	5	625,834	140,952	(28,786)	(24,117)
Comprehensive income (loss):
Net income	7,037					7,037
Other comprehensive income (loss), net	6,026							6,026
Share-based compensation expense	853				853
Restricted stock surrendered due to employee tax liability	(79)				(79)
Shares purchased under the Dividend Reinvestment Plan	(50)					(50)
Stock appreciation right dividend equivalents	(202)					(202)
Dividends declared	(6,486)					(6,486)
Preferred stock dividends	(4,308)					(4,308)
Ending Balance at Mar. 31, 2019	$ 948,325	$ 231,128	$ 518	$ 5	$ 626,608	$ 136,943	$ (28,786)	$ (18,091)

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared, per common share (in dollars per share)	$ 0.13	$ 0.13

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 7,037	$ 8,558
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses	2,512	19,499
(Reversal of) provision for unfunded loan commitments	(414)	577
Reversal of provision for loan repurchases	(116)	(1,788)
Depreciation on premises and equipment	2,683	2,575
Amortization of intangible assets	620	843
Amortization of debt issuance cost	29	25
Net amortization of premium and discount on securities	286	73
Net amortization (accretion) of deferred loan costs and fees	289	(122)
Accretion of discounts on purchased loans	(97)	0
Deferred income tax expense (benefit)	1,785	(4,956)
Bank owned life insurance income	(525)	(533)
Share-based compensation expense	853	2,087
Loss (gain) on investments in alternative energy partnerships	1,950	(34)
Impairment on capitalized software projects	38	0
Net revenue from mortgage banking activities	0	(232)
Net (gain) loss on sale of loans	(1,553)	41
Net gain on sale of securities available for sale	(208)	(5,241)
Loss from change of fair value of mortgage servicing rights	191	920
Loss on sale or disposal of property and equipment	0	16
Loss on sale of mortgage servicing rights	0	2,295
Net gain on disposal of discontinued operations	0	(1,003)
Repurchase of mortgage loans	0	(9,670)
Originations of other loans held-for-sale	0	(773)
Proceeds from sales of and principal collected on loans held-for-sale from mortgage banking	2,139	10,629
Proceeds from sales of and principal collected on other loans held-for-sale	0	5
Change in accrued interest receivable and other assets	(5,245)	1,847
Change in accrued interest payable and other liabilities	6,282	(11,294)
Net cash provided by operating activities	18,536	14,344
Cash flows from investing activities:
Proceeds from sales of securities available-for-sale	502,606	190,917
Proceeds from maturities and calls of securities available-for-sale	19,078	96,600
Proceeds from principal repayments of securities available-for-sale	7,969	9,351
Purchases of securities available-for-sale	0	(100,754)
Loan and lease originations and principal collections, net	(100,702)	(291,593)
Redemption of Federal Home Loan Bank stock	23,341	0
Purchase of Federal Home Loan Bank and other bank stock	(11,041)	(7,061)
Proceeds from sale of loans	245,013	6,506
Proceeds from sale of other real estate owned	489	553
Proceeds from sale of mortgage servicing rights	0	27,347
Purchases of premises and equipment	(3,748)	(2,090)
Payments of capital lease obligations	(86)	(125)
Funding of equity investment, net	(574)	(275)
Net cash provided by (used in) investing activities	682,345	(70,624)
Cash flows from financing activities:
Net decrease in deposits	(191,712)	(182,738)
Net (decrease) increase in short-term Federal Home Loan Bank advances	(585,000)	30,000
Proceeds from long-term Federal Home Loan Bank advances	0	180,000
Purchase of restricted stock surrendered due to employee tax liability	(79)	(97)
Dividend equivalents paid on stock appreciation rights	(202)	(202)
Dividends paid on preferred stock	(4,308)	(5,113)
Dividends paid on common stock	(6,467)	(6,565)
Net cash (used in) provided by financing activities	(787,768)	15,285
Net change in cash and cash equivalents	(86,887)	(40,995)
Cash and cash equivalents at beginning of period	391,592	387,699
Cash and cash equivalents at end of period	304,705	346,704
Supplemental cash flow information
Interest paid on deposits and borrowed funds	39,436	25,430
Income taxes paid	2,372	31
Income taxes refunds received	0	(22)
Supplemental disclosure of non-cash activities
Transfer from loans to other real estate owned, net	276	0
Transfer of loans held-for-investment to loans held-for-sale	243,364	6,546
Equipment acquired under capital leases	30	496
Operating lease right of use assets recognized	26,365
Operating lease liabilities recognized	27,766
Due on unsettled securities purchases	0	59,000
Loans sold to Ginnie Mae that are subject to a repurchase option	$ 0	$ 6,774

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations: Banc of California, Inc. (collectively, with its consolidated subsidiaries, the Company, we, us and our) is a financial holding company under the Bank Holding Company Act of 1956, as amended, headquartered in Santa Ana, California and incorporated under the laws of Maryland. Banc of California, Inc. is subject to regulation by the Board of Governors of the Federal Reserve System (FRB) and its wholly owned subsidiary, Banc of California, National Association (the Bank), operates under a national bank charter issued by the Office of the Comptroller of the Currency (OCC), the Bank's primary regulator. The Bank is a member of the Federal Home Loan Bank (FHLB) system, and maintains insurance on deposit accounts with the Federal Deposit Insurance Corporation (FDIC). The Bank offers a variety of financial services to meet the banking and financial needs of the communities it serves, with operations conducted through 32 banking offices, serving San Diego, Los Angeles, Santa Barbara, and Orange counties in California as of March 31, 2019 . Basis of Presentation: The accompanying unaudited interim consolidated financial statements have been prepared pursuant to Article 10 of SEC Regulation S-X and other SEC rules and regulations for reporting on the Quarterly Report on Form 10-Q. Accordingly, certain disclosures required by U.S. generally accepted accounting principles (GAAP) are not included herein. These interim statements should be read in conjunction with the consolidated financial statements and notes included in the Annual Report on Form 10-K for the year ended December 31, 2018 filed by the Company with the SEC. The December 31, 2018 consolidated statements of financial condition presented herein has been derived from the audited financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC, but does not include all of the disclosures required by GAAP for complete financial statements. In the opinion of management of the Company, the accompanying unaudited interim consolidated financial statements reflect all of the adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the consolidated financial condition and consolidated results of operations as of the dates and for the periods presented. The results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 . Principles of Consolidation: The accompanying unaudited consolidated financial statements include the accounts of the Company and its consolidated subsidiaries as of March 31, 2019 and December 31, 2018 and for the three months ended March 31, 2019 and 2018 . Significant intercompany accounts and transactions have been eliminated in consolidation. Unless the context requires otherwise, all references to the Company include its then wholly owned subsidiaries. Significant Accounting Policies: The accounting and reporting policies of the Company are based upon GAAP and conform to predominant practices within the banking industry. The Company has not made any significant changes in its critical accounting policies from those disclosed in its Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC, except for the accounting for leases as described below. Leases. The Company determines if an arrangement is a lease at inception. The Company’s operating lease agreements are primarily for real estate space and are included within right of use (ROU) assets and lease liabilities on the consolidated balance sheets. The ROU asset is based on the operating lease liabilities adjusted for any prepaid or deferred rent. The Company has elected not to recognize on its consolidated balance sheet leases with terms of one-year or less. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, the Company uses its incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment, at lease commencement date in determining the present value of lease payments. Many of the Company’s lessee agreements include options to extend the lease, which the Company does not include in its minimum lease terms unless they are reasonably certain to be exercised. The Company elected the practical expedient to combine its lease and related nonlease components for the Company’s building leases. Rental expense for lease payments related to operating leases is recognized on a straight-line basis over the lease term Use of Estimates in the Preparation of Financial Statements: The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and disclosures provided, and actual results could differ. The allowance for loan and lease losses (ALLL), reserve for loss on repurchased loans, reserve for unfunded loan commitments, realization of deferred tax assets, the valuation of goodwill and other intangible assets, mortgage banking derivatives, Hypothetical Liquidation at Book Value (HLBV) of investments in alternative energy partnerships, and the fair value measurement of financial instruments are particularly subject to change and such change could have a material effect on the consolidated financial statements. Discontinued Operations: During the three months ended March 31, 2017, the Company completed the sale of its Banc Home Loans division, which largely represented the Company's Mortgage Banking segment. In accordance with Accounting Standards Codification (ASC) 205-20, the Company determined that the sale of the Banc Home Loans division and certain other mortgage banking related assets and liabilities that would be sold or settled separately within one year met the criteria to be classified as a discontinued operation and the related operating results and financial condition have been presented as discontinued operations on the consolidated financial statements. See Note 2 for additional information. Unless otherwise indicated, information included in these notes to the consolidated financial statements is presented on a consolidated operations basis, which includes results from both continuing and discontinued operations, as of December 31, 2018 and for the three months ended March 31, 2018 . There were no material assets, liabilities or operating income as of and for the three months ended March 31, 2019 related to discontinued operations. Restructuring Expense: During the first quarter March 31, 2019 , the Company continued to implement its strategic objective to de-emphasize the production of low margin loan products through its exit from the third-party mortgage origination ("TPMO") and brokered single family lending business. The Company recognized non-recurring costs of $2.8 million for the three months ended March 31, 2019 associated with the exit from the TPMO and brokered single family lending business and CEO transition. Adopted Accounting Pronouncements: During the three months ended March 31, 2019 , the following pronouncements applicable to the Company were adopted: In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (ASU) 2016-02 Topic 842, “Leases” which increases transparency and comparability among organizations by requiring the recognition of right of use (ROU) assets and lease liabilities on the balance sheet. Most prominent among the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted Topic 842 and related updates effective January 1, 2019 and used the effective date as the date of initial application, and therefore, periods prior to January 1, 2019 were not restated. The Company elected the package of practical expedients, which permits us not to reassess prior conclusions about lease identifications, lease classification and initial direct costs under the new standard. The Company did not elect to apply the hindsight practical expedient pertaining to using hindsight knowledge as of the effective date when determining lease terms and impairment. The Company also has elected the short-term lease recognition exemption (leases with terms 12 months or less) for all leases that qualify, and thus will not recognize ROU assets or lease liabilities for those leases. In addition, the Company elected the practical expedient to not separate lease and non-lease components for all of our leases. Upon adoption, the Company recognized on its balance sheet ROU assets of approximately $23.3 million (inclusive of an adjustment to remove the Company's existing deferred rent liability of approximately $1.4 million ) with a corresponding operating lease liability of approximately $24.7 million . The standard did not have an impact on our consolidated statements of operations. In addition, the Company's accounting for finance leases remained substantially unchanged.

SALE OF BUSINESS UNIT (DISCONTI

SALE OF BUSINESS UNIT (DISCONTINUED OPERATIONS)	3 Months Ended
	Mar. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
SALE OF BUSINESS UNIT (DISCONTINUED OPERATIONS)	SALE OF BUSINESS UNIT (DISCONTINUED OPERATIONS) Banc Home Loans Sale On March 30, 2017, the Company completed the sale of specific assets and activities related to its Banc Home Loans division to Caliber Home Loans, Inc. (Caliber). The Banc Home Loans division largely represented the Company's Mortgage Banking segment, the activities of which related to originating, servicing, underwriting, funding and selling single family residential (SFR) mortgage loans. Assets sold to Caliber included mortgage servicing rights (MSRs) on certain conventional agency SFR mortgage loans. The Banc Home Loans division, along with certain other mortgage banking related assets and liabilities that were sold or settled separately within one year, was classified as discontinued operations in the accompanying Consolidated Statements of Financial Condition and Consolidated Statements of Operations at December 31, 2018 and for the three months ended March 31, 2018 . Certain components of the Company’s Mortgage Banking segment, including MSRs on certain conventional agency SFR mortgage loans that were not sold as part of the Banc Home Loans sale and repurchase reserves related to previously sold loans, have been classified as continuing operations in the consolidated financial statements as they remain part of the Company’s ongoing operations. Refer to Note 2 of the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 for additional information related to this sale. For the three months ended March 31, 2019 and 2018 , the Company recognized gains related to the disposal of zero and $1.0 million , respectively. During the three months ended March 31, 2019 and 2018 , the Company recognized an earn-out of $492 thousand and $635 thousand , respectively. At March 31, 2019 there were no material assets or liabilities associated with discontinued operations. At December 31, 2018 , assets and liabilities of discontinued operations totaled $19.5 million and zero , respectively.

FAIR VALUES OF FINANCIAL INSTRU

FAIR VALUES OF FINANCIAL INSTRUMENTS	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
FAIR VALUES OF FINANCIAL INSTRUMENTS	FAIR VALUES OF FINANCIAL INSTRUMENTS Fair Value Hierarchy ASC 820-10 establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The topic describes three levels of inputs that may be used to measure fair value: • Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. • Level 2: Significant observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. • Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Assets and Liabilities Measured on a Recurring Basis Securities Available-for-Sale: The fair values of securities available-for-sale are generally determined by quoted market prices in active markets, if available (Level 1). If quoted market prices are not available, the Company primarily employs independent pricing services that utilize pricing models to calculate fair value. Such fair value measurements consider observable data such as dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information, and respective terms and conditions for debt instruments. The Company employs procedures to monitor the pricing service's assumptions and establishes processes to challenge the pricing service's valuations that appear unusual or unexpected. Level 2 securities include U.S. Small Business Administration (SBA) loan pool securities, U.S. government agency and U.S. government sponsored enterprise (GSE) residential mortgage-backed securities, non-agency residential mortgage-backed securities, non-agency commercial mortgage-backed securities, collateralized loan obligations, and corporate debt securities. When a market is illiquid or there is a lack of transparency around the inputs to valuation, including at least one unobservable input, the securities are classified as Level 3 and reliance is placed upon internally developed models, and management judgment and evaluation for valuation. The Company had no securities available-for-sale classified as Level 3 at March 31, 2019 or December 31, 2018 . Loans Held-for-Sale, Carried at Fair Value: The fair value of loans held-for-sale is based on commitments outstanding from investors as well as what secondary market investors are currently offering for portfolios with similar characteristics, except for loans that are repurchased out of GNMA loan pools that become severely delinquent which are valued based on an internal model that estimates the expected loss the Company will incur on these loans. Loans previously sold to GNMA that are delinquent more than 90 days are subject to a repurchase option when that condition exists. These loans are re-recognized at fair value and offset by a secured borrowing, as the loans are still legally owned by GNMA but failed sale accounting treatment under GAAP due to the repurchase option. Loans held-for-sale subject to recurring fair value adjustments are classified as Level 2 or, in the case of loans repurchased, Level 3. The fair value includes the servicing value of the loans as well as any accrued interest. As of March 31, 2019 and December 31, 2018 , there were no loans that were delinquent more than 90 days and eligible to be repurchased out of GNMA loan pools. Derivative Assets and Liabilities : Interest Rate Swaps and Caps. The Company offers interest rate swaps and caps products to certain loan customers to allow them to hedge the risk of rising interest rates on their variable rate loans. The Company originates a variable rate loan and enters into a variable-to-fixed interest rate swap with the customer. The Company also enters into an offsetting swap with a correspondent bank. These back-to-back agreements are intended to offset each other and allow the Company to originate a variable rate loan, while providing a contract for fixed interest payments for the customer. The net cash flow for the Company is equal to the interest income received from a variable rate loan originated with the customer. The fair value of these derivatives is based on a discounted cash flow approach. Due to the observable nature of the inputs used in deriving the fair value of these derivative contracts, the valuation of interest rate swaps is classified as Level 2. Foreign Exchange Contracts. The Company offers short-term foreign exchange contracts to its customers to purchase and/or sell foreign currencies at set rates in the future. These products allow customers to hedge the foreign exchange rate risk of their deposits and loans denominated in foreign currencies. In conjunction with these products the Company also enters into offsetting contracts with institutional counterparties to hedge the Company’s foreign exchange rate risk. These back-to-back contracts allow the Company to offer its customers foreign exchange products while minimizing its exposure to foreign exchange rate fluctuations. The fair value of these instruments is determined at each reporting period based on the change in the foreign exchange rate. Given the short-term nature of the contracts, the counterparties’ credit risks are considered nominal and resulted in no adjustments to the valuation of the short-term foreign exchange contracts. Due to the observable nature of the inputs used in deriving the fair value of these derivative contracts, the valuation of these contracts is classified as Level 2. The following table presents the Company’s financial assets and liabilities measured at fair value on a recurring basis as of the dates indicated: Fair Value Measurement Level ($ in thousands) Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2019 Assets Securities available-for-sale: SBA loan pools securities $ 820 $ — $ 820 $ — U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 434,461 — 434,461 — Non-agency residential mortgage-backed securities 331 — 331 — Collateralized loan obligations 1,035,691 — 1,035,691 — Loans held-for-sale, carried at fair value 25,191 — 2,122 23,069 Derivative assets: Interest rate swaps and caps (1) 2,309 — 2,309 — Foreign exchange contracts (1) 57 — 57 — Liabilities Derivative liabilities: Interest rate swaps and caps (2) 2,497 — 2,497 — Foreign exchange contracts (2) 32 — 32 — December 31, 2018 Assets Securities available-for-sale: SBA loan pools securities $ 910 $ — $ 910 $ — U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 437,442 — 437,442 — Non-agency residential mortgage-backed securities 427 — 427 — Non-agency commercial mortgage-backed securities 132,199 — 132,199 — Collateralized loan obligations 1,421,522 — 1,421,522 — Loans held-for-sale, carried at fair value (3) 27,180 — 2,140 25,040 Derivative assets: Interest rate swaps and caps (1) 1,534 — 1,534 — Liabilities Derivative liabilities: Interest rate swaps and caps (2) 1,600 — 1,600 — (1) Included in Other Assets in the Consolidated Statements of Financial Condition. (2) Included in Accrued Expenses and Other Liabilities in the Consolidated Statements of Financial Condition. (3) Includes loans held-for-sale carried at fair value of $19.5 million ( $2.1 million at Level 2 and $17.4 million at Level 3) of discontinued operations, which are included in Assets of Discontinued Operations in the Consolidated Statements of Financial Condition. The following table presents a reconciliation of assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3), on a consolidated operations basis, for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Loans repurchased from GNMA Loan Pools (1) Balance at beginning of period $ 25,040 $ 98,940 Total gains or losses (realized/unrealized): Included in earnings—fair value adjustment 3 (6 ) Additions — 24,620 Sales, settlements, and other (1,974 ) (80,592 ) Balance at end of period $ 23,069 $ 42,962 (1) Includes loans repurchased from GNMA Loan Pools of discontinued operations, which is included in Assets of Discontinued Operations in the Consolidated Statements of Financial Condition, of $17.3 million and $32.3 million , respectively, for the three months ended March 31, 2019 and 2018 in balance at beginning of period, and zero and $24.0 million , respectively, for the three months ended March 31, 2019 and 2018 in balance at end of period. The significant unobservable inputs used in the fair value measurement of the Company's loans repurchased from GNMA loan pools at March 31, 2019 and December 31, 2018 included an expected loss rate of 1.55 percent for insured loans and 20.00 percent for uninsured loans. There may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results. Fair Value Option Loans Held-for-Sale, Carried at Fair Value: The Company elected the fair value option for certain SFR mortgage loans held-for-sale. Electing to measure SFR mortgage loans held-for-sale at fair value reduces certain timing differences and better matches changes in the value of these assets with changes in the value of derivatives used as economic hedges for these assets. The Company also elected to record loans repurchased from GNMA at fair value, as the Company intends to sell them after curing any defects and, accordingly, they are classified as held-for-sale. Loans previously sold to GNMA that are delinquent more than 90 days are subject to a repurchase option when that condition exists. These loans are re-recognized at fair value and offset by a secured borrowing, as the loans are still legally owned by GNMA. The following table presents the fair value and aggregate principal balance of certain assets, on a consolidated operations basis, under the fair value option: March 31, 2019 December 31, 2018 ($ in thousands) Fair Value Unpaid Principal Balance Difference Fair Value Unpaid Principal Balance Difference Loans held-for-sale, carried at fair value in continuing operations: Total loans $ 25,191 $ 25,932 $ (741 ) $ 7,690 $ 7,906 $ (216 ) Non-accrual loans (1) 9,217 9,350 (133 ) 2,427 2,538 (111 ) Loans held-for-sale, carried at fair value in discontinued operations: Total loans $ — $ — $ — $ 19,490 $ 20,027 $ (537 ) Non-accrual loans (2) — — — 8,430 8,496 (66 ) (1) Includes loans guaranteed by the U.S. government of $8.0 million and $1.6 million , respectively, at March 31, 2019 and December 31, 2018 . (2) Includes loans guaranteed by the U.S. government of zero and $7.6 million , respectively, at March 31, 2019 and December 31, 2018 . There were no loans held-for-sale that were 90 days or more past due and still accruing interest as of March 31, 2019 and December 31, 2018 . The assets and liabilities accounted for under the fair value option are initially measured at fair value. Gains and losses from initial measurement and subsequent changes in fair value are recognized in earnings. The following table presents changes in fair value related to initial measurement and subsequent changes in fair value included in earnings for these assets and liabilities measured at fair value for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Net gains (losses) from fair value changes Net gain (loss) on sale of loans (continuing operations) $ 1 $ (15 ) Net revenue on mortgage banking activities (discontinued operations) — 8 Changes in fair value due to instrument-specific credit risk were insignificant for the three months ended March 31, 2019 and 2018 . Interest income on loans held-for-sale under the fair value option is measured based on the contractual interest rate and reported in Loans and Leases, including Fees under Interest and Dividend Income and Income from Discontinued Operations in the Consolidated Statements of Operations. Assets and Liabilities Measured on a Non-Recurring Basis Impaired Loans and Leases: The fair value of impaired loans and leases with specific allocations of the ALLL based on collateral is generally based on recent real estate appraisals and automated valuation models (AVMs). These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are typically deemed significant unobservable inputs used for determining fair value and result in a Level 3 classification. The following table presents the Company’s financial assets and liabilities measured at fair value on a non-recurring basis as of the dates indicated: Fair Value Measurement Level ($ in thousands) Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2019 Assets Impaired loans: Single family residential mortgage $ 674 $ — $ — $ 674 SBA 765 — — 765 December 31, 2018 Assets Impaired loans: SBA $ 226 — — $ 226 The following table presents the gains (losses) recognized on assets measured at fair value on a non-recurring basis for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Impaired loans: Single family residential mortgage $ (490 ) $ (115 ) Commercial and industrial — (60 ) SBA (54 ) (381 ) Other consumer (88 ) (141 ) Estimated Fair Values of Financial Instruments The following table presents the carrying amounts and estimated fair values of financial assets and liabilities, on a consolidated operations basis, as of the dates indicated: Carrying Amount Fair Value Measurement Level ($ in thousands) Level 1 Level 2 Level 3 Total March 31, 2019 Financial assets Cash and cash equivalents $ 304,705 $ 304,705 $ — $ — $ 304,705 Securities available-for-sale 1,471,303 — 1,471,303 — 1,471,303 Federal Home Loan Bank and other bank stock 55,794 — 55,794 — 55,794 Loans held-for-sale 25,191 — 2,122 23,069 25,191 Loans and leases receivable, net of ALLL 7,493,315 — — 7,360,071 7,360,071 Accrued interest receivable 36,468 36,468 — — 36,468 Derivative assets 2,366 — 2,366 — 2,366 Financial liabilities Deposits 7,724,932 — — 7,536,887 7,536,887 Advances from Federal Home Loan Bank 935,000 — 938,536 — 938,536 Long term debt 173,203 — 173,483 — 173,483 Derivative liabilities 2,529 — 2,529 — 2,529 Accrued interest payable 16,726 16,726 — — 16,726 December 31, 2018 Financial assets Cash and cash equivalents $ 391,592 $ 391,592 $ — $ — $ 391,592 Securities available-for-sale 1,992,500 — 1,992,500 — 1,992,500 Federal Home Loan Bank and other bank stock 68,094 — 68,094 — 68,094 Loans held-for-sale (1) 27,606 — 2,566 25,040 27,606 Loans and leases receivable, net of allowance 7,638,681 — — 7,513,910 7,513,910 Accrued interest receivable 38,807 38,807 — — 38,807 Derivative assets 1,534 — 1,534 — 1,534 Financial liabilities Deposits 7,916,644 — — 7,689,324 7,689,324 Advances from Federal Home Loan Bank 1,520,000 — 1,517,761 — 1,517,761 Long-term debt 173,174 — 174,059 — 174,059 Derivative liabilities 1,600 — 1,600 — 1,600 Accrued interest payable 13,253 13,253 — — 13,253 (1) Includes loans held-for-sale carried at fair value of $19.5 million ( $2.1 million at Level 2 and $17.4 million at Level 3) of discontinued operations.

INVESTMENT SECURITIES

INVESTMENT SECURITIES	3 Months Ended
	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES	INVESTMENT SECURITIES The following table presents the amortized cost and fair value of the investment securities portfolio as of the dates indicated: ($ in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value March 31, 2019 Securities available-for-sale: SBA loan pool securities $ 831 $ — $ (11 ) $ 820 U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 448,956 18 (14,513 ) 434,461 Non-agency residential mortgage-backed securities 319 12 — 331 Collateralized loan obligations 1,046,845 132 (11,286 ) 1,035,691 Total securities available-for-sale $ 1,496,951 $ 162 $ (25,810 ) $ 1,471,303 December 31, 2018 Securities available-for-sale: SBA loan pool securities $ 911 $ — $ (1 ) $ 910 U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 461,987 — (24,545 ) 437,442 Non-agency residential mortgage-backed securities 418 9 — 427 Non-agency commercial mortgage-backed securities 132,199 — — 132,199 Collateralized loan obligations 1,431,171 141 (9,790 ) 1,421,522 Total securities available-for-sale $ 2,026,686 $ 150 $ (34,336 ) $ 1,992,500 As of December 31, 2018 , the Company changed its intent and decided to sell its non-agency commercial mortgage-backed securities in an unrealized loss position due to its strategy to reposition its securities profile and recognized $3.3 million of OTTI losses during the fourth quarter of 2018. During the three months ended March 31, 2019 , the Company completed the sale of all remaining non-agency commercial mortgage-backed securities totaling $132.2 million resulting in a gain of $9 thousand . Additionally, during the three months ended March 31, 2019 , the Company sold $365.3 million in collateralized loan obligations resulting in a gain of $143 thousand . During the three months ended March 31, 2018, the Company completed the sale of all remaining corporate debt securities, totaling $76.8 million resulting in a gain of $4.9 million , to reposition its securities available-for-sale portfolio. At March 31, 2019 , the Company's investment securities portfolio consisted of SBA loan pool securities, mortgage-backed securities, and collateralized loan obligations. The expected maturities of these types of securities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. At March 31, 2019 and December 31, 2018 , there were no holdings of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10 percent of the Company's stockholders’ equity. The following table presents proceeds from sales and calls of securities available-for-sale and the associated gross gains and losses realized through earnings upon the sales and calls of securities available-for-sale for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Gross realized gains on sales and calls of securities available-for-sale $ 208 $ 5,241 Gross realized losses on sales and calls of securities available-for-sale — — Net realized gains on sales and calls of securities available-for-sale $ 208 $ 5,241 Proceeds from sales and calls of securities available-for-sale $ 521,684 $ 287,517 Investment securities with carrying values of $107.3 million and $163.0 million as of March 31, 2019 and December 31, 2018 , respectively, were pledged to secure FHLB advances, public deposits and for other purposes as required or permitted by law. The following table summarizes the investment securities with unrealized losses by security type and length of time in a continuous unrealized loss position as of the dates indicated: Less Than 12 Months 12 Months or Longer Total ($ in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses March 31, 2019 Securities available-for-sale: SBA loan pool securities $ 820 $ (11 ) $ — $ — $ 820 $ (11 ) U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 200,351 (6,653 ) 230,807 (7,860 ) 431,158 (14,513 ) Non-agency residential mortgage-backed securities 15 — 7 — 22 — Collateralized loan obligations 739,508 (10,437 ) 195,301 (849 ) 934,809 (11,286 ) Total securities available-for-sale $ 940,694 $ (17,101 ) $ 426,115 $ (8,709 ) $ 1,366,809 $ (25,810 ) December 31, 2018 Securities available-for-sale: SBA loan pool securities $ — $ — $ 910 $ (1 ) $ 910 $ (1 ) U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 13,494 (133 ) 423,916 (24,412 ) 437,410 (24,545 ) Non-agency residential mortgage-backed securities 90 — 16 — 106 — Collateralized loan obligations 1,364,317 (9,480 ) 32,790 (310 ) 1,397,107 (9,790 ) Total securities available-for-sale $ 1,377,901 $ (9,613 ) $ 457,632 $ (24,723 ) $ 1,835,533 $ (34,336 ) The Company did not record other-than-temporary-impairment (OTTI) for investment securities for the three months ended March 31, 2019 or 2018 . At March 31, 2019 , the Company’s securities available-for-sale portfolio consisted of 99 securities, 88 of which were in an unrealized loss position. At December 31, 2018 , the Company’s securities available-for-sale portfolio consisted of 145 securities, 118 of which were in an unrealized loss position. The Company monitors its securities portfolio to ensure it has adequate credit support. The majority of unrealized losses are related to the Company's mortgage-backed securities issued by U.S government sponsored entities and agencies. The Company also considers the lowest credit rating for identification of potential OTTI for other securities. As of March 31, 2019 , nearly all of the Company's non-agency mortgage-backed securities or collateralized loan obligations investment securities in an unrealized loss position received an investment grade credit rating. The decline in fair value is attributable to changes in interest rates, and not credit quality. The Company believes there was no OTTI as of March 31, 2019 and does not have the intent to sell its securities in an unrealized loss position and further believes it is not likely that it will be required to sell these securities before their anticipated recovery. The following table presents the composition and the repricing and yield information of the investment securities portfolio as of March 31, 2019: One year or less More than One Year through Five Years More than Five Years through Ten Years More than Ten Years Total ($ in thousands) Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Securities available-for-sale: SBA loan pool securities $ — — % $ — — % $ — — % $ 820 3.06 % $ 820 3.06 % U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 267 2.71 % 3,317 3.16 % — — % 430,877 3.06 % 434,461 3.03 % Non-agency residential mortgage-backed securities 76 3.96 % — — % — — % 255 5.57 % 331 5.20 % Collateralized loan obligations 1,035,691 4.25 % — — % — — % — — % 1,035,691 4.25 % Total securities available-for-sale $ 1,036,034 4.25 % $ 3,317 3.16 % $ — — % $ 431,952 3.03 % $ 1,471,303 3.89 %

LOANS AND LEASES AND ALLOWANCE

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES	LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES The following table presents the balances in the Company’s non-traditional mortgage (NTM) and traditional loans and leases portfolios as of the dates indicated: ($ in thousands) NTM Loans Traditional Loans and Leases Total Loans and Leases Receivable March 31, 2019 Commercial: Commercial and industrial $ — $ 1,907,102 $ 1,907,102 Commercial real estate — 865,521 865,521 Multifamily — 2,332,527 2,332,527 SBA — 74,998 74,998 Construction — 211,549 211,549 Consumer: Single family residential mortgage 788,054 1,314,640 2,102,694 Other consumer 2,351 60,458 62,809 Total loans and leases (1) $ 790,405 $ 6,766,795 $ 7,557,200 Percentage to total loans and leases 10.5 % 89.5 % 100.0 % Allowance for loan and lease losses (63,885 ) Loans and leases receivable, net $ 7,493,315 December 31, 2018 Commercial: Commercial and industrial $ — $ 1,944,142 $ 1,944,142 Commercial real estate — 867,013 867,013 Multifamily — 2,241,246 2,241,246 SBA — 68,741 68,741 Construction — 203,976 203,976 Consumer: Single family residential mortgage 824,318 1,481,172 2,305,490 Other consumer 2,413 67,852 70,265 Total loans and leases (1) $ 826,731 $ 6,874,142 $ 7,700,873 Percentage to total loans and leases 10.7 % 89.3 % 100.0 % Allowance for loan and lease losses (62,192 ) Loans and leases receivable, net $ 7,638,681 (1) Total loans and leases includes deferred loan origination costs/(fees) and premiums/(discounts), net of $16.8 million and $17.7 million , respectively, at March 31, 2019 and December 31, 2018 . Non-Traditional Mortgage Loans The Company’s NTM portfolio is comprised of three interest only products: Green Loans, Interest Only loans and a small number of additional loans with the potential for negative amortization. The following table presents the composition of the NTM portfolio as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Count Amount Percent Count Amount Percent Green Loans (HELOC) - first liens 83 $ 64,444 8.2 % 88 $ 67,729 8.2 % Interest-only - first liens 477 720,116 91.1 % 519 753,061 91.1 % Negative amortization 11 3,494 0.4 % 11 3,528 0.4 % Total NTM - first liens 571 788,054 99.7 % 618 824,318 99.7 % Green Loans (HELOC) - second liens 8 2,351 0.3 % 10 2,413 0.3 % Total NTM - second liens 8 2,351 0.3 % 10 2,413 0.3 % Total NTM loans 579 $ 790,405 100.0 % 628 $ 826,731 100.0 % Total loans and leases $ 7,557,200 $ 7,700,873 % of total NTM loans to total loans and leases 10.5 % 10.7 % Green Loans Green Loans are single family residential first and second mortgage lines of credit with a linked checking account that allows all types of deposits and withdrawals to be performed. These loans are generally interest only for a 15 -year term with a balloon payment due at maturity. At March 31, 2019 and December 31, 2018 , $292 thousand and $0 , respectively, of the Company's Green Loans were non-performing. As a result of their unique payment feature, Green Loans possess higher credit risk due to the potential for negative amortization; however, management believes the risk is mitigated through the Company’s loan terms and underwriting standards, including its policies on LTV ratios and the Company’s contractual ability to curtail loans when the value of the underlying collateral declines. The Company discontinued origination of Green Loans in 2011. Interest Only Loans Interest only loans are primarily single family residential first mortgage loans with payment features that allow interest only payments in initial periods before converting to a fully amortizing loan. At March 31, 2019 and December 31, 2018 , Interest Only loans totaled $720.1 million and $753.1 million , respectively. At March 31, 2019 and December 31, 2018 , none of the Interest Only loans were non-performing. Loans with the Potential for Negative Amortization Negative amortization loans totaled $3.5 million and $3.5 million at March 31, 2019 and December 31, 2018 , respectively. The Company discontinued origination of negative amortization loans in 2007. At March 31, 2019 and December 31, 2018 , none of the loans with the potential for negative amortization were non-performing. These loans pose a potentially higher credit risk because of the lack of principal amortization and potential for negative amortization; however, management believes the credit risk associated with these loans is mitigated through the loan terms and underwriting standards, including the Company’s policies on LTV ratios. Allowance for Loan and Lease Losses The Company has established credit risk management processes that include regular management review of the loan and lease portfolio to identify problem loans and leases. During the ordinary course of business, management may become aware of borrowers and lessees who may not be able to fulfill the contractual payment requirements of the loan and lease agreements. Such loans and leases are subject to increased monitoring. Consideration is given to placing the loan or lease on non-accrual status, assessing the need for additional ALLL, and partial or full charge off the principal balance. The Company maintains the ALLL at a level that is considered adequate to cover the estimated incurred losses in the loan and lease portfolio. The Company also maintains a separate reserve for unfunded loan commitments at a level that is considered adequate to cover the estimated incurred loss. The estimated funding of the loan commitments and credit risk factors are determined based on outstanding loans that share similar credit risk exposure are used to determine the adequacy of the reserve. At March 31, 2019 and December 31, 2018 , the reserve for unfunded loan commitments was $4.2 million and $4.6 million , respectively, which are included in Accrued Expenses and Other Liabilities on the Consolidated Statements of Financial Condition. The credit risk monitoring system is designed to identify impaired and potential problem loans, and to perform periodic evaluation of impairment and the adequacy of the allowance for credit losses in a timely manner. In addition, the Board of Directors of the Bank has adopted a credit policy that includes a credit review and control system that it believes should be effective in ensuring that the Company maintains an adequate allowance for loan and lease losses. The Board of Directors also provides oversight and guidance for management’s allowance evaluation process. The following table presents a summary of activity in the ALLL for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Balance at beginning of period $ 62,192 $ 49,333 Loans and leases charged off (1,063 ) (14,639 ) Recoveries of loans and leases previously charged off 244 570 Provision for loan and lease losses 2,512 19,499 Balance at end of period $ 63,885 $ 54,763 During the three months ended March 31, 2018, the Company recorded a charge-off of $13.9 million , which reflected the outstanding balance under a $15.0 million line of credit that was originated during the three months ended March 31, 2018. Subsequent to the granting of the line of credit, representations from the borrower in applying for the line of credit were determined by the Bank to be false, and third party bank account statements provided by the borrower to secure the line of credit were found to be fraudulent. The line of credit was granted after the borrower appeared to have satisfied a pre-condition that the line of credit be fully cash collateralized and secured by a bank account at a third party financial institution pledged to the Bank. As part of the Bank’s credit review and portfolio management process, the line of credit and disbursements were reviewed subsequent to closing and compliance with the borrower’s covenants was monitored. As part of this process, on March 9, 2018, the Bank received information that caused it to believe the existence of the pledged bank account had been misrepresented by the borrower and that the account had previously been closed. The Bank filed an action in federal court pursuing the borrower and other parties and is also considering other available sources of collection and other potential means of mitigating the loss; however, no assurance can be given that it will be successful in this regard. Upon extensive review of the underwriting process for this loan, the Bank determined that this loan was the result of an isolated event of external fraud. The following table presents the activity and balance in the ALLL and the recorded investment, excluding accrued interest, in loans and leases based on the impairment methodology as of or for the three months ended March 31, 2019 : ($ in thousands) Commercial and Industrial Commercial Real Estate Multifamily SBA Construction Lease Financing Single Family Residential Mortgage Other Consumer Total ALLL: Balance at December 31, 2018 $ 18,191 $ 6,674 $ 17,970 $ 1,827 $ 3,461 $ — $ 13,128 $ 941 $ 62,192 Charge-offs (93 ) — — (356 ) — — (526 ) (88 ) (1,063 ) Recoveries 33 — — 41 — 3 150 17 244 Provision (reversal) 762 164 928 1,545 (8 ) (3 ) (610 ) (266 ) 2,512 Balance at March 31, 2019 $ 18,893 $ 6,838 $ 18,898 $ 3,057 $ 3,453 $ — $ 12,142 $ 604 $ 63,885 Individually evaluated for impairment $ 48 $ — $ — $ 1,634 $ — $ — $ 230 $ 33 $ 1,945 Collectively evaluated for impairment 18,845 6,838 18,898 1,423 3,453 — 11,912 571 61,940 Total ending ALLL balance $ 18,893 $ 6,838 $ 18,898 $ 3,057 $ 3,453 $ — $ 12,142 $ 604 $ 63,885 Loans: Individually evaluated for impairment $ 4,861 $ 573 $ — $ 3,808 $ 2,519 $ — $ 20,362 $ 841 $ 32,964 Collectively evaluated for impairment 1,902,241 864,948 2,332,527 71,190 209,030 — 2,082,332 61,968 7,524,236 Total ending loan balances $ 1,907,102 $ 865,521 $ 2,332,527 $ 74,998 $ 211,549 $ — $ 2,102,694 $ 62,809 $ 7,557,200 The following table presents the activity and balance in the ALLL and the recorded investment, excluding accrued interest, in loans and leases based on the impairment methodology as of or for the three months ended March 31, 2018 : ($ in thousands) Commercial and Industrial Commercial Real Estate Multifamily SBA Construction Lease Financing Single Family Residential Mortgage Other Consumer Total ALLL: Balance at December 31, 2017 $ 14,280 $ 4,971 $ 13,265 $ 1,701 $ 3,318 $ — $ 10,996 $ 802 $ 49,333 Charge-offs (71 ) — — (381 ) — — (115 ) (14,072 ) (14,639 ) Recoveries 61 — — 65 — 4 436 4 570 Provision (reversal) 3,301 446 954 192 (98 ) (4 ) 652 14,056 19,499 Balance at March 31, 2018 $ 17,571 $ 5,417 $ 14,219 $ 1,577 $ 3,220 $ — $ 11,969 $ 790 $ 54,763 Individually evaluated for impairment $ 1,115 $ — $ — $ 124 $ — $ — $ 420 $ 21 $ 1,680 Collectively evaluated for impairment 16,456 5,417 14,219 1,453 3,220 — 11,549 769 53,083 Total ending ALLL balance $ 17,571 $ 5,417 $ 14,219 $ 1,577 $ 3,220 $ — $ 11,969 $ 790 $ 54,763 Loans: Individually evaluated for impairment $ 5,265 $ — $ — $ 359 $ — $ — $ 19,667 $ 766 $ 26,057 Collectively evaluated for impairment 1,633,294 773,193 1,944,082 78,663 200,766 3 2,181,691 92,758 6,904,450 Total ending loan balances $ 1,638,559 $ 773,193 $ 1,944,082 $ 79,022 $ 200,766 $ 3 $ 2,201,358 $ 93,524 $ 6,930,507 The following table presents loans and leases individually evaluated for impairment by class of loans and leases as of the dates indicated. The recorded investment, excluding accrued interest, presents customer balances net of any partial charge-offs recognized on the loans and leases and net of any deferred fees and costs and any purchase premium or discount. March 31, 2019 December 31, 2018 ($ in thousands) Unpaid Principal Balance Recorded Investment Allowance for Loan and Lease Losses Unpaid Principal Balance Recorded Investment Allowance for Loan and Lease Losses With no related ALLL recorded: Commercial: Commercial and industrial $ 4,849 $ 4,813 $ — $ 5,491 $ 5,455 $ — Commercial real estate 572 573 — — — — SBA 1,475 1,409 — 1,668 1,588 — Construction 2,519 2,519 — — — — Consumer: Single family residential mortgage 8,788 8,802 — 12,115 12,161 — Other consumer 469 469 — 469 469 — With an ALLL recorded: Commercial: Commercial and industrial 48 48 48 — — — SBA 2,499 2,399 1,634 823 788 562 Consumer: Single family residential mortgage 11,496 11,560 230 5,993 6,032 161 Other consumer 390 372 33 468 452 106 Total $ 33,105 $ 32,964 $ 1,945 $ 27,027 $ 26,945 $ 829 The following table presents information on impaired loans and leases, disaggregated by class, for the periods indicated: Three Months Ended ($ in thousands) Average Recorded Investment Interest Income Recognized Cash Basis Interest Recognized March 31, 2019 Commercial: Commercial and industrial $ 5,048 $ — $ — Commercial real estate 577 — — SBA 3,845 4 4 Construction 2,519 — — Consumer: Single family residential mortgage 19,323 58 49 Other consumer 844 3 3 Total $ 32,156 $ 65 $ 56 March 31, 2018 Commercial: Commercial and industrial $ 5,333 $ 3 $ 3 SBA 373 — — Consumer: Single family residential mortgage 19,715 57 49 Other consumer 749 3 2 Total $ 26,170 $ 63 $ 54 Past Due Loans and Leases The following table presents the aging of the recorded investment in past due loans and leases, excluding accrued interest receivable (which is not considered to be material), by class of loans and leases as of dates indicated: ($ in thousands) 30 - 59 Days Past Due 60 - 89 Days Past Due Greater than 89 Days Past due Total Past Due Current Total March 31, 2019 NTM loans: Single family residential mortgage $ 13,162 $ — $ 292 $ 13,454 $ 774,600 $ 788,054 Other consumer — — — — 2,351 2,351 Total NTM loans 13,162 — 292 13,454 776,951 790,405 Traditional loans and leases: Commercial: Commercial and industrial 1,702 1,759 3,386 6,847 1,900,255 1,907,102 Commercial real estate — 7,286 573 7,859 857,662 865,521 Multifamily — — — — 2,332,527 2,332,527 SBA 766 1,052 798 2,616 72,382 74,998 Construction 667 — 2,519 3,186 208,363 211,549 Consumer: Single family residential mortgage 15,687 930 6,683 23,300 1,291,340 1,314,640 Other consumer 1,826 3 372 2,201 58,257 60,458 Total traditional loans and leases 20,648 11,030 14,331 46,009 6,720,786 6,766,795 Total $ 33,810 $ 11,030 $ 14,623 $ 59,463 $ 7,497,737 $ 7,557,200 December 31, 2018 NTM loans: Single family residential mortgage $ 7,430 $ 617 $ — $ 8,047 $ 816,271 $ 824,318 Other consumer — — — — 2,413 2,413 Total NTM loans 7,430 617 — 8,047 818,684 826,731 Traditional loans and leases: Commercial: Commercial and industrial 350 1,596 3,340 5,286 1,938,856 1,944,142 Commercial real estate — 582 — 582 866,431 867,013 Multifamily 356 — — 356 2,240,890 2,241,246 SBA 551 77 862 1,490 67,251 68,741 Construction — 939 — 939 203,037 203,976 Consumer: Single family residential mortgage 7,321 3,160 9,198 19,679 1,461,493 1,481,172 Other consumer 3,132 573 446 4,151 63,701 67,852 Total traditional loans and leases 11,710 6,927 13,846 32,483 6,841,659 6,874,142 Total $ 19,140 $ 7,544 $ 13,846 $ 40,530 $ 7,660,343 $ 7,700,873 Non-accrual Loans and Leases The following table presents non-accrual loans and leases as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) NTM Loans Traditional Loans and Leases Total NTM Loans Traditional Loans and Leases Total Non-accrual loans and leases Commercial: Commercial and industrial $ — $ 4,859 $ 4,859 $ — $ 5,455 $ 5,455 Commercial real estate — 573 573 — — — SBA — 3,971 3,971 — 2,574 2,574 Construction — 2,519 2,519 — — — Consumer: Single family residential mortgage 292 14,978 15,270 — 12,929 12,929 Other consumer — 547 547 — 627 627 Total non-accrual loans and leases $ 292 $ 27,447 $ 27,739 $ — $ 21,585 $ 21,585 At March 31, 2019 and December 31, 2018 , $731 thousand and $470 thousand of loans were past due 90 days or more and still accruing. Loans in Process of Foreclosure At March 31, 2019 and December 31, 2018 , consumer mortgage loans of $4.0 million and $5.1 million , respectively, were secured by residential real estate properties for which formal foreclosure proceedings were in process according to local requirements of the applicable jurisdiction. Troubled Debt Restructurings A modification of a loan constitutes a troubled debt restructuring (TDR) when the Company, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider. The concessions may be granted in various forms, including reduction in the stated interest rate, reduction in the amount of principal amortization, forgiveness of a portion of the loan balance or accrued interest, or extension of the maturity date. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. Troubled debt restructured loans and leases consisted of the following as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) NTM Loans Traditional Loans Total NTM Loans Traditional Loans Total Commercial: Commercial and industrial $ — $ 1,943 $ 1,943 $ — $ 2,276 $ 2,276 SBA — 187 187 — 187 187 Consumer: Single family residential mortgage 2,660 2,433 5,093 2,668 2,596 5,264 Other consumer 294 — 294 294 — 294 Total $ 2,954 $ 4,563 $ 7,517 $ 2,962 $ 5,059 $ 8,021 The Company did not have any commitments to lend to customers with outstanding loans that were classified as TDRs as of March 31, 2019 or December 31, 2018 . Accruing TDRs were $5.6 million and non-accrual TDRs were $1.9 million at March 31, 2019 compared to accruing TDRs of $5.7 million and non-accrual TDRs of $2.3 million at December 31, 2018 . The following table summarizes the pre-modification and post-modification balances of the new TDRs for the periods indicated: Three Months Ended ($ in thousands) Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment March 31, 2019 Total — $ — $ — March 31, 2018 Commercial: Commercial and industrial 2 $ 171 $ 163 Total 2 $ 171 $ 163 The Company considers a TDR to be in payment default once it becomes 30 days or more past due following a modification. During the three months ended March 31, 2019 and 2018 , there were no loans and leases that were modified as TDRs during the past 12 months that had subsequent payment defaults during the periods. The following table summarizes TDRs by modification type for the periods indicated: Three Months Ended Modification Type Change in Principal Payments and Interest Rates Change in Principal Payments Total ($ in thousands) Count Amount Count Amount Count Amount March 31, 2019 Commercial: Commercial and industrial — $ — — $ — — $ — Total — $ — — $ — — $ — March 31, 2018 Commercial: Commercial and industrial — $ — 2 $ 163 2 $ 163 Total — $ — 2 $ 163 2 $ 163 Credit Quality Indicators The Company categorizes loans and leases into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company performs historical loss analysis that is combined with a comprehensive loan or lease to value analysis to analyze the associated risks in the current loan and lease portfolio. The Company analyzes loans and leases individually by classifying the loans and leases as to credit risk. This analysis includes all loans and leases delinquent over 60 days and non-homogeneous loans and leases such as commercial and commercial real estate loans and leases. The Company uses the following definitions for risk ratings: Pass : Loans and leases classified as pass are in compliance in all respects with the Bank’s credit policy and regulatory requirements, and do not exhibit any potential or defined weakness as defined under “Special Mention”, “Substandard” or “Doubtful”. Special Mention : Loans and leases classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or lease or of the Company’s credit position at some future date. Substandard : Loans and leases classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans and leases so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful : Loans and leases classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The following table presents the risk categories for total loans and leases as of the dates indicated: ($ in thousands) Pass Special Mention Substandard Doubtful Total March 31, 2019 NTM loans: Single family residential mortgage $ 772,205 $ 13,554 $ 2,295 $ — $ 788,054 Other consumer 2,351 — — — 2,351 Total NTM loans 774,556 13,554 2,295 — 790,405 Traditional loans and leases: Commercial: Commercial and industrial 1,806,891 43,511 56,700 — 1,907,102 Commercial real estate 847,213 13,741 4,567 — 865,521 Multifamily 2,329,615 — 2,912 — 2,332,527 SBA 60,082 4,316 9,798 802 74,998 Construction 201,254 5,105 5,190 — 211,549 Consumer: Single family residential mortgage 1,289,042 6,554 18,527 517 1,314,640 Other consumer 58,910 980 568 — 60,458 Total traditional loans and leases 6,593,007 74,207 98,262 1,319 6,766,795 Total $ 7,367,563 $ 87,761 $ 100,557 $ 1,319 $ 7,557,200 December 31, 2018 NTM loans: Single family residential mortgage $ 811,056 $ 10,966 $ 2,296 $ — $ 824,318 Other consumer 2,413 — — — 2,413 Total NTM loans 813,469 10,966 2,296 — 826,731 Traditional loans and leases: Commercial: Commercial and industrial 1,859,569 41,302 43,271 — 1,944,142 Commercial real estate 851,604 11,376 4,033 — 867,013 Multifamily 2,239,301 — 1,945 — 2,241,246 SBA 53,433 6,114 8,340 854 68,741 Construction 197,851 3,606 2,519 — 203,976 Consumer: Single family residential mortgage 1,461,721 2,602 16,849 — 1,481,172 Other consumer 66,228 979 645 — 67,852 Total traditional loans and leases 6,729,707 65,979 77,602 854 6,874,142 Total $ 7,543,176 $ 76,945 $ 79,898 $ 854 $ 7,700,873 Purchases, Sales, and Transfers From time to time, the Company purchases and sells loans in the secondary market. Certain loans are transferred from held-for-investment to held-for-sale at the lower of cost or fair value and any reductions in value on transfer are reflected as write-downs to allowance for loan losses. The Company had no purchases of loans and leases, excluding loans held-for-sale, for the three months ended March 31, 2019 and 2018 . The following table presents loans and leases transferred from (to) loans held-for-sale by portfolio segment for the periods indicated: Three Months Ended March 31, 2019 2018 ($ in thousands) Transfers from Held-For-Sale Transfers (to) Held-For-Sale Transfers from Held-For-Sale Transfers (to) Held-For-Sale Consumer: Single family residential mortgage $ — $ (243,364 ) $ — $ (2,184 ) Other consumer — — — (4,362 ) Total $ — $ (243,364 ) $ — $ (6,546 ) During the quarter, the Company sold $243.4 million in single family residential loans, resulting in a gain of $1.6 million .

LEASES

LEASES	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
LEASES	LEASES The Company has operating leases for corporate offices, branches and loan production offices. The Company’s leases have remaining lease terms of one month to twenty years , some of which include options to extend the leases generally for periods of three years to five years . Our lease agreements do not contain any material residual value guarantees or material restrictive covenants . The components of lease expense were as follows: Three Months Ended March 31, ($ in thousands) 2019 Operating Lease Expense $ 1,776 Variable Lease Expense 89 Sublease Income (235 ) Total Lease Expense $ 1,630 Supplemental cash flow information related to leases was as follows: Three Months Ended March 31, ($ in thousands) 2019 Cash paid for amounts included in the measurement of lease liabilities for operating leases: Operating cash flows $ 1,881 ROU assets obtained in the exchange for lease liabilities: Operating leases 26,365 Supplemental balance sheet information related to leases was as follows: ($ in thousands) March 31, Operating Leases: Operating lease right-of-use assets $ 24,519 Operating lease liabilities 25,893 March 31, 2019 Weighted-average remaining lease term (in years): Operating leases 6.80 years Weighted-average discount rate: Operating leases 2.85 % Maturities of lease liabilities at March 31, 2019 were as follows: ($ in thousands) Operating Leases Remainder of 2019 $ 4,868 2020 6,323 2021 4,553 2022 3,051 2023 2,278 2024 1,513 Thereafter 6,338 Total lease payments 28,924 Less: present value discount (3,031 ) Total Lease Liability $ 25,893 As of March 31, 2019 , we had additional operating leases, related to branches, that had not yet commenced, with $1.1 million in aggregate rent obligations. These operating leases will commence during 2019 with lease terms of 3 to 5 years .

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS, NET	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS, NET	GOODWILL AND OTHER INTANGIBLE ASSETS, NET At March 31, 2019 and December 31, 2018 , the Company had goodwill of $37.1 million . The Company evaluates goodwill impairment as of August 31 each year, and more frequently if events or circumstances indicate that there may be impairment. The Company completed its most recent annual goodwill impairment test (Step 0) as of August 31, 2018 and determined that no goodwill impairment existed. Core deposit intangibles are amortized over their useful lives ranging from four to ten years. As of March 31, 2019 , the weighted average remaining amortization period for core deposit intangibles was approximately 5.2 years . ($ in thousands) Gross Carrying Value Accumulated Amortization Net Carrying Value March 31, 2019 Core deposit intangibles $ 30,904 $ 25,178 $ 5,726 December 31, 2018 Core deposit intangibles $ 30,904 $ 24,558 $ 6,346 Aggregate amortization of intangible assets was $620 thousand and $843 thousand for the three months ended March 31, 2019 and 2018 , respectively. The following table presents estimated future amortization expenses as of March 31, 2019 : ($ in thousands) Remainder of 2019 2020 2021 2022 2023 2024 and After Total Estimated future amortization expense $ 1,575 $ 1,518 $ 1,082 $ 799 $ 517 $ 235 $ 5,726

FEDERAL HOME LOAN BANK ADVANCES

FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS	3 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS	FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS The following table presents the Company's advances from the FHLB as of the dates indicated: ($ in thousands) March 31, 2019 December 31, 2018 Fixed rate: Outstanding balance $ 805,000 $ 805,000 Interest rates ranging from 1.61 % 1.61 % Interest rates ranging to 3.32 % 3.32 % Weighted average interest rate 2.58 % 2.58 % Variable rate: Outstanding balance 130,000 715,000 Weighted average interest rate 2.60 % 2.56 % Each advance is payable at its maturity date. Advances paid early are subject to a prepayment penalty. At March 31, 2019 and December 31, 2018 , the Bank’s advances from the FHLB were collateralized by certain real estate loans with an aggregate unpaid principal balance of $3.66 billion and $4.05 billion , respectively. The Bank’s investment in capital stock of the FHLB of San Francisco totaled $28.7 million and $41.0 million at March 31, 2019 and December 31, 2018 , respectively. Based on this collateral and the Bank’s holdings of FHLB stock, the Bank was eligible to borrow an additional $1.72 billion at March 31, 2019 . The Bank maintained a line of credit of $21.0 million from the Federal Reserve Discount Window, to which the Bank pledged securities with a carrying value of $28.3 million , with no outstanding borrowings at March 31, 2019 . The Bank maintained available unsecured federal funds lines with correspondent banks totaling $185.0 million , with no outstanding borrowings at March 31, 2019 . The Bank also maintained repurchase agreements and had no outstanding securities sold under agreements to repurchase at March 31, 2019 and December 31, 2018 . Availabilities and terms on repurchase agreements are subject to the counterparties' discretion and the pledging of additional investment securities. On February 14, 2019, the Company entered into a new line of credit for $15.0 million , which bears interest at LIBOR plus 2.00% and has a maturity date of February 13, 2020. At March 31, 2019 , total borrowings under the line of credit were $0 .

LONG-TERM DEBT

LONG-TERM DEBT	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT The following table presents the Company's long-term debt as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Par Value Unamortized Debt Issuance Cost and Discount Par Value Unamortized Debt Issuance Cost and Discount 5.25% senior notes due April 15, 2025 $ 175,000 $ (1,797 ) $ 175,000 $ (1,826 ) Total $ 175,000 $ (1,797 ) $ 175,000 $ (1,826 ) Senior Notes On April 6, 2015, the Company completed the issuance and sale of $175.0 million aggregate principal amount of its 5.25 percent senior notes due April 15, 2025 (the Senior Notes). Net proceeds after discount were approximately $172.8 million . The Senior Notes are the Company’s senior unsecured debt obligations and rank equally with all of the Company’s other present and future unsecured unsubordinated obligations. The Company makes interest payments on the Senior Notes semi-annually in arrears. The Company may, at its option, on or after January 15, 2025 (i.e., 90 days prior to the maturity date of the Senior Notes), redeem the Senior Notes in whole at any time or in part from time to time, in each case on not less than 30 nor more than 60 days’ prior notice. The Senior Notes will be redeemable at a redemption price equal to 100 percent of the principal amount of the Senior Notes to be redeemed plus accrued and unpaid interest to the date of redemption. The Senior Notes were issued under the Senior Debt Securities Indenture, dated as of April 23, 2012 (the Base Indenture), as supplemented by the Second Supplemental Indenture dated as of April 6, 2015 (the Supplemental Indenture and together with the Base Indenture, the Indenture). The Indenture contains several covenants which, among other things, restrict the Company’s ability and the ability of the Company’s subsidiaries to dispose of or incur liens on the voting stock of certain subsidiaries and also contains customary events of default. The Company was in compliance with all covenants under the Indenture at March 31, 2019 .

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES For the three months ended March 31, 2019 and 2018 , income tax expense (benefit), on a consolidated operations basis, was $2.7 million and $(5.8) million , respectively, and the effective tax rate was 27.9 percent and (209.5) percent , respectively. The Company recognized an income tax benefit for the 2018 period mainly due to the recognition of tax credits from the investments in alternative energy partnerships of $7.3 million for the three months ended March 31, 2018 . All equipment was placed into service by the investments in alternative energy partnerships prior to 2019, thus no tax credits were generated from the investments for the three months ended March 31, 2019 . The Company uses the flow-through income statement method to account for the investment tax credits earned on the solar investments. Under this method, the investment tax credits are recognized as a reduction to income tax expense and the initial book-tax difference in the basis of the investments are recognized as additional tax expense in the year they are earned. The Company accounts for income taxes by recognizing deferred tax assets and liabilities based upon temporary differences between the amounts for financial reporting purposes and tax basis of its assets and liabilities. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. In assessing the realization of deferred tax assets, management will continue to evaluate both positive and negative evidence on a quarterly basis, including the reversal of its taxable temporary differences, the existence of its historical earnings, the amounts of future projected earnings as well as the tax expiration periods of its income tax credits. Based on this analysis, management determined that it was more likely than not that all of the deferred tax assets would be realized; therefore, no valuation allowance was provided against the net deferred tax assets of $45.1 million and $49.4 million at March 31, 2019 and December 31, 2018 , respectively. The overall decrease in net deferred tax assets was primarily due to an increase of $1.8 million in deferred tax liabilities resulting from year-to-date temporary book-tax differences and an increase of $2.5 million in deferred tax liabilities from the decrease of unrealized loss on securities available-for-sale. ASC 740-10-25 relates to the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements. ASC 740-10-25 prescribes a threshold and a measurement process for recognizing in the financial statements a tax position taken or expected to be taken in a tax return and also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. The Company had unrecognized tax benefits of $1.2 million and $1.2 million at March 31, 2019 and December 31, 2018 , respectively. The Company does not expect the total amount of unrecognized tax benefits to significantly change in the next twelve months. As of March 31, 2019 , the total unrecognized tax benefit that, if recognized, would impact the effective tax rate was $1.0 million . At March 31, 2019 and December 31, 2018 , the Company had no accrued interest or penalties. In the event the Company is assessed interest and/or penalties by federal or state tax authorities, such amounts will be classified in the consolidated financial statements as income tax expense. The Company and its subsidiaries are subject to U.S. Federal income tax as well as income tax in multiple state jurisdictions. The Company is no longer subject to the assessment of U.S. federal income tax for years before 2015. The statute of limitations for the assessment of California Franchise taxes has expired for tax years before 2014 (other state income and franchise tax statutes of limitations vary by state).

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS The Company uses derivative instruments and other risk management techniques to reduce its exposure to adverse fluctuations in interest rates in accordance with its risk management policies. Interest Rate Swaps and Caps on Loans: The Company offers interest rate swap and cap products to certain loan customers to allow them to hedge the risk of rising interest rates on their variable rate loans. When such products are issued, the Company also enters into an offsetting swap with institutional counterparties to eliminate the interest rate risk. These back-to-back agreements are intended to offset each other and allow the Company to retain the credit risk of the transaction with its customer in exchange for a fee. The net cash flow for the Company is equal to the interest income received from a variable rate loan originated with the customer plus the fee. These swaps and caps are not designated as hedging instruments and are recorded at fair value in Other Assets and Accrued Expenses and Other Liabilities in the Consolidated Statements of Financial Condition. The changes in fair value are recorded in Other Income in the Consolidated Statements of Operations. For the three months ended March 31, 2019 and 2018 , changes in fair value recorded through Other Income in the Consolidated Statements of Operations were insignificant. Foreign Exchange Contracts: The Company offers short-term foreign exchange contracts to its customers to purchase and/or sell foreign currencies at set rates in the future. These products allow customers to hedge the foreign exchange rate risk of their deposits and loans denominated in foreign currencies. In conjunction with these products the Company also enters into offsetting contracts with institutional counterparties to hedge the Company’s foreign exchange rate risk. These back-to-back contracts allow the Company to offer its customers foreign exchange products while minimizing its exposure to foreign exchange rate fluctuations. These foreign exchange contracts are not designated as hedging instruments and are recorded at fair value in Other Assets and Accrued Expenses and Other Liabilities on the Consolidated Statements of Financial Condition. For the three months ended March 31, 2019 and 2018 , changes in fair value recorded through Other Income in the Consolidated Statements of Operations were insignificant. The following table presents the notional amount and fair value of derivative instruments included in the Consolidated Statements of Financial Condition as of the dates indicated. March 31, 2019 December 31, 2018 ($ in thousands) Notional Amount Fair Value Notional Amount Fair Value Included in assets: Interest rate swaps and caps on loans $ 131,960 $ 2,309 $ 103,812 $ 1,534 Foreign exchange contracts 1,896 57 — — Total included in other assets $ 133,856 $ 2,366 $ 103,812 $ 1,534 Included in liabilities: Interest rate swaps and caps on loans $ 131,960 $ 2,497 $ 103,812 1,600 Foreign exchange contracts 1,896 32 — — Total included in accrued expenses and other liabilities $ 133,856 $ 2,529 $ 103,812 $ 1,600 The Company has entered into agreements with counterparty financial institutions, which include master netting agreements that provide for the net settlement of all contracts with a single counterparty in the event of default. However, the Company elected to account for all derivatives with counterparty institutions on a gross basis. Due to clearinghouse rule changes, variation margin payments are treated as settlements of derivative exposure rather than as collateral.

EMPLOYEE STOCK COMPENSATION

EMPLOYEE STOCK COMPENSATION	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
EMPLOYEE STOCK COMPENSATION	EMPLOYEE STOCK COMPENSATION On May 31, 2018 (the Effective Date), the Company's stockholders approved the Company's 2018 Omnibus Stock Incentive Plan (2018 Omnibus Plan). As of the Effective Date, the Company discontinued granting awards under the Company’s 2013 Omnibus Incentive Plan (2013 Omnibus Plan) or any prior equity incentive plans and future stock-based compensation awards to its directors and employees will be made pursuant to the 2018 Omnibus Plan. The 2018 Omnibus Plan provides that the maximum number of shares that will be available for awards is 4,417,882 , which represents the number of shares that were available for new awards under the 2013 Omnibus Plan immediately prior to the Effective Date. As of March 31, 2019 , 4,212,347 shares were available for future awards. Stock-based Compensation Expense The following table presents stock-based compensation expense and the related tax benefits for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Stock options $ 8 $ 33 Restricted stock awards and units 845 2,054 Total share-based compensation expense $ 853 $ 2,087 Related tax benefits $ 251 $ 612 The following table presents unrecognized stock-based compensation expense as of March 31, 2019 : ($ in thousands) Unrecognized Expense Weighted-Average Remaining Expected Recognition Period Stock option awards $ 90 1.1 years Restricted stock awards and restricted stock units 6,911 2.1 years Total $ 7,001 2.1 years Stock Options The Company has issued stock options to certain employees, officers and directors. Stock options are issued at the closing market price immediately before the grant date, and generally have a three to five year vesting period and contractual terms of seven to ten years. The Company recognizes an income tax deduction upon exercise of a stock option to the extent taxable income is recognized by the option holder. In the case of a non-qualified stock option, the option holder recognizes taxable income based on the fair market value of the shares acquired at the time of exercise less the exercise price. The following table represents stock option activity for the three months ended March 31, 2019 : Three Months Ended March 31, 2019 ($ in thousands except per share data) Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contract Term Aggregated Intrinsic Value Outstanding at beginning of period 186,973 $ 13.54 5.8 years Forfeited (16,000 ) $ 13.29 6.1 years Outstanding at end of period 170,973 $ 13.56 5.5 years $ 47 Exercisable at end of period 123,125 $ 13.67 5.3 years $ 21 The following table sets forth information regarding unvested stock options for the three months ended March 31, 2019 . Three Months Ended March 31, 2019 Number of Shares Weighted-Average Exercise Price Per Share Outstanding at beginning of period 63,848 $ 13.30 Forfeited (16,000 ) $ 13.29 Outstanding at end of period 47,848 $ 13.30 Restricted Stock Awards and Restricted Stock Units The Company also has granted restricted stock awards and restricted stock units to certain employees, officers and directors. The restricted stock awards and units are valued at the closing price of the Company’s stock on the measurement date. The restricted stock awards and units fully vest after a specified period (generally ranging from one to five years ) of continued service from the date of grant plus, in some cases, the satisfaction of performance conditions. These performance targets include conditions relating to the Company’s profitability and regulatory standing. The actual amounts of stock released upon vesting will be determined by the Compensation Committee of the Company's Board of Directors upon the Committee's certification of the satisfaction of the target level of performance. The Company recognizes an income tax deduction in an amount equal to the taxable income reported by the holders of the restricted stock, generally upon vesting or, in the case of restricted stock units, when settled. The following table presents unvested restricted stock awards and restricted stock units activity for the three months ended March 31, 2019 : Three Months Ended March 31, 2019 Number of Shares Weighted Average Grant Date Fair Value Per Share Outstanding at beginning of period 833,601 $ 19.02 Granted (1) 135,594 $ 14.75 Vested (2) (13,441 ) $ 16.99 Forfeited (3) (107,110 ) $ 20.38 Outstanding at end of period 848,644 $ 18.20 (1) There were no performance-based shares/units included in shares granted for the three months ended March 31, 2019 . (2) There were no performance-based shares/units included in vested shares for the three months ended March 31, 2019 . (3) The number of forfeited shares includes aggregate performance-based shares/units of 72,567 for the three months ended March 31, 2019 . Stock Appreciation Rights On August 21, 2012, the Company granted to it then-acting chief executive officer, Steven A. Sugarman, a ten-year stock appreciation right (SAR). The following table represents SARs activity and the weighted average exercise price per share as of and for the three months ended March 31, 2019 : Three Months Ended March 31, 2019 ($ in thousands except per share data) Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contract Term Aggregated Intrinsic Value Outstanding at beginning of period 1,559,012 $ 11.60 3.6 years $ 2,662 Outstanding at end of period 1,559,012 $ 11.60 3.4 years $ 3,488 Exercisable at end of period 1,559,012 $ 11.60 3.4 years $ 3,488

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Warrants On November 1, 2010 , the Company also issued warrants to COR Advisors LLC (COR Advisors), an entity controlled by Steven A. Sugarman, who became a director of the Company on that date and later became President and Chief Executive Officer of the Company (and resigned from those and all other positions with the Company and the Bank on January 23, 2017). The warrants entitled COR Advisors to purchase up to 1,395,000 shares of non-voting common stock at an exercise price of $11.00 per share, subject to certain adjustments to the number of shares underlying the warrants as well as certain adjustments to the warrant exercise price as applicable. On August 3, 2011, COR Advisors transferred warrants for the right to purchase 960,000 shares of non-voting common stock to COR Capital Holdings LLC (COR Capital Holdings), an entity controlled by Steven A. Sugarman, and transferred warrants for the right to purchase the remaining 435,000 shares of non-voting common stock to Jeffrey T. Seabold, the Company's then- (now former) Executive Vice President and Management Vice-Chair. On August 22, 2012, COR Capital Holdings transferred its warrants for the right to purchase 960,000 shares of non-voting common stock to a living trust for Steven A. Sugarman and his spouse. These warrants vested in tranches, with each tranche being exercisable for five years after the tranche's vesting date. With respect to the warrants transferred by COR Capital Holdings to the living trust for Steven A. Sugarman and his spouse, warrants to purchase 50,000 shares vested on October 1, 2011 and the remainder vested in seven equal quarterly installments beginning January 1, 2012 and ending on July 1, 2013. With respect to the warrants transferred by COR Advisors to Mr. Seabold, warrants to purchase 95,000 shares vested on January 1, 2011; warrants to acquire 130,000 shares vested on each of April 1 and July 1, 2011, and warrants to purchase 80,000 shares vested on October 1, 2011. On August 17, 2016, the living trust for Steven A. Sugarman and his spouse transferred warrants to purchase 480,000 shares to Steven A. Sugarman's brother, Jason Sugarman. These transferred warrants were last exercisable on September 30, 2016, December 31, 2016, March 31, 2017, June 30, 2017 and September 30, 2017 for 50,000 , 130,000 , 130,000 , 130,000 , and 40,000 shares, respectively. On August 17, 2016, Jason Sugarman irrevocably elected to fully exercise each tranche of the transferred warrants. Under his irrevocable election, Jason Sugarman directed that each such exercise would occur on the last exercisable date for each tranche using a cashless (net) exercise method and also directed that each exercise be for either non-voting common stock, or, if allowed under the terms of the warrant, for voting common stock. At September 30, 2016, December 31, 2016, March 31, 2017, June 30, 2017 and September 30, 2017, in accordance with Jason Sugarman’s irrevocable election, warrants to purchase 50,000 , 130,000 , 130,000 , 130,000 , and 40,000 shares, respectively, had been exercised, resulting in issuances of 25,051 and 64,962 shares of the Company's voting common stock and 75,875 , 77,376 and 23,237 shares of the Company's non-voting common stock, respectively. Based on automatic adjustments to the original $11.00 exercise price, the exercise price at the time of exercise was $8.80 , $8.72 , $8.66 , $8.61 and $8.55 per share, respectively. As a result of these exercises, Jason Sugarman no longer holds any warrants to purchase shares of the Company’s stock. During the three months ended June 30, 2018, based on additional documentation received from Jason Sugarman, it was determined that Jason Sugarman was eligible to receive voting common stock under the terms of the transferred warrant for the exercises that previously occurred on March 31, 2017, June 30, 2017 and September 30, 2017. Accordingly, on June 6, 2018, an aggregate of 176,488 shares of the Company's non-voting common stock owned by Jason Sugarman were canceled and he was issued 176,488 shares of the Company's voting common stock in lieu thereof. On August 16, 2016, the living trust for Steven A. Sugarman and his spouse irrevocably elected to exercise its warrants to purchase 480,000 shares. Under its irrevocable election, the living trust for Steven A. Sugarman and his spouse directed that each such exercise would occur on the last exercisable date for each tranche of such warrants (September 30, 2017, December 31, 2017, March 31, 2018 and June 30, 2018 with respect to 90,000 , 130,000 , 130,000 , and 130,000 shares, respectively) using a cashless net exercise method and also directed that each exercise be for non-voting common stock. On September 30, 2017, in accordance with its irrevocable election, warrants to purchase 90,000 shares were exercised by the living trust for Steven A. Sugarman and his spouse, resulting in the issuance of 52,284 shares of the Company's non-voting common stock. Based on an automatic adjustment to the original $11.00 exercise price, the exercise price at the time of exercise was $8.55 per share. On each of December 27, 2017, March 30, 2018 and June 29, 2018, the Company was notified that the living trust for Steven A. Sugarman and his spouse purportedly transferred warrants with respect to 130,000 shares, with a last exercisable date of December 31, 2017, 130,000 shares with a last exercisable date of March 31, 2018 and 130,000 shares with a last exercisable date of June 30, 2018, respectively, to a separate entity, Sugarman Family Partners. In accordance with the irrevocable election to exercise previously submitted by the living trust for Steven A. Sugarman and his spouse, the Company considered these transferred warrants to have been exercised with respect to 130,000 shares on December 31, 2017, 130,000 shares on March 31, 2018 and 130,000 shares on June 30, 2018, respectively, resulting in the issuance of 77,413 , 72,159 , and 73,543 shares of the Company's non-voting common stock, respectively, on December 31, 2017, April 2, 2018 and July 2, 2018, respectively. Based on an automatic adjustment to the original $11.00 exercise price, the exercise price at the time of exercise was $8.49 per share, $8.44 per share and $8.38 per share, respectively. As a result of these exercises, none of these warrants remain outstanding. On December 8, 2015, March 9, 2016, June 17, 2016, and September 30, 2016, Mr. Seabold exercised his warrants with respect to 95,000 , 130,000 , 130,000 , and 80,000 shares, respectively, using cashless (net) exercises, resulting in a net number of shares of non-voting common stock issued in the aggregate of 37,355 , 53,711 , 70,775 , and 40,081 , respectively. Based on automatic adjustments to the original $11.00 exercise price, the exercise price at the time of exercise was $9.04 , $8.90 , $8.84 , and $8.80 per share, respectively. As a result of these exercises, Mr. Seabold no longer holds any warrants to purchase shares of the Company's stock. Under the terms of the respective warrants, the warrants were exercisable for voting common stock in lieu of non-voting common stock following a transfer of the warrants under certain circumstances described in the terms of the warrants. The terms and issuance of the foregoing warrants were approved by the Company's stockholders at a special meeting held on October 25, 2010. Preferred Stock The Company is authorized to issue 50,000,000 shares of preferred stock with par value of $0.01 per share. Preferred shares outstanding rank senior to common shares both as to dividends and liquidation preference but generally have no voting rights. All of the Company's outstanding shares of preferred stock have a $1,000 per share liquidation preference. The following table presents the Company's total outstanding preferred stock as of dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Shares Authorized and Outstanding Liquidation Preference Carrying Value Shares Authorized and Outstanding Liquidation Preference Carrying Value Series C 8.00% non-cumulative perpetual $ — $ — $ — $ — $ — $ — Series D 7.375% non-cumulative perpetual 115,000 115,000 110,873 115,000 115,000 110,873 Series E 7.00% non-cumulative perpetual 125,000 125,000 120,255 125,000 125,000 120,255 Total $ 240,000 $ 240,000 $ 231,128 $ 240,000 $ 240,000 $ 231,128 On September 17, 2018, the Company completed the redemption of all 40,250 outstanding shares of the Company's 8.00 percent Series C Non-Cumulative Perpetual Preferred Stock (Series C Preferred Stock), which resulted in the simultaneous redemption of all 1,610,000 of the outstanding related depositary shares (Series C Depository Shares), each representing a 1/40 th interest in a share of Series C Preferred Stock, at a redemption price of the liquidation amount of $1,000 per share of Series C Preferred Stock (equivalent to $25 per Series C Depository Share). The redemption price represented an aggregate amount of $40.3 million and did not accrue interest from and following the regularly scheduled dividend payment date of September 15, 2018. Deferred stock issuance costs of $2.3 million originally recorded as a reduction to preferred stock upon issuance of the Series C Preferred Stock were reclassified to retained earnings and resulted in a one-time, non-cash reduction to net income allocated to common stockholders. Change in Accumulated Other Comprehensive Income (Loss) The Company’s AOCI includes unrealized gain (loss) on securities available-for-sale. Changes to AOCI are presented net of tax effect as a component of stockholders' equity. Reclassifications from AOCI are recorded on the Consolidated Statements of Operations either as a gain or loss. The following table presents changes to AOCI for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Unrealized gain (loss) on securities available-for-sale Balance at beginning of period $ (24,117 ) $ 5,227 Unrealized gain (loss) arising during the period 8,746 (19,682 ) Reclassification adjustment from other comprehensive income (208 ) (5,241 ) Tax effect of current period changes (2,512 ) 7,658 Total changes, net of taxes 6,026 (17,265 ) Reclassification of stranded tax effects to retained earnings — 496 Balance at end of period $ (18,091 ) $ (11,542 )

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
VARIABLE INTEREST ENTITIES	VARIABLE INTEREST ENTITIES T he Company holds ownership interests in alternative energy partnerships and qualified affordable housing partnerships. The Company evaluates its interests in these entities to determine whether they meet the definition of a variable interest entity (VIE) and whether the Company is required to consolidate these entities. A VIE is consolidated by its primary beneficiary, which is the party that has both (i) the power to direct the activities that most significantly impact the economic performance of the VIE and (ii) a variable interest that could potentially be significant to the VIE. To determine whether or not a variable interest the Company holds could potentially be significant to the VIE, the Company considers both qualitative and quantitative factors regarding the nature, size and form of the Company's involvement with the VIE. The Company has determined that its interests in these entities meet the definition of a variable interest. Unconsolidated VIEs Alternative Energy Partnerships The Company invests in certain alternative energy partnerships (limited liability companies) formed to provide sustainable energy projects that are designed to generate a return primarily through the realization of federal tax credits (energy tax credits). These entities were formed to invest in newly installed residential rooftop solar leases and power purchase agreements. As a result of its investments, the Company has the right to certain investment tax credits and tax depreciation benefits (recognized on the flow through and income statement method in accordance with ASC 740), and to a lesser extent, cash flows generated from the installed solar systems leased to individual consumers for a fixed period of time. While the Company's interest in the alternative energy partnerships meets the definition of a VIE in accordance with ASC 810, the Company has determined that the Company is not the primary beneficiary because the Company does not have the power to direct the activities that most significantly impact the economic performance of the entities including operational and credit risk management activities. As the Company is not the primary beneficiary, the Company did not consolidate the entities. The Company uses the Hypothetical Liquidation at Book Value (HLBV) method to account for these investments in energy tax credits as an equity investment under ASC 970-323-25-17. Under the HLBV method, an equity method investor determines its share of an investee's earnings by comparing its claim on the investee's book value at the beginning and end of the period, assuming the investee were to liquidate all assets at their U.S. GAAP amounts and distribute the resulting cash to creditors and investors under their respective priorities. The difference between the calculated liquidation distribution amounts at the beginning and the end of the reporting period, after adjusting for capital contributions and distributions, is the Company’s share of the earnings or losses from the equity investment for the period. To account for the tax credits earned on investments in alternative energy partnerships, the Company uses the flow-through income statement method. Under this method, the tax credits are recognized as a reduction to income tax expense and the initial book-tax differences in the basis of the investments are recognized as additional tax expense in the year they are earned. During the three months ended March 31, 2019 and 2018 , the Company did not fund or receive any return of capital from its alternative energy partnerships. During the three months ended March 31, 2019 and 2018 , the Company recognized a loss on investment of $2.0 million and a gain on investment of $34 thousand , respectively, through its HLBV application. As a result, the balance of these investments was $26.6 million and $48.3 million , respectively, at March 31, 2019 and 2018 . From an income tax benefit perspective, the Company recognized investment tax credits of zero and $7.3 million during the three months ended March 31, 2019 and 2018 , respectively, as well as income tax benefits (expense) relating to the recognition of its loss (gain) through its HLBV application during these periods. The following table represents the carrying value of the associated unconsolidated assets and liabilities and the associated maximum loss exposure for alternative energy partnerships as of the dates indicated: ($ in thousands) March 31, 2019 December 31, 2018 Cash $ 4,694 $ 3,012 Equipment, net of depreciation 257,475 259,464 Other assets 4,470 4,470 Total unconsolidated assets $ 266,639 $ 266,946 Total unconsolidated liabilities $ 6,269 $ 6,269 Maximum loss exposure $ 26,578 $ 28,988 The maximum loss exposure that would be absorbed by the Company in the event that all of the assets in alternative energy partnerships are deemed worthless is $26.6 million , which is the Company's recorded investment amount at March 31, 2019 . The Company believes that the loss exposure on its investment is reduced considering that the return on its investment is provided not only by the cash flows of the underlying customer leases and power purchase agreements, but also through the significant tax benefits, including federal tax credits generated from the investments. In addition, the arrangements include a transition manager to support any transition of the solar company sponsor whose role includes that of the servicer and operation and maintenance provider, in the event the sponsor would be required to be removed from its responsibilities (e.g., bankruptcy, breach of contract, etc.), thereby further limiting the Company’s exposure. Qualified Affordable Housing Partnerships The Company also invests in limited partnerships that operate qualified affordable housing projects. The returns on these investments are generated primarily through allocated Federal tax credits and other tax benefits. In addition, these investments contribute to the Company's compliance with the Community Reinvestment Act. These limited partnerships are considered to be VIEs, because either (i) they do not have sufficient equity investment at risk or (ii) the limited partners with equity at risk do not have substantive kick-out rights through voting rights or substantive participating rights over the general partner. As a limited partner, the Company is not the primary beneficiary because the general partner has the ability to direct the activities of the VIEs that most significantly impact their economic performance. Therefore, the Company does not consolidate these partnerships. At March 31, 2019 and December 31, 2018 , the Company had a total investment in qualified affordable housing projects of $19.3 million and $20.0 million , respectively. During the three months ended March 31, 2019 , the Company funded $454 thousand , and recognized proportional amortization expense of $637 thousand . The Company has funded $18.2 million of its $29.3 million aggregated funding commitments and had an unfunded commitment of $11.1 million at March 31, 2019 . During the three months ended March 31, 2018 , the Company funded $14 thousand , into qualified affordable housing projects and recognized proportional amortization expense of $497 thousand . From an income tax benefit perspective, the Company recognized investment tax credits of $555 thousand and $475 thousand , respectively, during the three months ended March 31, 2019 and 2018 . At March 31, 2019 and December 31, 2018 , the maximum loss exposure that would be absorbed by the Company in the event that all of the assets in this investment are deemed worthless is $19.3 million and $20.0 million , respectively, which is the Company's recorded investment amount. The recorded investment amount is included in Other Assets in the Consolidated Statements of Financial Condition and the proportional amortization expense is recorded in Income Tax Expense (Benefit) in the Consolidated Statements of Operations. As the investments in alternative energy partnerships and qualified affordable housing partnerships represent unconsolidated VIEs to the Company, the assets and liabilities of the investments themselves are not recorded on the Company's Statements of Financial Condition.

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
EARNINGS PER COMMON SHARE	EARNINGS PER COMMON SHARE The following table presents computations of basic and diluted earnings per common share for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 ($ in thousands except per share data) Common Stock Class B Common Stock Total Common Stock Class B Common Stock Total Income from continuing operations $ 6,971 $ 66 $ 7,037 $ 7,003 $ 71 $ 7,074 Less: participating securities dividends (200 ) (2 ) (202 ) (201 ) (2 ) (203 ) Less: preferred stock dividends (4,267 ) (41 ) (4,308 ) (5,062 ) (51 ) (5,113 ) Income from continuing operations allocated to common stockholders 2,504 23 2,527 1,740 18 1,758 Income from discontinued operations — — — 1,469 15 1,484 Net income allocated to common stockholders $ 2,504 $ 23 $ 2,527 $ 3,209 $ 33 $ 3,242 Weighted average common shares outstanding 50,199,401 477,321 50,676,722 50,082,438 508,107 50,590,545 Dilutive effects of stock units 160,299 — 160,299 135,649 — 135,649 Dilutive effects of stock options 9,700 — 9,700 47,701 — 47,701 Dilutive effects of warrants — — — 151,635 — 151,635 Average shares and dilutive common shares 50,369,400 477,321 50,846,721 50,417,423 508,107 50,925,530 Basic earnings per common share Income from continuing operations $ 0.05 $ 0.05 $ 0.05 $ 0.03 $ 0.03 $ 0.03 Income from discontinued operations — — — 0.03 0.03 0.03 Net income $ 0.05 $ 0.05 $ 0.05 $ 0.06 $ 0.06 $ 0.06 Diluted earnings per common share Income from continuing operations $ 0.05 $ 0.05 $ 0.05 $ 0.03 $ 0.03 $ 0.03 Income from discontinued operations — — — 0.03 0.03 0.03 Net income $ 0.05 $ 0.05 $ 0.05 $ 0.06 $ 0.06 $ 0.06 For the three months ended March 31, 2019 , there were 180,304 stock units and 16,165 stock options that were not considered in computing diluted earnings per common share, because they were anti-dilutive. For the three months ended March 31, 2018, there were 1,288 stock units and 0 stock options that were not considered in computing diluted earnings per common share, because they were anti-dilutive.

LOAN COMMITMENTS AND OTHER RELA

LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES	LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES Some financial instruments, such as loan commitments, credit lines, letters of credit, and overdraft protection, are issued to meet customer financing needs. These are agreements to provide credit or to support the credit of others, as long as conditions established in the contract are met, and usually have expiration dates. Commitments may expire without being used. Risk of credit loss exists up to the face amount of these instruments. The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of the commitment. The contractual amount of financial instruments with off-balance-sheet risk was as follows for the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to extend credit (1) $ 2,168 $ 261,740 $ 2,167 $ 288,770 Unused lines of credit 935 1,105,354 1,514 1,119,158 Letters of credit 1,793 6,786 1,266 8,561 (1) Included no commitments to extend credit related to discontinued operations at December 31, 2018 . Other Commitments During the three months ended March 31, 2017, the Bank entered into certain definitive agreements which grant the Bank the exclusive naming rights to the Banc of California Stadium, a soccer stadium of The Los Angeles Football Club (LAFC), as well as the right to be the official bank of LAFC. In exchange for the Bank’s rights as set forth in the agreements, the Bank agreed to pay LAFC $100.0 million over a period of 15 years , beginning in 2017 and ending in 2032. The advertising benefits of such rights are amortized on a straight-line basis and recorded as advertising and promotion expense beginning in 2018. During the three months ended March 31, 2019 and 2018 , advertising and promotion expense related to the LAFC commitment was $1.7 million . As of March 31, 2019 , the Bank has paid $16.7 million of the $100.0 million commitment. The prepaid commitment balance, net of amortization, was $8.4 million as of March 31, 2019 , which was recognized as a prepaid asset and included in Other Assets in the Consolidated Statements of Financial Condition. See Note 18 for additional information. At March 31, 2019 , the Company had unfunded commitments of $11.1 million , $8.6 million , and $500 thousand for affordable housing fund investments, Small Business Investment Company (SBIC) investments, and other investments, respectively.

REVENUE RECOGNITION

REVENUE RECOGNITION	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION	REVENUE RECOGNITION The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606 - Revenue From Contracts With Customers , for the periods indicated. Three Months Ended March 31, ($ in thousands) 2019 2018 Noninterest income In scope of Topic 606 Deposit service fees $ 667 $ 778 Debit card fees 113 225 Investment commissions 279 323 Other 106 155 Noninterest income (in-scope of Topic 606) 1,165 1,481 Noninterest income (out-of-scope of Topic 606) 5,130 7,101 Total noninterest income $ 6,295 $ 8,582 The Company does not typically enter into long-term revenue contracts with customers. As of March 31, 2019 and December 31, 2018, the Company did not have any significant contract balances. As of March 31, 2019 , the Company did not capitalize any contract acquisition costs.

RELATED-PARTY TRANSACTIONS

RELATED-PARTY TRANSACTIONS	3 Months Ended
	Mar. 31, 2019
Related Party Transactions [Abstract]
RELATED-PARTY TRANSACTIONS	RELATED-PARTY TRANSACTIONS General. The Bank has granted loans to certain executive officers and directors and their related interests and to the Bank's affiliated entities. Excluding the loan amounts described in detail below, loans outstanding to persons who were executive officers and directors, and their related interests as well as to the Bank's affiliated entities amounted to zero and zero , at March 31, 2019 and December 31, 2018 , respectively, all of which were performing in accordance with their respective terms as of those dates. These loans were made in the ordinary course of business and on substantially the same terms and conditions, including interest rates and collateral, as those of comparable transactions with non-insiders prevailing at the time, in accordance with the Bank’s underwriting guidelines, and do not involve more than the normal risk of collectability or present other unfavorable features. The Bank has an Employee Loan Program which is available to all employees and offers executive officers, directors and principal stockholders that meet the eligibility requirements the opportunity to participate on the same terms as employees generally, provided that any loan to an executive officer, director or principal stockholder must be approved by the Bank’s Board of Directors. The sole benefit provided under the Employee Loan Program is a reduction in loan fees. Deposits from executive officers, directors, and their related interests amounted to $26.6 million and $11.1 million at March 31, 2019 and December 31, 2018 , respectively. There are certain deposits described below, which are not included in the foregoing amounts. Transactions with Current Related Parties The Company and the Bank have engaged in transactions described below with the Company’s directors, executive officers, and beneficial owners of more than 5 percent of the outstanding shares of the Company’s voting common stock and certain persons related to them. Indemnification for Costs of Counsel in Connection with Special Committee Investigation, SEC Investigation and Related Matters. On November 3, 2016, in connection with an investigation by the Special Committee of the Company’s Board of Directors, the Company Board authorized and directed the Company to provide indemnification, advancement and/or reimbursement for the costs of separate independent counsel retained by any then-current officer or director, in their individual capacity, with respect to matters related to the investigation, and to advise them on their rights and obligations with respect to the investigation. At the direction of the Company Board, this indemnification, advancement and/or reimbursement is, to the extent applicable, subject to the indemnification agreement that each officer and director previously entered into with the Company, which includes an undertaking to repay any expenses advanced if it is ultimately determined that the officer or director was not entitled to indemnification under such agreements and applicable law. In addition, the Company is providing indemnification, advancement and/or reimbursement for costs related to (i) a formal order of investigation issued by the SEC on January 4, 2017 directed primarily at certain of the issues that the Special Committee reviewed and (ii) any related civil or administrative proceedings against the Company as well as officers currently or previously associated with the Company. During the three months ended March 31, 2019 , indemnification costs paid by the Company included $147 thousand incurred by the Company's General Counsel Emeritus John Grosvenor, who retired from that position effective April 15, 2019. Indemnification costs were paid on behalf of other executive officers and directors in lesser amounts for the three months ended March 31, 2019 . During the year ended December 31, 2018 , indemnification costs paid by the Company included $415 thousand incurred by the Company's General Counsel Emeritus John Grosvenor; $854 thousand incurred by director Halle J. Benett; $854 thousand incurred by director Jonah F. Schnel; and $854 thousand incurred by director Robert Sznewajs. Indemnification costs were paid on behalf of other executive officers and directors in lesser amounts for the year ended December 31, 2018 . During the year ended December 31, 2017, indemnification costs paid by the Company included $501 thousand incurred by the Company's General Counsel Emeritus John Grosvenor. Indemnification costs were paid on behalf of other executive officers and directors in lesser amounts for the year ended December 31, 2017. Company’s Sale of Shares to and Purchase of Shares from SECT . As reported in a Schedule 13G filed with the SEC on February 13, 2017, Evercore Trust Company, as trustee of the Banc of California Capital and Liquidity Enhancement Employee Compensation Trust (the SECT) (which was later succeeded as trustee by Newport Trust Company, N.A.), beneficially owned 2,500,000 shares of the Company’s voting common stock as of December 31, 2016, which Evercore Trust Company stated represented more than 5 percent of the total number of shares of the Company’s voting common stock outstanding as of that date. These shares were sold by the Company to the SECT on August 3, 2016 when the Company originally established the SECT. On December 28, 2017, in order to effectuate the early termination of the SECT, the Company purchased the 2,500,000 shares of voting common stock held by the SECT. As reported in a Schedule 13G amendment filed with the SEC on February 2, 2018, Evercore Trust Company reported that as of December 31, 2017, it no longer beneficially owned shares of the Company’s voting common stock. Sabal Loan. On September 5, 2017 John A. Bogler became the Chief Financial Officer of the Company and the Bank. Mr. Bogler is a founding member, and since 2015 and up until his employment with the Company, was a board member and Chief Financial Officer, of Sabal Capital Partners, LLC. Sabal Capital Partners, LLC is the sole owner of Sabal Opportunities Fund I, LLC, which in turn is the sole owner of Sabal TL1, LLC (together, Sabal). As of September 1, 2018, Mr. Bogler had completely divested his ownership in Sabal. Effective June 26, 2015, the Bank provided a $35.0 million committed revolving repurchase facility, which was increased to $40.0 million effective June 11, 2017, to Sabal TL1, LLC, with a maximum funding amount of $100.0 million in certain situations. On June 6, 2018, the revolving repurchase facility was extended for 90 days beyond its original maturity date of June 10, 2018. The repurchase facility's outstanding balance was $3.5 million before it was completely paid off in August 2018. The extension was not renewed and expired on September 10, 2018. Under the Sabal repurchase facility, commercial mortgage loans originated by Sabal were purchased from Sabal by the Bank, together with a simultaneous agreement by Sabal to repurchase the commercial mortgage loans from the Bank at a future date. The advances under the Sabal repurchase facility were secured by commercial mortgage loans that had a market value in excess of the balance of the advances under the facility. During the year ended December 31, 2018 , the largest aggregate amount of principal outstanding under the Sabal repurchase facility was $32.5 million . The Sabal repurchase facility was paid off during the year ended December 31, 2018 . Interest on the outstanding balance under the Sabal repurchase facility accrued at the six month LIBOR rate plus a margin. $210.4 million in principal and $370 thousand in interest was paid by Sabal on the facility to the Bank during the year ended December 31, 2018. Legion Affiliates . As reported in a Schedule 13D amendment filed with the SEC on May 23, 2017, Legion Partners Asset Management, LLC (Legion Partners), Legion Partners, L.P. I, Legion and its affiliates (collectively, the Legion Group) beneficially owned 2,938,679 shares of the Company’s voting common stock as of May 19, 2017, which the Legion Group reported represented 5.6 percent of the Company’s total shares outstanding. As reported in a Schedule 13D amendment filed with the SEC on April 26, 2018, the Legion Group beneficially owned 2,439,751 shares of the Company’s voting common stock as of that date, which the Legion Group reported represented 4.8 percent of the Company’s total shares outstanding. According to a Form 13-F filed with the SEC on February 14, 2019, the Legion Group no longer held any shares of the Company’s voting common stock as of December 31, 2018. Cooperation Agreement . On March 13, 2017, the Company entered into a cooperation agreement with the Legion Group (the Legion Group Cooperation Agreement). Under the terms of such agreement, among other things: • The Legion Group agreed to irrevocably withdraw its notice of director nomination and submission of a business proposal. • The Company agreed to conduct a search for two additional independent directors in collaboration with the Legion Group. In accordance with this provision, following a search initiated by the Company Board and (following entry into the Legion Group Cooperation Agreement) conducted in consultation with Legion Group, the Company Board appointed Mary A. Curran and Bonnie G. Hill as new independent directors, for terms that became effective on June 9, 2017 at the conclusion of the Company's 2017 Annual Meeting of Stockholders. Ms. Curran is serving as a Class I director, for a term to expire at the Company’s 2019 Annual Meeting of Stockholders. Dr. Hill's initial term as a director expired at the Company's 2018 Annual Meeting of Stockholders, at which she was re-elected for a one year term to expire at the Company’s 2019 Annual Meeting of Stockholders. Simultaneously with the effectiveness of their appointments to the Company Board, each of Ms. Curran and Dr. Hill was appointed as a director of the Bank. • From March 13, 2017 until June 10, 2017, the day after the Company’s 2017 Annual Meeting, the Legion Group agreed to vote all the shares of the Company's voting common stock that it beneficially owned (i) in favor of the Company’s slate of directors, (ii) against any stockholder’s nominations for directors not approved and recommended by the Board and against any proposals or resolutions to remove any director and (iii) in accordance with the Board’s recommendations on all other proposals of the Board set forth in the Company’s proxy statement. • The Legion Group agreed to certain standstill provisions that restricted the Legion Group and its affiliates, associates and representatives, from March 13, 2017 until June 10, 2017, from, among other things, acquiring additional voting securities of the Company that would result in the Legion Group having ownership or voting interest in 10 percent or more of the outstanding shares of voting common stock, engaging in proxy solicitations in an election contest, subjecting any shares to any voting arrangements except as expressly provided in the Legion Group Cooperation Agreement, making or being a proponent of a stockholder proposal, seeking to call a meeting of stockholders or solicit consents from stockholders, seeking to obtain representation on the Board except as otherwise expressly provided in the Legion Group Cooperation Agreement, seeking to remove any director from the Board, seeking to amend any provision of the governing documents of the Company, or proposing or participating in certain extraordinary corporate transactions involving the Company. • The Company agreed to reimburse the Legion Group up to $100 thousand for its legal fees and expenses incurred in connection with its investment in the Company. PL Capital Affiliates. As reported in a Schedule 13D amendment filed with the SEC on February 10, 2017, PL Capital Advisors, LLC (PL Capital Advisors) and certain of its affiliates (collectively, the PL Capital Group) owned 3,427,219 shares of the Company’s voting common stock as of February 7, 2017, which the PL Capital Group reported represented 6.9 percent of the Company’s total shares outstanding. Cooperation Agreement . On February 7, 2017, Richard J. Lashley, a co-founder of PL Capital Advisors, LLC, was appointed to the Boards of Directors of the Company and the Bank, which appointments became effective February 16, 2017. Mr. Lashley was appointed as a Class I director of the Company, for a term that will expire at the Company’s 2019 Annual Meeting of Stockholders. In connection with the appointment of Mr. Lashley to the Boards, on February 8, 2017, the PL Capital Group and Mr. Lashley entered into a cooperation agreement with the Company (PL Capital Cooperation Agreement), in which PL Capital Group agreed, among other matters: • From February 8, 2017 until June 10, 2017 (PL Capital Restricted Period), the PL Capital Group agreed to vote all shares of Common Stock that it beneficially owned (i) in favor of the Company’s slate of directors, (ii) against any stockholder’s nominations for directors not approved and recommended by the Company’s Board and against any proposals or resolutions to remove any director and (iii) in accordance with the recommendations by the Company’s Board on all other proposals of the Company’s Board set forth in the Company’s proxy statement. • In addition, during the PL Capital Restricted Period, the PL Capital Group agreed to certain standstill provisions that restricted the PL Capital Group and its affiliates, associates and representatives, during the PL Capital Restricted Period, from, among other things, acquiring additional voting securities of the Company that would result in the PL Capital Group having ownership or voting interest in 10 percent or more of the outstanding shares of voting common stock, engaging in proxy solicitations in an election contest, subjecting any shares to any voting arrangements except as expressly provided in the PL Capital Cooperation Agreement, making or being a proponent of a stockholder proposal, seeking to call a meeting of stockholders or solicit consents from stockholders, seeking to obtain representation on the Company’s Board except as otherwise expressly provided in the PL Capital Cooperation Agreement, seeking to remove any director from the Company’s Board, seeking to amend any provision of the governing documents of the Company, or proposing or participating in certain extraordinary corporate transactions involving the Company. • Pursuant to the PL Capital Cooperation Agreement, during the three months ended March 31, 2017, the Company reimbursed PL Capital Group $150 thousand for a portion of its legal fees and expenses incurred in connection with its investment in the Company. Transactions with Former Related Parties In addition to the transactions described above with former related parties, the Company and the Bank have engaged in transactions described below with the Company’s then (now former) directors, executive officers, and beneficial owners of more than 5 percent of the outstanding shares of the Company’s voting common stock and certain persons related to them. Indemnification for Costs of Counsel for Former Executive Officers and Former Directors in Connection with Special Committee Investigation, SEC Investigation and Related Matters. On November 3, 2016, in connection with the investigation by the Special Committee of the Company's Board of Directors, the Company Board authorized and directed the Company to provide indemnification, advancement and/or reimbursement for the costs of separate independent counsel retained by any then-current officer or director, in their individual capacity, with respect to matters related to the investigation, and to advise them on their rights and obligations with respect to the investigation. At the direction of the Company Board, this indemnification, advancement and/or reimbursement is, to the extent applicable, subject to the indemnification agreement that each officer and director previously entered into with the Company, which includes an undertaking to repay any expenses advanced if it is ultimately determined that the officer or director was not entitled to indemnification under such agreements and applicable law. In addition, the Company is also providing indemnification, advancement and/or reimbursement for costs related to (i) a formal order of investigation issued by the SEC on January 4, 2017 directed primarily at certain of the issues that the Special Committee reviewed and (ii) any related civil or administrative proceedings against the Company as well as officers currently or previously associated with the Company. During the three months ended March 31, 2019 , indemnification costs paid by the Company included $2.2 million incurred by the Company’s former Chair, President and Chief Executive Officer Steven A. Sugarman; $555 thousand jointly incurred by the Company’s former Interim Chief Financial Officer and Chief Strategy Officer J. Francisco A. Turner and the Company’s former Chief Financial Officer James J. McKinney; Indemnification costs were paid on behalf of other former executive officers and other former directors in lesser amounts for the three months ended March 31, 2019 . During the year ended December 31, 2018, indemnification costs paid by the Company included $8.5 million incurred by the Company’s former Chair, President and Chief Executive Officer Steven A. Sugarman; $497 thousand incurred by the Bank’s former Management Vice Chair Jeffrey T. Seabold; $400 thousand jointly incurred by the Company’s former Interim Chief Financial Officer and Chief Strategy Officer J. Francisco A. Turner and the Company’s former Chief Financial Officer James J. McKinney; $292 thousand incurred by the Bank’s former director Cynthia Abercrombie; and $854 thousand incurred by the Company’s former director Jeffrey Karish. Indemnification costs were paid on behalf of other former executive officers and other former directors in lesser amounts for the year ended December 31, 2018. During the year ended December 31, 2017 (excluding indemnification costs paid in January 2017), indemnification costs paid by the Company included $3.0 million incurred by Mr. Sugarman; $1.4 million incurred by Mr. Seabold; $631 thousand jointly incurred by the Company’s former Interim Chief Financial Officer and Chief Strategy Officer J. Francisco A. Turner and the Company’s former Chief Financial Officer James J. McKinney; and $509 thousand incurred by the Company’s former director Chad Brownstein. Indemnification costs were paid on behalf of other former executive officers and other former directors in lesser amounts for the year ended December 31, 2017 (excluding fees paid in January 2017). Settlement Agreement. On September 5, 2017, Jeffrey T. Seabold, the Bank’s former Management Vice Chair, submitted a notice of termination of employment pursuant to his employment agreement with the Bank and, that same day, filed a complaint in the Superior Court of the State of California, County of Los Angeles, against the Company and the Bank and multiple unnamed defendants asserting claims for breach of contract, wrongful termination, retaliation and unfair business practices. On January 19, 2018, the parties reached a settlement in principle through mediation and a final settlement agreement was entered into by the Company, the Bank and Mr. Seabold on February 14, 2018 (the Settlement Agreement). Under the Settlement Agreement, which provides for a mutual release of claims and the dismissal of Mr. Seabold’s complaint with prejudice, Mr. Seabold received lump sum cash payments from the Company and the Bank aggregating $4.3 million , less applicable withholdings for the portions of such payments representing employee compensation. Included within this amount are cash payments totaling $576 thousand representing a benefit with respect to Mr. Seabold's unvested stock options and restricted stock awards. Mr. Seabold also received a cash payment of $38 thousand as reimbursement for his premiums for health care coverage for the period October 1, 2017 through March 2019. In addition, in accordance with the Settlement Agreement the Bank paid $650 thousand of attorneys’ fees incurred by Mr. Seabold in connection with his lawsuit and the Settlement Agreement. All the cash payments to Mr. Seabold under the Settlement Agreement were made during the three months ended March 31, 2018. The Settlement Agreement contains certain standstill provisions that, prior to December 31, 2018, generally restricted Mr. Seabold and his affiliates from, among other things, acquiring beneficial ownership of any shares of the Company’s common stock or common stock equivalents to the extent this would result in Mr. Seabold beneficially owning in excess of 4.99 percent of the total number of shares of common stock outstanding, soliciting proxies in opposition to any matter not recommended by the Company’s Board of Directors or in favor of any matter not approved by the Company’s Board of Directors or initiating any stockholder proposal. Banc of California Stadium Naming Rights and Sponsorship and Los Angeles Football Club Loans. Effective August 8, 2016, the Bank provided $40.3 million out of a $145.0 million committed construction line of credit (the Stadco Loan) to LAFC Stadium Co, LLC (Stadco) for the construction of a soccer-specific stadium for the LAFC in Los Angeles, California as well as to fund the interest and fees that become due under the Stadco Loan. LAFC is a Major League Soccer expansion franchise that debuted at the beginning of 2018. Also effective August 8, 2016, the Bank provided $9.7 million out of a $35.0 million committed senior secured line of credit (the Team Loan) to LAFC Sports, LLC (Team) to fund distributions to LAFC Partners, LLLP (Holdco) that will be used for stadium construction, funding interest and fees that become due under such Team Loan and to pay all other fees, costs and expenses payable by the Team in connection with project costs related to the stadium construction. All of the outstanding equity interests in Stadco and Team are held by Holdco, and Holdco serves as sole guarantor of the Team Loan described above. At the time the Stadco Loan and Team Loan were underwritten, minority limited partnership interests in Holdco were held by, among others: (i) Jason Sugarman, who is the brother of the Company’s and the Bank’s then- (now former) Chairman, President and Chief Executive Officer, Steven A. Sugarman; and (ii) Jason Sugarman’s father-in-law, who served during 2016 (and may continue to serve) as Executive Chairman and a member of Holdco’s board of directors, which was (and may continue to be) appointed by Holdco’s general partner and primarily functions in an advisory capacity. The foregoing statements are based primarily on information provided to the Company by Holdco through its legal counsel. On August 30, 2018, all outstanding advances under Stadco Loan were paid off and the loan was closed. The Bank collected $66 thousand and $295 thousand , respectively, in unused loan fees during the years ended December 31, 2018 and 2017. Interest on the outstanding balance under the Stadco Loan accrues at LIBOR plus a margin. During the years ended December 31, 2018 and 2017, $1.1 million and $325 thousand interest, respectively, was paid by Stadco to the Bank on the Stadco Loan. As of March 31, 2019 and December 31, 2018 , there were $9.7 million and $9.7 million outstanding advances, respectively, by the Bank under Team Loan. The Bank collected $0 and $22 thousand , respectively, in unused loan fees during the three months ended March 31, 2019 and year ended December 31, 2018 . Interest on the outstanding balance under the Team Loan accrues at LIBOR plus a margin. During the three months ended March 31, 2019 and year ended December 31, 2018 , $158 thousand and $471 thousand interest, respectively, was paid by Team to the Bank on the Team Loan. Team obtained a corporate credit card with a $100 thousand line of credit from a third party unaffiliated with the Bank. Effective November 24, 2017, the Bank provided a guaranty for the card by obtaining a standby letter of credit issued by another institution unaffiliated with the Bank in the amount of $100 thousand for the benefit of the issuer of the credit card. This letter of credit had never been drawn upon and was terminated during the quarter ended June 30, 2018. Following the closing of the Stadco Loan and the Term Loan, the Bank on August 22, 2016 reached agreement with the Team concerning, among other things, the Bank’s right to name the stadium to be operated by Stadco as “Banc of California Stadium.” The August 22, 2016 agreement, which contemplated the negotiation and execution of more detailed definitive agreements between the Bank, on the one hand, and Stadco and the Team on the other hand (LAFC Transaction), also included a sponsorship relationship between the Bank and the Team with an initial term ending on the completion date of LAFC’s 15th full Major League Soccer (MLS) season, and the Bank having a right of first offer to extend the term for an additional 10 years (LAFC Term). On February 28, 2017, the Bank executed more detailed definitive agreements with LAFC and Stadco relating to the LAFC Transaction, which are subject to MLS rules and/or approval (the LAFC Agreements). The LAFC Agreements provide that, during the LAFC Term, the Bank has the exclusive right to name the Banc of California Stadium and has the right to be the exclusive provider of financial services to (and the exclusive financial services sponsor of) the Team and Stadco. In connection with its right to name the Banc of California Stadium, the Bank will receive, among other rights, signage (including prominent exterior signage) and related branding rights throughout the exterior and interior of the Banc of California Stadium facility (including exclusive branding rights within certain designated areas and venues within the facility), receives the right to locate a Bank branch within the Banc of California Stadium facility, and the exclusive right to install and operate ATMs in the Banc of California Stadium facility, receives the exclusive right to process payments and provide other financial services (with certain exceptions) throughout the facility. In addition, the Bank receives suite access for LAFC and certain other events held at the Banc of California Stadium and receives certain hospitality, event, media and other rights ancillary to its naming rights relating to the Banc of California Stadium and its sponsorship rights relating to the Team. In conjunction with the LAFC Agreements, the Company decreased its other planned marketing and sponsorship expenses. In exchange for the Bank’s rights as set forth in the LAFC Agreements, the Bank (i) paid the Team $10.0 million on March 31, 2017 and (ii) has agreed to pay the following annual aggregate amounts: for the Team’s 2018 MLS season, $5.3 million ; for 2019, $5.4 million ; for 2020, $5.5 million ; for 2021, $5.6 million ; for 2022, $5.7 million ; for 2023, $5.8 million ; for 2024, $5.9 million ; for 2025, $6.0 million ; for 2026, $6.1 million ; for 2027, $6.2 million ; for 2028, $6.3 million ; for 2029, $6.4 million ; for 2030, $6.5 million ; for 2031, $6.6 million ; and for 2032, $6.7 million . The advertising benefits of such rights are amortized on a straight-line basis and recorded as advertising expense beginning in 2018. During the three months ended March 31, 2019 , the Bank paid $1.4 million for the Team's 2019 MLS season and the related advertising and promotion expense recorded was $1.7 million . As of March 31, 2019 , the Bank has paid $16.7 million of the $100.0 million commitment. The prepaid commitment balance, net of amortization, was $8.4 million as of March 31, 2019 , which was recognized as a prepaid asset and included in Other Assets in the Consolidated Statements of Financial Condition. As of March 31, 2019 and December 31, 2018 , the various entities affiliated with LAFC held $22.4 million and $19.4 million , respectively, of deposits at the Bank. Legal Fees and Other Matters. During July 2017, the Company and the Bank became aware that the former Chair, President and Chief Executive Officer of the Company and the Bank, Steven A. Sugarman, became of counsel to Michelman & Robinson, LLP, a law firm that previously provided legal services to the Bank. For legal services that were performed for the Bank over a period of more than four months, the Bank paid Michelman & Robinson, LLP approximately $330 thousand in fees during the three months ended March 31, 2017. No legal services were provided and $0 was paid to Michelman & Robinson, LLP from April 1, 2017 to March 31, 2019 . Michelman & Robinson, LLP previously had three outstanding letters of credit with the Bank,which were issued under a line of credit that was originally extended to Michelman & Robinson, LLP prior to 2008. All three letters of credit were canceled in February 2018, and none were drawn upon as of December 31, 2017 or subsequent to that date. Michelman & Robinson, LLP elected to pay in full all outstanding borrowings under the line of credit in June 2017 and, thereafter, the line of credit was terminated. During the three months ended March 31, 2017, the Bank reimbursed Michelman & Robinson, LLP $100 thousand in connection with a matter concerning funds wired by a third party to a deposit account Michelman & Robinson, LLP held at the Bank.

LITIGATION

LITIGATION	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
LITIGATION	LITIGATION From time to time we are involved as plaintiff or defendant in various legal actions arising in the normal course of business. In accordance with applicable accounting guidance, the Company establishes an accrued liability when those matters present loss contingencies that are both probable and estimable. The Company continues to monitor the matter for further developments that could affect the amount of the accrued liability that has been previously established. As of March 31, 2019 , the Company accrued $682 thousand for various litigation filed against the Company and the Bank. The Company was named as a defendant in several complaints filed in the United States District Court for the Central District of California in January 2017 alleging violations of sections 10(b) and 20(a) of the Securities Exchange Act of 1934. The complaints were brought as purported class actions on behalf of stockholders who purchased shares of the Company’s common stock between varying dates, inclusive of August 7, 2015 through January 23, 2017. Those actions were consolidated, a lead plaintiff was appointed, and the lead plaintiff filed a Consolidated Amended Complaint on May 31, 2017. The defendants moved to dismiss the Consolidated Amended Complaint. On September 18, 2017, the district court granted in part and denied in part Defendants’ motions to dismiss. Specifically, the court denied the defendants’ motions as to the Company’s April 15, 2016 Proxy Statement which listed the positions held by Steven A. Sugarman (the Company’s then (now former) Chairman, President and Chief Executive Officer) with COR Securities Holdings Inc., COR Clearing LLC, and COR Capital LLC while omitting their alleged connections with Jason Galanis. On May 31, 2018, the court certified a class of shareholders who purchased Company stock between April 15, 2016 and January 20, 2017. Trial is currently set for February 18, 2020. The Company believes that the action is without merit and intends to vigorously contest it.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS The Company evaluated events from the date of the consolidated financial statements on March 31, 2019 through the issuance of these consolidated financial statements included in this Quarterly Report on Form 10-Q and determined that no significant events were identified requiring recognition or disclosure in the consolidated financial statements.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation: The accompanying unaudited interim consolidated financial statements have been prepared pursuant to Article 10 of SEC Regulation S-X and other SEC rules and regulations for reporting on the Quarterly Report on Form 10-Q. Accordingly, certain disclosures required by U.S. generally accepted accounting principles (GAAP) are not included herein. These interim statements should be read in conjunction with the consolidated financial statements and notes included in the Annual Report on Form 10-K for the year ended December 31, 2018 filed by the Company with the SEC. The December 31, 2018 consolidated statements of financial condition presented herein has been derived from the audited financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC, but does not include all of the disclosures required by GAAP for complete financial statements.
Reclassification	In the opinion of management of the Company, the accompanying unaudited interim consolidated financial statements reflect all of the adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the consolidated financial condition and consolidated results of operations as of the dates and for the periods presented.
Principles of Consolidation	Principles of Consolidation: The accompanying unaudited consolidated financial statements include the accounts of the Company and its consolidated subsidiaries as of March 31, 2019 and December 31, 2018 and for the three months ended March 31, 2019 and 2018 . Significant intercompany accounts and transactions have been eliminated in consolidation. Unless the context requires otherwise, all references to the Company include its then wholly owned subsidiaries.
Accounting Pronouncements	Adopted Accounting Pronouncements: During the three months ended March 31, 2019 , the following pronouncements applicable to the Company were adopted: In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (ASU) 2016-02 Topic 842, “Leases” which increases transparency and comparability among organizations by requiring the recognition of right of use (ROU) assets and lease liabilities on the balance sheet. Most prominent among the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted Topic 842 and related updates effective January 1, 2019 and used the effective date as the date of initial application, and therefore, periods prior to January 1, 2019 were not restated. The Company elected the package of practical expedients, which permits us not to reassess prior conclusions about lease identifications, lease classification and initial direct costs under the new standard. The Company did not elect to apply the hindsight practical expedient pertaining to using hindsight knowledge as of the effective date when determining lease terms and impairment. The Company also has elected the short-term lease recognition exemption (leases with terms 12 months or less) for all leases that qualify, and thus will not recognize ROU assets or lease liabilities for those leases. In addition, the Company elected the practical expedient to not separate lease and non-lease components for all of our leases. Upon adoption, the Company recognized on its balance sheet ROU assets of approximately $23.3 million (inclusive of an adjustment to remove the Company's existing deferred rent liability of approximately $1.4 million ) with a corresponding operating lease liability of approximately $24.7 million . The standard did not have an impact on our consolidated statements of operations. In addition, the Company's accounting for finance leases remained substantially unchanged. Significant Accounting Policies: The accounting and reporting policies of the Company are based upon GAAP and conform to predominant practices within the banking industry. The Company has not made any significant changes in its critical accounting policies from those disclosed in its Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC, except for the accounting for leases as described below. Leases. The Company determines if an arrangement is a lease at inception. The Company’s operating lease agreements are primarily for real estate space and are included within right of use (ROU) assets and lease liabilities on the consolidated balance sheets. The ROU asset is based on the operating lease liabilities adjusted for any prepaid or deferred rent. The Company has elected not to recognize on its consolidated balance sheet leases with terms of one-year or less. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, the Company uses its incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment, at lease commencement date in determining the present value of lease payments. Many of the Company’s lessee agreements include options to extend the lease, which the Company does not include in its minimum lease terms unless they are reasonably certain to be exercised. The Company elected the practical expedient to combine its lease and related nonlease components for the Company’s building leases. Rental expense for lease payments related to operating leases is recognized on a straight-line basis over the lease term
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements: The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and disclosures provided, and actual results could differ. The allowance for loan and lease losses (ALLL), reserve for loss on repurchased loans, reserve for unfunded loan commitments, realization of deferred tax assets, the valuation of goodwill and other intangible assets, mortgage banking derivatives, Hypothetical Liquidation at Book Value (HLBV) of investments in alternative energy partnerships, and the fair value measurement of financial instruments are particularly subject to change and such change could have a material effect on the consolidated financial statements.
Discontinued Operations	Discontinued Operations: During the three months ended March 31, 2017, the Company completed the sale of its Banc Home Loans division, which largely represented the Company's Mortgage Banking segment. In accordance with Accounting Standards Codification (ASC) 205-20, the Company determined that the sale of the Banc Home Loans division and certain other mortgage banking related assets and liabilities that would be sold or settled separately within one year met the criteria to be classified as a discontinued operation and the related operating results and financial condition have been presented as discontinued operations on the consolidated financial statements. See Note 2 for additional information. Unless otherwise indicated, information included in these notes to the consolidated financial statements is presented on a consolidated operations basis, which includes results from both continuing and discontinued operations, as of December 31, 2018 and for the three months ended March 31, 2018 .
Restructuring Expense	Restructuring Expense: During the first quarter March 31, 2019 , the Company continued to implement its strategic objective to de-emphasize the production of low margin loan products through its exit from the third-party mortgage origination ("TPMO") and brokered single family lending business.

FAIR VALUES OF FINANCIAL INST_2

FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Assets Measured on a Recurring Basis	The following table presents the Company’s financial assets and liabilities measured at fair value on a recurring basis as of the dates indicated: Fair Value Measurement Level ($ in thousands) Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2019 Assets Securities available-for-sale: SBA loan pools securities $ 820 $ — $ 820 $ — U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 434,461 — 434,461 — Non-agency residential mortgage-backed securities 331 — 331 — Collateralized loan obligations 1,035,691 — 1,035,691 — Loans held-for-sale, carried at fair value 25,191 — 2,122 23,069 Derivative assets: Interest rate swaps and caps (1) 2,309 — 2,309 — Foreign exchange contracts (1) 57 — 57 — Liabilities Derivative liabilities: Interest rate swaps and caps (2) 2,497 — 2,497 — Foreign exchange contracts (2) 32 — 32 — December 31, 2018 Assets Securities available-for-sale: SBA loan pools securities $ 910 $ — $ 910 $ — U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 437,442 — 437,442 — Non-agency residential mortgage-backed securities 427 — 427 — Non-agency commercial mortgage-backed securities 132,199 — 132,199 — Collateralized loan obligations 1,421,522 — 1,421,522 — Loans held-for-sale, carried at fair value (3) 27,180 — 2,140 25,040 Derivative assets: Interest rate swaps and caps (1) 1,534 — 1,534 — Liabilities Derivative liabilities: Interest rate swaps and caps (2) 1,600 — 1,600 — (1) Included in Other Assets in the Consolidated Statements of Financial Condition. (2) Included in Accrued Expenses and Other Liabilities in the Consolidated Statements of Financial Condition. (3) Includes loans held-for-sale carried at fair value of $19.5 million ( $2.1 million at Level 2 and $17.4 million at Level 3) of discontinued operations, which are included in Assets of Discontinued Operations in the Consolidated Statements of Financial Condition.
Fair Value Liabilities Measured on a Recurring Basis	The following table presents the Company’s financial assets and liabilities measured at fair value on a recurring basis as of the dates indicated: Fair Value Measurement Level ($ in thousands) Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2019 Assets Securities available-for-sale: SBA loan pools securities $ 820 $ — $ 820 $ — U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 434,461 — 434,461 — Non-agency residential mortgage-backed securities 331 — 331 — Collateralized loan obligations 1,035,691 — 1,035,691 — Loans held-for-sale, carried at fair value 25,191 — 2,122 23,069 Derivative assets: Interest rate swaps and caps (1) 2,309 — 2,309 — Foreign exchange contracts (1) 57 — 57 — Liabilities Derivative liabilities: Interest rate swaps and caps (2) 2,497 — 2,497 — Foreign exchange contracts (2) 32 — 32 — December 31, 2018 Assets Securities available-for-sale: SBA loan pools securities $ 910 $ — $ 910 $ — U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 437,442 — 437,442 — Non-agency residential mortgage-backed securities 427 — 427 — Non-agency commercial mortgage-backed securities 132,199 — 132,199 — Collateralized loan obligations 1,421,522 — 1,421,522 — Loans held-for-sale, carried at fair value (3) 27,180 — 2,140 25,040 Derivative assets: Interest rate swaps and caps (1) 1,534 — 1,534 — Liabilities Derivative liabilities: Interest rate swaps and caps (2) 1,600 — 1,600 — (1) Included in Other Assets in the Consolidated Statements of Financial Condition. (2) Included in Accrued Expenses and Other Liabilities in the Consolidated Statements of Financial Condition. (3) Includes loans held-for-sale carried at fair value of $19.5 million ( $2.1 million at Level 2 and $17.4 million at Level 3) of discontinued operations, which are included in Assets of Discontinued Operations in the Consolidated Statements of Financial Condition.
Reconciliation of Assets Measured at Fair Value on Recurring Basis	The following table presents a reconciliation of assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3), on a consolidated operations basis, for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Loans repurchased from GNMA Loan Pools (1) Balance at beginning of period $ 25,040 $ 98,940 Total gains or losses (realized/unrealized): Included in earnings—fair value adjustment 3 (6 ) Additions — 24,620 Sales, settlements, and other (1,974 ) (80,592 ) Balance at end of period $ 23,069 $ 42,962 (1) Includes loans repurchased from GNMA Loan Pools of discontinued operations, which is included in Assets of Discontinued Operations in the Consolidated Statements of Financial Condition, of $17.3 million and $32.3 million , respectively, for the three months ended March 31, 2019 and 2018 in balance at beginning of period, and zero and $24.0 million , respectively, for the three months ended March 31, 2019 and 2018 in balance at end of period.
Fair value option of certain assets	The following table presents changes in fair value related to initial measurement and subsequent changes in fair value included in earnings for these assets and liabilities measured at fair value for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Net gains (losses) from fair value changes Net gain (loss) on sale of loans (continuing operations) $ 1 $ (15 ) Net revenue on mortgage banking activities (discontinued operations) — 8 The following table presents the fair value and aggregate principal balance of certain assets, on a consolidated operations basis, under the fair value option: March 31, 2019 December 31, 2018 ($ in thousands) Fair Value Unpaid Principal Balance Difference Fair Value Unpaid Principal Balance Difference Loans held-for-sale, carried at fair value in continuing operations: Total loans $ 25,191 $ 25,932 $ (741 ) $ 7,690 $ 7,906 $ (216 ) Non-accrual loans (1) 9,217 9,350 (133 ) 2,427 2,538 (111 ) Loans held-for-sale, carried at fair value in discontinued operations: Total loans $ — $ — $ — $ 19,490 $ 20,027 $ (537 ) Non-accrual loans (2) — — — 8,430 8,496 (66 ) (1) Includes loans guaranteed by the U.S. government of $8.0 million and $1.6 million , respectively, at March 31, 2019 and December 31, 2018 . (2) Includes loans guaranteed by the U.S. government of zero and $7.6 million , respectively, at March 31, 2019 and December 31, 2018 .
Schedule of Assets and Liabilities Measured on Non-recurring Basis	The following table presents the Company’s financial assets and liabilities measured at fair value on a non-recurring basis as of the dates indicated: Fair Value Measurement Level ($ in thousands) Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2019 Assets Impaired loans: Single family residential mortgage $ 674 $ — $ — $ 674 SBA 765 — — 765 December 31, 2018 Assets Impaired loans: SBA $ 226 — — $ 226
Schedule of Gains and (Losses) Recognized on Assets Measured at Fair Value on Non-recurring Basis	The following table presents the gains (losses) recognized on assets measured at fair value on a non-recurring basis for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Impaired loans: Single family residential mortgage $ (490 ) $ (115 ) Commercial and industrial — (60 ) SBA (54 ) (381 ) Other consumer (88 ) (141 )
Carrying Amounts and Estimated Fair Values of Financial Instruments	nts The following table presents the carrying amounts and estimated fair values of financial assets and liabilities, on a consolidated operations basis, as of the dates indicated: Carrying Amount Fair Value Measurement Level ($ in thousands) Level 1 Level 2 Level 3 Total March 31, 2019 Financial assets Cash and cash equivalents $ 304,705 $ 304,705 $ — $ — $ 304,705 Securities available-for-sale 1,471,303 — 1,471,303 — 1,471,303 Federal Home Loan Bank and other bank stock 55,794 — 55,794 — 55,794 Loans held-for-sale 25,191 — 2,122 23,069 25,191 Loans and leases receivable, net of ALLL 7,493,315 — — 7,360,071 7,360,071 Accrued interest receivable 36,468 36,468 — — 36,468 Derivative assets 2,366 — 2,366 — 2,366 Financial liabilities Deposits 7,724,932 — — 7,536,887 7,536,887 Advances from Federal Home Loan Bank 935,000 — 938,536 — 938,536 Long term debt 173,203 — 173,483 — 173,483 Derivative liabilities 2,529 — 2,529 — 2,529 Accrued interest payable 16,726 16,726 — — 16,726 December 31, 2018 Financial assets Cash and cash equivalents $ 391,592 $ 391,592 $ — $ — $ 391,592 Securities available-for-sale 1,992,500 — 1,992,500 — 1,992,500 Federal Home Loan Bank and other bank stock 68,094 — 68,094 — 68,094 Loans held-for-sale (1) 27,606 — 2,566 25,040 27,606 Loans and leases receivable, net of allowance 7,638,681 — — 7,513,910 7,513,910 Accrued interest receivable 38,807 38,807 — — 38,807 Derivative assets 1,534 — 1,534 — 1,534 Financial liabilities Deposits 7,916,644 — — 7,689,324 7,689,324 Advances from Federal Home Loan Bank 1,520,000 — 1,517,761 — 1,517,761 Long-term debt 173,174 — 174,059 — 174,059 Derivative liabilities 1,600 — 1,600 — 1,600 Accrued interest payable 13,253 13,253 — — 13,253 (1) Includes loans held-for-sale carried at fair value of $19.5 million ( $2.1 million at Level 2 and $17.4 million at Level 3) of discontinued operations.

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Fair Value of Available-for-Sale Investment Securities	The following table presents the amortized cost and fair value of the investment securities portfolio as of the dates indicated: ($ in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value March 31, 2019 Securities available-for-sale: SBA loan pool securities $ 831 $ — $ (11 ) $ 820 U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 448,956 18 (14,513 ) 434,461 Non-agency residential mortgage-backed securities 319 12 — 331 Collateralized loan obligations 1,046,845 132 (11,286 ) 1,035,691 Total securities available-for-sale $ 1,496,951 $ 162 $ (25,810 ) $ 1,471,303 December 31, 2018 Securities available-for-sale: SBA loan pool securities $ 911 $ — $ (1 ) $ 910 U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 461,987 — (24,545 ) 437,442 Non-agency residential mortgage-backed securities 418 9 — 427 Non-agency commercial mortgage-backed securities 132,199 — — 132,199 Collateralized loan obligations 1,431,171 141 (9,790 ) 1,421,522 Total securities available-for-sale $ 2,026,686 $ 150 $ (34,336 ) $ 1,992,500
Proceeds from Sales and Calls of Securities and Associated Gross Gains and Losses	The following table presents proceeds from sales and calls of securities available-for-sale and the associated gross gains and losses realized through earnings upon the sales and calls of securities available-for-sale for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Gross realized gains on sales and calls of securities available-for-sale $ 208 $ 5,241 Gross realized losses on sales and calls of securities available-for-sale — — Net realized gains on sales and calls of securities available-for-sale $ 208 $ 5,241 Proceeds from sales and calls of securities available-for-sale $ 521,684 $ 287,517
Summary of Investment Securities with Unrealized Losses	The following table summarizes the investment securities with unrealized losses by security type and length of time in a continuous unrealized loss position as of the dates indicated: Less Than 12 Months 12 Months or Longer Total ($ in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses March 31, 2019 Securities available-for-sale: SBA loan pool securities $ 820 $ (11 ) $ — $ — $ 820 $ (11 ) U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 200,351 (6,653 ) 230,807 (7,860 ) 431,158 (14,513 ) Non-agency residential mortgage-backed securities 15 — 7 — 22 — Collateralized loan obligations 739,508 (10,437 ) 195,301 (849 ) 934,809 (11,286 ) Total securities available-for-sale $ 940,694 $ (17,101 ) $ 426,115 $ (8,709 ) $ 1,366,809 $ (25,810 ) December 31, 2018 Securities available-for-sale: SBA loan pool securities $ — $ — $ 910 $ (1 ) $ 910 $ (1 ) U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 13,494 (133 ) 423,916 (24,412 ) 437,410 (24,545 ) Non-agency residential mortgage-backed securities 90 — 16 — 106 — Collateralized loan obligations 1,364,317 (9,480 ) 32,790 (310 ) 1,397,107 (9,790 ) Total securities available-for-sale $ 1,377,901 $ (9,613 ) $ 457,632 $ (24,723 ) $ 1,835,533 $ (34,336 )
Composition, Repricing and Yield Information of Investment Securities Portfolio	The following table presents the composition and the repricing and yield information of the investment securities portfolio as of March 31, 2019: One year or less More than One Year through Five Years More than Five Years through Ten Years More than Ten Years Total ($ in thousands) Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Fair Value Weighted-Average Yield Securities available-for-sale: SBA loan pool securities $ — — % $ — — % $ — — % $ 820 3.06 % $ 820 3.06 % U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities 267 2.71 % 3,317 3.16 % — — % 430,877 3.06 % 434,461 3.03 % Non-agency residential mortgage-backed securities 76 3.96 % — — % — — % 255 5.57 % 331 5.20 % Collateralized loan obligations 1,035,691 4.25 % — — % — — % — — % 1,035,691 4.25 % Total securities available-for-sale $ 1,036,034 4.25 % $ 3,317 3.16 % $ — — % $ 431,952 3.03 % $ 1,471,303 3.89 %

LOANS AND LEASES AND ALLOWANC_2

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Loans and Leases Receivable	The following table presents the balances in the Company’s non-traditional mortgage (NTM) and traditional loans and leases portfolios as of the dates indicated: ($ in thousands) NTM Loans Traditional Loans and Leases Total Loans and Leases Receivable March 31, 2019 Commercial: Commercial and industrial $ — $ 1,907,102 $ 1,907,102 Commercial real estate — 865,521 865,521 Multifamily — 2,332,527 2,332,527 SBA — 74,998 74,998 Construction — 211,549 211,549 Consumer: Single family residential mortgage 788,054 1,314,640 2,102,694 Other consumer 2,351 60,458 62,809 Total loans and leases (1) $ 790,405 $ 6,766,795 $ 7,557,200 Percentage to total loans and leases 10.5 % 89.5 % 100.0 % Allowance for loan and lease losses (63,885 ) Loans and leases receivable, net $ 7,493,315 December 31, 2018 Commercial: Commercial and industrial $ — $ 1,944,142 $ 1,944,142 Commercial real estate — 867,013 867,013 Multifamily — 2,241,246 2,241,246 SBA — 68,741 68,741 Construction — 203,976 203,976 Consumer: Single family residential mortgage 824,318 1,481,172 2,305,490 Other consumer 2,413 67,852 70,265 Total loans and leases (1) $ 826,731 $ 6,874,142 $ 7,700,873 Percentage to total loans and leases 10.7 % 89.3 % 100.0 % Allowance for loan and lease losses (62,192 ) Loans and leases receivable, net $ 7,638,681 (1) Total loans and leases includes deferred loan origination costs/(fees) and premiums/(discounts), net of $16.8 million and $17.7 million , respectively, at March 31, 2019 and December 31, 2018 .
Non Traditional Mortgages Portfolio	The following table presents the composition of the NTM portfolio as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Count Amount Percent Count Amount Percent Green Loans (HELOC) - first liens 83 $ 64,444 8.2 % 88 $ 67,729 8.2 % Interest-only - first liens 477 720,116 91.1 % 519 753,061 91.1 % Negative amortization 11 3,494 0.4 % 11 3,528 0.4 % Total NTM - first liens 571 788,054 99.7 % 618 824,318 99.7 % Green Loans (HELOC) - second liens 8 2,351 0.3 % 10 2,413 0.3 % Total NTM - second liens 8 2,351 0.3 % 10 2,413 0.3 % Total NTM loans 579 $ 790,405 100.0 % 628 $ 826,731 100.0 % Total loans and leases $ 7,557,200 $ 7,700,873 % of total NTM loans to total loans and leases 10.5 % 10.7 %
Allowance for Loan and Lease Losses and Recorded Investment, Excluding Accrued Interest, in Loans	The following table presents a summary of activity in the ALLL for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Balance at beginning of period $ 62,192 $ 49,333 Loans and leases charged off (1,063 ) (14,639 ) Recoveries of loans and leases previously charged off 244 570 Provision for loan and lease losses 2,512 19,499 Balance at end of period $ 63,885 $ 54,763 The following table presents the activity and balance in the ALLL and the recorded investment, excluding accrued interest, in loans and leases based on the impairment methodology as of or for the three months ended March 31, 2019 : ($ in thousands) Commercial and Industrial Commercial Real Estate Multifamily SBA Construction Lease Financing Single Family Residential Mortgage Other Consumer Total ALLL: Balance at December 31, 2018 $ 18,191 $ 6,674 $ 17,970 $ 1,827 $ 3,461 $ — $ 13,128 $ 941 $ 62,192 Charge-offs (93 ) — — (356 ) — — (526 ) (88 ) (1,063 ) Recoveries 33 — — 41 — 3 150 17 244 Provision (reversal) 762 164 928 1,545 (8 ) (3 ) (610 ) (266 ) 2,512 Balance at March 31, 2019 $ 18,893 $ 6,838 $ 18,898 $ 3,057 $ 3,453 $ — $ 12,142 $ 604 $ 63,885 Individually evaluated for impairment $ 48 $ — $ — $ 1,634 $ — $ — $ 230 $ 33 $ 1,945 Collectively evaluated for impairment 18,845 6,838 18,898 1,423 3,453 — 11,912 571 61,940 Total ending ALLL balance $ 18,893 $ 6,838 $ 18,898 $ 3,057 $ 3,453 $ — $ 12,142 $ 604 $ 63,885 Loans: Individually evaluated for impairment $ 4,861 $ 573 $ — $ 3,808 $ 2,519 $ — $ 20,362 $ 841 $ 32,964 Collectively evaluated for impairment 1,902,241 864,948 2,332,527 71,190 209,030 — 2,082,332 61,968 7,524,236 Total ending loan balances $ 1,907,102 $ 865,521 $ 2,332,527 $ 74,998 $ 211,549 $ — $ 2,102,694 $ 62,809 $ 7,557,200 The following table presents the activity and balance in the ALLL and the recorded investment, excluding accrued interest, in loans and leases based on the impairment methodology as of or for the three months ended March 31, 2018 : ($ in thousands) Commercial and Industrial Commercial Real Estate Multifamily SBA Construction Lease Financing Single Family Residential Mortgage Other Consumer Total ALLL: Balance at December 31, 2017 $ 14,280 $ 4,971 $ 13,265 $ 1,701 $ 3,318 $ — $ 10,996 $ 802 $ 49,333 Charge-offs (71 ) — — (381 ) — — (115 ) (14,072 ) (14,639 ) Recoveries 61 — — 65 — 4 436 4 570 Provision (reversal) 3,301 446 954 192 (98 ) (4 ) 652 14,056 19,499 Balance at March 31, 2018 $ 17,571 $ 5,417 $ 14,219 $ 1,577 $ 3,220 $ — $ 11,969 $ 790 $ 54,763 Individually evaluated for impairment $ 1,115 $ — $ — $ 124 $ — $ — $ 420 $ 21 $ 1,680 Collectively evaluated for impairment 16,456 5,417 14,219 1,453 3,220 — 11,549 769 53,083 Total ending ALLL balance $ 17,571 $ 5,417 $ 14,219 $ 1,577 $ 3,220 $ — $ 11,969 $ 790 $ 54,763 Loans: Individually evaluated for impairment $ 5,265 $ — $ — $ 359 $ — $ — $ 19,667 $ 766 $ 26,057 Collectively evaluated for impairment 1,633,294 773,193 1,944,082 78,663 200,766 3 2,181,691 92,758 6,904,450 Total ending loan balances $ 1,638,559 $ 773,193 $ 1,944,082 $ 79,022 $ 200,766 $ 3 $ 2,201,358 $ 93,524 $ 6,930,507
Loans and Leases Individually Evaluated for Impairment by Class of Loans and Leases	The following table presents loans and leases individually evaluated for impairment by class of loans and leases as of the dates indicated. The recorded investment, excluding accrued interest, presents customer balances net of any partial charge-offs recognized on the loans and leases and net of any deferred fees and costs and any purchase premium or discount. March 31, 2019 December 31, 2018 ($ in thousands) Unpaid Principal Balance Recorded Investment Allowance for Loan and Lease Losses Unpaid Principal Balance Recorded Investment Allowance for Loan and Lease Losses With no related ALLL recorded: Commercial: Commercial and industrial $ 4,849 $ 4,813 $ — $ 5,491 $ 5,455 $ — Commercial real estate 572 573 — — — — SBA 1,475 1,409 — 1,668 1,588 — Construction 2,519 2,519 — — — — Consumer: Single family residential mortgage 8,788 8,802 — 12,115 12,161 — Other consumer 469 469 — 469 469 — With an ALLL recorded: Commercial: Commercial and industrial 48 48 48 — — — SBA 2,499 2,399 1,634 823 788 562 Consumer: Single family residential mortgage 11,496 11,560 230 5,993 6,032 161 Other consumer 390 372 33 468 452 106 Total $ 33,105 $ 32,964 $ 1,945 $ 27,027 $ 26,945 $ 829 The following table presents information on impaired loans and leases, disaggregated by class, for the periods indicated: Three Months Ended ($ in thousands) Average Recorded Investment Interest Income Recognized Cash Basis Interest Recognized March 31, 2019 Commercial: Commercial and industrial $ 5,048 $ — $ — Commercial real estate 577 — — SBA 3,845 4 4 Construction 2,519 — — Consumer: Single family residential mortgage 19,323 58 49 Other consumer 844 3 3 Total $ 32,156 $ 65 $ 56 March 31, 2018 Commercial: Commercial and industrial $ 5,333 $ 3 $ 3 SBA 373 — — Consumer: Single family residential mortgage 19,715 57 49 Other consumer 749 3 2 Total $ 26,170 $ 63 $ 54
Aging of Recorded Investment in Past Due Loans and Leases	The following table presents the aging of the recorded investment in past due loans and leases, excluding accrued interest receivable (which is not considered to be material), by class of loans and leases as of dates indicated: ($ in thousands) 30 - 59 Days Past Due 60 - 89 Days Past Due Greater than 89 Days Past due Total Past Due Current Total March 31, 2019 NTM loans: Single family residential mortgage $ 13,162 $ — $ 292 $ 13,454 $ 774,600 $ 788,054 Other consumer — — — — 2,351 2,351 Total NTM loans 13,162 — 292 13,454 776,951 790,405 Traditional loans and leases: Commercial: Commercial and industrial 1,702 1,759 3,386 6,847 1,900,255 1,907,102 Commercial real estate — 7,286 573 7,859 857,662 865,521 Multifamily — — — — 2,332,527 2,332,527 SBA 766 1,052 798 2,616 72,382 74,998 Construction 667 — 2,519 3,186 208,363 211,549 Consumer: Single family residential mortgage 15,687 930 6,683 23,300 1,291,340 1,314,640 Other consumer 1,826 3 372 2,201 58,257 60,458 Total traditional loans and leases 20,648 11,030 14,331 46,009 6,720,786 6,766,795 Total $ 33,810 $ 11,030 $ 14,623 $ 59,463 $ 7,497,737 $ 7,557,200 December 31, 2018 NTM loans: Single family residential mortgage $ 7,430 $ 617 $ — $ 8,047 $ 816,271 $ 824,318 Other consumer — — — — 2,413 2,413 Total NTM loans 7,430 617 — 8,047 818,684 826,731 Traditional loans and leases: Commercial: Commercial and industrial 350 1,596 3,340 5,286 1,938,856 1,944,142 Commercial real estate — 582 — 582 866,431 867,013 Multifamily 356 — — 356 2,240,890 2,241,246 SBA 551 77 862 1,490 67,251 68,741 Construction — 939 — 939 203,037 203,976 Consumer: Single family residential mortgage 7,321 3,160 9,198 19,679 1,461,493 1,481,172 Other consumer 3,132 573 446 4,151 63,701 67,852 Total traditional loans and leases 11,710 6,927 13,846 32,483 6,841,659 6,874,142 Total $ 19,140 $ 7,544 $ 13,846 $ 40,530 $ 7,660,343 $ 7,700,873
Composition of Nonaccrual Loans and Leases	The following table presents non-accrual loans and leases as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) NTM Loans Traditional Loans and Leases Total NTM Loans Traditional Loans and Leases Total Non-accrual loans and leases Commercial: Commercial and industrial $ — $ 4,859 $ 4,859 $ — $ 5,455 $ 5,455 Commercial real estate — 573 573 — — — SBA — 3,971 3,971 — 2,574 2,574 Construction — 2,519 2,519 — — — Consumer: Single family residential mortgage 292 14,978 15,270 — 12,929 12,929 Other consumer — 547 547 — 627 627 Total non-accrual loans and leases $ 292 $ 27,447 $ 27,739 $ — $ 21,585 $ 21,585
Troubled Debt Restructurings	Troubled debt restructured loans and leases consisted of the following as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) NTM Loans Traditional Loans Total NTM Loans Traditional Loans Total Commercial: Commercial and industrial $ — $ 1,943 $ 1,943 $ — $ 2,276 $ 2,276 SBA — 187 187 — 187 187 Consumer: Single family residential mortgage 2,660 2,433 5,093 2,668 2,596 5,264 Other consumer 294 — 294 294 — 294 Total $ 2,954 $ 4,563 $ 7,517 $ 2,962 $ 5,059 $ 8,021 The following table summarizes the pre-modification and post-modification balances of the new TDRs for the periods indicated: Three Months Ended ($ in thousands) Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment March 31, 2019 Total — $ — $ — March 31, 2018 Commercial: Commercial and industrial 2 $ 171 $ 163 Total 2 $ 171 $ 163 The Company considers a TDR to be in payment default once it becomes 30 days or more past due following a modification. During the three months ended March 31, 2019 and 2018 , there were no loans and leases that were modified as TDRs during the past 12 months that had subsequent payment defaults during the periods. The following table summarizes TDRs by modification type for the periods indicated: Three Months Ended Modification Type Change in Principal Payments and Interest Rates Change in Principal Payments Total ($ in thousands) Count Amount Count Amount Count Amount March 31, 2019 Commercial: Commercial and industrial — $ — — $ — — $ — Total — $ — — $ — — $ — March 31, 2018 Commercial: Commercial and industrial — $ — 2 $ 163 2 $ 163 Total — $ — 2 $ 163 2 $ 163
Risk Categories for Loans and Leases	The following table presents the risk categories for total loans and leases as of the dates indicated: ($ in thousands) Pass Special Mention Substandard Doubtful Total March 31, 2019 NTM loans: Single family residential mortgage $ 772,205 $ 13,554 $ 2,295 $ — $ 788,054 Other consumer 2,351 — — — 2,351 Total NTM loans 774,556 13,554 2,295 — 790,405 Traditional loans and leases: Commercial: Commercial and industrial 1,806,891 43,511 56,700 — 1,907,102 Commercial real estate 847,213 13,741 4,567 — 865,521 Multifamily 2,329,615 — 2,912 — 2,332,527 SBA 60,082 4,316 9,798 802 74,998 Construction 201,254 5,105 5,190 — 211,549 Consumer: Single family residential mortgage 1,289,042 6,554 18,527 517 1,314,640 Other consumer 58,910 980 568 — 60,458 Total traditional loans and leases 6,593,007 74,207 98,262 1,319 6,766,795 Total $ 7,367,563 $ 87,761 $ 100,557 $ 1,319 $ 7,557,200 December 31, 2018 NTM loans: Single family residential mortgage $ 811,056 $ 10,966 $ 2,296 $ — $ 824,318 Other consumer 2,413 — — — 2,413 Total NTM loans 813,469 10,966 2,296 — 826,731 Traditional loans and leases: Commercial: Commercial and industrial 1,859,569 41,302 43,271 — 1,944,142 Commercial real estate 851,604 11,376 4,033 — 867,013 Multifamily 2,239,301 — 1,945 — 2,241,246 SBA 53,433 6,114 8,340 854 68,741 Construction 197,851 3,606 2,519 — 203,976 Consumer: Single family residential mortgage 1,461,721 2,602 16,849 — 1,481,172 Other consumer 66,228 979 645 — 67,852 Total traditional loans and leases 6,729,707 65,979 77,602 854 6,874,142 Total $ 7,543,176 $ 76,945 $ 79,898 $ 854 $ 7,700,873
Summary of Significant Activities	The following table presents loans and leases transferred from (to) loans held-for-sale by portfolio segment for the periods indicated: Three Months Ended March 31, 2019 2018 ($ in thousands) Transfers from Held-For-Sale Transfers (to) Held-For-Sale Transfers from Held-For-Sale Transfers (to) Held-For-Sale Consumer: Single family residential mortgage $ — $ (243,364 ) $ — $ (2,184 ) Other consumer — — — (4,362 ) Total $ — $ (243,364 ) $ — $ (6,546 )

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Components of Lease Expense	The components of lease expense were as follows: Three Months Ended March 31, ($ in thousands) 2019 Operating Lease Expense $ 1,776 Variable Lease Expense 89 Sublease Income (235 ) Total Lease Expense $ 1,630 Supplemental cash flow information related to leases was as follows: Three Months Ended March 31, ($ in thousands) 2019 Cash paid for amounts included in the measurement of lease liabilities for operating leases: Operating cash flows $ 1,881 ROU assets obtained in the exchange for lease liabilities: Operating leases 26,365
Supplemental Balance Sheet Information	Supplemental balance sheet information related to leases was as follows: ($ in thousands) March 31, Operating Leases: Operating lease right-of-use assets $ 24,519 Operating lease liabilities 25,893 March 31, 2019 Weighted-average remaining lease term (in years): Operating leases 6.80 years Weighted-average discount rate: Operating leases 2.85 %
Maturities of Lease Liabilities	Maturities of lease liabilities at March 31, 2019 were as follows: ($ in thousands) Operating Leases Remainder of 2019 $ 4,868 2020 6,323 2021 4,553 2022 3,051 2023 2,278 2024 1,513 Thereafter 6,338 Total lease payments 28,924 Less: present value discount (3,031 ) Total Lease Liability $ 25,893

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Tables)	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	As of March 31, 2019 , the weighted average remaining amortization period for core deposit intangibles was approximately 5.2 years . ($ in thousands) Gross Carrying Value Accumulated Amortization Net Carrying Value March 31, 2019 Core deposit intangibles $ 30,904 $ 25,178 $ 5,726 December 31, 2018 Core deposit intangibles $ 30,904 $ 24,558 $ 6,346
Estimated Future Amortization Expense	The following table presents estimated future amortization expenses as of March 31, 2019 : ($ in thousands) Remainder of 2019 2020 2021 2022 2023 2024 and After Total Estimated future amortization expense $ 1,575 $ 1,518 $ 1,082 $ 799 $ 517 $ 235 $ 5,726

FEDERAL HOME LOAN BANK ADVANC_2

FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS (Tables)	3 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Summary of Advances from the FHLB	The following table presents the Company's advances from the FHLB as of the dates indicated: ($ in thousands) March 31, 2019 December 31, 2018 Fixed rate: Outstanding balance $ 805,000 $ 805,000 Interest rates ranging from 1.61 % 1.61 % Interest rates ranging to 3.32 % 3.32 % Weighted average interest rate 2.58 % 2.58 % Variable rate: Outstanding balance 130,000 715,000 Weighted average interest rate 2.60 % 2.56 %

LONG-TERM DEBT (Tables)

LONG-TERM DEBT (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following table presents the Company's long-term debt as of the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Par Value Unamortized Debt Issuance Cost and Discount Par Value Unamortized Debt Issuance Cost and Discount 5.25% senior notes due April 15, 2025 $ 175,000 $ (1,797 ) $ 175,000 $ (1,826 ) Total $ 175,000 $ (1,797 ) $ 175,000 $ (1,826 )

DERIVATIVE INSTRUMENTS (Tables)

DERIVATIVE INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount and Market Value of Mortgage Banking Derivatives	The following table presents the notional amount and fair value of derivative instruments included in the Consolidated Statements of Financial Condition as of the dates indicated. March 31, 2019 December 31, 2018 ($ in thousands) Notional Amount Fair Value Notional Amount Fair Value Included in assets: Interest rate swaps and caps on loans $ 131,960 $ 2,309 $ 103,812 $ 1,534 Foreign exchange contracts 1,896 57 — — Total included in other assets $ 133,856 $ 2,366 $ 103,812 $ 1,534 Included in liabilities: Interest rate swaps and caps on loans $ 131,960 $ 2,497 $ 103,812 1,600 Foreign exchange contracts 1,896 32 — — Total included in accrued expenses and other liabilities $ 133,856 $ 2,529 $ 103,812 $ 1,600

EMPLOYEE STOCK COMPENSATION (Ta

EMPLOYEE STOCK COMPENSATION (Tables)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Share-Based Compensation Expense	The following table presents stock-based compensation expense and the related tax benefits for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Stock options $ 8 $ 33 Restricted stock awards and units 845 2,054 Total share-based compensation expense $ 853 $ 2,087 Related tax benefits $ 251 $ 612
Unrecognized Share-Based Compensation Expense	The following table presents unrecognized stock-based compensation expense as of March 31, 2019 : ($ in thousands) Unrecognized Expense Weighted-Average Remaining Expected Recognition Period Stock option awards $ 90 1.1 years Restricted stock awards and restricted stock units 6,911 2.1 years Total $ 7,001 2.1 years
Option Activity	The following table represents stock option activity for the three months ended March 31, 2019 : Three Months Ended March 31, 2019 ($ in thousands except per share data) Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contract Term Aggregated Intrinsic Value Outstanding at beginning of period 186,973 $ 13.54 5.8 years Forfeited (16,000 ) $ 13.29 6.1 years Outstanding at end of period 170,973 $ 13.56 5.5 years $ 47 Exercisable at end of period 123,125 $ 13.67 5.3 years $ 21
Nonvested Share	The following table sets forth information regarding unvested stock options for the three months ended March 31, 2019 . Three Months Ended March 31, 2019 Number of Shares Weighted-Average Exercise Price Per Share Outstanding at beginning of period 63,848 $ 13.30 Forfeited (16,000 ) $ 13.29 Outstanding at end of period 47,848 $ 13.30
Restricted Stock and Restricted Stock Units Activity	The following table presents unvested restricted stock awards and restricted stock units activity for the three months ended March 31, 2019 : Three Months Ended March 31, 2019 Number of Shares Weighted Average Grant Date Fair Value Per Share Outstanding at beginning of period 833,601 $ 19.02 Granted (1) 135,594 $ 14.75 Vested (2) (13,441 ) $ 16.99 Forfeited (3) (107,110 ) $ 20.38 Outstanding at end of period 848,644 $ 18.20 (1) There were no performance-based shares/units included in shares granted for the three months ended March 31, 2019 . (2) There were no performance-based shares/units included in vested shares for the three months ended March 31, 2019 . (3) The number of forfeited shares includes aggregate performance-based shares/units of 72,567 for the three months ended March 31, 2019
Summary of all Outstanding SARs	The following table represents SARs activity and the weighted average exercise price per share as of and for the three months ended March 31, 2019 : Three Months Ended March 31, 2019 ($ in thousands except per share data) Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Remaining Contract Term Aggregated Intrinsic Value Outstanding at beginning of period 1,559,012 $ 11.60 3.6 years $ 2,662 Outstanding at end of period 1,559,012 $ 11.60 3.4 years $ 3,488 Exercisable at end of period 1,559,012 $ 11.60 3.4 years $ 3,488

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Summary of Preferred Stock	The following table presents the Company's total outstanding preferred stock as of dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Shares Authorized and Outstanding Liquidation Preference Carrying Value Shares Authorized and Outstanding Liquidation Preference Carrying Value Series C 8.00% non-cumulative perpetual $ — $ — $ — $ — $ — $ — Series D 7.375% non-cumulative perpetual 115,000 115,000 110,873 115,000 115,000 110,873 Series E 7.00% non-cumulative perpetual 125,000 125,000 120,255 125,000 125,000 120,255 Total $ 240,000 $ 240,000 $ 231,128 $ 240,000 $ 240,000 $ 231,128
Changes to Accumulate Other Comprehensive Income by Components	The following table presents changes to AOCI for the periods indicated: Three Months Ended March 31, ($ in thousands) 2019 2018 Unrealized gain (loss) on securities available-for-sale Balance at beginning of period $ (24,117 ) $ 5,227 Unrealized gain (loss) arising during the period 8,746 (19,682 ) Reclassification adjustment from other comprehensive income (208 ) (5,241 ) Tax effect of current period changes (2,512 ) 7,658 Total changes, net of taxes 6,026 (17,265 ) Reclassification of stranded tax effects to retained earnings — 496 Balance at end of period $ (18,091 ) $ (11,542 )

VARIABLE INTEREST ENTITIES (Tab

VARIABLE INTEREST ENTITIES (Tables)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Unconsolidated VIEs	The following table represents the carrying value of the associated unconsolidated assets and liabilities and the associated maximum loss exposure for alternative energy partnerships as of the dates indicated: ($ in thousands) March 31, 2019 December 31, 2018 Cash $ 4,694 $ 3,012 Equipment, net of depreciation 257,475 259,464 Other assets 4,470 4,470 Total unconsolidated assets $ 266,639 $ 266,946 Total unconsolidated liabilities $ 6,269 $ 6,269 Maximum loss exposure $ 26,578 $ 28,988

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Common Share	The following table presents computations of basic and diluted earnings per common share for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 Three Months Ended March 31, 2018 ($ in thousands except per share data) Common Stock Class B Common Stock Total Common Stock Class B Common Stock Total Income from continuing operations $ 6,971 $ 66 $ 7,037 $ 7,003 $ 71 $ 7,074 Less: participating securities dividends (200 ) (2 ) (202 ) (201 ) (2 ) (203 ) Less: preferred stock dividends (4,267 ) (41 ) (4,308 ) (5,062 ) (51 ) (5,113 ) Income from continuing operations allocated to common stockholders 2,504 23 2,527 1,740 18 1,758 Income from discontinued operations — — — 1,469 15 1,484 Net income allocated to common stockholders $ 2,504 $ 23 $ 2,527 $ 3,209 $ 33 $ 3,242 Weighted average common shares outstanding 50,199,401 477,321 50,676,722 50,082,438 508,107 50,590,545 Dilutive effects of stock units 160,299 — 160,299 135,649 — 135,649 Dilutive effects of stock options 9,700 — 9,700 47,701 — 47,701 Dilutive effects of warrants — — — 151,635 — 151,635 Average shares and dilutive common shares 50,369,400 477,321 50,846,721 50,417,423 508,107 50,925,530 Basic earnings per common share Income from continuing operations $ 0.05 $ 0.05 $ 0.05 $ 0.03 $ 0.03 $ 0.03 Income from discontinued operations — — — 0.03 0.03 0.03 Net income $ 0.05 $ 0.05 $ 0.05 $ 0.06 $ 0.06 $ 0.06 Diluted earnings per common share Income from continuing operations $ 0.05 $ 0.05 $ 0.05 $ 0.03 $ 0.03 $ 0.03 Income from discontinued operations — — — 0.03 0.03 0.03 Net income $ 0.05 $ 0.05 $ 0.05 $ 0.06 $ 0.06 $ 0.06

LOAN COMMITMENTS AND OTHER RE_2

LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Contractual Amount of Financial Instruments with Off-Balance-Sheet Risk	The contractual amount of financial instruments with off-balance-sheet risk was as follows for the dates indicated: March 31, 2019 December 31, 2018 ($ in thousands) Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to extend credit (1) $ 2,168 $ 261,740 $ 2,167 $ 288,770 Unused lines of credit 935 1,105,354 1,514 1,119,158 Letters of credit 1,793 6,786 1,266 8,561 (1) Included no commitments to extend credit related to discontinued operations at December 31, 2018 .

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Summary of Noninterest Income	The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606 - Revenue From Contracts With Customers , for the periods indicated. Three Months Ended March 31, ($ in thousands) 2019 2018 Noninterest income In scope of Topic 606 Deposit service fees $ 667 $ 778 Debit card fees 113 225 Investment commissions 279 323 Other 106 155 Noninterest income (in-scope of Topic 606) 1,165 1,481 Noninterest income (out-of-scope of Topic 606) 5,130 7,101 Total noninterest income $ 6,295 $ 8,582

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)banking_office	Jan. 01, 2019USD ($)
Accounting Policies [Abstract]
Number of banking offices | banking_office	32
Change in Accounting Estimate [Line Items]
Restructuring costs incurred	$ 2,800
ROU assets	24,519
Operating lease liabilities	$ 25,893
ASU 2016-02
Change in Accounting Estimate [Line Items]
ROU assets		$ 23,300
Adjustment to remove deferred rent liability		1,400
Operating lease liabilities		$ 24,700

SALE OF BUSINESS UNIT (DISCON_2

SALE OF BUSINESS UNIT (DISCONTINUED OPERATIONS) - Banc Home Loans Sale Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on disposal	$ 0	$ 1,003,000
Assets of discontinued operations	0		$ 19,490,000
Banc Home Loan | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on disposal	0	1,003,000
Income from earn-out	492,000	$ 635,000
Assets of discontinued operations	0		19,500,000
Liabilities of discontinued operations	$ 0		$ 0

FAIR VALUES OF FINANCIAL INST_3

FAIR VALUES OF FINANCIAL INSTRUMENTS - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale that were 90 days or more past due and still accruing	$ 0	$ 0
Discontinued Operations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-sale that were 90 days or more past due and still accruing	$ 0	$ 0
Insured
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected loss rate	1.55%	1.55%
Uninsured
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected loss rate	20.00%	20.00%

FAIR VALUES OF FINANCIAL INST_4

FAIR VALUES OF FINANCIAL INSTRUMENTS - Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 1,471,303	$ 1,992,500
Loans held-for-sale	25,191	27,606
Derivative assets	2,366	1,534
Derivative liabilities	2,529	1,600
Discontinued Operations, Disposed of by Sale | Banc Home Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, carried at fair value	0	19,500
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Loans held-for-sale	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,471,303	1,992,500
Loans held-for-sale	2,122	2,566
Derivative assets	2,366	1,534
Derivative liabilities	2,529	1,600
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Loans held-for-sale	23,069	25,040
Derivative assets	0	0
Derivative liabilities	0	0
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,471,303	1,992,500
Loans held-for-sale	25,191	27,606
Derivative assets	2,366	1,534
Derivative liabilities	2,529	1,600
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0	0
Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	2,122	2,140
Recurring | Significant Other Observable Inputs (Level 2) | Discontinued Operations, Disposed of by Sale | Banc Home Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, carried at fair value	0	2,100
Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	23,069	25,040
Recurring | Significant Unobservable Inputs (Level 3) | Discontinued Operations, Disposed of by Sale | Banc Home Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, carried at fair value	0	17,400
Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	25,191	27,180
SBA loan pools securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	820	910
SBA loan pools securities | Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
SBA loan pools securities | Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	820	910
SBA loan pools securities | Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
SBA loan pools securities | Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	820	910
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	434,461	437,442
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities | Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities | Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	434,461	437,442
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities | Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities | Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	434,461	437,442
Non-agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	331	427
Non-agency residential mortgage-backed securities | Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Non-agency residential mortgage-backed securities | Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	331	427
Non-agency residential mortgage-backed securities | Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Non-agency residential mortgage-backed securities | Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	331	427
Non-agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		132,199
Non-agency commercial mortgage-backed securities | Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Non-agency commercial mortgage-backed securities | Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		132,199
Non-agency commercial mortgage-backed securities | Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Non-agency commercial mortgage-backed securities | Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		132,199
Collateralized loan obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,035,691	1,421,522
Collateralized loan obligations | Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Collateralized loan obligations | Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,035,691	1,421,522
Collateralized loan obligations | Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Collateralized loan obligations | Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,035,691	1,421,522
Interest rate swaps and caps on loans | Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Interest rate swaps and caps on loans | Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,309	1,534
Derivative liabilities	2,497	1,600
Interest rate swaps and caps on loans | Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Interest rate swaps and caps on loans | Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,309	1,534
Derivative liabilities	2,497	$ 1,600
Foreign exchange contracts | Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Derivative liabilities	0
Foreign exchange contracts | Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	57
Derivative liabilities	32
Foreign exchange contracts | Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Derivative liabilities	0
Foreign exchange contracts | Recurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	57
Derivative liabilities	$ 32

FAIR VALUES OF FINANCIAL INST_5

FAIR VALUES OF FINANCIAL INSTRUMENTS - Reconciliation of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Discontinued Operations, Disposed of by Sale | Banc Home Loan
Total gains or losses (realized/unrealized):
Loans held-for-sale, carried at fair value	$ 0		$ 19,500
Recurring | Significant Unobservable Inputs (Level 3) | Discontinued Operations, Disposed of by Sale | Banc Home Loan
Total gains or losses (realized/unrealized):
Loans held-for-sale, carried at fair value	0		17,400
Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	25,040	$ 98,940
Total gains or losses (realized/unrealized):
Included in earnings—fair value adjustment	3	(6)
Additions	0	24,620
Sales, paydowns, settlements, and other	(1,974)	(80,592)
Balance at end of period	23,069	42,962
Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities | Discontinued Operations, Disposed of by Sale | Banc Home Loan
Total gains or losses (realized/unrealized):
Loans held-for-sale, carried at fair value	$ 0	$ 24,000	$ 17,300	$ 32,300

FAIR VALUES OF FINANCIAL INST_6

FAIR VALUES OF FINANCIAL INSTRUMENTS - Fair Value Option Loans Held-for-Sale (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Continuing Operations
Fair Value
Total loans	$ 25,191		$ 7,690
Non-accrual loans	9,217		2,427
Unpaid Principal Balance
Total loans	25,932		7,906
Non-accrual loans	9,350		2,538
Difference
Total loans	(741)		(216)
Non-accrual loans	(133)		(111)
Non-accrual loans, guaranteed by US government	8,000		1,600
Net gains (losses) from fair value changes	1	$ (15)
Discontinued Operations
Fair Value
Total loans	0		19,490
Non-accrual loans	0		8,430
Unpaid Principal Balance
Total loans	0		20,027
Non-accrual loans	0		8,496
Difference
Total loans	0		(537)
Non-accrual loans	0		(66)
Non-accrual loans, guaranteed by US government	0		$ 7,600
Net gains (losses) from fair value changes	$ 0	$ 8

FAIR VALUES OF FINANCIAL INST_7

FAIR VALUES OF FINANCIAL INSTRUMENTS - Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Quoted Prices in Active Markets for Identical Assets (Level 1) | Single family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	$ 0
Significant Other Observable Inputs (Level 2) | Single family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0
Significant Other Observable Inputs (Level 2) | SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Significant Unobservable Inputs (Level 3) | Single family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	674
Significant Unobservable Inputs (Level 3) | SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	765	226
Carrying Value | Single family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	674
Carrying Value | SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 765	$ 226

FAIR VALUES OF FINANCIAL INST_8

FAIR VALUES OF FINANCIAL INSTRUMENTS - Gains and (Losses) on Non-Recurring Assets (Detail) - Nonrecurring - Impaired loans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Single family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	$ (490)	$ (115)
Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	0	(60)
SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	(54)	(381)
Other consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	$ (88)	$ (141)

FAIR VALUES OF FINANCIAL INST_9

FAIR VALUES OF FINANCIAL INSTRUMENTS - Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financial assets
Cash and cash equivalents	$ 304,705	$ 391,592
Securities available-for-sale	1,471,303	1,992,500
Federal Home Loan Bank and other bank stock	55,794	68,094
Loans held-for-sale	25,191	27,606
Loans and leases receivable, net of ALLL	7,360,071	7,513,910
Accrued interest receivable	36,468	38,807
Derivative assets	2,366	1,534
Financial liabilities
Deposits	7,536,887	7,689,324
Advances from Federal Home Loan Bank	938,536	1,517,761
Long term debt	173,483	174,059
Derivative liabilities	2,529	1,600
Accrued interest payable	16,726	13,253
Discontinued Operations, Disposed of by Sale | Banc Home Loan
Financial liabilities
Loans held-for-sale, carried at fair value	0	19,500
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
Cash and cash equivalents	304,705	391,592
Securities available-for-sale	0	0
Federal Home Loan Bank and other bank stock	0	0
Loans held-for-sale	0	0
Loans and leases receivable, net of ALLL	0	0
Accrued interest receivable	36,468	38,807
Derivative assets	0	0
Financial liabilities
Deposits	0	0
Advances from Federal Home Loan Bank	0	0
Long term debt	0	0
Derivative liabilities	0	0
Accrued interest payable	16,726	13,253
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring
Financial assets
Loans held-for-sale	0	0
Significant Other Observable Inputs (Level 2)
Financial assets
Cash and cash equivalents	0	0
Securities available-for-sale	1,471,303	1,992,500
Federal Home Loan Bank and other bank stock	55,794	68,094
Loans held-for-sale	2,122	2,566
Loans and leases receivable, net of ALLL	0	0
Accrued interest receivable	0	0
Derivative assets	2,366	1,534
Financial liabilities
Deposits	0	0
Advances from Federal Home Loan Bank	938,536	1,517,761
Long term debt	173,483	174,059
Derivative liabilities	2,529	1,600
Accrued interest payable	0	0
Significant Other Observable Inputs (Level 2) | Recurring
Financial assets
Loans held-for-sale	2,122	2,140
Significant Other Observable Inputs (Level 2) | Recurring | Discontinued Operations, Disposed of by Sale | Banc Home Loan
Financial liabilities
Loans held-for-sale, carried at fair value	0	2,100
Significant Unobservable Inputs (Level 3)
Financial assets
Cash and cash equivalents	0	0
Securities available-for-sale	0	0
Federal Home Loan Bank and other bank stock	0	0
Loans held-for-sale	23,069	25,040
Loans and leases receivable, net of ALLL	7,360,071	7,513,910
Accrued interest receivable	0	0
Derivative assets	0	0
Financial liabilities
Deposits	7,536,887	7,689,324
Advances from Federal Home Loan Bank	0	0
Long term debt	0	0
Derivative liabilities	0	0
Accrued interest payable	0	0
Significant Unobservable Inputs (Level 3) | Recurring
Financial assets
Loans held-for-sale	23,069	25,040
Significant Unobservable Inputs (Level 3) | Recurring | Discontinued Operations, Disposed of by Sale | Banc Home Loan
Financial liabilities
Loans held-for-sale, carried at fair value	0	17,400
Carrying Value
Financial assets
Cash and cash equivalents	304,705	391,592
Securities available-for-sale	1,471,303	1,992,500
Federal Home Loan Bank and other bank stock	55,794	68,094
Loans held-for-sale	25,191	27,606
Loans and leases receivable, net of ALLL	7,493,315	7,638,681
Accrued interest receivable	36,468	38,807
Derivative assets	2,366	1,534
Financial liabilities
Deposits	7,724,932	7,916,644
Advances from Federal Home Loan Bank	935,000	1,520,000
Long term debt	173,203	173,174
Derivative liabilities	2,529	1,600
Accrued interest payable	16,726	13,253
Carrying Value | Recurring
Financial assets
Loans held-for-sale	$ 25,191	$ 27,180

INVESTMENT SECURITIES - Summary

INVESTMENT SECURITIES - Summary of Amortized Cost and Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 1,496,951	$ 2,026,686
Gross Unrealized Gains	162	150
Gross Unrealized Losses	(25,810)	(34,336)
Fair Value	1,471,303	1,992,500
SBA loan pools securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	831	911
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(11)	(1)
Fair Value	820	910
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	448,956	461,987
Gross Unrealized Gains	18	0
Gross Unrealized Losses	(14,513)	(24,545)
Fair Value	434,461	437,442
Non-agency residential mortgage-backed securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	319	418
Gross Unrealized Gains	12	9
Gross Unrealized Losses	0	0
Fair Value	331	427
Non-agency commercial mortgage-backed securities
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost		132,199
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		132,199
Collateralized loan obligations
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	1,046,845	1,431,171
Gross Unrealized Gains	132	141
Gross Unrealized Losses	(11,286)	(9,790)
Fair Value	$ 1,035,691	$ 1,421,522

INVESTMENT SECURITIES - Proceed

INVESTMENT SECURITIES - Proceeds from Sales and Calls of Securities and Associated Gross Gains and Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Gross realized gains on sales and calls of securities available-for-sale	$ 208	$ 5,241
Gross realized losses on sales and calls of securities available-for-sale	0	0
Net realized gains on sales and calls of securities available-for-sale	208	5,241
Proceeds from sales and calls of securities available-for-sale	$ 521,684	$ 287,517

INVESTMENT SECURITIES - Additio

INVESTMENT SECURITIES - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2019USD ($)security	Dec. 31, 2018USD ($)security	Mar. 31, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
OTTI on investment securities	$ 0	$ 3,300,000	$ 0
Gross realized gains on sales and calls of securities available-for-sale	$ 208,000		5,241,000
Securities available for sale portfolio | security	99	145
Available for sale securities in unrealized loss position | security	88	118
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Securities pledged	$ 107,300,000	$ 163,000,000
Non-agency commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Securities sold	132,200,000
Gross realized gains on sales and calls of securities available-for-sale	9,000
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Securities sold	365,300,000
Gross realized gains on sales and calls of securities available-for-sale	$ 143,000
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Securities sold			76,800,000
Gross realized gains on sales and calls of securities available-for-sale			$ 4,900,000

INVESTMENT SECURITIES - Summa_2

INVESTMENT SECURITIES - Summary of Investment Securities with Unrealized Losses (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value
Less Than 12 Months	$ 940,694	$ 1,377,901
12 Months or Longer	426,115	457,632
Total	1,366,809	1,835,533
Gross Unrealized Losses
Less Than 12 Months	(17,101)	(9,613)
12 Months or Longer	(8,709)	(24,723)
Total	(25,810)	(34,336)
SBA loan pools securities
Fair Value
Less Than 12 Months	820	0
12 Months or Longer	0	910
Total	820	910
Gross Unrealized Losses
Less Than 12 Months	(11)	0
12 Months or Longer	0	(1)
Total	(11)	(1)
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities
Fair Value
Less Than 12 Months	200,351	13,494
12 Months or Longer	230,807	423,916
Total	431,158	437,410
Gross Unrealized Losses
Less Than 12 Months	(6,653)	(133)
12 Months or Longer	(7,860)	(24,412)
Total	(14,513)	(24,545)
Non-agency residential mortgage-backed securities
Fair Value
Less Than 12 Months	15	90
12 Months or Longer	7	16
Total	22	106
Gross Unrealized Losses
Less Than 12 Months	0	0
12 Months or Longer	0	0
Total	0	0
Collateralized loan obligations
Fair Value
Less Than 12 Months	739,508	1,364,317
12 Months or Longer	195,301	32,790
Total	934,809	1,397,107
Gross Unrealized Losses
Less Than 12 Months	(10,437)	(9,480)
12 Months or Longer	(849)	(310)
Total	$ (11,286)	$ (9,790)

INVESTMENT SECURITIES - Composi

INVESTMENT SECURITIES - Composition, Repricing and Yield Information of Investment Securities Portfolio (Details) $ in Thousands	Mar. 31, 2019USD ($)
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale, one year or less, fair value	$ 1,036,034
Securities available-for-sale, one year or less, weighted average yield (percent)	4.25%
Securities available-for-sale, more than one year through five years, fair value	$ 3,317
Securities available-for-sale, more than one year through five years, weighted average yield (percent)	3.16%
Securities available-for-sale, more than five years through ten years, fair value	$ 0
Securities available-for-sale, more than five years through ten years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than ten years, fair value	$ 431,952
Securities available-for-sale, more than ten years, weighted average yield (percent)	3.03%
Securities available-for-sale, fair value	$ 1,471,303
Securities available-for-sale, weighted average yield (percent)	3.89%
SBA loan pools securities
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale, one year or less, fair value	$ 0
Securities available-for-sale, one year or less, weighted average yield (percent)	0.00%
Securities available-for-sale, more than one year through five years, fair value	$ 0
Securities available-for-sale, more than one year through five years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than five years through ten years, fair value	$ 0
Securities available-for-sale, more than five years through ten years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than ten years, fair value	$ 820
Securities available-for-sale, more than ten years, weighted average yield (percent)	3.06%
Securities available-for-sale, fair value	$ 820
Securities available-for-sale, weighted average yield (percent)	3.06%
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale, one year or less, fair value	$ 267
Securities available-for-sale, one year or less, weighted average yield (percent)	2.71%
Securities available-for-sale, more than one year through five years, fair value	$ 3,317
Securities available-for-sale, more than one year through five years, weighted average yield (percent)	3.16%
Securities available-for-sale, more than five years through ten years, fair value	$ 0
Securities available-for-sale, more than five years through ten years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than ten years, fair value	$ 430,877
Securities available-for-sale, more than ten years, weighted average yield (percent)	3.06%
Securities available-for-sale, fair value	$ 434,461
Securities available-for-sale, weighted average yield (percent)	3.03%
Non-agency residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale, one year or less, fair value	$ 76
Securities available-for-sale, one year or less, weighted average yield (percent)	3.96%
Securities available-for-sale, more than one year through five years, fair value	$ 0
Securities available-for-sale, more than one year through five years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than five years through ten years, fair value	$ 0
Securities available-for-sale, more than five years through ten years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than ten years, fair value	$ 255
Securities available-for-sale, more than ten years, weighted average yield (percent)	5.57%
Securities available-for-sale, fair value	$ 331
Securities available-for-sale, weighted average yield (percent)	5.20%
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale, one year or less, fair value	$ 1,035,691
Securities available-for-sale, one year or less, weighted average yield (percent)	4.25%
Securities available-for-sale, more than one year through five years, fair value	$ 0
Securities available-for-sale, more than one year through five years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than five years through ten years, fair value	$ 0
Securities available-for-sale, more than five years through ten years, weighted average yield (percent)	0.00%
Securities available-for-sale, more than ten years, fair value	$ 0
Securities available-for-sale, more than ten years, weighted average yield (percent)	0.00%
Securities available-for-sale, fair value	$ 1,035,691
Securities available-for-sale, weighted average yield (percent)	4.25%

LOANS AND LEASES AND ALLOWANC_3

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Schedule of Loans and Leases Receivable (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 7,557,200	$ 7,700,873	$ 6,930,507
Allowance for loan and lease losses	(63,885)	(62,192)	(54,763)	$ (49,333)
Loans and leases receivable, net	$ 7,493,315	$ 7,638,681
Percentage to total loans and leases (percent)	100.00%	100.00%
NTM Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 790,405	$ 826,731
Percentage to total loans and leases (percent)	10.50%	10.70%
Deferred loan costs/(fees) and premiums/(discounts), net	$ 16,800	$ 17,700
Traditional Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 6,766,795	$ 6,874,142
Percentage to total loans and leases (percent)	89.50%	89.30%
Traditional Loans and Leases | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 211,549	$ 203,976
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,907,102	1,944,142	1,638,559
Allowance for loan and lease losses	(18,893)	(18,191)	(17,571)	(14,280)
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	865,521	867,013	773,193
Allowance for loan and lease losses	(6,838)	(6,674)	(5,417)	(4,971)
Commercial | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,332,527	2,241,246	1,944,082
Allowance for loan and lease losses	(18,898)	(17,970)	(14,219)	(13,265)
Commercial | SBA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	74,998	68,741	79,022
Allowance for loan and lease losses	(3,057)	(1,827)	(1,577)	(1,701)
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	211,549	203,976	200,766
Allowance for loan and lease losses	(3,453)	(3,461)	$ (3,220)	$ (3,318)
Commercial | NTM Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | SBA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0	0
Commercial | Traditional Loans and Leases | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,907,102	1,944,142
Commercial | Traditional Loans and Leases | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	865,521	867,013
Commercial | Traditional Loans and Leases | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,332,527	2,241,246
Commercial | Traditional Loans and Leases | SBA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	74,998	68,741
Commercial | Traditional Loans and Leases | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	211,549	203,976
Consumer | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,102,694	2,305,490
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	62,809	70,265
Consumer | NTM Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	790,405	826,731
Consumer | NTM Loans | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	788,054	824,318
Consumer | NTM Loans | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,351	2,413
Consumer | Traditional Loans and Leases | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,314,640	1,481,172
Consumer | Traditional Loans and Leases | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 60,458	$ 67,852

LOANS AND LEASES AND ALLOWANC_4

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Traditional Mortgage Loans Additional Information (Details)	3 Months Ended
	Mar. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan	Mar. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 7,557,200,000	$ 7,700,873,000	$ 6,930,507,000
NTM Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	790,405,000	826,731,000
Consumer | NTM Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 790,405,000	826,731,000
Consumer | NTM Loans | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest only notes balloon payment period	15 years
Consumer | NTM Loans | Interest Only Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 720,100,000	$ 753,100,000
Number of non-performing loans | loan	0	0
Nonperforming Financial Instruments | Consumer | NTM Loans | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 292,000	$ 0
Green Loans (HELOC) - first liens | Consumer | NTM Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	788,054,000	824,318,000
Green Loans (HELOC) - first liens | Consumer | NTM Loans | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	64,444,000	67,729,000
Green Loans (HELOC) - first liens | Consumer | NTM Loans | Interest Only Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	720,116,000	753,061,000
Green Loans (HELOC) - first liens | Consumer | NTM Loans | Negative amortization
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 3,494,000	$ 3,528,000
Number of non-performing loans | loan	0	0

LOANS AND LEASES AND ALLOWANC_5

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Traditional Mortgages Portfolio (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan	Mar. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 7,557,200	$ 7,700,873	$ 6,930,507
Concentration risk percentage (percent)	100.00%	100.00%
NTM Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 790,405	$ 826,731
Concentration risk percentage (percent)	10.50%	10.70%
Consumer | NTM Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | loan	579	628
Total loans and leases	$ 790,405	$ 826,731
Consumer | NTM Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	100.00%	100.00%
Consumer | NTM Loans | Loan Portfolio Concentration Risk | Loan Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	10.50%	10.70%
Consumer | NTM Loans | Interest Only Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 720,100	$ 753,100
Consumer | NTM Loans | Green Loans (HELOC) - first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | loan	571	618
Total loans and leases	$ 788,054	$ 824,318
Consumer | NTM Loans | Green Loans (HELOC) - first liens | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	99.70%	99.70%
Consumer | NTM Loans | Green Loans (HELOC) - first liens | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | loan	83	88
Total loans and leases	$ 64,444	$ 67,729
Consumer | NTM Loans | Green Loans (HELOC) - first liens | Green Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	8.20%	8.20%
Consumer | NTM Loans | Green Loans (HELOC) - first liens | Interest Only Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | loan	477	519
Total loans and leases	$ 720,116	$ 753,061
Consumer | NTM Loans | Green Loans (HELOC) - first liens | Interest Only Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	91.10%	91.10%
Consumer | NTM Loans | Green Loans (HELOC) - first liens | Negative amortization
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | loan	11	11
Total loans and leases	$ 3,494	$ 3,528
Consumer | NTM Loans | Green Loans (HELOC) - first liens | Negative amortization | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	0.40%	0.40%
Consumer | NTM Loans | Green Loans (HELOC) - second liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | loan	8	10
Total loans and leases	$ 2,351	$ 2,413
Consumer | NTM Loans | Green Loans (HELOC) - second liens | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	0.30%	0.30%
Consumer | NTM Loans | Green Loans (HELOC) - second liens | Green Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Count | loan	8	10
Total loans and leases	$ 2,351	$ 2,413
Consumer | NTM Loans | Green Loans (HELOC) - second liens | Green Loans | Loan Portfolio Concentration Risk | Nontraditional Mortgage Loans Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage (percent)	0.30%	0.30%

LOANS AND LEASES AND ALLOWANC_6

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-off amount	$ 1,063	$ 14,639
Total loans and leases	7,557,200	6,930,507	$ 7,700,873
Line of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-off amount		$ 13,900
Total loans and leases			15,000
Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded loan commitments	$ 4,200		$ 4,600

LOANS AND LEASES AND ALLOWANC_7

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 62,192	$ 49,333
Loans and leases charged off	(1,063)	(14,639)
Recoveries of loans and leases previously charged off	244	570
Provision for loan and lease losses	2,512	19,499
Balance at end of period	$ 63,885	$ 54,763

LOANS AND LEASES AND ALLOWANC_8

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses and Recorded Investment Excluding Accrued Interest in Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 62,192	$ 49,333
Charge-offs	(1,063)	(14,639)
Recoveries	244	570
Provision	2,512	19,499
Balance at end of period	63,885	54,763
Individually evaluated for impairment			$ 1,945		$ 1,680
Collectively evaluated for impairment			61,940		53,083
Total ending ALLL balance	62,192	49,333	63,885	$ 62,192	54,763
Loans:
Individually evaluated for impairment			32,964		26,057
Collectively evaluated for impairment			7,524,236		6,904,450
Total ending loan balances			7,557,200	7,700,873	6,930,507
Commercial | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	18,191	14,280
Charge-offs	(93)	(71)
Recoveries	33	61
Provision	762	3,301
Balance at end of period	18,893	17,571
Individually evaluated for impairment			48		1,115
Collectively evaluated for impairment			18,845		16,456
Total ending ALLL balance	18,191	14,280	18,893	18,191	17,571
Loans:
Individually evaluated for impairment			4,861		5,265
Collectively evaluated for impairment			1,902,241		1,633,294
Total ending loan balances			1,907,102	1,944,142	1,638,559
Commercial | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	6,674	4,971
Charge-offs	0	0
Recoveries	0	0
Provision	164	446
Balance at end of period	6,838	5,417
Individually evaluated for impairment			0		0
Collectively evaluated for impairment			6,838		5,417
Total ending ALLL balance	6,674	4,971	6,838	6,674	5,417
Loans:
Individually evaluated for impairment			573		0
Collectively evaluated for impairment			864,948		773,193
Total ending loan balances			865,521	867,013	773,193
Commercial | Multifamily
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	17,970	13,265
Charge-offs	0	0
Recoveries	0	0
Provision	928	954
Balance at end of period	18,898	14,219
Individually evaluated for impairment			0		0
Collectively evaluated for impairment			18,898		14,219
Total ending ALLL balance	17,970	13,265	18,898	17,970	14,219
Loans:
Individually evaluated for impairment			0		0
Collectively evaluated for impairment			2,332,527		1,944,082
Total ending loan balances			2,332,527	2,241,246	1,944,082
Commercial | SBA
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	1,827	1,701
Charge-offs	(356)	(381)
Recoveries	41	65
Provision	1,545	192
Balance at end of period	3,057	1,577
Individually evaluated for impairment			1,634		124
Collectively evaluated for impairment			1,423		1,453
Total ending ALLL balance	1,827	1,701	3,057	1,827	1,577
Loans:
Individually evaluated for impairment			3,808		359
Collectively evaluated for impairment			71,190		78,663
Total ending loan balances			74,998	68,741	79,022
Commercial | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	3,461	3,318
Charge-offs	0	0
Recoveries	0	0
Provision	(8)	(98)
Balance at end of period	3,453	3,220
Individually evaluated for impairment			0		0
Collectively evaluated for impairment			3,453		3,220
Total ending ALLL balance	3,461	3,318	3,453	3,461	3,220
Loans:
Individually evaluated for impairment			2,519		0
Collectively evaluated for impairment			209,030		200,766
Total ending loan balances			211,549	203,976	200,766
Commercial | Lease financing
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0	0
Charge-offs	0	0
Recoveries	3	4
Provision	(3)	(4)
Balance at end of period	0	0
Individually evaluated for impairment			0		0
Collectively evaluated for impairment			0		0
Total ending ALLL balance	0	0	0	0	0
Loans:
Individually evaluated for impairment			0		0
Collectively evaluated for impairment			0		3
Total ending loan balances			0		3
Consumer | Single Family Residential Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	13,128	10,996
Charge-offs	(526)	(115)
Recoveries	150	436
Provision	(610)	652
Balance at end of period	12,142	11,969
Individually evaluated for impairment			230		420
Collectively evaluated for impairment			11,912		11,549
Total ending ALLL balance	13,128	10,996	12,142	13,128	11,969
Loans:
Individually evaluated for impairment			20,362		19,667
Collectively evaluated for impairment			2,082,332		2,181,691
Total ending loan balances			2,102,694		2,201,358
Consumer | Other Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	941	802
Charge-offs	(88)	(14,072)
Recoveries	17	4
Provision	(266)	14,056
Balance at end of period	604	790
Individually evaluated for impairment			33		21
Collectively evaluated for impairment			571		769
Total ending ALLL balance	$ 941	$ 802	604	$ 941	790
Loans:
Individually evaluated for impairment			841		766
Collectively evaluated for impairment			61,968		92,758
Total ending loan balances			$ 62,809		$ 93,524

LOANS AND LEASES AND ALLOWANC_9

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Loans and Leases Individually Evaluated for Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Unpaid Principal Balance
Total	$ 33,105		$ 27,027
Recorded Investment
Total	32,964		26,945
Allowance for Loan and Lease Losses	1,945		829
Average Recorded Investment	32,156	$ 26,170
Interest Income Recognized	65	63
Cash Basis Interest Recognized	56	54
Commercial | Commercial and industrial
Unpaid Principal Balance
With no related allowance recorded	4,849		5,491
With an allowance recorded	48		0
Recorded Investment
With no related allowance recorded	4,813		5,455
With an allowance recorded	48		0
Allowance for Loan and Lease Losses	48		0
Average Recorded Investment	5,048	5,333
Interest Income Recognized	0	3
Cash Basis Interest Recognized	0	3
Commercial | Commercial real estate
Unpaid Principal Balance
With no related allowance recorded	572		0
Recorded Investment
With no related allowance recorded	573		0
Average Recorded Investment	577
Interest Income Recognized	0
Cash Basis Interest Recognized	0
Commercial | SBA
Unpaid Principal Balance
With no related allowance recorded	1,475		1,668
With an allowance recorded	2,499		823
Recorded Investment
With no related allowance recorded	1,409		1,588
With an allowance recorded	2,399		788
Allowance for Loan and Lease Losses	1,634		562
Average Recorded Investment	3,845	373
Interest Income Recognized	4	0
Cash Basis Interest Recognized	4	0
Commercial | Construction
Unpaid Principal Balance
With no related allowance recorded	2,519		0
Recorded Investment
With no related allowance recorded	2,519		0
Average Recorded Investment	2,519
Interest Income Recognized	0
Cash Basis Interest Recognized	0
Consumer | Single family residential mortgage
Unpaid Principal Balance
With no related allowance recorded	8,788		12,115
With an allowance recorded	11,496		5,993
Recorded Investment
With no related allowance recorded	8,802		12,161
With an allowance recorded	11,560		6,032
Allowance for Loan and Lease Losses	230		161
Average Recorded Investment	19,323	19,715
Interest Income Recognized	58	57
Cash Basis Interest Recognized	49	49
Consumer | Other consumer
Unpaid Principal Balance
With no related allowance recorded	469		469
With an allowance recorded	390		468
Recorded Investment
With no related allowance recorded	469		469
With an allowance recorded	372		452
Allowance for Loan and Lease Losses	33		$ 106
Average Recorded Investment	844	749
Interest Income Recognized	3	3
Cash Basis Interest Recognized	$ 3	$ 2

LOANS AND LEASES AND ALLOWAN_10

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Aging of Recorded Investment in Past Due Loans and Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 59,463	$ 40,530
Current	7,497,737	7,660,343
Total ending loan balances	7,557,200	7,700,873	$ 6,930,507
30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	33,810	19,140
60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,030	7,544
Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	14,623	13,846
NTM Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	790,405	826,731
Traditional Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	46,009	32,483
Current	6,720,786	6,841,659
Total ending loan balances	6,766,795	6,874,142
Traditional Loans and Leases | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	20,648	11,710
Traditional Loans and Leases | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,030	6,927
Traditional Loans and Leases | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	14,331	13,846
Traditional Loans and Leases | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	211,549	203,976
Consumer | Single family residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	2,102,694	2,305,490
Consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	62,809	70,265
Consumer | NTM Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13,454	8,047
Current	776,951	818,684
Total ending loan balances	790,405	826,731
Consumer | NTM Loans | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13,162	7,430
Consumer | NTM Loans | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	617
Consumer | NTM Loans | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	292	0
Consumer | NTM Loans | Single family residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13,454	8,047
Current	774,600	816,271
Total ending loan balances	788,054	824,318
Consumer | NTM Loans | Single family residential mortgage | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13,162	7,430
Consumer | NTM Loans | Single family residential mortgage | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	617
Consumer | NTM Loans | Single family residential mortgage | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	292	0
Consumer | NTM Loans | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	2,351	2,413
Total ending loan balances	2,351	2,413
Consumer | NTM Loans | Other consumer | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer | NTM Loans | Other consumer | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer | NTM Loans | Other consumer | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer | Traditional Loans and Leases | Single family residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	23,300	19,679
Current	1,291,340	1,461,493
Total ending loan balances	1,314,640	1,481,172
Consumer | Traditional Loans and Leases | Single family residential mortgage | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15,687	7,321
Consumer | Traditional Loans and Leases | Single family residential mortgage | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	930	3,160
Consumer | Traditional Loans and Leases | Single family residential mortgage | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,683	9,198
Consumer | Traditional Loans and Leases | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,201	4,151
Current	58,257	63,701
Total ending loan balances	60,458	67,852
Consumer | Traditional Loans and Leases | Other consumer | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,826	3,132
Consumer | Traditional Loans and Leases | Other consumer | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3	573
Consumer | Traditional Loans and Leases | Other consumer | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	372	446
Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	1,907,102	1,944,142	1,638,559
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	865,521	867,013	773,193
Commercial | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	2,332,527	2,241,246	1,944,082
Commercial | SBA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	74,998	68,741	79,022
Commercial | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	211,549	203,976	$ 200,766
Commercial | NTM Loans | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	0	0
Commercial | NTM Loans | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	0	0
Commercial | NTM Loans | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	0	0
Commercial | NTM Loans | SBA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	0	0
Commercial | NTM Loans | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balances	0	0
Commercial | Traditional Loans and Leases | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,847	5,286
Current	1,900,255	1,938,856
Total ending loan balances	1,907,102	1,944,142
Commercial | Traditional Loans and Leases | Commercial and industrial | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,702	350
Commercial | Traditional Loans and Leases | Commercial and industrial | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,759	1,596
Commercial | Traditional Loans and Leases | Commercial and industrial | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,386	3,340
Commercial | Traditional Loans and Leases | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,859	582
Current	857,662	866,431
Total ending loan balances	865,521	867,013
Commercial | Traditional Loans and Leases | Commercial real estate | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial | Traditional Loans and Leases | Commercial real estate | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,286	582
Commercial | Traditional Loans and Leases | Commercial real estate | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	573	0
Commercial | Traditional Loans and Leases | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	356
Current	2,332,527	2,240,890
Total ending loan balances	2,332,527	2,241,246
Commercial | Traditional Loans and Leases | Multifamily | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	356
Commercial | Traditional Loans and Leases | Multifamily | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial | Traditional Loans and Leases | Multifamily | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial | Traditional Loans and Leases | SBA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,616	1,490
Current	72,382	67,251
Total ending loan balances	74,998	68,741
Commercial | Traditional Loans and Leases | SBA | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	766	551
Commercial | Traditional Loans and Leases | SBA | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,052	77
Commercial | Traditional Loans and Leases | SBA | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	798	862
Commercial | Traditional Loans and Leases | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,186	939
Current	208,363	203,037
Total ending loan balances	211,549	203,976
Commercial | Traditional Loans and Leases | Construction | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	667	0
Commercial | Traditional Loans and Leases | Construction | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	939
Commercial | Traditional Loans and Leases | Construction | Greater than 89 Days Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,519	$ 0

LOANS AND LEASES AND ALLOWAN_11

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Composition of Nonaccrual Loans and Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	$ 27,739	$ 21,585
NTM Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	292	0
Traditional Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	27,447	21,585
Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	4,859	5,455
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	573	0
Commercial | SBA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	3,971	2,574
Commercial | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	2,519	0
Commercial | NTM Loans | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	0	0
Commercial | NTM Loans | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	0	0
Commercial | NTM Loans | SBA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	0	0
Commercial | NTM Loans | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	0	0
Commercial | Traditional Loans and Leases | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	4,859	5,455
Commercial | Traditional Loans and Leases | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	573	0
Commercial | Traditional Loans and Leases | SBA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	3,971	2,574
Commercial | Traditional Loans and Leases | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	2,519	0
Consumer | Single family residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	15,270	12,929
Consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	547	627
Consumer | NTM Loans | Single family residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	292	0
Consumer | NTM Loans | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	0	0
Consumer | Traditional Loans and Leases | Single family residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	14,978	12,929
Consumer | Traditional Loans and Leases | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total non-accrual loans and leases	$ 547	$ 627

LOANS AND LEASES AND ALLOWAN_12

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Nonaccrual Loans and Leases Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 90 days past due and still accruing	$ 731	$ 470
Consumer | Single family residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans in process of foreclosure	$ 4,000	$ 5,100

LOANS AND LEASES AND ALLOWAN_13

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Components of Troubled Debt Restructured Loans and Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	$ 7,517	$ 8,021
NTM Loans
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	2,954	2,962
Traditional Loans and Leases
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	4,563	5,059
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	1,943	2,276
Commercial | SBA
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	187	187
Commercial | NTM Loans | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	0	0
Commercial | NTM Loans | SBA
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	0	0
Commercial | Traditional Loans and Leases | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	1,943	2,276
Commercial | Traditional Loans and Leases | SBA
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	187	187
Consumer | Single family residential mortgage
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	5,093	5,264
Consumer | Other consumer
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	294	294
Consumer | NTM Loans | Single family residential mortgage
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	2,660	2,668
Consumer | NTM Loans | Other consumer
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	294	294
Consumer | Traditional Loans and Leases | Single family residential mortgage
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	2,433	2,596
Consumer | Traditional Loans and Leases | Other consumer
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans and leases	$ 0	$ 0

LOANS AND LEASES AND ALLOWAN_14

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Loans and Leases by Class Modified as Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)loan	Mar. 31, 2018USD ($)loan
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0
Pre- Modification Outstanding Recorded Investment	$ 0
Post-Modification Outstanding Recorded Investment	$ 0
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	2
Post-Modification Outstanding Recorded Investment	$ 0	$ 163
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		2
Pre- Modification Outstanding Recorded Investment		$ 171
Post-Modification Outstanding Recorded Investment		$ 163
Consumer | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		2
Pre- Modification Outstanding Recorded Investment		$ 171
Post-Modification Outstanding Recorded Investment		$ 163

LOANS AND LEASES AND ALLOWAN_15

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Summary of TDR Modification Type (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)loan	Mar. 31, 2018USD ($)loan
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0
Post-Modification Outstanding Recorded Investment | $	$ 0
Commercial | Change in Principal Payments and Interest Rates
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0
Post-Modification Outstanding Recorded Investment | $	$ 0
Commercial | Change in Principal Payments
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0
Post-Modification Outstanding Recorded Investment | $	$ 0
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	2
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 163
Commercial | Commercial and industrial | Change in Principal Payments and Interest Rates
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 0
Commercial | Commercial and industrial | Change in Principal Payments
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	2
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 163
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		2
Post-Modification Outstanding Recorded Investment | $		$ 163
Consumer | Change in Principal Payments and Interest Rates
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		0
Post-Modification Outstanding Recorded Investment | $		$ 0
Consumer | Change in Principal Payments
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		2
Post-Modification Outstanding Recorded Investment | $		$ 163
Consumer | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		2
Post-Modification Outstanding Recorded Investment | $		$ 163

LOANS AND LEASES AND ALLOWAN_16

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Troubled Debt Restructurings Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)loan	Mar. 31, 2018loan	Dec. 31, 2018USD ($)
Receivables [Abstract]
Accruing TDRs	$ 5.6		$ 5.7
Nonaccruing TDRs	$ 1.9		$ 2.3
Number of loans modified that had payments default during the period | loan	0	0

LOANS AND LEASES AND ALLOWAN_17

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Credit Quality Indicators Additional Information (Details)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Loans delinquent	60 days

LOANS AND LEASES AND ALLOWAN_18

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Risk Categories for Loans and Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	$ 7,557,200	$ 7,700,873	$ 6,930,507
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	7,367,563	7,543,176
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	87,761	76,945
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	100,557	79,898
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	1,319	854
NTM Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	790,405	826,731
Traditional Loans and Leases
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	6,766,795	6,874,142
Traditional Loans and Leases | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	6,593,007	6,729,707
Traditional Loans and Leases | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	74,207	65,979
Traditional Loans and Leases | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	98,262	77,602
Traditional Loans and Leases | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	1,319	854
Traditional Loans and Leases | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	211,549	203,976
Consumer | Single family residential mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,102,694	2,305,490
Consumer | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	62,809	70,265
Consumer | NTM Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	790,405	826,731
Consumer | NTM Loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	774,556	813,469
Consumer | NTM Loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	13,554	10,966
Consumer | NTM Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,295	2,296
Consumer | NTM Loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Consumer | NTM Loans | Single family residential mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	788,054	824,318
Consumer | NTM Loans | Single family residential mortgage | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	772,205	811,056
Consumer | NTM Loans | Single family residential mortgage | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	13,554	10,966
Consumer | NTM Loans | Single family residential mortgage | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,295	2,296
Consumer | NTM Loans | Single family residential mortgage | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Consumer | NTM Loans | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,351	2,413
Consumer | NTM Loans | Other consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,351	2,413
Consumer | NTM Loans | Other consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Consumer | NTM Loans | Other consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Consumer | NTM Loans | Other consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Consumer | Traditional Loans and Leases | Single family residential mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	1,314,640	1,481,172
Consumer | Traditional Loans and Leases | Single family residential mortgage | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	1,289,042	1,461,721
Consumer | Traditional Loans and Leases | Single family residential mortgage | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	6,554	2,602
Consumer | Traditional Loans and Leases | Single family residential mortgage | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	18,527	16,849
Consumer | Traditional Loans and Leases | Single family residential mortgage | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	517	0
Consumer | Traditional Loans and Leases | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	60,458	67,852
Consumer | Traditional Loans and Leases | Other consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	58,910	66,228
Consumer | Traditional Loans and Leases | Other consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	980	979
Consumer | Traditional Loans and Leases | Other consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	568	645
Consumer | Traditional Loans and Leases | Other consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	1,907,102	1,944,142	1,638,559
Commercial | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	865,521	867,013	773,193
Commercial | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,332,527	2,241,246	1,944,082
Commercial | SBA
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	74,998	68,741	79,022
Commercial | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	211,549	203,976	$ 200,766
Commercial | NTM Loans | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | SBA
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | NTM Loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | Traditional Loans and Leases | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	1,907,102	1,944,142
Commercial | Traditional Loans and Leases | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	1,806,891	1,859,569
Commercial | Traditional Loans and Leases | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	43,511	41,302
Commercial | Traditional Loans and Leases | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	56,700	43,271
Commercial | Traditional Loans and Leases | Commercial and industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | Traditional Loans and Leases | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	865,521	867,013
Commercial | Traditional Loans and Leases | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	847,213	851,604
Commercial | Traditional Loans and Leases | Commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	13,741	11,376
Commercial | Traditional Loans and Leases | Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	4,567	4,033
Commercial | Traditional Loans and Leases | Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | Traditional Loans and Leases | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,332,527	2,241,246
Commercial | Traditional Loans and Leases | Multifamily | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,329,615	2,239,301
Commercial | Traditional Loans and Leases | Multifamily | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | Traditional Loans and Leases | Multifamily | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	2,912	1,945
Commercial | Traditional Loans and Leases | Multifamily | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	0	0
Commercial | Traditional Loans and Leases | SBA
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	74,998	68,741
Commercial | Traditional Loans and Leases | SBA | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	60,082	53,433
Commercial | Traditional Loans and Leases | SBA | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	4,316	6,114
Commercial | Traditional Loans and Leases | SBA | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	9,798	8,340
Commercial | Traditional Loans and Leases | SBA | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	802	854
Commercial | Traditional Loans and Leases | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	211,549	203,976
Commercial | Traditional Loans and Leases | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	201,254	197,851
Commercial | Traditional Loans and Leases | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	5,105	3,606
Commercial | Traditional Loans and Leases | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	5,190	2,519
Commercial | Traditional Loans and Leases | Construction | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases	$ 0	$ 0

LOANS AND LEASES AND ALLOWAN_19

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Purchases, Sales, and Transfers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain on sale of loans	$ 1,553	$ (41)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfers from Held-For-Sale	0	0
Transfers (to) Held-For-Sale	(243,364)	(6,546)
Net gain on sale of loans	1,600
Consumer | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfers from Held-For-Sale	0	0
Transfers (to) Held-For-Sale	(243,364)	(2,184)
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfers from Held-For-Sale	0	0
Transfers (to) Held-For-Sale	$ 0	$ (4,362)

LOANS AND LEASES AND ALLOWAN_20

LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Purchase Credit Impaired Loans Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain (loss) on sale of loans	$ 1,553	$ (41)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain (loss) on sale of loans	$ 1,600

LEASES - Narrative (Details)

LEASES - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Aggregate rent obligation of leases not yet commenced	$ 1.1
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 month
Lease extension period, up to	3 years
Lease terms of leases not yet commenced	3 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	20 years
Lease extension period, up to	5 years
Lease terms of leases not yet commenced	5 years

LEASES - Components of Lease Ex

LEASES - Components of Lease Expense and Supplemental Cash Flow information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating Lease Expense	$ 1,776
Variable Lease Expense	89
Sublease Income	(235)
Total Lease Expense	1,630
Operating leases cash paid for amounts included in the measurement of lease liabilities for operating leases:	1,881
Operating lease right of use assets recognized	$ 26,365

LEASES - Supplemental Balance S

LEASES - Supplemental Balance Sheet information (Details) $ in Thousands	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease right-of-use assets	$ 24,519
Operating lease liabilities	$ 25,893
Operating lease weighted-average remaining lease term (in years)	6 years 9 months 19 days
Operating lease weighted-average discount rate (percent)	2.85%

LEASES - Maturities of Lease Li

LEASES - Maturities of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019USD ($)
Leases [Abstract]
Remainder of 2019	$ 4,868
2020	6,323
2021	4,553
2022	3,051
2023	2,278
2024	1,513
Thereafter	6,338
Total lease payments	28,924
Less: present value discount	(3,031)
Total Lease Liability	$ 25,893

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Detail) - USD ($)	Aug. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 37,144,000		$ 37,144,000
Goodwill write-off	$ 0
Aggregate amortization expense		$ 620,000	$ 843,000
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period		5 years 2 months 4 days
Core deposit intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period of other intangible assets		4 years
Core deposit intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period of other intangible assets		10 years

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Other Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Net Carrying Value	$ 5,726
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	30,904	$ 30,904
Accumulated Amortization	25,178	24,558
Net Carrying Value	$ 5,726	$ 6,346

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Estimated Future Amortization Expense (Detail) $ in Thousands	Mar. 31, 2019USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2019	$ 1,575
2019	1,518
2021	1,082
2022	799
2023	517
2024	235
Net Carrying Value	$ 5,726

FEDERAL HOME LOAN BANK ADVANC_3

FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS - Additional Information (Detail) - USD ($)	Feb. 14, 2019	Mar. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Advances from FHLB collateralized		$ 3,660,000,000	$ 4,050,000,000
Securities sold under repurchase agreements		0	0
Line of Credit | Unsecured Federal Funds Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility		185,000,000
Other borrowings		0
Line of Credit | Line of Credit Maturing February 13, 2020
Line of Credit Facility [Line Items]
Line of credit facility	$ 15,000,000
Other borrowings		0
Line of Credit | Line of Credit Maturing February 13, 2020 | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
Federal Reserve Bank Advances
Line of Credit Facility [Line Items]
Line of credit facility		21,000,000
Other borrowings		0
Collateralized loan obligations
Line of Credit Facility [Line Items]
Advances from FHLB collateralized		0	0
Collateralized loan obligations | Federal Reserve Bank Advances
Line of Credit Facility [Line Items]
Collateral on line of credit facility		28,300,000
Federal Home Loan Bank of San Francisco
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB stock		28,700,000	$ 41,000,000
Amount of additional available borrowing		$ 1,720,000,000

FEDERAL HOME LOAN BANK ADVANC_4

FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS - Summary of Advances from the FHLB (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fixed rate:
Outstanding balance	$ 805,000	$ 805,000
Variable rate:
Outstanding balance	$ 130,000	$ 715,000
Weighted average interest rate (percent)	2.60%	2.56%
Minimum
Fixed rate:
Interest rate (percent)	1.61%	1.61%
Maximum
Fixed rate:
Interest rate (percent)	3.32%	3.32%
Weighted average (percent)
Fixed rate:
Interest rate (percent)	2.58%	2.58%

LONG-TERM DEBT - Additional Inf

LONG-TERM DEBT - Additional Information (Detail) - USD ($)	Apr. 06, 2015	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par Value		$ 175,000,000	$ 175,000,000
Senior Notes
Debt Instrument [Line Items]
Redemption period		90 days
Minimum redemption period notice required		30 days
Maximum redemption period notice required		60 days
Redemption price, percentage		100.00%
Senior Notes | 5.25% Senior Notes Due April 15, 2025
Debt Instrument [Line Items]
Par Value	$ 175,000,000	$ 175,000,000	$ 175,000,000
Stated interest rate	5.25%	5.25%
Net proceeds from issuance of long term debt	$ 172,800,000

LONG-TERM DEBT - Summary of Lon

LONG-TERM DEBT - Summary of Long-Term Debt (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018	Apr. 06, 2015
Debt Instrument [Line Items]
Par Value	$ 175,000,000	$ 175,000,000
Unamortized Debt Issuance Cost and Discount	$ (1,797,000)	(1,826,000)
Senior Notes | 5.25% Senior Notes Due April 15, 2025
Debt Instrument [Line Items]
Stated interest rate	5.25%		5.25%
Par Value	$ 175,000,000	175,000,000	$ 175,000,000
Unamortized Debt Issuance Cost and Discount	$ (1,797,000)	$ (1,826,000)

INCOME TAXES - Additional Infor

INCOME TAXES - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 2,700,000	$ (5,800,000)
Effective tax rate (percent)	27.90%	(209.50%)
Tax credit		$ 7,300,000
Valuation allowance	$ 0		$ 0
Net deferred tax asset	45,100,000		49,400,000
Valuation Allowance [Line Items]
Unrecognized tax benefits	1,200,000		1,200,000
Unrecognized tax benefits that would impact the effective tax rate	1,000,000
Accrued interest or penalties	0		$ 0
Year-to-date temporary book-tax differences
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax asset	1,800,000
Unrealized gain on securities available-for-sale
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax asset	$ 2,500,000

DERIVATIVE INSTRUMENTS - Amount

DERIVATIVE INSTRUMENTS - Amount and Market Value of Mortgage Banking Derivatives (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Notional Amount Assets	$ 133,856	$ 103,812
Derivatives asset, fair values	2,366	1,534
Notional Amount Liability	133,856	103,812
Derivatives liability, fair values	2,529	1,600
Interest rate swaps and caps on loans
Derivatives, Fair Value [Line Items]
Notional Amount Assets	131,960	103,812
Derivatives asset, fair values	2,309	1,534
Notional Amount Liability	131,960	103,812
Derivatives liability, fair values	2,497	1,600
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Notional Amount Assets	1,896	0
Derivatives asset, fair values	57	0
Notional Amount Liability	1,896	0
Derivatives liability, fair values	$ 32	$ 0

EMPLOYEE STOCK COMPENSATION - A

EMPLOYEE STOCK COMPENSATION - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Mar. 24, 2016	Aug. 21, 2012	Mar. 31, 2019
Stock option awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Award expiration period			7 years
Stock option awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
Award expiration period			10 years
Restricted stock awards and restricted stock units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Restricted stock awards and restricted stock units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
Initial SAR | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		2 years
Award expiration period		10 years
SARs granted (in shares)		500,000
Base price per share (in dollars per share)		$ 12.12
Performance based restricted stock | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate grant date fair value market value	$ 5
2018 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized for grant			4,417,882
Common stock available under new plan (in shares)			4,212,347

EMPLOYEE STOCK COMPENSATION - S

EMPLOYEE STOCK COMPENSATION - Share Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 853	$ 2,087
Related tax benefits	251	612
Unrecognized Expense	$ 7,001
Weighted-Average Remaining Expected Recognition Period	2 years 1 month
Stock option awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 8	33
Unrecognized Expense	$ 90
Weighted-Average Remaining Expected Recognition Period	1 year 1 month 20 days
Restricted stock awards and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 845	$ 2,054
Unrecognized Expense	$ 6,911
Weighted-Average Remaining Expected Recognition Period	2 years 1 month

EMPLOYEE STOCK COMPENSATION - O

EMPLOYEE STOCK COMPENSATION - Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Number of Shares
Outstanding at beginning of period (in shares)	186,973
Forfeited (in shares)	(16,000)
Outstanding at end of period (in shares)	170,973	186,973
Exercisable at end of period (in shares)	123,125
Weighted-Average Exercise Price Per Share
Outstanding at beginning of period (in dollars per share)	$ 13.54
Forfeited (in dollars per share)	13.29
Outstanding at end of period (in dollars per share)	13.56	$ 13.54
Exercisable at end of period (in dollars per share)	$ 13.67
Weighted-Average Remaining Contract Term
Outstanding	5 years 6 months	5 years 9 months 22 days
Forfeited	6 years 1 month
Exercisable at end of period	5 years 3 months
Aggregated Intrinsic Value
Outstanding	$ 47
Exercisable at end of period	$ 21

EMPLOYEE STOCK COMPENSATION - N

EMPLOYEE STOCK COMPENSATION - Nonvested Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Number of Shares
Non-vested outstanding at beginning of period (in shares) | shares	63,848
Forfeited (in shares) | shares	16,000
Non-vested outstanding at end of period (in shares) | shares	47,848
Weighted- Average Exercise Price per Share
Non-vested outstanding at beginning of period (in dollars per share) | $ / shares	$ 13.30
Forfeited (in dollars per share) | $ / shares	13.29
Non-vested outstanding at end of period (in dollars per share) | $ / shares	$ 13.30

EMPLOYEE STOCK COMPENSATION -_2

EMPLOYEE STOCK COMPENSATION - Nonvested Restricted Stock Awards and Restricted Stock Units (Detail)	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Restricted stock awards and restricted stock units
Number of Shares
Outstanding at beginning of period (in shares)	833,601
Granted (in shares)	135,594
Vested (in shares)	(13,441)
Forfeited (in shares)	(107,110)
Outstanding at end of period (in shares)	848,644
Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 19.02
Granted (in dollars per share) | $ / shares	14.75
Vested (in dollars per share) | $ / shares	16.99
Forfeited (in dollars per share) | $ / shares	20.38
Outstanding at end of period (in dollars per share) | $ / shares	$ 18.20
Performance Shares
Number of Shares
Granted (in shares)	0
Vested (in shares)	0
Forfeited (in shares)	(72,567)

EMPLOYEE STOCK COMPENSATION -_3

EMPLOYEE STOCK COMPENSATION - Summary of SARs Activity (Details) - Stock appreciation rights - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2019	Jun. 30, 2018	Dec. 31, 2018
Number of Shares
Outstanding at beginning of period (in shares)	1,559,012
Outstanding at end of period (in shares)	1,559,012
Exercisable at end of period (in shares)	1,559,012
Weighted-Average Exercise Price Per Share
Outstanding at beginning of period (in dollars per share)	$ 11.60
Outstanding at end of period (in dollars per share)	11.60
Exercisable at end of period (in dollars per share)	$ 11.60
Weighted-Average Remaining Contract Term
Outstanding	3 years 4 months 24 days	3 years 7 months
Exercisable at end of period	3 years 4 months 24 days
Aggregated Intrinsic Value
Outstanding	$ 3,488		$ 2,662
Exercisable at end of period	$ 3,488

STOCKHOLDERS' EQUITY - Warrants

STOCKHOLDERS' EQUITY - Warrants (Details) - $ / shares

Jun. 30, 2018

Jun. 06, 2018

Mar. 31, 2018

Mar. 30, 2018

Dec. 27, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2016

Sep. 30, 2016

Jun. 17, 2016

Mar. 09, 2016

Dec. 08, 2015

Aug. 03, 2015

Nov. 01, 2010

Dec. 31, 2016

Mar. 31, 2019

Dec. 31, 2017

Aug. 17, 2016

Aug. 16, 2016

Class of Stock [Line Items]

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 11

Cor Advisors Llc

Class of Stock [Line Items]

Warrants issued (in shares)

1,395,000

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 11

Common Stock | Class B Common Stock

Class of Stock [Line Items]

Issuance of shares of voting common stock (in shares)

70,690

Common Stock | Class A Common Stock

Class of Stock [Line Items]

Issuance of shares of voting common stock (in shares)

70,690

TCW Shared Opportunity Fund

Class of Stock [Line Items]

Warrants issued (in shares)

240,000

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 9.13

$ 11

Warrant exercisable period

5 years

President And Chief Executive Officer | Cor Advisors Llc

Class of Stock [Line Items]

Warrants issued (in shares)

960,000

480,000

Warrants exercised (in shares)

90,000

President And Chief Executive Officer | Cor Advisors Llc | Exercisable on September 30, 2017

Class of Stock [Line Items]

Warrants issued (in shares)

90,000

Issuance of shares of voting common stock (in shares)

52,284

President And Chief Executive Officer | Cor Advisors Llc | Exercisable on December 31, 2017

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 8.49

Issuance of shares of voting common stock (in shares)

77,413

Warrants exercised (in shares)

130,000

President And Chief Executive Officer | Cor Advisors Llc | Exercisable on March 31, 2018

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 8.44

Issuance of shares of voting common stock (in shares)

72,159

Warrants exercised (in shares)

130,000

President And Chief Executive Officer | Cor Advisors Llc | Exercisable on June 30, 2018

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 8.38

Issuance of shares of voting common stock (in shares)

73,543

Warrants exercised (in shares)

130,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche One

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche Two

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche Three

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche Four

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche Five

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche Six

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche Seven

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

President And Chief Executive Officer | Cor Advisors Llc | Tranche Eight

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

Vice President and Chief Lending Officer

Class of Stock [Line Items]

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 8.80

$ 8.84

$ 8.90

$ 9.04

Vice President and Chief Lending Officer | Cor Advisors Llc

Class of Stock [Line Items]

Warrants issued (in shares)

435,000

0

Issuance of shares of voting common stock (in shares)

40,081

70,775

53,711

37,355

Warrants exercised (in shares)

80,000

130,000

130,000

95,000

Vice President and Chief Lending Officer | Cor Advisors Llc | Tranche One

Class of Stock [Line Items]

Warrants issued (in shares)

95,000

Vice President and Chief Lending Officer | Cor Advisors Llc | Tranche Two

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Vice President and Chief Lending Officer | Cor Advisors Llc | Tranche Three

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Vice President and Chief Lending Officer | Cor Advisors Llc | Tranche Four

Class of Stock [Line Items]

Warrants issued (in shares)

80,000

Brother of President and Chief Executive Officer | Cor Advisors Llc

Class of Stock [Line Items]

Warrants issued (in shares)

480,000

Exercise price of warrants for non-voting common stock (in dollars per share)

$ 8.55

$ 8.55

$ 8.61

$ 8.66

$ 8.72

$ 8.80

$ 8.72

Warrants exercised (in shares)

40,000

130,000

130,000

130,000

50,000

Brother of President and Chief Executive Officer | Cor Advisors Llc | Exercisable on September 30, 2016

Class of Stock [Line Items]

Warrants issued (in shares)

50,000

Brother of President and Chief Executive Officer | Cor Advisors Llc | Exercisable on December 31, 2016

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Brother of President and Chief Executive Officer | Cor Advisors Llc | Exercisable on March 31, 2017

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Brother of President and Chief Executive Officer | Cor Advisors Llc | Exercisable on June 30, 2017

Class of Stock [Line Items]

Warrants issued (in shares)

130,000

Brother of President and Chief Executive Officer | Cor Advisors Llc | Exercisable on September 30, 2017

Class of Stock [Line Items]

Warrants issued (in shares)

40,000

Brother of President and Chief Executive Officer | Class B Common Stock | Cor Advisors Llc

Class of Stock [Line Items]

Number of shares canceled (in shares)

176,488

Brother of President and Chief Executive Officer | Class A Common Stock | Cor Advisors Llc

Class of Stock [Line Items]

Common stock, shares issued (in shares)

176,488

Brother of President and Chief Executive Officer | Common Stock | Class B Common Stock | Cor Advisors Llc

Class of Stock [Line Items]

Issuance of shares of voting common stock (in shares)

23,237

77,376

75,875

Brother of President and Chief Executive Officer | Common Stock | Class A Common Stock | Cor Advisors Llc

Class of Stock [Line Items]

Issuance of shares of voting common stock (in shares)

25,051

64,962

STOCKHOLDERS' EQUITY - Preferre

STOCKHOLDERS' EQUITY - Preferred Stock (Details) - Preferred Stock - USD ($) $ / shares in Units, $ in Millions	Sep. 17, 2018	Mar. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Preferred stock, authorized (in shares)		240,000,000	240,000,000
Preferred stock, par value (in dollars per share)		$ 0.01
Preferred stock, liquidation preference per share (in dollars per share)		$ 1,000
Payment for redemption of shares	$ 40.3
Series C 8.00% non-cumulative perpetual
Class of Stock [Line Items]
Preferred stock, authorized (in shares)		0	0
Shares redeemed (in shares)	40,250
Non cumulative preferred stock, dividend rate	8.00%	8.00%	8.00%
Liquidation amount (in usd per share)	$ 1,000
Series C Depository Shares
Class of Stock [Line Items]
Shares redeemed (in shares)	1,610,000
Liquidation amount (in usd per share)	$ 25
Deferred issuance costs reclassified to retained earnings	$ 2.3
Maximum
Class of Stock [Line Items]
Preferred stock, authorized (in shares)		50,000,000

STOCKHOLDERS' EQUITY - Summary

STOCKHOLDERS' EQUITY - Summary of Preferred Stock (Details) - USD ($) $ in Thousands	Sep. 17, 2018	Feb. 08, 2016	Mar. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Carrying Value			$ 231,128	$ 231,128
Series E 7.00% non-cumulative perpetual
Class of Stock [Line Items]
Non cumulative preferred stock, dividend rate		7.00%
Preferred Stock
Class of Stock [Line Items]
Preferred stock, authorized (in shares)			240,000,000	240,000,000
Preferred stock, outstanding (in shares)			240,000,000	240,000,000
Liquidation Preference			$ 240,000	$ 240,000
Carrying Value			$ 231,128	$ 231,128
Preferred Stock | Series C 8.00% non-cumulative perpetual
Class of Stock [Line Items]
Preferred stock, authorized (in shares)			0	0
Preferred stock, outstanding (in shares)			0	0
Liquidation Preference			$ 0	$ 0
Carrying Value			$ 0	$ 0
Non cumulative preferred stock, dividend rate	8.00%		8.00%	8.00%
Preferred Stock | Series D 7.375% non-cumulative perpetual
Class of Stock [Line Items]
Preferred stock, authorized (in shares)			115,000,000	115,000,000
Preferred stock, outstanding (in shares)			115,000,000	115,000,000
Liquidation Preference			$ 115,000	$ 115,000
Carrying Value			$ 110,873	$ 110,873
Non cumulative preferred stock, dividend rate			7.375%	7.375%
Preferred Stock | Series E 7.00% non-cumulative perpetual
Class of Stock [Line Items]
Preferred stock, authorized (in shares)			125,000,000	125,000,000
Preferred stock, outstanding (in shares)			125,000,000	125,000,000
Liquidation Preference			$ 125,000	$ 125,000
Carrying Value			$ 120,255	$ 120,255
Non cumulative preferred stock, dividend rate			7.00%	7.00%

STOCKHOLDERS' EQUITY - Changes

STOCKHOLDERS' EQUITY - Changes to Accumulate Other Comprehensive Income by Components (Detail) - Gain (loss) on securities available-for-sale - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ (24,117)	$ 5,227
Unrealized gain (loss) arising during the period	8,746	(19,682)
Reclassification adjustment from other comprehensive income	(208)	(5,241)
Tax effect of current period changes	(2,512)	7,658
Total changes, net of taxes	6,026	(17,265)
Reclassification of stranded tax effects to retained earnings	0	496
Balance at end of period	$ (18,091)	$ (11,542)

VARIABLE INTEREST ENTITIES - Su

VARIABLE INTEREST ENTITIES - Summary of Unconsolidated VIEs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Variable Interest Entity [Line Items]
Gain (loss) on investments in alternative energy partnerships	$ (1,950)	$ 34
Tax credit		7,300
Funding of equity investment	574	275
Affordable Housing Fund Investment
Variable Interest Entity [Line Items]
Aggregate funding commitment	29,300
Total amount funded	18,200
Funding of equity investment	454	14
Amortization expense	637	497
Alternative investments unfunded investment commitments	11,100
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Gain (loss) on investments in alternative energy partnerships	(2,000)	34
Tax credit	0	7,300
Cash	4,694		$ 3,012
Equipment, net of depreciation	257,475		259,464
Other assets	4,470		4,470
Total unconsolidated assets	266,639		266,946
Total unconsolidated liabilities	6,269		6,269
Maximum loss exposure	26,578		28,988
Variable Interest Entity, Not Primary Beneficiary | Affordable Housing Fund Investment
Variable Interest Entity [Line Items]
Tax credit	555	475
Maximum loss exposure	19,300		$ 20,000
Variable Interest Entity, Not Primary Beneficiary | Other Assets
Variable Interest Entity [Line Items]
Total unconsolidated assets	$ 26,600	$ 48,300

EARNINGS PER COMMON SHARE - Com

EARNINGS PER COMMON SHARE - Computations for Basic and Diluted Earnings/(Loss) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Earnings Per Share [Line Items]
Income from continuing operations	$ 7,037	$ 7,074
Less: participating securities dividends	(202)	(203)
Less: preferred stock dividends	(4,308)	(5,113)
Income from continuing operations allocated to common stockholders	2,527	1,758
Income from discontinued operations	0	1,484
Net income available to common stockholders	$ 2,527	$ 3,242
Weighted average common shares outstanding (in shares)	50,676,722	50,590,545
Dilutive effects of warrants (in shares)	0	151,635
Average shares and dilutive common shares (in shares)	50,846,721	50,925,530
Basic earnings per common share
Income from continuing operations (in usd per share)	$ 0.05	$ 0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	0.05	0.06
Diluted earnings per common share
Income from continuing operations (in usd per share)	0.05	0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	$ 0.05	$ 0.06
Stock Units
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	160,299	135,649
Stock Option
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	9,700	47,701
Class A Common Stock
Schedule of Earnings Per Share [Line Items]
Income from continuing operations	$ 6,971	$ 7,003
Less: participating securities dividends	(200)	(201)
Less: preferred stock dividends	(4,267)	(5,062)
Income from continuing operations allocated to common stockholders	2,504	1,740
Income from discontinued operations	0	1,469
Net income available to common stockholders	$ 2,504	$ 3,209
Weighted average common shares outstanding (in shares)	50,199,401	50,082,438
Dilutive effects of warrants (in shares)	0	151,635
Average shares and dilutive common shares (in shares)	50,369,400	50,417,423
Basic earnings per common share
Income from continuing operations (in usd per share)	$ 0.05	$ 0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	0.05	0.06
Diluted earnings per common share
Income from continuing operations (in usd per share)	0.05	0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	$ 0.05	$ 0.06
Class A Common Stock | Stock Units
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	160,299	135,649
Class A Common Stock | Stock Option
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	9,700	47,701
Class B Common Stock
Schedule of Earnings Per Share [Line Items]
Income from continuing operations	$ 66	$ 71
Less: participating securities dividends	(2)	(2)
Less: preferred stock dividends	(41)	(51)
Income from continuing operations allocated to common stockholders	23	18
Income from discontinued operations	0	15
Net income available to common stockholders	$ 23	$ 33
Weighted average common shares outstanding (in shares)	477,321	508,107
Dilutive effects of warrants (in shares)	0	0
Average shares and dilutive common shares (in shares)	477,321	508,107
Basic earnings per common share
Income from continuing operations (in usd per share)	$ 0.05	$ 0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	0.05	0.06
Diluted earnings per common share
Income from continuing operations (in usd per share)	0.05	0.03
Income from discontinued operations (in usd per share)	0	0.03
Net income (in usd per share)	$ 0.05	$ 0.06
Class B Common Stock | Stock Units
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0	0
Class B Common Stock | Stock Option
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0	0

EARNINGS PER COMMON SHARE - Add

EARNINGS PER COMMON SHARE - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2019	Sep. 30, 2017
Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock excluded from computation of earnings per share (in shares)	180,304	1,288
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock excluded from computation of earnings per share (in shares)	16,165	0

LOAN COMMITMENTS AND OTHER RE_3

LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES - Contractual Amount of Financial Instruments with Off-Balance-Sheet Risk (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Commitments to extend credit
Other Commitments [Line Items]
Fixed Rate	$ 2,168,000	$ 2,167,000
Variable Rate	261,740,000	288,770,000
Commitments to extend credit | Banc Home Loan | Discontinued Operations
Other Commitments [Line Items]
Commitments to extend credit		0
Unused lines of credit
Other Commitments [Line Items]
Fixed Rate	935,000	1,514,000
Variable Rate	1,105,354,000	1,119,158,000
Letters of credit
Other Commitments [Line Items]
Fixed Rate	1,793,000	1,266,000
Variable Rate	$ 6,786,000	$ 8,561,000

LOAN COMMITMENTS AND OTHER RE_4

LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES - Additional Information (Detail) - USD ($)	3 Months Ended			12 Months Ended	32 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2018	Mar. 31, 2019
Other Commitments [Line Items]
Commitments to make loans, period, maximum	30 days
Affordable Housing Fund Investment
Other Commitments [Line Items]
Alternative investments unfunded investment commitments	$ 11,100,000				$ 11,100,000
Small Business Investment Companies
Other Commitments [Line Items]
Alternative investments unfunded investment commitments	8,600,000				8,600,000
Other Investments
Other Commitments [Line Items]
Alternative investments unfunded investment commitments	500,000				500,000
Los Angeles Football Club (LAFC) Naming Rights, Revenue Rights, And Other Sponsorship Rights
Other Commitments [Line Items]
Maximum commitment	100,000,000	$ 100,000,000		$ 100,000,000	100,000,000
Related party term of contract		15 years
Advertising and promotion expense	1,700,000	$ 1,700,000
Payments for naming rights	1,400,000		$ 10,000,000	$ 5,300,000	16,700,000
Prepaid commitment balance, net of amortization	$ 8,400,000				$ 8,400,000

REVENUE RECOGNITION - Summary o

REVENUE RECOGNITION - Summary of Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	$ 1,165	$ 1,481
Noninterest income (out-of-scope of Topic 606)	5,130	7,101
Total noninterest income	6,295	8,582
Deposit service fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	667	778
Debit card fees
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	113	225
Investment commissions
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	279	323
Other
Disaggregation of Revenue [Line Items]
Noninterest income (in-scope of Topic 606)	$ 106	$ 155

RELATED-PARTY TRANSACTIONS - Re

RELATED-PARTY TRANSACTIONS - Related Party Transactions (Details) - Officers and Directors - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Loans to certain officers and directors and their related interests	$ 0	$ 0
Deposits from principal officers, directors, and their related interests	$ 26,600	$ 11,100

RELATED-PARTY TRANSACTIONS - Cu

RELATED-PARTY TRANSACTIONS - Current Related Party Indemnification Costs and SECT Transactions (Details) - USD ($) $ in Thousands	Dec. 28, 2017	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Common Stock | Variable Interest Entity, Primary Beneficiary
Related Party Transaction [Line Items]
Number of shares repurchased (in shares)	2,500,000
Evercore Trust Company
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)					2,500,000
Special Committee Investigation Indemnification | Director | Halle J. Benett
Related Party Transaction [Line Items]
Expenses from transactions with related parties		$ 147	$ 854
Special Committee Investigation Indemnification | Director | Jonah F. Schnel
Related Party Transaction [Line Items]
Expenses from transactions with related parties			854
Special Committee Investigation Indemnification | Director | Robert Sznewajs
Related Party Transaction [Line Items]
Expenses from transactions with related parties			854
Special Committee Investigation Indemnification | General Counsel
Related Party Transaction [Line Items]
Expenses from transactions with related parties				$ 501
Special Committee Investigation Indemnification | General Counsel | Emeritus John Grosvenor
Related Party Transaction [Line Items]
Expenses from transactions with related parties			$ 415

RELATED-PARTY TRANSACTIONS - Sa

RELATED-PARTY TRANSACTIONS - Sabal Loan (Details) - Loan Purchase Commitments - Limited Liability Company Controlled By Affiliate Of Greater Than 5% Shareholder, Oaktree - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Mar. 31, 2019	Jul. 31, 2018	Jun. 11, 2017	Jun. 26, 2015
Related Party Transaction [Line Items]
Committed revolving repurchase facility					$ 40,000,000	$ 35,000,000
Largest aggregate amount of principal outstanding during period	$ 0	$ 32,500,000
Amount outstanding		0	$ 0	$ 3,500,000
Proceeds from principal	0	210,400,000
Proceeds from interest	$ 0	$ 370,000
Maximum
Related Party Transaction [Line Items]
Committed revolving repurchase facility			$ 100,000,000

RELATED-PARTY TRANSACTIONS - Tr

RELATED-PARTY TRANSACTIONS - Transactions Involving Underwriting Services (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 27, 2016	Mar. 08, 2016	Feb. 08, 2016
Series E 7.00% non-cumulative perpetual
Related Party Transaction [Line Items]
Non cumulative preferred stock, dividend rate			7.00%
Underwritten Public Offering
Related Party Transaction [Line Items]
Depository shares issued (in shares)			5,000,000
Offering price per share (in dollars per share)			$ 25
Underwritten Public Offering | Series E 7.00% non-cumulative perpetual
Related Party Transaction [Line Items]
Depository shares to preferred stock ratio			2.50%
Preferred stock, liquidation preference per share (in dollars per share)			$ 1,000
Underwritten Public Offering | Common Stock
Related Party Transaction [Line Items]
Issuance of stock shares (in shares)		5,577,500
Director | Financial Advisory Services
Related Party Transaction [Line Items]
Expenses from transactions with related parties	$ 516
Expenses from transactions with related parties, net of related expenses	$ 500
Director | Underwriting Fees
Related Party Transaction [Line Items]
Expenses from transactions with related parties			$ 944
Expenses from transactions with related parties, net of related expenses			$ 849
Director | Underwriting Fees | Common Stock
Related Party Transaction [Line Items]
Expenses from transactions with related parties		$ 1,000
Expenses from transactions with related parties, net of related expenses		$ 846

RELATED-PARTY TRANSACTIONS - Le

RELATED-PARTY TRANSACTIONS - Legion Affiliates (Details) - USD ($) $ in Thousands	Mar. 13, 2017	Mar. 31, 2019	Apr. 26, 2018	May 19, 2017
Greater Than 5% Shareholder, Legion Partners Asset Management, LLC
Related Party Transaction [Line Items]
Ownership percentage			4.80%	5.60%
Reimbursable expense threshold	$ 100
Greater Than 5% Shareholder, Legion Partners Asset Management, LLC | Voting Common Stock
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)			2,439,751	2,938,679
Director | Bonnie G. Hill
Related Party Transaction [Line Items]
Service term		1 year

RELATED-PARTY TRANSACTIONS - PL

RELATED-PARTY TRANSACTIONS - PL Capital Affiliates (Details) - Greater Than 5% Shareholder, PL Capital Advisors, LLC - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Feb. 10, 2017
Related Party Transaction [Line Items]
Ownership percentage		6.90%
Expenses from transactions with related parties	$ 150
Voting Common Stock
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)		3,427,219

RELATED-PARTY TRANSACTIONS - _2

RELATED-PARTY TRANSACTIONS - Transactions with Patriot Affiliates (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 07, 2014	Oct. 30, 2014	Mar. 31, 2019	Feb. 24, 2017
Greater Than 5% Shareholder, Patriot | Equity Support Payment
Related Party Transaction [Line Items]
Expenses from transactions with related parties	$ 538
Greater Than 5% Shareholder, Patriot | Reimbursement of Out-of-Pocket Expenses
Related Party Transaction [Line Items]
Expenses from transactions with related parties	$ 100
Greater Than 5% Shareholder, Patriot | Voting Common Stock
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)	3,100,564			1,461,945
Ownership percentage	9.30%
Greater Than 5% Shareholder, Patriot | Voting Common Stock | Voting Common Stock Option One
Related Party Transaction [Line Items]
Common stock issuable (in shares)		1,076,000
Price per share issuable (in dollars per share)		$ 9.78
Greater Than 5% Shareholder, Patriot | Voting Common Stock | Voting Common Stock Option Two
Related Party Transaction [Line Items]
Common stock issuable (in shares)		824,000
Price per share issuable (in dollars per share)		$ 11.55
Director | W. Kirk Wycoff
Related Party Transaction [Line Items]
Service term			1 year

RELATED-PARTY TRANSACTIONS - Fo

RELATED-PARTY TRANSACTIONS - Former Related Party Indemnification Costs and Settlement Agreement (Details) - USD ($) $ in Thousands	Feb. 14, 2018	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Special Committee Investigation Indemnification | Former President And Chief Executive Officer
Related Party Transaction [Line Items]
Expenses from transactions with related parties		$ 2,200	$ 8,500	$ 3,000
Special Committee Investigation Indemnification | Former Management Vice Chair
Related Party Transaction [Line Items]
Expenses from transactions with related parties		0	497	1,400
Special Committee Investigation Indemnification | Former Interim Chief Financial Officer and Chief Strategy Officer
Related Party Transaction [Line Items]
Expenses from transactions with related parties		555
Special Committee Investigation Indemnification | Former Director
Related Party Transaction [Line Items]
Expenses from transactions with related parties				509
Special Committee Investigation Indemnification | Former Director | Cynthia Abercrombie
Related Party Transaction [Line Items]
Expenses from transactions with related parties		0	292
Special Committee Investigation Indemnification | Former Director | Jeffrey Karish
Related Party Transaction [Line Items]
Expenses from transactions with related parties		$ 0	854
Special Committee Investigation Indemnification | Former Interim Chief Financial Officer and Chief Strategy Officer and Former Chief Financial Officer
Related Party Transaction [Line Items]
Expenses from transactions with related parties			$ 400	$ 631
Termination Of Employment Settlement Agreement | Former Management Vice Chair
Related Party Transaction [Line Items]
Expenses from transactions with related parties	$ 4,300
Company ownership percentage maximum threshold	4.99%
Termination Of Employment Settlement Agreement, Cash Proceeds From Unvested Stock Options And Restricted Stock Awards | Former Management Vice Chair
Related Party Transaction [Line Items]
Expenses from transactions with related parties	$ 576
Termination Of Employment Settlement Agreement, Reimbursement For Health Care Premiums | Former Management Vice Chair
Related Party Transaction [Line Items]
Expenses from transactions with related parties	38
Termination Of Employment Settlement Agreement, Attorneys Fees | Former Management Vice Chair
Related Party Transaction [Line Items]
Expenses from transactions with related parties	$ 650

RELATED-PARTY TRANSACTIONS - LA

RELATED-PARTY TRANSACTIONS - LAFC Financing (Details) - USD ($)	Aug. 22, 2016	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2032	Dec. 31, 2031	Dec. 31, 2030	Dec. 31, 2029	Dec. 31, 2028	Dec. 31, 2027	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Sep. 30, 2018	Nov. 24, 2017	Aug. 08, 2016
Related Party Transaction [Line Items]
Deposits		$ 7,724,932,000																	$ 7,916,644,000		$ 7,724,932,000
Line of Credit | Los Angeles Football Club (LAFC) | Corporate Credit Card
Related Party Transaction [Line Items]
Line of credit facility																							$ 100,000
Letters of credit
Related Party Transaction [Line Items]
Letters of Credit outstanding																							$ 100,000
Los Angeles Football Club (LAFC) Naming Rights, Revenue Rights, And Other Sponsorship Rights
Related Party Transaction [Line Items]
Related party term of contract			15 years
Related party renewal term of contract	10 years
Future annual payments for naming rights, revenue rights and other sponsorship rights		1,400,000		$ 10,000,000															5,300,000		16,700,000
Advertising and promotion expense		1,700,000	$ 1,700,000
Maximum commitment		100,000,000	$ 100,000,000																100,000,000		100,000,000
Prepaid commitment balance, net of amortization		8,400,000																			8,400,000
Los Angeles Football Club (LAFC) Naming Rights, Revenue Rights, And Other Sponsorship Rights | Scenario, Forecast
Related Party Transaction [Line Items]
Future annual payments for naming rights, revenue rights and other sponsorship rights					$ 6,700,000	$ 6,600,000	$ 6,500,000	$ 6,400,000	$ 6,300,000	$ 6,200,000	$ 6,100,000	$ 6,000,000	$ 5,900,000	$ 5,800,000	$ 5,700,000	$ 5,600,000	$ 5,500,000	$ 5,400,000
Stadco Loan | Immediate Family Member of Chief Executive Officer, Brother | Los Angeles Football Club (LAFC)
Related Party Transaction [Line Items]
Committed line of credit																								$ 40,300,000
Committed line of credit, maximum borrowing																								145,000,000
Outstanding advances		0																	0		0
Largest amount of principal outstanding		0																	33,800,000
Unused loan fees		0																	66,000	$ 295,000
Interest income		0																	1,100,000	325,000
Team Loan | Immediate Family Member of Chief Executive Officer, Brother | Los Angeles Football Club (LAFC)
Related Party Transaction [Line Items]
Committed line of credit																								9,700,000
Committed line of credit, maximum borrowing																								$ 35,000,000
Outstanding advances		9,700,000																	9,700,000		$ 9,700,000
Largest amount of principal outstanding																			9,700,000
Unused loan fees		0																	22,000
Interest income		$ 158,000																	$ 471,000
Various Entities Affiliated With LAFC | Affiliated Entity
Related Party Transaction [Line Items]
Deposits																				$ 19,400,000		$ 22,400,000

RELATED-PARTY TRANSACTIONS - _3

RELATED-PARTY TRANSACTIONS - Legal Fees and Other Matters (Details) - Entity Affiliated with Former President and Chief Executive Officer $ in Thousands	1 Months Ended	3 Months Ended		24 Months Ended
	Feb. 28, 2018letter_of_credit	Mar. 31, 2019	Mar. 31, 2017USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2017letter_of_credit
Legal Fees and Credit
Related Party Transaction [Line Items]
Legal services period (more than four months)		4 months
Expenses from transactions with related parties | $			$ 330	$ 0
Number of letters of credit outstanding					3
Number of letters or credit that were canceled	3
Loans And Leases Receivable, Number Of Letters Of Credit Drawn, Related Party					0
Reimbursement of Legal Dispute
Related Party Transaction [Line Items]
Expenses from transactions with related parties | $			$ 100

RELATED-PARTY TRANSACTIONS - Co

RELATED-PARTY TRANSACTIONS - Consulting Agreement for the Bank (Details) - USD ($) $ in Thousands	Nov. 30, 2016	Dec. 31, 2017
Mr. Carlos Salas
Related Party Transaction [Line Items]
Salary		$ 17
Chief Executive Officer Of COR Clearing, LLC | Management and Services Agreement
Related Party Transaction [Line Items]
Expenses from transactions with related parties	$ 108

RELATED-PARTY TRANSACTIONS - _4

RELATED-PARTY TRANSACTIONS - Transactions Involving CS Financial and Jeffrey T. Seabold (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 31, 2016	Nov. 02, 2015	Oct. 31, 2014	Oct. 31, 2013
Performance Shares
Related Party Transaction [Line Items]
Number of shares (in shares)				92,781
CS Financial
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)				173,791
Par value of stocks issued (in dollars per share)				$ 0.01
Cash paid for acquisition				$ 1.5
Noninterest-bearing note				$ 3.2
CS Financial | Managing Director and Chief Lending Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)				103,663
CS Financial | Brother of President and Chief Executive Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)				16,140
CS Financial | Sister-in-Law of President and Chief Executive Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)				16,140
CS Financial | Father of President and Chief Executive Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)				3,228
CS Financial | Certain Employees of Acquired Entity
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)				34,620
CS Financial | Performance Shares | Managing Director and Chief Lending Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)	28,547	28,545	28,545
CS Financial | Performance Shares | Brother of President and Chief Executive Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)	1,083	1,082	1,082
CS Financial | Performance Shares | Sister-in-Law of President and Chief Executive Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)	1,083	1,082	1,082
CS Financial | Performance Shares | Father of President and Chief Executive Officer
Related Party Transaction [Line Items]
Shares paid as merger consideration (in shares)	218	216	216

LITIGATION - Additional Informa

LITIGATION - Additional Information (Details) $ in Thousands	Mar. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Accrued litigation expense	$ 682

Uncategorized Items - banc-2019

Label	Element	Value
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 1,012,308,000
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(496,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	144,343,000
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	496,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	5,723,000
Preferred Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	269,071,000
Treasury Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(28,786,000)
Additional Paid-in Capital [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	621,435,000
Common Class A [Member] | Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	517,000
Common Class B [Member] | Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 5,000