East West Bancorp (EWBC) 10-Q 6 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 30, 2016
Document and Entity Information
Entity Registrant Name	EAST WEST BANCORP INC
Entity Central Index Key	1,069,157
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		144,100,097
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 2,265,297	$ 1,360,887
Short-term investments	305,548	299,916
Securities purchased under resale agreements (“resale agreements”)	1,800,000	1,600,000
Available-for-sale investment securities, at fair value	3,205,238	3,773,226
Held-to-maturity investment security, at cost (fair value of $160,135 in 2016)	160,135	0
Loans held for sale	28,795	31,958
Loans held-for-investment (net of allowance for loan losses of $260,238 in 2016 and $264,959 in 2015)	23,494,126	23,378,789
Investment in Federal Home Loan Bank (“FHLB”) stock, at cost	18,157	28,770
Investment in Federal Reserve Bank stock, at cost	55,079	54,932
Investments in qualified affordable housing partnerships, net	186,999	193,978
Premises and equipment (net of accumulated depreciation of $103,814 in 2016 and $100,060 in 2015)	165,234	166,993
Goodwill	469,433	469,433
Other assets	955,128	992,040
TOTAL	33,109,169	32,350,922
Customer deposits:
Noninterest-bearing	9,461,568	8,656,805
Interest-bearing	19,134,679	18,819,176
Total deposits	28,596,247	27,475,981
Short-term borrowings	10,093	0
FHLB advances	319,973	1,019,424
Securities sold under repurchase agreements (“repurchase agreements”)	200,000	0
Long-term debt	201,102	206,084
Accrued expenses and other liabilities	564,973	526,483
Total liabilities	$ 29,892,388	$ 29,227,972
COMMITMENTS AND CONTINGENCIES (Note 10)
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 164,496,260 and 164,246,517 shares issued in 2016 and 2015, respectively.	$ 164	$ 164
Additional paid-in capital	1,706,856	1,701,295
Retained earnings	1,951,035	1,872,594
Treasury stock at cost — 20,432,509 shares in 2016 and 20,337,284 shares in 2015.	(439,216)	(436,162)
Accumulated other comprehensive loss (“AOCI”), net of tax	(2,058)	(14,941)
Total stockholders’ equity	3,216,781	3,122,950
TOTAL	$ 33,109,169	$ 32,350,922

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Held-to-maturity investment security, fair value	$ 160,135	$ 0
Allowance for loan losses	260,238	264,959
Premises and equipment, accumulated depreciation	$ 103,814	$ 100,060
STOCKHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	164,496,260	164,246,517
Treasury stock, shares	20,432,509	20,337,284

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees	$ 253,542	$ 241,566
Investment securities	11,193	10,184
Resale agreements	6,677	4,849
Investment in FHLB and Federal Reserve Bank stock	795	1,236
Due from banks and short-term investments	3,965	5,426
Total interest and dividend income	276,172	263,261
INTEREST EXPENSE
Customer deposits	19,297	16,963
Short-term borrowings	9	0
FHLB advances	1,500	1,033
Repurchase agreements	1,926	8,406
Long-term debt	1,236	1,142
Total interest expense	23,968	27,544
Net interest income before provision for credit losses	252,204	235,717
Provision for credit losses	1,440	4,987
Net interest income after provision for credit losses	250,764	230,730
NONINTEREST INCOME
Branch fees	10,222	9,384
Letters of credit fees and foreign exchange income	9,553	8,706
Ancillary loan fees	3,577	2,656
Wealth management fees	3,051	5,179
Derivative commission income	3,466	5,306
Changes in FDIC indemnification asset and receivable/payable	0	(8,422)
Net gains on sales of loans	1,927	9,551
Net gains on sales of available-for-sale investment securities	3,842	4,404
Other fees and operating income	4,875	7,362
Total noninterest income	40,513	44,126
NONINTEREST EXPENSE
Compensation and employee benefits	71,837	64,253
Occupancy and equipment expense	14,415	15,443
Amortization of tax credit and other investments	14,155	6,299
Amortization of premiums on deposits acquired	2,104	2,391
Deposit insurance premiums and regulatory assessments	5,418	5,656
Deposit related expenses	2,207	2,238
Other real estate owned (“OREO”) expense (income)	528	(1,026)
Legal expense	3,007	6,870
Data processing	2,688	2,617
Consulting expense	8,452	2,431
Other operating expense	21,795	20,858
Total noninterest expense	146,606	128,030
INCOME BEFORE INCOME TAXES	144,671	146,826
INCOME TAX EXPENSE	37,155	46,799
NET INCOME	$ 107,516	$ 100,027
EARNINGS PER SHARE (“EPS”)
BASIC (in dollars per share)	$ 0.75	$ 0.70
DILUTED (in dollars per share)	$ 0.74	$ 0.69
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC (in shares)	143,958	143,655
DILUTED (in shares)	144,803	144,349
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.2	$ 0.2

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 107,516	$ 100,027
Other comprehensive income, net of tax:
Net change in unrealized gains on available-for-sale investment securities	12,916	9,318
Foreign currency translation adjustments	(33)	0
Other comprehensive income	12,883	9,318
COMPREHENSIVE INCOME	$ 120,399	$ 109,345

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Common Stock and Additional Paid-In Capital	Retained Earnings	Treasury Stock	AOCI, net of tax
BALANCE (in shares) at Dec. 31, 2014		143,582,229
BALANCE at Dec. 31, 2014	$ 2,856,111		$ 1,677,931	$ 1,604,141	$ (430,198)	$ 4,237
Increase (Decrease) in Stockholders' Equity
Net income	100,027			100,027
Other comprehensive income	9,318					9,318
Stock compensation costs	3,954		3,954
Tax benefit from stock compensation plans, net	3,145		3,145
Net activity of common stock pursuant to various stock compensation plans and agreements (in shares)		238,320
Net activity of common stock pursuant to various stock compensation plans and agreements	(4,858)		833		(5,691)
Common stock dividends	(28,934)			(28,934)
BALANCE (in shares) at Mar. 31, 2015		143,820,549
BALANCE at Mar. 31, 2015	2,938,763		1,685,863	1,675,234	(435,889)	13,555
BALANCE (in shares) at Dec. 31, 2015		143,909,233
BALANCE at Dec. 31, 2015	3,122,950		1,701,459	1,872,594	(436,162)	(14,941)
Increase (Decrease) in Stockholders' Equity
Net income	107,516			107,516
Other comprehensive income	12,883					12,883
Stock compensation costs	4,575		4,575
Tax benefit from stock compensation plans, net	986		986
Net activity of common stock pursuant to various stock compensation plans and agreements (in shares)		154,518
Net activity of common stock pursuant to various stock compensation plans and agreements	(3,054)		0		(3,054)
Common stock dividends	(29,075)			(29,075)
BALANCE (in shares) at Mar. 31, 2016		144,063,751
BALANCE at Mar. 31, 2016	$ 3,216,781		$ 1,707,020	$ 1,951,035	$ (439,216)	$ (2,058)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 107,516	$ 100,027
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,613	17,422
(Accretion) of discount and amortization of premiums, net	(15,855)	(18,600)
Changes in FDIC indemnification asset and receivable/payable	0	8,422
Stock compensation costs	4,575	3,954
Deferred tax expenses	3,718	3
Tax benefit from stock compensation plans, net	(986)	(3,145)
Provision for credit losses	1,440	4,987
Net gains on sales of loans	(1,927)	(9,551)
Net gains on sales of available-for-sale investment securities	(3,842)	(4,404)
Net gains on sales of OREO and premises and equipment	(193)	(3,833)
Originations and purchases of loans held for sale	(1,403)	0
Proceeds from sales and paydowns/payoffs in loans held for sale	2,229	457
Net payments to FDIC shared-loss agreements	0	(1,810)
Net change in accrued interest receivable and other assets	2,057	5,980
Net change in accrued expenses and other liabilities	57,957	26,413
Other net operating activities	(349)	(784)
Total adjustments	76,034	25,511
Net cash provided by operating activities	183,550	125,538
Net (increase) decrease in:
Loans receivable	(29,342)	(273,715)
Short-term investments	(3,531)	13,364
Investments in qualified affordable housing partnerships, tax credit and other investments	(8,390)	(20,861)
Purchases of:
Resale agreements	(1,000,000)	(725,000)
Available-for-sale investment securities	(223,873)	(517,477)
Loans receivable (including loan participations)	(375,783)	(182,088)
Proceeds from sales of:
Available-for-sale investment securities	652,753	180,501
Loans receivable	151,832	679,775
Paydowns and maturities of resale agreements	1,000,000	300,000
Repayments, maturities and redemptions of available-for-sale investment securities	158,268	138,422
Redemption of FHLB stock	10,614	2,636
Other net investing activities	(2,022)	7,168
Net cash provided by (used in) investing activities	330,526	(397,275)
Net increase in:
Deposits	1,116,272	1,154,059
Short-term borrowings	9,962	0
Proceeds from:
Issuance of common stock pursuant to various stock plans and agreements	0	833
Payments for:
Repayment of FHLB advances	(700,000)	0
Repayment of long-term debt	(5,000)	(5,000)
Repurchase of vested shares due to employee tax liability	(3,054)	(5,691)
Cash dividends	(29,325)	(29,295)
Tax benefit from stock compensation plans, net	986	3,145
Net cash provided by financing activities	389,841	1,118,051
Effect of exchange rate changes on cash and cash equivalents	493	0
NET INCREASE IN CASH AND CASH EQUIVALENTS	904,410	846,314
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,360,887	1,039,885
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,265,297	1,886,199
Cash paid during the period for:
Interest	24,309	26,707
Income tax (refunds) payments	(28,509)	18,458
Noncash investing and financing activities:
Loans transferred to loans held for sale, net	308,722	820,473
Transfers to OREO	51	3,828
Held-to-maturity investment security retained from securitization of loans	160,135	0
Dividends payable	$ 250	$ 361

BASIS OF PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	NOTE 1 — BASIS OF PRESENTATION The unaudited interim Consolidated Financial Statements in this Form 10-Q include the accounts of East West and its subsidiaries, East West Bank and subsidiaries (referred to herein as “East West Bank” or the “Bank”) and East West Insurance Services, Inc. Intercompany transactions and balances have been eliminated in consolidation. As of March 31, 2016 , East West has six wholly-owned subsidiaries that are statutory business trusts (the “Trusts”). In accordance with FASB Accounting Standards Codification (“ASC”) Topic 810, the Trusts are not consolidated into the Company. The unaudited interim Consolidated Financial Statements presented in accordance with United States Generally Accepted Accounting Principles (“U.S. GAAP”), applicable guidelines prescribed by regulatory authorities, and general practices within the banking industry, reflect all adjustments that, in the opinion of management, are necessary for fair statement of the interim period financial statements. Certain prior year balances and notes have been reclassified to conform to current period presentation. The current period’s results of operations are not necessarily indicative of results that may be expected for any other interim period or for the year as a whole. Events subsequent to the Consolidated Balance Sheet date have been evaluated through the date the financial statements are issued for inclusion in the accompanying financial statements. The unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto, included in the Company’s 2015 Form 10-K.

CURRENT ACCOUNTING DEVELOPMENTS

CURRENT ACCOUNTING DEVELOPMENTS	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
CURRENT ACCOUNTING DEVELOPMENTS	NOTE 2 — CURRENT ACCOUNTING DEVELOPMENTS NEW ACCOUNTING PRONOUNCEMENTS ADOPTED In February 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis that changes the analysis a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The amended guidance 1) modifies the evaluation of whether limited partnerships and similar legal entities are VIEs or voting interest entities; 2) eliminates the presumption that a general partner should consolidate a limited partnership; 3) affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships; and 4) provides a scope exception from consolidation guidance for reporting entities that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a7 of the Investment Company Act of 1940 for registered money market funds. The Company adopted this amended guidance in the first quarter of 2016 and the adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 simplifies the presentation of debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts. The Company adopted this guidance retrospectively in the first quarter of 2016. The adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. In April 2015, the FASB issued ASU 2015-05, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 amends ASC 350-40 and requires the Company to determine whether a cloud computing arrangement contains a software license. If the arrangement contains a software license, the Company should account for the fees related to the software license element consistent with how the acquisitions of other software licenses are accounted for under ASC 350-40. If the arrangement does not contain a software license, the Company should account for the arrangement as a service contract. The Company adopted this guidance prospectively to all arrangements entered into or materially modified in the first quarter of 2016. The adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. RECENT ACCOUNTING PRONOUNCEMENTS In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) . The new guidance replaces existing revenue recognition guidance for contracts to provide goods or services to customers and amends existing guidance related to recognition of gains and losses on the sale of certain nonfinancial assets such as real estate. ASU 2014-09 establishes a principles-based approach to recognizing revenue that applies to all contracts other than those covered by other authoritative U.S. GAAP guidance. Quantitative and qualitative disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows are also required. Further in March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) , to amend the principal versus agent guidance in the new revenue standard. ASU 2014-09 and ASU 2015-09 are effective for interim and annual periods beginning after December 15, 2017 and are applied on either a modified retrospective or full retrospective basis. Early adoption is not permitted. The Company is currently evaluating the impact on its Consolidated Financial Statements. In January 2016, the FASB issued ASU 2016-01, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires equity investments, except those accounted for under the equity method of accounting or consolidated, to be measured at fair value with changes recognized in net income. If there is no readily determinable fair value, the guidance allows entities the ability to measure investments at cost less impairment, whereby impairment is based on a qualitative assessment. The guidance eliminates the requirement to disclose the methods and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost and changes the presentation of financial assets and financial liabilities on the balance sheet or in the footnotes. If an entity has elected the fair value option to measure liabilities, the new accounting guidance requires the portion of the change in the fair value of a liability resulting from credit risk to be presented in other comprehensive income. The Company has not elected to measure any of its liabilities at fair value. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is not permitted except for certain specific changes under the fair value option guidance. To adopt the amendments, the Company is required to make a cumulative-effect adjustment to the consolidated balance sheet as of the beginning of the fiscal year in which the guidance is effective. However, the amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the adoption date. The Company is currently evaluating the impact on its Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which is intended to increase transparency and comparability in the accounting for lease transactions. ASU 2016-02 requires lessees to recognize all leases longer than twelve months on the consolidated balance sheet as lease assets and lease liabilities and quantitative and qualitative disclosures regarding key information about leasing arrangements. Lessor accounting is largely unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years with an option to early adopt. The Company is currently evaluating the impact on its Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships , to clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument in an existing hedging relationship would not be considered a termination of the derivative instrument or a change in a critical term of the hedging relationship provided that all other hedge accounting criteria in ASC 815 continue to be met. This clarification applies to both cash flow and fair value hedging relationships. ASU 2016-05 is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years with an option to early adopt. The Company has an option to adopt the amendments of this ASU either on a prospective basis or modified retrospective basis. The Company does not expect the adoption of this guidance to have a material impact on its Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-07, Investments—Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting, to eliminate the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. The amendments in ASU 2016-07 also require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in AOCI at the date the investment becomes qualified for use of the equity method. ASU 2016-07 is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years and should be applied prospectively. Early adoption is not permitted. The Company is currently evaluating the impact on its Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, to simplify several aspects of the accounting for share-based payment transactions, including the accounting for income taxes, forfeitures, statutory tax withholding requirements, as well as classification in the statement of cash flows. ASU 2016-09 also eliminated certain guidance in ASC 718 on when awards cease to be within the scope of ASC 718 and instead become subject to other U.S. GAAP requirements. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact on its Consolidated Financial Statements.

FAIR VALUE MEASUREMENT AND FAIR

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS	NOTE 3 — FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS In determining fair value, the Company uses various methods including market and income approaches. Based on these approaches, the Company utilizes certain assumptions that market participants would use in pricing the asset or liability. These inputs can be readily observable, market corroborated, or generally unobservable. The Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy noted below is based on the quality and reliability of the information used to determine fair value. The fair value hierarchy gives the highest priority to quoted prices available in active markets and the lowest priority to data lacking transparency. The fair value of the Company’s assets and liabilities is classified and disclosed in one of the following three categories: • Level 1 — Valuation is based on quoted prices for identical instruments traded in active markets. • Level 2 — Valuation is based on quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable and can be corroborated by market data. • Level 3 — Valuation is based on significant unobservable inputs for determining the fair value of assets or liabilities. These significant unobservable inputs reflect assumptions that market participants may use in pricing the assets or liabilities. In determining the appropriate hierarchy levels, the Company performs an analysis of the assets and liabilities that are subject to fair value disclosure. The Company’s assets and liabilities are classified in their entirety based on the lowest level of input that is significant to their fair value measurements. The following tables present financial assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2016 and December 31, 2015 : Assets (Liabilities) Measured at Fair Value on a Recurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available-for-sale investment securities: U.S. Treasury securities $ 516,755 $ 516,755 $ — $ — U.S. government agency and U.S. government sponsored enterprise debt securities 788,935 — 788,935 — U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 326,987 — 326,987 — Residential mortgage-backed securities 935,099 — 935,099 — Municipal securities 159,426 — 159,426 — Non-agency residential mortgage-backed securities: Investment grade 59,899 — 59,899 — Corporate debt securities: Investment grade 365,905 — 365,905 — Non-investment grade 7,924 — 7,924 — Other securities 44,308 36,212 8,096 — Total available-for-sale investment securities $ 3,205,238 $ 552,967 $ 2,652,271 $ — Derivative assets: Interest rate swaps on certificates of deposit $ 54 $ — $ 54 $ — Interest rate swaps and options $ 129,599 $ — $ 129,599 $ — Foreign exchange contracts $ 8,817 $ — $ 8,817 $ — Derivative liabilities: Interest rate swaps on certificates of deposit $ (1,038 ) $ — $ (1,038 ) $ — Foreign currency forward contracts $ (430 ) $ — $ (430 ) $ — Interest rate swaps and options $ (130,420 ) $ — $ (130,420 ) $ — Foreign exchange contracts $ (6,196 ) $ — $ (6,196 ) $ — Credit risk participation agreements (“RPAs”) $ (11 ) $ — $ (11 ) $ — Assets (Liabilities) Measured at Fair Value on a Recurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Significant Significant Unobservable Inputs (Level 3) Available-for-sale investment securities: U.S. Treasury securities $ 998,515 $ 998,515 $ — $ — U.S. government agency and U.S. government sponsored enterprise debt securities 768,849 — 768,849 — U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 351,662 — 351,662 — Residential mortgage-backed securities 997,396 — 997,396 — Municipal securities 175,649 — 175,649 — Non-agency residential mortgage-backed securities: Investment grade 62,393 — 62,393 — Corporate debt securities: Investment grade 364,713 — 364,713 — Non-investment grade 9,642 — 9,642 — Other securities 44,407 35,635 8,772 — Total available-for-sale investment securities $ 3,773,226 $ 1,034,150 $ 2,739,076 $ — Derivative assets: Foreign currency forward contracts $ 2,365 $ — $ 2,365 $ — Interest rate swaps and options $ 67,215 $ — $ 67,215 $ — Foreign exchange contracts $ 10,254 $ — $ 10,254 $ — Derivative liabilities: Interest rate swaps on certificates of deposit $ (5,213 ) $ — $ (5,213 ) $ — Interest rate swaps and options $ (67,325 ) $ — $ (67,325 ) $ — Foreign exchange contracts $ (9,350 ) $ — $ (9,350 ) $ — RPAs $ (4 ) $ — $ (4 ) $ — At each reporting period, all assets and liabilities for which the fair value measurement is based on significant unobservable inputs are classified as Level 3. There were no assets or liabilities measured using significant unobservable inputs (Level 3) on a recurring basis for the three months ended March 31, 2016 . The following table presents a reconciliation of the beginning and ending balances for major asset and liability categories measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2015 : ($ in thousands) Three Months Ended March 31, 2015 Corporate Debt Grade Embedded Derivative Beginning balance $ 6,528 $ (3,392 ) Total gains (losses) for the period: Included in earnings (1) 960 (20 ) Included in other comprehensive income (2) 922 — Sales and settlements: Sales (7,219 ) — Settlements (98 ) — Transfers in and/or out of Level 3 (1,093 ) — Ending balance $ — $ (3,412 ) Change in unrealized losses included in earnings relating to assets and liabilities held for the period $ — $ (20 ) (1) Net gains or losses (realized and unrealized) of corporate debt securities and embedded derivative liabilities are included in Net gains on sales of available-for-sale investment securities and Other operating expense , respectively, in the Consolidated Statements of Income. (2) Unrealized gains or losses on available-for-sale investment securities are reported in Other comprehensive income, net of tax , in the Consolidated Statements of Comprehensive Income. Transfers into or out of fair value hierarchy classifications are made if the significant inputs used in the financial models measuring the fair values of the assets and liabilities become unobservable or observable in the current marketplace. The Company’s policy, with respect to transfers between levels of the fair value hierarchy, is to recognize transfers into and out of each level as of the end of the reporting period. There were no transfers of assets measured on a recurring basis in and out of Level 1, Level 2, or Level 3 for the three months ended March 31, 2016 . During the three months ended March 31, 2015 , the Company transferred $1.1 million of pooled trust preferred securities measured on a recurring basis out of Level 3 into Level 2 due to increased market liquidity and price observability. Assets measured at fair value on a nonrecurring basis include certain non-purchased credit impaired (“non-PCI”) loans that were impaired, OREO, and loans held for sale. These fair value adjustments result from impairments recognized during the period on certain non-PCI impaired loans, application of fair value less cost to sell on OREO and application of lower of cost or market (“LOCOM”) valuation on loans held for sale. The following tables present the carrying amounts of all assets that were still held as of March 31, 2016 and December 31, 2015 for which a nonrecurring fair value measurement was recorded: Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Significant Significant Unobservable Inputs (Level 3) Non-PCI impaired loans: Commercial real estate (“CRE”) $ 13,147 $ — $ — $ 13,147 Commercial and industrial (“C&I”) 48,788 — — 48,788 Residential 17,345 — — 17,345 Consumer 1,570 — — 1,570 Total non-PCI impaired loans $ 80,850 $ — $ — $ 80,850 OREO $ 3,490 $ — $ — $ 3,490 Loans held for sale $ 28,795 $ — $ 28,795 $ — Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Significant Significant Unobservable Inputs (Level 3) Non-PCI impaired loans: CRE $ 17,252 $ — $ — $ 17,252 C&I 35,558 — — 35,558 Residential 16,472 — — 16,472 Consumer 1,180 — — 1,180 Total non-PCI impaired loans $ 70,462 $ — $ — $ 70,462 OREO $ 4,929 $ — $ — $ 4,929 Loans held for sale $ 29,238 $ — $ 29,238 $ — The following table presents fair value adjustments of certain assets measured on a nonrecurring basis recognized for the three months ended and still held as of March 31, 2016 and 2015 : Three Months Ended March 31, ($ in thousands) 2016 2015 Non-PCI impaired loans: CRE $ 2,178 $ 841 C&I (1,935 ) (2,470 ) Residential (83 ) (239 ) Consumer 3 — Total non-PCI impaired loans $ 163 $ (1,868 ) OREO $ (461 ) $ (277 ) Loans held for sale $ (2,351 ) $ — The following table presents quantitative information about significant unobservable inputs used in the valuation of assets measured on a nonrecurring basis classified as Level 3 as of March 31, 2016 and December 31, 2015 : ($ in thousands) Fair Value Valuation Unobservable Range of Inputs Weighted March 31, 2016 Non-PCI impaired loans $ 40,719 Discounted cash flow Discount rate 0% - 84% 23% $ 40,131 Market comparables Discount rate (1) 0% - 43% 12% OREO $ 3,490 Appraisal Selling cost 8% 8% December 31, 2015 Non-PCI impaired loans $ 27,522 Discounted cash flow Discount rate 0% - 87% 30% $ 42,940 Market comparables Discount rate (1) 0% - 100% 17% OREO $ 4,929 Appraisal Selling cost 8% 8% (1) Discount rate is adjusted for factors such as liquidation cost of collateral and selling cost. The following tables present the carrying and fair values per the fair value hierarchy of certain financial instruments, excluding those measured at fair value on a recurring basis, as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, 2016 Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Financial assets: Cash and cash equivalents $ 2,265,297 $ 2,265,297 $ — $ — $ 2,265,297 Short-term investments $ 305,548 $ — $ 305,548 $ — $ 305,548 Resale agreements (1) $ 1,800,000 $ — $ 1,571,665 $ — $ 1,571,665 Held-to-maturity investment security $ 160,135 $ — $ — $ 160,135 $ 160,135 Loans held for sale $ 28,795 $ — $ 28,795 $ — $ 28,795 Loans receivable, net $ 23,494,126 $ — $ — $ 23,344,433 $ 23,344,433 Investment in FHLB stock $ 18,157 $ — $ 18,157 $ — $ 18,157 Investment in Federal Reserve Bank stock $ 55,079 $ — $ 55,079 $ — $ 55,079 Accrued interest receivable $ 88,804 $ — $ 88,804 $ — $ 88,804 Financial liabilities: Customer deposit accounts: Demand, savings and money market deposits $ 22,531,531 $ — $ 22,531,531 $ — $ 22,531,531 Time deposits $ 6,064,716 $ — $ 6,063,265 $ — $ 6,063,265 Short-term borrowings $ 10,093 $ — $ 10,093 $ — $ 10,093 FHLB advances $ 319,973 $ — $ 332,474 $ — $ 332,474 Repurchase agreements (1) $ 200,000 $ — $ 271,367 $ — $ 271,367 Accrued interest payable $ 8,507 $ — $ 8,507 $ — $ 8,507 Long-term debt $ 201,102 $ — $ 194,189 $ — $ 194,189 (1) Resale and repurchase agreements are reported net pursuant to ASC 210-20-45, Balance Sheet Offsetting . As of March 31, 2016 , $250.0 million out of $450.0 million of repurchase agreements was eligible for netting against resale agreements. December 31, 2015 ($ in thousands) Carrying Level 1 Level 2 Level 3 Estimated Financial assets: Cash and cash equivalents $ 1,360,887 $ 1,360,887 $ — $ — $ 1,360,887 Short-term investments $ 299,916 $ — $ 299,916 $ — $ 299,916 Resale agreements (1) $ 1,600,000 $ — $ 1,533,961 $ — $ 1,533,961 Loans held for sale $ 31,958 $ — $ 31,958 $ — $ 31,958 Loans receivable, net $ 23,378,789 $ — $ — $ 23,000,817 $ 23,000,817 Investment in FHLB stock $ 28,770 $ — $ 28,770 $ — $ 28,770 Investment in Federal Reserve Bank stock $ 54,932 $ — $ 54,932 $ — $ 54,932 Accrued interest receivable $ 89,243 $ — $ 89,243 $ — $ 89,243 Financial liabilities: Customer deposit accounts: Demand, savings and money market deposits $ 20,859,086 $ — $ 20,859,086 $ — $ 20,859,086 Time deposits $ 6,616,895 $ — $ 6,606,942 $ — $ 6,606,942 FHLB advances $ 1,019,424 $ — $ 1,032,000 $ — $ 1,032,000 Accrued interest payable $ 8,848 $ — $ 8,848 $ — $ 8,848 Long-term debt $ 206,084 $ — $ 186,593 $ — $ 186,593 (1) Resale and repurchase agreements are reported net pursuant to ASC 210-20-45, Balance Sheet Offsetting . As of December 31, 2015, the carrying amount of $450.0 million of repurchase agreements was eligible for netting against resale agreements, resulting in no repurchase agreements’ balances reported. The following is a description of the valuation methodologies and significant assumptions used to measure financial assets and liabilities at fair value and to estimate fair value for certain financial instruments not recorded at fair value. The description also includes the level of the fair value hierarchy in which the assets or liabilities are classified. Cash and Cash Equivalents — The carrying amount approximates fair value due to the short-term nature of these instruments. As such, the estimated fair value is classified as Level 1. Short-Term Investments — The fair value of short-term investments generally approximates their book value due to their short maturities. In addition, due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. Resale Agreements — The fair value of resale agreements is estimated by discounting the cash flows based on expected maturities or repricing dates utilizing estimated market discount rates. In addition, due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. Held-to-Maturity Investment Security — The fair value of a held-to-maturity investment security is determined by the discount cash flow approach. The discount rate is derived from conditional prepayment rate, constant default rate, loss severity and discount margin. Due to the significant unobservable inputs, held-to-maturity investment securities are classified as Level 3. Available-for-Sale Investment Securities — When available, the Company uses quoted market prices to determine the fair value of available-for-sale investment securities; such items are classified as Level 1. Level 1 available-for-sale investment securities mainly include U.S. Treasury securities. The fair values of other available-for-sale investment securities are generally determined by independent external pricing service providers who have experience in valuing these securities or by the average of quoted market prices obtained from independent external brokers. In obtaining such valuation information from third parties, the Company has reviewed the methodologies used to develop the resulting fair values. The available-for-sale investment securities valued using such methods are classified as Level 2. Loans Held for Sale — The Company’s loans held for sale are carried at the LOCOM. These loans are comprised of student loans. The fair value of loans held for sale is derived from current market prices and comparative current sales. As such, the Company records any fair value adjustments on a nonrecurring basis. Loans held for sale are classified as Level 2. Non-PCI Impaired Loans — The Company evaluates non-PCI impaired loans on a nonrecurring basis. The fair value of non-PCI impaired loans is measured using the market comparable technique. For CRE loans and C&I loans, the fair value is based on each loan’s observable market price or the fair value of the collateral less cost to sell, if the loan is collateral dependent. The fair value of collateral is based on third party appraisals or evaluations which are reviewed by the Company’s appraisal department. All appraisals include an “as is” market value without conditions as of the effective date of the appraisal. Updated appraisals and evaluations are generally obtained within the last 12 months . For certain impaired loans, the Company utilizes the discounted cash flow approach and applies a discount rate derived from historical data. For impaired loans with an unpaid balance below a certain threshold, the Company applies historical loss rates to derive the fair value. The significant unobservable inputs used in the fair value measurement of non-PCI impaired loans are discount rates applied based on the liquidation cost of collateral and selling cost. On a quarterly basis, all nonperforming assets are reviewed to assess whether the current carrying value is supported by the collateral or cash flow and to ensure that the current carrying value is appropriate. Non-PCI impaired loans are classified as Level 3. Loans Receivable, Net — The fair value of loans is determined based on a discounted cash flow approach considered for an exit price value. The discount rate is derived from the associated yield curve plus spreads that reflect the rates in the market for loans with similar financial characteristics. No adjustments have been made for changes in credit within any of the loan portfolios. It is management’s opinion that the allowance for loan losses pertaining to performing and nonperforming loans results in a fair value valuation of credit for such loans. Due to the unobservable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 3. OREO — The Company’s OREO represents properties acquired through foreclosure or through full or partial satisfaction of loans receivable, which are recorded at estimated fair value less the cost to sell at the time of foreclosure and at the lower of cost or estimated fair value less the cost to sell subsequent to acquisition. The fair values of OREO properties are based on third party appraisals, broker price opinions or accepted written offers. Please refer to the Non-PCI Impaired Loans section above for a detailed discussion on the Company’s policies and procedures related to appraisals and evaluations. On a monthly basis, the current fair market value of each OREO property is reviewed to ensure that the current carrying value is appropriate. The Company uses the market comparable valuation technique to measure the fair value of OREO properties. The significant unobservable input used is the selling cost. OREO properties are classified as Level 3. Investment in FHLB Stock and Federal Reserve Bank Stock — The carrying amounts of the Company’s investments in FHLB Stock and Federal Reserve Bank Stock approximate fair value. The valuation of these investments is classified as Level 2. Ownership of these securities is restricted to member banks and the securities do not have a readily determinable fair value. Purchases and sales of these securities are at par value. Accrued Interest Receivable — The carrying amount approximates fair value due to the short-term nature of these instruments. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. Interest Rate Swaps and Options — The Company enters into interest rate swap and option contracts with institutional counterparties to hedge against interest rate swap and option products offered to bank customers. These products allow borrowers to lock in attractive intermediate and long-term interest rates by entering into an interest rate swap or option contract with the Company, resulting in the customer obtaining a synthetic fixed rate loan. The Company also enters into interest rate swap contracts with institutional counterparties to hedge against certificates of deposit issued. This product allows the Company to lock in attractive floating rate funding. The fair value of interest rate swaps is determined using the market standard methodology of netting the discounted future fixed cash payments (or receipts) and the discounted expected variable cash receipts (or payments). The variable cash receipts (or payments) are based on the expectation of future interest rates (forward curves) derived from observed market interest rate curves. The fair value of interest rate options is determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates fell below (rise above) the strike rate of the floors (caps). The variable interest rates used in the calculation of projected receipts on the floor (cap) are based on an expectation of future interest rates derived from observable market interest rate curves and volatilities. In addition, to comply with the provisions of ASC 820, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements of its derivatives. The credit valuation adjustments associated with the Company’s derivatives utilize Level 3 inputs, model-derived credit spreads. As of March 31, 2016 , the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of these interest rate contracts’ positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivative portfolios. As a result, the Company classifies these derivative valuations in Level 2 of the fair value hierarchy due to the observable nature of the significant inputs utilized. Foreign Exchange Contracts — The Company enters into short-term foreign exchange contracts to purchase/sell foreign currencies at set rates in the future. These contracts economically hedge against foreign exchange rate fluctuations. The Company also enters into contracts with institutional counterparties to hedge against foreign exchange products offered to bank customers. These products allow customers to hedge the foreign exchange risk of their deposits and loans denominated in foreign currencies. The Company assumes minimal foreign exchange rate risk as the contract with the customer and the institutional party mirror each other. The fair value is determined at each reporting period based on changes in the foreign exchange rate. These are over the counter contracts where quoted market prices are not readily available. Valuation is measured using conventional valuation methodologies with observable market data. Valuation depends on the type of derivative and the nature of the underlying rate and contractual terms including period of maturity, price and index upon which the derivative’s value is based. Key inputs include foreign exchange rates (spot and/or forward rates), volatility of currencies, and the correlation of such inputs. The counterparties’ credit risks are considered nominal and resulted in no adjustments to the valuation of the foreign exchange contracts. Due to the observable nature of the inputs used in deriving the fair value of these contracts, the valuation of foreign contracts is classified as Level 2. Customer Deposits — The fair value of deposits with no stated maturity, such as demand deposits, interest checking, savings, and money market deposits, approximates the carrying amount as the amounts are payable on demand at the measurement date. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. For time deposits, the fair value is based on the discounted value of contractual cash flows using current market rates for instruments with similar maturities. Due to the observable nature of the inputs used in deriving the estimated fair value, time deposits are classified as Level 2. FHLB Advances — The fair value of FHLB advances is estimated based on the discounted value of contractual cash flows, using rates currently offered by the FHLB of San Francisco for advances with similar remaining maturities at each reporting date. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. Repurchase Agreements — The fair value of the repurchase agreements is calculated by discounting future cash flows based on expected maturities or repricing dates, utilizing estimated market discount rates and taking into consideration the call features of each instrument. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. Accrued Interest Payable — The carrying amount approximates fair value due to the short-term nature of these instruments. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. Long-Term Debt — The fair value of long-term debt is estimated by discounting the cash flows through maturity based on current market rates the Company would pay for new issuances. Due to the observable nature of the inputs used in deriving the estimated fair value, long-term debt is classified as Level 2. Foreign currency forward contracts — The Company enters into foreign currency forward contracts to hedge its net investment in East West Bank (China) Limited, a non-U.S. Dollar (“USD”) functional currency subsidiary in China. The fair value of foreign currency forward contracts is valued by comparing the contracted foreign exchange rate to the current market exchange rate. Inputs include spot rates, forward rates, and the interest rate curve of the domestic and foreign currency. Interest rate forward curves are used to determine which forward rate pertains to a specific maturity. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. RPAs — The Company enters into RPAs, under which the Company assumes its pro-rata share of the credit exposure associated with the borrower’s performance related to interest rate derivative contracts. The fair value of RPAs is calculated by determining the total expected liability exposure of the derivatives to the borrowers and applying the borrowers’ credit spread to that exposure. Total expected exposure incorporates both the current and potential future exposure of the derivatives, derived from using observable inputs, such as yield curves and volatilities. The credit spreads of the borrowers used in the calculation are estimated by the Company based on current market conditions, including consideration of current borrowing spreads for similar customers and transactions, review of existing collateralization or other credit enhancements, and changes in credit sector and entity-specific credit information. The Company has determined that the majority of the inputs used to value RPAs fall within Level 2 of the fair value hierarchy. The fair value estimates presented herein are based on pertinent information available to management as of each reporting date. Although the Company is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date, and therefore, current estimates of fair value may differ significantly from the amounts presented herein.

SECURITIES PURCHASED UNDER RESA

SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS	3 Months Ended
	Mar. 31, 2016
RESALE AND REPURCHASE AGREEMENTS
SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS	NOTE 4 — SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS Resale Agreements Resale agreements are recorded at the balances at which the securities were acquired. The market values of the underlying securities collateralizing the related receivable of the resale agreements, including accrued interest, are monitored. Additional collateral may be requested by the Company from the counterparty when deemed appropriate. Gross resale agreements were $2.05 billion as of both March 31, 2016 and December 31, 2015 . The weighted average interest rates were 1.70% and 1.61% as of March 31, 2016 and December 31, 2015 , respectively. Repurchase Agreements Long-term repurchase agreements are accounted for as collateralized financing transactions and recorded at the balances at which the securities were sold. The collateral for these agreements are primarily comprised of U.S. government agency and U.S. government sponsored enterprise debt and mortgage-backed securities. The Company may have to provide additional collateral for the repurchase agreements, as necessary. Gross repurchase agreements were $450.0 million as of March 31, 2016 and December 31, 2015 , respectively. The weighted average interest rates were 2.87% and 2.60% as of March 31, 2016 and December 31, 2015 , respectively. Balance Sheet Offsetting The Company’s resale and repurchase agreements are transacted under legally enforceable master repurchase agreements that provide the Company, in the event of default by the counterparty, the right to liquidate securities held and to offset receivables and payables with the same counterparty. The Company nets resale and repurchase transactions with the same counterparty on the Consolidated Balance Sheets when it has a legally enforceable master netting agreement and the transactions are eligible for netting under ASC 210-20-45. Collateral accepted includes securities that are not recognized on the Consolidated Balance Sheets. Collateral pledged consists of securities that are not netted on the Consolidated Balance Sheets against the related collateralized liability. Collateral accepted or pledged in resale and repurchase agreements with other financial institutions may also be sold or re-pledged by the secured party, but is usually delivered to and held by the third party trustees. The collateral amounts received/posted are limited for presentation purposes to the related recognized asset/liability balance for each counterparty, and accordingly, do not include excess collateral received/pledged. The following tables present resale and repurchase agreements included on the Consolidated Balance Sheets as of March 31, 2016 and December 31, 2015 : ($ in thousands) As of March 31, 2016 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Resale agreements $ 2,050,000 $ (250,000 ) $ 1,800,000 $ — $ (1,797,373 ) (1) $ 2,627 Gross Amounts Gross Amounts Net Amounts of on the Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Repurchase agreements $ 450,000 $ (250,000 ) $ 200,000 $ — $ (200,000 ) (2) $ — ($ in thousands) As of December 31, 2015 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Resale agreements $ 2,050,000 $ (450,000 ) $ 1,600,000 $ — $ (1,593,503 ) (1) $ 6,497 Gross Amounts Gross Amounts Net Amounts of on the Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Repurchase agreements $ 450,000 $ (450,000 ) $ — $ — $ — (2) $ — (1) Represents the fair value of securities the Company has received under resale agreements, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. (2) Represents the fair value of securities the Company has pledged under repurchase agreements, limited for table presentation purposes to the amount of the recognized liability owed to each counterparty. In addition to the amounts included in the table above, the Company also has balance sheet netting related to derivatives, refer to Note 6 — Derivatives to the Consolidated Financial Statements for additional information.

INVESTMENT SECURITIES

INVESTMENT SECURITIES	3 Months Ended
	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES	NOTE 5 — INVESTMENT SECURITIES The following table presents the amortized cost, gross unrealized gains and losses and fair value by major categories of available-for-sale investment securities, which are carried at fair value, and a held-to-maturity investment security, which is carried at amortized cost: ($ in thousands) Amortized Gross Gross Fair As of March 31, 2016 Available-for-sale investment securities: U.S. Treasury securities $ 514,827 $ 2,002 $ (74 ) $ 516,755 U.S. government agency and U.S. government sponsored enterprise debt securities 787,846 1,671 (582 ) 788,935 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 325,071 3,132 (1,216 ) 326,987 Residential mortgage-backed securities 927,989 9,421 (2,311 ) 935,099 Municipal securities 156,327 3,254 (155 ) 159,426 Non-agency residential mortgage-backed securities: Investment grade (1) 58,960 1,015 (76 ) 59,899 Corporate debt securities: Investment grade (1) 368,206 212 (2,513 ) 365,905 Non-investment grade (1) 10,191 — (2,267 ) 7,924 Other securities 44,136 499 (327 ) 44,308 Total available-for-sale investment securities 3,193,553 21,206 (9,521 ) 3,205,238 Held-to-maturity investment security: Non-agency commercial mortgage-backed security 160,135 — — 160,135 Total investment securities $ 3,353,688 $ 21,206 $ (9,521 ) $ 3,365,373 As of December 31, 2015 Available-for-sale investment securities: U.S. Treasury securities $ 1,002,874 $ 33 $ (4,392 ) $ 998,515 U.S. government agency and U.S. government sponsored enterprise debt securities 771,288 555 (2,994 ) 768,849 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 354,418 268 (3,024 ) 351,662 Residential mortgage-backed securities 996,255 7,542 (6,401 ) 997,396 Municipal securities 173,785 2,657 (793 ) 175,649 Non-agency residential mortgage-backed securities: Investment grade (1) 62,133 433 (173 ) 62,393 Corporate debt securities: Investment grade (1) 366,921 132 (2,340 ) 364,713 Non-investment grade (1) 11,491 — (1,849 ) 9,642 Other securities 44,664 124 (381 ) 44,407 Total available-for-sale investment securities $ 3,783,829 $ 11,744 $ (22,347 ) $ 3,773,226 (1) Available-for-sale investment securities rated BBB- or higher by S&P or Baa3 or higher by Moody’s are considered investment grade. Conversely, available-for-sale investment securities rated lower than BBB- by S&P or lower than Baa3 by Moody’s are considered non-investment grade. Classifications are based on the lower credit rating by S&P or Moody’s. Unrealized Losses The following table presents the Company’s investment portfolio’s gross unrealized losses and related fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position: ($ in thousands) Less Than 12 Months 12 Months or More Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses As of March 31, 2016 Available-for-sale investment securities: U.S. Treasury securities $ 60,855 $ (42 ) $ 30,570 $ (32 ) $ 91,425 $ (74 ) U.S. government agency and U.S. government sponsored enterprise debt securities 229,834 (571 ) 9,189 (11 ) 239,023 (582 ) U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 103,881 (826 ) 31,130 (390 ) 135,011 (1,216 ) Residential mortgage-backed securities 255,839 (1,381 ) 45,674 (930 ) 301,513 (2,311 ) Municipal securities 5,917 (31 ) 15,794 (124 ) 21,711 (155 ) Non-agency residential mortgage-backed securities: Investment grade 13,945 (57 ) 6,167 (19 ) 20,112 (76 ) Corporate debt securities: Investment grade 248,730 (976 ) 90,899 (1,537 ) 339,629 (2,513 ) Non-investment grade — — 7,924 (2,267 ) 7,924 (2,267 ) Other securities 7,203 (3 ) 8,676 (324 ) 15,879 (327 ) Total available-for-sale investment securities $ 926,204 $ (3,887 ) $ 246,023 $ (5,634 ) $ 1,172,227 $ (9,521 ) As of December 31, 2015 Available-for-sale investment securities: U.S. Treasury securities $ 907,400 $ (4,250 ) $ 20,282 $ (142 ) $ 927,682 $ (4,392 ) U.S. government agency and U.S. government sponsored enterprise debt securities 541,385 (2,994 ) — — 541,385 (2,994 ) U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 252,340 (2,562 ) 20,793 (462 ) 273,133 (3,024 ) Residential mortgage-backed securities 535,842 (4,530 ) 58,315 (1,871 ) 594,157 (6,401 ) Municipal securities 48,495 (437 ) 14,739 (356 ) 63,234 (793 ) Non-agency residential mortgage-backed securities: Investment grade 5,123 (1 ) 6,242 (172 ) 11,365 (173 ) Corporate debt securities: Investment grade 218,944 (1,189 ) 89,989 (1,151 ) 308,933 (2,340 ) Non-investment grade — — 9,642 (1,849 ) 9,642 (1,849 ) Other securities 17,990 (112 ) 8,731 (269 ) 26,721 (381 ) Total available-for-sale investment securities $ 2,527,519 $ (16,075 ) $ 228,733 $ (6,272 ) $ 2,756,252 $ (22,347 ) For each reporting period, the Company examines all individual securities that are in an unrealized loss position for OTTI. For discussion of the factors and criteria the Company uses in analyzing securities for OTTI, please see Note 1 — Summary of Significant Accounting Policies t o the Consolidated Financial Statements of the Company’s 2015 Form 10-K. The unrealized losses on U.S. Treasury and agency securities were primarily attributed to yield curve movement. The unrealized losses on other investment securities, other than U.S. Treasury and agency securities, were primarily attributed to the widened liquidity spread and credit spread in addition to yield curve movement. The issuers of these securities have not, to the Company’s knowledge, established any cause for default on these securities. These securities have fluctuated in value since their purchase dates as market interest rates have fluctuated. The Company believes the gross unrealized losses detailed in the tables above are temporary and are not due to reasons of credit quality. As a result, the Company expects to recover the entire amortized cost basis of these securities. Accordingly, no impairment loss has been recorded in the Company’s Consolidated Statements of Income for the three months ended March 31, 2016 and 2015. During the three months ended March 31, 2016, the Company obtained a non-agency mortgage-backed held-to-maturity investment security, which is measured at amortized cost, through a securitization of multifamily real estate loans. The Company has the intent and ability to hold the security to maturity. For detailed discussion, please refer to Note 7 — Loans Receivable And Allowance For Credit Losses to the Consolidated Financial Statements. OTTI The following table presents a rollforward of the amounts related to the OTTI credit losses recognized in earnings for the three months ended March 31, 2016 and 2015: ($ in thousands) Three Months Ended March 31, 2016 2015 Beginning balance $ — $ 112,338 Addition of OTTI previously not recognized — — Additional increase to the amount related to the credit loss for which an OTTI was previously recognized — — Reduction for securities sold — (5,650 ) Ending balance $ — $ 106,688 No OTTI credit losses were recognized for the three months ended March 31, 2016 and 2015 . For the three months ended March 31, 2015 , the Company realized a gain of $960 thousand from the sale of a non-investment grade corporate debt security with previously recognized OTTI credit losses of $5.7 million . Realized Gains and Losses The following table presents the proceeds, gross realized gains and losses related to the sales of available-for-sale investment securities for the three months ended March 31, 2016 and 2015: ($ in thousands) Three Months Ended March 31, 2016 2015 Proceeds from sales $ 652,753 $ 180,501 Gross realized gains $ 3,967 $ 4,404 Gross realized losses $ 125 $ — Related tax expense $ 1,614 $ 1,850 There were no sales of held-to-maturity investment securities for the three months ended March 31, 2016 and 2015. Scheduled Maturities of Investment Securities The following table presents the scheduled maturities of available-for-sale investment securities as of March 31, 2016 : ($ in thousands) Amortized Cost Estimated Fair Value Due within one year $ 821,310 $ 819,156 Due after one year through five years 712,823 718,395 Due after five years through ten years 380,657 380,493 Due after ten years 1,278,763 1,287,194 Total available-for-sale investment securities $ 3,193,553 $ 3,205,238 The following table presents the scheduled maturity of the held-to-maturity investment security as of March 31, 2016 : ($ in thousands) Amortized Cost Estimated Fair Value Due after ten years $ 160,135 $ 160,135 Actual maturities of mortgage-backed securities can differ from contractual maturities because borrowers have the right to prepay obligations. In addition, such factors as prepayments and interest rates may affect the yields on the carrying values of mortgage-backed securities. Available-for-sale investment securities with fair values of $1.11 billion and $873.0 million as of March 31, 2016 and December 31, 2015 , respectively, were pledged to secure public deposits, repurchase agreements, the Federal Reserve Bank’s discount window, and for other purposes required or permitted by law.

DERIVATIVES

DERIVATIVES	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	NOTE 6 — DERIVATIVES The Company uses derivatives to manage exposure to market risk, including interest rate risk and foreign currency risk and to assist customers with their risk management objectives. The Company’s goal is to manage interest rate sensitivity and volatility so that movements in interest rates are not significant to earnings or capital. The Company also uses foreign exchange contracts to manage the foreign exchange risk associated with certain foreign currency-denominated assets and liabilities, as well as the Company’s investment in East West Bank (China) Limited, a non-USD functional currency subsidiary in China. The Company recognizes all derivatives on the Consolidated Balance Sheets at fair value. While the Company designates certain derivatives as hedging instruments in a qualifying hedge accounting relationship, other derivatives consist of economic hedges. For additional information on the Company’s derivatives and hedging activities, please see Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements of the Company’s 2015 Form 10-K. The following table presents the total notional and fair values of the Company’s derivatives as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, 2016 December 31, 2015 Notional Amount Fair Value Notional Amount Fair Value Derivative Assets (1) Derivative Liabilities (1) Derivative Assets (1) Derivative Liabilities (1) Derivatives designated as hedging instruments: Interest rate swaps on certificates of deposit $ 73,496 $ 54 $ 1,038 $ 112,913 $ — $ 5,213 Foreign currency forward contracts 85,451 — 430 86,590 2,365 — Total derivatives designated as hedging instruments $ 158,947 $ 54 $ 1,468 $ 199,503 $ 2,365 $ 5,213 Derivatives not designated as hedging instruments: Interest rate swaps and options $ 6,685,066 $ 129,599 $ 130,420 $ 6,494,900 $ 67,215 $ 67,325 Foreign exchange contracts 724,894 8,817 6,196 652,993 10,254 9,350 RPAs 42,096 — 11 43,033 — 4 Total derivatives not designated as hedging instruments $ 7,452,056 $ 138,416 $ 136,627 $ 7,190,926 $ 77,469 $ 76,679 (1) Derivative assets are included in Other assets in the Consolidated Balance Sheets. Derivative liabilities are included in Accrued expenses and other liabilities and Interest-bearing deposits in the Consolidated Balance Sheets. Derivatives Designated as Hedging Instruments Interest Rate Swaps on Certificates of Deposit — The Company is exposed to changes in the fair value of certain fixed rate certificates of deposit due to changes in the benchmark interest rate, London Interbank Offering Rate. Interest rate swaps designated as fair value hedges involve the receipt of fixed rate amounts from a counterparty in exchange for the Company making variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. The total notional amounts of the interest rate swaps on certificates of deposit were $73.5 million and $112.9 million , as of March 31, 2016 and December 31, 2015 , respectively. The fair value liabilities of the interest rate swaps were $1.0 million and $5.2 million as of March 31, 2016 and December 31, 2015 , respectively. This decrease was primarily due to $39.4 million notional amounts of interest rate swaps on certificates of deposit that were called during the three months ended March 31, 2016 . The following table presents the net gains (losses) recognized in the Consolidated Statements of Income related to derivatives designated as fair value hedges for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Gains (losses) recorded in interest expense: Recognized on interest rate swaps $ 4,229 $ 3,048 Recognized on certificates of deposit (3,356 ) (2,695 ) Net amount recognized on fair value hedges (ineffective portion) $ 873 $ 353 Net Investment Hedges — Consistent with ASC 830-20, Foreign Currency Matters — Foreign Currency Transactions , ASC 815 allows hedging of the foreign currency risk of a net investment in a foreign operation. During the fourth quarter of 2015, the Company entered into foreign currency forward contracts to hedge its investment in East West Bank (China) Limited, a non-USD functional currency subsidiary in China. The hedging instruments designated as net investment hedges, involve hedging the risk of changes in the USD equivalent value of a designated monetary amount of the Company’s net investment in China, against the risk of adverse changes in the foreign currency exchange rate. The Company expects that the hedging instrument will be highly effective in offsetting the changes in the value of the hedged net investment attributable to the hedged risk. The Company recorded the changes in the carrying amount of its China subsidiary in the Foreign Currency Translation Adjustment account within AOCI. Simultaneously, the effective portion of the hedge of this exposure was also recorded in the Foreign Currency Translation Adjustment account and the ineffective portion, if any, was recorded in current earnings. As of March 31, 2016 , the notional amounts and fair values of the foreign currency forward contracts were $85.5 million and a $430 thousand liability, respectively. The following table presents the losses recorded in the Foreign currency translation account within AOCI related to the effective portion of the net investment hedges and ineffectiveness recorded in the Consolidated Statements of Income for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Losses recognized in AOCI on net investment hedges (effective portion) $ 1,485 $ — Losses recognized in Foreign exchange income (ineffective portion) $ 880 $ — Derivatives Not Designated as Hedging Instruments Interest Rate Swaps and Options — The Company enters into interest rate derivatives including interest rate swaps and options with its customers to allow them to hedge against the risk of rising interest rates on their variable rate loans. To economically hedge against the interest rate risks in the products offered to its customers, the Company enters into mirrored interest rate contracts with institutional counterparties. As of March 31, 2016 , the total notional amounts of interest rate swaps and options, including mirrored transactions with institutional counterparties and the Company’s customers totaled $3.34 billion for derivatives that were in an asset valuation position and $3.34 billion for derivatives that were in a liability valuation position. As of December 31, 2015 , the total notional amounts of interest rate swaps and options, including mirrored transactions with institutional counterparties and the Company’s customers totaled $3.25 billion for derivatives that were in an asset valuation position and $3.25 billion for derivatives that were in a liability valuation position. The fair values of interest rate swap and option contracts with institutional counterparties and the Company’s customers amounted to a $129.6 million asset and a $130.4 million liability as of March 31, 2016 . The fair values of interest rate swap and option contracts with institutional counterparties and the Company’s customers amounted to a $67.2 million asset and a $67.3 million liability as of December 31, 2015 . Foreign Exchange Contracts — The Company enters into foreign exchange contracts on a regular basis to economically hedge against foreign exchange rate fluctuations. A majority of these contracts have original maturities of one year or less. As of March 31, 2016 and December 31, 2015 , the notional amounts of short-term foreign exchange contracts were $724.9 million and $653.0 million , respectively. The fair values of the short-term foreign exchange contracts recorded were an $8.8 million asset and a $6.2 million liability as of March 31, 2016 . The fair values of short-term foreign exchange contracts recorded were a $10.3 million asset and a $9.4 million liability as of December 31, 2015 . RPAs — The Company has entered into RPAs under which the Company assumed its pro-rata share of the credit exposure associated with the borrower’s performance related to interest rate derivative contracts. The Company may or may not be a party to the interest rate derivative contract and enters into such RPAs in instances where the Company is a party to the related loan participation agreement with the borrower. The Company will make/receive payments under the RPAs if the borrower defaults on its obligation to perform under the interest rate derivative contract. The Company manages its credit risk on the RPAs by monitoring the credit worthiness of the borrowers, which is based on the normal credit review process. The notional amounts of the RPAs reflect the Company’s pro-rata share of the derivative instrument. As of March 31, 2016 , the notional amounts and the fair values of RPAs purchased were approximately $ 33.5 million and an $ 11 thousand liability, respectively. As of March 31, 2016 , the notional amount of the RPA sold was approximately $ 8.6 million and the fair value of the derivative asset was insignificant. As of December 31, 2015 , the notional amounts and the fair values of RPAs purchased were approximately $33.7 million and a $4 thousand liability, respectively. As of December 31, 2015 , the notional amount of the RPAs sold was approximately $9.3 million and the fair value of the derivative asset was insignificant. Assuming all underlying borrowers referenced in the interest rate derivative contracts defaulted as of March 31, 2016 and December 31, 2015 , the exposures from the RPAs purchased would be $573 thousand and $257 thousand , respectively. As of March 31, 2016 and December 31, 2015 , the weighted average remaining maturities of the outstanding RPAs were 3.0 years and 3.2 years , respectively. Foreign Exchange Options — During 2010, the Company entered into foreign exchange option contracts with major brokerage firms to economically hedge against foreign exchange fluctuations in certain certificates of deposit available to its customers. These certificates of deposit have a term of five years and pay interest based on the performance of the Chinese Renminbi relative to the USD. Under ASC 815, a certificate of deposit that pays interest based on changes in foreign exchange rates is a hybrid instrument with an embedded derivative that must be accounted for separately from the host contract (i.e., the certificate of deposit). In accordance with ASC 815, both the embedded derivative instruments and the freestanding foreign exchange option contracts are recorded at fair value. As of March 31, 2015 , the notional amounts of the foreign exchange options and embedded derivative liabilities were $50.0 million and $47.8 million , respectively. The fair values of the foreign exchange options and the embedded derivative liabilities amounted to a $3.7 million asset and a $3.4 million liability, respectively, as of March 31, 2015 . These instruments expired in the second quarter of 2015 . The following table presents the net gains (losses) recognized on the Company’s Consolidated Statements of Income related to derivatives not designated as hedging instruments for the three months ended March 31, 2016 and 2015 : ($ in thousands) Location in Consolidated Statements of Income Three Months Ended March 31, 2016 2015 Derivatives not designated as hedging instruments: Interest rate swaps and options Other fees and operating income $ (711 ) $ (594 ) Foreign exchange contracts Foreign exchange income 2,828 1,308 RPA Other fees and operating income (11 ) — Foreign exchange options Foreign exchange income — 199 Embedded derivative liabilities Other operating expense — (141 ) Total net income $ 2,106 $ 772 Credit-Risk-Related Contingent Features — Certain over-the-counter derivative contracts of the Company contain early termination provisions that may require the Company to settle any outstanding balances upon the occurrence of a specified credit-risk-related event. These events, which are defined by the existing derivative contracts, primarily relate to downgrades in the event that the credit rating of East West Bank falls below investment grade. In the event that East West Bank’s credit rating is downgraded to below investment grade, no additional collateral would be required to be posted since the liabilities related to such contracts were fully collateralized as of March 31, 2016 and December 31, 2015 . Offsetting of Derivatives The Company has entered into agreements with counterparty financial institutions, which include master netting agreements. However, the Company has elected to account for all derivatives with counterparty institutions on a gross basis. The following tables present gross derivatives on the Consolidated Balance Sheets and the respective collateral received or pledged in the form of other financial instruments, which are generally marketable securities and/or cash. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability (after netting is applied); thus instances of overcollateralization are not shown: ($ in thousands) As of March 31, 2016 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Derivatives $ 6,470 $ — $ 6,470 $ (5,094 ) (1) $ (1,093 ) (2) $ 283 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Derivatives $ 135,938 $ — $ 135,938 $ (5,094 ) (1) $ (130,255 ) (3) $ 589 ($ in thousands) As of December 31, 2015 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Derivatives $ 8,733 $ — $ 8,733 $ (5,293 ) (1) $ (3,068 ) (2) $ 372 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Derivatives $ 78,779 $ — $ 78,779 $ (5,293 ) (1) $ (73,109 ) (3) $ 377 (1) Represents the netting of derivative receivable and payable balances for the same counterparty under enforceable master netting arrangements if the Company has elected to net. (2) Represents $1.1 million and $3.1 million of cash collateral received against derivative assets with the same counterparty that are subject to enforceable master netting arrangements as of March 31, 2016 and December 31, 2015 , respectively. (3) Represents cash and securities pledged against derivative liabilities with the same counterparty that are subject to enforceable master netting arrangements. Includes approximately $39.6 million and $21.1 million of cash collateral posted as of March 31, 2016 and December 31, 2015 , respectively. In addition to the amounts included in the table above, the Company also has balance sheet netting related to resale and repurchase agreements, please refer to Note 4 — Securities Purchased Under Resale Agreements And Sold Under Repurchase Agreements to the Consolidated Financial Statements. Please refer to Note 3 — Fair Value Measurement And Fair Value Of Financial Instruments to the Consolidated Financial Statements for fair value measurement disclosures on derivatives.

LOANS RECEIVABLE AND ALLOWANCE

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES	3 Months Ended
	Mar. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES	NOTE 7 — LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES The Company’s held-for-investment loan portfolio includes originated and purchased loans. Originated and purchased loans with no evidence of credit deterioration at their acquisition date are referred to collectively as non-PCI loans. Purchased credit impaired (“PCI”) loans are purchased loans with evidence of credit deterioration at origination and it is probable at the acquisition date that the Company would be unable to collect all contractually required payments. PCI loans are accounted for under ASC Subtopic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality . The Company has elected to account for PCI loans on a pool level basis in accordance with ASC 310-30 at the time of acquisition. The following table presents the composition of the Company’s non-PCI and PCI loans as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, 2016 December 31, 2015 Non-PCI Loans PCI Loans (1) Total (1) Non-PCI Loans PCI Loans (1) Total (1) CRE: Income producing $ 7,317,991 $ 498,451 $ 7,816,442 $ 6,937,199 $ 541,275 $ 7,478,474 Construction 465,763 1,340 467,103 436,776 1,895 438,671 Land 165,071 2,862 167,933 187,409 6,195 193,604 Total CRE 7,948,825 502,653 8,451,478 7,561,384 549,365 8,110,749 C&I: Commercial business 8,001,280 52,255 8,053,535 8,155,991 57,906 8,213,897 Trade finance 763,495 1,213 764,708 787,800 1,310 789,110 Total C&I 8,764,775 53,468 8,818,243 8,943,791 59,216 9,003,007 Residential: Single-family 2,927,219 176,172 3,103,391 2,877,286 189,633 3,066,919 Multifamily 1,236,722 111,285 1,348,007 1,374,718 148,277 1,522,995 Total residential 4,163,941 287,457 4,451,398 4,252,004 337,910 4,589,914 Consumer 2,023,521 23,263 2,046,784 1,931,828 24,263 1,956,091 Total loans $ 22,901,062 $ 866,841 $ 23,767,903 $ 22,689,007 $ 970,754 $ 23,659,761 Unearned fees, premiums, and discounts, net (13,539 ) — (13,539 ) (16,013 ) — (16,013 ) Allowance for loan losses (259,910 ) (328 ) (260,238 ) (264,600 ) (359 ) (264,959 ) Loans, net $ 22,627,613 $ 866,513 $ 23,494,126 $ 22,408,394 $ 970,395 $ 23,378,789 (1) Loans net of ASC 310-30 discount. The Company’s CRE segment provides financing for income producing properties, construction properties and land. Commercial business and trade finance in the C&I segment provide financing to small and middle market businesses in a wide spectrum of industries. This includes loans for working capital, accounts receivable and inventory lines of credit, Small Business Administration loans, lease financing and financing to international trade companies with trade financial services and products, including letters of credit, revolving lines of credit, import loans, bankers’ acceptances, working capital lines of credit, domestic purchase financing and pre-export financing. The Company’s adjustable rate mortgage (“ARM”) single-family residential loans are comprised primarily of first mortgage loans secured by one -to- four unit residential properties. The Company’s ARM single-family residential loan programs generally have a one -year, three -year or five -year initial fixed period. The Company’s multifamily residential loans are comprised primarily of variable rate loans that have a six -month or three -year initial fixed period. As of March 31, 2016 and December 31, 2015 , consumer loans were comprised primarily of home equity lines of credit. All loans originated are subject to the Company’s underwriting guidelines and loan origination standards. Management believes that the Company’s underwriting criteria and procedures adequately consider the unique risks which may come from these products. The Company conducts a variety of quality control procedures and periodic audits, including review of criteria for lending and legal requirements, to ensure it is in compliance with its origination standards. As of March 31, 2016 and December 31, 2015 , loans totaling $16.37 billion and $15.91 billion , respectively, were pledged to secure borrowings and to provide additional borrowing capacity from the FHLB and the Federal Reserve Bank. Credit Quality Indicators All loans are subject to the Company’s internal and external credit review and monitoring. Loans are risk rated based on an analysis of the current state of the borrower’s credit quality. The analysis of credit quality includes a review of all repayment sources, the borrower’s current payment performance/delinquency, current financial and liquidity status and all other relevant information. For single-family residential loans, payment performance/delinquency is the driving indicator for the risk ratings. Risk ratings are the overall credit quality indicator for the Company and the credit quality indicator utilized for estimating the appropriate allowance for loan losses. The Company utilizes a risk rating system, which can be classified within the following categories: Pass, Watch, Special Mention, Substandard, Doubtful and Loss. The risk ratings reflect the relative strength of the repayment sources. Pass and Watch loans are generally considered to have sufficient sources of repayment in order to repay the loan in full in accordance with all terms and conditions. These borrowers may have some credit risks that require monitoring, but full repayments are expected. Special Mention loans are considered to have potential weaknesses that warrant closer attention by management. Special Mention is considered a transitory grade. If potential weaknesses are resolved, the loan is upgraded to a Pass or Watch grade. If negative trends in the borrower’s financial status or other information indicates that the repayment sources may become inadequate, the loan is downgraded to a Substandard grade. Substandard loans are considered to have well-defined weaknesses that jeopardize the full and timely repayment of the loan. Substandard loans have a distinct possibility of loss, if the deficiencies are not corrected. Additionally, when management has assessed a potential for loss but a distinct possibility of loss is not recognizable, the loan is still classified as Substandard. Doubtful loans have insufficient sources of repayment and a high probability of loss. Loss loans are considered to be uncollectible and of such little value that they are no longer considered bankable assets. These internal risk ratings are reviewed routinely and adjusted based on changes in the borrowers’ financial status and collectability. The following tables present the credit risk rating for non-PCI loans by portfolio segment as of March 31, 2016 and December 31, 2015 : ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total Non-PCI Loans March 31, 2016 CRE: Income producing $ 7,061,501 $ 39,236 $ 217,254 $ — $ 7,317,991 Construction 462,989 2,339 435 — 465,763 Land 150,149 — 14,922 — 165,071 C&I: Commercial business 7,579,392 198,560 199,521 23,807 8,001,280 Trade finance 730,867 9,907 22,721 — 763,495 Residential: Single-family 2,891,346 7,728 28,145 — 2,927,219 Multifamily 1,185,914 1,925 48,883 — 1,236,722 Consumer 2,015,809 2,650 5,062 — 2,023,521 Total $ 22,077,967 $ 262,345 $ 536,943 $ 23,807 $ 22,901,062 ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total Non-PCI Loans December 31, 2015 CRE: Income producing $ 6,672,951 $ 59,309 $ 204,939 $ — $ 6,937,199 Construction 435,112 1,194 470 — 436,776 Land 172,189 — 15,220 — 187,409 C&I: Commercial business 7,794,735 201,280 135,449 24,527 8,155,991 Trade finance 750,144 13,812 23,844 — 787,800 Residential: Single-family 2,841,722 8,134 27,430 — 2,877,286 Multifamily 1,317,550 2,918 54,250 — 1,374,718 Consumer 1,926,418 883 4,527 — 1,931,828 Total $ 21,910,821 $ 287,530 $ 466,129 $ 24,527 $ 22,689,007 The following tables present the credit risk rating for PCI loans by portfolio segment as of March 31, 2016 and December 31, 2015 : ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total PCI Loans March 31, 2016 CRE: Income producing $ 402,651 $ 13,013 $ 82,787 $ — $ 498,451 Construction — — 1,340 — 1,340 Land 2,272 — 590 — 2,862 C&I: Commercial business 46,426 1,185 4,644 — 52,255 Trade finance 1,213 — — — 1,213 Residential: Single-family 170,788 1,013 4,371 — 176,172 Multifamily 97,447 — 13,838 — 111,285 Consumer 21,880 452 931 — 23,263 Total (1) $ 742,677 $ 15,663 $ 108,501 $ — $ 866,841 ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total PCI Loans December 31, 2015 CRE: Income producing $ 440,100 $ 4,987 $ 96,188 $ — $ 541,275 Construction — — 1,895 — 1,895 Land 4,285 — 1,910 — 6,195 C&I: Commercial business 52,212 819 4,875 — 57,906 Trade finance 1,310 — — — 1,310 Residential: Single-family 184,092 1,293 4,248 — 189,633 Multifamily 130,770 — 17,507 — 148,277 Consumer 23,121 452 690 — 24,263 Total (1) $ 835,890 $ 7,551 $ 127,313 $ — $ 970,754 (1) Loans net of ASC 310-30 discount. Nonaccrual and Past Due Loans Non-PCI loans that are 90 or more days past due are generally placed on nonaccrual status. Additionally, non-PCI loans that are not 90 or more days past due but have identified deficiencies are also placed on nonaccrual status. The following tables present the aging analysis on non-PCI loans as of March 31, 2016 and December 31, 2015 : ($ in thousands) Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Nonaccrual Loans Less Than 90 Days Past Due Nonaccrual Loans 90 or More Days Past Due Total Nonaccrual Loans Current Accruing Loans Total Non-PCI Loans March 31, 2016 CRE: Income producing $ 8,580 $ 5,853 $ 14,433 $ 12,939 $ 39,927 $ 52,866 $ 7,250,692 $ 7,317,991 Construction — — — — — — 465,763 465,763 Land 1,849 121 1,970 6,182 — 6,182 156,919 165,071 C&I: Commercial business 5,687 3,531 9,218 56,380 7,984 64,364 7,927,698 8,001,280 Trade finance — — — 8,375 — 8,375 755,120 763,495 Residential: Single-family 5,117 2,683 7,800 2,521 8,850 11,371 2,908,048 2,927,219 Multifamily 6,164 1,097 7,261 5,641 9,149 14,790 1,214,671 1,236,722 Consumer 1,522 619 2,141 3,504 1,174 4,678 2,016,702 2,023,521 Total $ 28,919 $ 13,904 $ 42,823 $ 95,542 $ 67,084 $ 162,626 $ 22,695,613 $ 22,901,062 ($ in thousands) Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Nonaccrual Loans Less Than 90 Days Past Due Nonaccrual Loans 90 or More Days Past Due Total Nonaccrual Loans Current Accruing Loans Total Non-PCI Loans December 31, 2015 CRE: Income producing $ 3,465 $ 25,256 $ 28,721 $ 11,359 $ 17,870 $ 29,229 $ 6,879,249 $ 6,937,199 Construction — — — 14 — 14 436,762 436,776 Land 1,124 — 1,124 277 406 683 185,602 187,409 C&I: Commercial business 1,992 1,185 3,177 50,726 14,009 64,735 8,088,079 8,155,991 Trade finance — — — — — — 787,800 787,800 Residential: Single-family 7,657 2,927 10,584 92 8,634 8,726 2,857,976 2,877,286 Multifamily 6,320 981 7,301 6,486 9,758 16,244 1,351,173 1,374,718 Consumer 2,078 209 2,287 233 1,505 1,738 1,927,803 1,931,828 Total $ 22,636 $ 30,558 $ 53,194 $ 69,187 $ 52,182 $ 121,369 $ 22,514,444 $ 22,689,007 For information on the policy for recording payments received and resuming accrual of interest on non-PCI loans that are placed on nonaccrual status, please see Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements of the Company’s 2015 Form 10-K. PCI loans are excluded from the above aging analysis tables as the Company has elected to account for these loans on a pool level basis in accordance with ASC 310-30 at the time of acquisition. Please refer to the discussion on PCI loans within this note for additional details on interest income recognition. As of March 31, 2016 and December 31, 2015 , PCI loans on nonaccrual status totaled $34.3 million and $37.7 million , respectively. Loans in Process of Foreclosure As of March 31, 2016 and December 31, 2015 , the Company had $15.2 million and $18.0 million , respectively, of recorded investment in consumer mortgage loans secured by residential real estate properties, for which formal foreclosure proceedings were in process according to local requirements of the applicable jurisdictions, which were not included in OREO. Foreclosed residential real estate properties with a carrying amount of $628 thousand were included in total net OREO of $6.1 million as of March 31, 2016 . In comparison, foreclosed residential real estate properties with a carrying amount of $912 thousand were included in total net OREO of $7.0 million as of December 31, 2015 . Troubled Debt Restructurings (“TDRs”) Potential TDRs are individually evaluated and the type of restructuring is selected based on the loan type and the circumstances of the borrower’s financial difficulty in order to maximize the Company’s recovery. A TDR is a modification of the terms of a loan when the Company, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower, it would not otherwise consider. The following tables present the additions to non-PCI TDRs for the three months ended March 31, 2016 and 2015 : ($ in thousands) Loans Modified as TDRs During the Three Months Ended March 31, 2016 Number Pre-Modification Post-Modification (1) Financial (2) CRE: Income producing 2 $ 13,775 $ 13,753 $ — C&I: Commercial business 4 $ 21,614 $ 18,632 $ 97 Trade finance 2 $ 7,901 $ 8,083 $ — Residential: Single-family 1 $ 276 $ 273 $ — Consumer: 1 $ 344 $ 343 $ 1 Loans Modified as TDRs During the Three Months Ended March 31, 2015 ($ in thousands) Number Pre-Modification Post-Modification (1) Financial (2) CRE: Income producing 1 $ 828 $ 833 $ — C&I: Commercial business 1 $ 167 $ 164 $ 32 Residential: Single-family 1 $ 281 $ 281 $ 2 (1) Includes subsequent payments after modification and reflects the balance as of March 31, 2016 and 2015 . (2) The financial impact includes charge-offs and specific reserves recorded at the modification date. The following tables summarize the non-PCI TDR modifications for the three months ended March 31, 2016 and 2015 by modification type: ($ in thousands) Modification Type Principal (1) Principal and Interest (2) Interest Rate Reduction Other Total March 31, 2016 CRE $ 13,725 $ — $ — $ 28 $ 13,753 C&I 19,166 — 3,615 3,934 26,715 Residential 273 — — — 273 Consumer 343 — — — 343 Total $ 33,507 $ — $ 3,615 $ 3,962 $ 41,084 ($ in thousands) Modification Type Principal (1) Principal and Interest (2) Interest Rate Reduction Other Total March 31, 2015 CRE $ — $ 833 $ — $ — $ 833 C&I 164 — — — 164 Residential 281 — — — 281 Consumer — — — — — Total $ 445 $ 833 $ — $ — $ 1,278 (1) Principal modification includes forbearance payments, term extensions and principal deferments that modify the terms of the loan from principal and interest payments to interest payments only. (2) Principal and interest modification includes principal and interest deferments or reductions. Subsequent to restructuring, a TDR that becomes delinquent, generally beyond 90 days, is considered to have defaulted. The following table presents information for loans modified as TDRs within the previous 12 months that have subsequently defaulted during the three months ended March 31, 2016 and 2015 , and are still in default at period end: Loans Modified as TDRs that Subsequently Defaulted During the Three Months Ended March 31, 2016 2015 ($ in thousands) Number of Recorded Number of Recorded C&I: Commercial business 4 $ 954 — $ — The amount of additional funds committed to lend to borrowers whose terms have been modified was $2.5 million as of March 31, 2016 . The amount of additional funds committed to lend to borrowers whose terms have been modified was immaterial as of December 31, 2015 . Impaired Loans The Company’s loans are grouped into heterogeneous and homogeneous (mostly consumer loans) categories. Classified loans in the heterogeneous category are identified and evaluated for impairment on an individual basis. A loan is considered impaired when, based on current information and events, it is probable that the Company will not be able to collect all scheduled payments of principal or interest due in accordance with the original contractual terms. Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate or, as expedient, at the loan’s observable market price or the fair value of the collateral, if the loan is collateral dependent, less costs to sell. When the value of an impaired loan is less than the recorded investment and the loan is classified as nonperforming and uncollectible, the deficiency is charged-off against the allowance for loan losses. Impaired loans exclude the homogeneous consumer loan portfolio, which is evaluated collectively for impairment. The Company’s impaired loans include predominantly non-PCI loans held-for-investment on nonaccrual status and any non-PCI loans modified in a TDR, which may be on accrual or nonaccrual status. The following tables present information on impaired non-PCI loans as of March 31, 2016 and December 31, 2015 : ($ in thousands) Unpaid Principal Balance Recorded Investment With No Allowance Recorded Investment With Allowance Total Recorded Investment Related Allowance March 31, 2016 CRE: Income producing $ 78,858 $ 63,561 $ 7,725 $ 71,286 $ 351 Land 7,062 5,522 1,279 6,801 111 C&I: Commercial business 105,973 31,716 61,401 93,117 16,888 Trade finance 12,425 8,083 4,318 12,401 43 Residential: Single-family 19,759 6,085 12,077 18,162 548 Multifamily 23,968 16,129 6,082 22,211 267 Consumer 1,630 — 1,628 1,628 57 Total $ 249,675 $ 131,096 $ 94,510 $ 225,606 $ 18,265 ($ in thousands) Unpaid Principal Balance Recorded Investment With No Allowance Recorded Investment With Allowance Total Recorded Investment Related Allowance December 31, 2015 CRE: Income producing $ 47,043 $ 24,347 $ 15,720 $ 40,067 $ 3,148 Construction 66 — 14 14 1 Land 1,537 632 683 1,315 118 C&I: Commercial business 81,720 31,045 40,111 71,156 15,993 Trade finance 10,675 — 10,675 10,675 95 Residential: Single-family 16,486 4,401 10,611 15,012 584 Multifamily 25,634 16,944 6,783 23,727 339 Consumer 1,240 — 1,240 1,240 60 Total $ 184,401 $ 77,369 $ 85,837 $ 163,206 $ 20,338 The following table presents the average recorded investment and interest income recognized on non-PCI impaired loans during the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Average Recorded Investment Recognized Interest Income (1) Average Recognized Interest Income (1) CRE: Income producing $ 72,248 $ 391 $ 44,195 $ 141 Construction — — 3,902 — Land 6,908 9 3,438 10 C&I: Commercial business 92,707 369 39,310 202 Trade finance 13,756 66 245 3 Residential: Single-family 18,318 65 15,423 68 Multifamily 22,338 77 26,987 203 Consumer 1,635 16 1,258 12 Total impaired non-PCI loans $ 227,910 $ 993 $ 134,758 $ 639 (1) Includes interest recognized on accruing non-PCI TDRs. Interest payments received on nonaccrual non-PCI loans are reflected as a reduction to principal and not as interest income. Allowance for Credit Losses The following tables present a summary of activities in the allowance for loan losses by portfolio segment for the three months ended March 31, 2016 and 2015 : ($ in thousands) Non-PCI Loans PCI Loans CRE C&I Residential Consumer Total Total Three Months Ended March 31, 2016 Beginning balance $ 81,191 $ 134,597 $ 39,292 $ 9,520 $ 264,600 $ 359 $ 264,959 Provision for (reversal of) loan losses 1,306 4,654 (5,317 ) (226 ) 417 (31 ) 386 Charge-offs (56 ) (5,860 ) (137 ) (1 ) (6,054 ) — (6,054 ) Recoveries 97 686 97 67 947 — 947 Net recoveries (charge-offs) 41 (5,174 ) (40 ) 66 (5,107 ) — (5,107 ) Ending balance $ 82,538 $ 134,077 $ 33,935 $ 9,360 $ 259,910 $ 328 $ 260,238 ($ in thousands) Non-PCI Loans PCI Loans CRE C&I Residential Consumer Total Total Three Months Ended March 31, 2015 Beginning balance $ 72,263 $ 134,598 $ 43,856 $ 10,248 $ 260,965 $ 714 $ 261,679 (Reversal of) provision for loan losses (2,333 ) 5,378 (1,571 ) 664 2,138 (71 ) 2,067 Charge-offs (1,002 ) (6,589 ) (746 ) (463 ) (8,800 ) — (8,800 ) Recoveries 812 527 1,451 2 2,792 — 2,792 Net (charge-offs) recoveries (190 ) (6,062 ) 705 (461 ) (6,008 ) — (6,008 ) Ending balance $ 69,740 $ 133,914 $ 42,990 $ 10,451 $ 257,095 $ 643 $ 257,738 For further information on accounting policies and the methodology used to estimate the allowance for credit losses and loan charge-offs, please see Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements of the Company’s 2015 Form 10-K. The following table presents a summary of activities in the allowance for unfunded credit reserves during the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Beginning balance $ 20,360 $ 12,712 Provision for unfunded credit reserves 1,054 2,920 Ending balance $ 21,414 $ 15,632 The allowance for unfunded credit reserves is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to unfunded credit facilities. The allowance for unfunded credit reserves is included in Accrued expense and other liabilities in the Consolidated Balance Sheets. Please refer to Note 10 — Commitments And Contingencies to the Consolidated Financial Statements for additional information related to unfunded credit reserves. The following tables present the Company’s allowance for loan losses and recorded investments by portfolio segment and impairment methodology as of March 31, 2016 and December 31, 2015 : ($ in thousands) CRE C&I Residential Consumer Total As of March 31, 2016 Allowance for loan losses Individually evaluated for impairment $ 462 $ 16,931 $ 815 $ 57 $ 18,265 Collectively evaluated for impairment 82,076 117,146 33,120 9,303 241,645 Acquired with deteriorated credit quality 314 10 4 — 328 Ending balance $ 82,852 $ 134,087 $ 33,939 $ 9,360 $ 260,238 Recorded investment in loans Individually evaluated for impairment $ 78,087 $ 105,518 $ 40,373 $ 1,628 $ 225,606 Collectively evaluated for impairment 7,870,738 8,659,257 4,123,568 2,021,893 22,675,456 Acquired with deteriorated credit quality (1) 502,653 53,468 287,457 23,263 866,841 Ending balance (1) $ 8,451,478 $ 8,818,243 $ 4,451,398 $ 2,046,784 $ 23,767,903 ($ in thousands) CRE C&I Residential Consumer Total As of December 31, 2015 Allowance for loan losses Individually evaluated for impairment $ 3,267 $ 16,088 $ 923 $ 60 $ 20,338 Collectively evaluated for impairment 77,924 118,509 38,369 9,460 244,262 Acquired with deteriorated credit quality 347 9 3 — 359 Ending balance $ 81,538 $ 134,606 $ 39,295 $ 9,520 $ 264,959 Recorded investment in loans Individually evaluated for impairment $ 41,396 $ 81,831 $ 38,739 $ 1,240 $ 163,206 Collectively evaluated for impairment 7,519,988 8,861,960 4,213,265 1,930,588 22,525,801 Acquired with deteriorated credit quality (1) 549,365 59,216 337,910 24,263 970,754 Ending balance (1) $ 8,110,749 $ 9,003,007 $ 4,589,914 $ 1,956,091 $ 23,659,761 (1) Loans net of ASC 310-30 discount. PCI Loans At the date of acquisition, PCI loans are pooled and accounted for at fair value, which represents the discounted value of the expected cash flows of the loan portfolio. The amount of expected cash flows over the initial investment in the loan represents the “accretable yield,” which is recognized as interest income on a level yield basis over the life of the loan. The excess of total contractual cash flows over the cash flows expected to be received at origination is deemed as the “nonaccretable difference.” The following table presents the changes in accretable yield for PCI loans for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Beginning balance $ 214,907 $ 311,688 Accretion (22,429 ) (30,569 ) Changes in expected cash flows (6,487 ) 12,036 Ending balance $ 185,991 $ 293,155 Loans Held for Sale Loans held for sale are carried at the LOCOM. When a determination is made at the time of commitment to originate or purchase loans as held-for-investment, it is the Company’s intent to hold these loans to maturity or for the “foreseeable future,” subject to periodic review under the Company’s management evaluation processes, including asset/liability management. When the Company subsequently changes its intent to hold certain loans, the loans are transferred from the loans held-for-investment portfolio to the loans held for sale portfolio at LOCOM. Loans held for sale of $28.8 million and $32.0 million as of March 31, 2016 and December 31, 2015 , respectively, were comprised of consumer loans. Transfers of loans held-for-investment to loans held for sale for the three months ended March 31, 2016 and 2015 were $308.7 million and $820.5 million , respectively. Loans transferred during the three months ended March 31, 2016 were comprised of multifamily residential, C&I and CRE loans. During the three months ended March 31, 2015 , loans transferred were comprised primarily of C&I and single-family residential loans. The Company recorded $1.8 million and $1.7 million in write-downs to the allowance for loan losses related to loans transferred from loans held-for-investment to loans held for sale for the three months ended March 31, 2016 and 2015 , respectively. For the three months ended March 31, 2016 , the Company sold or securitized approximately $256.2 million in originated loans resulting in net gains of $4.3 million . Originated loans sold or securitized during the three months ended March 31, 2016 were primarily comprised of multifamily residential, C&I and CRE loans. During the three months ended March 31, 2016 , the Company recorded $1.1 million in net gains and $641 thousand in mortgage servicing rights, and retained $160.1 million of the senior tranche of the resulting securities from the securitization of the $201.7 million of multifamily residential loans. For the three months ended March 31, 2015 , the Company sold originated loans with carrying value of approximately $326.8 million , resulting in net gains of $8.6 million . Originated loans sold during the three months ended March 31, 2015 were primarily comprised of single-family residential and C&I loans. The Company purchases loans (including participation loans) and sells loans in the secondary market. For the three months ended March 31, 2016 , the Company sold approximately $53.9 million of loans and no gains or losses were recognized from these sales. For the three months ended March 31, 2015 , the Company sold approximately $343.0 million of loans at net gains of $1.0 million . The Company recorded $2.4 million in LOCOM adjustments related to the loans held for sale portfolio during the three months ended March 31, 2016 . No LOCOM adjustment related to the loans held for sale portfolio was recorded during the three months ended March 31, 2015 . LOCOM adjustments are recorded in Net gains on sales of loans in the Consolidated Statements of Income.

INVESTMENTS IN QUALIFIED AFFORD

INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET	3 Months Ended
	Mar. 31, 2016
INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET
INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET	NOTE 8 — INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET The Community Reinvestment Act (“CRA”) encourages banks to meet the credit needs of their communities for housing and other purposes, particularly in neighborhoods with low or moderate income. The Company invests in certain affordable housing limited partnerships that qualify for CRA credits. Such limited partnerships are formed to develop and operate apartment complexes designed as high-quality affordable housing for lower income tenants throughout the United States. Each of the partnerships must meet the regulatory requirements for affordable housing for a minimum 15 -year compliance period to fully utilize the tax credits. In addition to affordable housing limited partnerships, the Company invests in new market tax credit projects that qualify for CRA credits and eligible projects that qualify for renewable energy and historic tax credits. Investments in renewable energy tax credits help promote the development of renewable energy sources, while the investments in historic tax credits promote the rehabilitation of historic buildings and economic revitalization of the surrounding areas. Investments in Qualified Affordable Housing Partnerships, Net The Company records its investments in qualified affordable housing partnerships, net using the proportional amortization method. Under the proportional amortization method, the Company amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received, and recognizes the amortization in the Consolidated Statements of Income as a component of income tax expense. The following table presents the balances of the Company’s investments in qualified affordable housing partnerships, net and related unfunded commitments as of the periods indicated: ($ in thousands) March 31, December 31, Investments in qualified affordable housing partnerships, net $ 186,999 $ 193,978 Accrued expenses and other liabilities — Unfunded commitments $ 57,936 $ 61,525 The following table presents additional information related to the Company’s investments in qualified affordable housing partnerships, net for the periods indicated: ($ in thousands) Three Months Ended March 31, 2016 2015 Tax credits and other tax benefits recognized $ 9,452 $ 8,775 Amortization expense included in income tax expense $ 6,966 $ 6,244 Investments in Tax Credit and Other Investments, Net Investments in tax credit and other investments, net were $170.4 million and $187.2 million as of March 31, 2016 and December 31, 2015 , respectively, and were included in Other assets in the Consolidated Balance Sheets. The Company is not the primary beneficiary in these partnerships and, therefore, is not required to consolidate its investments in tax credit and other investments on the Consolidated Financial Statements. Depending on the ownership percentage and the influence the Company has on the limited partnership, the Company applies either the equity method or cost method of accounting. Total unfunded commitments for these investments were $105.7 million and $113.2 million as of March 31, 2016 and December 31, 2015 , respectively, and were included in Accrued expenses and other liabilities in the Consolidated Balance Sheets. Amortization of tax credit and other investments were $14.2 million and $6.3 million for the three months ended March 31, 2016 and 2015 , respectively.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	NOTE 9 — GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill Total goodwill of $469.4 million remained unchanged as of March 31, 2016 compared to December 31, 2015 . Goodwill is tested for impairment on an annual basis as of December 31 st , or more frequently as events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company’s three operating segments, Retail Banking, Commercial Banking, and Other, are equivalent to the Company’s reporting units. For complete discussion and disclosure, please refer to Note 14 — Business Segments to the Consolidated Financial Statements. Impairment analysis The Company performed its annual impairment analysis as of December 31, 2015 and concluded that there was no goodwill impairment as the fair values of all reporting units exceeded the carrying amounts of goodwill. There were no triggering events during the three months ended March 31, 2016 and therefore, no additional goodwill impairment analysis was performed. No assurance can be given that goodwill will not be written down in future periods. Please refer to Note 10 - Goodwill and Other Intangible Assets to the Consolidated Financial Statements of the Company’s 2015 Form 10-K for additional details related to the Company’s annual goodwill impairment analysis. Premiums on Acquired Deposits Premiums on acquired deposits represent the intangible value of depositor relationships resulting from deposit liabilities assumed in various acquisitions. These intangibles are tested for impairment on an annual basis, or more frequently as events occur, or as current circumstances and conditions warrant. There were no impairment write-downs on deposit premiums for the three months ended March 31, 2016 , and 2015 . The following table presents the gross carrying value of intangible assets and accumulated amortization as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, December 31, Gross balance $ 108,814 $ 108,814 Accumulated amortization 74,843 72,739 Net carrying balance $ 33,971 $ 36,075 Amortization Expense The Company amortizes premiums on acquired deposits based on the projected useful lives of the related deposits. The amortization expense related to the intangible assets was $2.1 million and $2.4 million for the three months ended March 31, 2016 and 2015 , respectively. The following table presents the estimated future amortization expense of premiums on acquired deposits: Year Ended December 31, Amount ($ in thousands) Remainder of 2016 $ 5,982 2017 6,935 2018 5,883 2019 4,864 2020 3,846 Thereafter 6,461 Total $ 33,971

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	NOTE 10 — COMMITMENTS AND CONTINGENCIES Credit Extensions — In the normal course of business, the Company has various outstanding commitments to extend credit that are not reflected in the accompanying Consolidated Financial Statements. While the Company does not anticipate losses as a result of these transactions, commitments to extend credit are included in determining the appropriate level of the allowance for unfunded commitments and unissued commercial letters of credit and standby letters of credit (“ SBLCs”). For further information about these commitments, including their terms, see Note 14 — Commitments, Contingencies and Related Party Transactions Policies t o the Consolidated Financial Statements of the Company’s 2015 Form 10-K. The following table presents the Company’s credit-related commitments as of the periods indicated: ($ in thousands) March 31, December 31, Loan commitments $ 3,859,835 $ 3,370,271 Commercial letters of credit and SBLCs $ 1,254,590 $ 1,293,547 Loan commitments are agreements to lend to a customer provided there is no violation of any condition established in the agreement. Commitments generally have fixed expiration dates or other termination clauses and may require maintenance of compensatory balances. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future funding requirements. Commercial letters of credit are issued to facilitate domestic and foreign trade transactions while SBLCs generally are contingent upon the failure of the customers to perform according to the terms of the underlying contract with the third party. As a result, the total contractual amounts do not necessarily represent future funding requirements. The Company’s historical experience is that SBLCs typically expire without being funded. Additionally, in many cases, the Company holds collateral in various forms against these SBLCs. As a part of its risk management activities, the Company monitors the creditworthiness of customers in conjunction with its SBLC exposure. Customers are obligated to reimburse the Company for any payment made on the customers’ behalf. If customers fail to pay, the Company would, as applicable, liquidate the collateral and/or offset accounts. Total letters of credit of $1.25 billion consisted of commercial letters of credit of $45.8 million and SBLCs of $1.21 billion as of March 31, 2016 . The Company uses the same credit underwriting criteria in extending loans, commitments, and conditional obligations to customers. Each customer’s creditworthiness is evaluated on a case-by-case basis. Collateral may be obtained based on management’s assessment of the customer’s credit. Collateral may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial property. Estimated exposure to loss from these commitments is included in the allowance for unfunded credit reserves and amounted to $20.8 million and $19.8 million as of March 31, 2016 and December 31, 2015 , respectively. These amounts are included in Accrued expenses and other liabilities in the Consolidated Balance Sheets. Guarantees — The Company has sold or securitized loans with recourse in the ordinary course of business. The recourse component in the loans sold or securitized with recourse is considered a guarantee. As the guarantor, the Company is obligated to make payments when the loans default. As of March 31, 2016 and December 31, 2015 , the unpaid principal balance of total loans sold or securitized with recourse amounted to $178.4 million and $191.3 million , respectively. The maximum potential future payments of loans subject to full recourse, which is generally the unpaid principal balance of total loans sold or securitized with recourse, was $28.3 million and $29.8 million as of March 31, 2016 and December 31, 2015 , respectively. The maximum potential future payments of loans subject to limited recourse was $5.4 million and $5.9 million as of March 31, 2016 and December 31, 2015 , respectively. The recourse provision on multifamily loans varies by loan sale and is limited to 4% of the top loss on the underlying loans. The Company’s recourse reserve related to these guarantees is included in the allowance for unfunded credit reserves and totaled $580 thousand and $630 thousand as of March 31, 2016 and December 31, 2015 , respectively. The allowance for unfunded credit reserves is included in Accrued expenses and other liabilities in the Consolidated Balance Sheets. The Company continues to experience minimal losses from the single-family and multifamily loan portfolios sold or securitized with recourse. Litigation — The Company is a party to various legal actions arising in the normal course of business. In accordance with ASC 450, Contingencies , the Company accrues reserves for currently outstanding lawsuits, claims, and proceedings when a loss contingency is probable and can be reasonably estimated. The outcome of such legal actions is inherently difficult to predict and it is possible that one or more of the currently pending, threatened legal, or regulatory matters could have a material adverse effect on the Company’s liquidity, consolidated financial position, and/or results of operations. Based on the information currently available, advice of counsel and established reserves, the Company believes that the eventual outcome of pending legal matters will not individually or in the aggregate have a material adverse effect on the Company’s consolidated financial position. On September 8, 2014 , a jury in the case titled “F&F, LLC and 618 Investment, Inc. v. East West Bank,” Superior Court of the State of California for the County of Los Angeles, Case No. BC462714, delivered a verdict in favor of plaintiff F&F, LLC. The case is being appealed. The litigation accrual was $36.3 million and $35.4 million as of March 31, 2016 and December 31, 2015 , respectively. Other Commitments — The Company has commitments to invest in qualified affordable housing partnerships and other tax credit investments qualifying for historic rehabilitation tax credits or other types of tax credits. These commitments are payable on demand. As of March 31, 2016 and December 31, 2015 , these commitments were $163.6 million and $174.7 million , respectively. These commitments are included in Accrued expenses and other liabilities in the Consolidated Balance Sheets.

STOCK COMPENSATION PLANS

STOCK COMPENSATION PLANS	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK COMPENSATION PLANS	NOTE 11 — STOCK COMPENSATION PLANS Pursuant to the Company’s 1998 Stock Incentive Plan, as amended, the Company issues stock options, restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) to employees. The Company did not issue any stock options or RSAs during the three months ended March 31, 2016 and 2015 . RSUs are granted under our long-term incentive plan at no cost to the recipient. RSUs vest ratably over three years or cliff vest after three or five years of continued employment from the date of the grant. RSUs entitle the recipient to receive cash dividends equivalent to any dividends paid on the underlying common stock. The RSU dividends are accrued during the vesting period and are paid at the time of vesting. While a portion of the RSUs are time-vesting awards, others vest subject to the attainment of specified performance goals. All RSUs are subject to forfeiture until vested. All RSAs have vested during 2015 . The following table presents the total stock compensation expense and the related net tax benefit associated with the Company’s various employee share-based compensation plans for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Stock compensation costs $ 4,575 $ 3,954 Net tax benefit recognized in equity for stock compensation plans $ 986 $ 3,145 The following table presents a summary of the activity for the Company’s time-based and performance-based RSUs for the three months ended March 31, 2016 based on the target amount of awards: Three Months Ended March 31, 2016 Time-Based RSUs Performance-Based RSUs Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Outstanding at beginning of period 933,312 $ 36.83 389,358 $ 34.21 Granted 482,251 31.32 159,407 29.18 Vested (111,724 ) 25.08 (138,019 ) 25.25 Forfeited (21,191 ) 35.97 — — Outstanding at end of period 1,282,648 $ 35.80 410,746 $ 35.27 Compensation cost for the time-based awards is based on the quoted market price of the Company’s stock at the grant date. Performance-based awards granted that include discretionary performance-based vesting conditions are subject to variable accounting. As of March 31, 2016 , total unrecognized compensation cost related to time-based and performance-based RSUs amounted to $34.9 million and $13.3 million , respectively. This cost is expected to be recognized over a weighted average period of 2.23 years and 2.06 years, respectively.

STOCKHOLDERS' EQUITY AND EARNIN

STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE	3 Months Ended
	Mar. 31, 2016
STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE
STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE	NOTE 12 — STOCKHOLDERS’ EQUITY AND EARNINGS PER SHARE Warrant — The Company acquired MetroCorp Bancshares, Inc., (“MetroCorp”) on January 17, 2014. Prior to the acquisition, MetroCorp had an outstanding warrant to purchase 771,429 shares of its common stock. Upon the acquisition, the rights of the warrant holder were converted into the right to acquire 230,282 shares of East West’s common stock until January 16, 2019. The warrant has no t been exercised as of March 31, 2016 . EPS — Basic EPS is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding during each period. Diluted EPS is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding during each period, plus common share equivalents calculated for stock options, warrants and RSUs outstanding using the treasury stock method. The Company has issued RSAs, which are unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents. These RSAs are considered participating securities. Accordingly, the Company applied the two-class method in the computation of basic and diluted EPS in periods where RSAs are outstanding. Restricted stock unit awards do not contain nonforfeitable rights to dividends when granted. As of March 31, 2016, there were no RSAs outstanding. The following table presents EPS calculations for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, ($ in thousands, except per share data, shares in thousands) 2016 2015 Basic Net income $ 107,516 $ 100,027 Less: Earnings allocated to participating securities — 3 Net income allocated to common stockholders $ 107,516 $ 100,024 Basic weighted average number of shares outstanding 143,958 143,655 Basic EPS $ 0.75 $ 0.70 Diluted Net income allocated to diluted common stockholders $ 107,516 $ 100,024 Basic weighted average number of shares outstanding 143,958 143,655 Diluted potential common shares (1) 845 694 Diluted weighted average number of shares outstanding 144,803 144,349 Diluted EPS $ 0.74 $ 0.69 (1) Includes dilutive shares from RSUs and warrants for the three months ended March 31, 2016 and 2015. Also includes dilutive shares from stock options for the three months ended March 31, 2015 . For the three months ended March 31, 2016 , approximately 13 thousand weighted average anti-dilutive shares of RSUs were excluded from the diluted EPS computation. For the three months ended March 31, 2015 , approximately 170 thousand weighted average anti-dilutive shares comprised of RSUs were excluded from the diluted EPS computation.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME	NOTE 13 — ACCUMULATED OTHER COMPREHENSIVE INCOME The following table presents the changes in the components of AOCI balances for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Available- for-Sale Investment Securities Foreign Currency Translation Adjustments (1) Total Available- for-Sale Investment Securities Total Beginning balance $ (6,144 ) $ (8,797 ) $ (14,941 ) $ 4,237 $ 4,237 Net unrealized gains (losses) arising during the period 15,142 (33 ) 15,109 11,872 11,872 Amounts reclassified from AOCI (2,226 ) — (2,226 ) (2,554 ) (2,554 ) Changes, net of taxes 12,916 (33 ) 12,883 9,318 9,318 Ending balance $ 6,772 $ (8,830 ) $ (2,058 ) $ 13,555 $ 13,555 (1) Represents foreign currency translation adjustments related to the Company’s net investment in non-U.S. operations, including related hedges. In the third quarter of 2015, there was a change in functional currency from USD to the local currency of the Company’s foreign subsidiary. The following table presents the components of other comprehensive income, reclassifications to net income and the related tax effects for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Before-Tax Tax Net-of-Tax Before-Tax Tax Net-of-Tax Available-for-sale investment securities: Net unrealized gains arising during the period $ 26,130 $ (10,988 ) $ 15,142 $ 20,470 $ (8,598 ) $ 11,872 Net realized gains reclassified into net income (1) (3,842 ) 1,616 (2,226 ) (4,404 ) 1,850 (2,554 ) Net change 22,288 (9,372 ) 12,916 16,066 (6,748 ) 9,318 Foreign currency translation adjustments: Net unrealized losses arising during period (33 ) — (33 ) — — — Net change (33 ) — (33 ) — — — Other comprehensive income $ 22,255 $ (9,372 ) $ 12,883 $ 16,066 $ (6,748 ) $ 9,318 (1) For the three months ended March 31, 2016 , and 2015 , the pretax amount was reported in Net gains on sales of available-for-sale investment securities in the Consolidated Statements of Income.

BUSINESS SEGMENTS

BUSINESS SEGMENTS	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
BUSINESS SEGMENTS	NOTE 14 — BUSINESS SEGMENTS The Company utilizes an internal reporting system to measure the performance of various operating segments within the Bank and the Company. The Company has identified three operating segments for purposes of management reporting: (1) Retail Banking; (2) Commercial Banking; and (3) Other. These three business divisions meet the criteria of an operating segment: the segment engages in business activities from which it earns revenues and incurs expenses, its operating results are regularly reviewed by the Company’s chief operating decision-maker to render decisions about resources to be allocated to the segment and assess its performance, and discrete financial information is available. The Retail Banking segment focuses primarily on retail operations through the Bank’s branch network. The Commercial Banking segment, which includes CRE, primarily generates commercial loans through the commercial lending offices located in the Bank’s production offices. Furthermore, the Company’s Commercial Banking segment offers a wide variety of international finance and trade services and products. The remaining centralized functions, including treasury activities and eliminations of inter-segment amounts, have been aggregated and included in the “Other” segment, which provides broad administrative support to the two core segments. The Company’s funds transfer pricing assumptions are intended to promote core deposit growth and to reflect the current risk profiles of various loan categories within the credit portfolio. Transfer pricing assumptions and methodologies are reviewed at least annually to ensure that the Company’s process is reflective of current market conditions. The transfer pricing process is formulated with the goal of incenting loan and deposit growth that is consistent with the Company’s overall growth objectives, as well as to provide a reasonable and consistent basis for the measurement of the Company’s business segments and product net interest margins. The accounting policies of the segments are the same as those described in Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements of the Company’s 2015 Form 10-K. Operating segment results are based on the Company’s internal management reporting process, which reflects assignments and allocations of certain operating and administrative costs and the provision for credit losses. Net interest income is based on the Company’s internal funds transfer pricing system which assigns a cost of funds or a credit for funds to assets or liabilities based on their type, maturity or repricing characteristics. Noninterest income and noninterest expense, including depreciation and amortization, directly attributable to a segment are assigned to that business segment. Indirect costs, including overhead expense, are allocated to the segments based on several factors, including, but not limited to, full-time equivalent employees, loan volume and deposit volume. The provision for credit losses is allocated based on actual charge-offs for the period as well as average loan balances for each segment during the period. The Company evaluates overall performance based on profit or loss from operations before income taxes excluding nonrecurring gains and losses. Changes in the Company’s management structure or reporting methodologies may result in changes in the measurement of operating segment results. Results for prior periods are generally restated for comparability for changes in management structure or reporting methodologies unless it is not deemed practicable to do so. The following tables present the operating results and other key financial measures for the individual operating segments as of and for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 Retail Banking Commercial Banking Other Total Interest income $ 77,371 $ 177,082 $ 21,719 $ 276,172 Charge for funds used (22,652 ) (53,791 ) (11,837 ) (88,280 ) Interest spread on funds used 54,719 123,291 9,882 187,892 Interest expense (14,606 ) (4,026 ) (5,336 ) (23,968 ) Credit on funds provided 72,431 9,977 5,872 88,280 Interest spread on funds provided 57,825 5,951 536 64,312 Net interest income $ 112,544 $ 129,242 $ 10,418 $ 252,204 (Reversal of) provision for credit losses $ (1,582 ) $ 3,022 $ — $ 1,440 Depreciation, amortization and (accretion), net $ 43 $ (10,773 ) $ 23,488 $ 12,758 Segment pretax profit $ 45,945 $ 92,829 $ 5,897 $ 144,671 Segment assets $ 7,203,470 $ 17,939,537 $ 7,966,162 $ 33,109,169 ($ in thousands) Three Months Ended March 31, 2015 Retail Commercial Other Total Interest income $ 87,446 $ 158,786 $ 17,029 $ 263,261 Charge for funds used (23,298 ) (37,351 ) (9,445 ) (70,094 ) Interest spread on funds used 64,148 121,435 7,584 193,167 Interest expense (12,224 ) (4,263 ) (11,057 ) (27,544 ) Credit on funds provided 57,668 8,016 4,410 70,094 Interest spread on funds provided 45,444 3,753 (6,647 ) 42,550 Net interest income $ 109,592 $ 125,188 $ 937 $ 235,717 Provision for credit losses $ 731 $ 4,256 $ — $ 4,987 Depreciation, amortization and (accretion), net (1) $ 1,682 $ (10,477 ) $ 12,922 $ 4,127 Segment pretax profit $ 52,935 $ 93,175 $ 716 $ 146,826 Segment assets $ 7,540,501 $ 15,491,368 $ 6,874,966 $ 29,906,835 (1) Includes amortization and accretion related to the FDIC indemnification asset/net payable to the FDIC.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	3 Months Ended
	Mar. 31, 2016
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	NOTE 15 — SUBSEQUENT EVENTS On April 20, 2016 , the Company’s Board of Directors declared second quarter 2016 cash dividends of $0.20 per share for the Company’s common stock which is payable on May 16, 2016 to stockholders of record as of May 4, 2016 .

BASIS OF PRESENTATION AND ACCOU

BASIS OF PRESENTATION AND ACCOUNTING CHANGE (Policies)	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation	The unaudited interim Consolidated Financial Statements in this Form 10-Q include the accounts of East West and its subsidiaries, East West Bank and subsidiaries (referred to herein as “East West Bank” or the “Bank”) and East West Insurance Services, Inc. Intercompany transactions and balances have been eliminated in consolidation. As of March 31, 2016 , East West has six wholly-owned subsidiaries that are statutory business trusts (the “Trusts”). In accordance with FASB Accounting Standards Codification (“ASC”) Topic 810, the Trusts are not consolidated into the Company.
Basis of Accounting	The unaudited interim Consolidated Financial Statements presented in accordance with United States Generally Accepted Accounting Principles (“U.S. GAAP”), applicable guidelines prescribed by regulatory authorities, and general practices within the banking industry, reflect all adjustments that, in the opinion of management, are necessary for fair statement of the interim period financial statements. Certain prior year balances and notes have been reclassified to conform to current period presentation.
Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS ADOPTED In February 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis that changes the analysis a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The amended guidance 1) modifies the evaluation of whether limited partnerships and similar legal entities are VIEs or voting interest entities; 2) eliminates the presumption that a general partner should consolidate a limited partnership; 3) affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships; and 4) provides a scope exception from consolidation guidance for reporting entities that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a7 of the Investment Company Act of 1940 for registered money market funds. The Company adopted this amended guidance in the first quarter of 2016 and the adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 simplifies the presentation of debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts. The Company adopted this guidance retrospectively in the first quarter of 2016. The adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. In April 2015, the FASB issued ASU 2015-05, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 amends ASC 350-40 and requires the Company to determine whether a cloud computing arrangement contains a software license. If the arrangement contains a software license, the Company should account for the fees related to the software license element consistent with how the acquisitions of other software licenses are accounted for under ASC 350-40. If the arrangement does not contain a software license, the Company should account for the arrangement as a service contract. The Company adopted this guidance prospectively to all arrangements entered into or materially modified in the first quarter of 2016. The adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. RECENT ACCOUNTING PRONOUNCEMENTS In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) . The new guidance replaces existing revenue recognition guidance for contracts to provide goods or services to customers and amends existing guidance related to recognition of gains and losses on the sale of certain nonfinancial assets such as real estate. ASU 2014-09 establishes a principles-based approach to recognizing revenue that applies to all contracts other than those covered by other authoritative U.S. GAAP guidance. Quantitative and qualitative disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows are also required. Further in March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) , to amend the principal versus agent guidance in the new revenue standard. ASU 2014-09 and ASU 2015-09 are effective for interim and annual periods beginning after December 15, 2017 and are applied on either a modified retrospective or full retrospective basis. Early adoption is not permitted. The Company is currently evaluating the impact on its Consolidated Financial Statements. In January 2016, the FASB issued ASU 2016-01, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires equity investments, except those accounted for under the equity method of accounting or consolidated, to be measured at fair value with changes recognized in net income. If there is no readily determinable fair value, the guidance allows entities the ability to measure investments at cost less impairment, whereby impairment is based on a qualitative assessment. The guidance eliminates the requirement to disclose the methods and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost and changes the presentation of financial assets and financial liabilities on the balance sheet or in the footnotes. If an entity has elected the fair value option to measure liabilities, the new accounting guidance requires the portion of the change in the fair value of a liability resulting from credit risk to be presented in other comprehensive income. The Company has not elected to measure any of its liabilities at fair value. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is not permitted except for certain specific changes under the fair value option guidance. To adopt the amendments, the Company is required to make a cumulative-effect adjustment to the consolidated balance sheet as of the beginning of the fiscal year in which the guidance is effective. However, the amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the adoption date. The Company is currently evaluating the impact on its Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which is intended to increase transparency and comparability in the accounting for lease transactions. ASU 2016-02 requires lessees to recognize all leases longer than twelve months on the consolidated balance sheet as lease assets and lease liabilities and quantitative and qualitative disclosures regarding key information about leasing arrangements. Lessor accounting is largely unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years with an option to early adopt. The Company is currently evaluating the impact on its Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships , to clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument in an existing hedging relationship would not be considered a termination of the derivative instrument or a change in a critical term of the hedging relationship provided that all other hedge accounting criteria in ASC 815 continue to be met. This clarification applies to both cash flow and fair value hedging relationships. ASU 2016-05 is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years with an option to early adopt. The Company has an option to adopt the amendments of this ASU either on a prospective basis or modified retrospective basis. The Company does not expect the adoption of this guidance to have a material impact on its Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-07, Investments—Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting, to eliminate the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. The amendments in ASU 2016-07 also require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in AOCI at the date the investment becomes qualified for use of the equity method. ASU 2016-07 is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years and should be applied prospectively. Early adoption is not permitted. The Company is currently evaluating the impact on its Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, to simplify several aspects of the accounting for share-based payment transactions, including the accounting for income taxes, forfeitures, statutory tax withholding requirements, as well as classification in the statement of cash flows. ASU 2016-09 also eliminated certain guidance in ASC 718 on when awards cease to be within the scope of ASC 718 and instead become subject to other U.S. GAAP requirements. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact on its Consolidated Financial Statements.
Credit Quality Indicators	Credit Quality Indicators All loans are subject to the Company’s internal and external credit review and monitoring. Loans are risk rated based on an analysis of the current state of the borrower’s credit quality. The analysis of credit quality includes a review of all repayment sources, the borrower’s current payment performance/delinquency, current financial and liquidity status and all other relevant information. For single-family residential loans, payment performance/delinquency is the driving indicator for the risk ratings. Risk ratings are the overall credit quality indicator for the Company and the credit quality indicator utilized for estimating the appropriate allowance for loan losses. The Company utilizes a risk rating system, which can be classified within the following categories: Pass, Watch, Special Mention, Substandard, Doubtful and Loss. The risk ratings reflect the relative strength of the repayment sources. Pass and Watch loans are generally considered to have sufficient sources of repayment in order to repay the loan in full in accordance with all terms and conditions. These borrowers may have some credit risks that require monitoring, but full repayments are expected. Special Mention loans are considered to have potential weaknesses that warrant closer attention by management. Special Mention is considered a transitory grade. If potential weaknesses are resolved, the loan is upgraded to a Pass or Watch grade. If negative trends in the borrower’s financial status or other information indicates that the repayment sources may become inadequate, the loan is downgraded to a Substandard grade. Substandard loans are considered to have well-defined weaknesses that jeopardize the full and timely repayment of the loan. Substandard loans have a distinct possibility of loss, if the deficiencies are not corrected. Additionally, when management has assessed a potential for loss but a distinct possibility of loss is not recognizable, the loan is still classified as Substandard. Doubtful loans have insufficient sources of repayment and a high probability of loss. Loss loans are considered to be uncollectible and of such little value that they are no longer considered bankable assets. These internal risk ratings are reviewed routinely and adjusted based on changes in the borrowers’ financial status and collectability.
Impaired Loans	Impaired Loans The Company’s loans are grouped into heterogeneous and homogeneous (mostly consumer loans) categories. Classified loans in the heterogeneous category are identified and evaluated for impairment on an individual basis. A loan is considered impaired when, based on current information and events, it is probable that the Company will not be able to collect all scheduled payments of principal or interest due in accordance with the original contractual terms. Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate or, as expedient, at the loan’s observable market price or the fair value of the collateral, if the loan is collateral dependent, less costs to sell. When the value of an impaired loan is less than the recorded investment and the loan is classified as nonperforming and uncollectible, the deficiency is charged-off against the allowance for loan losses. Impaired loans exclude the homogeneous consumer loan portfolio, which is evaluated collectively for impairment. The Company’s impaired loans include predominantly non-PCI loans held-for-investment on nonaccrual status and any non-PCI loans modified in a TDR, which may be on accrual or nonaccrual status.

FAIR VALUE MEASUREMENT AND FA24

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2016
Quantitative information
Assets (liabilities) measured at fair value on a recurring basis	The following tables present financial assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2016 and December 31, 2015 : Assets (Liabilities) Measured at Fair Value on a Recurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Available-for-sale investment securities: U.S. Treasury securities $ 516,755 $ 516,755 $ — $ — U.S. government agency and U.S. government sponsored enterprise debt securities 788,935 — 788,935 — U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 326,987 — 326,987 — Residential mortgage-backed securities 935,099 — 935,099 — Municipal securities 159,426 — 159,426 — Non-agency residential mortgage-backed securities: Investment grade 59,899 — 59,899 — Corporate debt securities: Investment grade 365,905 — 365,905 — Non-investment grade 7,924 — 7,924 — Other securities 44,308 36,212 8,096 — Total available-for-sale investment securities $ 3,205,238 $ 552,967 $ 2,652,271 $ — Derivative assets: Interest rate swaps on certificates of deposit $ 54 $ — $ 54 $ — Interest rate swaps and options $ 129,599 $ — $ 129,599 $ — Foreign exchange contracts $ 8,817 $ — $ 8,817 $ — Derivative liabilities: Interest rate swaps on certificates of deposit $ (1,038 ) $ — $ (1,038 ) $ — Foreign currency forward contracts $ (430 ) $ — $ (430 ) $ — Interest rate swaps and options $ (130,420 ) $ — $ (130,420 ) $ — Foreign exchange contracts $ (6,196 ) $ — $ (6,196 ) $ — Credit risk participation agreements (“RPAs”) $ (11 ) $ — $ (11 ) $ — Assets (Liabilities) Measured at Fair Value on a Recurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Significant Significant Unobservable Inputs (Level 3) Available-for-sale investment securities: U.S. Treasury securities $ 998,515 $ 998,515 $ — $ — U.S. government agency and U.S. government sponsored enterprise debt securities 768,849 — 768,849 — U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 351,662 — 351,662 — Residential mortgage-backed securities 997,396 — 997,396 — Municipal securities 175,649 — 175,649 — Non-agency residential mortgage-backed securities: Investment grade 62,393 — 62,393 — Corporate debt securities: Investment grade 364,713 — 364,713 — Non-investment grade 9,642 — 9,642 — Other securities 44,407 35,635 8,772 — Total available-for-sale investment securities $ 3,773,226 $ 1,034,150 $ 2,739,076 $ — Derivative assets: Foreign currency forward contracts $ 2,365 $ — $ 2,365 $ — Interest rate swaps and options $ 67,215 $ — $ 67,215 $ — Foreign exchange contracts $ 10,254 $ — $ 10,254 $ — Derivative liabilities: Interest rate swaps on certificates of deposit $ (5,213 ) $ — $ (5,213 ) $ — Interest rate swaps and options $ (67,325 ) $ — $ (67,325 ) $ — Foreign exchange contracts $ (9,350 ) $ — $ (9,350 ) $ — RPAs $ (4 ) $ — $ (4 ) $ —
Reconciliation of assets and liabilities measured at fair value using significant unobservable inputs	The following table presents a reconciliation of the beginning and ending balances for major asset and liability categories measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2015 : ($ in thousands) Three Months Ended March 31, 2015 Corporate Debt Grade Embedded Derivative Beginning balance $ 6,528 $ (3,392 ) Total gains (losses) for the period: Included in earnings (1) 960 (20 ) Included in other comprehensive income (2) 922 — Sales and settlements: Sales (7,219 ) — Settlements (98 ) — Transfers in and/or out of Level 3 (1,093 ) — Ending balance $ — $ (3,412 ) Change in unrealized losses included in earnings relating to assets and liabilities held for the period $ — $ (20 ) (1) Net gains or losses (realized and unrealized) of corporate debt securities and embedded derivative liabilities are included in Net gains on sales of available-for-sale investment securities and Other operating expense , respectively, in the Consolidated Statements of Income. (2) Unrealized gains or losses on available-for-sale investment securities are reported in Other comprehensive income, net of tax , in the Consolidated Statements of Comprehensive Income.
Assets measured at fair value on a nonrecurring basis	The following tables present the carrying amounts of all assets that were still held as of March 31, 2016 and December 31, 2015 for which a nonrecurring fair value measurement was recorded: Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Significant Significant Unobservable Inputs (Level 3) Non-PCI impaired loans: Commercial real estate (“CRE”) $ 13,147 $ — $ — $ 13,147 Commercial and industrial (“C&I”) 48,788 — — 48,788 Residential 17,345 — — 17,345 Consumer 1,570 — — 1,570 Total non-PCI impaired loans $ 80,850 $ — $ — $ 80,850 OREO $ 3,490 $ — $ — $ 3,490 Loans held for sale $ 28,795 $ — $ 28,795 $ — Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Fair Value Measurements Quoted Prices in Significant Significant Unobservable Inputs (Level 3) Non-PCI impaired loans: CRE $ 17,252 $ — $ — $ 17,252 C&I 35,558 — — 35,558 Residential 16,472 — — 16,472 Consumer 1,180 — — 1,180 Total non-PCI impaired loans $ 70,462 $ — $ — $ 70,462 OREO $ 4,929 $ — $ — $ 4,929 Loans held for sale $ 29,238 $ — $ 29,238 $ —
Summary of increase (decrease) in value of certain assets for which a nonrecurring fair value adjustment has been recognized	The following table presents fair value adjustments of certain assets measured on a nonrecurring basis recognized for the three months ended and still held as of March 31, 2016 and 2015 : Three Months Ended March 31, ($ in thousands) 2016 2015 Non-PCI impaired loans: CRE $ 2,178 $ 841 C&I (1,935 ) (2,470 ) Residential (83 ) (239 ) Consumer 3 — Total non-PCI impaired loans $ 163 $ (1,868 ) OREO $ (461 ) $ (277 ) Loans held for sale $ (2,351 ) $ —
Carrying amounts and fair values of financial instruments	The following tables present the carrying and fair values per the fair value hierarchy of certain financial instruments, excluding those measured at fair value on a recurring basis, as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, 2016 Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Financial assets: Cash and cash equivalents $ 2,265,297 $ 2,265,297 $ — $ — $ 2,265,297 Short-term investments $ 305,548 $ — $ 305,548 $ — $ 305,548 Resale agreements (1) $ 1,800,000 $ — $ 1,571,665 $ — $ 1,571,665 Held-to-maturity investment security $ 160,135 $ — $ — $ 160,135 $ 160,135 Loans held for sale $ 28,795 $ — $ 28,795 $ — $ 28,795 Loans receivable, net $ 23,494,126 $ — $ — $ 23,344,433 $ 23,344,433 Investment in FHLB stock $ 18,157 $ — $ 18,157 $ — $ 18,157 Investment in Federal Reserve Bank stock $ 55,079 $ — $ 55,079 $ — $ 55,079 Accrued interest receivable $ 88,804 $ — $ 88,804 $ — $ 88,804 Financial liabilities: Customer deposit accounts: Demand, savings and money market deposits $ 22,531,531 $ — $ 22,531,531 $ — $ 22,531,531 Time deposits $ 6,064,716 $ — $ 6,063,265 $ — $ 6,063,265 Short-term borrowings $ 10,093 $ — $ 10,093 $ — $ 10,093 FHLB advances $ 319,973 $ — $ 332,474 $ — $ 332,474 Repurchase agreements (1) $ 200,000 $ — $ 271,367 $ — $ 271,367 Accrued interest payable $ 8,507 $ — $ 8,507 $ — $ 8,507 Long-term debt $ 201,102 $ — $ 194,189 $ — $ 194,189 (1) Resale and repurchase agreements are reported net pursuant to ASC 210-20-45, Balance Sheet Offsetting . As of March 31, 2016 , $250.0 million out of $450.0 million of repurchase agreements was eligible for netting against resale agreements. December 31, 2015 ($ in thousands) Carrying Level 1 Level 2 Level 3 Estimated Financial assets: Cash and cash equivalents $ 1,360,887 $ 1,360,887 $ — $ — $ 1,360,887 Short-term investments $ 299,916 $ — $ 299,916 $ — $ 299,916 Resale agreements (1) $ 1,600,000 $ — $ 1,533,961 $ — $ 1,533,961 Loans held for sale $ 31,958 $ — $ 31,958 $ — $ 31,958 Loans receivable, net $ 23,378,789 $ — $ — $ 23,000,817 $ 23,000,817 Investment in FHLB stock $ 28,770 $ — $ 28,770 $ — $ 28,770 Investment in Federal Reserve Bank stock $ 54,932 $ — $ 54,932 $ — $ 54,932 Accrued interest receivable $ 89,243 $ — $ 89,243 $ — $ 89,243 Financial liabilities: Customer deposit accounts: Demand, savings and money market deposits $ 20,859,086 $ — $ 20,859,086 $ — $ 20,859,086 Time deposits $ 6,616,895 $ — $ 6,606,942 $ — $ 6,606,942 FHLB advances $ 1,019,424 $ — $ 1,032,000 $ — $ 1,032,000 Accrued interest payable $ 8,848 $ — $ 8,848 $ — $ 8,848 Long-term debt $ 206,084 $ — $ 186,593 $ — $ 186,593 (1) Resale and repurchase agreements are reported net pursuant to ASC 210-20-45, Balance Sheet Offsetting . As of December 31, 2015, the carrying amount of $450.0 million of repurchase agreements was eligible for netting against resale agreements, resulting in no repurchase agreements’ balances reported.
Fair Value, Measurements, Nonrecurring
Quantitative information
Schedule of quantitative information about significant unobservable inputs used in the valuation of assets and liabilities classified as Level 3	The following table presents quantitative information about significant unobservable inputs used in the valuation of assets measured on a nonrecurring basis classified as Level 3 as of March 31, 2016 and December 31, 2015 : ($ in thousands) Fair Value Valuation Unobservable Range of Inputs Weighted March 31, 2016 Non-PCI impaired loans $ 40,719 Discounted cash flow Discount rate 0% - 84% 23% $ 40,131 Market comparables Discount rate (1) 0% - 43% 12% OREO $ 3,490 Appraisal Selling cost 8% 8% December 31, 2015 Non-PCI impaired loans $ 27,522 Discounted cash flow Discount rate 0% - 87% 30% $ 42,940 Market comparables Discount rate (1) 0% - 100% 17% OREO $ 4,929 Appraisal Selling cost 8% 8% (1) Discount rate is adjusted for factors such as liquidation cost of collateral and selling cost.

SECURITIES PURCHASED UNDER RE25

SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS (Tables)	3 Months Ended
	Mar. 31, 2016
RESALE AND REPURCHASE AGREEMENTS
Schedule of balance sheet offsetting for resale agreements and repurchase agreements	The following tables present resale and repurchase agreements included on the Consolidated Balance Sheets as of March 31, 2016 and December 31, 2015 : ($ in thousands) As of March 31, 2016 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Resale agreements $ 2,050,000 $ (250,000 ) $ 1,800,000 $ — $ (1,797,373 ) (1) $ 2,627 Gross Amounts Gross Amounts Net Amounts of on the Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Repurchase agreements $ 450,000 $ (250,000 ) $ 200,000 $ — $ (200,000 ) (2) $ — ($ in thousands) As of December 31, 2015 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Resale agreements $ 2,050,000 $ (450,000 ) $ 1,600,000 $ — $ (1,593,503 ) (1) $ 6,497 Gross Amounts Gross Amounts Net Amounts of on the Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Repurchase agreements $ 450,000 $ (450,000 ) $ — $ — $ — (2) $ — (1) Represents the fair value of securities the Company has received under resale agreements, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. (2) Represents the fair value of securities the Company has pledged under repurchase agreements, limited for table presentation purposes to the amount of the recognized liability owed to each counterparty.

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost, gross unrealized gains, gross unrealized losses and fair value by major categories of investment securities	The following table presents the amortized cost, gross unrealized gains and losses and fair value by major categories of available-for-sale investment securities, which are carried at fair value, and a held-to-maturity investment security, which is carried at amortized cost: ($ in thousands) Amortized Gross Gross Fair As of March 31, 2016 Available-for-sale investment securities: U.S. Treasury securities $ 514,827 $ 2,002 $ (74 ) $ 516,755 U.S. government agency and U.S. government sponsored enterprise debt securities 787,846 1,671 (582 ) 788,935 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 325,071 3,132 (1,216 ) 326,987 Residential mortgage-backed securities 927,989 9,421 (2,311 ) 935,099 Municipal securities 156,327 3,254 (155 ) 159,426 Non-agency residential mortgage-backed securities: Investment grade (1) 58,960 1,015 (76 ) 59,899 Corporate debt securities: Investment grade (1) 368,206 212 (2,513 ) 365,905 Non-investment grade (1) 10,191 — (2,267 ) 7,924 Other securities 44,136 499 (327 ) 44,308 Total available-for-sale investment securities 3,193,553 21,206 (9,521 ) 3,205,238 Held-to-maturity investment security: Non-agency commercial mortgage-backed security 160,135 — — 160,135 Total investment securities $ 3,353,688 $ 21,206 $ (9,521 ) $ 3,365,373 As of December 31, 2015 Available-for-sale investment securities: U.S. Treasury securities $ 1,002,874 $ 33 $ (4,392 ) $ 998,515 U.S. government agency and U.S. government sponsored enterprise debt securities 771,288 555 (2,994 ) 768,849 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 354,418 268 (3,024 ) 351,662 Residential mortgage-backed securities 996,255 7,542 (6,401 ) 997,396 Municipal securities 173,785 2,657 (793 ) 175,649 Non-agency residential mortgage-backed securities: Investment grade (1) 62,133 433 (173 ) 62,393 Corporate debt securities: Investment grade (1) 366,921 132 (2,340 ) 364,713 Non-investment grade (1) 11,491 — (1,849 ) 9,642 Other securities 44,664 124 (381 ) 44,407 Total available-for-sale investment securities $ 3,783,829 $ 11,744 $ (22,347 ) $ 3,773,226 (1) Available-for-sale investment securities rated BBB- or higher by S&P or Baa3 or higher by Moody’s are considered investment grade. Conversely, available-for-sale investment securities rated lower than BBB- by S&P or lower than Baa3 by Moody’s are considered non-investment grade. Classifications are based on the lower credit rating by S&P or Moody’s.
Schedule of gross unrealized losses and related fair value of investment securities	The following table presents the Company’s investment portfolio’s gross unrealized losses and related fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position: ($ in thousands) Less Than 12 Months 12 Months or More Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses As of March 31, 2016 Available-for-sale investment securities: U.S. Treasury securities $ 60,855 $ (42 ) $ 30,570 $ (32 ) $ 91,425 $ (74 ) U.S. government agency and U.S. government sponsored enterprise debt securities 229,834 (571 ) 9,189 (11 ) 239,023 (582 ) U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 103,881 (826 ) 31,130 (390 ) 135,011 (1,216 ) Residential mortgage-backed securities 255,839 (1,381 ) 45,674 (930 ) 301,513 (2,311 ) Municipal securities 5,917 (31 ) 15,794 (124 ) 21,711 (155 ) Non-agency residential mortgage-backed securities: Investment grade 13,945 (57 ) 6,167 (19 ) 20,112 (76 ) Corporate debt securities: Investment grade 248,730 (976 ) 90,899 (1,537 ) 339,629 (2,513 ) Non-investment grade — — 7,924 (2,267 ) 7,924 (2,267 ) Other securities 7,203 (3 ) 8,676 (324 ) 15,879 (327 ) Total available-for-sale investment securities $ 926,204 $ (3,887 ) $ 246,023 $ (5,634 ) $ 1,172,227 $ (9,521 ) As of December 31, 2015 Available-for-sale investment securities: U.S. Treasury securities $ 907,400 $ (4,250 ) $ 20,282 $ (142 ) $ 927,682 $ (4,392 ) U.S. government agency and U.S. government sponsored enterprise debt securities 541,385 (2,994 ) — — 541,385 (2,994 ) U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 252,340 (2,562 ) 20,793 (462 ) 273,133 (3,024 ) Residential mortgage-backed securities 535,842 (4,530 ) 58,315 (1,871 ) 594,157 (6,401 ) Municipal securities 48,495 (437 ) 14,739 (356 ) 63,234 (793 ) Non-agency residential mortgage-backed securities: Investment grade 5,123 (1 ) 6,242 (172 ) 11,365 (173 ) Corporate debt securities: Investment grade 218,944 (1,189 ) 89,989 (1,151 ) 308,933 (2,340 ) Non-investment grade — — 9,642 (1,849 ) 9,642 (1,849 ) Other securities 17,990 (112 ) 8,731 (269 ) 26,721 (381 ) Total available-for-sale investment securities $ 2,527,519 $ (16,075 ) $ 228,733 $ (6,272 ) $ 2,756,252 $ (22,347 )
Schedule of other than temporary impairment, credit losses recognized in earnings	The following table presents a rollforward of the amounts related to the OTTI credit losses recognized in earnings for the three months ended March 31, 2016 and 2015: ($ in thousands) Three Months Ended March 31, 2016 2015 Beginning balance $ — $ 112,338 Addition of OTTI previously not recognized — — Additional increase to the amount related to the credit loss for which an OTTI was previously recognized — — Reduction for securities sold — (5,650 ) Ending balance $ — $ 106,688
Schedule of sales of investment securities	The following table presents the proceeds, gross realized gains and losses related to the sales of available-for-sale investment securities for the three months ended March 31, 2016 and 2015: ($ in thousands) Three Months Ended March 31, 2016 2015 Proceeds from sales $ 652,753 $ 180,501 Gross realized gains $ 3,967 $ 4,404 Gross realized losses $ 125 $ — Related tax expense $ 1,614 $ 1,850
Scheduled maturities of investment securities	The following table presents the scheduled maturities of available-for-sale investment securities as of March 31, 2016 : ($ in thousands) Amortized Cost Estimated Fair Value Due within one year $ 821,310 $ 819,156 Due after one year through five years 712,823 718,395 Due after five years through ten years 380,657 380,493 Due after ten years 1,278,763 1,287,194 Total available-for-sale investment securities $ 3,193,553 $ 3,205,238 The following table presents the scheduled maturity of the held-to-maturity investment security as of March 31, 2016 : ($ in thousands) Amortized Cost Estimated Fair Value Due after ten years $ 160,135 $ 160,135

DERIVATIVES (Tables)

DERIVATIVES (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional or contractual amounts and fair values for derivatives	The following table presents the total notional and fair values of the Company’s derivatives as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, 2016 December 31, 2015 Notional Amount Fair Value Notional Amount Fair Value Derivative Assets (1) Derivative Liabilities (1) Derivative Assets (1) Derivative Liabilities (1) Derivatives designated as hedging instruments: Interest rate swaps on certificates of deposit $ 73,496 $ 54 $ 1,038 $ 112,913 $ — $ 5,213 Foreign currency forward contracts 85,451 — 430 86,590 2,365 — Total derivatives designated as hedging instruments $ 158,947 $ 54 $ 1,468 $ 199,503 $ 2,365 $ 5,213 Derivatives not designated as hedging instruments: Interest rate swaps and options $ 6,685,066 $ 129,599 $ 130,420 $ 6,494,900 $ 67,215 $ 67,325 Foreign exchange contracts 724,894 8,817 6,196 652,993 10,254 9,350 RPAs 42,096 — 11 43,033 — 4 Total derivatives not designated as hedging instruments $ 7,452,056 $ 138,416 $ 136,627 $ 7,190,926 $ 77,469 $ 76,679 (1) Derivative assets are included in Other assets in the Consolidated Balance Sheets. Derivative liabilities are included in Accrued expenses and other liabilities and Interest-bearing deposits in the Consolidated Balance Sheets.
Net gains (losses) recognized in the Income Statement related to derivatives in fair value hedging relationships	The following table presents the net gains (losses) recognized in the Consolidated Statements of Income related to derivatives designated as fair value hedges for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Gains (losses) recorded in interest expense: Recognized on interest rate swaps $ 4,229 $ 3,048 Recognized on certificates of deposit (3,356 ) (2,695 ) Net amount recognized on fair value hedges (ineffective portion) $ 873 $ 353
Gains (losses) related to net investment hedges in accumulated other comprehensive income (loss) and Statement of Income	The following table presents the losses recorded in the Foreign currency translation account within AOCI related to the effective portion of the net investment hedges and ineffectiveness recorded in the Consolidated Statements of Income for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Losses recognized in AOCI on net investment hedges (effective portion) $ 1,485 $ — Losses recognized in Foreign exchange income (ineffective portion) $ 880 $ —
Net gains (losses) recognized in the Income Statement related to derivatives not designated as hedging instruments	The following table presents the net gains (losses) recognized on the Company’s Consolidated Statements of Income related to derivatives not designated as hedging instruments for the three months ended March 31, 2016 and 2015 : ($ in thousands) Location in Consolidated Statements of Income Three Months Ended March 31, 2016 2015 Derivatives not designated as hedging instruments: Interest rate swaps and options Other fees and operating income $ (711 ) $ (594 ) Foreign exchange contracts Foreign exchange income 2,828 1,308 RPA Other fees and operating income (11 ) — Foreign exchange options Foreign exchange income — 199 Embedded derivative liabilities Other operating expense — (141 ) Total net income $ 2,106 $ 772
Balance sheet offsetting of derivative assets and liabilities and the respective collateral received or pledged in the form of other financial instruments, which are generally marketable securities	The following tables present gross derivatives on the Consolidated Balance Sheets and the respective collateral received or pledged in the form of other financial instruments, which are generally marketable securities and/or cash. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability (after netting is applied); thus instances of overcollateralization are not shown: ($ in thousands) As of March 31, 2016 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Derivatives $ 6,470 $ — $ 6,470 $ (5,094 ) (1) $ (1,093 ) (2) $ 283 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Derivatives $ 135,938 $ — $ 135,938 $ (5,094 ) (1) $ (130,255 ) (3) $ 589 ($ in thousands) As of December 31, 2015 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Assets Financial Collateral Net Amount Derivatives $ 8,733 $ — $ 8,733 $ (5,293 ) (1) $ (3,068 ) (2) $ 372 Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Liabilities Financial Collateral Net Amount Derivatives $ 78,779 $ — $ 78,779 $ (5,293 ) (1) $ (73,109 ) (3) $ 377 (1) Represents the netting of derivative receivable and payable balances for the same counterparty under enforceable master netting arrangements if the Company has elected to net. (2) Represents $1.1 million and $3.1 million of cash collateral received against derivative assets with the same counterparty that are subject to enforceable master netting arrangements as of March 31, 2016 and December 31, 2015 , respectively. (3) Represents cash and securities pledged against derivative liabilities with the same counterparty that are subject to enforceable master netting arrangements. Includes approximately $39.6 million and $21.1 million of cash collateral posted as of March 31, 2016 and December 31, 2015 , respectively.

LOANS RECEIVABLE AND ALLOWANC28

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Tables)	3 Months Ended
	Mar. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Schedule of the composition of Non-PCI and PCI loans	The following table presents the composition of the Company’s non-PCI and PCI loans as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, 2016 December 31, 2015 Non-PCI Loans PCI Loans (1) Total (1) Non-PCI Loans PCI Loans (1) Total (1) CRE: Income producing $ 7,317,991 $ 498,451 $ 7,816,442 $ 6,937,199 $ 541,275 $ 7,478,474 Construction 465,763 1,340 467,103 436,776 1,895 438,671 Land 165,071 2,862 167,933 187,409 6,195 193,604 Total CRE 7,948,825 502,653 8,451,478 7,561,384 549,365 8,110,749 C&I: Commercial business 8,001,280 52,255 8,053,535 8,155,991 57,906 8,213,897 Trade finance 763,495 1,213 764,708 787,800 1,310 789,110 Total C&I 8,764,775 53,468 8,818,243 8,943,791 59,216 9,003,007 Residential: Single-family 2,927,219 176,172 3,103,391 2,877,286 189,633 3,066,919 Multifamily 1,236,722 111,285 1,348,007 1,374,718 148,277 1,522,995 Total residential 4,163,941 287,457 4,451,398 4,252,004 337,910 4,589,914 Consumer 2,023,521 23,263 2,046,784 1,931,828 24,263 1,956,091 Total loans $ 22,901,062 $ 866,841 $ 23,767,903 $ 22,689,007 $ 970,754 $ 23,659,761 Unearned fees, premiums, and discounts, net (13,539 ) — (13,539 ) (16,013 ) — (16,013 ) Allowance for loan losses (259,910 ) (328 ) (260,238 ) (264,600 ) (359 ) (264,959 ) Loans, net $ 22,627,613 $ 866,513 $ 23,494,126 $ 22,408,394 $ 970,395 $ 23,378,789 (1) Loans net of ASC 310-30 discount.
Summary of credit risk rating by portfolio segment	The following tables present the credit risk rating for non-PCI loans by portfolio segment as of March 31, 2016 and December 31, 2015 : ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total Non-PCI Loans March 31, 2016 CRE: Income producing $ 7,061,501 $ 39,236 $ 217,254 $ — $ 7,317,991 Construction 462,989 2,339 435 — 465,763 Land 150,149 — 14,922 — 165,071 C&I: Commercial business 7,579,392 198,560 199,521 23,807 8,001,280 Trade finance 730,867 9,907 22,721 — 763,495 Residential: Single-family 2,891,346 7,728 28,145 — 2,927,219 Multifamily 1,185,914 1,925 48,883 — 1,236,722 Consumer 2,015,809 2,650 5,062 — 2,023,521 Total $ 22,077,967 $ 262,345 $ 536,943 $ 23,807 $ 22,901,062 ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total Non-PCI Loans December 31, 2015 CRE: Income producing $ 6,672,951 $ 59,309 $ 204,939 $ — $ 6,937,199 Construction 435,112 1,194 470 — 436,776 Land 172,189 — 15,220 — 187,409 C&I: Commercial business 7,794,735 201,280 135,449 24,527 8,155,991 Trade finance 750,144 13,812 23,844 — 787,800 Residential: Single-family 2,841,722 8,134 27,430 — 2,877,286 Multifamily 1,317,550 2,918 54,250 — 1,374,718 Consumer 1,926,418 883 4,527 — 1,931,828 Total $ 21,910,821 $ 287,530 $ 466,129 $ 24,527 $ 22,689,007 The following tables present the credit risk rating for PCI loans by portfolio segment as of March 31, 2016 and December 31, 2015 : ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total PCI Loans March 31, 2016 CRE: Income producing $ 402,651 $ 13,013 $ 82,787 $ — $ 498,451 Construction — — 1,340 — 1,340 Land 2,272 — 590 — 2,862 C&I: Commercial business 46,426 1,185 4,644 — 52,255 Trade finance 1,213 — — — 1,213 Residential: Single-family 170,788 1,013 4,371 — 176,172 Multifamily 97,447 — 13,838 — 111,285 Consumer 21,880 452 931 — 23,263 Total (1) $ 742,677 $ 15,663 $ 108,501 $ — $ 866,841 ($ in thousands) Pass/Watch Special Mention Substandard Doubtful Total PCI Loans December 31, 2015 CRE: Income producing $ 440,100 $ 4,987 $ 96,188 $ — $ 541,275 Construction — — 1,895 — 1,895 Land 4,285 — 1,910 — 6,195 C&I: Commercial business 52,212 819 4,875 — 57,906 Trade finance 1,310 — — — 1,310 Residential: Single-family 184,092 1,293 4,248 — 189,633 Multifamily 130,770 — 17,507 — 148,277 Consumer 23,121 452 690 — 24,263 Total (1) $ 835,890 $ 7,551 $ 127,313 $ — $ 970,754 (1) Loans net of ASC 310-30 discount.
Schedule of aging analysis on non-PCI loans	The following tables present the aging analysis on non-PCI loans as of March 31, 2016 and December 31, 2015 : ($ in thousands) Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Nonaccrual Loans Less Than 90 Days Past Due Nonaccrual Loans 90 or More Days Past Due Total Nonaccrual Loans Current Accruing Loans Total Non-PCI Loans March 31, 2016 CRE: Income producing $ 8,580 $ 5,853 $ 14,433 $ 12,939 $ 39,927 $ 52,866 $ 7,250,692 $ 7,317,991 Construction — — — — — — 465,763 465,763 Land 1,849 121 1,970 6,182 — 6,182 156,919 165,071 C&I: Commercial business 5,687 3,531 9,218 56,380 7,984 64,364 7,927,698 8,001,280 Trade finance — — — 8,375 — 8,375 755,120 763,495 Residential: Single-family 5,117 2,683 7,800 2,521 8,850 11,371 2,908,048 2,927,219 Multifamily 6,164 1,097 7,261 5,641 9,149 14,790 1,214,671 1,236,722 Consumer 1,522 619 2,141 3,504 1,174 4,678 2,016,702 2,023,521 Total $ 28,919 $ 13,904 $ 42,823 $ 95,542 $ 67,084 $ 162,626 $ 22,695,613 $ 22,901,062 ($ in thousands) Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Nonaccrual Loans Less Than 90 Days Past Due Nonaccrual Loans 90 or More Days Past Due Total Nonaccrual Loans Current Accruing Loans Total Non-PCI Loans December 31, 2015 CRE: Income producing $ 3,465 $ 25,256 $ 28,721 $ 11,359 $ 17,870 $ 29,229 $ 6,879,249 $ 6,937,199 Construction — — — 14 — 14 436,762 436,776 Land 1,124 — 1,124 277 406 683 185,602 187,409 C&I: Commercial business 1,992 1,185 3,177 50,726 14,009 64,735 8,088,079 8,155,991 Trade finance — — — — — — 787,800 787,800 Residential: Single-family 7,657 2,927 10,584 92 8,634 8,726 2,857,976 2,877,286 Multifamily 6,320 981 7,301 6,486 9,758 16,244 1,351,173 1,374,718 Consumer 2,078 209 2,287 233 1,505 1,738 1,927,803 1,931,828 Total $ 22,636 $ 30,558 $ 53,194 $ 69,187 $ 52,182 $ 121,369 $ 22,514,444 $ 22,689,007
Summary of additions and modifications to non-PCI troubled debt restructurings	The following tables present the additions to non-PCI TDRs for the three months ended March 31, 2016 and 2015 : ($ in thousands) Loans Modified as TDRs During the Three Months Ended March 31, 2016 Number Pre-Modification Post-Modification (1) Financial (2) CRE: Income producing 2 $ 13,775 $ 13,753 $ — C&I: Commercial business 4 $ 21,614 $ 18,632 $ 97 Trade finance 2 $ 7,901 $ 8,083 $ — Residential: Single-family 1 $ 276 $ 273 $ — Consumer: 1 $ 344 $ 343 $ 1 Loans Modified as TDRs During the Three Months Ended March 31, 2015 ($ in thousands) Number Pre-Modification Post-Modification (1) Financial (2) CRE: Income producing 1 $ 828 $ 833 $ — C&I: Commercial business 1 $ 167 $ 164 $ 32 Residential: Single-family 1 $ 281 $ 281 $ 2 (1) Includes subsequent payments after modification and reflects the balance as of March 31, 2016 and 2015 . (2) The financial impact includes charge-offs and specific reserves recorded at the modification date. The following tables summarize the non-PCI TDR modifications for the three months ended March 31, 2016 and 2015 by modification type: ($ in thousands) Modification Type Principal (1) Principal and Interest (2) Interest Rate Reduction Other Total March 31, 2016 CRE $ 13,725 $ — $ — $ 28 $ 13,753 C&I 19,166 — 3,615 3,934 26,715 Residential 273 — — — 273 Consumer 343 — — — 343 Total $ 33,507 $ — $ 3,615 $ 3,962 $ 41,084 ($ in thousands) Modification Type Principal (1) Principal and Interest (2) Interest Rate Reduction Other Total March 31, 2015 CRE $ — $ 833 $ — $ — $ 833 C&I 164 — — — 164 Residential 281 — — — 281 Consumer — — — — — Total $ 445 $ 833 $ — $ — $ 1,278 (1) Principal modification includes forbearance payments, term extensions and principal deferments that modify the terms of the loan from principal and interest payments to interest payments only. (2) Principal and interest modification includes principal and interest deferments or reductions. The following table presents information for loans modified as TDRs within the previous 12 months that have subsequently defaulted during the three months ended March 31, 2016 and 2015 , and are still in default at period end: Loans Modified as TDRs that Subsequently Defaulted During the Three Months Ended March 31, 2016 2015 ($ in thousands) Number of Recorded Number of Recorded C&I: Commercial business 4 $ 954 — $ —
Summary of non-PCI impaired loans	The following tables present information on impaired non-PCI loans as of March 31, 2016 and December 31, 2015 : ($ in thousands) Unpaid Principal Balance Recorded Investment With No Allowance Recorded Investment With Allowance Total Recorded Investment Related Allowance March 31, 2016 CRE: Income producing $ 78,858 $ 63,561 $ 7,725 $ 71,286 $ 351 Land 7,062 5,522 1,279 6,801 111 C&I: Commercial business 105,973 31,716 61,401 93,117 16,888 Trade finance 12,425 8,083 4,318 12,401 43 Residential: Single-family 19,759 6,085 12,077 18,162 548 Multifamily 23,968 16,129 6,082 22,211 267 Consumer 1,630 — 1,628 1,628 57 Total $ 249,675 $ 131,096 $ 94,510 $ 225,606 $ 18,265 ($ in thousands) Unpaid Principal Balance Recorded Investment With No Allowance Recorded Investment With Allowance Total Recorded Investment Related Allowance December 31, 2015 CRE: Income producing $ 47,043 $ 24,347 $ 15,720 $ 40,067 $ 3,148 Construction 66 — 14 14 1 Land 1,537 632 683 1,315 118 C&I: Commercial business 81,720 31,045 40,111 71,156 15,993 Trade finance 10,675 — 10,675 10,675 95 Residential: Single-family 16,486 4,401 10,611 15,012 584 Multifamily 25,634 16,944 6,783 23,727 339 Consumer 1,240 — 1,240 1,240 60 Total $ 184,401 $ 77,369 $ 85,837 $ 163,206 $ 20,338
Schedule of average recorded investment and amount of interest income on non-PCI impaired loans	The following table presents the average recorded investment and interest income recognized on non-PCI impaired loans during the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Average Recorded Investment Recognized Interest Income (1) Average Recognized Interest Income (1) CRE: Income producing $ 72,248 $ 391 $ 44,195 $ 141 Construction — — 3,902 — Land 6,908 9 3,438 10 C&I: Commercial business 92,707 369 39,310 202 Trade finance 13,756 66 245 3 Residential: Single-family 18,318 65 15,423 68 Multifamily 22,338 77 26,987 203 Consumer 1,635 16 1,258 12 Total impaired non-PCI loans $ 227,910 $ 993 $ 134,758 $ 639 (1) Includes interest recognized on accruing non-PCI TDRs. Interest payments received on nonaccrual non-PCI loans are reflected as a reduction to principal and not as interest income.
Summary of the activity in the allowance for credit losses by portfolio segment	The following tables present a summary of activities in the allowance for loan losses by portfolio segment for the three months ended March 31, 2016 and 2015 : ($ in thousands) Non-PCI Loans PCI Loans CRE C&I Residential Consumer Total Total Three Months Ended March 31, 2016 Beginning balance $ 81,191 $ 134,597 $ 39,292 $ 9,520 $ 264,600 $ 359 $ 264,959 Provision for (reversal of) loan losses 1,306 4,654 (5,317 ) (226 ) 417 (31 ) 386 Charge-offs (56 ) (5,860 ) (137 ) (1 ) (6,054 ) — (6,054 ) Recoveries 97 686 97 67 947 — 947 Net recoveries (charge-offs) 41 (5,174 ) (40 ) 66 (5,107 ) — (5,107 ) Ending balance $ 82,538 $ 134,077 $ 33,935 $ 9,360 $ 259,910 $ 328 $ 260,238 ($ in thousands) Non-PCI Loans PCI Loans CRE C&I Residential Consumer Total Total Three Months Ended March 31, 2015 Beginning balance $ 72,263 $ 134,598 $ 43,856 $ 10,248 $ 260,965 $ 714 $ 261,679 (Reversal of) provision for loan losses (2,333 ) 5,378 (1,571 ) 664 2,138 (71 ) 2,067 Charge-offs (1,002 ) (6,589 ) (746 ) (463 ) (8,800 ) — (8,800 ) Recoveries 812 527 1,451 2 2,792 — 2,792 Net (charge-offs) recoveries (190 ) (6,062 ) 705 (461 ) (6,008 ) — (6,008 ) Ending balance $ 69,740 $ 133,914 $ 42,990 $ 10,451 $ 257,095 $ 643 $ 257,738 For further information on accounting policies and the methodology used to estimate the allowance for credit losses and loan charge-offs, please see Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements of the Company’s 2015 Form 10-K. The following table presents a summary of activities in the allowance for unfunded credit reserves during the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Beginning balance $ 20,360 $ 12,712 Provision for unfunded credit reserves 1,054 2,920 Ending balance $ 21,414 $ 15,632
Allowance for loan losses and recorded investment in total loans receivable by portfolio segment, disaggregated by impairment methodology	The following tables present the Company’s allowance for loan losses and recorded investments by portfolio segment and impairment methodology as of March 31, 2016 and December 31, 2015 : ($ in thousands) CRE C&I Residential Consumer Total As of March 31, 2016 Allowance for loan losses Individually evaluated for impairment $ 462 $ 16,931 $ 815 $ 57 $ 18,265 Collectively evaluated for impairment 82,076 117,146 33,120 9,303 241,645 Acquired with deteriorated credit quality 314 10 4 — 328 Ending balance $ 82,852 $ 134,087 $ 33,939 $ 9,360 $ 260,238 Recorded investment in loans Individually evaluated for impairment $ 78,087 $ 105,518 $ 40,373 $ 1,628 $ 225,606 Collectively evaluated for impairment 7,870,738 8,659,257 4,123,568 2,021,893 22,675,456 Acquired with deteriorated credit quality (1) 502,653 53,468 287,457 23,263 866,841 Ending balance (1) $ 8,451,478 $ 8,818,243 $ 4,451,398 $ 2,046,784 $ 23,767,903 ($ in thousands) CRE C&I Residential Consumer Total As of December 31, 2015 Allowance for loan losses Individually evaluated for impairment $ 3,267 $ 16,088 $ 923 $ 60 $ 20,338 Collectively evaluated for impairment 77,924 118,509 38,369 9,460 244,262 Acquired with deteriorated credit quality 347 9 3 — 359 Ending balance $ 81,538 $ 134,606 $ 39,295 $ 9,520 $ 264,959 Recorded investment in loans Individually evaluated for impairment $ 41,396 $ 81,831 $ 38,739 $ 1,240 $ 163,206 Collectively evaluated for impairment 7,519,988 8,861,960 4,213,265 1,930,588 22,525,801 Acquired with deteriorated credit quality (1) 549,365 59,216 337,910 24,263 970,754 Ending balance (1) $ 8,110,749 $ 9,003,007 $ 4,589,914 $ 1,956,091 $ 23,659,761 (1) Loans net of ASC 310-30 discount.
Summary of changes in the accretable yield for the PCI loans	The following table presents the changes in accretable yield for PCI loans for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Beginning balance $ 214,907 $ 311,688 Accretion (22,429 ) (30,569 ) Changes in expected cash flows (6,487 ) 12,036 Ending balance $ 185,991 $ 293,155

INVESTMENTS IN QUALIFIED AFFO29

INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET (Tables)	3 Months Ended
	Mar. 31, 2016
INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET
Schedule of investments in qualified affordable housing partnerships and related unfunded commitments	The following table presents the balances of the Company’s investments in qualified affordable housing partnerships, net and related unfunded commitments as of the periods indicated: ($ in thousands) March 31, December 31, Investments in qualified affordable housing partnerships, net $ 186,999 $ 193,978 Accrued expenses and other liabilities — Unfunded commitments $ 57,936 $ 61,525
Schedule of other information related to investments in qualified affordable housing partnership	The following table presents additional information related to the Company’s investments in qualified affordable housing partnerships, net for the periods indicated: ($ in thousands) Three Months Ended March 31, 2016 2015 Tax credits and other tax benefits recognized $ 9,452 $ 8,775 Amortization expense included in income tax expense $ 6,966 $ 6,244

GOODWILL AND OTHER INTANGIBLE30

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of finite-lived intangible assets	The following table presents the gross carrying value of intangible assets and accumulated amortization as of March 31, 2016 and December 31, 2015 : ($ in thousands) March 31, December 31, Gross balance $ 108,814 $ 108,814 Accumulated amortization 74,843 72,739 Net carrying balance $ 33,971 $ 36,075
Estimated future amortization expense	The following table presents the estimated future amortization expense of premiums on acquired deposits: Year Ended December 31, Amount ($ in thousands) Remainder of 2016 $ 5,982 2017 6,935 2018 5,883 2019 4,864 2020 3,846 Thereafter 6,461 Total $ 33,971

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of credit-related commitments	The following table presents the Company’s credit-related commitments as of the periods indicated: ($ in thousands) March 31, December 31, Loan commitments $ 3,859,835 $ 3,370,271 Commercial letters of credit and SBLCs $ 1,254,590 $ 1,293,547

STOCK COMPENSATION PLANS (Table

STOCK COMPENSATION PLANS (Tables)	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of stock compensation expense and related net tax benefit	The following table presents the total stock compensation expense and the related net tax benefit associated with the Company’s various employee share-based compensation plans for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Stock compensation costs $ 4,575 $ 3,954 Net tax benefit recognized in equity for stock compensation plans $ 986 $ 3,145
Schedule of share-based compensation, time-based and performance-based restricted stock awards activity	The following table presents a summary of the activity for the Company’s time-based and performance-based RSUs for the three months ended March 31, 2016 based on the target amount of awards: Three Months Ended March 31, 2016 Time-Based RSUs Performance-Based RSUs Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Outstanding at beginning of period 933,312 $ 36.83 389,358 $ 34.21 Granted 482,251 31.32 159,407 29.18 Vested (111,724 ) 25.08 (138,019 ) 25.25 Forfeited (21,191 ) 35.97 — — Outstanding at end of period 1,282,648 $ 35.80 410,746 $ 35.27

STOCKHOLDERS' EQUITY AND EARN33

STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2016
STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE
Earnings per share calculations	The following table presents EPS calculations for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, ($ in thousands, except per share data, shares in thousands) 2016 2015 Basic Net income $ 107,516 $ 100,027 Less: Earnings allocated to participating securities — 3 Net income allocated to common stockholders $ 107,516 $ 100,024 Basic weighted average number of shares outstanding 143,958 143,655 Basic EPS $ 0.75 $ 0.70 Diluted Net income allocated to diluted common stockholders $ 107,516 $ 100,024 Basic weighted average number of shares outstanding 143,958 143,655 Diluted potential common shares (1) 845 694 Diluted weighted average number of shares outstanding 144,803 144,349 Diluted EPS $ 0.74 $ 0.69 (1) Includes dilutive shares from RSUs and warrants for the three months ended March 31, 2016 and 2015. Also includes dilutive shares from stock options for the three months ended March 31, 2015 .

ACCUMULATED OTHER COMPREHENSI34

ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Schedule of accumulated other comprehensive income (loss) balances	The following table presents the changes in the components of AOCI balances for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Available- for-Sale Investment Securities Foreign Currency Translation Adjustments (1) Total Available- for-Sale Investment Securities Total Beginning balance $ (6,144 ) $ (8,797 ) $ (14,941 ) $ 4,237 $ 4,237 Net unrealized gains (losses) arising during the period 15,142 (33 ) 15,109 11,872 11,872 Amounts reclassified from AOCI (2,226 ) — (2,226 ) (2,554 ) (2,554 ) Changes, net of taxes 12,916 (33 ) 12,883 9,318 9,318 Ending balance $ 6,772 $ (8,830 ) $ (2,058 ) $ 13,555 $ 13,555 (1) Represents foreign currency translation adjustments related to the Company’s net investment in non-U.S. operations, including related hedges. In the third quarter of 2015, there was a change in functional currency from USD to the local currency of the Company’s foreign subsidiary.
Schedule of components of other comprehensive income (loss), reclassifications to net income by income statement line item and the related tax effects	The following table presents the components of other comprehensive income, reclassifications to net income and the related tax effects for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 2015 Before-Tax Tax Net-of-Tax Before-Tax Tax Net-of-Tax Available-for-sale investment securities: Net unrealized gains arising during the period $ 26,130 $ (10,988 ) $ 15,142 $ 20,470 $ (8,598 ) $ 11,872 Net realized gains reclassified into net income (1) (3,842 ) 1,616 (2,226 ) (4,404 ) 1,850 (2,554 ) Net change 22,288 (9,372 ) 12,916 16,066 (6,748 ) 9,318 Foreign currency translation adjustments: Net unrealized losses arising during period (33 ) — (33 ) — — — Net change (33 ) — (33 ) — — — Other comprehensive income $ 22,255 $ (9,372 ) $ 12,883 $ 16,066 $ (6,748 ) $ 9,318 (1) For the three months ended March 31, 2016 , and 2015 , the pretax amount was reported in Net gains on sales of available-for-sale investment securities in the Consolidated Statements of Income.

BUSINESS SEGMENTS (Tables)

BUSINESS SEGMENTS (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Operating results and key financial measures for operating segments	The following tables present the operating results and other key financial measures for the individual operating segments as of and for the three months ended March 31, 2016 and 2015 : ($ in thousands) Three Months Ended March 31, 2016 Retail Banking Commercial Banking Other Total Interest income $ 77,371 $ 177,082 $ 21,719 $ 276,172 Charge for funds used (22,652 ) (53,791 ) (11,837 ) (88,280 ) Interest spread on funds used 54,719 123,291 9,882 187,892 Interest expense (14,606 ) (4,026 ) (5,336 ) (23,968 ) Credit on funds provided 72,431 9,977 5,872 88,280 Interest spread on funds provided 57,825 5,951 536 64,312 Net interest income $ 112,544 $ 129,242 $ 10,418 $ 252,204 (Reversal of) provision for credit losses $ (1,582 ) $ 3,022 $ — $ 1,440 Depreciation, amortization and (accretion), net $ 43 $ (10,773 ) $ 23,488 $ 12,758 Segment pretax profit $ 45,945 $ 92,829 $ 5,897 $ 144,671 Segment assets $ 7,203,470 $ 17,939,537 $ 7,966,162 $ 33,109,169 ($ in thousands) Three Months Ended March 31, 2015 Retail Commercial Other Total Interest income $ 87,446 $ 158,786 $ 17,029 $ 263,261 Charge for funds used (23,298 ) (37,351 ) (9,445 ) (70,094 ) Interest spread on funds used 64,148 121,435 7,584 193,167 Interest expense (12,224 ) (4,263 ) (11,057 ) (27,544 ) Credit on funds provided 57,668 8,016 4,410 70,094 Interest spread on funds provided 45,444 3,753 (6,647 ) 42,550 Net interest income $ 109,592 $ 125,188 $ 937 $ 235,717 Provision for credit losses $ 731 $ 4,256 $ — $ 4,987 Depreciation, amortization and (accretion), net (1) $ 1,682 $ (10,477 ) $ 12,922 $ 4,127 Segment pretax profit $ 52,935 $ 93,175 $ 716 $ 146,826 Segment assets $ 7,540,501 $ 15,491,368 $ 6,874,966 $ 29,906,835 (1) Includes amortization and accretion related to the FDIC indemnification asset/net payable to the FDIC.

BASIS OF PRESENTATION (Details)

BASIS OF PRESENTATION (Details)	Mar. 31, 2016trust
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of wholly-owned subsidiaries that are statutory business trusts (the Trusts)	6

FAIR VALUE MEASUREMENT AND FA37

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investment securities available-for-sale
Total available-for-sale investment securities	$ 3,205,238	$ 3,773,226
U.S. Treasury securities
Investment securities available-for-sale
Total available-for-sale investment securities	516,755	998,515
U.S. government agency and U.S. government sponsored enterprise debt securities
Investment securities available-for-sale
Total available-for-sale investment securities	788,935	768,849
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Investment securities available-for-sale
Total available-for-sale investment securities	326,987	351,662
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Investment securities available-for-sale
Total available-for-sale investment securities	935,099	997,396
Municipal securities
Investment securities available-for-sale
Total available-for-sale investment securities	159,426	175,649
Non-agency residential mortgage-backed securities | Investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	59,899	62,393
Corporate debt securities | Investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	365,905	364,713
Corporate debt securities | Non-investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	7,924	9,642
Other securities
Investment securities available-for-sale
Total available-for-sale investment securities	44,308	44,407
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Investment securities available-for-sale
Total available-for-sale investment securities	552,967	1,034,150
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities
Investment securities available-for-sale
Total available-for-sale investment securities	516,755	998,515
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other securities
Investment securities available-for-sale
Total available-for-sale investment securities	36,212	35,635
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Investment securities available-for-sale
Total available-for-sale investment securities	2,652,271	2,739,076
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swaps on certificates of deposit
Derivative
Derivative assets	54
Derivative liabilities	(1,038)	(5,213)
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency forward contracts
Derivative
Derivative assets		2,365
Derivative liabilities	(430)
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swaps and options
Derivative
Derivative assets	129,599	67,215
Derivative liabilities	(130,420)	(67,325)
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign exchange contracts
Derivative
Derivative assets	8,817	10,254
Derivative liabilities	(6,196)	(9,350)
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Credit risk participation agreements (“RPAs”)
Derivative
Derivative liabilities	(11)	(4)
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government sponsored enterprise debt securities
Investment securities available-for-sale
Total available-for-sale investment securities	788,935	768,849
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Investment securities available-for-sale
Total available-for-sale investment securities	326,987	351,662
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Investment securities available-for-sale
Total available-for-sale investment securities	935,099	997,396
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal securities
Investment securities available-for-sale
Total available-for-sale investment securities	159,426	175,649
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency residential mortgage-backed securities | Investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	59,899	62,393
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities | Investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	365,905	364,713
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities | Non-investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	7,924	9,642
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other securities
Investment securities available-for-sale
Total available-for-sale investment securities	8,096	8,772
Fair Value, Measurements, Recurring | Fair Value Measurements
Investment securities available-for-sale
Total available-for-sale investment securities	3,205,238	3,773,226
Fair Value, Measurements, Recurring | Fair Value Measurements | Interest rate swaps on certificates of deposit
Derivative
Derivative assets	54
Derivative liabilities	(1,038)	(5,213)
Fair Value, Measurements, Recurring | Fair Value Measurements | Foreign currency forward contracts
Derivative
Derivative assets		2,365
Derivative liabilities	(430)
Fair Value, Measurements, Recurring | Fair Value Measurements | Interest rate swaps and options
Derivative
Derivative assets	129,599	67,215
Derivative liabilities	(130,420)	(67,325)
Fair Value, Measurements, Recurring | Fair Value Measurements | Foreign exchange contracts
Derivative
Derivative assets	8,817	10,254
Derivative liabilities	(6,196)	(9,350)
Fair Value, Measurements, Recurring | Fair Value Measurements | Credit risk participation agreements (“RPAs”)
Derivative
Derivative liabilities	(11)	(4)
Fair Value, Measurements, Recurring | Fair Value Measurements | U.S. Treasury securities
Investment securities available-for-sale
Total available-for-sale investment securities	516,755	998,515
Fair Value, Measurements, Recurring | Fair Value Measurements | U.S. government agency and U.S. government sponsored enterprise debt securities
Investment securities available-for-sale
Total available-for-sale investment securities	788,935	768,849
Fair Value, Measurements, Recurring | Fair Value Measurements | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Investment securities available-for-sale
Total available-for-sale investment securities	326,987	351,662
Fair Value, Measurements, Recurring | Fair Value Measurements | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Investment securities available-for-sale
Total available-for-sale investment securities	935,099	997,396
Fair Value, Measurements, Recurring | Fair Value Measurements | Municipal securities
Investment securities available-for-sale
Total available-for-sale investment securities	159,426	175,649
Fair Value, Measurements, Recurring | Fair Value Measurements | Non-agency residential mortgage-backed securities | Investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	59,899	62,393
Fair Value, Measurements, Recurring | Fair Value Measurements | Corporate debt securities | Investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	365,905	364,713
Fair Value, Measurements, Recurring | Fair Value Measurements | Corporate debt securities | Non-investment grade
Investment securities available-for-sale
Total available-for-sale investment securities	7,924	9,642
Fair Value, Measurements, Recurring | Fair Value Measurements | Other securities
Investment securities available-for-sale
Total available-for-sale investment securities	$ 44,308	$ 44,407

FAIR VALUE MEASUREMENT AND FA38

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) - Fair Value, Measurements, Recurring - Fair Value Measurements (Level 3) $ in Thousands	3 Months Ended
	Mar. 31, 2015USD ($)
Embedded derivative liabilities
Reconciliation of the beginning and ending balances for major liability categories measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Beginning balance	$ (3,392)
Total gains (losses) for the period:
Included in earnings	(20)
Ending balance	(3,412)
Change in unrealized losses included in earnings relating to assets and liabilities held for the period	(20)
Corporate debt securities | Non-investment grade
Reconciliation of the beginning and ending balances for major asset categories measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Beginning balance	6,528
Total gains (losses) for the period:
Included in earnings	960
Included in other comprehensive income	922
Sales and settlements:
Sales	(7,219)
Settlements	(98)
Transfers in and/or out of Level 3	(1,093)
Ending balance	0
Change in unrealized losses included in earnings relating to assets and liabilities held for the period	$ 0

FAIR VALUE MEASUREMENT AND FA39

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held for sale	$ 28,795	$ 29,238
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held for sale	28,795	29,238
Non-PCI loans | Loans Receivable
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	80,850	70,462
Non-PCI loans | Loans Receivable | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	80,850	70,462
Non-PCI loans | Loans Receivable | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	13,147	17,252
Non-PCI loans | Loans Receivable | CRE | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	13,147	17,252
Non-PCI loans | Loans Receivable | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	48,788	35,558
Non-PCI loans | Loans Receivable | C&I | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	48,788	35,558
Non-PCI loans | Loans Receivable | Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	17,345	16,472
Non-PCI loans | Loans Receivable | Residential | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	17,345	16,472
Non-PCI loans | Loans Receivable | Consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	1,570	1,180
Non-PCI loans | Loans Receivable | Consumer | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	1,570	1,180
OREO
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	3,490	4,929
OREO | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	$ 3,490	$ 4,929

FAIR VALUE MEASUREMENT AND FA40

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 4) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Loans held for sale
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	$ (2,400,000)	$ 0
Fair Value, Measurements, Nonrecurring | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	(461,000)	(277,000)
Fair Value, Measurements, Nonrecurring | Loans held for sale
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	(2,351,000)	0
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI loans
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	163,000	(1,868,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI loans | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	2,178,000	841,000
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI loans | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	(1,935,000)	(2,470,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI loans | Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	(83,000)	(239,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI loans | Consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in value of assets	$ 3,000	$ 0

FAIR VALUE MEASUREMENT AND FA41

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 5) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
OREO
Quantitative information
OREO	$ 3,490	$ 4,929
Loans Receivable | Non-PCI loans
Quantitative information
Impaired loans	80,850	70,462
Significant Unobservable Inputs (Level 3) | OREO
Quantitative information
OREO	3,490	4,929
Significant Unobservable Inputs (Level 3) | OREO | Appraisal
Quantitative information
OREO	$ 3,490	$ 4,929
Selling cost (as a percent)	8.00%	8.00%
Significant Unobservable Inputs (Level 3) | OREO | Appraisal | Weighted Average
Quantitative information
Selling cost (as a percent)	8.00%	8.00%
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans
Quantitative information
Impaired loans	$ 80,850	$ 70,462
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Discounted cash flow
Quantitative information
Impaired loans	$ 40,719	$ 27,522
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Discounted cash flow | Minimum
Quantitative information
Discount rate (as a percent)	0.00%	0.00%
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Discounted cash flow | Maximum
Quantitative information
Discount rate (as a percent)	84.00%	87.00%
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Discounted cash flow | Weighted Average
Quantitative information
Discount rate (as a percent)	23.00%	30.00%
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Market comparables
Quantitative information
Impaired loans	$ 40,131	$ 42,940
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Market comparables | Minimum
Quantitative information
Discount rate (as a percent)	0.00%	0.00%
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Market comparables | Maximum
Quantitative information
Discount rate (as a percent)	43.00%	100.00%
Significant Unobservable Inputs (Level 3) | Loans Receivable | Non-PCI loans | Market comparables | Weighted Average
Quantitative information
Discount rate (as a percent)	12.00%	17.00%

FAIR VALUE MEASUREMENT AND FA42

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 6) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Financial assets:
Cash and cash equivalents	$ 2,265,297	$ 1,360,887	$ 1,886,199	$ 1,039,885
Short-term investments	305,548	299,916
Resale agreements	1,800,000	1,600,000
Held-to-maturity investment security, at cost (fair value of $160,135 in 2016)	160,135	0
Loans held for sale	28,795	31,958
Loans receivable, net	23,494,126	23,378,789
Investment in FHLB stock	18,157	28,770
Investment in Federal Reserve Bank stock	55,079	54,932
Customer deposit accounts:
Short-term borrowings	10,093	0
FHLB advances	319,973	1,019,424
Repurchase agreements	200,000	0
Long-term debt	201,102	206,084
Gross repurchase agreements	450,000	450,000
Carrying amount of repurchase agreements eligible for netting against resale agreements	250,000	450,000
Carrying Amount
Financial assets:
Cash and cash equivalents	2,265,297	1,360,887
Short-term investments	305,548	299,916
Resale agreements	1,800,000	1,600,000
Held-to-maturity investment security, at cost (fair value of $160,135 in 2016)	160,135
Loans held for sale	28,795	31,958
Loans receivable, net	23,494,126	23,378,789
Investment in FHLB stock	18,157	28,770
Investment in Federal Reserve Bank stock	55,079	54,932
Accrued interest receivable	88,804	89,243
Customer deposit accounts:
Demand, savings and money market deposits	22,531,531	20,859,086
Time deposits	6,064,716	6,616,895
Short-term borrowings	10,093
FHLB advances	319,973	1,019,424
Repurchase agreements	200,000
Accrued interest payable	8,507	8,848
Long-term debt	201,102	206,084
Fair Value Measurements
Financial assets:
Cash and cash equivalents	2,265,297	1,360,887
Short-term investments	305,548	299,916
Resale agreements	1,571,665	1,533,961
Held-to-maturity investment security, at cost (fair value of $160,135 in 2016)	160,135
Loans held for sale	28,795	31,958
Loans receivable, net	23,344,433	23,000,817
Investment in FHLB stock	18,157	28,770
Investment in Federal Reserve Bank stock	55,079	54,932
Accrued interest receivable	88,804	89,243
Customer deposit accounts:
Demand, savings and money market deposits	22,531,531	20,859,086
Time deposits	6,063,265	6,606,942
Short-term borrowings	10,093
FHLB advances	332,474	1,032,000
Repurchase agreements	271,367
Accrued interest payable	8,507	8,848
Long-term debt	194,189	186,593
Fair Value Measurements | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	2,265,297	1,360,887
Fair Value Measurements | Significant Other Observable Inputs (Level 2)
Financial assets:
Short-term investments	305,548	299,916
Resale agreements	1,571,665	1,533,961
Loans held for sale	28,795	31,958
Investment in FHLB stock	18,157	28,770
Investment in Federal Reserve Bank stock	55,079	54,932
Accrued interest receivable	88,804	89,243
Customer deposit accounts:
Demand, savings and money market deposits	22,531,531	20,859,086
Time deposits	6,063,265	6,606,942
Short-term borrowings	10,093
FHLB advances	332,474	1,032,000
Repurchase agreements	271,367
Accrued interest payable	8,507	8,848
Long-term debt	194,189	186,593
Fair Value Measurements | Significant Unobservable Inputs (Level 3)
Financial assets:
Held-to-maturity investment security, at cost (fair value of $160,135 in 2016)	160,135
Loans receivable, net	$ 23,344,433	$ 23,000,817

FAIR VALUE MEASUREMENT AND FA43

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 7)	3 Months Ended
	Mar. 31, 2016
Loans Receivable | Non-PCI loans
Fair Values of Financial Assets
Period for updated appraisals and evaluations	12 months

SECURITIES PURCHASED UNDER RE44

SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Resale agreements
Resale agreements, gross	$ 2,050,000	$ 2,050,000
Weighted average interest rates	1.70%	1.61%

SECURITIES PURCHASED UNDER RE45

SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Repurchase agreements
Gross repurchase agreements	$ 450,000	$ 450,000
Weighted average interest rates (as a percent)	2.87%	2.60%

SECURITIES PURCHASED UNDER RE46

SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS (Details 3) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets, Resale Agreements
Gross Amounts of Recognized Assets	$ 2,050,000	$ 2,050,000
Gross Amounts Offset on the Consolidated Balance Sheets	(250,000)	(450,000)
Net Amounts of Assets Presented on the Consolidated Balance Sheets	1,800,000	1,600,000
Gross Amounts Not Offset on the Consolidated Balance Sheets
Financial Instruments	0	0
Collateral Received	(1,797,373)	(1,593,503)
Net Amount	2,627	6,497
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	450,000	450,000
Gross Amounts Offset on the Consolidated Balance Sheets	(250,000)	(450,000)
Net Amounts of Liabilities Presented on the Consolidated Balance Sheets	200,000	0
Gross Amounts Not Offset on the Consolidated Balance Sheets
Financial Instruments	0	0
Collateral Posted	(200,000)	0
Net Amount	$ 0	$ 0

INVESTMENT SECURITIES (Details)

INVESTMENT SECURITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities
Amortized Cost	$ 3,193,553	$ 3,783,829
Gross Unrealized Gains	21,206	11,744
Gross Unrealized Losses	(9,521)	(22,347)
Available-for-sale investment securities, at fair value	3,205,238	3,773,226
Schedule of Held-to-maturity Securities
Amortized Cost	160,135	0
Fair Value	160,135	0
Investment Securities
Amortized Cost	3,353,688
Gross Unrealized Gains	21,206
Gross Unrealized Losses	(9,521)
Fair Value	3,365,373
U.S. Treasury securities
Schedule of Available-for-sale Securities
Amortized Cost	514,827	1,002,874
Gross Unrealized Gains	2,002	33
Gross Unrealized Losses	(74)	(4,392)
Available-for-sale investment securities, at fair value	516,755	998,515
U.S. government agency and U.S. government sponsored enterprise debt securities
Schedule of Available-for-sale Securities
Amortized Cost	787,846	771,288
Gross Unrealized Gains	1,671	555
Gross Unrealized Losses	(582)	(2,994)
Available-for-sale investment securities, at fair value	788,935	768,849
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	325,071	354,418
Gross Unrealized Gains	3,132	268
Gross Unrealized Losses	(1,216)	(3,024)
Available-for-sale investment securities, at fair value	326,987	351,662
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	927,989	996,255
Gross Unrealized Gains	9,421	7,542
Gross Unrealized Losses	(2,311)	(6,401)
Available-for-sale investment securities, at fair value	935,099	997,396
Municipal securities
Schedule of Available-for-sale Securities
Amortized Cost	156,327	173,785
Gross Unrealized Gains	3,254	2,657
Gross Unrealized Losses	(155)	(793)
Available-for-sale investment securities, at fair value	159,426	175,649
Non-agency residential mortgage-backed securities | Investment grade
Schedule of Available-for-sale Securities
Amortized Cost	58,960	62,133
Gross Unrealized Gains	1,015	433
Gross Unrealized Losses	(76)	(173)
Available-for-sale investment securities, at fair value	59,899	62,393
Corporate debt securities | Investment grade
Schedule of Available-for-sale Securities
Amortized Cost	368,206	366,921
Gross Unrealized Gains	212	132
Gross Unrealized Losses	(2,513)	(2,340)
Available-for-sale investment securities, at fair value	365,905	364,713
Corporate debt securities | Non-investment grade
Schedule of Available-for-sale Securities
Amortized Cost	10,191	11,491
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,267)	(1,849)
Available-for-sale investment securities, at fair value	7,924	9,642
Other securities
Schedule of Available-for-sale Securities
Amortized Cost	44,136	44,664
Gross Unrealized Gains	499	124
Gross Unrealized Losses	(327)	(381)
Available-for-sale investment securities, at fair value	44,308	$ 44,407
Non-agency commercial mortgage-backed security
Schedule of Held-to-maturity Securities
Amortized Cost	160,135
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	$ 160,135

INVESTMENT SECURITIES (Details

INVESTMENT SECURITIES (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value
Less Than 12 Months	$ 926,204	$ 2,527,519
12 Months or More	246,023	228,733
Total	1,172,227	2,756,252
Gross Unrealized Losses
Less Than 12 Months	(3,887)	(16,075)
12 Months or More	(5,634)	(6,272)
Total	(9,521)	(22,347)
U.S. Treasury securities
Fair Value
Less Than 12 Months	60,855	907,400
12 Months or More	30,570	20,282
Total	91,425	927,682
Gross Unrealized Losses
Less Than 12 Months	(42)	(4,250)
12 Months or More	(32)	(142)
Total	(74)	(4,392)
U.S. government agency and U.S. government sponsored enterprise debt securities
Fair Value
Less Than 12 Months	229,834	541,385
12 Months or More	9,189	0
Total	239,023	541,385
Gross Unrealized Losses
Less Than 12 Months	(571)	(2,994)
12 Months or More	(11)	0
Total	(582)	(2,994)
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Fair Value
Less Than 12 Months	103,881	252,340
12 Months or More	31,130	20,793
Total	135,011	273,133
Gross Unrealized Losses
Less Than 12 Months	(826)	(2,562)
12 Months or More	(390)	(462)
Total	(1,216)	(3,024)
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Fair Value
Less Than 12 Months	255,839	535,842
12 Months or More	45,674	58,315
Total	301,513	594,157
Gross Unrealized Losses
Less Than 12 Months	(1,381)	(4,530)
12 Months or More	(930)	(1,871)
Total	(2,311)	(6,401)
Municipal securities
Fair Value
Less Than 12 Months	5,917	48,495
12 Months or More	15,794	14,739
Total	21,711	63,234
Gross Unrealized Losses
Less Than 12 Months	(31)	(437)
12 Months or More	(124)	(356)
Total	(155)	(793)
Non-agency residential mortgage-backed securities | Investment grade
Fair Value
Less Than 12 Months	13,945	5,123
12 Months or More	6,167	6,242
Total	20,112	11,365
Gross Unrealized Losses
Less Than 12 Months	(57)	(1)
12 Months or More	(19)	(172)
Total	(76)	(173)
Corporate debt securities | Investment grade
Fair Value
Less Than 12 Months	248,730	218,944
12 Months or More	90,899	89,989
Total	339,629	308,933
Gross Unrealized Losses
Less Than 12 Months	(976)	(1,189)
12 Months or More	(1,537)	(1,151)
Total	(2,513)	(2,340)
Corporate debt securities | Non-investment grade
Fair Value
Less Than 12 Months	0	0
12 Months or More	7,924	9,642
Total	7,924	9,642
Gross Unrealized Losses
Less Than 12 Months	0	0
12 Months or More	(2,267)	(1,849)
Total	(2,267)	(1,849)
Other securities
Fair Value
Less Than 12 Months	7,203	17,990
12 Months or More	8,676	8,731
Total	15,879	26,721
Gross Unrealized Losses
Less Than 12 Months	(3)	(112)
12 Months or More	(324)	(269)
Total	$ (327)	$ (381)

INVESTMENT SECURITIES (Detail49

INVESTMENT SECURITIES (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Gross realized gains
Gross realized gains	$ 3,967	$ 4,404
Corporate debt securities | Non-investment grade
Gross realized gains
Gross realized gains		960
Investment securities available for sale
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance	0	112,338
Addition of OTTI previously not recognized	0	0
Additional increase to the amount related to the credit loss for which an OTTI was previously recognized	0	0
Reduction for securities sold	0	(5,650)
Ending balance	$ 0	$ 106,688

INVESTMENT SECURITIES (Detail50

INVESTMENT SECURITIES (Details 4) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 652,753	$ 180,501
Gross realized gains	3,967	4,404
Gross realized losses	125	0
Related tax expense	$ 1,614	$ 1,850

INVESTMENT SECURITIES (Detail51

INVESTMENT SECURITIES (Details 5) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Amortized Cost
Due within one year	$ 821,310
Due after one year through five years	712,823
Due after five years through ten years	380,657
Due after ten years	1,278,763
Total available-for-sale investment securities	3,193,553
Estimated Fair Value
Due within one year	819,156
Due after one year through five years	718,395
Due after five years through ten years	380,493
Due after ten years	1,287,194
Total available-for-sale investment securities	3,205,238	$ 3,773,226
Amortized Cost
Due after ten years	160,135
Estimated Fair Value
Due after ten years	160,135
Fair value of available-for-sale investment securities pledged	$ 1,110,000	$ 873,000

DERIVATIVES (Details)

DERIVATIVES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Derivatives designated as hedging instruments
Fair Values of Derivative Instruments
Notional Amount	$ 158,947	$ 199,503
Derivative assets	54	2,365
Derivative liabilities	1,468	5,213
Derivatives designated as hedging instruments | Interest rate swaps on certificates of deposit
Fair Values of Derivative Instruments
Notional Amount	73,496	112,913
Derivative assets	54	0
Derivative liabilities	1,038	5,213
Decrease in notional amounts	39,400
Derivatives designated as hedging instruments | Foreign currency forward contracts
Fair Values of Derivative Instruments
Notional Amount	85,451	86,590
Derivative assets	0	2,365
Derivative liabilities	430	0
Derivatives not designated as hedging instruments
Fair Values of Derivative Instruments
Notional Amount	7,452,056	7,190,926
Derivative assets	138,416	77,469
Derivative liabilities	136,627	76,679
Derivatives not designated as hedging instruments | Interest rate swaps and options
Fair Values of Derivative Instruments
Notional Amount	6,685,066	6,494,900
Derivative assets	129,599	67,215
Derivative liabilities	130,420	67,325
Derivatives not designated as hedging instruments | Foreign exchange contracts
Fair Values of Derivative Instruments
Notional Amount	724,894	652,993
Derivative assets	8,817	10,254
Derivative liabilities	6,196	9,350
Derivatives not designated as hedging instruments | Credit risk participation agreements (“RPAs”)
Fair Values of Derivative Instruments
Notional Amount	42,096	43,033
Derivative assets	0	0
Derivative liabilities	$ 11	$ 4

DERIVATIVES (Details 2)

DERIVATIVES (Details 2) - Interest Expense - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Certificates of deposits
Derivative [Line Items]
Recognized on certificates of deposit	$ (3,356)	$ (2,695)
Interest rate swaps on certificates of deposit
Derivative [Line Items]
Recognized on interest rate swaps	4,229	3,048
Net amount recognized on fair value hedges (ineffective portion)	$ 873	$ 353

DERIVATIVES (Details 3)

DERIVATIVES (Details 3) - Derivatives designated as hedging instruments - Net investment hedges - Foreign currency forward contracts - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in AOCI on net investment hedges (effective portion)	$ 1,485	$ 0
Losses recognized in Foreign exchange income (ineffective portion)	$ 880	$ 0

DERIVATIVES (Details 4)

DERIVATIVES (Details 4) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Derivative [Line Items]
Fair value of derivative assets	$ 6,470,000	$ 8,733,000
Fair value of derivative liabilities	135,938,000	78,779,000
Credit Risk-Related Contingent Feature
Additional collateral required if credit rating is downgraded below investment grade	0	0
Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative assets	138,416,000	77,469,000
Derivative liabilities	136,627,000	76,679,000
Notional Amount	7,452,056,000	7,190,926,000
Derivatives not designated as hedging instruments | Interest rate swaps and options
Derivative [Line Items]
Notional amount of derivative assets	3,340,000,000	3,250,000,000
Notional amount of derivative liabilities	3,340,000,000	3,250,000,000
Derivative assets	129,599,000	67,215,000
Derivative liabilities	130,420,000	67,325,000
Notional Amount	6,685,066,000	6,494,900,000
Derivatives not designated as hedging instruments | Short-term foreign exchange contracts
Derivative [Line Items]
Derivative assets	8,800,000	10,300,000
Derivative liabilities	6,200,000	9,400,000
Notional Amount	724,900,000	653,000,000
Derivatives not designated as hedging instruments | Credit risk participation agreements (“RPAs”)
Derivative [Line Items]
Derivative assets	0	0
Derivative liabilities	11,000	4,000
Notional Amount	42,096,000	43,033,000
Interest rate derivative exposure	$ 573,000	$ 257,000
Weighted average remaining maturity	3 years	3 years 2 months
Derivatives not designated as hedging instruments | Credit risk participation agreements (“RPAs”) | Long
Derivative [Line Items]
Notional Amount	$ 33,500,000	$ 33,700,000
Derivatives not designated as hedging instruments | Credit risk participation agreements (“RPAs”) | Short
Derivative [Line Items]
Notional Amount	$ 8,600,000	$ 9,300,000
Derivatives not designated as hedging instruments | Foreign exchange options
Derivative [Line Items]
Notional Amount			$ 50,000,000
Term of contract	5 years
Fair value of derivative assets			3,700,000
Derivatives not designated as hedging instruments | Embedded derivative liabilities
Derivative [Line Items]
Notional Amount			47,800,000
Fair value of derivative liabilities			$ 3,400,000

DERIVATIVES (Details 5)

DERIVATIVES (Details 5) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Total net income	$ 2,106	$ 772
Interest rate swaps and options | Other operating income
Derivative Instruments, Gain (Loss) [Line Items]
Total net income	(711)	(594)
Foreign exchange contracts | Foreign exchange income
Derivative Instruments, Gain (Loss) [Line Items]
Total net income	2,828	1,308
Credit risk participation agreements (“RPAs”) | Other operating income
Derivative Instruments, Gain (Loss) [Line Items]
Total net income	(11)	0
Foreign exchange options | Foreign exchange income
Derivative Instruments, Gain (Loss) [Line Items]
Total net income	0	199
Embedded derivative liabilities | Other operating expense
Derivative Instruments, Gain (Loss) [Line Items]
Total net income	$ 0	$ (141)

DERIVATIVES (Details 6)

DERIVATIVES (Details 6) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Gross Amounts of Recognized Assets	$ 6,470	$ 8,733
Gross Amounts Offset on the Consolidated Balance Sheets	0	0
Net Amounts of Assets Presented on the Consolidated Balance Sheets	6,470	8,733
Gross Amounts Not Offset on the Consolidated Balance Sheets
Financial Instruments	(5,094)	(5,293)
Collateral Received	(1,093)	(3,068)
Net Amount	283	372
Cash collateral received	1,100	3,100
Liabilities
Gross Amounts of Recognized Liabilities	135,938	78,779
Gross Amounts Offset on the Consolidated Balance Sheets	0	0
Net Amounts of Liabilities Presented on the Consolidated Balance Sheets	135,938	78,779
Gross Amounts Not Offset on the Consolidated Balance Sheets
Financial Instruments	(5,094)	(5,293)
Collateral Posted	(130,255)	(73,109)
Net Amount	589	377
Cash collateral posted	$ 39,600	$ 21,100

LOANS RECEIVABLE AND ALLOWANC58

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Allowance for loan losses	$ (260,238)	$ (264,959)
Loans, net	23,494,126	23,378,789
CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Allowance for loan losses	(82,852)	(81,538)
C&I
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Allowance for loan losses	(134,087)	(134,606)
Residential
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Allowance for loan losses	(33,939)	(39,295)
Consumer
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Allowance for loan losses	(9,360)	(9,520)
Loans Receivable
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	23,767,903	23,659,761
Unearned fees, premiums, and discounts, net	(13,539)	(16,013)
Allowance for loan losses	(260,238)	(264,959)	$ (257,738)	$ (261,679)
Loans, net	23,494,126	23,378,789
Loans Receivable | CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	8,451,478	8,110,749
Loans Receivable | CRE | Income producing
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	7,816,442	7,478,474
Loans Receivable | CRE | Construction
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	467,103	438,671
Loans Receivable | CRE | Land
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	167,933	193,604
Loans Receivable | C&I
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	8,818,243	9,003,007
Loans Receivable | C&I | Commercial business
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	8,053,535	8,213,897
Loans Receivable | C&I | Trade finance
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	764,708	789,110
Loans Receivable | Residential
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	4,451,398	4,589,914
Loans Receivable | Residential | Single-family
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	3,103,391	3,066,919
Loans Receivable | Residential | Multifamily
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	1,348,007	1,522,995
Loans Receivable | Consumer
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	2,046,784	1,956,091
Loans Receivable | Non-PCI loans
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	22,901,062	22,689,007
Unearned fees, premiums, and discounts, net	(13,539)	(16,013)
Allowance for loan losses	(259,910)	(264,600)	(257,095)	(260,965)
Loans, net	22,627,613	22,408,394
Loans Receivable | Non-PCI loans | CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	7,948,825	7,561,384
Allowance for loan losses	(82,538)	(81,191)	(69,740)	(72,263)
Loans Receivable | Non-PCI loans | CRE | Income producing
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	7,317,991	6,937,199
Loans Receivable | Non-PCI loans | CRE | Construction
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	465,763	436,776
Loans Receivable | Non-PCI loans | CRE | Land
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	165,071	187,409
Loans Receivable | Non-PCI loans | C&I
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	8,764,775	8,943,791
Allowance for loan losses	(134,077)	(134,597)	(133,914)	(134,598)
Loans Receivable | Non-PCI loans | C&I | Commercial business
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	8,001,280	8,155,991
Loans Receivable | Non-PCI loans | C&I | Trade finance
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	763,495	787,800
Loans Receivable | Non-PCI loans | Residential
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	4,163,941	4,252,004
Allowance for loan losses	(33,935)	(39,292)	(42,990)	(43,856)
Loans Receivable | Non-PCI loans | Residential | Single-family
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	2,927,219	2,877,286
Loans Receivable | Non-PCI loans | Residential | Multifamily
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	1,236,722	1,374,718
Loans Receivable | Non-PCI loans | Consumer
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	2,023,521	1,931,828
Allowance for loan losses	(9,360)	(9,520)	$ (10,451)	$ (10,248)
Loans Receivable | PCI Loans
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	866,841	970,754
Allowance for loan losses	(328)	(359)
Loans, net	866,513	970,395
Loans Receivable | PCI Loans | CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	502,653	549,365
Loans Receivable | PCI Loans | CRE | Income producing
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	498,451	541,275
Loans Receivable | PCI Loans | CRE | Construction
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	1,340	1,895
Loans Receivable | PCI Loans | CRE | Land
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	2,862	6,195
Loans Receivable | PCI Loans | C&I
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	53,468	59,216
Loans Receivable | PCI Loans | C&I | Commercial business
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	52,255	57,906
Loans Receivable | PCI Loans | C&I | Trade finance
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	1,213	1,310
Loans Receivable | PCI Loans | Residential
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	287,457	337,910
Loans Receivable | PCI Loans | Residential | Single-family
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	176,172	189,633
Loans Receivable | PCI Loans | Residential | Multifamily
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	111,285	148,277
Loans Receivable | PCI Loans | Consumer
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Total loans	$ 23,263	$ 24,263

LOANS RECEIVABLE AND ALLOWANC59

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 2) - Loans Receivable $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)property_unit	Dec. 31, 2015USD ($)
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans receivable pledged to secure borrowings and to provide additional borrowing capacity from the FHLB and the Federal Reserve Bank | $	$ 16,370	$ 15,910
Residential | Single-family
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Adjustable rate mortgage, term of initial fixed interest rates, option one	1 year
Adjustable rate mortgage, term of initial fixed interest rates, option two	3 years
Adjustable rate mortgage, term of initial fixed interest rates, option three	5 years
Residential | Single-family | Minimum
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Number of units of residential property securing fixed and adjustable rate first mortgage loans	1
Residential | Single-family | Maximum
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Number of units of residential property securing fixed and adjustable rate first mortgage loans	4
Residential | Multifamily
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Adjustable rate mortgage, term of initial fixed interest rates, option one	6 months
Adjustable rate mortgage, term of initial fixed interest rates, option two	3 years

LOANS RECEIVABLE AND ALLOWANC60

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 3) - Loans Receivable - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 23,767,903	$ 23,659,761
CRE
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,451,478	8,110,749
CRE | Income producing
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,816,442	7,478,474
CRE | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	467,103	438,671
CRE | Land
Financing Receivable, Recorded Investment [Line Items]
Total loans	167,933	193,604
C&I
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,818,243	9,003,007
C&I | Commercial business
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,053,535	8,213,897
C&I | Trade finance
Financing Receivable, Recorded Investment [Line Items]
Total loans	764,708	789,110
Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,451,398	4,589,914
Residential | Single-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,103,391	3,066,919
Residential | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,348,007	1,522,995
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,046,784	1,956,091
Non-PCI loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,901,062	22,689,007
Non-PCI loans | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,077,967	21,910,821
Non-PCI loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	262,345	287,530
Non-PCI loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	536,943	466,129
Non-PCI loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,807	24,527
Non-PCI loans | CRE
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,948,825	7,561,384
Non-PCI loans | CRE | Income producing
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,317,991	6,937,199
Non-PCI loans | CRE | Income producing | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,061,501	6,672,951
Non-PCI loans | CRE | Income producing | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	39,236	59,309
Non-PCI loans | CRE | Income producing | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	217,254	204,939
Non-PCI loans | CRE | Income producing | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non-PCI loans | CRE | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	465,763	436,776
Non-PCI loans | CRE | Construction | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	462,989	435,112
Non-PCI loans | CRE | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,339	1,194
Non-PCI loans | CRE | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	435	470
Non-PCI loans | CRE | Construction | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non-PCI loans | CRE | Land
Financing Receivable, Recorded Investment [Line Items]
Total loans	165,071	187,409
Non-PCI loans | CRE | Land | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	150,149	172,189
Non-PCI loans | CRE | Land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non-PCI loans | CRE | Land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,922	15,220
Non-PCI loans | CRE | Land | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non-PCI loans | C&I
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,764,775	8,943,791
Non-PCI loans | C&I | Commercial business
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,001,280	8,155,991
Non-PCI loans | C&I | Commercial business | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,579,392	7,794,735
Non-PCI loans | C&I | Commercial business | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	198,560	201,280
Non-PCI loans | C&I | Commercial business | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	199,521	135,449
Non-PCI loans | C&I | Commercial business | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,807	24,527
Non-PCI loans | C&I | Trade finance
Financing Receivable, Recorded Investment [Line Items]
Total loans	763,495	787,800
Non-PCI loans | C&I | Trade finance | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	730,867	750,144
Non-PCI loans | C&I | Trade finance | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,907	13,812
Non-PCI loans | C&I | Trade finance | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,721	23,844
Non-PCI loans | C&I | Trade finance | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non-PCI loans | Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,163,941	4,252,004
Non-PCI loans | Residential | Single-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,927,219	2,877,286
Non-PCI loans | Residential | Single-family | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,891,346	2,841,722
Non-PCI loans | Residential | Single-family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,728	8,134
Non-PCI loans | Residential | Single-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	28,145	27,430
Non-PCI loans | Residential | Single-family | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non-PCI loans | Residential | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,236,722	1,374,718
Non-PCI loans | Residential | Multifamily | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,185,914	1,317,550
Non-PCI loans | Residential | Multifamily | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,925	2,918
Non-PCI loans | Residential | Multifamily | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,883	54,250
Non-PCI loans | Residential | Multifamily | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Non-PCI loans | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,023,521	1,931,828
Non-PCI loans | Consumer | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,015,809	1,926,418
Non-PCI loans | Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,650	883
Non-PCI loans | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,062	4,527
Non-PCI loans | Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	866,841	970,754
PCI Loans | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	742,677	835,890
PCI Loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	15,663	7,551
PCI Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	108,501	127,313
PCI Loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | CRE
Financing Receivable, Recorded Investment [Line Items]
Total loans	502,653	549,365
PCI Loans | CRE | Income producing
Financing Receivable, Recorded Investment [Line Items]
Total loans	498,451	541,275
PCI Loans | CRE | Income producing | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	402,651	440,100
PCI Loans | CRE | Income producing | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,013	4,987
PCI Loans | CRE | Income producing | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	82,787	96,188
PCI Loans | CRE | Income producing | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | CRE | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,340	1,895
PCI Loans | CRE | Construction | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | CRE | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | CRE | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,340	1,895
PCI Loans | CRE | Construction | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | CRE | Land
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,862	6,195
PCI Loans | CRE | Land | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,272	4,285
PCI Loans | CRE | Land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | CRE | Land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	590	1,910
PCI Loans | CRE | Land | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | C&I
Financing Receivable, Recorded Investment [Line Items]
Total loans	53,468	59,216
PCI Loans | C&I | Commercial business
Financing Receivable, Recorded Investment [Line Items]
Total loans	52,255	57,906
PCI Loans | C&I | Commercial business | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	46,426	52,212
PCI Loans | C&I | Commercial business | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,185	819
PCI Loans | C&I | Commercial business | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,644	4,875
PCI Loans | C&I | Commercial business | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | C&I | Trade finance
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,213	1,310
PCI Loans | C&I | Trade finance | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,213	1,310
PCI Loans | C&I | Trade finance | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | C&I | Trade finance | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | C&I | Trade finance | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	287,457	337,910
PCI Loans | Residential | Single-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	176,172	189,633
PCI Loans | Residential | Single-family | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	170,788	184,092
PCI Loans | Residential | Single-family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,013	1,293
PCI Loans | Residential | Single-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,371	4,248
PCI Loans | Residential | Single-family | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | Residential | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	111,285	148,277
PCI Loans | Residential | Multifamily | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	97,447	130,770
PCI Loans | Residential | Multifamily | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | Residential | Multifamily | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,838	17,507
PCI Loans | Residential | Multifamily | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
PCI Loans | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,263	24,263
PCI Loans | Consumer | Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	21,880	23,121
PCI Loans | Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	452	452
PCI Loans | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	931	690
PCI Loans | Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0

LOANS RECEIVABLE AND ALLOWANC61

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 4) - Loans Receivable - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Nonaccrual and Past Due Loans
Total loans	$ 23,767,903	$ 23,659,761
Number of days a loan is past due and is placed on nonaccrual status	90 days
CRE
Nonaccrual and Past Due Loans
Total loans	$ 8,451,478	8,110,749
CRE | Income producing
Nonaccrual and Past Due Loans
Total loans	7,816,442	7,478,474
CRE | Construction
Nonaccrual and Past Due Loans
Total loans	467,103	438,671
CRE | Land
Nonaccrual and Past Due Loans
Total loans	167,933	193,604
C&I
Nonaccrual and Past Due Loans
Total loans	8,818,243	9,003,007
C&I | Commercial business
Nonaccrual and Past Due Loans
Total loans	8,053,535	8,213,897
C&I | Trade finance
Nonaccrual and Past Due Loans
Total loans	764,708	789,110
Residential
Nonaccrual and Past Due Loans
Total loans	4,451,398	4,589,914
Residential | Single-family
Nonaccrual and Past Due Loans
Total loans	3,103,391	3,066,919
Residential | Multifamily
Nonaccrual and Past Due Loans
Total loans	1,348,007	1,522,995
Consumer
Nonaccrual and Past Due Loans
Total loans	2,046,784	1,956,091
Non-PCI loans
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	42,823	53,194
Total Nonaccrual Loans	162,626	121,369
Current Accruing Loans	22,695,613	22,514,444
Total loans	22,901,062	22,689,007
Non-PCI loans | CRE
Nonaccrual and Past Due Loans
Total loans	7,948,825	7,561,384
Non-PCI loans | CRE | Income producing
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	14,433	28,721
Total Nonaccrual Loans	52,866	29,229
Current Accruing Loans	7,250,692	6,879,249
Total loans	7,317,991	6,937,199
Non-PCI loans | CRE | Construction
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Total Nonaccrual Loans	0	14
Current Accruing Loans	465,763	436,762
Total loans	465,763	436,776
Non-PCI loans | CRE | Land
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	1,970	1,124
Total Nonaccrual Loans	6,182	683
Current Accruing Loans	156,919	185,602
Total loans	165,071	187,409
Non-PCI loans | C&I
Nonaccrual and Past Due Loans
Total loans	8,764,775	8,943,791
Non-PCI loans | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	9,218	3,177
Total Nonaccrual Loans	64,364	64,735
Current Accruing Loans	7,927,698	8,088,079
Total loans	8,001,280	8,155,991
Non-PCI loans | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Total Nonaccrual Loans	8,375	0
Current Accruing Loans	755,120	787,800
Total loans	763,495	787,800
Non-PCI loans | Residential
Nonaccrual and Past Due Loans
Total loans	4,163,941	4,252,004
Non-PCI loans | Residential | Single-family
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	7,800	10,584
Total Nonaccrual Loans	11,371	8,726
Current Accruing Loans	2,908,048	2,857,976
Total loans	2,927,219	2,877,286
Non-PCI loans | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	7,261	7,301
Total Nonaccrual Loans	14,790	16,244
Current Accruing Loans	1,214,671	1,351,173
Total loans	1,236,722	1,374,718
Non-PCI loans | Consumer
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	2,141	2,287
Total Nonaccrual Loans	4,678	1,738
Current Accruing Loans	2,016,702	1,927,803
Total loans	2,023,521	1,931,828
Non-PCI loans | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	28,919	22,636
Non-PCI loans | Accruing Loans 30-59 Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	8,580	3,465
Non-PCI loans | Accruing Loans 30-59 Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI loans | Accruing Loans 30-59 Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	1,849	1,124
Non-PCI loans | Accruing Loans 30-59 Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	5,687	1,992
Non-PCI loans | Accruing Loans 30-59 Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI loans | Accruing Loans 30-59 Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	5,117	7,657
Non-PCI loans | Accruing Loans 30-59 Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	6,164	6,320
Non-PCI loans | Accruing Loans 30-59 Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	1,522	2,078
Non-PCI loans | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	13,904	30,558
Non-PCI loans | Accruing Loans 60-89 Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	5,853	25,256
Non-PCI loans | Accruing Loans 60-89 Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI loans | Accruing Loans 60-89 Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	121	0
Non-PCI loans | Accruing Loans 60-89 Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	3,531	1,185
Non-PCI loans | Accruing Loans 60-89 Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	0	0
Non-PCI loans | Accruing Loans 60-89 Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	2,683	2,927
Non-PCI loans | Accruing Loans 60-89 Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	1,097	981
Non-PCI loans | Accruing Loans 60-89 Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Accruing Past Due Loans	619	209
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	95,542	69,187
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	12,939	11,359
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	0	14
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	6,182	277
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	56,380	50,726
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	8,375	0
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	2,521	92
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	5,641	6,486
Non-PCI loans | Nonaccrual Loans Less Than 90 Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	3,504	233
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	67,084	52,182
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | CRE | Income producing
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	39,927	17,870
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | CRE | Construction
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	0	0
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | CRE | Land
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	0	406
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | C&I | Commercial business
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	7,984	14,009
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | C&I | Trade finance
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	0	0
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | Residential | Single-family
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	8,850	8,634
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | Residential | Multifamily
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	9,149	9,758
Non-PCI loans | Nonaccrual Loans 90 or More Days Past Due | Consumer
Nonaccrual and Past Due Loans
Total Nonaccrual Loans	$ 1,174	$ 1,505

LOANS RECEIVABLE AND ALLOWANC62

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 5) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Loans in process of foreclosure
Other real estate owned, net	$ 6,100	$ 7,000
Residential real estate properties
Loans in process of foreclosure
Carrying amount of foreclosed residential real estate properties included in total net OREO	628	912
Residential
Loans in process of foreclosure
Recorded investment of consumer mortgage loans for which formal foreclosure proceedings are in process	15,200	18,000
Loans Receivable | PCI Loans
Nonaccrual loans
Total Nonaccrual Loans	$ 34,300	$ 37,700

LOANS RECEIVABLE AND ALLOWANC63

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 6) - Loans Receivable - Non-PCI loans $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)loan	Mar. 31, 2015USD ($)loan
Loans Modified as TDRs
Post-Modification Outstanding Recorded Investment	$ 41,084	$ 1,278
CRE
Loans Modified as TDRs
Post-Modification Outstanding Recorded Investment	$ 13,753	$ 833
CRE | Income producing
Loans Modified as TDRs
Number of Loans | loan	2	1
Pre-Modification Outstanding Recorded Investment	$ 13,775	$ 828
Post-Modification Outstanding Recorded Investment	13,753	833
Financial Impact	0	0
C&I
Loans Modified as TDRs
Post-Modification Outstanding Recorded Investment	$ 26,715	$ 164
C&I | Commercial business
Loans Modified as TDRs
Number of Loans | loan	4	1
Pre-Modification Outstanding Recorded Investment	$ 21,614	$ 167
Post-Modification Outstanding Recorded Investment	18,632	164
Financial Impact	$ 97	32
C&I | Trade finance
Loans Modified as TDRs
Number of Loans | loan	2
Pre-Modification Outstanding Recorded Investment	$ 7,901
Post-Modification Outstanding Recorded Investment	8,083
Financial Impact	0
Residential
Loans Modified as TDRs
Post-Modification Outstanding Recorded Investment	$ 273	$ 281
Residential | Single-family
Loans Modified as TDRs
Number of Loans | loan	1	1
Pre-Modification Outstanding Recorded Investment	$ 276	$ 281
Post-Modification Outstanding Recorded Investment	273	281
Financial Impact	$ 0	2
Consumer
Loans Modified as TDRs
Number of Loans | loan	1
Pre-Modification Outstanding Recorded Investment	$ 344
Post-Modification Outstanding Recorded Investment	343	$ 0
Financial Impact	$ 1

LOANS RECEIVABLE AND ALLOWANC64

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 7) - Loans Receivable - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Modifications [Line Items]
Period beyond which a TDR generally becomes delinquent	90 days
Non-PCI loans
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 41,084	$ 1,278
Non-PCI loans | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	33,507	445
Non-PCI loans | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	833
Non-PCI loans | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,615	0
Non-PCI loans | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,962	0
Non-PCI loans | CRE
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	13,753	833
Non-PCI loans | CRE | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	13,725	0
Non-PCI loans | CRE | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	833
Non-PCI loans | CRE | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | CRE | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	28	0
Non-PCI loans | C&I
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	26,715	164
Non-PCI loans | C&I | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	19,166	164
Non-PCI loans | C&I | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | C&I | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,615	0
Non-PCI loans | C&I | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	3,934	0
Non-PCI loans | Residential
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	273	281
Non-PCI loans | Residential | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	273	281
Non-PCI loans | Residential | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Residential | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Residential | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Consumer
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	343	0
Non-PCI loans | Consumer | Principal
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	343	0
Non-PCI loans | Consumer | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Consumer | Interest Rate Reduction
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Non-PCI loans | Consumer | Other
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 0	$ 0

LOANS RECEIVABLE AND ALLOWANC65

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 8) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)loan	Mar. 31, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Additional funds committed to lend to borrowers whose terms have been modified	$ 2,500
Loans Receivable | Non-PCI loans | C&I
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	4	0
Recorded Investment	$ 954	$ 0

LOANS RECEIVABLE AND ALLOWANC66

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 9) - Loans Receivable - Non-PCI loans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Impaired loans disclosures
Unpaid Principal Balance	$ 249,675		$ 184,401
Recorded Investment With No Allowance	131,096		77,369
Recorded Investment With Allowance	94,510		85,837
Total Recorded Investment	225,606		163,206
Related Allowance	18,265		20,338
Average Recorded Investment	227,910	$ 134,758
Recognized Interest Income	993	639
CRE | Income producing
Impaired loans disclosures
Unpaid Principal Balance	78,858		47,043
Recorded Investment With No Allowance	63,561		24,347
Recorded Investment With Allowance	7,725		15,720
Total Recorded Investment	71,286		40,067
Related Allowance	351		3,148
Average Recorded Investment	72,248	44,195
Recognized Interest Income	391	141
CRE | Construction
Impaired loans disclosures
Unpaid Principal Balance			66
Recorded Investment With No Allowance			0
Recorded Investment With Allowance			14
Total Recorded Investment			14
Related Allowance			1
Average Recorded Investment	0	3,902
Recognized Interest Income	0	0
CRE | Land
Impaired loans disclosures
Unpaid Principal Balance	7,062		1,537
Recorded Investment With No Allowance	5,522		632
Recorded Investment With Allowance	1,279		683
Total Recorded Investment	6,801		1,315
Related Allowance	111		118
Average Recorded Investment	6,908	3,438
Recognized Interest Income	9	10
C&I | Commercial business
Impaired loans disclosures
Unpaid Principal Balance	105,973		81,720
Recorded Investment With No Allowance	31,716		31,045
Recorded Investment With Allowance	61,401		40,111
Total Recorded Investment	93,117		71,156
Related Allowance	16,888		15,993
Average Recorded Investment	92,707	39,310
Recognized Interest Income	369	202
C&I | Trade finance
Impaired loans disclosures
Unpaid Principal Balance	12,425		10,675
Recorded Investment With No Allowance	8,083		0
Recorded Investment With Allowance	4,318		10,675
Total Recorded Investment	12,401		10,675
Related Allowance	43		95
Average Recorded Investment	13,756	245
Recognized Interest Income	66	3
Residential | Single-family
Impaired loans disclosures
Unpaid Principal Balance	19,759		16,486
Recorded Investment With No Allowance	6,085		4,401
Recorded Investment With Allowance	12,077		10,611
Total Recorded Investment	18,162		15,012
Related Allowance	548		584
Average Recorded Investment	18,318	15,423
Recognized Interest Income	65	68
Residential | Multifamily
Impaired loans disclosures
Unpaid Principal Balance	23,968		25,634
Recorded Investment With No Allowance	16,129		16,944
Recorded Investment With Allowance	6,082		6,783
Total Recorded Investment	22,211		23,727
Related Allowance	267		339
Average Recorded Investment	22,338	26,987
Recognized Interest Income	77	203
Consumer
Impaired loans disclosures
Unpaid Principal Balance	1,630		1,240
Recorded Investment With No Allowance	0		0
Recorded Investment With Allowance	1,628		1,240
Total Recorded Investment	1,628		1,240
Related Allowance	57		$ 60
Average Recorded Investment	1,635	1,258
Recognized Interest Income	$ 16	$ 12

LOANS RECEIVABLE AND ALLOWANC67

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 10) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	$ 264,959
Ending balance	260,238
Unfunded Lending Commitments
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	20,360	$ 12,712
Provision for unfunded credit reserves	1,054	2,920
Ending balance	21,414	15,632
CRE
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	81,538
Ending balance	82,852
C&I
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	134,606
Ending balance	134,087
Residential
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	39,295
Ending balance	33,939
Consumer
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	9,520
Ending balance	9,360
PCI Loans
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	359
Ending balance	328
PCI Loans | CRE
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	347
Ending balance	314
PCI Loans | C&I
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	9
Ending balance	10
PCI Loans | Residential
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	3
Ending balance	4
PCI Loans | Consumer
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	0
Ending balance	0
Loans Receivable
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	264,959	261,679
Provision for (reversal of) loan losses	386	2,067
Charge-offs	(6,054)	(8,800)
Recoveries	947	2,792
Net recoveries (charge-offs)	(5,107)	(6,008)
Ending balance	260,238	257,738
Loans Receivable | PCI Loans
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	359	714
Provision for (reversal of) loan losses	(31)	(71)
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
Ending balance	328	643
Loans Receivable | Non-PCI loans
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	264,600	260,965
Provision for (reversal of) loan losses	417	2,138
Charge-offs	(6,054)	(8,800)
Recoveries	947	2,792
Net recoveries (charge-offs)	(5,107)	(6,008)
Ending balance	259,910	257,095
Loans Receivable | Non-PCI loans | CRE
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	81,191	72,263
Provision for (reversal of) loan losses	1,306	(2,333)
Charge-offs	(56)	(1,002)
Recoveries	97	812
Net recoveries (charge-offs)	41	(190)
Ending balance	82,538	69,740
Loans Receivable | Non-PCI loans | C&I
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	134,597	134,598
Provision for (reversal of) loan losses	4,654	5,378
Charge-offs	(5,860)	(6,589)
Recoveries	686	527
Net recoveries (charge-offs)	(5,174)	(6,062)
Ending balance	134,077	133,914
Loans Receivable | Non-PCI loans | Residential
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	39,292	43,856
Provision for (reversal of) loan losses	(5,317)	(1,571)
Charge-offs	(137)	(746)
Recoveries	97	1,451
Net recoveries (charge-offs)	(40)	705
Ending balance	33,935	42,990
Loans Receivable | Non-PCI loans | Consumer
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	9,520	10,248
Provision for (reversal of) loan losses	(226)	664
Charge-offs	(1)	(463)
Recoveries	67	2
Net recoveries (charge-offs)	66	(461)
Ending balance	$ 9,360	$ 10,451

LOANS RECEIVABLE AND ALLOWANC68

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 11) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Allowance for loan losses
Individually evaluated for impairment	$ 18,265	$ 20,338
Collectively evaluated for impairment	241,645	244,262
Allowance for loan losses	260,238	264,959
Acquired with deteriorated credit quality
Allowance for loan losses
Allowance for loan losses	328	359
CRE
Allowance for loan losses
Individually evaluated for impairment	462	3,267
Collectively evaluated for impairment	82,076	77,924
Allowance for loan losses	82,852	81,538
CRE | Acquired with deteriorated credit quality
Allowance for loan losses
Allowance for loan losses	314	347
C&I
Allowance for loan losses
Individually evaluated for impairment	16,931	16,088
Collectively evaluated for impairment	117,146	118,509
Allowance for loan losses	134,087	134,606
C&I | Acquired with deteriorated credit quality
Allowance for loan losses
Allowance for loan losses	10	9
Residential
Allowance for loan losses
Individually evaluated for impairment	815	923
Collectively evaluated for impairment	33,120	38,369
Allowance for loan losses	33,939	39,295
Residential | Acquired with deteriorated credit quality
Allowance for loan losses
Allowance for loan losses	4	3
Consumer
Allowance for loan losses
Individually evaluated for impairment	57	60
Collectively evaluated for impairment	9,303	9,460
Allowance for loan losses	9,360	9,520
Consumer | Acquired with deteriorated credit quality
Allowance for loan losses
Allowance for loan losses	0	0
Loans Receivable
Allowance for loan losses
Allowance for loan losses	260,238	264,959	$ 257,738	$ 261,679
Recorded investment in loans
Individually evaluated for impairment	225,606	163,206
Collectively evaluated for impairment	22,675,456	22,525,801
Total loans	23,767,903	23,659,761
Loans Receivable | Acquired with deteriorated credit quality
Allowance for loan losses
Allowance for loan losses	328	359	$ 643	$ 714
Recorded investment in loans
Total loans	866,841	970,754
Loans Receivable | CRE
Recorded investment in loans
Individually evaluated for impairment	78,087	41,396
Collectively evaluated for impairment	7,870,738	7,519,988
Total loans	8,451,478	8,110,749
Loans Receivable | CRE | Acquired with deteriorated credit quality
Recorded investment in loans
Total loans	502,653	549,365
Loans Receivable | C&I
Recorded investment in loans
Individually evaluated for impairment	105,518	81,831
Collectively evaluated for impairment	8,659,257	8,861,960
Total loans	8,818,243	9,003,007
Loans Receivable | C&I | Acquired with deteriorated credit quality
Recorded investment in loans
Total loans	53,468	59,216
Loans Receivable | Residential
Recorded investment in loans
Individually evaluated for impairment	40,373	38,739
Collectively evaluated for impairment	4,123,568	4,213,265
Total loans	4,451,398	4,589,914
Loans Receivable | Residential | Acquired with deteriorated credit quality
Recorded investment in loans
Total loans	287,457	337,910
Loans Receivable | Consumer
Recorded investment in loans
Individually evaluated for impairment	1,628	1,240
Collectively evaluated for impairment	2,021,893	1,930,588
Total loans	2,046,784	1,956,091
Loans Receivable | Consumer | Acquired with deteriorated credit quality
Recorded investment in loans
Total loans	$ 23,263	$ 24,263

LOANS RECEIVABLE AND ALLOWANC69

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 12) - Loans Receivable - PCI Loans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Changes in the accretable yield for the PCI loans
Beginning balance	$ 214,907	$ 311,688
Accretion	(22,429)	(30,569)
Changes in expected cash flows	(6,487)	12,036
Ending balance	$ 185,991	$ 293,155

LOANS RECEIVABLE AND ALLOWANC70

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES (Details 13) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Loans Held for Sale
Loans held for sale	$ 28,795,000		$ 31,958,000
Loans receivable reclassified to loans held for sale	308,722,000	$ 820,473,000
Write-down of loans transferred from loans held for investment to loans held for sale recorded to allowance for loan losses	1,800,000	1,700,000
Held-to-maturity investment security retained from securitization of loans	160,135,000		$ 0
Multifamily
Loans Held for Sale
Gain on securitizations	1,100,000
Mortgage servicing rights	641,000
Held-to-maturity investment security retained from securitization of loans	160,100,000
Loans securitized	201,700,000
Loans held for sale
Loans Held for Sale
LOCOM adjustment	2,400,000	0
Orginated | Multifamily residential, C&I, and CRE
Loans Held for Sale
Loans sold or securitized	256,200,000
Net gain from sale of loans held for sale during the period	4,300,000
Orginated | Single-family residential and C&I
Loans Held for Sale
Net gain from sale of loans held for sale during the period		8,600,000
Carrying value of loans sold		326,800,000
Purchased | Loans sold in secondary market
Loans Held for Sale
Net gain from sale of loans held for sale during the period	0	1,000,000
Carrying value of loans sold	$ 53,900,000	$ 343,000,000

INVESTMENTS IN QUALIFIED AFFO71

INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET
Minimum compliance period for qualified affordable housing partnerships to fully utilize the tax credits	15 years
Investments in qualified affordable housing partnerships, net	$ 186,999		$ 193,978
Accrued expenses and other liabilities — Unfunded commitments	57,936		$ 61,525
Tax credits and other tax benefits recognized	9,452	$ 8,775
Amortization expense included in income tax expense	$ 6,966	$ 6,244

INVESTMENTS IN QUALIFIED AFFO72

INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, TAX CREDIT AND OTHER INVESTMENTS, NET
Investments in tax credit and other investments	$ 170,400		$ 187,200
Total unfunded commitments for investments in tax credit and other investments	105,700		$ 113,200
Noninterest expense — amortization of tax credit and other investments	$ 14,155	$ 6,299

GOODWILL AND OTHER INTANGIBLE73

GOODWILL AND OTHER INTANGIBLE ASSETS (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2016USD ($)segment	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 469,433,000		$ 469,433,000
Number of operating segments | segment	3
Goodwill impairment			$ 0
Amortization expense	$ 2,104,000	$ 2,391,000

GOODWILL AND OTHER INTANGIBLE74

GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Gross balance	$ 108,814	$ 108,814
Accumulated amortization	74,843	72,739
Total	$ 33,971	$ 36,075

GOODWILL AND OTHER INTANGIBLE75

GOODWILL AND OTHER INTANGIBLE ASSETS (Details 3) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Year Ended December 31,
Total	$ 33,971	$ 36,075
Acquired Deposits
Year Ended December 31,
Remainder of 2016	5,982
2,017	6,935
2,018	5,883
2,019	4,864
2,020	3,846
Thereafter	6,461
Total	$ 33,971

COMMITMENTS AND CONTINGENCIES76

COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Credit Extensions
Allowance for loan losses	$ 260,238	$ 264,959
Unfunded Lending Commitments
Credit Extensions
Allowance for loan losses	21,414	20,360	$ 15,632	$ 12,712
Unfunded Lending Commitments | Accrued Expenses and Other Liabilities
Credit Extensions
Allowance for loan losses	20,800	19,800
Undisbursed Loan Commitments
Credit Extensions
Loan commitments	3,859,835	3,370,271
Commercial and Standby Letters of Credit
Credit Extensions
Commercial and standby letters of credit (“SBLCs”)	1,254,590	$ 1,293,547
Commercial Letters Of Credit
Credit Extensions
Commercial and standby letters of credit (“SBLCs”)	45,800
Standby Letters of Credit
Credit Extensions
Commercial and standby letters of credit (“SBLCs”)	$ 1,210,000

COMMITMENTS AND CONTINGENCIES77

COMMITMENTS AND CONTINGENCIES (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Commitments
Unfunded commitments in investments in AHP and other tax credit investments	$ 163,600	$ 174,700
Loans Sold or Securitized with Recourse
Guarantees
Unpaid principal amount of loans sold or securitized with recourse	$ 178,400	191,300
Recourse provision limitation, maximum percentage of the top loss on the multifamily loans	4.00%
Recourse reserve related to loan sales and securitizations totaled	$ 580	630
Loans Sold or Securitized with Full Recourse [Member]
Guarantees
Maximum potential future payments	28,300	29,800
Loans Sold or Securitized with Limited Recourse [Member]
Guarantees
Maximum potential future payments	5,400	5,900
East West Bank | F&F, LLC and 618 Investment, Inc. v. East West Bank
Litigation
Litigation accrual	$ 36,300	$ 35,400

STOCK COMPENSATION PLANS (Detai

STOCK COMPENSATION PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation costs	$ 4,575	$ 3,954
Net tax benefit recognized in equity for stock compensation plans	986	3,145
Common Stock and Additional Paid-In Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net tax benefit recognized in equity for stock compensation plans	$ 986	$ 3,145

STOCK COMPENSATION PLANS (Det79

STOCK COMPENSATION PLANS (Details 2) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Restricted stock units | Ratably
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted stock units | Cliff | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted stock units | Cliff | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Time-Based
Shares
Outstanding unvested at beginning of year (in shares) | shares	933,312
Granted (in shares) | shares	482,251
Vested (in shares) | shares	(111,724)
Forfeited (in shares) | shares	(21,191)
Outstanding unvested at end of year (in shares) | shares	1,282,648
Weighted Average Grant-Date Fair Value
Outstanding unvested at beginning of year (in dollars per share) | $ / shares	$ 36.83
Granted (in dollars per share) | $ / shares	31.32
Vested (in dollars per share) | $ / shares	25.08
Forfeited (in dollars per share) | $ / shares	35.97
Outstanding unvested at end of year (in dollars per share) | $ / shares	$ 35.80
Total unrecognized compensation cost | $	$ 34.9
Weighted average period to recognize unrecognized compensation cost	2 years 2 months 23 days
Performance-Based
Shares
Outstanding unvested at beginning of year (in shares) | shares	389,358
Granted (in shares) | shares	159,407
Vested (in shares) | shares	(138,019)
Forfeited (in shares) | shares	0
Outstanding unvested at end of year (in shares) | shares	410,746
Weighted Average Grant-Date Fair Value
Outstanding unvested at beginning of year (in dollars per share) | $ / shares	$ 34.21
Granted (in dollars per share) | $ / shares	29.18
Vested (in dollars per share) | $ / shares	25.25
Forfeited (in dollars per share) | $ / shares	0
Outstanding unvested at end of year (in dollars per share) | $ / shares	$ 35.27
Total unrecognized compensation cost | $	$ 13.3
Weighted average period to recognize unrecognized compensation cost	2 years 22 days

STOCKHOLDERS' EQUITY AND EARN80

STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details) - shares	Mar. 31, 2016	Jan. 17, 2014	Jan. 16, 2014
Class of Stock
Number of securities into which the warrant may be converted		230,282
Number of warrants exercised	0
MetroCorp | MetroCorp
Class of Stock
Number of securities into which the warrant may be converted			771,429

STOCKHOLDERS' EQUITY AND EARN81

STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic
Net income	$ 107,516	$ 100,027
Less: Earnings allocated to participating securities	0	3
Net income allocated to common stockholders	$ 107,516	$ 100,024
Basic weighted-average common shares outstanding (in shares)	143,958	143,655
Basic EPS (in dollars per share)	$ 0.75	$ 0.70
Diluted
Net income allocated to diluted common stockholders	$ 107,516	$ 100,024
Basic weighted-average common shares outstanding (in shares)	143,958	143,655
Diluted potential common shares (in shares)	845	694
Diluted weighted-average common shares outstanding (in shares)	144,803	144,349
Diluted EPS (in dollars per share)	$ 0.74	$ 0.69

STOCKHOLDERS' EQUITY AND EARN82

STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 3) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE
Weighted average anti-dilutive shares (in shares)	13	170

ACCUMULATED OTHER COMPREHENSI83

ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ (14,941)	$ 4,237
Net unrealized gains (losses) arising during the period	15,109	11,872
Amounts reclassified from AOCI	(2,226)	(2,554)
Changes, net of taxes	12,883	9,318
Ending balance	(2,058)	13,555
Available- for-Sale Investment Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(6,144)	4,237
Net unrealized gains (losses) arising during the period	15,142	11,872
Amounts reclassified from AOCI	(2,226)	(2,554)
Changes, net of taxes	12,916	9,318
Ending balance	6,772	$ 13,555
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(8,797)
Net unrealized gains (losses) arising during the period	(33)
Amounts reclassified from AOCI	0
Changes, net of taxes	(33)
Ending balance	$ (8,830)

ACCUMULATED OTHER COMPREHENSI84

ACCUMULATED OTHER COMPREHENSIVE INCOME (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Available-for-sale investment securities:
Net unrealized gains arising during the period	$ 26,130	$ 20,470
Net realized gains reclassified into net income	(3,842)	(4,404)
Net change	22,288	16,066
Foreign currency translation adjustments:
Net unrealized losses arising during period	(33)	0
Net change	(33)	0
Other comprehensive income	22,255	16,066
Available-for-sale investment securities:
Net unrealized gains arising during the period	(10,988)	(8,598)
Net realized gains reclassified into net income	1,616	1,850
Net change	(9,372)	(6,748)
Foreign currency translation adjustments:
Net unrealized losses arising during period	0	0
Net change	0	0
Other comprehensive income	(9,372)	(6,748)
Available-for-sale investment securities:
Net unrealized gains arising during the period	15,142	11,872
Net realized gains reclassified into net income	(2,226)	(2,554)
Net change	12,916	9,318
Foreign currency translation adjustments:
Net unrealized losses arising during period	(33)	0
Net change	(33)	0
Other comprehensive income	$ 12,883	$ 9,318

BUSINESS SEGMENTS (Details)

BUSINESS SEGMENTS (Details)	3 Months Ended
	Mar. 31, 2016segmentbusiness_division
Segment Reporting [Abstract]
Number of operating segments	3
Number of business divisions | business_division	3
Number of segment whom broad administrative support are provided	2

BUSINESS SEGMENTS (Details 2)

BUSINESS SEGMENTS (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Segment Reporting Information
Interest income	$ 276,172	$ 263,261
Charge for funds used	(88,280)	(70,094)
Interest spread on funds used	187,892	193,167
Interest expense	(23,968)	(27,544)
Credit on funds provided	88,280	70,094
Interest spread on funds provided	64,312	42,550
Net interest income before provision for credit losses	252,204	235,717
(Reversal of) provision for credit losses	1,440	4,987
Depreciation, amortization and (accretion), net	12,758	4,127
Segment pretax profit	144,671	146,826
Segment assets	33,109,169	29,906,835	$ 32,350,922
Operating Segments | Retail Banking
Segment Reporting Information
Interest income	77,371	87,446
Charge for funds used	(22,652)	(23,298)
Interest spread on funds used	54,719	64,148
Interest expense	(14,606)	(12,224)
Credit on funds provided	72,431	57,668
Interest spread on funds provided	57,825	45,444
Net interest income before provision for credit losses	112,544	109,592
(Reversal of) provision for credit losses	(1,582)	731
Depreciation, amortization and (accretion), net	43	1,682
Segment pretax profit	45,945	52,935
Segment assets	7,203,470	7,540,501
Operating Segments | Commercial Banking
Segment Reporting Information
Interest income	177,082	158,786
Charge for funds used	(53,791)	(37,351)
Interest spread on funds used	123,291	121,435
Interest expense	(4,026)	(4,263)
Credit on funds provided	9,977	8,016
Interest spread on funds provided	5,951	3,753
Net interest income before provision for credit losses	129,242	125,188
(Reversal of) provision for credit losses	3,022	4,256
Depreciation, amortization and (accretion), net	(10,773)	(10,477)
Segment pretax profit	92,829	93,175
Segment assets	17,939,537	15,491,368
Operating Segments | Other
Segment Reporting Information
Interest income	21,719	17,029
Charge for funds used	(11,837)	(9,445)
Interest spread on funds used	9,882	7,584
Interest expense	(5,336)	(11,057)
Credit on funds provided	5,872	4,410
Interest spread on funds provided	536	(6,647)
Net interest income before provision for credit losses	10,418	937
(Reversal of) provision for credit losses	0	0
Depreciation, amortization and (accretion), net	23,488	12,922
Segment pretax profit	5,897	716
Segment assets	$ 7,966,162	$ 6,874,966

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - $ / shares	Apr. 20, 2016	Mar. 31, 2016	Mar. 31, 2015
Subsequent events
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)		$ 0.2	$ 0.2
Subsequent Event
Subsequent events
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.20