East West Bancorp (EWBC) 10-K 28 Feb 22 2021 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Jan. 31, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	000-24939
Entity Registrant Name	EAST WEST BANCORP, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-4703316
Entity Address, Address Line One	135 North Los Robles Ave.
Entity Address, Address Line Two	7th Floor
Entity Address, City or Town	Pasadena
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91101
City Area Code	626
Local Phone Number	768-6000
Title of 12(b) Security	Common stock, par value $0.001 per share
Trading Symbol	EWBC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 10,090,038,515
Entity Common Stock, Shares Outstanding		141,908,514
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A relating to its 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.
Entity Central Index Key	0001069157
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Auditor Information [Abstract]
Auditor Name	KPMG LLP
Auditor Location	Los Angeles, CA
Auditor Firm ID	185

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 527,317	$ 592,117
Interest-bearing cash with banks	3,385,618	3,425,854
Cash and cash equivalents	3,912,935	4,017,971
Interest-bearing deposits with banks	736,492	809,728
Assets purchased under resale agreements (“resale agreements”)	2,353,503	1,460,000
Securities:
Available-for-sale (“AFS”) debt securities, at fair value (amortized cost of $10,087,179 in 2021 and $5,470,523 in 2020; includes assets pledged as collateral of $803,896 in 2021 and $588,484 in 2020)	9,965,353	5,544,658
Restricted equity securities, at cost	77,434	83,046
Loans held-for-sale	635	1,788
Loans held-for-investment (net of allowance for loan losses of $541,579 in 2021 and $619,983 in 2020; includes assets pledged as collateral of $27,672,561 in 2021 and $23,263,517 in 2020)	41,152,202	37,770,972
Investments in qualified affordable housing partnerships, net	289,741	213,555
Investments in tax credit and other investments, net	338,522	266,525
Premises and equipment (net of accumulated depreciation of $139,358 in 2021 and $127,884 in 2020)	97,302	103,251
Goodwill	465,697	465,697
Operating lease right-of-use assets	98,632	95,460
Other assets	1,382,253	1,324,262
TOTAL	60,870,701	52,156,913
LIABILITIES
Noninterest-bearing	22,845,464	16,298,301
Interest-bearing	30,505,068	28,564,451
Total deposits	53,350,532	44,862,752
Short-term borrowings	0	21,009
Federal Home Loan Bank (“FHLB”) advances	249,331	652,612
Assets sold under repurchase agreements (“repurchase agreements”)	300,000	300,000
Long-term debt and finance lease liabilities	151,997	151,739
Operating lease liabilities	105,534	102,830
Accrued expenses and other liabilities	876,089	796,796
Total liabilities	55,033,483	46,887,738
COMMITMENTS AND CONTINGENCIES (Note 12)
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 167,790,645 and 167,240,600 shares issued in 2021 and 2020, respectively	168	167
Additional paid-in capital	1,893,557	1,858,352
Retained earnings	4,683,659	4,000,414
Treasury stock, at cost 25,882,691 shares in 2021 and 25,675,371 shares in 2020	(649,785)	(634,083)
Accumulated other comprehensive (loss) income (“AOCI”), net of tax	(90,381)	44,325
Total stockholders’ equity	5,837,218	5,269,175
TOTAL	$ 60,870,701	$ 52,156,913

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Available-for-sale (AFS) debt securities, at amortized cost	$ 10,087,179	$ 5,470,523
Available-for-sale debt securities pledged as collateral at fair value	803,896	588,484
Allowance for loan losses	541,579	619,983
Loans held-for-investment pledged as collateral	27,672,561	23,263,517
Premises and equipment, accumulated depreciation	$ 139,358	$ 127,884
STOCKHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	167,790,645	167,240,600
Treasury stock, shares (in shares)	25,882,691	25,675,371

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees	$ 1,424,900,000	$ 1,464,382,000	$ 1,717,415,000
AFS debt securities	143,983,000	82,553,000	67,838,000
Resale agreements	32,239,000	21,389,000	28,061,000
Restricted equity securities	2,081,000	1,543,000	2,468,000
Interest-bearing cash and deposits with banks	15,531,000	25,175,000	66,518,000
Total interest and dividend income	1,618,734,000	1,595,042,000	1,882,300,000
INTEREST EXPENSE
Deposits	69,159,000	184,742,000	375,802,000
Short-term borrowings	42,000	1,504,000	1,763,000
FHLB advances	6,881,000	13,792,000	16,697,000
Repurchase agreements	7,999,000	11,766,000	13,582,000
Long-term debt and finance lease liabilities	3,082,000	6,045,000	6,643,000
Total interest expense	87,163,000	217,849,000	414,487,000
Net interest income before (reversal of) provision for credit losses	1,531,571,000	1,377,193,000	1,467,813,000
(Reversal of) provision for credit losses	(35,000,000)	210,653,000	98,685,000
Net interest income after (reversal of) provision for credit losses	1,566,571,000	1,166,540,000	1,369,128,000
NONINTEREST INCOME
Lending fees	77,704,000	74,842,000	63,670,000
Deposit account fees	71,261,000	48,148,000	38,648,000
Interest rate contracts and other derivative income	22,913,000	31,685,000	39,865,000
Foreign exchange income	48,977,000	22,370,000	26,398,000
Wealth management fees	25,751,000	17,494,000	16,547,000
Net gains on sales of loans	8,909,000	4,501,000	4,035,000
Net gains on sales of AFS debt securities	1,568,000	12,299,000	3,930,000
Other investment income	16,852,000	10,641,000	18,117,000
Other income	11,960,000	13,567,000	11,035,000
Total noninterest income	285,895,000	235,547,000	222,245,000
NONINTEREST EXPENSE
Compensation and employee benefits	433,728,000	404,071,000	401,700,000
Occupancy and equipment expense	62,996,000	66,489,000	69,730,000
Deposit insurance premiums and regulatory assessments	17,563,000	15,128,000	12,928,000
Deposit account expense	16,152,000	13,530,000	14,175,000
Data processing	16,263,000	16,603,000	13,533,000
Computer software expense	30,600,000	29,033,000	26,471,000
Consulting expense	6,517,000	5,391,000	9,846,000
Legal expense	8,015,000	7,766,000	8,441,000
Other operating expense	81,798,000	79,489,000	92,249,000
Amortization of tax credit and other investments	122,457,000	70,082,000	98,383,000
Repurchase agreements’ extinguishment cost	0	8,740,000	0
Total noninterest expense	796,089,000	716,322,000	747,456,000
INCOME BEFORE INCOME TAXES	1,056,377,000	685,765,000	843,917,000
INCOME TAX EXPENSE	183,396,000	117,968,000	169,882,000
NET INCOME	$ 872,981,000	$ 567,797,000	$ 674,035,000
EARNINGS PER SHARE (“EPS”)
BASIC (in dollars per share)	$ 6.16	$ 3.99	$ 4.63
DILUTED (in dollars per share)	$ 6.10	$ 3.97	$ 4.61
WEIGHTED-AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC (in shares)	141,826	142,336	145,497
DILUTED (in shares)	143,140	142,991	146,179

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 872,981	$ 567,797	$ 674,035
Other comprehensive income, net of tax:
Net changes in unrealized (losses) gains on AFS debt securities	(137,950)	54,666	43,402
Net changes in unrealized gains (losses) on cash flow hedges	1,487	(1,230)	0
Foreign currency translation adjustments	1,757	9,297	(3,636)
Other comprehensive (loss) income	(134,706)	62,733	39,766
COMPREHENSIVE INCOME	$ 738,275	$ 630,530	$ 713,801

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands		Total	Stock Compensation Plans and Agreements	Stock Repurchase Program	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common StockStock Compensation Plans and Agreements	Common StockStock Repurchase Program	Common Stock and Additional Paid-In Capital	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Treasury StockStock Compensation Plans and Agreements	Treasury StockStock Repurchase Program	AOCI, net of Tax
Balance (in shares) at Dec. 31, 2018						144,961,363
Beginning balance at Dec. 31, 2018		$ 4,423,974							$ 1,789,977	$ 3,160,132		$ (467,961)			$ (58,174)
Beginning balance (Accounting Standards Update 2016-02) at Dec. 31, 2018	[1]				$ 10,510						$ 10,510
Increase (Decrease) in Stockholders' Equity
Net income		674,035								674,035
Other comprehensive income (loss)		39,766													39,766
Warrants exercised (in shares)						180,226
Warrants exercised		4,443							1,711			2,732
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)						754,372
Issuance of common stock pursuant to various stock compensation plans and agreements		34,824							34,824
Purchase of treasury stock pursuant to the Stock Repurchase Program (in shares)							(270,576)
Repurchase of common stock pursuant to various stock compensation plans and agreements			$ (14,635)										$ (14,635)
Cash dividends on common stock		(155,300)								(155,300)
Ending balance at Dec. 31, 2019		5,017,617							1,826,512	3,689,377		(479,864)			(18,408)
Ending balance (Accounting Standards Update 2016-13) at Dec. 31, 2019	[2]				$ (97,967)						$ (97,967)
Balance (in shares) at Dec. 31, 2019						145,625,385
Increase (Decrease) in Stockholders' Equity
Net income		567,797								567,797
Other comprehensive income (loss)		62,733													62,733
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)						618,641
Issuance of common stock pursuant to various stock compensation plans and agreements		32,007							32,007
Purchase of treasury stock pursuant to the Stock Repurchase Program (in shares)							(207,115)	(4,471,682)
Repurchase of common stock pursuant to various stock compensation plans and agreements			(8,253)	$ (145,966)									(8,253)	$ (145,966)
Cash dividends on common stock		(158,793)								(158,793)
Ending balance at Dec. 31, 2020		5,269,175							1,858,519	4,000,414		(634,083)			44,325
Balance (in shares) at Dec. 31, 2020						141,565,229
Increase (Decrease) in Stockholders' Equity
Net income		872,981								872,981
Other comprehensive income (loss)		(134,706)													(134,706)
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)						550,045
Issuance of common stock pursuant to various stock compensation plans and agreements		35,206							35,206
Purchase of treasury stock pursuant to the Stock Repurchase Program (in shares)							(207,320)
Repurchase of common stock pursuant to various stock compensation plans and agreements			$ (15,702)										$ (15,702)
Cash dividends on common stock		(189,736)								(189,736)
Ending balance at Dec. 31, 2021		$ 5,837,218							$ 1,893,725	$ 4,683,659		$ (649,785)			$ (90,381)
Balance (in shares) at Dec. 31, 2021						141,907,954
[1]	Represents the impact of the adoption of Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) and subsequent related ASUs on January 1, 2019.
[2]	Represents the impact of the adoption of ASU 2016-13, Financial Instruments — Credit Losses (Topic 326) on January 1, 2020. Refer to Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements in this Annual Report on Form 10-K (“this Form 10-K”) for additional information.

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 1.320	$ 1.100	$ 1.055

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 872,981	$ 567,797	$ 674,035
Adjustments to reconcile net income to net cash provided by operating activities:
(Reversal of) provision for credit losses	(35,000)	210,653	98,685
Depreciation and amortization	156,792	119,908	144,178
Accretion of discount and amortization of premiums, net	33,467	(16,456)	(22,379)
Stock compensation costs	32,567	29,237	30,761
Deferred income tax benefit	4,762	(41,515)	(21,604)
Net gains on sales of loans	(8,909)	(4,501)	(4,035)
Gains on sales of AFS debt securities	(1,568)	(12,299)	(3,930)
Net gains on sales of other real estate owned ("OREO") and other foreclosed assets	(1,977)	(207)	(233)
Impairment on OREO and other foreclosed assets	5,151	3,717	9
Loans held-for-sale:
Originations and purchases	(11,155)	(81,662)	(10,569)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale	12,552	80,659	10,436
Proceeds from distributions received from equity method investees	13,117	8,786	3,470
Net change in accrued interest receivable and other assets	124,496	(340,566)	(172,506)
Net change in accrued expenses and other liabilities	(29,412)	170,420	6,015
Other net operating activities	558	(1,327)	812
Total adjustments	295,441	124,847	59,110
Net cash provided by operating activities	1,168,422	692,644	733,145
Net (increase) decrease in:
Interest-bearing deposits with banks	73,263	(613,400)	170,455
Investments in qualified affordable housing partnerships, tax credit and other investments	(189,836)	(154,887)	(146,902)
Resale agreements:
Proceeds from paydowns and maturities	982,694	450,000	650,000
Purchases	(1,876,197)	(800,000)	(325,000)
AFS debt securities:
Proceeds from sales	308,812	525,433	627,110
Proceeds from repayments, maturities and redemptions	1,766,184	2,070,131	1,155,002
Purchases	(6,779,655)	(4,758,254)	(2,303,317)
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment	606,410	331,864	288,823
Purchases	(1,045,456)	(389,863)	(524,142)
Other changes in loans held-for-investment, net	(2,877,438)	(3,546,596)	(2,183,665)
Premises and equipment:
Proceeds from sales	329	5,154	403
Purchases	(6,017)	(2,656)	(9,859)
Proceeds from sales of OREO and other foreclosed assets	54,338	295	1,224
Purchase of bank-owned life insurance	(150,000)	0	0
Distributions received from equity method investees	14,440	15,901	9,502
Other net investing activities	925	(6,858)	(2,560)
Net cash (used in) provided by investing activities	(9,117,204)	(6,873,736)	(2,592,926)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	8,464,285	7,482,845	1,903,717
Net (decrease) increase in short-term borrowings	(21,143)	(9,016)	(28,535)
FHLB advances:
Proceeds	400	10,300	1,500,000
Repayments	(405,400)	(105,300)	(1,082,001)
Repurchase agreements:
Proceeds	0	48,063	0
Repayment	0	(198,063)	0
Extinguishment cost	0	(8,740)	0
Long-term debt and lease liabilities:
Proceeds from long-term debt	0	1,437,269	0
Repayments of long-term debt and lease liabilities	(1,206)	(1,438,335)	(884)
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements	2,573	2,326	3,383
Stocks tendered for payment of withholding taxes	(15,702)	(8,253)	(14,635)
Repurchase of common stocks pursuant to the Stock Repurchase Program	0	(145,966)	0
Cash dividends paid	(188,762)	(158,222)	(155,107)
Net cash provided by financing activities	7,835,045	6,908,908	2,125,938
Effect of exchange rate changes on cash and cash equivalents	8,701	29,006	(6,385)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(105,036)	756,822	259,772
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4,017,971	3,261,149	3,001,377
CASH AND CASH EQUIVALENTS, END OF YEAR	3,912,935	4,017,971	3,261,149
Cash paid during the year for:
Interest	87,684	233,139	418,840
Income taxes, net	139,460	116,416	158,296
Noncash investing and financing activities:
Loans transferred from held-for-investment to held-for-sale	599,610	329,069	285,637
Loans transferred to OREO	$ 49,485	$ 19,504	$ 2,013

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization East West Bancorp, Inc. (referred to herein on an unconsolidated basis as “East West” and on a consolidated basis as the “Company”) is a registered bank holding company that offers a full range of banking services to individuals and businesses through its subsidiary bank, East West Bank and its subsidiaries (“East West Bank” or the “Bank”). The Bank is the Company’s principal asset. As of December 31, 2021, the Company operates in more than 120 locations in the United States (“U.S.”) and China. In the U.S., the Bank’s corporate headquarters and main administrative offices are located in California, and its branches and offices are located in California, Texas, New York, Massachusetts, Georgia, Washington, Nevada and Illinois. In China, East West’s presence includes full-service branches in Hong Kong, Shanghai, Shantou and Shenzhen, and representative offices in Beijing, Chongqing, Guangzhou and Xiamen. The Bank has a banking subsidiary based in China — East West Bank (China) Limited. In 2019, the Company acquired East West Markets, LLC, a registered broker-dealer, and established East West Investment Management LLC, an investment adviser. Both East West Markets, LLC and East West Investment Management LLC are wholly-owned subsidiaries of East West. Significant Accounting Policies Basis of Presentation — The accounting and reporting policies of the Company conform with the U.S. Generally Accepted Accounting Principles (“GAAP”), applicable guidelines prescribed by regulatory authorities and general practices in the banking industry. The preparation of the Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the Consolidated Financial Statements, income and expenses during the reporting period, and the related disclosures. Actual results could differ materially from those estimates. Certain items on the Consolidated Financial Statements and notes for the prior years have been reclassified to conform to the 2021 presentation. Principles of Consolidation — The Consolidated Financial Statements in this Form 10-K include the accounts of East West and its subsidiaries. Intercompany transactions and accounts have been eliminated in consolidation. East West also has six wholly-owned subsidiaries that are statutory business trusts (the “Trusts”). In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 810, Consolidation, the Trusts are not included on the Consolidated Financial Statements. Cash and Cash Equivalents — Cash and cash equivalents include cash on hand, cash items in transit, cash due from the Federal Reserve Bank of San Francisco (“FRBSF”) and other financial institutions, and federal funds sold with original maturities up to three months. Interest-Bearing Deposits with Banks — Interest-bearing deposits with banks include cash placed with other banks with original maturities greater than three months and less than one year. Assets Purchased under Resale Agreements and Assets Sold under Repurchase Agreements — Resale agreements are recorded as receivables based on the values at which the securities or loans are acquired. Repurchase agreements are accounted for as collateralized financing transactions and recorded as liabilities based on the values at which the securities are sold. The Company monitors the values of the underlying assets collateralizing the resale and repurchase agreements, including accrued interest, and obtains or posts additional collateral in order to maintain the appropriate collateral requirements for the transactions. In addition, the Company has elected to offset resale and repurchase transactions with the same counterparty on the Consolidated Balance Sheet when it has a legally enforceable master netting agreement and when the transactions are eligible for netting under ASC 210-20-45-11, Balance Sheet Offsetting: Repurchase and Reverse Repurchase Agreements . For allowance for credit losses on resale agreements, refer to the Allowance for Collateral-Dependent Financial Assets section of this note for details. Securities — The Company’s securities include various debt securities, marketable equity securities and restricted equity securities. Debt securities are recorded on the Consolidated Balance Sheet as of their trade dates. The Company classifies its debt securities as trading securities, AFS or held-to-maturity debt securities based on management’s intention on the date of the purchase. Debt securities are purchased for liquidity and investment purposes, as part of asset-liability management and other strategic activities. Debt securities for which the Company does not have the positive intention and ability to hold to maturity are classified as AFS. AFS debt securities are reported at fair value with unrealized gains and losses, net of applicable income taxes, and are included in AOCI, net of the allowance for credit losses. Interest income, including amortization of any premium or discount, is included in net income. We recognize realized gains and losses on the sale of AFS debt securities in earnings, using the specific identification method. For allowance for credit losses on AFS debt securities, refer to the Allowance for Credit Losses on Available-for-Sale Debt Securities section of this note for details. Marketable equity securities that have readily determinable fair values are recorded at fair value with unrealized gains and losses, due to changes in fair value, reflected in earnings. Marketable equity securities include mutual fund investments, which are included in Investments in tax credit and other investments, net on the Consolidated Balance Sheet. Non-marketable equity securities that do not have readily determinable fair values are accounted for under one of the following accounting methods: • Equity Method — When we have the ability to exert significant influence over the investee. • Cost Method — The cost method is applied to investments such as FRBSF and FHLB stock. These investments are held at their cost minus impairment. If impaired, the carrying value is written down to the fair value of the security. • Measurement Alternative — This method is applied to all remaining non-marketable equity securities. These securities are carried at cost adjusted for impairment, if any, plus or minus observable price changes in orderly transactions of an identical or similar security of the same issuer. Non-marketable equity securities include tax credit investments that are included in Investments in tax credit and other investments, net, and Other assets on the Consolidated Balance Sheet. Our impairment review for equity method, cost method and measurement alternative securities typically includes an analysis of the facts and circumstances of each security, the intent or requirement to sell the security, the expectations of cash flows, capital needs and the viability of its business model. For equity method and cost method investments, we reduce the asset’s carrying value when we consider declines in value to be other-than-temporary impairment (“OTTI”). For securities accounted for under the measurement alternative, we reduce the asset value when the fair value is less than the carrying value, without the consideration of recovery. Restricted equity securities include FRBSF and FHLB stock. The FRBSF stock is required by law to be held as a condition of membership in the Federal Reserve System. The FHLB stock is required to obtain advances from the FHLB. They are carried at cost as they do not have a readily determinable fair value. Loans Held-for-Sale — Loans are initially classified as loans held-for-sale when they are individually identified as being available for immediate sale and management has committed to a formal plan to sell them. Loans held-for-sale are carried at lower of cost or fair value. Subject to periodic review under the Company’s evaluation process, including asset/liability and credit risk management, the Company may transfer certain loans from held-for-investment to held-for-sale measured at lower of cost or fair value. Any write-downs in the carrying amount of the loan at the date of transfer are recorded as charge-offs to allowance for loan losses. Loan origination fees on loans held-for-sale, net of certain costs in processing and closing the loans, are deferred until the time of sale and are included in the periodic determination of the lower of cost or fair value adjustments and/or the gain or loss recognized at the time of sale. A valuation allowance is established if the fair value of such loans is lower than their cost, with a corresponding charge to noninterest income. If the loan or a portion of the loan cannot be sold, it is subsequently transferred back to the loans held-for-investment portfolio from the loans held-for-sale portfolio at the lower of cost or fair value on the transfer date. Loans Held-for-Investment — At the time of commitment to originate or purchase a loan, the loan is determined to be held-for-investment if it is the Company’s intent to hold the loan to maturity or for the “foreseeable future”. Loans held-for-investment are stated at their outstanding principal, reduced by an allowance for loan losses and net of deferred loan fees or costs, or unearned fees on originated loans, net of unamortized premiums or unaccreted discounts on purchased loans. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs are recognized in interest income as an adjustment to yield over the loan term using the effective interest method or straight-line method. Discounts/premiums on purchased loans are accreted/amortized to interest income using the effective interest method or straight-line method over the remaining period to the contractual maturity. Interest on loans is calculated using the simple-interest method on daily balances of the principal amounts outstanding. Generally, loans are placed on nonaccrual status when they become 90 days past due or more. Loans are considered past due when contractually required principal or interest payments have not been made on the due dates. Loans are also placed on nonaccrual status when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of principal or interest becomes uncertain, regardless of the length of past due status. Once a loan is placed on nonaccrual status, interest accrual is discontinued and all unpaid accrued interest is reversed against interest income. Interest payments received on nonaccrual loans are reflected as a reduction of principal and not as interest income. A loan is returned to accrual status when the borrower has demonstrated a satisfactory payment trend subject to management’s assessment of the borrower’s ability to repay the loan. Troubled Debt Restructurings — A loan is generally classified as a troubled debt restructuring (“TDR”) when the Company, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The concessions may be granted in various forms, including a below-market change in the stated interest rate, a reduction in the loan balance or accrued interest, an extension of the maturity date with a stated interest rate lower than the current market rate or note splits referred to as A/B note restructurings. Loans with contractual terms that have been modified as a TDR and are current at the time of restructuring may remain on accrual status if there is demonstrated performance prior to the restructuring and payment in full under the restructured terms is expected. Otherwise, these loans are placed on nonaccrual status and are reported as nonperforming, until the borrower demonstrates a sustained period of performance, generally six months, and the ability to repay the loan according to the contractual terms. If accruing TDRs cease to perform in accordance with their modified contractual terms, they are placed on nonaccrual status and reported as nonperforming TDRs. TDRs are included in the quarterly allowance for credit losses valuation process. Refer to Allowance for Loan Losses below for a complete discussion. The Company has implemented various loan modification programs to provide its borrowers relief from the economic impacts of the COVID-19 pandemic. As provided under Section 4013 of the CARES Act, as amended by the Consolidated Appropriations Act, 2021 (“CAA”), the Company has elected not to apply TDR classification to any COVID-19 pandemic- related loan modifications that were executed after March 1, 2020 and earlier of (A) 60 days after the national emergency termination date concerning the COVID-19 pandemic outbreak or (B) January 1, 2022 to borrowers who were current as of December 31, 2019. For loans that were modified in response to the COVID-19 pandemic that do not meet the CARES Act criteria (e.g., current payment status as of December 31, 2019), the Company has applied the guidance included in the “ Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customer Affected by the Coronavirus (Revised) ” (the “Interagency Statement”) issued by the federal banking regulators on April 7, 2020. The Interagency Statement states that short-term loan modifications (i.e. six months or less) are not TDRs if they were made on a good faith basis in response to the COVID-19 pandemic to borrowers who were current as of the implementation date of a loan modification program. The aging on the delinquency of the loans modified under the CARES Act, as amended by the CAA, and the Interagency Statement is frozen at the time of the modification. Interest income continues to be recognized over the accommodation period. Paycheck Protection Program — In 2020 and 2021, the Company accepted Paycheck Protection Program (“PPP”) applications and originated loans to qualified small businesses under the PPP established by the CARES Act. The SBA stopped accepting new loan applications on May 31, 2021. PPP loans are included in the C&I loan portfolio, carrying an interest rate of 1%, and are 100% guaranteed by the Small Business Administration (“SBA”). No allowance for loan losses was recorded for these loans as of December 31, 2021 and 2020. As of December 31, 2021, the Company had approximately 1,800 SBA 7(a) approved PPP loans with an outstanding loan balance of $534.2 million. The majority of the Company’s remaining PPP loans have a term of five years. The SBA paid the Company fees for processing PPP loans and such fees are accounted for as loan origination fees, where net deferred fees are recognized over the estimated life of the loan as a yield adjustment on the loans. Under the terms of the PPP, if certain conditions are satisfied, such loans are eligible to be forgiven in which case the SBA will make payments to the Company for the forgiven amounts. If a loan is paid off or forgiven by the SBA prior to its projected estimated life, the remaining unamortized deferred fees will be recognized as interest income in that period. Allowance for Loan Losses — The Company adopted ASU 2016-13, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments on January 1, 2020, which introduced a new current expected credit losses (“CECL”) model. The allowance for loan losses is established as management’s estimate of expected credit losses inherent in the Company’s lending activities; it is increased by the provision for credit losses and decreased by net charge-offs. The allowance for loan losses is evaluated quarterly by management based on regular reviews of the collectability of the Company’s loans, and more often if deemed necessary. The Company develops and documents the allowance for loan losses methodology at the portfolio segment level. The commercial loan portfolio is comprised of C&I, CRE, multifamily residential, and construction and land loans; and the consumer loan portfolio is comprised of single-family residential, HELOCs, and other consumer loans. The allowance for loan losses represents the portion of a loan’s amortized cost basis that the Company does not expect to collect due to anticipated credit losses over the loan’s contractual life, adjusted for prepayments. The Company measures the expected loan losses on a collective pool basis when similar risk characteristics exist. Models consisting of quantitative and qualitative components are designed for each pool to develop the expected credit loss estimates. Reasonable and supportable forecast periods vary by loan portfolio. The Company has adopted lifetime loss rate models for the portfolios, which use historical loss rates and forecast economic variables to calculate the expected credit losses for each loan pool. When loans do not share similar risk characteristics, the Company evaluates the loan for expected credit losses on an individual basis. Individually assessed loans include nonaccrual and TDR loans. The Company evaluates loans for expected credit losses on an individual basis if, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the original contractual terms of the loan agreement. The following three different asset valuation measurement methods are available: (1) the present value of expected future cash flows, (2) the fair value of collateral less costs to sell, and (3) the loan's observable market price. The allowance for loan losses for collateral-dependent loans is determined based on the fair value of the collateral less costs to sell. For loans that are not collateral-dependent, the Company applies the present value of expected future cash flows valuation or the market value of the loan. When the loan is deemed uncollectible, it is the Company’s policy to charge off the uncollectible amount against the allowance for credit losses. The amortized cost of loans held-for-investment excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election to not recognize an allowance for credit losses for accrued interest receivables as the Company reverses accrued interest if a loan is on nonaccrual status. The allowance for loan losses is reported separately on the Consolidated Balance Sheet and the Provision for credit losses is reported on the Consolidated Statement of Income. Allowance for Unfunded Credit Commitments — The allowance for unfunded credit commitments includes reserves provided for unfunded loan commitments, letters of credit, standby letters of credit (“SBLCs”) and recourse obligations for loans sold. The Company estimates the allowance for unfunded credit commitments over the contractual period in which the entity is exposed to credit risk via a present contractual obligation to extend credit. Within the period of credit exposure, the estimate of credit losses will consider both the likelihood that funding will occur, and an estimate of the expected credit losses on the commitments that are expected to fund over their estimated lives. The allowance for unfunded credit commitments is maintained at a level believed by management to be sufficient to absorb estimated expected credit losses related to unfunded credit facilities. The determination of the adequacy of the allowance is based on periodic evaluations of the unfunded credit facilities. For all off-balance sheet instruments and commitments, the unfunded credit exposure is calculated using assumptions based on the Company's historical utilization experience in related portfolio segments. Loss rates are applied to the calculated exposure balances to estimate the allowance for unfunded credit commitments. Other elements such as credit risk factors for loans outstanding, terms and expiration dates of the unfunded credit facilities, and other pertinent information are considered to determine the adequacy of the allowance. The allowance for unfunded credit commitments is included in the Accrued expenses and other liabilities on the Consolidated Balance Sheet. Changes to the allowance for unfunded credit commitments are included in Provision for credit losses on the Consolidated Income Statements. Allowance for Credit Losses on Available-for-Sale Debt Securities — For each reporting period, every AFS debt security that is in an unrealized loss position is individually analyzed as part of the Company’s ongoing assessments to determine whether a fair value below the amortized cost basis has resulted from a credit loss or other factors. The initial indicator of impairment is a decline in fair value below the amortized cost of the AFS debt security, excluding accrued interest. The Company first considers whether there is a plan to sell the AFS debt security or it is more-likely-than-not that it will be required to sell the debt security before recovery of the amortized cost. In determining whether an impairment is due to credit related factors, the Company considers the severity of the decline in fair value, nature of the security, the underlying collateral, the financial condition of the issuer, changes in the AFS debt security’s ratings and other qualitative factors. For AFS debt securities that are guaranteed or issued by the U.S. government, or government-sponsored enterprises of high credit quality, the Company applies a zero credit loss assumption. When the Company does not intend to sell the impaired AFS debt security and it is more-likely-than-not that the Company will not be required to sell the impaired debt security prior to recovery of its amortized cost basis, the credit component of the unrealized loss of the impaired AFS debt security is recognized as an allowance for credit losses, with a corresponding Provision for credit losses on the Consolidated Statement of Income and the non-credit component is recognized in Other comprehensive income (loss) on the Consolidated Statement of Comprehensive Income, net of applicable taxes. At each reporting period, the Company increases or decreases the allowance for credit losses as appropriate, while limiting reversals of the allowance for credit losses to the extent of the amounts previously recorded. If the Company intends to sell the impaired debt security or it is more-likely-than-not that the Company will be required to sell the impaired debt security prior to recovering its amortized cost basis, the entire impairment amount is recognized as an adjustment to the debt security’s amortized cost basis, with a corresponding Provision for credit losses on the Consolidated Statement of Income. The amortized cost of the Company’s AFS debt securities excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election to not recognize an allowance for credit losses for accrued interest receivables on AFS debt securities as the Company reverses any accrued interest if a debt security is impaired. As each AFS debt security has a unique security structure, where the accrual status is clearly determined when certain criteria listed in the terms are met, the Company assesses the default status of each security as defined by the debt security’s specific security structure. Other-Than-Temporary Impairment Assessment on AFS Debt Securities Prior to the Adoption of the CECL Guidance, Applicable for the Year Ended December 31, 2019 — For each reporting period, debt securities classified as either AFS or held-to-maturity debt securities that were in an unrealized loss position were analyzed as part of the Company’s ongoing OTTI assessment. The initial indicator of OTTI was a decline in fair value below the amortized cost of the debt security. In determining whether OTTI had occurred, the Company considered the severity and duration of the decline in fair value, the length of time expected for recovery, the financial condition of the issuer, changes in the debt securities’ ratings and other qualitative factors, as well as whether the Company either planned to sell the debt security or it was more-likely-than-not that it would be required to sell the debt security before recovery of the amortized cost. When the Company did not intend to sell the impaired debt security and it was more-likely-than-not that the Company would not be required to sell the impaired debt security prior to recovery of its amortized cost basis, the credit component of an OTTI of the impaired debt security was recognized as OTTI loss on the Consolidated Statement of Income and the non-credit component was recognized in other comprehensive income. This applied for both AFS and held-to-maturity debt securities. If the Company intended to sell the impaired debt security or it was more-likely-than-not that the Company would be required to sell the impaired debt security prior to recovery of its amortized cost basis, the full amount of the impairment loss (equal to the difference between the debt security’s amortized cost basis and its fair value at the balance sheet date) was recognized as OTTI loss on the Consolidated Statement of Income. Following the recognition of OTTI, the debt security’s new amortized cost basis was the previous basis minus the OTTI amount recognized in earnings. Allowance for Collateral-Dependent Financial Assets — A financial asset is considered collateral-dependent if repayment is expected to be provided substantially through the operation or sale of the collateral. The allowance for credit losses is measured on an individual basis for collateral-dependent financial assets and determined by comparing the fair value of the collateral, minus the cost to sell, to the amortized cost basis of the related financial asset at the reporting date. Other than loans, collateral-dependent financial assets could also include resale agreements. In arrangements which the borrower must continually adjust the collateral securing the asset to reflect changes in the collateral’s fair value (e.g., resale agreements), the Company estimates the expected credit losses on the basis of the unsecured portion of the amortized cost as of the balance sheet date. If the fair value of the collateral is equal to or greater than the amortized cost of the resale agreement, the expected losses would be zero. If the fair value of the collateral is less than the amortized cost of the asset, the expected losses are limited to the difference between the fair value of the collateral and the amortized cost basis of the resale agreement. Allowance for Purchased Credit Deteriorated Assets — ASU 2016-13 replaces the concept of purchased credit impaired (“PCI”) accounting under ASC 310-30 Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality with the concept of purchased financial assets with credit deterioration. The Company adopted ASU 2016-13 using the prospective transition approach for Purchased Credit Deteriorated (“PCD”) assets that were previously classified as PCI assets. PCD financial assets are defined as acquired individual financial assets (or groups with similar risk characteristics) that as of the date of acquisition, have experienced a more-than-insignificant deterioration in credit quality since origination. For PCD debt securities and PCD loans, the company records the allowance for credit losses by grossing up the initial amortized cost, which includes the purchase price and the allowance for credit losses. The expected credit losses of PCD debt securities are measured at the individual security level. The expected credit losses for PCD loans are measured based on the loan’s unpaid principal balance. Beginning January 1, 2020, for any asset designated as a PCD asset at the time of acquisition, the Company estimates and records an allowance for credit losses, which is added to the purchase price to establish the initial amortized cost basis of the financial asset. Hence, there is no income statement impact from the acquisition. Subsequent changes in the allowance for credit losses on PCD assets will be recognized in Provision for credit losses on the Consolidated Statement of Income. The non-credit discount or premium will be accreted to interest income based on the effective interest rate on the PCD assets determined after the gross-up for the allowance for credit losses. Allowance for Credit Losses Prior to the Adoption of the CECL Guidance, Applicable for the Year Ended December 31, 2019 — Prior to CECL adoption, the allowance of credit losses represented the Company’s estimate of probable credit losses inherent in the lending activities, and consisted of general and specific reserves. Impaired loans were subject to specific reserves. Non-impaired loans were evaluated as part of the general reserve. General reserves were calculated by utilizing both quantitative and qualitative factors. There were different qualitative risks for the loans in each portfolio segment. Predominant risk characteristics of the CRE, multifamily, single-family residential, and HELOC loans considered the collateral and geographic locations of the properties collateralizing the loans. Predominant risk characteristics of the C&I loans included cash flows, debt service and collateral of the borrowers and guarantors, as well as the economic and market conditions. Impaired Loans Prior to the Adoption of the CECL Guidance, Applicable for the Years Ended December 31, 2019 — Impaired loans were identified and evaluated for impairment on an individual basis. A loan was considered impaired when, based on current information and events, it was probable that the Company would not be able to collect all scheduled payments of principal or interest due in accordance with the original contractual terms of the loan agreement. Factors considered by management in determining and measuring loan impairment included payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Impaired loans were measured based on the present value of expected future cash flows discounted at a designated discount rate or, as appropriate, at the loan’s observable market price or the fair value of the collateral, if the loan was collateral dependent, less cost to sell. Purchased Credit-Impaired Loans Prior to the Adoption of the CECL Guidance, Applicable for the Year Ended December 31, 2019 — Acquired loans were recorded at fair value as of acquisition date in accordance with ASC 805, Business Combinations . A purchased loan was deemed to be credit impaired when there was evidence of credit deterioration since its origination and it was probable at the acquisition date that the Company would be unable to collect all contractually required payments and was accounted for under ASC 310-30, Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality . Under ASC 310-30, loans were recorded at fair value at acquisition date, factoring in credit losses expected to be incurred over the life of the loan. Accordingly, an allowance for loan losses was not carried over or recorded as of the acquisition date. Variable Interest and Voting Interest Entities — The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity (“VIE”). We first determine whether or not we have variable interests in the entity, which are investments or other interests that absorb portions of an entity’s expected losses or receive portions of the entity’s expected returns. If it is determined that we do not have a variable interest in the entity, no further analysis is required and the entity is not consolidated. A VIE is an entity that lacks equity investors or whose equity investors do not have a controlling financial interest in the entity through their equity investments. The Company consolidates a VIE if it has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. For entities that do not meet the definition of a VIE, the entity is considered a voting inte

Fair Value Measurement and Fair

Fair Value Measurement and Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurement and Fair Value of Financial Instruments	Fair Value Measurement and Fair Value of Financial Instruments Fair Value Determination Fair value is defined as the price that would be received to sell an asset or the price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. In determining the fair value of financial instruments, 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 an asset or a 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 described 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 prices derived from 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 traded in active markets; quoted prices for identical or similar instruments traded 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. The classification of assets and liabilities within the hierarchy is based on whether inputs to the valuation methodology used are observable or unobservable, and the significance of those inputs in the fair value measurement. 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. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following section describes the valuation methodologies used by the Company to measure financial assets and liabilities on a recurring basis, as well as the general classification of these instruments within the fair value hierarchy. Available-for-Sale Debt Securities — The fair value of AFS debt securities is generally determined by independent external pricing service providers who have experience in valuing these securities or by taking the average quoted market prices obtained from independent external brokers. The valuations provided by the third-party pricing service providers are based on observable market inputs, which include benchmark yields, reported trades, issuer spreads, benchmark securities, bids, offers, prepayment expectation and reference data obtained from market research publications. Inputs used by the third-party pricing service providers in valuing collateralized mortgage obligations and other securitization structures also include new issue data, monthly payment information, whole loan collateral performance, tranche evaluation and “To Be Announced” prices. In valuing securities issued by state and political subdivisions, inputs used by third-party pricing service providers also include material event notices. On a monthly basis, the Company validates the valuations provided by third-party pricing service providers to ensure that the fair value determination is consistent with the applicable accounting guidance and the financial instruments are properly classified in the fair value hierarchy. To perform this validation, the Company compares fair values provided by the third-party pricing service providers to prices from other available independent sources for the same securities. When significant variances in prices are identified, the Company further compares inputs used by different sources to ascertain the reliability of these sources. On a quarterly basis, the Company reviews the documentation received from the third-party pricing service providers regarding the valuation inputs and methodology used for each category of securities. When available, the Company uses quoted market prices to determine the fair value of AFS debt securities that are classified as Level 1. Level 1 AFS debt securities consist of U.S. Treasury securities. When pricing is unavailable from third-party pricing service providers for certain securities, the Company requests market quotes from various independent external brokers and utilizes the average quoted market prices. In addition, the Company obtains market quotes from other official published sources. As these valuations are based on observable inputs in the current marketplace, they are classified as Level 2. The Company periodically communicates with the independent external brokers to validate their pricing methodology. Information such as pricing sources, pricing assumptions, data inputs, and valuation techniques are reviewed periodically. Equity Securities — Equity securities consisted of mutual funds as of both December 31, 2021 and 2020. The Company invested in these mutual funds for Community Reinvestment Act (“CRA”) purposes. The Company uses net asset value (“NAV”) information to determine the fair value of these equity securities. When NAV is available periodically and the equity securities can be put back to the transfer agents at the publicly available NAV, the fair value of the equity securities is classified as Level 1. When NAV is available periodically but the equity securities may not be readily marketable at its periodic NAV in the secondary market, the fair value of these equity securities is classified as Level 2. Interest Rate Contracts — The Company enters into interest rate swap and option contracts that are not designated as hedging instruments with its borrowers to lock in attractive intermediate and long-term interest rates, resulting in the customer obtaining a synthetic fixed-rate loan. To economically hedge against the interest rate risks in the products offered to its customers, the Company enters into mirrored offsetting interest rate contracts with third-party financial institutions. The Company also enters into interest rate swap contracts with institutional counterparties to hedge against certain variable interest rate borrowings. These interest rate swap contracts with institutional counterparties were designated as cash flow hedges. The fair value of the 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 fair value of the interest rate options, which consist of floors and caps, is determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates fall below (rise above) the strike rate of the floors (caps). In addition, to comply with the provisions of ASC 820, Fair Value Measurement , 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 model-derived credit spreads, which are Level 3 inputs. Considering the observable nature of all other significant inputs utilized, the Company classifies these derivative instruments as Level 2. Foreign Exchange Contracts — The Company enters into foreign exchange contracts to accommodate the business needs of its customers. For a majority of the foreign exchange contracts with its customers, the Company entered into offsetting foreign exchange contracts with third-party financial institutions to manage its exposure. The Company also utilizes foreign exchange contracts that are not designated as hedging instruments to mitigate the economic effect of fluctuations in certain foreign currency on-balance sheet assets and liabilities, primarily foreign currency denominated deposits offered to its customers. The fair value of foreign exchange contracts is determined at each reporting period based on changes in the foreign exchange rates. 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. Due to the short-term nature of the majority of these contracts, the counterparties’ credit risks are considered nominal and result 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 exchange contracts are classified as Level 2. As of December 31, 2021 and 2020, the Bank held foreign currency non-deliverable forward contracts to hedge its net investment in its China subsidiary, East West Bank (China) Limited, a non-USD functional currency subsidiary in China. These foreign currency non-deliverable forward contracts were designated as net investment hedges. The fair value of foreign currency non-deliverable forward contracts is determined by comparing the contracted foreign exchange rate to the current market foreign exchange rate. Key inputs of the current market exchange rate include spot rates and forward rates of the contractual currencies. Foreign exchange 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. Credit Contracts — The Company may periodically enter into credit risk participation agreements (“RPAs”) to manage the credit exposure on interest rate contracts associated with the syndicated loans. The Company may enter into protection sold or protection purchased RPAs with institutional counterparties. The fair value of RPAs is calculated by determining the total expected asset or 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. Since the majority of the inputs used to value the RPAs are observable, RPAs are classified as Level 2. Equity Contracts — As part of the loan origination process, the Company periodically obtains warrants to purchase preferred and/or common stock of technology and life sciences companies to which it provides loans. As of December 31, 2021 and 2020, the warrants included on the Consolidated Financial Statements were from both public and private companies. The Company values these warrants based on the Black-Scholes option pricing model. For warrants from public companies, the model uses the underlying stock price, stated strike price, warrant expiration date, risk-free interest rate based on a duration-matched U.S. Treasury rate and market-observable company-specific option volatility as inputs to value the warrants. Due to the observable nature of the inputs used in deriving the estimated fair value, warrants from public companies are classified as Level 2. For warrants from private companies, the model uses inputs such as the offering price observed in the most recent round of funding, stated strike price, warrant expiration date, risk-free interest rate based on duration-matched U.S. Treasury rate and option volatility. The Company applies proxy volatilities based on the industry sectors of the private companies. The model values are then adjusted for a general lack of liquidity due to the private nature of the underlying companies. Since both option volatility and liquidity discount assumptions are subject to management’s judgment, measurement uncertainty is inherent in the valuation of private companies’ warrants. Due to the unobservable nature of the option volatility and liquidity discount assumptions used in deriving the estimated fair value, warrants from private companies are classified as Level 3. On a quarterly basis, the changes in the fair value of warrants from private companies are reviewed for reasonableness, and a measurement of uncertainty analysis on the option volatility and liquidity discount assumptions is performed. Commodity Contracts — The Company enters into energy commodity contracts in the form of swaps and options with its oil and gas loan customers to allow them to hedge against the risk of fluctuation in energy commodity prices. The fair value of the commodity option contracts is determined using the Black-Scholes model with assumptions that include expectations of future commodity price and volatility. The future commodity contract price is derived from observable inputs such as the market price of the commodity. Commodity swaps are structured as an exchange of fixed cash flows for floating cash flows. The fair value of the commodity 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) based on the market prices of the commodity. The fixed cash flows are predetermined based on the known volumes and fixed price as specified in the swap agreement. The floating cash flows are correlated with the change of forward commodity prices, which is derived from market corroborated futures settlement prices. As a result, the Company classifies these derivative instruments as Level 2 due to the observable nature of the significant inputs utilized. The following tables present financial assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2021 and 2020: ($ in thousands) Assets and Liabilities Measured at Fair Value on a Recurring Basis Quoted Prices in Significant Significant Total AFS debt securities: U.S. Treasury securities $ 1,032,681 $ — $ — $ 1,032,681 U.S. government agency and U.S. government sponsored enterprise debt securities — 1,301,971 — 1,301,971 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities — 1,228,980 — 1,228,980 Residential mortgage-backed securities — 2,928,283 — 2,928,283 Municipal securities — 523,158 — 523,158 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 496,443 — 496,443 Residential mortgage-backed securities — 881,931 — 881,931 Corporate debt securities — 649,665 — 649,665 Foreign government bonds — 257,733 — 257,733 Asset-backed securities — 74,558 — 74,558 Collateralized loan obligations (“CLOs”) — 589,950 — 589,950 Total AFS debt securities $ 1,032,681 $ 8,932,672 $ — $ 9,965,353 Investments in tax credit and other investments: Equity securities $ 22,130 $ 4,474 $ — $ 26,604 Total investments in tax credit and other investments $ 22,130 $ 4,474 $ — $ 26,604 Derivative assets: Interest rate contracts $ — $ 240,222 $ — $ 240,222 Foreign exchange contracts — 21,033 — 21,033 Credit contracts — — — — Equity contracts — 5 215 220 Commodity contracts — 222,709 — 222,709 Gross derivative assets $ — $ 483,969 $ 215 $ 484,184 Netting adjustments (1) $ — $ (100,953) $ — $ (100,953) Net derivative assets $ — $ 383,016 $ 215 $ 383,231 Derivative liabilities: Interest rate contracts $ — $ 179,962 $ — $ 179,962 Foreign exchange contracts — 15,501 — 15,501 Credit contracts — 141 — 141 Commodity contracts — 194,567 — 194,567 Gross derivative liabilities $ — $ 390,171 $ — $ 390,171 Netting adjustments (1) $ — $ (232,727) $ — $ (232,727) Net derivative liabilities $ — $ 157,444 $ — $ 157,444 ($ in thousands) Assets and Liabilities Measured at Fair Value on a Recurring Basis Quoted Prices in Significant Significant Total AFS debt securities: U.S. Treasury securities $ 50,761 $ — $ — $ 50,761 U.S. government agency and U.S. government sponsored enterprise debt securities — 814,319 — 814,319 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities — 1,153,770 — 1,153,770 Residential mortgage-backed securities — 1,660,894 — 1,660,894 Municipal securities — 396,073 — 396,073 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 239,842 — 239,842 Residential mortgage-backed securities — 289,775 — 289,775 Corporate debt securities — 405,968 — 405,968 Foreign government bonds — 182,531 — 182,531 Asset-backed securities — 63,231 — 63,231 CLOs — 287,494 — 287,494 Total AFS debt securities $ 50,761 $ 5,493,897 $ — $ 5,544,658 Investments in tax credit and other investments: Equity securities $ 22,548 $ 8,724 $ — $ 31,272 Total investments in tax credit and other investments $ 22,548 $ 8,724 $ — $ 31,272 Derivative assets: Interest rate contracts $ — $ 489,132 $ — $ 489,132 Foreign exchange contracts — 30,300 — 30,300 Credit contracts — 13 — 13 Equity contracts — 585 273 858 Commodity contracts — 82,451 — 82,451 Gross derivative assets $ — $ 602,481 $ 273 $ 602,754 Netting adjustments (1) $ — $ (101,512) $ — $ (101,512) Net derivative assets $ — $ 500,969 $ 273 $ 501,242 Derivative liabilities: Interest rate contracts $ — $ 317,698 $ — $ 317,698 Foreign exchange contracts — 22,759 — 22,759 Credit contracts — 206 — 206 Commodity contracts — 84,165 — 84,165 Gross derivative liabilities $ — $ 424,828 $ — $ 424,828 Netting adjustments (1) $ — $ (184,697) $ — $ (184,697) Net derivative liabilities $ — $ 240,131 $ — $ 240,131 (1) Represents balance sheet netting of derivative assets and liabilities and related cash collateral under master netting agreements or similar agreements. See Note 5 — Derivatives to the Consolidated Financial Statements in this Form 10-K for additional information. For the years ended December 31, 2021, 2020 and 2019, Level 3 fair value measurements that were measured on a recurring basis consisted of warrants issued by private companies. The following table provides a reconciliation of the beginning and ending balances of these equity contracts for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Equity Contracts Beginning balance $ 273 $ 421 $ 673 Total gains included in earnings (1) 32 8,225 563 Issuances 12 — 114 Settlements (96) — (929) Transfers out of Level 3 (2) (6) (8,373) — Ending balance $ 215 $ 273 $ 421 (1) Include both realized and unrealized gain (losses) recorded in Lending fees on the Consolidated Statement of Income. The unrealized (losses) gains were $(44) thousand, $8.2 million, and $(292) thousand for the years ended December 31, 2021, 2020 and 2019, respectively. (2) During the years ended December 31, 2021 and 2020, the Company transferred $6 thousand and $8.4 million, respectively, of equity contracts measured on a recurring basis out of Level 3 into Level 2 after the corresponding issuer of the equity warrant, which was previously a private company, completed its initial public offering and became a public company. The following table presents quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements as of December 31, 2021 and 2020. The significant unobservable inputs presented in the table below are those that the Company considers significant to the fair value of the Level 3 assets. The Company considers unobservable inputs to be significant if, by their exclusion, the fair value of the Level 3 assets would be impacted by a predetermined percentage change. ($ in thousands) Fair Value Valuation Unobservable Range of Weighted- Average of Inputs (1) December 31, 2021 Derivative assets: Equity contracts $ 215 Black-Scholes option pricing model Equity volatility 44% — 54% 49% Liquidity discount 47% 47% December 31, 2020 Derivative assets: Equity contracts $ 273 Black-Scholes option pricing model Equity volatility 46% — 61% 53% Liquidity discount 47% 47% (1) Weighted-average of inputs is calculated based on the fair value of equity contracts as of December 31, 2021 and 2020. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Assets measured at fair value on a nonrecurring basis include certain individually evaluated loans held-for-investment, investments in qualified affordable housing partnerships, tax credit and other investments, OREO, loans held-for-sale, and other nonperforming assets. Nonrecurring fair value adjustments result from impairment on certain individually evaluated loans held-for-investment and investments in qualified affordable housing partnerships, tax credit and other investments, from write-downs of OREO and other nonperforming assets, or from the application of lower of cost or fair value on loans held-for-sale. Individually Evaluated Loans Held-for-Investment — Individually evaluated loans held-for-investment are classified as Level 3 assets. The following two methods are used to derive the fair value of individually evaluated loans held-for-investment: • Discounted cash flow valuation techniques that consist of developing an expected stream of cash flows over the life of the loans, and then calculating the present value of the loans by discounting the expected cash flows at a designated discount rate. • When the repayment of an individually evaluated loan is dependent on the sale of the collateral, the fair value of the loan is determined based on the fair value of the underlying collateral, which may take the form of real estate, inventory, equipment, contracts or guarantees. The fair value of the underlying collateral is generally based on third-party appraisals, or an internal valuation if a third-party appraisal is not required by regulations, or unavailable. An internal valuation utilizes one or more valuation techniques such as the income, market and/or cost approaches. Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments — The Company conducts due diligence on its investments in qualified affordable housing partnerships, tax credit and other investments prior to the initial investment date and through the placed-in-service date. After these investments are either acquired or placed into service, the Company continues its periodic monitoring process to ensure book values are realizable and that there is no significant tax credit recapture risk. This monitoring process includes the quarterly review of the financial statements, the annual review of tax returns of the investment entity, the annual review of the financial statements of the guarantor (if any) and a comparison of the actual performance of the investment against the financial projections prepared at the time when the investment was made. The Company assesses its tax credit and other investments for possible OTTI on an annual basis or when events or circumstances suggest that the carrying amount of the investments may not be realizable. These circumstances can include, but are not limited to the following factors: • expected future cash flows that are less than the carrying amoun t of the investment; • changes in the economic, market or technological environment that could adversely affect the investee’s operations; and • other factors that raise doubt about the investee’s ability to continue as a going concern, such as negative cash flows from operations and the continuing prospects of the underlying operations of the investment. All available evidence is considered in assessing whether a decline in value is other-than-temporary. Generally, none of the aforementioned factors are individually conclusive and the relative importance placed on individual facts may vary depending on the situation. In accordance with ASC 323-10-35-32, an impairment charge would only be recognized in earnings for a decline in value that is determined to be other-than-temporary. Other Real Estate Owned — The Company’s OREO represents properties acquired through foreclosure, or through full or partial satisfaction of loans held-for-investment. These OREO properties are recorded at estimated fair value less the costs to sell at the time of foreclosure and at the lower of cost or estimated fair value less the costs to sell subsequent to acquisition. On a monthly basis, the current fair market value of each OREO property is reviewed to ensure that the current carrying value is appropriate. OREO properties are classified as Level 3. Other Nonperforming Assets — Other nonperforming assets are recorded at fair value upon transfers from loans to foreclosed assets. Subsequently, foreclosed assets are recorded at the lower of carrying value or fair value. Fair value is based on independent market prices, appraised values of the collateral or management’s estimates of the foreclosed asset. The Company records an impairment when the foreclosed asset’s fair value declines below its carrying value. Fair value measurements of other nonperforming assets are classified within one of the three levels in a valuation hierarchy based upon the observability of inputs to the valuation as of the measurement date. The following tables present the carrying amounts of assets that were still held and had fair value adjustments measured on a nonrecurring basis as of December 31, 2021 and 2020: ($ in thousands) Assets Measured at Fair Value on a Nonrecurring Basis Quoted Prices in Significant Significant Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 102,349 $ 102,349 CRE: CRE — — 21,891 21,891 Total commercial — — 124,240 124,240 Consumer: Residential mortgage: HELOCs — — 2,744 2,744 Total consumer — — 2,744 2,744 Total loans held-for-investment $ — $ — $ 126,984 $ 126,984 Other nonperforming assets $ 391 $ — $ — $ 391 ($ in thousands) Assets Measured at Fair Value on a Nonrecurring Basis Quoted Prices in Significant Significant Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 143,331 $ 143,331 CRE: CRE — — 42,894 42,894 Total commercial — — 186,225 186,225 Consumer: Residential mortgage: HELOCs — — 1,146 1,146 Other consumer — — 2,491 2,491 Total consumer — — 3,637 3,637 Total loans held-for-investment $ — $ — $ 189,862 $ 189,862 Investments in tax credit and other investments, net $ — $ — $ 3,140 $ 3,140 OREO (1) $ — $ — $ 15,824 $ 15,824 (1) Amounts are included in Other assets on the Consolidated Balance Sheet and represent the carrying value of OREO properties that were written down subsequent to their initial classification as OREO. The following table presents the increase (decrease) in the fair value of certain assets held at the end of the respective reporting periods, for which a nonrecurring fair value adjustment was recognized for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Loans held-for-investment (1) : Commercial: C&I $ (9,580) $ (48,154) $ (35,365) CRE: CRE (10,231) (11,289) 9 Total commercial (19,811) (59,443) (35,356) Consumer: Residential mortgage: HELOCs (4) (175) (2) Other consumer — 2,491 — Total consumer $ (4) $ 2,316 $ (2) Total loans held-for-investment $ (19,815) $ (57,127) $ (35,358) Investments in tax credit and other investments, net $ 877 $ (3,868) $ (13,023) OREO $ — $ (3,680) $ (8) Other nonperforming assets $ (4,241) $ — $ (3,000) (1) Excludes loans fully charged off. The following table presents the quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements that are measured on a nonrecurring basis as of December 31, 2021 and 2020: ($ in thousands) Fair Value Valuation Unobservable Range of Weighted- (1) December 31, 2021 Loans held-for-investment $ 64,919 Discounted cash flows Discount 4% — 15% 7% $ 38,537 Fair value of collateral Discount 15% — 75% 41% $ 23,528 Fair value of property Selling cost 8% 8% December 31, 2020 Loans held-for-investment $ 104,783 Discounted cash flows Discount 3% — 15% 11% $ 22,207 Fair value of collateral Discount 10% — 26% 15% $ 15,879 Fair value of collateral Contract value NM NM $ 46,993 Fair value of property Selling cost 7% — 26% 10% Investments in tax credit and other investments, net $ 3,140 Individual analysis of each investment Expected future tax NM NM OREO $ 15,824 Fair value of property Selling cost 8% 8% NM — Not meaningful . (1) Weighted-average of inputs is based on the relative fair value of the respective assets as of December 31, 2021 and 2020. Disclosures about the Fair Value of Financial Instruments The following tables present the fair value estimates for financial instruments as of December 31, 2021 and 2020, excluding financial instruments recorded at fair value on a recurring basis as they are included in the tables presented elsewhere in this Note. The carrying amounts in the following tables are recorded on the Consolidated Balance Sheet under the indicated captions, except for accrued interest receivable and mortgage servicing rights which are included in Other assets , and accrued interest payable which is included in Accrued expenses and other liabilities . These financial assets and liabilities are measured at amortized cost basis on the Company’s Consolidated Balance Sheet. ($ in thousands) December 31, 2021 Carrying Level 1 Level 2 Level 3 Estimated Financial assets: Cash and cash equivalents $ 3,912,935 $ 3,912,935 $ — $ — $ 3,912,935 Interest-bearing deposits with banks $ 736,492 $ — $ 736,492 $ — $ 736,492 Resale agreements $ 2,353,503 $ — $ 2,335,901 $ — $ 2,335,901 Restricted equity securities, at cost $ 77,434 $ — $ 77,434 $ — $ 77,434 Loans held-for-sale $ 635 $ — $ 635 $ — $ 635 Loans held-for-investment, net $ 41,152,202 $ — $ — $ 41,199,599 $ 41,199,599 Mortgage servicing rights $ 5,706 $ — $ — $ 9,104 $ 9,104 Accrued interest receivable $ 159,833 $ — $ 159,833 $ — $ 159,833 Financial liabilities: Demand, checking, savings and money market deposits $ 45,388,550 $ — $ 45,388,550 $ — $ 45,388,550 Time deposits $ 7,961,982 $ — $ 7,966,116 $ — $ 7,966,116 FHLB advances $ 249,331 $ — $ 250,372 $ — $ 250,372 Repurchase agreements $ 300,000 $ — $ 310,525 $ — $ 310,525 Long-term debt $ 147,658 $ — $ 151,020 $ — $ 151,020 Accrued interest payable $ 11,435 $ — $ 11,435 $ — $ 11,435 ($ in thousands) December 31, 2020 Carrying Level 1 Level 2 Level 3 Estimated Financial assets: Cash and cash equivalents $ 4,017,971 $ 4,017,971 $ — $ — $ 4,017,971 Interest-bearing deposits with banks $ 809,728 $ — $ 809,728 $ — $ 809,728 Resale agreements $ 1,460,000 $ — $ 1,464,635 $ — $ 1,464,635 Restricted equity securities, at cost $ 83,046 $ — $ 83,046 $ — $ 83,046 Loans held-for-sale $ 1,788 $ — $ 1,788 $ — $ 1,788 Loans held-for-investment, net $ 37,770,972 $ — $ — $ 37,803,940 $ 37,803,940 Mortgage servicing rights $ 5,522 $ — $ — $ 8,435 $ 8,435 Accrued interest receivable $ 150,140 $ — $ 150,140 $ — $ 150,140 Financial liabilities: Demand, checking, savings and money market deposits $ 35,862,403 $ — $ 35,862,403 $ — $ 35,862,403 Time deposits $ 9,000,349 $ — $ 9,016,884 $ — $ 9,016,884 Short-term borrowings $ 21,009 $ — $ 21,009 $ — $ 21,009 FHLB advances $ 652,612 $ — $ 659,631 $ — $ 659,631 Repurchase agreements $ 300,000 $ — $ 317,850 $ — $ 317,850 Long-term debt $ 147,376 $ — $ 150,131 $ — $ 150,131 Accrued interest payable $ 11,956 $ — $ 11,956 $ — $ 11,956

Assets Purchased under Resale A

Assets Purchased under Resale Agreements and Sold under Repurchase Agreements	12 Months Ended
	Dec. 31, 2021
RESALE AND REPURCHASE AGREEMENTS
Assets Purchased under Resale Agreements and Sold under Repurchase Agreements	Assets Purchased under Resale Agreements and Sold under Repurchase Agreements Assets Purchased under Resale Agreements In resale agreements, the Company is exposed to credit risk for both counterparties and the underlying collateral. The company manages credit exposure from certain transactions by entering into master netting agreements and collateral arrangements with the counterparties. The relevant agreements allow for the efficient closeout of the transaction, liquidation and set-off of collateral against the net amount owed by the counterparty following a default. It is also the Company’s policy to take possession, where possible, of the assets underlying resale agreements. As a result of the Company’s credit risk mitigation practices with respect to resale agreements as described above, the Company did not hold any reserves for credit impairment related to these agreements as of December 31, 2021 and 2020. Securities Purchased under Resale Agreements — Total securities purchased under resale agreements were $1.33 billion and $1.16 billion as of December 31, 2021 and 2020, respectively. The weighted-average yields were 1.53%, 1.94% and 2.66% for the years ended December 31, 2021, 2020 and 2019, respectively. Loans Purchased under Resale Agreements — The Company participated in resale agreements collateralized with loans starting in the fourth quarter of 2020. As of December 31, 2021 and 2020, total loans purchased under resale agreements were $1.02 billion and $300.0 million, respectively . The weighted-average yields were 1.53% and 2.27% for the years ended December 31, 2021 and 2020, respectively. Assets Sold under Repurchase Agreements — As of December 31, 2021, securities sold under the repurchase agreements consisted of U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities, and U.S. Treasury securities. Gross repurchase agreements were $300.0 million as of both December 31, 2021 and 2020, respectively. The weighted-average interest rates were 2.61%, 3.25% and 4.74% for the years ended December 31, 2021, 2020 and 2019, respectively. There were no extinguishment charges recorded in 2021 and 2019. In comparison, for the year ended December 31, 2020, the Company recorded $8.7 million of charges related to the extinguishment of $150.0 million of repurchase agreements. As of December 31, 2021, all repurchase agreements will mature in 2023. Balance Sheet Offsetting The Company’s resale and repurchase agreements are transacted under legally enforceable master netting agreements that, in the event of default by the counterparty, provide the Company the right to liquidate assets held and to offset receivables and payables with the same counterparty. The Company nets resale and repurchase transactions with the same counterparty on the Consolidated Balance Sheet when it has a legally enforceable master netting agreement and the transactions are eligible for netting under ASC 210-20-45-11, Balance Sheet Offsetting: Repurchase and Reverse Repurchase Agreements . Collateral received includes assets that are not recognized on the Consolidated Balance Sheet. Collateral pledged consists of assets that are not netted on the Consolidated Balance Sheet against the related collateralized liability. Collateral received or pledged in resale and repurchase agreements with other financial institutions may also be sold or re-pledged by the secured party, and is usually delivered to and held by the third-party trustees. The collateral amounts received/pledged are limited for presentation purposes to the related recognized asset/liability balance for each counterparty, and accordingly, do not include excess collateral received/pledged. The following tables present the resale and repurchase agreements included on the Consolidated Balance Sheet as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Assets Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Received Resale agreements $ 2,353,503 $ — $ 2,353,503 $ (2,327,687) (1) $ 25,816 Liabilities Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Pledged Repurchase agreements $ 300,000 $ — $ 300,000 $ (300,000) (2) $ — ($ in thousands) December 31, 2020 Assets Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Received Resale agreements $ 1,460,000 $ — $ 1,460,000 $ (1,458,700) (1) $ 1,300 Liabilities Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Pledged Repurchase agreements $ 300,000 $ — $ 300,000 $ (300,000) (2) $ — (1) Represents the fair value of assets the Company has received under resale agreements, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above. There was no netting of repurchase agreements against resale agreements for the year ended December 31, 2021. (2) Represents the fair value of assets the Company has pledged under repurchase agreements, limited for table presentation purposes to the amount of the recognized liability due to each counterparty. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above. There was no netting of repurchase agreements against resale agreements for the year ended December 31, 2021. In addition to the amounts included in the tables above, the Company also has balance sheet netting related to derivatives. Refer to Note 5 — Derivatives to the Consolidated Financial Statements in this Form 10-K for additional information.

Securities

Securities	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The following tables present the amortized cost, gross unrealized gains and losses, and fair value by major categories of AFS debt securities as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Amortized Gross Gross Fair AFS debt securities: U.S. Treasury securities $ 1,049,238 $ 130 $ (16,687) $ 1,032,681 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,333,984 2,697 (34,710) 1,301,971 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 1,242,043 15,791 (28,854) 1,228,980 Residential mortgage-backed securities 2,968,789 8,629 (49,135) 2,928,283 Municipal securities 519,381 10,065 (6,288) 523,158 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 498,920 3,000 (5,477) 496,443 Residential mortgage-backed securities 889,937 971 (8,977) 881,931 Corporate debt securities 657,516 8,738 (16,589) 649,665 Foreign government bonds 260,447 767 (3,481) 257,733 Asset-backed securities 74,674 185 (301) 74,558 CLOs 592,250 52 (2,352) 589,950 Total AFS debt securities $ 10,087,179 $ 51,025 $ (172,851) $ 9,965,353 ($ in thousands) December 31, 2020 Amortized Gross Gross Fair AFS debt securities: U.S. Treasury securities $ 50,310 $ 451 $ — $ 50,761 U.S. government agency and U.S. government-sponsored enterprise debt securities 806,814 8,765 (1,260) 814,319 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 1,125,174 34,306 (5,710) 1,153,770 Residential mortgage-backed securities 1,634,553 27,952 (1,611) 1,660,894 Municipal securities 382,573 13,588 (88) 396,073 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 234,965 6,107 (1,230) 239,842 Residential mortgage-backed securities 288,520 1,761 (506) 289,775 Corporate debt securities 406,323 3,493 (3,848) 405,968 Foreign government bonds 183,828 163 (1,460) 182,531 Asset-backed securities 63,463 10 (242) 63,231 CLOs 294,000 — (6,506) 287,494 Total AFS debt securities $ 5,470,523 $ 96,596 $ (22,461) $ 5,544,658 The amortized cost of AFS debt securities excludes accrued interest receivables, which are a component of Other assets on the Consolidated Balance Sheet. The accrued interest receivables for AFS debt securities were $33.1 million and $22.3 million as of December 31, 2021 and 2020, respectively. For the Company’s accounting policy related to AFS debt securities’ accrued interest receivable, see Note 1 — Summary of Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities to the Consolidated Financial Statements in this Form 10-K. Unrealized Losses The following tables present the fair value and the associated gross unrealized losses of the Company’s AFS debt securities, aggregated by investment category and the length of time that the securities have been in a continuous unrealized loss position, as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Less Than 12 Months 12 Months or More Total Fair Gross Fair Gross Fair Gross AFS debt securities: U.S. Treasury securities $ 935,776 $ (14,689) $ 47,881 $ (1,998) $ 983,657 $ (16,687) U.S. government agency and U.S. government-sponsored enterprise debt securities 773,647 (18,000) 402,907 (16,710) 1,176,554 (34,710) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 440,734 (13,589) 257,745 (15,265) 698,479 (28,854) Residential mortgage-backed securities 2,138,542 (37,691) 330,522 (11,444) 2,469,064 (49,135) Municipal securities 177,065 (5,682) 17,003 (606) 194,068 (6,288) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 301,925 (4,158) 40,013 (1,319) 341,938 (5,477) Residential mortgage-backed securities 707,792 (8,966) 6,431 (11) 714,223 (8,977) Corporate debt securities 183,916 (3,084) 251,494 (13,505) 435,410 (16,589) Foreign government bonds 27,097 (5) 133,279 (3,476) 160,376 (3,481) Asset-backed securities 24,885 (301) — — 24,885 (301) CLOs 221,586 (64) 291,712 (2,288) 513,298 (2,352) Total AFS debt securities $ 5,932,965 $ (106,229) $ 1,778,987 $ (66,622) $ 7,711,952 $ (172,851) ($ in thousands) December 31, 2020 Less Than 12 Months 12 Months or More Total Fair Gross Fair Gross Fair Gross AFS debt securities: U.S. Treasury securities $ 352,521 $ (1,260) $ — $ — $ 352,521 $ (1,260) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 292,596 (5,656) 3,543 (54) 296,139 (5,710) Residential mortgage-backed securities 342,561 (1,611) — — 342,561 (1,611) Municipal securities 24,529 (88) — — 24,529 (88) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 58,738 (1,230) 7,920 — 66,658 (1,230) Residential mortgage-backed securities 90,156 (506) — — 90,156 (506) Corporate debt securities 251,674 (3,645) 9,798 (203) 261,472 (3,848) Foreign government bonds 106,828 (1,460) — — 106,828 (1,460) Asset-backed securities — — 34,104 (242) 34,104 (242) CLOs — — 287,494 (6,506) 287,494 (6,506) Total AFS debt securities $ 1,519,603 $ (15,456) $ 342,859 $ (7,005) $ 1,862,462 $ (22,461) As of December 31, 2021, the Company had 431 AFS debt securities in a gross unrealized loss position with no credit impairment, consisting primarily of 180 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities, 50 U.S. government agency and U.S. government-sponsored agency debt securities, 21 U.S. Treasury securities, and 30 corporate debt securities. In comparison, as of December 31, 2020, the Company had 104 AFS debt securities in a gross unrealized loss position with no credit impairment, consisting primarily of three CLOs, 46 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities, and 17 corporate debt securities. Allowance for Credit Losses Each reporting period, the Company assesses each AFS debt security that is in an unrealized loss position to determine whether the decline in fair value below the amortized cost basis resulted from a credit loss or other factors. For a discussion of the factors and criteria the Company uses in analyzing securities for impairment related to credit losses, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities to the Consolidated Financial Statements in this Form 10-K. The gross unrealized losses presented in the above tables were primarily attributable to interest rate movement. Securities that were in unrealized loss positions as of December 31, 2021 were mainly comprised of the following: • U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities — The market value decline as of December 31, 2021, was primarily due to interest rate movement. Since these securities (issued by Ginnie Mae, Freddie Mac, and Fannie Mae) are guaranteed or sponsored by agencies of the U.S. government, and the credit profiles are strong (rated Aaa, AA+ and AAA by Moody’s Investors Service (“Moody’s”), Standard & Poor's (“S&P”), and Fitch Ratings (“Fitch”), respectively), the Company expects to receive all contractual cash flows on time. • U.S. government agency and U.S. government-sponsored agency debt securities — The market value decline as of December 31, 2021, was primarily due to interest rate movement. These securities are guaranteed or issued by entities sponsored by the U.S. government and the credit profiles are strong. The Company expects to receive all contractual cash flows on time. These securities consisted of the debt securities issued by: • Federal Farm Credit Bank, Fannie Mae, Freddie Mac, and U.S. International Development Finance Corporation (rated Aaa, AA+ and AAA by Moody’s, S&P and Fitch, respectively). • FHLB (rated Aaa and AA+ by Moody’s and S&P, respectively). • U.S. Treasury securities — The market value decline as of December 31, 2021, was primarily due to interest rate movement. These securities are backed by the full faith of the U.S. government and are rated Aaa, AA+, and AAA by Moody’s, S&P, and Fitch, respectively. The Company expects to receive all contractual cash flows on time. • Corporate debt securities — The market value decline as of December 31, 2021, was primarily due to interest rate movement and spread widening. Since the credit profiles of these securities are strong (rated BBB- or higher by Moody’s, S&P, Fitch, and Kroll Bond Rating Agency), and the contractual payments from these securities have been and are expected to be received on time, the Company believes that the risk of credit losses on these securities is low. Overall, the Company believes that the credit support levels of the AFS debt securities are strong and, based on current assessments and macroeconomic forecasts, expects that full contractual cash flows will be received even if near-term credit performance could possibly be impacted by the COVID-19 pandemic, including new and more contagious variants. As of December 31, 2021, the Company had the intent to hold the AFS debt securities with unrealized losses through the anticipated recovery period and it was more-likely-than-not that the Company will not have to sell these securities before recovery of their amortized cost. The issuers of these securities have not, to the Company’s knowledge, established any cause for default on these securities. As a result, the Company expects to recover the entire amortized cost basis of these securities. Accordingly, there was no allowance for credit losses as of both December 31, 2021 and 2020 against these securities, and there was no provision for credit losses recognized for the years ended December 31, 2021 and 2020. For the year ended December 31, 2019, there was no OTTI credit loss recognized. Realized Gains and Losses The following table presents gross realized gains and tax expense related to the sales of AFS debt securities for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Gross realized gains $ 1,568 $ 12,299 $ 3,930 Related tax expense $ 464 $ 3,636 $ 1,162 Contractual Maturities of Available-for-Sale Debt Securities The following table presents the contractual maturities of AFS debt securities as of December 31, 2021. Expected maturities will differ from contractual maturities on certain securities as the issuers and borrowers of the underlying collateral may have the right to call or prepay obligations with or without prepayment penalties. ($ in thousands) Amortized Cost Fair Value Due within one year $ 1,482,716 $ 1,440,069 Due after one year through five years 1,191,837 1,189,880 Due after five years through ten years 1,413,217 1,408,494 Due after ten years 5,999,409 5,926,910 Total AFS debt securities $ 10,087,179 $ 9,965,353 As of December 31, 2021 and 2020, AFS debt securities with fair value of $803.9 million and $588.5 million, respectively, were pledged to secure public deposits, repurchase agreements and for other purposes required or permitted by law. Restricted Equity Securities The following table presents the restricted equity securities on the Consolidated Balance Sheet as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 FRBSF stock $ 60,184 $ 59,249 FHLB stock 17,250 23,797 Total restricted equity securities $ 77,434 $ 83,046

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives The Company uses derivatives to manage exposure to market risk, primarily interest rate and foreign currency risk, as well as 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 do not significantly affect earnings or capital. The Company also uses foreign exchange contracts to manage the foreign exchange rate risk associated with certain foreign currency-denominated assets and liabilities, as well as the Bank’s investment in East West Bank (China) Limited. The Company recognizes all derivatives on the Consolidated Balance Sheet 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, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Derivatives to the Consolidated Financial Statements in this Form 10-K. The following table presents the notional amounts and gross fair values of the Company’s derivatives, as well as the balance sheet netting adjustments on an aggregate basis as of December 31, 2021 and 2020. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of December 31, 2021 and 2020. The resulting net derivative asset and liability fair values are included in Other assets and Accrued expenses and other liabilities , respectively, on the Consolidated Balance Sheet. ($ in thousands) December 31, 2021 December 31, 2020 Notional Fair Value Notional Fair Value Derivative Derivative Derivative Derivative Derivatives designated as hedging instruments: Cash flow hedges: Interest rate contracts $ 275,000 $ — $ 57 $ 275,000 $ — $ 1,864 Net investment hedges: Foreign exchange contracts 86,531 — 225 84,269 — 235 Total derivatives designated as hedging instruments $ 361,531 $ — $ 282 $ 359,269 $ — $ 2,099 Derivatives not designated as hedging instruments: Interest rate contracts $ 17,575,420 $ 240,222 $ 179,905 $ 18,155,678 $ 489,132 $ 315,834 Foreign exchange contracts 1,874,681 21,033 15,276 3,108,488 30,300 22,524 Credit contracts 72,560 — 141 76,992 13 206 Equity contracts — (1) 220 — — (1) 858 — Commodity contracts — (2) 222,709 194,567 — (2) 82,451 84,165 Total derivatives not designated as hedging instruments $ 19,522,661 $ 484,184 $ 389,889 $ 21,341,158 $ 602,754 $ 422,729 Gross derivative assets/liabilities $ 484,184 $ 390,171 $ 602,754 $ 424,828 Less: Master netting agreements (58,679) (58,679) (93,063) (93,063) Less: Cash collateral received/paid (42,274) (174,048) (8,449) (91,634) Net derivative assets/liabilities $ 383,231 $ 157,444 $ 501,242 $ 240,131 (1) The Company held equity contracts in one public company and 12 private companies as of December 31, 2021. In comparison, the Company held equity contracts in two public companies and 17 private companies as of December 31, 2020. (2) The notional amount of the Company’s commodity contracts entered with its customers totaled 7,519 thousand barrels of crude oil and 83,274 thousand units of natural gas, measured in million British thermal units (“MMBTUs”) as of December 31, 2021. In comparison, the notional amount of the Company’s commodity contracts entered with its customers totaled 6,321 thousand barrels of crude oil and 109,635 thousand MMBTUs of natural gas as of December 31, 2020. The Company simultaneously entered into the offsetting commodity contracts with mirrored terms with third-party financial institutions. Derivatives Designated as Hedging Instruments Fair Value Hedges — The Company entered into interest rate swaps designated as fair value hedges to hedge changes in the fair value of certain certificates of deposit due to changes in the benchmark interest rate. The interest rate swaps involved the exchange of variable-rate payments over the life of the agreements without exchanging the underlying notional amounts. During 2020, both the hedging interest rate swaps and hedged certificates of deposit were called. As of both December 31, 2021 and 2020, there were no fair value hedges or hedged certificates of deposit outstanding. The following table presents the net gains (losses) recognized on the Consolidated Statement of Income related to the derivatives designated as fair value hedges for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Gains (losses) recorded in interest expense: Recognized on interest rate swaps $ — $ 3,146 $ 2,655 Recognized on certificates of deposit $ — $ (1,605) $ (2,536) Cash Flow Hedges — The Company entered into interest rate swaps that were designated and qualified as cash flow hedges during 2020 to hedge the variability in interest payments on certain floating-rate borrowings. For cash flow hedges, the entire change in the fair value of the hedging instruments is recognized in AOCI and reclassified to earnings in the same period when the hedged cash flows impact earnings. Reclassified gains and losses on interest rate swaps are recorded in the same line item as the interest payments of the hedged long-term borrowings within Interest expense in the Consolidated Statements of Income. Considering the interest rates, yield curve and notional amounts as of December 31, 2021, the Company expects to reclassify an estimated $28 thousand of after-tax net gains on derivative instruments designated as cash flow hedges from AOCI into earnings during the next 12 months. The following table presents the pre-tax changes in AOCI from cash flow hedges for the years ended December 31, 2021, 2020 and 2019. The after-tax impact of cash flow hedges on AOCI is shown in Note 15 — Accumulated Other Comprehensive Income (Loss) to the Consolidated Financial Statements in this Form-10-K. ($ in thousands) Year Ended December 31, 2021 2020 2019 Gains (losses) recognized in AOCI $ 1,210 $ (1,604) $ — (Losses) gains reclassified from AOCI to interest expense $ (868) $ 113 $ — Net Investment Hedges — ASC 830-20, Foreign Currency Matters — Foreign Currency Transactions and ASC 815, Derivatives and Hedging, allow hedging of the foreign currency risk of a net investment in a foreign operation. The Company enters into foreign currency forward contracts to hedge a portion of the Bank’s 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 Bank’s net investment in East West Bank (China) Limited, against the risk of adverse changes in the foreign currency exchange rate of the RMB. The Company may de-designate the net investment hedges when the Company expects the hedge will cease to be highly effective. The following table presents the after-tax losses recognized in AOCI on net investment hedges for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Losses recognized in AOCI $ (3,264) $ (4,801) $ (471) Derivatives Not Designated as Hedging Instruments Interest Rate Contracts — The Company enters into interest rate contracts, which include interest rate swaps and options with its customers to allow the customers 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 offsetting interest rate contracts with third-party financial institutions, including central clearing organizations. The following tables present the notional amounts and the gross fair values of interest rate derivative contracts outstanding as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Written options $ 1,118,074 $ — $ 2,148 Purchased options $ 1,118,074 $ 2,159 $ — Sold collars and corridors 194,181 1,272 642 Collars and corridors 194,181 646 1,275 Swaps 7,460,836 211,727 39,650 Swaps 7,490,074 24,418 136,190 Total $ 8,773,091 $ 212,999 $ 42,440 Total $ 8,802,329 $ 27,223 $ 137,465 ($ in thousands) December 31, 2020 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Written options $ 957,393 $ — $ 115 Purchased options $ 957,393 $ 101 $ 15 Sold collars and corridors 518,477 7,673 — Collars and corridors 518,477 — 7,717 Swaps 7,586,414 479,634 1,364 Swaps 7,617,524 1,724 306,623 Total $ 9,062,284 $ 487,307 $ 1,479 Total $ 9,093,394 $ 1,825 $ 314,355 Included in the total notional amount of $8.80 billion of interest rate contracts entered into with financial counterparties as of December 31, 2021, was a notional amount of $2.79 billion of interest rate swaps that cleared through the London Clearing House (“LCH”). Applying variation margin payments as settlement to LCH cleared derivative transactions resulted in a reduction in derivative asset fair values of $18.1 million and liability fair values of $79.9 million as of December 31, 2021. In comparison, included in the total notional amount of $9.09 billion of interest rate contracts entered into with financial counterparties as of December 31, 2020, was a notional amount of $2.98 billion of interest rate swaps that cleared through LCH. Applying variation margin payments as settlement to LCH cleared derivative transactions resulted in a reduction in derivative asset fair values of $1.3 million and liability fair values of $187.4 million as of December 31, 2020. Foreign Exchange Contracts — The Company enters into foreign exchange contracts with its customers, consisting of forwards, spot, swap and option contracts to accommodate the business needs of its customers. The Company enters into offsetting foreign exchange contracts with third-party financial institutions to manage its foreign exchange exposure with its customers, and entered into bilateral collateral and master netting agreements with certain customer counterparties to manage its credit exposure. The Company also utilizes foreign exchange contracts, which are not designated as hedging instruments to mitigate the economic effect of currency fluctuations on certain foreign currency-denominated on-balance sheet assets and liabilities, primarily for foreign currency-denominated deposits offered to its customers. A majority of the foreign exchange contracts had original maturities of one year or less as of both December 31, 2021 and 2020. The following tables present the notional amounts and the gross fair values of foreign exchange derivative contracts outstanding as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Forwards and spot $ 900,290 $ 13,688 $ 9,446 Forwards and spot $ 267,689 $ 1,564 $ 2,695 Swaps 66,474 1,034 17 Swaps 599,654 4,745 3,116 Written options 20,287 1 — Purchased options 20,287 1 2 Total $ 987,051 $ 14,723 $ 9,463 Total $ 887,630 $ 6,310 $ 5,813 ($ in thousands) December 31, 2020 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Forwards and spot $ 1,522,888 $ 17,575 $ 17,928 Forwards and spot $ 145,197 $ 1,230 $ 273 Swaps 13,590 872 91 Swaps 1,191,355 10,049 3,658 Written options 117,729 — 574 Purchased options 117,729 574 — Total $ 1,654,207 $ 18,447 $ 18,593 Total $ 1,454,281 $ 11,853 $ 3,931 Credit Contracts — The Company may periodically enter into credit RPAs with institutional counterparties to manage the credit exposure of the interest rate contracts associated with the syndicated loans. The Company may enter into protection sold or protection purchased RPAs. The purchaser of credit protection that enters into an interest rate contract with the borrower, may in turn enter into an RPA with a seller of protection, under which the seller of protection receives a fee to accept a portion of the credit risk. A seller of credit protection is required to make payments to the buyer if a borrower defaults on the related interest rate contract. Credit risk on RPAs is managed by monitoring the credit worthiness of the borrowers and institutional counterparties, which is part of the normal credit review and monitoring process. The majority of the reference entities of the protection sold RPAs were investment grade as of December 31, 2021, while all were investment grade as of December 31, 2020. Assuming the underlying borrowers referenced in the interest rate contracts defaulted as of December 31, 2021 and 2020, the maximum exposure of protection sold RPAs would be $3.2 million and $6.0 million for 2021 and 2020, respectively. As of December 31, 2021 and 2020, the weighted-average remaining maturities of the outstanding protection sold RPAs were 3.2 years and 3.5 years, respectively. The notional amount of the RPAs reflects the Company’s pro-rata share of the derivative instrument. The following table presents the notional amounts and the gross fair values of RPAs sold and purchased outstanding as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 December 31, 2020 Notional Amount Fair Value Notional Amount Fair Value Assets Liabilities Assets Liabilities RPAs - protection sold $ 72,560 $ — $ 141 $ 66,278 $ — $ 206 RPAs - protection purchased — — — 10,714 13 — Total RPAs $ 72,560 $ — $ 141 $ 76,992 $ 13 $ 206 Equity Contracts — From time to time, as part of the Company’s loan origination process, the Company obtains warrants to purchase preferred and/or common stock of technology and life sciences companies to which it provides loans. Warrants grant the Company the right to buy a certain class of the underlying company’s equity at a certain price before expiration. The Company held warrants in one public company and 12 private companies as of December 31, 2021, and held warrants in two public companies and 17 private companies as of December 31, 2020. The total fair value of the warrants held was $220 thousand and $858 thousand as of December 31, 2021 and 2020, respectively. Commodity Contracts — The Company enters into energy commodity contracts in the form of swaps and options with its commercial loan customers to allow them to hedge against the risk of energy commodity price fluctuation. To economically hedge against the risk of commodity price fluctuation in the products offered to its customers, the Company enters into offsetting commodity contracts with third-party financial institutions to manage the exposure. The following tables present the notional amounts and fair values of the commodity derivative positions outstanding as of December 31, 2021 and 2020. ($ and units in thousands) December 31, 2021 Customer Counterparty ($ and units in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Crude oil: Crude oil: Written options — Barrels $ 87 $ — Purchased options — Barrels $ — $ 81 Collars 2,837 Barrels 33,826 106 Collars 2,888 Barrels — 33,399 Swaps 4,682 Barrels 71,242 60 Swaps 7,517 Barrels 27,524 82,723 Total 7,519 $ 105,155 $ 166 Total 10,405 $ 27,524 $ 116,203 Natural gas: Natural gas: Collars 24,315 MMBTUs $ 10,903 $ 458 Collars 25,929 MMBTUs $ 1,136 $ 10,936 Swaps 58,959 MMBTUs 49,188 3,775 Swaps 109,567 MMBTUs 28,803 63,029 Total 83,274 $ 60,091 $ 4,233 Total 135,496 $ 29,939 $ 73,965 Total $ 165,246 $ 4,399 Total $ 57,463 $ 190,168 ($ and units in thousands) December 31, 2020 Customer Counterparty ($ and units in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Crude oil: Crude oil: Collars 2,022 Barrels $ 2,344 $ 2,193 Collars 2,022 Barrels $ 2,217 $ 2,402 Swaps 4,299 Barrels 9,282 14,283 Swaps 4,299 Barrels 8,220 7,135 Total 6,321 $ 11,626 $ 16,476 Total 6,321 $ 10,437 $ 9,537 Natural gas: Natural gas: Written options 597 MMBTUs $ — $ 59 Purchased options 597 MMBTUs $ 59 $ — Collars 12,733 MMBTUs 1,063 205 Collars 16,293 MMBTUs 205 813 Swaps 96,305 MMBTUs 32,073 27,238 Swaps 103,973 MMBTUs 26,988 29,837 Total 109,635 $ 33,136 $ 27,502 Total 120,863 $ 27,252 $ 30,650 Total $ 44,762 $ 43,978 Total $ 37,689 $ 40,187 As of December 31, 2021, the notional amounts that cleared through the Chicago Mercantile Exchange (“CME”), totaled 1,036 thousand barrels of crude oil and 11,490 thousand MMBTUs of natural gas. Applying the variation margin payments as settlement to CME-cleared derivative transactions resulted in reductions to the gross derivative asset fair value of $2.2 million and to the liability fair value of $25.8 million as of December 31, 2021. In comparison, the notional amounts that cleared through CME totaled 1,275 thousand barrels of crude oil and 29,733 thousand MMBTUs of natural gas as of December 31, 2020. Applying the variation margin payments as settlement to CME-cleared derivative transactions resulted in a reduction to the gross derivative asset fair value of $7.9 million and to the liability fair value of $3.7 million, respectively, as of December 31, 2020. The following table presents the net gains (losses) recognized on the Company’s Consolidated Statement of Income related to derivatives not designated as hedging instruments for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Classification on Year Ended December 31, 2021 2020 2019 Derivatives not designated as hedging instruments: Interest rate contracts Interest rate contracts and other derivative income $ 11,493 $ (8,637) $ (2,126) Foreign exchange contracts Foreign exchange income 45,921 23,215 22,264 Credit contracts Interest rate contracts and other derivative income 139 (5) 59 Equity contracts Lending fees 382 11,025 678 Commodity contracts Interest rate contracts and other derivative income (58) (35) (67) Net gains $ 57,877 $ 25,563 $ 20,808 Credit-Risk-Related Contingent Features — Certain of the Company’s over-the-counter derivative contracts contain early termination provisions that may require the Company to settle any outstanding balances upon the occurrence of a specified credit-risk-related event. Such event primarily relates to a downgrade in the credit rating of East West Bank to below investment grade. As of December 31, 2021, the aggregate fair value amounts of all derivative instruments with credit risk-related contingent features that were in a net liability position totaled $66.8 million, in which $66.6 million of collateral was posted to cover these positions. As of December 31, 2020, the aggregate fair value amounts of all derivative instruments with credit risk-related contingent features that were in a net liability position totaled $107.4 million, in which $106.8 million of collateral was posted to cover these positions. In the event that the credit rating of East West Bank had been downgraded to below investment grade, minimal additional collateral would have been required to be posted as of December 31, 2021 and 2020. Offsetting of Derivatives The following tables present the gross derivative fair values, the balance sheet netting adjustments and the resulting net fair values recorded on the consolidated balance sheet, as well as the cash and noncash collateral associated with master netting arrangements. The gross amounts of derivative assets and liabilities are presented after the application of variation margin payments as settlements with central counterparties, where applicable. The collateral amounts in the following tables are limited to the outstanding balances of the related asset or liability, after the application of netting; therefore instances of overcollateralization are not shown: ($ in thousands) As of December 31, 2021 Gross (1) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Received (3) Security Collateral Received (5) Derivative assets $ 484,184 $ (58,679) $ (42,274) $ 383,231 $ — $ 383,231 Gross (2) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Derivative liabilities $ 390,171 $ (58,679) $ (174,048) $ 157,444 $ (106,598) $ 50,846 ($ in thousands) As of December 31, 2020 Gross (1) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Received (3) Security Collateral (5) Derivative assets $ 602,754 $ (93,063) $ (8,449) $ 501,242 $ (35) $ 501,207 Gross (2) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Derivative liabilities $ 424,828 $ (93,063) $ (91,634) $ 240,131 $ (221,150) $ 18,981 (1) Included $587 thousand and $1.1 million of gross fair value assets with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2021 and 2020, respectively. (2) Included $666 thousand and $220 thousand of gross fair value liabilities with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2021 and 2020, respectively. (3) Gross cash collateral received under master netting arrangements or similar agreements were $47.0 million and $15.8 million as of December 31, 2021 and 2020, respectively. Of the gross cash collateral received, $42.3 million and $8.4 million were used to offset against derivative assets as of December 31, 2021 and 2020, respectively. (4) Gross cash collateral pledged under master netting arrangements or similar agreements were $176.5 million and $91.6 million as of December 31, 2021 and 2020, respectively. Of the gross cash collateral pledged, $174.0 million and $91.6 million were used to offset against derivative liabilities as of December 31, 2021 and 2020, respectively. (5) Represents the fair value of security collateral received and pledged limited to derivative assets and liabilities that are subject to enforceable master netting arrangements or similar agreements. U.S. GAAP does not permit the netting of noncash collateral on the consolidated balance sheet but requires disclosure of such amounts. In addition to the amounts included in the tables above, the Company also has balance sheet netting related to the resale and repurchase agreements. Refer to Note 3 — Assets Purchased under Resale Agreements and Sold under Repurchase Agreements to the Consolidated Financial Statements for additional information. Refer to Note 2 — Fair Value Measurement and Fair Value of Financial Instruments to the Consolidated Financial Statements in this Form 10-K for fair value measurement disclosures on derivatives.

Loans Receivable and Allowance

Loans Receivable and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Abstract]
Loans Receivable and Allowance for Credit Losses	Loans Receivable and Allowance for Credit Losses The following table presents the composition of the Company’s loans held-for-investment outstanding as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 December 31, 2020 Commercial: C&I (1) $ 14,150,608 $ 13,631,726 CRE: CRE 12,155,047 11,174,611 Multifamily residential 3,675,605 3,033,998 Construction and land 346,486 599,692 Total CRE 16,177,138 14,808,301 Total commercial 30,327,746 28,440,027 Consumer: Residential mortgage: Single-family residential 9,093,702 8,185,953 HELOCs 2,144,821 1,601,716 Total residential mortgage 11,238,523 9,787,669 Other consumer 127,512 163,259 Total consumer 11,366,035 9,950,928 Total loans held-for-investment (2) $ 41,693,781 $ 38,390,955 Allowance for loan losses (541,579) (619,983) Loans held-for-investment, net (2) $ 41,152,202 $ 37,770,972 (1) Includes PPP loans of $534.2 million and $1.57 billion as of December 31, 2021 and 2020, respectively. (2) Includes net deferred loan fees, unearned fees, unamortized premiums and unaccreted discounts of $(50.7) million and $(58.8) million as of December 31, 2021 and 2020, respectively. Net origination fees related to PPP loans were $(5.7) million and $(12.7) million as of December 31, 2021 and 2020, respectively. L oans held-for-investment accrued interest receivable was $107.4 million and $107.5 million as of December 31, 2021 and 2020, respectively, and is included in Other assets on the Consolidated Balance Sheet. For the Company’s accounting policy on accrued interest receivable related to loans held-for-investment, see Note 1 — Summary of Significant Accounting Policies — Loans Held-for-Investment to the Consolidated Financial Statements in this Form 10-K. The Company’s FRBSF and FHLB borrowings are primarily secured by loans held-for-investment. Loans held-for-investment totaling $27.67 billion and $23.26 billion, respectively, were pledged to secure borrowings and provide additional borrowing capacity as of December 31, 2021 and 2020. Credit Quality Indicators All loans are subject to the Company’s credit review and monitoring process. For the commercial loan portfolio, loans are risk rated based on an analysis of the borrower’s current payment performance or delinquency, repayment sources, financial and liquidity factors, including industry and geographic considerations. For a majority of the consumer loan portfolio, payment performance or delinquency is the driving indicator for the risk ratings. The Company utilizes internal credit risk ratings to assign each individual loan a risk rating of 1 through 10: • Pass — loans risk rated 1 through 5 are assigned an internal risk rating category of “Pass.” Loans risk rated 1 are typically loans fully secured by cash. Pass loans have sufficient sources of repayment to repay the loan in full, in accordance with all terms and conditions. • Special mention — loans assigned a risk rating of 6 have potential weaknesses that warrant closer attention by management; these are assigned an internal risk rating category of “Special Mention.” • Substandard — loans assigned a risk rating of 7 or 8 have well-defined weaknesses that may jeopardize the full and timely repayment of the loan; these are assigned an internal risk rating category of “Substandard.” • Doubtful — loans assigned a risk rating of 9 have insufficient sources of repayment and a high probability of loss; these are assigned an internal risk rating category of “Doubtful.” • Loss — loans assigned a risk rating of 10 are uncollectible and of such little value that they are no longer considered bankable assets; these are assigned an internal risk rating category of “Loss.” Loan exposures categorized as criticized consist of special mention, substandard, doubtful and loss categories. The Company reviews the internal risk ratings of its loan portfolio on a regular basis, and adjusts the ratings based on changes in the borrowers’ financial status and the collectability of the loans. The following tables summarize the Company’s loans held-for-investment by loan portfolio segments, internal risk ratings and vintage year as of December 31, 2021 and 2020. The vintage year is the year of origination, renewal or major modification. ($ in thousands) December 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Term Loans Amortized Cost Basis Total Amortized Cost Basis by Origination Year 2021 2020 2019 2018 2017 Prior Commercial: C&I: Pass $ 3,911,722 $ 1,133,085 $ 629,007 $ 187,195 $ 132,392 $ 225,326 $ 7,383,485 $ 28,842 $ 13,631,054 Criticized (accrual) 85,036 117,357 72,277 51,553 15,136 4,005 115,167 — 460,531 Criticized (nonaccrual) 29,456 2,792 513 517 9,301 16,444 — — 59,023 Total C&I 4,026,214 1,253,234 701,797 239,265 156,829 245,775 7,498,652 28,842 14,150,608 CRE: Pass 2,792,193 2,090,503 2,230,520 1,863,481 1,120,682 1,727,862 128,668 6,389 11,960,298 Criticized (accrual) 71,055 3,200 9,176 21,077 24,851 55,892 — — 185,251 Criticized (nonaccrual) 4,350 — — — 4,752 396 — — 9,498 Subtotal CRE 2,867,598 2,093,703 2,239,696 1,884,558 1,150,285 1,784,150 128,668 6,389 12,155,047 Multifamily residential: Pass 1,026,295 726,772 688,453 419,319 308,087 424,947 20,524 — 3,614,397 Criticized (accrual) — — 721 22,344 7,033 30,666 — — 60,764 Criticized (nonaccrual) — — — — — 444 — — 444 Subtotal multifamily residential 1,026,295 726,772 689,174 441,663 315,120 456,057 20,524 — 3,675,605 Construction and land: Pass 122,983 103,743 90,544 3,412 — 391 — — 321,073 Criticized (accrual) 3,355 — — 22,058 — — — — 25,413 Criticized (nonaccrual) — — — — — — — — — Subtotal construction and land 126,338 103,743 90,544 25,470 — 391 — — 346,486 Total CRE 4,020,231 2,924,218 3,019,414 2,351,691 1,465,405 2,240,598 149,192 6,389 16,177,138 Total commercial 8,046,445 4,177,452 3,721,211 2,590,956 1,622,234 2,486,373 7,647,844 35,231 30,327,746 Consumer: Single-family residential: Pass (1) 2,616,958 2,108,370 1,375,929 1,079,030 763,351 1,127,516 — — 9,071,154 Criticized (accrual) — — 458 2,813 1,899 3,212 — — 8,382 Criticized (Nonaccrual) (1) — — 1,751 3,889 4,295 4,231 — — 14,166 Subtotal single-family residential mortgage 2,616,958 2,108,370 1,378,138 1,085,732 769,545 1,134,959 — — 9,093,702 HELOCs: Pass 648 3,277 4,644 1,347 3,268 11,215 1,913,478 197,414 2,135,291 Criticized (accrual) — — — — — 371 7 708 1,086 Criticized (nonaccrual) — — 52 188 3,543 973 — 3,688 8,444 Subtotal HELOCs 648 3,277 4,696 1,535 6,811 12,559 1,913,485 201,810 2,144,821 Total residential mortgage 2,617,606 2,111,647 1,382,834 1,087,267 776,356 1,147,518 1,913,485 201,810 11,238,523 Other consumer: Pass 16,831 5,258 — — 1,741 52,147 51,481 — 127,458 Criticized (accrual) 2 — — — — — — — 2 Criticized (nonaccrual) — — — — — — 52 — 52 Subtotal other consumer 16,833 5,258 — — 1,741 52,147 51,533 — 127,512 Total consumer 2,634,439 2,116,905 1,382,834 1,087,267 778,097 1,199,665 1,965,018 201,810 11,366,035 Total $ 10,680,884 $ 6,294,357 $ 5,104,045 $ 3,678,223 $ 2,400,331 $ 3,686,038 $ 9,612,862 $ 237,041 $ 41,693,781 ($ in thousands) December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Term Loans Amortized Cost Basis Total Amortized Cost Basis by Origination Year 2020 2019 2018 2017 2016 Prior Commercial: C&I: Pass $ 3,912,147 $ 1,477,740 $ 483,725 $ 245,594 $ 69,482 $ 245,615 $ 6,431,003 $ 29,487 $ 12,894,793 Criticized (accrual) 120,183 74,601 56,785 19,426 1,487 5,872 324,640 — 602,994 Criticized (nonaccrual) 2,125 25,267 22,240 18,787 4,964 1,592 58,964 — 133,939 Total C&I 4,034,455 1,577,608 562,750 283,807 75,933 253,079 6,814,607 29,487 13,631,726 CRE: Pass 2,296,649 2,402,136 2,310,748 1,328,251 732,694 1,529,681 173,267 19,064 10,792,490 Criticized (accrual) 47,459 63,654 43,447 98,259 2,094 80,662 — — 335,575 Criticized (nonaccrual) — — 42,067 1,115 — 3,364 — — 46,546 Subtotal CRE 2,344,108 2,465,790 2,396,262 1,427,625 734,788 1,613,707 173,267 19,064 11,174,611 Multifamily residential: Pass 783,671 783,589 479,959 411,945 181,213 348,751 5,895 — 2,995,023 Criticized (accrual) — 735 22,330 6,101 264 5,877 — — 35,307 Criticized (nonaccrual) — — 1,475 — — 2,193 — — 3,668 Subtotal multifamily residential 783,671 784,324 503,764 418,046 181,477 356,821 5,895 — 3,033,998 Construction and land: Pass 224,924 172,707 156,712 — 20,897 1,028 — — 576,268 Criticized (accrual) 3,524 — — — — 19,900 — — 23,424 Criticized (nonaccrual) — — — — — — — — — Subtotal construction and land 228,448 172,707 156,712 — 20,897 20,928 — — 599,692 Total CRE 3,356,227 3,422,821 3,056,738 1,845,671 937,162 1,991,456 179,162 19,064 14,808,301 Total commercial 7,390,682 5,000,429 3,619,488 2,129,478 1,013,095 2,244,535 6,993,769 48,551 28,440,027 Consumer: Single-family residential: Pass (1) 2,385,853 1,813,200 1,501,660 1,021,707 523,170 921,714 — — 8,167,304 Criticized (accrual) — 1,429 — — 119 1,034 — — 2,582 Criticized (nonaccrual) (1) — 226 812 1,789 1,994 11,246 — — 16,067 Subtotal single-family residential mortgage 2,385,853 1,814,855 1,502,472 1,023,496 525,283 933,994 — — 8,185,953 HELOCs: Pass 1,131 880 2,879 5,363 8,433 13,475 1,328,919 225,810 1,586,890 Criticized (accrual) — — 200 — 996 — 1,328 606 3,130 Criticized (nonaccrual) — 151 285 4,617 164 1,962 — 4,517 11,696 Subtotal HELOCs 1,131 1,031 3,364 9,980 9,593 15,437 1,330,247 230,933 1,601,716 Total residential mortgage 2,386,984 1,815,886 1,505,836 1,033,476 534,876 949,431 1,330,247 230,933 9,787,669 Other consumer: Pass 9,531 — — 1,830 — 83,255 66,136 — 160,752 Criticized (accrual) 16 — — — — — — — 16 Criticized (nonaccrual) — — — 2,491 — — — — 2,491 Subtotal other consumer 9,547 — — 4,321 — 83,255 66,136 — 163,259 Total consumer 2,396,531 1,815,886 1,505,836 1,037,797 534,876 1,032,686 1,396,383 230,933 9,950,928 Total $ 9,787,213 $ 6,816,315 $ 5,125,324 $ 3,167,275 $ 1,547,971 $ 3,277,221 $ 8,390,152 $ 279,484 $ 38,390,955 (1) As of December 31, 2021 and 2020, $1.6 million and $747 thousand, respectively, of nonaccrual loans whose payments are guaranteed by the Federal Housing Administration were classified with a “Pass” rating. Revolving loans that are converted to term loans presented in the table above are excluded from the term loans by vintage year columns. During the years ended December 31, 2021 and 2020, HELOCs totaling $54.1 million and $145.0 million, respectively, were converted to term loans. During the year ended December 31, 2021, one C&I revolving loan totaling $78 thousand and three CRE revolving loans totaling $6.4 million were converted to term loans. In comparison, four C&I revolving loans totaling $23.9 million were converted to term loans during the year ended December 31, 2020. Nonaccrual and Past Due Loans Loans that are 90 or more days past due are generally placed on nonaccrual status, unless the loan is well-collateralized and in the process of collection. Loans that are less than 90 days past due but have identified deficiencies, such as when the full collection of principal or interest becomes uncertain, are also placed on nonaccrual status. Payment deferral activities instituted in response to the COVID-19 pandemic could delay the recognition of delinquencies for customers who otherwise would have moved into nonaccrual status. The following tables present the aging analysis of total loans held-for-investment as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Current Accruing Accruing Total Total Total Commercial: C&I $ 14,080,516 $ 6,983 $ 4,086 $ 11,069 $ 59,023 $ 14,150,608 CRE: CRE 12,141,827 3,722 — 3,722 9,498 12,155,047 Multifamily residential 3,669,819 5,320 22 5,342 444 3,675,605 Construction and land 346,486 — — — — 346,486 Total CRE 16,158,132 9,042 22 9,064 9,942 16,177,138 Total commercial 30,238,648 16,025 4,108 20,133 68,965 30,327,746 Consumer: Residential mortgage: Single-family residential 9,059,222 10,191 8,569 18,760 15,720 9,093,702 HELOCs 2,130,523 4,776 1,078 5,854 8,444 2,144,821 Total residential mortgage 11,189,745 14,967 9,647 24,614 24,164 11,238,523 Other consumer 127,352 99 9 108 52 127,512 Total consumer 11,317,097 15,066 9,656 24,722 24,216 11,366,035 Total $ 41,555,745 $ 31,091 $ 13,764 $ 44,855 $ 93,181 $ 41,693,781 ($ in thousands) December 31, 2020 Current Accruing Loans (1) Accruing Accruing Total Total Total Commercial: C&I $ 13,488,070 $ 8,993 $ 724 $ 9,717 $ 133,939 $ 13,631,726 CRE: CRE 11,127,690 375 — 375 46,546 11,174,611 Multifamily residential 3,028,512 1,818 — 1,818 3,668 3,033,998 Construction and land 579,792 19,900 — 19,900 — 599,692 Total CRE 14,735,994 22,093 — 22,093 50,214 14,808,301 Total commercial 28,224,064 31,086 724 31,810 184,153 28,440,027 Consumer: Residential mortgage: Single-family residential 8,156,645 9,911 2,583 12,494 16,814 8,185,953 HELOCs 1,583,968 2,922 3,130 6,052 11,696 1,601,716 Total residential mortgage 9,740,613 12,833 5,713 18,546 28,510 9,787,669 Other consumer 160,534 217 17 234 2,491 163,259 Total consumer 9,901,147 13,050 5,730 18,780 31,001 9,950,928 Total $ 38,125,211 $ 44,136 $ 6,454 $ 50,590 $ 215,154 $ 38,390,955 (1) As of both December 31, 2021 and 2020, loans in payment deferral programs offered in response to the COVID-19 pandemic that are performing according to their modified terms are generally not considered delinquent, and are included in the “Current Accruing Loans” column. The following table presents amortized cost of loans on nonaccrual status for which there was no related allowance for loan losses as of both December 31, 2021 and 2020. Nonaccrual loans may not have an allowance for credit losses if there is no loss expectation since the loan balances are well secured by the collateral value. ($ in thousands) December 31, 2021 December 31, 2020 Commercial: C&I $ 22,967 $ 62,040 CRE: CRE 9,102 45,537 Multifamily residential — 2,519 Total CRE 9,102 48,056 Total commercial 32,069 110,096 Consumer: Residential mortgage: Single-family residential 5,785 6,013 HELOCs 5,033 8,076 Total residential mortgage 10,818 14,089 Other consumer — 2,491 Total consumer 10,818 16,580 Total nonaccrual loans with no related allowance for loan losses $ 42,887 $ 126,676 Foreclosed Assets The Company acquires assets from borrowers through loan restructurings, workouts, and foreclosures. Assets acquired may include real properties (e.g., residential real estate, land, and buildings) and commercial and personal properties. The Company recognizes foreclosed assets upon receiving assets in satisfaction of a loan (e.g., taking legal title or physical possession). Foreclosed assets, consisting of OREO and other nonperforming assets, are included in Other assets on the Consolidated Balance Sheet. The Company had $10.3 million in foreclosed assets as of December 31, 2021, compared with $19.7 million as of December 31, 2020. The Company commences the foreclosure process on consumer mortgage loans after a borrower becomes more than 120 days delinquent in accordance with the Consumer Financial Protection Bureau guidelines. The carrying values of consumer real estate loans that were in the process of active or suspended foreclosure were $7.3 million and $4.1 million as of December 31, 2021 and 2020, respectively. In response to the COVID-19 pandemic, the Company has suspended certain mortgage foreclosure activities in connection with its actions to support its customers throughout 2021 and 2020. In addition, certain other foreclosures are awaiting for the end of government-mandated foreclosure moratoriums in certain states. Troubled Debt Restructurings TDRs are individually evaluated, and the type of restructuring is selected based on the loan type and the circumstances of the borrower’s financial difficulties. A TDR is a modification of the terms of a loan when the Company, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower that it would not have otherwise considered. Beginning in March 2020, the Company has implemented various commercial and consumer loan modification programs to provide its borrowers relief from the economic impacts of the COVID-19 pandemic. These COVID-related modifications are generally not classified as TDRs due to the relief under the CARES Act and the Interagency Statement, and therefore are not included in the discussion below. Assistance provided in response to the COVID-19 pandemic could delay the recognition of delinquencies, nonaccrual status, and net charge-offs for those borrowers who would have otherwise moved into past due or nonaccrual status. See Note 1 — Summary of Significant Accounting Policies — Troubled Debt Restructurings to the Consolidated Financial Statements in this Form 10-K for additional information related to TDR. The following tables present the additions to TDRs for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Loans Modified as TDRs During the Year Ended December 31, 2021 Number Pre-Modification Post-Modification (1) Financial (2) Commercial: C&I 5 $ 24,155 $ 20,263 $ 1,108 CRE: Multifamily residential 1 1,101 1,066 — Total CRE 1 1,101 1,066 — Total commercial 6 25,256 21,329 1,108 Total 6 $ 25,256 $ 21,329 $ 1,108 ($ in thousands) Loans Modified as TDRs During the Year Ended December 31, 2020 Number Pre-Modification Post-Modification (1) Financial (2) Commercial: C&I 14 $ 152,249 $ 134,467 $ 19,555 CRE: CRE 2 21,429 21,221 18 Multifamily residential 1 1,220 1,226 — Total CRE 3 22,649 22,447 18 Total commercial 17 174,898 156,914 19,573 Total 17 $ 174,898 $ 156,914 $ 19,573 ($ in thousands) Loans Modified as TDRs During the Year Ended December 31, 2019 Number Pre-Modification Post-Modification (1) Financial (2) Commercial: C&I 8 $ 95,742 $ 71,332 $ 8,004 CRE: Construction and land 1 19,696 19,691 — Total CRE 1 19,696 19,691 — Total commercial 9 115,438 91,023 8,004 Consumer: Residential mortgage: Single-family residential 2 1,123 1,098 2 HELOCs 2 539 528 — Total residential mortgage 4 1,662 1,626 2 Total consumer 4 1,662 1,626 2 Total 13 $ 117,100 $ 92,649 $ 8,006 (1) Includes subsequent payments after modification and reflects the balance as of December 31, 2021, 2020 and 2019. (2) Includes charge-offs and specific reserves recorded since the modification date. The following tables present the TDR post-modifications outstanding balances for the years ended December 31, 2021, 2020 and 2019 by modification type: ($ in thousands) Modification Type During the Year Ended December 31, 2021 Principal (1) Principal and Interest (2) Interest Interest Other (3) Total Commercial: C&I $ 4,679 $ — $ 15,584 $ — $ — $ 20,263 CRE: CRE — — — — — — Multifamily residential 1,066 — — — — 1,066 Total CRE 1,066 — — — — 1,066 Total commercial 5,745 — 15,584 — — 21,329 Total $ 5,745 $ — $ 15,584 $ — $ — $ 21,329 ($ in thousands) Modification Type During the Year Ended December 31, 2020 Principal (1) Principal and Interest (2) Interest Interest Other (3) Total Commercial: C&I $ 59,134 $ 10,863 $ 31,913 $ 32,557 $ — $ 134,467 CRE: CRE 21,221 — — — — 21,221 Multifamily residential 1,226 — — — — 1,226 Total CRE 22,447 — — — — 22,447 Total commercial 81,581 10,863 31,913 32,557 — 156,914 Total $ 81,581 $ 10,863 $ 31,913 $ 32,557 $ — $ 156,914 ($ in thousands) Modification Type During the Year Ended December 31, 2019 Principal (1) Principal (2) Interest Interest Other (3) Total Commercial: C&I $ 31,611 $ — $ — $ — $ 39,721 $ 71,332 CRE: Construction and land — — 19,691 — — 19,691 Total CRE — — 19,691 — — 19,691 Total commercial 31,611 — 19,691 — 39,721 91,023 Consumer: Residential mortgage: Single-family residential — 1,098 — — — 1,098 HELOCs — 397 — — 131 528 Total residential mortgage — 1,495 — — 131 1,626 Total consumer — 1,495 — — 131 1,626 Total $ 31,611 $ 1,495 $ 19,691 $ — $ 39,852 $ 92,649 (1) 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) Includes principal and interest deferments or reductions. (3) Includes primarily funding to secure additional collateral and provides liquidity to collateral-dependent C&I loans. After a loan is modified as a TDR, the Company continues to monitor its performance under its most recent restructured terms. A TDR may become delinquent and result in payment default (generally 90 days past due) subsequent to restructuring. The following table presents the information on loans that entered into payment default during the years ended December 31, 2021, 2020 and 2019 that were modified as TDRs during the 12 months preceding payment default: ($ in thousands) Loans Modified as TDRs that Subsequently Defaulted 2021 2020 2019 Number of Recorded Number of Recorded Number of Recorded Commercial: C&I 1 $ 11,431 1 $ 15,852 3 $ 13,112 Total commercial 1 11,431 1 15,852 3 13,112 Total 1 $ 11,431 1 $ 15,852 3 $ 13,112 As of December 31, 2021 and 2020, the remaining commitments to lend additional funds to borrowers whose terms of their outstanding owed balances were modified as TDRs were $5.0 million and $3.0 million, respectively. Allowance for Credit Losses The Company has an allowance framework under ASU 2016-13 for all financial assets measured at amortized cost and certain off-balance sheet credit exposures. The Company’s allowance for credit losses, which includes both the allowance for loan losses and the allowance for unfunded credit commitments, is calculated with the objective of maintaining a reserve sufficient to absorb losses inherent in our credit portfolios. The measurement of the allowance for credit losses is based on management’s best estimate of lifetime expected credit losses, and periodic evaluation of the loan portfolio, lending-related commitments and other relevant factors. The allowance for credit losses is deducted from the amortized cost basis of a financial asset or a group of financial assets so that the balance sheet reflects the net amount the Company expects to collect. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts, deferred fees and costs, and escrow advances. Subsequent changes in expected credit losses are recognized in net income as a provision for, or a reversal of, credit loss expense. The allowance for credit losses estimation involves procedures to consider the unique risk characteristics of the portfolio segments. The majority of the Company’s credit exposures share risk characteristics with other similar exposures and are collectively evaluated. The collectively evaluated loans cover performing risk-rated loans and unfunded credit commitments. If an exposure does not share risk characteristics with other exposures, the Company generally estimates expected credit losses on an individual basis. These individually assessed loans include TDR and nonaccrual loans. Allowance for Collectively Evaluated Loans The allowance for collectively evaluated loans consists of a quantitative component that assesses the different risk factors considered in our models and a qualitative component that considers risk factors external to the models. Each of these components are described below. • Quantitative Component — The Company applies quantitative methods to estimate loan losses by considering a variety of factors such as historical loss experience, the current credit quality of the portfolio, and an economic outlook over the life of the loan. The Company incorporates forward-looking information using macroeconomic scenarios which include variables that are considered key drivers of increases and decreases in credit losses. The Company utilizes a probability-weighted, multiple-scenario forecast approach. These scenarios may consist of a base forecast representing management's view of the most likely outcome, combined with downside or upside scenarios reflecting possible worsening or improving economic conditions. The quantitative models incorporate a probability-weighted calculation of these macroeconomic scenarios over a reasonable and supportable forecast period. If the life of the loans extends beyond the reasonable and supportable forecast period, the Company will consider historical experience or long-run macroeconomic trends over the remaining lives of the loans to estimate the allowance for loan losses. For the year ended December 31, 2021, the reasonable and supportable forecast period, key credit risk characteristics and macroeconomic variables to estimate the expected credit losses of the C&I segment were modified due to model enhancement. There were no changes to the overall model methodology. For the year ended December 31, 2020, there were no changes to the reasonable and supportable forecast period, and reversion to historical loss experience method. The following table provides key credit risk characteristics and macroeconomic variables that the Company uses to estimate the expected credit losses by portfolio segment: Portfolio Segment Risk Characteristics Macroeconomic Variables C&I Age (1) , size and spread at origination, and risk rating Volatility Index (“VIX”) and BBB yield to 10-year U.S. Treasury spread (“BBB Spread”) (1) CRE, Multifamily residential, and Construction and land Delinquency status, maturity date, collateral value, property type, and geographic location Unemployment rate, Gross Domestic Product (“GDP”), and U.S. Treasury rates Single-family residential and HELOCs FICO score, delinquency status, maturity date, collateral value, and geographic location Unemployment rate, GDP, and home price index Other consumer Historical loss experience Immaterial (2) (1) Due to model enhancements, the risk characteristic related to “time-to-maturity” was changed to “age”; while macroeconomic variables related to “unemployment rate and two- and ten-year U.S. Treasury spread” were changed to “VIX and BBB Spread” during the year ended December 31, 2021. (2) Macroeconomic variables are included in the qualitative estimate. Allowance for Loan Losses for the Commercial Loan Portfolio The Company’s C&I lifetime loss rate model estimates credit losses by estimating a loss rate expected over the life of a loan. This loss rate is applied to the amortized cost basis, excluding accrued interest receivable, to determine expected credit losses. The lifetime loss rate model’s reasonable and supportable period spans 11 quarters, thereafter immediately reverting to the historical average loss rate, expressed through the loan-level lifetime loss rate. For CRE, multifamily residential, and construction and land loans, projected probability of defaults (“PDs”) and loss given defaults (“LGDs”) are applied to the estimated exposure at default, considering the term and payment structure of the loan, to generate estimates of expected loss at the loan level. The forecast of future economic conditions returns to long-run historical economic trends within the reasonable and supportable period. In order to estimate the life of a loan under both models, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. Allowance for Loan Losses for the Consumer Loan Portfolio For single-family residential and HELOC loans, projected PDs and LGDs are applied to the estimated exposure at default, considering the term and payment structure of the loan, to generate estimates of expected loss at the loan level. The forecast of future economic conditions returns to long-run historical economic trends after the reasonable and supportable period. In order to estimate the life of a loan for the single-family residential and HELOC portfolios, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. For other consumer loans, the Company uses a loss rate approach. • Qualitative Component — The Company also considers the following qualitative factors in the determination of the collectively evaluated allowance, if these factors have not already been captured by the quantitative model. Such qualitative factors may include, but are not limited to: – Loan growth trends; – The volume and severity of past due financial assets, and the volume and severity of adversely classified financial assets; – The Company’s lending policies and procedures, including changes in lending strategies, underwriting standards, collection, write-off and recovery practices; – Knowledge of a borrower’s operations; – The quality of the Company’s credit review system; – The experience, ability and depth of the Company’s management, lending associates and other relevant associates; – The effect of other external factors such as the regulatory and legal environments and changes in technology; – Actual and expected changes in international, national, regional, and local economic and business conditions in which the Company operates; and – Risk factors in certain industry sectors not captured by the quantitative models. The magnitude of the impact of these factors on the Company’s qualitative assessment of the allowance for credit losses changes from period to period according to changes made by management in its assessment of these factors. The extent to which these factors change may be dependent on whether they are already reflected in quantitative loss estimates during the current period and the extent to which changes in these factors diverge from period to period. While the Company’s allowance methodologies strive to reflect all relevant credit risk factors, there continues to be uncertainty associated with, but not limited to, potential imprecision in the estimation process due to the inherent time lag of obtaining information and normal variations between expected and actual outcomes. The Company may hold additional qualitative reserves that are designed to provide coverage for losses attributable to such risk. Allowance for Individually Evaluated Loans When a loan no longer shares similar risk characteristics with other loans, such as in the case of certain nonaccrual or TDR loans, the Company estimates the allowance for loan losses on an individual loan basis. The allowance for loan losses for individually evaluated loans is measured as the difference between the recorded value of the loans and their fair value. For loans evaluated individually, the Company uses one of three different asset valuation measurement methods: (1) the fair value of collateral less costs to sell; (2) the present value of expected future cash flows; or (3) the loan's observable market price. If an individually evaluated loan is determined to be collateral dependent, the Company applies the fair value of the collateral less costs to sell method. If an individually evaluated loan is determined not to be collateral dependent, the Company uses the present value of future cash flows or the observable market value of the loan. • Collateral-Dependent Loans — The allowance of a collateral-dependent loan is limited to the difference between the recorded value and fair value of the collateral less cost of disposal or sale. As of December 31, 2021, collateral-dependent commercial and consumer loans totaled $37.0 million and $14.0 million, respectively. In comparison, collateral-dependent commercial and consumer loans totaled $97.2 million and $17.3 million as of December 31, 2020, respectively. The Company's commercial collateral-dependent loans were secured by real estate or other collateral. The Company's consumer collateral-dependent loans were all residential mortgage loans, secured by the underlying real estate. As of both December 31, 2021 and 2020 , the collateral value of the properties securing the collateral dependent loans, net of selling costs, exceeded the recorded value of the loans. The following tables summarize the activity in the allowance for loan losses by portfolio segments for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 Commercial Consumer Total C&I CRE Residential Mortgage Other CRE Multifamily Construction Single- HELOCs Allowance for loan losses, beginning of period $ 398,040 $ 163,791 $ 27,573 $ 10,239 $ 15,520 $ 2,690 $ 2,130 $ 619,983 (Reversal of ) provision for credit losses on loans (a) (39,715) 14,282 (15,076) 7,576 1,965 745 1,286 (28,937) Gross charge-offs (32,490) (28,430) (130) (2,954) (1,046) (45) (1,497) (66,592) Gross recoveries 11,906 1,297 2,033 607 721 45 5 16,614 Total net (charge-offs) recoveries (20,584) (27,133) 1,903 (2,347) (325) — (1,492) (49,978) Foreign currency translation adjustment 511 — — — — — — 511 Allowance for loan losses, end of period $ 338,252 $ 150,940 $ 14,400 $ 15,468 $ 17,160 $ 3,435 $ 1,924 $ 541,579 ($ in thousands) Year Ended December 31, 2020 Commercial Consumer Total C&I CRE Residen

Investments in Qualified Afford

Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities	12 Months Ended
	Dec. 31, 2021
Investments in Qualified Affordable Housing Partnerships, Net [Abstract]
Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities	Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities The CRA encourages banks to meet the credit needs of their communities, particularly including low- and moderate-income individuals and neighborhoods. The Company invests in certain affordable housing projects in the form of ownership interests in limited partnerships or limited liability companies that qualify for CRA and tax credits. These entities are formed to develop and operate apartment complexes designed as high-quality affordable housing for lower income tenants throughout the U.S. To fully utilize the available tax credits, each of these entities must meet the regulatory affordable housing requirements for a minimum 15-year compliance period. In addition to affordable housing projects, the Company also invests in New Market Tax Credit projects that qualify for CRA credits, as well as projects that qualify for renewable energy and historic tax credits. New Market Tax Credit investments provide capital through Community Development Entities to promote community development and economic growth. Investments in renewable energy tax credits help to promote the development of renewable energy sources, and 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 using the proportional amortization method if the investments meet certain criteria. 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 Income tax expense on the Consolidated Statement of Income. The following table presents the Company’s investments in qualified affordable housing partnerships, net, and related unfunded commitments as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Investments in qualified affordable housing partnerships, net $ 289,741 $ 213,555 Accrued expenses and other liabilities — Unfunded commitments $ 146,152 $ 77,444 The following table presents additional information related to the Company’s investments in qualified affordable housing partnerships, net, for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Tax credits and other tax benefits recognized $ 50,591 $ 45,971 $ 46,034 Amortization expense included in income tax expense $ 33,248 $ 37,132 $ 36,561 Investments in Tax Credit and Other Investments, Net Depending on the ownership percentage and the influence the Company has on the investments in tax credit and other investments, the Company applies the equity or cost method of accounting, or the measurement alternative as elected under ASU 2016-01 for equity investments without readily determinable fair value. The following table presents the Company’s investments in tax credit and other investments, net, and related unfunded commitments as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Investments in tax credit and other investments, net $ 338,522 $ 266,525 Accrued expenses and other liabilities — Unfunded commitments $ 163,464 $ 105,282 The following table presents additional information related to the Company’s investments in tax credit and other investments, net, for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Amortization of tax credit and other investments $ 122,457 $ 70,082 $ 98,383 The Company held equity securities that are mutual funds with readily determinable fair values of $26.6 million and $31.3 million, as of December 31, 2021 and 2020, respectively. The Company invested in these mutual funds for CRA purposes. These equity securities were measured at fair value with changes in fair value recorded in net income. The Company recorded unrealized losses on these equity securities of $746 thousand for the year ended December 31, 2021, compared with unrealized gains of $732 thousand for the year ended December 31, 2020. Equity securities with readily determinable fair value were included in Investments in tax credit and other investments, net on the Consolidated Balance Sheet. The Company held equity securities without readily determinable fair values totaling $33.1 million and $23.7 million as of December 31, 2021 and 2020, respectively, which were measured using the measurement alternative at cost less impairment and adjusted for observable price changes. For the year ended December 31, 2021, the Company recorded no OTTI charges, compared with $360 thousand OTTI charges recorded for the year ended December 31, 2020 related to these securities. Equity securities without readily determinable fair values were included in Investments in tax credit and other investments, net and Other Assets on the Consolidated Balance Sheet. As of December 31, 2021, the Company’s unfunded commitments related to investments in qualified affordable housing partnerships, tax credit and other investments are estimated to be funded as follows: ($ in thousands) Amount 2022 $ 174,475 2023 109,622 2024 5,751 2025 14,847 2026 978 Thereafter 3,943 Total $ 309,616 Tax credit and other investments are evaluated for possible OTTI on an annual basis or when events or changes in circumstances suggest that the carrying amount of the tax credit investments may not be realizable. OTTI charges and impairment recoveries are recorded within Amortization of tax credit and other investments on the Consolidated Statement of Income. Refer to Note 2 — Fair Value Measurement and Fair Value of Financial Instruments to the Consolidated Financial Statements in this Form 10-K for a discussion on the Company’s impairment evaluation and monitoring process of tax credit investments. During the year ended December 31, 2021, there were no OTTI charges and $1.3 million OTTI recoveries were recorded related to the Company’s investments in tax credits and other investments, net. Comparatively, there were $4.8 million in OTTI charges, offset by OTTI recoveries of $1.5 million, during the year ended December 31, 2020; and $14.6 million in OTTI charges, offset by $1.6 million in recoveries recorded during the year ended December 31, 2019. Variable Interest Entities The Company invests in unconsolidated limited partnerships and similar entities that construct, own and operate affordable housing, historic rehabilitation, wind and solar projects, of which the majority of such investments are VIEs. As a limited partner in these partnerships, these investments are designed to generate a return primarily through the realization of federal tax credits and tax benefits. An unrelated third party is typically the general partner or managing member who has control over the significant activities of such investments. While the Company’s interest in some of the investments may exceed 50% of the outstanding equity interests, the Company does not consolidate these structures due to the general partner or managing member’s ability to manage the entity, which is indicative of power over them. The Company’s expected maximum exposure to loss in connection with these partnerships consist of the unamortized investment balance and any tax credits claimed that may be subject to recapture. Special purpose entities formed in connection with securitization transactions are generally considered VIEs. A CLO is a VIE that manages a pool of assets consisting primarily of broadly syndicated corporate loans, where multiple tranches of notes are issued to investors . The Company served as the collateral manager of a CLO that closed in 2019 and subsequently sold its portfolio management contract in 2020 but retained the top three investment grade-rated tranches, which had a carrying amount of $291.7 million and $287.5 million as of December 31, 2021 and 2020 , respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Total goodwill was $465.7 million as of both December 31, 2021 and 2020. The Company’s annual goodwill impairment testing is performed as of December 31 of each year, or more frequently as events occur or circumstances change that would more-likely-than-not reduce the fair value of a reporting unit below its carrying value. Additional information pertaining to the Company’s accounting policy for goodwill is summarized in Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Goodwill and Other Intangible Assets . The Company completed its annual goodwill impairment testing and additionally reviewed the macroeconomic conditions, including the impacts of the ongoing COVID-19 pandemic on its business performance and market capitalization, and concluded that goodwill was not impaired as of December 31, 2021. Core Deposit Intangibles The following table presents the gross carrying amount and accumulated amortization of core deposits intangible assets as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Gross balance (1) $ 86,099 $ 86,099 Accumulated amortization (1) (82,471) (79,722) Net carrying balance (1) $ 3,628 $ 6,377 (1) Excludes fully amortized core deposit intangible assets. There were no impairment write-downs on core deposit intangibles for the years ended December 31, 2021, 2020 and 2019. Amortization Expense The Company amortizes the core deposit intangibles based on the projected useful lives of the related deposits. The amortization expense related to the core deposit intangible assets was $2.7 million, $3.6 million and $4.5 million for the years ended December 31, 2021, 2020 and 2019, respectively. The following table presents the estimated future amortization expense of core deposit intangibles as of December 31, 2021: ($ in thousands) Amount 2022 $ 1,865 2023 1,199 2024 553 2025 11 Total $ 3,628

Deposits

Deposits	12 Months Ended
	Dec. 31, 2021
DEPOSIT ACCOUNTS
Deposits	Deposits The following table presents the composition of the Company’s deposits as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Deposits: Noninterest-bearing demand $ 22,845,464 $ 16,298,301 Interest-bearing checking 6,524,721 6,142,193 Money market 13,130,300 10,740,667 Savings 2,888,065 2,681,242 Time deposits (1) : Domestic office 6,940,013 8,159,641 Foreign office 1,021,969 840,708 Total deposits $ 53,350,532 $ 44,862,752 (1) The aggregate amount of time deposits that met or exceeded the deposit insurance limit was $5.95 billion and $6.62 billion as of December 31, 2021 and 2020, respectively. The following table presents the scheduled maturities of time deposits for the five years succeeding December 31, 2021 and thereafter: ($ in thousands) Amount 2022 $ 7,605,509 2023 285,518 2024 57,727 2025 6,545 2026 6,668 Thereafter 15 Total $ 7,961,982

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances and Long-Term Debt	12 Months Ended
	Dec. 31, 2021
FEDERAL HOME LOAN BANK ADVANCES AND LONG-TERM DEBT
Federal Home Loan Bank Advances and Long-Term Debt	Federal Home Loan Bank Advances and Long-Term Debt The following table presents the balance of the Company’s junior subordinated debt and FHLB advances as of December 31, 2021 and 2020, and the related contractual rates and maturity dates as of December 31, 2021: ($ in thousands) Interest Rate Maturity Dates December 31, 2021 2020 Amount Amount Parent Company Junior subordinated debt (1 ) — floating (2) 1.55% — 2.10% 2034 — 2037 $ 147,658 $ 147,376 Bank FHLB advances (3) : Fixed 0.00% — 2.34% 2021 — 405,000 Floating (2) 0.53% — 0.59% 2022 249,331 247,612 Total FHLB advances $ 249,331 $ 652,612 (1) The weighted-average contractual interest rates for junior subordinated debt were 1.74% and 2.26% as of December 31, 2021 and 2020, respectively. (2) Floating interest rates reset monthly or quarterly based on LIBOR. (3) The weighted-average contractual interest rates for FHLB advances were 1.17% and 1.77% as of December 31, 2021 and 2020, respectively. FHLB Advances The Bank’s available borrowing capacity from FHLB advances totaled $11.93 billion and $6.33 billion as of December 31, 2021 and 2020, respectively. The Bank’s available borrowing capacity from the FHLB is derived from its portfolio of loans that are pledged to the FHLB reduced by its outstanding FHLB advances. As of December 31, 2021 and 2020, all advances were secured by real estate loans. Long-Term Debt — Junior Subordinated Debt As of December 31, 2021, East West has six statutory business trusts for the purpose of issuing junior subordinated debt to third party investors. The junior subordinated debt was issued in connection with the East West’s various pooled trust preferred securities offerings. The Trusts issued variable rate capital securities, representing undivided preferred beneficial interests in the assets of the Trusts, to third party investors. East West is the owner of all the beneficial interests represented by the common securities of the Trusts. The junior subordinated debt is recorded as a component of long-term debt and includes the value of the common stock issued by six of East West’s wholly owned subsidiaries in conjunction with these transactions. The common stock is recorded in Other assets on the Consolidated Balance Sheet for the amount issued in connection with these junior subordinated debt issuances. The proceeds from these issuances represent liabilities of East West to the Trusts and are reported as a component of L o ng-term debt on the Consolidated Balance Sheet. Interest payments on these securities are made quarterly and are deductible for tax purposes. The following table presents the outstanding junior subordinated debt issued by each trust as of December 31, 2021, and 2020: Issuer Stated (1) Stated Current Rate December 31, 2021 December 31, 2020 Aggregate Aggregate Aggregate Aggregate ($ in thousands) East West Capital Trust V November 2034 3-month LIBOR + 1.80% 1.96% $ 464 $ 15,000 $ 464 $ 15,000 East West Capital Trust VI September 2035 3-month LIBOR + 1.50% 1.70% 619 20,000 619 20,000 East West Capital Trust VII June 2036 3-month LIBOR + 1.35% 1.55% 928 30,000 928 30,000 East West Capital Trust VIII June 2037 3-month LIBOR + 1.40% 1.58% 619 18,000 619 18,000 East West Capital Trust IX September 2037 3-month LIBOR + 1.90% 2.10% 928 30,000 928 30,000 MCBI Statutory Trust I December 2035 3-month LIBOR + 1.55% 1.75% 1,083 35,000 1,083 35,000 Total $ 4,641 $ 148,000 $ 4,641 $ 148,000 (1) All the above debt instruments mature in more than five years after December 31, 2021 and are subject to call options where early redemption requires appropriate notice.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table presents the components of income tax expense (benefit) for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Current income tax expense (benefit): Federal $ 84,249 $ 84,560 $ 107,393 State 95,939 74,252 86,578 Foreign (1,554) 671 (2,485) Total current income tax expense 178,634 159,483 191,486 Deferred income tax expense (benefit): Federal 1,528 (28,093) (8,801) State 3,259 (11,671) (16,390) Foreign (25) (1,751) 3,587 Total deferred income tax expense (benefit) 4,762 (41,515) (21,604) Income tax expense $ 183,396 $ 117,968 $ 169,882 The following table presents the reconciliation of the federal statutory rate to the Company’s effective tax rate for the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 Statutory U.S. federal tax rate 21.0 % 21.0 % 21.0 % U.S. state income taxes, net of U.S. federal income tax effect 7.4 7.2 7.1 Tax credits and benefits, net of related expenses (11.3) (12.4) (6.8) Other, net 0.3 1.4 (1.2) Effective tax rate 17.4 % 17.2 % 20.1 % The following table summarizes the tax effects of temporary differences that give rise to a significant portion of deferred tax assets and liabilities as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Deferred tax assets: Allowance for loan losses $ 166,398 $ 192,534 Investments in qualified affordable housing partnerships, tax credit and other investments, net 14,977 11,174 Deferred compensation 23,954 23,604 Interest income on nonaccrual loans 4,192 5,909 State taxes 5,237 273 Unrealized losses on securities 37,423 — Tax credit carryforwards 8,692 — Premises and equipment 1,434 2,096 Lease liabilities 31,324 30,554 Other 1,018 1,441 Total deferred tax assets $ 294,649 $ 267,585 Deferred tax liabilities: Equipment lease financing $ 26,607 $ 29,990 Investments in qualified affordable housing partnerships, tax credit and other investments, net 12,187 14,912 Core deposit intangibles 1,119 1,934 FHLB stock dividends 1,886 1,855 Mortgage servicing assets 1,759 1,675 Acquired debts 1,536 1,597 Prepaid expenses 1,525 1,194 Premises and equipment — 99 Unrealized gains on securities — 21,593 Operating lease right-of-use assets 29,472 28,468 Other 428 453 Total deferred tax liabilities $ 76,519 $ 103,770 Net deferred tax assets $ 218,130 $ 163,815 The tax benefits of deductible temporary differences and tax carryforwards are recorded as an asset to the extent that management assesses the utilization of such temporary differences and carryforwards to be more-likely-than-not. A valuation allowance is used, as needed, to reduce the deferred tax assets to the amount that is more-likely-than-not to be realized. Evidence the Company considers includes the Company’s ability to generate future taxable income, implement tax-planning strategies (as defined in ASC 740, Income Taxes ), and utilize taxable income from prior carryback years (if such carryback is permitted under the applicable tax law), as well as future reversals of existing taxable temporary differences. The Company expects to have sufficient taxable income in future years to fully realize its deferred tax assets. The Company also performed an overall assessment by weighing all positive evidence against all negative evidence and concluded that it is more-likely-than-not that all of the benefits of the deferred tax assets will be realized, with the exception of the deferred tax assets related to certain state net operating losses carryforwards. No valuation allowance was recorded as of both December 31, 2021 and 2020. The following table presents a reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Beginning balance $ 5,045 $ — $ 4,378 Additions for tax positions related to prior years — 5,045 30,103 Deductions for tax positions related to prior years — — (34,481) Ending balance $ 5,045 $ 5,045 $ — The Company believes that adequate provisions have been recorded for all income tax uncertainties consistent with the standards of ASC 740-10. The Company recognizes interest and penalties, as applicable, related to the underpayment of income taxes as a component of Income tax expense on the Consolidated Statement of Income. The Company recorded a charge of $921 thousand of interest for the year ended December 31, 2021. In comparison, a charge of $564 thousand of interest and a reversal of $6.3 million of interest and penalties were recorded for the years ended December 31, 2020 and 2019, respectively. Total accrued interest included in Accrued expenses and other liabilities on the Consolidated Balance Sheet was $921 thousand and $564 thousand as of December 31, 2021 and 2020, respectively. Beginning with its 2012 tax year, the Company has executed a Memorandum of Understanding (“MOU”) with the Internal Revenue Service (“IRS”) to voluntarily participate in the IRS Compliance Assurance Process (“CAP”). Under the CAP, the IRS audits the tax position of the Company to identify and resolve any tax issues that may arise throughout the tax year. The objective of the CAP is to resolve issues in a timely and contemporaneous manner and eliminate the need for a lengthy post-filing examination. The Company has executed a MOU with the IRS for the 2019 tax year. For federal tax purposes, the IRS had completed the 2017 and earlier tax years’ corporate income tax return examination. For the 2020 and 2021 tax years, the Company was accepted by the IRS as a CAP Bridge Year. The Company is also currently being audited by the states of Missouri, California, and New York, as well as by the city of New York. The Company does not believe that the outcome of unresolved issues or claims in any tax jurisdiction is likely to be material to the Company’s financial position, cash flows or results of operations. The Company believes that adequate provisions have been recorded for all income tax uncertainties consistent with ASC 740, Income Taxes as of December 31, 2021.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Commitments to Extend Credit — In the normal course of doing business, the Company provides customers loan commitments on predetermined terms. These outstanding commitments to extend credit 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 credit commitments, and outstanding commercial letters of credit and SBLCs. The following table presents the Company’s credit-related commitments as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Expire After Five Years Total Total Loan commitments $ 3,282,433 $ 123,780 $ 2,740,508 $ 764,677 $ 6,911,398 $ 5,690,917 Commercial letters of credit and SBLCs 1,116,404 346,303 119,356 639,636 2,221,699 2,240,813 Total $ 4,398,837 $ 470,083 $ 2,859,864 $ 1,404,313 $ 9,133,097 $ 7,931,730 Loan commitments are agreements to lend to customers provided there are no violations of any conditions 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 are generally 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 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 the customers fail to pay, the Company would, as applicable, liquidate the collateral and/or offset accounts. As of December 31, 2021, total letters of credit of $2.22 billion consisted of SBLCs of $2.14 billion and commercial letters of credit of $78.9 million. In comparison, total letters of credit of $2.24 billion consisted of SBLCs of $2.12 billion and commercial letters of credit of $124.9 million as of December 31, 2020. As of both December 31, 2021 and 2020, substantially all SBLCs were rated as “Pass” by the Bank’s internal credit risk rating system. The Company applies the same credit underwriting criteria to extend loans, commitments and conditional obligations to customers. Each customer’s creditworthiness is evaluated on a case-by-case basis. Collateral and financial guarantees may be obtained based on management’s assessment of a customer’s credit. Collateral may include cash, accounts receivable, inventory, property, plant and equipment, and commercial property. Estimated exposure to loss from these commitments is included in the allowance for unfunded credit commitments, and amounted to $27.5 million and $33.5 million as of December 31, 2021 and 2020, respectively. Guarantees — From time to time, the Company sells or securitizes single-family and multifamily residential loans with recourse in the ordinary course of business. The Company is obligated to repurchase up to the recourse component of the loans if the loans default. The following table presents the carrying amounts of loans sold or securitized with recourse and the maximum potential future payments as of December 31, 2021 and 2020: ($ in thousands) Maximum Potential Future Payments Carrying Value December 31, December 31, 2021 2020 2021 2020 Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Expire After Five Years Total Total Total Total Single-family residential loans sold or securitized with recourse $ 33 $ 329 $ 37 $ 7,527 $ 7,926 $ 10,526 $ 7,926 $ 10,526 Multifamily residential loans sold or securitized with recourse — — — 14,996 14,996 15,672 23,169 26,619 Total $ 33 $ 329 $ 37 $ 22,523 $ 22,922 $ 26,198 $ 31,095 $ 37,145 The Company’s recourse reserve related to these guarantees is included in the allowance for unfunded credit commitments and totaled $29 thousand and $88 thousand as of December 31, 2021 and 2020, respectively. The allowance for unfunded credit commitments is included in Accrued expenses and other liabilities on the Consolidated Balance Sheet. The Company continues to experience minimal losses from the single-family and multifamily residential loan portfolios sold or securitized with recourse. Litigation — The Company is a party to various legal actions arising in the normal course of doing business. In accordance with ASC 450, Contingencies , the Company accrues reserves for outstanding lawsuits, claims and proceedings when a loss contingency is probable and can be reasonably estimated. The Company estimates the amount of loss contingencies using current available information from legal proceedings, advice from legal counsel and available insurance coverage. Due to the inherent subjectivity of the assessments and unpredictability of the outcomes of the legal proceedings, any amounts accrued or included in this aggregate amount may not represent the ultimate loss to the Company from the legal proceedings in question. Thus, the Company’s exposure and ultimate losses may be higher, and possibly significantly more than the amounts accrued. Other Commitments — The Company has commitments to invest in qualified affordable housing partnerships, tax credit and other investments as discussed in Note 7 — Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities to the Consolidated Financial Statements in this Form 10-K. As of December 31, 2021 and 2020, these commitments totaled $309.6 million and $182.7 million, respectively. These commitments are included in Accrued expenses and other liabilities

Stock Compensation Plans

Stock Compensation Plans	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock Compensation Plans	Stock Compensation PlansPursuant to the Company’s 2021 Stock Incentive Plan, as amended, the Company may issue stocks, stock options, restricted stock, RSUs including performance-based RSUs, stock purchase warrants, stock appreciation rights, phantom stock and dividend equivalents to eligible employees, non-employee directors, consultants, and other service providers of the Company and its subsidiaries. The Company has granted RSUs as its primary incentive awards. There were no outstanding awards other than RSUs as of December 31, 2021, 2020 and 2019. An aggregate of 17.1 million shares of common stock were authorized under the 2021 Stock Incentive Plan, and the total number of shares available for grant was approximately 5.4 million as of December 31, 2021. The following table presents a summary of the total share-based compensation expense and the related net tax benefits (deficiencies) associated with the Company’s various employee share-based compensation plans for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Stock compensation costs $ 32,567 $ 29,237 $ 30,761 Related net tax benefits (deficiencies) for stock compensation plans $ 1,760 $ (1,839) $ 4,792 Restricted Stock Units — RSUs are granted under the Company’s long-term incentive plan at no cost to the recipient. RSUs generally cliff vest after three years of continued employment from the date of the grant, and are authorized to settle predominantly in shares of the Company’s common stock. Certain RSUs are settled in cash. Dividends are accrued during the vesting period and are paid at the time of vesting. While a portion of RSUs are time-based vesting awards, others vest subject to the attainment of specified performance goals, referred to as “performance-based RSUs.” Performance-based RSUs are granted annually upon approval by the Company’s Compensation Committee based on the performance in the year prior to the grant date of the award. The number of awards that vests can range from zero to a maximum of 200% of the granted number of awards based on the Company’s achievement of specified performance criteria over a performance period of three years. Compensation costs are calculated using the quoted market price of the Company’s common stock at the grant date. Compensation costs for certain time-based awards that will be settled in cash are adjusted to fair value based on changes in the share price of the Company’s common stock up to the settlement date. For performance-based RSUs, the compensation costs are based on grant date fair value which considers both performance and market conditions, and is subject to subsequent adjustments based on the Company’s outcome in meeting the performance criteria at the end of the performance period. Compensation costs of both time- and performance-based awards are estimated based on awards ultimately expected to vest, and recognized net of estimated forfeitures on a straight-line basis from the grant date until the vesting date of each grant. For accounting on stock-based compensation plans, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Stock-Based Compensation to the Consolidated Financial Statements in this Form 10-K for additional information. The following table presents a summary of the activities for the Company’s time- and performance-based RSUs that will be settled in shares for the year ended December 31, 2021. The number of outstanding performance-based RSUs provided below assumes that performance will be met at the 100% target level. Time-Based RSUs Performance-Based RSUs Shares Weighted- Shares Weighted- Outstanding, January 1, 2021 1,345,635 $ 50.22 398,057 $ 53.66 Granted 417,900 71.88 91,960 77.67 Vested (301,800) 66.85 (120,286) 70.13 Forfeited (131,789) 56.26 — — Outstanding, December 31, 2021 1,329,946 $ 52.65 369,731 $ 54.28 The following table presents a summary of the activities for the Company’s time-based RSUs that will be settled in cash for the year ended December 31, 2021: Shares Outstanding, January 1, 2021 21,802 Granted 24,073 Vested — Forfeited (13,228) Outstanding, December 31, 2021 32,647 The weighted-average grant date fair value of the time-based awards granted during the years ended December 31, 2021, 2020, and 2019 was $71.88, $40.61, and $52.46, respectively. The weighted-average grant date fair value of the performance-based awards granted during the years ended December 31, 2021, 2020 and 2019 was $77.67, $39.79 and $54.64, respectively. The total fair value of time-based awards that vested during the years ended December 31, 2021, 2020 and 2019 was $22.7 million, $11.5 million and $20.7 million, respectively. The total fair value of performance-based awards that vested during the years ended December 31, 2021, 2020, and 2019 was $15.4 million, $8.9 million and $14.5 million, respectively. As of December 31, 2021, there were $24.4 million of unrecognized compensation costs related to unvested time-based RSUs expected to be recognized over a weighted-average period of 1.83 years, and $13.6 million of unrecognized compensation costs related to unvested performance-based RSUs expected to be recognized over a weighted-average period of 1.77 years. Employee Stock Purchase Plan — The 1998 Employee Stock Purchase Plan (the “Purchase Plan”) provides eligible employees of the Company the right to purchase shares of its common stock at a discount. Employees could purchase shares at 90% of the fair market price subject to an annual purchase limitation of $22,500 per employee. As of December 31, 2021, the Purchase Plan qualifies as a non-compensatory plan under Section 423 of the Internal Revenue Code and, accordingly, no compensation expense has been recognized. 2,000,000 shares of the Company’s common stock were authorized for sale under the Purchase Plan. During the years ended December 31, 2021 and 2020, 37,725 shares totaling $2.6 million and 89,425 shares totaling $2.3 million, respectively, were sold to employees under the Purchase Plan. As of December 31, 2021, there were 266,775 shares available under the Purchase Plan.

Stockholders_ Equity and Earnin

Stockholders’ Equity and Earnings Per Share	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Stockholders’ Equity and Earnings Per Share	Stockholders’ Equity and Earnings Per Share The following table presents the basic and diluted EPS calculations for the years ended December 31, 2021, 2020 and 2019. For more information on the calculation of EPS, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Earnings Per Share to the Consolidated Financial Statements in this Form 10-K. ($ and shares in thousands, except per share data) Year Ended December 31, 2021 2020 2019 Basic: Net income available to common stockholders $ 872,981 $ 567,797 $ 674,035 Basic weighted-average number of shares outstanding 141,826 142,336 145,497 Basic EPS $ 6.16 $ 3.99 $ 4.63 Diluted: Net income available to common stockholders $ 872,981 $ 567,797 $ 674,035 Basic weighted-average number of shares outstanding 141,826 142,336 145,497 Diluted potential common shares (1) 1,314 655 682 Diluted weighted-average number of shares outstanding (1) 143,140 142,991 146,179 Diluted EPS $ 6.10 $ 3.97 $ 4.61 (1) Includes dilutive shares from RSUs for the years ended December 31, 2021, 2020 and 2019. Shares are excluded from the computation of EPS when their inclusion has an anti-dilutive effect on EPS. For the years ended December 31, 2021, 2020 and 2019, 6 thousand, 134 thousand and 15 thousand weighted-average shares of anti-dilutive RSUs, respectively, were excluded from the diluted EPS computation. Stock Repurchase Program — In 2020, the Company’s Board of Directors authorized a stock repurchase program to buy back up to $500.0 million of the Company’s common stock, and the Company repurchased 4,471,682 shares at an average price of $32.64 per share, for a total cost of $146.0 million. The Company did not repurchase any shares during the remainder of 2020 and during 2021.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table presents the changes in the components of AOCI balances for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) AFS Cash Foreign (1) Total Balance, December 31, 2018 $ (45,821) $ — $ (12,353) $ (58,174) Net unrealized gains (losses) arising during the period 46,170 — (3,636) 42,534 Amounts reclassified from AOCI (2,768) — — (2,768) Changes, net of tax 43,402 — (3,636) 39,766 Balance, December 31, 2019 $ (2,419) $ — $ (15,989) $ (18,408) Net unrealized gains (losses) arising during the period 63,329 (1,149) 9,297 71,477 Amounts reclassified from AOCI (8,663) (81) — (8,744) Changes, net of tax 54,666 (1,230) 9,297 62,733 Balance, December 31, 2020 $ 52,247 $ (1,230) $ (6,692) $ 44,325 Net unrealized (losses) gains arising during the period (136,846) 866 1,757 (134,223) Amounts reclassified from AOCI (1,104) 621 — (483) Changes, net of tax (137,950) 1,487 1,757 (134,706) Balance, December 31, 2021 $ (85,703) $ 257 $ (4,935) $ (90,381) (1) Represents foreign currency translation adjustments related to the Company’s net investment in non-U.S. operations, including related hedges. The functional currency and reporting currency of the Company’s foreign subsidiary was RMB and USD, respectively. The following table presents the components of other comprehensive income (loss), reclassifications to net income and the related tax effects for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Before - Tax Net-of- Before - Tax Net-of- Before - Tax Net-of- AFS debt securities: Net unrealized (losses) gains arising during the period $ (194,393) $ 57,547 $ (136,846) $ 89,868 $ (26,539) $ 63,329 $ 65,549 $ (19,379) $ 46,170 Net realized (gains) reclassified into net income (1) (1,568) 464 (1,104) (12,299) 3,636 (8,663) (3,930) 1,162 (2,768) Net change (195,961) 58,011 (137,950) 77,569 (22,903) 54,666 61,619 (18,217) 43,402 Cash flow hedges Net unrealized gains (losses) arising during the period 1,210 (344) 866 (1,604) 455 (1,149) — — — Net realized losses (gains) reclassified into net income (2) 868 (247) 621 (113) 32 (81) — — — Net change 2,078 (591) 1,487 (1,717) 487 (1,230) — — — Foreign currency translation adjustments, net of hedges: Net unrealized gains (losses) arising during the period (3) 463 1,294 1,757 7,398 1,899 9,297 290 (3,926) (3,636) Net change 463 1,294 1,757 7,398 1,899 9,297 290 (3,926) (3,636) Other comprehensive (loss) income $ (193,420) $ 58,714 $ (134,706) $ 83,250 $ (20,517) $ 62,733 $ 61,909 $ (22,143) $ 39,766 (1) Pre-tax amounts were reported in Net g ains on sales of AFS debt securities on the Consolidated Statement of Income for the years ended December 31, 2021, 2020 and 2019. (2) Pre-tax amounts were reported in Interest expense on the Consolidated Statement of Income for the years ended December 31, 2021 and 2020. (3) The tax effects on foreign currency translation adjustments, net of hedges represent the cumulative net deferred tax liabilities on net investment hedges since its inception.

Regulatory Requirements and Mat

Regulatory Requirements and Matters	12 Months Ended
	Dec. 31, 2021
Banking and Thrift, Interest [Abstract]
Regulatory Requirements and Matters	Regulatory Requirements and Matters Capital Adequacy — The Company and the Bank are subject to regulatory capital adequacy requirements administered by the federal banking agencies. The Bank is a member bank of the Federal Reserve System and is primarily regulated by the Federal Reserve and the California Department of Financial Protection and Innovation. The Company and the Bank are required to comply with the Basel III Capital Rules adopted by the federal banking agencies as standardized approaches institutions. The Basel III Capital Rules require that banking organizations maintain a minimum Common Equity Tier 1 (“CET1”) capital ratio of at least 4.5%, a Tier 1 capital ratio of at least 6.0%, a total capital ratio of at least 8.0%, and a Tier 1 leverage ratio of a least 4.0% to be considered adequately capitalized. Failure to meet the minimum capital requirements can result in certain mandatory actions and possibly additional discretionary actions by the regulators that, if undertaken, could have a direct material effect on the Company’s Consolidated Financial Statements. The Company and the Bank are also subject to maintain a capital conservation buffer of 2.5% above the minimum risk-based capital ratios under the Basel III Capital Rules. Banking institutions with a ratio of CET1 to risk-weighted assets above the minimum but below the capital conservation buffer will face constraints on dividends, equity repurchases and compensation based on the amount of the shortfall. The FDIC Improvement Act of 1991 requires that the federal regulatory agencies adopt regulations defining capital categories for banks: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized and critically undercapitalized. Consistent with the Basel III Capital Rules, the capital categories were augmented by including the CET1 capital measure, and revised risk-based capital measures to reflect the rule changes to the minimum risk-based capital ratios. Effective January 1, 2020, the Company adopted the ASU 2016-13 Financial Instruments — Credit Losses (Topic 326) Measurement of Credit Losses on Financial instrument that introduced the CECL methodology . In March 2020, the federal banking agencies issued the Interim Final Rule that provided banking organizations that adopted the CECL with the phase-in option to delay t he estimated impact of CECL on regulatory capital. The Bank and the Company have elected the CECL phase-in option in 2020. As a result, the Bank and the Company delayed the impact of CECL on regulatory capital through the year 2021, after which the effects are being phased in over a three-year period from January 1, 2022 through December 31, 2024. As of December 31, 2021 and 2020, the Company and the Bank were both categorized as well capitalized based on applicable U.S. regulatory capital ratio requirements in accordance with Basel III standardized approaches, as set forth in the table below. The Company believes that no changes in conditions or events have occurred since December 31, 2021, which would result in changes that would cause the Company or the Bank to fall below the well capitalized level. The following table presents the regulatory capital information of the Company and the Bank as of December 31, 2021 and 2020: ($ in thousands) Basel III December 31, 2021 December 31, 2020 Minimum Fully Phased-in Minimum Capital Ratios (3) Well- Actual Actual Amount Ratio Amount Ratio Ratio Ratio Ratio Total capital (to risk-weighted assets) Company $ 6,124,827 14.1 % $ 5,510,640 14.3 % 8.0 % 10.5 % 10.0 % East West Bank $ 5,766,734 13.2 % $ 5,143,246 13.4 % 8.0 % 10.5 % 10.0 % Tier 1 capital (to risk-weighted assets) Company $ 5,559,357 12.8 % $ 4,882,555 12.7 % 6.0 % 8.5 % 6.0 % East West Bank $ 5,349,264 12.3 % $ 4,662,426 12.1 % 6.0 % 8.5 % 8.0 % CET1 capital (to risk-weighted assets) Company $ 5,559,357 12.8 % $ 4,882,555 12.7 % 4.5 % 7.0 % 6.5 % East West Bank $ 5,349,264 12.3 % $ 4,662,426 12.1 % 4.5 % 7.0 % 6.5 % Tier 1 leverage capital (to adjusted average assets) Company (1) $ 5,559,357 9.0 % $ 4,882,555 9.4 % 4.0 % 4.0 % N/A East West Bank $ 5,349,264 8.6 % $ 4,662,426 9.0 % 4.0 % 4.0 % 5.0 % Risk-weighted assets Company $ 43,585,105 N/A $ 38,406,071 N/A N/A N/A N/A East West Bank $ 43,572,086 N/A $ 38,481,275 N/A N/A N/A N/A Adjusted quarterly average total assets (2) Company $ 62,387,003 N/A $ 52,540,964 N/A N/A N/A N/A East West Bank $ 62,366,514 N/A $ 52,594,313 N/A N/A N/A N/A (1) The Tier 1 leverage capital well-capitalized requirement applies only to the Bank since there is no Tier 1 leverage ratio component in the definition of a well-capitalized bank holding company. (2) Reflects adjusted quarterly average total assets for the years ended December 31, 2021 and 2020. (3) Includes a 2.5% capital conservation buffer requirement above the minimum risk-based capital ratios. N/A — Not applicable. Reserve Requirement — The Bank is required to maintain a percentage of its deposits as reserves at the Federal Reserve. In an effort to provide monetary stimulus to counteract the economic disruption caused by the COVID-19 pandemic, the Federal Reserve reduced reserve requirement ratio to zero percent. The daily average reserve requirements were zero as of both December 31, 2021 and 2020.

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Business Segments	Business Segments The Company organizes its operations into three reportable operating segments: (1) Consumer and Business Banking; (2) Commercial Banking; and (3) Other. These segments are defined by the type of customers served, and the related products and services provided. The segments reflect how financial information is currently evaluated by management. Operating segment results are based on the Company’s internal management reporting process, which reflects assignments and allocations of certain balance sheet and income statement items. The information presented is not indicative of how the segments would perform if they operated as independent entities due to the interrelationships among the segments. The Consumer and Business Banking segment primarily provides financial products and services to consumer and commercial customers through the Company’s domestic branch network and digital banking platform. This segment offers consumer and commercial deposits, mortgage and home equity loans, and other products and services. It also originates commercial loans for small- and medium-sized enterprises through the Company’s branch network. Other products and services provided by this segment include wealth management, treasury management, interest rate risk hedging and foreign exchange services. The Commercial Banking segment primarily generates commercial loans and deposits. Commercial loan products include commercial real estate lending, construction finance, working capital lines of credit, trade finance, letters of credit, commercial business lending, affordable housing lending, asset-based lending, asset-backed finance, project finance and equipment financing. Commercial deposit products and other financial services include treasury management, foreign exchange services, and interest rate and commodity risk hedging. The remaining centralized functions, including the corporate treasury activities of the Company 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, namely the Consumer and Business Banking and the Commercial Banking segments. The Company utilizes an internal reporting process to measure the performance of the three operating segments within the Company. The internal reporting process derives operating segment results by utilizing allocation methodologies for revenues and expenses. Net interest income of each segment represents the difference between actual interest earned on assets and interest incurred on liabilities of the segment, adjusted for funding charges or credits through the Company’s internal funds transfer pricing (“FTP”) process. Noninterest income and noninterest expense directly attributable to a business segment are assigned to that segment. Indirect costs, including technology-related costs and corporate overhead, are allocated based on a segment’s estimated usage using factors including but not limited to, full-time equivalent employees, net interest income, and loan and deposit volume. Charge-offs are booked to the segment directly associated with the loans charged off, and the provision for credit losses is booked to segments based on related loans for which allowances are evaluated. The Company’s internal reporting process utilizes a full-allocation methodology. Under this methodology, corporate and indirect expenses incurred by the Other segment are allocated to the Consumer and Business Banking and the Commercial Banking segments, except certain corporate treasury-related expenses and insignificant unallocated expenses. The corporate treasury function within the Other segment is responsible for the Company’s liquidity and interest rate management. The Company’s internal FTP process is also managed by the corporate treasury function within the Other segment. The process is formulated with the goal of encouraging loan and deposit growth that is consistent with the Company’s overall profitability objectives, as well as providing a reasonable and consistent basis for the measurement of its business segments’ net interest margins and profitability. The FTP process charges a cost to fund loans (“FTP charges for loans”) and allocates credits for funds provided from deposits (“FTP credits for deposits”) using internal FTP rates. FTP charges for loans are determined based on a matched cost of funds, which is tied to the pricing and term characteristics of the loans. FTP credits for deposits are based on matched funding credit rates, which are tied to the implied or stated maturity of the deposits. FTP credits for deposits reflect the long-term value generated by the deposits. The FTP process transfers the corporate interest rate risk exposure to the treasury function within the Other segment, where such exposures are centrally managed. The Company’s internal FTP assumptions and methodologies are reviewed at least annually to ensure that the process is reflective of current market conditions. The following tables present the results of operations and other key financial measures for the individual operating segments as of and for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Consumer and Commercial Other Total Year Ended December 31, 2021 Net interest income before reversal of provision for credit losses $ 697,101 $ 766,202 $ 68,268 $ 1,531,571 Reversal of provision for credit losses (4,998) (30,002) — (35,000) Noninterest income (1) 94,125 163,768 28,002 285,895 Noninterest expense 364,635 271,408 160,046 796,089 Segment income (loss) before income taxes (1) 431,589 688,564 (63,776) 1,056,377 Segment net income (1) $ 308,630 $ 492,271 $ 72,080 $ 872,981 As of December 31, 2021 Segment assets $ 14,961,809 $ 28,556,706 $ 17,352,186 $ 60,870,701 ($ in thousands) Consumer and Commercial Other Total Year Ended December 31, 2020 Net interest income before provision for credit losses $ 530,829 $ 706,286 $ 140,078 $ 1,377,193 Provision for credit losses 3,885 206,768 — 210,653 Noninterest income (1) 64,115 142,337 29,095 235,547 Noninterest expense 331,750 266,923 117,649 716,322 Segment income before income taxes (1) 259,309 374,932 51,524 685,765 Segment net income (1) $ 185,782 $ 268,476 $ 113,539 $ 567,797 As of December 31, 2020 Segment assets $ 13,351,060 $ 26,958,766 $ 11,847,087 $ 52,156,913 ($ in thousands) Consumer and Commercial Other Total Year Ended December 31, 2019 Net interest income before provision for credit losses $ 696,551 $ 651,413 $ 119,849 $ 1,467,813 Provision for credit losses 14,178 84,507 — 98,685 Noninterest income (1) 57,238 135,305 29,702 222,245 Noninterest expense 343,001 263,064 141,391 747,456 Segment income before income taxes (1) 396,610 439,147 8,160 843,917 Segment net income (1) $ 283,674 $ 314,321 $ 76,040 $ 674,035 As of December 31, 2019 Segment assets $ 11,520,586 $ 25,501,534 $ 7,173,976 $ 44,196,096 (1) During the fourth quarter of 2021, the Company enhanced its segment allocation methodology related to the fair values of interest rate and commodity derivative contracts, which are included in noninterest income. These fair values that were previously allocated to the “Commercial Banking” segment, have been reclassified between “Consumer and Business Banking” and “Commercial Banking.” Prior years’ balances have been reclassified to conform to the 2021 presentation.

Parent Company Condensed Financ

Parent Company Condensed Financial Statements	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Parent Company Condensed Financial Statements	Parent Company Condensed Financial StatementsThe principal sources of East West’s income (on a Parent Company-only basis) are dividends from the Bank. In addition to dividend restrictions set forth in statutes and regulations, the banking agencies have the authority to prohibit or to limit the Bank from paying dividends, if, in the banking regulator’s opinion, payment of a dividend would constitute an unsafe or unsound practice in light of the financial condition of the Bank. The Bank declared $200.0 million, $511.0 million and $190.0 million of dividends to East West during the years ended December 31, 2021, 2020 and 2019, respectively. The following tables present the Parent Company-only condensed financial statements: CONDENSED BALANCE SHEET ($ in thousands, except shares) December 31, 2021 2020 ASSETS Cash and cash equivalents due from subsidiary bank $ 345,018 $ 439,065 Investments in subsidiaries: Bank 5,626,975 5,048,896 Nonbank 9,136 6,738 Investments in tax credit investments, net 4,082 6,586 Other assets 9,407 3,072 TOTAL $ 5,994,618 $ 5,504,357 LIABILITIES Long-term debt $ 147,658 $ 147,376 Accrued income tax payable — 81,741 Other liabilities 9,742 6,065 Total liabilities 157,400 235,182 STOCKHOLDERS’ EQUITY Common stock, $0.001 par value, 200,000,000 shares authorized; 167,790,645 and 167,240,600 shares issued in 2021 and 2020, respectively 168 167 Additional paid-in capital 1,893,557 1,858,352 Retained earnings 4,683,659 4,000,414 Treasury stock, at cost 25,882,691 shares in 2021 and 25,675,371 shares in 2020 (649,785) (634,083) AOCI, net of tax (90,381) 44,325 Total stockholders’ equity 5,837,218 5,269,175 TOTAL $ 5,994,618 $ 5,504,357 CONDENSED STATEMENT OF INCOME ($ in thousands) Year Ended December 31, 2021 2020 2019 Dividends from subsidiaries: Bank $ 200,000 $ 511,000 $ 190,000 Nonbank 82 109 189 Other income 11 3 425 Total income 200,093 511,112 190,614 Interest expense on long-term debt 2,974 3,877 6,482 Compensation and employee benefits 6,370 6,210 5,479 Amortization of tax credit and other investments 425 1,248 8,437 Other expense 1,306 1,184 1,487 Total expense 11,075 12,519 21,885 Income before income tax benefit and equity in undistributed income of subsidiaries 189,018 498,593 168,729 Income tax benefit 3,005 4,158 6,737 Undistributed earnings of subsidiaries, primarily bank 680,958 65,046 498,569 Net income $ 872,981 $ 567,797 $ 674,035 CONDENSED STATEMENT OF CASH FLOWS ($ in thousands) Year Ended December 31, 2021 2020 2019 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 872,981 $ 567,797 $ 674,035 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed earnings of subsidiaries, principally bank (680,958) (65,046) (498,569) Amortization expense 1,877 1,523 8,703 Deferred income tax expense (benefit) 2,721 491 (10,132) Net change in other assets (5,685) 40 10,246 Net change in other liabilities (81,706) 77,052 (18) Net cash provided by operating activities 109,230 581,857 184,265 CASH FLOWS FROM INVESTING ACTIVITIES Net increase in investments in tax credit investments (346) (172) (292) Distributions received from equity method investees 436 4,096 2,577 Net increase in investments in and advances to nonbank subsidiaries (1,476) (2,732) (3,314) Other investing activities — — (157) Net cash (used in) provided by investing activities (1,386) 1,192 (1,186) CASH FLOWS FROM FINANCING ACTIVITIES Common stock: Proceeds from issuance pursuant to various stock compensation plans and agreements 2,573 2,326 3,383 Stock tendered for payment of withholding taxes (15,702) (8,253) (14,635) Repurchased of common stock pursuant to the Stock Repurchase Program — (145,966) — Cash dividends paid (188,762) (158,222) (155,107) Net cash used in financing activities (201,891) (310,115) (166,359) Net (decrease) increase in cash and cash equivalents (94,047) 272,934 16,720 Cash and cash equivalents, beginning of year 439,065 166,131 149,411 Cash and cash equivalents, end of year $ 345,018 $ 439,065 $ 166,131

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn January 27, 2022, the Company’s Board of Directors declared first quarter 2022 cash dividends for the Company’s common stock. The common stock cash dividend of $0.40 per share was paid on February 22, 2022 to stockholders of record as of February 7, 2022.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation — The accounting and reporting policies of the Company conform with the U.S. Generally Accepted Accounting Principles (“GAAP”), applicable guidelines prescribed by regulatory authorities and general practices in the banking industry. The preparation of the Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the Consolidated Financial Statements, income and expenses during the reporting period, and the related disclosures. Actual results could differ materially from those estimates. Certain items on the Consolidated Financial Statements and notes for the prior years have been reclassified to conform to the 2021 presentation.
Principles of Consolidation	Principles of Consolidation — The Consolidated Financial Statements in this Form 10-K include the accounts of East West and its subsidiaries. Intercompany transactions and accounts have been eliminated in consolidation. East West also has six wholly-owned subsidiaries that are statutory business trusts (the “Trusts”). In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 810, Consolidation, the Trusts are not included on the Consolidated Financial Statements.
Cash and Cash Equivalents	Cash and Cash Equivalents — Cash and cash equivalents include cash on hand, cash items in transit, cash due from the Federal Reserve Bank of San Francisco (“FRBSF”) and other financial institutions, and federal funds sold with original maturities up to three months.
Interest-Bearing Deposits with Banks	Interest-Bearing Deposits with Banks — Interest-bearing deposits with banks include cash placed with other banks with original maturities greater than three months and less than one year.
Assets Purchased under Resale Agreements and Assets Sold under Repurchase Agreements	Assets Purchased under Resale Agreements and Assets Sold under Repurchase Agreements — Resale agreements are recorded as receivables based on the values at which the securities or loans are acquired. Repurchase agreements are accounted for as collateralized financing transactions and recorded as liabilities based on the values at which the securities are sold. The Company monitors the values of the underlying assets collateralizing the resale and repurchase agreements, including accrued interest, and obtains or posts additional collateral in order to maintain the appropriate collateral requirements for the transactions. In addition, the Company has elected to offset resale and repurchase transactions with the same counterparty on the Consolidated Balance Sheet when it has a legally enforceable master netting agreement and when the transactions are eligible for netting under ASC 210-20-45-11, Balance Sheet Offsetting: Repurchase and Reverse Repurchase Agreements
Securities	Securities — The Company’s securities include various debt securities, marketable equity securities and restricted equity securities. Debt securities are recorded on the Consolidated Balance Sheet as of their trade dates. The Company classifies its debt securities as trading securities, AFS or held-to-maturity debt securities based on management’s intention on the date of the purchase. Debt securities are purchased for liquidity and investment purposes, as part of asset-liability management and other strategic activities. Debt securities for which the Company does not have the positive intention and ability to hold to maturity are classified as AFS. AFS debt securities are reported at fair value with unrealized gains and losses, net of applicable income taxes, and are included in AOCI, net of the allowance for credit losses. Interest income, including amortization of any premium or discount, is included in net income. We recognize realized gains and losses on the sale of AFS debt securities in earnings, using the specific identification method. For allowance for credit losses on AFS debt securities, refer to the Allowance for Credit Losses on Available-for-Sale Debt Securities section of this note for details. Marketable equity securities that have readily determinable fair values are recorded at fair value with unrealized gains and losses, due to changes in fair value, reflected in earnings. Marketable equity securities include mutual fund investments, which are included in Investments in tax credit and other investments, net on the Consolidated Balance Sheet. Non-marketable equity securities that do not have readily determinable fair values are accounted for under one of the following accounting methods: • Equity Method — When we have the ability to exert significant influence over the investee. • Cost Method — The cost method is applied to investments such as FRBSF and FHLB stock. These investments are held at their cost minus impairment. If impaired, the carrying value is written down to the fair value of the security. • Measurement Alternative — This method is applied to all remaining non-marketable equity securities. These securities are carried at cost adjusted for impairment, if any, plus or minus observable price changes in orderly transactions of an identical or similar security of the same issuer. Non-marketable equity securities include tax credit investments that are included in Investments in tax credit and other investments, net, and Other assets on the Consolidated Balance Sheet. Our impairment review for equity method, cost method and measurement alternative securities typically includes an analysis of the facts and circumstances of each security, the intent or requirement to sell the security, the expectations of cash flows, capital needs and the viability of its business model. For equity method and cost method investments, we reduce the asset’s carrying value when we consider declines in value to be other-than-temporary impairment (“OTTI”). For securities accounted for under the measurement alternative, we reduce the asset value when the fair value is less than the carrying value, without the consideration of recovery.
Restricted Equity Securities	Restricted equity securities include FRBSF and FHLB stock. The FRBSF stock is required by law to be held as a condition of membership in the Federal Reserve System. The FHLB stock is required to obtain advances from the FHLB. They are carried at cost as they do not have a readily determinable fair value.
Loans Held-for-Sale	Loans Held-for-Sale — Loans are initially classified as loans held-for-sale when they are individually identified as being available for immediate sale and management has committed to a formal plan to sell them. Loans held-for-sale are carried at lower of cost or fair value. Subject to periodic review under the Company’s evaluation process, including asset/liability and credit risk management, the Company may transfer certain loans from held-for-investment to held-for-sale measured at lower of cost or fair value. Any write-downs in the carrying amount of the loan at the date of transfer are recorded as charge-offs to allowance for loan losses. Loan origination fees on loans held-for-sale, net of certain costs in processing and closing the loans, are deferred until the time of sale and are included in the periodic determination of the lower of cost or fair value adjustments and/or the gain or loss recognized at the time of sale. A valuation allowance is established if the fair value of such loans is lower than their cost, with a corresponding charge to noninterest income. If the loan or a portion of the loan cannot be sold, it is subsequently transferred back to the loans held-for-investment portfolio from the loans held-for-sale portfolio at the lower of cost or fair value on the transfer date.
Loans Held-for-Investment	Loans Held-for-Investment — At the time of commitment to originate or purchase a loan, the loan is determined to be held-for-investment if it is the Company’s intent to hold the loan to maturity or for the “foreseeable future”. Loans held-for-investment are stated at their outstanding principal, reduced by an allowance for loan losses and net of deferred loan fees or costs, or unearned fees on originated loans, net of unamortized premiums or unaccreted discounts on purchased loans. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs are recognized in interest income as an adjustment to yield over the loan term using the effective interest method or straight-line method. Discounts/premiums on purchased loans are accreted/amortized to interest income using the effective interest method or straight-line method over the remaining period to the contractual maturity. Interest on loans is calculated using the simple-interest method on daily balances of the principal amounts outstanding. Generally, loans are placed on nonaccrual status when they become 90 days past due or more. Loans are considered past due when contractually required principal or interest payments have not been made on the due dates. Loans are also placed on nonaccrual status when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of principal or interest becomes uncertain, regardless of the length of past due status. Once a loan is placed on nonaccrual status, interest accrual is discontinued and all unpaid accrued interest is reversed against interest income. Interest payments received on nonaccrual loans are reflected as a reduction of principal and not as interest income. A loan is returned to accrual status when the borrower has demonstrated a satisfactory payment trend subject to management’s assessment of the borrower’s ability to repay the loan.
Troubled Debt Restructurings	Troubled Debt Restructurings — A loan is generally classified as a troubled debt restructuring (“TDR”) when the Company, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The concessions may be granted in various forms, including a below-market change in the stated interest rate, a reduction in the loan balance or accrued interest, an extension of the maturity date with a stated interest rate lower than the current market rate or note splits referred to as A/B note restructurings. Loans with contractual terms that have been modified as a TDR and are current at the time of restructuring may remain on accrual status if there is demonstrated performance prior to the restructuring and payment in full under the restructured terms is expected. Otherwise, these loans are placed on nonaccrual status and are reported as nonperforming, until the borrower demonstrates a sustained period of performance, generally six months, and the ability to repay the loan according to the contractual terms. If accruing TDRs cease to perform in accordance with their modified contractual terms, they are placed on nonaccrual status and reported as nonperforming TDRs. TDRs are included in the quarterly allowance for credit losses valuation process. Refer to Allowance for Loan Losses below for a complete discussion. The Company has implemented various loan modification programs to provide its borrowers relief from the economic impacts of the COVID-19 pandemic. As provided under Section 4013 of the CARES Act, as amended by the Consolidated Appropriations Act, 2021 (“CAA”), the Company has elected not to apply TDR classification to any COVID-19 pandemic- related loan modifications that were executed after March 1, 2020 and earlier of (A) 60 days after the national emergency termination date concerning the COVID-19 pandemic outbreak or (B) January 1, 2022 to borrowers who were current as of December 31, 2019. For loans that were modified in response to the COVID-19 pandemic that do not meet the CARES Act criteria (e.g., current payment status as of December 31, 2019), the Company has applied the guidance included in the “ Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customer Affected by the Coronavirus (Revised) ” (the “Interagency Statement”) issued by the federal banking regulators on April 7, 2020. The Interagency Statement states that short-term loan modifications (i.e. six months or less) are not TDRs if they were made on a good faith basis in response to the COVID-19 pandemic to borrowers who were current as of the implementation date of a loan modification program. The aging on the delinquency of the loans modified under the CARES Act, as amended by the CAA, and the Interagency Statement is frozen at the time of the modification. Interest income continues to be recognized over the accommodation period.
Paycheck Protection Program	Paycheck Protection Program — In 2020 and 2021, the Company accepted Paycheck Protection Program (“PPP”) applications and originated loans to qualified small businesses under the PPP established by the CARES Act. The SBA stopped accepting new loan applications on May 31, 2021. PPP loans are included in the C&I loan portfolio, carrying an interest rate of 1%, and are 100% guaranteed by the Small Business Administration (“SBA”). No allowance for loan losses was recorded for these loans as of December 31, 2021 and 2020. As of December 31, 2021, the Company had approximately 1,800 SBA 7(a) approved PPP loans with an outstanding loan balance of $534.2 million. The majority of the Company’s remaining PPP loans have a term of five years. The SBA paid the Company fees for processing PPP loans and such fees are accounted for as loan origination fees, where net deferred fees are recognized over the estimated life of the loan as a yield adjustment on the loans. Under the terms of the PPP, if certain conditions are satisfied, such loans are eligible to be forgiven in which case the SBA will make payments to the Company for the forgiven amounts. If a loan is paid off or forgiven by the SBA prior to its projected estimated life, the remaining unamortized deferred fees will be recognized as interest income in that period.
Allowance for Credit Losses	Allowance for Loan Losses — The Company adopted ASU 2016-13, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments on January 1, 2020, which introduced a new current expected credit losses (“CECL”) model. The allowance for loan losses is established as management’s estimate of expected credit losses inherent in the Company’s lending activities; it is increased by the provision for credit losses and decreased by net charge-offs. The allowance for loan losses is evaluated quarterly by management based on regular reviews of the collectability of the Company’s loans, and more often if deemed necessary. The Company develops and documents the allowance for loan losses methodology at the portfolio segment level. The commercial loan portfolio is comprised of C&I, CRE, multifamily residential, and construction and land loans; and the consumer loan portfolio is comprised of single-family residential, HELOCs, and other consumer loans. The allowance for loan losses represents the portion of a loan’s amortized cost basis that the Company does not expect to collect due to anticipated credit losses over the loan’s contractual life, adjusted for prepayments. The Company measures the expected loan losses on a collective pool basis when similar risk characteristics exist. Models consisting of quantitative and qualitative components are designed for each pool to develop the expected credit loss estimates. Reasonable and supportable forecast periods vary by loan portfolio. The Company has adopted lifetime loss rate models for the portfolios, which use historical loss rates and forecast economic variables to calculate the expected credit losses for each loan pool. When loans do not share similar risk characteristics, the Company evaluates the loan for expected credit losses on an individual basis. Individually assessed loans include nonaccrual and TDR loans. The Company evaluates loans for expected credit losses on an individual basis if, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the original contractual terms of the loan agreement. The following three different asset valuation measurement methods are available: (1) the present value of expected future cash flows, (2) the fair value of collateral less costs to sell, and (3) the loan's observable market price. The allowance for loan losses for collateral-dependent loans is determined based on the fair value of the collateral less costs to sell. For loans that are not collateral-dependent, the Company applies the present value of expected future cash flows valuation or the market value of the loan. When the loan is deemed uncollectible, it is the Company’s policy to charge off the uncollectible amount against the allowance for credit losses. The amortized cost of loans held-for-investment excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election to not recognize an allowance for credit losses for accrued interest receivables as the Company reverses accrued interest if a loan is on nonaccrual status. The allowance for loan losses is reported separately on the Consolidated Balance Sheet and the Provision for credit losses is reported on the Consolidated Statement of Income. Allowance for Unfunded Credit Commitments — The allowance for unfunded credit commitments includes reserves provided for unfunded loan commitments, letters of credit, standby letters of credit (“SBLCs”) and recourse obligations for loans sold. The Company estimates the allowance for unfunded credit commitments over the contractual period in which the entity is exposed to credit risk via a present contractual obligation to extend credit. Within the period of credit exposure, the estimate of credit losses will consider both the likelihood that funding will occur, and an estimate of the expected credit losses on the commitments that are expected to fund over their estimated lives. The allowance for unfunded credit commitments is maintained at a level believed by management to be sufficient to absorb estimated expected credit losses related to unfunded credit facilities. The determination of the adequacy of the allowance is based on periodic evaluations of the unfunded credit facilities. For all off-balance sheet instruments and commitments, the unfunded credit exposure is calculated using assumptions based on the Company's historical utilization experience in related portfolio segments. Loss rates are applied to the calculated exposure balances to estimate the allowance for unfunded credit commitments. Other elements such as credit risk factors for loans outstanding, terms and expiration dates of the unfunded credit facilities, and other pertinent information are considered to determine the adequacy of the allowance. The allowance for unfunded credit commitments is included in the Accrued expenses and other liabilities on the Consolidated Balance Sheet. Changes to the allowance for unfunded credit commitments are included in Provision for credit losses on the Consolidated Income Statements. Allowance for Credit Losses on Available-for-Sale Debt Securities — For each reporting period, every AFS debt security that is in an unrealized loss position is individually analyzed as part of the Company’s ongoing assessments to determine whether a fair value below the amortized cost basis has resulted from a credit loss or other factors. The initial indicator of impairment is a decline in fair value below the amortized cost of the AFS debt security, excluding accrued interest. The Company first considers whether there is a plan to sell the AFS debt security or it is more-likely-than-not that it will be required to sell the debt security before recovery of the amortized cost. In determining whether an impairment is due to credit related factors, the Company considers the severity of the decline in fair value, nature of the security, the underlying collateral, the financial condition of the issuer, changes in the AFS debt security’s ratings and other qualitative factors. For AFS debt securities that are guaranteed or issued by the U.S. government, or government-sponsored enterprises of high credit quality, the Company applies a zero credit loss assumption. When the Company does not intend to sell the impaired AFS debt security and it is more-likely-than-not that the Company will not be required to sell the impaired debt security prior to recovery of its amortized cost basis, the credit component of the unrealized loss of the impaired AFS debt security is recognized as an allowance for credit losses, with a corresponding Provision for credit losses on the Consolidated Statement of Income and the non-credit component is recognized in Other comprehensive income (loss) on the Consolidated Statement of Comprehensive Income, net of applicable taxes. At each reporting period, the Company increases or decreases the allowance for credit losses as appropriate, while limiting reversals of the allowance for credit losses to the extent of the amounts previously recorded. If the Company intends to sell the impaired debt security or it is more-likely-than-not that the Company will be required to sell the impaired debt security prior to recovering its amortized cost basis, the entire impairment amount is recognized as an adjustment to the debt security’s amortized cost basis, with a corresponding Provision for credit losses on the Consolidated Statement of Income. The amortized cost of the Company’s AFS debt securities excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election to not recognize an allowance for credit losses for accrued interest receivables on AFS debt securities as the Company reverses any accrued interest if a debt security is impaired. As each AFS debt security has a unique security structure, where the accrual status is clearly determined when certain criteria listed in the terms are met, the Company assesses the default status of each security as defined by the debt security’s specific security structure. Other-Than-Temporary Impairment Assessment on AFS Debt Securities Prior to the Adoption of the CECL Guidance, Applicable for the Year Ended December 31, 2019 — For each reporting period, debt securities classified as either AFS or held-to-maturity debt securities that were in an unrealized loss position were analyzed as part of the Company’s ongoing OTTI assessment. The initial indicator of OTTI was a decline in fair value below the amortized cost of the debt security. In determining whether OTTI had occurred, the Company considered the severity and duration of the decline in fair value, the length of time expected for recovery, the financial condition of the issuer, changes in the debt securities’ ratings and other qualitative factors, as well as whether the Company either planned to sell the debt security or it was more-likely-than-not that it would be required to sell the debt security before recovery of the amortized cost. When the Company did not intend to sell the impaired debt security and it was more-likely-than-not that the Company would not be required to sell the impaired debt security prior to recovery of its amortized cost basis, the credit component of an OTTI of the impaired debt security was recognized as OTTI loss on the Consolidated Statement of Income and the non-credit component was recognized in other comprehensive income. This applied for both AFS and held-to-maturity debt securities. If the Company intended to sell the impaired debt security or it was more-likely-than-not that the Company would be required to sell the impaired debt security prior to recovery of its amortized cost basis, the full amount of the impairment loss (equal to the difference between the debt security’s amortized cost basis and its fair value at the balance sheet date) was recognized as OTTI loss on the Consolidated Statement of Income. Following the recognition of OTTI, the debt security’s new amortized cost basis was the previous basis minus the OTTI amount recognized in earnings. Allowance for Collateral-Dependent Financial Assets — A financial asset is considered collateral-dependent if repayment is expected to be provided substantially through the operation or sale of the collateral. The allowance for credit losses is measured on an individual basis for collateral-dependent financial assets and determined by comparing the fair value of the collateral, minus the cost to sell, to the amortized cost basis of the related financial asset at the reporting date. Other than loans, collateral-dependent financial assets could also include resale agreements. In arrangements which the borrower must continually adjust the collateral securing the asset to reflect changes in the collateral’s fair value (e.g., resale agreements), the Company estimates the expected credit losses on the basis of the unsecured portion of the amortized cost as of the balance sheet date. If the fair value of the collateral is equal to or greater than the amortized cost of the resale agreement, the expected losses would be zero. If the fair value of the collateral is less than the amortized cost of the asset, the expected losses are limited to the difference between the fair value of the collateral and the amortized cost basis of the resale agreement. Allowance for Purchased Credit Deteriorated Assets — ASU 2016-13 replaces the concept of purchased credit impaired (“PCI”) accounting under ASC 310-30 Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality with the concept of purchased financial assets with credit deterioration. The Company adopted ASU 2016-13 using the prospective transition approach for Purchased Credit Deteriorated (“PCD”) assets that were previously classified as PCI assets. PCD financial assets are defined as acquired individual financial assets (or groups with similar risk characteristics) that as of the date of acquisition, have experienced a more-than-insignificant deterioration in credit quality since origination. For PCD debt securities and PCD loans, the company records the allowance for credit losses by grossing up the initial amortized cost, which includes the purchase price and the allowance for credit losses. The expected credit losses of PCD debt securities are measured at the individual security level. The expected credit losses for PCD loans are measured based on the loan’s unpaid principal balance. Beginning January 1, 2020, for any asset designated as a PCD asset at the time of acquisition, the Company estimates and records an allowance for credit losses, which is added to the purchase price to establish the initial amortized cost basis of the financial asset. Hence, there is no income statement impact from the acquisition. Subsequent changes in the allowance for credit losses on PCD assets will be recognized in Provision for credit losses on the Consolidated Statement of Income. The non-credit discount or premium will be accreted to interest income based on the effective interest rate on the PCD assets determined after the gross-up for the allowance for credit losses. Allowance for Credit Losses Prior to the Adoption of the CECL Guidance, Applicable for the Year Ended December 31, 2019 — Prior to CECL adoption, the allowance of credit losses represented the Company’s estimate of probable credit losses inherent in the lending activities, and consisted of general and specific reserves. Impaired loans were subject to specific reserves. Non-impaired loans were evaluated as part of the general reserve. General reserves were calculated by utilizing both quantitative and qualitative factors. There were different qualitative risks for the loans in each portfolio segment. Predominant risk characteristics of the CRE, multifamily, single-family residential, and HELOC loans considered the collateral and geographic locations of the properties collateralizing the loans. Predominant risk characteristics of the C&I loans included cash flows, debt service and collateral of the borrowers and guarantors, as well as the economic and market conditions. Impaired Loans Prior to the Adoption of the CECL Guidance, Applicable for the Years Ended December 31, 2019 — Impaired loans were identified and evaluated for impairment on an individual basis. A loan was considered impaired when, based on current information and events, it was probable that the Company would not be able to collect all scheduled payments of principal or interest due in accordance with the original contractual terms of the loan agreement. Factors considered by management in determining and measuring loan impairment included payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Impaired loans were measured based on the present value of expected future cash flows discounted at a designated discount rate or, as appropriate, at the loan’s observable market price or the fair value of the collateral, if the loan was collateral dependent, less cost to sell. Purchased Credit-Impaired Loans Prior to the Adoption of the CECL Guidance, Applicable for the Year Ended December 31, 2019 — Acquired loans were recorded at fair value as of acquisition date in accordance with ASC 805, Business Combinations . A purchased loan was deemed to be credit impaired when there was evidence of credit deterioration since its origination and it was probable at the acquisition date that the Company would be unable to collect all contractually required payments and was accounted for under ASC 310-30, Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality . Under ASC 310-30, loans were recorded at fair value at acquisition date, factoring in credit losses expected to be incurred over the life of the loan. Accordingly, an allowance for loan losses was not carried over or recorded as of the acquisition date.
Variable Interest and Voting Interest Entities	Variable Interest and Voting Interest Entities — The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity (“VIE”). We first determine whether or not we have variable interests in the entity, which are investments or other interests that absorb portions of an entity’s expected losses or receive portions of the entity’s expected returns. If it is determined that we do not have a variable interest in the entity, no further analysis is required and the entity is not consolidated. A VIE is an entity that lacks equity investors or whose equity investors do not have a controlling financial interest in the entity through their equity investments. The Company consolidates a VIE if it has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. For entities that do not meet the definition of a VIE, the entity is considered a voting interest entity. We consolidate these entities if we can exert control over the financial and operating policies of an investee, which can occur if we have a 50% or more voting interest in the entity.
Investments in Qualified Affordable Housing Partnerships And Investments in Tax Credit and Other Investments, Net	Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net — The Company records the 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 Income tax expense on the Consolidated Statement of Income . The Company records investments in tax credit and other investments, net, using either the equity method, cost method of accounting or the measurement alternative method of accounting. The tax credits are recognized on the Consolidated Financial Statements to the extent they are utilized on the Company’s income tax returns in the year the credit arises under the flow-through method of accounting. The investments are reviewed for impairment on an annual basis or on an interim basis, if an event occurs that would trigger potential impairment. The Company records its investments in qualified affordable housing partnerships using the proportional amortization method if the investments meet certain criteria. 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 Income tax expense on the Consolidated Statement of Income.
Premises and Equipment, Net	Premises and Equipment, Net — The Company’s premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed based on the straight-line method over the estimated useful lives of the various classes of assets. The ranges of estimated useful lives for the principal classes of assets are as follows: Premises and Equipment Useful Lives Buildings 25 years Furniture, fixtures and equipment, and building improvements 3 to 7 years Leasehold improvements Term of lease or useful life, whichever is shorter The Company reviews its long-lived assets for impairment annually, or when events or changes in circumstances indicate that the carrying amounts of these assets may not be recoverable. An asset is considered impaired when the fair value, which is the expected undiscounted cash flows over the remaining useful life, is less than the net book value. The excess of the net book value over its fair value is charged as impairment loss to noninterest expense.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets — Goodwill represents the excess of the purchase price over the fair value of net assets acquired in an acquisition. Goodwill is tested for impairment on an annual basis as of December 31, or more frequently as events occur or circumstances change that indicate a potential impairment at the reporting unit level. The Company assesses goodwill for impairment at each operating segment level. The Company organizes its operations into three reporting segments: (1) Consumer and Business Banking; (2) Commercial Banking; and (3) Other. For information on how the reporting units are identified and the components are aggregated, see Note 17 — Business Segments to the Consolidated Financial Statements in this Form 10-K. The Company has the option to perform a qualitative assessment of goodwill or elect to bypass the qualitative test and proceed directly to a quantitative test. If the Company performs a qualitative assessment of goodwill to test for impairment and concludes it is more likely than not that a reporting unit’s fair value is greater than its carrying value, quantitative tests are not required. If the qualitative analysis indicates that it is more likely than not that a reporting unit’s fair value is less than its carrying value, the Company is required to perform a quantitative assessment to determine if there is goodwill impairment. Factors considered in the qualitative assessments include but are not limited to macroeconomic conditions, industry and market considerations, financial performance of the respective operating segment and other reporting unit specific considerations. The Company uses a combined income and market approach in its quantitative valuation methodologies. A quantitative valuation involves determining the fair value of each reporting unit and comparing the fair value to its corresponding carrying value. Goodwill impairment loss is recorded as a charge to noninterest expense and an adjustment to the carrying value of goodwill. Subsequent reversals of goodwill impairment are not allowed. Other intangible assets are mainly comprised of core deposit intangibles and are included in Other assets on the Consolidated Balance Sheet. Core deposit intangibles represent the intangible value of depositor relationships resulting from deposits assumed in various acquisitions. Core deposit intangibles are amortized over the projected useful lives of the deposits, which is between eight oninterest expense to the extent that the carrying value exceeds the estimated fair value.
Derivatives	Derivatives — As part of its asset and liability management strategy, the Company uses derivative financial instruments to mitigate exposure to interest rate and foreign currency risks, and to assist customers with their risk management objectives. Derivatives utilized by the Company include primarily swaps, forwards and option contracts. Derivative instruments are included in Other assets or Accrued expenses and other liabilities on the Consolidated Balance Sheet at fair value. The related cash flows are recognized on the Cash flows from operating activities section on the Consolidated Statement of Cash Flows. The Company uses its accounting hedges based on the exposure being hedged as either fair value hedges, cash flow hedges or hedges of the net investments in certain foreign operations. For fair value hedges of interest rate risk, changes in fair value of derivatives are reported within Interest expense on the Consolidated Statement of Income. Changes in fair value of derivatives designated as hedges of the net investments in foreign operations are recorded as a component of AOCI. For cash flow hedges of floating-rate interest payments, the change in the fair value of hedges is recognized in AOCI on the Consolidated Balance Sheet and reclassified to earnings in the same period when the hedged cash flows impact earnings. Reclassified gains and losses of cash flow hedges are recorded in the same line item as the hedged interest payment within Interest expense on the Consolidated Statements of Income. All derivatives designated as fair value hedges and hedges of the net investments in certain foreign operations are linked to specific hedged items or to groups of specific assets and liabilities on the Consolidated Balance Sheet. Cash flow hedges are linked to the forecasted transactions related to a recognized asset or liability. To qualify as an accounting hedge under the hedge accounting rules (versus an economic hedge where hedge accounting is not sought), a derivative must be highly effective in offsetting the risk designated as being hedged. The Company formally documents its hedging relationships at inception, including the identification of the hedging instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction at the time the derivative contract is executed. Subsequent to inception, on a quarterly basis, the Company assesses whether the derivatives used in hedging transactions are highly effective in offsetting changes in the fair value of the hedged items or the cash flows of attributable hedged risks. Retrospective effectiveness is also assessed, as well as the continued expectation that the hedge will remain effective prospectively. The Company discontinues hedge accounting prospectively when (i) a derivative is no longer highly effective in offsetting changes in fair value; (ii) a derivative expires, or is sold, terminated or exercised, or (iii) the Company determines that designation of a derivative as a hedge is no longer appropriate. If a fair value hedge is discontinued, the derivative will continue to be recorded on the Consolidated Balance Sheet at fair value with changes in fair value recognized on the Consolidated Statement of Income. When the hedged net investment is either sold or substantially liquidated, changes in the fair value of the derivatives are reclassified out of AOCI into Foreign exchange income on the Consolidated Statement of Income. If a cash flow hedge is discontinued, the derivative net gain or loss will remain in AOCI and reclassified into earnings in the periods in which the hedged forecasted cash flow affects earnings. The Company also offers various interest rate, foreign currency, and energy commodity derivative products to customers. These transactions are not linked to specific assets or liabilities on the Consolidated Balance Sheet or to forecasted transactions in a hedging relationship and, therefore, do not qualify for hedge accounting. These contracts are recorded at fair value with changes in fair value recorded in Interest rate contracts and other derivative income and Foreign exchange income on the Consolidated Statement of Income. As part of the Company’s loan origination process, from time to time, the Company obtains equity warrants to purchase preferred and/or common stock of public or private companies it provides loans to. These equity warrants are accounted for as derivatives and recorded at fair value included in Other assets on the Consolidated Balance Sheet with changes in fair value recorded on the Consolidated Statement of Income. The Company is exposed to counterparty credit risk, which is the risk that counterparties to the derivative contracts do not perform as expected. Valuation of derivative assets and liabilities reflect the value of the instrument inclusive of the nonperformance risk. The Company uses master netting arrangements to mitigate counterparty credit risk in derivative transactions. To the extent the derivatives are subject to master netting arrangements, the Company takes into account the impact of master netting arrangements that allow the Company to settle all derivative contracts executed with the same counterparty on a net basis, and to offset the net derivative position with the related cash and securities collateral. The Company elected to offset derivative transactions with the same counterparty on the Consolidated Balance Sheet when a derivative transaction has a legally enforceable master netting arrangement and when it is eligible for netting under ASC 210-20-45-1, Balance Sheet Offsetting: Netting Derivative Positions on Balance Sheet. Derivative balances and related cash collateral are presented net on the Consolidated Balance Sheet. In addition, the Company applied the Settlement to Market treatment for the cash collateralizing our interest rate and commodity contracts with certain centrally cleared counterparties. As a result, derivative balances with these counterparties are considered settled by the collateral.
Fair Value	Fair Value — Fair value is defined as the price that would be received to sell an asset or the price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date and, in many cases, requires management to make a number of significant judgments. Fair value measurements are based on the exit price notion and are determined by maximizing the use of observable inputs. However, for certain instruments, we must utilize unobservable inputs in determining fair value due to the lack of observable inputs in the market, which requires greater judgment in the measurement of fair value. Based on the inputs used in the valuation techniques, the Company classifies its assets and liabilities measured and disclosed at fair value in accordance with a three-level hierarchy (i.e., Level 1, Level 2 and Level 3) established under ASC 820, Fair Value Measurements . The Company records certain financial instruments, such as AFS debt securities, and derivative assets and liabilities, at fair value on a recurring basis. Certain financial instruments, such as impaired loans and loans held-for-sale, are not carried at fair value each period but may require nonrecurring fair value adjustments due to lower-of-cost-or-market accounting or write-downs of individual assets. For additional information on fair value, see Note 2 — Fair Value Measurement and Fair Value of Financial Instruments to the Consolidated Financial Statements in this Form 10-K.
Stock-Based Compensation	Stock-Based Compensation — The Company issues stock-based awards to eligible employees, officers and directors, and accounts for the related costs in accordance with the provisions of ASC 505, Equity and ASC 718, Compensation — Stock Compensation . Stock-based compensation cost is measured at the grant date based on the fair value of the awards and expensed over the employee’s requisite service period. The Company grants restricted stock units (“RSUs”), which include service conditions for vesting. Additionally, some of the Company’s RSUs contain performance goals and market conditions that are required to be met in order for the awards to vest. RSUs cliff vest after three years of continued employment from the date of the grant. RSUs are authorized to settle predominantly in shares of the Company’s common stock. Compensation cost for those awards is based on the quoted market price of the Company’s common stock at the grant date. Certain RSUs will be settled in cash, which subjects these RSUs to variable accounting whereby the compensation cost is adjusted to fair value based on changes in the Company’s stock price up to the settlement date. Compensation cost is amortized on a straight-line basis over the requisite service period for the entire award, which is generally the maximum vesting period of the award. Excess tax benefits and deficiencies on share-based payment awards are recognized within Income tax expense on the Consolidated Statement of Income. For time-based RSUs, the grant-date fair value is measured at the fair value of the Company’s common stock as if the RSUs are vested and issued on the date of grant. For performance-based RSUs, the grant-date fair value considers both performance and market conditions. As stock-based compensation expense is estimated based on awards ultimately expected to vest, it is reduced by the expense related to awards expected to be forfeited. Forfeitures are estimated at the time of grant and are updated quarterly. If the estimated forfeitures are revised, a cumulative effect of changes in estimated forfeitures for the current and prior periods is recognized in compensation expense in the period of change. For performance-based RSUs, the compensation expense fluctuates based on the estimated outcome of meeting the performance conditions. The Company evaluates the probable outcome of the performance conditions quarterly and makes cumulative adjustments for current and prior periods in compensation expense in the period of change. Market conditions subsequent to the grant date have no impact on the amount of compensation expense the Company will recognize over the life of the award. Refer to Note 13 — Stock Compensation Plans on the Consolidated Financial Statements in this Form 10-K for additional information. Compensation costs are calculated using the quoted market price of the Company’s common stock at the grant date. Compensation costs for certain time-based awards that will be settled in cash are adjusted to fair value based on changes in the share price of the Company’s common stock up to the settlement date. For performance-based RSUs, the compensation costs are based on grant date fair value which considers both performance and market conditions, and is subject to subsequent adjustments based on the Company’s outcome in meeting the performance criteria at the end of the performance period. Compensation costs of both time- and performance-based awards are estimated based on awards ultimately expected to vest, and recognized net of estimated forfeitures on a straight-line basis from the grant date until the vesting date of each grant. For accounting on stock-based compensation plans, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Stock-Based Compensation to the Consolidated Financial Statements in this Form 10-K for additional information.
Revenue Recognition	Revenue from Contracts with Customers — The Company recognizes two primary types of revenue on its Consolidated Statement of Income: Net interest income and Noninterest income . The Company’s revenue from contracts with customers consists of service charges and fees related to deposit accounts, card income and wealth management fees. These revenue streams as described below comprised 35%, 29% and 26% of total noninterest income for the years ended December 31, 2021, 2020 and 2019, respectively. • Deposit Service Charges and Related Fee Income — The Company offers a range of deposit products to individuals and businesses, which includes savings, money market, checking and time deposit accounts. The deposit account services include ongoing account maintenance, as well as certain optional services such as various in-branch services, automated teller machine/debit card usage, wire transfer services or check orders. In addition, treasury management and business account analysis services are offered to commercial deposit customers. The monthly account fees may vary with the amount of average monthly deposit balances maintained, or the Company may charge a fixed monthly account maintenance fee if certain average balances are not maintained. In addition, each time a deposit customer selects an optional service, the Company may earn transaction fees, generally recognized by the Company at the point when the transaction occurs. For business analysis accounts, commercial deposit customers receive an earnings credit based on their account balance, which can be used to offset the cost of banking and treasury management services. Business analysis accounts that are assessed fees in excess of earnings credits received are typically charged at the end of each month, after all transactions are known and the credits are calculated. Deposit service charge and related fee income are recognized in all operating segments. • Card Income — Card income consists of merchant referral fees and interchange income. For merchant referral fees, the Company provides marketing and referral services to acquiring banks for merchant card processing services and earns variable referral fees based on transaction activities. The Company satisfies its performance obligation over time as the Company identifies, solicits, and refers business customers who are provided such services. The Company receives monthly fees net of consideration it pays to the acquiring bank performing the merchant card processing services. The Company recognizes revenue on a monthly basis when the uncertainty associated with the variable referral fees is resolved after the Company receives monthly statements from the acquiring bank. For interchange income, the Company, as a card issuer, has a stand ready performance obligation to authorize, clear, and settle card transactions. The Company earns or pays interchange fees, which are percentage-based on each transaction, and based on rates published by the corresponding payment network for transactions processed using their network. The Company measures its progress toward the satisfaction of its performance obligation over time as services are rendered, and the Company provides continuous access to this service and settles transactions as its customer or the payment network requires. Interchange income is presented net of direct costs paid to the customer and entities in their distribution chain, which are transaction-based expenses such as rewards program expenses and certain network costs. Revenue is recognized when the net profit is determined by the payment networks at the end of each day. Card income is recognized in consumer and business banking, and commercial banking segments. • Wealth Management Fees — The Company provides investment planning services for customers including wealth management services, asset allocation strategies, portfolio analysis and monitoring, investment strategies and risk management strategies. The fees the Company earns are variable and are generally received monthly. The Company recognizes revenue for the services performed at quarter-end based on actual transaction details received from the broker-dealer the Company engages. Wealth management fees is recognized in consumer and business banking, and commercial banking segments.
Income Taxes	Income Taxes — The Company files consolidated federal income tax returns, foreign tax returns, and various combined and separate company state tax returns. The calculation of the Company’s income tax provision and related tax accruals requires the use of estimates and judgments. Income tax expense consists of two components: current and deferred. Current tax expense represents taxes to be paid or refunded for the current period and includes income tax expense related to our uncertain tax positions. Income tax liabilities (receivables) represent the estimated amounts due to (due from) the various taxing jurisdictions where the Company has established a tax presence and are reported in Accrued expenses and other liabilities or Other assets on the Consolidated Balance Sheets. Deferred tax expense results from changes in deferred tax assets and liabilities between period, and is determined using the balance sheet method. Under the balance sheet method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax basis of assets and liabilities. Deferred tax assets are also recognized for tax attributes such as net operating loss carryforwards and tax credit carryforwards. Management regularly reviews the Company’s tax positions and deferred tax balances. Factors considered in this analysis include the Company’s ability to generate future taxable income, implement tax-planning strategies (as defined in ASC 740, Income Taxes ) and utilize taxable income from prior carryback years (if such carryback is permitted under the applicable tax law), as well as future reversals of existing taxable temporary differences. To the extent a deferred tax asset is no longer expected more-likely-than-not to be realized, a valuation allowance is established. Deferred tax assets net of deferred tax liabilities are included in Other assets on the Consolidated Balance Sheet. See Note 11 — Income Taxes to the Consolidated Financial Statements in this Form 10-K for a discussion of management’s assessment of evidence considered by the Company in establishing a valuation allowance. The Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken, or expected to be taken, in an income tax return. Uncertain tax positions that meet the more-likely-than-not recognition threshold are measured to determine the amount of benefit to recognize. An uncertain tax position is measured at the largest amount of benefit that management believes has a greater than 50% likelihood of realization upon settlement. Tax benefits not meeting our realization criteria represent unrecognized tax benefits. The Company establishes a liability for potential taxes, interest and penalties related to uncertain tax positions based on facts and circumstances, including the interpretation of existing law, new judicial or regulatory guidance, and the status of tax audits.
Earnings Per Share	Earnings Per Share — 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 any incremental dilutive common share equivalents calculated for outstanding RSUs using the treasury stock method.
Foreign Currency Translation	Foreign Currency Translation — The Company’s foreign subsidiary in China, East West Bank (China) Limited’s functional currency is in Chinese Renminbi (“RMB”). As a result, assets and liabilities of East West Bank (China) Limited are translated, for the consolidation purpose, from its functional currency into U.S. dollar (“USD”) using period-end spot foreign exchange rates. Revenues and expenses of East West Bank (China) Limited are translated, for the purpose of consolidation, from its functional currency into USD at the transaction date foreign exchange rates. The effects of those translation adjustments are reported in the Foreign currency translation adjustments account within Other comprehensive income (loss) on the Consolidated Statement of Comprehensive Income, net of any related hedged effects. For transactions that are denominated in a currency other than the functional currency, including transactions denominated in the local currencies of foreign operations that use the USD as their functional currency, the effects of changes in exchange rates are reported in Foreign exchange income on the Consolidated Statement of Income.
New Accounting Pronouncements Adopted and Recent Accounting Pronouncements	New Accounting Pronouncements Adopted in 2021 Standard Required Date of Adoption Description Effect on Financial Statements Standards Adopted in 2021 ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes January 1, 2021 Early adoption is permitted on January 1, 2020. This ASU simplifies the accounting for income taxes by removing certain exceptions to the existing guidance. This includes removing exceptions to: 1) the incremental approach for intraperiod tax allocation, 2) the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment, 3) the ability not to recognize a deferred tax liability when a foreign equity method investment becomes a subsidiary, and 4) the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. In addition, this ASU simplifies the accounting for income taxes related to franchise taxes, the tax basis of goodwill and the method for recognizing an enacted change in tax laws. This ASU also specifies that an entity is not required to allocate the consolidated amount of tax expense to a legal entity that is not subject to tax in its separate financial statements. This ASU also makes improvements in the accounting for income taxes related to employee stock ownership plans and equity method investments in qualified affordable housing projects. This guidance should be applied on either a retrospective, modified retrospective or prospective basis depending on the amendments. The Company adopted this guidance on January 1, 2021 using the transition guidance prescribed by this ASU. At the time of adoption, this guidance did not have a material impact on the Company’s Consolidated Financial Statements. ASU 2020-01, Clarifying the Interactions between Investments —Equity Securities (Topic 321), Investments —Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) Effective for fiscal years beginning after December 15, 2020. ASU 2020-01 clarifies that when applying the measurement alternative in Topic 321, the existing investment must be remeasured at fair value as of the date that the observable transaction occurred. This guidance also clarifies that companies are not required to assess whether the underlying securities in certain forward contracts and purchased options would be accounted for under the equity method or fair value option when determining the method of accounting for those contracts. This guidance should be applied on a prospective basis. The Company adopted this standard on January 1, 2021. The adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and subsequent related ASU 2021-01, Reference Rate Reform (Topic 848): Scope Effective for all entities from the dates of issuance through December 31, 2022. In March 2020, the FASB issued an ASU related to contracts or hedging relationships that reference London Interbank Offered Rate (“LIBOR”) or other reference rates that are expected to be discontinued due to reference rate reform. This ASU provides temporary optional expedients and exceptions regarding the accounting requirements related to the modification of certain contracts, hedging relationships and other transactions that are affected by the reference rate reform. The guidance permits the Company to make a one-time election to sell and/or transfer qualifying held-to-maturity securities, and not to apply modification accounting or remeasure lease payments in lease contracts if the changes to the contract are related to the discontinuation of the reference rate. If certain criteria are met, the amendments also allow exceptions to the de-designation criteria of the hedging relationships and the assessment of hedge effectiveness during the transition period. This one-time election may be made at any time after March 12, 2020, but no later than December 31, 2022. In January 2021, the FASB issued ASU 2021-01, which expanded the scope of Topic 848 to include all affected derivatives and clarified certain optional expedients and exceptions regarding the hedge accounting for derivative contracts affected by the discounting transition. The amendments of this guidance could be elected retrospectively or prospectively to new modifications made on or after the date of issuance of this ASU, January 7, 2021. The Company adopted ASU 2020-04 and ASU 2021-01 on a prospective basis on January 1, 2021. At the time of adoption, the guidance did not have a material impact on the Company’s Consolidated Financial Statements. The Company will continue to track the exposure as of each reporting period and to assess the impact as the reference rate transition occurs through the cessation of LIBOR. Standard Required Date of Adoption Description Effect on Financial Statements Standards Adopted in 2021 ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables — Nonrefundable Fees and Other Costs January 1, 2021 Early adoption is The amendments in this ASU updates ASU 2017-08, Receivables — Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities , by clarifying that an entity should reevaluate whether a callable debt security is within the scope of paragraph 310-20-35-33 for each reporting period. If the security contained additional future call dates, an entity should consider whether the amortized cost basis exceeded the amount repayable by the issuer at the next call date. If so, the excess should be amortized to the next call date. This ASU also clarifies if there is no remaining premium or if there are no further call dates, the entity shall reset the effective yield using the payment terms of the debt security. The amendments of this guidance should be applied on a prospective basis as of the beginning of the period of adoption for existing or newly purchased callable debt securities. The Company adopted this guidance on a prospective basis on January 1, 2021. The adoption of this guidance did not have an impact on the Company’s Consolidated Financial Statements. ASU 2021-06, Presentation of Financial Statements ( Topic 205), Financial Services— Depository and Lending (Topic 942), and Financial Services —Investment Companies (Topic 946): Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and NO. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants Effective for all entities from the dates of issuance on August 9, 2021. ASU 2021-06 was issued to amend U.S. Securities and Exchange Commission (‘SEC”) paragraphs in the Accounting Standards Codification to reflect the issuance of SEC Release No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and No. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants. The Company adopted these disclosure requirements upon issuance of the ASU 2021-06
Fair Value Determination	Fair value is defined as the price that would be received to sell an asset or the price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. In determining the fair value of financial instruments, 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 an asset or a 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 described 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 prices derived from 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 traded in active markets; quoted prices for identical or similar instruments traded 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. The classification of assets and liabilities within the hierarchy is based on whether inputs to the valuation methodology used are observable or unobservable, and the significance of those inputs in the fair value measurement. 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.
Credit Quality Indicators	Credit Quality Indicators All loans are subject to the Company’s credit review and monitoring process. For the commercial loan portfolio, loans are risk rated based on an analysis of the borrower’s current payment performance or delinquency, repayment sources, financial and liquidity factors, including industry and geographic considerations. For a majority of the consumer loan portfolio, payment performance or delinquency is the driving indicator for the risk ratings. The Company utilizes internal credit risk ratings to assign each individual loan a risk rating of 1 through 10: • Pass — loans risk rated 1 through 5 are assigned an internal risk rating category of “Pass.” Loans risk rated 1 are typically loans fully secured by cash. Pass loans have sufficient sources of repayment to repay the loan in full, in accordance with all terms and conditions. • Special mention — loans assigned a risk rating of 6 have potential weaknesses that warrant closer attention by management; these are assigned an internal risk rating category of “Special Mention.” • Substandard — loans assigned a risk rating of 7 or 8 have well-defined weaknesses that may jeopardize the full and timely repayment of the loan; these are assigned an internal risk rating category of “Substandard.” • Doubtful — loans assigned a risk rating of 9 have insufficient sources of repayment and a high probability of loss; these are assigned an internal risk rating category of “Doubtful.” • Loss — loans assigned a risk rating of 10 are uncollectible and of such little value that they are no longer considered bankable assets; these are assigned an internal risk rating category of “Loss.” Loan exposures categorized as criticized consist of special mention, substandard, doubtful and loss categories. The Company reviews the internal risk ratings of its loan portfolio on a regular basis, and adjusts the ratings based on changes in the borrowers’ financial status and the collectability of the loans.
Allowance for Credit Losses	Allowance for Credit Losses The Company has an allowance framework under ASU 2016-13 for all financial assets measured at amortized cost and certain off-balance sheet credit exposures. The Company’s allowance for credit losses, which includes both the allowance for loan losses and the allowance for unfunded credit commitments, is calculated with the objective of maintaining a reserve sufficient to absorb losses inherent in our credit portfolios. The measurement of the allowance for credit losses is based on management’s best estimate of lifetime expected credit losses, and periodic evaluation of the loan portfolio, lending-related commitments and other relevant factors. The allowance for credit losses is deducted from the amortized cost basis of a financial asset or a group of financial assets so that the balance sheet reflects the net amount the Company expects to collect. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts, deferred fees and costs, and escrow advances. Subsequent changes in expected credit losses are recognized in net income as a provision for, or a reversal of, credit loss expense. The allowance for credit losses estimation involves procedures to consider the unique risk characteristics of the portfolio segments. The majority of the Company’s credit exposures share risk characteristics with other similar exposures and are collectively evaluated. The collectively evaluated loans cover performing risk-rated loans and unfunded credit commitments. If an exposure does not share risk characteristics with other exposures, the Company generally estimates expected credit losses on an individual basis. These individually assessed loans include TDR and nonaccrual loans. Allowance for Collectively Evaluated Loans The allowance for collectively evaluated loans consists of a quantitative component that assesses the different risk factors considered in our models and a qualitative component that considers risk factors external to the models. Each of these components are described below. • Quantitative Component — The Company applies quantitative methods to estimate loan losses by considering a variety of factors such as historical loss experience, the current credit quality of the portfolio, and an economic outlook over the life of the loan. The Company incorporates forward-looking information using macroeconomic scenarios which include variables that are considered key drivers of increases and decreases in credit losses. The Company utilizes a probability-weighted, multiple-scenario forecast approach. These scenarios may consist of a base forecast representing management's view of the most likely outcome, combined with downside or upside scenarios reflecting possible worsening or improving economic conditions. The quantitative models incorporate a probability-weighted calculation of these macroeconomic scenarios over a reasonable and supportable forecast period. If the life of the loans extends beyond the reasonable and supportable forecast period, the Company will consider historical experience or long-run macroeconomic trends over the remaining lives of the loans to estimate the allowance for loan losses. For the year ended December 31, 2021, the reasonable and supportable forecast period, key credit risk characteristics and macroeconomic variables to estimate the expected credit losses of the C&I segment were modified due to model enhancement. There were no changes to the overall model methodology. For the year ended December 31, 2020, there were no changes to the reasonable and supportable forecast period, and reversion to historical loss experience method. The following table provides key credit risk characteristics and macroeconomic variables that the Company uses to estimate the expected credit losses by portfolio segment: Portfolio Segment Risk Characteristics Macroeconomic Variables C&I Age (1) , size and spread at origination, and risk rating Volatility Index (“VIX”) and BBB yield to 10-year U.S. Treasury spread (“BBB Spread”) (1) CRE, Multifamily residential, and Construction and land Delinquency status, maturity date, collateral value, property type, and geographic location Unemployment rate, Gross Domestic Product (“GDP”), and U.S. Treasury rates Single-family residential and HELOCs FICO score, delinquency status, maturity date, collateral value, and geographic location Unemployment rate, GDP, and home price index Other consumer Historical loss experience Immaterial (2) (1) Due to model enhancements, the risk characteristic related to “time-to-maturity” was changed to “age”; while macroeconomic variables related to “unemployment rate and two- and ten-year U.S. Treasury spread” were changed to “VIX and BBB Spread” during the year ended December 31, 2021. (2) Macroeconomic variables are included in the qualitative estimate. Allowance for Loan Losses for the Commercial Loan Portfolio The Company’s C&I lifetime loss rate model estimates credit losses by estimating a loss rate expected over the life of a loan. This loss rate is applied to the amortized cost basis, excluding accrued interest receivable, to determine expected credit losses. The lifetime loss rate model’s reasonable and supportable period spans 11 quarters, thereafter immediately reverting to the historical average loss rate, expressed through the loan-level lifetime loss rate. For CRE, multifamily residential, and construction and land loans, projected probability of defaults (“PDs”) and loss given defaults (“LGDs”) are applied to the estimated exposure at default, considering the term and payment structure of the loan, to generate estimates of expected loss at the loan level. The forecast of future economic conditions returns to long-run historical economic trends within the reasonable and supportable period. In order to estimate the life of a loan under both models, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. Allowance for Loan Losses for the Consumer Loan Portfolio For single-family residential and HELOC loans, projected PDs and LGDs are applied to the estimated exposure at default, considering the term and payment structure of the loan, to generate estimates of expected loss at the loan level. The forecast of future economic conditions returns to long-run historical economic trends after the reasonable and supportable period. In order to estimate the life of a loan for the single-family residential and HELOC portfolios, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. For other consumer loans, the Company uses a loss rate approach. • Qualitative Component — The Company also considers the following qualitative factors in the determination of the collectively evaluated allowance, if these factors have not already been captured by the quantitative model. Such qualitative factors may include, but are not limited to: – Loan growth trends; – The volume and severity of past due financial assets, and the volume and severity of adversely classified financial assets; – The Company’s lending policies and procedures, including changes in lending strategies, underwriting standards, collection, write-off and recovery practices; – Knowledge of a borrower’s operations; – The quality of the Company’s credit review system; – The experience, ability and depth of the Company’s management, lending associates and other relevant associates; – The effect of other external factors such as the regulatory and legal environments and changes in technology; – Actual and expected changes in international, national, regional, and local economic and business conditions in which the Company operates; and – Risk factors in certain industry sectors not captured by the quantitative models. The magnitude of the impact of these factors on the Company’s qualitative assessment of the allowance for credit losses changes from period to period according to changes made by management in its assessment of these factors. The extent to which these factors change may be dependent on whether they are already reflected in quantitative loss estimates during the current period and the extent to which changes in these factors diverge from period to period. While the Company’s allowance methodologies strive to reflect all relevant credit risk factors, there continues to be uncertainty associated with, but not limited to, potential imprecision in the estimation process due to the inherent time lag of obtaining information and normal variations between expected and actual outcomes. The Company may hold additional qualitative reserves that are designed to provide coverage for losses attributable to such risk. Allowance for Individually Evaluated Loans When a loan no longer shares similar risk characteristics with other loans, such as in the case of certain nonaccrual or TDR loans, the Company estimates the allowance for loan losses on an individual loan basis. The allowance for loan losses for individually evaluated loans is measured as the difference between the recorded value of the loans and their fair value. For loans evaluated individually, the Company uses one of three different asset valuation measurement methods: (1) the fair value of collateral less costs to sell; (2) the present value of expected future cash flows; or (3) the loan's observable market price. If an individually evaluated loan is determined to be collateral dependent, the Company applies the fair value of the collateral less costs to sell method. If an individually evaluated loan is determined not to be collateral dependent, the Company uses the present value of future cash flows or the observable market value of the loan. • Collateral-Dependent Loans —
Variable Interest Entity (VIEs)	Variable Interest Entities The Company invests in unconsolidated limited partnerships and similar entities that construct, own and operate affordable housing, historic rehabilitation, wind and solar projects, of which the majority of such investments are VIEs. As a limited partner in these partnerships, these investments are designed to generate a return primarily through the realization of federal tax credits and tax benefits. An unrelated third party is typically the general partner or managing member who has control over the significant activities of such investments. While the Company’s interest in some of the investments may exceed 50% of the outstanding equity interests, the Company does not consolidate these structures due to the general partner or managing member’s ability to manage the entity, which is indicative of power over them. The Company’s expected maximum exposure to loss in connection with these partnerships consist of the unamortized investment balance and any tax credits claimed that may be subject to recapture. Special purpose entities formed in connection with securitization transactions are generally considered VIEs. A CLO is a VIE that manages a pool of assets consisting primarily of broadly syndicated corporate loans, where multiple tranches of notes are issued to investors . The Company served as the collateral manager of a CLO that closed in 2019 and subsequently sold its portfolio management contract in 2020 but retained the top three investment grade-rated tranches, which had a carrying amount of $291.7 million and $287.5 million as of December 31, 2021 and 2020 , respectively.
BalanceSheetOffsetting	The Company’s resale and repurchase agreements are transacted under legally enforceable master netting agreements that, in the event of default by the counterparty, provide the Company the right to liquidate assets 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 Sheet when it has a legally enforceable master netting agreement and the transactions are eligible for netting under ASC 210-20-45-11, Balance Sheet Offsetting: Repurchase and Reverse Repurchase Agreements
Litigation	Litigation — The Company is a party to various legal actions arising in the normal course of doing business. In accordance with ASC 450, Contingencies , the Company accrues reserves for outstanding lawsuits, claims and proceedings when a loss contingency is probable and can be reasonably estimated. The Company estimates the amount of loss contingencies using current available information from legal proceedings, advice from legal counsel and available insurance coverage. Due to the inherent subjectivity of the assessments and unpredictability of the outcomes of the legal proceedings, any amounts accrued or included in this aggregate amount may not represent the ultimate loss to the Company from the legal proceedings in question. Thus, the Company’s exposure and ultimate losses may be higher, and possibly significantly more than the amounts accrued.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Schedule of useful lives for premises and equipment	The ranges of estimated useful lives for the principal classes of assets are as follows: Premises and Equipment Useful Lives Buildings 25 years Furniture, fixtures and equipment, and building improvements 3 to 7 years Leasehold improvements Term of lease or useful life, whichever is shorter
Schedule of new accounting pronouncements adopted and recent accounting pronouncements	New Accounting Pronouncements Adopted in 2021 Standard Required Date of Adoption Description Effect on Financial Statements Standards Adopted in 2021 ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes January 1, 2021 Early adoption is permitted on January 1, 2020. This ASU simplifies the accounting for income taxes by removing certain exceptions to the existing guidance. This includes removing exceptions to: 1) the incremental approach for intraperiod tax allocation, 2) the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment, 3) the ability not to recognize a deferred tax liability when a foreign equity method investment becomes a subsidiary, and 4) the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. In addition, this ASU simplifies the accounting for income taxes related to franchise taxes, the tax basis of goodwill and the method for recognizing an enacted change in tax laws. This ASU also specifies that an entity is not required to allocate the consolidated amount of tax expense to a legal entity that is not subject to tax in its separate financial statements. This ASU also makes improvements in the accounting for income taxes related to employee stock ownership plans and equity method investments in qualified affordable housing projects. This guidance should be applied on either a retrospective, modified retrospective or prospective basis depending on the amendments. The Company adopted this guidance on January 1, 2021 using the transition guidance prescribed by this ASU. At the time of adoption, this guidance did not have a material impact on the Company’s Consolidated Financial Statements. ASU 2020-01, Clarifying the Interactions between Investments —Equity Securities (Topic 321), Investments —Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) Effective for fiscal years beginning after December 15, 2020. ASU 2020-01 clarifies that when applying the measurement alternative in Topic 321, the existing investment must be remeasured at fair value as of the date that the observable transaction occurred. This guidance also clarifies that companies are not required to assess whether the underlying securities in certain forward contracts and purchased options would be accounted for under the equity method or fair value option when determining the method of accounting for those contracts. This guidance should be applied on a prospective basis. The Company adopted this standard on January 1, 2021. The adoption of this guidance did not have a material impact on the Company’s Consolidated Financial Statements. ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and subsequent related ASU 2021-01, Reference Rate Reform (Topic 848): Scope Effective for all entities from the dates of issuance through December 31, 2022. In March 2020, the FASB issued an ASU related to contracts or hedging relationships that reference London Interbank Offered Rate (“LIBOR”) or other reference rates that are expected to be discontinued due to reference rate reform. This ASU provides temporary optional expedients and exceptions regarding the accounting requirements related to the modification of certain contracts, hedging relationships and other transactions that are affected by the reference rate reform. The guidance permits the Company to make a one-time election to sell and/or transfer qualifying held-to-maturity securities, and not to apply modification accounting or remeasure lease payments in lease contracts if the changes to the contract are related to the discontinuation of the reference rate. If certain criteria are met, the amendments also allow exceptions to the de-designation criteria of the hedging relationships and the assessment of hedge effectiveness during the transition period. This one-time election may be made at any time after March 12, 2020, but no later than December 31, 2022. In January 2021, the FASB issued ASU 2021-01, which expanded the scope of Topic 848 to include all affected derivatives and clarified certain optional expedients and exceptions regarding the hedge accounting for derivative contracts affected by the discounting transition. The amendments of this guidance could be elected retrospectively or prospectively to new modifications made on or after the date of issuance of this ASU, January 7, 2021. The Company adopted ASU 2020-04 and ASU 2021-01 on a prospective basis on January 1, 2021. At the time of adoption, the guidance did not have a material impact on the Company’s Consolidated Financial Statements. The Company will continue to track the exposure as of each reporting period and to assess the impact as the reference rate transition occurs through the cessation of LIBOR. Standard Required Date of Adoption Description Effect on Financial Statements Standards Adopted in 2021 ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables — Nonrefundable Fees and Other Costs January 1, 2021 Early adoption is The amendments in this ASU updates ASU 2017-08, Receivables — Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities , by clarifying that an entity should reevaluate whether a callable debt security is within the scope of paragraph 310-20-35-33 for each reporting period. If the security contained additional future call dates, an entity should consider whether the amortized cost basis exceeded the amount repayable by the issuer at the next call date. If so, the excess should be amortized to the next call date. This ASU also clarifies if there is no remaining premium or if there are no further call dates, the entity shall reset the effective yield using the payment terms of the debt security. The amendments of this guidance should be applied on a prospective basis as of the beginning of the period of adoption for existing or newly purchased callable debt securities. The Company adopted this guidance on a prospective basis on January 1, 2021. The adoption of this guidance did not have an impact on the Company’s Consolidated Financial Statements. ASU 2021-06, Presentation of Financial Statements ( Topic 205), Financial Services— Depository and Lending (Topic 942), and Financial Services —Investment Companies (Topic 946): Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and NO. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants Effective for all entities from the dates of issuance on August 9, 2021. ASU 2021-06 was issued to amend U.S. Securities and Exchange Commission (‘SEC”) paragraphs in the Accounting Standards Codification to reflect the issuance of SEC Release No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and No. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants. The Company adopted these disclosure requirements upon issuance of the ASU 2021-06

Fair Value Measurement and Fa_2

Fair Value Measurement and Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value, Financial Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Schedule of financial 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 December 31, 2021 and 2020: ($ in thousands) Assets and Liabilities Measured at Fair Value on a Recurring Basis Quoted Prices in Significant Significant Total AFS debt securities: U.S. Treasury securities $ 1,032,681 $ — $ — $ 1,032,681 U.S. government agency and U.S. government sponsored enterprise debt securities — 1,301,971 — 1,301,971 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities — 1,228,980 — 1,228,980 Residential mortgage-backed securities — 2,928,283 — 2,928,283 Municipal securities — 523,158 — 523,158 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 496,443 — 496,443 Residential mortgage-backed securities — 881,931 — 881,931 Corporate debt securities — 649,665 — 649,665 Foreign government bonds — 257,733 — 257,733 Asset-backed securities — 74,558 — 74,558 Collateralized loan obligations (“CLOs”) — 589,950 — 589,950 Total AFS debt securities $ 1,032,681 $ 8,932,672 $ — $ 9,965,353 Investments in tax credit and other investments: Equity securities $ 22,130 $ 4,474 $ — $ 26,604 Total investments in tax credit and other investments $ 22,130 $ 4,474 $ — $ 26,604 Derivative assets: Interest rate contracts $ — $ 240,222 $ — $ 240,222 Foreign exchange contracts — 21,033 — 21,033 Credit contracts — — — — Equity contracts — 5 215 220 Commodity contracts — 222,709 — 222,709 Gross derivative assets $ — $ 483,969 $ 215 $ 484,184 Netting adjustments (1) $ — $ (100,953) $ — $ (100,953) Net derivative assets $ — $ 383,016 $ 215 $ 383,231 Derivative liabilities: Interest rate contracts $ — $ 179,962 $ — $ 179,962 Foreign exchange contracts — 15,501 — 15,501 Credit contracts — 141 — 141 Commodity contracts — 194,567 — 194,567 Gross derivative liabilities $ — $ 390,171 $ — $ 390,171 Netting adjustments (1) $ — $ (232,727) $ — $ (232,727) Net derivative liabilities $ — $ 157,444 $ — $ 157,444 ($ in thousands) Assets and Liabilities Measured at Fair Value on a Recurring Basis Quoted Prices in Significant Significant Total AFS debt securities: U.S. Treasury securities $ 50,761 $ — $ — $ 50,761 U.S. government agency and U.S. government sponsored enterprise debt securities — 814,319 — 814,319 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities — 1,153,770 — 1,153,770 Residential mortgage-backed securities — 1,660,894 — 1,660,894 Municipal securities — 396,073 — 396,073 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 239,842 — 239,842 Residential mortgage-backed securities — 289,775 — 289,775 Corporate debt securities — 405,968 — 405,968 Foreign government bonds — 182,531 — 182,531 Asset-backed securities — 63,231 — 63,231 CLOs — 287,494 — 287,494 Total AFS debt securities $ 50,761 $ 5,493,897 $ — $ 5,544,658 Investments in tax credit and other investments: Equity securities $ 22,548 $ 8,724 $ — $ 31,272 Total investments in tax credit and other investments $ 22,548 $ 8,724 $ — $ 31,272 Derivative assets: Interest rate contracts $ — $ 489,132 $ — $ 489,132 Foreign exchange contracts — 30,300 — 30,300 Credit contracts — 13 — 13 Equity contracts — 585 273 858 Commodity contracts — 82,451 — 82,451 Gross derivative assets $ — $ 602,481 $ 273 $ 602,754 Netting adjustments (1) $ — $ (101,512) $ — $ (101,512) Net derivative assets $ — $ 500,969 $ 273 $ 501,242 Derivative liabilities: Interest rate contracts $ — $ 317,698 $ — $ 317,698 Foreign exchange contracts — 22,759 — 22,759 Credit contracts — 206 — 206 Commodity contracts — 84,165 — 84,165 Gross derivative liabilities $ — $ 424,828 $ — $ 424,828 Netting adjustments (1) $ — $ (184,697) $ — $ (184,697) Net derivative liabilities $ — $ 240,131 $ — $ 240,131 (1) Represents balance sheet netting of derivative assets and liabilities and related cash collateral under master netting agreements or similar agreements. See Note 5 — Derivatives to the Consolidated Financial Statements in this Form 10-K for additional information.
Reconciliation of the beginning and ending balances of equity contracts measured at fair value on a recurring basis using significant unobservable inputs (Level 3)	The following table provides a reconciliation of the beginning and ending balances of these equity contracts for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Equity Contracts Beginning balance $ 273 $ 421 $ 673 Total gains included in earnings (1) 32 8,225 563 Issuances 12 — 114 Settlements (96) — (929) Transfers out of Level 3 (2) (6) (8,373) — Ending balance $ 215 $ 273 $ 421 (1) Include both realized and unrealized gain (losses) recorded in Lending fees on the Consolidated Statement of Income. The unrealized (losses) gains were $(44) thousand, $8.2 million, and $(292) thousand for the years ended December 31, 2021, 2020 and 2019, respectively.
Schedule of quantitative information about significant unobservable inputs used in the valuation of level 3 fair value measurements	The following table presents quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements as of December 31, 2021 and 2020. The significant unobservable inputs presented in the table below are those that the Company considers significant to the fair value of the Level 3 assets. The Company considers unobservable inputs to be significant if, by their exclusion, the fair value of the Level 3 assets would be impacted by a predetermined percentage change. ($ in thousands) Fair Value Valuation Unobservable Range of Weighted- Average of Inputs (1) December 31, 2021 Derivative assets: Equity contracts $ 215 Black-Scholes option pricing model Equity volatility 44% — 54% 49% Liquidity discount 47% 47% December 31, 2020 Derivative assets: Equity contracts $ 273 Black-Scholes option pricing model Equity volatility 46% — 61% 53% Liquidity discount 47% 47% (1) Weighted-average of inputs is calculated based on the fair value of equity contracts as of December 31, 2021 and 2020.
Schedule of the carrying and fair value estimates per the fair value hierarchy of financial instruments measured on a nonrecurring basis	The following tables present the fair value estimates for financial instruments as of December 31, 2021 and 2020, excluding financial instruments recorded at fair value on a recurring basis as they are included in the tables presented elsewhere in this Note. The carrying amounts in the following tables are recorded on the Consolidated Balance Sheet under the indicated captions, except for accrued interest receivable and mortgage servicing rights which are included in Other assets , and accrued interest payable which is included in Accrued expenses and other liabilities . These financial assets and liabilities are measured at amortized cost basis on the Company’s Consolidated Balance Sheet. ($ in thousands) December 31, 2021 Carrying Level 1 Level 2 Level 3 Estimated Financial assets: Cash and cash equivalents $ 3,912,935 $ 3,912,935 $ — $ — $ 3,912,935 Interest-bearing deposits with banks $ 736,492 $ — $ 736,492 $ — $ 736,492 Resale agreements $ 2,353,503 $ — $ 2,335,901 $ — $ 2,335,901 Restricted equity securities, at cost $ 77,434 $ — $ 77,434 $ — $ 77,434 Loans held-for-sale $ 635 $ — $ 635 $ — $ 635 Loans held-for-investment, net $ 41,152,202 $ — $ — $ 41,199,599 $ 41,199,599 Mortgage servicing rights $ 5,706 $ — $ — $ 9,104 $ 9,104 Accrued interest receivable $ 159,833 $ — $ 159,833 $ — $ 159,833 Financial liabilities: Demand, checking, savings and money market deposits $ 45,388,550 $ — $ 45,388,550 $ — $ 45,388,550 Time deposits $ 7,961,982 $ — $ 7,966,116 $ — $ 7,966,116 FHLB advances $ 249,331 $ — $ 250,372 $ — $ 250,372 Repurchase agreements $ 300,000 $ — $ 310,525 $ — $ 310,525 Long-term debt $ 147,658 $ — $ 151,020 $ — $ 151,020 Accrued interest payable $ 11,435 $ — $ 11,435 $ — $ 11,435 ($ in thousands) December 31, 2020 Carrying Level 1 Level 2 Level 3 Estimated Financial assets: Cash and cash equivalents $ 4,017,971 $ 4,017,971 $ — $ — $ 4,017,971 Interest-bearing deposits with banks $ 809,728 $ — $ 809,728 $ — $ 809,728 Resale agreements $ 1,460,000 $ — $ 1,464,635 $ — $ 1,464,635 Restricted equity securities, at cost $ 83,046 $ — $ 83,046 $ — $ 83,046 Loans held-for-sale $ 1,788 $ — $ 1,788 $ — $ 1,788 Loans held-for-investment, net $ 37,770,972 $ — $ — $ 37,803,940 $ 37,803,940 Mortgage servicing rights $ 5,522 $ — $ — $ 8,435 $ 8,435 Accrued interest receivable $ 150,140 $ — $ 150,140 $ — $ 150,140 Financial liabilities: Demand, checking, savings and money market deposits $ 35,862,403 $ — $ 35,862,403 $ — $ 35,862,403 Time deposits $ 9,000,349 $ — $ 9,016,884 $ — $ 9,016,884 Short-term borrowings $ 21,009 $ — $ 21,009 $ — $ 21,009 FHLB advances $ 652,612 $ — $ 659,631 $ — $ 659,631 Repurchase agreements $ 300,000 $ — $ 317,850 $ — $ 317,850 Long-term debt $ 147,376 $ — $ 150,131 $ — $ 150,131 Accrued interest payable $ 11,956 $ — $ 11,956 $ — $ 11,956
Fair Value, Measurements, Nonrecurring
Fair Value, Financial Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Schedule of quantitative information about significant unobservable inputs used in the valuation of level 3 fair value measurements	The following table presents the quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements that are measured on a nonrecurring basis as of December 31, 2021 and 2020: ($ in thousands) Fair Value Valuation Unobservable Range of Weighted- (1) December 31, 2021 Loans held-for-investment $ 64,919 Discounted cash flows Discount 4% — 15% 7% $ 38,537 Fair value of collateral Discount 15% — 75% 41% $ 23,528 Fair value of property Selling cost 8% 8% December 31, 2020 Loans held-for-investment $ 104,783 Discounted cash flows Discount 3% — 15% 11% $ 22,207 Fair value of collateral Discount 10% — 26% 15% $ 15,879 Fair value of collateral Contract value NM NM $ 46,993 Fair value of property Selling cost 7% — 26% 10% Investments in tax credit and other investments, net $ 3,140 Individual analysis of each investment Expected future tax NM NM OREO $ 15,824 Fair value of property Selling cost 8% 8% NM — Not meaningful . (1) Weighted-average of inputs is based on the relative fair value of the respective assets as of December 31, 2021 and 2020.
Schedule of carrying amounts of assets that were still held and had fair value changes measured on a nonrecurring basis	The following tables present the carrying amounts of assets that were still held and had fair value adjustments measured on a nonrecurring basis as of December 31, 2021 and 2020: ($ in thousands) Assets Measured at Fair Value on a Nonrecurring Basis Quoted Prices in Significant Significant Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 102,349 $ 102,349 CRE: CRE — — 21,891 21,891 Total commercial — — 124,240 124,240 Consumer: Residential mortgage: HELOCs — — 2,744 2,744 Total consumer — — 2,744 2,744 Total loans held-for-investment $ — $ — $ 126,984 $ 126,984 Other nonperforming assets $ 391 $ — $ — $ 391 ($ in thousands) Assets Measured at Fair Value on a Nonrecurring Basis Quoted Prices in Significant Significant Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 143,331 $ 143,331 CRE: CRE — — 42,894 42,894 Total commercial — — 186,225 186,225 Consumer: Residential mortgage: HELOCs — — 1,146 1,146 Other consumer — — 2,491 2,491 Total consumer — — 3,637 3,637 Total loans held-for-investment $ — $ — $ 189,862 $ 189,862 Investments in tax credit and other investments, net $ — $ — $ 3,140 $ 3,140 OREO (1) $ — $ — $ 15,824 $ 15,824 (1) Amounts are included in Other assets on the Consolidated Balance Sheet and represent the carrying value of OREO properties that were written down subsequent to their initial classification as OREO.
Schedule of increase (decrease) in fair value of assets for which a nonrecurring fair value adjustment has been recognized	The following table presents the increase (decrease) in the fair value of certain assets held at the end of the respective reporting periods, for which a nonrecurring fair value adjustment was recognized for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Loans held-for-investment (1) : Commercial: C&I $ (9,580) $ (48,154) $ (35,365) CRE: CRE (10,231) (11,289) 9 Total commercial (19,811) (59,443) (35,356) Consumer: Residential mortgage: HELOCs (4) (175) (2) Other consumer — 2,491 — Total consumer $ (4) $ 2,316 $ (2) Total loans held-for-investment $ (19,815) $ (57,127) $ (35,358) Investments in tax credit and other investments, net $ 877 $ (3,868) $ (13,023) OREO $ — $ (3,680) $ (8) Other nonperforming assets $ (4,241) $ — $ (3,000) (1) Excludes loans fully charged off.

Assets Purchased under Resale_2

Assets Purchased under Resale Agreements and Sold under Repurchase Agreements (Tables)	12 Months Ended
	Dec. 31, 2021
RESALE AND REPURCHASE AGREEMENTS
Schedule of balance sheet offsetting for resale agreements and repurchase agreements	The following tables present the resale and repurchase agreements included on the Consolidated Balance Sheet as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Assets Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Received Resale agreements $ 2,353,503 $ — $ 2,353,503 $ (2,327,687) (1) $ 25,816 Liabilities Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Pledged Repurchase agreements $ 300,000 $ — $ 300,000 $ (300,000) (2) $ — ($ in thousands) December 31, 2020 Assets Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Received Resale agreements $ 1,460,000 $ — $ 1,460,000 $ (1,458,700) (1) $ 1,300 Liabilities Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset on the Net Collateral Pledged Repurchase agreements $ 300,000 $ — $ 300,000 $ (300,000) (2) $ — (1) Represents the fair value of assets the Company has received under resale agreements, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above. There was no netting of repurchase agreements against resale agreements for the year ended December 31, 2021. (2) Represents the fair value of assets the Company has pledged under repurchase agreements, limited for table presentation purposes to the amount of the recognized liability due to each counterparty. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above. There was no netting of repurchase agreements against resale agreements for the year ended December 31, 2021.

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost, gross unrealized gains, gross unrealized losses and fair value by major categories of AFS debt securities	The following tables present the amortized cost, gross unrealized gains and losses, and fair value by major categories of AFS debt securities as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Amortized Gross Gross Fair AFS debt securities: U.S. Treasury securities $ 1,049,238 $ 130 $ (16,687) $ 1,032,681 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,333,984 2,697 (34,710) 1,301,971 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 1,242,043 15,791 (28,854) 1,228,980 Residential mortgage-backed securities 2,968,789 8,629 (49,135) 2,928,283 Municipal securities 519,381 10,065 (6,288) 523,158 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 498,920 3,000 (5,477) 496,443 Residential mortgage-backed securities 889,937 971 (8,977) 881,931 Corporate debt securities 657,516 8,738 (16,589) 649,665 Foreign government bonds 260,447 767 (3,481) 257,733 Asset-backed securities 74,674 185 (301) 74,558 CLOs 592,250 52 (2,352) 589,950 Total AFS debt securities $ 10,087,179 $ 51,025 $ (172,851) $ 9,965,353 ($ in thousands) December 31, 2020 Amortized Gross Gross Fair AFS debt securities: U.S. Treasury securities $ 50,310 $ 451 $ — $ 50,761 U.S. government agency and U.S. government-sponsored enterprise debt securities 806,814 8,765 (1,260) 814,319 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 1,125,174 34,306 (5,710) 1,153,770 Residential mortgage-backed securities 1,634,553 27,952 (1,611) 1,660,894 Municipal securities 382,573 13,588 (88) 396,073 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 234,965 6,107 (1,230) 239,842 Residential mortgage-backed securities 288,520 1,761 (506) 289,775 Corporate debt securities 406,323 3,493 (3,848) 405,968 Foreign government bonds 183,828 163 (1,460) 182,531 Asset-backed securities 63,463 10 (242) 63,231 CLOs 294,000 — (6,506) 287,494 Total AFS debt securities $ 5,470,523 $ 96,596 $ (22,461) $ 5,544,658
Schedule of fair value and associated gross unrealized losses of AFS debt securities	The following tables present the fair value and the associated gross unrealized losses of the Company’s AFS debt securities, aggregated by investment category and the length of time that the securities have been in a continuous unrealized loss position, as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Less Than 12 Months 12 Months or More Total Fair Gross Fair Gross Fair Gross AFS debt securities: U.S. Treasury securities $ 935,776 $ (14,689) $ 47,881 $ (1,998) $ 983,657 $ (16,687) U.S. government agency and U.S. government-sponsored enterprise debt securities 773,647 (18,000) 402,907 (16,710) 1,176,554 (34,710) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 440,734 (13,589) 257,745 (15,265) 698,479 (28,854) Residential mortgage-backed securities 2,138,542 (37,691) 330,522 (11,444) 2,469,064 (49,135) Municipal securities 177,065 (5,682) 17,003 (606) 194,068 (6,288) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 301,925 (4,158) 40,013 (1,319) 341,938 (5,477) Residential mortgage-backed securities 707,792 (8,966) 6,431 (11) 714,223 (8,977) Corporate debt securities 183,916 (3,084) 251,494 (13,505) 435,410 (16,589) Foreign government bonds 27,097 (5) 133,279 (3,476) 160,376 (3,481) Asset-backed securities 24,885 (301) — — 24,885 (301) CLOs 221,586 (64) 291,712 (2,288) 513,298 (2,352) Total AFS debt securities $ 5,932,965 $ (106,229) $ 1,778,987 $ (66,622) $ 7,711,952 $ (172,851) ($ in thousands) December 31, 2020 Less Than 12 Months 12 Months or More Total Fair Gross Fair Gross Fair Gross AFS debt securities: U.S. Treasury securities $ 352,521 $ (1,260) $ — $ — $ 352,521 $ (1,260) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 292,596 (5,656) 3,543 (54) 296,139 (5,710) Residential mortgage-backed securities 342,561 (1,611) — — 342,561 (1,611) Municipal securities 24,529 (88) — — 24,529 (88) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 58,738 (1,230) 7,920 — 66,658 (1,230) Residential mortgage-backed securities 90,156 (506) — — 90,156 (506) Corporate debt securities 251,674 (3,645) 9,798 (203) 261,472 (3,848) Foreign government bonds 106,828 (1,460) — — 106,828 (1,460) Asset-backed securities — — 34,104 (242) 34,104 (242) CLOs — — 287,494 (6,506) 287,494 (6,506) Total AFS debt securities $ 1,519,603 $ (15,456) $ 342,859 $ (7,005) $ 1,862,462 $ (22,461)
Schedule of the gross realized gains and tax expense related to the sales of AFS debt securities	The following table presents gross realized gains and tax expense related to the sales of AFS debt securities for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Gross realized gains $ 1,568 $ 12,299 $ 3,930 Related tax expense $ 464 $ 3,636 $ 1,162
Schedule of contractual maturities of AFS debt securities	The following table presents the contractual maturities of AFS debt securities as of December 31, 2021. Expected maturities will differ from contractual maturities on certain securities as the issuers and borrowers of the underlying collateral may have the right to call or prepay obligations with or without prepayment penalties. ($ in thousands) Amortized Cost Fair Value Due within one year $ 1,482,716 $ 1,440,069 Due after one year through five years 1,191,837 1,189,880 Due after five years through ten years 1,413,217 1,408,494 Due after ten years 5,999,409 5,926,910 Total AFS debt securities $ 10,087,179 $ 9,965,353
Schedule of restricted equity securities	The following table presents the restricted equity securities on the Consolidated Balance Sheet as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 FRBSF stock $ 60,184 $ 59,249 FHLB stock 17,250 23,797 Total restricted equity securities $ 77,434 $ 83,046

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of notional and fair values of derivatives	The following table presents the notional amounts and gross fair values of the Company’s derivatives, as well as the balance sheet netting adjustments on an aggregate basis as of December 31, 2021 and 2020. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of December 31, 2021 and 2020. The resulting net derivative asset and liability fair values are included in Other assets and Accrued expenses and other liabilities , respectively, on the Consolidated Balance Sheet. ($ in thousands) December 31, 2021 December 31, 2020 Notional Fair Value Notional Fair Value Derivative Derivative Derivative Derivative Derivatives designated as hedging instruments: Cash flow hedges: Interest rate contracts $ 275,000 $ — $ 57 $ 275,000 $ — $ 1,864 Net investment hedges: Foreign exchange contracts 86,531 — 225 84,269 — 235 Total derivatives designated as hedging instruments $ 361,531 $ — $ 282 $ 359,269 $ — $ 2,099 Derivatives not designated as hedging instruments: Interest rate contracts $ 17,575,420 $ 240,222 $ 179,905 $ 18,155,678 $ 489,132 $ 315,834 Foreign exchange contracts 1,874,681 21,033 15,276 3,108,488 30,300 22,524 Credit contracts 72,560 — 141 76,992 13 206 Equity contracts — (1) 220 — — (1) 858 — Commodity contracts — (2) 222,709 194,567 — (2) 82,451 84,165 Total derivatives not designated as hedging instruments $ 19,522,661 $ 484,184 $ 389,889 $ 21,341,158 $ 602,754 $ 422,729 Gross derivative assets/liabilities $ 484,184 $ 390,171 $ 602,754 $ 424,828 Less: Master netting agreements (58,679) (58,679) (93,063) (93,063) Less: Cash collateral received/paid (42,274) (174,048) (8,449) (91,634) Net derivative assets/liabilities $ 383,231 $ 157,444 $ 501,242 $ 240,131 (1) The Company held equity contracts in one public company and 12 private companies as of December 31, 2021. In comparison, the Company held equity contracts in two public companies and 17 private companies as of December 31, 2020. (2) The notional amount of the Company’s commodity contracts entered with its customers totaled 7,519 thousand barrels of crude oil and 83,274 thousand units of natural gas, measured in million British thermal units (“MMBTUs”) as of December 31, 2021. In comparison, the notional amount of the Company’s commodity contracts entered with its customers totaled 6,321 thousand barrels of crude oil and 109,635 thousand MMBTUs of natural gas as of December 31, 2020. The Company simultaneously entered into the offsetting commodity contracts with mirrored terms with third-party financial institutions. The following tables present the notional amounts and the gross fair values of interest rate derivative contracts outstanding as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Written options $ 1,118,074 $ — $ 2,148 Purchased options $ 1,118,074 $ 2,159 $ — Sold collars and corridors 194,181 1,272 642 Collars and corridors 194,181 646 1,275 Swaps 7,460,836 211,727 39,650 Swaps 7,490,074 24,418 136,190 Total $ 8,773,091 $ 212,999 $ 42,440 Total $ 8,802,329 $ 27,223 $ 137,465 ($ in thousands) December 31, 2020 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Written options $ 957,393 $ — $ 115 Purchased options $ 957,393 $ 101 $ 15 Sold collars and corridors 518,477 7,673 — Collars and corridors 518,477 — 7,717 Swaps 7,586,414 479,634 1,364 Swaps 7,617,524 1,724 306,623 Total $ 9,062,284 $ 487,307 $ 1,479 Total $ 9,093,394 $ 1,825 $ 314,355 The following tables present the notional amounts and the gross fair values of foreign exchange derivative contracts outstanding as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Forwards and spot $ 900,290 $ 13,688 $ 9,446 Forwards and spot $ 267,689 $ 1,564 $ 2,695 Swaps 66,474 1,034 17 Swaps 599,654 4,745 3,116 Written options 20,287 1 — Purchased options 20,287 1 2 Total $ 987,051 $ 14,723 $ 9,463 Total $ 887,630 $ 6,310 $ 5,813 ($ in thousands) December 31, 2020 Customer Counterparty ($ in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Forwards and spot $ 1,522,888 $ 17,575 $ 17,928 Forwards and spot $ 145,197 $ 1,230 $ 273 Swaps 13,590 872 91 Swaps 1,191,355 10,049 3,658 Written options 117,729 — 574 Purchased options 117,729 574 — Total $ 1,654,207 $ 18,447 $ 18,593 Total $ 1,454,281 $ 11,853 $ 3,931 ($ in thousands) December 31, 2021 December 31, 2020 Notional Amount Fair Value Notional Amount Fair Value Assets Liabilities Assets Liabilities RPAs - protection sold $ 72,560 $ — $ 141 $ 66,278 $ — $ 206 RPAs - protection purchased — — — 10,714 13 — Total RPAs $ 72,560 $ — $ 141 $ 76,992 $ 13 $ 206 The following tables present the notional amounts and fair values of the commodity derivative positions outstanding as of December 31, 2021 and 2020. ($ and units in thousands) December 31, 2021 Customer Counterparty ($ and units in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Crude oil: Crude oil: Written options — Barrels $ 87 $ — Purchased options — Barrels $ — $ 81 Collars 2,837 Barrels 33,826 106 Collars 2,888 Barrels — 33,399 Swaps 4,682 Barrels 71,242 60 Swaps 7,517 Barrels 27,524 82,723 Total 7,519 $ 105,155 $ 166 Total 10,405 $ 27,524 $ 116,203 Natural gas: Natural gas: Collars 24,315 MMBTUs $ 10,903 $ 458 Collars 25,929 MMBTUs $ 1,136 $ 10,936 Swaps 58,959 MMBTUs 49,188 3,775 Swaps 109,567 MMBTUs 28,803 63,029 Total 83,274 $ 60,091 $ 4,233 Total 135,496 $ 29,939 $ 73,965 Total $ 165,246 $ 4,399 Total $ 57,463 $ 190,168 ($ and units in thousands) December 31, 2020 Customer Counterparty ($ and units in thousands) Financial Counterparty Notional Fair Value Notional Fair Value Assets Liabilities Assets Liabilities Crude oil: Crude oil: Collars 2,022 Barrels $ 2,344 $ 2,193 Collars 2,022 Barrels $ 2,217 $ 2,402 Swaps 4,299 Barrels 9,282 14,283 Swaps 4,299 Barrels 8,220 7,135 Total 6,321 $ 11,626 $ 16,476 Total 6,321 $ 10,437 $ 9,537 Natural gas: Natural gas: Written options 597 MMBTUs $ — $ 59 Purchased options 597 MMBTUs $ 59 $ — Collars 12,733 MMBTUs 1,063 205 Collars 16,293 MMBTUs 205 813 Swaps 96,305 MMBTUs 32,073 27,238 Swaps 103,973 MMBTUs 26,988 29,837 Total 109,635 $ 33,136 $ 27,502 Total 120,863 $ 27,252 $ 30,650 Total $ 44,762 $ 43,978 Total $ 37,689 $ 40,187
Schedule of net gains (losses) recognized on the Consolidated Statements of Income related to derivatives designated as fair value hedge	The following table presents the net gains (losses) recognized on the Consolidated Statement of Income related to the derivatives designated as fair value hedges for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Gains (losses) recorded in interest expense: Recognized on interest rate swaps $ — $ 3,146 $ 2,655 Recognized on certificates of deposit $ — $ (1,605) $ (2,536)
Schedule of pre-tax changes in AOCI from cash flows hedges	The following table presents the pre-tax changes in AOCI from cash flow hedges for the years ended December 31, 2021, 2020 and 2019. The after-tax impact of cash flow hedges on AOCI is shown in Note 15 — Accumulated Other Comprehensive Income (Loss) to the Consolidated Financial Statements in this Form-10-K. ($ in thousands) Year Ended December 31, 2021 2020 2019 Gains (losses) recognized in AOCI $ 1,210 $ (1,604) $ — (Losses) gains reclassified from AOCI to interest expense $ (868) $ 113 $ —
Schedule of net gains (losses) recognized on the Consolidated Statements of Income related to derivatives not designated as hedging instruments	The following table presents the net gains (losses) recognized on the Company’s Consolidated Statement of Income related to derivatives not designated as hedging instruments for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Classification on Year Ended December 31, 2021 2020 2019 Derivatives not designated as hedging instruments: Interest rate contracts Interest rate contracts and other derivative income $ 11,493 $ (8,637) $ (2,126) Foreign exchange contracts Foreign exchange income 45,921 23,215 22,264 Credit contracts Interest rate contracts and other derivative income 139 (5) 59 Equity contracts Lending fees 382 11,025 678 Commodity contracts Interest rate contracts and other derivative income (58) (35) (67) Net gains $ 57,877 $ 25,563 $ 20,808
Schedule of gross derivative fair values, the balance sheet netting adjustments and net fair values on the Consolidated Balance Sheets, as well as the cash and non-cash collateral	The following tables present the gross derivative fair values, the balance sheet netting adjustments and the resulting net fair values recorded on the consolidated balance sheet, as well as the cash and noncash collateral associated with master netting arrangements. The gross amounts of derivative assets and liabilities are presented after the application of variation margin payments as settlements with central counterparties, where applicable. The collateral amounts in the following tables are limited to the outstanding balances of the related asset or liability, after the application of netting; therefore instances of overcollateralization are not shown: ($ in thousands) As of December 31, 2021 Gross (1) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Received (3) Security Collateral Received (5) Derivative assets $ 484,184 $ (58,679) $ (42,274) $ 383,231 $ — $ 383,231 Gross (2) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Derivative liabilities $ 390,171 $ (58,679) $ (174,048) $ 157,444 $ (106,598) $ 50,846 ($ in thousands) As of December 31, 2020 Gross (1) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Received (3) Security Collateral (5) Derivative assets $ 602,754 $ (93,063) $ (8,449) $ 501,242 $ (35) $ 501,207 Gross (2) Gross Amounts Offset Net Amounts Gross Amounts Not Offset Net Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Derivative liabilities $ 424,828 $ (93,063) $ (91,634) $ 240,131 $ (221,150) $ 18,981 (1) Included $587 thousand and $1.1 million of gross fair value assets with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2021 and 2020, respectively. (2) Included $666 thousand and $220 thousand of gross fair value liabilities with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2021 and 2020, respectively. (3) Gross cash collateral received under master netting arrangements or similar agreements were $47.0 million and $15.8 million as of December 31, 2021 and 2020, respectively. Of the gross cash collateral received, $42.3 million and $8.4 million were used to offset against derivative assets as of December 31, 2021 and 2020, respectively. (4) Gross cash collateral pledged under master netting arrangements or similar agreements were $176.5 million and $91.6 million as of December 31, 2021 and 2020, respectively. Of the gross cash collateral pledged, $174.0 million and $91.6 million were used to offset against derivative liabilities as of December 31, 2021 and 2020, respectively. (5) Represents the fair value of security collateral received and pledged limited to derivative assets and liabilities that are subject to enforceable master netting arrangements or similar agreements. U.S. GAAP does not permit the netting of noncash collateral on the consolidated balance sheet but requires disclosure of such amounts.
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss)	The following table presents the after-tax losses recognized in AOCI on net investment hedges for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Losses recognized in AOCI $ (3,264) $ (4,801) $ (471)

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Abstract]
Schedule of the composition of loan held-for-investment	The following table presents the composition of the Company’s loans held-for-investment outstanding as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 December 31, 2020 Commercial: C&I (1) $ 14,150,608 $ 13,631,726 CRE: CRE 12,155,047 11,174,611 Multifamily residential 3,675,605 3,033,998 Construction and land 346,486 599,692 Total CRE 16,177,138 14,808,301 Total commercial 30,327,746 28,440,027 Consumer: Residential mortgage: Single-family residential 9,093,702 8,185,953 HELOCs 2,144,821 1,601,716 Total residential mortgage 11,238,523 9,787,669 Other consumer 127,512 163,259 Total consumer 11,366,035 9,950,928 Total loans held-for-investment (2) $ 41,693,781 $ 38,390,955 Allowance for loan losses (541,579) (619,983) Loans held-for-investment, net (2) $ 41,152,202 $ 37,770,972 (1) Includes PPP loans of $534.2 million and $1.57 billion as of December 31, 2021 and 2020, respectively. (2) Includes net deferred loan fees, unearned fees, unamortized premiums and unaccreted discounts of $(50.7) million and $(58.8) million as of December 31, 2021 and 2020, respectively. Net origination fees related to PPP loans were $(5.7) million and $(12.7) million as of December 31, 2021 and 2020, respectively.
Schedule of loans held-for-investment by loan portfolio segment, internal risk ratings and vintage year	The following tables summarize the Company’s loans held-for-investment by loan portfolio segments, internal risk ratings and vintage year as of December 31, 2021 and 2020. The vintage year is the year of origination, renewal or major modification. ($ in thousands) December 31, 2021 Term Loans Revolving Loans Revolving Loans Converted to Term Loans Amortized Cost Basis Total Amortized Cost Basis by Origination Year 2021 2020 2019 2018 2017 Prior Commercial: C&I: Pass $ 3,911,722 $ 1,133,085 $ 629,007 $ 187,195 $ 132,392 $ 225,326 $ 7,383,485 $ 28,842 $ 13,631,054 Criticized (accrual) 85,036 117,357 72,277 51,553 15,136 4,005 115,167 — 460,531 Criticized (nonaccrual) 29,456 2,792 513 517 9,301 16,444 — — 59,023 Total C&I 4,026,214 1,253,234 701,797 239,265 156,829 245,775 7,498,652 28,842 14,150,608 CRE: Pass 2,792,193 2,090,503 2,230,520 1,863,481 1,120,682 1,727,862 128,668 6,389 11,960,298 Criticized (accrual) 71,055 3,200 9,176 21,077 24,851 55,892 — — 185,251 Criticized (nonaccrual) 4,350 — — — 4,752 396 — — 9,498 Subtotal CRE 2,867,598 2,093,703 2,239,696 1,884,558 1,150,285 1,784,150 128,668 6,389 12,155,047 Multifamily residential: Pass 1,026,295 726,772 688,453 419,319 308,087 424,947 20,524 — 3,614,397 Criticized (accrual) — — 721 22,344 7,033 30,666 — — 60,764 Criticized (nonaccrual) — — — — — 444 — — 444 Subtotal multifamily residential 1,026,295 726,772 689,174 441,663 315,120 456,057 20,524 — 3,675,605 Construction and land: Pass 122,983 103,743 90,544 3,412 — 391 — — 321,073 Criticized (accrual) 3,355 — — 22,058 — — — — 25,413 Criticized (nonaccrual) — — — — — — — — — Subtotal construction and land 126,338 103,743 90,544 25,470 — 391 — — 346,486 Total CRE 4,020,231 2,924,218 3,019,414 2,351,691 1,465,405 2,240,598 149,192 6,389 16,177,138 Total commercial 8,046,445 4,177,452 3,721,211 2,590,956 1,622,234 2,486,373 7,647,844 35,231 30,327,746 Consumer: Single-family residential: Pass (1) 2,616,958 2,108,370 1,375,929 1,079,030 763,351 1,127,516 — — 9,071,154 Criticized (accrual) — — 458 2,813 1,899 3,212 — — 8,382 Criticized (Nonaccrual) (1) — — 1,751 3,889 4,295 4,231 — — 14,166 Subtotal single-family residential mortgage 2,616,958 2,108,370 1,378,138 1,085,732 769,545 1,134,959 — — 9,093,702 HELOCs: Pass 648 3,277 4,644 1,347 3,268 11,215 1,913,478 197,414 2,135,291 Criticized (accrual) — — — — — 371 7 708 1,086 Criticized (nonaccrual) — — 52 188 3,543 973 — 3,688 8,444 Subtotal HELOCs 648 3,277 4,696 1,535 6,811 12,559 1,913,485 201,810 2,144,821 Total residential mortgage 2,617,606 2,111,647 1,382,834 1,087,267 776,356 1,147,518 1,913,485 201,810 11,238,523 Other consumer: Pass 16,831 5,258 — — 1,741 52,147 51,481 — 127,458 Criticized (accrual) 2 — — — — — — — 2 Criticized (nonaccrual) — — — — — — 52 — 52 Subtotal other consumer 16,833 5,258 — — 1,741 52,147 51,533 — 127,512 Total consumer 2,634,439 2,116,905 1,382,834 1,087,267 778,097 1,199,665 1,965,018 201,810 11,366,035 Total $ 10,680,884 $ 6,294,357 $ 5,104,045 $ 3,678,223 $ 2,400,331 $ 3,686,038 $ 9,612,862 $ 237,041 $ 41,693,781 ($ in thousands) December 31, 2020 Term Loans Revolving Loans Revolving Loans Converted to Term Loans Amortized Cost Basis Total Amortized Cost Basis by Origination Year 2020 2019 2018 2017 2016 Prior Commercial: C&I: Pass $ 3,912,147 $ 1,477,740 $ 483,725 $ 245,594 $ 69,482 $ 245,615 $ 6,431,003 $ 29,487 $ 12,894,793 Criticized (accrual) 120,183 74,601 56,785 19,426 1,487 5,872 324,640 — 602,994 Criticized (nonaccrual) 2,125 25,267 22,240 18,787 4,964 1,592 58,964 — 133,939 Total C&I 4,034,455 1,577,608 562,750 283,807 75,933 253,079 6,814,607 29,487 13,631,726 CRE: Pass 2,296,649 2,402,136 2,310,748 1,328,251 732,694 1,529,681 173,267 19,064 10,792,490 Criticized (accrual) 47,459 63,654 43,447 98,259 2,094 80,662 — — 335,575 Criticized (nonaccrual) — — 42,067 1,115 — 3,364 — — 46,546 Subtotal CRE 2,344,108 2,465,790 2,396,262 1,427,625 734,788 1,613,707 173,267 19,064 11,174,611 Multifamily residential: Pass 783,671 783,589 479,959 411,945 181,213 348,751 5,895 — 2,995,023 Criticized (accrual) — 735 22,330 6,101 264 5,877 — — 35,307 Criticized (nonaccrual) — — 1,475 — — 2,193 — — 3,668 Subtotal multifamily residential 783,671 784,324 503,764 418,046 181,477 356,821 5,895 — 3,033,998 Construction and land: Pass 224,924 172,707 156,712 — 20,897 1,028 — — 576,268 Criticized (accrual) 3,524 — — — — 19,900 — — 23,424 Criticized (nonaccrual) — — — — — — — — — Subtotal construction and land 228,448 172,707 156,712 — 20,897 20,928 — — 599,692 Total CRE 3,356,227 3,422,821 3,056,738 1,845,671 937,162 1,991,456 179,162 19,064 14,808,301 Total commercial 7,390,682 5,000,429 3,619,488 2,129,478 1,013,095 2,244,535 6,993,769 48,551 28,440,027 Consumer: Single-family residential: Pass (1) 2,385,853 1,813,200 1,501,660 1,021,707 523,170 921,714 — — 8,167,304 Criticized (accrual) — 1,429 — — 119 1,034 — — 2,582 Criticized (nonaccrual) (1) — 226 812 1,789 1,994 11,246 — — 16,067 Subtotal single-family residential mortgage 2,385,853 1,814,855 1,502,472 1,023,496 525,283 933,994 — — 8,185,953 HELOCs: Pass 1,131 880 2,879 5,363 8,433 13,475 1,328,919 225,810 1,586,890 Criticized (accrual) — — 200 — 996 — 1,328 606 3,130 Criticized (nonaccrual) — 151 285 4,617 164 1,962 — 4,517 11,696 Subtotal HELOCs 1,131 1,031 3,364 9,980 9,593 15,437 1,330,247 230,933 1,601,716 Total residential mortgage 2,386,984 1,815,886 1,505,836 1,033,476 534,876 949,431 1,330,247 230,933 9,787,669 Other consumer: Pass 9,531 — — 1,830 — 83,255 66,136 — 160,752 Criticized (accrual) 16 — — — — — — — 16 Criticized (nonaccrual) — — — 2,491 — — — — 2,491 Subtotal other consumer 9,547 — — 4,321 — 83,255 66,136 — 163,259 Total consumer 2,396,531 1,815,886 1,505,836 1,037,797 534,876 1,032,686 1,396,383 230,933 9,950,928 Total $ 9,787,213 $ 6,816,315 $ 5,125,324 $ 3,167,275 $ 1,547,971 $ 3,277,221 $ 8,390,152 $ 279,484 $ 38,390,955 (1) As of December 31, 2021 and 2020, $1.6 million and $747 thousand, respectively, of nonaccrual loans whose payments are guaranteed by the Federal Housing Administration were classified with a “Pass” rating.
Schedule of aging analysis of loans	The following tables present the aging analysis of total loans held-for-investment as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 Current Accruing Accruing Total Total Total Commercial: C&I $ 14,080,516 $ 6,983 $ 4,086 $ 11,069 $ 59,023 $ 14,150,608 CRE: CRE 12,141,827 3,722 — 3,722 9,498 12,155,047 Multifamily residential 3,669,819 5,320 22 5,342 444 3,675,605 Construction and land 346,486 — — — — 346,486 Total CRE 16,158,132 9,042 22 9,064 9,942 16,177,138 Total commercial 30,238,648 16,025 4,108 20,133 68,965 30,327,746 Consumer: Residential mortgage: Single-family residential 9,059,222 10,191 8,569 18,760 15,720 9,093,702 HELOCs 2,130,523 4,776 1,078 5,854 8,444 2,144,821 Total residential mortgage 11,189,745 14,967 9,647 24,614 24,164 11,238,523 Other consumer 127,352 99 9 108 52 127,512 Total consumer 11,317,097 15,066 9,656 24,722 24,216 11,366,035 Total $ 41,555,745 $ 31,091 $ 13,764 $ 44,855 $ 93,181 $ 41,693,781 ($ in thousands) December 31, 2020 Current Accruing Loans (1) Accruing Accruing Total Total Total Commercial: C&I $ 13,488,070 $ 8,993 $ 724 $ 9,717 $ 133,939 $ 13,631,726 CRE: CRE 11,127,690 375 — 375 46,546 11,174,611 Multifamily residential 3,028,512 1,818 — 1,818 3,668 3,033,998 Construction and land 579,792 19,900 — 19,900 — 599,692 Total CRE 14,735,994 22,093 — 22,093 50,214 14,808,301 Total commercial 28,224,064 31,086 724 31,810 184,153 28,440,027 Consumer: Residential mortgage: Single-family residential 8,156,645 9,911 2,583 12,494 16,814 8,185,953 HELOCs 1,583,968 2,922 3,130 6,052 11,696 1,601,716 Total residential mortgage 9,740,613 12,833 5,713 18,546 28,510 9,787,669 Other consumer 160,534 217 17 234 2,491 163,259 Total consumer 9,901,147 13,050 5,730 18,780 31,001 9,950,928 Total $ 38,125,211 $ 44,136 $ 6,454 $ 50,590 $ 215,154 $ 38,390,955 (1) As of both December 31, 2021 and 2020, loans in payment deferral programs offered in response to the COVID-19 pandemic that are performing according to their modified terms are generally not considered delinquent, and are included in the “Current Accruing Loans” column.
Schedule of amortized cost of loans on nonaccrual status with no related allowance for loan losses	The following table presents amortized cost of loans on nonaccrual status for which there was no related allowance for loan losses as of both December 31, 2021 and 2020. Nonaccrual loans may not have an allowance for credit losses if there is no loss expectation since the loan balances are well secured by the collateral value. ($ in thousands) December 31, 2021 December 31, 2020 Commercial: C&I $ 22,967 $ 62,040 CRE: CRE 9,102 45,537 Multifamily residential — 2,519 Total CRE 9,102 48,056 Total commercial 32,069 110,096 Consumer: Residential mortgage: Single-family residential 5,785 6,013 HELOCs 5,033 8,076 Total residential mortgage 10,818 14,089 Other consumer — 2,491 Total consumer 10,818 16,580 Total nonaccrual loans with no related allowance for loan losses $ 42,887 $ 126,676
Summary of additions and post-modifications to troubled debt restructurings	The following tables present the additions to TDRs for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Loans Modified as TDRs During the Year Ended December 31, 2021 Number Pre-Modification Post-Modification (1) Financial (2) Commercial: C&I 5 $ 24,155 $ 20,263 $ 1,108 CRE: Multifamily residential 1 1,101 1,066 — Total CRE 1 1,101 1,066 — Total commercial 6 25,256 21,329 1,108 Total 6 $ 25,256 $ 21,329 $ 1,108 ($ in thousands) Loans Modified as TDRs During the Year Ended December 31, 2020 Number Pre-Modification Post-Modification (1) Financial (2) Commercial: C&I 14 $ 152,249 $ 134,467 $ 19,555 CRE: CRE 2 21,429 21,221 18 Multifamily residential 1 1,220 1,226 — Total CRE 3 22,649 22,447 18 Total commercial 17 174,898 156,914 19,573 Total 17 $ 174,898 $ 156,914 $ 19,573 ($ in thousands) Loans Modified as TDRs During the Year Ended December 31, 2019 Number Pre-Modification Post-Modification (1) Financial (2) Commercial: C&I 8 $ 95,742 $ 71,332 $ 8,004 CRE: Construction and land 1 19,696 19,691 — Total CRE 1 19,696 19,691 — Total commercial 9 115,438 91,023 8,004 Consumer: Residential mortgage: Single-family residential 2 1,123 1,098 2 HELOCs 2 539 528 — Total residential mortgage 4 1,662 1,626 2 Total consumer 4 1,662 1,626 2 Total 13 $ 117,100 $ 92,649 $ 8,006 (1) Includes subsequent payments after modification and reflects the balance as of December 31, 2021, 2020 and 2019. (2) Includes charge-offs and specific reserves recorded since the modification date. The following tables present the TDR post-modifications outstanding balances for the years ended December 31, 2021, 2020 and 2019 by modification type: ($ in thousands) Modification Type During the Year Ended December 31, 2021 Principal (1) Principal and Interest (2) Interest Interest Other (3) Total Commercial: C&I $ 4,679 $ — $ 15,584 $ — $ — $ 20,263 CRE: CRE — — — — — — Multifamily residential 1,066 — — — — 1,066 Total CRE 1,066 — — — — 1,066 Total commercial 5,745 — 15,584 — — 21,329 Total $ 5,745 $ — $ 15,584 $ — $ — $ 21,329 ($ in thousands) Modification Type During the Year Ended December 31, 2020 Principal (1) Principal and Interest (2) Interest Interest Other (3) Total Commercial: C&I $ 59,134 $ 10,863 $ 31,913 $ 32,557 $ — $ 134,467 CRE: CRE 21,221 — — — — 21,221 Multifamily residential 1,226 — — — — 1,226 Total CRE 22,447 — — — — 22,447 Total commercial 81,581 10,863 31,913 32,557 — 156,914 Total $ 81,581 $ 10,863 $ 31,913 $ 32,557 $ — $ 156,914 ($ in thousands) Modification Type During the Year Ended December 31, 2019 Principal (1) Principal (2) Interest Interest Other (3) Total Commercial: C&I $ 31,611 $ — $ — $ — $ 39,721 $ 71,332 CRE: Construction and land — — 19,691 — — 19,691 Total CRE — — 19,691 — — 19,691 Total commercial 31,611 — 19,691 — 39,721 91,023 Consumer: Residential mortgage: Single-family residential — 1,098 — — — 1,098 HELOCs — 397 — — 131 528 Total residential mortgage — 1,495 — — 131 1,626 Total consumer — 1,495 — — 131 1,626 Total $ 31,611 $ 1,495 $ 19,691 $ — $ 39,852 $ 92,649 (1) 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) Includes principal and interest deferments or reductions. (3) Includes primarily funding to secure additional collateral and provides liquidity to collateral-dependent C&I loans.
Summary of TDR loans subsequently defaulted	The following table presents the information on loans that entered into payment default during the years ended December 31, 2021, 2020 and 2019 that were modified as TDRs during the 12 months preceding payment default: ($ in thousands) Loans Modified as TDRs that Subsequently Defaulted 2021 2020 2019 Number of Recorded Number of Recorded Number of Recorded Commercial: C&I 1 $ 11,431 1 $ 15,852 3 $ 13,112 Total commercial 1 11,431 1 15,852 3 13,112 Total 1 $ 11,431 1 $ 15,852 3 $ 13,112
Key credit risk characteristics and macroeconomic variables	The following table provides key credit risk characteristics and macroeconomic variables that the Company uses to estimate the expected credit losses by portfolio segment: Portfolio Segment Risk Characteristics Macroeconomic Variables C&I Age (1) , size and spread at origination, and risk rating Volatility Index (“VIX”) and BBB yield to 10-year U.S. Treasury spread (“BBB Spread”) (1) CRE, Multifamily residential, and Construction and land Delinquency status, maturity date, collateral value, property type, and geographic location Unemployment rate, Gross Domestic Product (“GDP”), and U.S. Treasury rates Single-family residential and HELOCs FICO score, delinquency status, maturity date, collateral value, and geographic location Unemployment rate, GDP, and home price index Other consumer Historical loss experience Immaterial (2) (1) Due to model enhancements, the risk characteristic related to “time-to-maturity” was changed to “age”; while macroeconomic variables related to “unemployment rate and two- and ten-year U.S. Treasury spread” were changed to “VIX and BBB Spread” during the year ended December 31, 2021. (2) Macroeconomic variables are included in the qualitative estimate.
Summary of the activity in the allowance for credit losses	The following tables summarize the activity in the allowance for loan losses by portfolio segments for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 Commercial Consumer Total C&I CRE Residential Mortgage Other CRE Multifamily Construction Single- HELOCs Allowance for loan losses, beginning of period $ 398,040 $ 163,791 $ 27,573 $ 10,239 $ 15,520 $ 2,690 $ 2,130 $ 619,983 (Reversal of ) provision for credit losses on loans (a) (39,715) 14,282 (15,076) 7,576 1,965 745 1,286 (28,937) Gross charge-offs (32,490) (28,430) (130) (2,954) (1,046) (45) (1,497) (66,592) Gross recoveries 11,906 1,297 2,033 607 721 45 5 16,614 Total net (charge-offs) recoveries (20,584) (27,133) 1,903 (2,347) (325) — (1,492) (49,978) Foreign currency translation adjustment 511 — — — — — — 511 Allowance for loan losses, end of period $ 338,252 $ 150,940 $ 14,400 $ 15,468 $ 17,160 $ 3,435 $ 1,924 $ 541,579 ($ in thousands) Year Ended December 31, 2020 Commercial Consumer Total C&I CRE Residential Mortgage Other CRE Multifamily Construction Single- HELOCs Allowance for loan losses, beginning of period $ 238,376 $ 40,509 $ 22,826 $ 19,404 $ 28,527 $ 5,265 $ 3,380 $ 358,287 Impact of ASU 2016-13 adoption 74,237 72,169 (8,112) (9,889) (3,670) (1,798) 2,221 125,158 Provision for (reversal of) credit losses on loans (a) 145,212 55,864 10,879 644 (9,922) (605) (3,381) 198,691 Gross charge-offs (66,225) (15,206) — — — (221) (185) (81,837) Gross recoveries 5,428 10,455 1,980 80 585 49 95 18,672 Total net (charge-offs) recoveries (60,797) (4,751) 1,980 80 585 (172) (90) (63,165) Foreign currency translation adjustment 1,012 — — — — — — 1,012 Allowance for loan losses, end of period $ 398,040 $ 163,791 $ 27,573 $ 10,239 $ 15,520 $ 2,690 $ 2,130 $ 619,983 ($ in thousands) Year Ended December 31, 2019 Commercial Consumer Total C&I CRE Residential Mortgage Other CRE Multifamily Construction Single- HELOCs Allowance for loan losses, beginning of period $ 189,117 $ 40,666 $ 19,885 $ 20,290 $ 31,340 $ 5,774 $ 4,250 $ 311,322 Provision for (reversal of) credit losses on loans (a) 109,068 (4,345) 1,085 (1,422) (2,938) (516) (839) 100,093 Gross charge-offs (73,985) (1021) — — (11) — (50) (75,067) Gross recoveries 14,501 5,209 1,856 536 136 7 19 22,264 Total net (charge-offs) recoveries (59,484) 4,188 1,856 536 125 7 (31) (52,803) Foreign currency translation adjustment (325) — — — — — — (325) Allowance for loan losses, end of period $ 238,376 $ 40,509 $ 22,826 $ 19,404 $ 28,527 $ 5,265 $ 3,380 $ 358,287 The following table summarizes the activities in the allowance for unfunded credit commitments for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Unfunded credit facilities Allowance for unfunded credit commitments, beginning of period $ 33,577 $ 11,158 $ 12,566 Impact of ASU 2016-13 adoption — 10,457 — (Reversal of) provision for credit losses on unfunded credit commitments (b) (6,063) 11,962 (1,408) Allowance for unfunded credit commitments, end of period 27,514 33,577 11,158 (Reversal of) provision for credit losses (a) + (b) $ (35,000) $ 210,653 $ 98,685
Schedule of carrying value of loans transferred, loans sold and purchased for the held-for-investment portfolio	The following tables provide information on the carrying value of loans transferred, loans sold and purchased for the held-for-investment portfolio, during the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 Commercial Consumer Total CRE Residential Mortgage C&I CRE Multifamily Construction Single-Family Loans transferred from held-for-investment to held-for-sale (1) $ 496,655 $ 78,834 $ — $ 18,883 $ 5,238 $ 599,610 Sales (2)(3)(4) $ 502,694 $ 78,834 $ — $ 21,557 $ 18,458 $ 621,543 Purchases (5) $ 479,690 $ — $ 370 $ — $ 564,651 $ 1,044,711 ($ in thousands) Year Ended December 31, 2020 Commercial Consumer Total CRE Residential Mortgage C&I CRE Multifamily Construction Single-Family Loans transferred from held-for-investment to held-for-sale (1) $ 300,677 $ 26,994 $ 1,398 $ — $ — $ 329,069 Sales (2)(3)(4) $ 303,520 $ 26,994 $ 1,398 $ — $ 80,309 $ 412,221 Purchases (5) $ 154,154 $ — $ 2,358 $ — $ 233,068 $ 389,580 ($ in thousands) Year Ended December 31, 2019 Commercial Consumer Total CRE Residential Mortgage C&I CRE Multifamily Construction Single-Family Loans transferred from held-for-investment to held-for-sale (1) $ 245,002 $ 39,062 $ — $ 1,573 $ — $ 285,637 Sales (2)(3)(4) $ 245,791 $ 39,062 $ — $ 1,573 $ 10,410 $ 296,836 Purchases (5) $ 397,615 $ — $ 8,988 $ — $ 117,227 $ 523,830 (1) Includes write-downs of $12.2 million, $2.8 million and $789 thousand to the allowance for loan losses related to loans transferred from held-for-investment to held-for-sale for the years ended December 31, 2021, 2020 and 2019, respectively. (2) Includes originated loans sold of $413.1 million, $400.4 million and $230.3 million for the years ended December 31, 2021, 2020 and 2019, respectively. Originated loans sold consist primarily of C&I for all periods. (3) Includes $208.4 million, $11.8 million and $66.5 million of purchased loans sold in the secondary market for the years ended December 31, 2021, 2020 and 2019, respectively. (4) Net gains on sales of loans were $8.9 million, $4.5 million and $4.0 million for the years ended December 31, 2021, 2020 and 2019, respectively. (5) C&I loan purchases consisted primarily of syndicated C&I term loans.

Investments in Qualified Affo_2

Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2021
Investments in Qualified Affordable Housing Partnerships, Net [Abstract]
Schedule of investments in qualified affordable housing partnerships, net, and related unfunded commitments	The following table presents the Company’s investments in qualified affordable housing partnerships, net, and related unfunded commitments as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Investments in qualified affordable housing partnerships, net $ 289,741 $ 213,555 Accrued expenses and other liabilities — Unfunded commitments $ 146,152 $ 77,444
Schedule of additional information related to investments in qualified affordable housing partnership, net	The following table presents additional information related to the Company’s investments in qualified affordable housing partnerships, net, for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Tax credits and other tax benefits recognized $ 50,591 $ 45,971 $ 46,034 Amortization expense included in income tax expense $ 33,248 $ 37,132 $ 36,561
Schedule of tax credit and other investment, net, and related unfunded commitments	The following table presents the Company’s investments in tax credit and other investments, net, and related unfunded commitments as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Investments in tax credit and other investments, net $ 338,522 $ 266,525 Accrued expenses and other liabilities — Unfunded commitments $ 163,464 $ 105,282
Schedule of Amortization of Tax Credit and Other Investments	The following table presents additional information related to the Company’s investments in tax credit and other investments, net, for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Amortization of tax credit and other investments $ 122,457 $ 70,082 $ 98,383
Schedule of unfunded commitments related to investments in qualified affordable housing partnerships, tax credit and other investments, estimated to be funded	As of December 31, 2021, the Company’s unfunded commitments related to investments in qualified affordable housing partnerships, tax credit and other investments are estimated to be funded as follows: ($ in thousands) Amount 2022 $ 174,475 2023 109,622 2024 5,751 2025 14,847 2026 978 Thereafter 3,943 Total $ 309,616

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of gross carrying amount of core deposit intangible assets and accumulated amortization	The following table presents the gross carrying amount and accumulated amortization of core deposits intangible assets as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Gross balance (1) $ 86,099 $ 86,099 Accumulated amortization (1) (82,471) (79,722) Net carrying balance (1) $ 3,628 $ 6,377 (1) Excludes fully amortized core deposit intangible assets.
Schedule of estimated future amortization expense of the core deposit intangibles	The following table presents the estimated future amortization expense of core deposit intangibles as of December 31, 2021: ($ in thousands) Amount 2022 $ 1,865 2023 1,199 2024 553 2025 11 Total $ 3,628

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
DEPOSIT ACCOUNTS
Deposit Liabilities, Type	The following table presents the composition of the Company’s deposits as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Deposits: Noninterest-bearing demand $ 22,845,464 $ 16,298,301 Interest-bearing checking 6,524,721 6,142,193 Money market 13,130,300 10,740,667 Savings 2,888,065 2,681,242 Time deposits (1) : Domestic office 6,940,013 8,159,641 Foreign office 1,021,969 840,708 Total deposits $ 53,350,532 $ 44,862,752 (1) The aggregate amount of time deposits that met or exceeded the deposit insurance limit was $5.95 billion and $6.62 billion as of December 31, 2021 and 2020, respectively.
Time Deposit Maturities	The following table presents the scheduled maturities of time deposits for the five years succeeding December 31, 2021 and thereafter: ($ in thousands) Amount 2022 $ 7,605,509 2023 285,518 2024 57,727 2025 6,545 2026 6,668 Thereafter 15 Total $ 7,961,982

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances and Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2021
FEDERAL HOME LOAN BANK ADVANCES AND LONG-TERM DEBT
Schedule Of FHLB and Long-Term Debt	The following table presents the balance of the Company’s junior subordinated debt and FHLB advances as of December 31, 2021 and 2020, and the related contractual rates and maturity dates as of December 31, 2021: ($ in thousands) Interest Rate Maturity Dates December 31, 2021 2020 Amount Amount Parent Company Junior subordinated debt (1 ) — floating (2) 1.55% — 2.10% 2034 — 2037 $ 147,658 $ 147,376 Bank FHLB advances (3) : Fixed 0.00% — 2.34% 2021 — 405,000 Floating (2) 0.53% — 0.59% 2022 249,331 247,612 Total FHLB advances $ 249,331 $ 652,612 (1) The weighted-average contractual interest rates for junior subordinated debt were 1.74% and 2.26% as of December 31, 2021 and 2020, respectively. (2) Floating interest rates reset monthly or quarterly based on LIBOR.
Schedule of the components of long-term debt	The following table presents the outstanding junior subordinated debt issued by each trust as of December 31, 2021, and 2020: Issuer Stated (1) Stated Current Rate December 31, 2021 December 31, 2020 Aggregate Aggregate Aggregate Aggregate ($ in thousands) East West Capital Trust V November 2034 3-month LIBOR + 1.80% 1.96% $ 464 $ 15,000 $ 464 $ 15,000 East West Capital Trust VI September 2035 3-month LIBOR + 1.50% 1.70% 619 20,000 619 20,000 East West Capital Trust VII June 2036 3-month LIBOR + 1.35% 1.55% 928 30,000 928 30,000 East West Capital Trust VIII June 2037 3-month LIBOR + 1.40% 1.58% 619 18,000 619 18,000 East West Capital Trust IX September 2037 3-month LIBOR + 1.90% 2.10% 928 30,000 928 30,000 MCBI Statutory Trust I December 2035 3-month LIBOR + 1.55% 1.75% 1,083 35,000 1,083 35,000 Total $ 4,641 $ 148,000 $ 4,641 $ 148,000 (1) All the above debt instruments mature in more than five years after December 31, 2021 and are subject to call options where early redemption requires appropriate notice.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of components of income tax expense/benefit	The following table presents the components of income tax expense (benefit) for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Current income tax expense (benefit): Federal $ 84,249 $ 84,560 $ 107,393 State 95,939 74,252 86,578 Foreign (1,554) 671 (2,485) Total current income tax expense 178,634 159,483 191,486 Deferred income tax expense (benefit): Federal 1,528 (28,093) (8,801) State 3,259 (11,671) (16,390) Foreign (25) (1,751) 3,587 Total deferred income tax expense (benefit) 4,762 (41,515) (21,604) Income tax expense $ 183,396 $ 117,968 $ 169,882
Schedule of reconciliation of the federal statutory rate to the effective tax rate	The following table presents the reconciliation of the federal statutory rate to the Company’s effective tax rate for the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 Statutory U.S. federal tax rate 21.0 % 21.0 % 21.0 % U.S. state income taxes, net of U.S. federal income tax effect 7.4 7.2 7.1 Tax credits and benefits, net of related expenses (11.3) (12.4) (6.8) Other, net 0.3 1.4 (1.2) Effective tax rate 17.4 % 17.2 % 20.1 %
Schedule of temporary differences that give rise to a significant portion of deferred tax assets and liabilities	The following table summarizes the tax effects of temporary differences that give rise to a significant portion of deferred tax assets and liabilities as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Deferred tax assets: Allowance for loan losses $ 166,398 $ 192,534 Investments in qualified affordable housing partnerships, tax credit and other investments, net 14,977 11,174 Deferred compensation 23,954 23,604 Interest income on nonaccrual loans 4,192 5,909 State taxes 5,237 273 Unrealized losses on securities 37,423 — Tax credit carryforwards 8,692 — Premises and equipment 1,434 2,096 Lease liabilities 31,324 30,554 Other 1,018 1,441 Total deferred tax assets $ 294,649 $ 267,585 Deferred tax liabilities: Equipment lease financing $ 26,607 $ 29,990 Investments in qualified affordable housing partnerships, tax credit and other investments, net 12,187 14,912 Core deposit intangibles 1,119 1,934 FHLB stock dividends 1,886 1,855 Mortgage servicing assets 1,759 1,675 Acquired debts 1,536 1,597 Prepaid expenses 1,525 1,194 Premises and equipment — 99 Unrealized gains on securities — 21,593 Operating lease right-of-use assets 29,472 28,468 Other 428 453 Total deferred tax liabilities $ 76,519 $ 103,770 Net deferred tax assets $ 218,130 $ 163,815
Schedule of reconciliation of the beginning and ending amounts of unrecognized tax benefits	The following table presents a reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Beginning balance $ 5,045 $ — $ 4,378 Additions for tax positions related to prior years — 5,045 30,103 Deductions for tax positions related to prior years — — (34,481) Ending balance $ 5,045 $ 5,045 $ —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of credit-related commitments	The following table presents the Company’s credit-related commitments as of December 31, 2021 and 2020: ($ in thousands) December 31, 2021 2020 Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Expire After Five Years Total Total Loan commitments $ 3,282,433 $ 123,780 $ 2,740,508 $ 764,677 $ 6,911,398 $ 5,690,917 Commercial letters of credit and SBLCs 1,116,404 346,303 119,356 639,636 2,221,699 2,240,813 Total $ 4,398,837 $ 470,083 $ 2,859,864 $ 1,404,313 $ 9,133,097 $ 7,931,730
Schedule of guarantees outstanding	The following table presents the carrying amounts of loans sold or securitized with recourse and the maximum potential future payments as of December 31, 2021 and 2020: ($ in thousands) Maximum Potential Future Payments Carrying Value December 31, December 31, 2021 2020 2021 2020 Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Expire After Five Years Total Total Total Total Single-family residential loans sold or securitized with recourse $ 33 $ 329 $ 37 $ 7,527 $ 7,926 $ 10,526 $ 7,926 $ 10,526 Multifamily residential loans sold or securitized with recourse — — — 14,996 14,996 15,672 23,169 26,619 Total $ 33 $ 329 $ 37 $ 22,523 $ 22,922 $ 26,198 $ 31,095 $ 37,145

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of stock compensation expense and related net tax benefits	The following table presents a summary of the total share-based compensation expense and the related net tax benefits (deficiencies) associated with the Company’s various employee share-based compensation plans for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Stock compensation costs $ 32,567 $ 29,237 $ 30,761 Related net tax benefits (deficiencies) for stock compensation plans $ 1,760 $ (1,839) $ 4,792
Summary of activities for time-based and performance-based restricted stock units	The following table presents a summary of the activities for the Company’s time- and performance-based RSUs that will be settled in shares for the year ended December 31, 2021. The number of outstanding performance-based RSUs provided below assumes that performance will be met at the 100% target level. Time-Based RSUs Performance-Based RSUs Shares Weighted- Shares Weighted- Outstanding, January 1, 2021 1,345,635 $ 50.22 398,057 $ 53.66 Granted 417,900 71.88 91,960 77.67 Vested (301,800) 66.85 (120,286) 70.13 Forfeited (131,789) 56.26 — — Outstanding, December 31, 2021 1,329,946 $ 52.65 369,731 $ 54.28
Summary of time-based RSU's that will be settled in cash	The following table presents a summary of the activities for the Company’s time-based RSUs that will be settled in cash for the year ended December 31, 2021: Shares Outstanding, January 1, 2021 21,802 Granted 24,073 Vested — Forfeited (13,228) Outstanding, December 31, 2021 32,647

Stockholders_ Equity and Earn_2

Stockholders’ Equity and Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of earnings per share calculations	The following table presents the basic and diluted EPS calculations for the years ended December 31, 2021, 2020 and 2019. For more information on the calculation of EPS, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Earnings Per Share to the Consolidated Financial Statements in this Form 10-K. ($ and shares in thousands, except per share data) Year Ended December 31, 2021 2020 2019 Basic: Net income available to common stockholders $ 872,981 $ 567,797 $ 674,035 Basic weighted-average number of shares outstanding 141,826 142,336 145,497 Basic EPS $ 6.16 $ 3.99 $ 4.63 Diluted: Net income available to common stockholders $ 872,981 $ 567,797 $ 674,035 Basic weighted-average number of shares outstanding 141,826 142,336 145,497 Diluted potential common shares (1) 1,314 655 682 Diluted weighted-average number of shares outstanding (1) 143,140 142,991 146,179 Diluted EPS $ 6.10 $ 3.97 $ 4.61 (1) Includes dilutive shares from RSUs for the years ended December 31, 2021, 2020 and 2019.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of the changes in the components of accumulated other comprehensive income (loss) balances	The following table presents the changes in the components of AOCI balances for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) AFS Cash Foreign (1) Total Balance, December 31, 2018 $ (45,821) $ — $ (12,353) $ (58,174) Net unrealized gains (losses) arising during the period 46,170 — (3,636) 42,534 Amounts reclassified from AOCI (2,768) — — (2,768) Changes, net of tax 43,402 — (3,636) 39,766 Balance, December 31, 2019 $ (2,419) $ — $ (15,989) $ (18,408) Net unrealized gains (losses) arising during the period 63,329 (1,149) 9,297 71,477 Amounts reclassified from AOCI (8,663) (81) — (8,744) Changes, net of tax 54,666 (1,230) 9,297 62,733 Balance, December 31, 2020 $ 52,247 $ (1,230) $ (6,692) $ 44,325 Net unrealized (losses) gains arising during the period (136,846) 866 1,757 (134,223) Amounts reclassified from AOCI (1,104) 621 — (483) Changes, net of tax (137,950) 1,487 1,757 (134,706) Balance, December 31, 2021 $ (85,703) $ 257 $ (4,935) $ (90,381) (1) Represents foreign currency translation adjustments related to the Company’s net investment in non-U.S. operations, including related hedges. The functional currency and reporting currency of the Company’s foreign subsidiary was RMB and USD, respectively.
Schedule of components of other comprehensive income (loss), reclassifications to net income and the related tax effects	The following table presents the components of other comprehensive income (loss), reclassifications to net income and the related tax effects for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Year Ended December 31, 2021 2020 2019 Before - Tax Net-of- Before - Tax Net-of- Before - Tax Net-of- AFS debt securities: Net unrealized (losses) gains arising during the period $ (194,393) $ 57,547 $ (136,846) $ 89,868 $ (26,539) $ 63,329 $ 65,549 $ (19,379) $ 46,170 Net realized (gains) reclassified into net income (1) (1,568) 464 (1,104) (12,299) 3,636 (8,663) (3,930) 1,162 (2,768) Net change (195,961) 58,011 (137,950) 77,569 (22,903) 54,666 61,619 (18,217) 43,402 Cash flow hedges Net unrealized gains (losses) arising during the period 1,210 (344) 866 (1,604) 455 (1,149) — — — Net realized losses (gains) reclassified into net income (2) 868 (247) 621 (113) 32 (81) — — — Net change 2,078 (591) 1,487 (1,717) 487 (1,230) — — — Foreign currency translation adjustments, net of hedges: Net unrealized gains (losses) arising during the period (3) 463 1,294 1,757 7,398 1,899 9,297 290 (3,926) (3,636) Net change 463 1,294 1,757 7,398 1,899 9,297 290 (3,926) (3,636) Other comprehensive (loss) income $ (193,420) $ 58,714 $ (134,706) $ 83,250 $ (20,517) $ 62,733 $ 61,909 $ (22,143) $ 39,766 (1) Pre-tax amounts were reported in Net g ains on sales of AFS debt securities on the Consolidated Statement of Income for the years ended December 31, 2021, 2020 and 2019. (2) Pre-tax amounts were reported in Interest expense on the Consolidated Statement of Income for the years ended December 31, 2021 and 2020. (3) The tax effects on foreign currency translation adjustments, net of hedges represent the cumulative net deferred tax liabilities on net investment hedges since its inception.

Regulatory Requirements and M_2

Regulatory Requirements and Matters (Tables)	12 Months Ended
	Dec. 31, 2021
Banking and Thrift, Interest [Abstract]
Schedule of regulatory capital information	The following table presents the regulatory capital information of the Company and the Bank as of December 31, 2021 and 2020: ($ in thousands) Basel III December 31, 2021 December 31, 2020 Minimum Fully Phased-in Minimum Capital Ratios (3) Well- Actual Actual Amount Ratio Amount Ratio Ratio Ratio Ratio Total capital (to risk-weighted assets) Company $ 6,124,827 14.1 % $ 5,510,640 14.3 % 8.0 % 10.5 % 10.0 % East West Bank $ 5,766,734 13.2 % $ 5,143,246 13.4 % 8.0 % 10.5 % 10.0 % Tier 1 capital (to risk-weighted assets) Company $ 5,559,357 12.8 % $ 4,882,555 12.7 % 6.0 % 8.5 % 6.0 % East West Bank $ 5,349,264 12.3 % $ 4,662,426 12.1 % 6.0 % 8.5 % 8.0 % CET1 capital (to risk-weighted assets) Company $ 5,559,357 12.8 % $ 4,882,555 12.7 % 4.5 % 7.0 % 6.5 % East West Bank $ 5,349,264 12.3 % $ 4,662,426 12.1 % 4.5 % 7.0 % 6.5 % Tier 1 leverage capital (to adjusted average assets) Company (1) $ 5,559,357 9.0 % $ 4,882,555 9.4 % 4.0 % 4.0 % N/A East West Bank $ 5,349,264 8.6 % $ 4,662,426 9.0 % 4.0 % 4.0 % 5.0 % Risk-weighted assets Company $ 43,585,105 N/A $ 38,406,071 N/A N/A N/A N/A East West Bank $ 43,572,086 N/A $ 38,481,275 N/A N/A N/A N/A Adjusted quarterly average total assets (2) Company $ 62,387,003 N/A $ 52,540,964 N/A N/A N/A N/A East West Bank $ 62,366,514 N/A $ 52,594,313 N/A N/A N/A N/A (1) The Tier 1 leverage capital well-capitalized requirement applies only to the Bank since there is no Tier 1 leverage ratio component in the definition of a well-capitalized bank holding company. (2) Reflects adjusted quarterly average total assets for the years ended December 31, 2021 and 2020. (3) Includes a 2.5% capital conservation buffer requirement above the minimum risk-based capital ratios. N/A — Not applicable.

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Schedule of operating results and key financial measures by operating segments	The following tables present the results of operations and other key financial measures for the individual operating segments as of and for the years ended December 31, 2021, 2020 and 2019: ($ in thousands) Consumer and Commercial Other Total Year Ended December 31, 2021 Net interest income before reversal of provision for credit losses $ 697,101 $ 766,202 $ 68,268 $ 1,531,571 Reversal of provision for credit losses (4,998) (30,002) — (35,000) Noninterest income (1) 94,125 163,768 28,002 285,895 Noninterest expense 364,635 271,408 160,046 796,089 Segment income (loss) before income taxes (1) 431,589 688,564 (63,776) 1,056,377 Segment net income (1) $ 308,630 $ 492,271 $ 72,080 $ 872,981 As of December 31, 2021 Segment assets $ 14,961,809 $ 28,556,706 $ 17,352,186 $ 60,870,701 ($ in thousands) Consumer and Commercial Other Total Year Ended December 31, 2020 Net interest income before provision for credit losses $ 530,829 $ 706,286 $ 140,078 $ 1,377,193 Provision for credit losses 3,885 206,768 — 210,653 Noninterest income (1) 64,115 142,337 29,095 235,547 Noninterest expense 331,750 266,923 117,649 716,322 Segment income before income taxes (1) 259,309 374,932 51,524 685,765 Segment net income (1) $ 185,782 $ 268,476 $ 113,539 $ 567,797 As of December 31, 2020 Segment assets $ 13,351,060 $ 26,958,766 $ 11,847,087 $ 52,156,913 ($ in thousands) Consumer and Commercial Other Total Year Ended December 31, 2019 Net interest income before provision for credit losses $ 696,551 $ 651,413 $ 119,849 $ 1,467,813 Provision for credit losses 14,178 84,507 — 98,685 Noninterest income (1) 57,238 135,305 29,702 222,245 Noninterest expense 343,001 263,064 141,391 747,456 Segment income before income taxes (1) 396,610 439,147 8,160 843,917 Segment net income (1) $ 283,674 $ 314,321 $ 76,040 $ 674,035 As of December 31, 2019 Segment assets $ 11,520,586 $ 25,501,534 $ 7,173,976 $ 44,196,096 (1) During the fourth quarter of 2021, the Company enhanced its segment allocation methodology related to the fair values of interest rate and commodity derivative contracts, which are included in noninterest income. These fair values that were previously allocated to the “Commercial Banking” segment, have been reclassified between “Consumer and Business Banking” and “Commercial Banking.” Prior years’ balances have been reclassified to conform to the 2021 presentation.

Parent Company Condensed Fina_2

Parent Company Condensed Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheet	The following tables present the Parent Company-only condensed financial statements: CONDENSED BALANCE SHEET ($ in thousands, except shares) December 31, 2021 2020 ASSETS Cash and cash equivalents due from subsidiary bank $ 345,018 $ 439,065 Investments in subsidiaries: Bank 5,626,975 5,048,896 Nonbank 9,136 6,738 Investments in tax credit investments, net 4,082 6,586 Other assets 9,407 3,072 TOTAL $ 5,994,618 $ 5,504,357 LIABILITIES Long-term debt $ 147,658 $ 147,376 Accrued income tax payable — 81,741 Other liabilities 9,742 6,065 Total liabilities 157,400 235,182 STOCKHOLDERS’ EQUITY Common stock, $0.001 par value, 200,000,000 shares authorized; 167,790,645 and 167,240,600 shares issued in 2021 and 2020, respectively 168 167 Additional paid-in capital 1,893,557 1,858,352 Retained earnings 4,683,659 4,000,414 Treasury stock, at cost 25,882,691 shares in 2021 and 25,675,371 shares in 2020 (649,785) (634,083) AOCI, net of tax (90,381) 44,325 Total stockholders’ equity 5,837,218 5,269,175 TOTAL $ 5,994,618 $ 5,504,357
Condensed Statement of Income	CONDENSED STATEMENT OF INCOME ($ in thousands) Year Ended December 31, 2021 2020 2019 Dividends from subsidiaries: Bank $ 200,000 $ 511,000 $ 190,000 Nonbank 82 109 189 Other income 11 3 425 Total income 200,093 511,112 190,614 Interest expense on long-term debt 2,974 3,877 6,482 Compensation and employee benefits 6,370 6,210 5,479 Amortization of tax credit and other investments 425 1,248 8,437 Other expense 1,306 1,184 1,487 Total expense 11,075 12,519 21,885 Income before income tax benefit and equity in undistributed income of subsidiaries 189,018 498,593 168,729 Income tax benefit 3,005 4,158 6,737 Undistributed earnings of subsidiaries, primarily bank 680,958 65,046 498,569 Net income $ 872,981 $ 567,797 $ 674,035
Condensed Statement of Cash Flows	CONDENSED STATEMENT OF CASH FLOWS ($ in thousands) Year Ended December 31, 2021 2020 2019 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 872,981 $ 567,797 $ 674,035 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed earnings of subsidiaries, principally bank (680,958) (65,046) (498,569) Amortization expense 1,877 1,523 8,703 Deferred income tax expense (benefit) 2,721 491 (10,132) Net change in other assets (5,685) 40 10,246 Net change in other liabilities (81,706) 77,052 (18) Net cash provided by operating activities 109,230 581,857 184,265 CASH FLOWS FROM INVESTING ACTIVITIES Net increase in investments in tax credit investments (346) (172) (292) Distributions received from equity method investees 436 4,096 2,577 Net increase in investments in and advances to nonbank subsidiaries (1,476) (2,732) (3,314) Other investing activities — — (157) Net cash (used in) provided by investing activities (1,386) 1,192 (1,186) CASH FLOWS FROM FINANCING ACTIVITIES Common stock: Proceeds from issuance pursuant to various stock compensation plans and agreements 2,573 2,326 3,383 Stock tendered for payment of withholding taxes (15,702) (8,253) (14,635) Repurchased of common stock pursuant to the Stock Repurchase Program — (145,966) — Cash dividends paid (188,762) (158,222) (155,107) Net cash used in financing activities (201,891) (310,115) (166,359) Net (decrease) increase in cash and cash equivalents (94,047) 272,934 16,720 Cash and cash equivalents, beginning of year 439,065 166,131 149,411 Cash and cash equivalents, end of year $ 345,018 $ 439,065 $ 166,131

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Nature of Operations and Principles of Consolidation) (Details)	12 Months Ended
	Dec. 31, 2021locationtrust	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of banking locations (more than) | location	120
Principles of Consolidation
Number of wholly owned subsidiaries that are statutory business trusts | trust	6
Deposit service charges and related fee income | Revenue Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Abstract]
Revenue streams, Percent of total non-interest income	35.00%
Card income | Revenue Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Abstract]
Revenue streams, Percent of total non-interest income		29.00%
Wealth management fees | Revenue Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Abstract]
Revenue streams, Percent of total non-interest income			26.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Paycheck Protection Program) (Details) - C&I - CARES Act, Paycheck Protection Program Liquidity Facility $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)loan
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest rate	1.00%
Number of PPP loans authorized | loan	1,800
Amount of PPP loans authorized, outstanding balance | $	$ 534.2
Financing receivable, term (in years)	5 years

Summary of Significant Accoun_6

Summary of Significant Accounting Policies (Premises and Equipment, net) (Details)	12 Months Ended
	Dec. 31, 2021
Buildings
Premises and equipment
Estimated useful life	25 years
Furniture, fixtures and equipment, and building improvements | Minimum
Premises and equipment
Estimated useful life	3 years
Furniture, fixtures and equipment, and building improvements | Maximum
Premises and equipment
Estimated useful life	7 years

Summary of Significant Accoun_7

Summary of Significant Accounting Policies (Goodwill and Other Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2021segment
Goodwill and other intangible assets
Number of reportable segments	3
Customer Relationships | Minimum
Goodwill and other intangible assets
Projected useful life	8 years
Customer Relationships | Maximum
Goodwill and other intangible assets
Projected useful life	15 years

Summary of Significant Accoun_8

Summary of Significant Accounting Policies (Stock-Based Compensation) (Details) - RSUs	12 Months Ended
	Dec. 31, 2021
Ratably
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Cliff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years

Summary of Significant Accoun_9

Summary of Significant Accounting Policies (New Accounting Pronouncements Adopted) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements Adopted and Recent Accounting Pronouncements [Line Items]
Allowance for loan losses	$ 541,579	$ 619,983
Retained earnings	$ 4,683,659	$ 4,000,414

Fair Value Measurement and Fa_3

Fair Value Measurement and Fair Value of Financial Instruments (Financial Assets and Liabilities Measurement on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt securities available-for-sale
Fair Value	$ 9,965,353	$ 5,544,658
Investments in tax credit and other investments, net	338,522	266,525
Derivative
Derivative assets - Fair value	484,184	602,754
Derivative asset, after netting	383,231	501,242
Derivative liabilities - Fair Value	390,171	424,828
Derivative liability, after netting	157,444	240,131
U.S. Treasury securities
Debt securities available-for-sale
Fair Value	1,032,681	50,761
U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	1,301,971	814,319
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	1,228,980	1,153,770
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	2,928,283	1,660,894
Municipal securities
Debt securities available-for-sale
Fair Value	523,158	396,073
Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	496,443	239,842
Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	881,931	289,775
Corporate debt securities
Debt securities available-for-sale
Fair Value	649,665	405,968
Asset-backed securities
Debt securities available-for-sale
Fair Value	74,558	63,231
Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	589,950	287,494
Fair Value, Measurements, Recurring
Debt securities available-for-sale
Fair Value	9,965,353	5,544,658
Equity Securities with readily determinable fair value	26,604	31,272
Investments in tax credit and other investments, net	26,604	31,272
Derivative
Derivative assets - Fair value	484,184	602,754
Netting adjustments	(100,953)	(101,512)
Derivative asset, after netting	383,231	501,242
Derivative liabilities - Fair Value	390,171	424,828
Netting adjustments	(232,727)	(184,697)
Derivative liability, after netting	157,444	240,131
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative
Derivative assets - Fair value	240,222	489,132
Derivative liabilities - Fair Value	179,962	317,698
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative
Derivative assets - Fair value	21,033	30,300
Derivative liabilities - Fair Value	15,501	22,759
Fair Value, Measurements, Recurring | Credit contracts
Derivative
Derivative assets - Fair value	0	13
Derivative liabilities - Fair Value	141	206
Fair Value, Measurements, Recurring | Equity contracts
Derivative
Derivative assets - Fair value	220	858
Fair Value, Measurements, Recurring | Commodity contracts
Derivative
Derivative assets - Fair value	222,709	82,451
Derivative liabilities - Fair Value	194,567	84,165
Fair Value, Measurements, Recurring | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	1,032,681	50,761
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	1,301,971	814,319
Fair Value, Measurements, Recurring | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	1,228,980	1,153,770
Fair Value, Measurements, Recurring | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	2,928,283	1,660,894
Fair Value, Measurements, Recurring | Municipal securities
Debt securities available-for-sale
Fair Value	523,158	396,073
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	496,443	239,842
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	881,931	289,775
Fair Value, Measurements, Recurring | Corporate debt securities
Debt securities available-for-sale
Fair Value	649,665	405,968
Fair Value, Measurements, Recurring | Asset-backed securities
Debt securities available-for-sale
Fair Value	74,558	63,231
Fair Value, Measurements, Recurring | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	589,950	287,494
Fair Value, Measurements, Recurring | Foreign government bonds
Debt securities available-for-sale
Fair Value	257,733	182,531
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Debt securities available-for-sale
Fair Value	1,032,681	50,761
Equity Securities with readily determinable fair value	22,130	22,548
Investments in tax credit and other investments, net	22,130	22,548
Derivative
Derivative assets - Fair value	0	0
Netting adjustments	0	0
Derivative asset, after netting	0	0
Derivative liabilities - Fair Value	0	0
Netting adjustments	0	0
Derivative liability, after netting	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Credit contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity contracts
Derivative
Derivative assets - Fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	1,032,681	50,761
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government bonds
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Debt securities available-for-sale
Fair Value	8,932,672	5,493,897
Equity Securities with readily determinable fair value	4,474	8,724
Investments in tax credit and other investments, net	4,474	8,724
Derivative
Derivative assets - Fair value	483,969	602,481
Netting adjustments	(100,953)	(101,512)
Derivative asset, after netting	383,016	500,969
Derivative liabilities - Fair Value	390,171	424,828
Netting adjustments	(232,727)	(184,697)
Derivative liability, after netting	157,444	240,131
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate contracts
Derivative
Derivative assets - Fair value	240,222	489,132
Derivative liabilities - Fair Value	179,962	317,698
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign exchange contracts
Derivative
Derivative assets - Fair value	21,033	30,300
Derivative liabilities - Fair Value	15,501	22,759
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Credit contracts
Derivative
Derivative assets - Fair value	0	13
Derivative liabilities - Fair Value	141	206
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Equity contracts
Derivative
Derivative assets - Fair value	5	585
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commodity contracts
Derivative
Derivative assets - Fair value	222,709	82,451
Derivative liabilities - Fair Value	194,567	84,165
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	1,301,971	814,319
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	1,228,980	1,153,770
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	2,928,283	1,660,894
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal securities
Debt securities available-for-sale
Fair Value	523,158	396,073
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	496,443	239,842
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	881,931	289,775
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Debt securities available-for-sale
Fair Value	649,665	405,968
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Debt securities available-for-sale
Fair Value	74,558	63,231
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	589,950	287,494
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign government bonds
Debt securities available-for-sale
Fair Value	257,733	182,531
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Debt securities available-for-sale
Fair Value	0	0
Equity Securities with readily determinable fair value	0	0
Investments in tax credit and other investments, net	0	0
Derivative
Derivative assets - Fair value	215	273
Netting adjustments	0	0
Derivative asset, after netting	215	273
Derivative liabilities - Fair Value	0	0
Netting adjustments	0	0
Derivative liability, after netting	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Interest rate contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Foreign exchange contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Credit contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts
Derivative
Derivative assets - Fair value	215	273
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Commodity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Municipal securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Asset-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Foreign government bonds
Debt securities available-for-sale
Fair Value	$ 0	$ 0

Fair Value Measurement and Fa_4

Fair Value Measurement and Fair Value of Financial Instruments (Reconciliation of Assets and Liabilities Measured on Recurring Basis) (Details) - Equity contracts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lending fees
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)
Total unrealized (losses) gains for the period included in earnings	$ (44)	$ 8,200	$ (292)
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
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	273	421	673
Total gains included in earnings	32	8,225	563
Issuances	12	0	114
Settlements	(96)	0	(929)
Transfers out of Level 3	6	8,373	0
Ending balance	$ 215	$ 273	$ 421

Fair Value Measurement and Fa_5

Fair Value Measurement and Fair Value of Financial Instruments (Quantitative Information for Significant Unobservable Inputs) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Quantitative information
Derivative assets - Fair value	$ 484,184	$ 602,754
Other nonperforming assets
Quantitative information
Assets, fair value disclosure
Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	484,184	602,754
Fair Value, Measurements, Recurring | Equity contracts
Quantitative information
Derivative assets - Fair value	220	858
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Quantitative information
Derivative assets - Fair value	215	273
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts
Quantitative information
Derivative assets - Fair value	215	273
Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, Fair value	126,984	189,862
Fair Value, Measurements, Nonrecurring | OREO
Quantitative information
Assets, fair value disclosure		15,824
Fair Value, Measurements, Nonrecurring | Investments in tax credit and other investments, net
Quantitative information
Assets, fair value disclosure		3,140
Fair Value, Measurements, Nonrecurring | Other nonperforming assets
Quantitative information
Assets, fair value disclosure	391
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Quantitative information
Loans held-for-investment, Fair value	126,984	189,862
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows
Quantitative information
Loans held-for-investment, Fair value	64,919	104,783
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount
Quantitative information
Loans held-for-investment, Fair value	38,537	22,207
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Contract Value
Quantitative information
Loans held-for-investment, Fair value		15,879
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Loans held-for-investment, Fair value	23,528	46,993
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO
Quantitative information
Assets, fair value disclosure		15,824
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Assets, fair value disclosure		15,824
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Investments in tax credit and other investments, net
Quantitative information
Assets, fair value disclosure		3,140
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Investments in tax credit and other investments, net | Valuation Technique, Individual Analysis
Quantitative information
Assets, fair value disclosure		$ 3,140
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Other nonperforming assets
Quantitative information
Assets, fair value disclosure	$ 0
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Black-Scholes option pricing model | Minimum
Quantitative information
Equity contracts, measurement input	44.00%	46.00%
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Black-Scholes option pricing model | Maximum
Quantitative information
Equity contracts, measurement input	54.00%	61.00%
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Black-Scholes option pricing model | Weighted Average
Quantitative information
Equity contracts, measurement input	49.00%	53.00%
Liquidity discount | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts
Quantitative information
Equity contracts, measurement input	47.00%	47.00%
Liquidity discount | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Weighted Average
Quantitative information
Equity contracts, measurement input	47.00%	47.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Minimum
Quantitative information
Loans held-for-investment, measurement input	4.00%	3.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Maximum
Quantitative information
Loans held-for-investment, measurement input	15.00%	15.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	7.00%	11.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount | Minimum
Quantitative information
Loans held-for-investment, measurement input	15.00%	10.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount | Maximum
Quantitative information
Loans held-for-investment, measurement input	75.00%	26.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	41.00%	15.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Loans held-for-investment, measurement input	8.00%
OREO, measurement input		0.08
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Minimum
Quantitative information
Loans held-for-investment, measurement input		7.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Maximum
Quantitative information
Loans held-for-investment, measurement input		26.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	8.00%	10.00%
OREO, measurement input		0.08

Fair Value Measurement and Fa_6

Fair Value Measurement and Fair Value of Financial Instruments (Carrying Amounts of Assets That Were Still Held and Had Fair Value Changes Measured on a Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other nonperforming assets
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure
Fair Value, Measurements, Nonrecurring
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	126,984	$ 189,862
Fair Value, Measurements, Nonrecurring | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	124,240	186,225
Fair Value, Measurements, Nonrecurring | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	102,349	143,331
Fair Value, Measurements, Nonrecurring | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	21,891	42,894
Fair Value, Measurements, Nonrecurring | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	2,744	3,637
Fair Value, Measurements, Nonrecurring | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	2,744	1,146
Fair Value, Measurements, Nonrecurring | Consumer Lending | Other consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment		2,491
Fair Value, Measurements, Nonrecurring | Other nonperforming assets
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	391
Fair Value, Measurements, Nonrecurring | Investments in tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		3,140
Fair Value, Measurements, Nonrecurring | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		15,824
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer Lending | Other consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment		0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other nonperforming assets
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	391
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Investments in tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Consumer Lending | Other consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment		0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Other nonperforming assets
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Investments in tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	126,984	189,862
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	124,240	186,225
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	102,349	143,331
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	21,891	42,894
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	2,744	3,637
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	2,744	1,146
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Consumer Lending | Other consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment		2,491
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Other nonperforming assets
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	$ 0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Investments in tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		3,140
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure		$ 15,824

Fair Value Measurement and Fa_7

Fair Value Measurement and Fair Value of Financial Instruments (Increase (Decrease) in Value of Assets Measured on a Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loans held-for-investment
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	$ (19,815)	$ (57,127)	$ (35,358)
Loans held-for-investment | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	(19,811)	(59,443)	(35,356)
Loans held-for-investment | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	(9,580)	(48,154)	(35,365)
Loans held-for-investment | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	(10,231)	(11,289)	9
Loans held-for-investment | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	(4)	2,316	(2)
Loans held-for-investment | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	(4)	(175)	(2)
Loans held-for-investment | Consumer Lending | Other consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	0	2,491	0
Investments in tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	877	(3,868)	(13,023)
OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	0	(3,680)	(8)
Other nonperforming assets
Fair Value, Assets Measured on a Nonrecurring Basis
Increase (decrease) in fair value of assets	$ (4,241)	$ 0	$ (3,000)

Fair Value Measurement and Fa_8

Fair Value Measurement and Fair Value of Financial Instruments (Carrying and Fair Values Estimates per the Fair Value Hierarchy of Financial Instruments on a nonrecurring basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial assets:
Cash and cash equivalents	$ 3,912,935	$ 4,017,971
Interest-bearing deposits with banks	736,492	809,728
Resale agreements	2,353,503	1,460,000
Restricted equity securities, at cost	77,434	83,046
Loans held-for-investment, net	41,152,202	37,770,972
Financial liabilities:
Time deposits	7,961,982
FHLB advances	249,331	652,612
Repurchase agreements	300,000	300,000
Carrying Amount
Financial assets:
Cash and cash equivalents	3,912,935	4,017,971
Interest-bearing deposits with banks	736,492	809,728
Resale agreements	2,353,503	1,460,000
Restricted equity securities, at cost	77,434	83,046
Loans held-for-sale	635	1,788
Loans held-for-investment, net	41,152,202	37,770,972
Mortgage servicing rights	5,706	5,522
Accrued interest receivable	159,833	150,140
Financial liabilities:
Demand, checking, savings and money market deposits	45,388,550	35,862,403
Time deposits	7,961,982	9,000,349
Short-term borrowings		21,009
FHLB advances	249,331	652,612
Repurchase agreements	300,000	300,000
Long-term debt	147,658	147,376
Accrued interest payable	11,435	11,956
Estimated Fair Value
Financial assets:
Cash and cash equivalents	3,912,935	4,017,971
Interest-bearing deposits with banks	736,492	809,728
Resale agreements	2,335,901	1,464,635
Restricted equity securities, at cost	77,434	83,046
Loans held-for-sale	635	1,788
Loans held-for-investment, net	41,199,599	37,803,940
Mortgage servicing rights	9,104	8,435
Accrued interest receivable	159,833	150,140
Financial liabilities:
Demand, checking, savings and money market deposits	45,388,550	35,862,403
Time deposits	7,966,116	9,016,884
Short-term borrowings		21,009
FHLB advances	250,372	659,631
Repurchase agreements	310,525	317,850
Long-term debt	151,020	150,131
Accrued interest payable	11,435	11,956
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	3,912,935	4,017,971
Interest-bearing deposits with banks	0	0
Resale agreements	0	0
Restricted equity securities, at cost	0	0
Loans held-for-sale	0	0
Loans held-for-investment, net	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	0	0
Financial liabilities:
Demand, checking, savings and money market deposits	0	0
Time deposits	0	0
Short-term borrowings		0
FHLB advances	0	0
Repurchase agreements	0	0
Long-term debt	0	0
Accrued interest payable	0	0
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Interest-bearing deposits with banks	736,492	809,728
Resale agreements	2,335,901	1,464,635
Restricted equity securities, at cost	77,434	83,046
Loans held-for-sale	635	1,788
Loans held-for-investment, net	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	159,833	150,140
Financial liabilities:
Demand, checking, savings and money market deposits	45,388,550	35,862,403
Time deposits	7,966,116	9,016,884
Short-term borrowings		21,009
FHLB advances	250,372	659,631
Repurchase agreements	310,525	317,850
Long-term debt	151,020	150,131
Accrued interest payable	11,435	11,956
Estimated Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Interest-bearing deposits with banks	0	0
Resale agreements	0	0
Restricted equity securities, at cost	0	0
Loans held-for-sale	0	0
Loans held-for-investment, net	41,199,599	37,803,940
Mortgage servicing rights	9,104	8,435
Accrued interest receivable	0	0
Financial liabilities:
Demand, checking, savings and money market deposits	0	0
Time deposits	0	0
Short-term borrowings		0
FHLB advances	0	0
Repurchase agreements	0	0
Long-term debt	0	0
Accrued interest payable	$ 0	$ 0

Assets Purchased under Resale_3

Assets Purchased under Resale Agreements and Sold under Repurchase Agreements (Resale Agreements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Offsetting Assets [Line Items]
Gross resale agreements	$ 1,330	$ 1,160
Loans purchased under agreements to resell	$ 1,020	$ 300
Loans Purchased Under Resale Agreements
Offsetting Assets [Line Items]
Weighted average yield (as a percent)	1.53%	2.27%
Securities Purchased Under Resale Agreements
Offsetting Assets [Line Items]
Weighted average yield (as a percent)	1.53%	1.94%	2.66%

Assets Purchased under Resale_4

Assets Purchased under Resale Agreements and Sold under Repurchase Agreements (Repurchase Agreements) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amount of securities sold under repurchase agreements
Gross repurchase agreements	$ 300,000,000	$ 300,000,000
Weighted average interest rates	2.61%	3.25%	4.74%
Repurchase agreements’ extinguishment cost	$ 0	$ 8,740,000	$ 0
Extinguishment of repurchase agreements		$ 150,000,000

Assets Purchased under Resale_5

Assets Purchased under Resale Agreements and Sold under Repurchase Agreements (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets, Resale Agreements
Gross Amounts of Recognized Assets	$ 2,353,503	$ 1,460,000
Gross Amounts Offset on the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented on the Consolidated Balance Sheet	2,353,503	1,460,000
Gross Amounts Not Offset on the Consolidated Balance Sheet
Collateral Received	(2,327,687)	(1,458,700)
Net Amount	25,816	1,300
Liabilities, Repurchase Agreements
Gross Amounts of Recognized Liabilities	300,000	300,000
Gross Amounts Offset on the Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented on the Consolidated Balance Sheet	300,000	300,000
Gross Amounts Not Offset on the Consolidated Balance Sheet
Collateral Pledged	(300,000)	(300,000)
Net Amount	$ 0	$ 0

Securities (Schedule of Availab

Securities (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 10,087,179	$ 5,470,523
Gross Unrealized Gains	51,025	96,596
Gross Unrealized Losses	(172,851)	(22,461)
Fair Value	9,965,353	5,544,658
Debt securities available for sale
Debt Securities, Available-for-sale [Line Items]
Accrued interest receivables	33,100	22,300
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,049,238	50,310
Gross Unrealized Gains	130	451
Gross Unrealized Losses	(16,687)	0
Fair Value	1,032,681	50,761
U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,333,984	806,814
Gross Unrealized Gains	2,697	8,765
Gross Unrealized Losses	(34,710)	(1,260)
Fair Value	1,301,971	814,319
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,242,043	1,125,174
Gross Unrealized Gains	15,791	34,306
Gross Unrealized Losses	(28,854)	(5,710)
Fair Value	1,228,980	1,153,770
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,968,789	1,634,553
Gross Unrealized Gains	8,629	27,952
Gross Unrealized Losses	(49,135)	(1,611)
Fair Value	2,928,283	1,660,894
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	519,381	382,573
Gross Unrealized Gains	10,065	13,588
Gross Unrealized Losses	(6,288)	(88)
Fair Value	523,158	396,073
Non-agency commercial mortgage-backed Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	498,920	234,965
Gross Unrealized Gains	3,000	6,107
Gross Unrealized Losses	(5,477)	(1,230)
Fair Value	496,443	239,842
Non-agency residential mortgage-backed Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	889,937	288,520
Gross Unrealized Gains	971	1,761
Gross Unrealized Losses	(8,977)	(506)
Fair Value	881,931	289,775
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	657,516	406,323
Gross Unrealized Gains	8,738	3,493
Gross Unrealized Losses	(16,589)	(3,848)
Fair Value	649,665	405,968
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	260,447	183,828
Gross Unrealized Gains	767	163
Gross Unrealized Losses	(3,481)	(1,460)
Fair Value	257,733	182,531
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	74,674	63,463
Gross Unrealized Gains	185	10
Gross Unrealized Losses	(301)	(242)
Fair Value	74,558	63,231
CLOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	592,250	294,000
Gross Unrealized Gains	52	0
Gross Unrealized Losses	(2,352)	(6,506)
Fair Value	$ 589,950	$ 287,494

Securities (Continuous Unrealiz

Securities (Continuous Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	$ 5,932,965	$ 1,519,603
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(106,229)	(15,456)
Available-for-sale debt securities, More than 12 Months, Fair Value	1,778,987	342,859
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(66,622)	(7,005)
Available-for-sale debt securities, Fair Value, Total	7,711,952	1,862,462
Available-for-sale debt securities, Gross Unrealized Loss, Total	(172,851)	(22,461)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	935,776	352,521
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(14,689)	(1,260)
Available-for-sale debt securities, More than 12 Months, Fair Value	47,881	0
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(1,998)	0
Available-for-sale debt securities, Fair Value, Total	983,657	352,521
Available-for-sale debt securities, Gross Unrealized Loss, Total	(16,687)	(1,260)
U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	773,647
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(18,000)
Available-for-sale debt securities, More than 12 Months, Fair Value	402,907
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(16,710)
Available-for-sale debt securities, Fair Value, Total	1,176,554
Available-for-sale debt securities, Gross Unrealized Loss, Total	(34,710)
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	440,734	292,596
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(13,589)	(5,656)
Available-for-sale debt securities, More than 12 Months, Fair Value	257,745	3,543
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(15,265)	(54)
Available-for-sale debt securities, Fair Value, Total	698,479	296,139
Available-for-sale debt securities, Gross Unrealized Loss, Total	(28,854)	(5,710)
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	2,138,542	342,561
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(37,691)	(1,611)
Available-for-sale debt securities, More than 12 Months, Fair Value	330,522	0
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(11,444)	0
Available-for-sale debt securities, Fair Value, Total	2,469,064	342,561
Available-for-sale debt securities, Gross Unrealized Loss, Total	(49,135)	(1,611)
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	177,065	24,529
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(5,682)	(88)
Available-for-sale debt securities, More than 12 Months, Fair Value	17,003	0
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(606)	0
Available-for-sale debt securities, Fair Value, Total	194,068	24,529
Available-for-sale debt securities, Gross Unrealized Loss, Total	(6,288)	(88)
Non-agency commercial mortgage-backed Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	301,925	58,738
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(4,158)	(1,230)
Available-for-sale debt securities, More than 12 Months, Fair Value	40,013	7,920
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(1,319)	0
Available-for-sale debt securities, Fair Value, Total	341,938	66,658
Available-for-sale debt securities, Gross Unrealized Loss, Total	(5,477)	(1,230)
Non-agency residential mortgage-backed Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	707,792	90,156
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(8,966)	(506)
Available-for-sale debt securities, More than 12 Months, Fair Value	6,431	0
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(11)	0
Available-for-sale debt securities, Fair Value, Total	714,223	90,156
Available-for-sale debt securities, Gross Unrealized Loss, Total	(8,977)	(506)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	183,916	251,674
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(3,084)	(3,645)
Available-for-sale debt securities, More than 12 Months, Fair Value	251,494	9,798
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(13,505)	(203)
Available-for-sale debt securities, Fair Value, Total	435,410	261,472
Available-for-sale debt securities, Gross Unrealized Loss, Total	(16,589)	(3,848)
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	27,097	106,828
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(5)	(1,460)
Available-for-sale debt securities, More than 12 Months, Fair Value	133,279	0
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(3,476)	0
Available-for-sale debt securities, Fair Value, Total	160,376	106,828
Available-for-sale debt securities, Gross Unrealized Loss, Total	(3,481)	(1,460)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	24,885	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(301)	0
Available-for-sale debt securities, More than 12 Months, Fair Value	0	34,104
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	0	(242)
Available-for-sale debt securities, Fair Value, Total	24,885	34,104
Available-for-sale debt securities, Gross Unrealized Loss, Total	(301)	(242)
Collateralized loan obligations (“CLOs”)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, Less than 12 Months, Fair Value	221,586	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(64)	0
Available-for-sale debt securities, More than 12 Months, Fair Value	291,712	287,494
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(2,288)	(6,506)
Available-for-sale debt securities, Fair Value, Total	513,298	287,494
Available-for-sale debt securities, Gross Unrealized Loss, Total	$ (2,352)	$ (6,506)

Securities (Narrative) (Details

Securities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security	Dec. 31, 2019USD ($)
Unrealized loss
Number of available-for-sale debt securities in an unrealized loss position	431	104
OTTI credit loss recognized | $			$ 0
Provision for credit losses recognized | $	$ 0	$ 0
Collateralized loan obligations (“CLOs”)
Unrealized loss
Number of available-for-sale debt securities in an unrealized loss position		3
Mortgage backed securities issued by us government agencies and government sponsored enterprise
Unrealized loss
Number of available-for-sale debt securities in an unrealized loss position	180	46
U.S. government agency and U.S. government-sponsored enterprise debt securities
Unrealized loss
Number of available-for-sale debt securities in an unrealized loss position	50
U.S. Treasury securities
Unrealized loss
Number of available-for-sale debt securities in an unrealized loss position	21
Corporate debt securities
Unrealized loss
Number of available-for-sale debt securities in an unrealized loss position	30	17

Securities (Allowance for Credi

Securities (Allowance for Credit Losses) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrealized loss
Allowance for credit losses	$ 0	$ 0
Provision for credit losses recognized	$ 0	$ 0
OTTI credit loss recognized			$ 0

Securities (Realized Gains and

Securities (Realized Gains and Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 1,568	$ 12,299	$ 3,930
Related tax expense	$ 464	$ 3,636	$ 1,162

Securities (Scheduled Contractu

Securities (Scheduled Contractual Maturities of AFS Debt Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Amortized Cost
Due within one year	$ 1,482,716
Due after one year through five years	1,191,837
Due after five years through ten years	1,413,217
Due after ten years	5,999,409
Amortized Cost	10,087,179	$ 5,470,523
Fair Value
Due within one year	1,440,069
Due after one year through five years	1,189,880
Due after five years through ten years	1,408,494
Due after ten years	5,926,910
Total available-for-sale Debt securities	9,965,353	5,544,658
Available-for-sale debt securities pledged as collateral at fair value	$ 803,896	$ 588,484

Securities (Restricted Equity S

Securities (Restricted Equity Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
FRBSF stock	$ 60,184	$ 59,249
FHLB stock	17,250	23,797
Total restricted equity securities	$ 77,434	$ 83,046

Derivatives (Notional and Fair

Derivatives (Notional and Fair Values) (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)MMBTUBoecompany	Dec. 31, 2020USD ($)BoeMMBTUcompany
Derivative Asset [Abstract]
Derivative assets - Fair value	$ 484,184	$ 602,754
Less: Master Netting Arrangements	(58,679)	(93,063)
Less: Cash collateral received or paid	(42,274)	(8,449)
Derivative asset, after netting	383,231	501,242
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	390,171	424,828
Less: Master Netting Arrangements	(58,679)	(93,063)
Less: Cash collateral received/paid	(174,048)	(91,634)
Derivative liability, after netting	$ 157,444	$ 240,131
Customer Counterparty | Crude Oil
Derivative Liability [Abstract]
Derivative, nonmonetary notional amount, energy measure | Boe	7,519	6,321
Customer Counterparty | Natural Gas
Derivative Liability [Abstract]
Derivative, nonmonetary notional amount, energy measure | MMBTU	83,274	109,635
Derivative instruments designated as hedging instruments
Derivative Instruments
Notional Amount	$ 361,531	$ 359,269
Derivative Asset [Abstract]
Derivative assets - Fair value	0	0
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	282	2,099
Derivative instruments designated as hedging instruments | Interest rate contracts | Cash Flow Hedging
Derivative Instruments
Notional Amount	275,000	275,000
Derivative Asset [Abstract]
Derivative assets - Fair value	0	0
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	57	1,864
Derivative instruments designated as hedging instruments | Foreign exchange contracts | Net investment hedges
Derivative Instruments
Notional Amount	86,531	84,269
Derivative Asset [Abstract]
Derivative assets - Fair value	0	0
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	225	235
Derivative instruments not designated as hedging instruments
Derivative Instruments
Notional Amount	19,522,661	21,341,158
Derivative Asset [Abstract]
Derivative assets - Fair value	484,184	602,754
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	389,889	422,729
Derivative instruments not designated as hedging instruments | Interest rate contracts
Derivative Instruments
Notional Amount	17,575,420	18,155,678
Derivative Asset [Abstract]
Derivative assets - Fair value	240,222	489,132
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	179,905	315,834
Derivative instruments not designated as hedging instruments | Foreign exchange contracts
Derivative Instruments
Notional Amount	1,874,681	3,108,488
Derivative Asset [Abstract]
Derivative assets - Fair value	21,033	30,300
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	15,276	22,524
Derivative instruments not designated as hedging instruments | Credit contracts
Derivative Instruments
Notional Amount	72,560	76,992
Derivative Asset [Abstract]
Derivative assets - Fair value	0	13
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	141	206
Derivative instruments not designated as hedging instruments | Equity contracts
Derivative Instruments
Notional Amount	0	0
Derivative Asset [Abstract]
Derivative assets - Fair value	220	858
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	0	0
Derivative instruments not designated as hedging instruments | Commodity contracts
Derivative Instruments
Notional Amount	0	0
Derivative Asset [Abstract]
Derivative assets - Fair value	222,709	82,451
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	$ 194,567	$ 84,165
Derivative instruments not designated as hedging instruments | Equity, Public Companies
Derivative Liability [Abstract]
Number of companies that Issued the equity contracts (Issuers Portion Only) | company	1	2
Derivative instruments not designated as hedging instruments | Equity, Private Companies
Derivative Liability [Abstract]
Number of companies that Issued the equity contracts (Issuers Portion Only) | company	12	17

Derivatives (Net Gains (Losses)

Derivatives (Net Gains (Losses) on Derivatives Designated as Hedges) (Details) - Derivative instruments designated as hedging instruments - Fair Value Hedging - Interest Expense - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Certificates of deposits
Derivative [Line Items]
Recognized on certificates of deposit	$ 0	$ (1,605)	$ (2,536)
Interest rate contracts
Derivative [Line Items]
Recognized on interest rate swaps	$ 0	$ 3,146	$ 2,655

Derivatives (Narrative) (Detail

Derivatives (Narrative) (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)BoeMMBTUcompany	Dec. 31, 2020USD ($)BoeMMBTUcompany
Derivative [Line Items]
Derivative liabilities - Fair Value	$ 390,171	$ 424,828
Derivative assets - Fair value	$ 484,184	$ 602,754
Foreign exchange contracts
Derivative [Line Items]
Original maturity (in years)	1 year	1 year
Credit-Risk-Related Contingent Features
Derivative [Line Items]
Associated posted collateral	$ 66,600	$ 106,800
Aggregate fair value of derivative instruments in net liability position	66,800	107,400
Derivative instruments designated as hedging instruments
Derivative [Line Items]
Notional amount	361,531	359,269
Derivative liabilities - Fair Value	282	2,099
Derivative assets - Fair value	0	0
Derivative instruments designated as hedging instruments | Interest rate contracts | Cash Flow Hedging
Derivative [Line Items]
Notional amount	275,000	275,000
Net unrealized gains, net of tax, recorded in AOCI expected to be reclassified into earnings during the next 12 months	28
Derivative liabilities - Fair Value	57	1,864
Derivative assets - Fair value	0	0
Derivative instruments designated as hedging instruments | Interest rate contracts | Fair Value Hedging
Derivative [Line Items]
Derivative assets - Fair value	0	0
Derivative instruments not designated as hedging instruments
Derivative [Line Items]
Notional amount	19,522,661	21,341,158
Derivative liabilities - Fair Value	389,889	422,729
Derivative assets - Fair value	484,184	602,754
Derivative instruments not designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	1,874,681	3,108,488
Derivative liabilities - Fair Value	15,276	22,524
Derivative assets - Fair value	21,033	30,300
Derivative instruments not designated as hedging instruments | Interest rate contracts
Derivative [Line Items]
Notional amount	17,575,420	18,155,678
Derivative liabilities - Fair Value	179,905	315,834
Derivative assets - Fair value	240,222	489,132
Derivative instruments not designated as hedging instruments | Credit contracts
Derivative [Line Items]
Notional amount	72,560	76,992
Derivative liabilities - Fair Value	141	206
Derivative assets - Fair value	$ 0	$ 13
Weighted average remaining maturity of outstanding RPAs	3 years 2 months 12 days	3 years 6 months
Derivative instruments not designated as hedging instruments | Credit contracts | RPAs - protection sold
Derivative [Line Items]
Maximum exposure of RPAs with protection sold	$ 3,200	$ 6,000
Derivative instruments not designated as hedging instruments | Equity, Private Companies
Derivative [Line Items]
Number of companies that Issued the equity contracts (Issuers Portion Only) | company	12	17
Derivative instruments not designated as hedging instruments | Equity, Public Companies
Derivative [Line Items]
Number of companies that Issued the equity contracts (Issuers Portion Only) | company	1	2
Derivative instruments not designated as hedging instruments | Equity contracts
Derivative [Line Items]
Notional amount	$ 0	$ 0
Derivative liabilities - Fair Value	0	0
Derivative assets - Fair value	220	858
Derivative instruments not designated as hedging instruments | Commodity contracts
Derivative [Line Items]
Notional amount	0	0
Derivative liabilities - Fair Value	194,567	84,165
Derivative assets - Fair value	222,709	82,451
Financial Counterparty | Derivative instruments not designated as hedging instruments | Interest rate contracts
Derivative [Line Items]
Notional amount	8,800,000	9,090,000
London Clearing House | Derivative instruments not designated as hedging instruments | Interest rate contracts
Derivative [Line Items]
Notional amount	2,790,000	2,980,000
Derivative liabilities - Fair Value	79,900	187,400
Derivative assets - Fair value	18,100	1,300
Chicago Mercantile Exchange (CME) | Derivative instruments not designated as hedging instruments | Commodity contracts
Derivative [Line Items]
Derivative liabilities - Fair Value	25,800	3,700
Derivative assets - Fair value	$ 2,200	$ 7,900
Chicago Mercantile Exchange (CME) | Derivative instruments not designated as hedging instruments | Commodity contracts | Oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	1,036	1,275
Chicago Mercantile Exchange (CME) | Derivative instruments not designated as hedging instruments | Commodity contracts | Natural Gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	11,490	29,733

Derivatives (Gains (Losses) in

Derivatives (Gains (Losses) in Cash Flow Hedge and Net Investment Hedge) (Details) - Derivative instruments designated as hedging instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flow Hedging | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in AOCI	$ 1,210	$ (1,604)	$ 0
(Losses) gains reclassified from AOCI to interest expense	(868)	113	0
Net investment hedges | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in AOCI	$ (3,264)	$ (4,801)	$ (471)

Derivatives (Derivatives Not De

Derivatives (Derivatives Not Designated as Hedging Instruments - Interest Rate Contracts) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative assets - Fair value	$ 484,184	$ 602,754
Derivative liabilities - Fair Value	390,171	424,828
Derivative instruments not designated as hedging instruments
Derivative [Line Items]
Notional amount	19,522,661	21,341,158
Derivative assets - Fair value	484,184	602,754
Derivative liabilities - Fair Value	389,889	422,729
Derivative instruments not designated as hedging instruments | Interest rate contracts
Derivative [Line Items]
Notional amount	17,575,420	18,155,678
Derivative assets - Fair value	240,222	489,132
Derivative liabilities - Fair Value	179,905	315,834
Derivative instruments not designated as hedging instruments | Financial Counterparty | Interest rate contracts
Derivative [Line Items]
Notional amount	8,800,000	9,090,000
Interest rate contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Written options
Derivative [Line Items]
Notional amount	1,118,074	957,393
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	2,148	115
Interest rate contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Sold collars and corridors
Derivative [Line Items]
Notional amount	194,181	518,477
Derivative assets - Fair value	1,272	7,673
Derivative liabilities - Fair Value	642	0
Interest rate contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Swaps
Derivative [Line Items]
Notional amount	7,460,836	7,586,414
Derivative assets - Fair value	211,727	479,634
Derivative liabilities - Fair Value	39,650	1,364
Interest rate contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Interest rate contracts
Derivative [Line Items]
Notional amount	8,773,091	9,062,284
Derivative assets - Fair value	212,999	487,307
Derivative liabilities - Fair Value	42,440	1,479
Interest rate contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Purchased options
Derivative [Line Items]
Notional amount	1,118,074	957,393
Derivative assets - Fair value	2,159	101
Derivative liabilities - Fair Value	0	15
Interest rate contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Collars and corridors
Derivative [Line Items]
Notional amount	194,181	518,477
Derivative assets - Fair value	646	0
Derivative liabilities - Fair Value	1,275	7,717
Interest rate contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Swaps
Derivative [Line Items]
Notional amount	7,490,074	7,617,524
Derivative assets - Fair value	24,418	1,724
Derivative liabilities - Fair Value	136,190	306,623
Interest rate contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Interest rate contracts
Derivative [Line Items]
Notional amount	8,802,329	9,093,394
Derivative assets - Fair value	27,223	1,825
Derivative liabilities - Fair Value	$ 137,465	$ 314,355

Derivatives (Derivatives Not _2

Derivatives (Derivatives Not Designated as Hedging Instruments - Foreign Exchange Contracts) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative assets - Fair value	$ 484,184	$ 602,754
Derivative liabilities - Fair Value	390,171	424,828
Derivative instruments not designated as hedging instruments
Derivative [Line Items]
Notional amount	19,522,661	21,341,158
Derivative assets - Fair value	484,184	602,754
Derivative liabilities - Fair Value	389,889	422,729
Derivative instruments not designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	1,874,681	3,108,488
Derivative assets - Fair value	21,033	30,300
Derivative liabilities - Fair Value	15,276	22,524
Foreign exchange contracts | Customer Counterparty | Derivative instruments not designated as hedging instruments | Forwards and spot
Derivative [Line Items]
Notional amount	900,290	1,522,888
Derivative assets - Fair value	13,688	17,575
Derivative liabilities - Fair Value	9,446	17,928
Foreign exchange contracts | Customer Counterparty | Derivative instruments not designated as hedging instruments | Swaps
Derivative [Line Items]
Notional amount	66,474	13,590
Derivative assets - Fair value	1,034	872
Derivative liabilities - Fair Value	17	91
Foreign exchange contracts | Customer Counterparty | Derivative instruments not designated as hedging instruments | Written options
Derivative [Line Items]
Notional amount	20,287	117,729
Derivative assets - Fair value	1	0
Derivative liabilities - Fair Value	0	574
Foreign exchange contracts | Customer Counterparty | Derivative instruments not designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	987,051	1,654,207
Derivative assets - Fair value	14,723	18,447
Derivative liabilities - Fair Value	9,463	18,593
Foreign exchange contracts | Financial Counterparty | Derivative instruments not designated as hedging instruments | Forwards and spot
Derivative [Line Items]
Notional amount	267,689	145,197
Derivative assets - Fair value	1,564	1,230
Derivative liabilities - Fair Value	2,695	273
Foreign exchange contracts | Financial Counterparty | Derivative instruments not designated as hedging instruments | Swaps
Derivative [Line Items]
Notional amount	599,654	1,191,355
Derivative assets - Fair value	4,745	10,049
Derivative liabilities - Fair Value	3,116	3,658
Foreign exchange contracts | Financial Counterparty | Derivative instruments not designated as hedging instruments | Purchased options
Derivative [Line Items]
Notional amount	20,287	117,729
Derivative assets - Fair value	1	574
Derivative liabilities - Fair Value	2	0
Foreign exchange contracts | Financial Counterparty | Derivative instruments not designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	887,630	1,454,281
Derivative assets - Fair value	6,310	11,853
Derivative liabilities - Fair Value	$ 5,813	$ 3,931

Derivatives (Derivatives Not _3

Derivatives (Derivatives Not Designated as Hedging Instruments - Credit Contracts) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative assets - Fair value	$ 484,184	$ 602,754
Derivative liabilities - Fair Value	390,171	424,828
Derivative instruments not designated as hedging instruments
Derivative [Line Items]
Notional amount	19,522,661	21,341,158
Derivative assets - Fair value	484,184	602,754
Derivative liabilities - Fair Value	389,889	422,729
Derivative instruments not designated as hedging instruments | Credit contracts
Derivative [Line Items]
Notional amount	72,560	76,992
Derivative assets - Fair value	0	13
Derivative liabilities - Fair Value	141	206
Credit contracts | Derivative instruments not designated as hedging instruments | Other Credit Derivatives | RPAs - protection sold
Derivative [Line Items]
Notional amount	72,560	66,278
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	141	206
Credit contracts | Derivative instruments not designated as hedging instruments | Other Credit Derivatives | RPAs - protection purchased
Derivative [Line Items]
Notional amount	0	10,714
Derivative assets - Fair value	0	13
Derivative liabilities - Fair Value	0	0
Credit contracts | Derivative instruments not designated as hedging instruments | Credit contracts
Derivative [Line Items]
Notional amount	72,560	76,992
Derivative assets - Fair value	0	13
Derivative liabilities - Fair Value	$ 141	$ 206

Derivatives (Derivatives Not _4

Derivatives (Derivatives Not Designated as Hedging Instruments - Commodity Contracts) (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)MMBTUBoe	Dec. 31, 2020USD ($)BoeMMBTU
Derivative [Line Items]
Derivative assets - Fair value	$ 484,184	$ 602,754
Derivative liabilities - Fair Value	$ 390,171	$ 424,828
Customer Counterparty | Crude Oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	7,519	6,321
Customer Counterparty | Natural Gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	83,274	109,635
Derivative instruments not designated as hedging instruments
Derivative [Line Items]
Derivative assets - Fair value	$ 484,184	$ 602,754
Derivative liabilities - Fair Value	389,889	422,729
Derivative instruments not designated as hedging instruments | Commodity contracts
Derivative [Line Items]
Derivative assets - Fair value	222,709	82,451
Derivative liabilities - Fair Value	194,567	84,165
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Commodity contracts
Derivative [Line Items]
Derivative assets - Fair value	165,246	44,762
Derivative liabilities - Fair Value	$ 4,399	$ 43,978
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Written options
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	0
Derivative assets - Fair value	$ 87
Derivative liabilities - Fair Value	$ 0
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Collars
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	2,837	2,022
Derivative assets - Fair value	$ 33,826	$ 2,344
Derivative liabilities - Fair Value	$ 106	$ 2,193
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Swaps
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	4,682	4,299
Derivative assets - Fair value	$ 71,242	$ 9,282
Derivative liabilities - Fair Value	$ 60	$ 14,283
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Commodity contracts
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	7,519	6,321
Derivative assets - Fair value	$ 105,155	$ 11,626
Derivative liabilities - Fair Value	$ 166	$ 16,476
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Written options
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		597
Derivative assets - Fair value		$ 0
Derivative liabilities - Fair Value		$ 59
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Collars
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	24,315	12,733
Derivative assets - Fair value	$ 10,903	$ 1,063
Derivative liabilities - Fair Value	$ 458	$ 205
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Swaps
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	58,959	96,305
Derivative assets - Fair value	$ 49,188	$ 32,073
Derivative liabilities - Fair Value	$ 3,775	$ 27,238
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Commodity contracts
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	83,274	109,635
Derivative assets - Fair value	$ 60,091	$ 33,136
Derivative liabilities - Fair Value	4,233	27,502
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Commodity contracts
Derivative [Line Items]
Derivative assets - Fair value	57,463	37,689
Derivative liabilities - Fair Value	$ 190,168	$ 40,187
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Purchased options
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	0
Derivative assets - Fair value	$ 0
Derivative liabilities - Fair Value	$ 81
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Collars
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	2,888	2,022
Derivative assets - Fair value	$ 0	$ 2,217
Derivative liabilities - Fair Value	$ 33,399	$ 2,402
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Swaps
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	7,517	4,299
Derivative assets - Fair value	$ 27,524	$ 8,220
Derivative liabilities - Fair Value	$ 82,723	$ 7,135
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Commodity contracts
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	10,405	6,321
Derivative assets - Fair value	$ 27,524	$ 10,437
Derivative liabilities - Fair Value	$ 116,203	$ 9,537
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Purchased options
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		597
Derivative assets - Fair value		$ 59
Derivative liabilities - Fair Value		$ 0
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Collars
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	25,929	16,293
Derivative assets - Fair value	$ 1,136	$ 205
Derivative liabilities - Fair Value	$ 10,936	$ 813
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Swaps
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	109,567	103,973
Derivative assets - Fair value	$ 28,803	$ 26,988
Derivative liabilities - Fair Value	$ 63,029	$ 29,837
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Commodity contracts
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	135,496	120,863
Derivative assets - Fair value	$ 29,939	$ 27,252
Derivative liabilities - Fair Value	$ 73,965	$ 30,650

Derivatives (Net Gains (Losse_2

Derivatives (Net Gains (Losses) on Derivatives Not Designated as Hedging Instruments) (Details) - Derivative instruments not designated as hedging instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) recognized for derivative not designated as hedging instruments	$ 57,877	$ 25,563	$ 20,808
Interest rate contracts | Interest rate contracts and other derivative income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) recognized for derivative not designated as hedging instruments	11,493	(8,637)	(2,126)
Foreign exchange contracts | Foreign exchange income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) recognized for derivative not designated as hedging instruments	45,921	23,215	22,264
Credit contracts | Interest rate contracts and other derivative income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) recognized for derivative not designated as hedging instruments	139	(5)	59
Equity contracts | Lending fees
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) recognized for derivative not designated as hedging instruments	382	11,025	678
Commodity contracts | Interest rate contracts and other derivative income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) recognized for derivative not designated as hedging instruments	$ (58)	$ (35)	$ (67)

Derivatives (Offsetting of Deri

Derivatives (Offsetting of Derivatives) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Gross Amounts Recognized	$ 484,184	$ 602,754
Less: Master Netting Arrangements	(58,679)	(93,063)
Less: Cash collateral received or paid	(42,274)	(8,449)
Derivative asset, after netting	383,231	501,242
Less: Security Collateral Received	0	(35)
Net derivative assets	383,231	501,207
Contracts not subject to master netting arrangements, gross amounts recognized	587	1,100
Derivative, cash collateral received, including amount offset by fair value assets, and excess cash amount	(47,000)	15,800
Liabilities
Gross Amounts Recognized	390,171	424,828
Less: Master Netting Arrangements	(58,679)	(93,063)
Less: Cash collateral received/paid	(174,048)	(91,634)
Derivative liability, after netting	157,444	240,131
Less: Security Collateral Pledged	(106,598)	(221,150)
Net derivative liabilities	50,846	18,981
Contracts not subject to master netting arrangements, gross amounts recognized	666	220
Derivative, cash collateral posted against derivative liabilities, including amount offset the derivative fair value liabilities, and excess cash amount	$ 176,500	$ 91,600

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Credit Losses (Composition of Loans Held-for-Investment) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	$ 41,693,781	$ 38,390,955
Allowance for loan losses	(541,579)	(619,983)
Loans held-for-investment, net	41,152,202	37,770,972
Deferred loan fees, unearned fees, unamortized premiums and unaccreted discounts	(50,700)	(58,800)
CARES Act, Paycheck Protection Program
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Net origination fees	(5,700)	(12,700)
C&I | CARES Act, Paycheck Protection Program
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	534,200	1,570,000
Commercial Lending
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	30,327,746	28,440,027
Commercial Lending | C&I
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	14,150,608	13,631,726
Commercial Lending | CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	12,155,047	11,174,611
Commercial Lending | Residential loan | Multifamily
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	3,675,605	3,033,998
Commercial Lending | Construction and land
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	346,486	599,692
Commercial Lending | Total CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	16,177,138	14,808,301
Consumer Lending
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	11,366,035	9,950,928
Consumer Lending | Residential loan | Single-family
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	9,093,702	8,185,953
Consumer Lending | HELOCs
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	2,144,821	1,601,716
Consumer Lending | Total residential mortgage
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	11,238,523	9,787,669
Consumer Lending | Other consumer
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	$ 127,512	$ 163,259

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Credit Losses (Composition of Loans Held-for-Investment-Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Accrued interest receivable	$ 107,400	$ 107,500
Loans receivable pledged to secure borrowings and to provide additional borrowing capacity from the FHLB and the FRBSF	27,672,561	23,263,517
Commercial Lending
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Collateral dependent loans	37,000	97,200
Consumer Lending
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Collateral dependent loans	$ 14,000	$ 17,300

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Credit Losses (Credit Risk Ratings and/or Vintage Years for Loans Held-for-Investment by Portfolio Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 10,680,884	$ 9,787,213
2020	6,294,357	6,816,315
2019	5,104,045	5,125,324
2018	3,678,223	3,167,275
2017	2,400,331	1,547,971
Prior	3,686,038	3,277,221
Revolving Loans Amortized Cost Basis	9,612,862	8,390,152
Revolving Loans Converted to Term Loans Amortized Cost Basis	237,041	279,484
Loans held-for-investment	41,693,781	38,390,955
Pass [Member] | Federal Housing Administration Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual loans guaranteed by the FHA	1,600	747
Commercial Lending
Financing Receivable, Credit Quality Indicator [Line Items]
2021	8,046,445	7,390,682
2020	4,177,452	5,000,429
2019	3,721,211	3,619,488
2018	2,590,956	2,129,478
2017	1,622,234	1,013,095
Prior	2,486,373	2,244,535
Revolving Loans Amortized Cost Basis	7,647,844	6,993,769
Revolving Loans Converted to Term Loans Amortized Cost Basis	35,231	48,551
Loans held-for-investment	30,327,746	28,440,027
Commercial Lending | C&I
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,026,214	4,034,455
2020	1,253,234	1,577,608
2019	701,797	562,750
2018	239,265	283,807
2017	156,829	75,933
Prior	245,775	253,079
Revolving Loans Amortized Cost Basis	7,498,652	6,814,607
Revolving Loans Converted to Term Loans Amortized Cost Basis	28,842	29,487
Loans held-for-investment	14,150,608	13,631,726
Commercial Lending | C&I | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	3,911,722	3,912,147
2020	1,133,085	1,477,740
2019	629,007	483,725
2018	187,195	245,594
2017	132,392	69,482
Prior	225,326	245,615
Revolving Loans Amortized Cost Basis	7,383,485	6,431,003
Revolving Loans Converted to Term Loans Amortized Cost Basis	28,842	29,487
Loans held-for-investment	13,631,054	12,894,793
Commercial Lending | C&I | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	85,036	120,183
2020	117,357	74,601
2019	72,277	56,785
2018	51,553	19,426
2017	15,136	1,487
Prior	4,005	5,872
Revolving Loans Amortized Cost Basis	115,167	324,640
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	460,531	602,994
Commercial Lending | C&I | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	29,456	2,125
2020	2,792	25,267
2019	513	22,240
2018	517	18,787
2017	9,301	4,964
Prior	16,444	1,592
Revolving Loans Amortized Cost Basis	0	58,964
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	59,023	133,939
Commercial Lending | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,867,598	2,344,108
2020	2,093,703	2,465,790
2019	2,239,696	2,396,262
2018	1,884,558	1,427,625
2017	1,150,285	734,788
Prior	1,784,150	1,613,707
Revolving Loans Amortized Cost Basis	128,668	173,267
Revolving Loans Converted to Term Loans Amortized Cost Basis	6,389	19,064
Loans held-for-investment	12,155,047	11,174,611
Commercial Lending | CRE | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,792,193	2,296,649
2020	2,090,503	2,402,136
2019	2,230,520	2,310,748
2018	1,863,481	1,328,251
2017	1,120,682	732,694
Prior	1,727,862	1,529,681
Revolving Loans Amortized Cost Basis	128,668	173,267
Revolving Loans Converted to Term Loans Amortized Cost Basis	6,389	19,064
Loans held-for-investment	11,960,298	10,792,490
Commercial Lending | CRE | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	71,055	47,459
2020	3,200	63,654
2019	9,176	43,447
2018	21,077	98,259
2017	24,851	2,094
Prior	55,892	80,662
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	185,251	335,575
Commercial Lending | CRE | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,350	0
2020	0	0
2019	0	42,067
2018	0	1,115
2017	4,752	0
Prior	396	3,364
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	9,498	46,546
Commercial Lending | Real estate loan | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,026,295	783,671
2020	726,772	784,324
2019	689,174	503,764
2018	441,663	418,046
2017	315,120	181,477
Prior	456,057	356,821
Revolving Loans Amortized Cost Basis	20,524	5,895
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	3,675,605	3,033,998
Commercial Lending | Real estate loan | Multifamily | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,026,295	783,671
2020	726,772	783,589
2019	688,453	479,959
2018	419,319	411,945
2017	308,087	181,213
Prior	424,947	348,751
Revolving Loans Amortized Cost Basis	20,524	5,895
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	3,614,397	2,995,023
Commercial Lending | Real estate loan | Multifamily | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	735
2019	721	22,330
2018	22,344	6,101
2017	7,033	264
Prior	30,666	5,877
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	60,764	35,307
Commercial Lending | Real estate loan | Multifamily | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	1,475
2018	0	0
2017	0	0
Prior	444	2,193
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	444	3,668
Commercial Lending | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
2021	126,338	228,448
2020	103,743	172,707
2019	90,544	156,712
2018	25,470	0
2017	0	20,897
Prior	391	20,928
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	346,486	599,692
Commercial Lending | Construction and land | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	122,983	224,924
2020	103,743	172,707
2019	90,544	156,712
2018	3,412	0
2017	0	20,897
Prior	391	1,028
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	321,073	576,268
Commercial Lending | Construction and land | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	3,355	3,524
2020	0	0
2019	0	0
2018	22,058	0
2017	0	0
Prior	0	19,900
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	25,413	23,424
Commercial Lending | Construction and land | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	0	0
Commercial Lending | Total CRE
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,020,231	3,356,227
2020	2,924,218	3,422,821
2019	3,019,414	3,056,738
2018	2,351,691	1,845,671
2017	1,465,405	937,162
Prior	2,240,598	1,991,456
Revolving Loans Amortized Cost Basis	149,192	179,162
Revolving Loans Converted to Term Loans Amortized Cost Basis	6,389	19,064
Loans held-for-investment	16,177,138	14,808,301
Consumer Lending
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,634,439	2,396,531
2020	2,116,905	1,815,886
2019	1,382,834	1,505,836
2018	1,087,267	1,037,797
2017	778,097	534,876
Prior	1,199,665	1,032,686
Revolving Loans Amortized Cost Basis	1,965,018	1,396,383
Revolving Loans Converted to Term Loans Amortized Cost Basis	201,810	230,933
Loans held-for-investment	11,366,035	9,950,928
Consumer Lending | Real estate loan | Single-family
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,616,958	2,385,853
2020	2,108,370	1,814,855
2019	1,378,138	1,502,472
2018	1,085,732	1,023,496
2017	769,545	525,283
Prior	1,134,959	933,994
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	9,093,702	8,185,953
Consumer Lending | Real estate loan | Single-family | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,616,958	2,385,853
2020	2,108,370	1,813,200
2019	1,375,929	1,501,660
2018	1,079,030	1,021,707
2017	763,351	523,170
Prior	1,127,516	921,714
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	9,071,154	8,167,304
Consumer Lending | Real estate loan | Single-family | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	1,429
2019	458	0
2018	2,813	0
2017	1,899	119
Prior	3,212	1,034
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	8,382	2,582
Consumer Lending | Real estate loan | Single-family | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	226
2019	1,751	812
2018	3,889	1,789
2017	4,295	1,994
Prior	4,231	11,246
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	14,166	16,067
Consumer Lending | HELOCs
Financing Receivable, Credit Quality Indicator [Line Items]
2021	648	1,131
2020	3,277	1,031
2019	4,696	3,364
2018	1,535	9,980
2017	6,811	9,593
Prior	12,559	15,437
Revolving Loans Amortized Cost Basis	1,913,485	1,330,247
Revolving Loans Converted to Term Loans Amortized Cost Basis	201,810	230,933
Loans held-for-investment	2,144,821	1,601,716
Consumer Lending | HELOCs | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	648	1,131
2020	3,277	880
2019	4,644	2,879
2018	1,347	5,363
2017	3,268	8,433
Prior	11,215	13,475
Revolving Loans Amortized Cost Basis	1,913,478	1,328,919
Revolving Loans Converted to Term Loans Amortized Cost Basis	197,414	225,810
Loans held-for-investment	2,135,291	1,586,890
Consumer Lending | HELOCs | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	200
2018	0	0
2017	0	996
Prior	371	0
Revolving Loans Amortized Cost Basis	7	1,328
Revolving Loans Converted to Term Loans Amortized Cost Basis	708	606
Loans held-for-investment	1,086	3,130
Consumer Lending | HELOCs | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	151
2019	52	285
2018	188	4,617
2017	3,543	164
Prior	973	1,962
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	3,688	4,517
Loans held-for-investment	8,444	11,696
Consumer Lending | Total residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,617,606	2,386,984
2020	2,111,647	1,815,886
2019	1,382,834	1,505,836
2018	1,087,267	1,033,476
2017	776,356	534,876
Prior	1,147,518	949,431
Revolving Loans Amortized Cost Basis	1,913,485	1,330,247
Revolving Loans Converted to Term Loans Amortized Cost Basis	201,810	230,933
Loans held-for-investment	11,238,523	9,787,669
Consumer Lending | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	16,833	9,547
2020	5,258	0
2019	0	0
2018	0	4,321
2017	1,741	0
Prior	52,147	83,255
Revolving Loans Amortized Cost Basis	51,533	66,136
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	127,512	163,259
Consumer Lending | Other consumer | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	16,831	9,531
2020	5,258	0
2019	0	0
2018	0	1,830
2017	1,741	0
Prior	52,147	83,255
Revolving Loans Amortized Cost Basis	51,481	66,136
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	127,458	160,752
Consumer Lending | Other consumer | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2	16
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	2	16
Consumer Lending | Other consumer | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	2,491
2017	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	52	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Loans held-for-investment	$ 52	$ 2,491

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Credit Losses - (Narrative for Credit Risk Ratings and/or Vintage Years for Loans Held-for-Investment by Portfolio Segment) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)loan
HELOCs
Financing Receivable, Credit Quality Indicator [Line Items]
Amount converted to loans	$ 54,100	$ 145,000
C&I
Financing Receivable, Credit Quality Indicator [Line Items]
Amount converted to loans	$ 78	$ 23,900
Number of converted loans | loan	1	4
CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Amount converted to loans	$ 6,400
Number of converted loans | loan	3

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses (Aging Analysis on Loans Held-for-Investment) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	$ 93,181	$ 215,154
Total loans	41,693,781	38,390,955
Commercial Lending
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	68,965	184,153
Total loans	30,327,746	28,440,027
Commercial Lending | C&I
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	59,023	133,939
Total loans	14,150,608	13,631,726
Commercial Lending | CRE
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	9,498	46,546
Total loans	12,155,047	11,174,611
Commercial Lending | Residential loan | Multifamily
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	444	3,668
Total loans	3,675,605	3,033,998
Commercial Lending | Construction and land
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	0	0
Total loans	346,486	599,692
Commercial Lending | Total CRE
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	9,942	50,214
Total loans	16,177,138	14,808,301
Consumer Lending
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	24,216	31,001
Total loans	11,366,035	9,950,928
Consumer Lending | Residential loan | Single-family
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	15,720	16,814
Total loans	9,093,702	8,185,953
Consumer Lending | HELOCs
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	8,444	11,696
Total loans	2,144,821	1,601,716
Consumer Lending | Total residential mortgage
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	24,164	28,510
Total loans	11,238,523	9,787,669
Consumer Lending | Other consumer
Nonaccrual and Past Due Loans
Financing receivable, nonaccrual	52	2,491
Total loans	127,512	163,259
Current Accruing Loans
Nonaccrual and Past Due Loans
Total loans	41,555,745	38,125,211
Current Accruing Loans | Commercial Lending
Nonaccrual and Past Due Loans
Total loans	30,238,648	28,224,064
Current Accruing Loans | Commercial Lending | C&I
Nonaccrual and Past Due Loans
Total loans	14,080,516	13,488,070
Current Accruing Loans | Commercial Lending | CRE
Nonaccrual and Past Due Loans
Total loans	12,141,827	11,127,690
Current Accruing Loans | Commercial Lending | Residential loan | Multifamily
Nonaccrual and Past Due Loans
Total loans	3,669,819	3,028,512
Current Accruing Loans | Commercial Lending | Construction and land
Nonaccrual and Past Due Loans
Total loans	346,486	579,792
Current Accruing Loans | Commercial Lending | Total CRE
Nonaccrual and Past Due Loans
Total loans	16,158,132	14,735,994
Current Accruing Loans | Consumer Lending
Nonaccrual and Past Due Loans
Total loans	11,317,097	9,901,147
Current Accruing Loans | Consumer Lending | Residential loan | Single-family
Nonaccrual and Past Due Loans
Total loans	9,059,222	8,156,645
Current Accruing Loans | Consumer Lending | HELOCs
Nonaccrual and Past Due Loans
Total loans	2,130,523	1,583,968
Current Accruing Loans | Consumer Lending | Total residential mortgage
Nonaccrual and Past Due Loans
Total loans	11,189,745	9,740,613
Current Accruing Loans | Consumer Lending | Other consumer
Nonaccrual and Past Due Loans
Total loans	127,352	160,534
Accruing Loans 30-59  Days Past Due
Nonaccrual and Past Due Loans
Total loans	31,091	44,136
Accruing Loans 30-59  Days Past Due | Commercial Lending
Nonaccrual and Past Due Loans
Total loans	16,025	31,086
Accruing Loans 30-59  Days Past Due | Commercial Lending | C&I
Nonaccrual and Past Due Loans
Total loans	6,983	8,993
Accruing Loans 30-59  Days Past Due | Commercial Lending | CRE
Nonaccrual and Past Due Loans
Total loans	3,722	375
Accruing Loans 30-59  Days Past Due | Commercial Lending | Residential loan | Multifamily
Nonaccrual and Past Due Loans
Total loans	5,320	1,818
Accruing Loans 30-59  Days Past Due | Commercial Lending | Construction and land
Nonaccrual and Past Due Loans
Total loans	0	19,900
Accruing Loans 30-59  Days Past Due | Commercial Lending | Total CRE
Nonaccrual and Past Due Loans
Total loans	9,042	22,093
Accruing Loans 30-59  Days Past Due | Consumer Lending
Nonaccrual and Past Due Loans
Total loans	15,066	13,050
Accruing Loans 30-59  Days Past Due | Consumer Lending | Residential loan | Single-family
Nonaccrual and Past Due Loans
Total loans	10,191	9,911
Accruing Loans 30-59  Days Past Due | Consumer Lending | HELOCs
Nonaccrual and Past Due Loans
Total loans	4,776	2,922
Accruing Loans 30-59  Days Past Due | Consumer Lending | Total residential mortgage
Nonaccrual and Past Due Loans
Total loans	14,967	12,833
Accruing Loans 30-59  Days Past Due | Consumer Lending | Other consumer
Nonaccrual and Past Due Loans
Total loans	99	217
Accruing Loans 60-89  Days Past Due
Nonaccrual and Past Due Loans
Total loans	13,764	6,454
Accruing Loans 60-89  Days Past Due | Commercial Lending
Nonaccrual and Past Due Loans
Total loans	4,108	724
Accruing Loans 60-89  Days Past Due | Commercial Lending | C&I
Nonaccrual and Past Due Loans
Total loans	4,086	724
Accruing Loans 60-89  Days Past Due | Commercial Lending | CRE
Nonaccrual and Past Due Loans
Total loans	0	0
Accruing Loans 60-89  Days Past Due | Commercial Lending | Residential loan | Multifamily
Nonaccrual and Past Due Loans
Total loans	22	0
Accruing Loans 60-89  Days Past Due | Commercial Lending | Construction and land
Nonaccrual and Past Due Loans
Total loans	0	0
Accruing Loans 60-89  Days Past Due | Commercial Lending | Total CRE
Nonaccrual and Past Due Loans
Total loans	22	0
Accruing Loans 60-89  Days Past Due | Consumer Lending
Nonaccrual and Past Due Loans
Total loans	9,656	5,730
Accruing Loans 60-89  Days Past Due | Consumer Lending | Residential loan | Single-family
Nonaccrual and Past Due Loans
Total loans	8,569	2,583
Accruing Loans 60-89  Days Past Due | Consumer Lending | HELOCs
Nonaccrual and Past Due Loans
Total loans	1,078	3,130
Accruing Loans 60-89  Days Past Due | Consumer Lending | Total residential mortgage
Nonaccrual and Past Due Loans
Total loans	9,647	5,713
Accruing Loans 60-89  Days Past Due | Consumer Lending | Other consumer
Nonaccrual and Past Due Loans
Total loans	9	17
Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Total loans	44,855	50,590
Total Accruing Past Due Loans | Commercial Lending
Nonaccrual and Past Due Loans
Total loans	20,133	31,810
Total Accruing Past Due Loans | Commercial Lending | C&I
Nonaccrual and Past Due Loans
Total loans	11,069	9,717
Total Accruing Past Due Loans | Commercial Lending | CRE
Nonaccrual and Past Due Loans
Total loans	3,722	375
Total Accruing Past Due Loans | Commercial Lending | Residential loan | Multifamily
Nonaccrual and Past Due Loans
Total loans	5,342	1,818
Total Accruing Past Due Loans | Commercial Lending | Construction and land
Nonaccrual and Past Due Loans
Total loans	0	19,900
Total Accruing Past Due Loans | Commercial Lending | Total CRE
Nonaccrual and Past Due Loans
Total loans	9,064	22,093
Total Accruing Past Due Loans | Consumer Lending
Nonaccrual and Past Due Loans
Total loans	24,722	18,780
Total Accruing Past Due Loans | Consumer Lending | Residential loan | Single-family
Nonaccrual and Past Due Loans
Total loans	18,760	12,494
Total Accruing Past Due Loans | Consumer Lending | HELOCs
Nonaccrual and Past Due Loans
Total loans	5,854	6,052
Total Accruing Past Due Loans | Consumer Lending | Total residential mortgage
Nonaccrual and Past Due Loans
Total loans	24,614	18,546
Total Accruing Past Due Loans | Consumer Lending | Other consumer
Nonaccrual and Past Due Loans
Total loans	$ 108	$ 234

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Credit Losses (Amortized Cost of Loans on Nonaccrual Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	$ 42,887	$ 126,676
Commercial Lending
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	32,069	110,096
Commercial Lending | C&I
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	22,967	62,040
Commercial Lending | CRE
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	9,102	45,537
Commercial Lending | Total CRE
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	9,102	48,056
Commercial Lending | Real estate loan | Multifamily
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	0	2,519
Consumer Lending
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	10,818	16,580
Consumer Lending | Real estate loan | Single-family
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	5,785	6,013
Consumer Lending | HELOCs
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	5,033	8,076
Consumer Lending | Total residential mortgage
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	10,818	14,089
Consumer Lending | Other consumer
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	$ 0	$ 2,491

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Credit Losses (Foreclosed Assets Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Foreclosed assets	$ 10.3	$ 19.7
Residential real estate properties
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Recorded investment in consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process	$ 7.3	$ 4.1

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Credit Losses (Additions to TDRs) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan
Loans Modified as TDRs
Number of Loans | loan	6	17
Pre-Modification Outstanding Recorded Investment	$ 25,256	$ 174,898
Post-Modification Outstanding Recorded Investment	21,329	156,914
Financial Impact	$ 1,108	$ 19,573
Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			13
Pre-Modification Outstanding Recorded Investment			$ 117,100
Post-Modification Outstanding Recorded Investment			92,649
Financial Impact			$ 8,006
Commercial Lending
Loans Modified as TDRs
Number of Loans | loan	6	17
Pre-Modification Outstanding Recorded Investment	$ 25,256	$ 174,898
Post-Modification Outstanding Recorded Investment	21,329	156,914
Financial Impact	$ 1,108	$ 19,573
Commercial Lending | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			9
Pre-Modification Outstanding Recorded Investment			$ 115,438
Post-Modification Outstanding Recorded Investment			91,023
Financial Impact			$ 8,004
Commercial Lending | C&I
Loans Modified as TDRs
Number of Loans | loan	5	14
Pre-Modification Outstanding Recorded Investment	$ 24,155	$ 152,249
Post-Modification Outstanding Recorded Investment	20,263	134,467
Financial Impact	1,108	$ 19,555
Commercial Lending | C&I | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			8
Pre-Modification Outstanding Recorded Investment			$ 95,742
Post-Modification Outstanding Recorded Investment			71,332
Financial Impact			$ 8,004
Commercial Lending | CRE
Loans Modified as TDRs
Number of Loans | loan		2
Pre-Modification Outstanding Recorded Investment		$ 21,429
Post-Modification Outstanding Recorded Investment	$ 0	21,221
Financial Impact		$ 18
Commercial Lending | Residential loan | Multifamily
Loans Modified as TDRs
Number of Loans | loan	1	1
Pre-Modification Outstanding Recorded Investment	$ 1,101	$ 1,220
Post-Modification Outstanding Recorded Investment	1,066	1,226
Financial Impact	$ 0	$ 0
Commercial Lending | Construction and land | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			1
Pre-Modification Outstanding Recorded Investment			$ 19,696
Post-Modification Outstanding Recorded Investment			19,691
Financial Impact			$ 0
Commercial Lending | Total CRE
Loans Modified as TDRs
Number of Loans | loan	1	3
Pre-Modification Outstanding Recorded Investment	$ 1,101	$ 22,649
Post-Modification Outstanding Recorded Investment	1,066	22,447
Financial Impact	$ 0	$ 18
Commercial Lending | Total CRE | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			1
Pre-Modification Outstanding Recorded Investment			$ 19,696
Post-Modification Outstanding Recorded Investment			19,691
Financial Impact			$ 0
Consumer Lending | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			4
Pre-Modification Outstanding Recorded Investment			$ 1,662
Post-Modification Outstanding Recorded Investment			1,626
Financial Impact			$ 2
Consumer Lending | Residential loan | Single-family | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			2
Pre-Modification Outstanding Recorded Investment			$ 1,123
Post-Modification Outstanding Recorded Investment			1,098
Financial Impact			$ 2
Consumer Lending | HELOCs | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			2
Pre-Modification Outstanding Recorded Investment			$ 539
Post-Modification Outstanding Recorded Investment			528
Financial Impact			$ 0
Consumer Lending | Total residential mortgage | Non-PCI impaired loans
Loans Modified as TDRs
Number of Loans | loan			4
Pre-Modification Outstanding Recorded Investment			$ 1,662
Post-Modification Outstanding Recorded Investment			1,626
Financial Impact			$ 2

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Credit Losses (TDR Post-Modifications) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	$ 21,329	$ 156,914
Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			$ 92,649
Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	5,745	81,581
Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			31,611
Principal and Interest
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	10,863
Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			1,495
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	15,584	31,913
Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			19,691
Interest Deferments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	32,557
Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			39,852
Commercial Lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	21,329	156,914
Commercial Lending | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			91,023
Commercial Lending | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	5,745	81,581
Commercial Lending | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			31,611
Commercial Lending | Principal and Interest
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	10,863
Commercial Lending | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	15,584	31,913
Commercial Lending | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			19,691
Commercial Lending | Interest Deferments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	32,557
Commercial Lending | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			39,721
Commercial Lending | C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	20,263	134,467
Commercial Lending | C&I | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			71,332
Commercial Lending | C&I | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	4,679	59,134
Commercial Lending | C&I | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			31,611
Commercial Lending | C&I | Principal and Interest
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	10,863
Commercial Lending | C&I | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | C&I | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	15,584	31,913
Commercial Lending | C&I | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | C&I | Interest Deferments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	32,557
Commercial Lending | C&I | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | C&I | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | C&I | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			39,721
Commercial Lending | CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	21,221
Commercial Lending | CRE | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	21,221
Commercial Lending | CRE | Principal and Interest
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | CRE | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | CRE | Interest Deferments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | CRE | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Residential loan | Multifamily
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	1,066	1,226
Commercial Lending | Residential loan | Multifamily | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	1,066	1,226
Commercial Lending | Residential loan | Multifamily | Principal and Interest
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Residential loan | Multifamily | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Residential loan | Multifamily | Interest Deferments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Residential loan | Multifamily | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Residential loan | Construction and land | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			19,691
Commercial Lending | Residential loan | Construction and land | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Residential loan | Construction and land | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Residential loan | Construction and land | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			19,691
Commercial Lending | Residential loan | Construction and land | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Residential loan | Construction and land | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Construction and land | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			19,691
Commercial Lending | Total CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	1,066	22,447
Commercial Lending | Total CRE | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			19,691
Commercial Lending | Total CRE | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	1,066	22,447
Commercial Lending | Total CRE | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Total CRE | Principal and Interest
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Total CRE | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Total CRE | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Total CRE | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			19,691
Commercial Lending | Total CRE | Interest Deferments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	0	0
Commercial Lending | Total CRE | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Commercial Lending | Total CRE | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	$ 0	$ 0
Commercial Lending | Total CRE | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			1,626
Consumer Lending | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			1,495
Consumer Lending | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			131
Consumer Lending | Residential loan | Single-family | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			1,098
Consumer Lending | Residential loan | Single-family | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Residential loan | Single-family | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			1,098
Consumer Lending | Residential loan | Single-family | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Residential loan | Single-family | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Residential loan | Single-family | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | HELOCs | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			528
Consumer Lending | HELOCs | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | HELOCs | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			397
Consumer Lending | HELOCs | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | HELOCs | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | HELOCs | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			131
Consumer Lending | Total residential mortgage | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			1,626
Consumer Lending | Total residential mortgage | Principal | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Total residential mortgage | Principal and Interest | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			1,495
Consumer Lending | Total residential mortgage | Interest Rate Reduction | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Total residential mortgage | Interest Deferments | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			0
Consumer Lending | Total residential mortgage | Other | Non-PCI impaired loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			$ 131

Loans Receivable and Allowan_12

Loans Receivable and Allowance for Credit Losses (Loans Modified as TDRs that Subsequently Defaulted) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	1
Recorded Investment	$ 11,431	$ 15,852
Remaining TDR loan commitments	$ 5,000	$ 3,000
Commercial Lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	1
Recorded Investment	$ 11,431	$ 15,852
Commercial Lending | C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	1
Recorded Investment	$ 11,431	$ 15,852
Non-PCI loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan			3
Recorded Investment			$ 13,112
Non-PCI loans | Commercial Lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan			3
Recorded Investment			$ 13,112
Non-PCI loans | Commercial Lending | C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan			3
Recorded Investment			$ 13,112

Loans Receivable and Allowan_13

Loans Receivable and Allowance for Credit Losses (Summary of Activities in Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02		Accounting Standards Update 2016-13		Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	$ 311,322	$ 619,983	$ 358,287	$ 311,322
(Reversal of ) provision for credit losses on loans		(28,937)	198,691	100,093
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(66,592)	(81,837)	(75,067)
Gross recoveries		16,614	18,672	22,264
Total net (charge-offs) recoveries		(49,978)	(63,165)	(52,803)
Foreign currency translation adjustment		511	1,012	(325)
Allowance for loan losses, balance at the end of the period		541,579	619,983	358,287	$ 311,322
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			125,158
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				125,158
Commercial Lending | C&I
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	189,117	398,040	238,376	189,117
(Reversal of ) provision for credit losses on loans		(39,715)	145,212	109,068
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(32,490)	(66,225)	(73,985)
Gross recoveries		11,906	5,428	14,501
Total net (charge-offs) recoveries		(20,584)	(60,797)	(59,484)
Foreign currency translation adjustment		511	1,012	(325)
Allowance for loan losses, balance at the end of the period		338,252	398,040	238,376	189,117
Commercial Lending | C&I | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			74,237
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				74,237
Commercial Lending | CRE
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	40,666	163,791	40,509	40,666
(Reversal of ) provision for credit losses on loans		14,282	55,864	(4,345)
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(28,430)	(15,206)	(1,021)
Gross recoveries		1,297	10,455	5,209
Total net (charge-offs) recoveries		(27,133)	(4,751)	4,188
Foreign currency translation adjustment		0	0	0
Allowance for loan losses, balance at the end of the period		150,940	163,791	40,509	40,666
Commercial Lending | CRE | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			72,169
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				72,169
Commercial Lending | Residential loan | Multifamily
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	19,885	27,573	22,826	19,885
(Reversal of ) provision for credit losses on loans		(15,076)	10,879	1,085
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(130)	0	0
Gross recoveries		2,033	1,980	1,856
Total net (charge-offs) recoveries		1,903	1,980	1,856
Foreign currency translation adjustment		0	0	0
Allowance for loan losses, balance at the end of the period		14,400	27,573	22,826	19,885
Commercial Lending | Residential loan | Multifamily | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			(8,112)
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				(8,112)
Commercial Lending | Construction and land
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	20,290	10,239	19,404	20,290
(Reversal of ) provision for credit losses on loans		7,576	644	(1,422)
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(2,954)	0	0
Gross recoveries		607	80	536
Total net (charge-offs) recoveries		(2,347)	80	536
Foreign currency translation adjustment		0	0	0
Allowance for loan losses, balance at the end of the period		15,468	10,239	19,404	20,290
Commercial Lending | Construction and land | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			(9,889)
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				(9,889)
Consumer Lending | Residential loan | Single-family
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	31,340	15,520	28,527	31,340
(Reversal of ) provision for credit losses on loans		1,965	(9,922)	(2,938)
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(1,046)	0	(11)
Gross recoveries		721	585	136
Total net (charge-offs) recoveries		(325)	585	125
Foreign currency translation adjustment		0	0	0
Allowance for loan losses, balance at the end of the period		17,160	15,520	28,527	31,340
Consumer Lending | Residential loan | Single-family | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			(3,670)
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				(3,670)
Consumer Lending | HELOCs
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	5,774	2,690	5,265	5,774
(Reversal of ) provision for credit losses on loans		745	(605)	(516)
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(45)	(221)	0
Gross recoveries		45	49	7
Total net (charge-offs) recoveries		0	(172)	7
Foreign currency translation adjustment		0	0	0
Allowance for loan losses, balance at the end of the period		3,435	2,690	5,265	5,774
Consumer Lending | HELOCs | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			(1,798)
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				(1,798)
Consumer Lending | Other consumer
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period	$ 4,250	2,130	3,380	4,250
(Reversal of ) provision for credit losses on loans		1,286	(3,381)	(839)
Net Charge-Off/Recoveries [Abstract]
Gross charge-offs		(1,497)	(185)	(50)
Gross recoveries		5	95	19
Total net (charge-offs) recoveries		(1,492)	(90)	(31)
Foreign currency translation adjustment		0	0	0
Allowance for loan losses, balance at the end of the period		$ 1,924	2,130	3,380	$ 4,250
Consumer Lending | Other consumer | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			$ 2,221
Net Charge-Off/Recoveries [Abstract]
Allowance for loan losses, balance at the end of the period				$ 2,221

Loans Receivable and Allowan_14

Loans Receivable and Allowance for Credit Losses (Summary of Activities in Allowance for loan losses by Portfolio Segments and Unfunded Credit Commitments) (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02		Accounting Standards Update 2016-13		Accounting Standards Update 2016-13
Allowance for unfunded credit reserves
Allowance for Unfunded Credit Commitments		$ 33,500
(Reversal of) provision for credit losses		(35,000)	$ 210,653	$ 98,685
Allowance for Unfunded Credit Commitments		27,500	33,500
Unfunded Loan Commitment
Allowance for unfunded credit reserves
Allowance for Unfunded Credit Commitments	$ 12,566	33,577	11,158	12,566
(Reversal of) provision for credit losses		(6,063)	11,962	(1,408)
Allowance for Unfunded Credit Commitments		$ 27,514	33,577	11,158	$ 12,566
Cumulative Effect, Period of Adoption, Adjustment
Allowance for unfunded credit reserves
Allowance for Unfunded Credit Commitments			$ 10,457
Allowance for Unfunded Credit Commitments				$ 10,457

Loans Receivable and Allowan_15

Loans Receivable and Allowance for Credit Losses (Allowance for Credit Losses Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses
Financing receivable and off balance sheet credit loss allowance	$ 569,100	$ 653,600
Decrease in allowance for credit losses	$ (84,500)
Decrease in allowance for credit losses, percent	13.00%
(Reversal of) provision for credit losses	$ (35,000)	$ 210,653	$ 98,685
Commercial and Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Decrease in allowance for loan losses	(78,400)
Decrease in allowance for unfunded credit commitments	$ (6,100)

Loans Receivable and Allowan_16

Loans Receivable and Allowance for Credit Losses (Loans Held-for-Sale Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Single Family Residential with recourse | Residential loan
LOANS HELD-FOR-SALE
Loans held-for-sale	$ 635	$ 1,800

Loans Receivable and Allowan_17

Loans Receivable and Allowance for Credit Losses (Loans Purchases, Sales and Transfers) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans transferred from held-for-investment to held-for-sale	$ 599,610	$ 329,069	$ 285,637
Sales	621,543	412,221	296,836
Purchases	1,044,711	389,580	523,830
Write-downs to the allowance for loan losses related to loans transferred from held-for-investment to held-for-sale	12,200	2,800	789
Net gains on sales of loans	8,909	4,501	4,035
C&I | Loans receivable, originated
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Sales	413,100	400,400	230,300
Loans Sold in Secondary Market | Loans receivable, purchased
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Sales	208,400	11,800	66,500
Commercial Lending | C&I
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans transferred from held-for-investment to held-for-sale	496,655	300,677	245,002
Sales	502,694	303,520	245,791
Purchases	479,690	154,154	397,615
Commercial Lending | CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans transferred from held-for-investment to held-for-sale	78,834	26,994	39,062
Sales	78,834	26,994	39,062
Purchases	0	0	0
Commercial Lending | Residential loan | Multifamily
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans transferred from held-for-investment to held-for-sale	0	1,398	0
Sales	0	1,398	0
Purchases	370	2,358	8,988
Commercial Lending | Construction and land
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans transferred from held-for-investment to held-for-sale	18,883	0	1,573
Sales	21,557	0	1,573
Purchases	0	0	0
Consumer Lending | Residential loan | Single-family
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans transferred from held-for-investment to held-for-sale	5,238	0	0
Sales	18,458	80,309	10,410
Purchases	$ 564,651	$ 233,068	$ 117,227

Investments in Qualified Affo_3

Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Investments in Qualified Affordable Housing Partnerships, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments in Qualified Affordable Housing Partnerships, Net [Abstract]
Minimum compliance period to fully utilize tax credits	15 years
Investments in qualified affordable housing partnerships, net	$ 289,741	$ 213,555
Accrued expenses and other liabilities — Unfunded commitments	146,152	77,444
Tax credits and other tax benefits recognized	50,591	45,971	$ 46,034
Amortization expense included in income tax expense	$ 33,248	$ 37,132	$ 36,561

Investments in Qualified Affo_4

Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Investments in Tax Credit and Other Investments, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments in Tax Credit and Other Investments, Net
Investments in tax credit and other investments, net	$ 338,522	$ 266,525
Accrued expenses and other liabilities — Unfunded commitments	163,464	105,282
Amortization of tax credit and other investments	122,457	70,082	$ 98,383
Unrealized gain (loss) recognized on marketable equity securities held	(746)	732
New equity securities without readily determinable fair value - OTTI charges	0	360
Impairment on OREO and other foreclosed assets	5,151	3,717	9
Total	309,616
Investment in Tax Credit and Other Investments
Investments in Tax Credit and Other Investments, Net
Pre-tax recoveries	1,300	1,500	1,600
Impairment on OREO and other foreclosed assets	0	4,800	$ 14,600
Investments in tax credit and other investments, net
Investments in Tax Credit and Other Investments, Net
Equity securities with readily determinable fair value	26,600	31,300
Other assets and investments in tax credit other investments, net
Investments in Tax Credit and Other Investments, Net
Equity securities without readily determinable fair value, amount	$ 33,100	$ 23,700

Investments in Qualified Affo_5

Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Estimated Unfunded Commitments) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Unfunded commitments related to investments in qualified affordable housing partnerships, tax credit and other investments
2022	$ 174,475
2023	109,622
2024	5,751
2025	14,847
2026	978
Thereafter	3,943
Total	$ 309,616

Investments in Qualified Affo_6

Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Variable Interest Entities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments in Tax Credit and Other Investments, Net [Line Items]
Fair Value	$ 9,965,353	$ 5,544,658
Collateralized loan obligations (“CLOs”)
Investments in Tax Credit and Other Investments, Net [Line Items]
Fair Value	589,950	287,494
Collateralized loan obligations (“CLOs”) | Debt securities available for sale
Investments in Tax Credit and Other Investments, Net [Line Items]
Fair Value	$ 291,700	$ 287,500

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 465,697	$ 465,697

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Core Deposit Intangibles) (Details) - Core Deposit Intangibles - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross balance	$ 86,099,000	$ 86,099,000
Accumulated amortization	(82,471,000)	(79,722,000)
Net carrying balance	3,628,000	6,377,000
Impairment write-offs/write downs on the remaining core deposit intangibles	$ 0	$ 0	$ 0

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Amortization Expense of Core Deposit Intangibles) (Details) - Core Deposit Intangibles - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense related to the core deposit intangible assets	$ 2,700	$ 3,600	$ 4,500
Estimated future amortization expense
2022	1,865
2023	1,199
2024	553
2025	11
Net carrying balance	$ 3,628	$ 6,377

Deposits (Balances for Core Dep

Deposits (Balances for Core Deposits and Time Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Core Deposits
Noninterest-bearing demand	$ 22,845,464	$ 16,298,301
Interest-bearing checking	6,524,721	6,142,193
Money market	13,130,300	10,740,667
Savings	2,888,065	2,681,242
Time deposits	7,961,982
Total deposits	53,350,532	44,862,752
Time deposits:
Time deposits, at or above FDIC insurance limit	5,950,000	6,620,000
Domestic office
Core Deposits
Time deposits	6,940,013	8,159,641
Foreign office
Core Deposits
Time deposits	$ 1,021,969	$ 840,708

Deposits (Scheduled Maturities

Deposits (Scheduled Maturities of Time Deposits) (Details) $ in Thousands	Dec. 31, 2021USD ($)
DEPOSIT ACCOUNTS
2022	$ 7,605,509
2023	285,518
2024	57,727
2025	6,545
2026	6,668
Thereafter	15
Total	$ 7,961,982

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances and Long-Term Debt (FHLB Advances and LTD) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Federal Home Loan Bank (“FHLB”) advances	$ 249,331	$ 652,612
Available borrowing capacity from FHLB advances	$ 11,930,000	$ 6,330,000
FHLB Advances
Debt Instrument [Line Items]
Weighted-average rate (as a percent)	1.17%	1.77%
Parent Company
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 147,658	$ 147,376
Weighted-average rate (as a percent)	1.74%	2.26%
Bank | FHLB - Fixed
Debt Instrument [Line Items]
Federal Home Loan Bank (“FHLB”) advances	$ 0	$ 405,000
Bank | FHLB - Floating
Debt Instrument [Line Items]
Federal Home Loan Bank (“FHLB”) advances	$ 249,331	$ 247,612
Minimum | Parent Company | Subordinated Debt
Debt Instrument [Line Items]
Variable interest rate	1.55%
Minimum | Bank | FHLB - Fixed
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	0.00%
Minimum | Bank | FHLB - Floating
Debt Instrument [Line Items]
Variable interest rate	0.53%
Maximum | Parent Company | Subordinated Debt
Debt Instrument [Line Items]
Variable interest rate	2.10%
Maximum | Bank | FHLB - Fixed
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.34%
Maximum | Bank | FHLB - Floating
Debt Instrument [Line Items]
Variable interest rate	0.59%

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances and Long-Term Debt (Junior Subordinated Debt) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)trust	Dec. 31, 2020USD ($)
Debt Instrument [Line Items]
Number of wholly owned subsidiaries that are statutory business trusts | trust	6
Junior subordinated debt
Debt Instrument [Line Items]
Number of statutory business trusts formed for the purpose of issuing junior subordinated debt to third party investors | trust	6
Aggregate Principal Amount of Trust Securities	$ 4,641	$ 4,641
Aggregate Principal Amount of the Junior Subordinated Debts	$ 148,000	148,000
East West Capital Trust V | Junior subordinated debt
Debt Instrument [Line Items]
Stated Interest Rate, basis spread (as a percent)	1.80%
Current Rate	1.96%
Aggregate Principal Amount of Trust Securities	$ 464	464
Aggregate Principal Amount of the Junior Subordinated Debts	$ 15,000	15,000
East West Capital Trust VI | Junior subordinated debt
Debt Instrument [Line Items]
Stated Interest Rate, basis spread (as a percent)	1.50%
Current Rate	1.70%
Aggregate Principal Amount of Trust Securities	$ 619	619
Aggregate Principal Amount of the Junior Subordinated Debts	$ 20,000	20,000
East West Capital Trust VII | Junior subordinated debt
Debt Instrument [Line Items]
Stated Interest Rate, basis spread (as a percent)	1.35%
Current Rate	1.55%
Aggregate Principal Amount of Trust Securities	$ 928	928
Aggregate Principal Amount of the Junior Subordinated Debts	$ 30,000	30,000
East West Capital Trust VIII | Junior subordinated debt
Debt Instrument [Line Items]
Stated Interest Rate, basis spread (as a percent)	1.40%
Current Rate	1.58%
Aggregate Principal Amount of Trust Securities	$ 619	619
Aggregate Principal Amount of the Junior Subordinated Debts	$ 18,000	18,000
East West Capital Trust IX | Junior subordinated debt
Debt Instrument [Line Items]
Stated Interest Rate, basis spread (as a percent)	1.90%
Current Rate	2.10%
Aggregate Principal Amount of Trust Securities	$ 928	928
Aggregate Principal Amount of the Junior Subordinated Debts	$ 30,000	30,000
MCBI Statutory Trust I | Junior subordinated debt
Debt Instrument [Line Items]
Stated Interest Rate, basis spread (as a percent)	1.55%
Current Rate	1.75%
Aggregate Principal Amount of Trust Securities	$ 1,083	1,083
Aggregate Principal Amount of the Junior Subordinated Debts	$ 35,000	$ 35,000

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Valuation allowance	$ 0	$ 0
(Reversal) charge of Interest and penalties related to income taxes	921	564	$ (6,300)
Total interest and penalties accrued	$ 921	$ 564

Income Taxes (Components of Inc

Income Taxes (Components of Income Tax Expense/Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax expense (benefit):
Federal	$ 84,249	$ 84,560	$ 107,393
State	95,939	74,252	86,578
Foreign	(1,554)	671	(2,485)
Total current income tax expense	178,634	159,483	191,486
Deferred income tax expense (benefit):
Federal	1,528	(28,093)	(8,801)
State	3,259	(11,671)	(16,390)
Foreign	(25)	(1,751)	3,587
Total deferred income tax expense (benefit)	4,762	(41,515)	(21,604)
Income tax expense	$ 183,396	$ 117,968	$ 169,882

Income Taxes (Reconciliation of

Income Taxes (Reconciliation of Federal Statutory Rate) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Difference between the effective tax rate implicit in the consolidated financial statements and the statutory federal income tax rate
Statutory U.S. federal tax rate	21.00%	21.00%	21.00%
U.S. state income taxes, net of U.S. federal income tax effect	7.40%	7.20%	7.10%
Tax credits and benefits, net of related expenses	(11.30%)	(12.40%)	(6.80%)
Other, net	0.30%	1.40%	(1.20%)
Effective tax rate	17.40%	17.20%	20.10%

Income Taxes (Deferred Tax Asse

Income Taxes (Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for loan losses	$ 166,398	$ 192,534
Investments in qualified affordable housing partnerships, tax credit and other investments, net	14,977	11,174
Deferred compensation	23,954	23,604
Interest income on nonaccrual loans	4,192	5,909
State taxes	5,237	273
Unrealized losses on securities	37,423	0
Tax credit carryforwards	8,692	0
Premises and equipment	1,434	2,096
Lease liabilities	31,324	30,554
Other	1,018	1,441
Total deferred tax assets	294,649	267,585
Deferred tax liabilities:
Equipment lease financing	26,607	29,990
Investments in qualified affordable housing partnerships, tax credit and other investments, net	12,187	14,912
Core deposit intangibles	1,119	1,934
FHLB stock dividends	1,886	1,855
Mortgage servicing assets	1,759	1,675
Acquired debts	1,536	1,597
Prepaid expenses	1,525	1,194
Premises and equipment	0	99
Unrealized gains on securities	0	21,593
Operating lease right-of-use assets	29,472	28,468
Other	428	453
Total deferred tax liabilities	76,519	103,770
Net deferred tax assets	$ 218,130	$ 163,815

Income Taxes (Unrecognized Tax

Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Activity related to unrecognized tax benefits
Beginning balance	$ 5,045	$ 0	$ 4,378
Additions for tax positions related to prior years	0	5,045	30,103
Deductions for tax positions related to prior years	0	0	(34,481)
Ending balance	$ 5,045	$ 5,045	$ 0

Commitments and Contingencies_2

Commitments and Contingencies (Credit-related Commitments) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments to Extend Credit
Expire in One Year or Less	$ 174,475
Expire After Five Years	3,943
Total	309,616
Loan commitments
Commitments to Extend Credit
Expire in One Year or Less	3,282,433
Expire After One Year Through Three Years	123,780
Expire After Three Years Through Five Years	2,740,508
Expire After Five Years	764,677
Total	6,911,398	$ 5,690,917
Commercial letters of credit and SBLCs
Commitments to Extend Credit
Expire in One Year or Less	1,116,404
Expire After One Year Through Three Years	346,303
Expire After Three Years Through Five Years	119,356
Expire After Five Years	639,636
Total	2,221,699	2,240,813
Commitments to Extend Credit
Commitments to Extend Credit
Expire in One Year or Less	4,398,837
Expire After One Year Through Three Years	470,083
Expire After Three Years Through Five Years	2,859,864
Expire After Five Years	1,404,313
Total	$ 9,133,097	$ 7,931,730

Commitments and Contingencies_3

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments to Extend Credit
Letters of credit	$ 2,220,000	$ 2,240,000
Allowance for Unfunded Credit Commitments	27,500	33,500
Other Commitments
Total	309,616
Accrued Expenses And Other Liabilities
Other Commitments
Total	309,600	182,700
Standby Letters of Credit
Commitments to Extend Credit
Letters of credit	2,140,000	2,120,000
Commercial Letters Of Credit
Commitments to Extend Credit
Letters of credit	78,900	124,900
Loans sold or securitized with recourse | Single Family Residential and Multi-Family Residential | Loans Sold or Securitized with Recourse
Commitments to Extend Credit
Allowance for Unfunded Credit Commitments	$ 29	$ 88

Commitments and Contingencies_4

Commitments and Contingencies (Guarantees Outstanding) (Details) - Loans sold or securitized with recourse - Loans Sold or Securitized with Recourse - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Guarantor Obligations, Maximum Potential Future Payments [Abstract]
Expire in One Year or Less	$ 33
Expire After One Year Through Three Years	329
Expire After Three Years Through Five Years	37
Expire After Five Years	22,523
Total	22,922	$ 26,198
Carrying Value	31,095	37,145
Single Family Residential with recourse
Guarantor Obligations, Maximum Potential Future Payments [Abstract]
Expire in One Year or Less	33
Expire After One Year Through Three Years	329
Expire After Three Years Through Five Years	37
Expire After Five Years	7,527
Total	7,926	10,526
Carrying Value	7,926	10,526
Multifamily residential
Guarantor Obligations, Maximum Potential Future Payments [Abstract]
Expire in One Year or Less	0
Expire After One Year Through Three Years	0
Expire After Three Years Through Five Years	0
Expire After Five Years	14,996
Total	14,996	15,672
Carrying Value	$ 23,169	$ 26,619

Stock Compensation Plans (Narra

Stock Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
RSUs | Ratably
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
RSUs | Cliff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of awards granted (in dollars per share)	$ 77.67	$ 39.79	$ 54.64
Total fair value of awards that vested	$ 15.4	$ 8.9	$ 14.5
Total unrecognized stock compensation expense	$ 13.6
Weighted average period to recognize unrecognized compensation cost	1 year 9 months 7 days
Performance-Based RSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award available for grant	0.00%
Performance-Based RSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award available for grant	200.00%
Performance-Based RSUs | Cliff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Time-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of awards granted (in dollars per share)	$ 71.88	$ 40.61	$ 52.46
Total fair value of awards that vested	$ 22.7	$ 11.5	$ 20.7
Total unrecognized stock compensation expense	$ 24.4
Weighted average period to recognize unrecognized compensation cost	1 year 9 months 29 days
2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	17.1
Shares available (in shares)	5.4

Stock Compensation Plans (Summa

Stock Compensation Plans (Summary of Total Share-Based Compensation Expense and Related Tax Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock compensation costs	$ 32,567	$ 29,237	$ 30,761
Excess tax benefits related to stock compensation expense recognized in income tax expense	$ 1,760	$ (1,839)	$ 4,792

Stock Compensation Plans (Sum_2

Stock Compensation Plans (Summary of Activity for Time-Based and Performance-Based RSUs) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Time-Based RSUs
Shares
Outstanding at beginning of year (in shares)	1,345,635
Granted (in shares)	417,900
Vested (in shares)	(301,800)
Forfeited (in shares)	(131,789)
Outstanding at end of year (in shares)	1,329,946	1,345,635
Weighted- Average Grant Date Fair Value
Outstanding at end of year (in dollars per share)	$ 50.22
Granted (in dollars per share)	71.88	$ 40.61	$ 52.46
Vested (in dollars per share)	66.85
Forfeited (in dollars per share)	56.26
Outstanding at end of year (in dollars per share)	$ 52.65	$ 50.22
Performance-Based RSUs
Shares
Outstanding at beginning of year (in shares)	398,057
Granted (in shares)	91,960
Vested (in shares)	(120,286)
Forfeited (in shares)	0
Outstanding at end of year (in shares)	369,731	398,057
Weighted- Average Grant Date Fair Value
Outstanding at end of year (in dollars per share)	$ 53.66
Granted (in dollars per share)	77.67	$ 39.79	$ 54.64
Vested (in dollars per share)	70.13
Forfeited (in dollars per share)	0
Outstanding at end of year (in dollars per share)	$ 54.28	$ 53.66
Time Based Restricted Stock Settled in Cash
Shares
Outstanding at beginning of year (in shares)	21,802
Granted (in shares)	24,073
Vested (in shares)	0
Forfeited (in shares)	(13,228)
Outstanding at end of year (in shares)	32,647	21,802

Stock Compensation Plans (Stock

Stock Compensation Plans (Stock Purchase Plan) (Details) - Stock Purchase Plan - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Stock purchase plan
Purchase price of shares in terms compared to market price per share (as a percent)	90.00%
Annual purchase limitation per employee (in dollars per employee)	$ 22,500
Compensation expense	$ 0
Common stock, shares authorized (in shares)	2,000,000
Shares sold to employees (in shares)	37,725	89,425
Value of shares sold to employees under purchase plan	$ 2,600,000	$ 2,300,000
Shares available (in shares)	266,775

Stockholders_ Equity and Earn_3

Stockholders’ Equity and Earnings Per Share (Earnings Per Share Calculations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic:
Net income available to common stockholders	$ 872,981	$ 567,797	$ 674,035
Basic weighted average common shares outstanding (in shares)	141,826	142,336	145,497
Basic EPS (in dollars per share)	$ 6.16	$ 3.99	$ 4.63
Diluted:
Net income available to common stockholders	$ 872,981	$ 567,797	$ 674,035
Basic weighted average common shares outstanding (in shares)	141,826	142,336	145,497
Diluted potential common shares (in shares)	1,314	655	682
Diluted weighted average common shares outstanding (in shares)	143,140	142,991	146,179
Diluted EPS (in dollars per share)	$ 6.10	$ 3.97	$ 4.61

Stockholders_ Equity and Earn_4

Stockholders’ Equity and Earnings Per Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 03, 2020
Stockholders' Equity and Earnings Per Share [Line Items]
Amount of stock repurchase authorized by the Board of Directors				$ 500
Repurchase of common stock pursuant to the Stock Repurchase Program (in shares)		4,471,682
Average price (in dollars per share)		$ 32.64
Repurchase of common stock pursuant to the Stock Repurchase Program		$ 146
RSUs
Stockholders' Equity and Earnings Per Share [Line Items]
Weighted average shares of anti-dilutive restricted stock units (in shares)	6,000	134,000	15,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Components of AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 5,269,175	$ 5,017,617	$ 4,423,974
Other comprehensive (loss) income	(134,706)	62,733	39,766
Ending balance	5,837,218	5,269,175	5,017,617
AFS Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	52,247	(2,419)	(45,821)
Net unrealized gains (losses) arising during the period	(136,846)	63,329	46,170
Amount reclassified from AOCI	(1,104)	(8,663)	(2,768)
Other comprehensive (loss) income	(137,950)	54,666	43,402
Ending balance	(85,703)	52,247	(2,419)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,230)	0	0
Net unrealized gains (losses) arising during the period	866	(1,149)	0
Amount reclassified from AOCI	621	(81)	0
Other comprehensive (loss) income	1,487	(1,230)	0
Ending balance	257	(1,230)	0
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(6,692)	(15,989)	(12,353)
Net unrealized gains (losses) arising during the period	1,757	9,297	(3,636)
Amount reclassified from AOCI	0	0	0
Other comprehensive (loss) income	1,757	9,297	(3,636)
Ending balance	(4,935)	(6,692)	(15,989)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	44,325	(18,408)	(58,174)
Net unrealized gains (losses) arising during the period	(134,223)	71,477	42,534
Amount reclassified from AOCI	(483)	(8,744)	(2,768)
Other comprehensive (loss) income	(134,706)	62,733	39,766
Ending balance	$ (90,381)	$ 44,325	$ (18,408)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Before - Tax
Other comprehensive (loss) income	$ (193,420)	$ 83,250	$ 61,909
Tax Effect
Other comprehensive (loss) income	58,714	(20,517)	(22,143)
Net-of- Tax
Other comprehensive (loss) income	(134,706)	62,733	39,766
AFS Debt Securities
Before - Tax
Net unrealized (losses) gains arising during the period	(194,393)	89,868	65,549
Net realized gains reclassified into net income	(1,568)	(12,299)	(3,930)
Other comprehensive (loss) income	(195,961)	77,569	61,619
Tax Effect
Net unrealized gains (losses) arising during the period	57,547	(26,539)	(19,379)
Net realized gains reclassified into net income	464	3,636	1,162
Other comprehensive (loss) income	58,011	(22,903)	(18,217)
Net-of- Tax
Net unrealized gains (losses) arising during the period	(136,846)	63,329	46,170
Net realized gains reclassified into net income	(1,104)	(8,663)	(2,768)
Other comprehensive (loss) income	(137,950)	54,666	43,402
Cash Flow Hedges
Before - Tax
Net unrealized (losses) gains arising during the period	1,210	(1,604)	0
Net realized gains reclassified into net income	868	(113)	0
Other comprehensive (loss) income	2,078	(1,717)	0
Tax Effect
Net unrealized gains (losses) arising during the period	(344)	455	0
Net realized gains reclassified into net income	(247)	32	0
Other comprehensive (loss) income	(591)	487	0
Net-of- Tax
Net unrealized gains (losses) arising during the period	866	(1,149)	0
Net realized gains reclassified into net income	621	(81)	0
Other comprehensive (loss) income	1,487	(1,230)	0
Foreign Currency Translation Adjustments
Before - Tax
Net unrealized (losses) gains arising during the period	463	7,398	290
Other comprehensive (loss) income	463	7,398	290
Tax Effect
Net unrealized gains (losses) arising during the period	1,294	1,899	(3,926)
Other comprehensive (loss) income	1,294	1,899	(3,926)
Net-of- Tax
Net unrealized gains (losses) arising during the period	1,757	9,297	(3,636)
Net realized gains reclassified into net income	0	0	0
Other comprehensive (loss) income	$ 1,757	$ 9,297	$ (3,636)

Regulatory Requirements and M_3

Regulatory Requirements and Matters (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Capital adequacy
Tier One Common Equity For Capital Adequacy To Risk Weighted Assets, Minimum	4.50%
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.060
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.080
Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum	0.040
Fully phased-in capital conservation buffer	2.50%
East West Bank
Capital adequacy
Tier One Common Equity For Capital Adequacy To Risk Weighted Assets, Minimum	4.50%
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.060
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.080
Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum	0.040
Daily average reserve requirement	$ 0	$ 0

Regulatory Requirements and M_4

Regulatory Requirements and Matters (Regulatory Capital Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Minimum Capital Ratios
Total capital ratio required for capital adequacy to risk weighted assets	0.080
Tier 1 risk based capital ratio required for capital adequacy to risk weighted assets	0.060
Common equity tier 1 capital adequacy to risk weighted assets	4.50%
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	0.040
Well Capitalized Requirement
Fully phased-in capital conservation buffer	2.50%
Company
Actual
Total capital (to risk-weighted assets), Amount	$ 6,124,827	$ 5,510,640
Tier I capital (to risk-weighted assets), Amount	5,559,357	4,882,555
Tier 1 Common Equity capital (to risk-weighted assets), Amount	5,559,357	4,882,555
Tier 1 leverage capital (to adjusted average assets), Amount	5,559,357	4,882,555
Risk-weighted assets	43,585,105	38,406,071
Adjusted quarterly average total assets	$ 62,387,003	$ 52,540,964
Total capital (to risk-weighted assets), Ratio (as a percent)	0.141	0.143
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.128	0.127
Tier 1 Common Equity capital (to risk-weighted assets), Ratio (as a percent)	0.128	0.127
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	0.090	0.094
Minimum Capital Ratios
Total capital ratio required for capital adequacy to risk weighted assets	0.080
Tier 1 risk based capital ratio required for capital adequacy to risk weighted assets	0.060
Common equity tier 1 capital adequacy to risk weighted assets	4.50%
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	0.040
Fully phased-in minimum capital ratios
Total capital (to risk-weighted assets), Ratio (as a percent)	10.50%
Tier I capital (to risk-weighted assets), Ratio (as a percent)	8.50%
Tier 1 Common Equity Capital (to risk-weighted assets), Ratio (as a percent)	7.00%
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	4.00%
Well Capitalized Requirement
Total capital (to risk-weighted assets), Ratio (as a percent)	0.100
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.060
Tier 1 Common Equity capital (to risk-weighted assets), Ratio (as a percent)	6.50%
East West Bank
Actual
Total capital (to risk-weighted assets), Amount	$ 5,766,734	$ 5,143,246
Tier I capital (to risk-weighted assets), Amount	5,349,264	4,662,426
Tier 1 Common Equity capital (to risk-weighted assets), Amount	5,349,264	4,662,426
Tier 1 leverage capital (to adjusted average assets), Amount	5,349,264	4,662,426
Risk-weighted assets	43,572,086	38,481,275
Adjusted quarterly average total assets	$ 62,366,514	$ 52,594,313
Total capital (to risk-weighted assets), Ratio (as a percent)	0.132	0.134
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.123	0.121
Tier 1 Common Equity capital (to risk-weighted assets), Ratio (as a percent)	0.123	0.121
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	0.086	0.090
Minimum Capital Ratios
Total capital ratio required for capital adequacy to risk weighted assets	0.080
Tier 1 risk based capital ratio required for capital adequacy to risk weighted assets	0.060
Common equity tier 1 capital adequacy to risk weighted assets	4.50%
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	0.040
Fully phased-in minimum capital ratios
Total capital (to risk-weighted assets), Ratio (as a percent)	10.50%
Tier I capital (to risk-weighted assets), Ratio (as a percent)	8.50%
Tier 1 Common Equity Capital (to risk-weighted assets), Ratio (as a percent)	7.00%
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	4.00%
Well Capitalized Requirement
Total capital (to risk-weighted assets), Ratio (as a percent)	0.100
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.080
Tier 1 Common Equity capital (to risk-weighted assets), Ratio (as a percent)	6.50%
Tier 1 leverage capital (to adjusted average assets), Ratio (as a percent)	0.050

Business Segments (Narrative) (

Business Segments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2021segment
Segment Reporting [Abstract]
Number of reportable segments	3

Business Segments (Operating Re

Business Segments (Operating Results and Other Key Financial Measures) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information
Net interest income before (reversal of) provision for credit losses	$ 1,531,571	$ 1,377,193	$ 1,467,813
(Reversal of) provision for credit losses	(35,000)	210,653	98,685
Noninterest income	285,895	235,547	222,245
Noninterest expense	796,089	716,322	747,456
INCOME BEFORE INCOME TAXES	1,056,377	685,765	843,917
Segment net income (1)	872,981	567,797	674,035
Segment assets	60,870,701	52,156,913	44,196,096
Consumer and Business Banking
Segment Reporting Information
Net interest income before (reversal of) provision for credit losses	697,101	530,829	696,551
(Reversal of) provision for credit losses	(4,998)	3,885	14,178
Noninterest income	94,125	64,115	57,238
Noninterest expense	364,635	331,750	343,001
INCOME BEFORE INCOME TAXES	431,589	259,309	396,610
Segment net income (1)	308,630	185,782	283,674
Segment assets	14,961,809	13,351,060	11,520,586
Commercial Banking
Segment Reporting Information
Net interest income before (reversal of) provision for credit losses	766,202	706,286	651,413
(Reversal of) provision for credit losses	(30,002)	206,768	84,507
Noninterest income	163,768	142,337	135,305
Noninterest expense	271,408	266,923	263,064
INCOME BEFORE INCOME TAXES	688,564	374,932	439,147
Segment net income (1)	492,271	268,476	314,321
Segment assets	28,556,706	26,958,766	25,501,534
Other
Segment Reporting Information
Net interest income before (reversal of) provision for credit losses	68,268	140,078	119,849
(Reversal of) provision for credit losses	0	0	0
Noninterest income	28,002	29,095	29,702
Noninterest expense	160,046	117,649	141,391
INCOME BEFORE INCOME TAXES	(63,776)	51,524	8,160
Segment net income (1)	72,080	113,539	76,040
Segment assets	$ 17,352,186	$ 11,847,087	$ 7,173,976

Parent Company Condensed Fina_3

Parent Company Condensed Financial Statements (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
East West Bank
Condensed Financial Statements, Captions [Line Items]
Dividends declared	$ 200	$ 511	$ 190

Parent Company Condensed Fina_4

Parent Company Condensed Financial Statements (Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents due from subsidiary bank	$ 3,912,935	$ 4,017,971
Other assets	1,382,253	1,324,262
TOTAL	60,870,701	52,156,913	$ 44,196,096
LIABILITIES
Total liabilities	55,033,483	46,887,738
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 167,790,645 and 167,240,600 shares issued in 2021 and 2020, respectively	168	167
Additional paid-in capital	1,893,557	1,858,352
Retained earnings	4,683,659	4,000,414
Treasury stock, at cost 25,882,691 shares in 2021 and 25,675,371 shares in 2020	(649,785)	(634,083)
AOCI, net of tax	(90,381)	44,325
Total stockholders’ equity	5,837,218	5,269,175	$ 5,017,617	$ 4,423,974
TOTAL	60,870,701	52,156,913
Parent Company
ASSETS
Cash and cash equivalents due from subsidiary bank	345,018	439,065
Investments in tax credit and other investments, net	4,082	6,586
Other assets	9,407	3,072
TOTAL	5,994,618	5,504,357
LIABILITIES
Long-term debt	147,658	147,376
Accrued income tax payable	0	81,741
Other liabilities	9,742	6,065
Total liabilities	157,400	235,182
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 167,790,645 and 167,240,600 shares issued in 2021 and 2020, respectively	168	167
Additional paid-in capital	1,893,557	1,858,352
Retained earnings	4,683,659	4,000,414
Treasury stock, at cost 25,882,691 shares in 2021 and 25,675,371 shares in 2020	(649,785)	(634,083)
AOCI, net of tax	(90,381)	44,325
Total stockholders’ equity	5,837,218	5,269,175
TOTAL	5,994,618	5,504,357
Parent Company | Bank
ASSETS
Investments in Subsidiaries	5,626,975	5,048,896
Parent Company | Nonbank
ASSETS
Investments in Subsidiaries	$ 9,136	$ 6,738

Parent Company Condensed Fina_5

Parent Company Condensed Financial Statements (Condensed Balance Sheet - Additional Information) (Details) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Balance sheets
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	167,790,645	167,240,600
Treasury stock, shares (in shares)	25,882,691	25,675,371

Parent Company Condensed Fina_6

Parent Company Condensed Financial Statements (Condensed Statement of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of income
Interest expense on long-term debt	$ 87,163	$ 217,849	$ 414,487
Compensation and employee benefits	433,728	404,071	401,700
Amortization of tax credit and other investments	122,457	70,082	98,383
Other expense	81,798	79,489	92,249
Income tax benefit	(183,396)	(117,968)	(169,882)
NET INCOME	872,981	567,797	674,035
Parent Company
Statement of income
Other income	11	3	425
Total income	200,093	511,112	190,614
Interest expense on long-term debt	2,974	3,877	6,482
Compensation and employee benefits	6,370	6,210	5,479
Amortization of tax credit and other investments	425	1,248	8,437
Other expense	1,306	1,184	1,487
Total expense	11,075	12,519	21,885
Income before income tax benefit and equity in undistributed income of subsidiaries	189,018	498,593	168,729
Income tax benefit	3,005	4,158	6,737
Undistributed earnings of subsidiaries, primarily bank	680,958	65,046	498,569
NET INCOME	872,981	567,797	674,035
Parent Company | Bank
Statement of income
Dividends from subsidiaries	200,000	511,000	190,000
Parent Company | Nonbank
Statement of income
Dividends from subsidiaries	$ 82	$ 109	$ 189

Parent Company Condensed Fina_7

Parent Company Condensed Financial Statements (Condensed Statement of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of cash flows
Net income	$ 872,981	$ 567,797	$ 674,035
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense (benefit)	4,762	(41,515)	(21,604)
Net change in other assets	124,496	(340,566)	(172,506)
Net change in other liabilities	(29,412)	170,420	6,015
Net cash provided by operating activities	1,168,422	692,644	733,145
CASH FLOWS FROM INVESTING ACTIVITIES
Net increase in investments in tax credit investments	(189,836)	(154,887)	(146,902)
Distributions received from equity method investees	14,440	15,901	9,502
Other investing activities	(925)	6,858	2,560
Net cash (used in) provided by investing activities	(9,117,204)	(6,873,736)	(2,592,926)
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements	2,573	2,326	3,383
Stocks tendered for payment of withholding taxes	(15,702)	(8,253)	(14,635)
Repurchase of common stocks pursuant to the Stock Repurchase Program	0	(145,966)	0
Cash dividends paid	(188,762)	(158,222)	(155,107)
Net cash provided by financing activities	7,835,045	6,908,908	2,125,938
Net (decrease) increase in cash and cash equivalents	(105,036)	756,822	259,772
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4,017,971	3,261,149	3,001,377
CASH AND CASH EQUIVALENTS, END OF YEAR	3,912,935	4,017,971	3,261,149
Parent Company
Statement of cash flows
Net income	872,981	567,797	674,035
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed earnings of subsidiaries, principally bank	(680,958)	(65,046)	(498,569)
Amortization expense	1,877	1,523	8,703
Deferred income tax expense (benefit)	2,721	491	(10,132)
Net change in other assets	(5,685)	40	10,246
Net change in other liabilities	(81,706)	77,052	(18)
Net cash provided by operating activities	109,230	581,857	184,265
CASH FLOWS FROM INVESTING ACTIVITIES
Net increase in investments in tax credit investments	(346)	(172)	(292)
Distributions received from equity method investees	436	4,096	2,577
Net increase in investments in and advances to nonbank subsidiaries	(1,476)	(2,732)	(3,314)
Other investing activities	0	0	(157)
Net cash (used in) provided by investing activities	(1,386)	1,192	(1,186)
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements	2,573	2,326	3,383
Stocks tendered for payment of withholding taxes	(15,702)	(8,253)	(14,635)
Repurchase of common stocks pursuant to the Stock Repurchase Program	0	(145,966)	0
Cash dividends paid	(188,762)	(158,222)	(155,107)
Net cash provided by financing activities	(201,891)	(310,115)	(166,359)
Net (decrease) increase in cash and cash equivalents	(94,047)	272,934	16,720
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	439,065	166,131	149,411
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 345,018	$ 439,065	$ 166,131

Subsequent Events (Details)

Subsequent Events (Details)	Feb. 22, 2022$ / shares
Subsequent Event
Subsequent events
Dividends paid per common share (in dollars per share)	$ 0.40