Customers Bancorp (CUBI) 10-Q10 May 212021 Q1 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2021	Apr. 30, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2021
Entity File Number	001-35542
Entity Registrant Name	Customers Bancorp, Inc.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	27-2290659
Entity Address, Address Line One	701 Reading Avenue
Entity Address, City or Town	West Reading
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19611
City Area Code	610
Local Phone Number	933-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		32,266,264
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001488813
Current Fiscal Year End Date	--12-31
Voting Common Stock, par value $1.00 per share \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Voting Common Stock, par value $1.00 per share
Trading Symbol	CUBI
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series C, par value $1.00 per share
Trading Symbol	CUBI/PC
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series D, par value $1.00 per share
Trading Symbol	CUBI/PD
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series E, par value $1.00 per share
Trading Symbol	CUBI/PE
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series F, par value $1.00 per share
Trading Symbol	CUBI/PF
Security Exchange Name	NYSE
5.375% Subordinated Notes due 2034 \| New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	5.375% Subordinated Notes due 2034
Trading Symbol	CUBB
Security Exchange Name	NYSE

Consolidated Balance Sheet - Un

Consolidated Balance Sheet - Unaudited - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 3,123	$ 78,090
Interest earning deposits	512,241	615,264
Cash and cash equivalents	515,364	693,354
Investment securities, at fair value	1,441,904	1,210,285
Loans held for sale (includes $1,205 and $5,509, respectively, at fair value)	46,106	79,086
Loans receivable, mortgage warehouse, at fair value	3,407,622	3,616,432
Loans receivable, PPP	5,178,089	4,561,365
Loans and leases receivable	7,536,489	7,575,368
Allowance for credit losses on loans and leases	(128,736)	(144,176)
Total loans and leases receivable, net of allowance for credit losses on loans and leases	15,993,464	15,608,989
FHLB, Federal Reserve Bank, and other restricted stock	69,420	71,368
Accrued interest receivable	83,186	80,412
Bank premises and equipment, net	10,943	11,225
Bank-owned life insurance	281,923	280,067
Goodwill and other intangibles	3,911	3,969
Other assets	371,439	338,438
Assets of discontinued operations	0	62,055
Total assets	18,817,660	18,439,248
Deposits:
Demand, non-interest bearing	2,687,628	2,356,998
Interest bearing	9,784,812	8,952,931
Total deposits	12,472,440	11,309,929
Federal funds purchased	365,000	250,000
FHLB advances	850,000	850,000
Other borrowings	124,138	124,037
Subordinated debt	181,464	181,394
FRB PPP liquidity facility	3,284,156	4,415,016
Accrued interest payable and other liabilities	351,741	152,082
Liabilities of discontinued operations	0	39,704
Total liabilities	17,628,939	17,322,162
Commitments and contingencies (NOTE 14)
Shareholders’ equity:
Preferred stock, par value $1.00 per share; liquidation preference $25.00 per share; 100,000,000 shares authorized, 9,000,000 shares issued and outstanding as of March 31, 2021 and December 31, 2020	217,471	217,471
Common stock, par value $1.00 per share; 200,000,000 shares authorized; 33,519,381 and 32,985,707 shares issued as of March 31, 2021 and December 31, 2020; 32,238,762 and 31,705,088 shares outstanding as of March 31, 2021 and December 31, 2020	33,519	32,986
Additional paid in capital	515,318	455,592
Retained earnings	438,802	438,581
Accumulated other comprehensive income (loss), net	5,391	(5,764)
Treasury stock, at cost (1,280,619 shares as of March 31, 2021 and December 31, 2020)	(21,780)	(21,780)
Total shareholders’ equity	1,188,721	1,117,086
Total liabilities and shareholders’ equity	$ 18,817,660	$ 18,439,248

Consolidated Balance Sheet - _2

Consolidated Balance Sheet - Unaudited (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Loans held for sale at fair value	$ 1,205	$ 5,509
Preferred stock, par value (usd per share)	$ 1	$ 1
Preferred stock, liquidation preference (usd per share)	$ 25	$ 25
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, shares issued (shares)	9,000,000	9,000,000
Preferred stock, shares outstanding (shares)	9,000,000	9,000,000
Common stock, par value (usd per share)	$ 1	$ 1
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock, shares issued (shares)	33,519,381	32,985,707
Common stock, shares outstanding (shares)	32,238,762	31,705,088
Treasury stock, shares (shares)	1,280,619	1,280,619

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income:
Loans and leases	$ 152,117	$ 116,080
Investment securities	7,979	4,977
Other	1,019	4,286
Total interest income	161,115	125,343
Interest expense:
Deposits	15,658	34,353
FHLB advances	5,192	5,390
Subordinated debt	2,689	2,689
FRB PPP liquidity facility, federal funds purchased and other borrowings	4,845	1,590
Total interest expense	28,384	44,022
Net interest income	132,731	81,321
Provision (benefit) for credit losses on loans and leases	(2,919)	31,786
Net interest income after provision (benefit) for credit losses on loans and leases	135,650	49,535
Non-interest income:
Commercial lease income	5,205	4,268
Bank-owned life insurance	1,679	1,762
Mortgage warehouse transactional fees	4,247	1,952
Gain (loss) on sale of SBA and other loans	1,575	11
Mortgage banking income	463	296
Gain (loss) on sale of investment securities	23,566	3,974
Unrealized gain (loss) on investment securities	974	(1,378)
Unrealized gain (loss) on derivatives	2,537	(1,146)
Loss on cash flow hedge derivative terminations	(24,467)	0
Other	1,741	600
Total non-interest income	18,468	11,160
Non-interest expense:
Salaries and employee benefits	23,971	20,523
Technology, communication and bank operations	19,988	10,539
Professional services	6,289	3,544
Occupancy	2,621	2,613
Commercial lease depreciation	4,291	3,427
FDIC assessments, non-income taxes and regulatory fees	2,719	2,867
Merger and acquisition related expenses	418	0
Loan workout	(261)	366
Advertising and promotion	561	1,424
Other	1,330	3,664
Total non-interest expense	61,927	48,967
Income before income tax expense	92,191	11,728
Income tax expense	17,560	3,274
Net income from continuing operations	74,631	8,454
Loss from discontinued operations before income taxes	(20,354)	(6,722)
Income tax expense (benefit) from discontinued operations	17,682	(1,368)
Net loss from discontinued operations	(38,036)	(5,354)
Net income	36,595	3,100
Preferred stock dividends	3,391	3,615
Net income (loss) available to common shareholders	$ 33,204	$ (515)
Basic earnings (loss) per common share from continuing operations (usd per share)	$ 2.23	$ 0.15
Basic earnings (loss) per common share (usd per share)	1.04	(0.02)
Diluted earnings (loss) per common share from continuing operations (usd per share)	2.17	0.15
Diluted earnings (loss) per common share (usd per share)	$ 1.01	$ (0.02)
Interchange and card revenue
Non-interest income:
Non-interest income	$ 85	$ 270
Deposit fees
Non-interest income:
Non-interest income	$ 863	$ 551

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 36,595	$ 3,100
Unrealized gains (losses) on available for sale debt securities:
Unrealized gains (losses) arising during the period	400	(9,098)
Income tax effect	(104)	2,366
Reclassification adjustments for (gains) losses included in net income	(23,566)	(3,974)
Income tax effect	6,127	1,033
Net unrealized gains (losses) on available for sale debt securities	(17,143)	(9,673)
Unrealized gains (losses) on cash flow hedges:
Unrealized gains (losses) arising during the period	12,315	(27,697)
Income tax effect	(3,202)	7,351
Reclassification adjustment for (gains) losses included in net income	25,926	1,478
Income tax effect	(6,741)	(384)
Net unrealized gains (losses) on cash flow hedges	28,298	(19,252)
Other comprehensive income (loss), net of income tax effect	11,155	(28,925)
Comprehensive income (loss)	$ 47,750	$ (25,825)

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - Unaudited - USD ($) $ in Thousands		Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Additional Paid in Capital	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance, preferred stock (shares) at Dec. 31, 2019				9,000,000
Beginning balance, common stock (shares) at Dec. 31, 2019					31,336,791
Beginning balance at Dec. 31, 2019		$ 1,052,795	$ (61,475)	$ 217,471	$ 32,617	$ 444,218	$ 381,519	$ (61,475)	$ (1,250)	$ (21,780)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		3,100					3,100
Other comprehensive income (loss)		(28,925)							(28,925)
Preferred stock dividends	[1]	(3,615)					(3,615)
Share-based compensation expense		3,228				3,228
Issuance of common stock under share-based compensation arrangements (shares)					133,235
Issuance of common stock under share-based compensation arrangements		(472)			$ 134	(606)
Ending balance, preferred stock (shares) at Mar. 31, 2020				9,000,000
Ending balance, common stock (shares) at Mar. 31, 2020					31,470,026
Ending balance at Mar. 31, 2020		$ 964,636		$ 217,471	$ 32,751	446,840	319,529		(30,175)	(21,780)
Beginning balance, preferred stock (shares) at Dec. 31, 2020		9,000,000		9,000,000
Beginning balance, common stock (shares) at Dec. 31, 2020		31,705,088			31,705,088
Beginning balance at Dec. 31, 2020		$ 1,117,086		$ 217,471	$ 32,986	455,592	438,581		(5,764)	(21,780)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		36,595					36,595
Other comprehensive income (loss)		11,155							11,155
Preferred stock dividends	[1]	(3,391)					(3,391)
Sale of non-controlling interest in BMT	[2]	31,893				31,893
Distribution of investment in BM Technologies	[3]	(32,983)					(32,983)
Restricted stock awards to certain BMT team members	[4]	19,592				19,592
Share-based compensation expense		3,609				3,609
Issuance of common stock under share-based compensation arrangements (shares)					533,674
Issuance of common stock under share-based compensation arrangements		$ 5,165			$ 533	4,632
Ending balance, preferred stock (shares) at Mar. 31, 2021		9,000,000		9,000,000
Ending balance, common stock (shares) at Mar. 31, 2021		32,238,762			32,238,762
Ending balance at Mar. 31, 2021		$ 1,188,721		$ 217,471	$ 33,519	$ 515,318	$ 438,802		$ 5,391	$ (21,780)

[1]	Dividends per share of $0.34478125, $0.40625, $0.403125, and $0.375 per share were declared on Series C, D, E, and F preferred stock for the three months ended March 31, 2021. Dividends per share of $0.4375, $0.40625, $0.403125, and $0.375 per share were declared on Series C, D, E, and F preferred stock for the three months ended March 31, 2020.
[2]	Refer to NOTE 3 – DISCONTINUED OPERATIONS for additional information about the sale of non-controlling interest in BMT including the reverse recapitalization of MFAC.
[3]	Immediately after the closing of the BMT divestiture, Customers distributed all of its remaining investment in BM Technologies' common stock to its shareholders as special dividends, equivalent to 0.15389 of BM Technologies common stock for each share of Customers common stock. Refer to NOTE 3 – DISCONTINUED OPERATIONS.
[4]	At the closing of the BMT divestiture, certain team members of BMT received restricted stock awards in BM Technologies' common stock. Refer to NOTE 3 – DISCONTINUED OPERATIONS.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities
Net income from continuing operations	$ 74,631	$ 8,454
Adjustments to reconcile net income to net cash provided by (used in) continuing operating activities:
Provision (benefit) for credit losses on loans and leases	(2,919)	31,786
Depreciation and amortization	5,321	7,038
Share-based compensation expense	3,082	3,463
Deferred taxes	(6,198)	(22,287)
Net amortization (accretion) of investment securities premiums and discounts	(14)	251
Unrealized (gain) loss on investment securities	(974)	1,378
(Gain) loss on sale of investment securities	(23,566)	(3,974)
Unrealized gain (loss) on derivatives	(2,537)	1,146
Loss on cash flow hedge derivative terminations	24,467	0
Settlement of terminated cash flow hedge derivatives	(27,156)	0
Fair value adjustment on loans held for sale	(1,115)	0
(Gain) loss on sale of SBA and other loans	(2,071)	(170)
Origination of loans held for sale	(12,323)	(7,046)
Proceeds from the sale of loans held for sale	17,122	7,948
Amortization (accretion) of fair value discounts and premiums	(345)	(378)
Earnings on investment in bank-owned life insurance	(1,679)	(1,762)
(Increase) decrease in accrued interest receivable and other assets	20,979	(98,985)
Increase (decrease) in accrued interest payable and other liabilities	135,679	38,206
Net Cash Provided By (Used In) Continuing Operating Activities	200,384	(34,932)
Cash Flows from Investing Activities
Proceeds from maturities, calls and principal repayments of investment securities	62,348	24,079
Proceeds from sales of investment securities available for sale	353,915	0
Purchases of investment securities available for sale	(589,874)	(158,782)
Origination of mortgage warehouse loans	(16,998,093)	(9,791,820)
Proceeds from repayments of mortgage warehouse loans	17,211,909	9,520,758
Net (increase) decrease in loans and leases, excluding mortgage warehouse loans	(486,158)	174,971
Proceeds from sales of loans and leases	39,534	0
Purchase of loans	(117,036)	(193,363)
Net proceeds from sale of (purchases of) FHLB, Federal Reserve Bank, and other restricted stock	1,948
Net proceeds from sale of (purchases of) FHLB, Federal Reserve Bank, and other restricted stock		(2,926)
Purchases of bank premises and equipment	(298)	(89)
Purchases of leased assets under lessor operating leases	(4,849)	(6,384)
Net Cash Used In Continuing Investing Activities	(526,654)	(433,556)
Cash Flows from Financing Activities
Net increase (decrease) in deposits	1,162,511	(235,293)
Net increase (decrease) in short-term borrowed funds from the FRB	0	175,000
Net increase (decrease) in short-term borrowed funds from the FHLB	0	410,000
Net increase (decrease) in federal funds purchased	115,000	167,000
Net increase (decrease) in borrowed funds from FRB PPP liquidity facility	(1,130,860)	0
Preferred stock dividends paid	(3,401)	(3,615)
Payments of employee taxes withheld from share-based awards	(1,988)	(932)
Proceeds from issuance of common stock	6,684	225
Proceeds from sale of non-controlling interest in BMT	23,125	0
Net Cash Provided By Continuing Financing Activities	171,071	512,385
Net Increase (Decrease) in Cash and Cash Equivalents From Continuing Operations	(155,199)	43,897
Discontinued Operations:
Net Cash Used In Operating Activities	(22,791)	(232)
Net Cash Provided By Investing Activities	0	62
Net Increase (Decrease) in Cash and Cash Equivalents From Discontinued Operations	(22,791)	(170)
Net Increase (Decrease) in Cash and Cash Equivalents	(177,990)	43,727
Cash and Cash Equivalents – Beginning	693,354	212,505
Cash and Cash Equivalents – Ending	515,364	256,232
Non-cash Operating and Investing Activities:
Transfer of loans to other real estate owned	0	31
Distribution of investment in BM Technologies common stock	32,983	0
Transfer of loans held for investment to held for sale	44,258	0
Unsettled sales of investment securities	0	104,469
Unsettled purchases of investment securities	$ 56,620	$ 97,247

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity - Unaudited (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Special dividend (shares)	0.15389
Series C Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.34478125	$ 0.4375
Series D Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.40625	0.40625
Series E Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.403125	0.403125
Series F Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.375	$ 0.375

Description of the Business

Description of the Business	3 Months Ended
Description of the Business	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	DESCRIPTION OF THE BUSINESS Customers Bancorp, Inc. (“Customers Bancorp”) is a bank holding company engaged in banking activities through its wholly owned subsidiary, Customers Bank ("the Bank”), collectively referred to as “Customers” herein. Customers Bancorp and its wholly owned subsidiaries, the Bank, and non-bank subsidiaries, serve residents and businesses in Southeastern Pennsylvania (Bucks, Berks, Chester, Philadelphia and Delaware Counties); Rye Brook, New York (Westchester County); Hamilton, New Jersey (Mercer County); Boston, Massachusetts; Providence, Rhode Island; Portsmouth, New Hampshire (Rockingham County); Manhattan and Melville, New York; Washington, D.C.; Chicago, Illinois; and nationally for certain loan and deposit products. The Bank has 12 full-service branches and provides commercial banking products, primarily loans and deposits. In addition, Customers Bank also administratively supports loan and other financial products, including equipment finance leases, to customers through its limited-purpose offices in Boston, Massachusetts; Providence, Rhode Island; Portsmouth, New Hampshire; Manhattan and Melville, New York; Philadelphia and Lancaster, Pennsylvania; Chicago, Illinois, Dallas, Texas and Orlando, Florida. The Bank also serves specialty niche businesses nationwide, including its commercial loans to mortgage banking businesses, commercial equipment financing, SBA lending, specialty lending and consumer loans through relationships with fintech companies. The Bank is subject to regulation of the Pennsylvania Department of Banking and Securities and the Federal Reserve Bank and is periodically examined by those regulatory authorities. Customers Bancorp has made certain equity investments through its wholly owned subsidiaries CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd.

Significant Accounting Policies

Significant Accounting Policies and Basis of Presentation	3 Months Ended
Significant Accounting Policies and Basis of Presentation	Mar. 31, 2021
Accounting Policies [Abstract]
Significant Accounting Policies and Basis of Presentation	SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION Basis of Presentation The interim unaudited consolidated financial statements have been prepared in conformity with U.S. GAAP and pursuant to the rules and regulations of the SEC. These interim unaudited consolidated financial statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present a fair statement of the financial position and the results of operations and cash flows of Customers Bancorp and subsidiaries for the interim periods presented. Certain information and footnote disclosures normally included in the annual consolidated financial statements have been omitted from these interim unaudited consolidated financial statements as permitted by SEC rules and regulations. The December 31, 2020 consolidated balance sheet presented in this report has been derived from Customers Bancorp’s audited 2020 consolidated financial statements. Management believes that the disclosures are adequate to present fairly the consolidated financial statements as of the dates and for the periods presented. These interim unaudited consolidated financial statements should be read in conjunction with the 2020 consolidated financial statements of Customers Bancorp and subsidiaries included in Customers' Annual Report on Form 10-K for the year ended December 31, 2020 filed with the SEC on March 1, 2021 (the "2020 Form 10-K"). The 2020 Form 10-K describes Customers Bancorp’s significant accounting policies, which include its policies on Principles of Consolidation; Cash and Cash Equivalents and Statements of Cash Flows; Restrictions on Cash and Amounts due from Banks; Business Combinations; Investment Securities; Loan Accounting Framework; Loans Held for Sale and Loans at Fair Value; Loans Receivable - Mortgage Warehouse, at Fair Value; Loans Receivable, PPP; Loans and Leases Receivable; PCD Loans and Leases; ACL; Goodwill and Other Intangible Assets; FHLB, Federal Reserve Bank, and Other Restricted Stock; OREO; BOLI; Bank Premises and Equipment; Lessor and Lessee Operating Leases; Treasury Stock; Income Taxes; Share-Based Compensation; Transfer of Financial Assets; Derivative Instruments and Hedging; Comprehensive Income (Loss); EPS; and Loss Contingencies. There have been no material changes to Customers Bancorp's significant accounting policies noted above for the three months ended March 31, 2021. On January 4, 2021, Customers Bancorp completed the previously announced divestiture of BankMobile Technologies, Inc., the technology arm of its BankMobile segment, to MFAC Merger Sub Inc., an indirect wholly-owned subsidiary of MFAC, pursuant to an Agreement and Plan of Merger, dated August 6, 2020, by and among MFAC, MFAC Merger Sub Inc., BMT, Customers Bank, the sole stockholder of BMT, and Customers Bancorp, the parent bank holding company of Customers Bank (as amended on November 2, 2020 and December 8, 2020). Following the completion of the divestiture of BMT, BankMobile's serviced deposits and loans and the related net interest income have been combined with Customers’ financial condition and the results of operations as a single reportable segment. BMT's historical financial results for periods prior to the divestiture are reflected in Customers’ consolidated financial statements as discontinued operations. The assets and liabilities of BMT have been presented as "Assets of discontinued operations" and "Liabilities of discontinued operations" on the consolidated balance sheet at December 31, 2020. BMT's operating results and associated cash flows have been presented as "Discontinued operations" within the accompanying consolidated financial statements and prior period amounts have been reclassified to conform with the current period presentation. See NOTE 3 – DISCONTINUED OPERATIONS for additional information. Accounting and Reporting Considerations related to COVID-19 On March 27, 2020, the CARES Act was signed into law and contained substantial tax and spending provisions intended to address the impact of the COVID-19 pandemic and stimulate the economy. The CARES Act includes the SBA's PPP designed to aid small-and medium-sized businesses through federally guaranteed loans distributed through banks. Customers is a participant in the PPP. Section 4013 of the CARES Act also gives entities temporary relief from the accounting and disclosure requirements for TDRs under ASC 310-40 in certain situations. On December 27, 2020, the CAA was signed into law, which extended and expanded various relief provisions of the CARES Act. Accounting for PPP Loans In April 2020, Customers began originating loans to qualified small businesses under the PPP administered by the SBA. The PPP loans are fully guaranteed by the SBA and may be eligible for forgiveness by the SBA to the extent the proceeds are used for payroll and other permitted purposes in accordance with the requirements of the PPP. These loans carry a fixed rate of 1.00% and terms of two or five years, if not forgiven, in whole or in part. Payments are deferred for the first six months of the loan. The loans are 100% guaranteed by the SBA. The SBA pays the originating bank a processing fee ranging from 1% to 5% based on the size of the loan. On December 27, 2020, the CAA was signed into law, including Division N, Title III, the Economic Aid to Hard-Hit Small Businesses, Nonprofits, and Venues Act, which provides $284 billion in additional funding for the SBA's PPP for small businesses affected by the COVID-19 pandemic. On March 11, 2021, the American Rescue Plan Act of 2021 was enacted expanding eligibility for first and second round of PPP loans and revising the exclusions from payroll costs for purposes of loan forgiveness. The second round of PPP loans have the same general loan terms as the first round, and a processing fee of up to $2,500 per loan of less than $50,000, and 1% to 3% for loans greater than $50,000. Customers classified the PPP loans as held for investment and these loans are carried at amortized cost and interest income is recognized using the interest method. The origination fees, net of direct origination costs, are deferred and recognized as an adjustment to the yield of the related loans over their contractual life using the interest method. As PPP is newly created, Customers does not have historical prepayment data to accurately estimate principal prepayments and therefore has elected to not estimate prepayments as a policy election. No ACL has been recognized for PPP loans as these loans are 100% guaranteed by the SBA. See NOTE 8 – LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES for additional information. Loan Modifications As mentioned above, Section 4013 of the CARES Act, as amended by the CAA, gives entities temporary relief from the accounting and disclosure requirements for TDRs. In addition, on April 7, 2020, certain regulatory banking agencies issued an interagency statement that offers practical expedients for evaluating whether loan modifications in response to the COVID-19 pandemic are TDRs. To qualify for TDR accounting and disclosure relief under the CARES Act, as amended by the CAA, the applicable loan must not have been more than 30 days past due as of December 31, 2019, and the modification must be executed during the period beginning on March 1, 2020, and ending on the earlier of January 1, 2022, or the date that is 60 days after the termination date of the national emergency declared by the president on March 13, 2020, under the National Emergencies Act related to the outbreak of COVID-19. The CARES Act applies to modifications made as a result of COVID-19 including: forbearance agreements, interest rate modifications, repayment plans, and other arrangements to defer or delay payment of principal or interest. The interagency statement does not require the modification to be completed within a certain time period if it is related to COVID-19 and can be provided to borrowers either individually or as part of a loan modification program. Moreover, the interagency statement applies to short-term modifications (e.g. not more than six months deferral) including payment deferrals, fee waivers, extensions of repayment terms, or other insignificant payment delays as a result of COVID-19. Customers applied Section 4013 of the CARES Act and the interagency statement in connection with applicable modifications. For modifications that qualify under either the CARES Act or the interagency statement, TDR accounting and reporting is suspended. These modifications generally involve principal and/or interest payment deferrals for a period of 90 days at a time and can be extended to six months or longer for modifications that qualified under the Section 4013 of the CARES Act if requested by the borrower as long as the reason is still related to COVID-19. These modified loans would not also be reported as past due or nonaccrual during the deferral period. See NOTE 8 – LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES for additional information. Recently Issued Accounting Standards Presented below are recently issued accounting standards that Customers has adopted. Standard Summary of Guidance Effects on Financial Statements ASU 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting Issued March 2020 • Provides optional guidance for a limited period of time to ease the potential burden in accounting for (or derecognizing the effects of) reference rate reform on financial reporting. Specifically, the amendments provide optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. These relate only to those contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. • Effective as of March 12, 2020 and can be adopted anytime during the period of January 1, 2020 through December 31, 2022. • Customers adopted this guidance during adoption period for certain optional expedients. • The adoption of this guidance did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. • As of March 31, 2021, Customers has not yet elected to apply optional expedients for certain contract modifications. However, we plan to elect additional optional expedients in the future. ASU 2021-01, Reference Rate Reform (Topic 848) - Scope Issued January 2021 • Clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition, including derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. • Effective as of March 12, 2020 and can be adopted anytime during the period of January 1, 2020 through December 31, 2022. • Customers adopted this guidance during adoption period for certain optional expedients. • The adoption of this guidance did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. • As of March 31, 2021, Customers has not yet elected to apply optional expedients for certain contract modifications. We plan to elect additional optional expedients in the future.

Discontinued Operations

Discontinued Operations	3 Months Ended
Discontinued Operations	Mar. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	DISCONTINUED OPERATIONS On January 4, 2021, Customers Bancorp completed the previously announced divestiture of BMT, the technology arm of its BankMobile segment, to MFAC Merger Sub Inc., an indirect wholly-owned subsidiary of MFAC, pursuant to an Agreement and Plan of Merger, dated August 6, 2020, by and among MFAC, MFAC Merger Sub Inc., BMT, Customers Bank, the sole stockholder of BMT, and Customers Bancorp, the parent bank holding company for Customers Bank (as amended on November 2, 2020 and December 8, 2020). Following the completion of the divestiture of BMT, BankMobile's serviced deposits and loans and the related net interest income have been combined with Customers' financial condition and the results of operations as a single reportable segment. Upon closing of the divestiture, Customers received cash consideration of $23.1 million and holders of Customers Bancorp's common stock who held their shares as of the close of business on December 18, 2020 became entitled to receive an aggregate of 4,876,387 shares of BM Technologies' common stock. Customers distributed 0.15389 shares of BM Technologies common stock for each share of Customers Bancorp's common stock held as of the close of business on December 18, 2020 as special dividends. Certain team members of BMT also received 1,348,748 restricted shares of BM Technologies' common stock in the form of severance payments. The total stock consideration from the divestiture that were distributed to holders of Customers Bancorp's common stock and certain BMT team members represented 52% of the outstanding common stock of BM Technologies at the closing date of the divestiture. The sale of BMT was accounted for as a sale of non-controlling interest and the merger between BMT and MFAC was accounted for as a reverse recapitalization as BMT was considered to be the accounting acquirer. Upon closing of the transaction, Customers had no remaining investment in BM Technologies. BMT's historical financial results for periods prior to the divestiture are reflected in Customers Bancorp’s consolidated financial statements as discontinued operations. The assets and liabilities of BMT have been presented as "Assets of discontinued operations" and "Liabilities of discontinued operations" on the consolidated balance sheet at December 31, 2020. BMT's operating results and associated cash flows have been presented as "Discontinued operations" within the accompanying consolidated financial statements and prior period amounts have been reclassified to conform with the current period presentation. The following summarized financial information related to BMT has been segregated from continuing operations and reported as discontinued operations for the periods presented. Three Months Ended (amounts in thousands) 2021 2020 Discontinued operations: Non-interest income $ — $ 16,072 Non-interest expense 20,354 22,794 Loss from discontinued operations before income taxes (20,354) (6,722) Income tax expense (benefit) 17,682 (1,368) Net loss from discontinued operations $ (38,036) $ (5,354) The assets and liabilities of discontinued operations on the consolidated balance sheet as of December 31, 2020 were as follows: (amounts in thousands) December 31, Carrying amounts of assets included as part of discontinued operations: Cash and cash equivalents $ 2,989 Premises and equipment, net 401 Goodwill and other intangibles 10,329 Other assets 48,336 Total assets of discontinued operations $ 62,055 Carrying amounts of liabilities included as part of discontinued operations: Borrowings from Customers Bank $ 21,000 Accrued interest payable and other liabilities 18,704 Total liabilities of discontinued operations $ 39,704 In connection with the divestiture, Customers has also entered into various agreements with BM Technologies, including a transition services agreement, software license agreement, deposit servicing agreement, non-competition agreement and loan agreement for periods ranging from one

Earnings (Loss) Per Share

Earnings (Loss) Per Share	3 Months Ended
Earnings (Loss) Per Share	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	EARNINGS (LOSS) PER SHARE The following are the components and results of Customers' earnings (loss) per common share calculations for the periods presented. Three Months Ended (amounts in thousands, except share and per share data) 2021 2020 Net income from continuing operations available to common shareholders $ 71,240 $ 4,839 Net loss from discontinued operations (38,036) (5,354) Net income available to common shareholders $ 33,204 $ (515) Weighted-average number of common shares outstanding – basic 31,883,946 31,391,151 Share-based compensation plans 957,765 — Weighted-average number of common shares – diluted 32,841,711 31,391,151 Basic earnings (loss) per common share from continuing operations $ 2.23 $ 0.15 Basic earnings (loss) per common share from discontinued operations (1.19) (0.17) Basic earnings (loss) per common share 1.04 (0.02) Diluted earnings (loss) per common share from continuing operations $ 2.17 $ 0.15 Diluted earnings (loss) per common share from discontinued operations (1.16) (0.17) Diluted earnings (loss) per common share 1.01 (0.02) The following are securities that could potentially dilute basic earnings per common share in future periods that were not included in the computation of diluted earnings per common share because either the performance conditions for certain of the share-based compensation awards have not been met or to do so would have been anti-dilutive for the periods presented. Three Months Ended 2021 2020 Share-based compensation awards 277,725 6,718,131

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) By Component	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss) By Component	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) BY COMPONENT The following tables present the changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2021 and 2020. Amounts in parentheses indicate reductions to AOCI. Three Months Ended March 31, 2021 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - December 31, 2020 $ 23,312 $ (29,076) $ (5,764) Unrealized gains (losses) arising during period, before tax 400 12,315 12,715 Income tax effect (104) (3,202) (3,306) Other comprehensive income (loss) before reclassifications 296 9,113 9,409 Reclassification adjustments for (gains) losses included in net income, before tax (23,566) 25,926 2,360 Income tax effect 6,127 (6,741) (614) Amounts reclassified from accumulated other comprehensive income (loss) to net income (17,439) 19,185 1,746 Net current-period other comprehensive income (loss) (17,143) 28,298 11,155 Balance - March 31, 2021 $ 6,169 $ (778) $ 5,391 Three Months Ended March 31, 2020 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - December 31, 2019 $ 14,287 $ (15,537) $ (1,250) Unrealized gains (losses) arising during period, before tax (9,098) (27,697) (36,795) Income tax effect 2,366 7,351 9,717 Other comprehensive income (loss) before reclassifications (6,732) (20,346) (27,078) Reclassification adjustments for losses (gains) included in net income, before tax (3,974) 1,478 (2,496) Income tax effect 1,033 (384) 649 Amounts reclassified from accumulated other comprehensive income (loss) to net income (2,941) 1,094 (1,847) Net current-period other comprehensive income (loss) (9,673) (19,252) (28,925) Balance - March 31, 2020 $ 4,614 $ (34,789) $ (30,175) (1) Reclassification amounts for AFS debt securities are reported as gain or loss on sale of investment securities on the consolidated statements of income. (2) Reclassification amounts for cash flow hedges are reported as interest expense for the applicable hedged items or loss on cash flow hedge derivative terminations on the consolidated statements of income.

Investment Securities

Investment Securities	3 Months Ended
Investment Securities	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The amortized cost and fair value of investment securities as of March 31, 2021 and December 31, 2020 are summarized in the tables below: March 31, 2021 (1) (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 381,525 $ 5,717 $ (249) $ 386,993 U.S. government agencies securities 20,000 53 — 20,053 Agency-guaranteed mortgage-backed securities 37,933 9 (308) 37,634 Agency-guaranteed collateralized mortgage obligations 211,226 365 (487) 211,104 Collateralized loan obligations 162,998 139 (43) 163,094 Commercial mortgage-backed securities 13,059 — — 13,059 Corporate notes (2) 255,126 3,422 (624) 257,924 Private label collateralized mortgage obligations 329,367 1,277 (1,955) 328,689 State and political subdivision debt securities (3) 18,481 46 — 18,527 Available for sale debt securities $ 1,429,715 $ 11,028 $ (3,666) 1,437,077 Equity securities (4) 4,827 Total investment securities, at fair value $ 1,441,904 December 31, 2020 (1) (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 372,640 $ 4,515 $ (10) $ 377,145 U.S. government agencies securities 20,000 34 — 20,034 Agency-guaranteed mortgage-backed securities 61,178 1,913 — 63,091 Agency-guaranteed collateralized mortgage obligations 160,950 916 (99) 161,767 Collateralized loan obligations 32,367 — — 32,367 Corporate notes (2) 372,764 24,144 (164) 396,744 Private label collateralized mortgage obligations 136,943 423 (374) 136,992 State and political subdivision debt securities (3) 17,346 945 — 18,291 Available for sale debt securities $ 1,174,188 $ 32,890 $ (647) 1,206,431 Equity securities (4) 3,854 Total investment securities, at fair value $ 1,210,285 (1) Accrued interest on AFS debt securities totaled $4.3 million and $4.2 million at March 31, 2021 and December 31, 2020, respectively, and is included in accrued interest receivable on the consolidated balance sheet. (2) Includes corporate securities issued by domestic bank holding companies. (3) Includes both taxable and non-taxable municipal securities. (4) Includes equity securities issued by a foreign entity. During the three months ended March 31, 2021 and 2020, Customers recognized unrealized gains of $1.0 million and unrealized losses of $1.4 million, respectively, on its equity securities. These unrealized gains and losses are reported as unrealized gain (loss) on investment securities within non-interest income on the consolidated statements of income. Proceeds from the sale of AFS securities were $353.9 million for the three months ended March 31, 2021. Proceeds from the sale of AFS securities during the three months ended March 31, 2020 were received in April 2020. Realized gains from the sale of AFS debt securities were $23.6 million and $4.0 million for the three months ended March 31, 2021 and 2020, respectively. These gains (losses) were determined using the specific identification method and were reported as gain (loss) on sale of investment securities within non-interest income on the consolidated statements of income. The following table shows debt securities by stated maturity. Debt securities backed by mortgages and other assets have expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and, therefore, these debt securities are classified separately with no specific maturity date: March 31, 2021 (amounts in thousands) Amortized Fair Due in one year or less $ — $ — Due after one year through five years 140,681 141,641 Due after five years through ten years 142,991 144,893 Due after ten years 9,935 9,970 Asset-backed securities 381,525 386,993 Collateralized loan obligations 162,998 163,094 Commercial mortgage-backed securities 13,059 13,059 Agency-guaranteed mortgage-backed securities 37,933 37,634 Private label collateralized mortgage obligations 329,367 328,689 Agency-guaranteed collateralized mortgage obligations 211,226 211,104 Total debt securities $ 1,429,715 $ 1,437,077 Gross unrealized losses and fair value of Customers' AFS debt securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2021 were as follows: March 31, 2021 Less Than 12 Months 12 Months or More Total (amounts in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale debt securities: Asset-backed securities $ 90,064 $ (249) $ — $ — $ 90,064 $ (249) Agency-guaranteed mortgage-backed securities 10,377 (308) — — 10,377 (308) Agency-guaranteed collateralized mortgage obligations 55,825 (487) — — 55,825 (487) Collateralized loan obligations 55,703 (43) — — 55,703 (43) Corporate notes 48,905 (624) — — 48,905 (624) Private label collateralized mortgage obligations 108,417 (1,955) — — 108,417 (1,955) Total $ 369,291 $ (3,666) $ — $ — $ 369,291 $ (3,666) At March 31, 2021, there were thirty AFS debt securities with unrealized losses in the less-than-twelve-month category and no AFS debt securities with unrealized losses in the twelve-month-or-more category. The unrealized losses were principally due to changes in market interest rates that resulted in a negative impact on the respective securities' fair value. All amounts related to these securities are expected to be recovered when market prices recover or at maturity. Customers does not intend to sell any of the 30 securities, and it is not more likely than not that Customers will be required to sell any of the 30 securities before recovery of the amortized cost basis. At December 31, 2020, there were sixteen AFS debt securities in an unrealized loss position. At March 31, 2021 and December 31, 2020, Customers Bank had pledged investment securities aggregating $17.6 million and $18.8 million in fair value, respectively, as collateral primarily for an unused line of credit with another financial institution. These counterparties do not have the ability to sell or repledge these securities. At March 31, 2021 and December 31, 2020, no securities holding of any one issuer, other than the U.S. government and its agencies, amounted to greater than 10% of shareholders' equity.

Loans Held for Sale

Loans Held for Sale	3 Months Ended
Loans Held for Sale	Mar. 31, 2021
Receivables Held-for-sale [Abstract]
Loans Held for Sale	LOANS HELD FOR SALE The composition of loans held for sale as of March 31, 2021 and December 31, 2020 was as follows: (amounts in thousands) March 31, 2021 December 31, 2020 Commercial loans: Multi-family loans, at lower of cost or fair value $ 19,251 $ — Commercial and industrial loans, at lower of cost or fair value — 55,683 Commercial real estate non-owner occupied loans, at lower of cost or fair value — 17,251 Total commercial loans held for sale 19,251 72,934 Consumer loans: Home equity conversion mortgages, at lower of cost or fair value 643 643 Residential mortgage loans, at fair value 1,205 5,509 Installment loans, at lower of cost or fair value 25,007 — Total consumer loans held for sale 26,855 6,152 Loans held for sale $ 46,106 $ 79,086 Total loans held for sale as of March 31, 2021 and December 31, 2020 included NPLs of $0.6 million and $18.5 million, respectively.

Loans and Leases Receivable and

Loans and Leases Receivable and Allowance for Credit Losses	3 Months Ended
Loans and Leases Receivable and Allowance for Credit Losses	Mar. 31, 2021
Receivables [Abstract]
Loans and Leases Receivable and Allowance for Credit Losses	LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES The following table presents loans and leases receivable as of March 31, 2021 and December 31, 2020. (amounts in thousands) March 31, 2021 December 31, 2020 Loans and leases receivable, mortgage warehouse, at fair value $ 3,407,622 $ 3,616,432 Loans receivable, PPP 5,178,089 4,561,365 Loans receivable: Commercial: Multi-family 1,640,278 1,761,301 Commercial and industrial (1) 2,220,652 2,289,441 Commercial real estate owner occupied 590,093 572,338 Commercial real estate non-owner occupied 1,194,832 1,196,564 Construction 156,837 140,905 Total commercial loans and leases receivable 5,802,692 5,960,549 Consumer: Residential real estate 293,805 317,170 Manufactured housing 59,977 62,243 Installment 1,380,015 1,235,406 Total consumer loans receivable 1,733,797 1,614,819 Loans and leases receivable (2) 7,536,489 7,575,368 Allowance for credit losses on loans and leases (128,736) (144,176) Total loans and leases receivable, net of allowance for credit losses on loans and leases $ 15,993,464 $ 15,608,989 (1) Includes direct finance equipment leases of $107.1 million and $108.0 million at March 31, 2021 and December 31, 2020, respectively. (2) Includes deferred (fees) costs and unamortized (discounts) premiums, net of $(133.2) million and $(54.6) million at March 31, 2021 and December 31, 2020, respectively. Customers' total loans and leases receivable portfolio includes loans receivable which are reported at fair value based on an election made to account for these loans at fair value and loans and leases receivable which are predominately reported at their outstanding unpaid principal balance, net of charge-offs and deferred costs and fees and unamortized premiums and discounts and are evaluated for impairment. The total amount of accrued interest recorded for total loans was $79.3 million and $76.6 million at March 31, 2021 and December 31, 2020, respectively, and is presented in accrued interest receivable in the consolidated balance sheet. At March 31, 2021, there were $38.8 million of individually evaluated loans that were collateral-dependent. Substantially all individually evaluated loans are collateral-dependent and consisted primarily of commercial and industrial, commercial real estate, and residential real estate loans. Collateral-dependent commercial and industrial loans were secured by accounts receivable, inventory and equipment; collateral-dependent commercial real estate loans were secured by commercial real estate assets; and residential real estate loans were secured by residential real estate assets. Loans receivable, PPP On March 27, 2020, the CARES Act was signed into law and created funding for a new product called the PPP. The PPP is administered by the SBA and is intended to assist organizations with payroll related expenses. Customers had $5.2 billion of PPP loans outstanding as of March 31, 2021, which are fully guaranteed by the SBA and earn a fixed interest rate of 1.00%. Customers recognized interest income, including origination fees, of $38.8 million for the three months ended March 31, 2021. There was no interest income recognized, including origination fees, for the three months ended March 31, 2020. PPP loans include an embedded credit enhancement from the SBA, which guarantees 100% of the principal and interest owed by the borrower. As a result, the PPP loans do not have an ACL and are therefore excluded from ACL-related disclosures. Loans receivable, mortgage warehouse, at fair value Mortgage warehouse loans consist of commercial loans to mortgage companies. These mortgage warehouse lending transactions are subject to master repurchase agreements. As a result of the contractual provisions, for accounting purposes, control of the underlying mortgage loan has not transferred and the rewards and risks of the mortgage loans are not assumed by Customers. The mortgage warehouse loans are designated as loans held for investment and reported at fair value based on an election made to account for the loans at fair value. Pursuant to the agreements, Customers funds the pipelines for these mortgage lenders by sending payments directly to the closing agents for funded mortgage loans and receives proceeds directly from third party investors when the underlying mortgage loans are sold into the secondary market. The fair value of the mortgage warehouse loans is estimated as the amount of cash initially advanced to fund the mortgage, plus accrued interest and fees, as specified in the respective agreements. The interest rates on these loans are variable, and the lending transactions are short-term, with an average life under 30 days from purchase to sale. The primary goal of these lending transactions is to provide liquidity to mortgage companies. At March 31, 2021 and December 31, 2020, all of Customers' commercial mortgage warehouse loans were current in terms of payment. As these loans are reported at their fair value, they do not have an ACL and are therefore excluded from ACL-related disclosures. Loans and leases receivable The following tables summarize loans and leases receivable by loan and lease type and performance status as of March 31, 2021 and December 31, 2020: March 31, 2021 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Loans and leases not past due (2) Total loans and leases (3) Multi-family $ 8,480 $ 1,245 $ 16,703 $ 26,428 $ 1,613,850 $ 1,640,278 Commercial and industrial 2,086 4,732 2,705 9,523 2,211,129 2,220,652 Commercial real estate owner occupied 1,920 — 2,219 4,139 585,954 590,093 Commercial real estate non-owner occupied 2,169 — 2,356 4,525 1,190,307 1,194,832 Construction — — — — 156,837 156,837 Residential real estate 2,514 235 1,324 4,073 289,732 293,805 Manufactured housing 1,403 871 1,917 4,191 55,786 59,977 Installment 5,492 2,125 78 7,695 1,372,320 1,380,015 Total $ 24,064 $ 9,208 $ 27,302 $ 60,574 $ 7,475,915 $ 7,536,489 December 31, 2020 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Loans and leases not past due (2) Total loans and leases (3) Multi-family $ 4,193 $ 5,224 $ 14,907 $ 24,324 $ 1,736,977 $ 1,761,301 Commercial and industrial 2,257 1,274 3,079 6,610 2,282,831 2,289,441 Commercial real estate owner occupied 864 1,324 2,370 4,558 567,780 572,338 Commercial real estate non-owner occupied — 60 2,356 2,416 1,194,148 1,196,564 Construction — — — — 140,905 140,905 Residential real estate 6,640 1,827 1,856 10,323 306,847 317,170 Manufactured housing 1,518 673 1,951 4,142 58,101 62,243 Installment 6,161 3,430 81 9,672 1,225,734 1,235,406 Total $ 21,633 $ 13,812 $ 26,600 $ 62,045 $ 7,513,323 $ 7,575,368 (1) Includes past due loans and leases that are accruing interest because collection is considered probable. (2) Loans and leases where next payment due is less than 30 days from the report date. The March 31, 2021 and December 31, 2020 tables exclude PPP loans of $5.2 billion and $4.6 billion, respectively, which are all current as of March 31, 2021 and December 31, 2020. (3) Includes PCD loans of $12.5 million and $13.4 million at March 31, 2021 and December 31, 2020, respectively. Nonaccrual Loans and Leases The following table presents the amortized cost of loans and leases held for investment on nonaccrual status. March 31, 2021 (1) December 31, 2020 (1) (amounts in thousands) Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Multi-family $ 20,530 $ — $ 20,530 $ 18,800 $ 2,928 $ 21,728 Commercial and industrial 7,282 262 7,544 6,384 2,069 8,453 Commercial real estate owner occupied 3,242 — 3,242 3,411 — 3,411 Commercial real estate non-owner occupied 2,259 97 2,356 2,356 — 2,356 Residential real estate 9,353 — 9,353 9,911 — 9,911 Manufactured housing — 2,871 2,871 — 2,969 2,969 Installment — 2,185 2,185 — 3,211 3,211 Total $ 42,666 $ 5,415 $ 48,081 $ 40,862 $ 11,177 $ 52,039 (1) Presented at amortized cost basis. Interest income recognized on nonaccrual loans was insignificant for the three months ended March 31, 2021 and 2020. Accrued interest of $16 thousand and $1.2 million was reversed when the loans went to nonaccrual status during the three months ended March 31, 2021 and 2020, respectively. Allowance for credit losses on loans and leases The changes in the ACL on loans and leases for the three months ended March 31, 2021 and 2020 are presented in the tables below. Three Months Ended March 31, 2021 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total (amounts in thousands) Ending Balance, $ 12,620 $ 12,239 $ 9,512 $ 19,452 $ 5,871 $ 3,977 $ 5,190 $ 75,315 $ 144,176 Charge-offs (1,132) (635) (142) — — (50) — (12,687) (14,646) Recoveries — 260 8 10 5 10 — 1,832 2,125 Provision (benefit) for credit losses (3,462) (4,361) (3,443) (7,841) (1,773) (728) (390) 19,079 (2,919) Ending Balance, $ 8,026 $ 7,503 $ 5,935 $ 11,621 $ 4,103 $ 3,209 $ 4,800 $ 83,539 $ 128,736 Three Months Ended March 31, 2020 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total (amounts in thousands) Ending Balance, $ 6,157 $ 15,556 $ 2,235 $ 6,243 $ 1,262 $ 3,218 $ 1,060 $ 20,648 $ 56,379 Cumulative effect of change in accounting principle 2,171 759 5,773 7,918 (98) 1,518 3,802 57,986 79,829 Charge-offs — (97) — (12,797) — — — (6,246) (19,140) Recoveries — 54 3 — 3 29 — 340 429 Provision (benefit) for credit losses 422 2,534 516 17,166 767 (585) 125 10,841 31,786 Ending Balance, $ 8,750 $ 18,806 $ 8,527 $ 18,530 $ 1,934 $ 4,180 $ 4,987 $ 83,569 $ 149,283 At March 31, 2021, the ACL was $128.7 million, a decrease of $15.5 million from the December 31, 2020 balance of $144.2 million. The decrease resulted primarily from a decrease in provision for credit losses from continuing improvement in macroeconomic forecasts. The increase in ACL for the installment portfolio is mainly due to loan portfolio growth. Troubled Debt Restructurings At March 31, 2021 and December 31, 2020, there were $16.0 million and $16.1 million, respectively, in loans reported as TDRs. TDRs are reported as impaired loans in the quarter of their restructuring and are evaluated to determine whether they should be placed on non-accrual status. In subsequent quarters, a TDR may be returned to accrual status if it satisfies a minimum performance requirement of six months, however, it will remain classified as impaired. Generally, the Bank requires sustained performance for nine months before returning a TDR to accrual status. Customers had no lease receivables that had been restructured as a TDR as of March 31, 2021 and December 31, 2020, respectively. The CARES Act and certain regulatory agencies recently issued guidance stating certain loan modifications to borrowers experiencing financial distress as a result of the economic impacts created by COVID-19 may not be required to be treated as TDRs under U.S. GAAP. For COVID-19 related loan modifications which met the loan modification criteria under either the CARES Act or the criteria specified by the regulatory agencies, Customers elected to suspend TDR accounting for such loan modifications. At March 31, 2021, commercial and consumer deferments related to COVID-19 were $176.1 million and $13.0 million, respectively. The following table presents loans modified in a TDR by type of concession for the three months ended March 31, 2021 and 2020. There were no modifications that involved forgiveness of debt for the three months ended March 31, 2021 and 2020. Three Months Ended March 31, 2021 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Extensions of maturity — $ — 4 $ 245 Interest-rate reductions 8 184 12 530 Other (1) 20 541 — — Total 28 $ 725 16 $ 775 (1) Other includes covenant modifications, forbearance, loans discharged under Chapter 7 bankruptcy, or other concessions. As of March 31, 2021 and December 31, 2020, there were no commitments to lend additional funds to debtors whose loans have been modified in TDRs. The following table presents, by loan type, the number of loans modified in TDRs and the related recorded investment, for which there was a payment default within twelve months following the modification: March 31, 2021 March 31, 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Manufactured housing 3 $ 48 — $ — Commercial real estate owner occupied — — 1 8 Residential real estate 1 56 5 684 Installment 16 250 — — Total loans 20 $ 354 6 $ 692 Loans modified in TDRs are evaluated for impairment. The nature and extent of impairment of TDRs, including those which have experienced a subsequent default, is considered in the determination of an appropriate level of ACL. Purchased Credit-Deteriorated Loans Customers adopted ASC 326 Financial Instruments - Credit Losses ("ASC 326") using the prospective transition approach for financial assets purchased with credit deterioration that were previously classified as PCI and accounted for under ASC 310-30. In accordance with the standard, Customers did not reassess whether PCI assets met the criteria of PCD assets as of the date of adoption. As of March 31, 2021, the amortized cost basis of PCD assets amounted to $12.5 million. Credit Quality Indicators The ACL represents management's estimate of expected losses in Customers' loans and leases receivable portfolio, excluding commercial mortgage warehouse loans reported at fair value pursuant to a fair value option election and PPP loans receivable. Multi-family, commercial and industrial, owner occupied commercial real estate, non-owner occupied commercial real estate, and construction loans are rated based on an internally assigned risk rating system which is assigned at the time of loan origination and reviewed on a periodic, or on an “as needed” basis. Residential real estate loans, manufactured housing and installment loans are evaluated based on the payment activity of the loan. To facilitate the monitoring of credit quality within the multi-family, commercial and industrial, owner occupied commercial real estate, non-owner occupied commercial real estate, and construction loan portfolios, and as an input in the ACL lifetime loss rate model for the commercial and industrial loan portfolio, the Bank utilizes the following categories of risk ratings: pass/satisfactory (includes risk rating 1 through 6), special mention, substandard, doubtful, and loss. The risk rating categories, which are derived from standard regulatory rating definitions, are assigned upon initial approval of credit to borrowers and updated periodically thereafter. Pass/satisfactory ratings, which are assigned to those borrowers who do not have identified potential or well-defined weaknesses and for whom there is a high likelihood of orderly repayment, are updated periodically based on the size and credit characteristics of the borrower. All other categories are updated on a quarterly basis during the month preceding the end of the calendar quarter. While assigning risk ratings involves judgment, the risk-rating process allows management to identify riskier credits in a timely manner and allocate the appropriate resources to manage those loans and leases. The 2020 Form 10-K describes Customers Bancorp’s risk rating grades. Risk ratings are not established for certain consumer loans, including residential real estate, home equity, manufactured housing, and installment loans, mainly because these portfolios consist of a larger number of homogeneous loans with smaller balances. Instead, these portfolios are evaluated for risk mainly based upon aggregate payment history through the monitoring of delinquency levels and trends and are classified as performing and non-performing. The following tables present the credit ratings of loans and leases receivable as of March 31, 2021 and December 31, 2020. Term Loans Amortized Cost Basis by Origination Year as of March 31, 2021 (amounts in thousands) 2021 2020 2019 2018 2017 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Multi-family loans: Pass $ 90,497 $ 130,496 $ 22,678 $ 275,379 $ 418,365 $ 565,953 $ — $ — $ 1,503,368 Special mention — — — — 20,279 36,870 — — 57,149 Substandard — — — — 50,078 29,683 — — 79,761 Doubtful — — — — — — — Total multi-family loans $ 90,497 $ 130,496 $ 22,678 $ 275,379 $ 488,722 $ 632,506 $ — $ — $ 1,640,278 Commercial and industrial loans and leases: Pass $ 274,698 $ 448,597 $ 335,492 $ 139,864 $ 109,093 $ 112,621 $ 692,981 $ — $ 2,113,346 Special mention 16,935 13,200 1,044 563 33 258 16,342 — 48,375 Substandard — 10,856 6,619 18,049 7,148 7,752 8,507 — 58,931 Doubtful — — — — — — — — Total commercial and industrial loans and leases $ 291,633 $ 472,653 $ 343,155 $ 158,476 $ 116,274 $ 120,631 $ 717,830 $ — $ 2,220,652 Commercial real estate owner occupied loans: Pass $ 33,144 $ 82,661 $ 167,487 $ 71,146 $ 61,561 $ 133,469 $ 672 $ — $ 550,140 Special mention — — 4,286 — 11,010 292 — — 15,588 Substandard — — 2,848 9,538 240 11,739 — — 24,365 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 33,144 $ 82,661 $ 174,621 $ 80,684 $ 72,811 $ 145,500 $ 672 $ — $ 590,093 Commercial real estate non-owner occupied: Pass $ 11,186 $ 120,080 $ 94,136 $ 95,355 $ 120,861 $ 423,438 $ 14,019 $ — $ 879,075 Special mention — 61,994 11,285 996 99,671 53,340 — — 227,286 Substandard — — — 17,741 20,611 50,119 — — 88,471 Doubtful — — — — — — — — Total commercial real estate non-owner occupied loans $ 11,186 $ 182,074 $ 105,421 $ 114,092 $ 241,143 $ 526,897 $ 14,019 $ — $ 1,194,832 Construction: Pass $ 971 $ 28,168 $ 110,973 $ 4,921 $ — $ 9,627 $ 667 $ — $ 155,327 Special mention — 1,510 — — — — — — 1,510 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 971 $ 29,678 $ 110,973 $ 4,921 $ — $ 9,627 $ 667 $ — $ 156,837 Total commercial loans and leases receivable $ 427,431 $ 897,562 $ 756,848 $ 633,552 $ 918,950 $ 1,435,161 $ 733,188 $ — $ 5,802,692 Residential real estate loans: Performing $ 2,573 $ 11,110 $ 14,660 $ 12,060 $ 7,379 $ 105,969 $ 131,018 $ — $ 284,769 Non-performing — — 98 906 780 4,785 2,467 — 9,036 Total residential real estate loans $ 2,573 $ 11,110 $ 14,758 $ 12,966 $ 8,159 $ 110,754 $ 133,485 $ — $ 293,805 Manufactured housing loans: Performing $ — $ — $ 300 $ 443 $ 77 $ 54,394 $ — $ — $ 55,214 Non-performing — — — — — 4,763 — — 4,763 Total manufactured housing loans $ — $ — $ 300 $ 443 $ 77 $ 59,157 $ — $ — $ 59,977 Installment loans: Performing $ 204,365 $ 476,856 $ 599,887 $ 91,009 $ 3,633 $ 1,249 $ — $ — $ 1,376,999 Non-performing — 341 2,117 437 33 88 — — 3,016 Total installment loans $ 204,365 $ 477,197 $ 602,004 $ 91,446 $ 3,666 $ 1,337 $ — $ — $ 1,380,015 Total consumer loans $ 206,938 $ 488,307 $ 617,062 $ 104,855 $ 11,902 $ 171,248 $ 133,485 $ — $ 1,733,797 Loans and leases receivable $ 634,369 $ 1,385,869 $ 1,373,910 $ 738,407 $ 930,852 $ 1,606,409 $ 866,673 $ — $ 7,536,489 Term Loans Amortized Cost Basis by Origination Year as of December 31, 2020 (amounts in thousands) 2020 2019 2018 2017 2016 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Multi-family loans: Pass $ 150,835 $ 23,716 $ 299,319 $ 535,510 $ 227,296 $ 420,809 $ — $ — $ 1,657,485 Special mention — — — 20,901 10,394 26,708 — — 58,003 Substandard — — — 34,197 8,256 3,360 — — 45,813 Doubtful — — — — — — — — — Total multi-family loans $ 150,835 $ 23,716 $ 299,319 $ 590,608 $ 245,946 $ 450,877 $ — $ — $ 1,761,301 Commercial and industrial loans and leases: Pass $ 729,270 $ 373,050 $ 141,943 $ 116,793 $ 45,367 $ 71,502 $ 717,007 $ — $ 2,194,932 Special mention 13,200 1,117 436 113 516 21 17,524 — 32,927 Substandard 9,968 6,890 19,065 5,901 8,318 2,722 8,718 — 61,582 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 752,438 $ 381,057 $ 161,444 $ 122,807 $ 54,201 $ 74,245 $ 743,249 $ — $ 2,289,441 Commercial real estate owner occupied loans: Pass $ 82,343 $ 168,977 $ 72,615 $ 70,642 $ 46,510 $ 91,798 $ 741 $ — $ 533,626 Special mention — 4,464 — 9,056 — 555 — — 14,075 Substandard — 2,848 9,499 342 2,231 9,717 — — 24,637 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 82,343 $ 176,289 $ 82,114 $ 80,040 $ 48,741 $ 102,070 $ 741 $ — $ 572,338 Commercial real estate non-owner occupied: Pass $ 143,231 $ 105,430 $ 97,882 $ 157,835 $ 155,168 $ 313,559 $ — $ — $ 973,105 Special mention 39,994 — — 66,745 24,218 14,613 — — 145,570 Substandard — — 17,741 20,611 366 39,171 — — 77,889 Doubtful — — — — — — — — Total commercial real estate non-owner occupied loans $ 183,225 $ 105,430 $ 115,623 $ 245,191 $ 179,752 $ 367,343 $ — $ — $ 1,196,564 Construction: Pass $ 19,932 $ 105,466 $ 4,954 $ — $ 9,700 $ — $ 853 $ — $ 140,905 Special mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 19,932 $ 105,466 $ 4,954 $ — $ 9,700 $ — $ 853 $ — $ 140,905 Total commercial loans and leases receivable $ 1,188,773 $ 791,958 $ 663,454 $ 1,038,646 $ 538,340 $ 994,535 $ 744,843 $ — $ 5,960,549 Residential real estate loans: Performing $ 6,708 $ 13,617 $ 6,810 $ 10,850 $ 38,143 $ 69,496 $ 161,576 $ — $ 307,200 Non-performing — — 160 785 1,350 4,395 3,280 — 9,970 Total residential real estate loans $ 6,708 $ 13,617 $ 6,970 $ 11,635 $ 39,493 $ 73,891 $ 164,856 $ — $ 317,170 Manufactured housing loans: Performing $ — $ 295 $ 609 $ 76 $ 41 $ 56,837 $ — $ — $ 57,858 Non-performing — — — — — 4,385 — — 4,385 Total manufactured housing loans $ — $ 295 $ 609 $ 76 $ 41 $ 61,222 $ — $ — $ 62,243 Installment loans: Performing $ 319,453 $ 791,235 $ 114,988 $ 4,736 $ 514 $ 1,204 $ — $ — $ 1,232,130 Non-performing 305 2,326 485 41 2 117 — — 3,276 Total installment loans $ 319,758 $ 793,561 $ 115,473 $ 4,777 $ 516 $ 1,321 $ — $ — $ 1,235,406 Total consumer loans $ 326,466 $ 807,473 $ 123,052 $ 16,488 $ 40,050 $ 136,434 $ 164,856 $ — $ 1,614,819 Loans and leases receivable $ 1,515,239 $ 1,599,431 $ 786,506 $ 1,055,134 $ 578,390 $ 1,130,969 $ 909,699 $ — $ 7,575,368 Loan Purchases and Sales Purchases and sales of loans were as follows for the three months ended March 31, 2021 and 2020: Three Months Ended March 31, (amounts in thousands) 2021 2020 Purchases (1) Residential real estate $ — $ 495 Installment (2) 115,849 191,761 Total $ 115,849 $ 192,256 Sales (3) Commercial and industrial $ 18,931 $ — Commercial real estate owner occupied 2,237 — Commercial real estate non-owner occupied 18,366 — Installment — 1,822 Total $ 39,534 $ 1,822 (1) Amounts reported in the above table are the unpaid principal balance at time of purchase. The purchase price was 101.0% and 100.6% of loans outstanding for the three months ended March 31, 2021 and 2020, respectively. (2) Installment loan purchases for the three months ended March 31, 2021 and 2020 consist of third-party originated unsecured consumer loans. None of the loans are considered sub-prime at the time of origination. Customers considers sub-prime borrowers to be those with FICO scores below 660. (3) Amounts reported in the above table are the unpaid principal balance at time of sale. For the quarters ended March 31, 2021 and 2020, loan sales resulted in net gains of $1.6 million and $11 thousand, respectively. Loans Pledged as Collateral Customers has pledged eligible real estate and commercial and industrial loans, including PPP loans as collateral for borrowings from the FHLB and FRB in the amount of $6.8 billion and $8.5 billion at March 31, 2021 and December 31, 2020, respectively. PPP loans of $3.3 billion and $4.6 billion were pledged to the FRB in accordance with borrowing from the PPPLF at March 31, 2021 and December 31, 2020, respectively.

Leases

Leases	3 Months Ended
Leases	Mar. 31, 2021
Leases [Abstract]
Leases	LEASES Lessee Customers has operating leases for its branches, LPOs, and administrative offices, with remaining lease terms ranging between 5 months and 6 years. These operating leases comprise substantially all of Customers' obligations in which Customers is the lessee. Most lease agreements consist of initial lease terms ranging between 1 and 5 years, with options to renew the leases or extend the term up to 15 years at Customers' sole discretion. Some operating leases include variable lease payments that are based on an index or rate, such as the CPI. Variable lease payments are not included in the liability or right of use asset and are recognized in the period in which the obligation for those payments are incurred. Customers' operating lease agreements do not contain any material residual value guarantees or material restrictive covenants. Pursuant to these agreements, Customers does not have any commitments that would meet the definition of a finance lease. As most of Customers' operating leases do not provide an implicit rate, Customers utilized its incremental borrowing rate based on the information available at either the adoption of ASC 842, Leases or the commencement date of the lease, whichever was later, when determining the present value of lease payments. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 15,442 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 16,829 $ 18,005 (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations. The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,117 $ 1,205 (1) There were no variable lease costs for the three months ended March 31, 2021 and 2020, and sublease income for operating leases is immaterial. (2) Excludes operating lease costs of BMT included in loss from discontinued operations in the consolidated statement of income. Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2021: (amounts in thousands) March 31, 2021 2021 $ 3,477 2022 4,509 2023 4,031 2024 2,957 2025 1,887 Thereafter 1,465 Total minimum payments 18,326 Less: interest 1,497 Present value of lease liabilities $ 16,829 Customers does not have leases where it is involved with the construction or design of an underlying asset. Customers has no legally binding minimum lease payments for leases signed but not yet commenced as of March 31, 2021. Cash paid pursuant to the operating lease liability was $1.1 million and $1.3 million for the three months ended March 31, 2021 and 2020, respectively. These payments were reported as cash flows used in operating activities in the statement of cash flows. The following table summarizes the weighted average remaining lease term and discount rate for Customers' operating leases at March 31, 2021 and December 31, 2020: (amounts in thousands) March 31, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.5 years 4.7 years Weighted average discount rate Operating leases (1) 2.89 % 2.90 % (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations. Equipment Lessor CCF is a wholly-owned subsidiary of Customers Bank and is referred to as the Equipment Finance Group. CCF is primarily focused on originating equipment operating and direct finance equipment leases for a broad range of asset classes. It services vendors, dealers, independent finance companies, bank-owned leasing companies and strategic direct customers in the plastics, packaging, machine tool, construction, transportation and franchise markets. Lease terms typically range from 24 months to 120 months. CCF offers the following lease products: Capital Lease, Purchase Upon Termination, TRAC, Split-TRAC, and FMV. Direct finance equipment leases are included in commercial and industrial loans and leases receivable. The estimated residual values for direct finance and operating leases are established by utilizing internally developed analyses, external studies, and/or third-party appraisals to establish a residual position. For the direct finance leases, only Customers' Split-TRAC leases have residual risk and the unguaranteed portions are typically nominal. Expected credit losses on direct financing leases and the related estimated residual values are included in the allowance for credit losses on loans and leases. Leased assets under operating leases are carried at amortized cost net of accumulated depreciation and any impairment charges and are presented in other assets. The depreciation expense of the leased assets is recognized on a straight-line basis over the contractual term of the leases up to the expected residual value. The expected residual value and, accordingly, the monthly depreciation expense, may change throughout the term of the lease. Operating lease rental income for leased assets is recognized in commercial lease income on a straight-line basis over the lease term. Customers periodically reviews its operating leased assets for impairment. An impairment loss is recognized if the carrying amount of the operating leased asset exceeds its fair value and is not recoverable. The carrying amount of operating leased assets is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the lease payments and the estimated residual value upon the eventual disposition of the equipment. The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2021 and December 31, 2020: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 104,230 $ 104,982 Guaranteed residual assets Loans and leases receivable 9,452 12,988 Unguaranteed residual assets Loans and leases receivable 3,807 1,229 Deferred initial direct costs Loans and leases receivable 528 560 Unearned income Loans and leases receivable (10,433) (11,175) Net investment in direct financing leases $ 107,584 $ 108,584 Operating leases Investment in operating leases Other assets $ 136,754 $ 131,791 Accumulated depreciation Other assets (33,204) (28,919) Deferred initial direct costs Other assets 1,113 996 Net investment in operating leases 104,663 103,868 Total lease assets $ 212,247 $ 212,452 COVID-19 Impact on Leases Customers granted concessions to lessees as a result of the business impact of the COVID-19 pandemic. At March 31, 2021, the book value of finance and operating leases with payment deferments were $29.3 million and $14.5 million, respectively. The concessions did not have a material impact on interest income from leases for the three months ended March 31, 2021. Additionally, Customers did not receive any concessions on its operating leases in which Customers is the lessee.
Leases	LEASES Lessee Customers has operating leases for its branches, LPOs, and administrative offices, with remaining lease terms ranging between 5 months and 6 years. These operating leases comprise substantially all of Customers' obligations in which Customers is the lessee. Most lease agreements consist of initial lease terms ranging between 1 and 5 years, with options to renew the leases or extend the term up to 15 years at Customers' sole discretion. Some operating leases include variable lease payments that are based on an index or rate, such as the CPI. Variable lease payments are not included in the liability or right of use asset and are recognized in the period in which the obligation for those payments are incurred. Customers' operating lease agreements do not contain any material residual value guarantees or material restrictive covenants. Pursuant to these agreements, Customers does not have any commitments that would meet the definition of a finance lease. As most of Customers' operating leases do not provide an implicit rate, Customers utilized its incremental borrowing rate based on the information available at either the adoption of ASC 842, Leases or the commencement date of the lease, whichever was later, when determining the present value of lease payments. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 15,442 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 16,829 $ 18,005 (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations. The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,117 $ 1,205 (1) There were no variable lease costs for the three months ended March 31, 2021 and 2020, and sublease income for operating leases is immaterial. (2) Excludes operating lease costs of BMT included in loss from discontinued operations in the consolidated statement of income. Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2021: (amounts in thousands) March 31, 2021 2021 $ 3,477 2022 4,509 2023 4,031 2024 2,957 2025 1,887 Thereafter 1,465 Total minimum payments 18,326 Less: interest 1,497 Present value of lease liabilities $ 16,829 Customers does not have leases where it is involved with the construction or design of an underlying asset. Customers has no legally binding minimum lease payments for leases signed but not yet commenced as of March 31, 2021. Cash paid pursuant to the operating lease liability was $1.1 million and $1.3 million for the three months ended March 31, 2021 and 2020, respectively. These payments were reported as cash flows used in operating activities in the statement of cash flows. The following table summarizes the weighted average remaining lease term and discount rate for Customers' operating leases at March 31, 2021 and December 31, 2020: (amounts in thousands) March 31, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.5 years 4.7 years Weighted average discount rate Operating leases (1) 2.89 % 2.90 % (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations. Equipment Lessor CCF is a wholly-owned subsidiary of Customers Bank and is referred to as the Equipment Finance Group. CCF is primarily focused on originating equipment operating and direct finance equipment leases for a broad range of asset classes. It services vendors, dealers, independent finance companies, bank-owned leasing companies and strategic direct customers in the plastics, packaging, machine tool, construction, transportation and franchise markets. Lease terms typically range from 24 months to 120 months. CCF offers the following lease products: Capital Lease, Purchase Upon Termination, TRAC, Split-TRAC, and FMV. Direct finance equipment leases are included in commercial and industrial loans and leases receivable. The estimated residual values for direct finance and operating leases are established by utilizing internally developed analyses, external studies, and/or third-party appraisals to establish a residual position. For the direct finance leases, only Customers' Split-TRAC leases have residual risk and the unguaranteed portions are typically nominal. Expected credit losses on direct financing leases and the related estimated residual values are included in the allowance for credit losses on loans and leases. Leased assets under operating leases are carried at amortized cost net of accumulated depreciation and any impairment charges and are presented in other assets. The depreciation expense of the leased assets is recognized on a straight-line basis over the contractual term of the leases up to the expected residual value. The expected residual value and, accordingly, the monthly depreciation expense, may change throughout the term of the lease. Operating lease rental income for leased assets is recognized in commercial lease income on a straight-line basis over the lease term. Customers periodically reviews its operating leased assets for impairment. An impairment loss is recognized if the carrying amount of the operating leased asset exceeds its fair value and is not recoverable. The carrying amount of operating leased assets is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the lease payments and the estimated residual value upon the eventual disposition of the equipment. The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2021 and December 31, 2020: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 104,230 $ 104,982 Guaranteed residual assets Loans and leases receivable 9,452 12,988 Unguaranteed residual assets Loans and leases receivable 3,807 1,229 Deferred initial direct costs Loans and leases receivable 528 560 Unearned income Loans and leases receivable (10,433) (11,175) Net investment in direct financing leases $ 107,584 $ 108,584 Operating leases Investment in operating leases Other assets $ 136,754 $ 131,791 Accumulated depreciation Other assets (33,204) (28,919) Deferred initial direct costs Other assets 1,113 996 Net investment in operating leases 104,663 103,868 Total lease assets $ 212,247 $ 212,452 COVID-19 Impact on Leases Customers granted concessions to lessees as a result of the business impact of the COVID-19 pandemic. At March 31, 2021, the book value of finance and operating leases with payment deferments were $29.3 million and $14.5 million, respectively. The concessions did not have a material impact on interest income from leases for the three months ended March 31, 2021. Additionally, Customers did not receive any concessions on its operating leases in which Customers is the lessee.
Leases	LEASES Lessee Customers has operating leases for its branches, LPOs, and administrative offices, with remaining lease terms ranging between 5 months and 6 years. These operating leases comprise substantially all of Customers' obligations in which Customers is the lessee. Most lease agreements consist of initial lease terms ranging between 1 and 5 years, with options to renew the leases or extend the term up to 15 years at Customers' sole discretion. Some operating leases include variable lease payments that are based on an index or rate, such as the CPI. Variable lease payments are not included in the liability or right of use asset and are recognized in the period in which the obligation for those payments are incurred. Customers' operating lease agreements do not contain any material residual value guarantees or material restrictive covenants. Pursuant to these agreements, Customers does not have any commitments that would meet the definition of a finance lease. As most of Customers' operating leases do not provide an implicit rate, Customers utilized its incremental borrowing rate based on the information available at either the adoption of ASC 842, Leases or the commencement date of the lease, whichever was later, when determining the present value of lease payments. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 15,442 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 16,829 $ 18,005 (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations. The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,117 $ 1,205 (1) There were no variable lease costs for the three months ended March 31, 2021 and 2020, and sublease income for operating leases is immaterial. (2) Excludes operating lease costs of BMT included in loss from discontinued operations in the consolidated statement of income. Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2021: (amounts in thousands) March 31, 2021 2021 $ 3,477 2022 4,509 2023 4,031 2024 2,957 2025 1,887 Thereafter 1,465 Total minimum payments 18,326 Less: interest 1,497 Present value of lease liabilities $ 16,829 Customers does not have leases where it is involved with the construction or design of an underlying asset. Customers has no legally binding minimum lease payments for leases signed but not yet commenced as of March 31, 2021. Cash paid pursuant to the operating lease liability was $1.1 million and $1.3 million for the three months ended March 31, 2021 and 2020, respectively. These payments were reported as cash flows used in operating activities in the statement of cash flows. The following table summarizes the weighted average remaining lease term and discount rate for Customers' operating leases at March 31, 2021 and December 31, 2020: (amounts in thousands) March 31, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.5 years 4.7 years Weighted average discount rate Operating leases (1) 2.89 % 2.90 % (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations. Equipment Lessor CCF is a wholly-owned subsidiary of Customers Bank and is referred to as the Equipment Finance Group. CCF is primarily focused on originating equipment operating and direct finance equipment leases for a broad range of asset classes. It services vendors, dealers, independent finance companies, bank-owned leasing companies and strategic direct customers in the plastics, packaging, machine tool, construction, transportation and franchise markets. Lease terms typically range from 24 months to 120 months. CCF offers the following lease products: Capital Lease, Purchase Upon Termination, TRAC, Split-TRAC, and FMV. Direct finance equipment leases are included in commercial and industrial loans and leases receivable. The estimated residual values for direct finance and operating leases are established by utilizing internally developed analyses, external studies, and/or third-party appraisals to establish a residual position. For the direct finance leases, only Customers' Split-TRAC leases have residual risk and the unguaranteed portions are typically nominal. Expected credit losses on direct financing leases and the related estimated residual values are included in the allowance for credit losses on loans and leases. Leased assets under operating leases are carried at amortized cost net of accumulated depreciation and any impairment charges and are presented in other assets. The depreciation expense of the leased assets is recognized on a straight-line basis over the contractual term of the leases up to the expected residual value. The expected residual value and, accordingly, the monthly depreciation expense, may change throughout the term of the lease. Operating lease rental income for leased assets is recognized in commercial lease income on a straight-line basis over the lease term. Customers periodically reviews its operating leased assets for impairment. An impairment loss is recognized if the carrying amount of the operating leased asset exceeds its fair value and is not recoverable. The carrying amount of operating leased assets is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the lease payments and the estimated residual value upon the eventual disposition of the equipment. The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2021 and December 31, 2020: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 104,230 $ 104,982 Guaranteed residual assets Loans and leases receivable 9,452 12,988 Unguaranteed residual assets Loans and leases receivable 3,807 1,229 Deferred initial direct costs Loans and leases receivable 528 560 Unearned income Loans and leases receivable (10,433) (11,175) Net investment in direct financing leases $ 107,584 $ 108,584 Operating leases Investment in operating leases Other assets $ 136,754 $ 131,791 Accumulated depreciation Other assets (33,204) (28,919) Deferred initial direct costs Other assets 1,113 996 Net investment in operating leases 104,663 103,868 Total lease assets $ 212,247 $ 212,452 COVID-19 Impact on Leases Customers granted concessions to lessees as a result of the business impact of the COVID-19 pandemic. At March 31, 2021, the book value of finance and operating leases with payment deferments were $29.3 million and $14.5 million, respectively. The concessions did not have a material impact on interest income from leases for the three months ended March 31, 2021. Additionally, Customers did not receive any concessions on its operating leases in which Customers is the lessee.

Borrowings

Borrowings	3 Months Ended
Borrowings	Mar. 31, 2021
Debt Disclosure [Abstract]
Borrowings	BORROWINGS Short-term debt Short-term debt at March 31, 2021 and December 31, 2020 was as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ 850,000 1.21 % $ 850,000 1.19 % Federal funds purchased 365,000 0.05 % 250,000 0.09 % Total short-term debt $ 1,215,000 $ 1,100,000 The following is a summary of additional information relating to Customers' short-term debt: (dollars in thousands) March 31, 2021 December 31, 2020 FHLB advances Maximum outstanding at any month end $ 850,000 $ 910,000 Average balance during the period 850,000 809,788 Weighted-average interest rate during the period 2.48 % 2.31 % Federal funds purchased Maximum outstanding at any month end 365,000 842,000 Average balance during the period 16,333 239,481 Weighted-average interest rate during the period 0.07 % 0.19 % At March 31, 2021 and December 31, 2020, Customers Bank had aggregate availability under federal funds lines totaling $1.1 billion and $924.0 million, respectively. Long-term debt FHLB and FRB advances Long-term FHLB and FRB advances at March 31, 2021 and December 31, 2020 were as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FRB PPP Liquidity Facility advances $ 3,284,156 0.35 % $ 4,415,016 0.35 % Total long-term FHLB and FRB advances $ 3,284,156 $ 4,415,016 Beginning in second quarter 2020, Customers began participating in the PPPLF, in which Federal Reserve Banks extend non-recourse loans to institutions that are eligible to make PPP loans. Only PPP loans that are guaranteed by the SBA under the PPP, with respect to both principal and interest that are originated or purchased by an eligible institution, may be pledged as collateral to the Federal Reserve Banks. The maximum borrowing capacity with the FHLB and FRB at March 31, 2021 and December 31, 2020 was as follows: (amounts in thousands) March 31, 2021 December 31, 2020 Total maximum borrowing capacity with the FHLB $ 2,492,783 $ 2,729,516 Total maximum borrowing capacity with the FRB (1) 183,124 223,299 Qualifying loans serving as collateral against FHLB and FRB advances (1) 3,258,271 3,363,364 (1) Amounts reported in the above table exclude borrowings under the PPPLF, which are limited to the face value of the loans originated under the PPP. At March 31, 2021, Customers had $3.3 billion of borrowings under the PPPLF, with a borrowing capacity of up to $5.2 billion, which is the face value of the qualifying loans Customers has originated and outstanding under the PPP. At December 31, 2020, Customers had $4.4 billion of borrowings under the PPPLF. Senior and Subordinated Debt Long-term senior notes and subordinated debt at March 31, 2021 and December 31, 2020 were as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Issued by Ranking Amount Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior $ 24,581 $ 24,552 4.500 % $ 25,000 September 2019 September 2024 100.000 % Customers Bancorp Senior 99,557 99,485 3.950 % 100,000 June 2017 June 2022 99.775 % Total other borrowings $ 124,138 $ 124,037 Customers Bancorp Subordinated (1)(2) $ 72,267 $ 72,222 5.375 % $ 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (1)(3) 109,197 109,172 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 181,464 $ 181,394 (1) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (2) Customers Bancorp has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after December 30, 2029. (3) The subordinated notes will bear an annual fixed rate of 6.125% until June 26, 2024. From June 26, 2024 until maturity, the notes will bear an annual interest rate equal to the three-month LIBOR plus 344.3 basis points. Customers Bank has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after June 26, 2024.

Regulatory Capital

Regulatory Capital	3 Months Ended
Regulatory Capital	Mar. 31, 2021
Regulatory Capital [Abstract]
Regulatory Capital	REGULATORY CAPITAL The Bank and the Bancorp are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet the minimum capital requirements can result in certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on Customers' financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank and the Bancorp must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items, as calculated under the regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Prompt corrective action provisions are not applicable to bank holding companies. In first quarter 2020, U.S federal banking regulatory agencies permitted banking organizations to phase-in, for regulatory capital purposes, the day-one impact of the new CECL accounting rule on retained earnings over a period of three years. As part of its response to the impact of COVID-19, on March 31, 2020, the U.S. federal banking regulatory agencies issued an interim final rule that provided the option to temporarily delay certain effects of CECL on regulatory capital for two years, followed by a three-year transition period. The interim final rule allows banking organizations to delay for two years 100% of the day-one impact of adopting CECL and 25% of the cumulative change in the reported allowance for credit losses since adopting CECL. Customers has elected to adopt the interim final rule, which is reflected in the regulatory capital data presented below. In April 2020, the U.S. federal banking regulatory agencies issued an interim final rule that permits banks to exclude the impact of participating in the SBA PPP program in their regulatory capital ratios. Specifically, PPP loans are zero percent risk weighted and a bank can exclude all PPP loans pledged as collateral to the PPPLF from its average total consolidated assets for purposes of calculating the Tier 1 capital to average assets ratio (i.e. leverage ratio). Customers applied this regulatory guidance in the calculation of its regulatory capital ratios presented below. Quantitative measures established by regulation to ensure capital adequacy require the Bank and the Bancorp to maintain minimum amounts and ratios (set forth in the following table) of common equity Tier 1, Tier 1, and total capital to risk-weighted assets, and Tier 1 capital to average assets (as defined in the regulations). At March 31, 2021 and December 31, 2020, the Bank and the Bancorp satisfied all capital requirements to which they were subject. Generally, to comply with the regulatory definition of adequately capitalized, or well capitalized, respectively, or to comply with the Basel III capital requirements, an institution must at least maintain the common equity Tier 1, Tier 1 and total risk-based capital ratios and the Tier 1 leverage ratio in excess of the related minimum ratios as set forth in the following table: Minimum Capital Levels to be Classified as: Actual Adequately Capitalized Well Capitalized Basel III Compliant (amounts in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of March 31, 2021: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,021,018 8.774 % $ 523,659 4.500 % N/A N/A $ 814,581 7.000 % Customers Bank $ 1,365,443 11.745 % $ 523,182 4.500 % $ 755,708 6.500 % $ 813,839 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,238,489 10.643 % $ 698,212 6.000 % N/A N/A $ 989,134 8.500 % Customers Bank $ 1,365,443 11.745 % $ 697,576 6.000 % $ 930,102 8.000 % $ 988,233 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,447,285 12.437 % $ 930,949 8.000 % N/A N/A $ 1,221,871 10.500 % Customers Bank $ 1,523,681 13.106 % $ 930,102 8.000 % $ 1,162,627 10.000 % $ 1,220,758 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,238,489 8.478 % $ 584,359 4.000 % N/A N/A $ 584,359 4.000 % Customers Bank $ 1,365,443 9.352 % $ 584,025 4.000 % $ 730,031 5.000 % $ 584,025 4.000 % As of December 31, 2020: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 954,839 8.079 % $ 531,844 4.500 % N/A N/A $ 827,312 7.000 % Customers Bank $ 1,254,082 10.615 % $ 531,639 4.500 % $ 767,923 6.500 % $ 826,994 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,172,310 9.919 % $ 709,125 6.000 % N/A N/A $ 1,004,594 8.500 % Customers Bank $ 1,254,082 10.615 % $ 708,852 6.000 % $ 945,136 8.000 % $ 1,004,207 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,401,119 11.855 % $ 945,500 8.000 % N/A N/A $ 1,240,969 10.500 % Customers Bank $ 1,424,791 12.060 % $ 945,136 8.000 % $ 1,181,421 10.000 % $ 1,240,492 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,172,310 8.597 % $ 545,485 4.000 % N/A N/A $ 545,485 4.000 % Customers Bank $ 1,254,082 9.208 % $ 544,758 4.000 % $ 680,947 5.000 % $ 544,758 4.000 % The Basel III Capital Rules require that we maintain a 2.500% capital conservation buffer with respect to each of CET1, Tier 1 and total capital to risk-weighted assets, which provides for capital levels that exceed the minimum risk-based capital adequacy requirements. A financial institution with a conservation buffer of less than the required amount is subject to limitations on capital distributions, including dividend payments and stock repurchases, and certain discretionary bonus payments to executive officers.

Disclosures About Fair Value of

Disclosures About Fair Value of Financial Instruments	3 Months Ended
Disclosures About Fair Value of Financial Instruments	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Disclosures About Fair Value of Financial Instruments	DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS Customers uses fair value measurements to record fair value adjustments to certain assets and liabilities and to disclose the fair value of its financial instruments. ASC 825, Financial Instruments , requires disclosure of the estimated fair value of an entity’s assets and liabilities considered to be financial instruments. For Customers, as for most financial institutions, the majority of its assets and liabilities are considered to be financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and a willing seller engaging in an exchange transaction. For fair value disclosure purposes, Customers utilized certain fair value measurement criteria under ASC 820, Fair Value Measurements and Disclosures ("ASC 820"), as explained below. In accordance with ASC 820, the fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for Customers' various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. The fair value guidance provides a consistent definition of fair value, focusing on an exit price in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires the use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. The fair value guidance also establishes a fair value hierarchy and describes the following three levels used to classify fair value measurements. Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2: Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability. Level 3: Prices or valuation techniques that require adjustments to inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The following methods and assumptions were used to estimate the fair values of Customers' financial instruments as of March 31, 2021 and December 31, 2020: Financial Instruments Recorded at Fair Value on a Recurring Basis Investment securities: The fair values of equity securities, AFS debt securities and debt securities reported at fair value based on a fair value option election are determined by obtaining quoted market prices on nationally recognized and foreign securities exchanges (Level 1), quoted prices in markets that are not active (Level 2), matrix pricing (Level 2), which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted market prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted prices, or internally and externally developed models that use unobservable inputs due to limited or no market activity of the instrument (Level 3). These assets are classified as Level 1, 2 or 3 fair values, based upon the lowest level of input that is significant to the fair value measurements. Loans held for sale - Residential mortgage loans (fair value option): Customers generally estimates the fair values of residential mortgage loans held for sale based on commitments on hand from investors within the secondary market for loans with similar characteristics. These assets are classified as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements. Loans receivable - Commercial mortgage warehouse loans (fair value option): The fair value of commercial mortgage warehouse loans is the amount of cash initially advanced to fund the mortgage, plus accrued interest and fees, as specified in the respective agreements. The loan is used by mortgage companies as short-term bridge financing between the funding of the mortgage loans and the finalization of the sale of the loans to an investor. Changes in fair value are not generally expected to be recognized because at inception of the transaction the underlying mortgage loans have already been sold to an approved investor. Additionally, the interest rate is variable, and the transaction is short-term, with an average life of under 30 days from purchase to sale. These assets are classified as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements. Derivatives (assets and liabilities): The fair values of interest rate swaps, interest rate caps and credit derivatives are determined using models that incorporate readily observable market data into a market standard methodology. This methodology nets the discounted future cash receipts and the discounted expected cash payments. The discounted variable cash receipts and payments are based on expectations of future interest rates derived from observable market interest rate curves. In addition, fair value is adjusted for the effect of nonperformance risk by incorporating credit valuation adjustments for Customers and its counterparties. These assets and liabilities are classified as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements. The fair values of the residential mortgage loan commitments are derived from the estimated fair values that can be generated when the underlying mortgage loan is sold in the secondary market. Customers generally uses commitments on hand from third party investors to estimate an exit price and adjusts for the probability of the commitment being exercised based on Customers' internal experience (i.e., pull-through rate). These assets and liabilities are classified as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements. Derivative assets and liabilities are presented in "Other assets" and "Accrued interest payable and other liabilities" on the consolidated balance sheet. The following information should not be interpreted as an estimate of Customers' fair value in its entirety because fair value calculations are only provided for a limited portion of Customers' assets and liabilities. Due to a wide range of valuation techniques and the degree of subjectivity used in making these estimates, comparisons between Customers' disclosures and those of other companies may not be meaningful. Financial Instruments Recorded at Fair Value on a Nonrecurring Basis Collateral-dependent loans: Collateral-dependent loans are those loans that are accounted for under ASC 326 in which the Bank has measured impairment generally based on the fair value of the loan’s collateral or DCF analysis. Fair value is generally determined based upon independent third-party appraisals of the properties that collateralize the loans, DCF based upon the expected proceeds, sales agreements or letters of intent with third parties. These assets are generally classified as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements. Other real estate owned: The fair value of OREO is determined by using appraisals, which may be discounted based on management’s review and changes in market conditions or sales agreements with third parties. All appraisals must be performed in accordance with the Uniform Standards of Professional Appraisal Practice. Appraisals are certified to the Bank and performed by appraisers on the Bank’s approved list of appraisers. Evaluations are completed by a person independent of management. The content of the appraisal depends on the complexity of the property. Appraisals are completed on a “retail value” and an “as is value”. These assets are classified as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements. The estimated fair values of Customers' financial instruments at March 31, 2021 and December 31, 2020 were as follows. Fair Value Measurements at March 31, 2021 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 515,364 $ 515,364 $ 515,364 $ — $ — Debt securities, available for sale 1,437,077 1,437,077 — 1,437,077 — Equity securities 4,827 4,827 4,827 — — Loans held for sale 46,106 46,106 — 45,463 643 Total loans and leases receivable, net of allowance for credit losses on loans and leases 15,993,464 16,487,438 — 3,407,622 13,079,816 FHLB, Federal Reserve Bank and other restricted stock 69,420 69,420 — 69,420 — Derivatives 36,502 36,502 — 36,306 196 Liabilities: Deposits $ 12,472,440 $ 12,473,798 $ 11,806,559 $ 667,239 $ — FRB PPP Liquidity Facility 3,284,156 3,284,156 — 3,284,156 — Federal funds purchased 365,000 365,000 365,000 — — FHLB advances 850,000 850,787 — 850,787 — Other borrowings 124,138 135,571 — 135,571 — Subordinated debt 181,464 197,080 — 197,080 — Derivatives 37,536 37,536 — 37,536 — Fair Value Measurements at December 31, 2020 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 693,354 $ 693,354 $ 693,354 $ — $ — Debt securities, available for sale 1,206,431 1,206,431 — 1,206,431 — Equity securities 3,854 3,854 3,854 — — Loans held for sale 79,086 79,086 — 78,443 643 Total loans and leases receivable, net of allowance for credit losses on loans and leases 15,608,989 16,222,202 — 3,616,432 12,605,770 FHLB, Federal Reserve Bank and other restricted stock 71,368 71,368 — 71,368 — Derivatives 54,223 54,223 — 54,023 200 Liabilities: Deposits $ 11,309,929 $ 11,312,494 $ 10,657,998 $ 654,496 $ — FRB PPP Liquidity Facility 4,415,016 4,415,016 — 4,415,016 — Federal funds purchased 250,000 250,000 250,000 — — FHLB advances 850,000 852,442 — 852,442 — Other borrowings 124,037 129,120 — 129,120 — Subordinated debt 181,394 193,119 — 193,119 — Derivatives 98,164 98,164 — 98,164 — For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at March 31, 2021 and December 31, 2020 were as follows: March 31, 2021 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 386,993 $ — $ 386,993 U.S. government agencies securities — 20,053 — 20,053 Agency-guaranteed mortgage-backed securities — 37,634 — 37,634 Agency-guaranteed collateralized mortgage obligations — 211,104 — 211,104 Commercial mortgage-backed securities — 13,059 — 13,059 Collateralized loan obligations — 163,094 — 163,094 Corporate notes — 257,924 — 257,924 Private label collateralized mortgage obligations — 328,689 — 328,689 State and political subdivision debt securities — 18,527 — 18,527 Equity securities 4,827 — — 4,827 Derivatives — 36,306 196 36,502 Loans held for sale – fair value option — 1,205 — 1,205 Loans receivable, mortgage warehouse – fair value option — 3,407,622 — 3,407,622 Total assets – recurring fair value measurements $ 4,827 $ 4,882,210 $ 196 $ 4,887,233 Liabilities Derivatives $ — $ 37,536 $ — $ 37,536 Measured at Fair Value on a Nonrecurring Basis: Assets Loans held for sale $ — $ 44,258 $ — $ 44,258 Collateral-dependent loans — — 7,331 7,331 Other real estate owned — — 35 35 Total assets – nonrecurring fair value measurements $ — $ 44,258 $ 7,366 $ 51,624 December 31, 2020 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 377,145 $ — $ 377,145 U.S. government agencies securities — 20,034 — 20,034 Agency-guaranteed mortgage–backed securities — 63,091 — 63,091 Agency-guaranteed collateralized mortgage obligations — 161,767 — 161,767 Collateralized loan obligations — 32,367 — 32,367 Corporate notes — 396,744 — 396,744 Private label collateralized mortgage obligations — 136,992 — 136,992 State and political subdivision debt securities — 18,291 — 18,291 Equity securities 3,854 — — 3,854 Derivatives — 54,023 200 54,223 Loans held for sale – fair value option — 5,509 — 5,509 Loans receivable, mortgage warehouse – fair value option — 3,616,432 — 3,616,432 Total assets – recurring fair value measurements $ 3,854 $ 4,882,395 $ 200 $ 4,886,449 Liabilities Derivatives $ — $ 98,164 $ — $ 98,164 Measured at Fair Value on a Nonrecurring Basis: Assets Loans held for sale $ — $ 55,683 $ — $ 55,683 Collateral-dependent loans — 17,251 3,867 21,118 Other real estate owned — — 35 35 Total assets – nonrecurring fair value measurements $ — $ 72,934 $ 3,902 $ 76,836 The changes in residential mortgage loan commitments (Level 3 assets) measured at fair value on a recurring basis for the three months ended March 31, 2021 and 2020 are summarized in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 13 - DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments Three Months Ended March 31, (amounts in thousands) 2021 2020 Balance at December 31 $ 200 $ 79 Issuances 196 215 Settlements (200) (79) Balance at March 31 $ 196 $ 215 There were no transfers between levels during the three months ended March 31, 2021 and 2020. The following table summarizes financial assets and financial liabilities measured at fair value as of March 31, 2021 and December 31, 2020 on a recurring and nonrecurring basis for which Customers utilized Level 3 inputs to measure fair value. The unobservable Level 3 inputs noted below contain a level of uncertainty that may differ from what is realized in an immediate settlement of the assets. Therefore, Customers may realize a value higher or lower than the current estimated fair value of the assets. Quantitative Information about Level 3 Fair Value Measurements (amounts in thousands) Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (4) March 31, 2021 Collateral-dependent loans – real estate $ 6,778 Collateral appraisal (1) Liquidation expenses (2) 8% - 20% (12%) Collateral-dependent loans – commercial and industrial 553 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 7% - 8% (8%) 40% - 40% (40%) Residential mortgage loan commitments 196 Adjusted market bid Pull-through rate 81% - 81% (81%) (1) Obtained from approved independent appraisers. Appraisals are current and in compliance with credit policy. Customers does not generally discount appraisals. (2) Appraisals are adjusted by management for liquidation expenses. The range and weighted average of liquidation expense adjustments are presented as a percentage of the appraisal. (3) Business asset valuation obtained from independent party. (4) Business asset valuations may be adjusted by management for qualitative factors including economic conditions and the condition of the business assets. The range and weighted average of the business asset adjustments are presented as a percent of the business asset valuation. Quantitative Information about Level 3 Fair Value Measurements (amounts in thousands) Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (4) December 31, 2020 Collateral-dependent loans – real estate $ 2,928 Collateral appraisal (1) Liquidation expenses (2) 8% - 8% (8%) Collateral-dependent loans – commercial and industrial 939 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 7% - 8% (8%) 60% - 60% (60%) Other real estate owned 35 Collateral appraisal (1) Liquidation expenses (2) 8% - 9% (9%) Residential mortgage loan commitments 200 Adjusted market bid Pull-through rate 78% - 78% (78%) (1) Obtained from approved independent appraisers. Appraisals are current and in compliance with credit policy. Customers does not generally discount appraisals. (2) Appraisals are adjusted by management for liquidation expenses. The range and weighted average of liquidation expense adjustments are presented as a percentage of the appraisal. (3) Business asset valuation obtained from independent party. (4) Business asset valuations may be adjusted by management for qualitative factors including economic conditions and the condition of the business assets. The range and weighted average of the business asset adjustments are presented as a percent of the business asset valuation.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	3 Months Ended
Derivative Instruments and Hedging Activities	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Risk Management Objectives of Using Derivatives Customers is exposed to certain risks arising from both its business operations and economic conditions. Customers manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources, and durations of its assets and liabilities. Specifically, Customers enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates. Customers’ derivative financial instruments are used to manage differences in the amount, timing, and duration of Customers’ known or expected cash receipts and its known or expected cash payments principally related to certain borrowings and deposits. Customers also has interest-rate derivatives resulting from a service provided to certain qualifying customers, and therefore, they are not used to manage Customers’ interest-rate risk in assets or liabilities. Customers manages a matched book with respect to its derivative instruments used in this customer service in order to minimize its net risk exposure resulting from such transactions. Cash Flow Hedges of Interest-Rate Risk Customers’ objectives in using interest-rate derivatives are to add stability to interest expense and to manage exposure to interest rate movements. To accomplish this objective, Customers primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for Customers making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The changes in the fair value of derivatives designated and qualifying as cash flow hedges are recorded in accumulated other comprehensive income (loss) and subsequently reclassified into earnings in the period that the hedged item affects earnings. To date, such derivatives were used to hedge the variable cash flows associated with the forecasted issuances of debt and a certain variable-rate deposit relationship. At December 31, 2020, Customers had five outstanding interest rate derivatives with notional amounts totaling $1.1 billion that were designated as cash flow hedges of interest rate risk. Customers discontinues cash flow hedge accounting if it is probable the forecasted hedged transactions will not occur in the initially identified time period. At such time, the associated gains and losses deferred in accumulated other comprehensive income (loss) are reclassified immediately into earnings and any subsequent changes in the fair value of such derivatives are recognized directly in earnings. In March 2021, Customers terminated four interest rate derivatives with notional amounts totaling $850 million that were designated as cash flow hedges of interest-rate risk associated with 3-month FHLB advances, and reclassified $25.9 million of the realized losses and accrued interest from AOCI to current earnings because the hedged forecasted transactions were determined to be no longer probable of occurring. At March 31, 2021, Customers had one outstanding interest rate derivative with notional amount of $225.0 million that was designated as cash flow hedge of interest rate risk. Customers is hedging its exposure to the variability in future cash flows for a variable-rate deposit relationship over a maximum period of 24 months (excluding forecasted transactions related to the payment of variable interest on existing financial instruments). The outstanding cash flow hedge at March 31, 2021 expires in June 2021. Amounts reported in accumulated other comprehensive income (loss) related to derivatives will be reclassified to interest expense as interest payments are made on Customers' variable-rate debt and a variable-rate deposit relationship. Customers expects to reclassify $1.1 million of losses from accumulated other comprehensive income (loss) to interest expense during the next 12 months. Fair Value Hedges of Benchmark Interest-Rate Risk Customers is exposed to changes in the fair value of certain of its fixed rate AFS debt securities due to changes in the benchmark interest rate. Customers uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rate such as the Fed Funds Effective Swap Rate. Interest rate swaps designated as fair value hedges involve the payment of fixed-rate amounts to a counterparty in exchange for Customers receiving variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in interest income. At March 31, 2021, Customers had 17 outstanding interest rate derivatives with notional amounts totaling $85.5 million that were designated as fair value hedges of certain available for sale debt securities. In March 2021, Customers terminated seven interest rate derivatives with notional amounts totaling $186.8 million that were designated as fair value hedges together with the sale of hedged available for sale debt securities. At December 31, 2020, Customers had 24 outstanding interest rate derivatives with notional amounts totaling $272.3 million designated as fair value hedges. As of March 31, 2021, the following amounts were recorded on the consolidated balance sheet related to cumulative basis adjustments for fair value hedges. Amortized Cost Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items (amounts in thousands) March 31, December 31, March 31, December 31, 2021 2020 2021 2020 Available for sale debt securities $ 85,500 $ 272,159 $ 976 $ 741 Derivatives Not Designated as Hedging Instruments Customers executes interest rate swaps (typically the loan customers will swap a floating-rate loan for a fixed-rate loan) and interest rate caps with commercial banking customers to facilitate their respective risk management strategies. The customer interest rate swaps and interest rate caps are simultaneously offset by interest rate swaps and interest rate caps that Customers executes with a third party in order to minimize interest-rate risk exposure resulting from such transactions. As the interest rate swaps and interest rate caps associated with this program do not meet the hedge accounting requirements, changes in the fair value of both the customer swaps and caps and the offsetting third-party market swaps and caps are recognized directly in earnings. At March 31, 2021, Customers had 161 interest rate swaps with an aggregate notional amount of $1.5 billion and twelve interest rate caps with an aggregated notional amount of $206.1 million related to this program. At December 31, 2020, Customers had 155 interest rate swaps with an aggregate notional amount of $1.4 billion and twelve interest rate caps with an aggregate notional amount of $204.9 million related to this program. Customers enters into residential mortgage loan commitments in connection with its consumer mortgage banking activities to fund mortgage loans at specified rates and times in the future. These commitments are short-term in nature and generally expire in 30 to 60 days. The residential mortgage loan commitments that relate to the origination of mortgage loans that will be held for sale are considered derivative instruments under applicable accounting guidance and are reported at fair value, with changes in fair value recorded directly in earnings. At March 31, 2021 and December 31, 2020, Customers had an outstanding notional balance of residential mortgage loan commitments of $8.8 million and $11.9 million, respectively. Customers has also purchased and sold credit derivatives to either hedge or participate in the performance risk associated with some of its counterparties. These derivatives are not designated as hedging instruments and are reported at fair value, with changes in fair value reported directly in earnings. At March 31, 2021 and December 31, 2020, Customers had outstanding notional balances of credit derivatives of $173.6 million and $177.2 million, respectively. Fair Value of Derivative Instruments on the Balance Sheet The following tables present the fair value of Customers' derivative financial instruments as well as their presentation on the balance sheet as of March 31, 2021 and December 31, 2020. March 31, 2021 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ — Other liabilities $ 1,034 Total $ — $ 1,034 Derivatives designated as fair value hedges: Interest rate swaps Other assets $ 976 Other liabilities $ — Total $ 976 $ — Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 34,962 Other liabilities $ 36,154 Interest rate caps Other assets 166 Other liabilities 166 Credit contracts Other assets 202 Other liabilities 182 Residential mortgage loan commitments Other assets 196 Other liabilities — Total $ 35,526 $ 36,502 December 31, 2020 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ 196 Other liabilities $ 40,765 Total $ 196 $ 40,765 Derivatives designated as fair value hedges: Interest rate swaps Other assets $ — Other liabilities $ 741 Total $ — $ 741 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 53,455 Other liabilities $ 56,209 Interest rate caps Other assets 46 Other liabilities 46 Credit contracts Other assets 326 Other liabilities 403 Residential mortgage loan commitments Other assets 200 Other liabilities — Total $ 54,027 $ 56,658 Effect of Derivative Instruments on Net Income The following tables present amounts included in the consolidated statements of income related to derivatives designated as fair value hedges and derivatives not designated as hedges for the three months ended March 31, 2021 and 2020. Amount of Income (Loss) Recognized in Earnings Three Months Ended March 31, (amounts in thousands) Income Statement Location 2021 2020 Derivatives designated as fair value hedges: Recognized on interest rate swaps Net interest income $ 4,907 $ — Recognized on hedged available for sale debt securities Net interest income (4,907) — Total $ — $ — Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 2,399 $ (1,015) Interest rate caps Other non-interest income — — Credit contracts Other non-interest income 137 (132) Residential mortgage loan commitments Mortgage banking income (4) 137 Total $ 2,532 $ (1,010) Effect of Derivative Instruments on Comprehensive Income The following table presents the effect of Customers' derivative financial instruments on comprehensive income for the three months ended March 31, 2021 and 2020. Amount of Gain (Loss) Recognized in OCI on Derivatives (1) Location of Gain (Loss) Reclassified from Accumulated OCI into Income Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Three Months Ended March 31, Three Months Ended (amounts in thousands) 2021 2020 2021 2020 Derivatives in cash flow hedging relationships: Interest rate swaps $ 9,113 $ (20,346) Interest expense $ (1,459) $ (1,478) — — Other non-interest income (24,467) — Total $ 9,113 $ (20,346) $ (25,926) $ (1,478) (1) Amounts presented are net of taxes. See NOTE 5 - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) for the total effect on other comprehensive income (loss) from derivatives designated as cash flow hedges for the periods presented. Credit-risk-related Contingent Features By entering into derivative contracts, Customers is exposed to credit risk. The credit risk associated with derivatives executed with customers is the same as that involved in extending the related loans and is subject to the same standard credit policies. To mitigate the credit-risk exposure to major derivative dealer counterparties, Customers only enters into agreements with those counterparties that maintain credit ratings of high quality or with central clearing parties. Agreements with major derivative dealer counterparties contain provisions whereby default on any of Customers' indebtedness would be considered a default on its derivative obligations. Customers also has entered into agreements that contain provisions under which the counterparty could require Customers to settle its obligations if Customers fails to maintain its status as a well/adequately capitalized institution. As of March 31, 2021, the fair value of derivatives in a net liability position (which includes accrued interest but excludes any adjustment for nonperformance-risk) related to these agreements was $36.4 million. In addition, Customers, which has collateral posting thresholds with certain of these counterparties, had posted $35.0 million of cash as collateral at March 31, 2021. Customers records cash posted as collateral with these counterparties, except with a central clearing party, as a reduction in the outstanding balance of cash and cash equivalents and an increase in the balance of other assets. Disclosures about Offsetting Assets and Liabilities The following tables present derivative instruments that are subject to enforceable master netting arrangements. Customers' interest rate swaps and interest rate caps with institutional counterparties are subject to master netting arrangements and are included in the table below. Interest rate swaps and interest rate caps with commercial banking customers and residential mortgage loan commitments are not subject to master netting arrangements and are excluded from the table below. Customers has not made a policy election to offset its derivative positions. Gross Amounts Recognized on the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Financial Instruments Cash Collateral Received/(Posted) Net Amount March 31, 2021 Interest rate derivative assets with institutional counterparties $ 98 $ — $ — $ 98 Interest rate derivative liabilities with institutional counterparties $ 35,017 $ — $ (35,017) $ — Gross Amounts Recognized on the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2020 Interest rate derivative assets with institutional counterparties $ 199 $ — $ — $ 199 Interest rate derivative liabilities with institutional counterparties $ 97,641 $ — $ (97,641) $ —

Loss Contingencies

Loss Contingencies	3 Months Ended
Loss Contingencies	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Loss Contingencies	LOSS CONTINGENCIES Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are any such matters that will have a material effect on the consolidated financial statements that are not currently accrued for. However, in light of the uncertainties inherent in these matters, it is possible that the ultimate resolution may have a material adverse effect on Customers’ results of operations for a particular period, and future changes in circumstances or additional information could result in accruals or resolution in excess of established accruals, which could adversely affect Customers’ results of operations, potentially materially. Lifestyle Healthcare Group, Inc. Matter On January 9, 2017, Lifestyle Healthcare Group, Inc., et al (“Plaintiffs”) filed a Complaint captioned Lifestyle Healthcare Group, Inc.; Fred Rappaport; Victoria Rappaport; Lifestyle Management Group, LLC Trading as Lifestyle Real Estate I, LP; Lifestyle Real Estate I GP, LLC; Daniel Muck; Lifestyle Management Group, LLC; Lifestyle Management Group, LLC Trading as Lifestyle I, LP D/B/A Lifestyle Medspa, Plaintiffs (“Lifestyle Parties”) v. Customers Bank, Robert White; Saldutti Law, LLC a/k/a Saldutti Law Group; Robert L. Saldutti, Esquire; and Michael Fuoco, Civil Action No. 01206, in the First Judicial District of Pennsylvania, Court of Common Pleas of Philadelphia . In this Complaint, the Plaintiffs generally allege wrongful use of civil proceedings and abuse of process in connection with a case filed and later dismissed in federal court, titled, Customers Bank v. Fred Rappaport, et al., U.S.D.C.E.D. Pa., No. 15-6145. On January 30, 2017, Customers Bank filed Preliminary Objections to the Complaint seeking dismissal of Plaintiff’s claims against Customers Bank and Robert White, named as co-defendants. In response to the Preliminary Objections, Lifestyle filed an Amended Complaint against Customers Bank and Robert White. Customers Bank filed Preliminary Objections to the Second Amended Complaint seeking dismissal of Plaintiff's claim against Customers Bank and Robert White, named as co-defendants. The Court dismissed certain counts and determined to allow certain other counts to proceed. On September 17, 2020, a Stipulation of Dismissal with Prejudice was filed with the Court as a result of the voluntary resolution of the matter by and between Plaintiffs and defendants, Customers Bank, Robert White and Michael Fuoco only. United States Department of Education Matter In third quarter 2018, Customers received a Final Program Review Determination ("FPRD") letter dated September 5, 2018 from the ED regarding a focused program review of Higher One's/Customers Bank's administration, as a third party servicer, of the programs authorized pursuant to Title IV of the Higher Education Act of 1965. The ED program review covered the award years beginning in 2013 through the FPRD issuance date, including the time period when Higher One was acting as the third party servicer prior to Customers' acquisition of the Disbursement business on June 15, 2016. The FPRD determined that, with respect to students enrolled at specified partner institutions, Higher One/Customers did not provide convenient fee-free access to ATMs or bank branch offices in such locations as required by the ED’s cash management regulations. Those regulations, which were in effect during the period covered by the program review and were revised during that period, seek, among other purposes, to ensure that students can make fee-free cash withdrawals. The FPRD determined that students incurred prohibited costs in accessing Title IV credit balance funds, and the FPRD classifies those costs as financial liabilities of Customers. The FPRD also requires Customers to take prospective action to increase ATM access for students at certain of its partner institutions. Customers disagreed with the FPRD and appealed the asserted financial liabilities of $6.5 million, and a request for review has been submitted to trigger an administrative process before the ED’s Office of Hearing and Appeals. On March 26, 2020, the ED and Customers filed a Joint Motion to Dismiss with Prejudice (the "Joint Motion") with the United States Department of Education. The Joint Motion states that the ED and Customers reached an agreement that resolves the liabilities at issue in the appeal. The Joint Motion was granted on April 27, 2020. As part of the settlement, the liabilities assessed in the FPRD were reduced to $3.0 million (the "settlement amount"). Customers had previously recorded a liability in the amount of $1.0 million during third quarter 2019 and increased its liability by an additional $1.0 million in first quarter 2020. The remaining $1.0 million is expected to be funded from funds in an escrow account set-up at the time of Customers' acquisition of the Disbursement business from Higher One in 2016. Bureau of the Fiscal Service Notice of Direct Debit (U.S. Treasury Check Reclamation) On June 21, 2019, Customers received a Notice of Direct Debit (U.S. Treasury Check Reclamation) from the Bureau of the Fiscal Service (“Reclamation Notice”). The Reclamation Notice represented a demand to Customers for the return of funds on a U.S. Treasury check for approximately $5.4 million. Customers filed a written protest pursuant to Code of Federal Regulations, Title 31, Chapter II, Part 240, which resulted in a suspension of the direct debit by the Bureau of the Fiscal Service. On January 31, 2020, Customers received an Abandonment Notice from the Bureau of Fiscal Service instructing Customers to disregard the Notice of Direct Debit as the Bureau of Fiscal Service would not be seeking reclamation of these funds. Specialty’s Café Bakery, Inc. Matter On May 27, 2020, the appointed Chapter 7 Trustee for Specialty’s Café Bakery, Inc. (“Debtor”) filed a voluntary petition for relief under Chapter 7 of the Bankruptcy Code in the United Stated Bankruptcy Court for the Central District of California. On October 28, 2020, the Trustee, as plaintiff, filed her amended adversary complaint (“Adversary Complaint”) against Customers Bank and the SBA seeking to avoid and recover for the benefit of the Debtor’s estate and its creditors the payment made by the Debtor to Customers Bank in the amount of $8.1 million in satisfaction of a Payroll Protection Program loan made by Customers Bank to the Debtor (the “PPP Loan Payment”). The Trustee seeks to avoid and recover the entire PPP Loan Payment from the Bank under the authority provided in 11 U.S.C. §547 and §550, which together permit a trustee of a bankruptcy debtor to avoid and recover, for a more equitable distribution among all creditors, certain transfers made within ninety (90) days before the filing of the bankruptcy petition. The Bank intends to vigorously defend itself against the Trustee’s Adversary Complaint and is currently unable to reasonably determine the likelihood of loss nor estimate a possible range of loss.

Significant Accounting Polici_2

Significant Accounting Policies and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The interim unaudited consolidated financial statements have been prepared in conformity with U.S. GAAP and pursuant to the rules and regulations of the SEC. These interim unaudited consolidated financial statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present a fair statement of the financial position and the results of operations and cash flows of Customers Bancorp and subsidiaries for the interim periods presented. Certain information and footnote disclosures normally included in the annual consolidated financial statements have been omitted from these interim unaudited consolidated financial statements as permitted by SEC rules and regulations. The December 31, 2020 consolidated balance sheet presented in this report has been derived from Customers Bancorp’s audited 2020 consolidated financial statements. Management believes that the disclosures are adequate to present fairly the consolidated financial statements as of the dates and for the periods presented. These interim unaudited consolidated financial statements should be read in conjunction with the 2020 consolidated financial statements of Customers Bancorp and subsidiaries included in Customers' Annual Report on Form 10-K for the year ended December 31, 2020 filed with the SEC on March 1, 2021 (the "2020 Form 10-K"). The 2020 Form 10-K describes Customers Bancorp’s significant accounting policies, which include its policies on Principles of Consolidation; Cash and Cash Equivalents and Statements of Cash Flows; Restrictions on Cash and Amounts due from Banks; Business Combinations; Investment Securities; Loan Accounting Framework; Loans Held for Sale and Loans at Fair Value; Loans Receivable - Mortgage Warehouse, at Fair Value; Loans Receivable, PPP; Loans and Leases Receivable; PCD Loans and Leases; ACL; Goodwill and Other Intangible Assets; FHLB, Federal Reserve Bank, and Other Restricted Stock; OREO; BOLI; Bank Premises and Equipment; Lessor and Lessee Operating Leases; Treasury Stock; Income Taxes; Share-Based Compensation; Transfer of Financial Assets; Derivative Instruments and Hedging; Comprehensive Income (Loss); EPS; and Loss Contingencies. There have been no material changes to Customers Bancorp's significant accounting policies noted above for the three months ended March 31, 2021.
Recently Issued Accounting Standards	Recently Issued Accounting Standards Presented below are recently issued accounting standards that Customers has adopted. Standard Summary of Guidance Effects on Financial Statements ASU 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting Issued March 2020 • Provides optional guidance for a limited period of time to ease the potential burden in accounting for (or derecognizing the effects of) reference rate reform on financial reporting. Specifically, the amendments provide optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. These relate only to those contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. • Effective as of March 12, 2020 and can be adopted anytime during the period of January 1, 2020 through December 31, 2022. • Customers adopted this guidance during adoption period for certain optional expedients. • The adoption of this guidance did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. • As of March 31, 2021, Customers has not yet elected to apply optional expedients for certain contract modifications. However, we plan to elect additional optional expedients in the future. ASU 2021-01, Reference Rate Reform (Topic 848) - Scope Issued January 2021 • Clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition, including derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. • Effective as of March 12, 2020 and can be adopted anytime during the period of January 1, 2020 through December 31, 2022. • Customers adopted this guidance during adoption period for certain optional expedients. • The adoption of this guidance did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. • As of March 31, 2021, Customers has not yet elected to apply optional expedients for certain contract modifications. We plan to elect additional optional expedients in the future.
Fair Value Measurement	Customers uses fair value measurements to record fair value adjustments to certain assets and liabilities and to disclose the fair value of its financial instruments. ASC 825, Financial Instruments , requires disclosure of the estimated fair value of an entity’s assets and liabilities considered to be financial instruments. For Customers, as for most financial institutions, the majority of its assets and liabilities are considered to be financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and a willing seller engaging in an exchange transaction. For fair value disclosure purposes, Customers utilized certain fair value measurement criteria under ASC 820, Fair Value Measurements and Disclosures ("ASC 820"), as explained below. In accordance with ASC 820, the fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for Customers' various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. The fair value guidance provides a consistent definition of fair value, focusing on an exit price in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires the use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. The fair value guidance also establishes a fair value hierarchy and describes the following three levels used to classify fair value measurements. Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2: Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability. Level 3: Prices or valuation techniques that require adjustments to inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
Derivatives	Risk Management Objectives of Using Derivatives Customers is exposed to certain risks arising from both its business operations and economic conditions. Customers manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources, and durations of its assets and liabilities. Specifically, Customers enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates. Customers’ derivative financial instruments are used to manage differences in the amount, timing, and duration of Customers’ known or expected cash receipts and its known or expected cash payments principally related to certain borrowings and deposits. Customers also has interest-rate derivatives resulting from a service provided to certain qualifying customers, and therefore, they are not used to manage Customers’ interest-rate risk in assets or liabilities. Customers manages a matched book with respect to its derivative instruments used in this customer service in order to minimize its net risk exposure resulting from such transactions. Cash Flow Hedges of Interest-Rate Risk Customers’ objectives in using interest-rate derivatives are to add stability to interest expense and to manage exposure to interest rate movements. To accomplish this objective, Customers primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for Customers making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The changes in the fair value of derivatives designated and qualifying as cash flow hedges are recorded in accumulated other comprehensive income (loss) and subsequently reclassified into earnings in the period that the hedged item affects earnings. To date, such derivatives were used to hedge the variable cash flows associated with the forecasted issuances of debt and a certain variable-rate deposit relationship. At December 31, 2020, Customers had five outstanding interest rate derivatives with notional amounts totaling $1.1 billion that were designated as cash flow hedges of interest rate risk. Customers discontinues cash flow hedge accounting if it is probable the forecasted hedged transactions will not occur in the initially identified time period. At such time, the associated gains and losses deferred in accumulated other comprehensive income (loss) are reclassified immediately into earnings and any subsequent changes in the fair value of such derivatives are recognized directly in earnings. In March 2021, Customers terminated four interest rate derivatives with notional amounts totaling $850 million that were designated as cash flow hedges of interest-rate risk associated with 3-month FHLB advances, and reclassified $25.9 million of the realized losses and accrued interest from AOCI to current earnings because the hedged forecasted transactions were determined to be no longer probable of occurring.

Discontinued Operations (Tables

Discontinued Operations (Tables)	3 Months Ended
Discontinued Operations (Tables)	Mar. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations Income Statement and Balance Sheet	The following summarized financial information related to BMT has been segregated from continuing operations and reported as discontinued operations for the periods presented. Three Months Ended (amounts in thousands) 2021 2020 Discontinued operations: Non-interest income $ — $ 16,072 Non-interest expense 20,354 22,794 Loss from discontinued operations before income taxes (20,354) (6,722) Income tax expense (benefit) 17,682 (1,368) Net loss from discontinued operations $ (38,036) $ (5,354) The assets and liabilities of discontinued operations on the consolidated balance sheet as of December 31, 2020 were as follows: (amounts in thousands) December 31, Carrying amounts of assets included as part of discontinued operations: Cash and cash equivalents $ 2,989 Premises and equipment, net 401 Goodwill and other intangibles 10,329 Other assets 48,336 Total assets of discontinued operations $ 62,055 Carrying amounts of liabilities included as part of discontinued operations: Borrowings from Customers Bank $ 21,000 Accrued interest payable and other liabilities 18,704 Total liabilities of discontinued operations $ 39,704

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	3 Months Ended
Earnings (Loss) Per Share (Tables)	Mar. 31, 2021
Earnings Per Share [Abstract]
Components of Earnings (Loss) Per Share	The following are the components and results of Customers' earnings (loss) per common share calculations for the periods presented. Three Months Ended (amounts in thousands, except share and per share data) 2021 2020 Net income from continuing operations available to common shareholders $ 71,240 $ 4,839 Net loss from discontinued operations (38,036) (5,354) Net income available to common shareholders $ 33,204 $ (515) Weighted-average number of common shares outstanding – basic 31,883,946 31,391,151 Share-based compensation plans 957,765 — Weighted-average number of common shares – diluted 32,841,711 31,391,151 Basic earnings (loss) per common share from continuing operations $ 2.23 $ 0.15 Basic earnings (loss) per common share from discontinued operations (1.19) (0.17) Basic earnings (loss) per common share 1.04 (0.02) Diluted earnings (loss) per common share from continuing operations $ 2.17 $ 0.15 Diluted earnings (loss) per common share from discontinued operations (1.16) (0.17) Diluted earnings (loss) per common share 1.01 (0.02)
Anti-dilutive Securities Excluded from Computation of Earnings Per Share	The following are securities that could potentially dilute basic earnings per common share in future periods that were not included in the computation of diluted earnings per common share because either the performance conditions for certain of the share-based compensation awards have not been met or to do so would have been anti-dilutive for the periods presented. Three Months Ended 2021 2020 Share-based compensation awards 277,725 6,718,131

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Loss) By Component (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss)	The following tables present the changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2021 and 2020. Amounts in parentheses indicate reductions to AOCI. Three Months Ended March 31, 2021 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - December 31, 2020 $ 23,312 $ (29,076) $ (5,764) Unrealized gains (losses) arising during period, before tax 400 12,315 12,715 Income tax effect (104) (3,202) (3,306) Other comprehensive income (loss) before reclassifications 296 9,113 9,409 Reclassification adjustments for (gains) losses included in net income, before tax (23,566) 25,926 2,360 Income tax effect 6,127 (6,741) (614) Amounts reclassified from accumulated other comprehensive income (loss) to net income (17,439) 19,185 1,746 Net current-period other comprehensive income (loss) (17,143) 28,298 11,155 Balance - March 31, 2021 $ 6,169 $ (778) $ 5,391 Three Months Ended March 31, 2020 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - December 31, 2019 $ 14,287 $ (15,537) $ (1,250) Unrealized gains (losses) arising during period, before tax (9,098) (27,697) (36,795) Income tax effect 2,366 7,351 9,717 Other comprehensive income (loss) before reclassifications (6,732) (20,346) (27,078) Reclassification adjustments for losses (gains) included in net income, before tax (3,974) 1,478 (2,496) Income tax effect 1,033 (384) 649 Amounts reclassified from accumulated other comprehensive income (loss) to net income (2,941) 1,094 (1,847) Net current-period other comprehensive income (loss) (9,673) (19,252) (28,925) Balance - March 31, 2020 $ 4,614 $ (34,789) $ (30,175) (1) Reclassification amounts for AFS debt securities are reported as gain or loss on sale of investment securities on the consolidated statements of income. (2) Reclassification amounts for cash flow hedges are reported as interest expense for the applicable hedged items or loss on cash flow hedge derivative terminations on the consolidated statements of income.

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
Investment Securities (Tables)	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Approximate Fair Value of Investment Securities	The amortized cost and fair value of investment securities as of March 31, 2021 and December 31, 2020 are summarized in the tables below: March 31, 2021 (1) (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 381,525 $ 5,717 $ (249) $ 386,993 U.S. government agencies securities 20,000 53 — 20,053 Agency-guaranteed mortgage-backed securities 37,933 9 (308) 37,634 Agency-guaranteed collateralized mortgage obligations 211,226 365 (487) 211,104 Collateralized loan obligations 162,998 139 (43) 163,094 Commercial mortgage-backed securities 13,059 — — 13,059 Corporate notes (2) 255,126 3,422 (624) 257,924 Private label collateralized mortgage obligations 329,367 1,277 (1,955) 328,689 State and political subdivision debt securities (3) 18,481 46 — 18,527 Available for sale debt securities $ 1,429,715 $ 11,028 $ (3,666) 1,437,077 Equity securities (4) 4,827 Total investment securities, at fair value $ 1,441,904 December 31, 2020 (1) (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 372,640 $ 4,515 $ (10) $ 377,145 U.S. government agencies securities 20,000 34 — 20,034 Agency-guaranteed mortgage-backed securities 61,178 1,913 — 63,091 Agency-guaranteed collateralized mortgage obligations 160,950 916 (99) 161,767 Collateralized loan obligations 32,367 — — 32,367 Corporate notes (2) 372,764 24,144 (164) 396,744 Private label collateralized mortgage obligations 136,943 423 (374) 136,992 State and political subdivision debt securities (3) 17,346 945 — 18,291 Available for sale debt securities $ 1,174,188 $ 32,890 $ (647) 1,206,431 Equity securities (4) 3,854 Total investment securities, at fair value $ 1,210,285 (1) Accrued interest on AFS debt securities totaled $4.3 million and $4.2 million at March 31, 2021 and December 31, 2020, respectively, and is included in accrued interest receivable on the consolidated balance sheet. (2) Includes corporate securities issued by domestic bank holding companies. (3) Includes both taxable and non-taxable municipal securities. (4) Includes equity securities issued by a foreign entity.
Summary of Available-for-Sale Debt Securities by Stated Maturity	The following table shows debt securities by stated maturity. Debt securities backed by mortgages and other assets have expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and, therefore, these debt securities are classified separately with no specific maturity date: March 31, 2021 (amounts in thousands) Amortized Fair Due in one year or less $ — $ — Due after one year through five years 140,681 141,641 Due after five years through ten years 142,991 144,893 Due after ten years 9,935 9,970 Asset-backed securities 381,525 386,993 Collateralized loan obligations 162,998 163,094 Commercial mortgage-backed securities 13,059 13,059 Agency-guaranteed mortgage-backed securities 37,933 37,634 Private label collateralized mortgage obligations 329,367 328,689 Agency-guaranteed collateralized mortgage obligations 211,226 211,104 Total debt securities $ 1,429,715 $ 1,437,077
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value	Gross unrealized losses and fair value of Customers' AFS debt securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2021 were as follows: March 31, 2021 Less Than 12 Months 12 Months or More Total (amounts in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale debt securities: Asset-backed securities $ 90,064 $ (249) $ — $ — $ 90,064 $ (249) Agency-guaranteed mortgage-backed securities 10,377 (308) — — 10,377 (308) Agency-guaranteed collateralized mortgage obligations 55,825 (487) — — 55,825 (487) Collateralized loan obligations 55,703 (43) — — 55,703 (43) Corporate notes 48,905 (624) — — 48,905 (624) Private label collateralized mortgage obligations 108,417 (1,955) — — 108,417 (1,955) Total $ 369,291 $ (3,666) $ — $ — $ 369,291 $ (3,666)

Loans Held for Sale (Tables)

Loans Held for Sale (Tables)	3 Months Ended
Loans Held for Sale (Tables)	Mar. 31, 2021
Receivables Held-for-sale [Abstract]
Composition of Loans Held for Sale	The composition of loans held for sale as of March 31, 2021 and December 31, 2020 was as follows: (amounts in thousands) March 31, 2021 December 31, 2020 Commercial loans: Multi-family loans, at lower of cost or fair value $ 19,251 $ — Commercial and industrial loans, at lower of cost or fair value — 55,683 Commercial real estate non-owner occupied loans, at lower of cost or fair value — 17,251 Total commercial loans held for sale 19,251 72,934 Consumer loans: Home equity conversion mortgages, at lower of cost or fair value 643 643 Residential mortgage loans, at fair value 1,205 5,509 Installment loans, at lower of cost or fair value 25,007 — Total consumer loans held for sale 26,855 6,152 Loans held for sale $ 46,106 $ 79,086

Loans and Leases Receivable a_2

Loans and Leases Receivable and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Schedule of Loans and Leases Receivable	The following table presents loans and leases receivable as of March 31, 2021 and December 31, 2020. (amounts in thousands) March 31, 2021 December 31, 2020 Loans and leases receivable, mortgage warehouse, at fair value $ 3,407,622 $ 3,616,432 Loans receivable, PPP 5,178,089 4,561,365 Loans receivable: Commercial: Multi-family 1,640,278 1,761,301 Commercial and industrial (1) 2,220,652 2,289,441 Commercial real estate owner occupied 590,093 572,338 Commercial real estate non-owner occupied 1,194,832 1,196,564 Construction 156,837 140,905 Total commercial loans and leases receivable 5,802,692 5,960,549 Consumer: Residential real estate 293,805 317,170 Manufactured housing 59,977 62,243 Installment 1,380,015 1,235,406 Total consumer loans receivable 1,733,797 1,614,819 Loans and leases receivable (2) 7,536,489 7,575,368 Allowance for credit losses on loans and leases (128,736) (144,176) Total loans and leases receivable, net of allowance for credit losses on loans and leases $ 15,993,464 $ 15,608,989 (1) Includes direct finance equipment leases of $107.1 million and $108.0 million at March 31, 2021 and December 31, 2020, respectively. (2) Includes deferred (fees) costs and unamortized (discounts) premiums, net of $(133.2) million and $(54.6) million at March 31, 2021 and December 31, 2020, respectively.
Loans and Leases Receivable by Loan Type and Performance Status	The following tables summarize loans and leases receivable by loan and lease type and performance status as of March 31, 2021 and December 31, 2020: March 31, 2021 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Loans and leases not past due (2) Total loans and leases (3) Multi-family $ 8,480 $ 1,245 $ 16,703 $ 26,428 $ 1,613,850 $ 1,640,278 Commercial and industrial 2,086 4,732 2,705 9,523 2,211,129 2,220,652 Commercial real estate owner occupied 1,920 — 2,219 4,139 585,954 590,093 Commercial real estate non-owner occupied 2,169 — 2,356 4,525 1,190,307 1,194,832 Construction — — — — 156,837 156,837 Residential real estate 2,514 235 1,324 4,073 289,732 293,805 Manufactured housing 1,403 871 1,917 4,191 55,786 59,977 Installment 5,492 2,125 78 7,695 1,372,320 1,380,015 Total $ 24,064 $ 9,208 $ 27,302 $ 60,574 $ 7,475,915 $ 7,536,489 December 31, 2020 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Loans and leases not past due (2) Total loans and leases (3) Multi-family $ 4,193 $ 5,224 $ 14,907 $ 24,324 $ 1,736,977 $ 1,761,301 Commercial and industrial 2,257 1,274 3,079 6,610 2,282,831 2,289,441 Commercial real estate owner occupied 864 1,324 2,370 4,558 567,780 572,338 Commercial real estate non-owner occupied — 60 2,356 2,416 1,194,148 1,196,564 Construction — — — — 140,905 140,905 Residential real estate 6,640 1,827 1,856 10,323 306,847 317,170 Manufactured housing 1,518 673 1,951 4,142 58,101 62,243 Installment 6,161 3,430 81 9,672 1,225,734 1,235,406 Total $ 21,633 $ 13,812 $ 26,600 $ 62,045 $ 7,513,323 $ 7,575,368 (1) Includes past due loans and leases that are accruing interest because collection is considered probable. (2) Loans and leases where next payment due is less than 30 days from the report date. The March 31, 2021 and December 31, 2020 tables exclude PPP loans of $5.2 billion and $4.6 billion, respectively, which are all current as of March 31, 2021 and December 31, 2020. (3) Includes PCD loans of $12.5 million and $13.4 million at March 31, 2021 and December 31, 2020, respectively.
Amortized cost of Loans and Leases on Nonaccrual Status	The following table presents the amortized cost of loans and leases held for investment on nonaccrual status. March 31, 2021 (1) December 31, 2020 (1) (amounts in thousands) Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Multi-family $ 20,530 $ — $ 20,530 $ 18,800 $ 2,928 $ 21,728 Commercial and industrial 7,282 262 7,544 6,384 2,069 8,453 Commercial real estate owner occupied 3,242 — 3,242 3,411 — 3,411 Commercial real estate non-owner occupied 2,259 97 2,356 2,356 — 2,356 Residential real estate 9,353 — 9,353 9,911 — 9,911 Manufactured housing — 2,871 2,871 — 2,969 2,969 Installment — 2,185 2,185 — 3,211 3,211 Total $ 42,666 $ 5,415 $ 48,081 $ 40,862 $ 11,177 $ 52,039 (1) Presented at amortized cost basis.
Schedule of Allowance for Credit Losses on Loans and Leases	The changes in the ACL on loans and leases for the three months ended March 31, 2021 and 2020 are presented in the tables below. Three Months Ended March 31, 2021 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total (amounts in thousands) Ending Balance, $ 12,620 $ 12,239 $ 9,512 $ 19,452 $ 5,871 $ 3,977 $ 5,190 $ 75,315 $ 144,176 Charge-offs (1,132) (635) (142) — — (50) — (12,687) (14,646) Recoveries — 260 8 10 5 10 — 1,832 2,125 Provision (benefit) for credit losses (3,462) (4,361) (3,443) (7,841) (1,773) (728) (390) 19,079 (2,919) Ending Balance, $ 8,026 $ 7,503 $ 5,935 $ 11,621 $ 4,103 $ 3,209 $ 4,800 $ 83,539 $ 128,736 Three Months Ended March 31, 2020 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total (amounts in thousands) Ending Balance, $ 6,157 $ 15,556 $ 2,235 $ 6,243 $ 1,262 $ 3,218 $ 1,060 $ 20,648 $ 56,379 Cumulative effect of change in accounting principle 2,171 759 5,773 7,918 (98) 1,518 3,802 57,986 79,829 Charge-offs — (97) — (12,797) — — — (6,246) (19,140) Recoveries — 54 3 — 3 29 — 340 429 Provision (benefit) for credit losses 422 2,534 516 17,166 767 (585) 125 10,841 31,786 Ending Balance, $ 8,750 $ 18,806 $ 8,527 $ 18,530 $ 1,934 $ 4,180 $ 4,987 $ 83,569 $ 149,283
Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession	The following table presents loans modified in a TDR by type of concession for the three months ended March 31, 2021 and 2020. There were no modifications that involved forgiveness of debt for the three months ended March 31, 2021 and 2020. Three Months Ended March 31, 2021 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Extensions of maturity — $ — 4 $ 245 Interest-rate reductions 8 184 12 530 Other (1) 20 541 — — Total 28 $ 725 16 $ 775 (1) Other includes covenant modifications, forbearance, loans discharged under Chapter 7 bankruptcy, or other concessions.
Summary of Loans Modified in Troubled Debt Restructurings and Related Recorded Investment Within Twelve Months	The following table presents, by loan type, the number of loans modified in TDRs and the related recorded investment, for which there was a payment default within twelve months following the modification: March 31, 2021 March 31, 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Manufactured housing 3 $ 48 — $ — Commercial real estate owner occupied — — 1 8 Residential real estate 1 56 5 684 Installment 16 250 — — Total loans 20 $ 354 6 $ 692
Credit Ratings of Covered and Non-Covered Loan Portfolio	The following tables present the credit ratings of loans and leases receivable as of March 31, 2021 and December 31, 2020. Term Loans Amortized Cost Basis by Origination Year as of March 31, 2021 (amounts in thousands) 2021 2020 2019 2018 2017 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Multi-family loans: Pass $ 90,497 $ 130,496 $ 22,678 $ 275,379 $ 418,365 $ 565,953 $ — $ — $ 1,503,368 Special mention — — — — 20,279 36,870 — — 57,149 Substandard — — — — 50,078 29,683 — — 79,761 Doubtful — — — — — — — Total multi-family loans $ 90,497 $ 130,496 $ 22,678 $ 275,379 $ 488,722 $ 632,506 $ — $ — $ 1,640,278 Commercial and industrial loans and leases: Pass $ 274,698 $ 448,597 $ 335,492 $ 139,864 $ 109,093 $ 112,621 $ 692,981 $ — $ 2,113,346 Special mention 16,935 13,200 1,044 563 33 258 16,342 — 48,375 Substandard — 10,856 6,619 18,049 7,148 7,752 8,507 — 58,931 Doubtful — — — — — — — — Total commercial and industrial loans and leases $ 291,633 $ 472,653 $ 343,155 $ 158,476 $ 116,274 $ 120,631 $ 717,830 $ — $ 2,220,652 Commercial real estate owner occupied loans: Pass $ 33,144 $ 82,661 $ 167,487 $ 71,146 $ 61,561 $ 133,469 $ 672 $ — $ 550,140 Special mention — — 4,286 — 11,010 292 — — 15,588 Substandard — — 2,848 9,538 240 11,739 — — 24,365 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 33,144 $ 82,661 $ 174,621 $ 80,684 $ 72,811 $ 145,500 $ 672 $ — $ 590,093 Commercial real estate non-owner occupied: Pass $ 11,186 $ 120,080 $ 94,136 $ 95,355 $ 120,861 $ 423,438 $ 14,019 $ — $ 879,075 Special mention — 61,994 11,285 996 99,671 53,340 — — 227,286 Substandard — — — 17,741 20,611 50,119 — — 88,471 Doubtful — — — — — — — — Total commercial real estate non-owner occupied loans $ 11,186 $ 182,074 $ 105,421 $ 114,092 $ 241,143 $ 526,897 $ 14,019 $ — $ 1,194,832 Construction: Pass $ 971 $ 28,168 $ 110,973 $ 4,921 $ — $ 9,627 $ 667 $ — $ 155,327 Special mention — 1,510 — — — — — — 1,510 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 971 $ 29,678 $ 110,973 $ 4,921 $ — $ 9,627 $ 667 $ — $ 156,837 Total commercial loans and leases receivable $ 427,431 $ 897,562 $ 756,848 $ 633,552 $ 918,950 $ 1,435,161 $ 733,188 $ — $ 5,802,692 Residential real estate loans: Performing $ 2,573 $ 11,110 $ 14,660 $ 12,060 $ 7,379 $ 105,969 $ 131,018 $ — $ 284,769 Non-performing — — 98 906 780 4,785 2,467 — 9,036 Total residential real estate loans $ 2,573 $ 11,110 $ 14,758 $ 12,966 $ 8,159 $ 110,754 $ 133,485 $ — $ 293,805 Manufactured housing loans: Performing $ — $ — $ 300 $ 443 $ 77 $ 54,394 $ — $ — $ 55,214 Non-performing — — — — — 4,763 — — 4,763 Total manufactured housing loans $ — $ — $ 300 $ 443 $ 77 $ 59,157 $ — $ — $ 59,977 Installment loans: Performing $ 204,365 $ 476,856 $ 599,887 $ 91,009 $ 3,633 $ 1,249 $ — $ — $ 1,376,999 Non-performing — 341 2,117 437 33 88 — — 3,016 Total installment loans $ 204,365 $ 477,197 $ 602,004 $ 91,446 $ 3,666 $ 1,337 $ — $ — $ 1,380,015 Total consumer loans $ 206,938 $ 488,307 $ 617,062 $ 104,855 $ 11,902 $ 171,248 $ 133,485 $ — $ 1,733,797 Loans and leases receivable $ 634,369 $ 1,385,869 $ 1,373,910 $ 738,407 $ 930,852 $ 1,606,409 $ 866,673 $ — $ 7,536,489 Term Loans Amortized Cost Basis by Origination Year as of December 31, 2020 (amounts in thousands) 2020 2019 2018 2017 2016 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Multi-family loans: Pass $ 150,835 $ 23,716 $ 299,319 $ 535,510 $ 227,296 $ 420,809 $ — $ — $ 1,657,485 Special mention — — — 20,901 10,394 26,708 — — 58,003 Substandard — — — 34,197 8,256 3,360 — — 45,813 Doubtful — — — — — — — — — Total multi-family loans $ 150,835 $ 23,716 $ 299,319 $ 590,608 $ 245,946 $ 450,877 $ — $ — $ 1,761,301 Commercial and industrial loans and leases: Pass $ 729,270 $ 373,050 $ 141,943 $ 116,793 $ 45,367 $ 71,502 $ 717,007 $ — $ 2,194,932 Special mention 13,200 1,117 436 113 516 21 17,524 — 32,927 Substandard 9,968 6,890 19,065 5,901 8,318 2,722 8,718 — 61,582 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 752,438 $ 381,057 $ 161,444 $ 122,807 $ 54,201 $ 74,245 $ 743,249 $ — $ 2,289,441 Commercial real estate owner occupied loans: Pass $ 82,343 $ 168,977 $ 72,615 $ 70,642 $ 46,510 $ 91,798 $ 741 $ — $ 533,626 Special mention — 4,464 — 9,056 — 555 — — 14,075 Substandard — 2,848 9,499 342 2,231 9,717 — — 24,637 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 82,343 $ 176,289 $ 82,114 $ 80,040 $ 48,741 $ 102,070 $ 741 $ — $ 572,338 Commercial real estate non-owner occupied: Pass $ 143,231 $ 105,430 $ 97,882 $ 157,835 $ 155,168 $ 313,559 $ — $ — $ 973,105 Special mention 39,994 — — 66,745 24,218 14,613 — — 145,570 Substandard — — 17,741 20,611 366 39,171 — — 77,889 Doubtful — — — — — — — — Total commercial real estate non-owner occupied loans $ 183,225 $ 105,430 $ 115,623 $ 245,191 $ 179,752 $ 367,343 $ — $ — $ 1,196,564 Construction: Pass $ 19,932 $ 105,466 $ 4,954 $ — $ 9,700 $ — $ 853 $ — $ 140,905 Special mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 19,932 $ 105,466 $ 4,954 $ — $ 9,700 $ — $ 853 $ — $ 140,905 Total commercial loans and leases receivable $ 1,188,773 $ 791,958 $ 663,454 $ 1,038,646 $ 538,340 $ 994,535 $ 744,843 $ — $ 5,960,549 Residential real estate loans: Performing $ 6,708 $ 13,617 $ 6,810 $ 10,850 $ 38,143 $ 69,496 $ 161,576 $ — $ 307,200 Non-performing — — 160 785 1,350 4,395 3,280 — 9,970 Total residential real estate loans $ 6,708 $ 13,617 $ 6,970 $ 11,635 $ 39,493 $ 73,891 $ 164,856 $ — $ 317,170 Manufactured housing loans: Performing $ — $ 295 $ 609 $ 76 $ 41 $ 56,837 $ — $ — $ 57,858 Non-performing — — — — — 4,385 — — 4,385 Total manufactured housing loans $ — $ 295 $ 609 $ 76 $ 41 $ 61,222 $ — $ — $ 62,243 Installment loans: Performing $ 319,453 $ 791,235 $ 114,988 $ 4,736 $ 514 $ 1,204 $ — $ — $ 1,232,130 Non-performing 305 2,326 485 41 2 117 — — 3,276 Total installment loans $ 319,758 $ 793,561 $ 115,473 $ 4,777 $ 516 $ 1,321 $ — $ — $ 1,235,406 Total consumer loans $ 326,466 $ 807,473 $ 123,052 $ 16,488 $ 40,050 $ 136,434 $ 164,856 $ — $ 1,614,819 Loans and leases receivable $ 1,515,239 $ 1,599,431 $ 786,506 $ 1,055,134 $ 578,390 $ 1,130,969 $ 909,699 $ — $ 7,575,368
Schedule of Loan Purchases and Sales	Purchases and sales of loans were as follows for the three months ended March 31, 2021 and 2020: Three Months Ended March 31, (amounts in thousands) 2021 2020 Purchases (1) Residential real estate $ — $ 495 Installment (2) 115,849 191,761 Total $ 115,849 $ 192,256 Sales (3) Commercial and industrial $ 18,931 $ — Commercial real estate owner occupied 2,237 — Commercial real estate non-owner occupied 18,366 — Installment — 1,822 Total $ 39,534 $ 1,822 (1) Amounts reported in the above table are the unpaid principal balance at time of purchase. The purchase price was 101.0% and 100.6% of loans outstanding for the three months ended March 31, 2021 and 2020, respectively. (2) Installment loan purchases for the three months ended March 31, 2021 and 2020 consist of third-party originated unsecured consumer loans. None of the loans are considered sub-prime at the time of origination. Customers considers sub-prime borrowers to be those with FICO scores below 660. (3) Amounts reported in the above table are the unpaid principal balance at time of sale. For the quarters ended March 31, 2021 and 2020, loan sales resulted in net gains of $1.6 million and $11 thousand, respectively.

Leases (Tables)

Leases (Tables)	3 Months Ended
Leases (Tables)	Mar. 31, 2021
Leases [Abstract]
Lessee, Summary of Right-of-Use Assets and Lease Liabilities	The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 15,442 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 16,829 $ 18,005 (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations.
Lease, Cost	The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,117 $ 1,205 (1) There were no variable lease costs for the three months ended March 31, 2021 and 2020, and sublease income for operating leases is immaterial. (2) Excludes operating lease costs of BMT included in loss from discontinued operations in the consolidated statement of income.
Maturities of Non-cancelable Operating Lease Liabilities	Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2021: (amounts in thousands) March 31, 2021 2021 $ 3,477 2022 4,509 2023 4,031 2024 2,957 2025 1,887 Thereafter 1,465 Total minimum payments 18,326 Less: interest 1,497 Present value of lease liabilities $ 16,829
Summary of Lease Term and Discount Rate for Operating Leases	The following table summarizes the weighted average remaining lease term and discount rate for Customers' operating leases at March 31, 2021 and December 31, 2020: (amounts in thousands) March 31, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.5 years 4.7 years Weighted average discount rate Operating leases (1) 2.89 % 2.90 % (1) Excludes operating leases of BMT included in assets and liabilities of discontinued operations.
Lessor, Lease Receivables and Investment in Operating Leases and their Corresponding Balance Sheet Location	The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2021 and December 31, 2020: (amounts in thousands) Classification March 31, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 104,230 $ 104,982 Guaranteed residual assets Loans and leases receivable 9,452 12,988 Unguaranteed residual assets Loans and leases receivable 3,807 1,229 Deferred initial direct costs Loans and leases receivable 528 560 Unearned income Loans and leases receivable (10,433) (11,175) Net investment in direct financing leases $ 107,584 $ 108,584 Operating leases Investment in operating leases Other assets $ 136,754 $ 131,791 Accumulated depreciation Other assets (33,204) (28,919) Deferred initial direct costs Other assets 1,113 996 Net investment in operating leases 104,663 103,868 Total lease assets $ 212,247 $ 212,452

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
Borrowings (Tables)	Mar. 31, 2021
Debt Disclosure [Abstract]
Short Term Borrowings	Short-term debt at March 31, 2021 and December 31, 2020 was as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ 850,000 1.21 % $ 850,000 1.19 % Federal funds purchased 365,000 0.05 % 250,000 0.09 % Total short-term debt $ 1,215,000 $ 1,100,000
Summary of Bancorps Short Term Borrowings	The following is a summary of additional information relating to Customers' short-term debt: (dollars in thousands) March 31, 2021 December 31, 2020 FHLB advances Maximum outstanding at any month end $ 850,000 $ 910,000 Average balance during the period 850,000 809,788 Weighted-average interest rate during the period 2.48 % 2.31 % Federal funds purchased Maximum outstanding at any month end 365,000 842,000 Average balance during the period 16,333 239,481 Weighted-average interest rate during the period 0.07 % 0.19 %
Schedule of Long-term Debt	Long-term FHLB and FRB advances at March 31, 2021 and December 31, 2020 were as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FRB PPP Liquidity Facility advances $ 3,284,156 0.35 % $ 4,415,016 0.35 % Total long-term FHLB and FRB advances $ 3,284,156 $ 4,415,016 The maximum borrowing capacity with the FHLB and FRB at March 31, 2021 and December 31, 2020 was as follows: (amounts in thousands) March 31, 2021 December 31, 2020 Total maximum borrowing capacity with the FHLB $ 2,492,783 $ 2,729,516 Total maximum borrowing capacity with the FRB (1) 183,124 223,299 Qualifying loans serving as collateral against FHLB and FRB advances (1) 3,258,271 3,363,364 (1) Amounts reported in the above table exclude borrowings under the PPPLF, which are limited to the face value of the loans originated under the PPP. At March 31, 2021, Customers had $3.3 billion of borrowings under the PPPLF, with a borrowing capacity of up to $5.2 billion, which is the face value of the qualifying loans Customers has originated and outstanding under the PPP. At December 31, 2020, Customers had $4.4 billion of borrowings under the PPPLF. Senior and Subordinated Debt Long-term senior notes and subordinated debt at March 31, 2021 and December 31, 2020 were as follows: March 31, 2021 December 31, 2020 (dollars in thousands) Issued by Ranking Amount Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior $ 24,581 $ 24,552 4.500 % $ 25,000 September 2019 September 2024 100.000 % Customers Bancorp Senior 99,557 99,485 3.950 % 100,000 June 2017 June 2022 99.775 % Total other borrowings $ 124,138 $ 124,037 Customers Bancorp Subordinated (1)(2) $ 72,267 $ 72,222 5.375 % $ 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (1)(3) 109,197 109,172 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 181,464 $ 181,394 (1) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (2) Customers Bancorp has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after December 30, 2029.

Regulatory Capital (Tables)

Regulatory Capital (Tables)	3 Months Ended
Regulatory Capital (Tables)	Mar. 31, 2021
Regulatory Capital [Abstract]
Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios	Generally, to comply with the regulatory definition of adequately capitalized, or well capitalized, respectively, or to comply with the Basel III capital requirements, an institution must at least maintain the common equity Tier 1, Tier 1 and total risk-based capital ratios and the Tier 1 leverage ratio in excess of the related minimum ratios as set forth in the following table: Minimum Capital Levels to be Classified as: Actual Adequately Capitalized Well Capitalized Basel III Compliant (amounts in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of March 31, 2021: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,021,018 8.774 % $ 523,659 4.500 % N/A N/A $ 814,581 7.000 % Customers Bank $ 1,365,443 11.745 % $ 523,182 4.500 % $ 755,708 6.500 % $ 813,839 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,238,489 10.643 % $ 698,212 6.000 % N/A N/A $ 989,134 8.500 % Customers Bank $ 1,365,443 11.745 % $ 697,576 6.000 % $ 930,102 8.000 % $ 988,233 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,447,285 12.437 % $ 930,949 8.000 % N/A N/A $ 1,221,871 10.500 % Customers Bank $ 1,523,681 13.106 % $ 930,102 8.000 % $ 1,162,627 10.000 % $ 1,220,758 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,238,489 8.478 % $ 584,359 4.000 % N/A N/A $ 584,359 4.000 % Customers Bank $ 1,365,443 9.352 % $ 584,025 4.000 % $ 730,031 5.000 % $ 584,025 4.000 % As of December 31, 2020: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 954,839 8.079 % $ 531,844 4.500 % N/A N/A $ 827,312 7.000 % Customers Bank $ 1,254,082 10.615 % $ 531,639 4.500 % $ 767,923 6.500 % $ 826,994 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,172,310 9.919 % $ 709,125 6.000 % N/A N/A $ 1,004,594 8.500 % Customers Bank $ 1,254,082 10.615 % $ 708,852 6.000 % $ 945,136 8.000 % $ 1,004,207 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,401,119 11.855 % $ 945,500 8.000 % N/A N/A $ 1,240,969 10.500 % Customers Bank $ 1,424,791 12.060 % $ 945,136 8.000 % $ 1,181,421 10.000 % $ 1,240,492 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,172,310 8.597 % $ 545,485 4.000 % N/A N/A $ 545,485 4.000 % Customers Bank $ 1,254,082 9.208 % $ 544,758 4.000 % $ 680,947 5.000 % $ 544,758 4.000 %

Disclosures About Fair Value _2

Disclosures About Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The estimated fair values of Customers' financial instruments at March 31, 2021 and December 31, 2020 were as follows. Fair Value Measurements at March 31, 2021 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 515,364 $ 515,364 $ 515,364 $ — $ — Debt securities, available for sale 1,437,077 1,437,077 — 1,437,077 — Equity securities 4,827 4,827 4,827 — — Loans held for sale 46,106 46,106 — 45,463 643 Total loans and leases receivable, net of allowance for credit losses on loans and leases 15,993,464 16,487,438 — 3,407,622 13,079,816 FHLB, Federal Reserve Bank and other restricted stock 69,420 69,420 — 69,420 — Derivatives 36,502 36,502 — 36,306 196 Liabilities: Deposits $ 12,472,440 $ 12,473,798 $ 11,806,559 $ 667,239 $ — FRB PPP Liquidity Facility 3,284,156 3,284,156 — 3,284,156 — Federal funds purchased 365,000 365,000 365,000 — — FHLB advances 850,000 850,787 — 850,787 — Other borrowings 124,138 135,571 — 135,571 — Subordinated debt 181,464 197,080 — 197,080 — Derivatives 37,536 37,536 — 37,536 — Fair Value Measurements at December 31, 2020 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 693,354 $ 693,354 $ 693,354 $ — $ — Debt securities, available for sale 1,206,431 1,206,431 — 1,206,431 — Equity securities 3,854 3,854 3,854 — — Loans held for sale 79,086 79,086 — 78,443 643 Total loans and leases receivable, net of allowance for credit losses on loans and leases 15,608,989 16,222,202 — 3,616,432 12,605,770 FHLB, Federal Reserve Bank and other restricted stock 71,368 71,368 — 71,368 — Derivatives 54,223 54,223 — 54,023 200 Liabilities: Deposits $ 11,309,929 $ 11,312,494 $ 10,657,998 $ 654,496 $ — FRB PPP Liquidity Facility 4,415,016 4,415,016 — 4,415,016 — Federal funds purchased 250,000 250,000 250,000 — — FHLB advances 850,000 852,442 — 852,442 — Other borrowings 124,037 129,120 — 129,120 — Subordinated debt 181,394 193,119 — 193,119 — Derivatives 98,164 98,164 — 98,164 —
Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis	For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at March 31, 2021 and December 31, 2020 were as follows: March 31, 2021 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 386,993 $ — $ 386,993 U.S. government agencies securities — 20,053 — 20,053 Agency-guaranteed mortgage-backed securities — 37,634 — 37,634 Agency-guaranteed collateralized mortgage obligations — 211,104 — 211,104 Commercial mortgage-backed securities — 13,059 — 13,059 Collateralized loan obligations — 163,094 — 163,094 Corporate notes — 257,924 — 257,924 Private label collateralized mortgage obligations — 328,689 — 328,689 State and political subdivision debt securities — 18,527 — 18,527 Equity securities 4,827 — — 4,827 Derivatives — 36,306 196 36,502 Loans held for sale – fair value option — 1,205 — 1,205 Loans receivable, mortgage warehouse – fair value option — 3,407,622 — 3,407,622 Total assets – recurring fair value measurements $ 4,827 $ 4,882,210 $ 196 $ 4,887,233 Liabilities Derivatives $ — $ 37,536 $ — $ 37,536 Measured at Fair Value on a Nonrecurring Basis: Assets Loans held for sale $ — $ 44,258 $ — $ 44,258 Collateral-dependent loans — — 7,331 7,331 Other real estate owned — — 35 35 Total assets – nonrecurring fair value measurements $ — $ 44,258 $ 7,366 $ 51,624 December 31, 2020 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 377,145 $ — $ 377,145 U.S. government agencies securities — 20,034 — 20,034 Agency-guaranteed mortgage–backed securities — 63,091 — 63,091 Agency-guaranteed collateralized mortgage obligations — 161,767 — 161,767 Collateralized loan obligations — 32,367 — 32,367 Corporate notes — 396,744 — 396,744 Private label collateralized mortgage obligations — 136,992 — 136,992 State and political subdivision debt securities — 18,291 — 18,291 Equity securities 3,854 — — 3,854 Derivatives — 54,023 200 54,223 Loans held for sale – fair value option — 5,509 — 5,509 Loans receivable, mortgage warehouse – fair value option — 3,616,432 — 3,616,432 Total assets – recurring fair value measurements $ 3,854 $ 4,882,395 $ 200 $ 4,886,449 Liabilities Derivatives $ — $ 98,164 $ — $ 98,164 Measured at Fair Value on a Nonrecurring Basis: Assets Loans held for sale $ — $ 55,683 $ — $ 55,683 Collateral-dependent loans — 17,251 3,867 21,118 Other real estate owned — — 35 35 Total assets – nonrecurring fair value measurements $ — $ 72,934 $ 3,902 $ 76,836
Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis	The changes in residential mortgage loan commitments (Level 3 assets) measured at fair value on a recurring basis for the three months ended March 31, 2021 and 2020 are summarized in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 13 - DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments Three Months Ended March 31, (amounts in thousands) 2021 2020 Balance at December 31 $ 200 $ 79 Issuances 196 215 Settlements (200) (79) Balance at March 31 $ 196 $ 215
Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis	The following table summarizes financial assets and financial liabilities measured at fair value as of March 31, 2021 and December 31, 2020 on a recurring and nonrecurring basis for which Customers utilized Level 3 inputs to measure fair value. The unobservable Level 3 inputs noted below contain a level of uncertainty that may differ from what is realized in an immediate settlement of the assets. Therefore, Customers may realize a value higher or lower than the current estimated fair value of the assets. Quantitative Information about Level 3 Fair Value Measurements (amounts in thousands) Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (4) March 31, 2021 Collateral-dependent loans – real estate $ 6,778 Collateral appraisal (1) Liquidation expenses (2) 8% - 20% (12%) Collateral-dependent loans – commercial and industrial 553 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 7% - 8% (8%) 40% - 40% (40%) Residential mortgage loan commitments 196 Adjusted market bid Pull-through rate 81% - 81% (81%) (1) Obtained from approved independent appraisers. Appraisals are current and in compliance with credit policy. Customers does not generally discount appraisals. (2) Appraisals are adjusted by management for liquidation expenses. The range and weighted average of liquidation expense adjustments are presented as a percentage of the appraisal. (3) Business asset valuation obtained from independent party. (4) Business asset valuations may be adjusted by management for qualitative factors including economic conditions and the condition of the business assets. The range and weighted average of the business asset adjustments are presented as a percent of the business asset valuation. Quantitative Information about Level 3 Fair Value Measurements (amounts in thousands) Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (4) December 31, 2020 Collateral-dependent loans – real estate $ 2,928 Collateral appraisal (1) Liquidation expenses (2) 8% - 8% (8%) Collateral-dependent loans – commercial and industrial 939 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 7% - 8% (8%) 60% - 60% (60%) Other real estate owned 35 Collateral appraisal (1) Liquidation expenses (2) 8% - 9% (9%) Residential mortgage loan commitments 200 Adjusted market bid Pull-through rate 78% - 78% (78%) (1) Obtained from approved independent appraisers. Appraisals are current and in compliance with credit policy. Customers does not generally discount appraisals. (2) Appraisals are adjusted by management for liquidation expenses. The range and weighted average of liquidation expense adjustments are presented as a percentage of the appraisal. (3) Business asset valuation obtained from independent party. (4) Business asset valuations may be adjusted by management for qualitative factors including economic conditions and the condition of the business assets. The range and weighted average of the business asset adjustments are presented as a percent of the business asset valuation.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	3 Months Ended
Derivative Instruments and Hedging Activities (Tables)	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	As of March 31, 2021, the following amounts were recorded on the consolidated balance sheet related to cumulative basis adjustments for fair value hedges. Amortized Cost Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items (amounts in thousands) March 31, December 31, March 31, December 31, 2021 2020 2021 2020 Available for sale debt securities $ 85,500 $ 272,159 $ 976 $ 741
Fair Value of Derivative Financial Instruments	The following tables present the fair value of Customers' derivative financial instruments as well as their presentation on the balance sheet as of March 31, 2021 and December 31, 2020. March 31, 2021 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ — Other liabilities $ 1,034 Total $ — $ 1,034 Derivatives designated as fair value hedges: Interest rate swaps Other assets $ 976 Other liabilities $ — Total $ 976 $ — Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 34,962 Other liabilities $ 36,154 Interest rate caps Other assets 166 Other liabilities 166 Credit contracts Other assets 202 Other liabilities 182 Residential mortgage loan commitments Other assets 196 Other liabilities — Total $ 35,526 $ 36,502 December 31, 2020 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ 196 Other liabilities $ 40,765 Total $ 196 $ 40,765 Derivatives designated as fair value hedges: Interest rate swaps Other assets $ — Other liabilities $ 741 Total $ — $ 741 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 53,455 Other liabilities $ 56,209 Interest rate caps Other assets 46 Other liabilities 46 Credit contracts Other assets 326 Other liabilities 403 Residential mortgage loan commitments Other assets 200 Other liabilities — Total $ 54,027 $ 56,658
Effect of Derivative Financial Instruments on Net Income and Comprehensive Income	The following tables present amounts included in the consolidated statements of income related to derivatives designated as fair value hedges and derivatives not designated as hedges for the three months ended March 31, 2021 and 2020. Amount of Income (Loss) Recognized in Earnings Three Months Ended March 31, (amounts in thousands) Income Statement Location 2021 2020 Derivatives designated as fair value hedges: Recognized on interest rate swaps Net interest income $ 4,907 $ — Recognized on hedged available for sale debt securities Net interest income (4,907) — Total $ — $ — Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 2,399 $ (1,015) Interest rate caps Other non-interest income — — Credit contracts Other non-interest income 137 (132) Residential mortgage loan commitments Mortgage banking income (4) 137 Total $ 2,532 $ (1,010) Effect of Derivative Instruments on Comprehensive Income The following table presents the effect of Customers' derivative financial instruments on comprehensive income for the three months ended March 31, 2021 and 2020. Amount of Gain (Loss) Recognized in OCI on Derivatives (1) Location of Gain (Loss) Reclassified from Accumulated OCI into Income Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Three Months Ended March 31, Three Months Ended (amounts in thousands) 2021 2020 2021 2020 Derivatives in cash flow hedging relationships: Interest rate swaps $ 9,113 $ (20,346) Interest expense $ (1,459) $ (1,478) — — Other non-interest income (24,467) — Total $ 9,113 $ (20,346) $ (25,926) $ (1,478) (1) Amounts presented are net of taxes. See NOTE 5 - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) for the total effect on other comprehensive income (loss) from derivatives designated as cash flow hedges for the periods presented.
Summary of Offsetting of Financial Assets and Derivative Assets	The following tables present derivative instruments that are subject to enforceable master netting arrangements. Customers' interest rate swaps and interest rate caps with institutional counterparties are subject to master netting arrangements and are included in the table below. Interest rate swaps and interest rate caps with commercial banking customers and residential mortgage loan commitments are not subject to master netting arrangements and are excluded from the table below. Customers has not made a policy election to offset its derivative positions. Gross Amounts Recognized on the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Financial Instruments Cash Collateral Received/(Posted) Net Amount March 31, 2021 Interest rate derivative assets with institutional counterparties $ 98 $ — $ — $ 98 Interest rate derivative liabilities with institutional counterparties $ 35,017 $ — $ (35,017) $ — Gross Amounts Recognized on the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2020 Interest rate derivative assets with institutional counterparties $ 199 $ — $ — $ 199 Interest rate derivative liabilities with institutional counterparties $ 97,641 $ — $ (97,641) $ —
Summary of Offsetting of Financial Liabilities and Derivative Liabilities	The following tables present derivative instruments that are subject to enforceable master netting arrangements. Customers' interest rate swaps and interest rate caps with institutional counterparties are subject to master netting arrangements and are included in the table below. Interest rate swaps and interest rate caps with commercial banking customers and residential mortgage loan commitments are not subject to master netting arrangements and are excluded from the table below. Customers has not made a policy election to offset its derivative positions. Gross Amounts Recognized on the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Financial Instruments Cash Collateral Received/(Posted) Net Amount March 31, 2021 Interest rate derivative assets with institutional counterparties $ 98 $ — $ — $ 98 Interest rate derivative liabilities with institutional counterparties $ 35,017 $ — $ (35,017) $ — Gross Amounts Recognized on the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2020 Interest rate derivative assets with institutional counterparties $ 199 $ — $ — $ 199 Interest rate derivative liabilities with institutional counterparties $ 97,641 $ — $ (97,641) $ —

Description of the Business - A

Description of the Business - Additional Information (Detail)	Mar. 31, 2021branch
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of branches (branch)	12

Discontinued Operations - Narra

Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands	Jan. 04, 2021	Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of non-controlling interest in BMT		$ 23,125	$ 0
Special dividend (shares)		0.15389
Discontinued Operations \| BankMobile Technologies, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of non-controlling interest in BMT	$ 23,100
Share consideration, shares	4,876,387
Special dividend (shares)	0.15389
Share consideration related to severance, shares	1,348,748
Percentage of common stock	52.00%
Expenses under the deposit servicing agreement		$ 13,700
Discontinued Operations \| BankMobile Technologies, Inc. \| Minimum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transition services agreement, term	1 year
Discontinued Operations \| BankMobile Technologies, Inc. \| Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transition services agreement, term	10 years

Discontinued Operations - Incom

Discontinued Operations - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Discontinued operations:
Loss from discontinued operations before income taxes	$ (20,354)	$ (6,722)
Income tax expense (benefit) from discontinued operations	17,682	(1,368)
Net loss from discontinued operations	(38,036)	(5,354)
BM Technologies Inc. \| Discontinued Operations, Disposed of by Sale
Discontinued operations:
Non-interest income	0	16,072
Non-interest expense	20,354	22,794
Loss from discontinued operations before income taxes	(20,354)	(6,722)
Income tax expense (benefit) from discontinued operations	17,682	(1,368)
Net loss from discontinued operations	$ (38,036)	$ (5,354)

Discontinued Operations - Balan

Discontinued Operations - Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Carrying amounts of assets included as part of discontinued operations:
Total assets of discontinued operations	$ 0	$ 62,055
Carrying amounts of liabilities included as part of discontinued operations:
Total liabilities of discontinued operations	$ 0	39,704
BM Technologies Inc. \| Discontinued Operations, Disposed of by Sale
Carrying amounts of assets included as part of discontinued operations:
Cash and cash equivalents		2,989
Premises and equipment, net		401
Goodwill and other intangibles		10,329
Other assets		48,336
Total assets of discontinued operations		62,055
Carrying amounts of liabilities included as part of discontinued operations:
Borrowings from Customers Bank		21,000
Accrued interest payable and other liabilities		18,704
Total liabilities of discontinued operations		$ 39,704

Earnings (Loss) Per Share - Com

Earnings (Loss) Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income from continuing operations available to common shareholders	$ 71,240	$ 4,839
Net loss from discontinued operations	(38,036)	(5,354)
Net income (loss) available to common shareholders	$ 33,204	$ (515)
Weighted-average number of common shares outstanding - basic (shares)	31,883,946	31,391,151
Share-based compensation plans (shares)	957,765	0
Weighted-average number of common shares - diluted (shares)	32,841,711	31,391,151
Basic earnings (loss) per common share from continuing operations (usd per share)	$ 2.23	$ 0.15
Basic earnings (loss) per common share from discontinued operations (usd per share)	(1.19)	(0.17)
Basic earnings (loss) per common share (usd per share)	1.04	(0.02)
Diluted earnings (loss) per common share from continuing operations (usd per share)	2.17	0.15
Diluted earnings (loss) per common share from discontinued operations (usd per share)	(1.16)	(0.17)
Diluted earnings (loss) per common share (usd per share)	$ 1.01	$ (0.02)

Earnings (Loss) Per Share - Ant

Earnings (Loss) Per Share - Anti-dilutive Securities Excluded from Computation of Earnings (Loss) Per Share (Detail) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based compensation awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities (shares)	277,725	6,718,131

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Loss) By Component (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 1,117,086	$ 1,052,795
Unrealized gains (losses) arising during period, before tax	12,715	(36,795)
Income tax effect	(3,306)	9,717
Other comprehensive income (loss) before reclassifications	9,409	(27,078)
Reclassification adjustments for (gains) losses included in net income, before tax	2,360	(2,496)
Income tax effect	(614)	649
Amounts reclassified from accumulated other comprehensive income (loss) to net income	1,746	(1,847)
Other comprehensive income (loss), net of income tax effect	11,155	(28,925)
Ending balance	1,188,721	964,636
Unrealized Gains (Losses) on Available for Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	23,312	14,287
Unrealized gains (losses) arising during period, before tax	400	(9,098)
Income tax effect	(104)	2,366
Other comprehensive income (loss) before reclassifications	296	(6,732)
Reclassification adjustments for (gains) losses included in net income, before tax	(23,566)	(3,974)
Income tax effect	6,127	1,033
Amounts reclassified from accumulated other comprehensive income (loss) to net income	(17,439)	(2,941)
Other comprehensive income (loss), net of income tax effect	(17,143)	(9,673)
Ending balance	6,169	4,614
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(29,076)	(15,537)
Unrealized gains (losses) arising during period, before tax	12,315	(27,697)
Income tax effect	(3,202)	7,351
Other comprehensive income (loss) before reclassifications	9,113	(20,346)
Reclassification adjustments for (gains) losses included in net income, before tax	25,926	1,478
Income tax effect	(6,741)	(384)
Amounts reclassified from accumulated other comprehensive income (loss) to net income	19,185	1,094
Other comprehensive income (loss), net of income tax effect	28,298	(19,252)
Ending balance	(778)	(34,789)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(5,764)	(1,250)
Other comprehensive income (loss), net of income tax effect	11,155	(28,925)
Ending balance	$ 5,391	$ (30,175)

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,429,715	$ 1,174,188
Gross Unrealized Gains	11,028	32,890
Gross Unrealized Losses	(3,666)	(647)
Fair Value	1,437,077	1,206,431
Equity securities	4,827	3,854
Investment securities, at fair value	1,441,904	1,210,285
Available-for-sale debt securities, accrued interest	4,300	4,200
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	381,525	372,640
Gross Unrealized Gains	5,717	4,515
Gross Unrealized Losses	(249)	(10)
Fair Value	386,993	377,145
U.S. government agencies securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,000	20,000
Gross Unrealized Gains	53	34
Gross Unrealized Losses	0	0
Fair Value	20,053	20,034
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	37,933	61,178
Gross Unrealized Gains	9	1,913
Gross Unrealized Losses	(308)	0
Fair Value	37,634	63,091
Agency-guaranteed collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	211,226	160,950
Gross Unrealized Gains	365	916
Gross Unrealized Losses	(487)	(99)
Fair Value	211,104	161,767
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	162,998	32,367
Gross Unrealized Gains	139	0
Gross Unrealized Losses	(43)	0
Fair Value	163,094	32,367
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,059
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	13,059
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	255,126	372,764
Gross Unrealized Gains	3,422	24,144
Gross Unrealized Losses	(624)	(164)
Fair Value	257,924	396,744
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	329,367	136,943
Gross Unrealized Gains	1,277	423
Gross Unrealized Losses	(1,955)	(374)
Fair Value	328,689	136,992
State and political subdivision debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,481	17,346
Gross Unrealized Gains	46	945
Gross Unrealized Losses	0	0
Fair Value	$ 18,527	$ 18,291

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)security	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)security
Investments, Debt and Equity Securities [Abstract]
Unrealized gain (loss) on investment securities	$ 1,000	$ (1,400)
Proceeds from sales of investment securities available for sale	353,915	0
Realized gain	$ 23,600	$ 4,000
Number of available-for-sale investment securities, unrealized loss position, less than twelve month category \| security	30
Number of available-for-sale investment securities, unrealized loss position, twelve month or more category \| security	0
Number of available-for-sale investment securities, unrealized loss position \| security			16
Pledged investment securities fair value	$ 17,600		$ 18,800

Investment Securities - Summa_2

Investment Securities - Summary of Available-for-Sale Debt Securities by Stated Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Due in one year or less, amortized cost	$ 0
Due after one years through five years, amortized cost	140,681
Due after five through ten years, amortized cost	142,991
Due after ten years, amortized cost	9,935
Amortized Cost	1,429,715	$ 1,174,188
Due in one year or less, fair value	0
Due after one years through five years, fair value	141,641
Due after five through ten years, fair value	144,893
Due after ten years, fair value	9,970
Total Debt Securities Fair Value	1,437,077	1,206,431
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	381,525
Amortized Cost	381,525	372,640
Debt securities, available-for-sale, without single maturity date, fair value	386,993
Total Debt Securities Fair Value	386,993	377,145
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	162,998
Amortized Cost	162,998	32,367
Debt securities, available-for-sale, without single maturity date, fair value	163,094
Total Debt Securities Fair Value	163,094	32,367
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	13,059
Amortized Cost	13,059
Debt securities, available-for-sale, without single maturity date, fair value	13,059
Total Debt Securities Fair Value	13,059
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	37,933
Amortized Cost	37,933	61,178
Debt securities, available-for-sale, without single maturity date, fair value	37,634
Total Debt Securities Fair Value	37,634	63,091
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	329,367
Amortized Cost	329,367	136,943
Debt securities, available-for-sale, without single maturity date, fair value	328,689
Total Debt Securities Fair Value	328,689	136,992
Agency-guaranteed collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	211,226
Amortized Cost	211,226	160,950
Debt securities, available-for-sale, without single maturity date, fair value	211,104
Total Debt Securities Fair Value	$ 211,104	$ 161,767

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) $ in Thousands	Mar. 31, 2021USD ($)
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	$ 369,291
Less than 12 Months, Unrealized Losses	(3,666)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	369,291
Unrealized Losses	(3,666)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	90,064
Less than 12 Months, Unrealized Losses	(249)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	90,064
Unrealized Losses	(249)
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	10,377
Less than 12 Months, Unrealized Losses	(308)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	10,377
Unrealized Losses	(308)
Agency-guaranteed collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	55,825
Less than 12 Months, Unrealized Losses	(487)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	55,825
Unrealized Losses	(487)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	55,703
Less than 12 Months, Unrealized Losses	(43)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	55,703
Unrealized Losses	(43)
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	48,905
Less than 12 Months, Unrealized Losses	(624)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	48,905
Unrealized Losses	(624)
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	108,417
Less than 12 Months, Unrealized Losses	(1,955)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	108,417
Unrealized Losses	$ (1,955)

Loans Held for Sale - Compositi

Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Receivables Held-for-sale [Abstract]
Multi-family loans, at lower of cost or fair value	$ 19,251	$ 0
Commercial and industrial loans, at lower of cost or fair value	0	55,683
Commercial real estate non-owner occupied loans, at lower of cost or fair value	0	17,251
Total commercial loans held for sale	19,251	72,934
Home equity conversion mortgages, at lower of cost or fair value	643	643
Residential mortgage loans, at fair value	1,205	5,509
Installment loans, at lower of cost or fair value	25,007	0
Total consumer loans held for sale	26,855	6,152
Loans held for sale	$ 46,106	$ 79,086

Loans Held for Sale - Narrative

Loans Held for Sale - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Receivables Held-for-sale [Abstract]
Loans held-for-sale (including nonperforming loans)	$ 0.6	$ 18.5

Loans and Leases Receivable a_3

Loans and Leases Receivable and Allowance for Credit Losses - Schedule of Loans and Leases Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, mortgage warehouse, at fair value	$ 3,407,622	$ 3,616,432
Loans receivable, PPP	5,178,089	4,561,365
Loans and leases receivable	7,536,489	7,575,368
Allowance for credit losses on loans and leases	(128,736)	(144,176)	$ (149,283)	$ (56,379)
Total loans and leases receivable, net of allowance for credit losses on loans and leases	15,993,464	15,608,989
Deferred (fees) costs and unamortized (discounts) premiums, net	133,200	(54,600)
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,640,278	1,761,301
Allowance for credit losses on loans and leases	(8,026)	(12,620)	(8,750)	(6,157)
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	156,837	140,905
Allowance for credit losses on loans and leases	(4,103)	(5,871)	(1,934)	(1,262)
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	293,805	317,170
Allowance for credit losses on loans and leases	(3,209)	(3,977)	(4,180)	(3,218)
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	59,977	62,243
Allowance for credit losses on loans and leases	(4,800)	(5,190)	(4,987)	(1,060)
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,380,015	1,235,406
Allowance for credit losses on loans and leases	(83,539)	(75,315)	$ (83,569)	$ (20,648)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	5,802,692	5,960,549
Commercial \| Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,640,278	1,761,301
Commercial \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,220,652	2,289,441
Commercial \| Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	590,093	572,338
Commercial \| Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,194,832	1,196,564
Commercial \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	156,837	140,905
Commercial \| Direct Finance Equipment Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	107,100	108,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,733,797	1,614,819
Consumer \| Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	293,805	317,170
Consumer \| Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	59,977	62,243
Consumer \| Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 1,380,015	$ 1,235,406

Loans and Leases Receivable a_4

Loans and Leases Receivable and Allowance for Credit Losses - Additional Information (Detail)	Mar. 31, 2021USD ($)Commitment	Dec. 31, 2020USD ($)Commitment	Mar. 31, 2021USD ($)CommitmentLoan	Mar. 31, 2020USD ($)Loan	Dec. 31, 2019USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrued interest receivable	$ 83,186,000	$ 80,412,000	$ 83,186,000
Loans receivable	15,993,464,000	15,608,989,000	15,993,464,000
Interest income			$ 152,117,000	$ 116,080,000
Loans held for sale, average life from purchase to sale			30 days
Accrued interest reversed			$ 16,000	1,200,000
Allowance for credit losses on loans and leases	128,736,000	144,176,000	128,736,000	$ 149,283,000	$ 56,379,000
Allowance for credit loss, period decrease			15,500,000
Loans reported as TDR	16,000,000	16,100,000	$ 16,000,000
Minimum performance requirement (months)			6 months
Lease receivable, TDR	$ 0	$ 0	$ 0
Number of loans \| Loan			28	16
Number of commitments to lend additional funds (commitment) \| Commitment	0	0	0
Purchased-credit-impaired loans	$ 12,500,000	$ 13,400,000
Financing receivable sale			$ 39,534,000	$ 1,822,000
Loans pledged as collateral	6,800,000,000	8,500,000,000	$ 6,800,000,000
Troubled Debt Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Impairment modification minimum period (months)			9 months
Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans receivable	5,200,000,000		$ 5,200,000,000
Interest income			38,800,000	0
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable sale			18,931,000	0
Commercial real estate non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amount deferred, CARES Act	176,100,000		176,100,000
Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Allowance for credit losses on loans and leases	8,026,000	12,620,000	8,026,000	$ 8,750,000	$ 6,157,000
Consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amount deferred, CARES Act	13,000,000		$ 13,000,000
Forgiveness of debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan			0	0
Other Assets
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrued interest receivable	79,300,000	76,600,000	$ 79,300,000
Commercial Real Estate \| Commercial and industrial \| Collateral Dependent Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans receivable	38,800,000		38,800,000
Government-Guaranteed Collateral \| Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans pledged as collateral	$ 3,300,000,000	$ 4,600,000,000	$ 3,300,000,000

Loans and Leases Receivable a_5

Loans and Leases Receivable and Allowance for Credit Losses - Performance Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 60,574	$ 62,045
Loans and leases not past due	7,475,915	7,513,323
Total loans and leases receivable	$ 7,536,489	7,575,368
Threshold period past due	30 days
Loans receivable, PPP	$ 5,178,089	4,561,365
Purchased-credit-impaired loans	12,500	13,400
30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	24,064	21,633
60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	9,208	13,812
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	27,302	26,600
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	26,428	24,324
Loans and leases not past due	1,613,850	1,736,977
Total loans and leases receivable	1,640,278	1,761,301
Multi-family \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	8,480	4,193
Multi-family \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,245	5,224
Multi-family \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	16,703	14,907
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	9,523	6,610
Loans and leases not past due	2,211,129	2,282,831
Total loans and leases receivable	2,220,652	2,289,441
Commercial and industrial \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,086	2,257
Commercial and industrial \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	4,732	1,274
Commercial and industrial \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,705	3,079
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	4,139	4,558
Loans and leases not past due	585,954	567,780
Total loans and leases receivable	590,093	572,338
Commercial real estate owner occupied \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,920	864
Commercial real estate owner occupied \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	1,324
Commercial real estate owner occupied \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,219	2,370
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	4,525	2,416
Loans and leases not past due	1,190,307	1,194,148
Total loans and leases receivable	1,194,832	1,196,564
Commercial real estate non-owner occupied \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,169	0
Commercial real estate non-owner occupied \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	60
Commercial real estate non-owner occupied \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,356	2,356
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Loans and leases not past due	156,837	140,905
Total loans and leases receivable	156,837	140,905
Construction \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	4,073	10,323
Loans and leases not past due	289,732	306,847
Total loans and leases receivable	293,805	317,170
Residential real estate \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,514	6,640
Residential real estate \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	235	1,827
Residential real estate \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,324	1,856
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	4,191	4,142
Loans and leases not past due	55,786	58,101
Total loans and leases receivable	59,977	62,243
Manufactured housing \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,403	1,518
Manufactured housing \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	871	673
Manufactured housing \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,917	1,951
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	7,695	9,672
Loans and leases not past due	1,372,320	1,225,734
Total loans and leases receivable	1,380,015	1,235,406
Installment \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	5,492	6,161
Installment \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,125	3,430
Installment \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 78	$ 81

Loans and Leases Receivable a_6

Loans and Leases Receivable and Allowance for Credit Losses - Summary of Amortized Cost of Loans and Leases on Nonaccrual Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	$ 42,666	$ 40,862
Nonaccrual loans with related allowance	5,415	11,177
Total nonaccrual loans	48,081	52,039
Multi-family
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	20,530	18,800
Nonaccrual loans with related allowance	0	2,928
Total nonaccrual loans	20,530	21,728
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	7,282	6,384
Nonaccrual loans with related allowance	262	2,069
Total nonaccrual loans	7,544	8,453
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	3,242	3,411
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	3,242	3,411
Commercial real estate non-owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	2,259	2,356
Nonaccrual loans with related allowance	97	0
Total nonaccrual loans	2,356	2,356
Residential real estate
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	9,353	9,911
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	9,353	9,911
Manufactured housing
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,871	2,969
Total nonaccrual loans	2,871	2,969
Installment
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,185	3,211
Total nonaccrual loans	$ 2,185	$ 3,211

Loans and Leases Receivable a_7

Loans and Leases Receivable and Allowance for Credit Losses - Schedule of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 144,176	$ 56,379
Charge-offs	(14,646)	(19,140)
Recoveries	2,125	429
Provision (benefit) for credit losses on loans and leases	(2,919)	31,786
Ending balance	128,736	149,283
Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12,620	6,157
Charge-offs	(1,132)	0
Recoveries	0	0
Provision (benefit) for credit losses on loans and leases	(3,462)	422
Ending balance	8,026	8,750
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12,239	15,556
Charge-offs	(635)	(97)
Recoveries	260	54
Provision (benefit) for credit losses on loans and leases	(4,361)	2,534
Ending balance	7,503	18,806
Commercial real estate owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	9,512	2,235
Charge-offs	(142)	0
Recoveries	8	3
Provision (benefit) for credit losses on loans and leases	(3,443)	516
Ending balance	5,935	8,527
Commercial real estate non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	19,452	6,243
Charge-offs	0	(12,797)
Recoveries	10	0
Provision (benefit) for credit losses on loans and leases	(7,841)	17,166
Ending balance	11,621	18,530
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5,871	1,262
Charge-offs	0	0
Recoveries	5	3
Provision (benefit) for credit losses on loans and leases	(1,773)	767
Ending balance	4,103	1,934
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	3,977	3,218
Charge-offs	(50)	0
Recoveries	10	29
Provision (benefit) for credit losses on loans and leases	(728)	(585)
Ending balance	3,209	4,180
Manufactured housing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5,190	1,060
Charge-offs	0	0
Recoveries	0	0
Provision (benefit) for credit losses on loans and leases	(390)	125
Ending balance	4,800	4,987
Installment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	75,315	20,648
Charge-offs	(12,687)	(6,246)
Recoveries	1,832	340
Provision (benefit) for credit losses on loans and leases	19,079	10,841
Ending balance	$ 83,539	83,569
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		79,829
Cumulative Effect, Period of Adoption, Adjustment \| Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		2,171
Cumulative Effect, Period of Adoption, Adjustment \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		759
Cumulative Effect, Period of Adoption, Adjustment \| Commercial real estate owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		5,773
Cumulative Effect, Period of Adoption, Adjustment \| Commercial real estate non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		7,918
Cumulative Effect, Period of Adoption, Adjustment \| Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		(98)
Cumulative Effect, Period of Adoption, Adjustment \| Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		1,518
Cumulative Effect, Period of Adoption, Adjustment \| Manufactured housing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		3,802
Cumulative Effect, Period of Adoption, Adjustment \| Installment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		$ 57,986

Loans and Leases Receivable a_8

Loans and Leases Receivable and Allowance for Credit Losses - Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)Loan	Mar. 31, 2020USD ($)Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	28	16
Recorded investment \| $	$ 725	$ 775
Extensions of maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	0	4
Recorded investment \| $	$ 0	$ 245
Interest-rate reductions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	8	12
Recorded investment \| $	$ 184	$ 530
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	20	0
Recorded investment \| $	$ 541	$ 0

Loans and Leases Receivable a_9

Loans and Leases Receivable and Allowance for Credit Losses - Summary of Loans Modified in Troubled Debt Restructurings and Related Recorded Investment (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)Loan	Mar. 31, 2020USD ($)Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	20	6
Recorded Investment \| $	$ 354	$ 692
Manufactured housing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	3	0
Recorded Investment \| $	$ 48	$ 0
Commercial real estate owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	0	1
Recorded Investment \| $	$ 0	$ 8
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	1	5
Recorded Investment \| $	$ 56	$ 684
Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	16	0
Recorded Investment \| $	$ 250	$ 0

Loans and Leases Receivable _10

Loans and Leases Receivable and Allowance for Credit Losses - Credit Ratings (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	$ 634,369	$ 1,515,239
Fiscal year before current fiscal year	1,385,869	1,599,431
Two years before current fiscal year	1,373,910	786,506
Three years before current fiscal year	738,407	1,055,134
Four years before current fiscal year	930,852	578,390
Prior	1,606,409	1,130,969
Revolving loans amortized cost basis	866,673	909,699
Revolving loans converted to term	0	0
Total loans and leases receivable	7,536,489	7,575,368
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	5,802,692	5,960,549
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	1,733,797	1,614,819
Commercial loans and leases receivable \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	427,431	1,188,773
Fiscal year before current fiscal year	897,562	791,958
Two years before current fiscal year	756,848	663,454
Three years before current fiscal year	633,552	1,038,646
Four years before current fiscal year	918,950	538,340
Prior	1,435,161	994,535
Revolving loans amortized cost basis	733,188	744,843
Revolving loans converted to term	0	0
Total loans and leases receivable	5,802,692	5,960,549
Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	1,640,278	1,761,301
Multi-family \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	90,497	150,835
Fiscal year before current fiscal year	130,496	23,716
Two years before current fiscal year	22,678	299,319
Three years before current fiscal year	275,379	590,608
Four years before current fiscal year	488,722	245,946
Prior	632,506	450,877
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	1,640,278	1,761,301
Multi-family \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	90,497	150,835
Fiscal year before current fiscal year	130,496	23,716
Two years before current fiscal year	22,678	299,319
Three years before current fiscal year	275,379	535,510
Four years before current fiscal year	418,365	227,296
Prior	565,953	420,809
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	1,503,368	1,657,485
Multi-family \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	20,901
Four years before current fiscal year	20,279	10,394
Prior	36,870	26,708
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	57,149	58,003
Multi-family \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	34,197
Four years before current fiscal year	50,078	8,256
Prior	29,683	3,360
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	79,761	45,813
Multi-family \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year		0
Prior		0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	0	0
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	2,220,652	2,289,441
Commercial and industrial \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	291,633	752,438
Fiscal year before current fiscal year	472,653	381,057
Two years before current fiscal year	343,155	161,444
Three years before current fiscal year	158,476	122,807
Four years before current fiscal year	116,274	54,201
Prior	120,631	74,245
Revolving loans amortized cost basis	717,830	743,249
Revolving loans converted to term	0	0
Total loans and leases receivable	2,220,652	2,289,441
Commercial and industrial \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	274,698	729,270
Fiscal year before current fiscal year	448,597	373,050
Two years before current fiscal year	335,492	141,943
Three years before current fiscal year	139,864	116,793
Four years before current fiscal year	109,093	45,367
Prior	112,621	71,502
Revolving loans amortized cost basis	692,981	717,007
Revolving loans converted to term	0	0
Total loans and leases receivable	2,113,346	2,194,932
Commercial and industrial \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	16,935	13,200
Fiscal year before current fiscal year	13,200	1,117
Two years before current fiscal year	1,044	436
Three years before current fiscal year	563	113
Four years before current fiscal year	33	516
Prior	258	21
Revolving loans amortized cost basis	16,342	17,524
Revolving loans converted to term	0	0
Total loans and leases receivable	48,375	32,927
Commercial and industrial \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	9,968
Fiscal year before current fiscal year	10,856	6,890
Two years before current fiscal year	6,619	19,065
Three years before current fiscal year	18,049	5,901
Four years before current fiscal year	7,148	8,318
Prior	7,752	2,722
Revolving loans amortized cost basis	8,507	8,718
Revolving loans converted to term	0	0
Total loans and leases receivable	58,931	61,582
Commercial and industrial \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior		0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	0	0
Commercial real estate owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	590,093	572,338
Commercial real estate owner occupied \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	33,144	82,343
Fiscal year before current fiscal year	82,661	176,289
Two years before current fiscal year	174,621	82,114
Three years before current fiscal year	80,684	80,040
Four years before current fiscal year	72,811	48,741
Prior	145,500	102,070
Revolving loans amortized cost basis	672	741
Revolving loans converted to term	0	0
Total loans and leases receivable	590,093	572,338
Commercial real estate owner occupied \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	33,144	82,343
Fiscal year before current fiscal year	82,661	168,977
Two years before current fiscal year	167,487	72,615
Three years before current fiscal year	71,146	70,642
Four years before current fiscal year	61,561	46,510
Prior	133,469	91,798
Revolving loans amortized cost basis	672	741
Revolving loans converted to term	0	0
Total loans and leases receivable	550,140	533,626
Commercial real estate owner occupied \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	4,464
Two years before current fiscal year	4,286	0
Three years before current fiscal year	0	9,056
Four years before current fiscal year	11,010	0
Prior	292	555
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	15,588	14,075
Commercial real estate owner occupied \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	2,848
Two years before current fiscal year	2,848	9,499
Three years before current fiscal year	9,538	342
Four years before current fiscal year	240	2,231
Prior	11,739	9,717
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	24,365	24,637
Commercial real estate owner occupied \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	0	0
Commercial real estate non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	1,194,832	1,196,564
Commercial real estate non-owner occupied \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	11,186	183,225
Fiscal year before current fiscal year	182,074	105,430
Two years before current fiscal year	105,421	115,623
Three years before current fiscal year	114,092	245,191
Four years before current fiscal year	241,143	179,752
Prior	526,897	367,343
Revolving loans amortized cost basis	14,019	0
Revolving loans converted to term	0	0
Total loans and leases receivable	1,194,832	1,196,564
Commercial real estate non-owner occupied \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	11,186	143,231
Fiscal year before current fiscal year	120,080	105,430
Two years before current fiscal year	94,136	97,882
Three years before current fiscal year	95,355	157,835
Four years before current fiscal year	120,861	155,168
Prior	423,438	313,559
Revolving loans amortized cost basis	14,019	0
Revolving loans converted to term	0	0
Total loans and leases receivable	879,075	973,105
Commercial real estate non-owner occupied \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	39,994
Fiscal year before current fiscal year	61,994	0
Two years before current fiscal year	11,285	0
Three years before current fiscal year	996	66,745
Four years before current fiscal year	99,671	24,218
Prior	53,340	14,613
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	227,286	145,570
Commercial real estate non-owner occupied \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	17,741
Three years before current fiscal year	17,741	20,611
Four years before current fiscal year	20,611	366
Prior	50,119	39,171
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	88,471	77,889
Commercial real estate non-owner occupied \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0
Three years before current fiscal year		0
Four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	0	0
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	156,837	140,905
Construction \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	971	19,932
Fiscal year before current fiscal year	29,678	105,466
Two years before current fiscal year	110,973	4,954
Three years before current fiscal year	4,921	0
Four years before current fiscal year	0	9,700
Prior	9,627	0
Revolving loans amortized cost basis	667	853
Revolving loans converted to term	0	0
Total loans and leases receivable	156,837	140,905
Construction \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	971	19,932
Fiscal year before current fiscal year	28,168	105,466
Two years before current fiscal year	110,973	4,954
Three years before current fiscal year	4,921	0
Four years before current fiscal year	0	9,700
Prior	9,627	0
Revolving loans amortized cost basis	667	853
Revolving loans converted to term	0	0
Total loans and leases receivable	155,327	140,905
Construction \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	1,510	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	1,510	0
Construction \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	0	0
Construction \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	0	0
Consumer loans \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	206,938	326,466
Fiscal year before current fiscal year	488,307	807,473
Two years before current fiscal year	617,062	123,052
Three years before current fiscal year	104,855	16,488
Four years before current fiscal year	11,902	40,050
Prior	171,248	136,434
Revolving loans amortized cost basis	133,485	164,856
Revolving loans converted to term	0	0
Total loans and leases receivable	1,733,797	1,614,819
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	293,805	317,170
Residential real estate \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	2,573	6,708
Fiscal year before current fiscal year	11,110	13,617
Two years before current fiscal year	14,758	6,970
Three years before current fiscal year	12,966	11,635
Four years before current fiscal year	8,159	39,493
Prior	110,754	73,891
Revolving loans amortized cost basis	133,485	164,856
Revolving loans converted to term	0	0
Total loans and leases receivable	293,805	317,170
Residential real estate \| Consumer \| Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	2,573	6,708
Fiscal year before current fiscal year	11,110	13,617
Two years before current fiscal year	14,660	6,810
Three years before current fiscal year	12,060	10,850
Four years before current fiscal year	7,379	38,143
Prior	105,969	69,496
Revolving loans amortized cost basis	131,018	161,576
Revolving loans converted to term	0	0
Total loans and leases receivable	284,769	307,200
Residential real estate \| Consumer \| Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	98	160
Three years before current fiscal year	906	785
Four years before current fiscal year	780	1,350
Prior	4,785	4,395
Revolving loans amortized cost basis	2,467	3,280
Revolving loans converted to term	0	0
Total loans and leases receivable	9,036	9,970
Manufactured housing
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	59,977	62,243
Manufactured housing \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	295
Two years before current fiscal year	300	609
Three years before current fiscal year	443	76
Four years before current fiscal year	77	41
Prior	59,157	61,222
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	59,977	62,243
Manufactured housing \| Consumer \| Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	295
Two years before current fiscal year	300	609
Three years before current fiscal year	443	76
Four years before current fiscal year	77	41
Prior	54,394	56,837
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	55,214	57,858
Manufactured housing \| Consumer \| Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	4,763	4,385
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	4,763	4,385
Installment
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases receivable	1,380,015	1,235,406
Installment \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	204,365	319,758
Fiscal year before current fiscal year	477,197	793,561
Two years before current fiscal year	602,004	115,473
Three years before current fiscal year	91,446	4,777
Four years before current fiscal year	3,666	516
Prior	1,337	1,321
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	1,380,015	1,235,406
Installment \| Consumer \| Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	204,365	319,453
Fiscal year before current fiscal year	476,856	791,235
Two years before current fiscal year	599,887	114,988
Three years before current fiscal year	91,009	4,736
Four years before current fiscal year	3,633	514
Prior	1,249	1,204
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	1,376,999	1,232,130
Installment \| Consumer \| Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	305
Fiscal year before current fiscal year	341	2,326
Two years before current fiscal year	2,117	485
Three years before current fiscal year	437	41
Four years before current fiscal year	33	2
Prior	88	117
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total loans and leases receivable	$ 3,016	$ 3,276

Loans and Leases Receivable _11

Loans and Leases Receivable and Allowance for Credit Losses - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 115,849	$ 192,256
Sales	$ 39,534	$ 1,822
Purchase price as a percentage of loans outstanding	101.00%	100.60%
Net gain on sale of loans	$ 1,600	$ 11
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	495
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	115,849	191,761
Sales	0	1,822
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	18,931	0
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	2,237	0
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 18,366	$ 0

Leases - Lessee Narrative (Deta

Leases - Lessee Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Leases - Lessee Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	15 years
Operating cash flows from operating leases	$ 1.1	$ 1.3
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	5 months
Lessee, operating lease, term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	6 years
Lessee, operating lease, term	5 years

Leases - Right-of-Use Assets an

Leases - Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating lease ROU assets (1)	$ 15,442	$ 16,578
LIABILITIES
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities	us-gaap:OtherLiabilities
Operating lease liabilities (1)	$ 16,829	$ 18,005

Leases - Lease, Cost (Details)

Leases - Lease, Cost (Details) - USD ($)	3 Months Ended
Leases - Lease, Cost (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 1,117,000	$ 1,205,000
Variable lease cost	$ 0	$ 0

Leases - Maturities of Non-canc

Leases - Maturities of Non-cancelable Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Leases [Abstract]
2021	$ 3,477
2022	4,509
2023	4,031
2024	2,957
2025	1,887
Thereafter	1,465
Total minimum payments	18,326
Less: interest	1,497
Present value of lease liabilities	$ 16,829	$ 18,005

Leases - Summary of Lease Term

Leases - Summary of Lease Term and Discount Rate (Details)	Mar. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease, weighted average remaining lease term (years)	4 years 6 months	4 years 8 months 12 days
Operating lease, weighted average discount rate, percent	2.89%	2.90%

Leases - Lessor Narrative (Deta

Leases - Lessor Narrative (Details) $ in Millions	Mar. 31, 2021USD ($)
Minimum
Lessor, Lease, Description [Line Items]
Lessor, lease, term of contract (years)	24 months
Maximum
Lessor, Lease, Description [Line Items]
Lessor, lease, term of contract (years)	120 months
COVID-19 \| Finance Leases
Lessor, Lease, Description [Line Items]
Book value	$ 29.3
COVID-19 \| Operating Leases
Lessor, Lease, Description [Line Items]
Book value	$ 14.5

Leases - Lessor, Lease Receivab

Leases - Lessor, Lease Receivables and Investment in Operating Leases and their Corresponding Balance Sheet Location (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Direct financing leases
Lease receivables	$ 104,230	$ 104,982
Guaranteed residual assets	9,452	12,988
Unguaranteed residual assets	3,807	1,229
Deferred initial direct costs	528	560
Unearned income	(10,433)	(11,175)
Net investment in direct financing leases	107,584	108,584
Operating leases
Investment in operating leases	136,754	131,791
Accumulated depreciation	(33,204)	(28,919)
Deferred initial direct costs	1,113	996
Net investment in operating leases	104,663	103,868
Total lease assets	$ 212,247	$ 212,452

Borrowings - Short Term Borrowi

Borrowings - Short Term Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
FHLB advances	$ 850,000	$ 850,000
Federal funds purchased	365,000	250,000
Total short-term debt	$ 1,215,000	$ 1,100,000
FHLB advances, rate	1.21%	1.19%
Federal funds purchased, rate	0.05%	0.09%

Borrowings - Summary of Bancorp

Borrowings - Summary of Bancorps Short Term Borrowings (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
FHLB Advances
Short-term Debt [Line Items]
Maximum outstanding at any month end	$ 850,000	$ 910,000
Average balance during the period	$ 850,000	$ 809,788
Weighted-average interest rate during the period	2.48%	2.31%
Federal Funds Purchased
Short-term Debt [Line Items]
Maximum outstanding at any month end	$ 365,000	$ 842,000
Average balance during the period	$ 16,333	$ 239,481
Weighted-average interest rate during the period	0.07%	0.19%

Borrowings - Narrative (Detail)

Borrowings - Narrative (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Federal Funds Purchased
Debt Instrument [Line Items]
Aggregate availability under federal funds line	$ 1,100	$ 924

Borrowings - FHLB and FRB Advan

Borrowings - FHLB and FRB Advances (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
FRB PPP Liquidity Facility advances	$ 3,284,156	$ 4,415,016
Total long-term debt	$ 3,284,156	$ 4,415,016
FRB PPP Liquidity Facility advances, interest rate	0.35%	0.35%
Total maximum borrowing capacity with the FHLB	$ 2,492,783	$ 2,729,516
Total maximum borrowing capacity with the FRB	183,124	223,299
Qualifying loans serving as collateral against FHLB and FRB advances	3,258,271	3,363,364
Credit Facility, CARES Act
Debt Instrument [Line Items]
FRB PPP liquidity facility	3,300,000	$ 4,400,000
Maximum borrowing capacity	$ 5,200,000

Borrowings - Long-term Debt (De

Borrowings - Long-term Debt (Details) - USD ($)	3 Months Ended
Borrowings - Long-term Debt (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Amount	$ 3,284,156,000	$ 4,415,016,000
Senior Notes
Debt Instrument [Line Items]
Amount	124,138,000	124,037,000
Senior Subordinated Notes
Debt Instrument [Line Items]
Amount	181,464,000	181,394,000
Maturing September 2024 \| Senior Notes
Debt Instrument [Line Items]
Amount	$ 24,581,000	24,552,000
Rate	4.50%
Issued Amount	$ 25,000,000
Price	100.00%
Maturing June 2022 \| Senior Notes
Debt Instrument [Line Items]
Amount	$ 99,557,000	99,485,000
Rate	3.95%
Issued Amount	$ 100,000,000
Price	99.775%
Maturing December 2034 \| Senior Subordinated Notes
Debt Instrument [Line Items]
Amount	$ 72,267,000	72,222,000
Rate	5.375%
Issued Amount	$ 74,750,000
Price	100.00%
Maturing June 2029 \| Senior Subordinated Notes
Debt Instrument [Line Items]
Amount	$ 109,197,000	$ 109,172,000
Rate	6.125%
Issued Amount	$ 110,000,000
Price	100.00%
London Interbank Offered Rate (LIBOR) \| Maturing June 2029 \| Senior Subordinated Notes
Debt Instrument [Line Items]
Spread on variable interest rate	3.443%

Regulatory Capital - Summary of

Regulatory Capital - Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital (to risk weighted assets), Actual Amount	$ 1,021,018	$ 954,839
Tier 1 capital (to risk weighted assets), Actual Amount	1,238,489	1,172,310
Total capital (to risk weighted assets), Actual Amount	1,447,285	1,401,119
Tier 1 capital (to average assets), Actual Amount	$ 1,238,489	$ 1,172,310
Common equity Tier 1 (to risk weighted assets), Actual Ratio	8.774%	8.079%
Tier 1 capital (to risk weighted assets), Actual Ratio	0.10643	0.09919
Total capital (to risk weighted assets), Actual Ratio	0.12437	0.11855
Tier 1 capital (to average assets), Actual Ratio	0.08478	0.08597
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 523,659	$ 531,844
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	698,212	709,125
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	930,949	945,500
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 584,359	$ 545,485
Common equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.06000	0.06000
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.08000	0.08000
Tier 1 capital (to average assets), For Capital Adequacy Purposes Ratio	0.04000	0.04000
Common equity Tier 1 (to risk weighted assets), for Basel III amount	$ 814,581	$ 827,312
Tier 1 (to risk weighted assets) Required for Basel III amount	989,134	1,004,594
Total capital (to risk weighted assets), for Basel III amount	1,221,871	1,240,969
Tier 1 (to risk average assets), for Basel III amount	$ 584,359	$ 545,485
Common equity Tier 1 (to risk weighted assets), for Basel III ratio	7.00%	7.00%
Tier 1 capital (to risk weighted assets), for Basel III ratio	8.50%	8.50%
Total capital (to risk weighted assets), for Basel III ratio	10.50%	10.50%
Tier 1 capital (to average assets), for Basel III ratio	4.00%	4.00%
Customers Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital (to risk weighted assets), Actual Amount	$ 1,365,443	$ 1,254,082
Tier 1 capital (to risk weighted assets), Actual Amount	1,365,443	1,254,082
Total capital (to risk weighted assets), Actual Amount	1,523,681	1,424,791
Tier 1 capital (to average assets), Actual Amount	$ 1,365,443	$ 1,254,082
Common equity Tier 1 (to risk weighted assets), Actual Ratio	11.745%	10.615%
Tier 1 capital (to risk weighted assets), Actual Ratio	0.11745	0.10615
Total capital (to risk weighted assets), Actual Ratio	0.13106	0.12060
Tier 1 capital (to average assets), Actual Ratio	0.09352	0.09208
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 523,182	$ 531,639
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	697,576	708,852
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	930,102	945,136
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 584,025	$ 544,758
Common equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.06000	0.06000
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.08000	0.08000
Tier 1 capital (to average assets), For Capital Adequacy Purposes Ratio	0.04000	0.04000
Common equity Tier 1 Capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 755,708	$ 767,923
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	930,102	945,136
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	1,162,627	1,181,421
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 730,031	$ 680,947
Common equity Tier 1 (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.08000	0.08000
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.10000	0.10000
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.05000	0.05000
Common equity Tier 1 (to risk weighted assets), for Basel III amount	$ 813,839	$ 826,994
Tier 1 (to risk weighted assets) Required for Basel III amount	988,233	1,004,207
Total capital (to risk weighted assets), for Basel III amount	1,220,758	1,240,492
Tier 1 (to risk average assets), for Basel III amount	$ 584,025	$ 544,758
Common equity Tier 1 (to risk weighted assets), for Basel III ratio	7.00%	7.00%
Tier 1 capital (to risk weighted assets), for Basel III ratio	8.50%	8.50%
Total capital (to risk weighted assets), for Basel III ratio	10.50%	10.50%
Tier 1 capital (to average assets), for Basel III ratio	4.00%	4.00%

Regulatory Capital - Narrative

Regulatory Capital - Narrative (Details)	Mar. 31, 2021
Regulatory Capital [Abstract]
Capital conservation buffer to risk weighted assets	2.50%

Disclosures About Fair Value _3

Disclosures About Fair Value of Financial Instruments - Narrative (Detail)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Loans held for sale, average life from purchase to sale	30 days

Disclosures About Fair Value _4

Disclosures About Fair Value of Financial Instruments - Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	$ 515,364	$ 693,354
Cash and cash equivalents, Estimated Fair Value	515,364	693,354
Debt securities, available for sale	1,437,077	1,206,431
Equity securities	4,827	3,854
Loans held for sale	46,106	79,086
Total loans and leases receivable, net of allowance for credit losses on loans and leases	15,993,464	15,608,989
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	16,487,438	16,222,202
FHLB, Federal Reserve Bank and other restricted stock, Carrying Amount	69,420	71,368
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	69,420	71,368
Derivative assets	36,502	54,223
Deposits, Carrying Amount	12,472,440	11,309,929
Deposits, Estimated Fair Value	12,473,798	11,312,494
FRB PPP Liquidity Facility, Carrying Amount	3,284,156	4,415,016
FRB PPP Liquidity Facility, Estimated Fair Value	3,284,156	4,415,016
Federal funds purchased, Carrying Amount	365,000	250,000
Federal funds purchased, Estimated Fair Value	365,000	250,000
FHLB advances, Carrying Amount	850,000	850,000
FHLB advances, Estimated Fair Value	850,787	852,442
Other borrowings, Carrying Amount	124,138	124,037
Other borrowings, Estimated Fair Value	135,571	129,120
Subordinated debt, Carrying Amount	181,464	181,394
Subordinated debt, Estimated Fair Value	197,080	193,119
Derivative liabilities	37,536	98,164
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Estimated Fair Value	515,364	693,354
Debt securities, available for sale	0	0
Equity securities	4,827	3,854
Loans held for sale	0	0
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	0	0
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	0	0
Derivative assets	0	0
Deposits, Estimated Fair Value	11,806,559	10,657,998
FRB PPP Liquidity Facility, Estimated Fair Value	0	0
Federal funds purchased, Estimated Fair Value	365,000	250,000
FHLB advances, Estimated Fair Value	0	0
Other borrowings, Estimated Fair Value	0	0
Subordinated debt, Estimated Fair Value	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Estimated Fair Value	0	0
Debt securities, available for sale	1,437,077	1,206,431
Equity securities	0	0
Loans held for sale	45,463	78,443
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	3,407,622	3,616,432
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	69,420	71,368
Derivative assets	36,306	54,023
Deposits, Estimated Fair Value	667,239	654,496
FRB PPP Liquidity Facility, Estimated Fair Value	3,284,156	4,415,016
Federal funds purchased, Estimated Fair Value	0	0
FHLB advances, Estimated Fair Value	850,787	852,442
Other borrowings, Estimated Fair Value	135,571	129,120
Subordinated debt, Estimated Fair Value	197,080	193,119
Derivative liabilities	37,536	98,164
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Estimated Fair Value	0	0
Debt securities, available for sale	0	0
Equity securities	0	0
Loans held for sale	643	643
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	13,079,816	12,605,770
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	0	0
Derivative assets	196	200
Deposits, Estimated Fair Value	0	0
FRB PPP Liquidity Facility, Estimated Fair Value	0	0
Federal funds purchased, Estimated Fair Value	0	0
FHLB advances, Estimated Fair Value	0	0
Other borrowings, Estimated Fair Value	0	0
Subordinated debt, Estimated Fair Value	0	0
Derivative liabilities	$ 0	$ 0

Disclosures About Fair Value _5

Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	$ 4,887,233	$ 4,886,449
Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	51,624	76,836
Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	4,827
Derivative assets \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	36,502	54,223
Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	1,205	5,509
Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	44,258	55,683
Loans receivable, mortgage warehouse – fair value option \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	3,407,622	3,616,432
Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial Liabilities Fair Value Disclosure	37,536	98,164
Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	7,331	21,118
Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	35	35
Available-for-sale Securities \| Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	386,993	377,145
Available-for-sale Securities \| U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	20,053	20,034
Available-for-sale Securities \| Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	37,634	63,091
Available-for-sale Securities \| Agency-guaranteed collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	211,104	161,767
Available-for-sale Securities \| Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	13,059
Available-for-sale Securities \| Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	163,094	32,367
Available-for-sale Securities \| Corporate notes \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	257,924	396,744
Available-for-sale Securities \| Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	328,689	136,992
Available-for-sale Securities \| State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	18,527	18,291
Available-for-sale Securities \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure		3,854
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	4,827	3,854
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	4,827
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Derivative assets \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Loans receivable, mortgage warehouse – fair value option \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial Liabilities Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Agency-guaranteed collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Corporate notes \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Available-for-sale Securities \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure		3,854
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	4,882,210	4,882,395
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	44,258	72,934
Significant Other Observable Inputs (Level 2) \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0
Significant Other Observable Inputs (Level 2) \| Derivative assets \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	36,306	54,023
Significant Other Observable Inputs (Level 2) \| Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	1,205	5,509
Significant Other Observable Inputs (Level 2) \| Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	44,258	55,683
Significant Other Observable Inputs (Level 2) \| Loans receivable, mortgage warehouse – fair value option \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	3,407,622	3,616,432
Significant Other Observable Inputs (Level 2) \| Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial Liabilities Fair Value Disclosure	37,536	98,164
Significant Other Observable Inputs (Level 2) \| Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	0	17,251
Significant Other Observable Inputs (Level 2) \| Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	386,993	377,145
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	20,053	20,034
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	37,634	63,091
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Agency-guaranteed collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	211,104	161,767
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	13,059
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	163,094	32,367
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Corporate notes \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	257,924	396,744
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	328,689	136,992
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	18,527	18,291
Significant Other Observable Inputs (Level 2) \| Available-for-sale Securities \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure		0
Significant Unobservable Inputs (Level 3) \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	196	200
Significant Unobservable Inputs (Level 3) \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	7,366	3,902
Significant Unobservable Inputs (Level 3) \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0
Significant Unobservable Inputs (Level 3) \| Derivative assets \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	196	200
Significant Unobservable Inputs (Level 3) \| Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Loans receivable, mortgage warehouse – fair value option \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial Liabilities Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	7,331	3,867
Significant Unobservable Inputs (Level 3) \| Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, Fair Value Disclosure	35	35
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Agency-guaranteed collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Corporate notes \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure	$ 0	0
Significant Unobservable Inputs (Level 3) \| Available-for-sale Securities \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, Fair Value Disclosure		$ 0

Disclosures About Fair Value _6

Disclosures About Fair Value of Financial Instruments - Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Detail) - Significant Unobservable Inputs (Level 3) - Residential Mortgage Loan Commitments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 200	$ 79
Issuances	196	215
Settlements	(200)	(79)
Balance at end of period	$ 196	$ 215

Disclosures About Fair Value _7

Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Other real estate owned \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range		9.00%
Residential mortgage loan commitments \| Adjusted market bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments pull through rate	81.00%	78.00%
Fair Value Estimate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned		$ 35
Residential mortgage loan commitments	$ 196	$ 200
Minimum \| Other real estate owned \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range		8.00%
Minimum \| Residential mortgage loan commitments \| Adjusted market bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments pull through rate	81.00%	78.00%
Maximum \| Other real estate owned \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range		9.00%
Maximum \| Residential mortgage loan commitments \| Adjusted market bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments pull through rate	81.00%	78.00%
Real Estate \| Collateral-dependent loans \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	12.00%	8.00%
Real Estate \| Fair Value Estimate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	$ 6,778	$ 2,928
Real Estate \| Minimum \| Collateral-dependent loans \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	8.00%	8.00%
Real Estate \| Maximum \| Collateral-dependent loans \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	20.00%	8.00%
Commercial and industrial \| Collateral-dependent loans \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	8.00%	8.00%
Commercial and industrial \| Collateral-dependent loans \| Business asset valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	40.00%	60.00%
Commercial and industrial \| Fair Value Estimate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	$ 553	$ 939
Commercial and industrial \| Minimum \| Collateral-dependent loans \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	7.00%	7.00%
Commercial and industrial \| Minimum \| Collateral-dependent loans \| Business asset valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	40.00%	60.00%
Commercial and industrial \| Maximum \| Collateral-dependent loans \| Collateral appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	8.00%	8.00%
Commercial and industrial \| Maximum \| Collateral-dependent loans \| Business asset valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	40.00%	60.00%

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2021USD ($)derivative	Mar. 31, 2021USD ($)derivative	Dec. 31, 2020USD ($)derivative
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification of realized losses from AOCI, discontinuation of cash flow hedge	$ 25,900
Length of hedging exposure to variability in future cash flows (months)		24 months
Losses expected to be reclassified from AOCI during the next 12 months		$ 1,100
Derivative, net liability position, aggregate fair value	36,400	$ 36,400
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period		30 days
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period		60 days
Not Designated as Hedging Instrument \| Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	8,800	$ 8,800	$ 11,900
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral pledged	$ 35,017	$ 35,017	$ 97,641
Interest Rate Contract \| Derivative Designated as Hedging Instrument \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Number of outstanding interest rate derivatives \| derivative	1	1	5
Aggregate notional amount	$ 225,000	$ 225,000	$ 1,100,000
Number of interest rate derivatives terminated \| derivative	4
Aggregate notional amount terminated	$ 850,000	$ 850,000
Interest Rate Contract \| Derivative Designated as Hedging Instrument \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Number of outstanding interest rate derivatives \| derivative	17	17	24
Aggregate notional amount	$ 85,500	$ 85,500	$ 272,300
Number of interest rate derivatives terminated \| derivative	7
Aggregate notional amount, terminated	$ 186,800	186,800
Interest Rate Swap \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 1,500,000	$ 1,500,000	$ 1,400,000
Number of derivative instruments held \| derivative	161	161	155
Interest Rate Cap \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 206,100	$ 206,100	$ 204,900
Number of derivative instruments held \| derivative	12,000	12,000	12,000
Credit Contract \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 173,600	$ 173,600	$ 177,200

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Cumulative Basis Adjustment for Fair Value Hedges (Detail) - Available-for-sale Securities - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	$ 85,500	$ 272,159
Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items	$ 976	$ 741

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Other Assets \| Derivative Designated as Hedging Instrument \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	$ 0	$ 196
Other Assets \| Derivative Designated as Hedging Instrument \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	976	0
Other Assets \| Derivative Designated as Hedging Instrument \| Interest Rate Swap \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	0	196
Other Assets \| Derivative Designated as Hedging Instrument \| Interest Rate Swap \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	976	0
Other Assets \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	35,526	54,027
Other Assets \| Not Designated as Hedging Instrument \| Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	196	200
Other Assets \| Not Designated as Hedging Instrument \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	34,962	53,455
Other Assets \| Not Designated as Hedging Instrument \| Interest Rate Cap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	166	46
Other Assets \| Not Designated as Hedging Instrument \| Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	202	326
Other Liabilities \| Derivative Designated as Hedging Instrument \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	1,034	40,765
Other Liabilities \| Derivative Designated as Hedging Instrument \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	0	741
Other Liabilities \| Derivative Designated as Hedging Instrument \| Interest Rate Swap \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	1,034	40,765
Other Liabilities \| Derivative Designated as Hedging Instrument \| Interest Rate Swap \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	0	741
Other Liabilities \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	36,502	56,658
Other Liabilities \| Not Designated as Hedging Instrument \| Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	0	0
Other Liabilities \| Not Designated as Hedging Instrument \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	36,154	56,209
Other Liabilities \| Not Designated as Hedging Instrument \| Interest Rate Cap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	166	46
Other Liabilities \| Not Designated as Hedging Instrument \| Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	$ 182	$ 403

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Effect of Derivative Financial Instruments on Net Income and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	$ 9,113	$ (20,346)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(25,926)	(1,478)
Other non-interest income \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	0	0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(24,467)	0
Interest expense \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	9,113	(20,346)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(1,459)	(1,478)
Derivative Designated as Hedging Instrument \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	0	0
Derivative Designated as Hedging Instrument \| Net interest income \| Interest Rate Swap \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	4,907	0
Derivative Designated as Hedging Instrument \| Net interest income \| Available-for-sale Securities \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	(4,907)	0
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	2,532	(1,010)
Not Designated as Hedging Instrument \| Other non-interest income \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	2,399	(1,015)
Not Designated as Hedging Instrument \| Other non-interest income \| Interest Rate Cap
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	0	0
Not Designated as Hedging Instrument \| Other non-interest income \| Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	137	(132)
Not Designated as Hedging Instrument \| Mortgage banking income \| Residential Mortgage Loan Commitments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	$ (4)	$ 137

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Assets and Derivative Assets (Detail) - Interest Rate Contract - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	$ 98	$ 199
Gross amounts not offset in the consolidated balance sheet, Financial instruments	0	0
Gross amounts not offset in the consolidated balance sheet, Cash collateral received	0	0
Gross amounts not offset in the consolidated balance sheet, Net amount	$ 98	$ 199

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Liabilities and Derivative Liabilities (Detail) - Interest Rate Contract - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	$ 35,017	$ 97,641
Gross amounts not offset in the consolidated balance sheet, Financial instruments	0	0
Gross amounts not offset in the consolidated balance sheet, Cash collateral pledged	(35,017)	(97,641)
Gross amounts not offset in the consolidated balance sheet, Net amount	$ 0	$ 0

Loss Contingencies - Narrative

Loss Contingencies - Narrative (Details) - USD ($) $ in Millions	Oct. 28, 2020	Apr. 27, 2020	Jun. 21, 2019	Sep. 30, 2018	Mar. 31, 2020	Sep. 30, 2019	Dec. 31, 2016
Bureau of the Fiscal Service
Loss Contingencies [Line Items]
Loss contingency, damages sought, value			$ 5.4
United States Department of Education Matter
Loss Contingencies [Line Items]
Loss contingency, damages sought, value				$ 6.5
Litigation settlement, amount awarded to other party		$ 3
Legal reserve					$ 1	$ 1
Specialty's Cafe Bakery, Inc. Matter
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 8.1
Higher One \| United States Department of Education Matter
Loss Contingencies [Line Items]
Escrow deposit							$ 1

Uncategorized Items - cubi-2021

Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member