Customers Bancorp (CUBI) 10-Q8 Nov 212021 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2021	Nov. 05, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
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		32,412,378
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001488813
Current Fiscal Year End Date	--12-31
Voting Common Stock, par value $1.00 per share
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 E, par value $1.00 per share
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
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
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	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 51,169	$ 78,090
Interest earning deposits	1,000,885	615,264
Cash and cash equivalents	1,052,054	693,354
Investment securities, at fair value	1,866,697	1,210,285
Loans held for sale (includes $12,159 and $5,509, respectively, at fair value)	29,957	79,086
Loans receivable, mortgage warehouse, at fair value	2,557,624	3,616,432
Loans receivable, PPP	4,957,357	4,561,365
Loans and leases receivable	7,970,599	7,575,368
Allowance for credit losses on loans and leases	(131,496)	(144,176)
Total loans and leases receivable, net of allowance for credit losses on loans and leases	15,354,084	15,608,989
FHLB, Federal Reserve Bank, and other restricted stock	57,184	71,368
Accrued interest receivable	93,514	80,412
Bank premises and equipment, net	9,944	11,225
Bank-owned life insurance	331,423	280,067
Goodwill and other intangibles	3,794	3,969
Other assets	310,271	338,438
Assets of discontinued operations	0	62,055
Total assets	19,108,922	18,439,248
Deposits:
Demand, non-interest bearing	4,954,331	2,356,998
Interest bearing	12,016,694	8,952,931
Total deposits	16,971,025	11,309,929
Federal funds purchased	0	250,000
FHLB advances	0	850,000
Other borrowings	223,151	124,037
Subordinated debt	181,603	181,394
FRB PPP liquidity facility	0	4,415,016
Accrued interest payable and other liabilities	448,844	152,082
Liabilities of discontinued operations	0	39,704
Total liabilities	17,824,623	17,322,162
Commitments and contingencies (NOTE 15)
Shareholders’ equity:
Preferred stock, par value $1.00 per share; liquidation preference $25.00 per share; 100,000,000 shares authorized, 5,700,000 and 9,000,000 shares issued as of September 30, 2021 and December 31, 2020; 5,700,000 and 9,000,000 shares outstanding as of September 30, 2021 and December 31, 2020;	137,794	217,471
Common stock, par value $1.00 per share; 200,000,000 shares authorized; 33,818,595 and 32,985,707 shares issued as of September 30, 2021 and December 31, 2020; 32,537,976 and 31,705,088 shares outstanding as of September 30, 2021 and December 31, 2020	33,818	32,986
Additional paid in capital	525,894	455,592
Retained earnings	607,085	438,581
Accumulated other comprehensive income (loss), net	1,488	(5,764)
Treasury stock, at cost (1,280,619 shares as of September 30, 2021 and December 31, 2020)	(21,780)	(21,780)
Total shareholders’ equity	1,284,299	1,117,086
Total liabilities and shareholders’ equity	$ 19,108,922	$ 18,439,248

Consolidated Balance Sheet - _2

Consolidated Balance Sheet - Unaudited (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Loans held for sale at fair value	$ 12,159	$ 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)	5,700,000	9,000,000
Preferred stock, shares outstanding (shares)	5,700,000	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)	33,818,595	32,985,707
Common stock, shares outstanding (shares)	32,537,976	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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income:
Loans and leases	$ 233,097	$ 132,107	$ 538,822	$ 366,634
Investment securities	8,905	6,297	25,211	17,429
Other	849	1,246	2,814	6,149
Total interest income	242,851	139,650	566,847	390,212
Interest expense:
Deposits	15,915	18,347	47,226	75,939
FHLB advances	5	5,762	6,160	15,889
Subordinated debt	2,689	2,689	8,067	8,066
FRB PPP liquidity facility, federal funds purchased and other borrowings	4,350	5,413	14,014	9,576
Total interest expense	22,959	32,211	75,467	109,470
Net interest income	219,892	107,439	491,380	280,742
Provision for credit losses on loans and leases	13,164	12,955	13,536	65,688
Net interest income after provision for credit losses on loans and leases	206,728	94,484	477,844	215,054
Non-interest income:
Commercial lease income	5,213	4,510	15,729	13,286
Bank-owned life insurance	1,988	1,746	6,432	5,265
Mortgage warehouse transactional fees	3,100	3,320	10,612	7,854
Gain (loss) on sale of SBA and other loans	5,359	286	8,834	320
Mortgage banking income	425	1,013	1,274	1,347
Gain (loss) on sale of investment securities	6,063	11,707	31,441	20,035
Unrealized gain (loss) on investment securities	0	238	2,720	60
Loss on sale of foreign subsidiaries	0	0	(2,840)	0
Unrealized gain (loss) on derivatives	524	549	2,622	(4,755)
Loss on cash flow hedge derivative terminations	0	0	(24,467)	0
Other	1,837	753	5,519	2,066
Total non-interest income	25,586	24,864	60,876	47,736
Non-interest expense:
Salaries and employee benefits	26,268	24,752	78,262	68,467
Technology, communication and bank operations	21,281	13,005	60,887	34,647
Professional services	8,249	4,421	22,772	10,939
Occupancy	2,704	3,368	7,807	8,620
Commercial lease depreciation	4,493	3,663	13,199	10,733
FDIC assessments, non-income taxes and regulatory fees	2,313	3,784	7,634	9,019
Merger and acquisition related expenses	0	658	418	658
Loan workout	198	846	39	3,020
Advertising and promotion	302	0	1,176	1,795
Deposit relationship adjustment fees	6,216	0	6,216	0
Other	7,985	1,788	14,349	7,145
Total non-interest expense	80,009	56,285	212,759	155,043
Income before income tax expense	152,305	63,063	325,961	107,747
Income tax expense	36,263	12,016	73,947	23,270
Net income from continuing operations	116,042	51,047	252,014	84,477
Loss from discontinued operations before income taxes	0	(347)	(20,354)	(10,259)
Income tax expense (benefit) from discontinued operations	0	185	17,682	(2,114)
Net loss from discontinued operations	0	(532)	(38,036)	(8,145)
Net income	116,042	50,515	213,978	76,332
Preferred stock dividends	2,981	3,430	9,671	10,626
Loss on redemption of preferred stock	2,820	0	2,820	0
Net income available to common shareholders	$ 110,241	$ 47,085	$ 201,487	$ 65,706
Basic earnings per common share from continuing operations (usd per share)	$ 3.40	$ 1.51	$ 7.44	$ 2.35
Basic earnings per common share (usd per share)	3.40	1.49	6.26	2.09
Diluted earnings per common share from continuing operations (usd per share)	3.25	1.50	7.15	2.33
Diluted earnings per common share (usd per share)	$ 3.25	$ 1.48	$ 6.02	$ 2.07
Interchange and card revenue
Non-interest income:
Non-interest income	$ 83	$ 92	$ 252	$ 555
Deposit fees
Non-interest income:
Non-interest income	$ 994	$ 650	$ 2,748	$ 1,703

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 116,042	$ 50,515	$ 213,978	$ 76,332
Unrealized gains (losses) on available for sale debt securities:
Unrealized gains (losses) arising during the period	958	(1,090)	1,950	25,127
Income tax effect	(249)	283	(507)	(6,533)
Reclassification adjustments for (gains) losses included in net income	(6,063)	(11,707)	(31,441)	(20,035)
Income tax effect	1,576	3,044	8,174	5,209
Net unrealized gains (losses) on available for sale debt securities	(3,778)	(9,470)	(21,824)	3,768
Unrealized gains (losses) on cash flow hedges:
Unrealized gains (losses) arising during the period	0	580	12,321	(33,486)
Income tax effect	0	(151)	(3,204)	8,884
Reclassification adjustment for (gains) losses included in net income	0	4,400	26,972	8,596
Income tax effect	0	(1,145)	(7,013)	(2,263)
Net unrealized gains (losses) on cash flow hedges	0	3,684	29,076	(18,269)
Other comprehensive income (loss), net of income tax effect	(3,778)	(5,786)	7,252	(14,501)
Comprehensive income (loss)	$ 112,264	$ 44,729	$ 221,230	$ 61,831

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		76,332					76,332
Other comprehensive income (loss)		(14,501)							(14,501)
Preferred stock dividends	[1]	(10,626)					(10,626)
Share-based compensation expense		8,855				8,855
Issuance of common stock under share-based compensation arrangements (shares)					218,333
Issuance of common stock under share-based compensation arrangements		111			$ 219	(108)
Ending balance, preferred stock (shares) at Sep. 30, 2020				9,000,000
Ending balance, common stock (shares) at Sep. 30, 2020					31,555,124
Ending balance at Sep. 30, 2020		1,051,491		$ 217,471	$ 32,836	452,965	385,750		(15,751)	(21,780)
Beginning balance, preferred stock (shares) at Jun. 30, 2020				9,000,000
Beginning balance, common stock (shares) at Jun. 30, 2020					31,510,287
Beginning balance at Jun. 30, 2020		1,007,847		$ 217,471	$ 32,791	450,665	338,665		(9,965)	(21,780)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		50,515					50,515
Other comprehensive income (loss)		(5,786)							(5,786)
Preferred stock dividends	[2]	(3,430)					(3,430)
Share-based compensation expense		2,028				2,028
Issuance of common stock under share-based compensation arrangements (shares)					44,837
Issuance of common stock under share-based compensation arrangements		317			$ 45	272
Ending balance, preferred stock (shares) at Sep. 30, 2020				9,000,000
Ending balance, common stock (shares) at Sep. 30, 2020					31,555,124
Ending balance at Sep. 30, 2020		$ 1,051,491		$ 217,471	$ 32,836	452,965	385,750		(15,751)	(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		213,978					213,978
Other comprehensive income (loss)		7,252							7,252
Preferred stock dividends	[1],[3]	(9,671)					(9,671)
Redemption of preferred stock (shares)	[4]			(3,300,000)
Redemption of preferred stock	[4]	(79,677)		$ (79,677)
Loss on redemption of preferred stock		(2,820)					(2,820)
Sale of non-controlling interest in BMT	[5]	31,893				31,893
Distribution of investment in BM Technologies	[6]	(32,983)					(32,983)
Restricted stock awards to certain BMT team members	[7]	19,592				19,592
Share-based compensation expense		11,162				11,162
Issuance of common stock under share-based compensation arrangements (shares)					832,888
Issuance of common stock under share-based compensation arrangements		$ 8,487			$ 832	7,655
Ending balance, preferred stock (shares) at Sep. 30, 2021		5,700,000		5,700,000
Ending balance, common stock (shares) at Sep. 30, 2021		32,537,976			32,537,976
Ending balance at Sep. 30, 2021		$ 1,284,299		$ 137,794	$ 33,818	525,894	607,085		1,488	(21,780)
Beginning balance, preferred stock (shares) at Jun. 30, 2021				9,000,000
Beginning balance, common stock (shares) at Jun. 30, 2021					32,353,256
Beginning balance at Jun. 30, 2021		1,250,729		$ 217,471	$ 33,634	519,294	496,844		5,266	(21,780)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		116,042					116,042
Other comprehensive income (loss)		(3,778)							(3,778)
Preferred stock dividends	[2],[4]	(2,981)					(2,981)
Redemption of preferred stock (shares)	[4]			(3,300,000)
Redemption of preferred stock	[4]	(79,677)		$ (79,677)
Loss on redemption of preferred stock		(2,820)					(2,820)
Share-based compensation expense		3,289				3,289
Issuance of common stock under share-based compensation arrangements (shares)					184,720
Issuance of common stock under share-based compensation arrangements		$ 3,495			$ 184	3,311
Ending balance, preferred stock (shares) at Sep. 30, 2021		5,700,000		5,700,000
Ending balance, common stock (shares) at Sep. 30, 2021		32,537,976			32,537,976
Ending balance at Sep. 30, 2021		$ 1,284,299		$ 137,794	$ 33,818	$ 525,894	$ 607,085		$ 1,488	$ (21,780)

[1]	Dividends per share of $1.041346, $1.075982, $1.142234, and $1.125 per share were declared on Series C, D, E, and F preferred stock for the nine months ended September 30, 2021. Dividends per share of $1.232778, $1.21875, $1.209375, and $1.125 per share were declared on Series C, D, E, and F preferred stock for the nine months ended September 30, 2020.
[2]	Dividends per share of $0.346206, $0.332790, $0.335984, and $0.375 per share were declared on Series C, D, E, and F preferred stock for the three months ended September 30, 2021. Dividends per share of $0.357778, $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 September 30, 2020.
[3]	Refer to NOTE 11 – SHAREHOLDERS' EQUITY for additional information about the redemption of Series C and Series D Preferred Stock.
[4]	Refer to NOTE 11 – SHAREHOLDERS' EQUITY for additional information about the redemption of Series C and Series D Preferred Stock.
[5]	Refer to NOTE 3 – DISCONTINUED OPERATIONS for additional information about the sale of non-controlling interest in BMT including the reverse recapitalization of MFAC.
[6]	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.
[7]	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	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities
Net income from continuing operations	$ 252,014	$ 84,477
Adjustments to reconcile net income to net cash provided by continuing operating activities:
Provision for credit losses on loans and leases	13,536	65,688
Depreciation and amortization	16,221	13,491
Share-based compensation expense	11,194	9,474
Deferred taxes	7,051	(26,188)
Net amortization (accretion) of investment securities premiums and discounts	1,171	(449)
Unrealized (gain) loss on investment securities	(2,720)	(60)
(Gain) loss on sale of investment securities	(31,441)	(20,035)
Loss on sale of foreign subsidiaries	2,840	0
Unrealized gain (loss) on derivatives	(2,622)	4,755
Loss on cash flow hedge derivative terminations	24,467	0
Settlement of terminated cash flow hedge derivatives	(27,156)	0
(Gain) loss on sale of leased assets under lessor operating leases	763	0
Fair value adjustment on loans held for sale	(1,115)	0
(Gain) loss on sale of loans	(10,067)	194
Origination of loans held for sale	(55,093)	(50,941)
Proceeds from the sale of loans held for sale	49,674	47,009
Amortization (accretion) of loan net deferred fees, discounts and premiums	(149,647)	(2,106)
Earnings on investment in bank-owned life insurance	(6,432)	(5,265)
(Increase) decrease in accrued interest receivable and other assets	45,591	(123,609)
Increase (decrease) in accrued interest payable and other liabilities	136,295	77,355
Net Cash Provided By Continuing Operating Activities	274,524	73,790
Cash Flows from Investing Activities
Proceeds from maturities, calls and principal repayments of investment securities	258,418	156,759
Proceeds from sales of foreign subsidiaries	3,765	0
Proceeds from sales of investment securities available for sale	666,023	377,767
Purchases of investment securities available for sale	(1,423,959)	(1,024,345)
Origination of mortgage warehouse loans	(44,292,416)	(41,764,787)
Proceeds from repayments of mortgage warehouse loans	45,356,500	40,106,032
Net (increase) decrease in loans and leases, excluding mortgage warehouse loans	521,323	(4,733,097)
Proceeds from sales of loans and leases	260,851	23,390
Purchase of loans	(1,389,512)	(226,498)
Purchases of bank-owned life insurance	(46,462)	0
Proceeds from bank-owned life insurance	1,999	0
Net proceeds from sale of (purchases of) FHLB, Federal Reserve Bank, and other restricted stock	14,184	13,827
Purchases of bank premises and equipment	(418)	(4,182)
Proceeds from sales of other real estate owned	45	77
Proceeds from sales of leased assets under lessor operating leases	5,475	0
Purchases of leased assets under lessor operating leases	(16,691)	(11,432)
Net Cash Used In Continuing Investing Activities	(80,875)	(7,086,489)
Cash Flows from Financing Activities
Net increase in deposits	5,661,096	2,190,141
Net increase (decrease) in short-term borrowed funds from the FHLB	(850,000)	0
Net increase (decrease) in federal funds purchased	(250,000)	142,000
Net increase (decrease) in borrowed funds from FRB PPP liquidity facility	(4,415,016)	4,811,009
Proceeds from issuance of other long-term borrowings	98,799	0
Redemption of preferred stock	(82,497)	0
Preferred stock dividends paid	(8,794)	(10,661)
Payments of employee taxes withheld from share-based awards	(4,201)	(1,143)
Proceeds from issuance of common stock	11,660	635
Proceeds from sale of non-controlling interest in BMT	26,795	0
Net Cash Provided By Continuing Financing Activities	187,842	7,131,981
Net Increase (Decrease) in Cash and Cash Equivalents From Continuing Operations	381,491	119,282
Discontinued Operations:
Net Cash Used In Operating Activities	(22,791)	(423)
Net Cash Provided By Investing Activities	0	52
Net Increase (Decrease) in Cash and Cash Equivalents From Discontinued Operations	(22,791)	(371)
Net Increase (Decrease) in Cash and Cash Equivalents	358,700	118,911
Cash and Cash Equivalents – Beginning	693,354	212,505
Cash and Cash Equivalents – Ending	1,052,054	331,416
Non-cash Investing and Financing 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	17,155	18,336
Transfer of loans held for sale to held for investment	55,684	0
Unsettled purchases of investment securities	160,000	22,500
Transfer of multi-family loans held for sale to held for investment	$ 0	$ 401,144

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity - Unaudited (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Special dividend (shares)			0.15389
Series C Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.346206	$ 0.357778	$ 1.041346	$ 1.232778
Series D Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.332790	0.40625	1.075982	1.21875
Series E Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.335984	0.403125	1.142234	1.209375
Series F Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.375	$ 0.375	$ 1.125	$ 1.125

Description of the Business

Description of the Business	9 Months Ended
Description of the Business	Sep. 30, 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); Harrisburg, Pennsylvania (Dauphin County); 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; Dallas, Texas; Orlando, Florida; Wilmington, North Carolina; 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; Orlando, Florida and Wilmington, North Carolina. 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 made certain equity investments through its wholly owned subsidiaries CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd., which were sold in June 2021. See NOTE 6 – INVESTMENT SECURITIES for additional information.

Significant Accounting Policies

Significant Accounting Policies and Basis of Presentation	9 Months Ended
Significant Accounting Policies and Basis of Presentation	Sep. 30, 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 and nine months ended September 30, 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 including the temporary relief from the accounting and disclosure requirements for TDRs until January 1, 2022. 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 September 30, 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, which are not expected to have a material impact on Customers' financial condition, results of operations and consolidated financial statements. 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 September 30, 2021, Customers has not yet elected to apply optional expedients for certain contract modifications. We plan to elect additional optional expedients in the future, which are not expected to have a material impact on Customers' financial condition, results of operations and consolidated financial statements.

Discontinued Operations

Discontinued Operations	9 Months Ended
Discontinued Operations	Sep. 30, 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. Customers received cash consideration of $23.1 million upon closing of the divestiture and $3.7 million of additional cash consideration in May 2021. Upon closing of the divestiture, the 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 Nine Months Ended (amounts in thousands) 2021 2020 2021 2020 Discontinued operations: Non-interest income $ — $ 16,365 $ — $ 48,691 Non-interest expense — 16,712 20,354 58,950 Loss from discontinued operations before income taxes — (347) (20,354) (10,259) Income tax expense (benefit) — 185 17,682 (2,114) Net loss from discontinued operations $ — $ (532) $ (38,036) $ (8,145) 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	9 Months Ended
Earnings (Loss) Per Share	Sep. 30, 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 Nine Months Ended (amounts in thousands, except share and per share data) 2021 2020 2021 2020 Net income from continuing operations available to common shareholders $ 110,241 $ 47,617 $ 239,523 $ 73,851 Net loss from discontinued operations — (532) (38,036) (8,145) Net income available to common shareholders $ 110,241 $ 47,085 $ 201,487 $ 65,706 Weighted-average number of common shares outstanding – basic 32,449,853 31,517,504 32,206,547 31,462,284 Share-based compensation plans 1,418,700 218,807 1,281,125 203,743 Weighted-average number of common shares – diluted 33,868,553 31,736,311 33,487,672 31,666,027 Basic earnings (loss) per common share from continuing operations $ 3.40 $ 1.51 $ 7.44 $ 2.35 Basic earnings (loss) per common share from discontinued operations — (0.02) (1.18) (0.26) Basic earnings (loss) per common share 3.40 1.49 6.26 2.09 Diluted earnings (loss) per common share from continuing operations $ 3.25 $ 1.50 $ 7.15 $ 2.33 Diluted earnings (loss) per common share from discontinued operations — (0.02) (1.13) (0.26) Diluted earnings (loss) per common share 3.25 1.48 6.02 2.07 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 Nine Months Ended 2021 2020 2021 2020 Share-based compensation awards 710,000 862,417 711,000 862,417

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) By Component	9 Months Ended
	Sep. 30, 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 and nine months ended September 30, 2021 and 2020. Amounts in parentheses indicate reductions to AOCI. Three Months Ended September 30, 2021 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - June 30, 2021 $ 5,266 $ — $ 5,266 Unrealized gains (losses) arising during period, before tax 958 — 958 Income tax effect (249) — (249) Other comprehensive income (loss) before reclassifications 709 — 709 Reclassification adjustments for (gains) losses included in net income, before tax (6,063) — (6,063) Income tax effect 1,576 — 1,576 Amounts reclassified from accumulated other comprehensive income (loss) to net income (4,487) — (4,487) Net current-period other comprehensive income (loss) (3,778) — (3,778) Balance - September 30, 2021 $ 1,488 $ — $ 1,488 Three Months Ended September 30, 2020 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - June 30, 2020 $ 27,525 $ (37,490) $ (9,965) Unrealized gains (losses) arising during period, before tax (1,090) 580 (510) Income tax effect 283 (151) 132 Other comprehensive income (loss) before reclassifications (807) 429 (378) Reclassification adjustments for (gains) losses included in net income, before tax (11,707) 4,400 (7,307) Income tax effect 3,044 (1,145) 1,899 Amounts reclassified from accumulated other comprehensive income (loss) to net income (8,663) 3,255 (5,408) Net current-period other comprehensive income (loss) (9,470) 3,684 (5,786) Balance - September 30, 2020 $ 18,055 $ (33,806) $ (15,751) (1) Reclassification amounts for AFS debt securities are reported as gain (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. Nine Months Ended September 30, 2021 (amounts in thousands) Unrealized Gains (Losses) 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 1,950 12,321 14,271 Income tax effect (507) (3,204) (3,711) Other comprehensive income (loss) before reclassifications 1,443 9,117 10,560 Reclassification adjustments for (gains) losses included in net income, before tax (31,441) 26,972 (4,469) Income tax effect 8,174 (7,013) 1,161 Amounts reclassified from accumulated other comprehensive income (loss) to net income (23,267) 19,959 (3,308) Net current-period other comprehensive income (loss) (21,824) 29,076 7,252 Balance - September 30, 2021 $ 1,488 $ — $ 1,488 Nine Months Ended September 30, 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 25,127 (33,486) (8,359) Income tax effect (6,533) 8,884 2,351 Other comprehensive income (loss) before reclassifications 18,594 (24,602) (6,008) Reclassification adjustments for (gains) losses included in net income, before tax (20,035) 8,596 (11,439) Income tax effect 5,209 (2,263) 2,946 Amounts reclassified from accumulated other comprehensive income (loss) to net income (14,826) 6,333 (8,493) Net current-period other comprehensive income 3,768 (18,269) (14,501) Balance - September 30, 2020 $ 18,055 $ (33,806) $ (15,751) (1) Reclassification amounts for AFS debt securities are reported as gain (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	9 Months Ended
Investment Securities	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The amortized cost and fair value of investment securities as of September 30, 2021 and December 31, 2020 are summarized in the tables below: September 30, 2021 (1) (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 225,182 $ 400 $ (125) $ 225,457 Agency-guaranteed residential mortgage-backed securities 9,924 — (258) 9,666 Agency-guaranteed commercial mortgage-backed securities 2,184 10 — 2,194 Agency-guaranteed residential collateralized mortgage obligations 102,110 174 (90) 102,194 Agency-guaranteed commercial collateralized mortgage obligations 143,858 56 (2,106) 141,808 Collateralized loan obligations 315,501 110 (109) 315,502 Commercial mortgage-backed securities 28,035 53 — 28,088 Corporate notes (2) 437,179 4,260 (547) 440,892 Private label collateralized mortgage obligations 588,017 601 (1,377) 587,241 State and political subdivision debt securities (3) 8,539 116 — 8,655 Available for sale debt securities $ 1,860,529 $ 5,780 $ (4,612) 1,861,697 Equity securities (4) 5,000 Total investment securities, at fair value $ 1,866,697 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 residential mortgage-backed securities 61,178 1,913 — 63,091 Agency-guaranteed residential collateralized mortgage obligations 139,985 916 (60) 140,841 Agency-guaranteed commercial collateralized mortgage obligations 20,965 — (39) 20,926 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 $6.3 million and $4.2 million at September 30, 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 perpetual preferred stock issued by a domestic bank without a readily determinable fair value at September 30, 2021 and equity securities issued by a foreign entity with readily determinable fair value at December 31, 2020. No impairments or measurement adjustments have been recorded on the perpetual preferred stock since acquisition. In June 2021, Customers sold all of the outstanding shares in CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd., which held the equity securities issued by a foreign entity, for $3.8 million, and recognized $2.8 million in loss on sale of foreign subsidiaries within non-interest income on the consolidated statement of income. During the nine months ended September 30, 2021, Customers recognized $2.7 million of unrealized gains on these equity securities prior to the sale of the foreign subsidiaries. During the three and nine months ended September 30, 2020, Customers recognized unrealized gains of $0.2 million and unrealized losses of $0.1 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. Customers is involved with various entities in the normal course of its business that are deemed to be VIEs. Customers evaluates VIEs to understand the purpose and design of the entity, and its involvement in the ongoing activities of the VIE and will consolidate the VIE if it is deemed to be the primary beneficiary. Customers is deemed to be the primary beneficiary if it has (i) the power to direct the activities of the VIE that most significantly affect the VIE's economic performance and (ii) an obligation to absorb losses of the VIE, or the right to receive benefits from the VIE, that could potentially be significant to the VIE. Customers transactions with unconsolidated VIEs include sales of consumer installment loans and investments in the securities issued by the VIEs. Customers is not the primary beneficiary of the VIEs because Customers has no right to make decisions that will most significantly affect the economic performance of the VIEs. Customers' continuing involvement with the unconsolidated VIEs is not significant. Customers' continuing involvement is not considered to be significant where Customers only invests in securities issued by the VIE and was not involved in the design of the VIE or where Customers has transferred financial assets to the VIE for only cash consideration. Customers' investments in the securities issued by the VIEs are classified as AFS debt securities on the consolidated balance sheets, and represent Customers' maximum exposure to loss. Proceeds from the sale of AFS securities were $258.4 million and $666.0 million for the three and nine months ended September 30, 2021, respectively. Proceeds from the sale of AFS securities were $268.6 million and $377.8 million during the three and nine months ended September 30, 2020. Realized gains from the sale of AFS debt securities were $6.1 million and $31.4 million for the three and nine months ended September 30, 2021, respectively. Realized gains from the sale of AFS debt securities were $11.7 million and $20.0 million for the three and nine months ended September 30, 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: September 30, 2021 (amounts in thousands) Amortized Fair Due in one year or less $ 4,932 $ 5,022 Due after one year through five years 280,813 282,050 Due after five years through ten years 156,973 159,475 Due after ten years 3,000 3,000 Asset-backed securities 225,182 225,457 Collateralized loan obligations 315,501 315,502 Commercial mortgage-backed securities 28,035 28,088 Agency-guaranteed residential mortgage-backed securities 9,924 9,666 Agency-guaranteed commercial mortgage-backed securities 2,184 2,194 Agency-guaranteed residential collateralized mortgage obligations 102,110 102,194 Agency-guaranteed commercial collateralized mortgage obligations 143,858 141,808 Private label collateralized mortgage obligations 588,017 587,241 Total debt securities $ 1,860,529 $ 1,861,697 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 September 30, 2021 were as follows: September 30, 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 $ 21,800 $ (125) $ — $ — $ 21,800 $ (125) Agency-guaranteed residential mortgage-backed securities 9,666 (258) — — 9,666 (258) Agency-guaranteed commercial mortgage-backed securities — — — — — — Agency-guaranteed residential collateralized mortgage obligations 25,548 (90) — — 25,548 (90) Agency-guaranteed commercial collateralized mortgage obligations 121,156 (2,106) — — 121,156 (2,106) Collateralized loan obligations 71,508 (109) — — 71,508 (109) Corporate notes 98,662 (504) 1,957 (43) 100,619 (547) Private label collateralized mortgage obligations 138,669 (1,377) — — 138,669 (1,377) Total $ 487,009 $ (4,569) $ 1,957 $ (43) $ 488,966 $ (4,612) At September 30, 2021, there were 35 AFS debt securities with unrealized losses in the less-than-twelve-month category and one AFS debt security with unrealized loss 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 36 securities, and it is not more likely than not that Customers will be required to sell any of the 36 securities before recovery of the amortized cost basis. At December 31, 2020, there were 16 AFS debt securities in an unrealized loss position. At September 30, 2021 and December 31, 2020, Customers Bank had pledged investment securities aggregating $12.4 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.

Loans Held for Sale

Loans Held for Sale	9 Months Ended
Loans Held for Sale	Sep. 30, 2021
Receivables Held-for-sale [Abstract]
Loans Held for Sale	LOANS HELD FOR SALE The composition of loans held for sale as of September 30, 2021 and December 31, 2020 was as follows: (amounts in thousands) September 30, 2021 December 31, 2020 Commercial loans: Multi-family loans, at lower of cost or fair value $ 17,290 $ — 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 17,290 72,934 Consumer loans: Home equity conversion mortgages, at lower of cost or fair value 508 643 Residential mortgage loans, at fair value 12,159 5,509 Total consumer loans held for sale 12,667 6,152 Loans held for sale $ 29,957 $ 79,086 Total loans held for sale as of September 30, 2021 and December 31, 2020 included NPLs of $0.5 million and $18.5 million, respectively.

Loans and Leases Receivable and

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases	LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES The following table presents loans and leases receivable as of September 30, 2021 and December 31, 2020. (amounts in thousands) September 30, 2021 December 31, 2020 Loans and leases receivable, mortgage warehouse, at fair value $ 2,557,624 $ 3,616,432 Loans receivable, PPP 4,957,357 4,561,365 Loans receivable: Commercial: Multi-family 1,369,876 1,761,301 Commercial and industrial (1) 2,673,226 2,289,441 Commercial real estate owner occupied 656,044 572,338 Commercial real estate non-owner occupied 1,144,643 1,196,564 Construction 198,607 140,905 Total commercial loans and leases receivable 6,042,396 5,960,549 Consumer: Residential real estate 248,153 317,170 Manufactured housing 55,635 62,243 Installment 1,624,415 1,235,406 Total consumer loans receivable 1,928,203 1,614,819 Loans and leases receivable (2) 7,970,599 7,575,368 Allowance for credit losses on loans and leases (131,496) (144,176) Total loans and leases receivable, net of allowance for credit losses on loans and leases $ 15,354,084 $ 15,608,989 (1) Includes direct finance equipment leases of $135.8 million and $108.0 million at September 30, 2021 and December 31, 2020, respectively. (2) Includes deferred (fees) costs and unamortized (discounts) premiums, net of $(131.2) million and $(54.6) million at September 30, 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 $87.7 million and $76.6 million at September 30, 2021 and December 31, 2020, respectively, and is presented in accrued interest receivable in the consolidated balance sheet. At September 30, 2021 and December 31, 2020, there were $41.6 million and $59.5 million of individually evaluated loans that were collateral-dependent, respectively. 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 $5.0 billion and $4.6 billion of PPP loans outstanding as of September 30, 2021 and December 31, 2020, respectively, which are fully guaranteed by the SBA and earn a fixed interest rate of 1.00%. Customers recognized interest income, including origination fees, of $117.1 million and $197.1 million for the three and nine months ended September 30, 2021, respectively. Customers recognized interest income, including origination fees, of $24.3 million and $36.0 million for the three and nine months ended September 30, 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 September 30, 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 September 30, 2021 and December 31, 2020: September 30, 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 $ — $ 8,896 $ 24,132 $ 33,028 $ 1,336,848 $ 1,369,876 Commercial and industrial 1,970 2,433 6,706 11,109 2,662,117 2,673,226 Commercial real estate owner occupied — 326 1,351 1,677 654,367 656,044 Commercial real estate non-owner occupied — 12,795 2,845 15,640 1,129,003 1,144,643 Construction — — — — 198,607 198,607 Residential real estate 1,042 795 2,821 4,658 243,495 248,153 Manufactured housing 2,967 225 5,455 8,647 46,988 55,635 Installment 5,625 3,555 3,544 12,724 1,611,691 1,624,415 Total $ 11,604 $ 29,025 $ 46,854 $ 87,483 $ 7,883,116 $ 7,970,599 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 September 30, 2021 and December 31, 2020 tables exclude PPP loans of $5.0 billion and $4.6 billion, respectively, which are all current as of September 30, 2021 and December 31, 2020. (3) Includes PCD loans of $11.0 million and $13.4 million at September 30, 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. September 30, 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 $ 24,524 $ — $ 24,524 $ 18,800 $ 2,928 $ 21,728 Commercial and industrial 6,558 393 6,951 6,384 2,069 8,453 Commercial real estate owner occupied 2,412 — 2,412 3,411 — 3,411 Commercial real estate non-owner occupied 2,845 — 2,845 2,356 — 2,356 Residential real estate 7,738 — 7,738 9,911 — 9,911 Manufactured housing — 3,520 3,520 — 2,969 2,969 Installment — 3,544 3,544 — 3,211 3,211 Total $ 44,077 $ 7,457 $ 51,534 $ 40,862 $ 11,177 $ 52,039 (1) Presented at amortized cost basis. Interest income recognized on nonaccrual loans was insignificant for the three and nine months ended September 30, 2021 and 2020. Accrued interest reversed when the loans went to nonaccrual status was insignificant during the three and nine months ended September 30, 2021 and 2020, respectively. Allowance for credit losses on loans and leases The changes in the ACL on loans and leases for the three and nine months ended September 30, 2021 and 2020 are presented in the tables below. (amounts in thousands) Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended Ending Balance, $ 5,028 $ 8,127 $ 4,464 $ 7,374 $ 2,643 $ 2,299 $ 4,372 $ 91,129 $ 125,436 Charge-offs — (516) (524) (943) — (79) — (6,693) (8,755) Recoveries — 400 474 — 3 25 — 749 1,651 Provision (benefit) for credit losses (631) 2,849 (797) 944 (1,760) (333) 38 12,854 13,164 Ending Balance, $ 4,397 $ 10,860 $ 3,617 $ 7,375 $ 886 $ 1,912 $ 4,410 $ 98,039 $ 131,496 Nine Months Ended Ending Balance, $ 12,620 $ 12,239 $ 9,512 $ 19,452 $ 5,871 $ 3,977 $ 5,190 $ 75,315 $ 144,176 Charge-offs (1,132) (1,153) (666) (943) — (129) — (27,338) (31,361) Recoveries — 945 483 69 122 47 — 3,479 5,145 Provision (benefit) for credit losses (7,091) (1,171) (5,712) (11,203) (5,107) (1,983) (780) 46,583 13,536 Ending Balance, $ 4,397 $ 10,860 $ 3,617 $ 7,375 $ 886 $ 1,912 $ 4,410 $ 98,039 $ 131,496 (amounts in thousands) Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended September 30, 2020 Ending Balance, $ 14,697 $ 12,302 $ 11,405 $ 26,493 $ 5,297 $ 4,550 $ 6,014 $ 79,147 $ 159,905 Charge-offs — (2,527) (44) (10,181) — — — (9,194) (21,946) Recoveries — 2,582 — 1,258 6 17 — 784 4,647 Provision (benefit) for credit losses 329 569 (1,809) 2,630 1,120 82 (389) 10,423 12,955 Ending Balance, September 30, 2020 $ 15,026 $ 12,926 $ 9,552 $ 20,200 $ 6,423 $ 4,649 $ 5,625 $ 81,160 $ 155,561 Nine Months Ended 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 - CECL 2,171 759 5,773 7,918 (98) 1,518 3,802 57,986 79,829 Charge-offs — (2,645) (44) (25,779) — — — (23,744) (52,212) Recoveries — 2,661 5 1,258 122 72 — 1,759 5,877 Provision (benefit) for credit losses 6,698 (3,405) 1,583 30,560 5,137 (159) 763 24,511 65,688 Ending Balance, $ 15,026 $ 12,926 $ 9,552 $ 20,200 $ 6,423 $ 4,649 $ 5,625 $ 81,160 $ 155,561 At September 30, 2021, the ACL was $131.5 million, a decrease of $12.7 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 consumer installment portfolio is mainly due to loan portfolio growth. Troubled Debt Restructurings At September 30, 2021 and December 31, 2020, there were $17.0 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 September 30, 2021 and December 31, 2020, respectively. 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. 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 September 30, 2021, commercial and consumer deferments related to COVID-19 were $73.4 million and $6.7 million, respectively. At December 31, 2020, commercial and consumer deferments related to COVID-19 were $202.1 million and $16.4 million, respectively. The following table presents loans modified in a TDR by type of concession for the three and nine months ended September 30, 2021 and 2020. There were no modifications that involved forgiveness of debt for the three and nine months ended September 30, 2021 and 2020. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Extensions of maturity — $ — — $ — — $ — 6 $ 385 Interest-rate reductions 4 244 2 88 16 585 34 1,461 Other (1) 39 687 65 1,385 158 2,369 65 1,385 Total 43 $ 931 67 $ 1,473 174 $ 2,954 105 $ 3,231 (1) Other includes covenant modifications, forbearance, loans discharged under Chapter 7 bankruptcy, or other concessions. As of September 30, 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: September 30, 2021 September 30, 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Manufactured housing 2 $ 71 5 $ 201 Commercial real estate owner occupied — — 1 952 Residential real estate — — 1 95 Installment 19 231 8 126 Total loans 21 $ 302 15 $ 1,374 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 September 30, 2021 and December 31, 2020, the amortized cost basis of PCD assets amounted to $11.0 million and $13.4 million, respectively. 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 September 30, 2021 and December 31, 2020. Term Loans Amortized Cost Basis by Origination Year as of September 30, 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 $ 126,265 $ 132,433 $ 22,974 $ 232,655 $ 331,909 $ 422,484 $ — $ — $ 1,268,720 Special mention — — — 4,902 2,773 18,029 — — 25,704 Substandard — — — — 41,364 34,088 — — 75,452 Doubtful — — — — — — — — — Total multi-family loans $ 126,265 $ 132,433 $ 22,974 $ 237,557 $ 376,046 $ 474,601 $ — $ — $ 1,369,876 Commercial and industrial loans and leases: Pass $ 568,013 $ 381,413 $ 276,126 $ 94,175 $ 93,126 $ 94,554 $ 1,067,761 $ — $ 2,575,168 Special mention 19,387 3,186 5,750 5,084 — 210 13,171 — 46,788 Substandard — 10,380 7,484 12,065 7,098 7,028 7,215 — 51,270 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 587,400 $ 394,979 $ 289,360 $ 111,324 $ 100,224 $ 101,792 $ 1,088,147 $ — $ 2,673,226 Commercial real estate owner occupied loans: Pass $ 153,865 $ 83,893 $ 142,061 $ 62,723 $ 59,116 $ 114,479 $ 672 $ — $ 616,809 Special mention — — — 318 2,058 579 — — 2,955 Substandard — — 6,885 9,491 8,932 10,972 — — 36,280 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 153,865 $ 83,893 $ 148,946 $ 72,532 $ 70,106 $ 126,030 $ 672 $ — $ 656,044 Commercial real estate non-owner occupied: Pass $ 109,585 $ 157,702 $ 103,630 $ 66,994 $ 166,532 $ 324,225 $ — $ — $ 928,668 Special mention — 21,812 11,172 9,445 43,500 32,777 — — 118,706 Substandard — — — 35,957 20,611 40,701 — — 97,269 Doubtful — — — — — — — — — Total commercial real estate non-owner occupied loans $ 109,585 $ 179,514 $ 114,802 $ 112,396 $ 230,643 $ 397,703 $ — $ — $ 1,144,643 Construction: Pass $ 13,053 $ 42,888 $ 125,339 $ 4,869 $ — $ 9,507 $ 1,441 $ — $ 197,097 Special mention — 1,510 — — — — — — 1,510 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 13,053 $ 44,398 $ 125,339 $ 4,869 $ — $ 9,507 $ 1,441 $ — $ 198,607 Total commercial loans and leases receivable $ 990,168 $ 835,217 $ 701,421 $ 538,678 $ 777,019 $ 1,109,633 $ 1,090,260 $ — $ 6,042,396 Residential real estate loans: Performing $ 4,481 $ 8,272 $ 13,738 $ 11,413 $ 6,735 $ 89,259 $ 106,649 $ — $ 240,547 Non-performing — — 139 1,020 669 4,016 1,762 — 7,606 Total residential real estate loans $ 4,481 $ 8,272 $ 13,877 $ 12,433 $ 7,404 $ 93,275 $ 108,411 $ — $ 248,153 Manufactured housing loans: Performing $ — $ — $ 293 $ 304 $ 75 $ 49,606 $ — $ — $ 50,278 Non-performing — — — — — 5,357 — — 5,357 Total manufactured housing loans $ — $ — $ 293 $ 304 $ 75 $ 54,963 $ — $ — $ 55,635 Installment loans: Performing $ 706,050 $ 405,796 $ 437,711 $ 68,720 $ 2,168 $ 1,123 $ — $ — $ 1,621,568 Non-performing 286 615 1,687 194 4 61 — — 2,847 Total installment loans $ 706,336 $ 406,411 $ 439,398 $ 68,914 $ 2,172 $ 1,184 $ — $ — $ 1,624,415 Total consumer loans $ 710,817 $ 414,683 $ 453,568 $ 81,651 $ 9,651 $ 149,422 $ 108,411 $ — $ 1,928,203 Loans and leases receivable $ 1,700,985 $ 1,249,900 $ 1,154,989 $ 620,329 $ 786,670 $ 1,259,055 $ 1,198,671 $ — $ 7,970,599 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 and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (amounts in thousands) 2021 2020 2021 2020 Purchases (1) Loans receivable, PPP $ 602,175 $ — $ 1,223,662 $ — Residential real estate — — — 495 Installment (2) 50,001 15,700 165,850 225,468 Total $ 652,176 $ 15,700 $ 1,389,512 $ 225,963 Sales (3) Multi-family $ — $ — $ 19,443 $ — Commercial and industrial 6,176 3,968 35,166 3,968 Commercial real estate owner occupied 5,728 — 12,426 — Commercial real estate non-owner occupied — 17,600 18,366 17,600 Residential real estate 14,549 — 42,735 — Installment 103,897 — 132,715 1,822 Total $ 130,350 $ 21,568 $ 260,851 $ 23,390 (1) Amounts reported in the above table are the unpaid principal balance at time of purchase. The purchase price was 99.2% and 98.1% of loans outstanding for the three months ended September 30, 2021 and 2020, respectively. The purchase price was 101.0% and 100.2% of loans outstanding for the nine months ended September 30, 2021 and 2020, respectively. (2) Installment loan purchases for the three and nine months ended September 30, 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) For the three months ended September 30, 2021 and 2020, loan sales resulted in net gains of $5.8 million and $0.3 million, respectively, included in gain (loss) on sale of SBA and other loans and mortgage banking income in the consolidated statements of income. For the nine months ended September 30, 2021 and 2020, loan sales resulted in net gains of $10.1 million and $0.3 million, 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 $3.7 billion and $8.5 billion at September 30, 2021 and December 31, 2020, respectively. No PPP loans were pledged to the FRB in accordance with borrowing from the PPPLF at September 30, 2021. PPP loans of $4.6 billion were pledged to the FRB in accordance with borrowing from the PPPLF at December 31, 2020.

Leases

Leases	9 Months Ended
Leases	Sep. 30, 2021
Leases [Abstract]
Leases	LEASES Lessee Customers has operating leases for its branches, LPOs, and administrative offices, with remaining lease terms ranging between 3 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 September 30, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 14,598 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 15,818 $ 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 September 30, Nine Months Ended September 30, (amounts in thousands) Classification 2021 2020 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,147 $ 1,657 $ 3,394 $ 4,060 (1) There were no variable lease costs for the three and nine months ended September 30, 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 September 30, 2021: (amounts in thousands) September 30, 2021 2021 $ 1,375 2022 5,060 2023 4,208 2024 3,177 2025 2,047 Thereafter 1,424 Total minimum payments 17,291 Less: interest 1,473 Present value of lease liabilities $ 15,818 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 September 30, 2021. Cash paid pursuant to the operating lease liability was $1.3 million and $3.8 million for the three and nine months ended September 30, 2021, respectively. Cash paid pursuant to the operating lease liability was $1.2 million and $4.1 million for the three and nine months ended September 30, 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 September 30, 2021 and December 31, 2020: (amounts in thousands) September 30, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.0 years 4.7 years Weighted average discount rate Operating leases (1) 2.65 % 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 ACL 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 September 30, 2021 and December 31, 2020: (amounts in thousands) Classification September 30, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 126,311 $ 104,982 Guaranteed residual assets Loans and leases receivable 11,609 12,988 Unguaranteed residual assets Loans and leases receivable 5,366 1,229 Deferred initial direct costs Loans and leases receivable 441 560 Unearned income Loans and leases receivable (7,439) (11,175) Net investment in direct financing leases $ 136,288 $ 108,584 Operating leases Investment in operating leases Other assets $ 142,488 $ 131,791 Accumulated depreciation Other assets (36,123) (28,919) Deferred initial direct costs Other assets 937 996 Net investment in operating leases 107,302 103,868 Total lease assets $ 243,590 $ 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 September 30, 2021, the book values of finance and operating leases with payment deferments were $26.3 million and $7.7 million, respectively. At December 31, 2020, the book values of finance and operating leases with payment deferments were $30.4 million and $15.2 million, respectively. The concessions did not have a material impact on interest income from leases for the three and nine months ended September 30, 2021 and 2020. 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 3 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 September 30, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 14,598 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 15,818 $ 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 September 30, Nine Months Ended September 30, (amounts in thousands) Classification 2021 2020 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,147 $ 1,657 $ 3,394 $ 4,060 (1) There were no variable lease costs for the three and nine months ended September 30, 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 September 30, 2021: (amounts in thousands) September 30, 2021 2021 $ 1,375 2022 5,060 2023 4,208 2024 3,177 2025 2,047 Thereafter 1,424 Total minimum payments 17,291 Less: interest 1,473 Present value of lease liabilities $ 15,818 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 September 30, 2021. Cash paid pursuant to the operating lease liability was $1.3 million and $3.8 million for the three and nine months ended September 30, 2021, respectively. Cash paid pursuant to the operating lease liability was $1.2 million and $4.1 million for the three and nine months ended September 30, 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 September 30, 2021 and December 31, 2020: (amounts in thousands) September 30, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.0 years 4.7 years Weighted average discount rate Operating leases (1) 2.65 % 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 ACL 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 September 30, 2021 and December 31, 2020: (amounts in thousands) Classification September 30, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 126,311 $ 104,982 Guaranteed residual assets Loans and leases receivable 11,609 12,988 Unguaranteed residual assets Loans and leases receivable 5,366 1,229 Deferred initial direct costs Loans and leases receivable 441 560 Unearned income Loans and leases receivable (7,439) (11,175) Net investment in direct financing leases $ 136,288 $ 108,584 Operating leases Investment in operating leases Other assets $ 142,488 $ 131,791 Accumulated depreciation Other assets (36,123) (28,919) Deferred initial direct costs Other assets 937 996 Net investment in operating leases 107,302 103,868 Total lease assets $ 243,590 $ 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 September 30, 2021, the book values of finance and operating leases with payment deferments were $26.3 million and $7.7 million, respectively. At December 31, 2020, the book values of finance and operating leases with payment deferments were $30.4 million and $15.2 million, respectively. The concessions did not have a material impact on interest income from leases for the three and nine months ended September 30, 2021 and 2020. 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 3 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 September 30, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 14,598 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 15,818 $ 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 September 30, Nine Months Ended September 30, (amounts in thousands) Classification 2021 2020 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,147 $ 1,657 $ 3,394 $ 4,060 (1) There were no variable lease costs for the three and nine months ended September 30, 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 September 30, 2021: (amounts in thousands) September 30, 2021 2021 $ 1,375 2022 5,060 2023 4,208 2024 3,177 2025 2,047 Thereafter 1,424 Total minimum payments 17,291 Less: interest 1,473 Present value of lease liabilities $ 15,818 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 September 30, 2021. Cash paid pursuant to the operating lease liability was $1.3 million and $3.8 million for the three and nine months ended September 30, 2021, respectively. Cash paid pursuant to the operating lease liability was $1.2 million and $4.1 million for the three and nine months ended September 30, 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 September 30, 2021 and December 31, 2020: (amounts in thousands) September 30, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.0 years 4.7 years Weighted average discount rate Operating leases (1) 2.65 % 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 ACL 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 September 30, 2021 and December 31, 2020: (amounts in thousands) Classification September 30, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 126,311 $ 104,982 Guaranteed residual assets Loans and leases receivable 11,609 12,988 Unguaranteed residual assets Loans and leases receivable 5,366 1,229 Deferred initial direct costs Loans and leases receivable 441 560 Unearned income Loans and leases receivable (7,439) (11,175) Net investment in direct financing leases $ 136,288 $ 108,584 Operating leases Investment in operating leases Other assets $ 142,488 $ 131,791 Accumulated depreciation Other assets (36,123) (28,919) Deferred initial direct costs Other assets 937 996 Net investment in operating leases 107,302 103,868 Total lease assets $ 243,590 $ 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 September 30, 2021, the book values of finance and operating leases with payment deferments were $26.3 million and $7.7 million, respectively. At December 31, 2020, the book values of finance and operating leases with payment deferments were $30.4 million and $15.2 million, respectively. The concessions did not have a material impact on interest income from leases for the three and nine months ended September 30, 2021 and 2020. Additionally, Customers did not receive any concessions on its operating leases in which Customers is the lessee.

Borrowings

Borrowings	9 Months Ended
Borrowings	Sep. 30, 2021
Debt Disclosure [Abstract]
Borrowings	BORROWINGS Short-term debt Short-term debt at September 30, 2021 and December 31, 2020 was as follows: September 30, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ — — % $ 850,000 1.19 % Federal funds purchased — — % 250,000 0.09 % Total short-term debt $ — $ 1,100,000 The following is a summary of additional information relating to Customers' short-term debt: (dollars in thousands) September 30, 2021 (1) December 31, 2020 (2) FHLB advances Maximum outstanding at any month end $ 850,000 $ 910,000 Average balance during the period 333,396 809,788 Weighted-average interest rate during the period 2.47 % 2.31 % Federal funds purchased Maximum outstanding at any month end 365,000 842,000 Average balance during the period 29,286 239,481 Weighted-average interest rate during the period 0.07 % 0.19 % (1) For the nine months ended September 30, 2021. (2) For the year ended December 31, 2020. At September 30, 2021 and December 31, 2020, Customers Bank had aggregate availability under federal funds lines totaling $1.4 billion and $924.0 million, respectively. Long-term debt FHLB and FRB advances Long-term FHLB and FRB advances at September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FRB PPP Liquidity Facility advances $ — — % $ 4,415,016 0.35 % Total long-term FHLB and FRB advances $ — $ 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. During the three months ended September 30, 2021, Customers repaid the PPPLF advances. No new advances are available from the PPPLF after July 30, 2021. The maximum borrowing capacity with the FHLB and FRB at September 30, 2021 and December 31, 2020 was as follows: (amounts in thousands) September 30, 2021 December 31, 2020 Total maximum borrowing capacity with the FHLB $ 2,789,580 $ 2,729,516 Total maximum borrowing capacity with the FRB (1) 186,841 223,299 Qualifying loans serving as collateral against FHLB and FRB advances (1) 3,613,109 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. Customers had no borrowings under the PPPLF at September 30, 2021. 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 September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 December 31, 2020 (dollars in thousands) Issued by Ranking Amount Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior (1) $ 98,809 $ — 2.875 % $ 100,000 August 2021 August 2031 100.000 % Customers Bancorp Senior 24,641 24,552 4.500 % 25,000 September 2019 September 2024 100.000 % Customers Bancorp Senior 99,701 99,485 3.950 % 100,000 June 2017 June 2022 99.775 % Total other borrowings $ 223,151 $ 124,037 Customers Bancorp Subordinated (2)(3) $ 72,358 $ 72,222 5.375 % $ 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (2)(4) 109,245 109,172 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 181,603 $ 181,394 (1) The senior notes will bear an annual fixed rate of 2.875% until August 15, 2026. From August 15, 2026 until maturity, the notes will bear an annual interest rate equal to a benchmark rate, which is expected to be the three-month term SOFR, plus 235 basis points. Customers Bancorp has the ability to call the senior notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after August 15, 2026. (2) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (3) 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. (4) 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.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
Shareholders' Equity	Sep. 30, 2021
Equity [Abstract]
SHAREHOLDERS’ EQUITY	SHAREHOLDERS’ EQUITY Common Stock On August 25, 2021, the Board of Directors of Customers Bancorp authorized the Share Repurchase Program to repurchase up to 3,235,326 shares of the Company's common stock (representing 10% of the Company’s outstanding shares of common stock on June 30, 2021). The term of the Share Repurchase Program will extend for one year from September 27, 2021, unless earlier terminated. Purchases of shares under the Share Repurchase Program may be executed through open market purchases, privately negotiated transactions, through the use of Rule 10b5-1 plans, or otherwise. The exact number of shares, timing for such purchases, and the price and terms at and on which such purchases are to be made will be at the discretion of the Company and will comply with all applicable regulatory limitations. Customers Bancorp did not purchase any shares of its common stock during the three months ended September 30, 2021 pursuant to the Share Repurchase Program. Customers Bancorp purchased 167,233 shares of its common stock for $7.2 million under the Share Repurchase Program on various dates between October 1, 2021 and October 15, 2021. Preferred Stock As of September 30, 2021, Customers Bancorp has two series of preferred stock outstanding. On September 15, 2021, Customers redeemed all of the outstanding shares of Series C and Series D Preferred Stock for an aggregate payment of $82.5 million, at a redemption price of $25.00 per share. The redemption price paid in excess of the carrying value of Series C and Series D Preferred Stock of $2.8 million is included as a loss on redemption of preferred stock in the consolidated statements of income for the three and nine months ended September 30, 2021. After giving effect to the redemption, no shares of the Series C and Series D Preferred Stock remained outstanding. The table below summarizes Customers' issuances of preferred stock and the dividends paid per share. (amounts in thousands except share and per share data) Shares at Carrying value at December 31, Initial Fixed Rate Date at which dividend rate becomes floating and earliest redemption date Floating rate of Three-Month LIBOR Plus: Dividend Paid Per Share in 2021 (1) Fixed-to-floating rate: Issue Date September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Series C May 18, 2015 — 2,300,000 $ — $ 55,569 7.00 % June 15, 2020 5.300 % $ 1.04 Series D January 29, 2016 — 1,000,000 — 24,108 6.50 % March 15, 2021 5.090 % $ 1.08 Series E April 28, 2016 2,300,000 2,300,000 55,593 55,593 6.45 % June 15, 2021 5.140 % $ 1.14 Series F September 16, 2016 3,400,000 3,400,000 82,201 82,201 6.00 % December 15, 2021 4.762 % $ 1.13 Totals 5,700,000 9,000,000 $ 137,794 $ 217,471 (1) For the nine months ended September 30, 2021. On June 15, 2020, Series C Preferred Stock became floating at three-month LIBOR plus 5.30%, compared to a fixed rate of 7.00%. On March 15, 2021, Series D Preferred Stock became floating at three-month LIBOR plus 5.09%, compared to a fixed rate of 6.50%. On June 15, 2021, the Series E Preferred Stock became floating at three-month LIBOR plus 5.14%, compared to a fixed rate of 6.45%.

Regulatory Capital

Regulatory Capital	9 Months Ended
Regulatory Capital	Sep. 30, 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 September 30, 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 September 30, 2021: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,201,160 10.412 % $ 519,125 4.500 % N/A N/A $ 807,527 7.000 % Customers Bank $ 1,471,897 12.765 % $ 518,878 4.500 % $ 749,491 6.500 % $ 807,144 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,338,953 11.607 % $ 692,166 6.000 % N/A N/A $ 980,569 8.500 % Customers Bank $ 1,471,897 12.765 % $ 691,838 6.000 % $ 922,451 8.000 % $ 940,104 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,572,222 13.629 % $ 922,888 8.000 % N/A N/A $ 1,211,291 10.500 % Customers Bank $ 1,632,808 14.161 % $ 922,451 8.000 % $ 1,153,063 10.000 % $ 1,210,716 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,338,953 7.876 % $ 679,974 4.000 % N/A N/A $ 679,974 4.000 % Customers Bank $ 1,471,897 8.660 % $ 679,839 4.000 % $ 849,799 5.000 % $ 679,838 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 common equity Tier 1, 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	9 Months Ended
Disclosures About Fair Value of Financial Instruments	Sep. 30, 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 September 30, 2021 and December 31, 2020: Financial Instruments Recorded at Fair Value on a Recurring Basis Investment securities: The fair values of equity securities with readily determinable fair values, 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 September 30, 2021 and December 31, 2020 were as follows. Fair Value Measurements at September 30, 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 $ 1,052,054 $ 1,052,054 $ 1,052,054 $ — $ — Debt securities, available for sale 1,861,697 1,861,697 — 1,796,080 65,617 Loans held for sale 29,957 29,957 — 29,449 508 Total loans and leases receivable, net of allowance for credit losses on loans and leases 15,354,084 15,323,107 — 2,557,624 12,765,483 FHLB, Federal Reserve Bank and other restricted stock 57,184 57,184 — 57,184 — Derivatives 34,234 34,234 — 34,071 163 Liabilities: Deposits $ 16,971,025 $ 16,971,434 $ 16,377,876 $ 593,558 $ — Other borrowings 223,151 229,582 — 229,582 — Subordinated debt 181,603 200,080 — 200,080 — Derivatives 34,573 34,573 — 34,573 — 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 September 30, 2021 and December 31, 2020 were as follows: September 30, 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 $ — $ 159,840 $ 65,617 $ 225,457 Agency-guaranteed residential mortgage-backed securities — 9,666 — 9,666 Agency-guaranteed commercial mortgage-backed securities — 2,194 — 2,194 Agency-guaranteed residential collateralized mortgage obligations — 102,194 — 102,194 Agency-guaranteed commercial collateralized mortgage obligations — 141,808 — 141,808 Commercial mortgage-backed securities — 28,088 — 28,088 Collateralized loan obligations — 315,502 — 315,502 Corporate notes — 440,892 — 440,892 Private label collateralized mortgage obligations — 587,241 — 587,241 State and political subdivision debt securities — 8,655 — 8,655 Derivatives — 34,071 163 34,234 Loans held for sale – fair value option — 12,159 — 12,159 Loans receivable, mortgage warehouse – fair value option — 2,557,624 — 2,557,624 Total assets – recurring fair value measurements $ — $ 4,399,934 $ 65,780 $ 4,465,714 Liabilities Derivatives $ — $ 34,573 $ — $ 34,573 Measured at Fair Value on a Nonrecurring Basis: Assets Collateral-dependent loans $ — $ 17,290 $ 7,865 $ 25,155 Total assets – nonrecurring fair value measurements $ — $ 17,290 $ 7,865 $ 25,155 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 residential mortgage–backed securities — 63,091 — 63,091 Agency-guaranteed residential collateralized mortgage obligations — 140,841 — 140,841 Agency-guaranteed commercial collateralized mortgage obligations — 20,926 — 20,926 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 and nine months ended September 30, 2021 and 2020 are summarized in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 14 – DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments Three Months Ended September 30, (amounts in thousands) 2021 2020 Balance at June 30 $ 301 $ 52 Issuances 163 455 Settlements (301) (52) Balance at September 30 $ 163 $ 455 Residential Mortgage Loan Commitments Nine Months Ended September 30, (amounts in thousands) 2021 2020 Balance at December 31 $ 200 $ 79 Issuances 660 722 Settlements (697) (346) Balance at September 30 $ 163 $ 455 There were no transfers between levels during the three and nine months ended September 30, 2021 and 2020. The following table summarizes financial assets and financial liabilities measured at fair value as of September 30, 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) September 30, 2021 Asset-backed securities $ 65,617 Discounted cash flow Discount rate Annualized loss rate Constant prepayment rate 4% - 6% (5%) 2% - 6% (4%) 12% - 25% (17%) Collateral-dependent loans – real estate 6,616 Collateral appraisal (1) Liquidation expenses (2) 5% - 9% (7%) Collateral-dependent loans – commercial and industrial 741 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 8% - 26% (12%) 20% - 20% (20%) Residential mortgage loan commitments 163 Adjusted market bid Pull-through rate 75% - 94% (83%) (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	9 Months Ended
Derivative Instruments and Hedging Activities	Sep. 30, 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 5 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. During the nine months ended September 30, 2021, Customers terminated 4 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. Customers hedged its exposure to the variability in future cash flows for a variable-rate deposit, which matured in June 2021. At September 30, 2021, Customers had no interest rate derivative designated as cash flow hedges of interest rate risk. 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 September 30, 2021, Customers had 16 outstanding interest rate derivatives with notional amounts totaling $80.5 million that were designated as fair value hedges of certain AFS debt securities. During the nine months ended September 30, 2021, Customers terminated 8 interest rate derivatives with notional amounts totaling $191.8 million that were designated as fair value hedges together with the sale of hedged AFS 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 September 30, 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 September 30, December 31, September 30, December 31, (amounts in thousands) 2021 2020 2021 2020 Available for sale debt securities $ 80,500 $ 272,159 $ 846 $ 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 September 30, 2021, Customers had 155 interest rate swaps with an aggregate notional amount of $1.4 billion and 14 interest rate caps with an aggregated notional amount of $265.6 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 12 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 September 30, 2021 and December 31, 2020, Customers had an outstanding notional balance of residential mortgage loan commitments of $8.7 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 September 30, 2021 and December 31, 2020, Customers had outstanding notional balances of credit derivatives of $162.2 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 September 30, 2021 and December 31, 2020. September 30, 2021 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as fair value hedges: Interest rate swaps Other assets $ 846 Other liabilities $ — Total $ 846 $ — Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 32,905 Other liabilities $ 34,216 Interest rate caps Other assets 150 Other liabilities 150 Credit contracts Other assets 170 Other liabilities 207 Residential mortgage loan commitments Other assets 163 Other liabilities — Total $ 33,388 $ 34,573 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 and nine months ended September 30, 2021 and 2020. Amount of Income (Loss) Recognized in Earnings Three Months Ended September 30, Nine Months Ended September 30, (amounts in thousands) Income Statement Location 2021 2020 2021 2020 Derivatives designated as fair value hedges: Recognized on interest rate swaps Net interest income $ — $ — $ 4,777 $ — Recognized on hedged available for sale debt securities Net interest income — — (4,777) — Total $ — $ — $ — $ — Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 517 $ 387 $ 2,540 $ (6,191) Interest rate caps Other non-interest income — — — — Credit contracts Other non-interest income 7 162 81 1,436 Residential mortgage loan commitments Mortgage banking income (138) 403 (37) 376 Total $ 386 $ 952 $ 2,584 $ (4,379) Effect of Derivative Instruments on Comprehensive Income The following table presents the effect of Customers' derivative financial instruments on comprehensive income for the three and nine months ended September 30, 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 September 30, Three Months Ended (amounts in thousands) 2021 2020 2021 2020 Derivatives in cash flow hedging relationships: Interest rate swaps $ — $ 429 Interest expense $ — $ (4,400) 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 Nine Months Ended September 30, Nine Months Ended (amounts in thousands) 2021 2020 2021 2020 Derivatives in cash flow hedging relationships: Interest rate swaps $ 9,117 $ (24,602) Interest expense $ (2,505) $ (8,596) — — Other non-interest income (24,467) — Total $ 9,117 $ (24,602) $ (26,972) $ (8,596) (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 September 30, 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 $33.2 million. In addition, Customers, which has collateral posting thresholds with certain of these counterparties, had posted $31.7 million of cash as collateral at September 30, 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 September 30, 2021 Interest rate derivative assets with institutional counterparties $ — $ — $ — $ — Interest rate derivative liabilities with institutional counterparties $ 31,693 $ — $ (31,693) $ — 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	9 Months Ended
Loss Contingencies	Sep. 30, 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. 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 was 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. 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)	9 Months Ended
	Sep. 30, 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 and nine months ended September 30, 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 September 30, 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, which are not expected to have a material impact on Customers' financial condition, results of operations and consolidated financial statements. 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 September 30, 2021, Customers has not yet elected to apply optional expedients for certain contract modifications. We plan to elect additional optional expedients in the future, which are not expected to have a material impact on Customers' financial condition, results of operations and consolidated financial statements.
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 5 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. During the nine months ended September 30, 2021, Customers terminated 4 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. Customers hedged its exposure to the variability in future cash flows for a variable-rate deposit, which matured in June 2021. At September 30, 2021, Customers had no interest rate derivative designated as cash flow hedges of interest rate risk.

Significant Accounting Polici_3

Significant Accounting Policies and Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	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 September 30, 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, which are not expected to have a material impact on Customers' financial condition, results of operations and consolidated financial statements. 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 September 30, 2021, Customers has not yet elected to apply optional expedients for certain contract modifications. We plan to elect additional optional expedients in the future, which are not expected to have a material impact on Customers' financial condition, results of operations and consolidated financial statements.

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
Discontinued Operations (Tables)	Sep. 30, 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 Nine Months Ended (amounts in thousands) 2021 2020 2021 2020 Discontinued operations: Non-interest income $ — $ 16,365 $ — $ 48,691 Non-interest expense — 16,712 20,354 58,950 Loss from discontinued operations before income taxes — (347) (20,354) (10,259) Income tax expense (benefit) — 185 17,682 (2,114) Net loss from discontinued operations $ — $ (532) $ (38,036) $ (8,145) 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)	9 Months Ended
Earnings (Loss) Per Share (Tables)	Sep. 30, 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 Nine Months Ended (amounts in thousands, except share and per share data) 2021 2020 2021 2020 Net income from continuing operations available to common shareholders $ 110,241 $ 47,617 $ 239,523 $ 73,851 Net loss from discontinued operations — (532) (38,036) (8,145) Net income available to common shareholders $ 110,241 $ 47,085 $ 201,487 $ 65,706 Weighted-average number of common shares outstanding – basic 32,449,853 31,517,504 32,206,547 31,462,284 Share-based compensation plans 1,418,700 218,807 1,281,125 203,743 Weighted-average number of common shares – diluted 33,868,553 31,736,311 33,487,672 31,666,027 Basic earnings (loss) per common share from continuing operations $ 3.40 $ 1.51 $ 7.44 $ 2.35 Basic earnings (loss) per common share from discontinued operations — (0.02) (1.18) (0.26) Basic earnings (loss) per common share 3.40 1.49 6.26 2.09 Diluted earnings (loss) per common share from continuing operations $ 3.25 $ 1.50 $ 7.15 $ 2.33 Diluted earnings (loss) per common share from discontinued operations — (0.02) (1.13) (0.26) Diluted earnings (loss) per common share 3.25 1.48 6.02 2.07
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 Nine Months Ended 2021 2020 2021 2020 Share-based compensation awards 710,000 862,417 711,000 862,417

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Loss) By Component (Tables)	9 Months Ended
	Sep. 30, 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 and nine months ended September 30, 2021 and 2020. Amounts in parentheses indicate reductions to AOCI. Three Months Ended September 30, 2021 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - June 30, 2021 $ 5,266 $ — $ 5,266 Unrealized gains (losses) arising during period, before tax 958 — 958 Income tax effect (249) — (249) Other comprehensive income (loss) before reclassifications 709 — 709 Reclassification adjustments for (gains) losses included in net income, before tax (6,063) — (6,063) Income tax effect 1,576 — 1,576 Amounts reclassified from accumulated other comprehensive income (loss) to net income (4,487) — (4,487) Net current-period other comprehensive income (loss) (3,778) — (3,778) Balance - September 30, 2021 $ 1,488 $ — $ 1,488 Three Months Ended September 30, 2020 (amounts in thousands) Unrealized Gains (Losses) on Available for Sale Securities (1) Unrealized Gains (Losses) on Cash Flow Hedges (2) Total Balance - June 30, 2020 $ 27,525 $ (37,490) $ (9,965) Unrealized gains (losses) arising during period, before tax (1,090) 580 (510) Income tax effect 283 (151) 132 Other comprehensive income (loss) before reclassifications (807) 429 (378) Reclassification adjustments for (gains) losses included in net income, before tax (11,707) 4,400 (7,307) Income tax effect 3,044 (1,145) 1,899 Amounts reclassified from accumulated other comprehensive income (loss) to net income (8,663) 3,255 (5,408) Net current-period other comprehensive income (loss) (9,470) 3,684 (5,786) Balance - September 30, 2020 $ 18,055 $ (33,806) $ (15,751) (1) Reclassification amounts for AFS debt securities are reported as gain (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. Nine Months Ended September 30, 2021 (amounts in thousands) Unrealized Gains (Losses) 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 1,950 12,321 14,271 Income tax effect (507) (3,204) (3,711) Other comprehensive income (loss) before reclassifications 1,443 9,117 10,560 Reclassification adjustments for (gains) losses included in net income, before tax (31,441) 26,972 (4,469) Income tax effect 8,174 (7,013) 1,161 Amounts reclassified from accumulated other comprehensive income (loss) to net income (23,267) 19,959 (3,308) Net current-period other comprehensive income (loss) (21,824) 29,076 7,252 Balance - September 30, 2021 $ 1,488 $ — $ 1,488 Nine Months Ended September 30, 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 25,127 (33,486) (8,359) Income tax effect (6,533) 8,884 2,351 Other comprehensive income (loss) before reclassifications 18,594 (24,602) (6,008) Reclassification adjustments for (gains) losses included in net income, before tax (20,035) 8,596 (11,439) Income tax effect 5,209 (2,263) 2,946 Amounts reclassified from accumulated other comprehensive income (loss) to net income (14,826) 6,333 (8,493) Net current-period other comprehensive income 3,768 (18,269) (14,501) Balance - September 30, 2020 $ 18,055 $ (33,806) $ (15,751) (1) Reclassification amounts for AFS debt securities are reported as gain (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)	9 Months Ended
Investment Securities (Tables)	Sep. 30, 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 September 30, 2021 and December 31, 2020 are summarized in the tables below: September 30, 2021 (1) (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 225,182 $ 400 $ (125) $ 225,457 Agency-guaranteed residential mortgage-backed securities 9,924 — (258) 9,666 Agency-guaranteed commercial mortgage-backed securities 2,184 10 — 2,194 Agency-guaranteed residential collateralized mortgage obligations 102,110 174 (90) 102,194 Agency-guaranteed commercial collateralized mortgage obligations 143,858 56 (2,106) 141,808 Collateralized loan obligations 315,501 110 (109) 315,502 Commercial mortgage-backed securities 28,035 53 — 28,088 Corporate notes (2) 437,179 4,260 (547) 440,892 Private label collateralized mortgage obligations 588,017 601 (1,377) 587,241 State and political subdivision debt securities (3) 8,539 116 — 8,655 Available for sale debt securities $ 1,860,529 $ 5,780 $ (4,612) 1,861,697 Equity securities (4) 5,000 Total investment securities, at fair value $ 1,866,697 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 residential mortgage-backed securities 61,178 1,913 — 63,091 Agency-guaranteed residential collateralized mortgage obligations 139,985 916 (60) 140,841 Agency-guaranteed commercial collateralized mortgage obligations 20,965 — (39) 20,926 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 $6.3 million and $4.2 million at September 30, 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 perpetual preferred stock issued by a domestic bank without a readily determinable fair value at September 30, 2021 and equity securities issued by a foreign entity with readily determinable fair value at December 31, 2020. No impairments or measurement adjustments have been recorded on the perpetual preferred stock since acquisition.
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: September 30, 2021 (amounts in thousands) Amortized Fair Due in one year or less $ 4,932 $ 5,022 Due after one year through five years 280,813 282,050 Due after five years through ten years 156,973 159,475 Due after ten years 3,000 3,000 Asset-backed securities 225,182 225,457 Collateralized loan obligations 315,501 315,502 Commercial mortgage-backed securities 28,035 28,088 Agency-guaranteed residential mortgage-backed securities 9,924 9,666 Agency-guaranteed commercial mortgage-backed securities 2,184 2,194 Agency-guaranteed residential collateralized mortgage obligations 102,110 102,194 Agency-guaranteed commercial collateralized mortgage obligations 143,858 141,808 Private label collateralized mortgage obligations 588,017 587,241 Total debt securities $ 1,860,529 $ 1,861,697
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 September 30, 2021 were as follows: September 30, 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 $ 21,800 $ (125) $ — $ — $ 21,800 $ (125) Agency-guaranteed residential mortgage-backed securities 9,666 (258) — — 9,666 (258) Agency-guaranteed commercial mortgage-backed securities — — — — — — Agency-guaranteed residential collateralized mortgage obligations 25,548 (90) — — 25,548 (90) Agency-guaranteed commercial collateralized mortgage obligations 121,156 (2,106) — — 121,156 (2,106) Collateralized loan obligations 71,508 (109) — — 71,508 (109) Corporate notes 98,662 (504) 1,957 (43) 100,619 (547) Private label collateralized mortgage obligations 138,669 (1,377) — — 138,669 (1,377) Total $ 487,009 $ (4,569) $ 1,957 $ (43) $ 488,966 $ (4,612)

Loans Held for Sale (Tables)

Loans Held for Sale (Tables)	9 Months Ended
Loans Held for Sale (Tables)	Sep. 30, 2021
Receivables Held-for-sale [Abstract]
Composition of Loans Held for Sale	The composition of loans held for sale as of September 30, 2021 and December 31, 2020 was as follows: (amounts in thousands) September 30, 2021 December 31, 2020 Commercial loans: Multi-family loans, at lower of cost or fair value $ 17,290 $ — 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 17,290 72,934 Consumer loans: Home equity conversion mortgages, at lower of cost or fair value 508 643 Residential mortgage loans, at fair value 12,159 5,509 Total consumer loans held for sale 12,667 6,152 Loans held for sale $ 29,957 $ 79,086

Loans and Leases Receivable a_2

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Schedule of Loans and Leases Receivable	The following table presents loans and leases receivable as of September 30, 2021 and December 31, 2020. (amounts in thousands) September 30, 2021 December 31, 2020 Loans and leases receivable, mortgage warehouse, at fair value $ 2,557,624 $ 3,616,432 Loans receivable, PPP 4,957,357 4,561,365 Loans receivable: Commercial: Multi-family 1,369,876 1,761,301 Commercial and industrial (1) 2,673,226 2,289,441 Commercial real estate owner occupied 656,044 572,338 Commercial real estate non-owner occupied 1,144,643 1,196,564 Construction 198,607 140,905 Total commercial loans and leases receivable 6,042,396 5,960,549 Consumer: Residential real estate 248,153 317,170 Manufactured housing 55,635 62,243 Installment 1,624,415 1,235,406 Total consumer loans receivable 1,928,203 1,614,819 Loans and leases receivable (2) 7,970,599 7,575,368 Allowance for credit losses on loans and leases (131,496) (144,176) Total loans and leases receivable, net of allowance for credit losses on loans and leases $ 15,354,084 $ 15,608,989 (1) Includes direct finance equipment leases of $135.8 million and $108.0 million at September 30, 2021 and December 31, 2020, respectively. (2) Includes deferred (fees) costs and unamortized (discounts) premiums, net of $(131.2) million and $(54.6) million at September 30, 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 September 30, 2021 and December 31, 2020: September 30, 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 $ — $ 8,896 $ 24,132 $ 33,028 $ 1,336,848 $ 1,369,876 Commercial and industrial 1,970 2,433 6,706 11,109 2,662,117 2,673,226 Commercial real estate owner occupied — 326 1,351 1,677 654,367 656,044 Commercial real estate non-owner occupied — 12,795 2,845 15,640 1,129,003 1,144,643 Construction — — — — 198,607 198,607 Residential real estate 1,042 795 2,821 4,658 243,495 248,153 Manufactured housing 2,967 225 5,455 8,647 46,988 55,635 Installment 5,625 3,555 3,544 12,724 1,611,691 1,624,415 Total $ 11,604 $ 29,025 $ 46,854 $ 87,483 $ 7,883,116 $ 7,970,599 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 September 30, 2021 and December 31, 2020 tables exclude PPP loans of $5.0 billion and $4.6 billion, respectively, which are all current as of September 30, 2021 and December 31, 2020. (3) Includes PCD loans of $11.0 million and $13.4 million at September 30, 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. September 30, 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 $ 24,524 $ — $ 24,524 $ 18,800 $ 2,928 $ 21,728 Commercial and industrial 6,558 393 6,951 6,384 2,069 8,453 Commercial real estate owner occupied 2,412 — 2,412 3,411 — 3,411 Commercial real estate non-owner occupied 2,845 — 2,845 2,356 — 2,356 Residential real estate 7,738 — 7,738 9,911 — 9,911 Manufactured housing — 3,520 3,520 — 2,969 2,969 Installment — 3,544 3,544 — 3,211 3,211 Total $ 44,077 $ 7,457 $ 51,534 $ 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 and nine months ended September 30, 2021 and 2020 are presented in the tables below. (amounts in thousands) Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended Ending Balance, $ 5,028 $ 8,127 $ 4,464 $ 7,374 $ 2,643 $ 2,299 $ 4,372 $ 91,129 $ 125,436 Charge-offs — (516) (524) (943) — (79) — (6,693) (8,755) Recoveries — 400 474 — 3 25 — 749 1,651 Provision (benefit) for credit losses (631) 2,849 (797) 944 (1,760) (333) 38 12,854 13,164 Ending Balance, $ 4,397 $ 10,860 $ 3,617 $ 7,375 $ 886 $ 1,912 $ 4,410 $ 98,039 $ 131,496 Nine Months Ended Ending Balance, $ 12,620 $ 12,239 $ 9,512 $ 19,452 $ 5,871 $ 3,977 $ 5,190 $ 75,315 $ 144,176 Charge-offs (1,132) (1,153) (666) (943) — (129) — (27,338) (31,361) Recoveries — 945 483 69 122 47 — 3,479 5,145 Provision (benefit) for credit losses (7,091) (1,171) (5,712) (11,203) (5,107) (1,983) (780) 46,583 13,536 Ending Balance, $ 4,397 $ 10,860 $ 3,617 $ 7,375 $ 886 $ 1,912 $ 4,410 $ 98,039 $ 131,496 (amounts in thousands) Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended September 30, 2020 Ending Balance, $ 14,697 $ 12,302 $ 11,405 $ 26,493 $ 5,297 $ 4,550 $ 6,014 $ 79,147 $ 159,905 Charge-offs — (2,527) (44) (10,181) — — — (9,194) (21,946) Recoveries — 2,582 — 1,258 6 17 — 784 4,647 Provision (benefit) for credit losses 329 569 (1,809) 2,630 1,120 82 (389) 10,423 12,955 Ending Balance, September 30, 2020 $ 15,026 $ 12,926 $ 9,552 $ 20,200 $ 6,423 $ 4,649 $ 5,625 $ 81,160 $ 155,561 Nine Months Ended 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 - CECL 2,171 759 5,773 7,918 (98) 1,518 3,802 57,986 79,829 Charge-offs — (2,645) (44) (25,779) — — — (23,744) (52,212) Recoveries — 2,661 5 1,258 122 72 — 1,759 5,877 Provision (benefit) for credit losses 6,698 (3,405) 1,583 30,560 5,137 (159) 763 24,511 65,688 Ending Balance, $ 15,026 $ 12,926 $ 9,552 $ 20,200 $ 6,423 $ 4,649 $ 5,625 $ 81,160 $ 155,561
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 and nine months ended September 30, 2021 and 2020. There were no modifications that involved forgiveness of debt for the three and nine months ended September 30, 2021 and 2020. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Extensions of maturity — $ — — $ — — $ — 6 $ 385 Interest-rate reductions 4 244 2 88 16 585 34 1,461 Other (1) 39 687 65 1,385 158 2,369 65 1,385 Total 43 $ 931 67 $ 1,473 174 $ 2,954 105 $ 3,231 (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: September 30, 2021 September 30, 2020 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Manufactured housing 2 $ 71 5 $ 201 Commercial real estate owner occupied — — 1 952 Residential real estate — — 1 95 Installment 19 231 8 126 Total loans 21 $ 302 15 $ 1,374
Credit Ratings of Covered and Non-Covered Loan Portfolio	The following tables present the credit ratings of loans and leases receivable as of September 30, 2021 and December 31, 2020. Term Loans Amortized Cost Basis by Origination Year as of September 30, 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 $ 126,265 $ 132,433 $ 22,974 $ 232,655 $ 331,909 $ 422,484 $ — $ — $ 1,268,720 Special mention — — — 4,902 2,773 18,029 — — 25,704 Substandard — — — — 41,364 34,088 — — 75,452 Doubtful — — — — — — — — — Total multi-family loans $ 126,265 $ 132,433 $ 22,974 $ 237,557 $ 376,046 $ 474,601 $ — $ — $ 1,369,876 Commercial and industrial loans and leases: Pass $ 568,013 $ 381,413 $ 276,126 $ 94,175 $ 93,126 $ 94,554 $ 1,067,761 $ — $ 2,575,168 Special mention 19,387 3,186 5,750 5,084 — 210 13,171 — 46,788 Substandard — 10,380 7,484 12,065 7,098 7,028 7,215 — 51,270 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 587,400 $ 394,979 $ 289,360 $ 111,324 $ 100,224 $ 101,792 $ 1,088,147 $ — $ 2,673,226 Commercial real estate owner occupied loans: Pass $ 153,865 $ 83,893 $ 142,061 $ 62,723 $ 59,116 $ 114,479 $ 672 $ — $ 616,809 Special mention — — — 318 2,058 579 — — 2,955 Substandard — — 6,885 9,491 8,932 10,972 — — 36,280 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 153,865 $ 83,893 $ 148,946 $ 72,532 $ 70,106 $ 126,030 $ 672 $ — $ 656,044 Commercial real estate non-owner occupied: Pass $ 109,585 $ 157,702 $ 103,630 $ 66,994 $ 166,532 $ 324,225 $ — $ — $ 928,668 Special mention — 21,812 11,172 9,445 43,500 32,777 — — 118,706 Substandard — — — 35,957 20,611 40,701 — — 97,269 Doubtful — — — — — — — — — Total commercial real estate non-owner occupied loans $ 109,585 $ 179,514 $ 114,802 $ 112,396 $ 230,643 $ 397,703 $ — $ — $ 1,144,643 Construction: Pass $ 13,053 $ 42,888 $ 125,339 $ 4,869 $ — $ 9,507 $ 1,441 $ — $ 197,097 Special mention — 1,510 — — — — — — 1,510 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 13,053 $ 44,398 $ 125,339 $ 4,869 $ — $ 9,507 $ 1,441 $ — $ 198,607 Total commercial loans and leases receivable $ 990,168 $ 835,217 $ 701,421 $ 538,678 $ 777,019 $ 1,109,633 $ 1,090,260 $ — $ 6,042,396 Residential real estate loans: Performing $ 4,481 $ 8,272 $ 13,738 $ 11,413 $ 6,735 $ 89,259 $ 106,649 $ — $ 240,547 Non-performing — — 139 1,020 669 4,016 1,762 — 7,606 Total residential real estate loans $ 4,481 $ 8,272 $ 13,877 $ 12,433 $ 7,404 $ 93,275 $ 108,411 $ — $ 248,153 Manufactured housing loans: Performing $ — $ — $ 293 $ 304 $ 75 $ 49,606 $ — $ — $ 50,278 Non-performing — — — — — 5,357 — — 5,357 Total manufactured housing loans $ — $ — $ 293 $ 304 $ 75 $ 54,963 $ — $ — $ 55,635 Installment loans: Performing $ 706,050 $ 405,796 $ 437,711 $ 68,720 $ 2,168 $ 1,123 $ — $ — $ 1,621,568 Non-performing 286 615 1,687 194 4 61 — — 2,847 Total installment loans $ 706,336 $ 406,411 $ 439,398 $ 68,914 $ 2,172 $ 1,184 $ — $ — $ 1,624,415 Total consumer loans $ 710,817 $ 414,683 $ 453,568 $ 81,651 $ 9,651 $ 149,422 $ 108,411 $ — $ 1,928,203 Loans and leases receivable $ 1,700,985 $ 1,249,900 $ 1,154,989 $ 620,329 $ 786,670 $ 1,259,055 $ 1,198,671 $ — $ 7,970,599 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 and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (amounts in thousands) 2021 2020 2021 2020 Purchases (1) Loans receivable, PPP $ 602,175 $ — $ 1,223,662 $ — Residential real estate — — — 495 Installment (2) 50,001 15,700 165,850 225,468 Total $ 652,176 $ 15,700 $ 1,389,512 $ 225,963 Sales (3) Multi-family $ — $ — $ 19,443 $ — Commercial and industrial 6,176 3,968 35,166 3,968 Commercial real estate owner occupied 5,728 — 12,426 — Commercial real estate non-owner occupied — 17,600 18,366 17,600 Residential real estate 14,549 — 42,735 — Installment 103,897 — 132,715 1,822 Total $ 130,350 $ 21,568 $ 260,851 $ 23,390 (1) Amounts reported in the above table are the unpaid principal balance at time of purchase. The purchase price was 99.2% and 98.1% of loans outstanding for the three months ended September 30, 2021 and 2020, respectively. The purchase price was 101.0% and 100.2% of loans outstanding for the nine months ended September 30, 2021 and 2020, respectively. (2) Installment loan purchases for the three and nine months ended September 30, 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) For the three months ended September 30, 2021 and 2020, loan sales resulted in net gains of $5.8 million and $0.3 million, respectively, included in gain (loss) on sale of SBA and other loans and mortgage banking income in the consolidated statements of income. For the nine months ended September 30, 2021 and 2020, loan sales resulted in net gains of $10.1 million and $0.3 million, respectively.

Leases (Tables)

Leases (Tables)	9 Months Ended
Leases (Tables)	Sep. 30, 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 September 30, 2021 December 31, 2020 ASSETS Operating lease ROU assets (1) Other assets $ 14,598 $ 16,578 LIABILITIES Operating lease liabilities (1) Other liabilities $ 15,818 $ 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 September 30, Nine Months Ended September 30, (amounts in thousands) Classification 2021 2020 2021 2020 Operating lease cost (1)(2) Occupancy expenses $ 1,147 $ 1,657 $ 3,394 $ 4,060 (1) There were no variable lease costs for the three and nine months ended September 30, 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 September 30, 2021: (amounts in thousands) September 30, 2021 2021 $ 1,375 2022 5,060 2023 4,208 2024 3,177 2025 2,047 Thereafter 1,424 Total minimum payments 17,291 Less: interest 1,473 Present value of lease liabilities $ 15,818
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 September 30, 2021 and December 31, 2020: (amounts in thousands) September 30, 2021 December 31, 2020 Weighted average remaining lease term (years) Operating leases (1) 4.0 years 4.7 years Weighted average discount rate Operating leases (1) 2.65 % 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 September 30, 2021 and December 31, 2020: (amounts in thousands) Classification September 30, 2021 December 31, 2020 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 126,311 $ 104,982 Guaranteed residual assets Loans and leases receivable 11,609 12,988 Unguaranteed residual assets Loans and leases receivable 5,366 1,229 Deferred initial direct costs Loans and leases receivable 441 560 Unearned income Loans and leases receivable (7,439) (11,175) Net investment in direct financing leases $ 136,288 $ 108,584 Operating leases Investment in operating leases Other assets $ 142,488 $ 131,791 Accumulated depreciation Other assets (36,123) (28,919) Deferred initial direct costs Other assets 937 996 Net investment in operating leases 107,302 103,868 Total lease assets $ 243,590 $ 212,452

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
Borrowings (Tables)	Sep. 30, 2021
Debt Disclosure [Abstract]
Short Term Borrowings	Short-term debt at September 30, 2021 and December 31, 2020 was as follows: September 30, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ — — % $ 850,000 1.19 % Federal funds purchased — — % 250,000 0.09 % Total short-term debt $ — $ 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) September 30, 2021 (1) December 31, 2020 (2) FHLB advances Maximum outstanding at any month end $ 850,000 $ 910,000 Average balance during the period 333,396 809,788 Weighted-average interest rate during the period 2.47 % 2.31 % Federal funds purchased Maximum outstanding at any month end 365,000 842,000 Average balance during the period 29,286 239,481 Weighted-average interest rate during the period 0.07 % 0.19 % (1) For the nine months ended September 30, 2021. (2) For the year ended December 31, 2020.
Schedule of Long-term Debt	Long-term FHLB and FRB advances at September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 December 31, 2020 (dollars in thousands) Amount Rate Amount Rate FRB PPP Liquidity Facility advances $ — — % $ 4,415,016 0.35 % Total long-term FHLB and FRB advances $ — $ 4,415,016 The maximum borrowing capacity with the FHLB and FRB at September 30, 2021 and December 31, 2020 was as follows: (amounts in thousands) September 30, 2021 December 31, 2020 Total maximum borrowing capacity with the FHLB $ 2,789,580 $ 2,729,516 Total maximum borrowing capacity with the FRB (1) 186,841 223,299 Qualifying loans serving as collateral against FHLB and FRB advances (1) 3,613,109 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. Customers had no borrowings under the PPPLF at September 30, 2021. 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 September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 December 31, 2020 (dollars in thousands) Issued by Ranking Amount Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior (1) $ 98,809 $ — 2.875 % $ 100,000 August 2021 August 2031 100.000 % Customers Bancorp Senior 24,641 24,552 4.500 % 25,000 September 2019 September 2024 100.000 % Customers Bancorp Senior 99,701 99,485 3.950 % 100,000 June 2017 June 2022 99.775 % Total other borrowings $ 223,151 $ 124,037 Customers Bancorp Subordinated (2)(3) $ 72,358 $ 72,222 5.375 % $ 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (2)(4) 109,245 109,172 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 181,603 $ 181,394 (1) The senior notes will bear an annual fixed rate of 2.875% until August 15, 2026. From August 15, 2026 until maturity, the notes will bear an annual interest rate equal to a benchmark rate, which is expected to be the three-month term SOFR, plus 235 basis points. Customers Bancorp has the ability to call the senior notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after August 15, 2026. (2) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (3) 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.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
Shareholders' Equity (Tables)	Sep. 30, 2021
Equity [Abstract]
Schedule of Stock by Class	The table below summarizes Customers' issuances of preferred stock and the dividends paid per share. (amounts in thousands except share and per share data) Shares at Carrying value at December 31, Initial Fixed Rate Date at which dividend rate becomes floating and earliest redemption date Floating rate of Three-Month LIBOR Plus: Dividend Paid Per Share in 2021 (1) Fixed-to-floating rate: Issue Date September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Series C May 18, 2015 — 2,300,000 $ — $ 55,569 7.00 % June 15, 2020 5.300 % $ 1.04 Series D January 29, 2016 — 1,000,000 — 24,108 6.50 % March 15, 2021 5.090 % $ 1.08 Series E April 28, 2016 2,300,000 2,300,000 55,593 55,593 6.45 % June 15, 2021 5.140 % $ 1.14 Series F September 16, 2016 3,400,000 3,400,000 82,201 82,201 6.00 % December 15, 2021 4.762 % $ 1.13 Totals 5,700,000 9,000,000 $ 137,794 $ 217,471 (1) For the nine months ended September 30, 2021.

Regulatory Capital (Tables)

Regulatory Capital (Tables)	9 Months Ended
Regulatory Capital (Tables)	Sep. 30, 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 September 30, 2021: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,201,160 10.412 % $ 519,125 4.500 % N/A N/A $ 807,527 7.000 % Customers Bank $ 1,471,897 12.765 % $ 518,878 4.500 % $ 749,491 6.500 % $ 807,144 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,338,953 11.607 % $ 692,166 6.000 % N/A N/A $ 980,569 8.500 % Customers Bank $ 1,471,897 12.765 % $ 691,838 6.000 % $ 922,451 8.000 % $ 940,104 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,572,222 13.629 % $ 922,888 8.000 % N/A N/A $ 1,211,291 10.500 % Customers Bank $ 1,632,808 14.161 % $ 922,451 8.000 % $ 1,153,063 10.000 % $ 1,210,716 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,338,953 7.876 % $ 679,974 4.000 % N/A N/A $ 679,974 4.000 % Customers Bank $ 1,471,897 8.660 % $ 679,839 4.000 % $ 849,799 5.000 % $ 679,838 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)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The estimated fair values of Customers' financial instruments at September 30, 2021 and December 31, 2020 were as follows. Fair Value Measurements at September 30, 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 $ 1,052,054 $ 1,052,054 $ 1,052,054 $ — $ — Debt securities, available for sale 1,861,697 1,861,697 — 1,796,080 65,617 Loans held for sale 29,957 29,957 — 29,449 508 Total loans and leases receivable, net of allowance for credit losses on loans and leases 15,354,084 15,323,107 — 2,557,624 12,765,483 FHLB, Federal Reserve Bank and other restricted stock 57,184 57,184 — 57,184 — Derivatives 34,234 34,234 — 34,071 163 Liabilities: Deposits $ 16,971,025 $ 16,971,434 $ 16,377,876 $ 593,558 $ — Other borrowings 223,151 229,582 — 229,582 — Subordinated debt 181,603 200,080 — 200,080 — Derivatives 34,573 34,573 — 34,573 — 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 September 30, 2021 and December 31, 2020 were as follows: September 30, 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 $ — $ 159,840 $ 65,617 $ 225,457 Agency-guaranteed residential mortgage-backed securities — 9,666 — 9,666 Agency-guaranteed commercial mortgage-backed securities — 2,194 — 2,194 Agency-guaranteed residential collateralized mortgage obligations — 102,194 — 102,194 Agency-guaranteed commercial collateralized mortgage obligations — 141,808 — 141,808 Commercial mortgage-backed securities — 28,088 — 28,088 Collateralized loan obligations — 315,502 — 315,502 Corporate notes — 440,892 — 440,892 Private label collateralized mortgage obligations — 587,241 — 587,241 State and political subdivision debt securities — 8,655 — 8,655 Derivatives — 34,071 163 34,234 Loans held for sale – fair value option — 12,159 — 12,159 Loans receivable, mortgage warehouse – fair value option — 2,557,624 — 2,557,624 Total assets – recurring fair value measurements $ — $ 4,399,934 $ 65,780 $ 4,465,714 Liabilities Derivatives $ — $ 34,573 $ — $ 34,573 Measured at Fair Value on a Nonrecurring Basis: Assets Collateral-dependent loans $ — $ 17,290 $ 7,865 $ 25,155 Total assets – nonrecurring fair value measurements $ — $ 17,290 $ 7,865 $ 25,155 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 residential mortgage–backed securities — 63,091 — 63,091 Agency-guaranteed residential collateralized mortgage obligations — 140,841 — 140,841 Agency-guaranteed commercial collateralized mortgage obligations — 20,926 — 20,926 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 and nine months ended September 30, 2021 and 2020 are summarized in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 14 – DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments Three Months Ended September 30, (amounts in thousands) 2021 2020 Balance at June 30 $ 301 $ 52 Issuances 163 455 Settlements (301) (52) Balance at September 30 $ 163 $ 455 Residential Mortgage Loan Commitments Nine Months Ended September 30, (amounts in thousands) 2021 2020 Balance at December 31 $ 200 $ 79 Issuances 660 722 Settlements (697) (346) Balance at September 30 $ 163 $ 455
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 September 30, 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) September 30, 2021 Asset-backed securities $ 65,617 Discounted cash flow Discount rate Annualized loss rate Constant prepayment rate 4% - 6% (5%) 2% - 6% (4%) 12% - 25% (17%) Collateral-dependent loans – real estate 6,616 Collateral appraisal (1) Liquidation expenses (2) 5% - 9% (7%) Collateral-dependent loans – commercial and industrial 741 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 8% - 26% (12%) 20% - 20% (20%) Residential mortgage loan commitments 163 Adjusted market bid Pull-through rate 75% - 94% (83%) (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)	9 Months Ended
Derivative Instruments and Hedging Activities (Tables)	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	As of September 30, 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 September 30, December 31, September 30, December 31, (amounts in thousands) 2021 2020 2021 2020 Available for sale debt securities $ 80,500 $ 272,159 $ 846 $ 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 September 30, 2021 and December 31, 2020. September 30, 2021 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as fair value hedges: Interest rate swaps Other assets $ 846 Other liabilities $ — Total $ 846 $ — Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 32,905 Other liabilities $ 34,216 Interest rate caps Other assets 150 Other liabilities 150 Credit contracts Other assets 170 Other liabilities 207 Residential mortgage loan commitments Other assets 163 Other liabilities — Total $ 33,388 $ 34,573 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 and nine months ended September 30, 2021 and 2020. Amount of Income (Loss) Recognized in Earnings Three Months Ended September 30, Nine Months Ended September 30, (amounts in thousands) Income Statement Location 2021 2020 2021 2020 Derivatives designated as fair value hedges: Recognized on interest rate swaps Net interest income $ — $ — $ 4,777 $ — Recognized on hedged available for sale debt securities Net interest income — — (4,777) — Total $ — $ — $ — $ — Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 517 $ 387 $ 2,540 $ (6,191) Interest rate caps Other non-interest income — — — — Credit contracts Other non-interest income 7 162 81 1,436 Residential mortgage loan commitments Mortgage banking income (138) 403 (37) 376 Total $ 386 $ 952 $ 2,584 $ (4,379) Effect of Derivative Instruments on Comprehensive Income The following table presents the effect of Customers' derivative financial instruments on comprehensive income for the three and nine months ended September 30, 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 September 30, Three Months Ended (amounts in thousands) 2021 2020 2021 2020 Derivatives in cash flow hedging relationships: Interest rate swaps $ — $ 429 Interest expense $ — $ (4,400) 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 Nine Months Ended September 30, Nine Months Ended (amounts in thousands) 2021 2020 2021 2020 Derivatives in cash flow hedging relationships: Interest rate swaps $ 9,117 $ (24,602) Interest expense $ (2,505) $ (8,596) — — Other non-interest income (24,467) — Total $ 9,117 $ (24,602) $ (26,972) $ (8,596) (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 September 30, 2021 Interest rate derivative assets with institutional counterparties $ — $ — $ — $ — Interest rate derivative liabilities with institutional counterparties $ 31,693 $ — $ (31,693) $ — 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 September 30, 2021 Interest rate derivative assets with institutional counterparties $ — $ — $ — $ — Interest rate derivative liabilities with institutional counterparties $ 31,693 $ — $ (31,693) $ — 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)	Sep. 30, 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	May 31, 2021	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 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				$ 26,795	$ 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
Additional consideration from sale of non-controlling interest in BMT		$ 3,700
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			$ 15,100	$ 43,000
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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Discontinued operations:
Loss from discontinued operations before income taxes	$ 0	$ (347)	$ (20,354)	$ (10,259)
Income tax expense (benefit) from discontinued operations	0	185	17,682	(2,114)
Net loss from discontinued operations	0	(532)	(38,036)	(8,145)
BM Technologies Inc. \| Discontinued Operations, Disposed of by Sale
Discontinued operations:
Non-interest income	0	16,365	0	48,691
Non-interest expense	0	16,712	20,354	58,950
Loss from discontinued operations before income taxes	0	(347)	(20,354)	(10,259)
Income tax expense (benefit) from discontinued operations	0	185	17,682	(2,114)
Net loss from discontinued operations	$ 0	$ (532)	$ (38,036)	$ (8,145)

Discontinued Operations - Balan

Discontinued Operations - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income from continuing operations available to common shareholders	$ 110,241	$ 47,617	$ 239,523	$ 73,851
Net loss from discontinued operations	0	(532)	(38,036)	(8,145)
Net income available to common shareholders	$ 110,241	$ 47,085	$ 201,487	$ 65,706
Weighted-average number of common shares outstanding - basic (shares)	32,449,853	31,517,504	32,206,547	31,462,284
Share-based compensation plans (shares)	1,418,700	218,807	1,281,125	203,743
Weighted-average number of common shares - diluted (shares)	33,868,553	31,736,311	33,487,672	31,666,027
Basic earnings per common share from continuing operations (usd per share)	$ 3.40	$ 1.51	$ 7.44	$ 2.35
Basic earnings (loss) per common share from discontinued operations (usd per share)	0	(0.02)	(1.18)	(0.26)
Basic earnings (loss) per common share (usd per share)	3.40	1.49	6.26	2.09
Diluted earnings per common share from continuing operations (usd per share)	3.25	1.50	7.15	2.33
Diluted earnings (loss) per common share from discontinued operations (usd per share)	0	(0.02)	(1.13)	(0.26)
Diluted earnings (loss) per common share (usd per share)	$ 3.25	$ 1.48	$ 6.02	$ 2.07

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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based compensation awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities (shares)	710,000	862,417	711,000	862,417

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Loss) By Component (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 1,250,729	$ 1,007,847	$ 1,117,086	$ 1,052,795
Unrealized gains (losses) arising during period, before tax	958	(510)	14,271	(8,359)
Income tax effect	(249)	132	(3,711)	2,351
Other comprehensive income (loss) before reclassifications	709	(378)	10,560	(6,008)
Reclassification adjustments for (gains) losses included in net income, before tax	(6,063)	(7,307)	(4,469)	(11,439)
Income tax effect	1,576	1,899	1,161	2,946
Amounts reclassified from accumulated other comprehensive income (loss) to net income	(4,487)	(5,408)	(3,308)	(8,493)
Other comprehensive income (loss), net of income tax effect	(3,778)	(5,786)	7,252	(14,501)
Ending balance	1,284,299	1,051,491	1,284,299	1,051,491
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	5,266	(9,965)	(5,764)	(1,250)
Other comprehensive income (loss), net of income tax effect	(3,778)	(5,786)	7,252	(14,501)
Ending balance	1,488	(15,751)	1,488	(15,751)
Unrealized Gains (Losses) on Available for Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	5,266	27,525	23,312	14,287
Unrealized gains (losses) arising during period, before tax	958	(1,090)	1,950	25,127
Income tax effect	(249)	283	(507)	(6,533)
Other comprehensive income (loss) before reclassifications	709	(807)	1,443	18,594
Reclassification adjustments for (gains) losses included in net income, before tax	(6,063)	(11,707)	(31,441)	(20,035)
Income tax effect	1,576	3,044	8,174	5,209
Amounts reclassified from accumulated other comprehensive income (loss) to net income	(4,487)	(8,663)	(23,267)	(14,826)
Other comprehensive income (loss), net of income tax effect	(3,778)	(9,470)	(21,824)	3,768
Ending balance	1,488	18,055	1,488	18,055
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0	(37,490)	(29,076)	(15,537)
Unrealized gains (losses) arising during period, before tax	0	580	12,321	(33,486)
Income tax effect	0	(151)	(3,204)	8,884
Other comprehensive income (loss) before reclassifications	0	429	9,117	(24,602)
Reclassification adjustments for (gains) losses included in net income, before tax	0	4,400	26,972	8,596
Income tax effect	0	(1,145)	(7,013)	(2,263)
Amounts reclassified from accumulated other comprehensive income (loss) to net income	0	3,255	19,959	6,333
Other comprehensive income (loss), net of income tax effect	0	3,684	29,076	(18,269)
Ending balance	$ 0	$ (33,806)	$ 0	$ (33,806)

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,860,529	$ 1,174,188
Gross Unrealized Gains	5,780	32,890
Gross Unrealized Losses	(4,612)	(647)
Fair Value	1,861,697	1,206,431
Equity securities	5,000	3,854
Investment securities, at fair value	1,866,697	1,210,285
Available-for-sale debt securities, accrued interest	6,300	4,200
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	225,182	372,640
Gross Unrealized Gains	400	4,515
Gross Unrealized Losses	(125)	(10)
Fair Value	225,457	377,145
U.S. government agencies securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		20,000
Gross Unrealized Gains		34
Gross Unrealized Losses		0
Fair Value		20,034
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,924	61,178
Gross Unrealized Gains	0	1,913
Gross Unrealized Losses	(258)	0
Fair Value	9,666	63,091
Agency-guaranteed commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,184
Gross Unrealized Gains	10
Gross Unrealized Losses	0
Fair Value	2,194
Agency-guaranteed residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	102,110	139,985
Gross Unrealized Gains	174	916
Gross Unrealized Losses	(90)	(60)
Fair Value	102,194	140,841
Agency-guaranteed commercial collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	143,858	20,965
Gross Unrealized Gains	56	0
Gross Unrealized Losses	(2,106)	(39)
Fair Value	141,808	20,926
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	315,501	32,367
Gross Unrealized Gains	110	0
Gross Unrealized Losses	(109)	0
Fair Value	315,502	32,367
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	28,035
Gross Unrealized Gains	53
Gross Unrealized Losses	0
Fair Value	28,088
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	437,179	372,764
Gross Unrealized Gains	4,260	24,144
Gross Unrealized Losses	(547)	(164)
Fair Value	440,892	396,744
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	588,017	136,943
Gross Unrealized Gains	601	423
Gross Unrealized Losses	(1,377)	(374)
Fair Value	587,241	136,992
State and political subdivision debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,539	17,346
Gross Unrealized Gains	116	945
Gross Unrealized Losses	0	0
Fair Value	$ 8,655	$ 18,291

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2021USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021security	Sep. 30, 2021contract	Dec. 31, 2020USD ($)security
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of foreign subsidiaries				$ 3,765	$ 0
Loss on sale of foreign subsidiaries	$ (2,800)	$ 0	$ 0	(2,840)	0
Unrealized gain (loss) on investment securities			200	2,700	(100)
Proceeds from sales of investment securities available for sale		258,400	268,600	666,023	377,767
Realized gain		6,100	$ 11,700	31,400	$ 20,000
Number of available-for-sale investment securities, unrealized loss position, less than twelve month category \| security						35
Number of available-for-sale investment securities, unrealized loss position, twelve month or more category \| contract							1
Number of available-for-sale investment securities, unrealized loss position						36	36	16
Pledged investment securities fair value		$ 12,400		$ 12,400				$ 18,800

Investment Securities - Summa_2

Investment Securities - Summary of Available-for-Sale Debt Securities by Stated Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Due in one year or less, amortized cost	$ 4,932
Due after one years through five years, amortized cost	280,813
Due after five through ten years, amortized cost	156,973
Due after ten years, amortized cost	3,000
Amortized Cost	1,860,529	$ 1,174,188
Due in one year or less, fair value	5,022
Due after one years through five years, fair value	282,050
Due after five through ten years, fair value	159,475
Due after ten years, fair value	3,000
Total Debt Securities Fair Value	1,861,697	1,206,431
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	225,182
Amortized Cost	225,182	372,640
Debt securities, available-for-sale, without single maturity date, fair value	225,457
Total Debt Securities Fair Value	225,457	377,145
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	315,501
Amortized Cost	315,501	32,367
Debt securities, available-for-sale, without single maturity date, fair value	315,502
Total Debt Securities Fair Value	315,502	32,367
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	28,035
Amortized Cost	28,035
Debt securities, available-for-sale, without single maturity date, fair value	28,088
Total Debt Securities Fair Value	28,088
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	9,924
Amortized Cost	9,924	61,178
Debt securities, available-for-sale, without single maturity date, fair value	9,666
Total Debt Securities Fair Value	9,666	63,091
Agency-guaranteed commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	2,184
Amortized Cost	2,184
Debt securities, available-for-sale, without single maturity date, fair value	2,194
Total Debt Securities Fair Value	2,194
Agency-guaranteed residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	102,110
Amortized Cost	102,110	139,985
Debt securities, available-for-sale, without single maturity date, fair value	102,194
Total Debt Securities Fair Value	102,194	140,841
Agency-guaranteed commercial collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	143,858
Amortized Cost	143,858	20,965
Debt securities, available-for-sale, without single maturity date, fair value	141,808
Total Debt Securities Fair Value	141,808	20,926
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	588,017
Amortized Cost	588,017	136,943
Debt securities, available-for-sale, without single maturity date, fair value	587,241
Total Debt Securities Fair Value	$ 587,241	$ 136,992

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) $ in Thousands	Sep. 30, 2021USD ($)
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	$ 487,009
Less than 12 Months, Unrealized Losses	(4,569)
12 Months or More, Fair Value	1,957
12 Months or More, Unrealized Losses	(43)
Fair Value, Total	488,966
Unrealized Losses	(4,612)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	21,800
Less than 12 Months, Unrealized Losses	(125)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	21,800
Unrealized Losses	(125)
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	9,666
Less than 12 Months, Unrealized Losses	(258)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	9,666
Unrealized Losses	(258)
Agency-guaranteed commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	0
Less than 12 Months, Unrealized Losses	0
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	0
Unrealized Losses	0
Agency-guaranteed residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	25,548
Less than 12 Months, Unrealized Losses	(90)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	25,548
Unrealized Losses	(90)
Agency-guaranteed commercial collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	121,156
Less than 12 Months, Unrealized Losses	(2,106)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	121,156
Unrealized Losses	(2,106)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	71,508
Less than 12 Months, Unrealized Losses	(109)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	71,508
Unrealized Losses	(109)
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	98,662
Less than 12 Months, Unrealized Losses	(504)
12 Months or More, Fair Value	1,957
12 Months or More, Unrealized Losses	(43)
Fair Value, Total	100,619
Unrealized Losses	(547)
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	138,669
Less than 12 Months, Unrealized Losses	(1,377)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	138,669
Unrealized Losses	$ (1,377)

Loans Held for Sale - Compositi

Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Receivables Held-for-sale [Abstract]
Multi-family loans, at lower of cost or fair value	$ 17,290	$ 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	17,290	72,934
Home equity conversion mortgages, at lower of cost or fair value	508	643
Residential mortgage loans, at fair value	12,159	5,509
Total consumer loans held for sale	12,667	6,152
Loans held for sale	$ 29,957	$ 79,086

Loans Held for Sale - Narrative

Loans Held for Sale - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Receivables Held-for-sale [Abstract]
Loans held-for-sale (including nonperforming loans)	$ 0.5	$ 18.5

Loans and Leases Receivable a_3

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loans and Leases Receivable (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, mortgage warehouse, at fair value	$ 2,557,624		$ 3,616,432
Loans receivable, PPP	4,957,357		4,561,365
Loans and leases receivable	7,970,599		7,575,368
Allowance for credit losses on loans and leases	(131,496)	$ (125,436)	(144,176)	$ (155,561)	$ (159,905)	$ (56,379)
Total loans and leases receivable, net of allowance for credit losses on loans and leases	15,354,084		15,608,989
Deferred (fees) costs and unamortized (discounts) premiums, net	(131,200)		(54,600)
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,369,876		1,761,301
Allowance for credit losses on loans and leases	(4,397)	(5,028)	(12,620)	(15,026)	(14,697)	(6,157)
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	198,607		140,905
Allowance for credit losses on loans and leases	(886)	(2,643)	(5,871)	(6,423)	(5,297)	(1,262)
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	248,153		317,170
Allowance for credit losses on loans and leases	(1,912)	(2,299)	(3,977)	(4,649)	(4,550)	(3,218)
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	55,635		62,243
Allowance for credit losses on loans and leases	(4,410)	(4,372)	(5,190)	(5,625)	(6,014)	(1,060)
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,624,415		1,235,406
Allowance for credit losses on loans and leases	(98,039)	$ (91,129)	(75,315)	$ (81,160)	$ (79,147)	$ (20,648)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	6,042,396		5,960,549
Commercial \| Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,369,876		1,761,301
Commercial \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,673,226		2,289,441
Commercial \| Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	656,044		572,338
Commercial \| Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,144,643		1,196,564
Commercial \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	198,607		140,905
Commercial \| Direct Finance Equipment Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	135,800		108,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,928,203		1,614,819
Consumer \| Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	248,153		317,170
Consumer \| Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	55,635		62,243
Consumer \| Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 1,624,415		$ 1,235,406

Loans and Leases Receivable a_4

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Additional Information (Detail)	Sep. 30, 2021USD ($)Commitment	Dec. 31, 2020USD ($)Commitment	Sep. 30, 2021USD ($)LoanCommitment	Sep. 30, 2020USD ($)Loan	Sep. 30, 2021USD ($)LoanCommitment	Sep. 30, 2020USD ($)Loan	Dec. 31, 2020USD ($)Commitment	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrued interest	$ 87,700,000	$ 76,600,000	$ 87,700,000		$ 87,700,000		$ 76,600,000
Loans receivable, excluding accrued interest	15,354,084,000	15,608,989,000	15,354,084,000		15,354,084,000		15,608,989,000
Loans and leases receivable	7,970,599,000	7,575,368,000	7,970,599,000		7,970,599,000		7,575,368,000
Interest income			233,097,000	$ 132,107,000	$ 538,822,000	$ 366,634,000
Loans held for sale, average life from purchase to sale					30 days
Allowance for credit loss, excluding accrued interest	131,496,000	144,176,000	131,496,000	$ 155,561,000	$ 131,496,000	$ 155,561,000	144,176,000	$ 125,436,000	$ 159,905,000	$ 56,379,000
Allowance for credit loss, period decrease					12,700,000
Loans reported as TDR	17,000,000	16,100,000	17,000,000		$ 17,000,000		16,100,000
Minimum performance requirement (months)					6 months
Lease receivable, TDR	$ 0	$ 0	$ 0		$ 0		$ 0
Number of loans \| Loan			43	67	174	105
Number of commitments to lend additional funds (commitment) \| Commitment	0	0	0		0		0
Purchased-credit-impaired loans	$ 11,000,000	$ 13,400,000			$ 11,000,000		$ 13,400,000
Loans pledged as collateral	3,700,000,000	8,500,000,000	$ 3,700,000,000		$ 3,700,000,000		8,500,000,000
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 and leases receivable	5,000,000,000	4,600,000,000	5,000,000,000		$ 5,000,000,000		4,600,000,000
Interest income			117,100,000	$ 24,300,000	197,100,000	$ 36,000,000
Commercial real estate non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amount deferred, CARES Act	73,400,000	202,100,000	73,400,000		73,400,000		202,100,000
Consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amount deferred, CARES Act	6,700,000	16,400,000	$ 6,700,000		$ 6,700,000		16,400,000
Forgiveness of debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan			0	0	0	0
Commercial Real Estate \| Commercial and industrial \| Collateral Dependent Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans receivable, excluding accrued interest	$ 41,600,000	59,500,000	$ 41,600,000		$ 41,600,000		59,500,000
Government-Guaranteed Collateral \| Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans pledged as collateral		$ 4,600,000,000					$ 4,600,000,000

Loans and Leases Receivable a_5

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Performance Status (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 7,970,599	$ 7,575,368	$ 7,970,599	$ 7,575,368
Threshold period past due	30 days		30 days
Loans receivable, PPP	$ 4,957,357	4,561,365	$ 4,957,357	4,561,365
Purchased-credit-impaired loans	11,000	13,400	11,000	13,400
Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	87,483	62,045	87,483	62,045
30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	11,604	21,633	11,604	21,633
60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	29,025	13,812	29,025	13,812
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	46,854	26,600	46,854	26,600
Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	7,883,116	7,513,323	7,883,116	7,513,323
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,369,876	1,761,301	1,369,876	1,761,301
Multi-family \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	33,028	24,324	33,028	24,324
Multi-family \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	4,193	0	4,193
Multi-family \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	8,896	5,224	8,896	5,224
Multi-family \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	24,132	14,907	24,132	14,907
Multi-family \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,336,848	1,736,977	1,336,848	1,736,977
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,673,226	2,289,441	2,673,226	2,289,441
Commercial and industrial \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	11,109	6,610	11,109	6,610
Commercial and industrial \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,970	2,257	1,970	2,257
Commercial and industrial \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,433	1,274	2,433	1,274
Commercial and industrial \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	6,706	3,079	6,706	3,079
Commercial and industrial \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,662,117	2,282,831	2,662,117	2,282,831
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	656,044	572,338	656,044	572,338
Commercial real estate owner occupied \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,677	4,558	1,677	4,558
Commercial real estate owner occupied \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	864	0	864
Commercial real estate owner occupied \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	326	1,324	326	1,324
Commercial real estate owner occupied \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,351	2,370	1,351	2,370
Commercial real estate owner occupied \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	654,367	567,780	654,367	567,780
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,144,643	1,196,564	1,144,643	1,196,564
Commercial real estate non-owner occupied \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	15,640	2,416	15,640	2,416
Commercial real estate non-owner occupied \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0	0	0
Commercial real estate non-owner occupied \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	12,795	60	12,795	60
Commercial real estate non-owner occupied \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,845	2,356	2,845	2,356
Commercial real estate non-owner occupied \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,129,003	1,194,148	1,129,003	1,194,148
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	198,607	140,905	198,607	140,905
Construction \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0	0	0
Construction \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0	0	0
Construction \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0	0	0
Construction \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0	0	0
Construction \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	198,607	140,905	198,607	140,905
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	248,153	317,170	248,153	317,170
Residential real estate \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	4,658	10,323	4,658	10,323
Residential real estate \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,042	6,640	1,042	6,640
Residential real estate \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	795	1,827	795	1,827
Residential real estate \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,821	1,856	2,821	1,856
Residential real estate \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	243,495	306,847	243,495	306,847
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	55,635	62,243	55,635	62,243
Manufactured housing \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	8,647	4,142	8,647	4,142
Manufactured housing \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,967	1,518	2,967	1,518
Manufactured housing \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	225	673	225	673
Manufactured housing \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	5,455	1,951	5,455	1,951
Manufactured housing \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	46,988	58,101	46,988	58,101
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,624,415	1,235,406	1,624,415	1,235,406
Installment \| Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	12,724	9,672	12,724	9,672
Installment \| 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	5,625	6,161	5,625	6,161
Installment \| 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	3,555	3,430	3,555	3,430
Installment \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	3,544	81	3,544	81
Installment \| Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 1,611,691	$ 1,225,734	$ 1,611,691	$ 1,225,734

Loans and Leases Receivable a_6

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Summary of Amortized Cost of Loans and Leases on Nonaccrual Status (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	$ 44,077	$ 40,862
Nonaccrual loans with related allowance	7,457	11,177
Total nonaccrual loans	51,534	52,039
Multi-family
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	24,524	18,800
Nonaccrual loans with related allowance	0	2,928
Total nonaccrual loans	24,524	21,728
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	6,558	6,384
Nonaccrual loans with related allowance	393	2,069
Total nonaccrual loans	6,951	8,453
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	2,412	3,411
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	2,412	3,411
Commercial real estate non-owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	2,845	2,356
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	2,845	2,356
Residential real estate
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	7,738	9,911
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	7,738	9,911
Manufactured housing
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	3,520	2,969
Total nonaccrual loans	3,520	2,969
Installment
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	3,544	3,211
Total nonaccrual loans	$ 3,544	$ 3,211

Loans and Leases Receivable a_7

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 125,436	$ 159,905	$ 144,176	$ 56,379
Charge-offs	(8,755)	(21,946)	(31,361)	(52,212)
Recoveries	1,651	4,647	5,145	5,877
Provision (benefit) for credit losses	13,164	12,955	13,536	65,688
Ending balance	131,496	155,561	131,496	155,561
Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5,028	14,697	12,620	6,157
Charge-offs	0	0	(1,132)	0
Recoveries	0	0	0	0
Provision (benefit) for credit losses	(631)	329	(7,091)	6,698
Ending balance	4,397	15,026	4,397	15,026
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	8,127	12,302	12,239	15,556
Charge-offs	(516)	(2,527)	(1,153)	(2,645)
Recoveries	400	2,582	945	2,661
Provision (benefit) for credit losses	2,849	569	(1,171)	(3,405)
Ending balance	10,860	12,926	10,860	12,926
Commercial real estate owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4,464	11,405	9,512	2,235
Charge-offs	(524)	(44)	(666)	(44)
Recoveries	474	0	483	5
Provision (benefit) for credit losses	(797)	(1,809)	(5,712)	1,583
Ending balance	3,617	9,552	3,617	9,552
Commercial real estate non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	7,374	26,493	19,452	6,243
Charge-offs	(943)	(10,181)	(943)	(25,779)
Recoveries	0	1,258	69	1,258
Provision (benefit) for credit losses	944	2,630	(11,203)	30,560
Ending balance	7,375	20,200	7,375	20,200
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,643	5,297	5,871	1,262
Charge-offs	0	0	0	0
Recoveries	3	6	122	122
Provision (benefit) for credit losses	(1,760)	1,120	(5,107)	5,137
Ending balance	886	6,423	886	6,423
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,299	4,550	3,977	3,218
Charge-offs	(79)	0	(129)	0
Recoveries	25	17	47	72
Provision (benefit) for credit losses	(333)	82	(1,983)	(159)
Ending balance	1,912	4,649	1,912	4,649
Manufactured housing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4,372	6,014	5,190	1,060
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit) for credit losses	38	(389)	(780)	763
Ending balance	4,410	5,625	4,410	5,625
Installment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	91,129	79,147	75,315	20,648
Charge-offs	(6,693)	(9,194)	(27,338)	(23,744)
Recoveries	749	784	3,479	1,759
Provision (benefit) for credit losses	12,854	10,423	46,583	24,511
Ending balance	$ 98,039	$ 81,160	$ 98,039	81,160
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 on Loans and Leases - Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)Loan	Sep. 30, 2020USD ($)Loan	Sep. 30, 2021USD ($)Loan	Sep. 30, 2020USD ($)Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	43	67	174	105
Recorded investment \| $	$ 931	$ 1,473	$ 2,954	$ 3,231
Extensions of maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	0	0	0	6
Recorded investment \| $	$ 0	$ 0	$ 0	$ 385
Interest-rate reductions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	4	2	16	34
Recorded investment \| $	$ 244	$ 88	$ 585	$ 1,461
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	39	65	158	65
Recorded investment \| $	$ 687	$ 1,385	$ 2,369	$ 1,385

Loans and Leases Receivable a_9

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Summary of Loans Modified in Troubled Debt Restructurings and Related Recorded Investment (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)Loan	Sep. 30, 2020USD ($)Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	21	15
Recorded Investment \| $	$ 302	$ 1,374
Manufactured housing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	2	5
Recorded Investment \| $	$ 71	$ 201
Commercial real estate owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	0	1
Recorded Investment \| $	$ 0	$ 952
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	0	1
Recorded Investment \| $	$ 0	$ 95
Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| Loan	19	8
Recorded Investment \| $	$ 231	$ 126

Loans and Leases Receivable _10

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Credit Ratings (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	$ 1,700,985	$ 1,515,239
Fiscal year before current year	1,249,900	1,599,431
Two years before current year	1,154,989	786,506
Three years before current year	620,329	1,055,134
Four years before current year	786,670	578,390
Prior	1,259,055	1,130,969
Revolving loans amortized cost basis	1,198,671	909,699
Revolving loans converted to term	0	0
Loans and leases receivable	7,970,599	7,575,368
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	6,042,396	5,960,549
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	1,928,203	1,614,819
Commercial loans and leases receivable \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	990,168	1,188,773
Fiscal year before current year	835,217	791,958
Two years before current year	701,421	663,454
Three years before current year	538,678	1,038,646
Four years before current year	777,019	538,340
Prior	1,109,633	994,535
Revolving loans amortized cost basis	1,090,260	744,843
Revolving loans converted to term	0	0
Loans and leases receivable	6,042,396	5,960,549
Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	1,369,876	1,761,301
Multi-family \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	126,265	150,835
Fiscal year before current year	132,433	23,716
Two years before current year	22,974	299,319
Three years before current year	237,557	590,608
Four years before current year	376,046	245,946
Prior	474,601	450,877
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	1,369,876	1,761,301
Multi-family \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	126,265	150,835
Fiscal year before current year	132,433	23,716
Two years before current year	22,974	299,319
Three years before current year	232,655	535,510
Four years before current year	331,909	227,296
Prior	422,484	420,809
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	1,268,720	1,657,485
Multi-family \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	0	0
Three years before current year	4,902	20,901
Four years before current year	2,773	10,394
Prior	18,029	26,708
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	25,704	58,003
Multi-family \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	0	0
Three years before current year	0	34,197
Four years before current year	41,364	8,256
Prior	34,088	3,360
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	75,452	45,813
Multi-family \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	0	0
Three years before current year	0	0
Four years before current year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	0	0
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	2,673,226	2,289,441
Commercial and industrial \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	587,400	752,438
Fiscal year before current year	394,979	381,057
Two years before current year	289,360	161,444
Three years before current year	111,324	122,807
Four years before current year	100,224	54,201
Prior	101,792	74,245
Revolving loans amortized cost basis	1,088,147	743,249
Revolving loans converted to term	0	0
Loans and leases receivable	2,673,226	2,289,441
Commercial and industrial \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	568,013	729,270
Fiscal year before current year	381,413	373,050
Two years before current year	276,126	141,943
Three years before current year	94,175	116,793
Four years before current year	93,126	45,367
Prior	94,554	71,502
Revolving loans amortized cost basis	1,067,761	717,007
Revolving loans converted to term	0	0
Loans and leases receivable	2,575,168	2,194,932
Commercial and industrial \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	19,387	13,200
Fiscal year before current year	3,186	1,117
Two years before current year	5,750	436
Three years before current year	5,084	113
Four years before current year	0	516
Prior	210	21
Revolving loans amortized cost basis	13,171	17,524
Revolving loans converted to term	0	0
Loans and leases receivable	46,788	32,927
Commercial and industrial \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	9,968
Fiscal year before current year	10,380	6,890
Two years before current year	7,484	19,065
Three years before current year	12,065	5,901
Four years before current year	7,098	8,318
Prior	7,028	2,722
Revolving loans amortized cost basis	7,215	8,718
Revolving loans converted to term	0	0
Loans and leases receivable	51,270	61,582
Commercial and industrial \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	0	0
Three years before current year	0	0
Four years before current year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	0	0
Commercial real estate owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	656,044	572,338
Commercial real estate owner occupied \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	153,865	82,343
Fiscal year before current year	83,893	176,289
Two years before current year	148,946	82,114
Three years before current year	72,532	80,040
Four years before current year	70,106	48,741
Prior	126,030	102,070
Revolving loans amortized cost basis	672	741
Revolving loans converted to term	0	0
Loans and leases receivable	656,044	572,338
Commercial real estate owner occupied \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	153,865	82,343
Fiscal year before current year	83,893	168,977
Two years before current year	142,061	72,615
Three years before current year	62,723	70,642
Four years before current year	59,116	46,510
Prior	114,479	91,798
Revolving loans amortized cost basis	672	741
Revolving loans converted to term	0	0
Loans and leases receivable	616,809	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 year	0	4,464
Two years before current year	0	0
Three years before current year	318	9,056
Four years before current year	2,058	0
Prior	579	555
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	2,955	14,075
Commercial real estate owner occupied \| Substandard \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	2,848
Two years before current year	6,885	9,499
Three years before current year	9,491	342
Four years before current year	8,932	2,231
Prior	10,972	9,717
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	36,280	24,637
Commercial real estate owner occupied \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	0	0
Three years before current year	0	0
Four years before current year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	0	0
Commercial real estate non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	1,144,643	1,196,564
Commercial real estate non-owner occupied \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	109,585	183,225
Fiscal year before current year	179,514	105,430
Two years before current year	114,802	115,623
Three years before current year	112,396	245,191
Four years before current year	230,643	179,752
Prior	397,703	367,343
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	1,144,643	1,196,564
Commercial real estate non-owner occupied \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	109,585	143,231
Fiscal year before current year	157,702	105,430
Two years before current year	103,630	97,882
Three years before current year	66,994	157,835
Four years before current year	166,532	155,168
Prior	324,225	313,559
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	928,668	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 year	21,812	0
Two years before current year	11,172	0
Three years before current year	9,445	66,745
Four years before current year	43,500	24,218
Prior	32,777	14,613
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	118,706	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 year	0	0
Two years before current year	0	17,741
Three years before current year	35,957	20,611
Four years before current year	20,611	366
Prior	40,701	39,171
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	97,269	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 year	0	0
Two years before current year	0
Three years before current year	0	0
Four years before current year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	0	0
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	198,607	140,905
Construction \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	13,053	19,932
Fiscal year before current year	44,398	105,466
Two years before current year	125,339	4,954
Three years before current year	4,869	0
Four years before current year	0	9,700
Prior	9,507	0
Revolving loans amortized cost basis	1,441	853
Revolving loans converted to term	0	0
Loans and leases receivable	198,607	140,905
Construction \| Pass \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	13,053	19,932
Fiscal year before current year	42,888	105,466
Two years before current year	125,339	4,954
Three years before current year	4,869	0
Four years before current year	0	9,700
Prior	9,507	0
Revolving loans amortized cost basis	1,441	853
Revolving loans converted to term	0	0
Loans and leases receivable	197,097	140,905
Construction \| Special mention \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	1,510	0
Two years before current year	0	0
Three years before current year	0	0
Four years before current year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
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 year	0	0
Two years before current year	0	0
Three years before current year	0	0
Four years before current year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	0	0
Construction \| Doubtful \| Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	0	0
Three years before current year	0	0
Four years before current year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	0	0
Consumer loans \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	710,817	326,466
Fiscal year before current year	414,683	807,473
Two years before current year	453,568	123,052
Three years before current year	81,651	16,488
Four years before current year	9,651	40,050
Prior	149,422	136,434
Revolving loans amortized cost basis	108,411	164,856
Revolving loans converted to term	0	0
Loans and leases receivable	1,928,203	1,614,819
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	248,153	317,170
Residential real estate \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	4,481	6,708
Fiscal year before current year	8,272	13,617
Two years before current year	13,877	6,970
Three years before current year	12,433	11,635
Four years before current year	7,404	39,493
Prior	93,275	73,891
Revolving loans amortized cost basis	108,411	164,856
Revolving loans converted to term	0	0
Loans and leases receivable	248,153	317,170
Residential real estate \| Consumer \| Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	4,481	6,708
Fiscal year before current year	8,272	13,617
Two years before current year	13,738	6,810
Three years before current year	11,413	10,850
Four years before current year	6,735	38,143
Prior	89,259	69,496
Revolving loans amortized cost basis	106,649	161,576
Revolving loans converted to term	0	0
Loans and leases receivable	240,547	307,200
Residential real estate \| Consumer \| Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	139	160
Three years before current year	1,020	785
Four years before current year	669	1,350
Prior	4,016	4,395
Revolving loans amortized cost basis	1,762	3,280
Revolving loans converted to term	0	0
Loans and leases receivable	7,606	9,970
Manufactured housing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	55,635	62,243
Manufactured housing \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	295
Two years before current year	293	609
Three years before current year	304	76
Four years before current year	75	41
Prior	54,963	61,222
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	55,635	62,243
Manufactured housing \| Consumer \| Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	295
Two years before current year	293	609
Three years before current year	304	76
Four years before current year	75	41
Prior	49,606	56,837
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	50,278	57,858
Manufactured housing \| Consumer \| Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Fiscal year before current year	0	0
Two years before current year	0	0
Three years before current year	0	0
Four years before current year	0	0
Prior	5,357	4,385
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	5,357	4,385
Installment
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable	1,624,415	1,235,406
Installment \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	706,336	319,758
Fiscal year before current year	406,411	793,561
Two years before current year	439,398	115,473
Three years before current year	68,914	4,777
Four years before current year	2,172	516
Prior	1,184	1,321
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	1,624,415	1,235,406
Installment \| Consumer \| Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	706,050	319,453
Fiscal year before current year	405,796	791,235
Two years before current year	437,711	114,988
Three years before current year	68,720	4,736
Four years before current year	2,168	514
Prior	1,123	1,204
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	1,621,568	1,232,130
Installment \| Consumer \| Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	286	305
Fiscal year before current year	615	2,326
Two years before current year	1,687	485
Three years before current year	194	41
Four years before current year	4	2
Prior	61	117
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Loans and leases receivable	$ 2,847	$ 3,276

Loans and Leases Receivable _11

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 652,176	$ 15,700	$ 1,389,512	$ 225,963
Sales	$ 130,350	$ 21,568	$ 260,851	$ 23,390
Purchase price as a percentage of loans outstanding	99.20%	98.10%	101.00%	100.20%
Net gain on sale of loans	$ 5,800	$ 300	$ 10,100	$ 300
Loans receivable, PPP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	602,175	0	1,223,662	0
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	0	19,443	0
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	6,176	3,968	35,166	3,968
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	5,728	0	12,426	0
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	17,600	18,366	17,600
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	495
Sales	14,549	0	42,735	0
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	50,001	15,700	165,850	225,468
Sales	$ 103,897	$ 0	$ 132,715	$ 1,822

Leases - Lessee Narrative (Deta

Leases - Lessee Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Leases - Lessee Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	15 years		15 years
Operating cash flows from operating leases	$ 1.3	$ 1.2	$ 3.8	$ 4.1
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	3 months		3 months
Lessee, operating lease, term	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	6 years		6 years
Lessee, operating lease, term	5 years		5 years

Leases - Right-of-Use Assets an

Leases - Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 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	$ 14,598	$ 16,578
LIABILITIES
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities	Other Liabilities
Operating lease liabilities	$ 15,818	$ 18,005

Leases - Lease, Cost (Details)

Leases - Lease, Cost (Details) - USD ($)	3 Months Ended		9 Months Ended
Leases - Lease, Cost (Details) - USD ($)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease cost	$ 1,147,000	$ 1,657,000	$ 3,394,000	$ 4,060,000
Variable lease cost	$ 0	$ 0	$ 0	$ 0

Leases - Maturities of Non-canc

Leases - Maturities of Non-cancelable Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
2021	$ 1,375
2022	5,060
2023	4,208
2024	3,177
2025	2,047
Thereafter	1,424
Total minimum payments	17,291
Less: interest	1,473
Present value of lease liabilities	$ 15,818	$ 18,005

Leases - Summary of Lease Term

Leases - Summary of Lease Term and Discount Rate (Details)	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease, weighted average remaining lease term (years)	4 years	4 years 8 months 12 days
Operating lease, weighted average discount rate, percent	2.65%	2.90%

Leases - Lessor Narrative (Deta

Leases - Lessor Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
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	$ 26.3	$ 30.4
COVID-19 \| Operating Leases
Lessor, Lease, Description [Line Items]
Book value	$ 7.7	$ 15.2

Leases - Lessor, Lease Receivab

Leases - Lessor, Lease Receivables and Investment in Operating Leases and their Corresponding Balance Sheet Location (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Direct financing leases
Lease receivables	$ 126,311	$ 104,982
Guaranteed residual assets	11,609	12,988
Unguaranteed residual assets	5,366	1,229
Deferred initial direct costs	441	560
Unearned income	(7,439)	(11,175)
Net investment in direct financing leases	136,288	108,584
Operating leases
Investment in operating leases	142,488	131,791
Accumulated depreciation	(36,123)	(28,919)
Deferred initial direct costs	937	996
Net investment in operating leases	107,302	103,868
Total lease assets	$ 243,590	$ 212,452

Borrowings - Short Term Borrowi

Borrowings - Short Term Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
FHLB advances	$ 0	$ 850,000
Federal funds purchased	0	250,000
Total short-term debt	$ 0	$ 1,100,000
FHLB advances, rate	0.00%	1.19%
Federal funds purchased, rate	0.00%	0.09%

Borrowings - Summary of Bancorp

Borrowings - Summary of Bancorps Short Term Borrowings (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 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	$ 333,396	$ 809,788
Weighted-average interest rate during the period	2.47%	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	$ 29,286	$ 239,481
Weighted-average interest rate during the period	0.07%	0.19%

Borrowings - Narrative (Detail)

Borrowings - Narrative (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Federal Funds Purchased
Debt Instrument [Line Items]
Aggregate availability under federal funds line	$ 1,400	$ 924

Borrowings - FHLB and FRB Advan

Borrowings - FHLB and FRB Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
FRB PPP Liquidity Facility advances	$ 0	$ 4,415,016
Total long-term debt	$ 0	$ 4,415,016
FRB PPP Liquidity Facility advances, interest rate	0.00%	0.35%
Total maximum borrowing capacity with the FHLB	$ 2,789,580	$ 2,729,516
Total maximum borrowing capacity with the FRB	186,841	223,299
Qualifying loans serving as collateral against FHLB and FRB advances	3,613,109	3,363,364
FRB PPP liquidity facility	$ 0	$ 4,415,016

Borrowings - Long-term Debt (De

Borrowings - Long-term Debt (Details) - USD ($)	9 Months Ended
Borrowings - Long-term Debt (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Amount	$ 0	$ 4,415,016,000
Senior Notes
Debt Instrument [Line Items]
Amount	223,151,000	124,037,000
Senior Subordinated Notes
Debt Instrument [Line Items]
Amount	181,603,000	181,394,000
Maturing August 2031 \| Senior Notes
Debt Instrument [Line Items]
Amount	$ 98,809,000	0
Rate	2.875%
Issued Amount	$ 100,000,000
Price	100.00%
Maturing September 2024 \| Senior Notes
Debt Instrument [Line Items]
Amount	$ 24,641,000	24,552,000
Rate	4.50%
Issued Amount	$ 25,000,000
Price	100.00%
Maturing June 2022 \| Senior Notes
Debt Instrument [Line Items]
Amount	$ 99,701,000	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	$ 72,358,000	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	$ 109,245,000	$ 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%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maturing August 2031 \| Senior Notes
Debt Instrument [Line Items]
Spread on variable interest rate	2.35%

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Detail) $ / shares in Units, $ in Thousands

Oct. 15, 2021USD ($)shares

Sep. 15, 2021USD ($)$ / shares

Aug. 25, 2021shares

Jun. 15, 2021

Mar. 15, 2021

Jun. 15, 2020

Sep. 30, 2021USD ($)seriesshares

Sep. 30, 2020USD ($)

Sep. 30, 2021USD ($)seriesshares

Sep. 30, 2020USD ($)

Dec. 31, 2020shares

Capital Unit [Line Items]

Stock repurchase program, number of shares authorized to be repurchased

3,235,326

Percentage of company's outstanding shares

10.00%

Stock repurchase program, remaining period

1 year

Stock repurchased during period, shares

Preferred stock, number of series outstanding | series

Redemption of preferred stock | $

[1]

$ 79,677

Loss on redemption of preferred stock | $

$ 2,820

$ 0

$ 2,820

$ 0

Preferred stock, shares outstanding (shares)

5,700,000

9,000,000

Subsequent Event

Capital Unit [Line Items]

Stock repurchased during period, shares

167,233

Stock repurchased during period, value | $

$ 7,200

Series C and D Preferred Stock

Capital Unit [Line Items]

Redemption of preferred stock | $

$ 82,500

Loss on redemption of preferred stock | $

$ 2,800

Series C Preferred Stock

Capital Unit [Line Items]

Preferred stock, redemption price per share (in usd per share) | $ / shares

$ 25

Preferred stock, shares outstanding (shares)

Stated rate (as a percent)

7.00%

Series C Preferred Stock | London Interbank Offered Rate (LIBOR)

Capital Unit [Line Items]

Spread on variable interest rate

5.30%

Series D Preferred Stock

Capital Unit [Line Items]

Preferred stock, redemption price per share (in usd per share) | $ / shares

$ 25

Preferred stock, shares outstanding (shares)

Stated rate (as a percent)

6.50%

Series D Preferred Stock | London Interbank Offered Rate (LIBOR)

Capital Unit [Line Items]

Spread on variable interest rate

5.09%

Series E Preferred Stock

Capital Unit [Line Items]

Stated rate (as a percent)

6.45%

Series E Preferred Stock | London Interbank Offered Rate (LIBOR)

Capital Unit [Line Items]

Spread on variable interest rate

5.14%

[1]

Refer to NOTE 11 – SHAREHOLDERS' EQUITY for additional information about the redemption of Series C and Series D Preferred Stock.

Shareholders' Equity - Preferre

Shareholders' Equity - Preferred Stock and Dividends Paid Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	5,700,000		5,700,000		9,000,000
Preferred stock, value	$ 137,794		$ 137,794		$ 217,471
Series C Preferred Stock
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	0		0		2,300,000
Preferred stock, value	$ 0		$ 0		$ 55,569
Initial Fixed Rate			7.00%
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.346206	$ 0.357778	$ 1.041346	$ 1.232778
Series C Preferred Stock \| London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Floating rate of Three-Month LIBOR Plus:			5.30%
Series D Preferred Stock
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	0		0		1,000,000
Preferred stock, value	$ 0		$ 0		$ 24,108
Initial Fixed Rate			6.50%
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.332790	0.40625	$ 1.075982	1.21875
Series D Preferred Stock \| London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Floating rate of Three-Month LIBOR Plus:			5.09%
Series E Preferred Stock
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	2,300,000		2,300,000		2,300,000
Preferred stock, value	$ 55,593		$ 55,593		$ 55,593
Initial Fixed Rate			6.45%
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.335984	0.403125	$ 1.142234	1.209375
Series E Preferred Stock \| London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Floating rate of Three-Month LIBOR Plus:			5.14%
Series F Preferred Stock
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	3,400,000		3,400,000		3,400,000
Preferred stock, value	$ 82,201		$ 82,201		$ 82,201
Initial Fixed Rate			6.00%
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.375	$ 0.375	$ 1.125	$ 1.125
Series F Preferred Stock \| London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Floating rate of Three-Month LIBOR Plus:			4.762%

Regulatory Capital - Summary of

Regulatory Capital - Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios (Detail) - USD ($) $ in Thousands	Sep. 30, 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	$ 1,201,160	$ 954,839
Tier 1 capital (to risk weighted assets), Actual Amount	1,338,953	1,172,310
Total capital (to risk weighted assets), Actual Amount	1,572,222	1,401,119
Tier 1 capital (to average assets), Actual Amount	$ 1,338,953	$ 1,172,310
Common equity Tier 1 (to risk weighted assets), Actual Ratio	10.412%	8.079%
Tier 1 capital (to risk weighted assets), Actual Ratio	0.11607	0.09919
Total capital (to risk weighted assets), Actual Ratio	0.13629	0.11855
Tier 1 capital (to average assets), Actual Ratio	0.07876	0.08597
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 519,125	$ 531,844
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	692,166	709,125
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	922,888	945,500
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 679,974	$ 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	$ 807,527	$ 827,312
Tier 1 (to risk weighted assets) Required for Basel III amount	980,569	1,004,594
Total capital (to risk weighted assets), for Basel III amount	1,211,291	1,240,969
Tier 1 (to risk average assets), for Basel III amount	$ 679,974	$ 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	$ 1,471,897	$ 1,254,082
Tier 1 capital (to risk weighted assets), Actual Amount	1,471,897	1,254,082
Total capital (to risk weighted assets), Actual Amount	1,632,808	1,424,791
Tier 1 capital (to average assets), Actual Amount	$ 1,471,897	$ 1,254,082
Common equity Tier 1 (to risk weighted assets), Actual Ratio	12.765%	10.615%
Tier 1 capital (to risk weighted assets), Actual Ratio	0.12765	0.10615
Total capital (to risk weighted assets), Actual Ratio	0.14161	0.12060
Tier 1 capital (to average assets), Actual Ratio	0.08660	0.09208
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 518,878	$ 531,639
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	691,838	708,852
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	922,451	945,136
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 679,839	$ 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	$ 749,491	$ 767,923
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	922,451	945,136
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	1,153,063	1,181,421
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 849,799	$ 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	$ 807,144	$ 826,994
Tier 1 (to risk weighted assets) Required for Basel III amount	940,104	1,004,207
Total capital (to risk weighted assets), for Basel III amount	1,210,716	1,240,492
Tier 1 (to risk average assets), for Basel III amount	$ 679,838	$ 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)	Sep. 30, 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)	9 Months Ended
	Sep. 30, 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	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	$ 1,052,054	$ 693,354
Cash and cash equivalents, Estimated Fair Value	1,052,054	693,354
Debt securities, available for sale	1,861,697	1,206,431
Equity securities	5,000	3,854
Loans held for sale	29,957	79,086
Total loans and leases receivable, net of allowance for credit losses on loans and leases	15,354,084	15,608,989
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	15,323,107	16,222,202
FHLB, Federal Reserve Bank and other restricted stock, Carrying Amount	57,184	71,368
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	57,184	71,368
Derivative assets	34,234	54,223
Deposits, Carrying Amount	16,971,025	11,309,929
Deposits, Estimated Fair Value	16,971,434	11,312,494
FRB PPP Liquidity Facility, Carrying Amount	0	4,415,016
FRB PPP Liquidity Facility, Estimated Fair Value		4,415,016
Federal funds purchased, Carrying Amount	0	250,000
Federal funds purchased, Estimated Fair Value		250,000
FHLB advances, Carrying Amount	0	850,000
FHLB advances, Estimated Fair Value		852,442
Other borrowings, Carrying Amount	223,151	124,037
Other borrowings, Estimated Fair Value	229,582	129,120
Subordinated debt, Carrying Amount	181,603	181,394
Subordinated debt, Estimated Fair Value	200,080	193,119
Derivative liabilities	34,573	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	1,052,054	693,354
Debt securities, available for sale	0	0
Equity securities		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	16,377,876	10,657,998
FRB PPP Liquidity Facility, Estimated Fair Value		0
Federal funds purchased, Estimated Fair Value		250,000
FHLB advances, Estimated Fair Value		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	1,796,080	1,206,431
Equity securities		0
Loans held for sale	29,449	78,443
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	2,557,624	3,616,432
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	57,184	71,368
Derivative assets	34,071	54,023
Deposits, Estimated Fair Value	593,558	654,496
FRB PPP Liquidity Facility, Estimated Fair Value		4,415,016
Federal funds purchased, Estimated Fair Value		0
FHLB advances, Estimated Fair Value		852,442
Other borrowings, Estimated Fair Value	229,582	129,120
Subordinated debt, Estimated Fair Value	200,080	193,119
Derivative liabilities	34,573	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	65,617	0
Equity securities		0
Loans held for sale	508	643
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	12,765,483	12,605,770
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	0	0
Derivative assets	163	200
Deposits, Estimated Fair Value	0	0
FRB PPP Liquidity Facility, Estimated Fair Value		0
Federal funds purchased, Estimated Fair Value		0
FHLB advances, Estimated Fair Value		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	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Measurements, Recurring
Assets
Assets, fair value	$ 4,465,714	$ 4,886,449
Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	25,155	76,836
Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	225,457	377,145
U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Fair Value		20,034
Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	9,666	63,091
Agency-guaranteed commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	2,194
Agency-guaranteed residential collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	102,194	140,841
Agency-guaranteed commercial collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	141,808	20,926
Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	28,088
Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	315,502	32,367
Corporate notes \| Fair Value, Measurements, Recurring
Assets
Fair Value	440,892	396,744
Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	587,241	136,992
State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	8,655	18,291
Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, fair value		3,854
Derivative asset \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	34,234	54,223
Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	12,159	5,509
Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		55,683
Loans receivable, mortgage warehouse – fair value option \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	2,557,624	3,616,432
Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	34,573	98,164
Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	25,155	21,118
Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		35
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	3,854
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Fair Value		0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Agency-guaranteed commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Agency-guaranteed residential collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Agency-guaranteed commercial collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate notes \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, fair value		3,854
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Derivative asset \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		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	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		0
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	4,399,934	4,882,395
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	17,290	72,934
Significant Other Observable Inputs (Level 2) \| Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	159,840	377,145
Significant Other Observable Inputs (Level 2) \| U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Fair Value		20,034
Significant Other Observable Inputs (Level 2) \| Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	9,666	63,091
Significant Other Observable Inputs (Level 2) \| Agency-guaranteed commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	2,194
Significant Other Observable Inputs (Level 2) \| Agency-guaranteed residential collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	102,194	140,841
Significant Other Observable Inputs (Level 2) \| Agency-guaranteed commercial collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	141,808	20,926
Significant Other Observable Inputs (Level 2) \| Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	28,088
Significant Other Observable Inputs (Level 2) \| Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	315,502	32,367
Significant Other Observable Inputs (Level 2) \| Corporate notes \| Fair Value, Measurements, Recurring
Assets
Fair Value	440,892	396,744
Significant Other Observable Inputs (Level 2) \| Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	587,241	136,992
Significant Other Observable Inputs (Level 2) \| State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	8,655	18,291
Significant Other Observable Inputs (Level 2) \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, fair value		0
Significant Other Observable Inputs (Level 2) \| Derivative asset \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	34,071	54,023
Significant Other Observable Inputs (Level 2) \| Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	12,159	5,509
Significant Other Observable Inputs (Level 2) \| Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		55,683
Significant Other Observable Inputs (Level 2) \| Loans receivable, mortgage warehouse – fair value option \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	2,557,624	3,616,432
Significant Other Observable Inputs (Level 2) \| Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	34,573	98,164
Significant Other Observable Inputs (Level 2) \| Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	17,290	17,251
Significant Other Observable Inputs (Level 2) \| Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		0
Significant Unobservable Inputs (Level 3) \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	65,780	200
Significant Unobservable Inputs (Level 3) \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	7,865	3,902
Significant Unobservable Inputs (Level 3) \| Asset-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	65,617	0
Significant Unobservable Inputs (Level 3) \| U.S. government agencies securities \| Fair Value, Measurements, Recurring
Assets
Fair Value		0
Significant Unobservable Inputs (Level 3) \| Agency-guaranteed residential mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) \| Agency-guaranteed commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0
Significant Unobservable Inputs (Level 3) \| Agency-guaranteed residential collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) \| Agency-guaranteed commercial collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) \| Commercial mortgage-backed securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0
Significant Unobservable Inputs (Level 3) \| Collateralized loan obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) \| Corporate notes \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) \| Private label collateralized mortgage obligations \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) \| State and political subdivision debt securities \| Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) \| Equity securities \| Fair Value, Measurements, Recurring
Assets
Assets, fair value		0
Significant Unobservable Inputs (Level 3) \| Derivative asset \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	163	200
Significant Unobservable Inputs (Level 3) \| Loans held for sale \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Significant Unobservable Inputs (Level 3) \| Loans held for sale \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		0
Significant Unobservable Inputs (Level 3) \| Loans receivable, mortgage warehouse – fair value option \| Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Significant Unobservable Inputs (Level 3) \| Derivative liabilities \| Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	0	0
Significant Unobservable Inputs (Level 3) \| Collateral-dependent loans \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	$ 7,865	3,867
Significant Unobservable Inputs (Level 3) \| Other real estate owned \| Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value		$ 35

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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 301	$ 52	$ 200	$ 79
Issuances	163	455	660	722
Settlements	(301)	(52)	(697)	(346)
Balance at end of period	$ 163	$ 455	$ 163	$ 455

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) - Significant Unobservable Inputs (Level 3) $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned		$ 35
Residential mortgage loan commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments	$ 163	$ 200
Minimum \| Asset-backed securities \| Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.04
Minimum \| Asset-backed securities \| Annualized loss rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.02
Minimum \| Asset-backed securities \| Constant prepayment rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.12
Minimum \| Other real estate owned \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, measurement input		0.08
Minimum \| Residential mortgage loan commitments \| Pull-through rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans, measurement input	0.75	0.78
Maximum \| Asset-backed securities \| Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.06
Maximum \| Asset-backed securities \| Annualized loss rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.06
Maximum \| Asset-backed securities \| Constant prepayment rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.25
Maximum \| Other real estate owned \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, measurement input		0.09
Maximum \| Residential mortgage loan commitments \| Pull-through rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans, measurement input	0.94	0.78
Weighted Average \| Asset-backed securities \| Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.05
Weighted Average \| Asset-backed securities \| Annualized loss rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.04
Weighted Average \| Asset-backed securities \| Constant prepayment rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.17
Weighted Average \| Other real estate owned \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, measurement input		0.09
Weighted Average \| Residential mortgage loan commitments \| Pull-through rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans, measurement input	0.83	0.78
Real Estate \| Collateral-dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	$ 6,616	$ 2,928
Real Estate \| Minimum \| Collateral-dependent loans \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.05	0.08
Real Estate \| Maximum \| Collateral-dependent loans \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.09	0.08
Real Estate \| Weighted Average \| Collateral-dependent loans \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.07	0.08
Commercial and industrial \| Collateral-dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	$ 741	$ 939
Commercial and industrial \| Minimum \| Collateral-dependent loans \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.08	0.07
Commercial and industrial \| Minimum \| Collateral-dependent loans \| Business asset valuation adjustments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.20	0.60
Commercial and industrial \| Maximum \| Collateral-dependent loans \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.26	0.08
Commercial and industrial \| Maximum \| Collateral-dependent loans \| Business asset valuation adjustments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.20	0.60
Commercial and industrial \| Weighted Average \| Collateral-dependent loans \| Liquidation expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.12	0.08
Commercial and industrial \| Weighted Average \| Collateral-dependent loans \| Business asset valuation adjustments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans, measurement input	0.20	0.60

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)derivative	Dec. 31, 2020USD ($)derivative
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, net liability position, aggregate fair value	$ (33,200)
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	$ 8,700	$ 11,900
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral pledged	$ 31,693	$ 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	0	5
Aggregate notional amount		$ 1,100,000
Number of interest rate derivatives terminated \| derivative	4
Aggregate notional amount, terminated	$ 850,000
Reclassification of realized losses from AOCI, discontinuation of cash flow hedge	$ 25,900
Interest Rate Contract \| Derivative Designated as Hedging Instrument \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Number of outstanding interest rate derivatives \| derivative	16	24
Aggregate notional amount	$ 80,500	$ 272,300
Number of interest rate derivatives terminated \| derivative	8
Aggregate notional amount, terminated	$ 191,800
Interest Rate Swap \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 1,400,000	$ 1,400,000
Number of derivative instruments held \| derivative	155	155
Interest Rate Cap \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 265,600	$ 204,900
Number of derivative instruments held \| derivative	14,000	12,000
Credit Contract \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 162,200	$ 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	Sep. 30, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	$ 80,500	$ 272,159
Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items	$ 846	$ 741

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets \| Derivative Designated as Hedging Instrument \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets		$ 196
Other Assets \| Derivative Designated as Hedging Instrument \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	$ 846	0
Other Assets \| Derivative Designated as Hedging Instrument \| Interest Rate Swap \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets		196
Other Assets \| Derivative Designated as Hedging Instrument \| Interest Rate Swap \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	846	0
Other Assets \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	33,388	54,027
Other Assets \| Not Designated as Hedging Instrument \| Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	163	200
Other Assets \| Not Designated as Hedging Instrument \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	32,905	53,455
Other Assets \| Not Designated as Hedging Instrument \| Interest Rate Cap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	150	46
Other Assets \| Not Designated as Hedging Instrument \| Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	170	326
Other Liabilities \| Derivative Designated as Hedging Instrument \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities		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		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	34,573	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	34,216	56,209
Other Liabilities \| Not Designated as Hedging Instrument \| Interest Rate Cap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	150	46
Other Liabilities \| Not Designated as Hedging Instrument \| Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	$ 207	$ 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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives			$ 9,117	$ (24,602)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 0	$ (4,400)	(26,972)	(8,596)
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	0	429	9,117	(24,602)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	0	(4,400)	(2,505)	(8,596)
Derivative Designated as Hedging Instrument \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	0	0	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	0	0	4,777	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	0	0	(4,777)	0
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	386	952	2,584	(4,379)
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	517	387	2,540	(6,191)
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	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	7	162	81	1,436
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	$ (138)	$ 403	$ (37)	$ 376

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	Sep. 30, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	$ 0	$ 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	$ 0	$ 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	Sep. 30, 2021	Dec. 31, 2020
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	$ 31,693	$ 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	(31,693)	(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	Sep. 30, 2018	Mar. 31, 2020	Sep. 30, 2019	Dec. 31, 2016
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 Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]