Customers Bancorp (CUBI) 10-K 2 Mar 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 25, 2020	Jun. 30, 2019
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2019
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	1015 Penn Avenue
Entity Address, Address Line Two	Suite 103
Entity Address, City or Town	Wyomissing
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19610
City Area Code	610
Local Phone Number	933-2000
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 605,709,575
Entity Common Stock, Shares Outstanding		31,381,499
Entity Central Index Key	0001488813
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement to be delivered to shareholders in connection with the 2020 Annual Meeting of Shareholders are incorporated by reference into Part III of this Annual Report.
Voting Common Stock, par value $1.00 per share | New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Voting Common Stock, par value $1.00 per share
Trading Symbol	CUBI
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share | New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series C, par value $1.00 per share
Trading Symbol	CUBI/PC
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share | New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series D, par value $1.00 per share
Trading Symbol	CUBI/PD
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share | New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series E, par value $1.00 per share
Trading Symbol	CUBI/PE
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share | New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series F, par value $1.00 per share
Trading Symbol	CUBI/PF
Security Exchange Name	NYSE
5.375% Subordinated Notes due 2034 | New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	5.375% Subordinated Notes due 2034
Trading Symbol	CUBB
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 33,095	$ 17,696
Interest earning deposits	179,410	44,439
Cash and cash equivalents	212,505	62,135
Investment securities available for sale, at fair value	595,876	665,012
Loans held for sale (includes $2,130 and $1,507, respectively, at fair value)	486,328	1,507
Loans receivable, mortgage warehouse, at fair value	2,245,758	1,405,420
Loans and leases receivable	7,318,988	7,138,074
Allowance for loan and lease losses	(56,379)	(39,972)
Total loans and leases receivable, net of allowance for loan and lease losses	9,508,367	8,503,522
FHLB, Federal Reserve Bank, and other restricted stock	84,214	89,685
Accrued interest receivable	38,072	32,955
Bank premises and equipment, net	9,389	11,063
Bank-owned life insurance	272,546	264,559
Other real estate owned	173	816
Goodwill and other intangibles	15,195	16,499
Other assets	298,052	185,672
Total assets	11,520,717	9,833,425
Deposits:
Demand, non-interest bearing	1,343,391	1,122,171
Interest bearing	7,305,545	6,020,065
Total deposits	8,648,936	7,142,236
Federal funds purchased	538,000	187,000
FHLB advances	850,000	1,248,070
Other borrowings	123,630	123,871
Subordinated debt	181,115	108,977
Accrued interest payable and other liabilities	126,241	66,455
Total liabilities	10,467,922	8,876,609
Commitments and contingencies (NOTE 21)
Shareholders’ equity:
Preferred stock, par value $1.00 per share; liquidation preference $25.00 per share; 100,000,000 shares authorized, 9,000,000 shares issued and outstanding as of December 31, 2019 and 2018	217,471	217,471
Common stock, par value $1.00 per share; 200,000,000 shares authorized; 32,617,410 and 32,252,488 shares issued as of December 31, 2019 and 2018; 31,336,791 and 31,003,028 shares outstanding as of December 31, 2019 and 2018	32,617	32,252
Additional paid in capital	444,218	434,314
Retained earnings	381,519	316,651
Accumulated other comprehensive loss, net	(1,250)	(22,663)
Treasury stock, at cost (1,280,619 and 1,249,460 shares as of December 31, 2019 and 2018)	(21,780)	(21,209)
Total shareholders’ equity	1,052,795	956,816
Total liabilities and shareholders’ equity	11,520,717	9,833,425
Loans held for sale at fair value	$ 2,130	$ 1,507

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Loans held for sale at fair value	$ 2,130	$ 1,507
Preferred stock, par value (usd per share)	$ 1	$ 1
Preferred stock, liquidation preference (usd per share)	$ 25	$ 25
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	9,000,000	9,000,000
Preferred stock, shares outstanding	9,000,000	9,000,000
Common stock, par value (usd per share)	$ 1	$ 1
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	32,617,410	32,252,488
Common stock, shares outstanding	31,336,791	31,003,028
Treasury stock, shares	1,280,619	1,249,460

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest income:
Loans and leases	$ 431,491	$ 373,234	$ 339,936
Investment securities	23,713	33,209	25,153
Other	8,535	11,508	7,761
Total interest income	463,739	417,951	372,850
Interest expense:
Deposits	141,464	110,808	67,582
FHLB advances	26,519	31,043	21,130
Subordinated debt	6,983	6,737	6,739
Federal funds purchased and other borrowings	11,463	11,486	10,056
Total interest expense	186,429	160,074	105,507
Net interest income	277,310	257,877	267,343
Provision for loan and lease losses	24,227	5,642	6,768
Net interest income after provision for loan and lease losses	253,083	252,235	260,575
Non-interest income:
Revenue from contracts with customers	46,720	43,239	55,961
Commercial lease income	12,051	5,354	647
Bank-owned life insurance	7,272	7,620	7,219
Mortgage warehouse transactional fees	7,128	7,158	9,345
Gain (loss) on sale of SBA and other loans	2,770	3,294	4,223
Mortgage banking income	66	606	875
Loss upon acquisition of interest-only GNMA securities	(7,476)	0	0
Impairment loss on investment securities	0	0	(12,934)
Gain (loss) on sale of investment securities	1,001	(18,659)	8,800
Unrealized gain (loss) on investment securities	1,299	(1,634)	0
Other	15,071	16,740	9,187
Total non-interest income	80,938	58,998	78,910
Non-interest expense:
Salaries and employee benefits	107,632	104,841	95,518
Technology, communication and bank operations	43,481	44,454	45,885
Professional services	25,109	20,237	28,051
Occupancy	13,098	11,809	11,161
Commercial lease depreciation	9,473	4,388	522
FDIC assessments, non-income taxes, and regulatory fees	5,861	8,642	7,906
Provision for operating losses	9,638	5,616	6,435
Advertising and promotion	4,044	2,446	1,470
Merger and acquisition related expenses	100	4,391	410
Loan workout	1,687	2,183	2,366
Other real estate owned	398	449	570
Other	11,380	10,723	15,312
Total non-interest expense	231,901	220,179	215,606
Income before income tax expense	102,120	91,054	123,879
Income tax expense	22,793	19,359	45,042
Net income	79,327	71,695	78,837
Preferred stock dividends	14,459	14,459	14,459
Net income available to common shareholders	$ 64,868	$ 57,236	$ 64,378
Basic earnings per common share (usd per share)	$ 2.08	$ 1.81	$ 2.10
Diluted earnings per common share (usd per share)	$ 2.05	$ 1.78	$ 1.97
Interchange and card revenue
Non-interest income:
Revenue from contracts with customers	$ 28,941	$ 30,695	$ 41,509
Deposit fees
Non-interest income:
Revenue from contracts with customers	$ 12,815	$ 7,824	$ 10,039

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 79,327	$ 71,695	$ 78,837
Unrealized gains (losses) on available for sale debt securities:
Unrealized gains (losses) arising during the period	49,688	(46,069)	12,266
Income tax effect	(12,919)	11,978	(4,378)
Reclassification adjustments for (gains) losses included in net income	(1,001)	18,659	(8,800)
Income tax effect	260	(4,851)	3,432
Net unrealized gains (losses) on available for sale debt securities	36,028	(20,283)	2,520
Unrealized gains (losses) on cash flow hedges:
Unrealized gains (losses) arising during the period	(21,157)	1,995	666
Income tax effect	5,501	(518)	(260)
Reclassification adjustment for (gains) losses included in net income	1,407	(2,917)	2,634
Income tax effect	(366)	758	(1,027)
Net unrealized gains (losses) on cash flow hedges	(14,615)	(682)	2,013
Other comprehensive income (loss), net of income tax effect	21,413	$ (20,965)	$ 4,533
Comprehensive income (loss)	$ 100,740

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands		Total	Preferred Stock	Voting Common Stock, par value $1.00 per share	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2016		$ 855,872	$ 217,471	$ 30,820	$ 427,008	$ 193,698	$ (4,892)	$ (8,233)
Beginning balance, preferred stock (shares) at Dec. 31, 2016			9,000,000
Beginning balance, common stock (shares) at Dec. 31, 2016				30,289,917
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		78,837				78,837
Other comprehensive income (loss)		4,533					4,533
Preferred stock dividends	[1]	(14,459)				(14,459)
Share-based compensation expense		6,088			6,088
Exercise of warrants (shares)				74,161
Exercise of warrants		1,059		$ 74	985
Issuance of common stock under share-based-compensation arrangements (shares)				1,018,425
Issuance of common stock under share-based-compensation arrangements		$ (10,966)		$ 1,019	(11,985)
Repurchase of common shares (shares)		0
Ending balance at Dec. 31, 2017		$ 920,964	$ 217,471	$ 31,913	422,096	258,076	(359)	(8,233)
Ending balance, preferred stock (shares) at Dec. 31, 2017			9,000,000
Ending balance, common stock (shares) at Dec. 31, 2017				31,382,503
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		71,695				71,695
Other comprehensive income (loss)		(20,965)					(20,965)
Preferred stock dividends	[1]	(14,459)				(14,459)
Share-based compensation expense		8,605			8,605
Exercise of warrants (shares)				5,242
Exercise of warrants		112		$ 5	107
Issuance of common stock under share-based-compensation arrangements (shares)				334,483
Issuance of common stock under share-based-compensation arrangements		$ 3,840		$ 334	3,506
Repurchase of common shares (shares)		(719,200)		(719,200)
Repurchase of common shares, value		$ (12,976)						(12,976)
Ending balance at Dec. 31, 2018		$ 956,816	$ 217,471	$ 32,252	434,314	316,651	(22,663)	(21,209)
Ending balance, preferred stock (shares) at Dec. 31, 2018		9,000,000	9,000,000
Ending balance, common stock (shares) at Dec. 31, 2018		31,003,028		31,003,028
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 79,327				79,327
Other comprehensive income (loss)		21,413					21,413
Preferred stock dividends	[1]	(14,459)				(14,459)
Share-based compensation expense		8,898			8,898
Issuance of common stock under share-based-compensation arrangements (shares)				364,922
Issuance of common stock under share-based-compensation arrangements		1,371		$ 365	1,006
Repurchase of common shares (shares)				(31,159)
Repurchase of common shares, value		(571)						(571)
Ending balance at Dec. 31, 2019		$ 1,052,795	$ 217,471	$ 32,617	$ 444,218	$ 381,519	$ (1,250)	$ (21,780)
Ending balance, preferred stock (shares) at Dec. 31, 2019		9,000,000	9,000,000
Ending balance, common stock (shares) at Dec. 31, 2019		31,336,791		31,336,791
[1]	Dividends per share of $1.75, $1.63, $1.61, and $1.50 per share were declared on Series C, D, E, and F preferred stock for the years ended December 31, 2019, 2018, and 2017, respectively.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Series C Preferred Stock
Preferred stock, dividends paid (usd per share)	$ 1.75	$ 1.75	$ 1.75
Series D Preferred Stock
Preferred stock, dividends paid (usd per share)	1.63	1.63	1.63
Series E Preferred Stock
Preferred stock, dividends paid (usd per share)	1.61	1.61	1.61
Series F Preferred Stock
Preferred stock, dividends paid (usd per share)	$ 1.50	$ 1.50	$ 1.50

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities
Net income	$ 79,327	$ 71,695	$ 78,837
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan and lease losses	24,227	5,642	6,768
Depreciation and amortization	22,879	14,157	10,801
Share-based compensation expense	9,851	9,740	7,167
Deferred taxes	14,516	9,303	14,820
Net amortization of investment securities premiums and discounts	1,016	1,403	702
Unrealized (gain) loss on investment securities	1,299	(1,634)	0
(Gain) loss on sale of investment securities	(1,001)	18,659	(8,800)
Loss upon acquisition of interest-only GNMA securities	7,476	0	0
Impairment loss on investment securities	0	0	12,934
(Gain) loss on sale of loans	(2,804)	(3,913)	(4,898)
Origination of loans held for sale	(48,044)	(31,699)	(41,172)
Proceeds from the sale of loans held for sale	47,455	32,676	40,656
Amortization of fair value discounts and premiums	893	194	88
Net (gain) loss on sales of other real estate owned	137	183	154
Valuation and other adjustments to other real estate owned	62	153	298
Earnings on investment in bank-owned life insurance	(7,272)	(7,620)	(7,219)
(Increase) decrease in accrued interest receivable and other assets	(84,141)	(34,614)	(32,256)
Increase (decrease) in accrued interest payable and other liabilities	15,002	9,881	(16,687)
Net Cash Provided by (Used in) Operating Activities	78,280	97,474	62,193
Cash Flows from Investing Activities
Proceeds from maturities, calls and principal repayments on investment securities	38,709	44,313	48,124
Proceeds from sales of investment securities available for sale	97,555	476,182	769,203
Purchases of investment securities available for sale	0	(763,242)	(796,594)
Origination of mortgage warehouse loans	(31,782,542)	(27,209,330)	(30,084,255)
Proceeds from repayments of mortgage warehouse loans	30,900,905	27,597,318	30,407,662
Net (increase) decrease in loans and leases, excluding mortgage warehouse loans	239,018	59,534	(960,372)
Proceeds from sale of loans	273,388	110,526	462,518
Purchase of loans	(1,167,417)	(397,888)	(262,641)
Proceeds from bank-owned life insurance	0	529	1,418
Purchases of bank-owned life insurance	0	0	(90,000)
Net proceeds from (purchases of) FHLB, Federal Reserve Bank, and other restricted stock	5,471	16,233
Net proceeds from (purchases of) FHLB, Federal Reserve Bank, and other restricted stock			(37,510)
Purchases of bank premises and equipment	(1,705)	(1,777)	(2,135)
Proceeds from sales of other real estate owned	735	2,213	1,680
Purchases of university relationship intangible asset	0	(1,502)	0
Purchases of leased assets under lessor operating leases	(48,552)	(37,207)	(22,223)
Net Cash Used in Investing Activities	(1,444,435)	(104,098)	(565,125)
Cash Flows from Financing Activities
Net increase (decrease) in deposits	1,506,700	342,094	(503,633)
Net increase (decrease) in short-term borrowed funds from the FHLB	(748,070)	(363,790)	743,060
Net increase (decrease) in federal funds purchased	351,000	32,000	72,000
Proceeds from long-term borrowed funds from the FHLB	350,000	0	0
Proceeds from issuance of subordinated long-term debt	72,030	0	0
Proceeds from issuance of other long-term borrowings	24,477	0	98,564
Repayments of other borrowings	(25,000)	(63,250)	0
Preferred stock dividends paid	(14,459)	(14,459)	(14,459)
Exercise and redemption of warrants	0	112	1,059
Purchase of treasury stock	(571)	(12,976)	0
Payments of employee taxes withheld from share-based awards	(1,732)	(880)	(14,761)
Proceeds from issuance of common stock	2,150	3,585	2,716
Net Cash Provided by (Used in) Financing Activities	1,516,525	(77,564)	384,546
Net Increase (Decrease) in Cash and Cash Equivalents	150,370	(84,188)	(118,386)
Cash and Cash Equivalents – Beginning	62,135	146,323	264,709
Cash and Cash Equivalents – Ending	212,505	62,135	146,323
Supplementary Cash Flow Information:
Interest paid	182,596	160,384	101,575
Income taxes paid	7,410	4,794	40,282
Noncash Operating and Investing Activities:
Transfer of loans to other real estate owned	291	1,639	750
Transfer of loans held for investment to held for sale	499,774	0	150,638
Transfer of loans held for sale to held for investment	0	129,691	0
Acquisition of interest-only GNMA securities securing a mortgage warehouse loan	17,157	0	0
Acquisition of residential reverse mortgage loans securing a mortgage warehouse loan	$ 1,325	$ 0	$ 0

Description of the Business

Description of the Business	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	DESCRIPTION OF THE BUSINESS Customers Bancorp, Inc. ("Customers Bancorp") is a bank holding company engaged in banking activities through its wholly owned subsidiary, Customers Bank ("the Bank"), collectively referred to as “Customers” herein. Customers Bancorp and its wholly owned subsidiaries, the Bank, and non-bank subsidiaries, serve residents and businesses in Southeastern Pennsylvania (Bucks, Berks, Chester, Philadelphia and Delaware Counties); Rye Brook, New York (Westchester County); Hamilton, New Jersey (Mercer County); Boston, Massachusetts; Providence, Rhode Island; Portsmouth, New Hampshire (Rockingham County); Manhattan and Melville, New York; Washington, D.C.; Chicago, Illinois; and nationally for certain loan and deposit products. The Bank has 13 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, Pennsylvania; Washington, D.C.; and Chicago, Illinois. The Bank also provides liquidity to residential mortgage originators nationwide through commercial loans to mortgage companies. Through BankMobile, a division of Customers Bank, Customers offers state of the art high tech digital banking services to consumers, students, and the "under banked" nationwide, along with "Banking as a Service" offerings with white label partners. The Bank is subject to regulation of the Pennsylvania Department of Banking and Securities and the Federal Reserve Bank and is periodically examined by those regulatory authorities. Customers Bancorp has made certain equity investments through its wholly owned subsidiaries CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd.

Significant Accounting Policies

Significant Accounting Policies and Basis of Presentation	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Significant Accounting Policies and Basis of Presentation	SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION Basis of Presentation The consolidated financial statements have been prepared in conformity with U.S. GAAP and pursuant to the rules and regulations of the SEC. The accounting and reporting policies of Customers Bancorp and subsidiaries are in conformity with U.S. GAAP and predominant practices of the banking industry. The preparation of financial statements requires management to make estimates and assumptions that affect the reported balances of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The ALLL and the valuation of the interest-only GNMA securities are material estimates that are particularly susceptible to significant change in the near-term. Principles of Consolidation The accompanying consolidated financial statements include the accounts of Customers Bancorp and its wholly owned subsidiaries, including Customers Bank, CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd., as well as Customers Bank's wholly owned subsidiaries, BankMobile Technologies, Inc., Customers Commercial Finance, LLC and Devon Service PA LLC. All intercompany balances and transactions have been eliminated in consolidation. Cash and Cash Equivalents and Statements of Cash Flows Cash and cash equivalents include cash on hand, amounts due from banks and interest-bearing deposits with banks with a maturity date of three months or less and are recorded at cost. The carrying value of cash and cash equivalents is a reasonable estimate of its approximate fair value. Changes in the balances of cash and cash equivalents are reported on the consolidated statements of cash flows. Cash receipts from the repayment or sale of loans are classified within the statement of cash flows based on management's original intent upon origination of the loan, as prescribed by accounting guidance related to the statement of cash flows. Commercial mortgage warehouse loans are classified as held for investment and presented at "Loans receivable, mortgage warehouse, at fair value" on the consolidated balance sheets and the cash flow activities associated with these commercial mortgage warehouse lending activities are reported as investing activities on the consolidated statements of cash flows. Restrictions on Cash and Amounts due from Banks The Bank is required to maintain average balances at a certain level of cash and amounts on deposit with the Federal Reserve Bank. Customers Bank generally maintains balances in excess of the required levels at the Federal Reserve Bank. At December 31, 2019 and 2018, these required reserve balances were $69.1 million and $58.4 million, respectively. Business Combinations Business combinations are accounted for by applying the acquisition method in accordance with ASC 805, Business Combinations . Under the acquisition method, identifiable assets acquired and liabilities assumed are measured at their fair values as of the date of acquisition and are recognized separately from goodwill. The results of operations of the acquired entity are included in the consolidated statement of income from the date of acquisition. Customers recognizes goodwill when the acquisition price exceeds the estimated fair value of the net assets acquired. Investment Securities Customers acquires securities, largely agency-guaranteed mortgage-backed securities and corporate notes, to effectively utilize cash and capital and to generate earnings. Security transactions are recorded as of the trade date. Debt securities are classified at the time of acquisition as available for sale, HTM or trading, and their classification determines the accounting as follows: Available for sale : Investment securities classified as available for sale are those debt securities that Customers intends to hold for an indefinite period of time but not necessarily to maturity. Investment securities available for sale are carried at fair value. Unrealized gains or losses are reported as increases or decreases in AOCI, net of the related deferred tax effect. Realized gains or losses, determined on the basis of the cost of the specific securities sold, are included in earnings and recorded on the trade date. Premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Interest-only GNMA securities : On June 28, 2019, Customers obtained ownership of certain interest-only GNMA securities that served as the primary collateral for loans made to one commercial mortgage warehouse customer through a Uniform Commercial Code private sale transaction, as further described in NOTE 5 – INVESTMENT SECURITIES. Upon acquisition, Customers elected the fair value option for these interest-only GNMA securities, with changes in fair value reported as unrealized gain (loss) on investment securities within non-interest income. The fair value of these securities at December 31, 2019 was $16.3 million. Held to maturity : Investment securities classified as HTM are those debt securities that Customers has both the intent and ability to hold to maturity regardless of changes in market conditions, liquidity needs, or changes in general economic conditions. These securities are carried at cost, adjusted for the amortization of premiums and accretion of discounts, computed by a method which approximates the interest method over the terms of the securities. There were no securities classified as HTM as of December 31, 2019 and 2018. Equity securities: Equity securities are carried at their fair value, with changes in fair value reported in other non-interest income beginning in 2018. Equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments. For years ended December 31, 2017 and prior, equity securities were classified as available for sale and carried at fair value, with unrealized gains or losses reported as increases or decreases in AOCI, net of the related deferred tax effect. For available for sale and HTM debt securities, management periodically assesses whether the securities are OTTI. OTTI means that management believes a security’s decline in fair value below its amortized cost basis is due to factors that could include the issuer’s inability to pay interest or dividends, its potential for default and/or other factors. When a HTM or available for sale debt security is assessed for OTTI, management has to first consider (a) whether Customers intends to sell the security, and (b) whether it is more likely than not that Customers will be required to sell the security prior to recovery of its amortized cost basis. If one of these circumstances applies to a security, an OTTI loss is recognized in the consolidated statements of income equal to the full amount of the decline in fair value below the amortized cost basis. If neither of these circumstances applies to a security, but Customers does not expect to recover the entire amortized cost basis, an OTTI has occurred that must be separated into two categories for debt securities: (a) the amount related to a credit loss and (b) the amount related to other factors. In determining the amount of OTTI attributable to credit loss, management compares the present value of cash flows expected to be collected to the amortized cost basis of the security. The portion of the total OTTI attributed to a credit loss is recognized in earnings (as the difference between the fair value and the present value of the estimated cash flows expected to be collected), while the amount related to all other factors is recognized in AOCI. The total OTTI loss is presented in the statement of income, less the portion recognized in AOCI. When a debt security becomes other-than-temporarily impaired, its amortized cost basis is reduced to reflect the portion of the total impairment related to credit loss. On January 1, 2018, Customers adopted the new accounting standard for financial instruments, which requires equity securities to be measured at fair value, except those accounted for under the equity method of accounting, with changes in fair value recognized in earnings in the period in which they occur and will no longer be deferred in AOCI. The adoption of this guidance resulted in a $1.0 million increase to beginning retained earnings and a $1.0 million decrease to beginning AOCI. Loan Accounting Framewor k The accounting for a loan depends on management’s strategy for the loan and on whether the loan was credit impaired at the date of acquisition. The Bank accounts for loans based on the following categories: • Loans held for sale, • Loans at fair value, • Loans receivable and • Purchased loans. The discussion that follows describes the accounting for loans in these categories. Loans Held for Sale and Loans at Fair Value Loans originated or purchased by Customers with the intent to sell them in the secondary market are carried either at the lower of cost or fair value, determined in the aggregate, or at fair value, depending upon an election made at the time the loan is originated or purchased. These loans are generally sold on a non-recourse basis with servicing released. Gains and losses on the sale of loans accounted for at the lower of cost or fair value are recognized in earnings based on the difference between the proceeds received and the carrying amount of the loans, inclusive of deferred origination fees and costs, if any. As a result of changes in events and circumstances or developments regarding management’s view of the foreseeable future, loans not originated or purchased with the intent to sell may subsequently be designated as held for sale. These loans are transferred to the held-for-sale portfolio at the lower of amortized cost or fair value. When the amortized cost of the loan exceeds its fair value at the date of transfer to the held-for-sale portfolio, the excess will be recognized as a charge against the ALLL to the extent the loan's reduction in fair value has already been provided for in the ALLL. Any subsequent lower of cost or fair value adjustments are recognized as a valuation allowance with charges recognized in non-interest income. Loans originated or purchased by Customers with the intent to sell them for which fair value accounting is elected are reported at fair value, with changes in fair value recognized in earnings in the period in which they occur. Upon sale, any difference between the proceeds received and the carrying amount of the loan is recognized in earnings. No fees or costs related to such loans are deferred, so they do not affect the gain or loss calculation at the time of sale. An ALLL is not maintained on loans designated as held for sale or reported at fair value. Loans Receivable - Mortgage Warehouse, at Fair Value Certain mortgage warehouse lending transactions subject to master repurchase agreements are reported at fair value based on an election made to account for the loans at fair value. Pursuant to these agreements, Customers funds the pipelines for these mortgage lenders by sending payments directly to the closing agents for funded loans and receives proceeds directly from third party investors when the loans are sold into the secondary market. Commercial mortgage warehouse loans are classified as held for investment and presented as "Loans receivable, mortgage warehouse, at fair value" on the consolidated balance sheets. An ALLL is not maintained on loans reported at fair value. Loans and Leases Receivable Loans and leases receivable that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding unpaid principal balances, net of an ALLL and any deferred fees. Interest income is accrued on the unpaid principal balance. Loan and lease origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment to the yield (interest income) of the related loans and leases using the level-yield method without anticipating prepayments. Customers is amortizing these amounts over the contractual life of the loans and leases. The accrual of interest is generally discontinued when the contractual payment of principal or interest has become 90 days past due or when management has doubts about further collectibility of principal or interest, even though the loan is currently performing. A loan or lease may remain on accrual status if it is in the process of collection and is well secured. When a loan or lease is placed on non-accrual status, unpaid accrued interest previously credited to income is reversed. Interest received on non-accrual loans and leases is generally applied against principal until all principal has been recovered. Thereafter, payments are recognized as interest income until all unpaid amounts have been received. Generally, loans and leases are restored to accrual status when the loan is brought current and has performed in accordance with the contractual terms for a minimum of six months, and the ultimate collectibility of the total contractual principal and interest is no longer in doubt. Purchased Loans Customers believes that the varying circumstances under which it purchaes loans and the diverse credit quality of loans purchased should drive the decision as to whether loans in a portfolio should be deemed to be PCI loans. Therefore, loan purchases are evaluated on a case-by-case basis to determine the appropriate accounting treatment. Loans purchased that do not have evidence of credit deterioration at the purchase date are accounted for in accordance with ASC 310-10, and loans purchased with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected are accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. Loans that are purchased that do not have evidence of credit deterioration Purchased performing loans are initially recorded at fair value and include credit and interest rate marks associated with acquisition accounting adjustments. Purchase premiums or discounts are subsequently amortized or accreted as an adjustment to yield over the estimated contractual lives of the loans. There is no ALLL established at the purchase date for purchased performing loans. An ALLL is recorded for any credit deterioration in these loans subsequent to the purchase. Loans that are purchased that have evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected For these types of loan purchases, evidence of deteriorated credit quality may include past-due and non-accrual status, borrower credit scores and recent loan-to-value percentages. The fair value of loans with evidence of credit deterioration is recorded net of a nonaccretable difference and accretable yield. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is the nonaccretable difference that is not included in the carrying amount of acquired loans. Subsequent to acquisition, estimates of cash flows expected to be collected are updated each reporting period based on updated assumptions regarding default rates, loss severities and other factors that are reflective of current market conditions. Subsequent decreases in expected cash flows will generally result in a provision for loan losses. Subsequent increases in expected cash flows will result in a reversal of the provision for loan losses to the extent of prior charges or a reclassification of the difference from nonaccretable to accretable with a positive impact on accretion of interest income in future periods. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized in interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of those cash flows. PCI loans acquired in the same fiscal quarter may be aggregated into one or more pools, provided that the loans have similar risk characteristics. A pool is then accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. On a quarterly basis, Customers re-estimates the total cash flows (both principal and interest) expected to be collected over the remaining life of each pool. These estimates incorporate assumptions regarding default rates, loss severities, the amounts and timing of prepayments and other factors that reflect the then-current market conditions. If the timing and/or amounts of expected cash flows on PCI loans are determined not to be reasonably estimable, no interest is accreted, and the loans are reported as non-accrual loans; however, when the timing and amounts of expected cash flows for PCI loans are reasonably estimable, interest is accreted, and the loans are reported as performing loans. Allowance for Loan and Lease Losses The ALLL is Management's estimate of the probable losses inherent in the loan portfolio as of the balance sheet date and are recognized through provisions for loan and lease losses. Loans and leases deemed to be uncollectible are charged against the ALLL, and subsequent recoveries, if any, are credited to the ALLL. The ALLL is maintained at a level considered appropriate to absorb probable incurred loan and lease losses inherent in the loan and lease portfolio as of the reporting date. Customers segments its loan and lease portfolio into groups of loans with similar risk characteristics for purposes of estimating the ALLL. Customers' loan and lease groups include multi-family, commercial and industrial, owner and non-owner occupied commercial real estate, construction, residential real estate, manufactured housing, other consumer and PCI loans. SBA loans are further segmented. Customers also further segments its residential real estate portfolio into two classes based upon certain risk characteristics: first-mortgage loans and home equity loans and lines of credit. The remaining loan groups are also considered classes for purposes of monitoring and assessing credit quality based on certain risk characteristics. Additionally, within each loan group the acquired loans that are accounted for under ASC 310-10 are further segmented. The total ALLL consists of an allowance for impaired loans, a general allowance for losses and may also include residual non-specific reserve amounts. Management performs a quarterly assessment of the adequacy of the ALLL, which is based on Customers' past loan and lease loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan and lease portfolio, current economic conditions, peer and industry data and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. Customers' current methodology for determining the ALLL is based on historical loss rates, peer and industry data, current economic conditions, risk ratings, allowances on loans and leases identified as impaired and other qualitative adjustments as considered appropriate. The impaired-loan and lease component of the ALLL generally relates to loans and leases for which it is probable that Customers will be unable to collect all amounts due according to the contractual terms of the loan and lease agreements. Customers analyzes certain loans and leases in its portfolio for impairment in accordance with ASC 310-10-35. Customers' impaired loans and leases generally include loans and leases that have been (i) placed on non-accrual, (ii) restructured in a TDR, regardless of their payment status and (iii) charged-off to their net realizable value. For such loans and leases, an allowance is established when the (i) discounted cash flows, (ii) collateral value or (iii) the impaired loan or lease estimated fair value is lower than the carrying value of the loan or lease. The general component of the ALLL covers groups of loans and leases by loan and lease class, including commercial loans and leases not considered impaired, as well as smaller balance homogeneous loans, such as other consumer loans, residential real estate, home equity loans, and home equity lines of credit. These pools of loans and leases are evaluated for loss exposure based upon industry, peer or Customers' historical loss rates for each of these groups of loans and leases. After determining the appropriate historical loss rate for each group of loans and leases, management considers current qualitative or environmental factors that are likely to cause estimated credit losses as of the evaluation date to differ from the historical loss experience. The overall effect of these factors is recorded as an adjustment that, as appropriate, increases or decreases the historical loss rate applied to the loan group. The qualitative factors that management generally considers include the following: • National, regional and local economic and business conditions, including review of changes in the unemployment rate; • Volume and severity of past-due loans, non-accrual loans and classified loans; • Lending policies and procedures, including underwriting standards and historically based loss/collection, charge-off and recovery practices; • Nature and volume of the portfolio; • Existence and effect of any credit concentrations and changes in the level of such concentrations; • Risk ratings; • Changes in the values of collateral for collateral dependent loans; • Changes in the quality of the loan review system; • Experience, ability and depth of lending management and staff; and • Other external factors, such as changes in the legal, regulatory or competitive environment. A residual reserve may be maintained to cover uncertainties that could affect management’s estimate of probable losses. The residual reserve amount reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating credit losses in the loan and lease portfolio. The discussion that follows describes Customers' underwriting policies for its primary lending activities and its credit monitoring and charge-off practices. Commercial and industrial loans and leases are underwritten after evaluating historical and projected profitability and cash flow to determine the borrower’s ability to repay its obligation as agreed. Commercial and industrial loans and leases are made primarily based on the identified cash flow of the borrower and secondarily on the underlying collateral supporting the loan or lease facility. Accordingly, the repayment of a commercial and industrial loan or lease depends primarily on the creditworthiness of the borrower (and any guarantors), while liquidation of collateral is a secondary and often insufficient source of repayment. Construction loans are underwritten based upon a financial analysis of the developers and property owners and construction cost estimates, in addition to independent appraisal valuations. These loans rely on the value associated with the project upon completion. The cost and valuation amounts used are estimates and may be inaccurate. Construction loans generally involve the disbursement of substantial funds over a short period of time with repayment substantially dependent upon the success of the completed project. Sources of repayment of these loans would be permanent financing upon completion or sales of the developed property. These loans are closely monitored by on-site inspections and are considered to be of a higher risk than other real estate loans due to their ultimate repayment being sensitive to general economic conditions, availability of long-term financing, interest-rate sensitivity and governmental regulation of real property. Commercial real estate and multi-family loans are subject to the underwriting standards and processes similar to commercial and industrial loans, in addition to those underwriting standards for real estate loans. These loans are viewed primarily as cash flow dependent and secondarily as loans secured by real estate. Repayment of these loans is generally dependent upon the successful operation of the property securing the loan, or the principal business conducted on the property securing the loan, to generate sufficient cash flows to service the debt. In addition, the underwriting considers the amount of the principal advanced relative to the property value. Commercial real estate and multi-family loans may be adversely affected by conditions in the real estate markets or the economy in general. Management monitors and evaluates commercial real estate and multi-family loans based on cash flow estimates, collateral valuation and risk-rating criteria. Customers also utilizes third-party experts to provide environmental and market valuations. Substantial effort is required to underwrite, monitor and evaluate commercial real estate and multi-family loans. Residential real estate loans are secured by one-to-four dwelling units. This group is further divided into first mortgage and home equity loans. First mortgages are originated at a loan to value ratio of 80% or less. Home equity loans have additional risks as a result of typically being in a second position or lower in the event collateral is liquidated. Manufactured housing loans are loans that are secured by the manufactured housing unit where the borrower may or may not own the underlying real estate and therefore have a higher risk than a residential real estate loan. Other consumer loans consist primarily of unsecured loans to individuals which are originated through Customers' retail network or acquired through purchases from third parties, primarily market place lenders. None of the loans are sub-prime at the time of origination. Customers considers sub-prime borrowers to be those with FICO scores below 660. Consumer loans have a greater credit risk than residential loans because of the difference in the underlying collateral, if any. The application of various federal and state bankruptcy and insolvency laws may limit the amount that can be recovered on such loans. Delinquency status and other borrower characteristics are used to monitor loans and leases and identify credit risks, and the general reserves are established based on the expected incurred net charge-offs, adjusted for qualitative factors. Charge-offs on commercial and industrial, construction, multi-family and commercial real estate loans and leases are recorded when management estimates that there are insufficient cash flows to repay the contractual loan obligation based upon financial information available and valuation of the underlying collateral. Shortfalls in the underlying collateral value for loans or leases determined to be collateral dependent are charged-off immediately. Customers also takes into account the strength of any guarantees and the ability of the borrower to provide value related to those guarantees in determining the ultimate charge-off or allowance associated with an impaired loan or lease. Accordingly, Customers may charge-off a loan or lease to a value below the net appraised value if it believes that an expeditious liquidation is desirable under the circumstance, and it has legitimate offers or other indications of interest to support a value that is less than the net appraised value. Alternatively, Customers may carry a loan or lease at a value that is in excess of the appraised value in certain circumstances, such as when Customers has a guarantee from a borrower that Customers believes has realizable value. In evaluating the strength of any guarantee, Customers evaluates the financial wherewithal of the guarantor, the guarantor’s reputation and the guarantor’s willingness and desire to work with Customers. Customers then conducts a review of the strength of the guarantee on a frequency established as the circumstances and conditions of the borrower warrant. Customers records charge-offs for residential real estate, other consumer and manufactured housing loans after 120 days of delinquency or sooner when cash flows are determined to be insufficient for repayment. Customers may also charge-off these loans below the net appraised valuation if Customers holds a junior-mortgage position in a piece of collateral whereby the risk to acquiring control of the property through the purchase of the senior-mortgage position is deemed to potentially increase the risk of loss upon liquidation due to the amount of time to ultimately sell the property and the volatile market conditions. In such cases, Customers may abandon its junior mortgage and charge-off the loan balance in full. Credit Quality Factors Commercial and industrial, multi-family, commercial real estate and construction loans and leases are each assigned a numerical rating of risk based on an internal risk-rating system. The risk rating is assigned at loan origination and indicates management's estimate of credit quality. Risk ratings are reviewed on a periodic or “as needed” basis. Residential real estate, manufactured housing and other consumer loans are evaluated primarily based on payment activity of the loan. Risk ratings are not established for residential real estate, home equity loans, manufactured housing loans, and other consumer 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 on aggregate payment history (through the monitoring of delinquency levels and trends). For additional information about credit quality risk ratings refer to NOTE 7 – LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR LOAN AND LEASE LOSSES. Impaired Loans and Leases A loan or lease is generally considered impaired when, based on current information and events, it is probable that Customers will be unable to collect all amounts due according to the contractual terms of the loan or lease agreement. Customers' impaired loans and leases generally include loans and leases that have been (i) placed on non-accrual, (ii) restructured in a TDR, regardless of their payment status and (iii) charged-off to their net realizable value. Factors considered by management in determining impairment include payment status, collateral value and the probability of collecting scheduled principal and interest payments when due. Loans and leases that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan or lease and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is generally measured on a loan-by-loan basis for commercial and construction loans by the present value of expected future cash flows discounted at the loan’s original effective interest rate, the loan’s obtainable market price or the fair value of the collateral if the loan is collateral dependent. The fair value of the collateral is measured based on the value of the collateral securing the loans, less estimated costs to liquidate the collateral. Collateral may be in the form of real estate or business assets including equipment, inventory and accounts receivable. The vast majority of Customers' collateral is real estate. The value of real estate collateral is determined utilizing an income or market valuation approach based on an appraisal conducted by an independent, third-party licensed appraiser using comparable market data. The value of business equipment is based upon an outside appraisal if deemed significant or the net book value on the applicable business’ financial statements if not considered significant, using comparable market data. Similarly, values for inventory and accounts receivable collateral are based on financial statement balances or aging reports. Goodwill a

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The following are the components and results of Customers' earnings per common share calculations for the periods presented. For the Years Ended December 31, 2019 2018 2017 (amounts in thousands, except share and per share data) Net income available to common shareholders $ 64,868 $ 57,236 $ 64,378 Weighted-average number of common shares outstanding – basic 31,183,841 31,570,118 30,659,320 Share-based compensation plans 462,375 658,739 1,917,451 Warrants — 4,241 19,906 Weighted-average number of common shares – diluted 31,646,216 32,233,098 32,596,677 Basic earnings per common share $ 2.08 $ 1.81 $ 2.10 Diluted earnings per common share $ 2.05 $ 1.78 $ 1.97 The following is a summary of 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. For the Years Ended December 31, 2019 2018 2017 Anti-dilutive securities: Share-based compensation awards 2,172,157 1,138,251 1,059,225

Changes In Accumulated Other Co

Changes In Accumulated Other Comprehensive Income (Loss) By Component	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss) By Component	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) BY COMPONENT The following table presents the changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2019 and 2018. Amounts in parentheses indicate reductions to accumulated other comprehensive income (loss). Available for Sale Securities (amounts in thousands) Unrealized Gains (Losses) Foreign Currency Items Total Unrealized Gains (Losses) (2) Unrealized Gains (Losses) on Cash Flow Hedges (3) Total Balance, December 31, 2017 $ (249) $ 88 $ (161) $ (198) $ (359) Reclassification of the income tax effects of the Tax Cuts and Jobs Act (1) (256) — (256) (42) (298) Reclassification of the net unrealized gains on equity securities (1) (953) (88) (1,041) — (1,041) Balance after reclassification adjustments on January 1, 2018 (1,458) — (1,458) (240) (1,698) Current period: Unrealized gains (losses) arising during period, before tax (46,069) — (46,069) 1,995 (44,074) Income tax effect 11,978 — 11,978 (518) 11,460 Other comprehensive income (loss) before reclassifications (34,091) — (34,091) 1,477 (32,614) Reclassification adjustments for losses (gains) included in net income, before tax 18,659 — 18,659 (2,917) 15,742 Income tax effect (4,851) — (4,851) 758 (4,093) Amounts reclassified from accumulated other comprehensive income (loss) to net income 13,808 — 13,808 (2,159) 11,649 Net current-period other comprehensive income (loss) (20,283) — (20,283) (682) (20,965) Balance, December 31, 2018 (21,741) — (21,741) (922) (22,663) Current period: Unrealized gains (losses) arising during period, before tax 49,688 — 49,688 (21,157) 28,531 Income tax effect (12,919) — (12,919) 5,501 (7,418) Other comprehensive income (loss) before reclassifications 36,769 — 36,769 (15,656) 21,113 Reclassification adjustments for losses (gains) included in net income, before tax (1,001) — (1,001) 1,407 406 Income, tax effect 260 — 260 (366) (106) Amounts reclassified from accumulated other comprehensive income (loss) to net income (741) — (741) 1,041 300 Net current-period other comprehensive income (loss) 36,028 — 36,028 (14,615) 21,413 Balance, December 31, 2019 $ 14,287 $ — $ 14,287 $ (15,537) $ (1,250) (1) Amounts reclassified from accumulated other comprehensive income (loss) on January 1, 2018 as a result of the adoption of ASU 2018-02 and ASU 2016-01 resulted in a decrease in accumulated other comprehensive income of $1.3 million and a corresponding increase in retained earnings for the same amount. (2) Reclassification amounts for available for sale debt securities are reported as gain or loss on sale of investment securities on the consolidated statements of income. (3) Reclassification amounts for cash flow hedges are reported as interest expense for the applicable hedged items on the consolidated statements of income or other non-interest income on the consolidated statements of income for gains recognized from the discontinuance of cash flow hedge accounting for certain interest rate swaps. No cash flow hedges were discontinued during the year ended December 31, 2019. During the year ended December 31, 2018, a reclassification amount of $95 thousand ($70 thousand net of taxes) was reported as a reduction to interest expense on FHLB advances on the consolidated statements of income and a reclassification amount of $2.8 million ($2.1 million net of taxes) was reported as other non-interest income on the consolidated statements of income from the discontinuance of cash flow hedge accounting for certain interest rate swaps.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The amortized cost and approximate fair value of investment securities as of December 31, 2019 and 2018 are summarized as follows: December 31, 2019 (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities Agency-guaranteed residential mortgage-backed securities $ 273,252 $ 5,069 $ — $ 278,321 Corporate notes (1) 284,639 14,238 — 298,877 Available for sale debt securities $ 557,891 $ 19,307 $ — 577,198 Interest-only GNMA securities (2) 16,272 Equity securities (3) 2,406 Total investment securities, at fair value $ 595,876 December 31, 2018 (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale securities Agency-guaranteed residential mortgage-backed securities $ 311,267 $ — $ (5,893) $ 305,374 Corporate notes (1) 381,407 920 (24,407) 357,920 Available for sale debt securities $ 692,674 $ 920 $ (30,300) 663,294 Equity securities (3) 1,718 Total investment securities, at fair value $ 665,012 (1) At December 31, 2019, includes corporate securities issued by domestic bank holding companies. At December 31, 2018, includes corporate securities issued by other domestic and foreign bank holding companies. (2) Reported at fair value with fair value changes recorded in non-interest income based on fair value option election. (3) Includes equity securities issued by a foreign entity. On June 28, 2019, Customers obtained ownership of certain interest-only GNMA securities that served as the primary collateral for loans made to one commercial mortgage warehouse customer through a Uniform Commercial Code private sale transaction. In connection with the acquisition of the interest-only GNMA securities, Customers recognized a pre-tax loss of $7.5 million for the year ended December 31, 2019 for the shortfall in the fair value of the interest-only GNMA securities compared to its credit exposure to this commercial mortgage warehouse customer. Upon acquisition, Customers elected the fair value option for these interest-only GNMA securities. The fair value of these securities at December 31, 2019 was $16.3 million. During the year ended December 31, 2019, Customers recognized unrealized gains of $1.3 million on its interest-only GNMA securities and equity securities. During the year ended December 31, 2018, Customers recognized unrealized losses of $1.6 million 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. The following table presents proceeds from the sale of available for sale debt securities and gross gains and gross losses realized on those sales: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Proceeds from sale of available for sale debt securities $ 97,555 $ 476,182 $ 769,203 Gross gains $ 1,931 $ — $ 8,808 Gross losses (930) (18,659) (8) Net gains (losses) $ 1,001 $ (18,659) $ 8,800 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 presents debt securities by stated maturity. Debt securities backed by mortgages and interest-only GNMA securities 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: December 31, 2019 (amounts in thousands) Amortized Cost Fair Value Due in one year or less $ — $ — Due after one year through five years 15,000 15,206 Due after five years through ten years 267,639 281,607 Due after ten years 2,000 2,064 Agency-guaranteed residential mortgage-backed securities 273,252 278,321 Interest-only classes of agency-guaranteed home equity conversion mortgage-backed securities — 16,272 Total debt securities $ 557,891 $ 593,470 At December 31, 2019, there were no available for sale debt securities in an unrealized loss position. Gross unrealized losses and fair value of Customers' available for sale debt securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2018 were as follows: December 31, 2018 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 Agency-guaranteed residential mortgage-backed securities $ 305,374 $ (5,893) $ — $ — $ 305,374 $ (5,893) Corporate notes 310,036 (24,407) — — 310,036 (24,407) Total $ 615,410 $ (30,300) $ — $ — $ 615,410 $ (30,300) At December 31, 2019 and 2018, Customers Bank had pledged investment securities aggregating $20.4 million and $23.0 million in fair value, respectively, as collateral against its borrowings primarily with the FHLB and an unused line of credit with another financial institution. These counterparties do not have the ability to sell or repledge these securities. At December 31, 2019 and 2018, no securities holdings of any one issuer, other than the U.S. Government and its agencies, amounted to greater than 10% of shareholders' equity.

Loans Held for Sale

Loans Held for Sale	12 Months Ended
	Dec. 31, 2019
Receivables Held-for-sale [Abstract]
Loans Held for Sale	LOANS HELD FOR SALE The composition of loans held for sale as of December 31, 2019 and 2018 was as follows: December 31, (amounts in thousands) 2019 2018 Commercial loans: Multi-family loans, at lower of cost or fair value $ 482,873 $ — Total commercial loans held for sale 482,873 — Consumer loans: Home equity conversion mortgages, at lower of cost or fair value 1,325 — Residential mortgage loans, at fair value 2,130 1,507 Total consumer loans held for sale 3,455 1,507 Loans held for sale $ 486,328 $ 1,507 Effective September 30, 2019, Customers Bank transferred $499.8 million of multi-family loans from loans and leases receivable (held for investment) to loans held for sale. Customers Bank transferred these loans at their carrying value, which was lower than the estimated fair value at the time of transfer. At December 31, 2019, the carrying value of these loans approximates their fair value.

Loans and Leases Receivable and

Loans and Leases Receivable and Allowance for Loan and Lease Losses	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Loans and Leases Receivable and Allowance for Loan and Lease Losses	LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR LOAN AND LEASE LOSSES The following table presents loans and leases receivable as of December 31, 2019 and 2018: December 31, (amounts in thousands) 2019 2018 Loans receivable, mortgage warehouse, at fair value $ 2,245,758 $ 1,405,420 Loans receivable: Commercial: Multi-family 1,909,274 3,285,297 Commercial and industrial (including owner occupied commercial real estate) (1) 2,441,987 1,951,277 Commercial real estate non-owner occupied 1,223,529 1,125,106 Construction 118,418 56,491 Total commercial loans and leases receivable 5,693,208 6,418,171 Consumer: Residential real estate 375,014 566,561 Manufactured housing 70,398 79,731 Other consumer 1,178,283 74,035 Total consumer loans receivable 1,623,695 720,327 Loans and leases receivable 7,316,903 7,138,498 Deferred (fees) costs and unamortized (discounts) premiums, net 2,085 (424) Allowance for loan and lease losses (56,379) (39,972) Total loans and leases receivable, net of allowance for loan and lease losses $ 9,508,367 $ 8,503,522 (1) Includes direct finance equipment leases of $89.2 million and $54.5 million at December 31, 2019 and 2018, 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. 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 December 31, 2019 and 2018, 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 ALLL and are therefore excluded from ALLL-related disclosures. Loans and leases receivable: The following tables summarize loans and leases receivable by loan and lease type and performance status as of December 31, 2019 and 2018: December 31, 2019 (amounts in thousands) 30-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Non- accrual Current (2) Purchased-credit-impaired loans (3) Total loans and leases (4) Multi-family $ 2,133 $ — $ 2,133 $ 4,117 $ 1,901,336 $ 1,688 $ 1,909,274 Commercial and industrial 2,395 — 2,395 4,531 1,882,700 354 1,889,980 Commercial real estate owner occupied 5,388 — 5,388 1,963 537,992 6,664 552,007 Commercial real estate non-owner occupied 8,034 — 8,034 76 1,211,892 3,527 1,223,529 Construction — — — — 118,418 — 118,418 Residential real estate 5,924 — 5,924 6,128 359,491 3,471 375,014 Manufactured housing (5) 3,699 1,794 5,493 1,655 61,649 1,601 70,398 Other consumer 5,756 — 5,756 1,551 1,170,793 183 1,178,283 Total $ 33,329 $ 1,794 $ 35,123 $ 20,021 $ 7,244,271 $ 17,488 $ 7,316,903 December 31, 2018 (amounts in thousands) 30-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Non- accrual Current (2) Purchased-credit-impaired loans (3) Total loans and leases (4) Multi-family $ — $ — $ — $ 1,155 $ 3,282,452 $ 1,690 $ 3,285,297 Commercial and industrial 1,914 — 1,914 17,764 1,353,586 536 1,373,800 Commercial real estate owner occupied 193 — 193 1,037 567,809 8,438 577,477 Commercial real estate non-owner occupied 1,190 — 1,190 129 1,119,443 4,344 1,125,106 Construction — — — — 56,491 — 56,491 Residential real estate 5,940 — 5,940 5,605 550,679 4,337 566,561 Manufactured housing (5) 3,926 2,188 6,114 1,693 69,916 2,008 79,731 Other consumer 200 — 200 111 73,503 221 74,035 Total $ 13,363 $ 2,188 $ 15,551 $ 27,494 $ 7,073,879 $ 21,574 $ 7,138,498 (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. (3) Purchased-credit-impaired loans aggregated into a pool are accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows, and the past due status of the pools, or that of the individual loans within the pools, is not meaningful. Due to the credit impaired nature of the loans, the loans are recorded at a discount reflecting estimated future cash flows and the Bank recognizes interest income on each pool of loans reflecting the estimated yield and passage of time. Such loans are considered to be performing. Purchased-credit-impaired loans that are not in pools accrete interest when the timing and amount of their expected cash flows are reasonably estimable, and are reported as performing loans. (4) Amounts exclude deferred costs and fees, unamortized premiums and discounts, and the ALLL. (5) Certain manufactured housing loans purchased in 2010 are supported by cash reserves held at the Bank of $0.1 million and $0.5 million at December 31, 2019 and 2018, respectively, which are used to fund past-due payments when the loan becomes 90 days or more delinquent. Each quarter, these funds are evaluated to determine if they would be sufficient to absorb the probable incurred losses within the manufactured housing portfolio. As of both December 31, 2019 and 2018, the Bank had $0.2 million, respectively, of residential real estate held in OREO. As of December 31, 2019 and 2018, the Bank had initiated foreclosure proceedings on $0.9 million and $2.1 million, respectively, in loans secured by residential real estate. Allowance for loan and lease losses: The changes in the ALLL for the years ended December 31, 2019 and 2018, and the loans and leases and ALLL by loan and lease type based on impairment-evaluation method as of December 31, 2019 and 2018 are presented in the tables below. Twelve months ended December 31, 2019 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Other consumer Total (amounts in thousands) Ending Balance, $ 11,462 $ 12,145 $ 3,320 $ 6,093 $ 624 $ 3,654 $ 145 $ 2,529 $ 39,972 Charge-offs (541) (532) (119) — — (297) — (8,101) (9,590) Recoveries 7 1,050 236 — 136 27 — 314 1,770 Provision for loan and lease losses (4,771) 2,893 (1,202) 150 502 (166) 915 25,906 24,227 Ending Balance, $ 6,157 $ 15,556 $ 2,235 $ 6,243 $ 1,262 $ 3,218 $ 1,060 $ 20,648 $ 56,379 As of December 31, 2019 (amounts in thousands) Loans and leases receivable: Individually evaluated for impairment $ 4,117 $ 4,591 $ 1,976 $ 76 $ — $ 9,063 $ 9,898 $ 1,551 $ 31,272 Collectively evaluated for impairment 1,903,469 1,885,035 543,367 1,219,926 118,418 362,480 58,899 1,176,549 7,268,143 Loans acquired with credit deterioration 1,688 354 6,664 3,527 — 3,471 1,601 183 17,488 Total loans and leases receivable $ 1,909,274 $ 1,889,980 $ 552,007 $ 1,223,529 $ 118,418 $ 375,014 $ 70,398 $ 1,178,283 $ 7,316,903 Allowance for loan and lease losses: Individually evaluated for impairment $ — $ 523 $ 83 $ — $ — $ 44 $ 129 $ 73 $ 852 Collectively evaluated for impairment 6,157 14,768 2,113 4,361 1,262 2,923 897 20,420 52,901 Loans acquired with credit deterioration — 265 39 1,882 — 251 34 155 2,626 Total allowance for loan and lease losses $ 6,157 $ 15,556 $ 2,235 $ 6,243 $ 1,262 $ 3,218 $ 1,060 $ 20,648 $ 56,379 Twelve months ended December 31, 2018 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Other consumer Total (amounts in thousands) Ending Balance, $ 12,168 $ 10,918 $ 3,232 $ 7,437 $ 979 $ 2,929 $ 180 $ 172 $ 38,015 Charge-offs — (1,722) (747) — — (466) — (1,822) (4,757) Recoveries — 403 326 5 241 76 — 21 1,072 Provision for loan and lease losses (706) 2,546 509 (1,349) (596) 1,115 (35) 4,158 5,642 Ending Balance, $ 11,462 $ 12,145 $ 3,320 $ 6,093 $ 624 $ 3,654 $ 145 $ 2,529 $ 39,972 As of December 31, 2018 (amounts in thousands) Loans and leases receivable: Individually evaluated for impairment $ 1,155 $ 17,828 $ 1,069 $ 129 $ — $ 8,631 $ 10,195 $ 111 $ 39,118 Collectively evaluated for impairment 3,282,452 1,355,436 567,970 1,120,633 56,491 553,593 67,528 73,703 7,077,806 Loans acquired with credit deterioration 1,690 536 8,438 4,344 — 4,337 2,008 221 21,574 Total loans and leases receivable $ 3,285,297 $ 1,373,800 $ 577,477 $ 1,125,106 $ 56,491 $ 566,561 $ 79,731 $ 74,035 $ 7,138,498 Allowance for loan and lease losses: Individually evaluated for impairment $ 539 $ 261 $ 1 $ — $ — $ 41 $ 3 $ — $ 845 Collectively evaluated for impairment 10,923 11,516 3,319 4,161 624 3,227 89 2,390 36,249 Loans acquired with credit deterioration — 368 — 1,932 — 386 53 139 2,878 Total allowance for loan and lease losses $ 11,462 $ 12,145 $ 3,320 $ 6,093 $ 624 $ 3,654 $ 145 $ 2,529 $ 39,972 Impaired Loans - Individually Evaluated for Impairment The following tables present the recorded investment (net of charge-offs), unpaid principal balance and related allowance by loan type for impaired loans that were individually evaluated for impairment as of December 31, 2019 and 2018 and the average recorded investment and interest income recognized for the years ended December 31, 2019, 2018 and 2017, respectively. Customers had no impaired lease receivables as of December 31, 2019 and 2018. Purchased-credit-impaired loans are considered to be performing and are not included in the tables below. December 31, 2019 For the Year Ended (amounts in thousands) Recorded investment net of charge-offs Unpaid principal balance Related allowance Average recorded investment Interest income recognized With no related allowance recorded: Multi-family $ 4,117 $ 4,117 $ — $ 1,223 $ 239 Commercial and industrial 3,084 4,726 — 7,439 1,077 Commercial real estate owner occupied 1,109 1,880 — 1,111 55 Commercial real estate non-owner occupied 76 187 — 97 7 Residential real estate 4,559 4,861 — 2,766 129 Manufactured housing 4,169 4,169 — 5,638 325 Other consumer 140 140 — 4,127 266 With an allowance recorded: Multi-family — — — 231 — Commercial and industrial 1,507 1,507 523 3,723 64 Commercial real estate owner occupied 867 878 83 278 54 Residential real estate 4,504 4,522 44 2,523 119 Manufactured housing 5,729 5,729 129 3,792 253 Other consumer 1,411 1,411 73 584 — Total $ 31,272 $ 34,127 $ 852 $ 33,532 $ 2,588 December 31, 2018 For the Year Ended, For the Year Ended, (amounts in thousands) Recorded investment net of charge-offs Unpaid principal balance Related allowance Average recorded investment Interest income recognized Average recorded investment Interest income recognized With no related allowance recorded: Multi-family $ — $ — $ — $ 537 $ 8 $ — $ — Commercial and industrial 13,660 15,263 — 8,831 673 8,865 214 Commercial real estate owner occupied 1,037 1,766 — 776 19 1,439 70 Commercial real estate non-owner occupied 129 241 — 645 48 898 2 Residential real estate 4,842 5,128 — 4,129 151 4,617 24 Manufactured housing 10,027 10,027 — 10,015 561 10,003 558 Other consumer 111 111 — 89 1 51 — With an allowance recorded: Multi-family 1,155 1,155 539 231 37 — — Commercial and industrial 4,168 4,351 261 6,504 25 5,984 230 Commercial real estate owner occupied 32 32 1 443 3 882 — Residential real estate 3,789 3,789 41 4,566 131 3,307 187 Manufactured housing 168 168 3 214 14 131 8 Total $ 39,118 $ 42,031 $ 845 $ 36,980 $ 1,671 $ 36,177 $ 1,293 Troubled Debt Restructurings At December 31, 2019, 2018 and 2017, there were $13.3 million, $19.2 million and $20.4 million, respectively, in loans reported as TDRs. TDRs are reported as impaired loans in the calendar year of their restructuring and are evaluated to determine whether they should be placed on non-accrual status. In subsequent years, 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. Modifications of PCI loans that are accounted for within loan pools in accordance with the accounting standards for PCI loans do not result in the removal of these loans from the pool even if the modifications would otherwise be considered a TDR. Accordingly, as each pool is accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows, modifications of loans within such pools are not considered TDRs. Customers had no lease receivables that had been restructured as a TDR as of December 31, 2019, 2018 and 2017, respectively. The following table presents total TDRs based on loan type and accrual status at December 31, 2019, 2018 and 2017. Nonaccrual TDRs are included in the reported amount of total non-accrual loans. December 31, 2019 2018 2017 Accruing TDRs Nonaccrual TDRs Total Accruing TDRs Nonaccrual TDRs Total Accruing TDRs Nonaccrual TDRs Total (amounts in thousands) Commercial and industrial $ 60 $ 23 $ 83 $ 64 $ 5,273 $ 5,337 $ 63 $ 5,939 $ 6,002 Commercial real estate owner occupied 13 — 13 32 — 32 — — — Residential real estate 2,935 631 3,566 3,026 667 3,693 3,828 703 4,531 Manufactured housing 8,243 1,382 9,625 8,502 1,620 10,122 8,130 1,766 9,896 Other consumer — 10 10 — 12 12 — — — Total TDRs $ 11,251 $ 2,046 $ 13,297 $ 11,624 $ 7,572 $ 19,196 $ 12,021 $ 8,408 $ 20,429 The following table presents loans modified in a TDR by type of concession for the years ended December 31, 2019, 2018 and 2017. There were no modifications that involved forgiveness of debt for the years ended December 31, 2019, 2018 and 2017. For the Years Ended December 31, 2019 2018 2017 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Extensions of maturity 2 $ 514 2 $ 60 5 $ 6,497 Interest-rate reductions 26 923 39 1,615 35 1,574 Total 28 $ 1,437 41 $ 1,675 40 $ 8,071 The following table provides, by loan type, the number of loans modified in TDRs and the related recorded investment for the years ended December 31, 2019, 2018 and 2017. For the Years Ended December 31, 2019 2018 2017 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Commercial and industrial 1 $ 431 — $ — 4 $ 6,437 Residential real estate 1 83 2 352 — — Manufactured housing 26 923 38 1,310 36 1,634 Other consumer — — 1 13 — — Total loans 28 $ 1,437 41 $ 1,675 40 $ 8,071 As of December 31, 2019, there were no commitments to lend additional funds to borrowers whose loans have been modified in TDRs. As of December 31, 2018 and 2017, except for one commercial and industrial loan with an outstanding commitment of $1.5 million and $2.1 million, respectively, there were no other 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: December 31, 2019 December 31, 2018 December 31, 2017 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Residential real estate $ 1 $ 81 $ — $ — $ — $ — Manufactured housing 3 73 4 92 5 211 Total loans 4 $ 154 4 $ 92 5 $ 211 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 ALLL. During the year ended December 31, 2019, allowances totaling $17 thousand were recorded on fifteen loans that had been modified in TDRs. There were no allowances recorded as a result of TDR modifications during 2018. For the year ended December 31, 2017, there was one allowance resulting from TDR modifications totaling $1 thousand for one manufactured housing loan. Purchased-Credit-Impaired Loans The changes in accretable yield related to PCI loans for the years ended December 31, 2019, 2018 and 2017 were as follows: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Accretable yield balance, beginning of period $ 6,178 $ 7,825 $ 10,202 Accretion to interest income (1,144) (1,455) (1,673) Reclassification from nonaccretable difference and disposals, net 44 (192) (704) Accretable yield balance, end of period $ 5,078 $ 6,178 $ 7,825 Credit Quality Indicators The ALLL represents management's estimate of probable losses in Customers' loans and leases receivable portfolio, excluding commercial mortgage warehouse loans reported at fair value pursuant to a fair value option election. 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 other consumer 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 for purposes of analyzing historical loss rates used in the determination of the ALLL for the respective loan portfolios, 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 risk rating grades are defined as follows: “1” – Pass / Excellent Loans and leases rated 1 represent a credit extension of the highest quality. The borrower’s historic (at least five years) cash flows manifest extremely large and stable margins of coverage. Balance sheets are conservative, well capitalized, and liquid. After considering debt service for proposed and existing debt, projected cash flows continue to be strong and provide ample coverage. The borrower typically reflects broad geographic and product diversification and has access to alternative financial markets. “2” – Pass / Superior Loans and leases rated 2 are those for which the borrower has a strong financial condition, balance sheet, operations, cash flow, debt capacity and coverage with ratios better than industry norms. The borrowers of these loans and leases exhibit a limited leverage position, are virtually immune to local economies, and are in stable growing industries. The management team is well respected, and the company has ready access to public markets. “3” – Pass / Strong Loans and leases rated 3 are those loans and leases for which the borrowers have above average financial condition and flexibility; more than satisfactory debt service coverage; balance sheet and operating ratios are consistent with or better than industry peers; operate in industries with little risk; move in diversified markets; and are experienced and competent in their industry. These borrowers’ access to capital markets is limited mostly to private sources, often secured, but the borrower typically has access to a wide range of refinancing alternatives. “4” – Pass / Good Loans and leases rated 4 have a sound primary and secondary source of repayment. The borrower may have access to alternative sources of financing, but sources are not as widely available as they are to a higher-grade borrower. These loans and leases carry a normal level of risk with very low loss exposure. The borrower has the ability to perform according to the terms of the credit facility. The margins of cash flow coverage are satisfactory but vulnerable to more rapid deterioration than the higher-quality loans and leases. “5” – Satisfactory Loans and leases rated 5 are extended to borrowers who are considered to be a reasonable credit risk and demonstrate the ability to repay the debt from normal business operations. Risk factors may include reliability of margins and cash flows, liquidity, dependence on a single product or industry, cyclical trends, depth of management, or limited access to alternative financing sources. The borrower’s historical financial information may indicate erratic performance, but current trends are positive and the quality of financial information is adequate, but is not as detailed and sophisticated as information found on higher grade loans. If adverse circumstances arise, the impact on the borrower may be significant. “6” – Satisfactory / Bankable with Care Loans and leases rated 6 are those for which the borrower has higher than normal credit risk; however, cash flow and asset values are generally intact. These borrowers may exhibit declining financial characteristics, with increasing leverage and decreasing liquidity and may have limited resources and access to financial alternatives. Signs of weakness in these borrowers may include delinquent taxes, trade slowness and eroding profit margins. “7” – Special Mention Loans and leases rated 7 are credit facilities that may have potential developing weaknesses and deserve extra attention from the account manager and other management personnel. In the event potential weaknesses are not corrected or mitigated, deterioration in the ability of the borrower to repay the debt in the future may occur. This grade is not assigned to loans and leases that bear certain peculiar risks normally associated with the type of financing involved, unless circumstances have caused the risk to increase to a level higher than would have been acceptable when the credit was originally approved. Loans and leases where significant actual, not potential, weaknesses or problems are clearly evident are graded in the category below. “8” – Substandard Loans and leases are rated 8 when the loans and leases are inadequately protected by the current sound worth and payment capacity of the obligor or of the collateral pledged, if any. Loans and leases so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt and are characterized by the distinct possibility that the company will sustain some loss if the weaknesses are not corrected. “9” – Doubtful The Bank assigns a doubtful rating to loans and leases that have all the attributes of a substandard rating with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The possibility of loss is extremely high, but because of certain important and reasonable specific pending factors that may work to the advantage of and strengthen the credit quality of the loan or lease, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors may include a proposed merger or acquisition, liquidation proceeding, capital injection, perfecting liens on additional collateral or refinancing plans. “10” – Loss The Bank assigns a loss rating to loans and leases considered uncollectible and of such little value that their continuance as an active asset is not warranted. Amounts classified as loss are immediately charged off. 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 December 31, 2019 and 2018. December 31, 2019 (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 Other consumer Total (3) Pass/Satisfactory $ 1,816,200 $ 1,841,074 $ 536,777 $ 1,129,838 $ 118,418 $ — $ — $ — $ 5,442,307 Special Mention 69,637 26,285 8,286 6,949 — — — — 111,157 Substandard 23,437 22,621 6,944 86,742 — — — — 139,744 Performing (1) — — — — — 362,962 63,250 1,170,976 1,597,188 Non-performing (2) — — — — — 12,052 7,148 7,307 26,507 Total $ 1,909,274 $ 1,889,980 $ 552,007 $ 1,223,529 $ 118,418 $ 375,014 $ 70,398 $ 1,178,283 $ 7,316,903 December 31, 2018 (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 Other consumer Total (3) Pass/Satisfactory $ 3,201,822 $ 1,306,466 $ 562,639 $ 1,054,493 $ 56,491 $ — $ — $ — $ 6,181,911 Special Mention 55,696 30,551 9,730 30,203 — — — — 126,180 Substandard 27,779 36,783 5,108 40,410 — — — — 110,080 Performing (1) — — — — — 555,016 71,924 73,724 700,664 Non-performing (2) — — — — — 11,545 7,807 311 19,663 Total $ 3,285,297 $ 1,373,800 $ 577,477 $ 1,125,106 $ 56,491 $ 566,561 $ 79,731 $ 74,035 $ 7,138,498 (1) Includes residential real estate, manufactured housing, and other consumer loans not assigned internal ratings. (2) Includes residential real estate, manufactured housing, and other consumer loans that are past due and still accruing interest or on nonaccrual status. (3) Excludes commercial mortgage warehouse loans reported at fair value. Loan Purchases and Sales Purchases and sales of loans were as follows for the years ended December 31, 2019, 2018 and 2017: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Purchases (1) Residential real estate $ 105,858 $ 368,402 $ 264,090 Other consumer (2) 1,058,261 30,066 — Total $ 1,164,119 $ 398,468 $ 264,090 Sales (3) Multi-family $ — $ (54,638) $ (226,831) Commercial and industrial (4) (22,267) (32,263) (19,974) Commercial real estate owner occupied (4) (16,320) (20,218) (19,813) Residential real estate (230,285) — (191,574) Total $ (268,872) $ (107,119) $ (458,192) (1) Amounts reported represent the unpaid principal balance at time of purchase. The purchase price was 100.3%, 99.9% and 99.4% of loans outstanding for the years ended December 31, 2019, 2018 and 2017, respectively. (2) Other consumer loan purchases for the year ended December 31, 2019 and 2018, consist of third-party originated unsecured consumer loans. None of the loans are considered sub-prime at the time of origination. Customers considers sub-prime borrowers to be those with FICO scores below 660. (3) Amounts reported represent the unpaid principal balance at time of sale. For the years ended December 31, 2019, 2018 and 2017, loan sales resulted in net gains of $2.8 million, $3.3 million and $4.2 million, respectively. (4) Primarily sales of SBA loans. Loans Pledged as Collateral Customers has pledged eligible real estate loans as collateral for potential borrowings from the FHLB and FRB in the amount of $4.6 billion and $5.4 billion at December 31, 2019 and 2018, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	LEASES Lessee Customers has operating leases for its branches, LPOs, and administrative offices, with remaining lease terms ranging between 4 months and 8 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 ROU asset and are recognized in the period in which the obligations 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 or the commencement date of the lease, whichever was later, when determining the present value of lease payments. Customers does not present ROU assets and corresponding liabilities for operating leases for fiscal years prior to the adoption of this standard. A ROU asset of $23.8 million, net of $1.1 million in accrued rent, and lease liabilities of $24.9 million were recognized with the adoption of ASU 2016-02 on January 1, 2019. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification December 31, 2019 ASSETS Operating lease ROU assets Other assets $ 20,232 LIABILITIES Operating lease liabilities Other liabilities $ 21,358 The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: (amounts in thousands) Classification Year Ended December 31, 2019 Operating lease cost (1) Occupancy expenses $ 5,823 (1) There were no variable lease costs for the year ended December 31, 2019, and sublease income for operating leases is immaterial. Maturities of non-cancelable operating lease liabilities were as follows at December 31, 2019: (amounts in thousands) December 31, 2019 2020 $ 5,539 2021 4,792 2022 4,167 2023 3,174 2024 2,100 Thereafter 2,817 Total minimum payments 22,589 Less: interest 1,231 Present value of lease liabilities $ 21,358 Customers does not have leases where it is involved with the construction or design of an underlying asset. Customers has signed leases that have not yet commenced as of December 31, 2019 with future minimum lease payments of $2.6 million. Cash paid pursuant to operating lease liabilities was $5.9 million for the year ended December 31, 2019, and is 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 December 31, 2019: (amounts in thousands) December 31, 2019 Weighted average remaining lease term (years) Operating leases 5.0 years Weighted average discount rate Operating leases 2.90 % Rent expense was approximately $5.8 million and $5.2 million for the years ended December 31, 2018 and 2017, respectively. 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 for a Split-TRAC is there a residual risk and the unguaranteed portions are typically nominal. 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 leased assets for impairment. An impairment loss is recognized if the carrying amount of the leased asset exceeds its fair value and is not recoverable. The carrying amount of 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 December 31, 2019: (amounts in thousands) Classification December 31, 2019 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 91,762 Guaranteed residual assets Loans and leases receivable 7,435 Unguaranteed residual assets Loans and leases receivable 1,260 Deferred initial direct costs Loans and leases receivable 721 Unearned income Loans and leases receivable (11,300) Net investment in direct financing leases $ 89,878 Operating leases Investment in operating leases Other assets $ 107,850 Accumulated depreciation Other assets (14,251) Deferred initial direct costs Other assets 1,052 Net investment in operating leases 94,651 Total lease assets $ 184,529
Leases	LEASES Lessee Customers has operating leases for its branches, LPOs, and administrative offices, with remaining lease terms ranging between 4 months and 8 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 ROU asset and are recognized in the period in which the obligations 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 or the commencement date of the lease, whichever was later, when determining the present value of lease payments. Customers does not present ROU assets and corresponding liabilities for operating leases for fiscal years prior to the adoption of this standard. A ROU asset of $23.8 million, net of $1.1 million in accrued rent, and lease liabilities of $24.9 million were recognized with the adoption of ASU 2016-02 on January 1, 2019. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification December 31, 2019 ASSETS Operating lease ROU assets Other assets $ 20,232 LIABILITIES Operating lease liabilities Other liabilities $ 21,358 The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: (amounts in thousands) Classification Year Ended December 31, 2019 Operating lease cost (1) Occupancy expenses $ 5,823 (1) There were no variable lease costs for the year ended December 31, 2019, and sublease income for operating leases is immaterial. Maturities of non-cancelable operating lease liabilities were as follows at December 31, 2019: (amounts in thousands) December 31, 2019 2020 $ 5,539 2021 4,792 2022 4,167 2023 3,174 2024 2,100 Thereafter 2,817 Total minimum payments 22,589 Less: interest 1,231 Present value of lease liabilities $ 21,358 Customers does not have leases where it is involved with the construction or design of an underlying asset. Customers has signed leases that have not yet commenced as of December 31, 2019 with future minimum lease payments of $2.6 million. Cash paid pursuant to operating lease liabilities was $5.9 million for the year ended December 31, 2019, and is 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 December 31, 2019: (amounts in thousands) December 31, 2019 Weighted average remaining lease term (years) Operating leases 5.0 years Weighted average discount rate Operating leases 2.90 % Rent expense was approximately $5.8 million and $5.2 million for the years ended December 31, 2018 and 2017, respectively. 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 for a Split-TRAC is there a residual risk and the unguaranteed portions are typically nominal. 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 leased assets for impairment. An impairment loss is recognized if the carrying amount of the leased asset exceeds its fair value and is not recoverable. The carrying amount of 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 December 31, 2019: (amounts in thousands) Classification December 31, 2019 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 91,762 Guaranteed residual assets Loans and leases receivable 7,435 Unguaranteed residual assets Loans and leases receivable 1,260 Deferred initial direct costs Loans and leases receivable 721 Unearned income Loans and leases receivable (11,300) Net investment in direct financing leases $ 89,878 Operating leases Investment in operating leases Other assets $ 107,850 Accumulated depreciation Other assets (14,251) Deferred initial direct costs Other assets 1,052 Net investment in operating leases 94,651 Total lease assets $ 184,529
Leases	LEASES Lessee Customers has operating leases for its branches, LPOs, and administrative offices, with remaining lease terms ranging between 4 months and 8 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 ROU asset and are recognized in the period in which the obligations 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 or the commencement date of the lease, whichever was later, when determining the present value of lease payments. Customers does not present ROU assets and corresponding liabilities for operating leases for fiscal years prior to the adoption of this standard. A ROU asset of $23.8 million, net of $1.1 million in accrued rent, and lease liabilities of $24.9 million were recognized with the adoption of ASU 2016-02 on January 1, 2019. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification December 31, 2019 ASSETS Operating lease ROU assets Other assets $ 20,232 LIABILITIES Operating lease liabilities Other liabilities $ 21,358 The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: (amounts in thousands) Classification Year Ended December 31, 2019 Operating lease cost (1) Occupancy expenses $ 5,823 (1) There were no variable lease costs for the year ended December 31, 2019, and sublease income for operating leases is immaterial. Maturities of non-cancelable operating lease liabilities were as follows at December 31, 2019: (amounts in thousands) December 31, 2019 2020 $ 5,539 2021 4,792 2022 4,167 2023 3,174 2024 2,100 Thereafter 2,817 Total minimum payments 22,589 Less: interest 1,231 Present value of lease liabilities $ 21,358 Customers does not have leases where it is involved with the construction or design of an underlying asset. Customers has signed leases that have not yet commenced as of December 31, 2019 with future minimum lease payments of $2.6 million. Cash paid pursuant to operating lease liabilities was $5.9 million for the year ended December 31, 2019, and is 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 December 31, 2019: (amounts in thousands) December 31, 2019 Weighted average remaining lease term (years) Operating leases 5.0 years Weighted average discount rate Operating leases 2.90 % Rent expense was approximately $5.8 million and $5.2 million for the years ended December 31, 2018 and 2017, respectively. 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 for a Split-TRAC is there a residual risk and the unguaranteed portions are typically nominal. 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 leased assets for impairment. An impairment loss is recognized if the carrying amount of the leased asset exceeds its fair value and is not recoverable. The carrying amount of 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 December 31, 2019: (amounts in thousands) Classification December 31, 2019 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 91,762 Guaranteed residual assets Loans and leases receivable 7,435 Unguaranteed residual assets Loans and leases receivable 1,260 Deferred initial direct costs Loans and leases receivable 721 Unearned income Loans and leases receivable (11,300) Net investment in direct financing leases $ 89,878 Operating leases Investment in operating leases Other assets $ 107,850 Accumulated depreciation Other assets (14,251) Deferred initial direct costs Other assets 1,052 Net investment in operating leases 94,651 Total lease assets $ 184,529

Bank Premises and Equipment

Bank Premises and Equipment	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Bank Premises and Equipment	BANK PREMISES AND EQUIPMENT The components of bank premises and equipment as of December 31, 2019 and 2018 were as follows: December 31, (amounts in thousands) Expected Useful Life 2019 2018 Leasehold improvements 3 to 25 years $ 14,218 $ 14,080 Furniture, fixtures and equipment 5 to 10 years 6,333 7,110 IT equipment 3 to 5 years 10,016 8,645 Automobiles 3 to 5 years 492 455 31,059 30,290 Accumulated depreciation and amortization (21,670) (19,227) Total $ 9,389 $ 11,063 Depreciation expense and amortization of leasehold improvements, which are included on the consolidated statements of income in occupancy expenses, were $3.4 million, $2.7 million and $2.8 million for the years ended December 31, 2019, 2018 and 2017, respectively.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Deposits	DEPOSITS The components of deposits at December 31, 2019 and 2018 were as follows: December 31, (amounts in thousands) 2019 2018 Demand, non-interest bearing $ 1,343,391 $ 1,122,171 Demand, interest bearing 1,235,292 803,948 Savings, including money market deposit accounts 4,401,719 3,481,936 Time, $100,000 and over 402,161 792,370 Time, other 1,266,373 941,811 Total deposits $ 8,648,936 $ 7,142,236 The scheduled maturities for time deposits at December 31, 2019 were as follows: (amounts in thousands) December 31, 2019 2020 $ 1,467,088 2021 175,994 2022 19,489 2023 2,490 2024 3,473 Total time deposits $ 1,668,534 Time deposits greater than $250,000 totaled $0.2 billion and $0.5 billion at December 31, 2019 and 2018, respectively. Included in the demand, interest bearing balances above were $82.1 million and $5.2 million of brokered demand deposits at December 31, 2019 and 2018, respectively. Included in the savings and MMDA balances above were $0.3 billion and $0.6 billion of brokered money market deposits at December 31, 2019 and 2018, respectively. Also included in time, other balances above were $1.1 billion and $0.8 billion of brokered time deposits, respectively, at December 31, 2019 and 2018.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Borrowings	BORROWINGS Short-term debt Short-term debt at December 31, 2019 and 2018 was as follows: December 31, 2019 2018 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ 500,000 2.15 % $ 1,248,070 2.62 % Federal funds purchased 538,000 1.60 % 187,000 2.60 % Total short-term debt $ 1,038,000 $ 1,435,070 The following is a summary of additional information relating to Customers' short-term debt: December 31, (dollars in thousands) 2019 2018 2017 FHLB advances Maximum outstanding at any month end $ 1,190,150 $ 2,622,165 $ 2,283,250 Average balance during the year 793,304 1,526,180 1,415,755 Weighted-average interest rate during the year 2.66 % 2.05 % 1.44 % Federal funds purchased Maximum outstanding at any month end 600,000 195,000 238,000 Average balance during the year 271,400 156,652 163,466 Weighted-average interest rate during the year 2.28 % 1.92 % 1.19 % At December 31, 2019 and 2018, Customers Bank had aggregate availability under federal funds lines totaling $551.0 million and $522.0 million, respectively. Long-term debt FHLB and FRB advances Long-term FHLB and FRB advances at December 31, 2019 and 2018 were as follows: December 31, 2019 2018 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ 350,000 2.36 % $ — — % Total long-term FHLB advances $ 350,000 $ — There were no advances outstanding with the FRB at December 31, 2019 and 2018, respectively. The maximum borrowing capacity with the FHLB and FRB at December 31, 2019 and 2018, was as follows: December 31, (amounts in thousands) 2019 2018 Total maximum borrowing capacity with the FHLB $ 3,445,416 $ 4,146,899 Total maximum borrowing capacity with the FRB 136,842 102,461 Qualifying loans serving as collateral against FHLB and FRB advances 4,496,983 5,221,957 Senior and Subordinated Debt Long-term senior notes and subordinated debt at December 31, 2019 and 2018 were as follows: December 31, (dollars in thousands) 2019 2018 Issued by Ranking Amount Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior $ 24,432 $ — 4.500 % $ 25,000 September 2019 September 2024 100.000 % Customers Bancorp Senior 99,198 98,911 3.950 % 100,000 June 2017 June 2022 99.775 % Customers Bancorp Senior — 24,960 4.625 % 25,000 June 2014 June 2019 100.000 % Total other borrowings 123,630 123,871 Customers Bancorp Subordinated (1)(2) 72,040 — 5.375 % 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (1)(3) 109,075 108,977 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 181,115 $ 108,977 (1) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (2) Customers Bancorp has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after December 30, 2029.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS’ EQUITY Common Stock During 2019, 2018 and 2017, Customers Bancorp did not issue any shares of its common stock other than in connection with share-based compensation programs. In November 2013, Customers Bancorp announced that its Board of Directors had authorized a stock repurchase plan in which it could acquire up to 5% of its current outstanding shares at prices not to exceed a 20% premium over the then current book value. In December 2018, Customers Bancorp announced that its Board of Directors amended the terms of the November 2013 stock repurchase plan to allow purchases to be made at prices not to exceed the book value per share of Customers' common stock measured as of September 30, 2018. In January 2019, Customers repurchased 31,159 shares of its common stock at a weighted average price of $18.35. In December 2018, Customers Bancorp repurchased 719,200 shares of its common stock at a weighted average price of $18.04. There was no stock repurchased during 2017. Customers repurchased all remaining authorized shares pursuant to this program in January 2019. Preferred Stock Customers Bancorp currently has four series of preferred stock outstanding. During 2019, 2018 and 2017, Customers Bancorp did not issue any preferred stock. 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 December 31, Carrying value at December 31, Contractual Rate in Effect at December 31, 2019 Date at which dividend rate becomes floating and earliest redemption date Floating rate of Three-Month LIBOR Plus: Dividend Paid Per Share in 2019 Fixed-to-floating rate: Issue Date 2019 2018 2019 2018 Series C May 18, 2015 2,300,000 2,300,000 $ 55,569 $ 55,569 7.00 % June 15, 2020 5.300 % $ 1.75 Series D January 29, 2016 1,000,000 1,000,000 24,108 24,108 6.50 % March 15, 2021 5.090 % $ 1.63 Series E April 28, 2016 2,300,000 2,300,000 55,593 55,593 6.45 % June 15, 2021 5.140 % $ 1.61 Series F September 16, 2016 3,400,000 3,400,000 82,201 82,201 6.00 % December 15, 2021 4.762 % $ 1.50 Totals 9,000,000 9,000,000 $ 217,471 $ 217,471 The net proceeds from the preferred stock offerings were used for general corporate purposes, which included working capital and the funding of organic growth at Customers Bank. Dividends on the Series C, Series D, Series E and Series F Preferred Stock are not cumulative. If Customers Bancorp's board of directors or a duly authorized committee of the board does not declare a dividend on the Series C, Series D, Series E and Series F Preferred Stock in respect of a dividend period, then no dividend shall be deemed to have accrued for such dividend period, be payable on the applicable dividend payment date, or be cumulative, and Customers Bancorp will have no obligation to pay any dividend for that dividend period, whether or not the board of directors or a duly authorized committee of the board declares a dividend on the Series C, Series D, Series E, and Series F Preferred Stock for any future dividend period. The Series C, Series D, Series E and Series F Preferred Stock have no stated maturity, are not subject to any mandatory redemption, sinking fund or other similar provisions and will remain outstanding unless redeemed at Customers Bancorp's option. Customers Bancorp may redeem the Series C, Series D, Series E and Series F Preferred Stock at its option, at a redemption price equal to $25.00 per share, plus any declared and unpaid dividends (without regard to any undeclared dividends), (i) in whole or in part, from time to time, on any dividend payment date on or after June 15, 2020, for the Series C Preferred Stock, March 15, 2021, for the Series D Preferred Stock, June 15, 2021, for the Series E Preferred Stock and December 15, 2021, for the Series F Preferred Stock and or (ii) in whole but not in part, within 90 days following the occurrence of a regulatory capital treatment event. Any redemption of the Series C, Series D, Series E and Series F Preferred Stock is subject to prior approval of the Federal Reserve Board. The Series C, Series D, Series E and Series F Preferred Stock qualify as Tier 1 capital under regulatory capital guidelines. Except in limited circumstances, the Series C, Series D, Series E and Series F Preferred Stock do not have any voting rights.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS 401(k) Plan Customers has a 401(k) profit sharing plan whereby eligible team members may contribute amounts up to the annual IRS statutory contribution limit. Customers provides a matching contribution equal to 50% of the first 6% of the contribution made by the team member. Employer contributions for the years ended December 31, 2019, 2018 and 2017 were $2.2 million, $2.1 million, and $1.9 million, respectively. Supplemental Executive Retirement Plan Customers entered into a SERP with its Chairman and CEO that provides annual retirement benefits for a 15-year period upon the later of his reaching the age of 65 or when he terminates employment. The SERP is a defined-contribution type of deferred-compensation arrangement that is designed to provide a target annual retirement benefit of $300,000 per year for 15 years starting at age 65, based on an assumed constant rate of return of 7% per year. The level of retirement benefit is not guaranteed by Customers, and the ultimate retirement benefit can be less than or greater than the target. Customers funds its obligations under the SERP with the increase in cash surrender value of a life insurance policy on the life of the Chairman and CEO which it owns. The present value of the amount owed as of December 31, 2019 and 2018 was $5.5 million and $4.3 million, respectively, and was included in other liabilities.

Share-Based Compensation Plans

Share-Based Compensation Plans	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Share-Based Compensation Plans	SHARE-BASED COMPENSATION PLANS Summary During 2019, the shareholders of Customers Bancorp approved the 2019 Plan, during 2010, the shareholders of Customers Bancorp approved the 2010 Plan, and during 2012, the shareholders of Customers Bancorp approved the 2004 Plan. The 2019 Plan was approved by the shareholders of Customers at its 2019 Annual Meeting of Shareholders on May 30, 2019 and allows for the issuance of 1,500,000 shares. The purpose of these plans is to promote the success and enhance the value of Customers Bancorp by linking the personal interests of the members of the Board of Directors, team members, officers and executives of Customers to those of the shareholders of Customers and by providing such individuals with an incentive for outstanding performance in order to generate superior returns to shareholders of Customers. The 2019 Plan, 2010 Plan and 2004 Plan are intended to provide flexibility to Customers in its ability to motivate, attract and retain the services of members of the Board of Directors, team members, officers and executives of Customers. Stock options and restricted stock units normally vest on the third or fifth anniversary of the grant date provided the grantee remains employed by Customers or continues to serve on the Board. With respect to certain stock options granted under the 2010 Plan, vested options shall be exercisable only when Customers' fully diluted tangible book value will have increased by 50% from the date of grant. Share-based awards generally provide for accelerated vesting if there is a change in control (as defined in the Plans). No stock options may be exercisable for more than 10 years from the date of grant. The 2019, 2010 and 2004 Plans are administered by the Compensation Committee of the Board of Directors. The 2019 Plan provides for the grant of options, some or all of which may be structured to qualify as Incentive Stock Options if granted to team members, stock appreciation rights, restricted stock, restricted stock units and unrestricted stock to team members, officers, executives, members of the Board of Directors, consultants, and advisors. The maximum number of shares of common stock which may be issued under the 2019 Plan is 1,500,000 shares. The 2010 Plan provides exclusively for the grant of stock options, some or all of which may be structured to qualify as Incentive Stock Options, to team members, officers and executives. The maximum number of shares of common stock which may be issued under the 2010 Plan is 3,666,667 shares. The 2004 Plan provides for the grant of options, some or all of which may be structured to qualify as Incentive Stock Options if granted to team members, stock appreciation rights, restricted stock, restricted stock units and unrestricted stock to team members, officers, executives and members of the Board of Directors. The maximum number of shares of common stock which may be issued under the 2004 Plan is 2,750,000 shares. On January 1, 2011, Customers initiated a BRRP. This is a restricted stock unit plan. Team members eligible to participate in the BRRP included the CEO and other senior management and highly compensated team members as determined by the Compensation Committee at its sole discretion. Under the BRRP, a participant elected to defer not less than 25%, nor more than 50%, of his or her bonus payable with respect to each year of participation. Shares of common stock having a value equal to the portion of the bonus deferred by a participant were allocated to an annual deferral account, and a matching amount equal to an identical number of shares of common stock was also allocated to the annual deferral account. A participant becomes 100% vested in the annual deferral account on the fifth anniversary date of the initial funding of the account, provided he or she remains continuously employed by Customers from the date of funding to the anniversary date. Customers discontinued the BRRP in 2019, upon receipt of shareholder approval of the 2019 Plan. Vesting is accelerated in the event of involuntary termination other than for cause, retirement at or after age 65, death, termination on account of disability or a change in control of Customers. Participants were first eligible to make elections under the BRRP with respect to their bonuses for 2011, which were payable in first quarter 2012. The BRRP did not provide for a specific number of shares to be reserved; by its terms, the award of restricted stock units under this plan is limited by the amount of cash bonuses paid to the participants in the plan. At December 31, 2019, non-vested restricted stock units outstanding under this plan totaled 190,340. At December 31, 2019, the aggregate number of shares of common stock available for grant under all share-based compensation plans was 2,052,597 shares. Share-based-compensation expense relating to stock options and restricted stock units is recognized on a straight-line basis over the vesting periods of the awards and is a component of salaries and employee benefits expense. Total share-based- compensation expense for 2019, 2018 and 2017 was $8.9 million, $8.6 million and $6.1 million, respectively. At December 31, 2019, there was $16.4 million of unrecognized compensation cost related to all non-vested share-based compensation awards. This cost is expected to be recognized through December 2024. In 2014, the shareholders of Customers Bancorp approved an ESPP. The ESPP is intended to encourage team member participation in the ownership and economic progress of Customers. This plan is intended to qualify as an ESPP within the meaning of the Internal Revenue Code and is administered by the Compensation Committee of the Board of Directors. Under the ESPP, team members may elect to purchase shares of Customers' common stock through payroll deductions. Because the purchase price under the plan is 85% of the fair market value of a share of common stock on the first day of each quarterly subscription period (a 15% discount to the market price), Customers' ESPP is considered to be a compensatory plan under current accounting guidance. Therefore, the entire amount of the discount is recognizable compensation expense. ESPP expense for 2019, 2018 and 2017 was $170 thousand, $141 thousand, and $132 thousand, respectively. Stock Options Customers estimated the fair value of each option on the date of grant generally using the Black-Scholes option pricing model. The risk-free interest rate was based upon the zero-coupon Treasury rates in effect on the grant date of the options based on the expected life of the option. Expected volatility was based upon limited historical information because Customers' common stock has only been traded since February 2012. Expected life was management’s estimate which took into consideration the vesting requirement, generally three five During 2019, options to purchase an aggregate of 577,230 shares of Customers Bancorp voting common stock were granted to certain officers and team members. The exercise price for the options granted was equal to the closing price of Customers Bancorp's voting common stock on the date of grant. The options issued are subject to a three The following table presents the weighted-average assumptions used and the resulting weighted-average fair value of each option granted for the periods presented. 2019 2018 2017 Weighted-average risk-free interest rate 1.69 % 2.87 % 2.35 % Expected dividend yield — % — % — % Weighted-average expected volatility 29.92 % 25.47 % 25.05 % Weighted-average expected life (in years) 7.00 7.00 7.00 Weighted-average fair value of each option granted $ 5.56 $ 10.05 $ 8.68 The following table summarizes stock option activity for the year ended December 31, 2019: Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term in Years Aggregate Intrinsic Value (dollars in thousands, except weighted-average exercise price) Outstanding, December 31, 2018 2,520,526 $ 22.13 Granted 577,230 19.05 Exercised (82,500) 16.79 $ 341 Expired (90,000) 25.19 Forfeited (95,008) 21.19 Outstanding, December 31, 2019 2,830,248 $ 21.59 6.45 $ 9,212 Exercisable at December 31, 2019 766,739 $ 15.52 3.46 $ 6,390 Cash received from the exercise of the stock options during the year ended December 31, 2019 was $1.4 million. The tax liability resulting from option exercises totaled $0.2 million in 2019. A summary of the status of Customers' non-vested options at December 31, 2019, and changes during the year ended December 31, 2019 was as follows: Options Weighted- Average exercise price Non-vested at December 31, 2018 1,671,223 $ 25.10 Granted 577,230 19.05 Vested (89,936) 19.33 Forfeited (95,008) 21.19 Non-vested at December 31, 2019 2,063,509 23.85 Restricted Stock Units The fair value of restricted stock units granted under the 2019 and 2004 Plans is generally determined based on the closing market price of Customers' common stock on the date of grant. The fair value of restricted stock units granted under the BRRP was measured as of the date on which such portion of the bonus would have been paid had the deferral not been elected. Beginning in 2018, the Compensation Committee recommended and the Board of Directors approved a new long-term incentive compensation plan which incorporates performance metrics into the restricted stock awards for certain of Customers' key officers. Specifically, 40% of the restricted stock units granted as long term incentive compensation will vest ratably over three years. The remaining 60% will vest upon Customers meeting certain performance metrics, including total shareholder return, return on average common equity, and average NPAs to total assets over a three-year period relative to the performance of its peer group. The performance conditions are considered probable. There were 177,627 restricted stock units granted during the year ended December 31, 2019. Of the aggregate restricted stock units granted, 5,447 were granted under the BRRP and are subject to five three three The table below presents the status of the restricted stock units at December 31, 2019, and changes during the year ended December 31, 2019: Restricted Stock Units Weighted- Average Grant- Date Fair Value Outstanding and unvested at December 31, 2018 884,659 $ 23.99 Granted 177,627 20.27 Vested (281,905) 23.22 Forfeited (62,700) 23.25 Outstanding and unvested at December 31, 2019 717,681 23.43 Customers has a policy that permits its directors to elect to receive shares of common stock in lieu of their cash retainers. During the year ended December 31, 2019, Customers issued 37,467 shares of common stock with a fair value of $0.8 million to the directors as compensation for their services. The fair values were generally determined based on the closing price of the common stock the day before the shares were issued.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The components of income tax expense were as follows: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Current Federal $ 2,973 $ 4,509 $ 24,258 State 5,304 5,547 5,666 Total current expense 8,277 10,056 29,924 Deferred Federal 13,175 9,702 14,885 State 1,341 (399) 233 Total deferred expense 14,516 9,303 15,118 Income tax expense $ 22,793 $ 19,359 $ 45,042 Effective tax rates differ from the federal statutory rate of 21% at December 31, 2019 and December 31, 2018, and 35% at December 31, 2017, which was applied to income before income tax expense, due to the following: For the Years Ended December 31, 2019 2018 2017 (amounts in thousands) Amount % of pretax income Amount % of pretax income Amount % of pretax income Federal income tax at statutory rate $ 21,445 21.00 % $ 19,121 21.00 % $ 43,357 35.00 % State income tax, net of federal benefit 5,249 5.14 4,067 4.47 3,835 3.10 Tax-exempt interest, net of disallowance (385) (0.38) (360) (0.40) (381) (0.31) Bank-owned life insurance (1,677) (1.64) (1,547) (1.70) (2,675) (2.16) Tax credits (1,266) (1.24) (444) (0.49) — — Equity-based compensation 132 0.13 (547) (0.60) (10,741) (8.67) Non-deductible executive compensation 440 0.43 230 0.25 654 0.53 Unrecorded basis difference in foreign subsidiaries (144) (0.14) 343 0.38 4,527 3.65 Enactment of federal tax reform — — (21) (0.02) 5,505 4.44 Other (1,001) (0.98) (1,483) (1.63) 961 0.78 Effective income tax rate $ 22,793 22.32 % $ 19,359 21.26 % $ 45,042 36.36 % At December 31, 2019 and 2018, Customers had no ASC 740-10 unrecognized tax benefits. Customers does not expect the total amount of unrecognized tax benefits to significantly increase within the next twelve months. Customers recognizes interest and penalties on unrecognized tax benefits in other expense. Deferred income taxes reflect temporary differences in the recognition of revenue and expenses for tax reporting and financial statement purposes, principally because certain items are recognized in different periods for financial reporting and tax return purposes. The following represents Customers' deferred tax asset and liabilities as December 31, 2019 and 2018: December 31, (amounts in thousands) 2019 2018 Deferred tax assets Allowance for loan and lease losses $ 14,616 $ 10,449 Net unrealized losses on securities — 7,639 Net operating losses 1,494 1,212 Compensation and benefits 5,839 6,234 Cash flow hedge 5,557 324 Section 197 intangibles 1,196 923 Deferred income 1,182 640 Lease liability 5,523 — Other 1,307 2,766 Total gross deferred tax assets 36,714 30,187 Less: valuation allowance (486) — Net deferred tax assets 36,228 30,187 Deferred tax liabilities Fair value adjustments on acquisitions (506) (569) Bank premises and equipment (6,074) (884) Tax qualified lease adjustments (30,496) (17,786) Right of use asset (5,232) — Net unrealized gains on securities (5,020) — Other (640) (746) Total deferred tax liabilities (47,968) (19,985) Net deferred tax asset/(liability) $ (11,740) $ 10,202 The net deferred tax liability at December 31, 2019 is recorded in other liabilities and the net deferred tax asset at December 31, 2018 is recorded in other assets. Customers had approximately $4.8 million of federal and state net operating loss carryovers subject to the annual limitation under Internal Revenue code Section 382 at December 31, 2019, that begin to expire in 2027. Customers also has state net operating loss carryovers for some states that begin to expire in 2037. Customers believes it is more likely than not the benefit of these state net operating loss carryovers generated by BankMobile Technologies, Inc. will not be realized. As such, there is a valuation allowance on the deferred tax assets of the jurisdictions in which the net operating losses relate. Customers is subject to U.S. federal income tax as well as income tax in various state and local taxing jurisdictions. Generally, Customers is no longer subject to examination by federal, state, and local taxing authorities for years prior to the year ended December 31, 2016

Transactions with Executive Off

Transactions with Executive Officers, Directors, and Principal Shareholders	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Transactions with Executive Officers, Directors, and Principal Shareholders	TRANSACTIONS WITH EXECUTIVE OFFICERS, DIRECTORS AND PRINCIPAL SHAREHOLDERSCustomers has had, and may be expected to have in the future, banking transactions in the ordinary course of business with its executive officers, directors, principal shareholders, their immediate families and affiliated companies (commonly referred to as related parties). The activity relating to loans to such persons was as follows: For the Years Ended December 31, 2019 2018 2017 (amounts in thousands) Balance as of December 31, $ 5 $ — $ 238 Additions 47 27 99 Repayments (52) (22) (337) Balance as of December 31, $ — $ 5 $ — As of December 31, 2019 and 2018, Customers Bank had an outstanding commitment to a related party to provide a letter of credit in the amount of $0.5 million. Some current directors, nominees for director and executive officers of Customers and entities or organizations in which they were executive officers or the equivalent or owners of more than 10% of the equity, were customers of and had transactions with or involving Customers in the ordinary course of business during the fiscal year ended December 31, 2019. None of these transactions involved amounts in excess of 5% of Customers' gross revenues during 2019, nor was Customers indebted to any of the foregoing persons or entities in an aggregate amount in excess of 5% of Customers' total assets at December 31, 2019. Additional transactions with such persons and entities may be expected to take place in the ordinary course of business in the future. At December 31, 2019 and 2018, Customers had approximately $9.8 million and $15.3 million, respectively, in deposits from related parties, including directors and certain executive officers.

Financial Instruments with Off-

Financial Instruments with Off-Balance-Sheet Risk	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Financial Instruments with Off-Balance-Sheet Risk	FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK Customers is involved with financial instruments and other commitments with off-balance sheet risks. Financial instruments with off-balance sheet risks are incurred in the normal course of business to meet the financing needs of the Bank's customers. These financial instruments include commitments to extend credit, including unused portions of lines of credit, and standby letters of credit. Those instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized on the balance sheet. With commitments to extend credit, exposures to credit loss in the event of non-performance by the other party to the financial instrument is represented by the contractual amount of those instruments. The same credit policies are used in making commitments and conditional obligations as for on-balance sheet instruments. Because they involve credit risk similar to extending a loan and lease, commitments to extend credit are subject to the Bank’s credit policy and other underwriting standards. As of December 31, 2019 and 2018, the following off-balance sheet commitments, financial instruments and other arrangements were outstanding: December 31, (amounts in thousands) 2019 2018 Commitments to fund loans and leases $ 261,902 $ 345,608 Unfunded commitments to fund mortgage warehouse loans 1,378,364 1,537,900 Unfunded commitments under lines of credit and credit cards 1,065,474 867,131 Letters of credit 48,856 55,659 Other unused commitments 2,736 4,822 Commitments to fund loans and leases, unfunded commitments to fund mortgage warehouse loans, unfunded commitments under lines of credit, letters of credit, and credit cards are agreements to extend credit to or for the benefit of a customer in the ordinary course of the Bank's business. Commitments to fund loans and leases and unfunded commitments under lines of credit may be obligations of the Bank as long as there is no violation of any condition established in the contract. Because many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Bank evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if the Bank deems it necessary upon extension of credit, is based upon management’s credit evaluation. Collateral held varies but may include personal or commercial real estate, accounts receivable, inventory and equipment. Mortgage warehouse loan commitments are agreements to fund the pipelines of mortgage banking businesses from closing of individual mortgage loans until their sale into the secondary market. Most of the individual mortgage loans are insured or guaranteed by the U.S. government through one of its programs such as FHA, VA, or are conventional loans eligible for sale to Fannie Mae and Freddie Mac. These commitments generally fluctuate monthly based on changes in interest rates, refinance activity, new home sales and laws and regulation.

Regulatory Capital

Regulatory Capital	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [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 Bancorp must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items, as calculated under 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. 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 December 31, 2019 and 2018, 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 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 December 31, 2019 Common equity Tier 1 (to risk-weighted assets) Customers Bancorp, Inc. $ 821,810 7.984 % $ 463,211 4.500 % N/A N/A $ 720,551 7.000 % Customers Bank $ 1,164,652 11.323 % $ 462,842 4.500 % $ 668,549 6.500 % $ 719,976 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,039,281 10.096 % $ 617,615 6.000 % N/A N/A $ 874,955 8.500 % Customers Bank $ 1,164,652 11.323 % $ 617,122 6.000 % $ 822,829 8.000 % $ 874,256 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,256,309 12.205 % $ 823,487 8.000 % N/A N/A $ 1,080,827 10.500 % Customers Bank $ 1,330,155 12.933 % $ 822,829 8.000 % $ 1,028,537 10.000 % $ 1,079,964 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,039,281 9.258 % $ 449,026 4.000 % N/A N/A $ 449,026 4.000 % Customers Bank $ 1,164,652 10.379 % $ 448,851 4.000 % $ 561,064 5.000 % $ 448,851 4.000 % December 31, 2018 Common equity Tier 1 (to risk-weighted assets) Customers Bancorp, Inc. $ 745,795 8.964 % $ 374,388 4.500 % N/A N/A $ 530,384 6.375 % Customers Bank $ 1,066,121 12.822 % $ 374,160 4.500 % $ 540,453 6.500 % $ 530,059 6.375 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 963,266 11.578 % $ 499,185 6.000 % N/A N/A $ 655,180 7.875 % Customers Bank $ 1,066,121 12.822 % $ 498,879 6.000 % $ 665,173 8.000 % $ 654,779 7.875 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,081,962 13.005 % $ 655,580 8.000 % N/A N/A $ 821,575 9.875 % Customers Bank $ 1,215,522 14.619 % $ 665,173 8.000 % $ 831,466 10.000 % $ 821,072 9.875 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 963,266 9.665 % $ 398,668 4.000 % N/A N/A $ 398,668 4.000 % Customers Bank $ 1,066,121 10.699 % $ 398,570 4.000 % $ 498,212 5.000 % $ 398,570 4.000 % The Basel III risk-based capital rules adopted effective January 1, 2015, require that banks and holding companies maintain a "capital conservation buffer" of 250 basis points in excess of the "minimum capital ratio" or certain elective distributions would be limited. The minimum capital ratio is equal to the prompt corrective action adequately capitalized threshold ratio. The capital conservation buffer was phased in over four years beginning on January 1, 2016, with a maximum buffer of 0.625% of risk-weighted assets for 2016, 1.250% for 2017, 1.875% for 2018, and 2.500% for 2019 and thereafter. Effective January 1, 2019, the capital level required to avoid limitation on elective distributions applicable to the Bancorp and the Bank were as follows: (i) a common equity Tier 1 risk-based capital ratio of 7.000%; (ii) a Tier 1 risk-based capital ratio of 8.500% and (iii) a Total risk-based capital ratio of 10.500%.

Disclosures about Fair Value of

Disclosures about Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2019
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 Topic 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 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 , 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 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 December 31, 2019 and 2018: Financial Instruments Recorded at Fair Value on a Recurring Basis Investment securities: The fair values of equity securities, available for sale 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), and 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 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 Impaired loans: Impaired loans are those loans that are accounted for under ASC 310, Receivables , in which the Bank has measured impairment generally based on the fair value of the loan’s collateral or discounted cash flow analysis. Fair value is generally determined based upon independent third-party appraisals of the properties that collateralize the loans or discounted cash flows based upon the expected proceeds. 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 December 31, 2019 and 2018 were as follows: Carrying Amount Estimated Fair Value Fair Value Measurements at December 31, 2019 (amounts in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Cash and cash equivalents $ 212,505 $ 212,505 $ 212,505 $ — $ — Debt securities, available for sale 577,198 577,198 — 577,198 — Interest-only GNMA securities 16,272 16,272 — — 16,272 Equity securities 2,406 2,406 2,406 — — Loans held for sale 486,328 486,328 — 2,130 484,198 Total loans and leases receivable, net of allowance for loan and lease losses 9,508,367 9,853,037 — 2,245,758 7,607,279 FHLB, Federal Reserve Bank and other restricted stock 84,214 84,214 — 84,214 — Derivatives 23,608 23,608 — 23,529 79 Liabilities: Deposits $ 8,648,936 $ 8,652,340 $ 6,980,402 $ 1,671,938 $ — Federal funds purchased 538,000 538,000 538,000 — — FHLB advances 850,000 852,162 — 852,162 — Other borrowings 123,630 127,603 — 127,603 — Subordinated debt 181,115 192,217 — 192,217 — Derivatives 45,939 45,939 — 45,939 — Carrying Amount Estimated Fair Value Fair Value Measurements at December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (amounts in thousands) Assets: Cash and cash equivalents $ 62,135 $ 62,135 $ 62,135 $ — $ — Debt securities, available for sale 663,294 663,294 — 663,294 — Equity securities 1,718 1,718 1,718 — — Loans held for sale 1,507 1,507 — 1,507 — Total loans and leases receivable, net of allowance for loan and lease losses 8,503,522 8,481,128 — 1,405,420 7,075,708 FHLB, Federal Reserve Bank, and other restricted stock 89,685 89,685 — 89,685 — Derivatives 14,693 14,693 — 14,624 69 Liabilities: Deposits $ 7,142,236 $ 7,136,009 $ 5,408,055 $ 1,727,954 $ — Federal funds purchased 187,000 187,000 187,000 — — FHLB advances 1,248,070 1,248,046 998,070 249,976 — Other borrowings 123,871 121,718 — 121,718 — Subordinated debt 108,977 110,550 — 110,550 — Derivatives 16,286 16,286 — 16,286 — For financial assets and liabilities measured at fair value on a recurring and non-recurring basis, the fair value measurements by level within the fair value hierarchy used at December 31, 2019 and 2018 were as follows: December 31, 2019 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 securities: Agency-guaranteed residential mortgage-backed securities $ — $ 278,321 $ — $ 278,321 Corporate notes — 298,877 — 298,877 Interest-only GNMA securities — — 16,272 16,272 Equity securities 2,406 — — 2,406 Derivatives — 23,529 79 23,608 Loans held for sale – fair value option — 2,130 — 2,130 Loans receivable, mortgage warehouse – fair value option — 2,245,758 — 2,245,758 Total assets – recurring fair value measurements $ 2,406 $ 2,848,615 $ 16,351 $ 2,867,372 Liabilities Derivatives $ — $ 45,939 $ — $ 45,939 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of specific reserves of $852 $ — $ — $ 14,272 $ 14,272 Other real estate owned — — 78 78 Total assets – nonrecurring fair value measurements $ — $ — $ 14,350 $ 14,350 December 31, 2018 Fair Value Measurements at the End of the Reporting Period Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (amounts in thousands) Measured at Fair Value on a Recurring Basis: Assets Available for sale securities: Agency-guaranteed residential mortgage-backed securities $ — $ 305,374 $ — $ 305,374 Corporate notes — 357,920 — 357,920 Equity securities 1,718 — — 1,718 Derivatives — 14,624 69 14,693 Loans held for sale – fair value option — 1,507 — 1,507 Loans receivable, mortgage warehouse – fair value option — 1,405,420 — 1,405,420 Total assets - recurring fair value measurements $ 1,718 $ 2,084,845 $ 69 $ 2,086,632 Liabilities Derivatives $ — $ 16,286 $ — $ 16,286 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of specific reserves of $845 $ — $ — $ 10,876 $ 10,876 Other real estate owned — — 621 621 Total assets – nonrecurring fair value measurements $ — $ — $ 11,497 $ 11,497 The changes in residential mortgage loan commitments (Level 3 assets) measured at fair value on a recurring basis for the years ended December 31, 2019 and 2018 are summarized as follows in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 20 — DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments For the Years Ended December 31, (amounts in thousands) 2019 2018 Balance at December 31, $ 69 $ 60 Issuances 451 407 Settlements (441) (398) Balance at December 31, $ 79 $ 69 There were no transfers between levels during the years ended December 31, 2019 and 2018. The following table summarizes financial assets and financial liabilities measured at fair value as of December 31, 2019 and 2018 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. The interest-only GNMA securities are Level 3 assets measured at fair value on a recurring basis under a fair value option election. For the year ended December 31, 2019, Customers recorded an increase in fair value of $0.6 million on the interest-only GNMA securities in unrealized gains on investment securities in the consolidated statements of operations. For the year ended December 31, 2019, cash settlements of $1.5 million were applied to the carrying value of the interest-only GNMA securities, net of premium amortization expense. At December 31, 2019, Customers used an internally developed discounted cash flow model to value the interest-only GNMA securities. The significant unobservable input used in the discounted cash flow model included prepayment speed. Significant increases (decreases) in this input would result in a significantly lower (higher) fair value measurement. Quantitative Information about Level 3 Fair Value Measurements December 31, 2019 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (4) (dollars in thousands) Impaired loans – real estate $ 12,767 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 8% - 10% (8%) 34% - 45% (37%) Impaired loans – commercial & industrial 1,505 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 8% - 8% (8%) 8% - 50% (22%) Interest-only GNMA securities 16,272 Discounted cash flow Constant prepayment rate 9% - 14% (12%) Other real estate owned 78 Collateral appraisal (1) Liquidation expenses (2) 8% - 9% (9%) Residential mortgage loan commitments 79 Adjusted market bid Pull-through rate 85% - 85% (85%) (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 December 31, 2018 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (4) (dollars in thousands) Impaired loans – real estate $ 10,260 Collateral appraisal (1) Liquidation expenses (2) 8% - 8% (8%) Impaired loans – commercial & industrial 616 Business asset valuation (3) Business asset valuation adjustments (4) 8% - 50% (26%) Other real estate owned 621 Collateral appraisal (1) Liquidation expenses (2) 8% - 8% (8%) Residential mortgage loan commitments 69 Adjusted market bid Pull-through rate 90% - 90% (90%) (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	12 Months Ended
	Dec. 31, 2019
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. 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. Amounts reported in accumulated other comprehensive income (loss) related to derivatives will be reclassified to interest expense as interest payments are made on Customers’ variable-rate debt and a variable-rate deposit relationship. Customers expects to reclassify $6.2 million of losses from accumulated other comprehensive income (loss) to interest expense during the next 12 months. Customers is hedging its exposure to the variability in future cash flows for forecasted transactions (3-month FHLB advances) and a variable rate deposit relationship over a maximum period of 54 months (excluding forecasted transactions related to the payment of variable interest on existing financial instruments). At December 31, 2019, Customers had four outstanding interest rate derivatives with notional amounts totaling $725.0 million that were designated as cash flow hedges of interest-rate risk. At December 31, 2018, Customers had six outstanding interest rate derivatives with notional amounts totaling $750.0 million that were designated as cash flow hedges of interest-rate risk. The outstanding cash flow hedges expire between June 2021 and July 2024. 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 December 31, 2019, Customers had 140 interest rate swaps with an aggregate notional amount of $1.4 billion and four interest rate caps with an aggregate notional amount of $78.6 million related to this program. At December 31, 2018, Customers had 98 interest rate swaps with an aggregate notional amount of $1.0 billion related to this program. At December 31, 2018, there were no interest rate caps 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 December 31, 2019 and 2018, Customers had an outstanding notional balance of residential mortgage loan commitments of $4.5 million and $3.6 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 December 31, 2019 and 2018, Customers had outstanding notional balances of credit derivatives of $167.1 million and $94.9 million, respectively. Fair Value of Derivative Instruments on the Balance Sheet The following table presents the fair value of Customers’ derivative financial instruments as well as their presentation on the consolidated balance sheets at December 31, 2019 and 2018. December 31, 2019 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ — Other liabilities $ 21,374 Total $ — $ 21,374 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 23,301 Other liabilities $ 24,797 Interest rate caps Other assets 9 Other liabilities 9 Credit contracts Other assets 219 Other liabilities (241) Residential mortgage loan commitments Other assets 79 Other liabilities — Total $ 23,608 $ 24,565 December 31, 2018 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 $ 256 Other liabilities $ 1,502 Total $ 256 $ 1,502 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 14,300 Other liabilities $ 14,730 Credit contracts Other assets 68 Other liabilities 54 Residential mortgage loan commitments Other assets 69 Other liabilities — Total $ 14,437 $ 14,784 Effect of Derivative Instruments on Net Income The following table presents amounts included in the consolidated statements of income related to derivatives not designated as hedges for the years ended December 31, 2019, 2018 and 2017. Amount of Income Recognized in Earnings For the Years Ended December 31, (amounts in thousands) Income Statement Location 2019 2018 2017 Derivatives not designated as hedging instruments: Interest rate swaps (1) Other non-interest income $ 2,549 $ 3,409 $ 604 Interest rate caps Other non-interest income 24 — — Credit contracts Other non-interest income 589 127 171 Residential mortgage loan commitments Mortgage banking income 10 9 15 Total $ 3,172 $ 3,545 $ 790 (1) Includes income recognized from discontinued cash flow hedges for the year ended December 31, 2018. Effect of Derivative Instruments on Comprehensive Income The following table presents the effect of Customers' derivative financial instruments on comprehensive income for the years ended December 31, 2019, 2018 and 2017. For the Year Ended December 31, 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 (amounts in thousands) 2019 2018 2017 2019 2018 2017 Derivatives in cash flow hedging relationships: Interest rate swaps $ (15,656) $ 1,477 $ 406 Interest expense $ (1,407) $ 95 $ (2,634) Other non-interest income (2) — 2,822 — $ (1,407) $ 2,917 $ (2,634) (1) Amounts presented are net of taxes. See Note 4 - 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. (2) Includes income recognized from discontinued cash flow hedges. 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. 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 December 31, 2019, 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 $46.4 million. In addition, Customers, which has collateral posting thresholds with certain of these counterparties and at December 31, 2019 had posted $45.7 million of cash as collateral. Customers records cash posted as collateral 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 Not Offset in the Consolidated Balance Sheet (amounts in thousands) Gross Amounts Recognized on the Consolidated Balance Sheets Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2019 Interest rate derivative assets with institutional counterparties $ 432 $ — $ — $ 432 Interest rate derivative liabilities with institutional counterparties $ 45,727 $ — $ (45,727) $ — Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Gross Amounts Recognized on the Consolidated Balance Sheets Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2018 Interest rate derivative assets with institutional counterparties $ 7,529 $ — $ 1,860 $ 5,669 Interest rate derivative liabilities with institutional counterparties $ 9,077 $ — $ (702) $ 8,375

Loss Contingencies

Loss Contingencies	12 Months Ended
	Dec. 31, 2019
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. Halbreiner Matter On December 16, 2016, Elizabeth Halbreiner and Robert Halbreiner (“Plaintiffs”) filed a Second Amended Complaint captioned Elizabeth Halbreiner and Robert Halbreiner, v. Customers Bank, Robert B.White, Richard A. Ehst, Thomas Jastrem, Timothy D. Romig, Andrew Bowman, Michael Fuoco, Saldutti Law Group f/k/a Saldutti, LLC a/k/a Saldutti Law, LLC, Robert L. Saldutti, LLC, Robert L. Saldutti, Esquire, Brian J. Schaffer, Esquire, Robert Lieber, Jr., Esquire, Jay Sidhu, James Zardecki, Zardecki Associates LLC, No. 01419 in the First Judicial District of Pennsylvania, Court of Common Pleas of Philadelphia, Trial Division . In this Second Amended Complaint, the Plaintiffs generally alleged that Customers Bank, and the other named defendants, conspired to misuse the legal system for improper purposes and it also alleged defamation, false light, tortious interference with contractual relations, infliction of emotional distress, negligent infliction of emotional distress and loss of consortium . On January 6, 2017, Customers Bank filed Preliminary Objections to the Complaint seeking dismissal of the Plaintiffs' claims against Customers Bank and the employees of Customers Bank named as co-defendants. On April 6, 2017, the Court dismissed certain counts and determined to allow certain other counts to proceed. On December 12, 2019, Customers and the Plaintiffs entered into an agreement to settle the matter for $1.0 million and Customers paid the settlement amount, which had been accrued for in third quarter 2019. On December 17, 2019 the Plaintiffs filed an Order to Mark the Action Settled, Discontinued and Ended. Lifestyle Healthcare Group, Inc. Matter On January 9, 2017, Lifestyle Healthcare Group, Inc., et al (“Plaintiffs”) filed a Complaint captioned Lifestyle Healthcare Group, Inc.; Fred Rappaport; Victoria Rappaport; Lifestyle Management Group, LLC Trading as Lifestyle Real Estate I, LP; Lifestyle Real Estate I GP, LLC; Daniel Muck; Lifestyle Management Group, LLC; Lifestyle Management Group, LLC Trading as Lifestyle I, LP D/B/A Lifestyle Medspa, Plaintiffs v. Customers Bank, Robert White; Saldutti Law, LLC a/k/a Saldutti Law Group; Robert L. Saldutti, Esquire; and Michael Fuoco, Civil Action No. 01206, in the First Judicial District of Pennsylvania, Court of Common Pleas of Philadelphia . In this Complaint, which is related to the Halbreiner Matter described above, the Plaintiffs generally allege wrongful use of civil proceedings and abuse of process in connection with a case filed and later dismissed in federal court, titled, Customers Bank v. Fred Rappaport, et al., U.S.D.C.E.D. Pa., No. 15-6145. On January 30, 2017, Customers Bank filed Preliminary Objections to the Complaint seeking dismissal of Plaintiffs' claims against Customers Bank and Robert White, named as co-defendants. In response to the Preliminary Objections, Lifestyle filed an Amended Complaint against Customers Bank and Robert White. Customers Bank has filed Preliminary Objections to the Second Amended Complaint seeking dismissal of Plaintiffs' claim against Customers Bank and Robert White, named as co-defendants. The Court has dismissed certain counts and determined to allow certain other counts to proceed. Customers Bank intends to vigorously defend itself against these allegations but is currently unable to reasonably determine the likelihood of loss nor estimate a range of possible loss. United States Department of Education Matter In third quarter 2018, Customers received a FPRD letter dated September 5, 2018 from the DOE 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 DOE 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 DOE’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 part ner institutions. Customers disagrees with the FPRD and has elected to appeal the FPRD, including the asserted financial liabilities of $6.5 million, and a request for review has been submitted to trigger an administrative process before the DOE’s Office of Hearing and Appeals. Customers intends to vigorously defend itself against the financial liabilities established in the FPRD through that administrative appeals process and it further intends to pursue resolution of the FPRD’s prospective action requirements during the appeals resolution process. Based on preliminary discussions with the DOE and further analysis performed by Customers and certain partner institutions, Customers has estimated the range of possible loss to be $1.0 million to $3.0 million as of December 31, 2019. Customers recorded a liability in the amount of $1.0 million during third quarter 2019, as no amount within the range is more likely than any other amount in the range. Bureau of the Fiscal Service Notice of Direct Debit (U.S. Treasury Check Reclamation)

Condensed Financial Statements

Condensed Financial Statements of Parent Company	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Statements of Parent Company	CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY The following tables present the condensed financial statements for Customers Bancorp, Inc. (parent company only) as of December 31, 2019 and 2018, and for the years ended December 31, 2019, 2018 and 2017. Balance Sheets December 31, (amounts in thousands) 2019 2018 Assets Cash in subsidiary bank $ 62,643 $ 16,684 Investments in and receivables due from bank subsidiary 1,178,166 1,059,671 Investments in and receivables due from non-bank subsidiaries 2,406 1,718 Other assets 6,583 3,417 Total assets $ 1,249,798 $ 1,081,490 Liabilities and Shareholders' equity Borrowings $ 195,670 $ 123,871 Other liabilities 1,333 803 Total liabilities 197,003 124,674 Shareholders' equity 1,052,795 956,816 Total Liabilities and Shareholders' Equity $ 1,249,798 $ 1,081,490 Income and Comprehensive Income Statements For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Operating income: Other, including dividends from bank subsidiary $ 70,000 $ 45,422 $ 38,200 Total operating income 70,000 45,422 38,200 Operating expense: Interest 5,425 8,178 7,984 Other 744 1,722 1,742 Total operating expense 6,169 9,900 9,726 Income before taxes and undistributed income of subsidiaries 63,831 35,522 28,474 Income tax benefit 1,391 2,335 3,620 Income before undistributed income of subsidiaries 65,222 37,857 32,094 Equity in undistributed income of subsidiaries 14,105 33,838 46,743 Net income 79,327 71,695 78,837 Preferred stock dividends 14,459 14,459 14,459 Net income available to common shareholders 64,868 57,236 64,378 Comprehensive income $ 100,740 $ 50,730 $ 83,370 One of the principal sources of the Bancorp's liquidity is the dividends it receives from the Bank, which may be impacted by the following: bank-level capital needs, laws and regulations, corporate policies, contractual restrictions and other factors. There are statutory and regulatory limitations on the ability of the Bank to pay dividends or make other capital distributions or to extend credit to the Bancorp or its non-bank subsidiaries. Statements of Cash Flows For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Cash Flows from Operating Activities Net income $ 79,327 $ 71,695 $ 78,837 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Equity in undistributed earnings of subsidiaries, net of dividends received from Bank (14,105) (33,838) (46,743) (Increase) decrease in other assets (3,166) (256) 7,624 Increase (decrease) in other liabilities 1,775 (251) (1,322) Net Cash Provided By (Used in) Operating Activities 63,831 37,350 38,396 Cash Flows from Investing Activities Payments for investments in and advances to subsidiaries (74,767) (29) (98,725) Net Cash Used in Investing Activities (74,767) (29) (98,725) Cash Flows from Financing Activities Proceeds from issuance of common stock 2,150 3,585 2,716 Proceeds from issuance of subordinated long-term debt 72,030 — — Proceed from issuance of other long-term borrowings 24,477 — 98,564 Repayments of other borrowings (25,000) (63,250) — Exercise and redemption of warrants — 112 1,059 Purchase of treasury stock (571) (12,976) — Payments of employee taxes withheld from share-based awards (1,732) (880) (14,761) Preferred stock dividends paid (14,459) (14,459) (14,459) Net Cash Provided by (Used in) Financing Activities 56,895 (87,868) 73,119 Net Increase (Decrease) in Cash and Cash Equivalents 45,959 (50,547) 12,790 Cash and Cash Equivalents - Beginning 16,684 67,231 54,441 Cash and Cash Equivalents - Ending $ 62,643 $ 16,684 $ 67,231

Selected Quarterly Financial Da

Selected Quarterly Financial Data	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) The following table presents selected quarterly data for the years ended December 31, 2019 and 2018. 2019 Quarter Ended December 31 September 30 June 30 March 31 (amounts in thousands, except per share data) Interest income $ 123,995 $ 126,718 $ 111,950 $ 101,075 Interest expense 46,402 50,983 47,271 41,771 Net interest income 77,593 75,735 64,679 59,304 Provision for loan and lease losses 9,689 4,426 5,346 4,767 Non-interest income (1) 25,813 23,369 12,036 19,718 Non-interest expenses 58,740 59,592 59,582 53,984 Income before income taxes 34,977 35,086 11,787 20,271 Provision for income taxes 7,451 8,020 2,491 4,831 Net income 27,526 27,066 9,296 15,440 Preferred stock dividends 3,615 3,615 3,615 3,615 Net income available to common shareholders $ 23,911 $ 23,451 $ 5,681 $ 11,825 Earnings per common share: Basic earnings per common share $ 0.76 $ 0.75 $ 0.18 $ 0.38 Diluted earnings per common share $ 0.75 $ 0.74 $ 0.18 $ 0.38 (1) The quarter ended June 30, 2019 included a $7.5 million loss due to a shortfall in the fair value of interest-only GNMA securities acquired from a commercial mortgage warehouse customer. 2018 Quarter Ended December 31 September 30 June 30 March 31 (amounts in thousands, except per share data) Interest income $ 103,303 $ 110,045 $ 107,639 $ 96,964 Interest expense 41,779 46,044 40,317 31,933 Net interest income 61,524 64,001 67,322 65,031 Provision for loan and lease losses 1,385 2,924 (784) 2,117 Non-interest income (2) 19,877 2,084 16,127 20,910 Non-interest expenses 57,045 57,104 53,750 52,280 Income before income taxes 22,971 6,057 30,483 31,544 Provision for income taxes 5,109 28 6,820 7,402 Net income 17,862 6,029 23,663 24,142 Preferred stock dividends 3,615 3,615 3,615 3,615 Net income available to common shareholders $ 14,247 $ 2,414 $ 20,048 $ 20,527 Earnings per common share: Basic earnings per common share $ 0.45 $ 0.08 $ 0.64 $ 0.65 Diluted earnings per common share $ 0.44 $ 0.07 $ 0.62 $ 0.64 (2) The quarter ended September 30, 2018 included an $18.7 million loss on sale of investment securities.

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS Customers' segment financial reporting reflects the manner in which its chief operating decision makers allocate resources and assess performance. Management has determined that Customers' operations consist of two reportable segments - Customers Bank Business Banking and BankMobile. Each segment generates revenues, manages risk, and offers distinct products and services to targeted customers through different delivery channels. The strategy, marketing and analysis of these segments vary considerably. The Customers Bank Business Banking segment is delivered predominately to commercial customers in Southeastern Pennsylvania, New York, New Jersey, Massachusetts, Rhode Island, New Hampshire, Washington, D.C., and Illinois through a single-point-of-contact business model and provides liquidity to residential mortgage originators nationwide through commercial loans to mortgage companies. Lending and deposit gathering activities are focused primarily on privately held businesses, high-net-worth families, selected commercial real estate lending, commercial mortgage companies and equipment finance. Revenues are generated primarily through net interest income (the difference between interest earned on loans and leases, investments, and other interest earning assets and interest paid on deposits and other borrowed funds) and other non-interest income, such as mortgage warehouse transactional fees and BOLI. The BankMobile segment provides state-of-the-art high-tech digital banking and disbursement services to consumers, students, and the "under banked" nationwide, along with "Banking as a Service" offerings with white label partners. BankMobile is a full-service fintech banking platform that is accessible to customers anywhere and anytime through the customer's smartphone or other web-enabled device. Revenues are currently being generated primarily through interest income on other consumer loans, interchange and card revenue, deposit and wire transfer fees and university fees. The majority of expenses for BankMobile are related to the segment's operation of the ongoing business acquired through the Disbursement business acquisition and costs associated with the development of white label products for its partner. The following tables present the operating results for Customers' reportable business segments for the years ended December 31, 2019, 2018 and 2017. The segment financial results include directly attributable revenues and expenses. Consistent with the presentation of segment results to Customers' chief operating decision makers, overhead costs and preferred stock dividends are assigned to the Customers Bank Business Banking segment. The tax benefit assigned to BankMobile was based on an estimated effective tax rate of 22.55%, 24.56% and 37.67% for the years ended December 31, 2019, 2018 and 2017, respectively. For the Year Ended December 31, 2019 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Interest income (1) $ 422,094 $ 41,645 $ 463,739 Interest expense 185,513 916 186,429 Net interest income 236,581 40,729 277,310 Provision for loan and lease losses 10,091 14,136 24,227 Non-interest income 35,268 45,670 80,938 Non-interest expense 153,333 78,568 231,901 Income (loss) before income tax expense (benefit) 108,425 (6,305) 102,120 Income tax expense (benefit) 24,215 (1,422) 22,793 Net income (loss) 84,210 (4,883) 79,327 Preferred stock dividends 14,459 — 14,459 Net income (loss) available to common shareholders $ 69,751 $ (4,883) $ 64,868 As of December 31, 2019 Goodwill and other intangibles $ 3,629 $ 11,566 $ 15,195 Total assets (2) $ 10,990,550 $ 530,167 $ 11,520,717 Total deposits $ 8,247,836 $ 401,100 $ 8,648,936 Total non-deposit liabilities (2) $ 1,789,329 $ 29,657 $ 1,818,986 For the Year Ended December 31, 2018 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Interest income (1) $ 400,948 $ 17,003 $ 417,951 Interest expense 159,674 400 160,074 Net interest income 241,274 16,603 257,877 Provision for loan and lease losses 2,928 2,714 5,642 Non-interest income 17,499 41,499 58,998 Non-interest expense 146,946 73,233 220,179 Income (loss) before income tax expense (benefit) 108,899 (17,845) 91,054 Income tax expense (benefit) 23,742 (4,383) 19,359 Net income (loss) 85,157 (13,462) 71,695 Preferred stock dividends 14,459 — 14,459 Net income (loss) available to common shareholders $ 70,698 $ (13,462) $ 57,236 As of December 31, 2018 Goodwill and other intangibles $ 3,629 $ 12,870 $ 16,499 Total assets (2) $ 9,688,146 $ 145,279 $ 9,833,425 Total deposits $ 6,766,378 $ 375,858 $ 7,142,236 Total non-deposit liabilities (2) $ 1,719,225 $ 15,148 $ 1,734,373 (1) Amounts reported include funds transfer pricing of $8.8 million and $15.7 million for the years ended December 31, 2019 and 2018, respectively, credited to BankMobile for the value provided to the Customers Bank Business Banking segment for the use of excess low/no-cost deposits. (2) Amounts reported exclude inter-segment receivables/payables. For the Year Ended December 31, 2017 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Interest income (1) $ 359,931 $ 12,919 $ 372,850 Interest expense 105,438 69 105,507 Net interest income 254,493 12,850 267,343 Provision for loan and lease losses 5,638 1,130 6,768 Non-interest income 24,788 54,122 78,910 Non-interest expense 128,604 87,002 215,606 Income (loss) before income tax expense (benefit) 145,039 (21,160) 123,879 Income tax expense (benefit) 53,013 (7,971) 45,042 Net income (loss) 92,026 (13,189) 78,837 Preferred stock dividends 14,459 — 14,459 Net income (loss) available to common shareholders $ 77,567 $ (13,189) $ 64,378 As of December 31, 2017 Goodwill and other intangibles $ 3,630 $ 12,665 $ 16,295 Total assets (2) $ 9,769,996 $ 69,559 $ 9,839,555 Total deposits $ 6,400,310 $ 399,832 $ 6,800,142 Total non-deposit liabilities (2) $ 2,106,919 $ 11,530 $ 2,118,449 (1) Amounts reported include funds transfer pricing of $12.9 million for the year ended December 31, 2017, credited to BankMobile for the value provided to the Customers Bank Business Banking segment for the use of excess low/no-cost deposits. (2) Amounts reported exclude inter-segment receivables/payables.

Non-Interest Revenues

Non-Interest Revenues	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Non-Interest Revenues	NON-INTEREST REVENUES Customers' revenue from contracts with customers within the scope of ASC 606 is recognized within non-interest income. The following tables present Customers' non-interest revenues affected by ASC 606 by business segment for the years ended December 31, 2019, 2018, and 2017: For the Year Ended December 31, 2019 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and card revenue $ 781 $ 28,160 $ 28,941 Deposit fees 1,742 11,073 12,815 University fees - card and disbursement fees — 1,008 1,008 Total revenue recognized at point in time 2,523 40,241 42,764 Revenue recognized over time: University fees - subscription revenue — 3,956 3,956 Total revenue recognized over time — 3,956 3,956 Total revenue from contracts with customers $ 2,523 $ 44,197 $ 46,720

Significant Accounting Polici_2

Significant Accounting Policies and Basis of Presentation (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements have been prepared in conformity with U.S. GAAP and pursuant to the rules and regulations of the SEC. The accounting and reporting policies of Customers Bancorp and subsidiaries are in conformity with U.S. GAAP and predominant practices of the banking industry. The preparation of financial statements requires management to make estimates and assumptions that affect the reported balances of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The ALLL and the valuation of the interest-only GNMA securities are material estimates that are particularly susceptible to significant change in the near-term.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include the accounts of Customers Bancorp and its wholly owned subsidiaries, including Customers Bank, CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd., as well as Customers Bank's wholly owned subsidiaries, BankMobile Technologies, Inc., Customers Commercial Finance, LLC and Devon Service PA LLC. All intercompany balances and transactions have been eliminated in consolidation.
Cash and Cash Equivalents and Statements of Cash Flows	Cash and Cash Equivalents and Statements of Cash Flows Cash and cash equivalents include cash on hand, amounts due from banks and interest-bearing deposits with banks with a maturity date of three months or less and are recorded at cost. The carrying value of cash and cash equivalents is a reasonable estimate of its approximate fair value. Changes in the balances of cash and cash equivalents are reported on the consolidated statements of cash flows. Cash receipts from the repayment or sale of loans are classified within the statement of cash flows based on management's original intent upon origination of the loan, as prescribed by accounting guidance related to the statement of cash flows. Commercial mortgage warehouse loans are classified as held for investment and presented at "Loans receivable, mortgage warehouse, at fair value" on the consolidated balance sheets and the cash flow activities associated with these commercial mortgage warehouse lending activities are reported as investing activities on the consolidated statements of cash flows.
Restrictions on Cash and Amounts due from Banks	Restrictions on Cash and Amounts due from BanksThe Bank is required to maintain average balances at a certain level of cash and amounts on deposit with the Federal Reserve Bank.
Business Combinations	Business Combinations Business combinations are accounted for by applying the acquisition method in accordance with ASC 805, Business Combinations . Under the acquisition method, identifiable assets acquired and liabilities assumed are measured at their fair values as of the date of acquisition and are recognized separately from goodwill. The results of operations of the acquired entity are included in the consolidated statement of income from the date of acquisition. Customers recognizes goodwill when the acquisition price exceeds the estimated fair value of the net assets acquired.
Investment Securities	Investment Securities Customers acquires securities, largely agency-guaranteed mortgage-backed securities and corporate notes, to effectively utilize cash and capital and to generate earnings. Security transactions are recorded as of the trade date. Debt securities are classified at the time of acquisition as available for sale, HTM or trading, and their classification determines the accounting as follows: Available for sale : Investment securities classified as available for sale are those debt securities that Customers intends to hold for an indefinite period of time but not necessarily to maturity. Investment securities available for sale are carried at fair value. Unrealized gains or losses are reported as increases or decreases in AOCI, net of the related deferred tax effect. Realized gains or losses, determined on the basis of the cost of the specific securities sold, are included in earnings and recorded on the trade date. Premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Interest-only GNMA securities : On June 28, 2019, Customers obtained ownership of certain interest-only GNMA securities that served as the primary collateral for loans made to one commercial mortgage warehouse customer through a Uniform Commercial Code private sale transaction, as further described in NOTE 5 – INVESTMENT SECURITIES. Upon acquisition, Customers elected the fair value option for these interest-only GNMA securities, with changes in fair value reported as unrealized gain (loss) on investment securities within non-interest income. The fair value of these securities at December 31, 2019 was $16.3 million. Held to maturity : Investment securities classified as HTM are those debt securities that Customers has both the intent and ability to hold to maturity regardless of changes in market conditions, liquidity needs, or changes in general economic conditions. These securities are carried at cost, adjusted for the amortization of premiums and accretion of discounts, computed by a method which approximates the interest method over the terms of the securities. There were no securities classified as HTM as of December 31, 2019 and 2018. Equity securities: Equity securities are carried at their fair value, with changes in fair value reported in other non-interest income beginning in 2018. Equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments. For years ended December 31, 2017 and prior, equity securities were classified as available for sale and carried at fair value, with unrealized gains or losses reported as increases or decreases in AOCI, net of the related deferred tax effect. For available for sale and HTM debt securities, management periodically assesses whether the securities are OTTI. OTTI means that management believes a security’s decline in fair value below its amortized cost basis is due to factors that could include the issuer’s inability to pay interest or dividends, its potential for default and/or other factors. When a HTM or available for sale debt security is assessed for OTTI, management has to first consider (a) whether Customers intends to sell the security, and (b) whether it is more likely than not that Customers will be required to sell the security prior to recovery of its amortized cost basis. If one of these circumstances applies to a security, an OTTI loss is recognized in the consolidated statements of income equal to the full amount of the decline in fair value below the amortized cost basis. If neither of these circumstances applies to a security, but Customers does not expect to recover the entire amortized cost basis, an OTTI has occurred that must be separated into two categories for debt securities: (a) the amount related to a credit loss and (b) the amount related to other factors. In determining the amount of OTTI attributable to credit loss, management compares the present value of cash flows expected to be collected to the amortized cost basis of the security. The portion of the total OTTI attributed to a credit loss is recognized in earnings (as the difference between the fair value and the present value of the estimated cash flows expected to be collected), while the amount related to all other factors is recognized in AOCI. The total OTTI loss is presented in the statement of income, less the portion recognized in AOCI. When a debt security becomes other-than-temporarily impaired, its amortized cost basis is reduced to reflect the portion of the total impairment related to credit loss. On January 1, 2018, Customers adopted the new accounting standard for financial instruments, which requires equity securities to be measured at fair value, except those accounted for under the equity method of accounting, with changes in fair value recognized in earnings in the period in which they occur and will no longer be deferred in AOCI. The adoption of this guidance resulted in a $1.0 million increase to beginning retained earnings and a $1.0 million decrease to beginning AOCI.
Loan Accounting Framework	Loan Accounting Framewor k The accounting for a loan depends on management’s strategy for the loan and on whether the loan was credit impaired at the date of acquisition. The Bank accounts for loans based on the following categories: • Loans held for sale, • Loans at fair value, • Loans receivable and • Purchased loans. The discussion that follows describes the accounting for loans in these categories.
Loans Held for Sale and Loans at Fair Value	Loans Held for Sale and Loans at Fair Value Loans originated or purchased by Customers with the intent to sell them in the secondary market are carried either at the lower of cost or fair value, determined in the aggregate, or at fair value, depending upon an election made at the time the loan is originated or purchased. These loans are generally sold on a non-recourse basis with servicing released. Gains and losses on the sale of loans accounted for at the lower of cost or fair value are recognized in earnings based on the difference between the proceeds received and the carrying amount of the loans, inclusive of deferred origination fees and costs, if any. As a result of changes in events and circumstances or developments regarding management’s view of the foreseeable future, loans not originated or purchased with the intent to sell may subsequently be designated as held for sale. These loans are transferred to the held-for-sale portfolio at the lower of amortized cost or fair value. When the amortized cost of the loan exceeds its fair value at the date of transfer to the held-for-sale portfolio, the excess will be recognized as a charge against the ALLL to the extent the loan's reduction in fair value has already been provided for in the ALLL. Any subsequent lower of cost or fair value adjustments are recognized as a valuation allowance with charges recognized in non-interest income. Loans originated or purchased by Customers with the intent to sell them for which fair value accounting is elected are reported at fair value, with changes in fair value recognized in earnings in the period in which they occur. Upon sale, any difference between the proceeds received and the carrying amount of the loan is recognized in earnings. No fees or costs related to such loans are deferred, so they do not affect the gain or loss calculation at the time of sale. An ALLL is not maintained on loans designated as held for sale or reported at fair value.
Loans Receivable - Mortgage Warehouse, at Fair Value	Loans Receivable - Mortgage Warehouse, at Fair Value Certain mortgage warehouse lending transactions subject to master repurchase agreements are reported at fair value based on an election made to account for the loans at fair value. Pursuant to these agreements, Customers funds the pipelines for these mortgage lenders by sending payments directly to the closing agents for funded loans and receives proceeds directly from third party investors when the loans are sold into the secondary market. Commercial mortgage warehouse loans are classified as held for investment and presented as "Loans receivable, mortgage warehouse, at fair value" on the consolidated balance sheets. An ALLL is not maintained on loans reported at fair value.
Loans and Leases Receivable	Loans and Leases Receivable Loans and leases receivable that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding unpaid principal balances, net of an ALLL and any deferred fees. Interest income is accrued on the unpaid principal balance. Loan and lease origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment to the yield (interest income) of the related loans and leases using the level-yield method without anticipating prepayments. Customers is amortizing these amounts over the contractual life of the loans and leases.
Purchased Loans	Loans Customers believes that the varying circumstances under which it purchaes loans and the diverse credit quality of loans purchased should drive the decision as to whether loans in a portfolio should be deemed to be PCI loans. Therefore, loan purchases are evaluated on a case-by-case basis to determine the appropriate accounting treatment. Loans purchased that do not have evidence of credit deterioration at the purchase date are accounted for in accordance with ASC 310-10, and loans purchased with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected are accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. Loans that are purchased that do not have evidence of credit deterioration Purchased performing loans are initially recorded at fair value and include credit and interest rate marks associated with acquisition accounting adjustments. Purchase premiums or discounts are subsequently amortized or accreted as an adjustment to yield over the estimated contractual lives of the loans. There is no ALLL established at the purchase date for purchased performing loans. An ALLL is recorded for any credit deterioration in these loans subsequent to the purchase. Loans that are purchased that have evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected For these types of loan purchases, evidence of deteriorated credit quality may include past-due and non-accrual status, borrower credit scores and recent loan-to-value percentages. The fair value of loans with evidence of credit deterioration is recorded net of a nonaccretable difference and accretable yield. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is the nonaccretable difference that is not included in the carrying amount of acquired loans. Subsequent to acquisition, estimates of cash flows expected to be collected are updated each reporting period based on updated assumptions regarding default rates, loss severities and other factors that are reflective of current market conditions. Subsequent decreases in expected cash flows will generally result in a provision for loan losses. Subsequent increases in expected cash flows will result in a reversal of the provision for loan losses to the extent of prior charges or a reclassification of the difference from nonaccretable to accretable with a positive impact on accretion of interest income in future periods. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized in interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of those cash flows. PCI loans acquired in the same fiscal quarter may be aggregated into one or more pools, provided that the loans have similar risk characteristics. A pool is then accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. On a quarterly basis, Customers re-estimates the total cash flows (both principal and interest) expected to be collected over the remaining life of each pool. These estimates incorporate assumptions regarding default rates, loss severities, the amounts and timing of prepayments and other factors that reflect the then-current market conditions. If the timing and/or amounts of expected cash flows on PCI loans are determined not to be reasonably estimable, no interest is accreted, and the loans are reported as non-accrual loans; however, when the timing and amounts of expected cash flows for PCI loans are reasonably estimable, interest is accreted, and the loans are reported as performing loans.
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses The ALLL is Management's estimate of the probable losses inherent in the loan portfolio as of the balance sheet date and are recognized through provisions for loan and lease losses. Loans and leases deemed to be uncollectible are charged against the ALLL, and subsequent recoveries, if any, are credited to the ALLL. The ALLL is maintained at a level considered appropriate to absorb probable incurred loan and lease losses inherent in the loan and lease portfolio as of the reporting date. Customers segments its loan and lease portfolio into groups of loans with similar risk characteristics for purposes of estimating the ALLL. Customers' loan and lease groups include multi-family, commercial and industrial, owner and non-owner occupied commercial real estate, construction, residential real estate, manufactured housing, other consumer and PCI loans. SBA loans are further segmented. Customers also further segments its residential real estate portfolio into two classes based upon certain risk characteristics: first-mortgage loans and home equity loans and lines of credit. The remaining loan groups are also considered classes for purposes of monitoring and assessing credit quality based on certain risk characteristics. Additionally, within each loan group the acquired loans that are accounted for under ASC 310-10 are further segmented. The total ALLL consists of an allowance for impaired loans, a general allowance for losses and may also include residual non-specific reserve amounts. Management performs a quarterly assessment of the adequacy of the ALLL, which is based on Customers' past loan and lease loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan and lease portfolio, current economic conditions, peer and industry data and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. Customers' current methodology for determining the ALLL is based on historical loss rates, peer and industry data, current economic conditions, risk ratings, allowances on loans and leases identified as impaired and other qualitative adjustments as considered appropriate. The impaired-loan and lease component of the ALLL generally relates to loans and leases for which it is probable that Customers will be unable to collect all amounts due according to the contractual terms of the loan and lease agreements. Customers analyzes certain loans and leases in its portfolio for impairment in accordance with ASC 310-10-35. Customers' impaired loans and leases generally include loans and leases that have been (i) placed on non-accrual, (ii) restructured in a TDR, regardless of their payment status and (iii) charged-off to their net realizable value. For such loans and leases, an allowance is established when the (i) discounted cash flows, (ii) collateral value or (iii) the impaired loan or lease estimated fair value is lower than the carrying value of the loan or lease. The general component of the ALLL covers groups of loans and leases by loan and lease class, including commercial loans and leases not considered impaired, as well as smaller balance homogeneous loans, such as other consumer loans, residential real estate, home equity loans, and home equity lines of credit. These pools of loans and leases are evaluated for loss exposure based upon industry, peer or Customers' historical loss rates for each of these groups of loans and leases. After determining the appropriate historical loss rate for each group of loans and leases, management considers current qualitative or environmental factors that are likely to cause estimated credit losses as of the evaluation date to differ from the historical loss experience. The overall effect of these factors is recorded as an adjustment that, as appropriate, increases or decreases the historical loss rate applied to the loan group. The qualitative factors that management generally considers include the following: • National, regional and local economic and business conditions, including review of changes in the unemployment rate; • Volume and severity of past-due loans, non-accrual loans and classified loans; • Lending policies and procedures, including underwriting standards and historically based loss/collection, charge-off and recovery practices; • Nature and volume of the portfolio; • Existence and effect of any credit concentrations and changes in the level of such concentrations; • Risk ratings; • Changes in the values of collateral for collateral dependent loans; • Changes in the quality of the loan review system; • Experience, ability and depth of lending management and staff; and • Other external factors, such as changes in the legal, regulatory or competitive environment. A residual reserve may be maintained to cover uncertainties that could affect management’s estimate of probable losses. The residual reserve amount reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating credit losses in the loan and lease portfolio. The discussion that follows describes Customers' underwriting policies for its primary lending activities and its credit monitoring and charge-off practices. Commercial and industrial loans and leases are underwritten after evaluating historical and projected profitability and cash flow to determine the borrower’s ability to repay its obligation as agreed. Commercial and industrial loans and leases are made primarily based on the identified cash flow of the borrower and secondarily on the underlying collateral supporting the loan or lease facility. Accordingly, the repayment of a commercial and industrial loan or lease depends primarily on the creditworthiness of the borrower (and any guarantors), while liquidation of collateral is a secondary and often insufficient source of repayment. Construction loans are underwritten based upon a financial analysis of the developers and property owners and construction cost estimates, in addition to independent appraisal valuations. These loans rely on the value associated with the project upon completion. The cost and valuation amounts used are estimates and may be inaccurate. Construction loans generally involve the disbursement of substantial funds over a short period of time with repayment substantially dependent upon the success of the completed project. Sources of repayment of these loans would be permanent financing upon completion or sales of the developed property. These loans are closely monitored by on-site inspections and are considered to be of a higher risk than other real estate loans due to their ultimate repayment being sensitive to general economic conditions, availability of long-term financing, interest-rate sensitivity and governmental regulation of real property. Commercial real estate and multi-family loans are subject to the underwriting standards and processes similar to commercial and industrial loans, in addition to those underwriting standards for real estate loans. These loans are viewed primarily as cash flow dependent and secondarily as loans secured by real estate. Repayment of these loans is generally dependent upon the successful operation of the property securing the loan, or the principal business conducted on the property securing the loan, to generate sufficient cash flows to service the debt. In addition, the underwriting considers the amount of the principal advanced relative to the property value. Commercial real estate and multi-family loans may be adversely affected by conditions in the real estate markets or the economy in general. Management monitors and evaluates commercial real estate and multi-family loans based on cash flow estimates, collateral valuation and risk-rating criteria. Customers also utilizes third-party experts to provide environmental and market valuations. Substantial effort is required to underwrite, monitor and evaluate commercial real estate and multi-family loans. Residential real estate loans are secured by one-to-four dwelling units. This group is further divided into first mortgage and home equity loans. First mortgages are originated at a loan to value ratio of 80% or less. Home equity loans have additional risks as a result of typically being in a second position or lower in the event collateral is liquidated. Manufactured housing loans are loans that are secured by the manufactured housing unit where the borrower may or may not own the underlying real estate and therefore have a higher risk than a residential real estate loan. Other consumer loans consist primarily of unsecured loans to individuals which are originated through Customers' retail network or acquired through purchases from third parties, primarily market place lenders. None of the loans are sub-prime at the time of origination. Customers considers sub-prime borrowers to be those with FICO scores below 660. Consumer loans have a greater credit risk than residential loans because of the difference in the underlying collateral, if any. The application of various federal and state bankruptcy and insolvency laws may limit the amount that can be recovered on such loans. Delinquency status and other borrower characteristics are used to monitor loans and leases and identify credit risks, and the general reserves are established based on the expected incurred net charge-offs, adjusted for qualitative factors. Charge-offs on commercial and industrial, construction, multi-family and commercial real estate loans and leases are recorded when management estimates that there are insufficient cash flows to repay the contractual loan obligation based upon financial information available and valuation of the underlying collateral. Shortfalls in the underlying collateral value for loans or leases determined to be collateral dependent are charged-off immediately. Customers also takes into account the strength of any guarantees and the ability of the borrower to provide value related to those guarantees in determining the ultimate charge-off or allowance associated with an impaired loan or lease. Accordingly, Customers may charge-off a loan or lease to a value below the net appraised value if it believes that an expeditious liquidation is desirable under the circumstance, and it has legitimate offers or other indications of interest to support a value that is less than the net appraised value. Alternatively, Customers may carry a loan or lease at a value that is in excess of the appraised value in certain circumstances, such as when Customers has a guarantee from a borrower that Customers believes has realizable value. In evaluating the strength of any guarantee, Customers evaluates the financial wherewithal of the guarantor, the guarantor’s reputation and the guarantor’s willingness and desire to work with Customers. Customers then conducts a review of the strength of the guarantee on a frequency established as the circumstances and conditions of the borrower warrant. Customers records charge-offs for residential real estate, other consumer and manufactured housing loans after 120 days of delinquency or sooner when cash flows are determined to be insufficient for repayment. Customers may also charge-off these loans below the net appraised valuation if Customers holds a junior-mortgage position in a piece of collateral whereby the risk to acquiring control of the property through the purchase of the senior-mortgage position is deemed to potentially increase the risk of loss upon liquidation due to the amount of time to ultimately sell the property and the volatile market conditions. In such cases, Customers may abandon its junior mortgage and charge-off the loan balance in full. Credit Quality Factors Commercial and industrial, multi-family, commercial real estate and construction loans and leases are each assigned a numerical rating of risk based on an internal risk-rating system. The risk rating is assigned at loan origination and indicates management's estimate of credit quality. Risk ratings are reviewed on a periodic or “as needed” basis. Residential real estate, manufactured housing and other consumer loans are evaluated primarily based on payment activity of the loan. Risk ratings are not established for residential real estate, home equity loans, manufactured housing loans, and other consumer 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 on aggregate payment history (through the monitoring of delinquency levels and trends). For additional information about credit quality risk ratings refer to NOTE 7 – LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR LOAN AND LEASE LOSSES. Impaired Loans and Leases A loan or lease is generally considered impaired when, based on current information and events, it is probable that Customers will be unable to collect all amounts due according to the contractual terms of the loan or lease agreement. Customers' impaired loans and leases generally include loans and leases that have been (i) placed on non-accrual, (ii) restructured in a TDR, regardless of their payment status and (iii) charged-off to their net realizable value. Factors considered by management in determining impairment include payment status, collateral value and the probability of collecting scheduled principal and interest payments when due. Loans and leases that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan or lease and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is generally measured on a loan-by-loan basis for commercial and construction loans by the present value of expected future cash flows discounted at the loan’s original effective interest rate, the loan’s obtainable market price or the fair value of the collateral if the loan is collateral dependent. The fair value of the collateral is measured based on the value of the collateral securing the loans, less estimated costs to liquidate the collateral. Collateral may be in the form of real estate or business assets including equipment, inventory and accounts receivable. The vast majority of Customers' collateral is real estate. The value of real estate collateral is determined utilizing an income or market valuation approach based on an appraisal conducted by an independent, third-party licensed appraiser using comparable market data. The value of business equipment is based upon an outside appraisal if deemed significant or the net book value on the applicable business’ financial statements if not considered significant, using comparable market data. Similarly, values for inventory and accounts receivable collateral are based on financial statement balances or aging reports.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the identifiable net assets of businesses acquired through business combinations accounted for under the acquisition method. Other intangible assets represent purchased assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights. Intangible assets that have finite lives, such as customer and university relationships and non-compete agreements, are amortized over their estimated useful lives and are subject to impairment testing. Goodwill and indefinite-lived intangible assets are reviewed for impairment annually as of October 31 and between annual tests when events and circumstances indicate that impairment may have occurred. If there is a goodwill impairment charge, it will be the amount by which the reporting unit's carrying amount exceeds its fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The same annual impairment test is applied to goodwill at all reporting units. Customers applies a qualitative assessment for its reporting units to determine if the one-step quantitative impairment test is necessary. Intangible assets subject to amortization are reviewed for impairment under ASC 360 which requires that a long-lived asset or asset group be tested for recoverability whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The carrying value of a long-lived asset is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset.
FHLB, Federal Reserve Bank, and other restricted stock	FHLB, Federal Reserve Bank and other restricted stockFHLB, Federal Reserve Bank and other restricted stock represents required investment in the capital stock of the FHLB, the Federal Reserve Bank and Atlantic Community Bankers Bank and is carried at cost.
Other Real Estate Owned	Other Real Estate Owned Real estate properties acquired through, or in lieu of, loan foreclosure are initially recorded at fair value less estimated costs to sell at the date of foreclosure, establishing a new cost basis. After foreclosure, valuations are periodically performed by third-party appraisers, and the real estate is carried at the lower of its carrying amount or fair value less estimated costs to sell. Any declines in the fair value of the real estate properties below the initial cost basis are recorded through a valuation allowance. Increases in the fair value of the real estate properties net of estimated selling costs will reverse the valuation allowance but only up to the costs basis which was established at the initial measurement date. Revenue and expenses from operations and changes in the valuation allowance are included in earnings.
Bank-Owned Life Insurance	Bank-Owned Life Insurance BOLI policies insure the lives of officers of Customers and name Customers as beneficiary. Non-interest income is generated tax free (subject to certain limitations) from the increase in value of the policies’ underlying investments made by the insurance company. Cash proceeds received from the settlement of the BOLI policies are tax-free and can be used to partially offset costs associated with employee compensation and benefit programs.
Bank Premises and Equipment	Bank Premises and Equipment Bank premises and equipment are recorded at cost less accumulated depreciation and amortization. Depreciation and amortization is computed on the straight-line method over the estimated useful lives of the related assets. Leasehold improvements are amortized over the shorter of the term of the lease or estimated useful life, unless extension of the lease term is reasonably assured.
Lessor Operating Leases	Lessor Operating Leases Leased assets under operating leases are carried at amortized cost net of accumulated depreciation and any impairment charges. The depreciation expense of the leased assets is recognized on a straight-line basis over the contractual term of the leases up to their 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 other non-interest income on a straight-line basis over the lease term. Customers periodically reviews its leased assets for impairment. An impairment loss is recognized if the carrying amount of the leased asset exceeds its fair value and is not recoverable. The carrying amount of 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 leased asset.
Treasury Stock	Treasury Stock Common stock purchased for treasury is recorded at cost.
Income Taxes	Income Taxes Customers accounts for income taxes under the liability method of accounting for income taxes. The income tax accounting guidance results in two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. Customers determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. A tax position is recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the term upon examination includes resolution of the related appeals or litigation process. A tax position that meets the more-likely-than-not recognition threshold is measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances and information available at the reporting date and is subject to management’s judgment. In assessing the realizability of federal or state deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and prudent, feasible and permissible as well as available tax planning strategies in making this assessment. See NOTE 15 - INCOME TAXES for additional information.
Share-Based Compensation	Share-Based Compensation Customers has four share-based compensation plans. Share-based-compensation accounting guidance requires that the compensation cost relating to share-based-payment transactions be recognized in earnings. The cost is measured based on the grant-date fair value of the equity instruments issued. The Black-Scholes model is used to estimate the fair value of stock options, while the closing market price of Customers’ common stock on the date of grant is used for restricted stock awards. Compensation cost for all share-based awards is calculated and recognized over the team member's service period, defined as the vesting period. For performance-based awards, compensation cost is recognized over the vesting period as long as it remains probable that the performance conditions will be met. If the service or performance conditions are not met, Customers reverses previously recorded compensation expense upon forfeiture. Customers' accounting policy election is to recognize forfeitures as they occur. In 2014, the shareholders of Customers Bancorp approved an ESPP. Because the purchase price under the plan is 85% (a 15% discount to the market price) of the fair market value of a share of common stock on the first day of each quarterly subscription period, the plan is considered to be a compensatory plan under current accounting guidance. Therefore, the entire amount of the discount is recognizable compensation expense. See NOTE 14 - SHARE-BASED COMPENSATION for additional information.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets, including loan participations sold, are accounted for as sales when control over the assets has been surrendered (settlement date). Control over transferred assets is generally considered to have been surrendered when (i) the assets have been isolated from Customers, (ii) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (iii) Customers does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. If the sale criteria are met, the transferred financial assets are removed from Customers' balance sheet, and a gain or loss on sale is recognized. If the sale criteria are not met, the transfer is recorded as a secured borrowing with the assets remaining on Customers' balance sheet, and the proceeds received from the transaction recognized as a liability.
Segment Information	Segment Information Customers' chief operating decision makers allocate resources and assess performance for two distinct business segments, "Customers Bank Business Banking" and "BankMobile." The Customers Bank Business Banking segment is delivered predominately to commercial customers in Southeastern Pennsylvania, New York, New Jersey, Massachusetts, Rhode Island, New Hampshire, Washington, D.C., and Illinois through a single point of contact business model and provides liquidity to residential mortgage originators nationwide through commercial loans to mortgage companies. The BankMobile segment provides state-of-the-art high-tech digital banking and disbursement services to consumers, students and the "under banked" nationwide, along with "Banking as a Service" offerings with existing and potential white label partners. BankMobile, as a division of Customers Bank, is a full service bank that is accessible to customers anywhere and anytime through the customer's smartphone or other web-enabled device. Additional information regarding reportable segments can be found in NOTE 24 - BUSINESS SEGMENTS.
Derivative Instruments and Hedging	Derivative Instruments and Hedging ASC 815, Derivatives and Hedging , provides the disclosure requirements for derivatives and hedging activities with the intent to provide users of financial statements with an enhanced understanding of: (i) how and why an entity uses derivative instruments, (ii) how the entity accounts for derivative instruments and the related hedged items and (c) how derivative instruments and the related hedged items affect an entity’s financial position, financial performance and cash flows. Further, qualitative disclosures are required that explain the objectives and strategies for using derivatives, as well as quantitative disclosures about the fair value and gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative instruments. As required by ASC 815, Customers records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether Customers has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as hedges of the exposure to changes in the fair value of an asset, liability or firm commitment attributable to a particular risk, such as interest-rate risk, are considered fair value hedges. Derivatives designated and qualifying as hedges of the exposure to variability in expected future cash flows or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. Customers may enter into derivative contracts that are intended to economically hedge certain of its risks; even though hedge accounting does not apply, or Customers elects not to apply hedge accounting. Beginning in March 2014, Customers entered into pay-fixed interest-rate swaps to hedge the variable cash flows associated with the forecasted issuance of debt and a certain variable rate deposit relationship. Customers documented and designated these interest-rate swaps as cash flow hedges. The effective portion of changes in the fair value of financial derivatives designated and qualifying as cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period in which the hedged forecasted transaction affects earnings. The ineffective portion of the change in fair value of the financial derivatives is also recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period in which the hedged forecasted transaction affects earnings. Amounts reported in accumulated other comprehensive income (loss) related to financial derivatives will be reclassified to interest expense as interest payments are made on Customers' variable-rate debt. As of December 31, 2019, Customers had four financial derivatives designated in qualifying cash flow hedge relationships with a notional aggregate balance of $725.0 million. As of December 31, 2018, Customers had six financial derivatives designated in qualifying cash flow hedge relationships with a notional aggregate balance of $750.0 million. 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 were not designated in hedge relationships for accounting purposes and are being recorded at their fair value, with fair value changes recorded directly in earnings. At December 31, 2019 and 2018, Customers had an outstanding notional balance of credit derivatives of $167.1 million and $94.9 million, respectively. In accordance with the FASB’s fair value measurement guidance, Customers made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio. See NOTE 20 - DERIVATIVE INSTRUMENTS for additional information. 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.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Comprehensive income (loss) consists of net income (loss) and other comprehensive income (loss). Other comprehensive income (loss) includes changes in unrealized gains and losses on debt securities available for sale arising during the period and reclassification adjustments for realized gains and losses on debt securities available for sale included in net income. Other comprehensive income (loss) also includes the effective and ineffective portion of changes in fair value of financial derivatives designated and qualifying as cash flow hedges. Cash flow hedge amounts classified as comprehensive income are subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings.
Earnings per Share	Earnings per Share Basic EPS represents net income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted EPS includes all potentially dilutive common shares outstanding during the period. Potential common shares that may be issued related to outstanding stock options, restricted stock units and warrants are determined using the treasury stock method. The treasury stock method assumes that the proceeds received for common shares
Loss Contingencies	Loss Contingencies Loss contingencies, including claims and legal, regulatory and governmental actions and proceedings arise in the ordinary course of business. In accordance with applicable accounting guidance, Customers establishes an accrued liability when those matters present loss contingencies that are both probable and estimable. In such cases, there may be an exposure to loss in excess of any amounts accrued. As facts and circumstances evolve, Customers, in conjunction with any outside counsel handling the matter, evaluates on an ongoing basis whether such matter presents a loss contingency that is probable and estimable. Once the loss contingency is deemed to be both probable and estimable, Customers will establish an accrued liability and record a corresponding amount of litigation-related expense. Customers continues to monitor the matter for further developments that could affect the amount of the accrued liability that has been previously established.
Collaborative Arrangements	Collaborative Arrangements In the normal course of business, Customers may enter into collaborative arrangements primarily to develop and commercialize banking products to its partners' customers. Collaborative arrangements are contractual agreements with third parties that involve a joint operating activity where both Customers and the collaborating partner are active participants in the activity and are exposed to the significant risks and rewards of the activity. Collaborative activities typically include research and development, technology, product development, marketing, and day-to-day operations of the banking product. These arrangements often require the sharing of revenue and expense. Net interest income, non-interest income, and non-interest expenses incurred pursuant to these arrangements are reported net of any payments due to or amounts due from Customers' collaboration partners. Reimbursement of non-interest expenses are reported in other non-interest expense and are recognized at the time the collaborative party becomes obligated to pay.
Recently Issued Accounting Standards and Updates	Recently Issued Accounting Standards Accounting Standards Adopted in 2019 During 2019, Customers has adopted the following FASB ASUs, none of which had a material impact to Customers’ consolidated financial statements: Standard Summary of guidance Effects on Financial Statements ASU 2016-02, Leases Issued February 2016 • Supersedes the lease accounting guidance for both lessees and lessors under ASC 840, Leases. • From the lessee's perspective, the new standard establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. • Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement for lessees. • This ASU requires lessors to account for leases using an approach that is substantially similar to the existing guidance for sales-type, direct financing leases and operating leases. • Effective January 1, 2019. • In July 2018, the FASB issued ASU 2018-11 “Leases (Topic 842): Targeted Improvements,” which provides lessees the option to apply the new leasing standard to all open leases as of the adoption date. Prior to this ASU issuance, a modified retrospective transition approach was required. • In December 2018, the FASB issued ASU 2018-20 "Leases (Topic 842): Narrow-Scope Improvements for Lessors," which provides lessors a policy election to not evaluate whether certain sales taxes and other similar taxes are lessor costs or lessee costs. Additionally, the update requires certain lessors to exclude from variable payments lessor costs paid by lessees directly to third parties. • In March 2019, the FASB issued ASU 2019-01 "Codification Improvements," which clarifies that lessors who are not manufacturers or dealers should use the original cost of the underlying asset in a lease as its fair value. Additionally, the update states that lessors who are depository or lending institutions within the scope of ASC 942 should present all principal payments received under leases under investing activities in their Statement of Cash Flows and that interim disclosures under ASC 250-10-50-3 are not required in the interim reports of issuers adopting ASC 842. • Customers adopted on January 1, 2019. • The adoption did not materially change Customers' recognition of operating lease expense in its consolidated statements of income. • Customers adopted certain practical expedients available under the new guidance, which did not require it to (1) reassess whether any expired or existing contracts contain leases, (2) reassess the lease classification for any expired or existing leases, (3) reassess initial direct costs for any existing leases, (4) separate non-lease components from the associated lease components, (5) evaluate whether certain sales taxes and other similar taxes are lessor costs, and (6) capitalize short-term leases. Additionally, Customers elected to apply the new lease guidance at the adoption date, rather than at the beginning of the earliest period presented and will continue to present comparative periods prior to January 1, 2019 under Topic 840. Customers did not adopt the hindsight practical expedient. • The adoption of the ASU for Customers' lessor equipment finance business did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. • See NOTE 8 - LEASES. ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities Issued March 2017 • Requires that premiums for certain callable debt securities held be amortized to their earliest call date. • Effective on January 1, 2019. • Adoption of this new guidance must be applied on a modified retrospective approach. • Customers adopted on January 1, 2019. • The adoption did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. Accounting Standards Adopted in 2019 (continued) Standard Summary of guidance Effects on Financial Statements ASU 2017-11, Accounting for Certain Financial Instruments with Down Round Features Issued July 2017 • Changes the classification analysis of certain equity-linked financial instruments (or embedded features) with down round features. • When determining whether certain financial instruments should be classified as liabilities or equity instruments, a down round feature no longer precludes equity classification when assessing whether the instrument is indexed to an entity's own stock. As a result, a freestanding equity-linked financial instrument (or embedded conversion option) would no longer be accounted for as a derivative liability at fair value as a result of the existence of a down round feature. • For freestanding equity-classified financial instruments, the amendments require entities to recognize the effect of the down round feature when it is triggered. That effect is treated as a dividend and as a reduction of net income available to common shareholders in basic EPS. • Effective January 1, 2019. • Customers adopted on January 1, 2019. • The adoption did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-employee Share-Based Payment Accounting Issued June 2018 • Expands the scope of Topic 718, Compensation - Stock Compensation, which currently only includes share-based payments issued to employees, to also include share-based payments issued to non-employees for goods and services. • Applies to all share-based payment transactions in which a grantor acquires goods or services from non-employees to be used or consumed in a grantor's own operations by issuing share-based payment awards. • With the amended guidance from ASU 2018-07, non-employees share-based payments are measured with an estimate of the fair value of the equity the business is obligated to issue at the grant date (the date that the business and the stock award recipient agree to the terms of the award). • Compensation would be recognized in the same period and in the same manner as if the entity had paid cash for goods or services instead of stock. • Effective January 1, 2019. • Customers adopted on January 1, 2019. • The adoption did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. Accounting Standards Adopted on January 1, 2020 Standard Summary of guidance Effects on Financial Statements ASU 2019-04, • Clarifies the scope of the credit losses standard and addresses issues related to accrued interest receivable balances, recoveries, variable interest rates, and prepayments. • Addresses partial-term fair value hedges, fair value hedge basis adjustments and certain transition requirements. • Addresses recognizing and measuring financial instruments, specifically the requirement for remeasurement under ASC 820 when using the measurement alternative, certain disclosure requirements and which equity securities have to be remeasured at historical exchange rates. • Topic 326 Amendments - Effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption permitted. Topic 815 Amendments - Effective for first annual period beginning after the issuance date of this ASU (i.e., fiscal year 2020). Entities that have already adopted the amendments in ASU 2017-12 may elect either to retrospectively apply all the amendments or to prospectively apply all amendments as of the date of adoption. Topic 825 Amendments - Effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. • Customers adopted on January 1, 2020. • The adoption of this guidance relating to Topics 815 and 825 did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. Please refer to ASU 2016-13 for further discussion on Customers' adoption of ASU 2016-13 (Topic 326). ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction Between Topic 808 and Topic 606 Issued November 2018 • Clarifies that certain transactions between collaborative arrangement participants should be accounted for as revenue under Topic 606 when the collaborative arrangement participant is a customer in the context of a unit of account. In those situations, all the guidance in Topic 606 should be applied, including recognition, measurement, presentation, and disclosure requirements. • Adds unit-of-account guidance in Topic 808 to align with the guidance in Topic 606 when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within scope of Topic 606. • Requires that in a transaction with a collaborative arrangement participant that is not directly related to sales to third parties, presenting the transaction together with revenue recognized under Topic 606 is precluded if the collaborative arrangement participant is not a customer. • Effective for fiscal year beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption permitted. • Customers adopted on January 1, 2020. • The adoption of this guidance did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. Accounting Standards Adopted on January 1, 2020 (continued) Standard Summary of guidance Effects on Financial Statements ASU 2018-15, Internal-Use Software (Subtopic 350-40): Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract Issued August 2018 • Clarifies that service contracts with hosting arrangements must follow internal-use software guidance Subtopic 350-40 when determining which implementation costs to capitalize as an asset related to the service contract and which costs to expense. • Also clarifies that capitalized implementation costs of a hosting arrangement that is a service contract are to be amortized over the term of the hosting arrangement, which includes the noncancelable period of the arrangement plus options to extend the arrangement if reasonably certain to exercise. • Clarifies that existing impairment guidance in Subtopic 350-40 must be applied to the capitalized implementation costs as if they were long-lived assets. • Applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. • Effective for fiscal year beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption permitted. • Customers adopted on January 1, 2020. • The adoption of this guidance did not have a material impact on Customers' financial condition, results of operations and consolidated financial statements. ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments Issued June 2016 Ÿ Requires an entity to utilize a new impairment model known as the current expected credit loss model to estimate lifetime expected credit loss and record an allowance that, when deducted from the amortized cost basis of the financial asset (including HTM securities), presents the net amount expected to be collected on the financial asset. Ÿ Replaces today's "incurred loss" approach and is expected to result in earlier recognition of credit losses. Ÿ For available for sale debt securities, entities will be required to record allowances for credit losses rather than reduce the carrying amount, as they do today under the OTTI model, and will be allowed to reverse previously established allowances in the event the credit of the issuer improves. Ÿ Simplifies the accounting model for PCI debt securities and loans. Ÿ In May 2019, the FASB issued ASU 2019-05 "Financial Instruments - Credit Losses (Topic 326): Targeted Transition Relief," which provides entities that have certain instruments within the scope of Topic 326 with an option to irrevocably elect the fair value option in Subtopic 825, Financial Instruments. This relief is to be applied on an instrument-by-instrument basis for eligible instruments upon adoption of Topic 326. Ÿ Effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years, with early adoption permitted. Ÿ Adoption to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. Ÿ Customers will adopt on January 1, 2020. Ÿ Customers has established a company-wide, cross-discipline governance structure, which provides implementation oversight and continues evaluating the impact of this ASU and reviewing the loss modeling requirements consistent with expected credit loss estimates. Ÿ Customers utilizes a third-party vendor to assist in the implementation process of its new model. Ÿ Customers utilizes lifetime loss rate models for its commercial real estate, commercial and industrial, and consumer portfolios. As Customers' loan portfolios have not been subject to a full economic credit cycle, expected lifetime loss rates for its commercial loan portfolios are calibrated based on its peer groups' historical loss rates. Expected lifetime loss rates for Customers' consumer loan portfolio is based on industry data, as the majority of the portfolio has been purchased from third-parties and originated nationwide. Additionally, the expected loss rates include reasonable and supportable forecasts of macroeconomic conditions. Ÿ Implementation efforts are continuing to focus on model validation, model calibration, qualitative factors, developing new disclosures, finalizing formal policies and procedures and other governance and control enhancements and documentation. Ÿ Customers continues to analyze and modify the calculations. Based on the work to date, Customers does expect a significant increase in the ALLL upon adoption. For regulatory capital purposes, Customers will phase in the CECL adjustment over a 3-year period.
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 Topic 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 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 , 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 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.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Components of Earnings Per Share	The following are the components and results of Customers' earnings per common share calculations for the periods presented. For the Years Ended December 31, 2019 2018 2017 (amounts in thousands, except share and per share data) Net income available to common shareholders $ 64,868 $ 57,236 $ 64,378 Weighted-average number of common shares outstanding – basic 31,183,841 31,570,118 30,659,320 Share-based compensation plans 462,375 658,739 1,917,451 Warrants — 4,241 19,906 Weighted-average number of common shares – diluted 31,646,216 32,233,098 32,596,677 Basic earnings per common share $ 2.08 $ 1.81 $ 2.10 Diluted earnings per common share $ 2.05 $ 1.78 $ 1.97
Anti-dilutive Securities Excluded from Computation of Earnings Per Share	The following is a summary of 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. For the Years Ended December 31, 2019 2018 2017 Anti-dilutive securities: Share-based compensation awards 2,172,157 1,138,251 1,059,225

Changes In Accumulated Other _2

Changes In Accumulated Other Comprehensive Income (Loss) By Component (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2019 and 2018. Amounts in parentheses indicate reductions to accumulated other comprehensive income (loss). Available for Sale Securities (amounts in thousands) Unrealized Gains (Losses) Foreign Currency Items Total Unrealized Gains (Losses) (2) Unrealized Gains (Losses) on Cash Flow Hedges (3) Total Balance, December 31, 2017 $ (249) $ 88 $ (161) $ (198) $ (359) Reclassification of the income tax effects of the Tax Cuts and Jobs Act (1) (256) — (256) (42) (298) Reclassification of the net unrealized gains on equity securities (1) (953) (88) (1,041) — (1,041) Balance after reclassification adjustments on January 1, 2018 (1,458) — (1,458) (240) (1,698) Current period: Unrealized gains (losses) arising during period, before tax (46,069) — (46,069) 1,995 (44,074) Income tax effect 11,978 — 11,978 (518) 11,460 Other comprehensive income (loss) before reclassifications (34,091) — (34,091) 1,477 (32,614) Reclassification adjustments for losses (gains) included in net income, before tax 18,659 — 18,659 (2,917) 15,742 Income tax effect (4,851) — (4,851) 758 (4,093) Amounts reclassified from accumulated other comprehensive income (loss) to net income 13,808 — 13,808 (2,159) 11,649 Net current-period other comprehensive income (loss) (20,283) — (20,283) (682) (20,965) Balance, December 31, 2018 (21,741) — (21,741) (922) (22,663) Current period: Unrealized gains (losses) arising during period, before tax 49,688 — 49,688 (21,157) 28,531 Income tax effect (12,919) — (12,919) 5,501 (7,418) Other comprehensive income (loss) before reclassifications 36,769 — 36,769 (15,656) 21,113 Reclassification adjustments for losses (gains) included in net income, before tax (1,001) — (1,001) 1,407 406 Income, tax effect 260 — 260 (366) (106) Amounts reclassified from accumulated other comprehensive income (loss) to net income (741) — (741) 1,041 300 Net current-period other comprehensive income (loss) 36,028 — 36,028 (14,615) 21,413 Balance, December 31, 2019 $ 14,287 $ — $ 14,287 $ (15,537) $ (1,250) (1) Amounts reclassified from accumulated other comprehensive income (loss) on January 1, 2018 as a result of the adoption of ASU 2018-02 and ASU 2016-01 resulted in a decrease in accumulated other comprehensive income of $1.3 million and a corresponding increase in retained earnings for the same amount. (2) Reclassification amounts for available for sale debt securities are reported as gain or loss on sale of investment securities on the consolidated statements of income. (3) Reclassification amounts for cash flow hedges are reported as interest expense for the applicable hedged items on the consolidated statements of income or other non-interest income on the consolidated statements of income for gains recognized from the discontinuance of cash flow hedge accounting for certain interest rate swaps. No cash flow hedges were discontinued during the year ended December 31, 2019. During the year ended December 31, 2018, a reclassification amount of $95 thousand ($70 thousand net of taxes) was reported as a reduction to interest expense on FHLB advances on the consolidated statements of income and a reclassification amount of $2.8 million ($2.1 million net of taxes) was reported as other non-interest income on the consolidated statements of income from the discontinuance of cash flow hedge accounting for certain interest rate swaps.

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Approximate Fair Value of Investment Securities	The amortized cost and approximate fair value of investment securities as of December 31, 2019 and 2018 are summarized as follows: December 31, 2019 (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities Agency-guaranteed residential mortgage-backed securities $ 273,252 $ 5,069 $ — $ 278,321 Corporate notes (1) 284,639 14,238 — 298,877 Available for sale debt securities $ 557,891 $ 19,307 $ — 577,198 Interest-only GNMA securities (2) 16,272 Equity securities (3) 2,406 Total investment securities, at fair value $ 595,876 December 31, 2018 (amounts in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale securities Agency-guaranteed residential mortgage-backed securities $ 311,267 $ — $ (5,893) $ 305,374 Corporate notes (1) 381,407 920 (24,407) 357,920 Available for sale debt securities $ 692,674 $ 920 $ (30,300) 663,294 Equity securities (3) 1,718 Total investment securities, at fair value $ 665,012 (1) At December 31, 2019, includes corporate securities issued by domestic bank holding companies. At December 31, 2018, includes corporate securities issued by other domestic and foreign bank holding companies. (2) Reported at fair value with fair value changes recorded in non-interest income based on fair value option election. (3) Includes equity securities issued by a foreign entity.
Statement of Proceeds from Sale of Available for Sale Investment Securities	The following table presents proceeds from the sale of available for sale debt securities and gross gains and gross losses realized on those sales: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Proceeds from sale of available for sale debt securities $ 97,555 $ 476,182 $ 769,203 Gross gains $ 1,931 $ — $ 8,808 Gross losses (930) (18,659) (8) Net gains (losses) $ 1,001 $ (18,659) $ 8,800
Summary of Investment Securities by Stated Maturity	The following table presents debt securities by stated maturity. Debt securities backed by mortgages and interest-only GNMA securities 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: December 31, 2019 (amounts in thousands) Amortized Cost Fair Value Due in one year or less $ — $ — Due after one year through five years 15,000 15,206 Due after five years through ten years 267,639 281,607 Due after ten years 2,000 2,064 Agency-guaranteed residential mortgage-backed securities 273,252 278,321 Interest-only classes of agency-guaranteed home equity conversion mortgage-backed securities — 16,272 Total debt securities $ 557,891 $ 593,470
Gross Unrealized Losses and Fair Value, Aggregated by Investment Category	At December 31, 2019, there were no available for sale debt securities in an unrealized loss position. Gross unrealized losses and fair value of Customers' available for sale debt securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2018 were as follows: December 31, 2018 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 Agency-guaranteed residential mortgage-backed securities $ 305,374 $ (5,893) $ — $ — $ 305,374 $ (5,893) Corporate notes 310,036 (24,407) — — 310,036 (24,407) Total $ 615,410 $ (30,300) $ — $ — $ 615,410 $ (30,300)

Loans Held for Sale (Tables)

Loans Held for Sale (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables Held-for-sale [Abstract]
Composition of Loans Held for Sale	The composition of loans held for sale as of December 31, 2019 and 2018 was as follows: December 31, (amounts in thousands) 2019 2018 Commercial loans: Multi-family loans, at lower of cost or fair value $ 482,873 $ — Total commercial loans held for sale 482,873 — Consumer loans: Home equity conversion mortgages, at lower of cost or fair value 1,325 — Residential mortgage loans, at fair value 2,130 1,507 Total consumer loans held for sale 3,455 1,507 Loans held for sale $ 486,328 $ 1,507

Loans and Leases Receivable a_2

Loans and Leases Receivable and Allowance for Loan and Lease Losses (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Schedule of Loans Receivable	The following table presents loans and leases receivable as of December 31, 2019 and 2018: December 31, (amounts in thousands) 2019 2018 Loans receivable, mortgage warehouse, at fair value $ 2,245,758 $ 1,405,420 Loans receivable: Commercial: Multi-family 1,909,274 3,285,297 Commercial and industrial (including owner occupied commercial real estate) (1) 2,441,987 1,951,277 Commercial real estate non-owner occupied 1,223,529 1,125,106 Construction 118,418 56,491 Total commercial loans and leases receivable 5,693,208 6,418,171 Consumer: Residential real estate 375,014 566,561 Manufactured housing 70,398 79,731 Other consumer 1,178,283 74,035 Total consumer loans receivable 1,623,695 720,327 Loans and leases receivable 7,316,903 7,138,498 Deferred (fees) costs and unamortized (discounts) premiums, net 2,085 (424) Allowance for loan and lease losses (56,379) (39,972) Total loans and leases receivable, net of allowance for loan and lease losses $ 9,508,367 $ 8,503,522 (1) Includes direct finance equipment leases of $89.2 million and $54.5 million at December 31, 2019 and 2018, respectively.
Loans Receivable by Class and Performance Status	The following tables summarize loans and leases receivable by loan and lease type and performance status as of December 31, 2019 and 2018: December 31, 2019 (amounts in thousands) 30-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Non- accrual Current (2) Purchased-credit-impaired loans (3) Total loans and leases (4) Multi-family $ 2,133 $ — $ 2,133 $ 4,117 $ 1,901,336 $ 1,688 $ 1,909,274 Commercial and industrial 2,395 — 2,395 4,531 1,882,700 354 1,889,980 Commercial real estate owner occupied 5,388 — 5,388 1,963 537,992 6,664 552,007 Commercial real estate non-owner occupied 8,034 — 8,034 76 1,211,892 3,527 1,223,529 Construction — — — — 118,418 — 118,418 Residential real estate 5,924 — 5,924 6,128 359,491 3,471 375,014 Manufactured housing (5) 3,699 1,794 5,493 1,655 61,649 1,601 70,398 Other consumer 5,756 — 5,756 1,551 1,170,793 183 1,178,283 Total $ 33,329 $ 1,794 $ 35,123 $ 20,021 $ 7,244,271 $ 17,488 $ 7,316,903 December 31, 2018 (amounts in thousands) 30-89 Days past due (1) 90 Days or more past due (1) Total past due (1) Non- accrual Current (2) Purchased-credit-impaired loans (3) Total loans and leases (4) Multi-family $ — $ — $ — $ 1,155 $ 3,282,452 $ 1,690 $ 3,285,297 Commercial and industrial 1,914 — 1,914 17,764 1,353,586 536 1,373,800 Commercial real estate owner occupied 193 — 193 1,037 567,809 8,438 577,477 Commercial real estate non-owner occupied 1,190 — 1,190 129 1,119,443 4,344 1,125,106 Construction — — — — 56,491 — 56,491 Residential real estate 5,940 — 5,940 5,605 550,679 4,337 566,561 Manufactured housing (5) 3,926 2,188 6,114 1,693 69,916 2,008 79,731 Other consumer 200 — 200 111 73,503 221 74,035 Total $ 13,363 $ 2,188 $ 15,551 $ 27,494 $ 7,073,879 $ 21,574 $ 7,138,498 (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. (3) Purchased-credit-impaired loans aggregated into a pool are accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows, and the past due status of the pools, or that of the individual loans within the pools, is not meaningful. Due to the credit impaired nature of the loans, the loans are recorded at a discount reflecting estimated future cash flows and the Bank recognizes interest income on each pool of loans reflecting the estimated yield and passage of time. Such loans are considered to be performing. Purchased-credit-impaired loans that are not in pools accrete interest when the timing and amount of their expected cash flows are reasonably estimable, and are reported as performing loans. (4) Amounts exclude deferred costs and fees, unamortized premiums and discounts, and the ALLL. (5) Certain manufactured housing loans purchased in 2010 are supported by cash reserves held at the Bank of $0.1 million and $0.5 million at December 31, 2019 and 2018, respectively, which are used to fund past-due payments when the loan becomes 90 days or more delinquent. Each quarter, these funds are evaluated to determine if they would be sufficient to absorb the probable incurred losses within the manufactured housing portfolio.
Schedule of Allowance for Loan Losses	The changes in the ALLL for the years ended December 31, 2019 and 2018, and the loans and leases and ALLL by loan and lease type based on impairment-evaluation method as of December 31, 2019 and 2018 are presented in the tables below. Twelve months ended December 31, 2019 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Other consumer Total (amounts in thousands) Ending Balance, $ 11,462 $ 12,145 $ 3,320 $ 6,093 $ 624 $ 3,654 $ 145 $ 2,529 $ 39,972 Charge-offs (541) (532) (119) — — (297) — (8,101) (9,590) Recoveries 7 1,050 236 — 136 27 — 314 1,770 Provision for loan and lease losses (4,771) 2,893 (1,202) 150 502 (166) 915 25,906 24,227 Ending Balance, $ 6,157 $ 15,556 $ 2,235 $ 6,243 $ 1,262 $ 3,218 $ 1,060 $ 20,648 $ 56,379 As of December 31, 2019 (amounts in thousands) Loans and leases receivable: Individually evaluated for impairment $ 4,117 $ 4,591 $ 1,976 $ 76 $ — $ 9,063 $ 9,898 $ 1,551 $ 31,272 Collectively evaluated for impairment 1,903,469 1,885,035 543,367 1,219,926 118,418 362,480 58,899 1,176,549 7,268,143 Loans acquired with credit deterioration 1,688 354 6,664 3,527 — 3,471 1,601 183 17,488 Total loans and leases receivable $ 1,909,274 $ 1,889,980 $ 552,007 $ 1,223,529 $ 118,418 $ 375,014 $ 70,398 $ 1,178,283 $ 7,316,903 Allowance for loan and lease losses: Individually evaluated for impairment $ — $ 523 $ 83 $ — $ — $ 44 $ 129 $ 73 $ 852 Collectively evaluated for impairment 6,157 14,768 2,113 4,361 1,262 2,923 897 20,420 52,901 Loans acquired with credit deterioration — 265 39 1,882 — 251 34 155 2,626 Total allowance for loan and lease losses $ 6,157 $ 15,556 $ 2,235 $ 6,243 $ 1,262 $ 3,218 $ 1,060 $ 20,648 $ 56,379 Twelve months ended December 31, 2018 Multi-family Commercial and industrial Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Other consumer Total (amounts in thousands) Ending Balance, $ 12,168 $ 10,918 $ 3,232 $ 7,437 $ 979 $ 2,929 $ 180 $ 172 $ 38,015 Charge-offs — (1,722) (747) — — (466) — (1,822) (4,757) Recoveries — 403 326 5 241 76 — 21 1,072 Provision for loan and lease losses (706) 2,546 509 (1,349) (596) 1,115 (35) 4,158 5,642 Ending Balance, $ 11,462 $ 12,145 $ 3,320 $ 6,093 $ 624 $ 3,654 $ 145 $ 2,529 $ 39,972 As of December 31, 2018 (amounts in thousands) Loans and leases receivable: Individually evaluated for impairment $ 1,155 $ 17,828 $ 1,069 $ 129 $ — $ 8,631 $ 10,195 $ 111 $ 39,118 Collectively evaluated for impairment 3,282,452 1,355,436 567,970 1,120,633 56,491 553,593 67,528 73,703 7,077,806 Loans acquired with credit deterioration 1,690 536 8,438 4,344 — 4,337 2,008 221 21,574 Total loans and leases receivable $ 3,285,297 $ 1,373,800 $ 577,477 $ 1,125,106 $ 56,491 $ 566,561 $ 79,731 $ 74,035 $ 7,138,498 Allowance for loan and lease losses: Individually evaluated for impairment $ 539 $ 261 $ 1 $ — $ — $ 41 $ 3 $ — $ 845 Collectively evaluated for impairment 10,923 11,516 3,319 4,161 624 3,227 89 2,390 36,249 Loans acquired with credit deterioration — 368 — 1,932 — 386 53 139 2,878 Total allowance for loan and lease losses $ 11,462 $ 12,145 $ 3,320 $ 6,093 $ 624 $ 3,654 $ 145 $ 2,529 $ 39,972
Summary of Impaired Loans	Purchased-credit-impaired loans are considered to be performing and are not included in the tables below. December 31, 2019 For the Year Ended (amounts in thousands) Recorded investment net of charge-offs Unpaid principal balance Related allowance Average recorded investment Interest income recognized With no related allowance recorded: Multi-family $ 4,117 $ 4,117 $ — $ 1,223 $ 239 Commercial and industrial 3,084 4,726 — 7,439 1,077 Commercial real estate owner occupied 1,109 1,880 — 1,111 55 Commercial real estate non-owner occupied 76 187 — 97 7 Residential real estate 4,559 4,861 — 2,766 129 Manufactured housing 4,169 4,169 — 5,638 325 Other consumer 140 140 — 4,127 266 With an allowance recorded: Multi-family — — — 231 — Commercial and industrial 1,507 1,507 523 3,723 64 Commercial real estate owner occupied 867 878 83 278 54 Residential real estate 4,504 4,522 44 2,523 119 Manufactured housing 5,729 5,729 129 3,792 253 Other consumer 1,411 1,411 73 584 — Total $ 31,272 $ 34,127 $ 852 $ 33,532 $ 2,588 December 31, 2018 For the Year Ended, For the Year Ended, (amounts in thousands) Recorded investment net of charge-offs Unpaid principal balance Related allowance Average recorded investment Interest income recognized Average recorded investment Interest income recognized With no related allowance recorded: Multi-family $ — $ — $ — $ 537 $ 8 $ — $ — Commercial and industrial 13,660 15,263 — 8,831 673 8,865 214 Commercial real estate owner occupied 1,037 1,766 — 776 19 1,439 70 Commercial real estate non-owner occupied 129 241 — 645 48 898 2 Residential real estate 4,842 5,128 — 4,129 151 4,617 24 Manufactured housing 10,027 10,027 — 10,015 561 10,003 558 Other consumer 111 111 — 89 1 51 — With an allowance recorded: Multi-family 1,155 1,155 539 231 37 — — Commercial and industrial 4,168 4,351 261 6,504 25 5,984 230 Commercial real estate owner occupied 32 32 1 443 3 882 — Residential real estate 3,789 3,789 41 4,566 131 3,307 187 Manufactured housing 168 168 3 214 14 131 8 Total $ 39,118 $ 42,031 $ 845 $ 36,980 $ 1,671 $ 36,177 $ 1,293
Schedule of Total TDRs Based on Loan Type and Accrual Status	The following table presents total TDRs based on loan type and accrual status at December 31, 2019, 2018 and 2017. Nonaccrual TDRs are included in the reported amount of total non-accrual loans. December 31, 2019 2018 2017 Accruing TDRs Nonaccrual TDRs Total Accruing TDRs Nonaccrual TDRs Total Accruing TDRs Nonaccrual TDRs Total (amounts in thousands) Commercial and industrial $ 60 $ 23 $ 83 $ 64 $ 5,273 $ 5,337 $ 63 $ 5,939 $ 6,002 Commercial real estate owner occupied 13 — 13 32 — 32 — — — Residential real estate 2,935 631 3,566 3,026 667 3,693 3,828 703 4,531 Manufactured housing 8,243 1,382 9,625 8,502 1,620 10,122 8,130 1,766 9,896 Other consumer — 10 10 — 12 12 — — — Total TDRs $ 11,251 $ 2,046 $ 13,297 $ 11,624 $ 7,572 $ 19,196 $ 12,021 $ 8,408 $ 20,429
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 years ended December 31, 2019, 2018 and 2017. There were no modifications that involved forgiveness of debt for the years ended December 31, 2019, 2018 and 2017. For the Years Ended December 31, 2019 2018 2017 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Extensions of maturity 2 $ 514 2 $ 60 5 $ 6,497 Interest-rate reductions 26 923 39 1,615 35 1,574 Total 28 $ 1,437 41 $ 1,675 40 $ 8,071
Summary of Loans and Leases Modified in Troubled Debt Restructurings and Recorded Investments	The following table provides, by loan type, the number of loans modified in TDRs and the related recorded investment for the years ended December 31, 2019, 2018 and 2017. For the Years Ended December 31, 2019 2018 2017 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Commercial and industrial 1 $ 431 — $ — 4 $ 6,437 Residential real estate 1 83 2 352 — — Manufactured housing 26 923 38 1,310 36 1,634 Other consumer — — 1 13 — — Total loans 28 $ 1,437 41 $ 1,675 40 $ 8,071
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: December 31, 2019 December 31, 2018 December 31, 2017 (dollars in thousands) Number of loans Recorded investment Number of loans Recorded investment Number of loans Recorded investment Residential real estate $ 1 $ 81 $ — $ — $ — $ — Manufactured housing 3 73 4 92 5 211 Total loans 4 $ 154 4 $ 92 5 $ 211
Changes in Accretable Discount Related to Purchased Credit Impaired Loans	The changes in accretable yield related to PCI loans for the years ended December 31, 2019, 2018 and 2017 were as follows: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Accretable yield balance, beginning of period $ 6,178 $ 7,825 $ 10,202 Accretion to interest income (1,144) (1,455) (1,673) Reclassification from nonaccretable difference and disposals, net 44 (192) (704) Accretable yield balance, end of period $ 5,078 $ 6,178 $ 7,825
Credit Quality Tables	The following tables present the credit ratings of loans and leases receivable as of December 31, 2019 and 2018. December 31, 2019 (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 Other consumer Total (3) Pass/Satisfactory $ 1,816,200 $ 1,841,074 $ 536,777 $ 1,129,838 $ 118,418 $ — $ — $ — $ 5,442,307 Special Mention 69,637 26,285 8,286 6,949 — — — — 111,157 Substandard 23,437 22,621 6,944 86,742 — — — — 139,744 Performing (1) — — — — — 362,962 63,250 1,170,976 1,597,188 Non-performing (2) — — — — — 12,052 7,148 7,307 26,507 Total $ 1,909,274 $ 1,889,980 $ 552,007 $ 1,223,529 $ 118,418 $ 375,014 $ 70,398 $ 1,178,283 $ 7,316,903 December 31, 2018 (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 Other consumer Total (3) Pass/Satisfactory $ 3,201,822 $ 1,306,466 $ 562,639 $ 1,054,493 $ 56,491 $ — $ — $ — $ 6,181,911 Special Mention 55,696 30,551 9,730 30,203 — — — — 126,180 Substandard 27,779 36,783 5,108 40,410 — — — — 110,080 Performing (1) — — — — — 555,016 71,924 73,724 700,664 Non-performing (2) — — — — — 11,545 7,807 311 19,663 Total $ 3,285,297 $ 1,373,800 $ 577,477 $ 1,125,106 $ 56,491 $ 566,561 $ 79,731 $ 74,035 $ 7,138,498 (1) Includes residential real estate, manufactured housing, and other consumer loans not assigned internal ratings. (2) Includes residential real estate, manufactured housing, and other consumer loans that are past due and still accruing interest or on nonaccrual status.
Schedule of Loan Purchases and Sales	Purchases and sales of loans were as follows for the years ended December 31, 2019, 2018 and 2017: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Purchases (1) Residential real estate $ 105,858 $ 368,402 $ 264,090 Other consumer (2) 1,058,261 30,066 — Total $ 1,164,119 $ 398,468 $ 264,090 Sales (3) Multi-family $ — $ (54,638) $ (226,831) Commercial and industrial (4) (22,267) (32,263) (19,974) Commercial real estate owner occupied (4) (16,320) (20,218) (19,813) Residential real estate (230,285) — (191,574) Total $ (268,872) $ (107,119) $ (458,192) (1) Amounts reported represent the unpaid principal balance at time of purchase. The purchase price was 100.3%, 99.9% and 99.4% of loans outstanding for the years ended December 31, 2019, 2018 and 2017, respectively. (2) Other consumer loan purchases for the year ended December 31, 2019 and 2018, consist of third-party originated unsecured consumer loans. None of the loans are considered sub-prime at the time of origination. Customers considers sub-prime borrowers to be those with FICO scores below 660. (3) Amounts reported represent the unpaid principal balance at time of sale. For the years ended December 31, 2019, 2018 and 2017, loan sales resulted in net gains of $2.8 million, $3.3 million and $4.2 million, respectively. (4) Primarily sales of SBA loans.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
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 December 31, 2019 ASSETS Operating lease ROU assets Other assets $ 20,232 LIABILITIES Operating lease liabilities Other liabilities $ 21,358
Lease, Cost	The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: (amounts in thousands) Classification Year Ended December 31, 2019 Operating lease cost (1) Occupancy expenses $ 5,823 (1) There were no variable lease costs for the year ended December 31, 2019, and sublease income for operating leases is immaterial.
Future Minimum Rental Commitments under Non-Cancelable Leases	Maturities of non-cancelable operating lease liabilities were as follows at December 31, 2019: (amounts in thousands) December 31, 2019 2020 $ 5,539 2021 4,792 2022 4,167 2023 3,174 2024 2,100 Thereafter 2,817 Total minimum payments 22,589 Less: interest 1,231 Present value of lease liabilities $ 21,358
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 December 31, 2019: (amounts in thousands) December 31, 2019 Weighted average remaining lease term (years) Operating leases 5.0 years Weighted average discount rate Operating leases 2.90 %
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 December 31, 2019: (amounts in thousands) Classification December 31, 2019 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 91,762 Guaranteed residual assets Loans and leases receivable 7,435 Unguaranteed residual assets Loans and leases receivable 1,260 Deferred initial direct costs Loans and leases receivable 721 Unearned income Loans and leases receivable (11,300) Net investment in direct financing leases $ 89,878 Operating leases Investment in operating leases Other assets $ 107,850 Accumulated depreciation Other assets (14,251) Deferred initial direct costs Other assets 1,052 Net investment in operating leases 94,651 Total lease assets $ 184,529

Bank Premises and Equipment (Ta

Bank Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Components of Bank Premises and Equipment	The components of bank premises and equipment as of December 31, 2019 and 2018 were as follows: December 31, (amounts in thousands) Expected Useful Life 2019 2018 Leasehold improvements 3 to 25 years $ 14,218 $ 14,080 Furniture, fixtures and equipment 5 to 10 years 6,333 7,110 IT equipment 3 to 5 years 10,016 8,645 Automobiles 3 to 5 years 492 455 31,059 30,290 Accumulated depreciation and amortization (21,670) (19,227) Total $ 9,389 $ 11,063

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Components of Deposits	The components of deposits at December 31, 2019 and 2018 were as follows: December 31, (amounts in thousands) 2019 2018 Demand, non-interest bearing $ 1,343,391 $ 1,122,171 Demand, interest bearing 1,235,292 803,948 Savings, including money market deposit accounts 4,401,719 3,481,936 Time, $100,000 and over 402,161 792,370 Time, other 1,266,373 941,811 Total deposits $ 8,648,936 $ 7,142,236
Schedule of Time Deposit Maturities	The scheduled maturities for time deposits at December 31, 2019 were as follows: (amounts in thousands) December 31, 2019 2020 $ 1,467,088 2021 175,994 2022 19,489 2023 2,490 2024 3,473 Total time deposits $ 1,668,534

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Short Term Borrowings	Short-term debt at December 31, 2019 and 2018 was as follows: December 31, 2019 2018 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ 500,000 2.15 % $ 1,248,070 2.62 % Federal funds purchased 538,000 1.60 % 187,000 2.60 % Total short-term debt $ 1,038,000 $ 1,435,070
Summary of Bancorps Short Term Borrowings	The following is a summary of additional information relating to Customers' short-term debt: December 31, (dollars in thousands) 2019 2018 2017 FHLB advances Maximum outstanding at any month end $ 1,190,150 $ 2,622,165 $ 2,283,250 Average balance during the year 793,304 1,526,180 1,415,755 Weighted-average interest rate during the year 2.66 % 2.05 % 1.44 % Federal funds purchased Maximum outstanding at any month end 600,000 195,000 238,000 Average balance during the year 271,400 156,652 163,466 Weighted-average interest rate during the year 2.28 % 1.92 % 1.19 %
Schedule of Long-term Debt	FHLB and FRB advances Long-term FHLB and FRB advances at December 31, 2019 and 2018 were as follows: December 31, 2019 2018 (dollars in thousands) Amount Rate Amount Rate FHLB advances $ 350,000 2.36 % $ — — % Total long-term FHLB advances $ 350,000 $ — There were no advances outstanding with the FRB at December 31, 2019 and 2018, respectively. The maximum borrowing capacity with the FHLB and FRB at December 31, 2019 and 2018, was as follows: December 31, (amounts in thousands) 2019 2018 Total maximum borrowing capacity with the FHLB $ 3,445,416 $ 4,146,899 Total maximum borrowing capacity with the FRB 136,842 102,461 Qualifying loans serving as collateral against FHLB and FRB advances 4,496,983 5,221,957 Senior and Subordinated Debt Long-term senior notes and subordinated debt at December 31, 2019 and 2018 were as follows: December 31, (dollars in thousands) 2019 2018 Issued by Ranking Amount Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior $ 24,432 $ — 4.500 % $ 25,000 September 2019 September 2024 100.000 % Customers Bancorp Senior 99,198 98,911 3.950 % 100,000 June 2017 June 2022 99.775 % Customers Bancorp Senior — 24,960 4.625 % 25,000 June 2014 June 2019 100.000 % Total other borrowings 123,630 123,871 Customers Bancorp Subordinated (1)(2) 72,040 — 5.375 % 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (1)(3) 109,075 108,977 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 181,115 $ 108,977 (1) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (2) Customers Bancorp has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after December 30, 2029.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Schedule of Preferred Stock and Dividends Paid Per Share	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 December 31, Carrying value at December 31, Contractual Rate in Effect at December 31, 2019 Date at which dividend rate becomes floating and earliest redemption date Floating rate of Three-Month LIBOR Plus: Dividend Paid Per Share in 2019 Fixed-to-floating rate: Issue Date 2019 2018 2019 2018 Series C May 18, 2015 2,300,000 2,300,000 $ 55,569 $ 55,569 7.00 % June 15, 2020 5.300 % $ 1.75 Series D January 29, 2016 1,000,000 1,000,000 24,108 24,108 6.50 % March 15, 2021 5.090 % $ 1.63 Series E April 28, 2016 2,300,000 2,300,000 55,593 55,593 6.45 % June 15, 2021 5.140 % $ 1.61 Series F September 16, 2016 3,400,000 3,400,000 82,201 82,201 6.00 % December 15, 2021 4.762 % $ 1.50 Totals 9,000,000 9,000,000 $ 217,471 $ 217,471

Share-Based Compensation Plans

Share-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Statement of Weighted-Average Assumptions Used and Resulting Weighted-Average Fair Value of Option	The following table presents the weighted-average assumptions used and the resulting weighted-average fair value of each option granted for the periods presented. 2019 2018 2017 Weighted-average risk-free interest rate 1.69 % 2.87 % 2.35 % Expected dividend yield — % — % — % Weighted-average expected volatility 29.92 % 25.47 % 25.05 % Weighted-average expected life (in years) 7.00 7.00 7.00 Weighted-average fair value of each option granted $ 5.56 $ 10.05 $ 8.68
Summary of Stock Option Activity	The following table summarizes stock option activity for the year ended December 31, 2019: Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term in Years Aggregate Intrinsic Value (dollars in thousands, except weighted-average exercise price) Outstanding, December 31, 2018 2,520,526 $ 22.13 Granted 577,230 19.05 Exercised (82,500) 16.79 $ 341 Expired (90,000) 25.19 Forfeited (95,008) 21.19 Outstanding, December 31, 2019 2,830,248 $ 21.59 6.45 $ 9,212 Exercisable at December 31, 2019 766,739 $ 15.52 3.46 $ 6,390
Summary of Non-Vested Options	A summary of the status of Customers' non-vested options at December 31, 2019, and changes during the year ended December 31, 2019 was as follows: Options Weighted- Average exercise price Non-vested at December 31, 2018 1,671,223 $ 25.10 Granted 577,230 19.05 Vested (89,936) 19.33 Forfeited (95,008) 21.19 Non-vested at December 31, 2019 2,063,509 23.85
Status of Restricted Stock	The table below presents the status of the restricted stock units at December 31, 2019, and changes during the year ended December 31, 2019: Restricted Stock Units Weighted- Average Grant- Date Fair Value Outstanding and unvested at December 31, 2018 884,659 $ 23.99 Granted 177,627 20.27 Vested (281,905) 23.22 Forfeited (62,700) 23.25 Outstanding and unvested at December 31, 2019 717,681 23.43

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Components of Income Tax Expense	The components of income tax expense were as follows: For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Current Federal $ 2,973 $ 4,509 $ 24,258 State 5,304 5,547 5,666 Total current expense 8,277 10,056 29,924 Deferred Federal 13,175 9,702 14,885 State 1,341 (399) 233 Total deferred expense 14,516 9,303 15,118 Income tax expense $ 22,793 $ 19,359 $ 45,042
Schedule of Income (Loss) Before Income Tax Expense (Benefit)	Effective tax rates differ from the federal statutory rate of 21% at December 31, 2019 and December 31, 2018, and 35% at December 31, 2017, which was applied to income before income tax expense, due to the following: For the Years Ended December 31, 2019 2018 2017 (amounts in thousands) Amount % of pretax income Amount % of pretax income Amount % of pretax income Federal income tax at statutory rate $ 21,445 21.00 % $ 19,121 21.00 % $ 43,357 35.00 % State income tax, net of federal benefit 5,249 5.14 4,067 4.47 3,835 3.10 Tax-exempt interest, net of disallowance (385) (0.38) (360) (0.40) (381) (0.31) Bank-owned life insurance (1,677) (1.64) (1,547) (1.70) (2,675) (2.16) Tax credits (1,266) (1.24) (444) (0.49) — — Equity-based compensation 132 0.13 (547) (0.60) (10,741) (8.67) Non-deductible executive compensation 440 0.43 230 0.25 654 0.53 Unrecorded basis difference in foreign subsidiaries (144) (0.14) 343 0.38 4,527 3.65 Enactment of federal tax reform — — (21) (0.02) 5,505 4.44 Other (1,001) (0.98) (1,483) (1.63) 961 0.78 Effective income tax rate $ 22,793 22.32 % $ 19,359 21.26 % $ 45,042 36.36 %
Components of Net Deferred Tax Assets (Liabilities)	The following represents Customers' deferred tax asset and liabilities as December 31, 2019 and 2018: December 31, (amounts in thousands) 2019 2018 Deferred tax assets Allowance for loan and lease losses $ 14,616 $ 10,449 Net unrealized losses on securities — 7,639 Net operating losses 1,494 1,212 Compensation and benefits 5,839 6,234 Cash flow hedge 5,557 324 Section 197 intangibles 1,196 923 Deferred income 1,182 640 Lease liability 5,523 — Other 1,307 2,766 Total gross deferred tax assets 36,714 30,187 Less: valuation allowance (486) — Net deferred tax assets 36,228 30,187 Deferred tax liabilities Fair value adjustments on acquisitions (506) (569) Bank premises and equipment (6,074) (884) Tax qualified lease adjustments (30,496) (17,786) Right of use asset (5,232) — Net unrealized gains on securities (5,020) — Other (640) (746) Total deferred tax liabilities (47,968) (19,985) Net deferred tax asset/(liability) $ (11,740) $ 10,202

Transactions with Executive O_2

Transactions with Executive Officers, Directors, and Principal Shareholders (Tables)	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Schedule of Activity Relating to Loans	The activity relating to loans to such persons was as follows: For the Years Ended December 31, 2019 2018 2017 (amounts in thousands) Balance as of December 31, $ 5 $ — $ 238 Additions 47 27 99 Repayments (52) (22) (337) Balance as of December 31, $ — $ 5 $ —

Financial Instruments with Of_2

Financial Instruments with Off-Balance-Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Financial Instruments Outstanding Contract Amounts Represent Credit Risk	As of December 31, 2019 and 2018, the following off-balance sheet commitments, financial instruments and other arrangements were outstanding: December 31, (amounts in thousands) 2019 2018 Commitments to fund loans and leases $ 261,902 $ 345,608 Unfunded commitments to fund mortgage warehouse loans 1,378,364 1,537,900 Unfunded commitments under lines of credit and credit cards 1,065,474 867,131 Letters of credit 48,856 55,659 Other unused commitments 2,736 4,822

Regulatory Capital (Tables)

Regulatory Capital (Tables)	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [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 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 December 31, 2019 Common equity Tier 1 (to risk-weighted assets) Customers Bancorp, Inc. $ 821,810 7.984 % $ 463,211 4.500 % N/A N/A $ 720,551 7.000 % Customers Bank $ 1,164,652 11.323 % $ 462,842 4.500 % $ 668,549 6.500 % $ 719,976 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,039,281 10.096 % $ 617,615 6.000 % N/A N/A $ 874,955 8.500 % Customers Bank $ 1,164,652 11.323 % $ 617,122 6.000 % $ 822,829 8.000 % $ 874,256 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,256,309 12.205 % $ 823,487 8.000 % N/A N/A $ 1,080,827 10.500 % Customers Bank $ 1,330,155 12.933 % $ 822,829 8.000 % $ 1,028,537 10.000 % $ 1,079,964 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,039,281 9.258 % $ 449,026 4.000 % N/A N/A $ 449,026 4.000 % Customers Bank $ 1,164,652 10.379 % $ 448,851 4.000 % $ 561,064 5.000 % $ 448,851 4.000 % December 31, 2018 Common equity Tier 1 (to risk-weighted assets) Customers Bancorp, Inc. $ 745,795 8.964 % $ 374,388 4.500 % N/A N/A $ 530,384 6.375 % Customers Bank $ 1,066,121 12.822 % $ 374,160 4.500 % $ 540,453 6.500 % $ 530,059 6.375 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 963,266 11.578 % $ 499,185 6.000 % N/A N/A $ 655,180 7.875 % Customers Bank $ 1,066,121 12.822 % $ 498,879 6.000 % $ 665,173 8.000 % $ 654,779 7.875 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,081,962 13.005 % $ 655,580 8.000 % N/A N/A $ 821,575 9.875 % Customers Bank $ 1,215,522 14.619 % $ 665,173 8.000 % $ 831,466 10.000 % $ 821,072 9.875 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 963,266 9.665 % $ 398,668 4.000 % N/A N/A $ 398,668 4.000 % Customers Bank $ 1,066,121 10.699 % $ 398,570 4.000 % $ 498,212 5.000 % $ 398,570 4.000 %

Disclosures about Fair Value _2

Disclosures about Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The estimated fair values of Customers’ financial instruments at December 31, 2019 and 2018 were as follows: Carrying Amount Estimated Fair Value Fair Value Measurements at December 31, 2019 (amounts in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Cash and cash equivalents $ 212,505 $ 212,505 $ 212,505 $ — $ — Debt securities, available for sale 577,198 577,198 — 577,198 — Interest-only GNMA securities 16,272 16,272 — — 16,272 Equity securities 2,406 2,406 2,406 — — Loans held for sale 486,328 486,328 — 2,130 484,198 Total loans and leases receivable, net of allowance for loan and lease losses 9,508,367 9,853,037 — 2,245,758 7,607,279 FHLB, Federal Reserve Bank and other restricted stock 84,214 84,214 — 84,214 — Derivatives 23,608 23,608 — 23,529 79 Liabilities: Deposits $ 8,648,936 $ 8,652,340 $ 6,980,402 $ 1,671,938 $ — Federal funds purchased 538,000 538,000 538,000 — — FHLB advances 850,000 852,162 — 852,162 — Other borrowings 123,630 127,603 — 127,603 — Subordinated debt 181,115 192,217 — 192,217 — Derivatives 45,939 45,939 — 45,939 — Carrying Amount Estimated Fair Value Fair Value Measurements at December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (amounts in thousands) Assets: Cash and cash equivalents $ 62,135 $ 62,135 $ 62,135 $ — $ — Debt securities, available for sale 663,294 663,294 — 663,294 — Equity securities 1,718 1,718 1,718 — — Loans held for sale 1,507 1,507 — 1,507 — Total loans and leases receivable, net of allowance for loan and lease losses 8,503,522 8,481,128 — 1,405,420 7,075,708 FHLB, Federal Reserve Bank, and other restricted stock 89,685 89,685 — 89,685 — Derivatives 14,693 14,693 — 14,624 69 Liabilities: Deposits $ 7,142,236 $ 7,136,009 $ 5,408,055 $ 1,727,954 $ — Federal funds purchased 187,000 187,000 187,000 — — FHLB advances 1,248,070 1,248,046 998,070 249,976 — Other borrowings 123,871 121,718 — 121,718 — Subordinated debt 108,977 110,550 — 110,550 — Derivatives 16,286 16,286 — 16,286 —
Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Non-recurring Basis	For financial assets and liabilities measured at fair value on a recurring and non-recurring basis, the fair value measurements by level within the fair value hierarchy used at December 31, 2019 and 2018 were as follows: December 31, 2019 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 securities: Agency-guaranteed residential mortgage-backed securities $ — $ 278,321 $ — $ 278,321 Corporate notes — 298,877 — 298,877 Interest-only GNMA securities — — 16,272 16,272 Equity securities 2,406 — — 2,406 Derivatives — 23,529 79 23,608 Loans held for sale – fair value option — 2,130 — 2,130 Loans receivable, mortgage warehouse – fair value option — 2,245,758 — 2,245,758 Total assets – recurring fair value measurements $ 2,406 $ 2,848,615 $ 16,351 $ 2,867,372 Liabilities Derivatives $ — $ 45,939 $ — $ 45,939 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of specific reserves of $852 $ — $ — $ 14,272 $ 14,272 Other real estate owned — — 78 78 Total assets – nonrecurring fair value measurements $ — $ — $ 14,350 $ 14,350 December 31, 2018 Fair Value Measurements at the End of the Reporting Period Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (amounts in thousands) Measured at Fair Value on a Recurring Basis: Assets Available for sale securities: Agency-guaranteed residential mortgage-backed securities $ — $ 305,374 $ — $ 305,374 Corporate notes — 357,920 — 357,920 Equity securities 1,718 — — 1,718 Derivatives — 14,624 69 14,693 Loans held for sale – fair value option — 1,507 — 1,507 Loans receivable, mortgage warehouse – fair value option — 1,405,420 — 1,405,420 Total assets - recurring fair value measurements $ 1,718 $ 2,084,845 $ 69 $ 2,086,632 Liabilities Derivatives $ — $ 16,286 $ — $ 16,286 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of specific reserves of $845 $ — $ — $ 10,876 $ 10,876 Other real estate owned — — 621 621 Total assets – nonrecurring fair value measurements $ — $ — $ 11,497 $ 11,497
Statement of Changes in Level 3 Assets and Liabilities 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 years ended December 31, 2019 and 2018 are summarized as follows in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 20 — DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments For the Years Ended December 31, (amounts in thousands) 2019 2018 Balance at December 31, $ 69 $ 60 Issuances 451 407 Settlements (441) (398) Balance at December 31, $ 79 $ 69
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 December 31, 2019 and 2018 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. The interest-only GNMA securities are Level 3 assets measured at fair value on a recurring basis under a fair value option election. For the year ended December 31, 2019, Customers recorded an increase in fair value of $0.6 million on the interest-only GNMA securities in unrealized gains on investment securities in the consolidated statements of operations. For the year ended December 31, 2019, cash settlements of $1.5 million were applied to the carrying value of the interest-only GNMA securities, net of premium amortization expense. At December 31, 2019, Customers used an internally developed discounted cash flow model to value the interest-only GNMA securities. The significant unobservable input used in the discounted cash flow model included prepayment speed. Significant increases (decreases) in this input would result in a significantly lower (higher) fair value measurement. Quantitative Information about Level 3 Fair Value Measurements December 31, 2019 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (4) (dollars in thousands) Impaired loans – real estate $ 12,767 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 8% - 10% (8%) 34% - 45% (37%) Impaired loans – commercial & industrial 1,505 Collateral appraisal (1) Business asset valuation (3) Liquidation expenses (2) Business asset valuation adjustments (4) 8% - 8% (8%) 8% - 50% (22%) Interest-only GNMA securities 16,272 Discounted cash flow Constant prepayment rate 9% - 14% (12%) Other real estate owned 78 Collateral appraisal (1) Liquidation expenses (2) 8% - 9% (9%) Residential mortgage loan commitments 79 Adjusted market bid Pull-through rate 85% - 85% (85%) (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 December 31, 2018 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (4) (dollars in thousands) Impaired loans – real estate $ 10,260 Collateral appraisal (1) Liquidation expenses (2) 8% - 8% (8%) Impaired loans – commercial & industrial 616 Business asset valuation (3) Business asset valuation adjustments (4) 8% - 50% (26%) Other real estate owned 621 Collateral appraisal (1) Liquidation expenses (2) 8% - 8% (8%) Residential mortgage loan commitments 69 Adjusted market bid Pull-through rate 90% - 90% (90%) (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)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Financial Instruments	The following table presents the fair value of Customers’ derivative financial instruments as well as their presentation on the consolidated balance sheets at December 31, 2019 and 2018. December 31, 2019 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ — Other liabilities $ 21,374 Total $ — $ 21,374 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 23,301 Other liabilities $ 24,797 Interest rate caps Other assets 9 Other liabilities 9 Credit contracts Other assets 219 Other liabilities (241) Residential mortgage loan commitments Other assets 79 Other liabilities — Total $ 23,608 $ 24,565 December 31, 2018 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 $ 256 Other liabilities $ 1,502 Total $ 256 $ 1,502 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 14,300 Other liabilities $ 14,730 Credit contracts Other assets 68 Other liabilities 54 Residential mortgage loan commitments Other assets 69 Other liabilities — Total $ 14,437 $ 14,784
Effect of Derivative Instruments on Comprehensive Income	The following table presents amounts included in the consolidated statements of income related to derivatives not designated as hedges for the years ended December 31, 2019, 2018 and 2017. Amount of Income Recognized in Earnings For the Years Ended December 31, (amounts in thousands) Income Statement Location 2019 2018 2017 Derivatives not designated as hedging instruments: Interest rate swaps (1) Other non-interest income $ 2,549 $ 3,409 $ 604 Interest rate caps Other non-interest income 24 — — Credit contracts Other non-interest income 589 127 171 Residential mortgage loan commitments Mortgage banking income 10 9 15 Total $ 3,172 $ 3,545 $ 790 (1) Includes income recognized from discontinued cash flow hedges for the year ended December 31, 2018. Effect of Derivative Instruments on Comprehensive Income The following table presents the effect of Customers' derivative financial instruments on comprehensive income for the years ended December 31, 2019, 2018 and 2017. For the Year Ended December 31, 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 (amounts in thousands) 2019 2018 2017 2019 2018 2017 Derivatives in cash flow hedging relationships: Interest rate swaps $ (15,656) $ 1,477 $ 406 Interest expense $ (1,407) $ 95 $ (2,634) Other non-interest income (2) — 2,822 — $ (1,407) $ 2,917 $ (2,634) (1) Amounts presented are net of taxes. See Note 4 - 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. (2) Includes income recognized from discontinued cash flow hedges.
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 Not Offset in the Consolidated Balance Sheet (amounts in thousands) Gross Amounts Recognized on the Consolidated Balance Sheets Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2019 Interest rate derivative assets with institutional counterparties $ 432 $ — $ — $ 432 Interest rate derivative liabilities with institutional counterparties $ 45,727 $ — $ (45,727) $ — Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Gross Amounts Recognized on the Consolidated Balance Sheets Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2018 Interest rate derivative assets with institutional counterparties $ 7,529 $ — $ 1,860 $ 5,669 Interest rate derivative liabilities with institutional counterparties $ 9,077 $ — $ (702) $ 8,375
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 Not Offset in the Consolidated Balance Sheet (amounts in thousands) Gross Amounts Recognized on the Consolidated Balance Sheets Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2019 Interest rate derivative assets with institutional counterparties $ 432 $ — $ — $ 432 Interest rate derivative liabilities with institutional counterparties $ 45,727 $ — $ (45,727) $ — Gross Amounts Not Offset in the Consolidated Balance Sheet (amounts in thousands) Gross Amounts Recognized on the Consolidated Balance Sheets Financial Instruments Cash Collateral Received/(Posted) Net Amount December 31, 2018 Interest rate derivative assets with institutional counterparties $ 7,529 $ — $ 1,860 $ 5,669 Interest rate derivative liabilities with institutional counterparties $ 9,077 $ — $ (702) $ 8,375

Condensed Financial Statement_2

Condensed Financial Statements of Parent Company (Tables)	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Summary of Condensed Balance Sheets of Parent Company	Balance Sheets December 31, (amounts in thousands) 2019 2018 Assets Cash in subsidiary bank $ 62,643 $ 16,684 Investments in and receivables due from bank subsidiary 1,178,166 1,059,671 Investments in and receivables due from non-bank subsidiaries 2,406 1,718 Other assets 6,583 3,417 Total assets $ 1,249,798 $ 1,081,490 Liabilities and Shareholders' equity Borrowings $ 195,670 $ 123,871 Other liabilities 1,333 803 Total liabilities 197,003 124,674 Shareholders' equity 1,052,795 956,816 Total Liabilities and Shareholders' Equity $ 1,249,798 $ 1,081,490
Summary of Condensed Income Statements of Parent Company	Income and Comprehensive Income Statements For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Operating income: Other, including dividends from bank subsidiary $ 70,000 $ 45,422 $ 38,200 Total operating income 70,000 45,422 38,200 Operating expense: Interest 5,425 8,178 7,984 Other 744 1,722 1,742 Total operating expense 6,169 9,900 9,726 Income before taxes and undistributed income of subsidiaries 63,831 35,522 28,474 Income tax benefit 1,391 2,335 3,620 Income before undistributed income of subsidiaries 65,222 37,857 32,094 Equity in undistributed income of subsidiaries 14,105 33,838 46,743 Net income 79,327 71,695 78,837 Preferred stock dividends 14,459 14,459 14,459 Net income available to common shareholders 64,868 57,236 64,378 Comprehensive income $ 100,740 $ 50,730 $ 83,370
Summary of Condensed Statements of Cash Flows of Parent Company	Statements of Cash Flows For the Years Ended December 31, (amounts in thousands) 2019 2018 2017 Cash Flows from Operating Activities Net income $ 79,327 $ 71,695 $ 78,837 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Equity in undistributed earnings of subsidiaries, net of dividends received from Bank (14,105) (33,838) (46,743) (Increase) decrease in other assets (3,166) (256) 7,624 Increase (decrease) in other liabilities 1,775 (251) (1,322) Net Cash Provided By (Used in) Operating Activities 63,831 37,350 38,396 Cash Flows from Investing Activities Payments for investments in and advances to subsidiaries (74,767) (29) (98,725) Net Cash Used in Investing Activities (74,767) (29) (98,725) Cash Flows from Financing Activities Proceeds from issuance of common stock 2,150 3,585 2,716 Proceeds from issuance of subordinated long-term debt 72,030 — — Proceed from issuance of other long-term borrowings 24,477 — 98,564 Repayments of other borrowings (25,000) (63,250) — Exercise and redemption of warrants — 112 1,059 Purchase of treasury stock (571) (12,976) — Payments of employee taxes withheld from share-based awards (1,732) (880) (14,761) Preferred stock dividends paid (14,459) (14,459) (14,459) Net Cash Provided by (Used in) Financing Activities 56,895 (87,868) 73,119 Net Increase (Decrease) in Cash and Cash Equivalents 45,959 (50,547) 12,790 Cash and Cash Equivalents - Beginning 16,684 67,231 54,441 Cash and Cash Equivalents - Ending $ 62,643 $ 16,684 $ 67,231

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The following table presents selected quarterly data for the years ended December 31, 2019 and 2018. 2019 Quarter Ended December 31 September 30 June 30 March 31 (amounts in thousands, except per share data) Interest income $ 123,995 $ 126,718 $ 111,950 $ 101,075 Interest expense 46,402 50,983 47,271 41,771 Net interest income 77,593 75,735 64,679 59,304 Provision for loan and lease losses 9,689 4,426 5,346 4,767 Non-interest income (1) 25,813 23,369 12,036 19,718 Non-interest expenses 58,740 59,592 59,582 53,984 Income before income taxes 34,977 35,086 11,787 20,271 Provision for income taxes 7,451 8,020 2,491 4,831 Net income 27,526 27,066 9,296 15,440 Preferred stock dividends 3,615 3,615 3,615 3,615 Net income available to common shareholders $ 23,911 $ 23,451 $ 5,681 $ 11,825 Earnings per common share: Basic earnings per common share $ 0.76 $ 0.75 $ 0.18 $ 0.38 Diluted earnings per common share $ 0.75 $ 0.74 $ 0.18 $ 0.38 (1) The quarter ended June 30, 2019 included a $7.5 million loss due to a shortfall in the fair value of interest-only GNMA securities acquired from a commercial mortgage warehouse customer. 2018 Quarter Ended December 31 September 30 June 30 March 31 (amounts in thousands, except per share data) Interest income $ 103,303 $ 110,045 $ 107,639 $ 96,964 Interest expense 41,779 46,044 40,317 31,933 Net interest income 61,524 64,001 67,322 65,031 Provision for loan and lease losses 1,385 2,924 (784) 2,117 Non-interest income (2) 19,877 2,084 16,127 20,910 Non-interest expenses 57,045 57,104 53,750 52,280 Income before income taxes 22,971 6,057 30,483 31,544 Provision for income taxes 5,109 28 6,820 7,402 Net income 17,862 6,029 23,663 24,142 Preferred stock dividends 3,615 3,615 3,615 3,615 Net income available to common shareholders $ 14,247 $ 2,414 $ 20,048 $ 20,527 Earnings per common share: Basic earnings per common share $ 0.45 $ 0.08 $ 0.64 $ 0.65 Diluted earnings per common share $ 0.44 $ 0.07 $ 0.62 $ 0.64 (2) The quarter ended September 30, 2018 included an $18.7 million loss on sale of investment securities.

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables present the operating results for Customers' reportable business segments for the years ended December 31, 2019, 2018 and 2017. The segment financial results include directly attributable revenues and expenses. Consistent with the presentation of segment results to Customers' chief operating decision makers, overhead costs and preferred stock dividends are assigned to the Customers Bank Business Banking segment. The tax benefit assigned to BankMobile was based on an estimated effective tax rate of 22.55%, 24.56% and 37.67% for the years ended December 31, 2019, 2018 and 2017, respectively. For the Year Ended December 31, 2019 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Interest income (1) $ 422,094 $ 41,645 $ 463,739 Interest expense 185,513 916 186,429 Net interest income 236,581 40,729 277,310 Provision for loan and lease losses 10,091 14,136 24,227 Non-interest income 35,268 45,670 80,938 Non-interest expense 153,333 78,568 231,901 Income (loss) before income tax expense (benefit) 108,425 (6,305) 102,120 Income tax expense (benefit) 24,215 (1,422) 22,793 Net income (loss) 84,210 (4,883) 79,327 Preferred stock dividends 14,459 — 14,459 Net income (loss) available to common shareholders $ 69,751 $ (4,883) $ 64,868 As of December 31, 2019 Goodwill and other intangibles $ 3,629 $ 11,566 $ 15,195 Total assets (2) $ 10,990,550 $ 530,167 $ 11,520,717 Total deposits $ 8,247,836 $ 401,100 $ 8,648,936 Total non-deposit liabilities (2) $ 1,789,329 $ 29,657 $ 1,818,986 For the Year Ended December 31, 2018 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Interest income (1) $ 400,948 $ 17,003 $ 417,951 Interest expense 159,674 400 160,074 Net interest income 241,274 16,603 257,877 Provision for loan and lease losses 2,928 2,714 5,642 Non-interest income 17,499 41,499 58,998 Non-interest expense 146,946 73,233 220,179 Income (loss) before income tax expense (benefit) 108,899 (17,845) 91,054 Income tax expense (benefit) 23,742 (4,383) 19,359 Net income (loss) 85,157 (13,462) 71,695 Preferred stock dividends 14,459 — 14,459 Net income (loss) available to common shareholders $ 70,698 $ (13,462) $ 57,236 As of December 31, 2018 Goodwill and other intangibles $ 3,629 $ 12,870 $ 16,499 Total assets (2) $ 9,688,146 $ 145,279 $ 9,833,425 Total deposits $ 6,766,378 $ 375,858 $ 7,142,236 Total non-deposit liabilities (2) $ 1,719,225 $ 15,148 $ 1,734,373 (1) Amounts reported include funds transfer pricing of $8.8 million and $15.7 million for the years ended December 31, 2019 and 2018, respectively, credited to BankMobile for the value provided to the Customers Bank Business Banking segment for the use of excess low/no-cost deposits. (2) Amounts reported exclude inter-segment receivables/payables. For the Year Ended December 31, 2017 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Interest income (1) $ 359,931 $ 12,919 $ 372,850 Interest expense 105,438 69 105,507 Net interest income 254,493 12,850 267,343 Provision for loan and lease losses 5,638 1,130 6,768 Non-interest income 24,788 54,122 78,910 Non-interest expense 128,604 87,002 215,606 Income (loss) before income tax expense (benefit) 145,039 (21,160) 123,879 Income tax expense (benefit) 53,013 (7,971) 45,042 Net income (loss) 92,026 (13,189) 78,837 Preferred stock dividends 14,459 — 14,459 Net income (loss) available to common shareholders $ 77,567 $ (13,189) $ 64,378 As of December 31, 2017 Goodwill and other intangibles $ 3,630 $ 12,665 $ 16,295 Total assets (2) $ 9,769,996 $ 69,559 $ 9,839,555 Total deposits $ 6,400,310 $ 399,832 $ 6,800,142 Total non-deposit liabilities (2) $ 2,106,919 $ 11,530 $ 2,118,449 (1) Amounts reported include funds transfer pricing of $12.9 million for the year ended December 31, 2017, credited to BankMobile for the value provided to the Customers Bank Business Banking segment for the use of excess low/no-cost deposits. (2) Amounts reported exclude inter-segment receivables/payables.

Non-Interest Revenue (Tables)

Non-Interest Revenue (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Customers' revenue from contracts with customers within the scope of ASC 606 is recognized within non-interest income. The following tables present Customers' non-interest revenues affected by ASC 606 by business segment for the years ended December 31, 2019, 2018, and 2017: For the Year Ended December 31, 2019 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and card revenue $ 781 $ 28,160 $ 28,941 Deposit fees 1,742 11,073 12,815 University fees - card and disbursement fees — 1,008 1,008 Total revenue recognized at point in time 2,523 40,241 42,764 Revenue recognized over time: University fees - subscription revenue — 3,956 3,956 Total revenue recognized over time — 3,956 3,956 Total revenue from contracts with customers $ 2,523 $ 44,197 $ 46,720 For the Year Ended December 31, 2018 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and card revenue $ 794 $ 29,901 $ 30,695 Deposit fees 1,277 6,547 7,824 University fees - card and disbursement fees — 1,039 1,039 Total revenue recognized at point in time 2,071 37,487 39,558 Revenue recognized over time: University fees - subscription revenue — 3,681 3,681 Total revenue recognized over time — 3,681 3,681 Total revenue from contracts with customers $ 2,071 $ 41,168 $ 43,239 For the Year Ended December 31, 2017 (amounts in thousands) Customers Bank Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and card revenue $ 782 $ 40,727 $ 41,509 Deposit fees 1,190 8,849 10,039 University fees - card and disbursement fees — 1,141 1,141 Total revenue recognized at point in time 1,972 50,717 52,689 Revenue recognized over time: University fees - subscription revenue — 3,272 3,272 Total revenue recognized over time — 3,272 3,272 Total revenue from contracts with customers $ 1,972 $ 53,989 $ 55,961

Description of the Business - N

Description of the Business - Narrative (Detail)	Dec. 31, 2019Branch
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of branches	13

Significant Accounting Polici_3

Significant Accounting Policies and Basis of Presentation - Narrative (Detail) $ in Thousands	Jan. 01, 2020	Dec. 31, 2016Segment	Dec. 31, 2019USD ($)CompensationPlanderivativeSegmentSwap	Dec. 31, 2018USD ($)derivativeSwap	Dec. 31, 2017USD ($)	Dec. 31, 2014	Jan. 01, 2018USD ($)
Derivative [Line Items]
Average reserve balances required to be maintained with federal reserve bank			$ 69,100	$ 58,400
Contractual payment of principal duration (days)			90 days
Contractual terms for loans (months)			6 months
Maximum loan to value ratio			80.00%
Delinquency period for loan charge-offs (days)			120 days
Goodwill and other intangibles			$ 15,195	16,499	$ 16,295
FHLB, Federal Reserve Bank, and other restricted stock			84,214	89,685
Federal Home Loan Bank stock			$ 60,800	67,300
Percentage of tax position that will be realized or sustained upon examination			50.00%
Number of share-based compensation plans | CompensationPlan			4
Number of reportable segments (segment) | Segment		2	2
Collaborative arrangement, expense reimbursement			$ 7,700	8,400	2,400
Increase to loans and leases receivable allowance			$ 56,379	$ 39,972	$ 38,015
Accounting Standards Update 2016-01
Derivative [Line Items]
Cumulative effect adjustment							$ 0
Interest rate swaps | Not Designated as Hedging Instrument
Derivative [Line Items]
Number of interest rate swaps | Swap			140	98
Derivative notional amount			$ 1,400,000	$ 1,000,000
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Number of interest rate swaps | derivative			4	6
Derivative notional amount			$ 725,000	$ 750,000
Credit contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative notional amount			$ 167,100	$ 94,900
ESPP
Derivative [Line Items]
Purchase price under employee stock purchase plan (percent)			85.00%			85.00%
Purchase price under employee stock purchase plan, discount (percent)			15.00%			15.00%
Retained Earnings | Accounting Standards Update 2016-01
Derivative [Line Items]
Cumulative effect adjustment							1,041
Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2016-01
Derivative [Line Items]
Cumulative effect adjustment							$ (1,041)
Discounted cash flow | Fair Value Estimate
Derivative [Line Items]
Interest-only GNMA securities			$ 16,272
Subsequent Event | Accounting Standards Update 2016-13
Derivative [Line Items]
Phase-in period (years)	3 years

Earnings Per Share - Components

Earnings Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 23,911	$ 23,451	$ 5,681	$ 11,825	$ 14,247	$ 2,414	$ 20,048	$ 20,527	$ 64,868	$ 57,236	$ 64,378
Weighted-average number of common shares outstanding – basic (shares)									31,183,841	31,570,118	30,659,320
Share-based compensation plans (shares)									462,375	658,739	1,917,451
Warrants (shares)									0	4,241	19,906
Weighted-average number of common shares – diluted (shares)									31,646,216	32,233,098	32,596,677
Basic earnings per common share (usd per share)	$ 0.76	$ 0.75	$ 0.18	$ 0.38	$ 0.45	$ 0.08	$ 0.64	$ 0.65	$ 2.08	$ 1.81	$ 2.10
Diluted earnings per share (usd per share)	$ 0.75	$ 0.74	$ 0.18	$ 0.38	$ 0.44	$ 0.07	$ 0.62	$ 0.64	$ 2.05	$ 1.78	$ 1.97

Earnings Per Share - Antidiluti

Earnings Per Share - Antidilutive Securities (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based compensation awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (shares)	2,172,157	1,138,251	1,059,225

Changes In Accumulated Other _3

Changes In Accumulated Other Comprehensive Income (Loss) By Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 956,816	$ 920,964	$ 855,872
Unrealized gains (losses) arising during period, before tax	28,531	(44,074)
Income tax effect	(7,418)	11,460
Other comprehensive income (loss) before reclassifications	21,113	(32,614)
Reclassification adjustments for losses (gains) included in net income, before tax	406	15,742
Income tax effect	(106)	(4,093)
Amounts reclassified from accumulated other comprehensive income (loss) to net income	300	11,649
Net current-period other comprehensive income (loss)	21,413	(20,965)
Ending balance	1,052,795	956,816	920,964
Reclassification, cash flow hedge, before tax	(1,407)	2,917	(2,634)
Unrealized Gains (Losses), available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(21,741)	(249)
Balance after reclassification adjustments				$ (1,458)
Unrealized gains (losses) arising during period, before tax	49,688	(46,069)
Income tax effect	(12,919)	11,978
Other comprehensive income (loss) before reclassifications	36,769	(34,091)
Reclassification adjustments for losses (gains) included in net income, before tax	(1,001)	18,659
Income tax effect	260	(4,851)
Amounts reclassified from accumulated other comprehensive income (loss) to net income	(741)	13,808
Net current-period other comprehensive income (loss)	36,028	(20,283)
Ending balance	14,287	(21,741)	(249)
Foreign Currency Items, available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0	88
Balance after reclassification adjustments				0
Unrealized gains (losses) arising during period, before tax	0	0
Income tax effect	0	0
Other comprehensive income (loss) before reclassifications	0	0
Reclassification adjustments for losses (gains) included in net income, before tax	0	0
Income tax effect	0	0
Amounts reclassified from accumulated other comprehensive income (loss) to net income	0	0
Net current-period other comprehensive income (loss)	0	0
Ending balance	0	0	88
Total unrealized gains (losses), available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(21,741)	(161)
Balance after reclassification adjustments				(1,458)
Unrealized gains (losses) arising during period, before tax	49,688	(46,069)
Income tax effect	(12,919)	11,978
Other comprehensive income (loss) before reclassifications	36,769	(34,091)
Reclassification adjustments for losses (gains) included in net income, before tax	(1,001)	18,659
Income tax effect	260	(4,851)
Amounts reclassified from accumulated other comprehensive income (loss) to net income	(741)	13,808
Net current-period other comprehensive income (loss)	36,028	(20,283)
Ending balance	14,287	(21,741)	(161)
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(922)	(198)
Balance after reclassification adjustments				(240)
Unrealized gains (losses) arising during period, before tax	(21,157)	1,995
Income tax effect	5,501	(518)
Other comprehensive income (loss) before reclassifications	(15,656)	1,477
Reclassification adjustments for losses (gains) included in net income, before tax	1,407	(2,917)
Income tax effect	(366)	758
Amounts reclassified from accumulated other comprehensive income (loss) to net income	1,041	(2,159)
Net current-period other comprehensive income (loss)	(14,615)	(682)
Ending balance	(15,537)	(922)	(198)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(22,663)	(359)	(4,892)
Balance after reclassification adjustments				(1,698)
Ending balance	$ (1,250)	(22,663)	$ (359)
Non-interest income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Reclassification, cash flow hedge, after tax		70
Reclassification, cash flow hedge, before tax		95
Other non-interest income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Reclassification, cash flow hedge, after tax		2,100
Reclassification, cash flow hedge, before tax		$ 2,800
Accounting Standards Update 2018-02
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				0
Accounting Standards Update 2018-02 | Unrealized Gains (Losses), available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(256)
Accounting Standards Update 2018-02 | Foreign Currency Items, available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				0
Accounting Standards Update 2018-02 | Total unrealized gains (losses), available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(256)
Accounting Standards Update 2018-02 | Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(42)
Accounting Standards Update 2018-02 | Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(298)
Accounting Standards Update 2016-01
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				0
Accounting Standards Update 2016-01 | Unrealized Gains (Losses), available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(953)
Accounting Standards Update 2016-01 | Foreign Currency Items, available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(88)
Accounting Standards Update 2016-01 | Total unrealized gains (losses), available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(1,041)
Accounting Standards Update 2016-01 | Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				0
Accounting Standards Update 2016-01 | Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				(1,041)
Combined effect of multiple accounting pronouncements on components of shareholders' equity | Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect adjustment				$ (1,300)

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 557,891	$ 692,674
Gross Unrealized Gains	19,307	920
Gross Unrealized Losses	0	(30,300)
Fair Value	577,198	663,294
Equity securities	2,406	1,718
Total investment securities, at fair value	595,876	665,012
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	273,252	311,267
Gross Unrealized Gains	5,069	0
Gross Unrealized Losses	0	(5,893)
Fair Value	278,321	305,374
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	284,639	381,407
Gross Unrealized Gains	14,238	920
Gross Unrealized Losses	0	(24,407)
Fair Value	298,877	$ 357,920
Interest-only GNMA securities
Debt Securities, Available-for-sale [Line Items]
Interest-only GNMA securities	$ 16,272

Investment Securities - Narrati

Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2019USD ($)	Dec. 31, 2019USD ($)position	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Debt Securities, Available-for-sale [Line Items]
Loss upon acquisition of interest-only GNMA securities	$ 7,500	$ 7,476	$ 0	$ 0
Unrealized (gain) loss on investment securities		$ 1,299	(1,634)	$ 0
Number of available for sale debt securities in an unrealized loss position (position) | position		0
Pledged investment securities fair value		$ 20,400	$ 23,000
Interest-only GNMA securities
Debt Securities, Available-for-sale [Line Items]
Loss upon acquisition of interest-only GNMA securities		7,500
Interest-only GNMA securities		$ 16,272

Investment Securities - Stateme

Investment Securities - Statement of Proceeds from Sale of Available for Sale Investment Securities (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale of available for sale debt securities		$ 97,555	$ 476,182	$ 769,203
Gross gains		1,931	0	8,808
Gross losses		(930)	(18,659)	(8)
Net gains (losses)	$ (18,700)	$ 1,001	$ (18,659)	$ 8,800

Investment Securities - Summa_2

Investment Securities - Summary of Investment Securities by Stated Maturity (Detail) $ in Thousands	Dec. 31, 2019USD ($)
Debt Securities, Available-for-sale [Line Items]
Amortized cost, due in one year or less	$ 0
Amortized cost, due after one year through five years	15,000
Amortized cost, due after five years through ten years	267,639
Amortized cost, due after ten years	2,000
Total Debt Securities Amortized Cost	557,891
Fair value, due in one year or less	0
Fair value, due after one year through five years	15,206
Fair value, due after five years through ten years	281,607
Fair value, due after ten years	2,064
Total Debt Securities Fair Value	593,470
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities, amortized cost	273,252
Mortgage-backed securities, fair value	278,321
Interest-only GNMA securities
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities, amortized cost	0
Mortgage-backed securities, fair value	$ 16,272

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 615,410
Less Than 12 Months, Unrealized Losses	(30,300)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value	615,410
Unrealized Losses	(30,300)
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	310,036
Less Than 12 Months, Unrealized Losses	(24,407)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value	310,036
Unrealized Losses	(24,407)
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	305,374
Less Than 12 Months, Unrealized Losses	(5,893)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value	305,374
Unrealized Losses	$ (5,893)

Loans Held for Sale - Compositi

Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Receivables Held-for-sale [Abstract]
Multi-family loans, at lower of cost or fair value		$ 482,873	$ 0
Total commercial loans held for sale		482,873	0
Home equity conversion mortgages, at lower of cost or fair value		1,325	0
Residential mortgage loans, at fair value		2,130	1,507
Total consumer loans held for sale		3,455	1,507
Loans held for sale		486,328	1,507
Transfer of loans held for investment to held for sale	$ 499,800	$ 499,774	$ 0	$ 150,638

Loans and Leases Receivable a_3

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Schedule of Loans Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, mortgage warehouse, at fair value	$ 2,245,758	$ 1,405,420
Loans receivable	7,316,903	7,138,498
Deferred (fees) costs and unamortized (discounts) premiums, net	2,085	(424)
Allowance for loan and lease losses	(56,379)	(39,972)	$ (38,015)
Total loans and leases receivable, net of allowance for loan and lease losses	9,508,367	8,503,522
Mortgage Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, mortgage warehouse, at fair value	2,245,758	1,405,420
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,909,274	3,285,297
Allowance for loan and lease losses	(6,157)	(11,462)	(12,168)
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	118,418	56,491
Allowance for loan and lease losses	(1,262)	(624)	(979)
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	375,014	566,561
Allowance for loan and lease losses	(3,218)	(3,654)	(2,929)
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	70,398	79,731
Allowance for loan and lease losses	(1,060)	(145)	(180)
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,178,283	74,035
Allowance for loan and lease losses	(20,648)	(2,529)	$ (172)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	5,693,208	6,418,171
Commercial | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,909,274	3,285,297
Commercial | Commercial and industrial (including owner occupied commercial real estate)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,441,987	1,951,277
Commercial | Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,223,529	1,125,106
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	118,418	56,491
Commercial | Direct finance equipment leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	89,200	54,500
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,623,695	720,327
Consumer | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	375,014	566,561
Consumer | Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	70,398	79,731
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 1,178,283	$ 74,035

Loans and Leases Receivable a_4

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Narrative (Detail)	12 Months Ended
	Dec. 31, 2019USD ($)LoanCommitmentAllowance	Dec. 31, 2018USD ($)LoanCommitment	Dec. 31, 2017USD ($)CommitmentLoanAllowance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans held for sale, average life from purchase to sale (days)	30 days
Troubled debt restructurings loans	$ 13,300,000	$ 19,200,000	$ 20,400,000
Minimum performance requirement (months)	6 months
Sustained performance period (months)	6 months
Lease receivables restructured as a TDR	$ 0	$ 0	$ 0
Number of loans | Loan	28	41	40
Commitments to lend additional funds to debtors | Commitment	0	0	0
Number of TDR loans that defaulted on payments | Loan	4	4	5
Amount of TDR loans that defaulted on payments	$ 154,000	$ 92,000	$ 211,000
Allowance for TDR modification	$ 17,000		$ 1,000
TDR modification (allowance) | Allowance	15		1
Troubled Debt Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Sustained performance period (months)	9 months
Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Other real estate owned	$ 200,000	200,000
Foreclosure loans	900,000	$ 2,100,000
Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of TDR loans that defaulted on payments | Loan		1	1
Amount of TDR loans that defaulted on payments		$ 1,500,000	$ 2,100,000
Federal Home Loan Bank of Pittsburgh
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans pledged as collateral	$ 4,600,000,000	$ 5,400,000,000
Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	0	0	0

Loans and Leases Receivable a_5

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Loans by Type and Performance Status (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	$ 35,123	$ 15,551
Non-Accrual	20,021	27,494
Current	7,244,271	7,073,879
Total loans	$ 7,316,903	7,138,498
Due days for loan payments (days)	30 days
Delinquent period (days)	90 days
30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	$ 33,329	13,363
90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	1,794	2,188
Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	17,488	21,574
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	2,133	0
Non-Accrual	4,117	1,155
Current	1,901,336	3,282,452
Total loans	1,909,274	3,285,297
Multi-family | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	2,133	0
Multi-family | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Multi-family | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,688	1,690
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	2,395	1,914
Non-Accrual	4,531	17,764
Current	1,882,700	1,353,586
Total loans	1,889,980	1,373,800
Commercial and industrial | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	2,395	1,914
Commercial and industrial | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Commercial and industrial | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	354	536
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	5,388	193
Non-Accrual	1,963	1,037
Current	537,992	567,809
Total loans	552,007	577,477
Commercial real estate owner occupied | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	5,388	193
Commercial real estate owner occupied | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Commercial real estate owner occupied | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,664	8,438
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	8,034	1,190
Non-Accrual	76	129
Current	1,211,892	1,119,443
Total loans	1,223,529	1,125,106
Commercial real estate non-owner occupied | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	8,034	1,190
Commercial real estate non-owner occupied | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Commercial real estate non-owner occupied | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,527	4,344
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Non-Accrual	0	0
Current	118,418	56,491
Total loans	118,418	56,491
Construction | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Construction | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Construction | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	5,924	5,940
Non-Accrual	6,128	5,605
Current	359,491	550,679
Total loans	375,014	566,561
Residential real estate | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	5,924	5,940
Residential real estate | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Residential real estate | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,471	4,337
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	5,493	6,114
Non-Accrual	1,655	1,693
Current	61,649	69,916
Total loans	70,398	79,731
Cash	100	500
Manufactured housing | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	3,699	3,926
Manufactured housing | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	1,794	2,188
Manufactured housing | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,601	2,008
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	5,756	200
Non-Accrual	1,551	111
Current	1,170,793	73,503
Total loans	1,178,283	74,035
Other consumer | 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	5,756	200
Other consumer | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due Still Accruing	0	0
Other consumer | Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 183	$ 221

Loans and Leases Receivable a_6

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Schedule of Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 39,972	$ 38,015
Charge-offs	(9,590)	(4,757)
Recoveries	1,770	1,072
Provision for loan and lease losses	24,227	5,642
Ending Balance	56,379	39,972
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			$ 31,272	$ 39,118
Collectively evaluated for impairment			7,268,143	7,077,806
Loans receivable, at amortized cost or lower of cost or market			7,316,903	7,138,498
Individually evaluated for impairment			852	845
Collectively evaluated for impairment			52,901	36,249
Total allowance for loan losses	39,972	39,972	56,379	39,972
Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			17,488	21,574
Loans receivable, at amortized cost or lower of cost or market			17,488	21,574
Loans acquired with credit deterioration			2,626	2,878
Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	11,462	12,168
Charge-offs	(541)	0
Recoveries	7	0
Provision for loan and lease losses	(4,771)	(706)
Ending Balance	6,157	11,462
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			4,117	1,155
Collectively evaluated for impairment			1,903,469	3,282,452
Loans receivable, at amortized cost or lower of cost or market			1,909,274	3,285,297
Individually evaluated for impairment			0	539
Collectively evaluated for impairment			6,157	10,923
Total allowance for loan losses	11,462	11,462	6,157	11,462
Multi-family | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			1,688	1,690
Loans receivable, at amortized cost or lower of cost or market			1,688	1,690
Loans acquired with credit deterioration			0	0
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	12,145	10,918
Charge-offs	(532)	(1,722)
Recoveries	1,050	403
Provision for loan and lease losses	2,893	2,546
Ending Balance	15,556	12,145
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			4,591	17,828
Collectively evaluated for impairment			1,885,035	1,355,436
Loans receivable, at amortized cost or lower of cost or market			1,889,980	1,373,800
Individually evaluated for impairment			523	261
Collectively evaluated for impairment			14,768	11,516
Total allowance for loan losses	12,145	12,145	15,556	12,145
Commercial and industrial | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			354	536
Loans receivable, at amortized cost or lower of cost or market			354	536
Loans acquired with credit deterioration			265	368
Commercial real estate owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	3,320	3,232
Charge-offs	(119)	(747)
Recoveries	236	326
Provision for loan and lease losses	(1,202)	509
Ending Balance	2,235	3,320
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			1,976	1,069
Collectively evaluated for impairment			543,367	567,970
Loans receivable, at amortized cost or lower of cost or market			552,007	577,477
Individually evaluated for impairment			83	1
Collectively evaluated for impairment			2,113	3,319
Total allowance for loan losses	3,320	3,320	2,235	3,320
Commercial real estate owner occupied | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			6,664	8,438
Loans receivable, at amortized cost or lower of cost or market			6,664	8,438
Loans acquired with credit deterioration			39	0
Commercial real estate non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	6,093	7,437
Charge-offs	0	0
Recoveries	0	5
Provision for loan and lease losses	150	(1,349)
Ending Balance	6,243	6,093
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			76	129
Collectively evaluated for impairment			1,219,926	1,120,633
Loans receivable, at amortized cost or lower of cost or market			1,223,529	1,125,106
Individually evaluated for impairment			0	0
Collectively evaluated for impairment			4,361	4,161
Total allowance for loan losses	6,093	6,093	6,243	6,093
Commercial real estate non-owner occupied | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			3,527	4,344
Loans receivable, at amortized cost or lower of cost or market			3,527	4,344
Loans acquired with credit deterioration			1,882	1,932
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	624	979
Charge-offs	0	0
Recoveries	136	241
Provision for loan and lease losses	502	(596)
Ending Balance	1,262	624
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			0	0
Collectively evaluated for impairment			118,418	56,491
Loans receivable, at amortized cost or lower of cost or market			118,418	56,491
Individually evaluated for impairment			0	0
Collectively evaluated for impairment			1,262	624
Total allowance for loan losses	1,262	979	1,262	624
Construction | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			0	0
Loans receivable, at amortized cost or lower of cost or market			0	0
Loans acquired with credit deterioration			0	0
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	3,654	2,929
Charge-offs	(297)	(466)
Recoveries	27	76
Provision for loan and lease losses	(166)	1,115
Ending Balance	3,218	3,654
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			9,063	8,631
Collectively evaluated for impairment			362,480	553,593
Loans receivable, at amortized cost or lower of cost or market			375,014	566,561
Individually evaluated for impairment			44	41
Collectively evaluated for impairment			2,923	3,227
Total allowance for loan losses	3,654	3,654	3,218	3,654
Residential real estate | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			3,471	4,337
Loans receivable, at amortized cost or lower of cost or market			3,471	4,337
Loans acquired with credit deterioration			251	386
Manufactured housing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	145	180
Charge-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	915	(35)
Ending Balance	1,060	145
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			9,898	10,195
Collectively evaluated for impairment			58,899	67,528
Loans receivable, at amortized cost or lower of cost or market			70,398	79,731
Individually evaluated for impairment			129	3
Collectively evaluated for impairment			897	89
Total allowance for loan losses	145	145	1,060	145
Manufactured housing | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			1,601	2,008
Loans receivable, at amortized cost or lower of cost or market			1,601	2,008
Loans acquired with credit deterioration			34	53
Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,529	172
Charge-offs	(8,101)	(1,822)
Recoveries	314	21
Provision for loan and lease losses	25,906	4,158
Ending Balance	20,648	2,529
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment			1,551	111
Collectively evaluated for impairment			1,176,549	73,703
Loans receivable, at amortized cost or lower of cost or market			1,178,283	74,035
Individually evaluated for impairment			73	0
Collectively evaluated for impairment			20,420	2,390
Total allowance for loan losses	$ 20,648	$ 172	20,648	2,529
Other consumer | Purchased credit impaired loans
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Loans acquired with credit deterioration			183	221
Loans receivable, at amortized cost or lower of cost or market			183	221
Loans acquired with credit deterioration			$ 155	$ 139

Loans and Leases Receivable a_7

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, total	$ 31,272	$ 39,118
Unpaid principle balance, total	34,127	42,031
Related allowance	852	845
Average recorded investment, total	33,532	36,980	$ 36,177
Interest income recognized, total	2,588	1,671	1,293
Multi-family
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, with no related allowance recorded	4,117	0
Recorded investment net of charge offs, with an allowance recorded	0	1,155
Unpaid principal balance, with no related allowance recorded	4,117	0
Unpaid principal balance, with an allowance recorded	0	1,155
Related allowance	0	539
Average recorded investment, with no related allowance recorded	1,223	537	0
Average recorded investment, with an allowance recorded	231	231	0
Interest income recognized, with no related allowance recorded	239	8	0
Interest income recognized, with an allowance recorded	0	37	0
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, with no related allowance recorded	3,084	13,660
Recorded investment net of charge offs, with an allowance recorded	1,507	4,168
Unpaid principal balance, with no related allowance recorded	4,726	15,263
Unpaid principal balance, with an allowance recorded	1,507	4,351
Related allowance	523	261
Average recorded investment, with no related allowance recorded	7,439	8,831	8,865
Average recorded investment, with an allowance recorded	3,723	6,504	5,984
Interest income recognized, with no related allowance recorded	1,077	673	214
Interest income recognized, with an allowance recorded	64	25	230
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, with no related allowance recorded	1,109	1,037
Recorded investment net of charge offs, with an allowance recorded	867	32
Unpaid principal balance, with no related allowance recorded	1,880	1,766
Unpaid principal balance, with an allowance recorded	878	32
Related allowance	83	1
Average recorded investment, with no related allowance recorded	1,111	776	1,439
Average recorded investment, with an allowance recorded	278	443	882
Interest income recognized, with no related allowance recorded	55	19	70
Interest income recognized, with an allowance recorded	54	3	0
Commercial real estate non-owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, with no related allowance recorded	76	129
Unpaid principal balance, with no related allowance recorded	187	241
Average recorded investment, with no related allowance recorded	97	645	898
Interest income recognized, with no related allowance recorded	7	48	2
Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, with no related allowance recorded	4,559	4,842
Recorded investment net of charge offs, with an allowance recorded	4,504	3,789
Unpaid principal balance, with no related allowance recorded	4,861	5,128
Unpaid principal balance, with an allowance recorded	4,522	3,789
Related allowance	44	41
Average recorded investment, with no related allowance recorded	2,766	4,129	4,617
Average recorded investment, with an allowance recorded	2,523	4,566	3,307
Interest income recognized, with no related allowance recorded	129	151	24
Interest income recognized, with an allowance recorded	119	131	187
Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, with no related allowance recorded	4,169	10,027
Recorded investment net of charge offs, with an allowance recorded	5,729	168
Unpaid principal balance, with no related allowance recorded	4,169	10,027
Unpaid principal balance, with an allowance recorded	5,729	168
Related allowance	129	3
Average recorded investment, with no related allowance recorded	5,638	10,015	10,003
Average recorded investment, with an allowance recorded	3,792	214	131
Interest income recognized, with no related allowance recorded	325	561	558
Interest income recognized, with an allowance recorded	253	14	8
Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment net of charge offs, with no related allowance recorded	140	111
Recorded investment net of charge offs, with an allowance recorded	1,411
Unpaid principal balance, with no related allowance recorded	140	111
Unpaid principal balance, with an allowance recorded	1,411
Related allowance	73
Average recorded investment, with no related allowance recorded	4,127	89	51
Average recorded investment, with an allowance recorded	584
Interest income recognized, with no related allowance recorded	266	$ 1	$ 0
Interest income recognized, with an allowance recorded	$ 0

Loans and Leases Receivable a_8

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Schedule of Accruing and Nonaccrual TDRs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 1,437	$ 1,675	$ 8,071
Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	431	0	6,437
Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	83	352	0
Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	923	1,310	1,634
Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0	13	0
Accruing TDRs
Financing Receivable, Impaired [Line Items]
Recorded investment	11,251	11,624	12,021
Accruing TDRs | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	60	64	63
Accruing TDRs | Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	13	32	0
Accruing TDRs | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	2,935	3,026	3,828
Accruing TDRs | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	8,243	8,502	8,130
Accruing TDRs | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0	0	0
Nonaccrual TDRs
Financing Receivable, Impaired [Line Items]
Recorded investment	2,046	7,572	8,408
Nonaccrual TDRs | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	23	5,273	5,939
Nonaccrual TDRs | Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	0	0	0
Nonaccrual TDRs | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	631	667	703
Nonaccrual TDRs | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	1,382	1,620	1,766
Nonaccrual TDRs | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	10	12	0
Total
Financing Receivable, Impaired [Line Items]
Recorded investment	13,297	19,196	20,429
Total | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded investment	83	5,337	6,002
Total | Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	13	32	0
Total | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	3,566	3,693	4,531
Total | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded investment	9,625	10,122	9,896
Total | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 10	$ 12	$ 0

Loans and Leases Receivable a_9

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)Loan	Dec. 31, 2018USD ($)Loan	Dec. 31, 2017USD ($)Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	28	41	40
Recorded investment | $	$ 1,437	$ 1,675	$ 8,071
Extensions of maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	2	2	5
Recorded investment | $	$ 514	$ 60	$ 6,497
Interest-rate reductions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	26	39	35
Recorded investment | $	$ 923	$ 1,615	$ 1,574

Loans and Leases Receivable _10

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Summary of Loans and Leases Modified in Troubled Debt Restructurings and Recorded Investments (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)Loan	Dec. 31, 2018USD ($)Loan	Dec. 31, 2017USD ($)Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	28	41	40
Recorded investment | $	$ 1,437	$ 1,675	$ 8,071
Number of loans | Loan	4	4	5
Recorded investment | $	$ 154	$ 92	$ 211
Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	1	0	4
Recorded investment | $	$ 431	$ 0	$ 6,437
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	1	2	0
Recorded investment | $	$ 83	$ 352	$ 0
Number of loans | Loan	3	4	5
Recorded investment | $	$ 73	$ 92	$ 211
Manufactured housing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	26	38	36
Recorded investment | $	$ 923	$ 1,310	$ 1,634
Number of loans | Loan	1	0	0
Recorded investment | $	$ 81	$ 0	$ 0
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans | Loan	0	1	0
Recorded investment | $	$ 0	$ 13	$ 0

Loans and Leases Receivable _11

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Changes in Accretable Discount Related to Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield balance, beginning of period	$ 6,178	$ 7,825	$ 10,202
Accretion to interest income	(1,144)	(1,455)	(1,673)
Reclassification from nonaccretable difference and disposals, net	44	(192)	(704)
Accretable yield balance, end of period	$ 5,078	$ 6,178	$ 7,825

Loans and Leases Receivable _12

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Credit Quality Tables for Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 7,316,903	$ 7,138,498
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	5,442,307	6,181,911
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	111,157	126,180
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	139,744	110,080
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,597,188	700,664
Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	26,507	19,663
Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,909,274	3,285,297
Multi-family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,816,200	3,201,822
Multi-family | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	69,637	55,696
Multi-family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	23,437	27,779
Multi-family | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Multi-family | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,889,980	1,373,800
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,841,074	1,306,466
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	26,285	30,551
Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	22,621	36,783
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Commercial and industrial | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Commercial real estate owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	552,007	577,477
Commercial real estate owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	536,777	562,639
Commercial real estate owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	8,286	9,730
Commercial real estate owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	6,944	5,108
Commercial real estate owner occupied | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Commercial real estate owner occupied | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Commercial real estate non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,223,529	1,125,106
Commercial real estate non-owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,129,838	1,054,493
Commercial real estate non-owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	6,949	30,203
Commercial real estate non-owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	86,742	40,410
Commercial real estate non-owner occupied | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Commercial real estate non-owner occupied | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	118,418	56,491
Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	118,418	56,491
Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Construction | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Construction | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	375,014	566,561
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Residential real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	362,962	555,016
Residential real estate | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	12,052	11,545
Manufactured housing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	70,398	79,731
Manufactured housing | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Manufactured housing | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Manufactured housing | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Manufactured housing | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	63,250	71,924
Manufactured housing | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	7,148	7,807
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,178,283	74,035
Other consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Other consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Other consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Other consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,170,976	73,724
Other consumer | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 7,307	$ 311

Loans and Leases Receivable _13

Loans and Leases Receivable and Allowance for Loan and Lease Losses - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments to acquire loans receivable	$ 1,164,119	$ 398,468	$ 264,090
Value at the time of sale of loans	$ 268,872	$ 107,119	$ 458,192
Loans held-for-investment, purchase price as a percentage of loans outstanding	100.30%	99.90%	99.40%
Gain (loss) on sale of SBA and other loans	$ 2,770	$ 3,294	$ 4,223
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments to acquire loans receivable	105,858	368,402	264,090
Value at the time of sale of loans	230,285	0	191,574
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments to acquire loans receivable	1,058,261	30,066	0
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Value at the time of sale of loans	0	54,638	226,831
Commercial and industrial (including owner occupied commercial real estate)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Value at the time of sale of loans	22,267	32,263	19,974
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Value at the time of sale of loans	$ 16,320	$ 20,218	$ 19,813

Leases - Lessee Narrative (Deta

Leases - Lessee Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	15 years
Operating lease, right-of-use asset	$ 20,232
Present value of lease liabilities	21,358
Lessee, operating lease, lease not yet commenced, commitment amount	2,600
Operating lease, payments	$ 5,900
Operating leases, rent expense		$ 5,800	$ 5,200
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset				$ 23,800
Accrued rent				1,100
Present value of lease liabilities				$ 24,900
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	4 months
Lessee, operating lease, term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	8 years
Lessee, operating lease, term of contract	5 years

Leases - Right-of-Use Assets an

Leases - Right-of-Use Assets and Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
ASSETS
Operating lease ROU assets	$ 20,232
LIABILITIES
Operating lease liabilities	$ 21,358

Leases - Lease, Cost (Details)

Leases - Lease, Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Leases [Abstract]
Operating lease, cost	$ 5,823

Leases - Maturities of Non-canc

Leases - Maturities of Non-cancelable Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Leases [Abstract]
2020	$ 5,539
2021	4,792
2022	4,167
2023	3,174
2024	2,100
Thereafter	2,817
Total minimum payments	22,589
Less: interest	1,231
Present value of lease liabilities	$ 21,358

Leases - Summary of Lease Term

Leases - Summary of Lease Term and Discount Rate (Details)	Dec. 31, 2019
Leases [Abstract]
Operating lease, weighted average remaining lease term (years)	5 years
Operating lease, weighted average discount rate, percent	2.90%

Leases - Lessor Narrative (Deta

Leases - Lessor Narrative (Details) - Equipment	Dec. 31, 2019
Minimum
Lessor, Lease, Description [Line Items]
Lessor, direct financing lease, term of contract (years)	24 months
Maximum
Lessor, Lease, Description [Line Items]
Lessor, direct financing lease, term of contract (years)	120 months

Leases - Lessor, Lease Receivab

Leases - Lessor, Lease Receivables and Investment in Operating Leases and their Corresponding Balance Sheet Location (Details) $ in Thousands	Dec. 31, 2019USD ($)
Leases [Abstract]
Lease receivables	$ 91,762
Guaranteed residual assets	7,435
Unguaranteed residual assets	1,260
Deferred initial direct costs	721
Unearned income	(11,300)
Net investment in direct financing leases	89,878
Investment in operating leases	107,850
Accumulated depreciation	(14,251)
Deferred initial direct costs	1,052
Net investment in operating leases	94,651
Total lease assets	$ 184,529

Bank Premises and Equipment - C

Bank Premises and Equipment - Components of Bank Premises and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	$ 31,059	$ 30,290
Accumulated depreciation and amortization	(21,670)	(19,227)
Total	9,389	11,063
Leasehold improvements
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	$ 14,218	14,080
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	3 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	25 years
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	$ 6,333	7,110
Furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	5 years
Furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	10 years
IT equipment
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	$ 10,016	8,645
IT equipment | Minimum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	3 years
IT equipment | Maximum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	5 years
Automobiles
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	$ 492	$ 455
Automobiles | Minimum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	3 years
Automobiles | Maximum
Property, Plant and Equipment [Line Items]
Expected useful life (years)	5 years

Bank Premises and Equipment - N

Bank Premises and Equipment - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Depreciation, occupancy and amortization of leasehold improvement	$ 3.4	$ 2.7	$ 2.8

Deposits - Components of Deposi

Deposits - Components of Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deposits, by Component, Alternative [Abstract]
Demand, non-interest bearing	$ 1,343,391	$ 1,122,171
Demand, interest bearing	1,235,292	803,948
Savings, including money market deposit accounts	4,401,719	3,481,936
Time, $100,000 and over	402,161	792,370
Time, other	1,266,373	941,811
Total deposits	$ 8,648,936	$ 7,142,236	$ 6,800,142

Deposits - Schedule of Time Dep

Deposits - Schedule of Time Deposit Maturities (Detail) $ in Thousands	Dec. 31, 2019USD ($)
Banking and Thrift [Abstract]
2020	$ 1,467,088
2021	175,994
2022	19,489
2023	2,490
2024	3,473
Total time deposits	$ 1,668,534

Deposits - Narrative (Detail)

Deposits - Narrative (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Time deposits greater than $250,000	$ 200	$ 500
Brokered demand deposits	82.1	5.2
Brokered money market deposits	300	600
Brokered certificates of deposit	1,100	800
Demand deposit overdrafts reclassified as loans	$ 2.1	$ 3.4

Borrowings - Short Term Borrowi

Borrowings - Short Term Borrowings (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
FHLB advances	$ 500,000	$ 1,248,070
Federal funds purchased	538,000	187,000
Total short-term debt	$ 1,038,000	$ 1,435,070
FHLB advances, rate	2.15%	2.62%
Federal funds purchased, rate	1.60%	2.60%

Borrowings - Summary of Bancorp

Borrowings - Summary of Bancorps Short Term Borrowings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
FHLB Advances
Short-term Debt [Line Items]
Maximum outstanding at any month end	$ 1,190,150	$ 2,622,165	$ 2,283,250
Average balance during the year	$ 793,304	$ 1,526,180	$ 1,415,755
Weighted-average interest rate during the year	2.66%	2.05%	1.44%
Federal Funds Purchased
Short-term Debt [Line Items]
Maximum outstanding at any month end	$ 600,000	$ 195,000	$ 238,000
Average balance during the year	$ 271,400	$ 156,652	$ 163,466
Weighted-average interest rate during the year	2.28%	1.92%	1.19%

Borrowings - Narrative (Detail)

Borrowings - Narrative (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Federal Funds Purchased
Debt Instrument [Line Items]
Aggregate availability under federal funds line	$ 551	$ 522

Borrowings - FHLB and FRB Advan

Borrowings - FHLB and FRB Advances (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
FHLB advances	$ 350,000	$ 0
FHLB advances, interest rate	2.36%	0.00%
Total long-term debt	$ 350,000	$ 0
Total maximum borrowing capacity with the FHLB	3,445,416	4,146,899
Total maximum borrowing capacity with the FRB	136,842	102,461
Qualifying loans serving as collateral against FHLB and FRB advances	$ 4,496,983	$ 5,221,957

Borrowings - Long-term Debt (De

Borrowings - Long-term Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Borrowings, carrying amount	$ 350,000,000	$ 0
Senior Notes
Debt Instrument [Line Items]
Borrowings, carrying amount	123,630,000	123,871,000
Senior Subordinated Notes
Debt Instrument [Line Items]
Borrowings, carrying amount	181,115,000	108,977,000
Maturing September 2024 | Senior Notes
Debt Instrument [Line Items]
Borrowings, carrying amount	$ 24,432,000	0
Face amount, percentage	4.50%
Issue of subordinated term note	$ 25,000,000
Senior unsecured notes aggregate amount	$ 25,000,000
Redemption price, percent of principal balance	100.00%
Maturing June 2022 | Senior Notes
Debt Instrument [Line Items]
Borrowings, carrying amount	$ 99,198,000	98,911,000
Face amount, percentage	3.95%
Issue of subordinated term note	$ 100,000,000
Senior unsecured notes aggregate amount	$ 100,000,000
Redemption price, percent of principal balance	99.775%
Maturing June 2019 | Senior Notes
Debt Instrument [Line Items]
Borrowings, carrying amount	$ 0	24,960,000
Face amount, percentage	4.625%
Issue of subordinated term note	$ 25,000,000
Senior unsecured notes aggregate amount	$ 25,000,000
Redemption price, percent of principal balance	100.00%
Maturing December 2034 | Senior Subordinated Notes
Debt Instrument [Line Items]
Borrowings, carrying amount	$ 72,040,000	0
Face amount, percentage	5.375%
Issue of subordinated term note	$ 74,750,000
Senior unsecured notes aggregate amount	$ 74,750,000
Redemption price, percent of principal balance	100.00%
Maturing June 2029 | Senior Subordinated Notes
Debt Instrument [Line Items]
Borrowings, carrying amount	$ 109,075,000	$ 108,977,000
Face amount, percentage	6.125%
Issue of subordinated term note	$ 110,000,000
Senior unsecured notes aggregate amount	$ 110,000,000
Redemption price, percent of principal balance	100.00%
London Interbank Offered Rate (LIBOR) | Maturing June 2029 | Senior Subordinated Notes
Debt Instrument [Line Items]
Spread on variable interest rate	3.443%

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Detail)	1 Months Ended	12 Months Ended
	Jan. 31, 2019$ / sharesshares	Dec. 31, 2018$ / sharesshares	Dec. 31, 2017shares	Dec. 31, 2019series$ / shares	Nov. 30, 2013
Capital Unit [Line Items]
Percent of outstanding shares authorized for repurchase					5.00%
Premium percent over current book value					20.00%
Repurchase of common shares (shares) | shares	31,159	719,200	0
Weighted-average exercise price, outstanding (usd per share)	$ 18.35	$ 18.04
Number of preferred stock series outstanding | series				4
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share
Capital Unit [Line Items]
Preferred stock, redemption price (usd per share)				$ 25

Shareholders' Equity - Preferre

Shareholders' Equity - Preferred Stock and Dividends Paid Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Capital Unit [Line Items]
Preferred stock, shares issued	9,000,000	9,000,000
Preferred stock, carrying value	$ 217,471	$ 217,471
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share
Capital Unit [Line Items]
Preferred stock, shares issued	2,300,000	2,300,000
Preferred stock, carrying value	$ 55,569	$ 55,569
Preferred stock, fixed dividend rate	7.00%
Preferred stock, dividends paid (usd per share)	$ 1.75	$ 1.75	$ 1.75
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share | London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Preferred stock, floating dividend rate	5.30%
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share
Capital Unit [Line Items]
Preferred stock, shares issued	1,000,000	1,000,000
Preferred stock, carrying value	$ 24,108	$ 24,108
Preferred stock, fixed dividend rate	6.50%
Preferred stock, dividends paid (usd per share)	$ 1.63	$ 1.63	1.63
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share | London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Preferred stock, floating dividend rate	5.09%
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share
Capital Unit [Line Items]
Preferred stock, shares issued	2,300,000	2,300,000
Preferred stock, carrying value	$ 55,593	$ 55,593
Preferred stock, fixed dividend rate	6.45%
Preferred stock, dividends paid (usd per share)	$ 1.61	$ 1.61	1.61
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share | London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Preferred stock, floating dividend rate	5.14%
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share
Capital Unit [Line Items]
Preferred stock, shares issued	3,400,000	3,400,000
Preferred stock, carrying value	$ 82,201	$ 82,201
Preferred stock, fixed dividend rate	6.00%
Preferred stock, dividends paid (usd per share)	$ 1.50	$ 1.50	$ 1.50
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share | London Interbank Offered Rate (LIBOR)
Capital Unit [Line Items]
Preferred stock, floating dividend rate	4.762%

Employee Benefit Plans - Narrat

Employee Benefit Plans - Narrative (Detail)	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2019USD ($)year	Dec. 31, 2019USD ($)SERP_retirement_age	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Retirement Benefits [Abstract]
Employers matching contribution		50.00%
Employees first contribution		6.00%
401(k) profit sharing plan, employers matching contribution amount					$ 2,200,000	$ 2,100,000	$ 1,900,000
SERP annual retirement benefits period (years)	15 years
SERP retirement age			65	65
SERP target annual retirement benefit	$ 300,000	$ 300,000	$ 300,000	$ 300,000	300,000
SERP annual rate of return		7.00%
SERP present value of the amount owed	$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 5,500,000	$ 4,300,000

Share-Based Compensation Plan_2

Share-Based Compensation Plans - Narrative (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)yearshares	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum exercisable period for stock options (years)	10 years
Participant vested in an annual deferral accounts	100.00%
Involuntary termination age (year) | year	65
Aggregate number of shares of common stock available for grant (shares)	2,052,597
Employee stock purchase plan expense | $	$ 8,900	$ 8,600	$ 6,100
Nonvested awards, compensation cost not yet recognized | $	16,400
Cash received from exercise of options | $	$ 1,400
Restricted stock units, granted as long term incentive compensation (percent)	40.00%
Restricted stock units, vesting upon meeting certain thresholds (percent)	60.00%
Director | Voting Common Stock, par value $1.00 per share
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Voting common stock issued (shares)	37,467
Voting common stock issued | $	$ 800
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Number of shares granted (shares)	577,230
Options expiration date (years)	10 years
Tax benefit from exercise of options | $	$ 200
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vesting percentage per year	33.33%
Award vesting period (years)	3 years
Number of restricted stock units granted (shares)	177,627
Minimum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Maximum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	5 years
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued under plan (shares)	1,500,000
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fully diluted tangible book value	50.00%
Maximum number of shares that may be issued under 2010 plan (shares)	3,666,667
2004 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued under plan (shares)	2,750,000
BRRP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units outstanding (shares)	190,340
BRRP | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (shares)	5,447
BRRP | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Receipt deferral percentage under BRRP plan	25.00%
BRRP | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Receipt deferral percentage under BRRP plan	50.00%
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan expense | $	$ 170	$ 141	$ 132
Purchase price under employee stock purchase plan (percent)	85.00%			85.00%
Purchase price under employee stock purchase plan, discount (percent)	15.00%			15.00%
2004 and 2019 Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (shares)	172,180
Cliff | BRRP | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	5 years
Cliff | 2004 and 2019 Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Number of restricted stock units granted (shares)	48,142
Waterfall | 2004 and 2019 Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years

Share-Based Compensation Plan_3

Share-Based Compensation Plans - Statement of Weighted-Average Assumptions Used and Resulting Weighted-Average Fair Value of Option (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Payment Arrangement [Abstract]
Weighted-average risk-free interest rate	1.69%	2.87%	2.35%
Expected dividend yield	0.00%	0.00%	0.00%
Weighted-average expected volatility	29.92%	25.47%	25.05%
Weighted-average expected life (in years)	7 years	7 years	7 years
Weighted-average fair value of each option granted (usd per share)	$ 5.56	$ 10.05	$ 8.68

Share-Based Compensation Plan_4

Share-Based Compensation Plans - Summary of Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-average exercise price, outstanding (usd per share), beginning balance	$ 18.04
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares, outstanding, beginning balance (shares) | shares	2,520,526
Number of shares, granted (shares) | shares	577,230
Number of shares, exercised (shares) | shares	(82,500)
Number of shares, expired (shares) | shares	(90,000)
Number of shares, forfeited (shares) | shares	(95,008)
Number of shares, outstanding, ending balance (shares) | shares	2,830,248
Exercisable at December 31, 2019 (shares) | shares	766,739
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-average exercise price, outstanding (usd per share), beginning balance	$ 22.13
Weighted-average exercise price, issued (usd per share)	19.05
Weighted-average exercise price, exercised (usd per share)	16.79
Weighted-average exercise price, expired (usd per share)	25.19
Weighted-average exercise price, forfeited (usd per share)	21.19
Weighted-average exercise price, outstanding (usd per share), ending balance	21.59
Weighted-average exercise price, exercisable (usd per share)	$ 15.52
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted-average remaining contractual term in years, outstanding (years)	6 years 5 months 12 days
Weighted-average remaining contractual term in years, exercisable (years)	3 years 5 months 15 days
Aggregate intrinsic value, exercised | $	$ 341
Aggregate intrinsic value, outstanding | $	9,212
Aggregate intrinsic value, exercisable | $	$ 6,390

Share-Based Compensation Plan_5

Share-Based Compensation Plans - Summary of Non-Vested Options (Detail)	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Non-Vested Options
Options
Number of shares, outstanding, beginning balance (shares) | shares	1,671,223
Number of shares, granted (shares) | shares	577,230
Number of shares, forfeited (shares) | shares	(95,008)
Number of shares, outstanding, ending balance (shares) | shares	2,063,509
Weighted- Average exercise price
Weighted-average exercise price, outstanding (usd per share), beginning balance | $ / shares	$ 25.10
Weighted-average exercise price, granted (usd per share) | $ / shares	19.05
Weighted-average exercise price, forfeited (usd per share) | $ / shares	21.19
Weighted-average exercise price, outstanding (usd per share), ending balance | $ / shares	$ 23.85
Vested Options
Options
Number of shares, vested (shares) | shares	(89,936)
Weighted- Average exercise price
Weighted-average exercise price, vested (usd per share) | $ / shares	$ 19.33

Share-Based Compensation Plan_6

Share-Based Compensation Plans - Status of Restricted Stock (Detail) - Restricted Stock Units	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Restricted Stock Units
Restricted Stock Units, outstanding and unvested, beginning balance (shares) | shares	884,659
Restricted Stock Units, granted (shares) | shares	177,627
Restricted Stock Units, vested (shares) | shares	(281,905)
Restricted Stock Units, forfeited (shares) | shares	(62,700)
Restricted Stock Units, outstanding and unvested, ending balance (shares) | shares	717,681
Weighted- Average Grant- Date Fair Value
Weighted-average grant-date fair value, outstanding and unvested (usd per share), beginning balance | $ / shares	$ 23.99
Weighted-average grant-date fair value, granted (usd per share) | $ / shares	20.27
Weighted-average grant-date fair value, vested (usd per share) | $ / shares	23.22
Weighted-average grant-date fair value, forfeited (usd per share) | $ / shares	23.25
Weighted-average grant-date fair value, outstanding and unvested (usd per share), ending balance | $ / shares	$ 23.43

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
Federal									$ 2,973	$ 4,509	$ 24,258
State									5,304	5,547	5,666
Total deferred expense									8,277	10,056	29,924
Deferred
Federal									13,175	9,702	14,885
State									1,341	(399)	233
Total deferred expense									14,516	9,303	15,118
Effective income tax rate	$ 7,451	$ 8,020	$ 2,491	$ 4,831	$ 5,109	$ 28	$ 6,820	$ 7,402	$ 22,793	$ 19,359	$ 45,042

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income (Loss) Before Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amount
Federal income tax at statutory rate									$ 21,445	$ 19,121	$ 43,357
State income tax, net of federal benefit									5,249	4,067	3,835
Tax-exempt interest, net of disallowance									(385)	(360)	(381)
Bank-owned life insurance									(1,677)	(1,547)	(2,675)
Tax credits									(1,266)	(444)	0
Equity-based compensation									132	(547)	(10,741)
Non-deductible executive compensation									440	230	654
Unrecorded basis difference in foreign subsidiaries									(144)	343	4,527
Enactment of federal tax reform										(21)	5,505
Other									(1,001)	(1,483)	961
Effective income tax rate	$ 7,451	$ 8,020	$ 2,491	$ 4,831	$ 5,109	$ 28	$ 6,820	$ 7,402	$ 22,793	$ 19,359	$ 45,042
% of pretax income
Federal income tax at statutory rate									21.00%	21.00%	35.00%
State income tax, net of federal benefit									5.14%	4.47%	3.10%
Tax-exempt interest, net of disallowance									(0.38%)	(0.40%)	(0.31%)
Bank-owned life insurance									(1.64%)	(1.70%)	(2.16%)
Tax credits									(1.24%)	(0.49%)	0.00%
Equity-based compensation									0.13%	(0.60%)	(8.67%)
Non-deductible executive compensation									0.43%	0.25%	0.53%
Unrecorded basis difference in foreign subsidiaries									(0.14%)	0.38%	3.65%
Enactment of federal tax reform										(0.0002)	0.0444
Other									(0.98%)	(1.63%)	0.78%
Effective income tax rate									22.32%	21.26%	36.36%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Unrecognized tax benefits	$ 0	$ 0
Federal
Income Taxes [Line Items]
Net operating loss carryovers	4,800,000
State and Local Jurisdiction
Income Taxes [Line Items]
Net operating loss carryovers	$ 4,800,000

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Allowance for loan and lease losses	$ 14,616	$ 10,449
Net unrealized losses on securities	0	7,639
Net operating losses	1,494	1,212
Compensation and benefits	5,839	6,234
Cash flow hedge	5,557	324
Section 197 intangibles	1,196	923
Deferred income	1,182	640
Lease liability	5,523
Other	1,307	2,766
Total gross deferred tax assets	36,714	30,187
Less: valuation allowance	(486)	0
Net deferred tax assets	36,228	30,187
Deferred tax liabilities
Fair value adjustments on acquisitions	(506)	(569)
Bank premises and equipment	(6,074)	(884)
Tax qualified lease adjustments	(30,496)	(17,786)
Right of use asset	(5,232)
Net unrealized gains on securities	(5,020)	0
Other	(640)	(746)
Total deferred tax liabilities	(47,968)	(19,985)
Net deferred tax asset/(liability)	$ (11,740)
Net deferred tax asset/(liability)		$ 10,202

Transactions with Executive O_3

Transactions with Executive Officers, Directors, and Principal Shareholders - Schedule of Activity Relating to Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance as of December 31,	$ 5	$ 0	$ 238
Additions	47	27	99
Repayments	(52)	(22)	(337)
Balance as of December 31,	$ 0	$ 5	$ 0

Transactions with Executive O_4

Transactions with Executive Officers, Directors, and Principal Shareholders - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Percentage of gross revenue	5.00%
Percentage of aggregate amount of consolidated assets	5.00%
Director
Related Party Transaction [Line Items]
Related party deposits	$ 9.8	$ 15.3
Minimum
Related Party Transaction [Line Items]
Percentage of participation in equity	10.00%
Letter of Credit | Affiliated Entity
Related Party Transaction [Line Items]
Outstanding commitment	$ 0.5	$ 0.5

Financial Instruments with Of_3

Financial Instruments with Off-Balance-Sheet Risk - Schedule of Financial Instruments Outstanding Contract Amounts Represent Credit Risk (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments to fund loans and leases	$ 261,902	$ 345,608
Unfunded commitments to fund mortgage warehouse loans	1,378,364	1,537,900
Unfunded commitments under lines of credit and credit cards	1,065,474	867,131
Letters of credit	48,856	55,659
Other unused commitments	$ 2,736	$ 4,822

Regulatory Capital - Summary of

Regulatory Capital - Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 (to risk-weighted-assets), actual amount	$ 821,810	$ 745,795
Tier 1 capital (to risk-weighted assets), actual amount	1,039,281	963,266
Total capital (to risk-weighted assets), actual amount	1,256,309	1,081,962
Tier 1 capital (to average assets), actual amount	$ 1,039,281	$ 963,266
Common equity Tier 1 (to risk-weighted assets), actual ratio	7.984%	8.964%
Tier 1 capital (to risk-weighted assets), actual ratio	10.096%	11.578%
Total capital (to risk-weighted assets), actual ratio	12.205%	13.005%
Tier 1 capital (to average assets), actual ratio	9.258%	9.665%
Common equity Tier 1 (to risk-weighted assets), for capital adequacy purposes amount	$ 463,211	$ 374,388
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes amount	617,615	499,185
Total capital (to risk-weighted assets), for capital adequacy purposes amount	823,487	655,580
Tier 1 capital (to average assets), for capital adequacy purposes amount	$ 449,026	$ 398,668
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	6.00%	6.00%
Total capital (to risk-weighted assets), for capital adequacy purposes ratio	8.00%	8.00%
Tier 1 capital (to average assets), for capital adequacy purposes ratio	4.00%	4.00%
Common equity Tier 1 (to risk-weighted assets), for Basel III amount	$ 720,551	$ 530,384
Tier 1 (to risk-weighted assets), for Basel III amount	874,955	655,180
Total capital (to risk-weighted assets), for Basel III amount	1,080,827	821,575
Tier 1 capital (to average assets) for Basel III amount	$ 449,026	$ 398,668
Common equity Tier 1 (to risk-weighted assets), for Basel III ratio	7.00%	6.375%
Tier 1 capital (to risk-weighted assets), for Basel III ratio	8.50%	7.875%
Total capital (to risk-weighted assets), for Basel III ratio	10.50%	9.875%
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 (to risk-weighted-assets), actual amount	$ 1,164,652	$ 1,066,121
Tier 1 capital (to risk-weighted assets), actual amount	1,164,652	1,066,121
Total capital (to risk-weighted assets), actual amount	1,330,155	1,215,522
Tier 1 capital (to average assets), actual amount	$ 1,164,652	$ 1,066,121
Common equity Tier 1 (to risk-weighted assets), actual ratio	11.323%	12.822%
Tier 1 capital (to risk-weighted assets), actual ratio	11.323%	12.822%
Total capital (to risk-weighted assets), actual ratio	12.933%	14.619%
Tier 1 capital (to average assets), actual ratio	10.379%	10.699%
Common equity Tier 1 (to risk-weighted assets), for capital adequacy purposes amount	$ 462,842	$ 374,160
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes amount	617,122	498,879
Total capital (to risk-weighted assets), for capital adequacy purposes amount	822,829	665,173
Tier 1 capital (to average assets), for capital adequacy purposes amount	$ 448,851	$ 398,570
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	6.00%	6.00%
Total capital (to risk-weighted assets), for capital adequacy purposes ratio	8.00%	8.00%
Tier 1 capital (to average assets), for capital adequacy purposes ratio	4.00%	4.00%
Common equity Tier 1 (to risk-weighted assets), to be well capitalized under prompt correction action provisions amount	$ 668,549	$ 540,453
Tier 1 capital (to risk-weighted assets), to be well capitalized under prompt corrective action provisions amount	822,829	665,173
Total capital (to risk-weighted assets), to be well capitalized under prompt corrective action provisions amount	1,028,537	831,466
Tier 1 capital (to average assets), to be well capitalized under prompt corrective action provisions amount	$ 561,064	$ 498,212
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	8.00%	8.00%
Total capital (to risk-weighted assets), to be well capitalized under prompt corrective action provisions ratio	10.00%	10.00%
Tier 1 capital (to average assets), to be well capitalized under prompt corrective action provisions ratio	5.00%	5.00%
Common equity Tier 1 (to risk-weighted assets), for Basel III amount	$ 719,976	$ 530,059
Tier 1 (to risk-weighted assets), for Basel III amount	874,256	654,779
Total capital (to risk-weighted assets), for Basel III amount	1,079,964	821,072
Tier 1 capital (to average assets) for Basel III amount	$ 448,851	$ 398,570
Common equity Tier 1 (to risk-weighted assets), for Basel III ratio	7.00%	6.375%
Tier 1 capital (to risk-weighted assets), for Basel III ratio	8.50%	7.875%
Total capital (to risk-weighted assets), for Basel III ratio	10.50%	9.875%
Tier 1 capital (to average assets), for Basel III ratio	4.00%	4.00%

Regulatory Capital - Narrative

Regulatory Capital - Narrative (Details)	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Maximum buffer, percent of risk weighted assets for 2016	0.625%
Maximum buffer, percent of risk weighted assets for 2017	1.25%
Maximum buffer, percent of risk weighted assets for 2018	1.875%
Maximum buffer, percent of risk weighted assets for 2019 and thereafter	2.50%
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	6.00%		6.00%
Total capital (to risk-weighted assets), for capital adequacy purposes ratio	8.00%		8.00%
Capital conservation buffer, excess of minimum capital ratio				2.50%
Customers Bancorp, Inc.
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 (to risk-weighted assets), for capital adequacy purposes ratio		7.00%
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio		8.50%
Total capital (to risk-weighted assets), for capital adequacy purposes ratio		10.50%

Disclosures about Fair Value _3

Disclosures about Fair Value of Financial Instruments - Narrative (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, average life from purchase to sale (days)	30 days
Unrealized gain (loss) on investment securities	$ 1,299	$ (1,634)	$ 0
Interest-only GNMA securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on investment securities	600
Cash settlements	$ 1,500

Disclosures about Fair Value _4

Disclosures about Fair Value of Financial Instruments - Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets:
Cash and cash equivalents, carrying value	$ 212,505	$ 62,135
Cash and cash equivalents, fair value	212,505	62,135
Debt securities, available for sale	577,198	663,294
Interest-only GNMA securities	16,272
Equity securities	2,406	1,718
Loans held for sale, carrying value	486,328	1,507
Loans held for sale, fair value	486,328	1,507
Loans receivable, net of allowance for loan losses, carrying value	9,508,367	8,503,522
Loans receivable, net of allowance for loan losses, fair value	9,853,037	8,481,128
FHLB, Federal Reserve Bank and other restricted stock, carrying value	84,214	89,685
FHLB, Federal Reserve Bank and other restricted stock, fair value	84,214	89,685
Derivatives	23,608	14,693
Liabilities:
Deposits, carrying value	8,648,936	7,142,236	$ 6,800,142
Deposits, fair value	8,652,340	7,136,009
Federal funds purchased, carrying value	538,000	187,000
Federal funds purchased, fair value	538,000	187,000
FHLB advances, carrying value	850,000	1,248,070
FHLB advances, fair value	852,162	1,248,046
Other borrowings, carrying value	123,630	123,871
Other borrowings, fair value	127,603	121,718
Subordinated debt, carrying value	181,115	108,977
Subordinated debt, fair value	192,217	110,550
Derivatives	45,939	16,286
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents, fair value	212,505	62,135
Debt securities, available for sale	0	0
Interest-only GNMA securities	0
Equity securities	2,406	1,718
Loans held for sale, fair value	0	0
Loans receivable, net of allowance for loan losses, fair value	0	0
FHLB, Federal Reserve Bank and other restricted stock, fair value	0	0
Derivatives	0	0
Liabilities:
Deposits, fair value	6,980,402	5,408,055
Federal funds purchased, fair value	538,000	187,000
FHLB advances, fair value	0	998,070
Other borrowings, fair value	0	0
Subordinated debt, fair value	0	0
Derivatives	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents, fair value	0	0
Debt securities, available for sale	577,198	663,294
Interest-only GNMA securities	0
Equity securities	0	0
Loans held for sale, fair value	2,130	1,507
Loans receivable, net of allowance for loan losses, fair value	2,245,758	1,405,420
FHLB, Federal Reserve Bank and other restricted stock, fair value	84,214	89,685
Derivatives	23,529	14,624
Liabilities:
Deposits, fair value	1,671,938	1,727,954
Federal funds purchased, fair value	0	0
FHLB advances, fair value	852,162	249,976
Other borrowings, fair value	127,603	121,718
Subordinated debt, fair value	192,217	110,550
Derivatives	45,939	16,286
Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents, fair value	0	0
Debt securities, available for sale	0	0
Interest-only GNMA securities	16,272
Equity securities	0	0
Loans held for sale, fair value	484,198	0
Loans receivable, net of allowance for loan losses, fair value	7,607,279	7,075,708
FHLB, Federal Reserve Bank and other restricted stock, fair value	0	0
Derivatives	79	69
Liabilities:
Deposits, fair value	0	0
Federal funds purchased, fair value	0	0
FHLB advances, fair value	0	0
Other borrowings, fair value	0	0
Subordinated debt, fair value	0	0
Derivatives	$ 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 Non-recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Impaired loans reserve	$ 852	$ 845
Impaired loans, net of reserves
Assets
Impaired loans reserve	852	845
Fair Value, Measurements, Recurring
Assets
Assets	2,867,372	2,086,632
Fair Value, Measurements, Recurring | Interest-only GNMA securities
Assets
Assets	16,272
Fair Value, Measurements, Recurring | Equity securities
Assets
Assets	2,406	1,718
Fair Value, Measurements, Recurring | Derivatives
Assets
Assets	23,608	14,693
Liabilities
Liabilities	45,939	16,286
Fair Value, Measurements, Recurring | Loans held for sale – fair value option
Assets
Assets	2,130	1,507
Fair Value, Measurements, Recurring | Loans receivable, mortgage warehouse – fair value option
Assets
Assets	2,245,758	1,405,420
Fair Value, Measurements, Recurring | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Assets
Assets	278,321	305,374
Fair Value, Measurements, Recurring | Available-for-sale Securities | Corporate notes
Assets
Assets	298,877	357,920
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Assets	2,406	1,718
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest-only GNMA securities
Assets
Assets	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Assets
Assets	2,406	1,718
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivatives
Assets
Assets	0	0
Liabilities
Liabilities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale – fair value option
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans receivable, mortgage warehouse – fair value option
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Corporate notes
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Assets	2,848,615	2,084,845
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest-only GNMA securities
Assets
Assets	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Equity securities
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Derivatives
Assets
Assets	23,529	14,624
Liabilities
Liabilities	45,939	16,286
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Loans held for sale – fair value option
Assets
Assets	2,130	1,507
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Loans receivable, mortgage warehouse – fair value option
Assets
Assets	2,245,758	1,405,420
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Assets
Assets	278,321	305,374
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Corporate notes
Assets
Assets	298,877	357,920
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets
Assets	16,351	69
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Interest-only GNMA securities
Assets
Assets	16,272
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity securities
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Derivatives
Assets
Assets	79	69
Liabilities
Liabilities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Loans held for sale – fair value option
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Loans receivable, mortgage warehouse – fair value option
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities
Assets
Assets	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Corporate notes
Assets
Assets	0	0
Fair Value, Measurements, Nonrecurring
Assets
Assets	14,350	11,497
Fair Value, Measurements, Nonrecurring | Impaired loans, net of reserves
Assets
Assets	14,272	10,876
Fair Value, Measurements, Nonrecurring | Other real estate owned
Assets
Assets	78	621
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Assets	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans, net of reserves
Assets
Assets	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other real estate owned
Assets
Assets	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Assets
Assets	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Impaired loans, net of reserves
Assets
Assets	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Other real estate owned
Assets
Assets	0	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Assets
Assets	14,350	11,497
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Impaired loans, net of reserves
Assets
Assets	14,272	10,876
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Other real estate owned
Assets
Assets	$ 78	$ 621

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) - Fair Value, Measurements, Recurring - Significant Unobservable Inputs (Level 3) - Residential Mortgage [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at December 31,	$ 69	$ 60
Issuances	451	407
Settlements	(441)	(398)
Balance at December 31,	$ 79	$ 69

Disclosures about Fair Value _7

Disclosures about Fair Value of Financial Instruments - Summary of Financial Assets and Financial Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value Estimate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments	$ 79
Fair Value Estimate | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	78	$ 621
Fair Value Estimate | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest-only GNMA securities	16,272
Fair Value Estimate | Adjusted market bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments		$ 69
Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range		8.00%
Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range		26.00%
Interest-only GNMA securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest-only GNMA securities	$ 16,272
Interest-only GNMA securities | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	12.00%
Other real estate owned | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	9.00%	8.00%
Mortgages | Adjusted market bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments pull through rate	85.00%	90.00%
Minimum | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range		8.00%
Minimum | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range		8.00%
Minimum | Interest-only GNMA securities | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	9.00%
Minimum | Other real estate owned | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	8.00%	8.00%
Minimum | Mortgages | Adjusted market bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments pull through rate	85.00%	90.00%
Maximum | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range		8.00%
Maximum | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range		50.00%
Maximum | Interest-only GNMA securities | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	14.00%
Maximum | Other real estate owned | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	9.00%	8.00%
Maximum | Mortgages | Adjusted market bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments pull through rate	85.00%	90.00%
Real estate | Fair Value Estimate | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 12,767	$ 10,260
Real estate | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	8.00%
Real estate | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	37.00%
Real estate | Minimum | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	8.00%
Real estate | Minimum | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	34.00%
Real estate | Maximum | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	10.00%
Real estate | Maximum | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	45.00%
Commercial and industrial | Fair Value Estimate | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 1,505	$ 616
Commercial and industrial | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	22.00%
Commercial and industrial | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	8.00%
Commercial and industrial | Minimum | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	8.00%
Commercial and industrial | Minimum | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	8.00%
Commercial and industrial | Maximum | Impaired loans | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	50.00%
Commercial and industrial | Maximum | Impaired loans | Business Asset Valuation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement range	8.00%

Derivative Instruments And He_3

Derivative Instruments And Hedging Activities - Narrative (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)Swapderivative	Dec. 31, 2018USD ($)derivativeSwap
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification from AOCI to interest expense	$ 6,200
Period for hedging exposure to the variability in future cash flows for forecasted transactions	54 months
Derivative, net liability position, fair value	$ 46,400
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral pledged	$ 45,727	$ 702
Not Designated as Hedging Instrument | Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period	30 days
Not Designated as Hedging Instrument | Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period	60 days
Not Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate swaps | Swap	140	98
Derivative notional amount	$ 1,400,000	$ 1,000,000
Not Designated as Hedging Instrument | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate swaps | Swap	4	0
Derivative notional amount	$ 78,600
Not Designated as Hedging Instrument | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	4,500	$ 3,600
Not Designated as Hedging Instrument | Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	$ 167,100	$ 94,900
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate swaps | derivative	4	6
Derivative notional amount	$ 725,000	$ 750,000

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	$ 432	$ 7,529
Fair value, derivative liabilities	45,727	9,077
Designated as Hedging Instrument | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	0	256
Designated as Hedging Instrument | Other assets | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	0	256
Designated as Hedging Instrument | Other liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	21,374	1,502
Designated as Hedging Instrument | Other liabilities | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	21,374	1,502
Not Designated as Hedging Instrument | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	23,608	14,437
Not Designated as Hedging Instrument | Other assets | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	23,301	14,300
Not Designated as Hedging Instrument | Other assets | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	9
Not Designated as Hedging Instrument | Other assets | Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	219	68
Not Designated as Hedging Instrument | Other assets | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative assets	79	69
Not Designated as Hedging Instrument | Other liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	24,565	14,784
Not Designated as Hedging Instrument | Other liabilities | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	24,797	14,730
Not Designated as Hedging Instrument | Other liabilities | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	9
Not Designated as Hedging Instrument | Other liabilities | Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	(241)	54
Not Designated as Hedging Instrument | Other liabilities | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Fair value, derivative liabilities	$ 0	$ 0

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Effect of Derivative Instruments on Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ (1,407)	$ 2,917	$ (2,634)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	(15,656)	1,477	406
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(1,407)	2,917	(2,634)
Interest expense | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(1,407)	95	(2,634)
Other non-interest income | Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	0	2,822	0
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative, net	3,172	3,545	790
Not Designated as Hedging Instrument | Other non-interest income | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative, net	2,549	3,409	604
Not Designated as Hedging Instrument | Other non-interest income | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative, net	24	0	0
Not Designated as Hedging Instrument | Other non-interest income | Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative, net	589	127	171
Not Designated as Hedging Instrument | Mortgage banking income | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative, net	$ 10	$ 9	$ 15

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Assets and Derivative Assets (Detail) - Interest rate swaps - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	$ 432	$ 7,529
Financial Instruments	0	0
Cash Collateral Received/(Posted)	0	1,860
Net Amount	$ 432	$ 5,669

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Liabilities and Derivative Liabilities (Detail) - Interest rate swaps - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Offsetting Liabilities [Line Items]
Gross Amount of Recognized  Liabilities	$ 45,727	$ 9,077
Financial Instruments	0	0
Cash Collateral Received/(Posted)	(45,727)	(702)
Net Amount	$ 0	$ 8,375

Loss Contingencies - Narrative

Loss Contingencies - Narrative (Details) - USD ($) $ in Millions	Dec. 12, 2019	Jun. 21, 2019	Dec. 31, 2019
Bureau of the Fiscal Service
Loss Contingencies [Line Items]
Loss contingency, damages sought, value		$ 5.4
Halbreiner Matter
Loss Contingencies [Line Items]
Payments for legal settlements	$ 1
United States Department of Education Matter
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss			$ 6.5
Legal reserve			1
Minimum | United States Department of Education Matter
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss			1
Maximum | United States Department of Education Matter
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss			$ 3

Condensed Financial Statement_3

Condensed Financial Statements of Parent Company - Summary of Condensed Balance Sheets of Parent Company (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash in subsidiary bank	$ 212,505	$ 62,135
Other assets	298,052	185,672
Total assets	11,520,717	9,833,425	$ 9,839,555
LIABILITIES AND SHAREHOLDERS’ EQUITY
Other borrowings	123,630	123,871
Total liabilities	10,467,922	8,876,609
Shareholders' equity	1,052,795	956,816	$ 920,964	$ 855,872
Total liabilities and shareholders’ equity	11,520,717	9,833,425
Customers Bancorp
ASSETS
Cash in subsidiary bank	62,643	16,684
Other assets	6,583	3,417
Total assets	1,249,798	1,081,490
LIABILITIES AND SHAREHOLDERS’ EQUITY
Other borrowings	195,670	123,871
Other liabilities	1,333	803
Total liabilities	197,003	124,674
Shareholders' equity	1,052,795	956,816
Total liabilities and shareholders’ equity	1,249,798	1,081,490
Bank Subsidiaries
ASSETS
Investments in and receivables due from bank subsidiary	1,178,166	1,059,671
Non-Bank Subsidiaries
ASSETS
Investments in and receivables due from bank subsidiary	$ 2,406	$ 1,718

Condensed Financial Statement_4

Condensed Financial Statements of Parent Company - Summary of Condensed Income Statements of Parent Company (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating expense:
Interest	$ 46,402	$ 50,983	$ 47,271	$ 41,771	$ 41,779	$ 46,044	$ 40,317	$ 31,933	$ 186,429	$ 160,074	$ 105,507
Income tax benefit	(7,451)	(8,020)	(2,491)	(4,831)	(5,109)	(28)	(6,820)	(7,402)	(22,793)	(19,359)	(45,042)
Net income	27,526	27,066	9,296	15,440	17,862	6,029	23,663	24,142	79,327	71,695	78,837
Preferred stock dividends	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	14,459	14,459	14,459
Net income available to common shareholders	$ 23,911	$ 23,451	$ 5,681	$ 11,825	$ 14,247	$ 2,414	$ 20,048	$ 20,527	64,868	57,236	64,378
Comprehensive income									100,740
Customers Bancorp
Operating income:
Other, including dividends from bank subsidiary									70,000	45,422	38,200
Total operating income									70,000	45,422	38,200
Operating expense:
Interest									5,425	8,178	7,984
Other									744	1,722	1,742
Total operating expense									6,169	9,900	9,726
Income before taxes and undistributed income of subsidiaries									63,831	35,522	28,474
Income tax benefit									1,391	2,335	3,620
Income before undistributed income of subsidiaries									65,222	37,857	32,094
Equity in undistributed income of subsidiaries									14,105	33,838	46,743
Net income									79,327	71,695	78,837
Preferred stock dividends									14,459	14,459	14,459
Net income available to common shareholders									64,868	57,236	64,378
Comprehensive income									$ 100,740	$ 50,730	$ 83,370

Condensed Financial Statement_5

Condensed Financial Statements of Parent Company - Summary of Condensed Statements of Cash Flows of Parent Company (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities:
Net income	$ 27,526	$ 27,066	$ 9,296	$ 15,440	$ 17,862	$ 6,029	$ 23,663	$ 24,142	$ 79,327	$ 71,695	$ 78,837
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in other assets									(84,141)	(34,614)	(32,256)
Increase (decrease) in other liabilities									15,002	9,881	(16,687)
Net Cash Provided by (Used in) Operating Activities									78,280	97,474	62,193
Cash Flows from Investing Activities
Net Cash Used in Investing Activities									(1,444,435)	(104,098)	(565,125)
Cash Flows from Financing Activities
Proceeds from issuance of common stock									2,150	3,585	2,716
Proceeds from issuance of subordinated long-term debt									72,030	0	0
Proceed from issuance of other long-term borrowings									24,477	0	98,564
Repayments of other borrowings									(25,000)	(63,250)	0
Exercise and redemption of warrants									0	112	1,059
Purchase of treasury stock									(571)	(12,976)	0
Payments of employee taxes withheld from share-based awards									(1,732)	(880)	(14,761)
Preferred stock dividends paid									(14,459)	(14,459)	(14,459)
Net Cash Provided by (Used in) Financing Activities									1,516,525	(77,564)	384,546
Net Increase (Decrease) in Cash and Cash Equivalents									150,370	(84,188)	(118,386)
Cash and Cash Equivalents – Beginning				62,135				146,323	62,135	146,323	264,709
Cash and Cash Equivalents – Ending	212,505				62,135				212,505	62,135	146,323
Customers Bancorp
Cash Flows from Operating Activities:
Net income									79,327	71,695	78,837
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in undistributed earnings of subsidiaries, net of dividends received from Bank									(14,105)	(33,838)	(46,743)
(Increase) decrease in other assets									(3,166)	(256)	7,624
Increase (decrease) in other liabilities									1,775	(251)	(1,322)
Net Cash Provided by (Used in) Operating Activities									63,831	37,350	38,396
Cash Flows from Investing Activities
Payments for investments in and advances to subsidiaries									(74,767)	(29)	(98,725)
Net Cash Used in Investing Activities									(74,767)	(29)	(98,725)
Cash Flows from Financing Activities
Proceeds from issuance of common stock									2,150	3,585	2,716
Proceeds from issuance of subordinated long-term debt									72,030	0	0
Proceed from issuance of other long-term borrowings									24,477	0	98,564
Repayments of other borrowings									(25,000)	(63,250)	0
Exercise and redemption of warrants									0	112	1,059
Purchase of treasury stock									(571)	(12,976)	0
Payments of employee taxes withheld from share-based awards									(1,732)	(880)	(14,761)
Preferred stock dividends paid									(14,459)	(14,459)	(14,459)
Net Cash Provided by (Used in) Financing Activities									56,895	(87,868)	73,119
Net Increase (Decrease) in Cash and Cash Equivalents									45,959	(50,547)	12,790
Cash and Cash Equivalents – Beginning				$ 16,684				$ 67,231	16,684	67,231	54,441
Cash and Cash Equivalents – Ending	$ 62,643				$ 16,684				$ 62,643	$ 16,684	$ 67,231

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 123,995	$ 126,718	$ 111,950	$ 101,075	$ 103,303	$ 110,045	$ 107,639	$ 96,964	$ 463,739	$ 417,951	$ 372,850
Interest expense	46,402	50,983	47,271	41,771	41,779	46,044	40,317	31,933	186,429	160,074	105,507
Net interest income	77,593	75,735	64,679	59,304	61,524	64,001	67,322	65,031	277,310	257,877	267,343
Provision for loan and lease losses	9,689	4,426	5,346	4,767	1,385	2,924	(784)	2,117	24,227	5,642	6,768
Non-interest income	25,813	23,369	12,036	19,718	19,877	2,084	16,127	20,910	80,938	58,998	78,910
Non-interest expenses	58,740	59,592	59,582	53,984	57,045	57,104	53,750	52,280	231,901	220,179	215,606
Income before income tax expense	34,977	35,086	11,787	20,271	22,971	6,057	30,483	31,544	102,120	91,054	123,879
Provision for income taxes	7,451	8,020	2,491	4,831	5,109	28	6,820	7,402	22,793	19,359	45,042
Net income	27,526	27,066	9,296	15,440	17,862	6,029	23,663	24,142	79,327	71,695	78,837
Preferred stock dividends	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	14,459	14,459	14,459
Net income available to common shareholders	$ 23,911	$ 23,451	$ 5,681	$ 11,825	$ 14,247	$ 2,414	$ 20,048	$ 20,527	$ 64,868	$ 57,236	$ 64,378
Earnings per common share:
Basic earnings per share (usd per share)	$ 0.76	$ 0.75	$ 0.18	$ 0.38	$ 0.45	$ 0.08	$ 0.64	$ 0.65	$ 2.08	$ 1.81	$ 2.10
Diluted earnings per share (usd per share)	$ 0.75	$ 0.74	$ 0.18	$ 0.38	$ 0.44	$ 0.07	$ 0.62	$ 0.64	$ 2.05	$ 1.78	$ 1.97
Loss upon acquisition of interest-only GNMA securities			$ 7,500						$ 7,476	$ 0	$ 0
Loss on sale of investment securities						$ (18,700)			$ 1,001	$ (18,659)	$ 8,800

Business Segments (Details)

Business Segments (Details) $ in Thousands	3 Months Ended								6 Months Ended	12 Months Ended
	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2016Segment	Dec. 31, 2019USD ($)Segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (segment) | Segment									2	2
Effective income tax rate										22.32%	21.26%	36.36%
Interest income	$ 123,995	$ 126,718	$ 111,950	$ 101,075	$ 103,303	$ 110,045	$ 107,639	$ 96,964		$ 463,739	$ 417,951	$ 372,850
Interest	46,402	50,983	47,271	41,771	41,779	46,044	40,317	31,933		186,429	160,074	105,507
Net interest income	77,593	75,735	64,679	59,304	61,524	64,001	67,322	65,031		277,310	257,877	267,343
Provision for loan and lease losses	9,689	4,426	5,346	4,767	1,385	2,924	(784)	2,117		24,227	5,642	6,768
Non-interest income	25,813	23,369	12,036	19,718	19,877	2,084	16,127	20,910		80,938	58,998	78,910
Non-interest expenses	58,740	59,592	59,582	53,984	57,045	57,104	53,750	52,280		231,901	220,179	215,606
Income before income tax expense	34,977	35,086	11,787	20,271	22,971	6,057	30,483	31,544		102,120	91,054	123,879
Income tax expense	7,451	8,020	2,491	4,831	5,109	28	6,820	7,402		22,793	19,359	45,042
Net income	27,526	27,066	9,296	15,440	17,862	6,029	23,663	24,142		79,327	71,695	78,837
Preferred stock dividends	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615		14,459	14,459	14,459
Net income available to common shareholders	23,911	$ 23,451	$ 5,681	$ 11,825	14,247	$ 2,414	$ 20,048	$ 20,527		64,868	57,236	64,378
Goodwill and other intangibles	15,195				16,499					15,195	16,499	16,295
Total assets	11,520,717				9,833,425					11,520,717	9,833,425	9,839,555
Total deposits	8,648,936				7,142,236					8,648,936	7,142,236	6,800,142
Total non-deposit Liabilities	1,818,986				1,734,373					$ 1,818,986	$ 1,734,373	$ 2,118,449
Operating Segments | Customers Bank Business Banking
Segment Reporting Information [Line Items]
Effective income tax rate										22.55%	24.56%	37.67%
Interest income										$ 422,094	$ 400,948	$ 359,931
Interest										185,513	159,674	105,438
Net interest income										236,581	241,274	254,493
Provision for loan and lease losses										10,091	2,928	5,638
Non-interest income										35,268	17,499	24,788
Non-interest expenses										153,333	146,946	128,604
Income before income tax expense										108,425	108,899	145,039
Income tax expense										24,215	23,742	53,013
Net income										84,210	85,157	92,026
Preferred stock dividends										14,459	14,459	14,459
Net income available to common shareholders										69,751	70,698	77,567
Goodwill and other intangibles	3,629				3,629					3,629	3,629	3,630
Total assets	10,990,550				9,688,146					10,990,550	9,688,146	9,769,996
Total deposits	8,247,836				6,766,378					8,247,836	6,766,378	6,400,310
Total non-deposit Liabilities	1,789,329				1,719,225					1,789,329	1,719,225	2,106,919
Operating Segments | BankMobile
Segment Reporting Information [Line Items]
Interest income										41,645	17,003	12,919
Interest										916	400	69
Net interest income										40,729	16,603	12,850
Provision for loan and lease losses										14,136	2,714	1,130
Non-interest income										45,670	41,499	54,122
Non-interest expenses										78,568	73,233	87,002
Income before income tax expense										(6,305)	(17,845)	(21,160)
Income tax expense										(1,422)	(4,383)	(7,971)
Net income										(4,883)	(13,462)	(13,189)
Preferred stock dividends										0	0	0
Net income available to common shareholders										(4,883)	(13,462)	(13,189)
Goodwill and other intangibles	11,566				12,870					11,566	12,870	12,665
Total assets	530,167				145,279					530,167	145,279	69,559
Total deposits	401,100				375,858					401,100	375,858	399,832
Total non-deposit Liabilities	$ 29,657				$ 15,148					29,657	15,148	11,530
Segment Reconciling Items
Segment Reporting Information [Line Items]
Interest income										$ 8,800	$ 15,700	$ 12,900

Non-Interest Revenues - Narrati

Non-Interest Revenues - Narrative (Details) - BankMobile	12 Months Ended
	Dec. 31, 2019
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with customer, timing of satisfaction of performance obligation and payment	three
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with customer, timing of satisfaction of performance obligation and payment	five

Non-Interest Revenues - Non-Int

Non-Interest Revenues - Non-Interest Revenue by Business (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 46,720	$ 43,239	$ 55,961
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	42,764	39,558	52,689
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,956	3,681	3,272
Interchange and card revenue
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	28,941	30,695	41,509
Interchange and card revenue | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	28,941	30,695	41,509
Deposit fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12,815	7,824	10,039
Deposit fees | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12,815	7,824	10,039
University fees - card and disbursement fees | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,008	1,039	1,141
University fees - subscription revenue | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,956	3,681	3,272
Customers Bank Business Banking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,523	2,071	1,972
Customers Bank Business Banking | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,523	2,071	1,972
Customers Bank Business Banking | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Customers Bank Business Banking | Interchange and card revenue | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	781	794	782
Customers Bank Business Banking | Deposit fees | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,742	1,277	1,190
Customers Bank Business Banking | University fees - card and disbursement fees | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Customers Bank Business Banking | University fees - subscription revenue | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
BankMobile
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	44,197	41,168	53,989
BankMobile | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	40,241	37,487	50,717
BankMobile | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,956	3,681	3,272
BankMobile | Interchange and card revenue | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	28,160	29,901	40,727
BankMobile | Deposit fees | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	11,073	6,547	8,849
BankMobile | University fees - card and disbursement fees | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,008	1,039	1,141
BankMobile | University fees - subscription revenue | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 3,956	$ 3,681	$ 3,272

Uncategorized Items - cubi-2019

Label	Element	Value
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 298,000