Customers Bancorp (CUBI) 10-Q 9 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	CUBI
Entity Registrant Name	Customers Bancorp, Inc.
Entity Central Index Key	1,488,813
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		31,669,839

Consolidated Balance Sheet - Un

Consolidated Balance Sheet - Unaudited - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 22,969	$ 20,388
Interest-earning deposits	228,757	125,935
Cash and cash equivalents	251,726	146,323
Investment securities, at fair value	1,161,000	471,371
Loans held for sale (includes $1,931,781 and $1,795,294, respectively, at fair value)	1,931,781	1,939,485
Loans receivable	7,181,726	6,768,258
Allowance for loan losses	(38,288)	(38,015)
Total loans receivable, net of allowance for loan losses	7,143,438	6,730,243
FHLB, Federal Reserve Bank, and other restricted stock	136,066	105,918
Accrued interest receivable	33,956	27,021
Bank premises and equipment, net	11,224	11,955
Bank-owned life insurance	261,121	257,720
Other real estate owned	1,705	1,726
Goodwill and other intangibles	17,150	16,295
Other assets	143,679	131,498
Total assets	11,092,846	9,839,555
Deposits:
Demand, non-interest bearing	1,090,744	1,052,115
Interest-bearing	6,205,210	5,748,027
Total deposits	7,295,954	6,800,142
Federal funds purchased	105,000	155,000
FHLB advances	2,389,797	1,611,860
Other borrowings	186,888	186,497
Subordinated debt	108,929	108,880
Accrued interest payable and other liabilities	70,051	56,212
Total liabilities	10,156,619	8,918,591
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 June 30, 2018 and December 31, 2017	217,471	217,471
Common stock, par value $1.00 per share; 200,000,000 shares authorized; 32,199,903 and 31,912,763 shares issued as of June 30, 2018 and December 31, 2017; 31,669,643 and 31,382,503 shares outstanding as of June 30, 2018 and December 31, 2017	32,200	31,913
Additional paid in capital	428,796	422,096
Retained earnings	299,990	258,076
Accumulated other comprehensive loss, net	(33,997)	(359)
Treasury stock, at cost (530,260 shares as of June 30, 2018 and December 31, 2017)	(8,233)	(8,233)
Total shareholders’ equity	936,227	920,964
Total liabilities and shareholders’ equity	$ 11,092,846	$ 9,839,555

Consolidated Balance Sheet - U3

Consolidated Balance Sheet - Unaudited (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Loans held for sale at fair value	$ 1,931,781	$ 1,939,659
Preferred stock, par value (usd per share)	$ 1	$ 1
Preferred stock, liquidation preference (usd per share)	$ 25	$ 25
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, shares issued (shares)	9,000,000	9,000,000
Preferred stock, shares outstanding (shares)	9,000,000	9,000,000
Common stock, par value (usd per share)	$ 1	$ 1
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock, shares issued (shares)	32,199,903	31,912,763
Common stock, shares outstanding (shares)	31,669,643	30,820,177
Treasury stock, shares (shares)	530,260	530,260
Significant Other Observable Inputs (Level 2)
Loans held for sale at fair value	$ 1,931,781	$ 1,795,294

Consolidated Statements of Inco

Consolidated Statements of Income - Unaudited - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income:
Loans receivable, including fees	$ 74,238	$ 67,036	$ 141,117	$ 128,497
Loans held for sale	21,002	17,524	40,054	31,470
Investment securities	9,765	7,823	18,437	13,710
Other	2,634	1,469	4,996	3,269
Total interest income	107,639	93,852	204,604	176,946
Interest expense:
Deposits	24,182	16,228	43,975	30,551
Other borrowings	3,275	1,993	6,651	3,600
FHLB advances	11,176	5,340	18,256	8,401
Subordinated debt	1,684	1,685	3,369	3,370
Total interest expense	40,317	25,246	72,251	45,922
Net interest income	67,322	68,606	132,353	131,024
Provision for loan losses	(784)	535	1,333	3,585
Net interest income after provision for loan losses	68,106	68,071	131,020	127,439
Non-interest income:
Mortgage warehouse transactional fees	1,967	2,523	3,854	4,743
Bank-owned life insurance	1,869	2,258	3,900	3,624
Gain on sale of SBA and other loans	947	573	2,308	1,901
Mortgage banking income	205	291	325	446
Gain on sale of investment securities	0	3,183	0	3,183
Impairment loss on investment securities	0	(2,882)	0	(4,585)
Other	3,125	1,664	6,883	4,414
Total non-interest income	16,127	18,391	37,037	41,144
Non-interest expense:
Salaries and employee benefits	27,748	23,651	52,673	44,763
Technology, communication and bank operations	11,322	8,910	21,266	18,827
Professional services	3,811	6,227	9,820	13,739
Occupancy	3,141	2,657	5,975	5,371
FDIC assessments, non-income taxes, and regulatory fees	2,135	2,416	4,335	4,141
Provision for operating losses	1,233	1,746	2,759	3,392
Merger and acquisition related expenses	869	0	975	0
Loan workout	648	408	1,307	929
Advertising and promotion	319	378	709	704
Other real estate owned expenses	58	160	98	105
Other	2,466	3,860	6,114	7,807
Total non-interest expense	53,750	50,413	106,031	99,778
Income before income tax expense	30,483	36,049	62,026	68,805
Income tax expense	6,820	12,327	14,222	19,336
Net income (loss)	23,663	23,722	47,804	49,469
Preferred stock dividends	3,615	3,615	7,229	7,229
Net income (loss) available to common shareholders	$ 20,048	$ 20,107	$ 40,575	$ 42,240
Basic earnings per common share (usd per share)	$ 0.64	$ 0.66	$ 1.29	$ 1.38
Diluted earnings per common share (usd per share)	$ 0.62	$ 0.62	$ 1.26	$ 1.29
Interchange and card revenue
Non-interest income:
Non-interest income	$ 6,382	$ 8,648	$ 16,043	$ 22,158
Deposit Fees
Non-interest income:
Non-interest income	$ 1,632	$ 2,133	$ 3,724	$ 5,260

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - Unaudited - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 23,663	$ 23,722	$ 47,804	$ 49,469
Unrealized (losses) gains on available-for-sale debt securities:
Unrealized (losses) gains arising during the period	(12,190)	19,885	(46,288)	18,762
Income tax effect	3,170	(7,755)	12,035	(7,317)
Reclassification adjustments for gains on securities included in net income	0	(3,183)	0	(3,183)
Income tax effect	0	(1,241)	0	(1,241)
Net unrealized (losses) gains on available-for-sale debt securities	(9,020)	10,188	(34,253)	9,503
Unrealized gains on cash flow hedges:
Unrealized gains (losses) arising during the period	1,895	(689)	2,768	(360)
Income tax effect	(492)	269	(719)	141
Reclassification adjustment for (gains) losses included in net income	(259)	767	(128)	1,594
Income tax effect	67	(299)	33	(622)
Net unrealized gains on cash flow hedges	1,211	48	1,954	753
Other comprehensive (loss) income, net of income tax effect	(7,809)	10,236	(32,299)	10,256
Comprehensive income	$ 15,854	$ 33,958	$ 15,505	$ 59,725

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - Unaudited - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance, preferred stock (shares) at Dec. 31, 2016		9,000,000
Beginning balance, common stock (shares) at Dec. 31, 2016			30,289,917
Beginning balance at Dec. 31, 2016	$ 855,872	$ 217,471	$ 30,820	$ 427,008	$ 193,698	$ (4,892)	$ (8,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	49,469				49,469
Other comprehensive income	10,256					10,256
Preferred stock dividends	(7,229)				(7,229)
Share-based compensation expense	2,934			2,934
Exercise of warrants (shares)			43,974
Exercise of warrants	420		$ 44	376
Issuance of common stock under share-based compensation arrangements (shares)			396,893
Issuance of common stock under share-based compensation arrangements	(1,433)		$ 397	(1,830)
Ending balance, preferred stock (shares) at Jun. 30, 2017		9,000,000
Ending balance, common stock (shares) at Jun. 30, 2017			30,730,784
Ending balance at Jun. 30, 2017	910,289	$ 217,471	$ 31,261	428,488	235,938	5,364	(8,233)
Beginning balance at Mar. 31, 2017						(4,872)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	23,722
Other comprehensive income	10,236
Ending balance, preferred stock (shares) at Jun. 30, 2017		9,000,000
Ending balance, common stock (shares) at Jun. 30, 2017			30,730,784
Ending balance at Jun. 30, 2017	910,289	$ 217,471	$ 31,261	428,488	235,938	5,364	(8,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of new accounting principle in period of adoption | Accounting Standards Update 2018-02	0
Cumulative effect of new accounting principle in period of adoption | Accounting Standards Update 2016-01	$ 0
Beginning balance, preferred stock (shares) at Dec. 31, 2017	9,000,000	9,000,000
Beginning balance, common stock (shares) at Dec. 31, 2017	30,820,177		31,382,503
Beginning balance at Dec. 31, 2017	$ 920,964	$ 217,471	$ 31,913	422,096	258,076	(359)	(8,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	47,804				47,804
Other comprehensive income	(32,299)					(32,299)
Preferred stock dividends	(7,229)				(7,229)
Share-based compensation expense	3,661			3,661
Exercise of warrants (shares)			5,242
Exercise of warrants	112		$ 5	107
Issuance of common stock under share-based compensation arrangements (shares)			281,898
Issuance of common stock under share-based compensation arrangements	$ 3,214		$ 282	2,932
Ending balance, preferred stock (shares) at Jun. 30, 2018	9,000,000	9,000,000
Ending balance, common stock (shares) at Jun. 30, 2018	31,669,643		31,669,643
Ending balance at Jun. 30, 2018	$ 936,227	$ 217,471	$ 32,200	428,796	299,990	(33,997)	(8,233)
Beginning balance at Mar. 31, 2018						(26,188)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	23,663
Other comprehensive income	$ (7,809)
Ending balance, preferred stock (shares) at Jun. 30, 2018	9,000,000	9,000,000
Ending balance, common stock (shares) at Jun. 30, 2018	31,669,643		31,669,643
Ending balance at Jun. 30, 2018	$ 936,227	$ 217,471	$ 32,200	$ 428,796	$ 299,990	$ (33,997)	$ (8,233)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities
Net income	$ 47,804	$ 49,469
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	1,333	3,585
Depreciation and amortization	6,716	2,393
Share-based compensation expense	4,384	3,562
Deferred taxes	4,172	(2,588)
Net amortization of investment securities premiums and discounts	813	232
Unrealized loss recognized on equity securities	296	0
Gain on sale of investment securities	0	(3,183)
Impairment loss on investment securities	0	4,585
Gain on sale of SBA and other loans	(2,572)	(2,183)
Origination of loans held for sale	(14,272,175)	(14,714,280)
Proceeds from the sale of loans held for sale	14,135,931	14,727,734
Amortization of fair value discounts and premiums	85	98
Net gain on sales of other real estate owned	(28)	(163)
Valuation and other adjustments to other real estate owned	78	231
Earnings on investment in bank-owned life insurance	(3,900)	(3,624)
Increase in accrued interest receivable and other assets	(7,857)	(9,003)
Increase (decrease) in accrued interest payable and other liabilities	13,061	(29,357)
Net Cash (Used In) Provided By Operating Activities	(71,859)	27,508
Cash Flows from Investing Activities
Proceeds from maturities, calls and principal repayments of securities available for sale	26,216	22,843
Proceeds from sale of available-for-sale securities	0	115,982
Purchases of investment securities available for sale	(763,242)	(644,011)
Net increase in loans	(18,680)	(572,253)
Proceeds from sales of loans	29,038	112,927
Purchase of loans	(278,508)	(262,641)
Purchases of bank-owned life insurance	0	(50,000)
Proceeds from bank-owned life insurance	529	1,418
Net purchases of FHLB, Federal Reserve Bank, and other restricted stock	(30,148)	(61,281)
Purchases of bank premises and equipment	(608)	(1,732)
Proceeds from sales of other real estate owned	28	682
Purchase of leased assets under operating leases	(6,486)	0
Net Cash Used In Investing Activities	(1,041,861)	(1,338,066)
Cash Flows from Financing Activities
Net increase in deposits	495,812	171,587
Net increase in short-term borrowed funds from the FHLB	777,937	1,130,800
Net (decrease) increase in federal funds purchased	(50,000)	67,000
Net proceeds from issuance of long-term debt	0	98,574
Preferred stock dividends paid	(7,229)	(7,229)
Exercise of warrants	112	420
Payments of employee taxes withheld from share-based awards	(700)	(3,961)
Proceeds from issuance of common stock	3,191	1,900
Net Cash Provided By Financing Activities	1,219,123	1,459,091
Net Increase in Cash and Cash Equivalents	105,403	148,533
Cash and Cash Equivalents – Beginning	146,323	264,709
Cash and Cash Equivalents – Ending	251,726	413,242
Supplementary Cash Flows Information:
Interest paid	73,162	44,983
Income taxes paid	4,174	21,715
Non-cash items:
Transfer of loans to other real estate owned	57	0
Transfer of loans held for investment to loans held for sale	0	150,758
Transfer of loans held for sale to held for investment	129,691	0
University relationship intangible purchased not settled	$ 1,502	$ 0

Description of the Business

Description of the Business	6 Months Ended
	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	DESCRIPTION OF THE BUSINESS Customers Bancorp, Inc. (the “Bancorp” or “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. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Customers Bancorp, Inc. and its wholly owned subsidiaries, Customers 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 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. In October 2017, Customers announced its intent to spin-off its BankMobile business directly to Customers’ shareholders, to be followed by a merger of BankMobile into Flagship Community Bank ("Flagship"), as the most favorable option for disposition of BankMobile to Customers' shareholders rather than selling the business directly to a third party. Until execution of the spin-off and merger transaction, the assets and liabilities of BankMobile will be reported as held and used for all periods presented. Previously, Customers had stated its intention to sell BankMobile and, accordingly, all BankMobile operating results for the three and six months ended June 30, 2017 and cash flows for the six months ended June 30, 2017 were presented as discontinued operations. All prior period amounts have been reclassified to conform with the current period consolidated financial statement presentation. See NOTE 2 SPIN-OFF AND MERGER for more information regarding the spin-off and merger transaction. Customers 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.

Spin-Off and Merger

Spin-Off and Merger	6 Months Ended
	Jun. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Spin-Off and Merger	SPIN-OFF AND MERGER In third quarter 2017, Customers decided that the best strategy for its shareholders to realize the value of the BankMobile business was to divest BankMobile through a spin-off of BankMobile to Customers’ shareholders to be followed by a merger with Flagship Community Bank ("Flagship"). An Amended and Restated Purchase and Assumption Agreement and Plan of Merger (the "Amended Agreement") with Flagship to effect the spin-off and merger and Flagship's related purchase of BankMobile deposits from Customers was executed on November 17, 2017. Per the provisions of the Amended Agreement, the spin-off will be followed by a merger of the BankMobile spin-off subsidiary into Flagship, with Customers' shareholders first receiving shares of the BankMobile spin-off subsidiary as a dividend in the spin-off and then receiving shares of Flagship common stock in the merger of the BankMobile spin-off subsidiary into Flagship in exchange for shares of the BankMobile spin-off subsidiary common stock they receive in the spin-off. Separately, Flagship will assume the deposits and purchase certain associated assets of BankMobile for $10 million . Following completion of the spin-off and merger and other transactions contemplated in the Amended Agreement between Customers and Flagship, the BankMobile spin-off subsidiary shareholders would receive collectively more than 50% of Flagship common stock. The common stock of the merged entities, expected to be called BankMobile, is expected to be listed on a national securities exchange after completion of the transactions. In connection with the signing of the Amended Agreement on November 17, 2017, Customers deposited $1.0 million in an escrow account with a third party to be reserved for payment to Flagship in the event the Amended Agreement is terminated for reasons described in the Amended Agreement. This $1.0 million is considered restricted cash and is presented in cash and cash equivalents in the accompanying June 30, 2018 consolidated balance sheet. The Amended Agreement provides that completion of the transactions will be subject to the receipt of all necessary closing conditions. Although the possibility still exits that the spin-off and merger could close by September 30, 2018, at this time, no assurance can be given that the spin-off and merger will occur by or shortly after September 30, 2018. As of June 30, 2017, BankMobile met the criteria to be classified as held for sale and, accordingly, the operating results of BankMobile for the three and six month periods ended June 30, 2017 , along with the associated cash flows of BankMobile for the six months ended June 30, 2017, were presented as "Discontinued operations." However, generally accepted accounting principles require that assets, liabilities, operating results, and cash flows associated with a business to be disposed of through a spin-off/merger transaction should not be reported as held for sale or discontinued operations until execution of the spin-off/merger transaction. As a result, beginning in third quarter 2017, the period in which Customers decided to spin-off BankMobile rather than selling directly to a third party, BankMobile's operating results and cash flows were no longer reported as held for sale or discontinued operations but instead were reported as held and used. At September 30, 2017, Customers measured the business at the lower of its (i) carrying amount before it was classified as held for sale, adjusted for depreciation and amortization expense that would have been recognized had the business been continuously classified as held and used, or (ii) fair value at the date the decision not to sell was made. Amounts previously reported as discontinued operations for the three and six month periods ended June 30, 2017 have been reclassified to conform with the current period presentation within the accompanying consolidated financial statements as summarized below. Customers will continue reporting the Community Business Banking and BankMobile segment results. See NOTE 12 - BUSINESS SEGMENTS . The following tables summarize the effect of the reclassification of BankMobile from held for sale to held and used on the previously reported consolidated statements of income for the three and six months ended June 30, 2017 : Three Months Ended June 30, 2017 (amounts in thousands) As Previously Reported Effect of Reclassification From Held For Sale to Held and Used After Reclassification Interest income $ 93,852 $ — $ 93,852 Interest expense 25,236 10 25,246 Net interest income 68,616 (10 ) 68,606 Provision for loan losses 535 — 535 Non-interest income 6,971 11,420 18,391 Non-interest expense 30,567 19,846 50,413 Income from continuing operations before income taxes 44,485 (8,436 ) 36,049 Provision for income taxes 15,533 (3,206 ) 12,327 Net income from continuing operations 28,952 (5,230 ) 23,722 Loss from discontinued operations before income taxes (8,436 ) 8,436 — Income tax benefit from discontinued operations (3,206 ) 3,206 — Net loss from discontinued operations (5,230 ) 5,230 — Net income 23,722 — 23,722 Preferred stock dividends 3,615 — 3,615 Net income available to common shareholders $ 20,107 $ — $ 20,107 Six Months Ended June 30, 2017 (amounts in thousands) As Previously Reported Effect of Reclassification From Held For Sale to Held and Used After Reclassification Interest income $ 176,946 $ — $ 176,946 Interest expense 45,906 16 45,922 Net interest income 131,040 (16 ) 131,024 Provision for loan losses 3,585 — 3,585 Non-interest income 12,398 28,746 41,144 Non-interest expense 60,714 39,064 99,778 Income from continuing operations before income taxes 79,139 (10,334 ) 68,805 Provision for income taxes 23,263 (3,927 ) 19,336 Net income from continuing operations 55,876 (6,407 ) 49,469 Loss from discontinued operations before income taxes (10,334 ) 10,334 — Income tax benefit from discontinued operations (3,927 ) 3,927 — Net loss from discontinued operations (6,407 ) 6,407 — Net income 49,469 — 49,469 Preferred stock dividends 7,229 — 7,229 Net income available to common shareholders $ 42,240 $ — $ 42,240

Significant Accounting Policies

Significant Accounting Policies and Basis of Presentation	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies and Basis of Presentation	SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION Basis of Presentation The interim unaudited consolidated financial statements of Customers Bancorp and subsidiaries have been prepared pursuant to the rules and regulations of the SEC. These interim unaudited consolidated financial statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present a fair statement of the financial position and the results of operations and cash flows of Customers Bancorp and subsidiaries for the interim periods presented. Certain information and footnote disclosures normally included in the annual consolidated financial statements have been omitted from these interim unaudited consolidated financial statements as permitted by SEC rules and regulations. The December 31, 2017 consolidated balance sheet presented in this report has been derived from Customers Bancorp’s audited 2017 consolidated financial statements. Management believes that the disclosures are adequate to present fairly the consolidated financial statements as of the dates and for the periods presented. These interim unaudited consolidated financial statements should be read in conjunction with the 2017 consolidated financial statements of Customers Bancorp and subsidiaries included in Customers' Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 23, 2018 (the "2017 Form 10-K"). That Form 10-K describes Customers Bancorp’s significant accounting policies, which include its policies on Principles of Consolidation; Cash and Cash Equivalents and Statements of Cash Flows; Restrictions on Cash and Amounts due from Banks; Business Combinations; Investment Securities; Loan Accounting Framework; Loans Held for Sale and Loans at Fair Value; Loans Receivable; Purchased Loans; Allowance for Loan Losses; Goodwill and Other Intangible Assets; Investments in FHLB, Federal Reserve Bank, and Other Restricted Stock; Other Real Estate Owned; Bank-Owned Life Insurance; Bank Premises and Equipment; Operating Leases; Treasury Stock; Income Taxes; Share-Based Compensation; Transfer of Financial Assets; Business Segments; Derivative Instruments and Hedging; Comprehensive Income (Loss); Earnings per Share; and Loss Contingencies. Results for interim periods are not necessarily indicative of those that may be expected for the fiscal year. Reclassifications As described in NOTE 2 - SPIN-OFF AND MERGER, beginning in third quarter 2017, Customers reclassified BankMobile, a segment previously classified as held for sale, to held and used as it no longer met the held-for-sale criteria. Certain prior period amounts and note disclosures (including NOTE 4 , NOTE 8 and NOTE 10 ) have been reclassified to conform with the current period presentation. Except for these reclassifications, there have been no material changes to Customers' significant accounting policies as disclosed in Customers' Annual Report on Form 10-K for the year ended December 31, 2017 . Presented below are recently issued accounting standards that Customers has adopted as well as those that the Financial Accounting Standards Board (“FASB”) has issued but are not yet effective or that Customers has not yet adopted. Recently Issued Accounting Standards Accounting Standards Adopted in 2018 Standard Summary of guidance Effects on Financial Statements ASU 2018-03, Technical Corrections and Improvements to Financial Instruments-Overall (Subtopic 825-10) Ÿ Clarifies certain aspects of the guidance issued in ASU 2016-01 including: the ability to irrevocably elect to change the measurement approach for equity securities measured using the practical expedient (at cost plus or minus observable transactions less impairment) to a fair value method in accordance with ASC 820, Fair Value Measurement. Ÿ Provides clarification that if an observable transaction occurs for such securities, the adjustment is as of the observable transaction date. Ÿ Effective July 1, 2018 on a prospective basis with early adoption permitted. Ÿ Customers adopted on July 1, 2018 on a prospective basis. Ÿ The adoption did not have a significant impact as Customers currently does not have any significant equity securities without readily determinable fair values. Issued February 2018 ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income/(Loss) ("AOCI") Ÿ Allows for reclassification from AOCI to retained earnings for stranded tax effects resulting from the 2017 Tax Cut and Jobs Act. Ÿ Requires an entity to disclose whether it has elected to reclassify stranded tax effects from AOCI to retained earnings and its policy for releasing income tax effects from AOCI. Ÿ Effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. Ÿ Customers early adopted on January 1, 2018. Ÿ The adoption resulted in the reclassification of $0.3 million in stranded tax effects in Customers' AOCI related to net unrealized losses on its available-for-sale debt securities and cash flow hedges. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued February 2018 ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities Ÿ Aligns the entity's risk management activities and financial reporting for hedging relationships. Ÿ Amends the existing hedge accounting model and expands an entity's ability to hedge nonfinancial and financial risk components and reduce complexity in fair value hedges of interest-rate risk. Ÿ Eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line item as the hedge item. Ÿ Changes certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness. Ÿ Effective for fiscal years beginning after December 15, 2018. Early adoption is permitted. Ÿ Customers early adopted on January 1, 2018. Ÿ With the early adoption, Customers is able to pursue additional hedging strategies including the ability to apply fair value hedge accounting to a specified pool of assets by excluding the portion of the hedged items related to prepayments, defaults and other events. Ÿ These additional hedging strategies will allow Customers to better align the accounting and financial reporting of its hedging activities with the economic objectives thereby reducing the earnings volatility resulting from these hedging activities. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Customers has updated its disclosures in NOTE 11 - DERIVATIVES INSTRUMENTS AND HEDGING ACTIVITIES as a result of early adopting this ASU. Issued August 2017 ASU 2017-09, Compensation - Stock Compensation: Scope of Modification Accounting Ÿ Clarifies when to account for a change to the terms or conditions of a share-based-payment award as a modification in ASC 718. Ÿ Provides that modification accounting is only required if the fair value, vesting conditions, or the classification of the award as equity or a liability changes as a result of the change in terms or conditions. Ÿ Effective January 1, 2018 on a prospective basis for awards modified on or after the adoption date. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued May 2017 ASU 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets Ÿ Clarifies the scope and application of the accounting guidance on the sale of nonfinancial assets to non-customers, including partial sales. Ÿ Clarifies that if substantially all of the fair value of the assets that are promised to the counterparty in a contract is concentrated in nonfinancial assets, then all of the financial assets promised to the counterparty are in substance nonfinancial assets within the scope of Subtopic 610-20. Ÿ Effective January 1, 2018 on a prospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued February 2017 Accounting Standards Adopted in 2018 (continued) Standard Summary of guidance Effects on Financial Statements ASU 2017-01, Clarifying the Definition of a Business Ÿ Narrows the definition of a business and clarifies that to be considered a business, the fair value of gross assets acquired (or disposed of) should not be concentrated in a single identifiable asset or a group of similar identifiable assets. Ÿ Also clarifies that in order to be considered a business, an acquisition would have to include an input and a substantive process that together will significantly contribute to the ability to create an output. Ÿ Effective January 1, 2018 on a prospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued January 2017 ASU 2016-18, Statement of Cash Flows: Restricted Cash Ÿ Requires inclusion of restricted cash in cash and cash equivalents when reconciling the beginning-of-period total amounts shown on the statement of cash flows. Ÿ Effective January 1, 2018 and requires retrospective application to all periods presented. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not result in any significant impact on Customers' consolidated financial statements, including its consolidated statement of cash flows, and therefore did not result in a retrospective application. Issued November 2016 ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory Ÿ Requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Ÿ Eliminates the current exception for all intra-entity transfers of an asset other than inventory that requires deferral of the tax effects until the asset is sold to a third party or otherwise recovered through use. Ÿ Effective January 1, 2018 on a modified retrospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption of the ASU did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued October 2016 ASU 2016-15, Statement of Cash Flow: Classification of Certain Cash Receipts and Cash Payments Ÿ Aims to reduce the existing diversity in practice with regards to the classification of the following specific items in the statement of cash flows: 1. Cash payments for debt prepayment or extinguishment costs will be classified as an operating activity, while the portion of the payment attributable to principal will be classified as a financing activity. 2. Cash paid by an acquirer soon after a business combination for the settlement of a contingent consideration liability recognized at the acquisition date will be classified in investing activities. 3. Cash proceeds received from the settlement of insurance claims will be classified on the basis of the related insurance coverage (i.e., the nature of the loss). 4. Cash proceeds received from the settlement of bank-owned life insurance policies will be classified as cash inflows from investing activities. 5. A transferor's beneficial interest obtained in a securitization of financial assets will be disclosed as a non-cash activity, and cash received from beneficial interests will be classified in investing activities. Ÿ Effective January 1, 2018 and requires retrospective application to all periods presented. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not result in any significant impact on Customers' consolidated financial statements, including its consolidated statement of cash flows, and therefore it did not result in a retrospective application. Issued August 2016 ASU 2016-04, Liabilities - Extinguishment of Liabilities: Recognition of Breakage for Certain Prepaid Stored-Value Products Ÿ Requires issuers of prepaid stored-value products (such as gift cards, telecommunication cards, and traveler's checks), to derecognize the financial liability related to those products for breakage. Breakage is the value of prepaid stored-value products that is not redeemed by consumers for goods, services or cash. Ÿ The amendments in this ASU provide a narrow scope exception to the guidance in Subtopic 405-20 to require that breakage be accounted for consistent with the breakage guidance in Topic 606. Ÿ Effective January 1, 2018 on a modified retrospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption of this ASU did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued March 2016 Accounting Standards Adopted in 2018 (continued) Standard Summary of guidance Effects on Financial Statements ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities Ÿ Requires equity investments with certain exceptions, to be measured at fair value with changes in fair value recognized in net income. Ÿ Simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. Ÿ Eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. Ÿ Requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. Ÿ Requires an entity to present separately in other comprehensive income the portion of the change in fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. Ÿ Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the accompanying notes to the financial statements. Ÿ Clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. Ÿ Effective January 1, 2018 on a modified retrospective basis. Ÿ Customers adopted on January 1, 2018 using a modified retrospective approach. Ÿ The adoption of this ASU resulted in a cumulative-effect adjustment that resulted in a $1.0 million reduction in AOCI and a corresponding increase in retained earnings for the same amount. Ÿ The $1.0 million represented the net unrealized gain on Customers' investment in Religare equity securities at December 31, 2017, as disclosed in NOTE 6 - INVESTMENT SECURITIES. Ÿ Customers also refined its calculation to determine the fair value of its held-for- investment loan portfolio for disclosure purposes using an exit price notion as part of adopting this ASU. The refined calculation did not have a significant impact on Customers' fair value disclosures. Issued January 2016 ASU 2014-09, Revenue from Contracts with Customers (Topic 606) Issued May 2014 Ÿ Supersedes the revenue recognition requirements in ASC 605. Ÿ Requires an entity to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Ÿ The amendment includes a five-step process to assist an entity in achieving the main principle(s) of revenue recognition under ASC 605. Ÿ Reframed the structure of the indicators of when an entity is acting as an agent and focused on evidence that an entity is acting as the principal or agent in a revenue transaction. Ÿ Requires additional qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Ÿ Effective January 1 , 2018 and can be either applied retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption (modified retrospective approach). Ÿ Customers adopted on January 1, 2018 on a modified retrospective basis. Ÿ Because the ASU does not apply to revenue associated with leases and financial instruments (including loans and securities), Customers concluded that the new guidance did not have a material impact on the elements of its consolidated statements of operations most closely associated with leases and financial instruments (such as interest income, interest expense and securities gain). Ÿ Customers has identified its deposit-related fees, service charges, debit and prepaid card interchange income and university fees to be within the scope of the standard. Ÿ Customers has also completed its review of the related contracts and its evaluation of certain costs related to these revenue streams and determined that its debit and prepaid card interchange income, previously reported on a gross basis for periods prior to adoption, will need to be presented on a net basis under this ASU, as Customers is the agent. Ÿ The adoption of this ASU, did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Additional discussion related to the adoption and the required quantitative and qualitative disclosures are included in NOTE 13 - NON-INTEREST REVENUES. Accounting Standards Issued But Not Yet Adopted Standard Summary of guidance Effects on Financial Statements ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-employee Share-Based Payment Accounting Ÿ 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. Ÿ 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. Ÿ 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). Ÿ 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. Ÿ Effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. Ÿ Customers currently does not grant share-based payment awards to non-employees and, accordingly, does not expect the adoption of this ASU to have a significant impact on its financial condition, results of operations and consolidated financial statements; however, Customers will continue to evaluate the potential impact of this ASU through the adoption date. Issued June 2018 ASU 2017-11, Accounting for Certain Financial Instruments with Down Round Features Ÿ Changes the classification analysis of certain equity-linked financial instruments (or embedded features) with down round features. Ÿ 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. Ÿ 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 earnings per share ("EPS"). Ÿ Effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Ÿ Customers currently does not have any equity-linked financial instruments (or embedded features) with down round features and, accordingly, does not expect the adoption of this ASU to have a significant impact on its financial condition, results of operations and consolidated financial statements; however, Customers will continue to evaluate the potential impact of this ASU through the adoption date. Issued July 2017 ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities Ÿ Requires that premiums for certain callable debt securities held be amortized to their earliest call date. Ÿ Effective for Customers beginning after December 15, 2018, with early adoption permitted. Ÿ Adoption of this new guidance must be applied on a modified retrospective approach. Ÿ Customers currently has an immaterial amount of callable debt securities purchased at a premium and, accordingly, does not expect the adoption of this ASU to have a significant impact on its financial condition, results of operations and consolidated financial statements; however, Customers will continue to evaluate the potential impact through the adoption date. Issued March 2017 Accounting Standards Issued But Not Yet Adopted (continued) Standard Summary of guidance Effects on Financial Statements ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments Ÿ Requires an entity to utilize a new impairment model known as the current expected credit loss ("CECL") 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 purchased credit-impaired debt securities and loans. Ÿ Effective beginning after December 15, 2019 with early adoption permitted. Ÿ Adoption can 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 is currently evaluating the impact of this ASU, continuing its implementation efforts across the company and reviewing the loss modeling requirements consistent with lifetime expected loss estimates. Ÿ Customers expects that the new model will include different assumptions used in calculating credit losses, such as estimating losses over the estimated life of a financial asset and will consider expected future changes in macroeconomic conditions. Ÿ The adoption of this ASU may result in an increase to Customers' allowance for loan losses which will depend upon the nature and characteristics of Customers' loan portfolio at the adoption date, as well as the macroeconomic conditions and forecasts at that date. Ÿ Customers currently does not intend to early adopt this new guidance. Issued June 2016 ASU 2016-02, Leases Ÿ Supersedes the current lease accounting guidance for both lessees and lessors under ASC 840, Leases. Ÿ From the lessee's perspective, the new standard establishes a right-of-use ("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. Ÿ Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement for lessees. Ÿ This ASU will require 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. Ÿ Effective beginning after December 15, 2018 with early adoption permitted. Ÿ A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. Ÿ 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. Ÿ Customers is currently evaluating the impact of this ASU on its financial condition and results of operations and expects to recognize right-of-use assets and lease liabilities for substantially all of its operating lease commitments based on the present value of unpaid lease payments as of the date of adoption. Ÿ Customers expects to apply the new transition option under ASU 2018-11. Ÿ Customers does not intend to early adopt this ASU. Issued February 2016

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2018
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. Three Months Ended Six Months Ended 2018 2017 2018 2017 (amounts in thousands, except share and per share data) Net income available to common shareholders $ 20,048 $ 20,107 $ 40,575 $ 42,240 Weighted-average number of common shares outstanding - basic 31,564,893 30,641,554 31,495,082 30,524,955 Share-based compensation plans 807,258 1,910,634 823,245 2,129,773 Warrants 8,511 17,464 8,566 27,318 Weighted-average number of common shares - diluted 32,380,662 32,569,652 32,326,893 32,682,046 Basic earnings per common share $ 0.64 $ 0.66 $ 1.29 $ 1.38 Diluted earnings per common share $ 0.62 $ 0.62 $ 1.26 $ 1.29 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. Three Months Ended Six Months Ended 2018 2017 2018 2017 Anti-dilutive securities: Share-based compensation awards 1,069,225 288,325 1,069,225 282,725 Warrants — 52,242 — 52,242 Total anti-dilutive securities 1,069,225 340,567 1,069,225 334,967

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) By Component	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss) By Component	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) BY COMPONENT The following tables present the changes in accumulated other comprehensive income (loss) by component for the three and six months ended June 30, 2018 and 2017 . All amounts are presented net of tax. Amounts in parentheses indicate reductions to accumulated other comprehensive income. Three Months Ended June 30, 2018 Available-for-sale debt securities (amounts in thousands) Unrealized Gains (Losses) Foreign Currency Items Total Unrealized Gains (Losses) Unrealized Total Balance - March 31, 2018 $ (26,691 ) $ — $ (26,691 ) $ 503 $ (26,188 ) Other comprehensive income (loss) before reclassifications (9,020 ) — (9,020 ) 1,403 (7,617 ) Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) — — — (192 ) (192 ) Net current-period other comprehensive income (loss) (9,020 ) — (9,020 ) 1,211 (7,809 ) Balance - June 30, 2018 $ (35,711 ) $ — $ (35,711 ) $ 1,714 $ (33,997 ) Six Months Ended June 30, 2018 Available-for-sale securities (amounts in thousands) Unrealized Gains (Losses) Foreign Currency Items Total Unrealized Gains (Losses) Unrealized Total Balance - December 31, 2017 $ (249 ) $ 88 $ (161 ) $ (198 ) $ (359 ) Reclassification of the income tax effects of the Tax Cuts and Jobs Act (2) (256 ) — (256 ) (42 ) (298 ) Reclassification of net unrealized gains on equity securities (2) (953 ) (88 ) (1,041 ) — (1,041 ) Balance after reclassification adjustments on January 1, 2018 (1,458 ) — (1,458 ) (240 ) (1,698 ) Other comprehensive income (loss) before reclassifications (34,253 ) — (34,253 ) 2,049 (32,204 ) Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) — — — (95 ) (95 ) Net current-period other comprehensive income (loss) (34,253 ) — (34,253 ) 1,954 (32,299 ) Balance - June 30, 2018 $ (35,711 ) $ — $ (35,711 ) $ 1,714 $ (33,997 ) (1) Reclassification amounts for cash flow hedges are reported as interest expense on FHLB advances on the consolidated statements of income. (2) 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. See NOTE 3 - SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION for more information. Three Months Ended June 30, 2017 (amounts in thousands) Unrealized Gains (Losses) on Available-For-Sale Debt Securities Unrealized Total Balance - March 31, 2017 $ (3,366 ) $ (1,506 ) $ (4,872 ) Other comprehensive income (loss) before reclassifications 12,130 (420 ) 11,710 Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) (1,942 ) 468 (1,474 ) Net current-period other comprehensive income 10,188 48 10,236 Balance - June 30, 2017 $ 6,822 $ (1,458 ) $ 5,364 Six Months Ended June 30, 2017 (amounts in thousands) Unrealized Gains (Losses) on Available-For-Sale Debt Securities Unrealized Total Balance - December 31, 2016 $ (2,681 ) $ (2,211 ) $ (4,892 ) Other comprehensive income (loss) before reclassifications 11,445 (219 ) 11,226 Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) (1,942 ) 972 (970 ) Net current-period other comprehensive income 9,503 753 10,256 Balance - June 30, 2017 $ 6,822 $ (1,458 ) $ 5,364 (1) Reclassification amounts for available-for-sale debt securities are reported as gain on sale of investment securities on the consolidated statements of income. Reclassification amounts for cash flow hedges are reported as interest expense on FHLB advances on the consolidated statements of income.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The amortized cost and approximate fair value of investment securities as of June 30, 2018 and December 31, 2017 are summarized in the tables below: June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (amounts in thousands) Available-for-Sale Debt Securities: Agency-guaranteed residential mortgage-backed securities $ 490,425 $ — $ (13,862 ) $ 476,563 Agency-guaranteed commercial real estate mortgage-backed securities 334,232 — (13,859 ) 320,373 Corporate notes 381,545 798 (21,335 ) 361,008 Available-for-Sale Debt Securities $ 1,206,202 $ 798 $ (49,056 ) 1,157,944 Equity Securities (1) 3,056 Total Investment Securities, at Fair Value $ 1,161,000 (1) Includes equity securities issued by a foreign entity that are being measured at fair value with changes in fair value recognized directly in earnings effective January 1, 2018 as a result of adopting ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (see NOTE 3 - SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION for additional information related to the adoption of this new standard). December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (amounts in thousands) Available-for-Sale Securities: Agency-guaranteed residential mortgage-backed securities $ 186,221 $ 36 $ (2,799 ) $ 183,458 Agency-guaranteed commercial real estate mortgage-backed securities 238,809 432 (769 ) 238,472 Corporate notes (1) 44,959 1,130 — 46,089 Equity securities (2) 2,311 1,041 — 3,352 Total Available-for-Sale Securities, at Fair Value $ 472,300 $ 2,639 $ (3,568 ) $ 471,371 (1) Includes subordinated debt issued by other bank holding companies. (2) Includes equity securities issued by a foreign entity. The following table presents proceeds from the sale of investment securities and gross gains and gross losses realized on those sales for the three and six month periods ended June 30, 2018 and 2017 : Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (amounts in thousands) Proceeds from sale of available-for-sale securities $ — $ 115,982 $ — $ 115,982 Gross gains $ — $ 3,183 $ — $ 3,183 Gross losses — — — — Net gains (losses) $ — $ 3,183 $ — $ 3,183 These gains were determined using the specific identification method and were reported as gains on sale of investment securities included in non-interest income on the consolidated statements of income. The following table shows debt investment securities by stated maturity. Investment securities backed by mortgages 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: June 30, 2018 Amortized Cost Fair Value (amounts in thousands) Due in one year or less $ — $ — Due after one year through five years — — Due after five years through ten years 179,413 171,214 Due after ten years 202,132 189,794 Agency-guaranteed residential mortgage-backed securities 490,425 476,563 Agency-guaranteed commercial real estate mortgage-backed securities 334,232 320,373 Total debt securities $ 1,206,202 $ 1,157,944 Gross unrealized losses and fair value of Customers' available for sale debt investment securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (amounts in thousands) Available-for-Sale Debt Securities: Agency-guaranteed residential mortgage-backed securities $ 416,002 $ (10,256 ) $ 60,561 $ (3,606 ) $ 476,563 $ (13,862 ) Agency-guaranteed commercial real estate mortgage-backed securities 314,525 (13,532 ) 5,848 (327 ) 320,373 (13,859 ) Corporate notes 315,249 (21,335 ) — — 315,249 (21,335 ) Total $ 1,045,776 $ (45,123 ) $ 66,409 $ (3,933 ) $ 1,112,185 $ (49,056 ) December 31, 2017 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (amounts in thousands) Available-for-Sale Debt Securities: Agency-guaranteed residential mortgage-backed securities $ 104,861 $ (656 ) $ 66,579 $ (2,143 ) $ 171,440 $ (2,799 ) Agency-guaranteed commercial real estate mortgage-backed securities 115,970 (740 ) 6,151 (29 ) 122,121 (769 ) Total $ 220,831 $ (1,396 ) $ 72,730 $ (2,172 ) $ 293,561 $ (3,568 ) At June 30, 2018 , there were sixty-four available-for-sale debt investment securities in the less-than-twelve-month category and sixteen available-for-sale debt investment securities in the twelve-month-or-more category. The unrealized losses on the mortgage-backed securities are guaranteed by government-sponsored entities and primarily relate to changes in market interest rates. The unrealized losses on the corporate notes relate to securities with no company specific concentration. The unrealized losses were due to an upward shift in interest rates that resulted in a negative impact on the respective notes pricing. All amounts related to the mortgage-backed securities and the corporate notes are expected to be recovered when market prices recover or at maturity. Customers does not intend to sell these securities and it is not more likely than not that Customers will be required to sell the securities before recovery of the amortized cost basis. During the three and six month period ended June 30, 2017 , Customers recorded other-than-temporary impairment losses of $2.9 million and $4.6 million , respectively, related to its equity holdings in Religare Enterprises Ltd. ("Religare") for the full amount of the decline in fair value from the cost basis established at December 31, 2016 through June 30, 2017 because Customers no longer had the intent to hold these securities until a recovery in fair value. At December 31, 2017, the fair value of the Religare equity securities was $3.4 million which resulted in an unrealized gain of $1.0 million being recognized in accumulated other comprehensive income with no adjustment for deferred taxes as Customers currently does not have a tax strategy in place capable of generating sufficient capital gains to utilize any capital losses resulting from the Religare investment. As described in NOTE 3 - SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION, the adoption of ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, on January 1, 2018 resulted in a cumulative effect adjustment to Customers' consolidated balance sheet with a $1.0 million reduction in accumulated other comprehensive income and a corresponding increase in retained earnings related to the December 31, 2017 unrealized gain on the Religare equity securities. In accordance with the new accounting guidance, changes in the fair value of the Religare equity securities since adoption were recorded directly in earnings, which resulted in an unrealized loss of $0.3 million being recognized in other non-interest income in the accompanying consolidated statements of income for the three and six months ended June 30, 2018 , respectively. At June 30, 2018 and December 31, 2017 , Customers Bank had pledged investment securities aggregating $685.0 million and $16.9 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.

Loans Held for Sale

Loans Held for Sale	6 Months Ended
	Jun. 30, 2018
Receivables Held-for-sale [Abstract]
Loans Held for Sale	LOANS HELD FOR SALE The composition of loans held for sale as of June 30, 2018 and December 31, 2017 was as follows: June 30, 2018 December 31, 2017 (amounts in thousands) Commercial loans: Mortgage warehouse loans, at fair value $ 1,930,738 $ 1,793,408 Multi-family loans at lower of cost or fair value — 144,191 Total commercial loans held for sale 1,930,738 1,937,599 Consumer loans: Residential mortgage loans, at fair value 1,043 1,886 Loans held for sale $ 1,931,781 $ 1,939,485 Commercial loans held for sale consists predominately of commercial loans to mortgage companies (i.e., mortgage warehouse loans). These mortgage warehouse lending transactions are subject to master repurchase agreements and are designated as held for sale 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 loans (i.e., the purchase event) and receives proceeds directly from third party investors when the loans are sold into the secondary market (i.e., the sale event). 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 of 20 days from purchase to sale. The primary goal of these lending transactions is to provide liquidity to mortgage companies. Effective March 31, 2018, Customers Bank transferred $129.7 million of multi-family loans from loans held for sale to loan receivable (held for investment) because the Bank no longer has the intent to sell these loans. Customers Bank transferred these loans at their carrying value, which approximated their fair value at the time of transfer. On June 30, 2017, Customers Bank transferred $150.6 million of multi-family loans from 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, 2017, the carrying value of these loans approximated their fair value. Accordingly, a lower of cost or fair value adjustment was not recorded as of December 31, 2017.

Loans Receivable and Allowance

Loans Receivable and Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loans Receivable and Allowance for Loan Losses	LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES The following table presents loans receivable as of June 30, 2018 and December 31, 2017 . June 30, 2018 December 31, 2017 (amounts in thousands) Commercial: Multi-family $ 3,542,770 $ 3,502,381 Commercial and industrial (including owner occupied commercial real estate) 1,811,751 1,633,818 Commercial real estate non-owner occupied 1,155,998 1,218,719 Construction 88,141 85,393 Total commercial loans 6,598,660 6,440,311 Consumer: Residential real estate 493,222 234,090 Manufactured housing 85,328 90,227 Other 3,874 3,547 Total consumer loans 582,424 327,864 Total loans receivable 7,181,084 6,768,175 Deferred costs and unamortized premiums, net 642 83 Allowance for loan losses (38,288 ) (38,015 ) Loans receivable, net of allowance for loan losses $ 7,143,438 $ 6,730,243 The following tables summarize loans receivable by loan type and performance status as of June 30, 2018 and December 31, 2017 : June 30, 2018 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 (4) (amounts in thousands) Multi-family $ — $ — $ — $ 1,343 $ 3,539,640 $ 1,787 $ 3,542,770 Commercial and industrial 1,087 — 1,087 13,683 1,251,148 602 1,266,520 Commercial real estate - owner occupied — — — 718 534,923 9,590 545,231 Commercial real estate - non-owner occupied — — — 2,536 1,148,581 4,881 1,155,998 Construction — — — — 88,141 — 88,141 Residential real estate 2,174 — 2,174 5,606 480,381 5,061 493,222 Manufactured housing (5) 2,977 2,661 5,638 2,015 75,250 2,425 85,328 Other consumer 56 — 56 94 3,496 228 3,874 Total $ 6,294 $ 2,661 $ 8,955 $ 25,995 $ 7,121,560 $ 24,574 $ 7,181,084 December 31, 2017 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 (4) (amounts in thousands) Multi-family $ 4,900 $ — $ 4,900 $ — $ 3,495,600 $ 1,881 $ 3,502,381 Commercial and industrial 103 — 103 17,392 1,130,831 764 1,149,090 Commercial real estate - owner occupied 202 — 202 1,453 472,501 10,572 484,728 Commercial real estate - non-owner occupied 93 — 93 160 1,213,216 5,250 1,218,719 Construction — — — — 85,393 — 85,393 Residential real estate 7,628 — 7,628 5,420 215,361 5,681 234,090 Manufactured housing (5) 4,028 2,743 6,771 1,959 78,946 2,551 90,227 Other consumer 116 — 116 31 3,184 216 3,547 Total $ 17,070 $ 2,743 $ 19,813 $ 26,415 $ 6,695,032 $ 26,915 $ 6,768,175 (1) Includes past due loans that are accruing interest because collection is considered probable. (2) Loans 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. Because of 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 allowance for loan losses. (5) Manufactured housing loans purchased in 2010 are supported by cash reserves held at the Bank that are used to fund past-due payments when the loan becomes 90 days or more delinquent. Subsequent purchases are subject to varying provisions in the event of borrowers’ delinquencies. As of June 30, 2018 and December 31, 2017, the Bank had $0.3 million , respectively, of residential real estate held in other real estate owned. As of June 30, 2018 and December 31, 2017, the Bank had initiated foreclosure proceedings on $2.2 million and $1.6 million , respectively, in loans secured by residential real estate. Allowance for loan losses The changes in the allowance for loan losses for the three and six months ended June 30, 2018 and 2017 , and the loans and allowance for loan losses by loan class based on impairment-evaluation method as of June 30, 2018 and December 31, 2017 are presented in the tables below. Three Months Ended June 30, 2018 Multi-family Commercial and Industrial Commercial Real Estate Owner Occupied Commercial Construction Residential Manufactured Other Consumer Total (amounts in thousands) Ending Balance, March 31, 2018 $ 12,545 $ 11,737 $ 3,525 $ 7,233 $ 921 $ 3,179 $ 176 $ 183 $ 39,499 Charge-offs — (174 ) (483 ) — — (42 ) — (462 ) (1,161 ) Recoveries — 140 326 — 209 56 — 3 734 Provision for loan losses (476 ) 555 (380 ) (535 ) (138 ) (285 ) (27 ) 502 (784 ) Ending Balance, June 30, 2018 $ 12,069 $ 12,258 $ 2,988 $ 6,698 $ 992 $ 2,908 $ 149 $ 226 $ 38,288 Six Months Ended June 30, 2018 Ending Balance, December 31, 2017 $ 12,168 $ 10,918 $ 3,232 $ 7,437 $ 979 $ 2,929 $ 180 $ 172 $ 38,015 Charge-offs — (224 ) (501 ) — — (407 ) — (718 ) (1,850 ) Recoveries — 175 326 — 220 63 — 6 790 Provision for loan losses (99 ) 1,389 (69 ) (739 ) (207 ) 323 (31 ) 766 1,333 Ending Balance, June 30, 2018 $ 12,069 $ 12,258 $ 2,988 $ 6,698 $ 992 $ 2,908 $ 149 $ 226 $ 38,288 As of June 30, 2018 Loans: Individually evaluated for impairment $ 1,343 $ 13,750 $ 759 $ 2,536 $ — $ 8,775 $ 10,372 $ 94 $ 37,629 Collectively evaluated for impairment 3,539,640 1,252,168 534,882 1,148,581 88,141 479,386 72,531 3,552 7,118,881 Loans acquired with credit deterioration 1,787 602 9,590 4,881 — 5,061 2,425 228 24,574 $ 3,542,770 $ 1,266,520 $ 545,231 $ 1,155,998 $ 88,141 $ 493,222 $ 85,328 $ 3,874 $ 7,181,084 Allowance for loan losses: Individually evaluated for impairment $ — $ 1,062 $ 1 $ — $ — $ 313 $ 5 $ — $ 1,381 Collectively evaluated for impairment 12,069 10,749 2,987 4,334 992 2,106 81 154 33,472 Loans acquired with credit deterioration — 447 — 2,364 — 489 63 72 3,435 $ 12,069 $ 12,258 $ 2,988 $ 6,698 $ 992 $ 2,908 $ 149 $ 226 $ 38,288 Three Months Ended June 30, 2017 Multi-family Commercial and Industrial Commercial Real Estate Owner Occupied Commercial Construction Residential Manufactured Other Consumer Total (amounts in thousands) Ending Balance, March 31, 2017 $ 12,283 $ 13,009 $ 2,394 $ 7,847 $ 885 $ 3,080 $ 284 $ 101 $ 39,883 Charge-offs — (1,849 ) — (4 ) — (69 ) — (226 ) (2,148 ) Recoveries — 68 9 — 49 6 — 56 188 Provision for loan losses (255 ) 357 573 (57 ) (218 ) (22 ) (16 ) 173 535 Ending Balance, June 30, 2017 $ 12,028 $ 11,585 $ 2,976 $ 7,786 $ 716 $ 2,995 $ 268 $ 104 $ 38,458 Six Months Ended June 30, 2017 Ending Balance, December 31, 2016 $ 11,602 $ 11,050 $ 2,183 $ 7,894 $ 840 $ 3,342 $ 286 $ 118 $ 37,315 Charge-offs — (2,047 ) — (408 ) — (290 ) — (246 ) (2,991 ) Recoveries — 283 9 — 130 27 — 100 549 Provision for loan losses 426 2,299 784 300 (254 ) (84 ) (18 ) 132 3,585 Ending Balance, June 30, 2017 $ 12,028 $ 11,585 $ 2,976 $ 7,786 $ 716 $ 2,995 $ 268 $ 104 $ 38,458 As of December 31, 2017 Loans: Individually evaluated for impairment $ — $ 17,461 $ 1,448 $ 160 $ — $ 9,247 $ 10,089 $ 30 $ 38,435 Collectively evaluated for impairment 3,500,500 1,130,865 472,708 1,213,309 85,393 219,162 77,587 3,301 6,702,825 Loans acquired with credit deterioration 1,881 764 10,572 5,250 — 5,681 2,551 216 26,915 $ 3,502,381 $ 1,149,090 $ 484,728 $ 1,218,719 $ 85,393 $ 234,090 $ 90,227 $ 3,547 $ 6,768,175 Allowance for loan losses: Individually evaluated for impairment $ — $ 650 $ 642 $ — $ — $ 155 $ 4 $ — $ 1,451 Collectively evaluated for impairment 12,168 9,804 2,580 4,630 979 2,177 82 117 32,537 Loans acquired with credit deterioration — 464 10 2,807 — 597 94 55 4,027 $ 12,168 $ 10,918 $ 3,232 $ 7,437 $ 979 $ 2,929 $ 180 $ 172 $ 38,015 Certain manufactured housing loans were purchased in August 2010. A portion of the purchase price may be used to reimburse the Bank under the specified terms in the purchase agreement for defaults of the underlying borrower and other specified items. At June 30, 2018 and December 31, 2017 , funds available for reimbursement, if necessary, were $0.5 million and $0.6 million , respectively. Each quarter, these funds are evaluated to determine if they would be sufficient to absorb the probable incurred losses within the manufactured housing portfolio. 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 June 30, 2018 and December 31, 2017 and the average recorded investment and interest income recognized for the three and six months ended June 30, 2018 and 2017 . Purchased-credit-impaired loans are considered to be performing and are not included in the tables below. June 30, 2018 Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Recorded Investment Net of Charge offs Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Interest (amounts in thousands) With no recorded allowance: Multi-family $ 1,343 $ 1,343 $ — $ 672 $ 8 $ 448 $ 8 Commercial and industrial 5,642 5,889 — 5,736 2 6,870 2 Commercial real estate owner occupied 718 1,201 — 664 — 713 — Commercial real estate non-owner occupied 2,536 2,648 — 1,390 8 980 8 Other consumer 94 94 — 96 — 74 — Residential real estate 4,301 4,546 — 3,959 2 3,849 2 Manufactured housing 10,144 10,144 — 10,015 146 9,963 277 With an allowance recorded: Commercial and industrial 8,108 8,292 1,062 8,283 11 8,296 12 Commercial real estate owner occupied 41 41 1 455 1 517 2 Residential real estate 4,474 4,479 313 4,550 38 4,906 63 Manufactured housing 228 228 5 225 6 225 6 Total $ 37,629 $ 38,905 $ 1,381 $ 36,045 $ 222 $ 36,841 $ 380 December 31, 2017 Three Months Ended June 30, 2017 Six Months Ended June 30, 2017 Recorded Investment Net of Charge offs Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Interest (amounts in thousands) With no recorded allowance: Commercial and industrial $ 9,138 $ 9,287 $ — $ 6,678 $ 46 $ 5,251 $ 96 Commercial real estate owner occupied 806 806 — 1,739 — 1,563 3 Commercial real estate non-owner occupied 160 272 — 884 — 1,257 2 Other consumer 30 30 — 56 — 56 — Residential real estate 3,628 3,801 — 2,660 — 4,001 1 Manufactured housing 9,865 9,865 — 10,074 152 9,937 293 With an allowance recorded: Commercial and industrial 8,323 8,506 650 7,209 — 6,846 22 Commercial real estate - owner occupied 642 642 642 839 1 839 2 Commercial real estate non-owner occupied — — — 114 — 126 — Residential real estate 5,619 5,656 155 4,953 45 3,399 84 Manufactured housing 224 224 4 216 5 144 8 Total $ 38,435 $ 39,089 $ 1,451 $ 35,422 $ 249 $ 33,419 $ 511 Troubled Debt Restructurings At June 30, 2018 and December 31, 2017 , there were $19.4 million and $20.4 million , respectively, in loans reported as troubled debt restructurings (“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. Modification of purchased-credit-impaired loans that are accounted for within loan pools in accordance with the accounting standards for purchased-credit-impaired 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. The following table presents total TDRs based on loan type and accrual status at June 30, 2018 and December 31, 2017 . Nonaccrual TDRs are included in the reported amount of total non-accrual loans. June 30, 2018 December 31, 2017 Accruing TDRs Nonaccrual TDRs Total Accruing TDRs Nonaccrual TDRs Total (amounts in thousands) Commercial and industrial $ 67 $ 5,415 $ 5,482 $ 63 $ 5,939 $ 6,002 Commercial real estate owner occupied 41 — 41 — — — Manufactured housing 8,357 1,875 10,232 8,130 1,766 9,896 Residential real estate 3,169 485 3,654 3,828 703 4,531 Other consumer — 13 13 — — — Total TDRs $ 11,634 $ 7,788 $ 19,422 $ 12,021 $ 8,408 $ 20,429 The following table presents loans modified in a troubled debt restructuring by type of concession for the three and six months ended June 30, 2018 and 2017 . There were no modifications that involved forgiveness of debt. Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Extensions of maturity 1 $ 56 2 $ 5,855 Interest-rate reductions 15 607 9 320 Total 16 $ 663 11 $ 6,175 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Extensions of maturity 1 $ 56 3 $ 6,203 Interest-rate reductions 24 929 29 1,175 Total 25 $ 985 32 $ 7,378 The following table provides, by loan type, the number of loans modified in troubled debt restructurings, and the related recorded investment, during the three and six months ended June 30, 2018 and 2017 . Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Commercial and industrial — $ — 2 $ 5,855 Manufactured housing 14 450 9 320 Residential real estate 1 200 — — Other consumer 1 13 — — Total loans 16 $ 663 11 $ 6,175 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Commercial and industrial — $ — 3 $ 6,203 Manufactured housing 23 772 29 1,175 Residential real estate 1 200 — — Other consumer 1 13 — — Total loans 25 $ 985 32 $ 7,378 As of June 30, 2018 and December 31, 2017, except for one commercial and industrial loan with an outstanding commitment of $1.6 million and $2.1 million , respectively, there were no other commitments to lend additional funds to debtors whose loans have been modified in TDRs. As of June 30, 2018 , there were no loans modified in a TDR within the past twelve months that defaulted on payments. As of June 30, 2017 , six manufactured housing loans totaling $0.3 million , that were modified in TDRs within the past twelve months, defaulted on payments. Loans modified in troubled debt restructurings 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 allowance for loan losses. There was no allowance recorded as a result of TDR modifications during the three and six months ended June 30, 2018 . There was no allowance recorded as a result of TDR modifications during the three months ended June 30, 2017. For the six months ended June 30, 2017, there was one allowance recorded resulting from TDR modifications, totaling $1 thousand for one manufactured housing loan. Purchased-Credit-Impaired Loans The changes in accretable yield related to purchased-credit-impaired loans for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended June 30, 2018 2017 (amounts in thousands) Accretable yield balance as of March 31, $ 7,663 $ 9,376 Accretion to interest income (516 ) (465 ) Reclassification from nonaccretable difference and disposals, net 256 95 Accretable yield balance as of June 30, $ 7,403 $ 9,006 Six Months Ended June 30, 2018 2017 (amounts in thousands) Accretable yield balance as of December 31, $ 7,825 $ 10,202 Accretion to interest income (854 ) (958 ) Reclassification from nonaccretable difference and disposals, net 432 (238 ) Accretable yield balance as of June 30, $ 7,403 $ 9,006 Credit Quality Indicators 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 allowance for loan losses 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. The risk rating grades are defined as follows: “1” – Pass / Excellent Loans 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 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 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 rated 3 are those loans 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 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 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. “5” – Satisfactory Loans 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 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 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 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 where significant actual, not potential, weaknesses or problems are clearly evident are graded in the category below. “8” – Substandard Loans are rated 8 when the loans are inadequately protected by the current sound worth and payment capacity of the obligor or of the collateral pledged, if any. Loans 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 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, 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 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 receivable as of June 30, 2018 and December 31, 2017 . June 30, 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) Pass/Satisfactory $ 3,485,669 $ 1,211,934 $ 529,898 $ 1,089,666 $ 88,141 $ — $ — $ — $ 6,405,308 Special Mention 31,001 16,979 8,152 60,943 — — — — 117,075 Substandard 26,100 37,607 7,181 5,389 — — — — 76,277 Performing (1) — — — — — 485,442 77,675 3,724 566,841 Non-performing (2) — — — — — 7,780 7,653 150 15,583 Total $ 3,542,770 $ 1,266,520 $ 545,231 $ 1,155,998 $ 88,141 $ 493,222 $ 85,328 $ 3,874 $ 7,181,084 December 31, 2017 Multi-family Commercial Commercial Commercial Real Estate Non-Owner Occupied Construction Residential Manufactured Other Consumer Total (amounts in thousands) Pass/Satisfactory $ 3,438,554 $ 1,118,889 $ 471,826 $ 1,185,933 $ 85,393 $ — $ — $ — $ 6,300,595 Special Mention 53,873 7,652 5,987 31,767 — — — — 99,279 Substandard 9,954 22,549 6,915 1,019 — — — — 40,437 Performing (1) — — — — — 221,042 81,497 3,400 305,939 Non-performing (2) — — — — — 13,048 8,730 147 21,925 Total $ 3,502,381 $ 1,149,090 $ 484,728 $ 1,218,719 $ 85,393 $ 234,090 $ 90,227 $ 3,547 $ 6,768,175 (1) Includes consumer and other installment loans not subject to risk ratings. (2) Includes loans that are past due and still accruing interest and loans on nonaccrual status. Loan Purchases and Sales In second quarter 2018, Customers purchased $277.4 million of thirty -year fixed-rate residential mortgage loans from Third Federal Savings & Loan. The purchase price was 100.4% of loans outstanding. During second quarter 2018, Customers sold $11.7 million of SBA loans resulting in a gain on sale of $0.9 million . In second quarter 2017, Customers purchased an additional $90.0 million of thirty-year fixed-rate residential mortgage loans from Everbank. The purchase price was 101.0% of loans outstanding. In second quarter 2017, Customers sold $7.0 million of SBA loans resulting in a gain on sale of $0.6 million . Customers did not purchase any loans during first quarter 2018. During first quarter 2018, Customers sold $15.0 million of Small Business Administration (SBA) loans resulting in a gain on sale of $1.4 million . In first quarter 2017, Customers purchased $174.2 million of thirty -year fixed-rate residential mortgage loans from Florida-based Everbank. The purchase price was 98.5% of loans outstanding. In first quarter 2017, Customers sold $94.9 million of multi-family loans for $95.4 million resulting in a gain on sale of $0.5 million and $8.7 million of SBA loans resulting in a gain on sale of $0.8 million . None of the purchases and sales during the three and six months ended June 30, 2018 and 2017 materially affected the credit profile of Customers’ loan portfolio. Loans Pledged as Collateral Customers has pledged eligible real estate loans as collateral for potential borrowings from the Federal Home Loan Bank of Pittsburgh ("FHLB") in the amount of $5.6 billion at June 30, 2018 and $5.5 billion at December 31, 2017 .

Regulatory Capital

Regulatory Capital	6 Months Ended
	Jun. 30, 2018
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 the Bancorp must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items, as calculated under the regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Prompt corrective action provisions are not applicable to bank holding companies. 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 June 30, 2018 and December 31, 2017 , the Bank and the Bancorp satisfied all capital requirements to which they were subject. Generally, to comply with the regulatory definition of adequately capitalized, or well capitalized, respectively, or to comply with the Basel III capital requirements, an institution must at least maintain the common equity Tier 1, Tier 1 and total risk-based capital ratios and the Tier 1 leverage ratio in excess of the related minimum ratios as set forth in the following table: Minimum Capital Levels to be Classified as: Actual Adequacy Capitalized Well Capitalized Basel III Compliant (amounts in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of June 30, 2018: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 735,609 8.611 % $ 384,418 4.500 % N/A N/A $ 544,591 6.375 % Customers Bank $ 1,054,613 12.351 % $ 384,232 4.500 % $ 555,002 6.500 % $ 544,329 6.375 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 953,025 11.156 % $ 512,557 6.000 % N/A N/A $ 672,731 7.875 % Customers Bank $ 1,054,613 12.351 % $ 512,309 6.000 % $ 683,079 8.000 % $ 672,406 7.875 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,072,072 12.550 % $ 683,409 8.000 % N/A N/A $ 843,583 9.875 % Customers Bank $ 1,202,070 14.078 % $ 683,079 8.000 % $ 853,849 10.000 % $ 843,176 9.875 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 953,025 8.866 % $ 429,963 4.000 % N/A N/A $ 429,963 4.000 % Customers Bank $ 1,054,613 9.822 % $ 429,471 4.000 % $ 536,839 5.000 % $ 429,471 4.000 % As of December 31, 2017: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 689,494 8.805 % $ 352,368 4.500 % N/A N/A $ 450,248 5.750 % Customers Bank $ 1,023,564 13.081 % $ 352,122 4.500 % $ 508,621 6.500 % $ 449,934 5.750 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 906,963 11.583 % $ 469,824 6.000 % N/A N/A $ 567,704 7.250 % Customers Bank $ 1,023,564 13.081 % $ 469,496 6.000 % $ 625,994 8.000 % $ 567,307 7.250 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,021,601 13.047 % $ 626,432 8.000 % N/A N/A $ 724,313 9.250 % Customers Bank $ 1,170,666 14.961 % $ 625,994 8.000 % $ 782,493 10.000 % $ 723,806 9.250 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 906,963 8.937 % $ 405,949 4.000 % N/A N/A $ 405,949 4.000 % Customers Bank $ 1,023,564 10.092 % $ 405,701 4.000 % $ 507,126 5.000 % $ 405,701 4.000 % The 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 is being phased in over four years beginning on January 1, 2016, with a maximum buffer of 0.625% of risk weighted assets for 2016, 1.25% for 2017, 1.875% for 2018, and 2.5% for 2019 and thereafter. Effective January 1, 2018, 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 6.375% ; (ii) a Tier 1 risk-based capital ratio of 7.875% ; and (iii) a Total risk-based capital ratio of 9.875% . Failure to maintain the required capital conservation buffer will result in limitations on capital distributions and on discretionary bonuses to executive officers.

Disclosures About Fair Value of

Disclosures About Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2018
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 financial instruments lack an available trading market as characterized by a willing buyer and a willing seller engaging in an exchange transaction. For fair value disclosure purposes, Customers utilized certain fair value measurement criteria under ASC Topic 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 adjustments to inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The following methods and assumptions were used to estimate the fair values of Customers' financial instruments as of June 30, 2018 and December 31, 2017 : Financial Instruments Recorded at Fair Value on a Recurring Basis Investment securities: The fair values of equity securities and available for sale debt securities are determined by obtaining quoted market prices on nationally recognized and foreign securities exchanges (Level 1), 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 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. The carrying amount of investments in FHLB, Federal Reserve Bank, and other restricted stock approximates fair value, and considers the limited marketability of such securities. 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 held for sale - Consumer residential mortgage loans (fair value option): The Bank 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 held for sale - Commercial mortgage warehouse loans (fair value option): The fair value of 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 expected to be recognized because at inception of the transaction the underlying 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 20 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 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 the Bank 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. The Bank 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 the Bank’s 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. 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 other real estate owned ("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 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 Customer’s disclosures and those of other companies may not be meaningful. The estimated fair values of Customers' financial instruments at June 30, 2018 and December 31, 2017 were as follows. Fair Value Measurements at June 30, 2018 Carrying Amount Estimated Fair Value 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 $ 251,726 $ 251,726 $ 251,726 $ — $ — Debt securities, available for sale 1,157,944 1,157,944 — 1,157,944 — Equity securities 3,056 3,056 3,056 — — Loans held for sale 1,931,781 1,931,781 — 1,931,781 — Loans receivable, net of allowance for loan losses 7,143,438 7,127,315 — — 7,127,315 FHLB, Federal Reserve Bank and other restricted stock 136,066 136,066 — 136,066 — Derivatives 16,247 16,247 — 16,114 133 Liabilities: Deposits $ 7,295,954 $ 7,288,828 $ 5,223,793 $ 2,065,035 $ — Federal funds purchased 105,000 105,000 105,000 — — FHLB advances 2,389,797 2,389,785 1,504,797 884,988 — Other borrowings 186,888 185,364 63,554 121,810 — Subordinated debt 108,929 114,675 — 114,675 — Derivatives 13,698 13,698 — 13,698 — Fair Value Measurements at December 31, 2017 Carrying Amount Estimated Fair Value 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 $ 146,323 $ 146,323 $ 146,323 $ — $ — Investment securities, available for sale 471,371 471,371 3,352 468,019 — Loans held for sale 1,939,485 1,939,659 — 1,795,294 144,365 Loans receivable, net of allowance for loan losses 6,730,243 6,676,763 — — 6,676,763 FHLB, Federal Reserve Bank and other restricted stock 105,918 105,918 — 105,918 — Derivatives 9,752 9,752 — 9,692 60 Liabilities: Deposits $ 6,800,142 $ 6,796,095 $ 4,894,449 $ 1,901,646 $ — Federal funds purchased 155,000 155,000 155,000 — — FHLB advances 1,611,860 1,611,603 881,860 729,743 — Other borrowings 186,497 193,557 65,072 128,485 — Subordinated debt 108,880 115,775 — 115,775 — Derivatives 10,074 10,074 — 10,074 — For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at June 30, 2018 and December 31, 2017 were as follows: June 30, 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 debt securities: Agency-guaranteed residential mortgage-backed securities $ — $ 476,563 $ — $ 476,563 Agency-guaranteed commercial mortgage-backed securities — 320,373 — 320,373 Corporate notes — 361,008 — 361,008 Equity securities 3,056 — — 3,056 Derivatives — 16,114 133 16,247 Loans held for sale – fair value option — 1,931,781 — 1,931,781 Total assets - recurring fair value measurements $ 3,056 $ 3,105,839 $ 133 $ 3,109,028 Liabilities Derivatives $ — $ 13,698 $ — $ 13,698 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of reserves of $1,381 $ — $ — $ 11,929 $ 11,929 Other real estate owned — — 1,027 1,027 Total assets - nonrecurring fair value measurements $ — $ — $ 12,956 $ 12,956 December 31, 2017 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 $ — $ 183,458 $ — $ 183,458 Agency-guaranteed commercial real estate mortgage-backed securities — 238,472 — 238,472 Corporate notes — 46,089 — 46,089 Equity securities 3,352 — — 3,352 Derivatives — 9,692 60 9,752 Loans held for sale – fair value option — 1,795,294 — 1,795,294 Total assets - recurring fair value measurements $ 3,352 $ 2,273,005 $ 60 $ 2,276,417 Liabilities Derivatives $ — $ 10,074 $ — $ 10,074 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of reserves of $1,451 $ — $ — $ 13,902 $ 13,902 Other real estate owned — — 1,449 1,449 Total assets - nonrecurring fair value measurements $ — $ — $ 15,351 $ 15,351 The changes in Level 3 assets measured at fair value on a recurring basis for the three and six months ended June 30, 2018 and 2017 are summarized in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 11 - DERIVATIVES INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments Three Months Ended June 30, 2018 2017 (amounts in thousands) Balance at March 31 $ 83 $ 95 Issuances 133 102 Settlements (83 ) (95 ) Balance at June 30 $ 133 $ 102 Residential Mortgage Loan Commitments Six Months Ended June 30, 2018 2017 (amounts in thousands) Balance at December 31 $ 60 $ 45 Issuances 216 197 Settlements (143 ) (140 ) Balance at June 30 $ 133 $ 102 Customers' policy is to recognize transfers between fair value levels when events or circumstances warrant transfers. There were no transfers between levels during the three and six months ended June 30, 2018 and 2017 . The following table summarizes financial assets and financial liabilities measured at fair value as of June 30, 2018 and December 31, 2017 on a recurring and nonrecurring basis for which Customers utilized Level 3 inputs to measure fair value. Quantitative Information about Level 3 Fair Value Measurements June 30, 2018 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (3) (amounts in thousands) Impaired loans $ 11,929 Collateral appraisal (1) Liquidation expenses (2) (8)% Other real estate owned 1,027 Collateral appraisal (1) Liquidation expenses (2) (8)% Residential mortgage loan commitments 133 Adjusted market bid Pull-through rate 90% Quantitative Information about Level 3 Fair Value Measurements December 31, 2017 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (3) (amounts in thousands) Impaired loans $ 13,902 Collateral appraisal (1) Liquidation expenses (2) (8)% Other real estate owned 1,449 Collateral appraisal (1) Liquidation expenses (2) (8)% Residential mortgage loan commitments 60 Adjusted market bid Pull-through rate 90% (1) Obtained from approved independent appraisers. Appraisals are current and in compliance with credit policy. The Bank does not generally discount appraisals. (2) Fair value is adjusted for estimated costs to sell based on a percentage of the value as determined by the appraisal. (3) Presented as a percentage of the value determined by appraisal for impaired loans and other real estate owned.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2018
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 value 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. 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 is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. To date, such derivatives were used to hedge the variable cash flows associated with the forecasted issuances of debt. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on Customers' variable-rate debt. Customers expects to reclassify $0.5 million from accumulated other comprehensive income to interest expense during the next 12 months. Customers is hedging its exposure to the variability in future cash flows for forecasted transactions over a maximum period of 60 months (excluding forecasted transactions related to the payment of variable interest on existing financial instruments). At June 30, 2018 , Customers had thirteen outstanding interest rate derivatives with notional amounts totaling $1.4 billion that were designated as cash flow hedges of interest rate risk. At December 31, 2017 , Customers had nine outstanding interest rate derivatives with notional amounts totaling $550.0 million that were designated as cash flow hedges of interest rate risk. The outstanding cash flow hedges at June 30, 2018 expire between July 2018 and June 2023. Derivatives Not Designated as Hedging Instruments Customers executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies (typically the loan customers will swap a floating-rate loan for a fixed-rate loan). The customer interest rate swaps are simultaneously offset by interest rate swaps that Customers executes with a third party in order to minimize interest rate risk exposure resulting from such transactions. Because the interest rate swaps associated with this program do not meet the hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting third-party market swaps are recognized directly in earnings. At June 30, 2018 , Customers had 82 interest rate swaps with an aggregate notional amount of $779.0 million related to this program. At December 31, 2017 , Customers had 76 interest rate swaps with an aggregate notional amount of $800.5 million related to this program. Customers enters into residential mortgage loan commitments in connection with its consumer mortgage banking activities to fund mortgage loans at specified rates and times in the future. These commitments are short-term in nature and generally expire in 30 to 60 days. The residential mortgage loan commitments that relate to the origination of mortgage loans that will be held for sale are considered derivative instruments under the applicable accounting guidance and are reported at fair value, with changes in fair value recorded directly in earnings. At June 30, 2018 and December 31, 2017 , Customers had an outstanding notional balance of residential mortgage loan commitments of $6.0 million and $2.7 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 recorded directly in earnings. At June 30, 2018 and December 31, 2017 , Customers had outstanding notional balances of credit derivatives of $92.6 million and $80.5 million , respectively. Fair Value of Derivative Instruments on the Balance Sheet The following tables present the fair value of Customers' derivative financial instruments as well as their presentation on the balance sheet as of June 30, 2018 and December 31, 2017 . June 30, 2018 Derivative Assets Derivative Liabilities Balance Sheet Location Fair Value Balance Sheet Location Fair Value (amounts in thousands) Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ 2,732 Other liabilities $ 416 Total $ 2,732 $ 416 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 13,334 Other liabilities $ 13,148 Credit contracts Other assets 48 Other liabilities 134 Residential mortgage loan commitments Other assets 133 Other liabilities — Total $ 13,515 $ 13,282 December 31, 2017 Derivative Assets Derivative Liabilities Balance Sheet Balance Sheet Location Fair Value Location Fair Value (amounts in thousands) Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ 816 Other liabilities $ 1,140 Total $ 816 $ 1,140 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 8,776 Other liabilities $ 8,897 Credit contracts Other assets 100 Other liabilities 37 Residential mortgage loan commitments Other assets 60 Other liabilities — Total $ 8,936 $ 8,934 Effect of Derivative Instruments on Comprehensive Income The following tables present the effect of Customers' derivative financial instruments on comprehensive income for the three and six months ended June 30, 2018 and 2017 . Three Months Ended June 30, 2018 Income Statement Location Amount of Income (Loss) Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ (51 ) Credit contracts Other non-interest income (15 ) Residential mortgage loan commitments Mortgage banking income 50 Total $ (16 ) Three Months Ended June 30, 2017 Income Statement Location Amount of Income (Loss) Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ (145 ) Credit contracts Other non-interest income 1 Residential mortgage loan commitments Mortgage banking income 7 Total $ (137 ) Six Months Ended June 30, 2018 Income Statement Location Amount of Income (Loss) Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 334 Credit contracts Other non-interest income (38 ) Residential mortgage loan commitments Mortgage banking income 73 Total $ 369 Six Months Ended June 30, 2017 Income Statement Location Amount of Income Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 338 Credit contracts Other non-interest income 1 Residential mortgage loan commitments Mortgage banking income 57 Total $ 396 Three Months Ended June 30, 2018 Amount of Gain Recognized in OCI on Derivatives (1) Location of Gain (Loss) Reclassified from Accumulated OCI into Income Amount of Gain Reclassified from Accumulated OCI into Income (amounts in thousands) Derivatives in cash flow hedging relationships: Interest rate swaps $ 1,403 Interest expense $ 259 Three Months Ended June 30, 2017 Amount of Loss Recognized in OCI on Derivatives (1) Location of Gain (Loss) Reclassified from Accumulated OCI into Income Amount of Loss Reclassified from Accumulated OCI into Income (amounts in thousands) Derivatives in cash flow hedging relationships: Interest rate swaps $ (420 ) Interest expense $ (767 ) Six Months Ended June 30, 2018 Amount of Gain Location of Gain (Loss) Amount of Gain (amounts in thousands) Derivative in cash flow hedging relationships: Interest rate swaps $ 2,049 Interest expense $ 128 Six Months Ended June 30, 2017 Amount of Loss Location of Gain (Loss) Amount of Loss (amounts in thousands) Derivative in cash flow hedging relationships: Interest rate swaps $ (219 ) Interest expense $ (1,594 ) (1) Amounts presented are net of taxes. See NOTE 5 - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) for total effect on other comprehensive income (loss) from derivatives designated as cash flow hedges for the periods presented. Credit-risk-related Contingent Features By entering into derivative contracts, Customers is exposed to credit risk. The credit risk associated with derivatives executed with customers is the same as that involved in extending the related loans and is subject to the same standard credit policies. To mitigate the credit-risk exposure to major derivative dealer counterparties, Customers only enters into agreements with those counterparties that maintain credit ratings of high quality. 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 June 30, 2018 , all derivatives with major derivative dealer counterparties were in a net asset position. Disclosures about Offsetting Assets and Liabilities The following tables present derivative instruments that are subject to enforceable master netting arrangements. Customers' interest rate swaps with institutional counterparties are subject to master netting arrangements and are included in the table below. Interest rate swaps 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. Offsetting of Financial Assets and Derivative Assets At June 30, 2018 Gross Amount of Recognized Assets Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Assets Presented in the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount Financial Instruments Cash Collateral Received (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 14,921 $ — $ 14,921 $ — $ 11,170 $ 3,751 Offsetting of Financial Liabilities and Derivative Liabilities At June 30, 2018 Gross Amount of Recognized Liabilities Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Liabilities Presented in the Consolidated Balance Sheet Gross Amounts Financial Instruments Cash Collateral Pledged Net Amount (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 1,639 $ — $ 1,639 $ — $ 2 $ 1,637 Offsetting of Financial Assets and Derivative Assets At December 31, 2017 Gross Amount of Recognized Assets Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Assets Presented in the Consolidated Balance Sheet Gross Amounts Net Amount Financial Instruments Cash Collateral Received (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 5,930 $ — $ 5,930 $ — $ 5,070 $ 860 Offsetting of Financial Liabilities and Derivative Liabilities At December 31, 2017 Gross Amount of Recognized Liabilities Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Liabilities Presented in the Consolidated Balance Sheet Gross Amounts Net Amount Financial Instruments Cash Collateral Pledged (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 5,058 $ — $ 5,058 $ — $ 4,872 $ 186

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2018
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 - Community 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 Community 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, and commercial mortgage companies. Revenues are generated primarily through net interest income (the difference between interest earned on loans, 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 bank owned life insurance. The BankMobile segment provides state-of-the-art high-tech digital banking and disbursement services to consumers, students, and the "under banked" nationwide. BankMobile, as a division of Customers Bank, is a full-service 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 interchange and card revenue, deposit and wire transfer fees and university fees. The majority of revenue and expenses for BankMobile are related to the segment's operation of the ongoing business acquired through the Disbursement business acquisition. The following tables present the operating results for Customers' reportable business segments for the three and six month periods ended June 30, 2018 and 2017 . The segment financial results include directly attributable revenues and expenses. Corporate overhead costs are assigned to the Community Business Banking segment as those expenses are expected to continue following the planned spin-off of BankMobile. Similarly, the preferred stock dividends have been allocated in their entirety to the Community Business Banking segment. The tax benefit assigned to BankMobile was based on an estimated effective tax rate of 24.57% for 2018 and 38.00% for 2017 , respectively. Three Months Ended June 30, 2018 Community Business Banking BankMobile Consolidated Interest income (1) $ 104,110 $ 3,529 $ 107,639 Interest expense 40,182 135 40,317 Net interest income 63,928 3,394 67,322 Provision for loan losses (1,247 ) 463 (784 ) Non-interest income 7,465 8,662 16,127 Non-interest expense 37,721 16,029 53,750 Income (loss) before income tax expense (benefit) 34,919 (4,436 ) 30,483 Income tax expense (benefit) 7,910 (1,090 ) 6,820 Net income (loss) 27,009 (3,346 ) 23,663 Preferred stock dividends 3,615 — 3,615 Net income (loss) available to common shareholders $ 23,394 $ (3,346 ) $ 20,048 Three Months Ended June 30, 2017 Community Business Banking BankMobile Consolidated Interest income (1) $ 91,107 $ 2,745 $ 93,852 Interest expense 25,228 18 25,246 Net interest income 65,879 2,727 68,606 Provision for loan losses 535 — 535 Non-interest income 6,971 11,420 18,391 Non-interest expense 30,567 19,846 50,413 Income (loss) before income tax expense (benefit) 41,748 (5,699 ) 36,049 Income tax expense (benefit) 14,493 (2,166 ) 12,327 Net income (loss) 27,255 (3,533 ) 23,722 Preferred stock dividends 3,615 — 3,615 Net income (loss) available to common shareholders $ 23,640 $ (3,533 ) $ 20,107 (1) - Amounts reported include funds transfer pricing of $3.5 million and $2.7 million for the three months ended June 30, 2018 and 2017 , respectively, credited to BankMobile for the value provided to the Community Business Banking segment for the use of low/no cost deposits. Six Months Ended June 30, 2018 Community Business Banking BankMobile Consolidated Interest income (1) $ 196,664 $ 7,940 $ 204,604 Interest expense 72,100 151 72,251 Net interest income 124,564 7,789 132,353 Provision for loan losses 627 706 1,333 Non-interest income 15,904 21,133 37,037 Non-interest expense 72,052 33,979 106,031 Income (loss) before income tax expense (benefit) 67,789 (5,763 ) 62,026 Income tax expense (benefit) 15,638 (1,416 ) 14,222 Net income (loss) 52,151 (4,347 ) 47,804 Preferred stock dividends 7,229 — 7,229 Net income (loss) available to common shareholders $ 44,922 $ (4,347 ) $ 40,575 As of June 30, 2018 Goodwill and other intangibles $ 3,629 $ 13,521 $ 17,150 Total assets $ 11,017,272 $ 75,574 $ 11,092,846 Total deposits $ 6,876,688 $ 419,266 $ 7,295,954 Total non-deposit liabilities $ 2,843,360 $ 17,305 $ 2,860,665 Six Months Ended June 30, 2017 Community Business Banking BankMobile Consolidated Interest income (1) $ 169,938 $ 7,008 $ 176,946 Interest expense 45,883 39 45,922 Net interest income 124,055 6,969 131,024 Provision for loan losses 3,585 — 3,585 Non-interest income 12,398 28,746 41,144 Non-interest expense 60,714 39,064 99,778 Income (loss) before income tax expense (benefit) 72,154 (3,349 ) 68,805 Income tax expense (benefit) 20,609 (1,273 ) 19,336 Net income (loss) 51,545 (2,076 ) 49,469 Preferred stock dividends 7,229 — 7,229 Net income (loss) available to common shareholders $ 44,316 $ (2,076 ) $ 42,240 As of June 30, 2017 Goodwill and other intangibles $ 3,633 $ 13,982 $ 17,615 Total assets $ 10,815,752 $ 67,796 $ 10,883,548 Total deposits $ 7,021,922 $ 453,441 $ 7,475,363 Total non-deposit liabilities $ 2,481,618 $ 16,278 $ 2,497,896 (1) - Amounts reported include funds transfer pricing of $7.9 million and $7.0 million for the six months ended June 30, 2018 and 2017 , respectively, credited to BankMobile for the value provided to the Community Business Banking segment for the use of low/no cost deposits.

Non-Interest Revenues

Non-Interest Revenues	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Non-Interest Revenues	NON-INTEREST REVENUES As provided in NOTE 3 - SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION, Customers' adoption of ASU 2014-09, Revenue from Contracts with Customers (ASC 606), on January 1, 2018 did not have a significant impact to Customers' consolidated financial statements and, as such, a cumulative effect adjustment to beginning retained earnings was not necessary. Customers determined that its debit and prepaid card interchange income, previously reported on a gross basis for periods prior to adoption will need to be presented on a net basis under this ASU. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts were not adjusted and continue to be reported in accordance with the previous accounting guidance under ASC 605. Debit and prepaid card interchange expense for the three months ended June 30, 2018 and 2017 amounted to $1.2 million and $1.3 million , respectively. Debit and prepaid card interchange expense for the six months ended June 30, 2018 and 2017 amounted to $2.7 million and $3.2 million , respectively. In addition, as part of the enhanced disclosure requirements under the new guidance, Customers is presenting disaggregated revenue by business segment, nature of the revenue stream, and the pattern or timing of revenue recognition. The accounting treatment for interest-related revenues is covered under ASC-310 and is out of the scope of ASU 2014-09. The following tables present Customers' non-interest revenues affected by ASU 2014-09 by business segment for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, 2018 Community Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and Card Revenue $ 183 $ 6,199 $ 6,382 Deposit Fees 294 1,338 1,632 University Fees - Card and Disbursement Fees — 185 185 Total revenue recognized at point in time 477 7,722 8,199 Revenue recognized over time: University Fees - Subscription Revenue — 907 907 Total revenue recognized over time — 907 907 Total revenue from contracts with customers $ 477 $ 8,629 $ 9,106 Three Months Ended June 30, 2017 Community Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and Card Revenue $ 126 $ 8,522 $ 8,648 Deposit Fees 258 1,875 2,133 University Fees - Card and Disbursement Fees — 206 206 Total revenue recognized at point in time 384 10,603 10,987 Revenue recognized over time: University Fees - Subscription Revenue — 784 784 Total revenue recognized over time — 784 784 Total revenue from contracts with customers $ 384 $ 11,387 $ 11,771 Six Months Ended June 30, 2018 Community Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and Card Revenue $ 406 $ 15,637 $ 16,043 Deposit Fees 580 3,144 3,724 University Fees - Card and Disbursement Fees — 512 512 Total revenue recognized at point in time 986 19,293 20,279 Revenue recognized over time: University Fees - Subscription Revenue — 1,777 1,777 Total revenue recognized over time — 1,777 1,777 Total revenue from contracts with customers $ 986 $ 21,070 $ 22,056 Six Months Ended June 30, 2017 Community Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and Card Revenue $ 328 $ 21,830 $ 22,158 Deposit Fees 582 4,678 5,260 University Fees - Card and Disbursement Fees — 595 595 Total revenue recognized at point in time 910 27,103 28,013 Revenue recognized over time: University Fees - Subscription Revenue — 1,579 1,579 Total revenue recognized over time — 1,579 1,579 Total revenue from contracts with customers $ 910 $ 28,682 $ 29,592 The following is a discussion of revenues within the scope of ASC 606: Card revenue Card revenue primarily relates to debit and prepaid card fees earned from interchange and ATM fees. Interchange fees are earned whenever Customers' issued debit and prepaid cards are processed through card payment networks. Interchange fees are recognized concurrent with the processing of the debit or prepaid card transaction. Deposit Fees Deposit fees relate to service charges on deposit accounts for transaction-based, account maintenance and overdraft services. Transaction-based fees, which include services such as stop-payment charges, wire transfer fees, cashier or money order fees are recognized at the time the transaction is executed. Account maintenance fees, which relate primarily to monthly maintenance and account analysis fees, are earned on a monthly basis representing the period over which Customers satisfies its performance obligation. Overdraft fees are recognized at the point in time that the overdraft occurs. Service charges on deposit accounts are withdrawn from the depositor's account balance. The revenues recognized at a point in time primarily consist of contracts with no specified terms, but which may be terminated at any time by the customer without penalty. Due to the transactional nature and indefinite term of these agreements, there were no related contract balances that were recorded for these revenue streams on Customers' consolidated balance sheets as of June 30, 2018 and December 31, 2017. University Fees University fees represent revenues from higher education institutions and is generated from fees charged for the services provided. For higher education institution clients, Customers through BankMobile facilitates the distribution of financial aid and other refunds to students, while simultaneously enhancing the ability of the higher education institutions to comply with the federal regulations applicable to financial aid transactions. For these services, higher education institution clients are charged an annual subscription fee and/or per-transaction fee (e.g., new card or card replacement fees) for certain transactions. The annual subscription fee is recognized ratably over the period of service and the transaction fees are recognized when the transaction is completed. BankMobile also enters into long-term (generally three- or five-year initial term) contracts with higher education institutions to provide these refund management disbursement services. Deferred revenue consists of amounts billed to or received from clients prior to the performance of services. The deferred revenues are earned over the service period on a straight line basis. As of June 30, 2018 and December 31, 2017, Customers recorded deferred revenue of $3.1 million and $2.0 million , respectively, related to these university subscription contracts. At June 30, 2018 and December 31, 2017, Customers had accounts receivable of $2.5 million and $1.1 million , respectively, related to the university fee arrangements.

Significant Accounting Polici21

Significant Accounting Policies and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The interim unaudited consolidated financial statements of Customers Bancorp and subsidiaries have been prepared pursuant to the rules and regulations of the SEC. These interim unaudited consolidated financial statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present a fair statement of the financial position and the results of operations and cash flows of Customers Bancorp and subsidiaries for the interim periods presented. Certain information and footnote disclosures normally included in the annual consolidated financial statements have been omitted from these interim unaudited consolidated financial statements as permitted by SEC rules and regulations. The December 31, 2017 consolidated balance sheet presented in this report has been derived from Customers Bancorp’s audited 2017 consolidated financial statements. Management believes that the disclosures are adequate to present fairly the consolidated financial statements as of the dates and for the periods presented. These interim unaudited consolidated financial statements should be read in conjunction with the 2017 consolidated financial statements of Customers Bancorp and subsidiaries included in Customers' Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 23, 2018 (the "2017 Form 10-K"). That Form 10-K describes Customers Bancorp’s significant accounting policies, which include its policies on Principles of Consolidation; Cash and Cash Equivalents and Statements of Cash Flows; Restrictions on Cash and Amounts due from Banks; Business Combinations; Investment Securities; Loan Accounting Framework; Loans Held for Sale and Loans at Fair Value; Loans Receivable; Purchased Loans; Allowance for Loan Losses; Goodwill and Other Intangible Assets; Investments in FHLB, Federal Reserve Bank, and Other Restricted Stock; Other Real Estate Owned; Bank-Owned Life Insurance; Bank Premises and Equipment; Operating Leases; Treasury Stock; Income Taxes; Share-Based Compensation; Transfer of Financial Assets; Business Segments; Derivative Instruments and Hedging; Comprehensive Income (Loss); Earnings per Share; and Loss Contingencies. Results for interim periods are not necessarily indicative of those that may be expected for the fiscal year.
Reclassifications	Reclassifications As described in NOTE 2 - SPIN-OFF AND MERGER, beginning in third quarter 2017, Customers reclassified BankMobile, a segment previously classified as held for sale, to held and used as it no longer met the held-for-sale criteria. Certain prior period amounts and note disclosures (including NOTE 4 , NOTE 8 and NOTE 10 ) have been reclassified to conform with the current period presentation. Except for these reclassifications, there have been no material changes to Customers' significant accounting policies as disclosed in Customers' Annual Report on Form 10-K for the year ended December 31, 2017 . Presented below are recently issued accounting standards that Customers has adopted as well as those that the Financial Accounting Standards Board (“FASB”) has issued but are not yet effective or that Customers has not yet adopted.
Recently Issued Accounting Standards	Recently Issued Accounting Standards Accounting Standards Adopted in 2018 Standard Summary of guidance Effects on Financial Statements ASU 2018-03, Technical Corrections and Improvements to Financial Instruments-Overall (Subtopic 825-10) Ÿ Clarifies certain aspects of the guidance issued in ASU 2016-01 including: the ability to irrevocably elect to change the measurement approach for equity securities measured using the practical expedient (at cost plus or minus observable transactions less impairment) to a fair value method in accordance with ASC 820, Fair Value Measurement. Ÿ Provides clarification that if an observable transaction occurs for such securities, the adjustment is as of the observable transaction date. Ÿ Effective July 1, 2018 on a prospective basis with early adoption permitted. Ÿ Customers adopted on July 1, 2018 on a prospective basis. Ÿ The adoption did not have a significant impact as Customers currently does not have any significant equity securities without readily determinable fair values. Issued February 2018 ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income/(Loss) ("AOCI") Ÿ Allows for reclassification from AOCI to retained earnings for stranded tax effects resulting from the 2017 Tax Cut and Jobs Act. Ÿ Requires an entity to disclose whether it has elected to reclassify stranded tax effects from AOCI to retained earnings and its policy for releasing income tax effects from AOCI. Ÿ Effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. Ÿ Customers early adopted on January 1, 2018. Ÿ The adoption resulted in the reclassification of $0.3 million in stranded tax effects in Customers' AOCI related to net unrealized losses on its available-for-sale debt securities and cash flow hedges. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued February 2018 ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities Ÿ Aligns the entity's risk management activities and financial reporting for hedging relationships. Ÿ Amends the existing hedge accounting model and expands an entity's ability to hedge nonfinancial and financial risk components and reduce complexity in fair value hedges of interest-rate risk. Ÿ Eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line item as the hedge item. Ÿ Changes certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness. Ÿ Effective for fiscal years beginning after December 15, 2018. Early adoption is permitted. Ÿ Customers early adopted on January 1, 2018. Ÿ With the early adoption, Customers is able to pursue additional hedging strategies including the ability to apply fair value hedge accounting to a specified pool of assets by excluding the portion of the hedged items related to prepayments, defaults and other events. Ÿ These additional hedging strategies will allow Customers to better align the accounting and financial reporting of its hedging activities with the economic objectives thereby reducing the earnings volatility resulting from these hedging activities. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Customers has updated its disclosures in NOTE 11 - DERIVATIVES INSTRUMENTS AND HEDGING ACTIVITIES as a result of early adopting this ASU. Issued August 2017 ASU 2017-09, Compensation - Stock Compensation: Scope of Modification Accounting Ÿ Clarifies when to account for a change to the terms or conditions of a share-based-payment award as a modification in ASC 718. Ÿ Provides that modification accounting is only required if the fair value, vesting conditions, or the classification of the award as equity or a liability changes as a result of the change in terms or conditions. Ÿ Effective January 1, 2018 on a prospective basis for awards modified on or after the adoption date. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued May 2017 ASU 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets Ÿ Clarifies the scope and application of the accounting guidance on the sale of nonfinancial assets to non-customers, including partial sales. Ÿ Clarifies that if substantially all of the fair value of the assets that are promised to the counterparty in a contract is concentrated in nonfinancial assets, then all of the financial assets promised to the counterparty are in substance nonfinancial assets within the scope of Subtopic 610-20. Ÿ Effective January 1, 2018 on a prospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued February 2017 Accounting Standards Adopted in 2018 (continued) Standard Summary of guidance Effects on Financial Statements ASU 2017-01, Clarifying the Definition of a Business Ÿ Narrows the definition of a business and clarifies that to be considered a business, the fair value of gross assets acquired (or disposed of) should not be concentrated in a single identifiable asset or a group of similar identifiable assets. Ÿ Also clarifies that in order to be considered a business, an acquisition would have to include an input and a substantive process that together will significantly contribute to the ability to create an output. Ÿ Effective January 1, 2018 on a prospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued January 2017 ASU 2016-18, Statement of Cash Flows: Restricted Cash Ÿ Requires inclusion of restricted cash in cash and cash equivalents when reconciling the beginning-of-period total amounts shown on the statement of cash flows. Ÿ Effective January 1, 2018 and requires retrospective application to all periods presented. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not result in any significant impact on Customers' consolidated financial statements, including its consolidated statement of cash flows, and therefore did not result in a retrospective application. Issued November 2016 ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory Ÿ Requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Ÿ Eliminates the current exception for all intra-entity transfers of an asset other than inventory that requires deferral of the tax effects until the asset is sold to a third party or otherwise recovered through use. Ÿ Effective January 1, 2018 on a modified retrospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption of the ASU did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued October 2016 ASU 2016-15, Statement of Cash Flow: Classification of Certain Cash Receipts and Cash Payments Ÿ Aims to reduce the existing diversity in practice with regards to the classification of the following specific items in the statement of cash flows: 1. Cash payments for debt prepayment or extinguishment costs will be classified as an operating activity, while the portion of the payment attributable to principal will be classified as a financing activity. 2. Cash paid by an acquirer soon after a business combination for the settlement of a contingent consideration liability recognized at the acquisition date will be classified in investing activities. 3. Cash proceeds received from the settlement of insurance claims will be classified on the basis of the related insurance coverage (i.e., the nature of the loss). 4. Cash proceeds received from the settlement of bank-owned life insurance policies will be classified as cash inflows from investing activities. 5. A transferor's beneficial interest obtained in a securitization of financial assets will be disclosed as a non-cash activity, and cash received from beneficial interests will be classified in investing activities. Ÿ Effective January 1, 2018 and requires retrospective application to all periods presented. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption did not result in any significant impact on Customers' consolidated financial statements, including its consolidated statement of cash flows, and therefore it did not result in a retrospective application. Issued August 2016 ASU 2016-04, Liabilities - Extinguishment of Liabilities: Recognition of Breakage for Certain Prepaid Stored-Value Products Ÿ Requires issuers of prepaid stored-value products (such as gift cards, telecommunication cards, and traveler's checks), to derecognize the financial liability related to those products for breakage. Breakage is the value of prepaid stored-value products that is not redeemed by consumers for goods, services or cash. Ÿ The amendments in this ASU provide a narrow scope exception to the guidance in Subtopic 405-20 to require that breakage be accounted for consistent with the breakage guidance in Topic 606. Ÿ Effective January 1, 2018 on a modified retrospective basis. Ÿ Customers adopted on January 1, 2018. Ÿ The adoption of this ASU did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Issued March 2016 Accounting Standards Adopted in 2018 (continued) Standard Summary of guidance Effects on Financial Statements ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities Ÿ Requires equity investments with certain exceptions, to be measured at fair value with changes in fair value recognized in net income. Ÿ Simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. Ÿ Eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. Ÿ Requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. Ÿ Requires an entity to present separately in other comprehensive income the portion of the change in fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. Ÿ Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the accompanying notes to the financial statements. Ÿ Clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. Ÿ Effective January 1, 2018 on a modified retrospective basis. Ÿ Customers adopted on January 1, 2018 using a modified retrospective approach. Ÿ The adoption of this ASU resulted in a cumulative-effect adjustment that resulted in a $1.0 million reduction in AOCI and a corresponding increase in retained earnings for the same amount. Ÿ The $1.0 million represented the net unrealized gain on Customers' investment in Religare equity securities at December 31, 2017, as disclosed in NOTE 6 - INVESTMENT SECURITIES. Ÿ Customers also refined its calculation to determine the fair value of its held-for- investment loan portfolio for disclosure purposes using an exit price notion as part of adopting this ASU. The refined calculation did not have a significant impact on Customers' fair value disclosures. Issued January 2016 ASU 2014-09, Revenue from Contracts with Customers (Topic 606) Issued May 2014 Ÿ Supersedes the revenue recognition requirements in ASC 605. Ÿ Requires an entity to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Ÿ The amendment includes a five-step process to assist an entity in achieving the main principle(s) of revenue recognition under ASC 605. Ÿ Reframed the structure of the indicators of when an entity is acting as an agent and focused on evidence that an entity is acting as the principal or agent in a revenue transaction. Ÿ Requires additional qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Ÿ Effective January 1 , 2018 and can be either applied retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption (modified retrospective approach). Ÿ Customers adopted on January 1, 2018 on a modified retrospective basis. Ÿ Because the ASU does not apply to revenue associated with leases and financial instruments (including loans and securities), Customers concluded that the new guidance did not have a material impact on the elements of its consolidated statements of operations most closely associated with leases and financial instruments (such as interest income, interest expense and securities gain). Ÿ Customers has identified its deposit-related fees, service charges, debit and prepaid card interchange income and university fees to be within the scope of the standard. Ÿ Customers has also completed its review of the related contracts and its evaluation of certain costs related to these revenue streams and determined that its debit and prepaid card interchange income, previously reported on a gross basis for periods prior to adoption, will need to be presented on a net basis under this ASU, as Customers is the agent. Ÿ The adoption of this ASU, did not have a significant impact on Customers' financial condition, results of operations and consolidated financial statements. Additional discussion related to the adoption and the required quantitative and qualitative disclosures are included in NOTE 13 - NON-INTEREST REVENUES. Accounting Standards Issued But Not Yet Adopted Standard Summary of guidance Effects on Financial Statements ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-employee Share-Based Payment Accounting Ÿ 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. Ÿ 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. Ÿ 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). Ÿ 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. Ÿ Effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. Ÿ Customers currently does not grant share-based payment awards to non-employees and, accordingly, does not expect the adoption of this ASU to have a significant impact on its financial condition, results of operations and consolidated financial statements; however, Customers will continue to evaluate the potential impact of this ASU through the adoption date. Issued June 2018 ASU 2017-11, Accounting for Certain Financial Instruments with Down Round Features Ÿ Changes the classification analysis of certain equity-linked financial instruments (or embedded features) with down round features. Ÿ 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. Ÿ 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 earnings per share ("EPS"). Ÿ Effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Ÿ Customers currently does not have any equity-linked financial instruments (or embedded features) with down round features and, accordingly, does not expect the adoption of this ASU to have a significant impact on its financial condition, results of operations and consolidated financial statements; however, Customers will continue to evaluate the potential impact of this ASU through the adoption date. Issued July 2017 ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities Ÿ Requires that premiums for certain callable debt securities held be amortized to their earliest call date. Ÿ Effective for Customers beginning after December 15, 2018, with early adoption permitted. Ÿ Adoption of this new guidance must be applied on a modified retrospective approach. Ÿ Customers currently has an immaterial amount of callable debt securities purchased at a premium and, accordingly, does not expect the adoption of this ASU to have a significant impact on its financial condition, results of operations and consolidated financial statements; however, Customers will continue to evaluate the potential impact through the adoption date. Issued March 2017 Accounting Standards Issued But Not Yet Adopted (continued) Standard Summary of guidance Effects on Financial Statements ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments Ÿ Requires an entity to utilize a new impairment model known as the current expected credit loss ("CECL") 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 purchased credit-impaired debt securities and loans. Ÿ Effective beginning after December 15, 2019 with early adoption permitted. Ÿ Adoption can 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 is currently evaluating the impact of this ASU, continuing its implementation efforts across the company and reviewing the loss modeling requirements consistent with lifetime expected loss estimates. Ÿ Customers expects that the new model will include different assumptions used in calculating credit losses, such as estimating losses over the estimated life of a financial asset and will consider expected future changes in macroeconomic conditions. Ÿ The adoption of this ASU may result in an increase to Customers' allowance for loan losses which will depend upon the nature and characteristics of Customers' loan portfolio at the adoption date, as well as the macroeconomic conditions and forecasts at that date. Ÿ Customers currently does not intend to early adopt this new guidance. Issued June 2016 ASU 2016-02, Leases Ÿ Supersedes the current lease accounting guidance for both lessees and lessors under ASC 840, Leases. Ÿ From the lessee's perspective, the new standard establishes a right-of-use ("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. Ÿ Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement for lessees. Ÿ This ASU will require 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. Ÿ Effective beginning after December 15, 2018 with early adoption permitted. Ÿ A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. Ÿ 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. Ÿ Customers is currently evaluating the impact of this ASU on its financial condition and results of operations and expects to recognize right-of-use assets and lease liabilities for substantially all of its operating lease commitments based on the present value of unpaid lease payments as of the date of adoption. Ÿ Customers expects to apply the new transition option under ASU 2018-11. Ÿ Customers does not intend to early adopt this ASU. Issued February 2016
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 financial instruments lack an available trading market as characterized by a willing buyer and a willing seller engaging in an exchange transaction. For fair value disclosure purposes, Customers utilized certain fair value measurement criteria under ASC Topic 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 adjustments to inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
Impaired Loans	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.
Derivatives	Risk Management Objectives of Using Derivatives Customers is exposed to certain risks arising from both its business operations and economic conditions. Customers manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and durations of its assets and liabilities. Specifically, Customers enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value 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. 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 is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. To date, such derivatives were used to hedge the variable cash flows associated with the forecasted issuances of debt.

Spin-Off and Merger (Tables)

Spin-Off and Merger (Tables)	6 Months Ended
	Jun. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations Income Statement and Balance Sheet	The following tables summarize the effect of the reclassification of BankMobile from held for sale to held and used on the previously reported consolidated statements of income for the three and six months ended June 30, 2017 : Three Months Ended June 30, 2017 (amounts in thousands) As Previously Reported Effect of Reclassification From Held For Sale to Held and Used After Reclassification Interest income $ 93,852 $ — $ 93,852 Interest expense 25,236 10 25,246 Net interest income 68,616 (10 ) 68,606 Provision for loan losses 535 — 535 Non-interest income 6,971 11,420 18,391 Non-interest expense 30,567 19,846 50,413 Income from continuing operations before income taxes 44,485 (8,436 ) 36,049 Provision for income taxes 15,533 (3,206 ) 12,327 Net income from continuing operations 28,952 (5,230 ) 23,722 Loss from discontinued operations before income taxes (8,436 ) 8,436 — Income tax benefit from discontinued operations (3,206 ) 3,206 — Net loss from discontinued operations (5,230 ) 5,230 — Net income 23,722 — 23,722 Preferred stock dividends 3,615 — 3,615 Net income available to common shareholders $ 20,107 $ — $ 20,107 Six Months Ended June 30, 2017 (amounts in thousands) As Previously Reported Effect of Reclassification From Held For Sale to Held and Used After Reclassification Interest income $ 176,946 $ — $ 176,946 Interest expense 45,906 16 45,922 Net interest income 131,040 (16 ) 131,024 Provision for loan losses 3,585 — 3,585 Non-interest income 12,398 28,746 41,144 Non-interest expense 60,714 39,064 99,778 Income from continuing operations before income taxes 79,139 (10,334 ) 68,805 Provision for income taxes 23,263 (3,927 ) 19,336 Net income from continuing operations 55,876 (6,407 ) 49,469 Loss from discontinued operations before income taxes (10,334 ) 10,334 — Income tax benefit from discontinued operations (3,927 ) 3,927 — Net loss from discontinued operations (6,407 ) 6,407 — Net income 49,469 — 49,469 Preferred stock dividends 7,229 — 7,229 Net income available to common shareholders $ 42,240 $ — $ 42,240

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2018
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. Three Months Ended Six Months Ended 2018 2017 2018 2017 (amounts in thousands, except share and per share data) Net income available to common shareholders $ 20,048 $ 20,107 $ 40,575 $ 42,240 Weighted-average number of common shares outstanding - basic 31,564,893 30,641,554 31,495,082 30,524,955 Share-based compensation plans 807,258 1,910,634 823,245 2,129,773 Warrants 8,511 17,464 8,566 27,318 Weighted-average number of common shares - diluted 32,380,662 32,569,652 32,326,893 32,682,046 Basic earnings per common share $ 0.64 $ 0.66 $ 1.29 $ 1.38 Diluted earnings per common share $ 0.62 $ 0.62 $ 1.26 $ 1.29
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. Three Months Ended Six Months Ended 2018 2017 2018 2017 Anti-dilutive securities: Share-based compensation awards 1,069,225 288,325 1,069,225 282,725 Warrants — 52,242 — 52,242 Total anti-dilutive securities 1,069,225 340,567 1,069,225 334,967

Changes in Accumulated Other 24

Changes in Accumulated Other Comprehensive Income (Loss) By Component (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (loss)	The following tables present the changes in accumulated other comprehensive income (loss) by component for the three and six months ended June 30, 2018 and 2017 . All amounts are presented net of tax. Amounts in parentheses indicate reductions to accumulated other comprehensive income. Three Months Ended June 30, 2018 Available-for-sale debt securities (amounts in thousands) Unrealized Gains (Losses) Foreign Currency Items Total Unrealized Gains (Losses) Unrealized Total Balance - March 31, 2018 $ (26,691 ) $ — $ (26,691 ) $ 503 $ (26,188 ) Other comprehensive income (loss) before reclassifications (9,020 ) — (9,020 ) 1,403 (7,617 ) Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) — — — (192 ) (192 ) Net current-period other comprehensive income (loss) (9,020 ) — (9,020 ) 1,211 (7,809 ) Balance - June 30, 2018 $ (35,711 ) $ — $ (35,711 ) $ 1,714 $ (33,997 ) Six Months Ended June 30, 2018 Available-for-sale securities (amounts in thousands) Unrealized Gains (Losses) Foreign Currency Items Total Unrealized Gains (Losses) Unrealized Total Balance - December 31, 2017 $ (249 ) $ 88 $ (161 ) $ (198 ) $ (359 ) Reclassification of the income tax effects of the Tax Cuts and Jobs Act (2) (256 ) — (256 ) (42 ) (298 ) Reclassification of net unrealized gains on equity securities (2) (953 ) (88 ) (1,041 ) — (1,041 ) Balance after reclassification adjustments on January 1, 2018 (1,458 ) — (1,458 ) (240 ) (1,698 ) Other comprehensive income (loss) before reclassifications (34,253 ) — (34,253 ) 2,049 (32,204 ) Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) — — — (95 ) (95 ) Net current-period other comprehensive income (loss) (34,253 ) — (34,253 ) 1,954 (32,299 ) Balance - June 30, 2018 $ (35,711 ) $ — $ (35,711 ) $ 1,714 $ (33,997 ) (1) Reclassification amounts for cash flow hedges are reported as interest expense on FHLB advances on the consolidated statements of income. (2) 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. See NOTE 3 - SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION for more information. Three Months Ended June 30, 2017 (amounts in thousands) Unrealized Gains (Losses) on Available-For-Sale Debt Securities Unrealized Total Balance - March 31, 2017 $ (3,366 ) $ (1,506 ) $ (4,872 ) Other comprehensive income (loss) before reclassifications 12,130 (420 ) 11,710 Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) (1,942 ) 468 (1,474 ) Net current-period other comprehensive income 10,188 48 10,236 Balance - June 30, 2017 $ 6,822 $ (1,458 ) $ 5,364 Six Months Ended June 30, 2017 (amounts in thousands) Unrealized Gains (Losses) on Available-For-Sale Debt Securities Unrealized Total Balance - December 31, 2016 $ (2,681 ) $ (2,211 ) $ (4,892 ) Other comprehensive income (loss) before reclassifications 11,445 (219 ) 11,226 Amounts reclassified from accumulated other comprehensive income (loss) to net income (1) (1,942 ) 972 (970 ) Net current-period other comprehensive income 9,503 753 10,256 Balance - June 30, 2017 $ 6,822 $ (1,458 ) $ 5,364 (1) Reclassification amounts for available-for-sale debt securities are reported as gain on sale of investment securities on the consolidated statements of income. Reclassification amounts for cash flow hedges are reported as interest expense on FHLB advances on the consolidated statements of income.

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 and December 31, 2017 are summarized in the tables below: June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (amounts in thousands) Available-for-Sale Debt Securities: Agency-guaranteed residential mortgage-backed securities $ 490,425 $ — $ (13,862 ) $ 476,563 Agency-guaranteed commercial real estate mortgage-backed securities 334,232 — (13,859 ) 320,373 Corporate notes 381,545 798 (21,335 ) 361,008 Available-for-Sale Debt Securities $ 1,206,202 $ 798 $ (49,056 ) 1,157,944 Equity Securities (1) 3,056 Total Investment Securities, at Fair Value $ 1,161,000 (1) Includes equity securities issued by a foreign entity that are being measured at fair value with changes in fair value recognized directly in earnings effective January 1, 2018 as a result of adopting ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (see NOTE 3 - SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION for additional information related to the adoption of this new standard). December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (amounts in thousands) Available-for-Sale Securities: Agency-guaranteed residential mortgage-backed securities $ 186,221 $ 36 $ (2,799 ) $ 183,458 Agency-guaranteed commercial real estate mortgage-backed securities 238,809 432 (769 ) 238,472 Corporate notes (1) 44,959 1,130 — 46,089 Equity securities (2) 2,311 1,041 — 3,352 Total Available-for-Sale Securities, at Fair Value $ 472,300 $ 2,639 $ (3,568 ) $ 471,371 (1) Includes subordinated debt issued by other bank holding companies. (2) Includes equity securities issued by a foreign entity.
Summary of Available-for-Sale Debt Securities by Stated Maturity	The following table shows debt investment securities by stated maturity. Investment securities backed by mortgages 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: June 30, 2018 Amortized Cost Fair Value (amounts in thousands) Due in one year or less $ — $ — Due after one year through five years — — Due after five years through ten years 179,413 171,214 Due after ten years 202,132 189,794 Agency-guaranteed residential mortgage-backed securities 490,425 476,563 Agency-guaranteed commercial real estate mortgage-backed securities 334,232 320,373 Total debt securities $ 1,206,202 $ 1,157,944
Available-for-sale Securities	Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (amounts in thousands) Proceeds from sale of available-for-sale securities $ — $ 115,982 $ — $ 115,982 Gross gains $ — $ 3,183 $ — $ 3,183 Gross losses — — — — Net gains (losses) $ — $ 3,183 $ — $ 3,183
Gross Unrealized Losses and Fair Value, Aggregated by Investment Category	Gross unrealized losses and fair value of Customers' available for sale debt investment securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (amounts in thousands) Available-for-Sale Debt Securities: Agency-guaranteed residential mortgage-backed securities $ 416,002 $ (10,256 ) $ 60,561 $ (3,606 ) $ 476,563 $ (13,862 ) Agency-guaranteed commercial real estate mortgage-backed securities 314,525 (13,532 ) 5,848 (327 ) 320,373 (13,859 ) Corporate notes 315,249 (21,335 ) — — 315,249 (21,335 ) Total $ 1,045,776 $ (45,123 ) $ 66,409 $ (3,933 ) $ 1,112,185 $ (49,056 ) December 31, 2017 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (amounts in thousands) Available-for-Sale Debt Securities: Agency-guaranteed residential mortgage-backed securities $ 104,861 $ (656 ) $ 66,579 $ (2,143 ) $ 171,440 $ (2,799 ) Agency-guaranteed commercial real estate mortgage-backed securities 115,970 (740 ) 6,151 (29 ) 122,121 (769 ) Total $ 220,831 $ (1,396 ) $ 72,730 $ (2,172 ) $ 293,561 $ (3,568 )

Loans Held for Sale (Tables)

Loans Held for Sale (Tables)	6 Months Ended
	Jun. 30, 2018
Receivables Held-for-sale [Abstract]
Composition of Loans Held for Sale	The composition of loans held for sale as of June 30, 2018 and December 31, 2017 was as follows: June 30, 2018 December 31, 2017 (amounts in thousands) Commercial loans: Mortgage warehouse loans, at fair value $ 1,930,738 $ 1,793,408 Multi-family loans at lower of cost or fair value — 144,191 Total commercial loans held for sale 1,930,738 1,937,599 Consumer loans: Residential mortgage loans, at fair value 1,043 1,886 Loans held for sale $ 1,931,781 $ 1,939,485

Loans Receivable and Allowanc27

Loans Receivable and Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Schedule of Loans Receivable	The following table presents loans receivable as of June 30, 2018 and December 31, 2017 . June 30, 2018 December 31, 2017 (amounts in thousands) Commercial: Multi-family $ 3,542,770 $ 3,502,381 Commercial and industrial (including owner occupied commercial real estate) 1,811,751 1,633,818 Commercial real estate non-owner occupied 1,155,998 1,218,719 Construction 88,141 85,393 Total commercial loans 6,598,660 6,440,311 Consumer: Residential real estate 493,222 234,090 Manufactured housing 85,328 90,227 Other 3,874 3,547 Total consumer loans 582,424 327,864 Total loans receivable 7,181,084 6,768,175 Deferred costs and unamortized premiums, net 642 83 Allowance for loan losses (38,288 ) (38,015 ) Loans receivable, net of allowance for loan losses $ 7,143,438 $ 6,730,243
Loans Receivable by Loan Type and Performance Status	The following tables summarize loans receivable by loan type and performance status as of June 30, 2018 and December 31, 2017 : June 30, 2018 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 (4) (amounts in thousands) Multi-family $ — $ — $ — $ 1,343 $ 3,539,640 $ 1,787 $ 3,542,770 Commercial and industrial 1,087 — 1,087 13,683 1,251,148 602 1,266,520 Commercial real estate - owner occupied — — — 718 534,923 9,590 545,231 Commercial real estate - non-owner occupied — — — 2,536 1,148,581 4,881 1,155,998 Construction — — — — 88,141 — 88,141 Residential real estate 2,174 — 2,174 5,606 480,381 5,061 493,222 Manufactured housing (5) 2,977 2,661 5,638 2,015 75,250 2,425 85,328 Other consumer 56 — 56 94 3,496 228 3,874 Total $ 6,294 $ 2,661 $ 8,955 $ 25,995 $ 7,121,560 $ 24,574 $ 7,181,084 December 31, 2017 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 (4) (amounts in thousands) Multi-family $ 4,900 $ — $ 4,900 $ — $ 3,495,600 $ 1,881 $ 3,502,381 Commercial and industrial 103 — 103 17,392 1,130,831 764 1,149,090 Commercial real estate - owner occupied 202 — 202 1,453 472,501 10,572 484,728 Commercial real estate - non-owner occupied 93 — 93 160 1,213,216 5,250 1,218,719 Construction — — — — 85,393 — 85,393 Residential real estate 7,628 — 7,628 5,420 215,361 5,681 234,090 Manufactured housing (5) 4,028 2,743 6,771 1,959 78,946 2,551 90,227 Other consumer 116 — 116 31 3,184 216 3,547 Total $ 17,070 $ 2,743 $ 19,813 $ 26,415 $ 6,695,032 $ 26,915 $ 6,768,175 (1) Includes past due loans that are accruing interest because collection is considered probable. (2) Loans 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. Because of 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 allowance for loan losses. (5) Manufactured housing loans purchased in 2010 are supported by cash reserves held at the Bank that are used to fund past-due payments when the loan becomes 90 days or more delinquent. Subsequent purchases are subject to varying provisions in the event of borrowers’ delinquencies.
Schedule of Allowance for Loan Losses	The changes in the allowance for loan losses for the three and six months ended June 30, 2018 and 2017 , and the loans and allowance for loan losses by loan class based on impairment-evaluation method as of June 30, 2018 and December 31, 2017 are presented in the tables below. Three Months Ended June 30, 2018 Multi-family Commercial and Industrial Commercial Real Estate Owner Occupied Commercial Construction Residential Manufactured Other Consumer Total (amounts in thousands) Ending Balance, March 31, 2018 $ 12,545 $ 11,737 $ 3,525 $ 7,233 $ 921 $ 3,179 $ 176 $ 183 $ 39,499 Charge-offs — (174 ) (483 ) — — (42 ) — (462 ) (1,161 ) Recoveries — 140 326 — 209 56 — 3 734 Provision for loan losses (476 ) 555 (380 ) (535 ) (138 ) (285 ) (27 ) 502 (784 ) Ending Balance, June 30, 2018 $ 12,069 $ 12,258 $ 2,988 $ 6,698 $ 992 $ 2,908 $ 149 $ 226 $ 38,288 Six Months Ended June 30, 2018 Ending Balance, December 31, 2017 $ 12,168 $ 10,918 $ 3,232 $ 7,437 $ 979 $ 2,929 $ 180 $ 172 $ 38,015 Charge-offs — (224 ) (501 ) — — (407 ) — (718 ) (1,850 ) Recoveries — 175 326 — 220 63 — 6 790 Provision for loan losses (99 ) 1,389 (69 ) (739 ) (207 ) 323 (31 ) 766 1,333 Ending Balance, June 30, 2018 $ 12,069 $ 12,258 $ 2,988 $ 6,698 $ 992 $ 2,908 $ 149 $ 226 $ 38,288 As of June 30, 2018 Loans: Individually evaluated for impairment $ 1,343 $ 13,750 $ 759 $ 2,536 $ — $ 8,775 $ 10,372 $ 94 $ 37,629 Collectively evaluated for impairment 3,539,640 1,252,168 534,882 1,148,581 88,141 479,386 72,531 3,552 7,118,881 Loans acquired with credit deterioration 1,787 602 9,590 4,881 — 5,061 2,425 228 24,574 $ 3,542,770 $ 1,266,520 $ 545,231 $ 1,155,998 $ 88,141 $ 493,222 $ 85,328 $ 3,874 $ 7,181,084 Allowance for loan losses: Individually evaluated for impairment $ — $ 1,062 $ 1 $ — $ — $ 313 $ 5 $ — $ 1,381 Collectively evaluated for impairment 12,069 10,749 2,987 4,334 992 2,106 81 154 33,472 Loans acquired with credit deterioration — 447 — 2,364 — 489 63 72 3,435 $ 12,069 $ 12,258 $ 2,988 $ 6,698 $ 992 $ 2,908 $ 149 $ 226 $ 38,288 Three Months Ended June 30, 2017 Multi-family Commercial and Industrial Commercial Real Estate Owner Occupied Commercial Construction Residential Manufactured Other Consumer Total (amounts in thousands) Ending Balance, March 31, 2017 $ 12,283 $ 13,009 $ 2,394 $ 7,847 $ 885 $ 3,080 $ 284 $ 101 $ 39,883 Charge-offs — (1,849 ) — (4 ) — (69 ) — (226 ) (2,148 ) Recoveries — 68 9 — 49 6 — 56 188 Provision for loan losses (255 ) 357 573 (57 ) (218 ) (22 ) (16 ) 173 535 Ending Balance, June 30, 2017 $ 12,028 $ 11,585 $ 2,976 $ 7,786 $ 716 $ 2,995 $ 268 $ 104 $ 38,458 Six Months Ended June 30, 2017 Ending Balance, December 31, 2016 $ 11,602 $ 11,050 $ 2,183 $ 7,894 $ 840 $ 3,342 $ 286 $ 118 $ 37,315 Charge-offs — (2,047 ) — (408 ) — (290 ) — (246 ) (2,991 ) Recoveries — 283 9 — 130 27 — 100 549 Provision for loan losses 426 2,299 784 300 (254 ) (84 ) (18 ) 132 3,585 Ending Balance, June 30, 2017 $ 12,028 $ 11,585 $ 2,976 $ 7,786 $ 716 $ 2,995 $ 268 $ 104 $ 38,458 As of December 31, 2017 Loans: Individually evaluated for impairment $ — $ 17,461 $ 1,448 $ 160 $ — $ 9,247 $ 10,089 $ 30 $ 38,435 Collectively evaluated for impairment 3,500,500 1,130,865 472,708 1,213,309 85,393 219,162 77,587 3,301 6,702,825 Loans acquired with credit deterioration 1,881 764 10,572 5,250 — 5,681 2,551 216 26,915 $ 3,502,381 $ 1,149,090 $ 484,728 $ 1,218,719 $ 85,393 $ 234,090 $ 90,227 $ 3,547 $ 6,768,175 Allowance for loan losses: Individually evaluated for impairment $ — $ 650 $ 642 $ — $ — $ 155 $ 4 $ — $ 1,451 Collectively evaluated for impairment 12,168 9,804 2,580 4,630 979 2,177 82 117 32,537 Loans acquired with credit deterioration — 464 10 2,807 — 597 94 55 4,027 $ 12,168 $ 10,918 $ 3,232 $ 7,437 $ 979 $ 2,929 $ 180 $ 172 $ 38,015
Summary of Recorded Investment Net Charge-Offs, Unpaid Principal Balance and Related Allowance for Impaired Loans	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 June 30, 2018 and December 31, 2017 and the average recorded investment and interest income recognized for the three and six months ended June 30, 2018 and 2017 . Purchased-credit-impaired loans are considered to be performing and are not included in the tables below. June 30, 2018 Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Recorded Investment Net of Charge offs Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Interest (amounts in thousands) With no recorded allowance: Multi-family $ 1,343 $ 1,343 $ — $ 672 $ 8 $ 448 $ 8 Commercial and industrial 5,642 5,889 — 5,736 2 6,870 2 Commercial real estate owner occupied 718 1,201 — 664 — 713 — Commercial real estate non-owner occupied 2,536 2,648 — 1,390 8 980 8 Other consumer 94 94 — 96 — 74 — Residential real estate 4,301 4,546 — 3,959 2 3,849 2 Manufactured housing 10,144 10,144 — 10,015 146 9,963 277 With an allowance recorded: Commercial and industrial 8,108 8,292 1,062 8,283 11 8,296 12 Commercial real estate owner occupied 41 41 1 455 1 517 2 Residential real estate 4,474 4,479 313 4,550 38 4,906 63 Manufactured housing 228 228 5 225 6 225 6 Total $ 37,629 $ 38,905 $ 1,381 $ 36,045 $ 222 $ 36,841 $ 380 December 31, 2017 Three Months Ended June 30, 2017 Six Months Ended June 30, 2017 Recorded Investment Net of Charge offs Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Interest (amounts in thousands) With no recorded allowance: Commercial and industrial $ 9,138 $ 9,287 $ — $ 6,678 $ 46 $ 5,251 $ 96 Commercial real estate owner occupied 806 806 — 1,739 — 1,563 3 Commercial real estate non-owner occupied 160 272 — 884 — 1,257 2 Other consumer 30 30 — 56 — 56 — Residential real estate 3,628 3,801 — 2,660 — 4,001 1 Manufactured housing 9,865 9,865 — 10,074 152 9,937 293 With an allowance recorded: Commercial and industrial 8,323 8,506 650 7,209 — 6,846 22 Commercial real estate - owner occupied 642 642 642 839 1 839 2 Commercial real estate non-owner occupied — — — 114 — 126 — Residential real estate 5,619 5,656 155 4,953 45 3,399 84 Manufactured housing 224 224 4 216 5 144 8 Total $ 38,435 $ 39,089 $ 1,451 $ 35,422 $ 249 $ 33,419 $ 511
Summary of Loans Modified in Troubled Debt Restructurings and Related Recorded Investment	The following table provides, by loan type, the number of loans modified in troubled debt restructurings, and the related recorded investment, during the three and six months ended June 30, 2018 and 2017 . Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Commercial and industrial — $ — 2 $ 5,855 Manufactured housing 14 450 9 320 Residential real estate 1 200 — — Other consumer 1 13 — — Total loans 16 $ 663 11 $ 6,175 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Commercial and industrial — $ — 3 $ 6,203 Manufactured housing 23 772 29 1,175 Residential real estate 1 200 — — Other consumer 1 13 — — Total loans 25 $ 985 32 $ 7,378 The following table presents total TDRs based on loan type and accrual status at June 30, 2018 and December 31, 2017 . Nonaccrual TDRs are included in the reported amount of total non-accrual loans. June 30, 2018 December 31, 2017 Accruing TDRs Nonaccrual TDRs Total Accruing TDRs Nonaccrual TDRs Total (amounts in thousands) Commercial and industrial $ 67 $ 5,415 $ 5,482 $ 63 $ 5,939 $ 6,002 Commercial real estate owner occupied 41 — 41 — — — Manufactured housing 8,357 1,875 10,232 8,130 1,766 9,896 Residential real estate 3,169 485 3,654 3,828 703 4,531 Other consumer — 13 13 — — — Total TDRs $ 11,634 $ 7,788 $ 19,422 $ 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 troubled debt restructuring by type of concession for the three and six months ended June 30, 2018 and 2017 . There were no modifications that involved forgiveness of debt. Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Extensions of maturity 1 $ 56 2 $ 5,855 Interest-rate reductions 15 607 9 320 Total 16 $ 663 11 $ 6,175 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Number Recorded Number Recorded (dollars in thousands) Extensions of maturity 1 $ 56 3 $ 6,203 Interest-rate reductions 24 929 29 1,175 Total 25 $ 985 32 $ 7,378
Changes in Accretable Yield Related to Purchased-credit-impaired Loans	The changes in accretable yield related to purchased-credit-impaired loans for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended June 30, 2018 2017 (amounts in thousands) Accretable yield balance as of March 31, $ 7,663 $ 9,376 Accretion to interest income (516 ) (465 ) Reclassification from nonaccretable difference and disposals, net 256 95 Accretable yield balance as of June 30, $ 7,403 $ 9,006 Six Months Ended June 30, 2018 2017 (amounts in thousands) Accretable yield balance as of December 31, $ 7,825 $ 10,202 Accretion to interest income (854 ) (958 ) Reclassification from nonaccretable difference and disposals, net 432 (238 ) Accretable yield balance as of June 30, $ 7,403 $ 9,006
Credit Ratings of Covered and Non-Covered Loan Portfolio	The following tables present the credit ratings of loans receivable as of June 30, 2018 and December 31, 2017 . June 30, 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) Pass/Satisfactory $ 3,485,669 $ 1,211,934 $ 529,898 $ 1,089,666 $ 88,141 $ — $ — $ — $ 6,405,308 Special Mention 31,001 16,979 8,152 60,943 — — — — 117,075 Substandard 26,100 37,607 7,181 5,389 — — — — 76,277 Performing (1) — — — — — 485,442 77,675 3,724 566,841 Non-performing (2) — — — — — 7,780 7,653 150 15,583 Total $ 3,542,770 $ 1,266,520 $ 545,231 $ 1,155,998 $ 88,141 $ 493,222 $ 85,328 $ 3,874 $ 7,181,084 December 31, 2017 Multi-family Commercial Commercial Commercial Real Estate Non-Owner Occupied Construction Residential Manufactured Other Consumer Total (amounts in thousands) Pass/Satisfactory $ 3,438,554 $ 1,118,889 $ 471,826 $ 1,185,933 $ 85,393 $ — $ — $ — $ 6,300,595 Special Mention 53,873 7,652 5,987 31,767 — — — — 99,279 Substandard 9,954 22,549 6,915 1,019 — — — — 40,437 Performing (1) — — — — — 221,042 81,497 3,400 305,939 Non-performing (2) — — — — — 13,048 8,730 147 21,925 Total $ 3,502,381 $ 1,149,090 $ 484,728 $ 1,218,719 $ 85,393 $ 234,090 $ 90,227 $ 3,547 $ 6,768,175 (1) Includes consumer and other installment loans not subject to risk ratings. (2) Includes loans that are past due and still accruing interest and loans on nonaccrual status.

Regulatory Capital (Tables)

Regulatory Capital (Tables)	6 Months Ended
	Jun. 30, 2018
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 as set forth in the following table: Minimum Capital Levels to be Classified as: Actual Adequacy Capitalized Well Capitalized Basel III Compliant (amounts in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of June 30, 2018: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 735,609 8.611 % $ 384,418 4.500 % N/A N/A $ 544,591 6.375 % Customers Bank $ 1,054,613 12.351 % $ 384,232 4.500 % $ 555,002 6.500 % $ 544,329 6.375 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 953,025 11.156 % $ 512,557 6.000 % N/A N/A $ 672,731 7.875 % Customers Bank $ 1,054,613 12.351 % $ 512,309 6.000 % $ 683,079 8.000 % $ 672,406 7.875 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,072,072 12.550 % $ 683,409 8.000 % N/A N/A $ 843,583 9.875 % Customers Bank $ 1,202,070 14.078 % $ 683,079 8.000 % $ 853,849 10.000 % $ 843,176 9.875 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 953,025 8.866 % $ 429,963 4.000 % N/A N/A $ 429,963 4.000 % Customers Bank $ 1,054,613 9.822 % $ 429,471 4.000 % $ 536,839 5.000 % $ 429,471 4.000 % As of December 31, 2017: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 689,494 8.805 % $ 352,368 4.500 % N/A N/A $ 450,248 5.750 % Customers Bank $ 1,023,564 13.081 % $ 352,122 4.500 % $ 508,621 6.500 % $ 449,934 5.750 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 906,963 11.583 % $ 469,824 6.000 % N/A N/A $ 567,704 7.250 % Customers Bank $ 1,023,564 13.081 % $ 469,496 6.000 % $ 625,994 8.000 % $ 567,307 7.250 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,021,601 13.047 % $ 626,432 8.000 % N/A N/A $ 724,313 9.250 % Customers Bank $ 1,170,666 14.961 % $ 625,994 8.000 % $ 782,493 10.000 % $ 723,806 9.250 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 906,963 8.937 % $ 405,949 4.000 % N/A N/A $ 405,949 4.000 % Customers Bank $ 1,023,564 10.092 % $ 405,701 4.000 % $ 507,126 5.000 % $ 405,701 4.000 %

Disclosures About Fair Value 29

Disclosures About Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The estimated fair values of Customers' financial instruments at June 30, 2018 and December 31, 2017 were as follows. Fair Value Measurements at June 30, 2018 Carrying Amount Estimated Fair Value 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 $ 251,726 $ 251,726 $ 251,726 $ — $ — Debt securities, available for sale 1,157,944 1,157,944 — 1,157,944 — Equity securities 3,056 3,056 3,056 — — Loans held for sale 1,931,781 1,931,781 — 1,931,781 — Loans receivable, net of allowance for loan losses 7,143,438 7,127,315 — — 7,127,315 FHLB, Federal Reserve Bank and other restricted stock 136,066 136,066 — 136,066 — Derivatives 16,247 16,247 — 16,114 133 Liabilities: Deposits $ 7,295,954 $ 7,288,828 $ 5,223,793 $ 2,065,035 $ — Federal funds purchased 105,000 105,000 105,000 — — FHLB advances 2,389,797 2,389,785 1,504,797 884,988 — Other borrowings 186,888 185,364 63,554 121,810 — Subordinated debt 108,929 114,675 — 114,675 — Derivatives 13,698 13,698 — 13,698 — Fair Value Measurements at December 31, 2017 Carrying Amount Estimated Fair Value 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 $ 146,323 $ 146,323 $ 146,323 $ — $ — Investment securities, available for sale 471,371 471,371 3,352 468,019 — Loans held for sale 1,939,485 1,939,659 — 1,795,294 144,365 Loans receivable, net of allowance for loan losses 6,730,243 6,676,763 — — 6,676,763 FHLB, Federal Reserve Bank and other restricted stock 105,918 105,918 — 105,918 — Derivatives 9,752 9,752 — 9,692 60 Liabilities: Deposits $ 6,800,142 $ 6,796,095 $ 4,894,449 $ 1,901,646 $ — Federal funds purchased 155,000 155,000 155,000 — — FHLB advances 1,611,860 1,611,603 881,860 729,743 — Other borrowings 186,497 193,557 65,072 128,485 — Subordinated debt 108,880 115,775 — 115,775 — Derivatives 10,074 10,074 — 10,074 —
Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis	For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at June 30, 2018 and December 31, 2017 were as follows: June 30, 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 debt securities: Agency-guaranteed residential mortgage-backed securities $ — $ 476,563 $ — $ 476,563 Agency-guaranteed commercial mortgage-backed securities — 320,373 — 320,373 Corporate notes — 361,008 — 361,008 Equity securities 3,056 — — 3,056 Derivatives — 16,114 133 16,247 Loans held for sale – fair value option — 1,931,781 — 1,931,781 Total assets - recurring fair value measurements $ 3,056 $ 3,105,839 $ 133 $ 3,109,028 Liabilities Derivatives $ — $ 13,698 $ — $ 13,698 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of reserves of $1,381 $ — $ — $ 11,929 $ 11,929 Other real estate owned — — 1,027 1,027 Total assets - nonrecurring fair value measurements $ — $ — $ 12,956 $ 12,956 December 31, 2017 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 $ — $ 183,458 $ — $ 183,458 Agency-guaranteed commercial real estate mortgage-backed securities — 238,472 — 238,472 Corporate notes — 46,089 — 46,089 Equity securities 3,352 — — 3,352 Derivatives — 9,692 60 9,752 Loans held for sale – fair value option — 1,795,294 — 1,795,294 Total assets - recurring fair value measurements $ 3,352 $ 2,273,005 $ 60 $ 2,276,417 Liabilities Derivatives $ — $ 10,074 $ — $ 10,074 Measured at Fair Value on a Nonrecurring Basis: Assets Impaired loans, net of reserves of $1,451 $ — $ — $ 13,902 $ 13,902 Other real estate owned — — 1,449 1,449 Total assets - nonrecurring fair value measurements $ — $ — $ 15,351 $ 15,351
Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis	The changes in Level 3 assets measured at fair value on a recurring basis for the three and six months ended June 30, 2018 and 2017 are summarized in the tables below. Additional information about residential mortgage loan commitments can be found in NOTE 11 - DERIVATIVES INSTRUMENTS AND HEDGING ACTIVITIES. Residential Mortgage Loan Commitments Three Months Ended June 30, 2018 2017 (amounts in thousands) Balance at March 31 $ 83 $ 95 Issuances 133 102 Settlements (83 ) (95 ) Balance at June 30 $ 133 $ 102 Residential Mortgage Loan Commitments Six Months Ended June 30, 2018 2017 (amounts in thousands) Balance at December 31 $ 60 $ 45 Issuances 216 197 Settlements (143 ) (140 ) Balance at June 30 $ 133 $ 102
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 June 30, 2018 and December 31, 2017 on a recurring and nonrecurring basis for which Customers utilized Level 3 inputs to measure fair value. Quantitative Information about Level 3 Fair Value Measurements June 30, 2018 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (3) (amounts in thousands) Impaired loans $ 11,929 Collateral appraisal (1) Liquidation expenses (2) (8)% Other real estate owned 1,027 Collateral appraisal (1) Liquidation expenses (2) (8)% Residential mortgage loan commitments 133 Adjusted market bid Pull-through rate 90% Quantitative Information about Level 3 Fair Value Measurements December 31, 2017 Fair Value Estimate Valuation Technique Unobservable Input Range (Weighted Average) (3) (amounts in thousands) Impaired loans $ 13,902 Collateral appraisal (1) Liquidation expenses (2) (8)% Other real estate owned 1,449 Collateral appraisal (1) Liquidation expenses (2) (8)% Residential mortgage loan commitments 60 Adjusted market bid Pull-through rate 90% (1) Obtained from approved independent appraisers. Appraisals are current and in compliance with credit policy. The Bank does not generally discount appraisals. (2) Fair value is adjusted for estimated costs to sell based on a percentage of the value as determined by the appraisal. (3) Presented as a percentage of the value determined by appraisal for impaired loans and other real estate owned.

Derivative Instruments and He30

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Financial Instruments	The following tables present the fair value of Customers' derivative financial instruments as well as their presentation on the balance sheet as of June 30, 2018 and December 31, 2017 . June 30, 2018 Derivative Assets Derivative Liabilities Balance Sheet Location Fair Value Balance Sheet Location Fair Value (amounts in thousands) Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ 2,732 Other liabilities $ 416 Total $ 2,732 $ 416 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 13,334 Other liabilities $ 13,148 Credit contracts Other assets 48 Other liabilities 134 Residential mortgage loan commitments Other assets 133 Other liabilities — Total $ 13,515 $ 13,282 December 31, 2017 Derivative Assets Derivative Liabilities Balance Sheet Balance Sheet Location Fair Value Location Fair Value (amounts in thousands) Derivatives designated as cash flow hedges: Interest rate swaps Other assets $ 816 Other liabilities $ 1,140 Total $ 816 $ 1,140 Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 8,776 Other liabilities $ 8,897 Credit contracts Other assets 100 Other liabilities 37 Residential mortgage loan commitments Other assets 60 Other liabilities — Total $ 8,936 $ 8,934
Effect of Derivative Financial Instruments on Comprehensive Income	The following tables present the effect of Customers' derivative financial instruments on comprehensive income for the three and six months ended June 30, 2018 and 2017 . Three Months Ended June 30, 2018 Income Statement Location Amount of Income (Loss) Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ (51 ) Credit contracts Other non-interest income (15 ) Residential mortgage loan commitments Mortgage banking income 50 Total $ (16 ) Three Months Ended June 30, 2017 Income Statement Location Amount of Income (Loss) Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ (145 ) Credit contracts Other non-interest income 1 Residential mortgage loan commitments Mortgage banking income 7 Total $ (137 ) Six Months Ended June 30, 2018 Income Statement Location Amount of Income (Loss) Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 334 Credit contracts Other non-interest income (38 ) Residential mortgage loan commitments Mortgage banking income 73 Total $ 369 Six Months Ended June 30, 2017 Income Statement Location Amount of Income Recognized in Earnings (amounts in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other non-interest income $ 338 Credit contracts Other non-interest income 1 Residential mortgage loan commitments Mortgage banking income 57 Total $ 396 Three Months Ended June 30, 2018 Amount of Gain Recognized in OCI on Derivatives (1) Location of Gain (Loss) Reclassified from Accumulated OCI into Income Amount of Gain Reclassified from Accumulated OCI into Income (amounts in thousands) Derivatives in cash flow hedging relationships: Interest rate swaps $ 1,403 Interest expense $ 259 Three Months Ended June 30, 2017 Amount of Loss Recognized in OCI on Derivatives (1) Location of Gain (Loss) Reclassified from Accumulated OCI into Income Amount of Loss Reclassified from Accumulated OCI into Income (amounts in thousands) Derivatives in cash flow hedging relationships: Interest rate swaps $ (420 ) Interest expense $ (767 ) Six Months Ended June 30, 2018 Amount of Gain Location of Gain (Loss) Amount of Gain (amounts in thousands) Derivative in cash flow hedging relationships: Interest rate swaps $ 2,049 Interest expense $ 128 Six Months Ended June 30, 2017 Amount of Loss Location of Gain (Loss) Amount of Loss (amounts in thousands) Derivative in cash flow hedging relationships: Interest rate swaps $ (219 ) Interest expense $ (1,594 ) (1) Amounts presented are net of taxes. See NOTE 5 - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) for total effect on other comprehensive income (loss) from derivatives designated as cash flow hedges for the periods presented.
Summary of Offsetting of Financial Assets and Derivative Assets	Offsetting of Financial Assets and Derivative Assets At June 30, 2018 Gross Amount of Recognized Assets Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Assets Presented in the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount Financial Instruments Cash Collateral Received (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 14,921 $ — $ 14,921 $ — $ 11,170 $ 3,751 Offsetting of Financial Assets and Derivative Assets At December 31, 2017 Gross Amount of Recognized Assets Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Assets Presented in the Consolidated Balance Sheet Gross Amounts Net Amount Financial Instruments Cash Collateral Received (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 5,930 $ — $ 5,930 $ — $ 5,070 $ 860
Summary of Offsetting of Financial Liabilities and Derivative Liabilities	Offsetting of Financial Liabilities and Derivative Liabilities At December 31, 2017 Gross Amount of Recognized Liabilities Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Liabilities Presented in the Consolidated Balance Sheet Gross Amounts Net Amount Financial Instruments Cash Collateral Pledged (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 5,058 $ — $ 5,058 $ — $ 4,872 $ 186 Offsetting of Financial Liabilities and Derivative Liabilities At June 30, 2018 Gross Amount of Recognized Liabilities Gross Amounts Offset in the Consolidated Balance Sheet Net Amounts of Liabilities Presented in the Consolidated Balance Sheet Gross Amounts Financial Instruments Cash Collateral Pledged Net Amount (amounts in thousands) Description Interest rate swap derivatives with institutional counterparties $ 1,639 $ — $ 1,639 $ — $ 2 $ 1,637

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables present the operating results for Customers' reportable business segments for the three and six month periods ended June 30, 2018 and 2017 . The segment financial results include directly attributable revenues and expenses. Corporate overhead costs are assigned to the Community Business Banking segment as those expenses are expected to continue following the planned spin-off of BankMobile. Similarly, the preferred stock dividends have been allocated in their entirety to the Community Business Banking segment. The tax benefit assigned to BankMobile was based on an estimated effective tax rate of 24.57% for 2018 and 38.00% for 2017 , respectively. Three Months Ended June 30, 2018 Community Business Banking BankMobile Consolidated Interest income (1) $ 104,110 $ 3,529 $ 107,639 Interest expense 40,182 135 40,317 Net interest income 63,928 3,394 67,322 Provision for loan losses (1,247 ) 463 (784 ) Non-interest income 7,465 8,662 16,127 Non-interest expense 37,721 16,029 53,750 Income (loss) before income tax expense (benefit) 34,919 (4,436 ) 30,483 Income tax expense (benefit) 7,910 (1,090 ) 6,820 Net income (loss) 27,009 (3,346 ) 23,663 Preferred stock dividends 3,615 — 3,615 Net income (loss) available to common shareholders $ 23,394 $ (3,346 ) $ 20,048 Three Months Ended June 30, 2017 Community Business Banking BankMobile Consolidated Interest income (1) $ 91,107 $ 2,745 $ 93,852 Interest expense 25,228 18 25,246 Net interest income 65,879 2,727 68,606 Provision for loan losses 535 — 535 Non-interest income 6,971 11,420 18,391 Non-interest expense 30,567 19,846 50,413 Income (loss) before income tax expense (benefit) 41,748 (5,699 ) 36,049 Income tax expense (benefit) 14,493 (2,166 ) 12,327 Net income (loss) 27,255 (3,533 ) 23,722 Preferred stock dividends 3,615 — 3,615 Net income (loss) available to common shareholders $ 23,640 $ (3,533 ) $ 20,107 (1) - Amounts reported include funds transfer pricing of $3.5 million and $2.7 million for the three months ended June 30, 2018 and 2017 , respectively, credited to BankMobile for the value provided to the Community Business Banking segment for the use of low/no cost deposits. Six Months Ended June 30, 2018 Community Business Banking BankMobile Consolidated Interest income (1) $ 196,664 $ 7,940 $ 204,604 Interest expense 72,100 151 72,251 Net interest income 124,564 7,789 132,353 Provision for loan losses 627 706 1,333 Non-interest income 15,904 21,133 37,037 Non-interest expense 72,052 33,979 106,031 Income (loss) before income tax expense (benefit) 67,789 (5,763 ) 62,026 Income tax expense (benefit) 15,638 (1,416 ) 14,222 Net income (loss) 52,151 (4,347 ) 47,804 Preferred stock dividends 7,229 — 7,229 Net income (loss) available to common shareholders $ 44,922 $ (4,347 ) $ 40,575 As of June 30, 2018 Goodwill and other intangibles $ 3,629 $ 13,521 $ 17,150 Total assets $ 11,017,272 $ 75,574 $ 11,092,846 Total deposits $ 6,876,688 $ 419,266 $ 7,295,954 Total non-deposit liabilities $ 2,843,360 $ 17,305 $ 2,860,665 Six Months Ended June 30, 2017 Community Business Banking BankMobile Consolidated Interest income (1) $ 169,938 $ 7,008 $ 176,946 Interest expense 45,883 39 45,922 Net interest income 124,055 6,969 131,024 Provision for loan losses 3,585 — 3,585 Non-interest income 12,398 28,746 41,144 Non-interest expense 60,714 39,064 99,778 Income (loss) before income tax expense (benefit) 72,154 (3,349 ) 68,805 Income tax expense (benefit) 20,609 (1,273 ) 19,336 Net income (loss) 51,545 (2,076 ) 49,469 Preferred stock dividends 7,229 — 7,229 Net income (loss) available to common shareholders $ 44,316 $ (2,076 ) $ 42,240 As of June 30, 2017 Goodwill and other intangibles $ 3,633 $ 13,982 $ 17,615 Total assets $ 10,815,752 $ 67,796 $ 10,883,548 Total deposits $ 7,021,922 $ 453,441 $ 7,475,363 Total non-deposit liabilities $ 2,481,618 $ 16,278 $ 2,497,896 (1) - Amounts reported include funds transfer pricing of $7.9 million and $7.0 million for the six months ended June 30, 2018 and 2017 , respectively, credited to BankMobile for the value provided to the Community Business Banking segment for the use of low/no cost deposits.

Non-Interest Revenues (Tables)

Non-Interest Revenues (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles
Disaggregation of Revenue	The following tables present Customers' non-interest revenues affected by ASU 2014-09 by business segment for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, 2018 Community Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and Card Revenue $ 183 $ 6,199 $ 6,382 Deposit Fees 294 1,338 1,632 University Fees - Card and Disbursement Fees — 185 185 Total revenue recognized at point in time 477 7,722 8,199 Revenue recognized over time: University Fees - Subscription Revenue — 907 907 Total revenue recognized over time — 907 907 Total revenue from contracts with customers $ 477 $ 8,629 $ 9,106 Three Months Ended June 30, 2017 Community Business Banking BankMobile Consolidated Revenue from contracts with customers: Revenue recognized at point in time: Interchange and Card Revenue $ 126 $ 8,522 $ 8,648 Deposit Fees 258 1,875 2,133 University Fees - Card and Disbursement Fees — 206 206 Total revenue recognized at point in time 384 10,603 10,987 Revenue recognized over time: University Fees - Subscription Revenue — 784 784 Total revenue recognized over time — 784 784 Total revenue from contracts with customers $ 384 $ 11,387 $ 11,771

Description of the Business - A

Description of the Business - Additional Information (Detail)	Jun. 30, 2018Branch
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of branches (branch)	13

Spin-Off and Merger - Narrative

Spin-Off and Merger - Narrative (Details) - Flagship Community Bank - Spinoff - USD ($) $ in Millions	Nov. 17, 2017	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for sale of deposits and associated assets	$ 10
Common Stock
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of stock, percentage of ownership after transaction	50.00%
Escrow Deposit	$ 1
Cash and Cash Equivalents | Common Stock
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Escrow Deposit		$ 1

Spin-Off and Merger - Income St

Spin-Off and Merger - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense	$ 6,820	$ 12,327	$ 14,222	$ 19,336
Net income (loss)	23,663	23,722	47,804	49,469
Preferred stock dividends	3,615	3,615	7,229	7,229
Net income (loss) available to common shareholders	$ 20,048	20,107	$ 40,575	42,240
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest income		93,852		176,946
Interest expense		25,246		45,922
Net interest income		68,606		131,024
Provision for loan losses		535		3,585
Non-interest income		18,391		41,144
Non-interest expense		50,413		99,778
Income from continuing operations before income taxes		36,049		68,805
Income tax expense		12,327		19,336
Net income from continuing operations		23,722		49,469
Loss from discontinued operations before income tax benefit		0		0
Income tax benefit from discontinued operations		0		0
Net loss from discontinued operations		0		0
Net income (loss)		23,722		49,469
Preferred stock dividends		3,615		7,229
Net income (loss) available to common shareholders		20,107		42,240
Previously Reported | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest income		93,852		176,946
Interest expense		25,236		45,906
Net interest income		68,616		131,040
Provision for loan losses		535		3,585
Non-interest income		6,971		12,398
Non-interest expense		30,567		60,714
Income from continuing operations before income taxes		44,485		79,139
Income tax expense		15,533		23,263
Net income from continuing operations		28,952		55,876
Loss from discontinued operations before income tax benefit		(8,436)		(10,334)
Income tax benefit from discontinued operations		(3,206)		(3,927)
Net loss from discontinued operations		(5,230)		(6,407)
Net income (loss)		23,722		49,469
Preferred stock dividends		3,615		7,229
Net income (loss) available to common shareholders		20,107		42,240
Restatement Adjustment | BankMobile | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest income		0		0
Interest expense		10		16
Net interest income		(10)		(16)
Provision for loan losses		0		0
Non-interest income		11,420		28,746
Non-interest expense		19,846		39,064
Income from continuing operations before income taxes		(8,436)		(10,334)
Income tax expense		(3,206)		(3,927)
Net income from continuing operations		(5,230)		(6,407)
Loss from discontinued operations before income tax benefit		8,436		10,334
Income tax benefit from discontinued operations		3,206		3,927
Net loss from discontinued operations		5,230		6,407
Net income (loss)		0		0
Preferred stock dividends		0		0
Net income (loss) available to common shareholders		$ 0		$ 0

Significant Accounting Polici36

Significant Accounting Policies and Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Jun. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 299,990	$ 258,076
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption			0
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption			$ 0
Net unrealized gain	$ 1,041
Accumulated Other Comprehensive Loss | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	(298)
Accumulated Other Comprehensive Loss | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	(1,041)
Retained Earnings | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	298
Retained Earnings | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ 1,041

Earnings Per Share - Components

Earnings Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) available to common shareholders	$ 20,048	$ 20,107	$ 40,575	$ 42,240
Weighted-average number of common shares outstanding - basic (shares)	31,564,893	30,641,554	31,495,082	30,524,955
Share-based compensation plans (shares)	807,258	1,910,634	823,245	2,129,773
Warrants (shares)	8,511	17,464	8,566	27,318
Weighted-average number of common shares - diluted (shares)	32,380,662	32,569,652	32,326,893	32,682,046
Basic earnings per common share (usd per share)	$ 0.64	$ 0.66	$ 1.29	$ 1.38
Diluted earnings per common share (usd per share)	$ 0.62	$ 0.62	$ 1.26	$ 1.29

Earnings Per Share - Anti-dilut

Earnings Per Share - Anti-dilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Anti-dilutive securities:
Total anti-dilutive securities (shares)	1,069,225	340,567	1,069,225	334,967
Share-based compensation awards
Anti-dilutive securities:
Total anti-dilutive securities (shares)	1,069,225	288,325	1,069,225	282,725
Warrants
Anti-dilutive securities:
Total anti-dilutive securities (shares)	0	52,242	0	52,242

Changes in Accumulated Other 39

Changes in Accumulated Other Comprehensive Income (Loss) By Component (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ 920,964	$ 855,872
Ending balance	$ 936,227	$ 910,289	936,227	910,289
Accumulated other comprehensive loss, net	33,997		33,997			$ 359
Retained earnings	299,990		299,990			258,076
Unrealized Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(26,691)		(249)
Balance after reclassification adjustments on January 1, 2018						(1,458)
Other comprehensive income (loss) before reclassifications	(9,020)		(34,253)
Amounts reclassified from accumulated other comprehensive income (loss) to net income	0		0
Net current-period other comprehensive income (loss)	(9,020)		(34,253)
Ending balance	(35,711)		(35,711)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0		88
Balance after reclassification adjustments on January 1, 2018						0
Other comprehensive income (loss) before reclassifications	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
Total Unrealized Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(26,691)	(3,366)	(161)	(2,681)
Balance after reclassification adjustments on January 1, 2018						(1,458)
Other comprehensive income (loss) before reclassifications	(9,020)	12,130	(34,253)	11,445
Amounts reclassified from accumulated other comprehensive income (loss) to net income	0	(1,942)	0	(1,942)
Net current-period other comprehensive income (loss)	(9,020)	10,188	(34,253)	9,503
Ending balance	(35,711)	6,822	(35,711)	6,822
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	503	(1,506)	(198)	(2,211)
Balance after reclassification adjustments on January 1, 2018						(240)
Other comprehensive income (loss) before reclassifications	1,403	(420)	2,049	(219)
Amounts reclassified from accumulated other comprehensive income (loss) to net income	(192)	468	(95)	972
Net current-period other comprehensive income (loss)	1,211	48	1,954	753
Ending balance	1,714	(1,458)	1,714	(1,458)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(26,188)	(4,872)	(359)	(4,892)
Balance after reclassification adjustments on January 1, 2018						(1,698)
Other comprehensive income (loss) before reclassifications	(7,617)	11,710	(32,204)	11,226
Amounts reclassified from accumulated other comprehensive income (loss) to net income	(192)	(1,474)	(95)	(970)
Net current-period other comprehensive income (loss)	(7,809)	10,236	(32,299)	10,256
Ending balance	(33,997)	5,364	(33,997)	5,364
Retained Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			258,076	193,698
Ending balance	$ 299,990	$ 235,938	$ 299,990	$ 235,938
ASU 2018-02 | Unrealized Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					$ (256)
ASU 2018-02 | Foreign Currency Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					0
ASU 2018-02 | Total Unrealized Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(256)
ASU 2018-02 | Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(42)
ASU 2018-02 | Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(298)
Accounting Standards Update 2016-01
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption						$ 0
Accounting Standards Update 2016-01 | Unrealized Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(953)
Accounting Standards Update 2016-01 | Foreign Currency Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(88)
Accounting Standards Update 2016-01 | Total Unrealized Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(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 of new accounting principle in period of adoption					0
Accounting Standards Update 2016-01 | Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(1,041)
Accounting Standards Update 2016-01 | Retained Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					1,041
Combined effect of multiple accounting pronouncements on components of shareholders' equity | Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					(1,300)
Combined effect of multiple accounting pronouncements on components of shareholders' equity | Retained Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption					$ 1,300

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,206,202	$ 472,300
Gross Unrealized Gains	798	2,639
Gross Unrealized Losses	(49,056)	(3,568)
Available-for-sale securities, debt securities	1,157,944
Investment securities, at fair value	1,161,000	471,371
Fair value	1,161,000	471,371
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	381,545	44,959
Gross Unrealized Gains	798	1,130
Gross Unrealized Losses	(21,335)	0
Available-for-sale securities, debt securities	361,008
Fair value		46,089
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	490,425	186,221
Gross Unrealized Gains	0	36
Gross Unrealized Losses	(13,862)	(2,799)
Available-for-sale securities, debt securities	476,563
Fair value		183,458
Agency-guaranteed commercial real estate mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	334,232	238,809
Gross Unrealized Gains	0	432
Gross Unrealized Losses	(13,859)	(769)
Available-for-sale securities, debt securities	320,373
Fair value		238,472
Equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,311
Gross Unrealized Gains		1,041
Gross Unrealized Losses		0
Investment securities, at fair value	$ 3,056
Fair value		$ 3,352

Investment Securities - Stateme

Investment Securities - Statement of Proceeds from Sale of Available for Sale Investment Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale of available-for-sale securities	$ 0	$ 115,982	$ 0	$ 115,982
Gross gains	0	3,183	0	3,183
Gross losses	0	0	0	0
Net gains (losses)	$ 0	$ 3,183	$ 0	$ 3,183

Investment Securities - Summa42

Investment Securities - Summary of Available-for-Sale Debt Securities by Stated Maturity (Detail) $ in Thousands	Jun. 30, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Due in one year or less, amortized cost	$ 0
Due after one year through five years, amortized cost	0
Due after five years through ten years, amortized cost	179,413
Due after ten years, amortized cost	202,132
Total debt securities, amortized cost	1,206,202
Due in one year or less, fair value	0
Due after one year through five years, fair value	0
Due after five years through ten years, fair value	171,214
Due after ten years, fair value	189,794
Total debt securities, fair value	1,157,944
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Agency-guaranteed mortgage backed securities, amortized cost	490,425
Agency-guaranteed mortgage-backed securities, fair value	476,563
Total debt securities, fair value	476,563
Agency-guaranteed commercial real estate mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Agency-guaranteed mortgage backed securities, amortized cost	334,232
Agency-guaranteed mortgage-backed securities, fair value	320,373
Total debt securities, fair value	$ 320,373

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	$ 1,045,776	$ 220,831
Less Than 12 Months, Unrealized Losses	(45,123)	(1,396)
12 Months or More, Fair Value	66,409	72,730
12 Months or More, Unrealized Losses	(3,933)	(2,172)
Fair Value, Total	1,112,185	293,561
Unrealized Losses	(49,056)	(3,568)
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	315,249
Less Than 12 Months, Unrealized Losses	(21,335)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Fair Value, Total	315,249
Unrealized Losses	(21,335)
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	416,002	104,861
Less Than 12 Months, Unrealized Losses	(10,256)	(656)
12 Months or More, Fair Value	60,561	66,579
12 Months or More, Unrealized Losses	(3,606)	(2,143)
Fair Value, Total	476,563	171,440
Unrealized Losses	(13,862)	(2,799)
Agency-guaranteed commercial real estate mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	314,525	115,970
Less Than 12 Months, Unrealized Losses	(13,532)	(740)
12 Months or More, Fair Value	5,848	6,151
12 Months or More, Unrealized Losses	(327)	(29)
Fair Value, Total	320,373	122,121
Unrealized Losses	$ (13,859)	$ (769)

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)Security	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)Security	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Jan. 01, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of available-for-sale investment securities in the less than twelve month category (security) | Security	64		64
Number of available-for-sale investment securities in the twelve month or more category (security) | Security	16		16
Impairment loss on investment securities	$ 0	$ (2,882)	$ 0	$ (4,585)
Investment securities, at fair value	1,161,000		1,161,000		$ 471,371
Unrealized gains (losses) on equity securities	(9,020)	10,188	(34,253)	9,503
Gain (Loss) on Investments			(296)	0
Pledged investment securities fair value	685,000		685,000		16,900
Equity securities
Debt Securities, Available-for-sale [Line Items]
Impairment loss on investment securities		$ (2,900)		$ (4,600)
Investment securities, at fair value					3,352
Unrealized gains (losses) on equity securities					1,000
Accounting Standards Update 2016-01
Debt Securities, Available-for-sale [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 0
Accumulated Other Comprehensive Loss | Accounting Standards Update 2016-01
Debt Securities, Available-for-sale [Line Items]
Cumulative effect of new accounting principle in period of adoption						$ 1,000
Other Non-interest Income | Equity securities
Debt Securities, Available-for-sale [Line Items]
Gain (Loss) on Investments	$ 300		$ (300)

Loans Held for Sale - Compositi

Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Receivables Held-for-sale [Abstract]
Mortgage warehouse loans, at fair value			$ 1,930,738		$ 1,793,408
Multi-family loans at lower of cost or fair value			0		144,191
Total commercial loans held for sale			1,930,738		1,937,599
Residential mortgage loans, at fair value			1,043		1,886
Loans held for sale			$ 1,931,781		$ 1,939,485
Loans held for sale, average life from purchase to sale			20 days
Transfer of loans held for sale to held for investment	$ 129,700		$ 129,691	$ 0
Transfer of loans held for investment to loans held for sale		$ 150,600	$ 0	$ 150,758

Loans Receivable and Allowanc46

Loans Receivable and Allowance for Loan Losses - Schedule of Loans Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 7,181,084		$ 6,768,175
Deferred costs and unamortized premiums, net	642		83
Allowance for loan losses	(38,288)	$ (39,499)	(38,015)	$ (38,458)	$ (39,883)	$ (37,315)
Total loans receivable, net of allowance for loan losses	7,143,438		6,730,243
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	3,542,770		3,502,381
Allowance for loan losses	(12,069)	(12,545)	(12,168)	(12,028)	(12,283)	(11,602)
Total loans receivable, net of allowance for loan losses					94,900
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	88,141		85,393
Allowance for loan losses	(992)	(921)	(979)	(716)	(885)	(840)
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	493,222		234,090
Allowance for loan losses	(2,908)	(3,179)	(2,929)	(2,995)	(3,080)	(3,342)
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	85,328		90,227
Allowance for loan losses	(149)	(176)	(180)	(268)	(284)	(286)
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	3,874		3,547
Allowance for loan losses	(226)	$ (183)	(172)	$ (104)	$ (101)	$ (118)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	6,598,660		6,440,311
Commercial | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	3,542,770		3,502,381
Commercial | Commercial and industrial (including owner occupied commercial real estate)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	1,811,751		1,633,818
Commercial | Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	1,155,998		1,218,719
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	88,141		85,393
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	582,424		327,864
Consumer | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	493,222		234,090
Consumer | Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	85,328		90,227
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 3,874		$ 3,547

Loans Receivable and Allowanc47

Loans Receivable and Allowance for Loan Losses - Non-Covered Loans and Covered Loans by Class and Performance Status (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 8,955	$ 19,813
Non-Accrual	25,995	26,415
Current	7,121,560	6,695,032
Loans receivable, gross	$ 7,181,084	6,768,175
Delinquent period	30 days
Due days for loan payments	90 days
Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 24,574	26,915
30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	6,294	17,070
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,661	2,743
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	4,900
Non-Accrual	1,343	0
Current	3,539,640	3,495,600
Loans receivable, gross	3,542,770	3,502,381
Multi-family | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	1,787	1,881
Multi-family | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	4,900
Multi-family | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,087	103
Non-Accrual	13,683	17,392
Current	1,251,148	1,130,831
Loans receivable, gross	1,266,520	1,149,090
Commercial and industrial | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	602	764
Commercial and industrial | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,087	103
Commercial and industrial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Commercial real estate - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	202
Non-Accrual	718	1,453
Current	534,923	472,501
Loans receivable, gross	545,231	484,728
Commercial real estate - owner occupied | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	9,590	10,572
Commercial real estate - owner occupied | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	202
Commercial real estate - owner occupied | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Commercial real estate - non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	93
Non-Accrual	2,536	160
Current	1,148,581	1,213,216
Loans receivable, gross	1,155,998	1,218,719
Commercial real estate - non-owner occupied | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	4,881	5,250
Commercial real estate - non-owner occupied | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	93
Commercial real estate - non-owner occupied | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Non-Accrual	0	0
Current	88,141	85,393
Loans receivable, gross	88,141	85,393
Construction | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	0	0
Construction | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,174	7,628
Non-Accrual	5,606	5,420
Current	480,381	215,361
Loans receivable, gross	493,222	234,090
Residential real estate | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	5,061	5,681
Residential real estate | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,174	7,628
Residential real estate | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	5,638	6,771
Non-Accrual	2,015	1,959
Current	75,250	78,946
Loans receivable, gross	85,328	90,227
Manufactured housing | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	2,425	2,551
Manufactured housing | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,977	4,028
Manufactured housing | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,661	2,743
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	56	116
Non-Accrual	94	31
Current	3,496	3,184
Loans receivable, gross	3,874	3,547
Other | Purchased Credit Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	228	216
Other | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	56	116
Other | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 0	$ 0

Loans Receivable and Allowanc48

Loans Receivable and Allowance for Loan Losses - Additional Information (Detail)	Jun. 30, 2018USD ($)LoanCommitment	Dec. 31, 2017USD ($)Loan	Jun. 30, 2017USD ($)Loan	Jun. 30, 2018USD ($)AllowanceCommitment	Mar. 31, 2018USD ($)	Jun. 30, 2017USD ($)Allowance	Mar. 31, 2017USD ($)	Jun. 30, 2018USD ($)AllowanceCommitment	Jun. 30, 2017USD ($)Allowance
Financing Receivable, Modifications [Line Items]
Funds for reimbursement	$ 500,000	$ 600,000		$ 500,000				$ 500,000
Loans reported as TDR	$ 19,400,000	20,400,000		$ 19,400,000				$ 19,400,000
Minimum performance requirement								6 months
Sustained performance period								9 months
Number of commitments to lend additional funds (commitment) | Commitment	0			0				0
Loans modified as TDR allowance (allowance) | Allowance				0		0			0
Residential mortgage loans acquired									$ 0
Loans receivable, net of allowance for loan losses	$ 7,143,438,000	6,730,243,000		$ 7,143,438,000				$ 7,143,438,000
Proceeds from sales of loans								29,038,000	112,927,000
Gain on sale of SBA and other loans				$ 947,000		$ 573,000		2,308,000	1,901,000
Term of fixed rate residential mortgage loans				30 years		30 years	30 years
Purchase price as a percentage of loans outstanding				100.40%		101.00%	98.50%
Residential real estate
Financing Receivable, Modifications [Line Items]
Residential real estate held in other real estate owned	300,000			$ 300,000				300,000
Loans in process of foreclosure	2,200,000	$ 1,600,000		2,200,000				2,200,000
Loans receivable, net of allowance for loan losses	$ 277,400,000			277,400,000				$ 277,400,000
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDR (loan) | Loan	1	1
Loans modified as TDR	$ 1,600,000	$ 2,100,000
Manufactured housing
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDR (loan) | Loan	0		6
Loans modified as TDR									300,000
Loans modified as TDR allowance (allowance) | Allowance								1
Allowance for credit losses, effect of change in method								$ 1,000
Small Business Administration Loan
Financing Receivable, Modifications [Line Items]
Loans receivable, net of allowance for loan losses	$ 11,700,000		$ 7,000,000	11,700,000	$ 15,000,000	$ 7,000,000	$ 8,700,000	11,700,000	7,000,000
Gain on sale of SBA and other loans				900,000	$ 1,400,000	600,000	800,000
Residential Mortgage Loan Commitments
Financing Receivable, Modifications [Line Items]
Loans receivable, net of allowance for loan losses			$ 90,000,000			$ 90,000,000	174,200,000		$ 90,000,000
Multi-family
Financing Receivable, Modifications [Line Items]
Loans receivable, net of allowance for loan losses							94,900,000
Proceeds from sales of loans							95,400,000
Gain on sale of SBA and other loans							$ 500,000
Federal Home Loan Bank of Pittsburgh
Financing Receivable, Modifications [Line Items]
Loans pledged as collateral	$ 5,600,000,000	$ 5,500,000,000		$ 5,600,000,000				$ 5,600,000,000

Loans Receivable and Allowanc49

Loans Receivable and Allowance for Loan Losses - Schedule of Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 39,499	$ 39,883	$ 38,015	$ 37,315
Charge-offs	(1,161)	(2,148)	(1,850)	(2,991)
Recoveries	734	188	790	549
Provision for loan losses	(784)	535	1,333	3,585
Ending balance	38,288	38,458	38,288	38,458
Loans:
Individually evaluated for impairment					$ 37,629	$ 38,435
Collectively evaluated for impairment					7,118,881	6,702,825
Loans receivable, gross					7,181,084	6,768,175
Allowance for loan losses:
Individually evaluated for impairment					1,381	1,451
Collectively evaluated for impairment					33,472	32,537
Total Allowance for loan losses	39,499	39,883	38,015	37,315	38,288	38,015
Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					24,574	26,915
Loans receivable, gross					24,574	26,915
Allowance for loan losses:
Loans acquired with credit deterioration					3,435	4,027
Multi-family
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	12,545	12,283	12,168	11,602
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan losses	(476)	(255)	(99)	426
Ending balance	12,069	12,028	12,069	12,028
Loans:
Individually evaluated for impairment					1,343	0
Collectively evaluated for impairment					3,539,640	3,500,500
Loans receivable, gross					3,542,770	3,502,381
Allowance for loan losses:
Individually evaluated for impairment					0	0
Collectively evaluated for impairment					12,069	12,168
Total Allowance for loan losses	12,545	12,283	12,168	11,602	12,069	12,168
Multi-family | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					1,787	1,881
Loans receivable, gross					1,787	1,881
Allowance for loan losses:
Loans acquired with credit deterioration					0	0
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,737	13,009	10,918	11,050
Charge-offs	(174)	(1,849)	(224)	(2,047)
Recoveries	140	68	175	283
Provision for loan losses	555	357	1,389	2,299
Ending balance	12,258	11,585	12,258	11,585
Loans:
Individually evaluated for impairment					13,750	17,461
Collectively evaluated for impairment					1,252,168	1,130,865
Loans receivable, gross					1,266,520	1,149,090
Allowance for loan losses:
Individually evaluated for impairment					1,062	650
Collectively evaluated for impairment					10,749	9,804
Total Allowance for loan losses	11,737	13,009	10,918	11,050	12,258	10,918
Commercial and industrial | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					602	764
Loans receivable, gross					602	764
Allowance for loan losses:
Loans acquired with credit deterioration					447	464
Commercial real estate - owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,525	2,394	3,232	2,183
Charge-offs	(483)	0	(501)	0
Recoveries	326	9	326	9
Provision for loan losses	(380)	573	(69)	784
Ending balance	2,988	2,976	2,988	2,976
Loans:
Individually evaluated for impairment					759	1,448
Collectively evaluated for impairment					534,882	472,708
Loans receivable, gross					545,231	484,728
Allowance for loan losses:
Individually evaluated for impairment					1	642
Collectively evaluated for impairment					2,987	2,580
Total Allowance for loan losses	3,525	2,394	3,232	2,183	2,988	3,232
Commercial real estate - owner occupied | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					9,590	10,572
Loans receivable, gross					9,590	10,572
Allowance for loan losses:
Loans acquired with credit deterioration					0	10
Commercial real estate - non-owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	7,233	7,847	7,437	7,894
Charge-offs	0	(4)	0	(408)
Recoveries	0	0	0	0
Provision for loan losses	(535)	(57)	(739)	300
Ending balance	6,698	7,786	6,698	7,786
Loans:
Individually evaluated for impairment					2,536	160
Collectively evaluated for impairment					1,148,581	1,213,309
Loans receivable, gross					1,155,998	1,218,719
Allowance for loan losses:
Individually evaluated for impairment					0	0
Collectively evaluated for impairment					4,334	4,630
Total Allowance for loan losses	7,233	7,847	7,437	7,894	6,698	7,437
Commercial real estate - non-owner occupied | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					4,881	5,250
Loans receivable, gross					4,881	5,250
Allowance for loan losses:
Loans acquired with credit deterioration					2,364	2,807
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	921	885	979	840
Charge-offs	0	0	0	0
Recoveries	209	49	220	130
Provision for loan losses	(138)	(218)	(207)	(254)
Ending balance	992	716	992	716
Loans:
Individually evaluated for impairment					0	0
Collectively evaluated for impairment					88,141	85,393
Loans receivable, gross					88,141	85,393
Allowance for loan losses:
Individually evaluated for impairment					0	0
Collectively evaluated for impairment					992	979
Total Allowance for loan losses	921	885	979	840	992	979
Construction | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					0	0
Loans receivable, gross					0	0
Allowance for loan losses:
Loans acquired with credit deterioration					0	0
Residential real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,179	3,080	2,929	3,342
Charge-offs	(42)	(69)	(407)	(290)
Recoveries	56	6	63	27
Provision for loan losses	(285)	(22)	323	(84)
Ending balance	2,908	2,995	2,908	2,995
Loans:
Individually evaluated for impairment					8,775	9,247
Collectively evaluated for impairment					479,386	219,162
Loans receivable, gross					493,222	234,090
Allowance for loan losses:
Individually evaluated for impairment					313	155
Collectively evaluated for impairment					2,106	2,177
Total Allowance for loan losses	3,179	3,080	2,929	3,342	2,908	2,929
Residential real estate | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					5,061	5,681
Loans receivable, gross					5,061	5,681
Allowance for loan losses:
Loans acquired with credit deterioration					489	597
Manufactured housing
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	176	284	180	286
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan losses	(27)	(16)	(31)	(18)
Ending balance	149	268	149	268
Loans:
Individually evaluated for impairment					10,372	10,089
Collectively evaluated for impairment					72,531	77,587
Loans receivable, gross					85,328	90,227
Allowance for loan losses:
Individually evaluated for impairment					5	4
Collectively evaluated for impairment					81	82
Total Allowance for loan losses	176	284	180	286	149	180
Manufactured housing | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					2,425	2,551
Loans receivable, gross					2,425	2,551
Allowance for loan losses:
Loans acquired with credit deterioration					63	94
Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	183	101	172	118
Charge-offs	(462)	(226)	(718)	(246)
Recoveries	3	56	6	100
Provision for loan losses	502	173	766	132
Ending balance	226	104	226	104
Loans:
Individually evaluated for impairment					94	30
Collectively evaluated for impairment					3,552	3,301
Loans receivable, gross					3,874	3,547
Allowance for loan losses:
Individually evaluated for impairment					0	0
Collectively evaluated for impairment					154	117
Total Allowance for loan losses	$ 183	$ 101	$ 172	$ 118	226	172
Other | Purchased Credit Impaired Loans
Loans:
Loans acquired with credit deterioration					228	216
Loans receivable, gross					228	216
Allowance for loan losses:
Loans acquired with credit deterioration					$ 72	$ 55

Loans Receivable and Allowanc50

Loans Receivable and Allowance for Loan Losses - Summary of Recorded Investment Net Charge-Offs, Unpaid Principal Balance and Related Allowance for Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, Total	$ 37,629		$ 37,629		$ 38,435
Unpaid Principal Balance
Unpaid Principal Balance, Total	38,905		38,905		39,089
Related Allowance	1,381		1,381		1,451
Average Recorded Investment
Average Recorded Investment, Total	36,045	$ 35,422	36,841	$ 33,419
Interest Income Recognized
Interest Income Recognized, Total	222	249	380	511
Multi-family
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, With no related allowance recorded	1,343		1,343
Unpaid Principal Balance
Unpaid Principal Balance, With no related allowance recorded	1,343		1,343
Average Recorded Investment
Average Recorded Investment, With no related allowance recorded	672		448
Interest Income Recognized
Interest Income Recognized, With no related allowance recorded	8		8
Commercial and industrial
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, With no related allowance recorded	5,642		5,642		9,138
Recorded Investment Net of Charge Offs, With an allowance recorded	8,108		8,108		8,323
Unpaid Principal Balance
Unpaid Principal Balance, With no related allowance recorded	5,889		5,889		9,287
Unpaid Principal Balance, With an allowance recorded	8,292		8,292		8,506
Related Allowance	1,062		1,062		650
Average Recorded Investment
Average Recorded Investment, With no related allowance recorded	5,736	6,678	6,870	5,251
Average Recorded Investment, With an allowance recorded	8,283	7,209	8,296	6,846
Interest Income Recognized
Interest Income Recognized, With no related allowance recorded	2	46	2	96
Interest Income Recognized, With an allowance recorded	11	0	12	22
Commercial real estate - owner occupied
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, With no related allowance recorded	718		718		806
Recorded Investment Net of Charge Offs, With an allowance recorded	41		41		642
Unpaid Principal Balance
Unpaid Principal Balance, With no related allowance recorded	1,201		1,201		806
Unpaid Principal Balance, With an allowance recorded	41		41		642
Related Allowance	1		1		642
Average Recorded Investment
Average Recorded Investment, With no related allowance recorded	664	1,739	713	1,563
Average Recorded Investment, With an allowance recorded	455	839	517	839
Interest Income Recognized
Interest Income Recognized, With no related allowance recorded	0	0	0	3
Interest Income Recognized, With an allowance recorded	1	1	2	2
Commercial real estate - non-owner occupied
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, With no related allowance recorded	2,536		2,536		160
Recorded Investment Net of Charge Offs, With an allowance recorded					0
Unpaid Principal Balance
Unpaid Principal Balance, With no related allowance recorded	2,648		2,648		272
Unpaid Principal Balance, With an allowance recorded					0
Related Allowance					0
Average Recorded Investment
Average Recorded Investment, With no related allowance recorded	1,390	884	980	1,257
Average Recorded Investment, With an allowance recorded		114		126
Interest Income Recognized
Interest Income Recognized, With no related allowance recorded	8	0	8	2
Interest Income Recognized, With an allowance recorded		0		0
Other
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, With no related allowance recorded	94		94		30
Unpaid Principal Balance
Unpaid Principal Balance, With no related allowance recorded	94		94		30
Average Recorded Investment
Average Recorded Investment, With no related allowance recorded	96	56	74	56
Interest Income Recognized
Interest Income Recognized, With no related allowance recorded	0	0	0	0
Residential real estate
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, With no related allowance recorded	4,301		4,301		3,628
Recorded Investment Net of Charge Offs, With an allowance recorded	4,474		4,474		5,619
Unpaid Principal Balance
Unpaid Principal Balance, With no related allowance recorded	4,546		4,546		3,801
Unpaid Principal Balance, With an allowance recorded	4,479		4,479		5,656
Related Allowance	313		313		155
Average Recorded Investment
Average Recorded Investment, With no related allowance recorded	3,959	2,660	3,849	4,001
Average Recorded Investment, With an allowance recorded	4,550	4,953	4,906	3,399
Interest Income Recognized
Interest Income Recognized, With no related allowance recorded	2	0	2	1
Interest Income Recognized, With an allowance recorded	38	45	63	84
Manufactured housing
Recorded Investment Net of Charge offs
Recorded Investment Net of Charge Offs, With no related allowance recorded	10,144		10,144		9,865
Recorded Investment Net of Charge Offs, With an allowance recorded	228		228		224
Unpaid Principal Balance
Unpaid Principal Balance, With no related allowance recorded	10,144		10,144		9,865
Unpaid Principal Balance, With an allowance recorded	228		228		224
Related Allowance	5		5		$ 4
Average Recorded Investment
Average Recorded Investment, With no related allowance recorded	10,015	10,074	9,963	9,937
Average Recorded Investment, With an allowance recorded	225	216	225	144
Interest Income Recognized
Interest Income Recognized, With no related allowance recorded	146	152	277	293
Interest Income Recognized, With an allowance recorded	$ 6	$ 5	$ 6	$ 8

Loans Receivable and Allowanc51

Loans Receivable and Allowance for Loan Losses - Schedule of Accruing and Nonaccrual TDRs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 663	$ 6,175	$ 985	$ 7,378
Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	5,855	0	6,203
Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment	450	320	772	1,175
Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	200	0	200	0
Other
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 13	$ 0	13	$ 0
Accruing
Financing Receivable, Impaired [Line Items]
Recorded Investment			11,634		$ 12,021
Accruing | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment			67		63
Accruing | Commercial real estate - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment			41		0
Accruing | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment			8,357		8,130
Accruing | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment			3,169		3,828
Accruing | Other
Financing Receivable, Impaired [Line Items]
Recorded Investment			0		0
Nonaccruing
Financing Receivable, Impaired [Line Items]
Recorded Investment			7,788		8,408
Nonaccruing | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment			5,415		5,939
Nonaccruing | Commercial real estate - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment			0		0
Nonaccruing | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment			1,875		1,766
Nonaccruing | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment			485		703
Nonaccruing | Other
Financing Receivable, Impaired [Line Items]
Recorded Investment			13		0
Total
Financing Receivable, Impaired [Line Items]
Recorded Investment			19,422		20,429
Total | Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Impaired [Line Items]
Recorded Investment			5,482		6,002
Total | Commercial real estate - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment			41		0
Total | Manufactured housing
Financing Receivable, Impaired [Line Items]
Recorded Investment			10,232		9,896
Total | Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment			3,654		4,531
Total | Other
Financing Receivable, Impaired [Line Items]
Recorded Investment			$ 13		$ 0

Loans Receivable and Allowanc52

Loans Receivable and Allowance for Loan Losses - Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)Loan	Jun. 30, 2017USD ($)Loan	Jun. 30, 2018USD ($)Loan	Jun. 30, 2017USD ($)Loan
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	16	11	25	32
Recorded Investment | $	$ 663	$ 6,175	$ 985	$ 7,378
Extensions of maturity
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	1	2	1	3
Recorded Investment | $	$ 56	$ 5,855	$ 56	$ 6,203
Interest-rate reductions
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	15	9	24	29
Recorded Investment | $	$ 607	$ 320	$ 929	$ 1,175

Loans Receivable and Allowanc53

Loans Receivable and Allowance for Loan Losses - Summary of Loans Modified in Troubled Debt Restructurings and Related Recorded Investment (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)Loan	Jun. 30, 2017USD ($)Loan	Jun. 30, 2018USD ($)Loan	Jun. 30, 2017USD ($)Loan
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	16	11	25	32
Recorded Investment | $	$ 663	$ 6,175	$ 985	$ 7,378
Commercial and industrial (including owner occupied commercial real estate)
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	0	2	0	3
Recorded Investment | $	$ 0	$ 5,855	$ 0	$ 6,203
Manufactured housing
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	14	9	23	29
Recorded Investment | $	$ 450	$ 320	$ 772	$ 1,175
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	1	0	1	0
Recorded Investment | $	$ 200	$ 0	$ 200	$ 0
Other
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	1	0	1	0
Recorded Investment | $	$ 13	$ 0	$ 13	$ 0

Loans Receivable and Allowanc54

Loans Receivable and Allowance for Loan Losses - Changes in Accretable Yield Related to Purchased-credit-impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Changes in Accretable Yield
Accretable yield balance, beginning of period	$ 7,663	$ 9,376	$ 7,825	$ 10,202
Accretion to interest income	(516)	(465)	(854)	(958)
Reclassification from nonaccretable difference and disposals, net	256	95	432	(238)
Accretable yield balance, end of period	$ 7,403	$ 9,006	$ 7,403	$ 9,006

Loans Receivable and Allowanc55

Loans Receivable and Allowance for Loan Losses - Credit Ratings of Covered and Non-Covered Loan Portfolio (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 7,181,084	$ 6,768,175
Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	6,405,308	6,300,595
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	117,075	99,279
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	76,277	40,437
Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	566,841	305,939
Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	15,583	21,925
Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,542,770	3,502,381
Multi-family | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,485,669	3,438,554
Multi-family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	31,001	53,873
Multi-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	26,100	9,954
Multi-family | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Multi-family | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,266,520	1,149,090
Commercial and industrial | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,211,934	1,118,889
Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	16,979	7,652
Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	37,607	22,549
Commercial and industrial | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Commercial and industrial | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Commercial real estate - owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	545,231	484,728
Commercial real estate - owner occupied | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	529,898	471,826
Commercial real estate - owner occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	8,152	5,987
Commercial real estate - owner occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	7,181	6,915
Commercial real estate - owner occupied | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Commercial real estate - owner occupied | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Commercial real estate - non-owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,155,998	1,218,719
Commercial real estate - non-owner occupied | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,089,666	1,185,933
Commercial real estate - non-owner occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	60,943	31,767
Commercial real estate - non-owner occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	5,389	1,019
Commercial real estate - non-owner occupied | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Commercial real estate - non-owner occupied | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	88,141	85,393
Construction | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	88,141	85,393
Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Construction | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Construction | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	493,222	234,090
Residential real estate | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Residential real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Residential real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Residential real estate | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	485,442	221,042
Residential real estate | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	7,780	13,048
Manufactured housing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	85,328	90,227
Manufactured housing | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Manufactured housing | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Manufactured housing | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Manufactured housing | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	77,675	81,497
Manufactured housing | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	7,653	8,730
Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,874	3,547
Other | Pass/Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Other | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,724	3,400
Other | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 150	$ 147

Regulatory Capital - Summary of

Regulatory Capital - Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Jan. 01, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital (to risk weighted assets), Actual Amount	$ 735,609		$ 689,494
Tier 1 capital (to risk weighted assets), Actual Amount	953,025		906,963
Total capital (to risk weighted assets), Actual Amount	1,072,072		1,021,601
Tier 1 capital (to average assets), Actual Amount	$ 953,025		$ 906,963
Common equity Tier 1 (to risk weighted assets), Actual Ratio	8.611%		8.805%
Tier 1 capital (to risk weighted assets), Actual Ratio	11.156%		11.583%
Total capital (to risk weighted assets), Actual Ratio	12.55%		13.047%
Tier 1 capital (to average assets), Actual Ratio	8.866%		8.937%
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 384,418		$ 352,368
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	512,557		469,824
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	683,409		626,432
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 429,963		$ 405,949
Common equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.50%	6.375%	4.50%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	6.00%	7.875%	6.00%
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	8.00%	9.875%	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	$ 544,591		$ 450,248
Tier 1 (to risk weighted assets) Required for Basel III amount	672,731		567,704
Total capital (to risk weighted assets), for Basel III amount	843,583		724,313
Tier 1 (to risk average assets), for Basel III amount	$ 429,963		$ 405,949
Common equity Tier 1 (to risk weighted assets), for Basel III ratio	6.375%		5.75%
Tier 1 capital (to risk weighted assets), for Basel III ratio	7.875%		7.25%
Total capital (to risk weighted assets), for Basel III ratio	9.875%		9.25%
Tier 1 capital (to average assets), for Basel III ratio	4.00%		4.00%
Customers Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital (to risk weighted assets), Actual Amount	$ 1,054,613		$ 1,023,564
Tier 1 capital (to risk weighted assets), Actual Amount	1,054,613		1,023,564
Total capital (to risk weighted assets), Actual Amount	1,202,070		1,170,666
Tier 1 capital (to average assets), Actual Amount	$ 1,054,613		$ 1,023,564
Common equity Tier 1 (to risk weighted assets), Actual Ratio	12.351%		13.081%
Tier 1 capital (to risk weighted assets), Actual Ratio	12.351%		13.081%
Total capital (to risk weighted assets), Actual Ratio	14.078%		14.961%
Tier 1 capital (to average assets), Actual Ratio	9.822%		10.092%
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 384,232		$ 352,122
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	512,309		469,496
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	683,079		625,994
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 429,471		$ 405,701
Common equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.50%		4.50%	6.375%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	6.00%		6.00%	7.875%
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	8.00%		8.00%	9.875%
Tier 1 capital (to average assets), For Capital Adequacy Purposes Ratio	4.00%		4.00%
Common equity Tier 1 Capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 555,002		$ 508,621
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	683,079		625,994
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	853,849		782,493
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 536,839		$ 507,126
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	$ 544,329		$ 449,934
Tier 1 (to risk weighted assets) Required for Basel III amount	672,406		567,307
Total capital (to risk weighted assets), for Basel III amount	843,176		723,806
Tier 1 (to risk average assets), for Basel III amount	$ 429,471		$ 405,701
Common equity Tier 1 (to risk weighted assets), for Basel III ratio	6.375%		5.75%
Tier 1 capital (to risk weighted assets), for Basel III ratio	7.875%		7.25%
Total capital (to risk weighted assets), for Basel III ratio	9.875%		9.25%
Tier 1 capital (to average assets), for Basel III ratio	4.00%		4.00%

Regulatory Capital - Narrative

Regulatory Capital - Narrative (Details)	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Jan. 01, 2017	Jan. 01, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer to risk weighted assets, year one	0.625%
Capital conservation buffer to risk weighted assets, year two	1.25%
Capital conservation buffer to risk weighted assets, year three	1.875%
Capital conservation buffer to risk weighted assets, year four and thereafter	2.50%
Capital conservation buffer, excess of minimum capital ratio					2.50%
Common equity Tier 1 (to risk weighted assets), for capital adequacy purposes ratio	4.50%	6.375%	4.50%
Tier 1 capital (to risk weighted assets), for capital adequacy purposes ratio	6.00%	7.875%	6.00%
Total capital (to risk weighted assets), for capital adequacy purposes ratio	8.00%	9.875%	8.00%
Customers Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 (to risk weighted assets), for capital adequacy purposes ratio	4.50%		4.50%	6.375%
Tier 1 capital (to risk weighted assets), for capital adequacy purposes ratio	6.00%		6.00%	7.875%
Total capital (to risk weighted assets), for capital adequacy purposes ratio	8.00%		8.00%	9.875%

Disclosures About Fair Value 58

Disclosures About Fair Value of Financial Instruments - Narrative (Detail)	6 Months Ended
	Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, average life from purchase to sale	20 days

Disclosures About Fair Value 59

Disclosures About Fair Value of Financial Instruments - Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	$ 251,726	$ 146,323	$ 413,242	$ 264,709
Cash and cash equivalents, Estimated Fair Value	251,726	146,323
Debt securities, available for sale	1,157,944
Debt securities, available for sale, Estimated Fair Value	1,157,944
Investment securities, at fair value	1,161,000	471,371
Investments securities, available for sale, fair value		471,371
Equity securities, carrying amount	3,056
Equity securities, Estimated Fair Value	3,056
Loans held for sale, Carrying Amount	1,931,781	1,939,485
Loans held for sale, Estimated Fair Value	1,931,781	1,939,659
Loans receivable, net of allowance for loan losses, Carrying Amount	7,143,438	6,730,243
Loans receivable, net of allowance for loan losses, Estimated Fair Value	7,127,315	6,676,763
FHLB, Federal Reserve Bank and other restricted stock, Carrying Amount	136,066	105,918
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	136,066	105,918
Derivative assets	16,247	9,752
Deposits, Carrying Amount	7,295,954	6,800,142
Deposits, Estimated Fair Value	7,288,828	6,796,095
Federal funds purchased, Carrying Amount	105,000	155,000
Federal funds purchased, Estimated Fair Value	105,000	155,000
FHLB advances, Carrying Amount	2,389,797	1,611,860
FHLB advances, Estimated Fair Value	2,389,785	1,611,603
Other borrowings, Carrying Amount	186,888	186,497
Other borrowings, Estimated Fair Value	185,364	193,557
Subordinated debt, Carrying Amount	108,929	108,880
Subordinated debt, Estimated Fair Value	114,675	115,775
Derivative liabilities	13,698	10,074
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Estimated Fair Value	251,726	146,323
Debt securities, available for sale, Estimated Fair Value	0
Investments securities, available for sale, fair value		3,352
Equity securities, Estimated Fair Value	3,056
Loans held for sale, Estimated Fair Value	0	0
Loans receivable, net of allowance for loan losses, Estimated Fair Value	0	0
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	0	0
Derivative assets	0	0
Deposits, Estimated Fair Value	5,223,793	4,894,449
Federal funds purchased, Estimated Fair Value	105,000	155,000
FHLB advances, Estimated Fair Value	1,504,797	881,860
Other borrowings, Estimated Fair Value	63,554	65,072
Subordinated debt, Estimated Fair Value	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Estimated Fair Value	0	0
Debt securities, available for sale, Estimated Fair Value	1,157,944
Investments securities, available for sale, fair value		468,019
Equity securities, Estimated Fair Value	0
Loans held for sale, Estimated Fair Value	1,931,781	1,795,294
Loans receivable, net of allowance for loan losses, Estimated Fair Value	0	0
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	136,066	105,918
Derivative assets	16,114	9,692
Deposits, Estimated Fair Value	2,065,035	1,901,646
Federal funds purchased, Estimated Fair Value	0	0
FHLB advances, Estimated Fair Value	884,988	729,743
Other borrowings, Estimated Fair Value	121,810	128,485
Subordinated debt, Estimated Fair Value	114,675	115,775
Derivative liabilities	13,698	10,074
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Estimated Fair Value	0	0
Debt securities, available for sale, Estimated Fair Value	0
Investments securities, available for sale, fair value		0
Equity securities, Estimated Fair Value	0
Loans held for sale, Estimated Fair Value	0	144,365
Loans receivable, net of allowance for loan losses, Estimated Fair Value	7,127,315	6,676,763
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	0	0
Derivative assets	133	60
Deposits, Estimated Fair Value	0	0
Federal funds purchased, Estimated Fair Value	0	0
FHLB advances, Estimated Fair Value	0	0
Other borrowings, Estimated Fair Value	0	0
Subordinated debt, Estimated Fair Value	0	0
Derivative liabilities	$ 0	$ 0

Disclosures About Fair Value 60

Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Liabilities
Specific reserves related to impaired loans	$ 1,381	$ 1,451
Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	3,109,028	2,276,417
Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	12,956	15,351
Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	3,056
Derivative assets | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	16,247	9,752
Loans held for sale - fair value option | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	1,931,781	1,795,294
Derivative liabilities | Fair Value, Measurements, Recurring [Member]
Liabilities
Financial Liabilities Fair Value Disclosure	13,698	10,074
Impaired loans, net of specific reserves
Liabilities
Specific reserves related to impaired loans	1,381	1,451
Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	11,929	13,902
Other real estate owned | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	1,027	1,449
Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	476,563	183,458
Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	320,373	238,472
Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	361,008	46,089
Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure		3,352
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	3,056	3,352
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	3,056
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative assets | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale - fair value option | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative liabilities | Fair Value, Measurements, Recurring [Member]
Liabilities
Financial Liabilities Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other real estate owned | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure		3,352
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	3,105,839	2,273,005
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) | Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0
Significant Other Observable Inputs (Level 2) | Derivative assets | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	16,114	9,692
Significant Other Observable Inputs (Level 2) | Loans held for sale - fair value option | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	1,931,781	1,795,294
Significant Other Observable Inputs (Level 2) | Derivative liabilities | Fair Value, Measurements, Recurring [Member]
Liabilities
Financial Liabilities Fair Value Disclosure	13,698	10,074
Significant Other Observable Inputs (Level 2) | Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) | Other real estate owned | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	476,563	183,458
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	320,373	238,472
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	361,008	46,089
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure		0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	133	60
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	12,956	15,351
Significant Unobservable Inputs (Level 3) | Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0
Significant Unobservable Inputs (Level 3) | Derivative assets | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	133	60
Significant Unobservable Inputs (Level 3) | Loans held for sale - fair value option | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Derivative liabilities | Fair Value, Measurements, Recurring [Member]
Liabilities
Financial Liabilities Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	11,929	13,902
Significant Unobservable Inputs (Level 3) | Other real estate owned | Fair Value, Measurements, Nonrecurring [Member]
Assets
Assets, Fair Value Disclosure	1,027	1,449
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Agency-guaranteed commercial real estate mortgage-backed securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure	$ 0	0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring [Member]
Assets
Assets, Fair Value Disclosure		$ 0

Disclosures About Fair Value 61

Disclosures About Fair Value of Financial Instruments - Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Detail) - Significant Unobservable Inputs (Level 3) - Residential Mortgage Loan Commitments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning	$ 83	$ 95	$ 60	$ 45
Issuances	133	102	216	197
Settlements	(83)	(95)	(143)	(140)
Balance at ending	$ 133	$ 102	$ 133	$ 102

Disclosures About Fair Value 62

Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	$ 1,705	$ 1,726
Impaired loans, net of specific reserves | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	8.00%	8.00%
Other real estate owned | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average range	8.00%	8.00%
Residential mortgage loan commitments | Adjusted Market Bid
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments pull through rate	90.00%	90.00%
Fair Value Estimate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loan commitments	$ 133	$ 60
Fair Value Estimate | Collateral Appraisal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	11,929	13,902
Other real estate owned	$ 1,027	$ 1,449

Derivative Instruments and He63

Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)swapderivative	Dec. 31, 2017USD ($)swapderivative
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification adjustment from accumulated other comprehensive income	$ 0.5
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period	30 days
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period	60 days
Not Designated as Hedging Instrument | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 6	$ 2.7
Interest Rate Swaps | Derivative Designated as Cash Flow Hedges | Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Number of outstanding interest rate derivatives (derivative) | derivative	13	9
Aggregate notional amount	$ 1,400	$ 550
Interest Rate Swaps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 779	$ 800.5
Number of interest rate swaps (swap) | swap	82	76
Credit Contract | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 92.6	$ 80.5

Derivative Instruments and He64

Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	$ 14,921	$ 5,930
Derivative Liabilities, Fair Value	1,639	5,058
Other Assets | Derivative Designated as Cash Flow Hedges | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	2,732	816
Other Assets | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	13,515	8,936
Other Assets | Not Designated as Hedging Instrument | Residential Mortgage Loan Commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	133	60
Other Assets | Not Designated as Hedging Instrument | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	13,334	8,776
Other Assets | Not Designated as Hedging Instrument | Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	48	100
Other Liabilities | Derivative Designated as Cash Flow Hedges | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	416	1,140
Other Liabilities | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	13,282	8,934
Other Liabilities | Not Designated as Hedging Instrument | Residential Mortgage Loan Commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	0	0
Other Liabilities | Not Designated as Hedging Instrument | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	13,148	8,897
Other Liabilities | Not Designated as Hedging Instrument | Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	$ 134	$ 37

Derivative Instruments and He65

Derivative Instruments and Hedging Activities - Effect of Derivative Financial Instruments on Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	$ 1,895	$ (689)	$ 2,768	$ (360)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	259	(767)	128	(1,594)
Interest Expense | Interest Rate Swaps | Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	1,403	(420)	2,049	(219)
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)	259		128
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)		(767)		(1,594)
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	(16)	(137)	369	396
Not Designated as Hedging Instrument | Other Non-interest Income | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	(51)	(145)	334	338
Not Designated as Hedging Instrument | Other Non-interest Income | Credit Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	(15)	1	(38)	1
Not Designated as Hedging Instrument | Mortgage Banking Income | Residential Mortgage Loan Commitments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	$ 50	$ 7	$ 73	$ 57

Derivative Instruments and He66

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Assets and Derivative Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Offsetting Assets [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet	$ 16,247	$ 9,752
Interest Rate Swaps
Offsetting Assets [Line Items]
Gross Amount of Recognized Assets	14,921	5,930
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	14,921	5,930
Gross amounts not offset in the consolidated balance sheet, Financial instruments	0	0
Gross amounts not offset in the consolidated balance sheet, Cash collateral received	11,170	5,070
Gross amounts not offset in the consolidated balance sheet, Net amount	$ 3,751	$ 860

Derivative Instruments and He67

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Liabilities and Derivative Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	$ 13,698	$ 10,074
Interest Rate Swaps
Offsetting Liabilities [Line Items]
Gross Amount of Recognized Liabilities	1,639	5,058
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	1,639	5,058
Gross amounts not offset in the consolidated balance sheet, Financial instruments	0	0
Gross amounts not offset in the consolidated balance sheet, Cash collateral pledged	2	4,872
Gross amounts not offset in the consolidated balance sheet, Net amount	$ 1,637	$ 186

Business Segments (Details)

Business Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)Segment	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (segment) | Segment	2
Interest income	$ 107,639	$ 93,852	$ 204,604	$ 176,946
Interest expense	40,317	25,246	72,251	45,922
Net interest income	67,322	68,606	132,353	131,024
Provision for loan losses	(784)	535	1,333	3,585
Total non-interest income	16,127	18,391	37,037	41,144
Non-interest expense	53,750	50,413	106,031	99,778
Income before income tax expense	30,483	36,049	62,026	68,805
Income tax expense (benefit)	6,820	12,327	14,222	19,336
Net income (loss)	23,663	23,722	47,804	49,469
Preferred stock dividends	3,615	3,615	7,229	7,229
Net income (loss) available to common shareholders	20,048	20,107	40,575	42,240
Goodwill and other intangibles	17,150		17,150		$ 16,295
Assets	11,092,846		11,092,846		9,839,555
Deposits	7,295,954		7,295,954		$ 6,800,142
Combined Business Segments
Segment Reporting Information [Line Items]
Interest income	107,639	93,852	204,604	176,946
Interest expense	40,317	25,246	72,251	45,922
Net interest income	67,322	68,606	132,353	131,024
Provision for loan losses	(784)	535	1,333	3,585
Total non-interest income	16,127	18,391	37,037	41,144
Non-interest expense	53,750	50,413	106,031	99,778
Income before income tax expense	30,483	36,049	62,026	68,805
Income tax expense (benefit)	6,820	12,327	14,222	19,336
Net income (loss)	23,663	23,722	47,804	49,469
Preferred stock dividends	3,615	3,615	7,229	7,229
Net income (loss) available to common shareholders	20,048	20,107	40,575	42,240
Goodwill and other intangibles	17,150	17,615	17,150	17,615
Assets	11,092,846	10,883,548	11,092,846	10,883,548
Deposits	7,295,954	7,475,363	7,295,954	7,475,363
Non-deposit Liabilities	$ 2,860,665	$ 2,497,896	2,860,665	2,497,896
Operating Segments | Community Business Banking
Segment Reporting Information [Line Items]
Effective tax rate	24.57%	38.00%
Interest income	$ 104,110	$ 91,107	196,664	169,938
Interest expense	40,182	25,228	72,100	45,883
Net interest income	63,928	65,879	124,564	124,055
Provision for loan losses	(1,247)	535	627	3,585
Total non-interest income	7,465	6,971	15,904	12,398
Non-interest expense	37,721	30,567	72,052	60,714
Income before income tax expense	34,919	41,748	67,789	72,154
Income tax expense (benefit)	7,910	14,493	15,638	20,609
Net income (loss)	27,009	27,255	52,151	51,545
Preferred stock dividends	3,615	3,615	7,229	7,229
Net income (loss) available to common shareholders	23,394	23,640	44,922	44,316
Goodwill and other intangibles	3,629	3,633	3,629	3,633
Assets	11,017,272	10,815,752	11,017,272	10,815,752
Deposits	6,876,688	7,021,922	6,876,688	7,021,922
Non-deposit Liabilities	2,843,360	2,481,618	2,843,360	2,481,618
Operating Segments | BankMobile
Segment Reporting Information [Line Items]
Interest income	3,529	2,745	7,940	7,008
Interest expense	135	18	151	39
Net interest income	3,394	2,727	7,789	6,969
Provision for loan losses	463	0	706	0
Total non-interest income	8,662	11,420	21,133	28,746
Non-interest expense	16,029	19,846	33,979	39,064
Income before income tax expense	(4,436)	(5,699)	(5,763)	(3,349)
Income tax expense (benefit)	(1,090)	(2,166)	(1,416)	(1,273)
Net income (loss)	(3,346)	(3,533)	(4,347)	(2,076)
Preferred stock dividends	0	0	0	0
Net income (loss) available to common shareholders	(3,346)	(3,533)	(4,347)	(2,076)
Goodwill and other intangibles	13,521	13,982	13,521	13,982
Assets	75,574	67,796	75,574	67,796
Deposits	419,266	453,441	419,266	453,441
Non-deposit Liabilities	17,305	16,278	17,305	16,278
Segment Reconciling Items | BankMobile
Segment Reporting Information [Line Items]
Interest income	$ 3,500	$ 2,700	$ 7,900	$ 7,000

Non-Interest Revenues - Narrati

Non-Interest Revenues - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with customer, liability	$ 3,118		$ 3,118		$ 2,001
Contract with customer, asset	2,500		2,500		$ 1,100
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,200	$ 1,300	$ 2,700	$ 3,200

Non-Interest Revenues - Non-int

Non-Interest Revenues - Non-interest Revenues by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interchange and card revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 6,382	$ 8,648	$ 16,043	$ 22,158
Deposit Fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,632	2,133	3,724	5,260
Accounting Standards Update 2014-09
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,200	1,300	2,700	3,200
Total revenue from contracts with customers	9,106	11,771	22,056	29,592
Accounting Standards Update 2014-09 | Community Business Banking
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	477	384	986	910
Accounting Standards Update 2014-09 | BankMobile
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	8,629	11,387	21,070	28,682
Accounting Standards Update 2014-09 | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
University Fees - Card and Disbursement Fees	185	206	512	595
Total revenue from contracts with customers	8,199	10,987	20,279	28,013
Accounting Standards Update 2014-09 | Transferred at Point in Time | Interchange and card revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	6,382	8,648	16,043	22,158
Accounting Standards Update 2014-09 | Transferred at Point in Time | Deposit Fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,632	2,133	3,724	5,260
Accounting Standards Update 2014-09 | Transferred at Point in Time | Community Business Banking
Disaggregation of Revenue [Line Items]
University Fees - Card and Disbursement Fees	0	0	0	0
Total revenue from contracts with customers	477	384	986	910
Accounting Standards Update 2014-09 | Transferred at Point in Time | Community Business Banking | Interchange and card revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	183	126	406	328
Accounting Standards Update 2014-09 | Transferred at Point in Time | Community Business Banking | Deposit Fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	294	258	580	582
Accounting Standards Update 2014-09 | Transferred at Point in Time | BankMobile
Disaggregation of Revenue [Line Items]
University Fees - Card and Disbursement Fees	185	206	512	595
Total revenue from contracts with customers	7,722	10,603	19,293	27,103
Accounting Standards Update 2014-09 | Transferred at Point in Time | BankMobile | Interchange and card revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	6,199	8,522	15,637	21,830
Accounting Standards Update 2014-09 | Transferred at Point in Time | BankMobile | Deposit Fees
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,338	1,875	3,144	4,678
Accounting Standards Update 2014-09 | Transferred over Time
Disaggregation of Revenue [Line Items]
University Fees - Subscription Revenue	907	784	1,777	1,579
Total revenue from contracts with customers	907	784	1,777	1,579
Accounting Standards Update 2014-09 | Transferred over Time | Community Business Banking
Disaggregation of Revenue [Line Items]
University Fees - Subscription Revenue	0	0	0	0
Total revenue from contracts with customers	0	0	0	0
Accounting Standards Update 2014-09 | Transferred over Time | BankMobile
Disaggregation of Revenue [Line Items]
University Fees - Subscription Revenue	907	784	1,777	1,579
Total revenue from contracts with customers	$ 907	$ 784	$ 1,777	$ 1,579