Customers Bancorp (CUBI) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 05, 2013	Nov. 05, 2013
		Voting Common Stock [Member]	Class B Non-Voting Common Stock [Member]
Document Information [Line Items]	'	'	'
Document Type	'10-Q	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'Q3	'	'
Trading Symbol	'CUBI	'	'
Entity Registrant Name	'Customers Bancorp, Inc.	'	'
Entity Central Index Key	'0001488813	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	23,674,168	1,019,755

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$88,332	$12,908
Interest earning deposits	167,321	173,108
Cash and cash equivalents	255,653	186,016
Investment securities available for sale, at fair value	497,566	129,093
Loans held for sale (including $840,425 and $1,248,935 of mortgage warehouse loans at fair value at September 30, 2013 and December 31, 2012, respectively)	917,939	1,439,889
Loans receivable not covered under Loss Sharing Agreements with the FDIC	2,018,532	1,216,941
Loans receivable covered under Loss Sharing Agreements with the FDIC	81,255	107,526
Less: Allowance for loan losses	-26,800	-25,837
Total loans receivable, net (excluding loans held for sale)	2,072,987	1,298,630
FHLB, Federal Reserve Bank, and other stock	19,113	30,163
FDIC loss sharing receivable	11,038	12,343
Bank premises and equipment, net	11,055	9,672
Bank-owned life insurance	85,991	56,191
Other real estate owned (2013 $7,839; 2012 $4,109 covered under Loss Sharing Agreements with the FDIC)	13,601	8,114
Goodwill and other intangibles	3,680	3,689
Accrued interest receivable and other assets	36,489	27,434
Total assets	3,925,112	3,201,234
Deposits:	'	'
Demand, non-interest bearing	671,211	219,687
Interest bearing	2,572,101	2,221,131
Total deposits	3,243,312	2,440,818
Federal funds purchased	0	5,000
Other borrowings	235,250	471,000
Subordinated debt	2,000	2,000
Accrued interest payable and other liabilities	55,665	12,941
Total liabilities	3,536,227	2,931,759
Shareholders' equity:	'	'
Preferred stock, no par value or as set by the board; 100,000,000 shares authorized; none issued	0	0
Common stock, par value $1.00 per share; 200,000,000 shares authorized; 24,741,542 shares issued and 24,693,923 outstanding at September 30, 2013 and 18,507,121 shares issued and 18,459,502 outstanding at December 31, 2012	24,742	18,507
Additional paid in capital	306,183	212,090
Retained earnings	61,997	38,314
Accumulated other comprehensive (loss) income	-3,537	1,064
Less: cost of treasury stock; 47,619 shares at September 30, 2013 and December 31, 2012	-500	-500
Total shareholders' equity	388,885	269,475
Total liabilities and shareholders' equity	$3,925,112	$3,201,234

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Loans held for sale of mortgage warehouse loans at fair value	$840,425	$1,248,935
Other real estate owned, portion covered under Loss Sharing Agreements with the FDIC	$7,839	$4,109
Preferred stock, par value	$0	$0
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$1	$1
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	24,741,542	18,507,121
Common stock, shares outstanding	24,693,923	18,459,502
Treasury stock, shares	47,619	47,619

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income:	'	'	'	'
Loans held for sale	$9,495	$1,622	$31,536	$4,113
Loans receivable, taxable, including fees	22,363	25,368	57,489	55,850
Loans receivable, non-taxable, including fees	122	55	291	110
Investment securities, taxable	1,423	805	3,334	5,936
Investment securities, non-taxable	0	21	0	64
Other	148	91	370	225
Total interest income	33,551	27,962	93,020	66,298
Interest expense:	'	'	'	'
Deposits	5,470	5,191	15,742	15,687
Federal funds purchased	20	5	99	8
Borrowed funds	1,041	194	1,609	434
Subordinated debt	16	17	49	52
Total interest expense	6,547	5,407	17,499	16,181
Net interest income	27,004	22,555	75,521	50,117
Provision for loan losses	750	10,116	6,470	14,654
Net interest income after provision for loan losses	26,254	12,439	69,051	35,463
Non-interest income	'	'	'	'
Mortgage warehouse transactional fees	3,090	3,346	10,626	8,829
Bank-owned life insurance	615	359	1,658	948
Deposit fees	198	124	487	357
Gain on sale of investment securities	0	0	0	9,006
Accretion of FDIC loss sharing receivable	0	1,296	3,722	1,951
Gain (loss) on sale of loans	-6	-71	402	268
Other	958	4,723	2,253	5,388
Total non-interest income	4,855	9,777	19,148	26,747
Non-interest expense	'	'	'	'
Salaries and employee benefits	8,963	5,978	24,868	17,073
Occupancy	2,289	1,709	6,309	4,937
Professional services	1,191	819	3,149	2,474
Technology, communications and bank operations	1,121	699	3,023	2,037
FDIC assessments, taxes, and regulatory fees	1,105	669	3,510	2,205
Loan workout	928	617	1,674	1,519
Advertising and promotion	450	270	973	846
Other real estate owned	401	-276	962	539
Loss contingency	0	0	2,000	0
Stock-offering expenses	0	97	0	1,437
Other	1,899	1,424	5,254	4,140
Total non-interest expense	18,347	12,006	51,722	37,207
Income before income tax expense	12,762	10,210	36,477	25,003
Income tax expense	4,494	3,574	12,794	8,751
Net income	$8,268	$6,636	$23,683	$16,252
Basic earnings per share	$0.34	$0.53	$1.10	$1.39
Diluted earnings per share	$0.33	$0.51	$1.07	$1.35

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net income	$8,268	$6,636	$23,683	$16,252
Other comprehensive income (loss):	'	'	'	'
Unrealized holding gains (losses) on securities arising during the period	-10	1,597	-7,079	2,226
Income tax effect	3	-559	2,478	-779
Unrealized holding gain on securities transferred from the held-to-maturity category into the available-for-sale category	0	0	0	8,509
Income tax effect	0	0	0	-2,978
Reclassification adjustment for gains included in net income	0	0	0	-9,006
Income tax effect	0	0	0	3,152
Other comprehensive income (loss), net of tax	-7	1,038	-4,601	1,124
Comprehensive income	$8,261	$7,674	$19,082	$17,376

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
In Thousands, except Share data
Beginning balance at Dec. 31, 2011	$147,748	$11,395	$122,602	$14,496	($245)	($500)
Beginning balance, shares at Dec. 31, 2011	'	11,347,683	'	'	'	'
Comprehensive income	17,376	'	'	16,252	1,124	'
Share-based-compensation expense	1,616	'	1,616	'	'	'
Issuance of common stock, net of costs	94,762	7,112	87,650	'	'	'
Issuance of common stock, net of costs (in shares)	'	7,111,819	'	'	'	'
Exercise and redemption of warrants	0	'	'	'	'	'
Ending balance at Sep. 30, 2012	261,502	18,507	211,868	30,748	879	-500
Ending balance, shares at Sep. 30, 2012	'	18,459,502	'	'	'	'
Beginning balance at Dec. 31, 2012	269,475	18,507	212,090	38,314	1,064	-500
Beginning balance, shares at Dec. 31, 2012	18,459,502	18,459,502	'	'	'	'
Comprehensive income	19,082	'	'	23,683	-4,601	'
Share-based-compensation expense	2,461	'	2,461	'	'	'
Issuance of common stock, net of costs	97,507	6,179	91,328	'	'	'
Issuance of common stock, net of costs (in shares)	'	6,179,104	'	'	'	'
Exercise and redemption of warrants	108	32	76	'	'	'
Exercise and redemption of warrants, shares	'	31,904	'	'	'	'
Issuance of common stock under share-based-compensation arrangements	252	24	228	'	'	'
Issuance of common stock under share-based-compensation arrangements, shares	23,413	23,413	'	'	'	'
Ending balance at Sep. 30, 2013	$388,885	$24,742	$306,183	$61,997	($3,537)	($500)
Ending balance, shares at Sep. 30, 2013	24,693,923	24,693,923	'	'	'	'

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Statement Of Stockholders Equity [Abstract]	'
Public offering of common stock, costs	$5,994

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities	'	'
Net income	$23,683	$16,252
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Provision for loan losses	6,470	14,654
Loss contingency	2,000	0
Provision for depreciation and amortization	2,115	1,447
Stock-based compensation	2,461	1,616
Deferred taxes	-5	-1,112
Net amortization of investment securities premiums and discounts	368	2,897
Gain on sale of investment securities	0	-9,006
Gain on sale of SBA loans	-402	-268
Origination/purchase of loans held for sale	-17,177,835	-7,305,339
Proceeds from the sale of loans held for sale	17,697,088	6,292,453
Net increase in FDIC loss sharing receivable	-5,054	-4,537
Amortization (accretion) of fair value discounts	-724	-277
Net loss on sales of other real estate owned	254	985
Impairment charges on other real estate owned	161	468
Change in investment in bank-owned life insurance	-1,658	-1,035
Increase in accrued interest receivable and other assets	-3,888	-1,081
Increase (decrease) in accrued interest payable and other liabilities	42,976	-2,190
Net Cash Provided by (Used In) Operating Activities	588,010	-994,073
Cash Flows from Investing Activities	'	'
Proceeds from maturities, calls and principal repayments of investment securities available for sale	14,816	26,488
Proceeds from sales of investment securities available for sale	0	306,610
Purchases of investment securities available for sale	-390,735	-108,249
Proceeds from maturities and principal repayments of investment securities held to maturity	0	50,968
Net (increase) decrease in loans	-638,992	302,275
Purchase of loan portfolio	-155,306	-63,246
Proceeds from sales of SBA loans	4,276	3,689
Purchases of bank-owned life insurance	-27,965	-10,000
Net proceeds from (purchases of) FHLB, Federal Reserve Bank, and other stock	11,050	-763
Reimbursements from the FDIC on loss sharing agreements	6,134	5,308
Purchases of bank premises and equipment	-2,740	-2,343
Proceeds from sales of other real estate owned	4,582	7,383
Net Cash (Used In) Provided by Investing Activities	-1,174,880	518,120
Cash Flows from Financing Activities	'	'
Net increase in deposits	802,556	765,131
Net decrease in short-term borrowed funds	-339,000	-300,000
Proceeds from FHLB borrowings	35,000	0
Exercise and redemption of warrants	108	0
Proceeds from issuance of long-term debt, net of deferred costs of $2,914 at September 30, 2013	60,336	0
Net proceeds from stock offering	97,507	94,762
Net Cash Provided by Financing Activities	656,507	559,893
Net Increase in Cash and Cash Equivalents	69,637	83,940
Cash and Cash Equivalents - Beginning	186,016	73,570
Cash and Cash Equivalents - Ending	255,653	157,510
Supplementary Cash Flows Information	'	'
Interest paid	17,268	16,257
Income taxes paid	7,743	12,625
Non-cash items:	'	'
Transfer of loans to other real estate owned	10,259	8,293
Transfer of held to maturity investments to available for sale	$0	$268,671

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Statement Of Cash Flows [Abstract]	'
Deferred costs	$2,914

Description_of_the_Business_an

Description of the Business and Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Description of the Business and Basis of Presentation	'
	NOTE 1 — DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION
	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”). In the third quarter of 2013, Customers Bancorp also has made certain equity investments through its wholly owned subsidiaries CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd.
	The unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial statements and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim reporting. Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations, although the Bancorp believes that the disclosures made are adequate to make the information not misleading. The Bancorp’s unaudited consolidated interim financial statements reflect all adjustments that are, in the opinion of management, necessary for fair statement of the results of interim periods presented. Certain amounts reported in the 2012 consolidated financial statements have been reclassified to conform to the 2013 presentation. These reclassifications did not significantly impact the Bancorp’s financial position or results of operations.
	The accounting policies of Customers Bancorp, Inc. and Subsidiaries, as applied in the consolidated interim financial statements presented herein, are substantially the same as those followed on an annual basis as disclosed on pages 85 through 93 of Customers’ Annual Report on Form 10-K for the fiscal year ended December 31, 2012. It is suggested that these financial statements be read in conjunction with the financial statements and the notes thereto included in the latest Form 10-K.
	Operating results for the three and nine-month periods ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ended December 31, 2013.
	The Bancorp evaluated its September 30, 2013 consolidated financial statements for subsequent events through the date the financial statements were issued. The Bancorp is not aware of any additional subsequent events which would require recognition or disclosure in the financial statements.

Acquisition_Activity

Acquisition Activity	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Acquisition Activity	'
	NOTE 2 — ACQUISITION ACTIVITY
	CMS Bancorp Acquisition
	Effective April 22, 2013, the Bancorp entered into an Amendment to the Agreement and Plan of Merger (“Amendment”) to that certain Agreement and Plan of Merger, dated as of August 10, 2012 (“Merger Agreement”), by and between the Bancorp and CMS Bancorp, Inc. (“CMS”).
	The Amendment extended from April 30, 2013 to December 31, 2013 the initial date at which, if the merger of CMS with and into the Bancorp pursuant to the Merger Agreement, as amended, has not closed, either the Bancorp or CMS may terminate the Agreement, subject to the termination date being extended until March 31, 2014 under certain specified circumstances.
	The Amendment also updated the definitions of “CMS Valuation” and “Customers Valuation,” establishing the valuation date for book value as of March 31, 2013. The exchange ratio will remain fixed until settlement, using the multiples of 0.95x for CMS common equity, and 1.25x for Customers common equity for purposes of calculating the exchange ratio.
	Other key terms agreed to by the Bancorp and CMS under the Amendment provided for:
	•	CMS’s ability to have terminated the Merger Agreement, as amended, exercisable at any time after May 20, 2013, if either (i) the Bancorp had not made an investment in CMS of $1.5 million of CMS Preferred Stock, or (ii) the Bancorp and CMS had not agreed upon the terms of a $2.0 million senior secured lending facility that the Bancorp will have made available to CMS;
	•	the Bancorp’s payment of $300,000 to CMS as partial reimbursement for merger-related expenses incurred as of March 31, 2013; and
	•	the Bancorp to pay to CMS a termination fee of $1.0 million in the event the Merger Agreement, as amended, is terminated under certain provisions primarily relating to failure to consummate the Parent Merger due to non-receipt of required government approvals.
	On May 22, 2013, the Bancorp purchased $1.5 million (1,500 shares) of CMS Series A Noncumulative Perpetual Preferred Stock, satisfying the first obligation listed above. On April 23, 2013, the Bancorp paid to CMS $300,000, satisfying the second obligation listed above. The third obligation has not been triggered at this time.
	Acacia Federal Savings Bank Acquisition
	On April 4, 2013, Customers Bancorp, Inc., Acacia Life Insurance Company (“Acacia”) and Ameritas Life Insurance Corp. (together with Acacia, “Sellers”) announced their mutual decision, due to delays in the receipt of regulatory approvals, not to extend the term of that certain Stock Purchase Agreement, dated as of June 20, 2012, as amended by those certain Amendment to Stock Purchase Agreement, dated as of December 18, 2012, Amendment No. 2 to Stock Purchase Agreement dated as of January 30, 2013, and Amendment No. 3 to Stock Purchase Agreement dated as of February 28, 2013, by and among the Company and Sellers (the “Purchase Agreement”). Instead, on April 4, 2013, the parties entered into a Termination and Non-Renewal Agreement to terminate the Purchase Agreement and the transactions contemplated thereby (the “Termination Agreement”). Each party will bear its own costs and expenses in connection with the terminated transaction, without penalties. The parties mutually agreed that the termination was in each company’s best interest. Costs related to the acquisition have been expensed.
	New England Commercial Lending Acquisition
	On March 28, 2013, Customers Bank completed the purchase of certain commercial loans from Michigan-based Flagstar Bank. Under the terms of the agreement, Customers Bank acquired $182.3 million in commercial loan commitments, of which $155.1 million was drawn at the date of acquisition. Also, as part of the agreement, Customers Bank assumed the leases for two of Flagstar’s commercial lending offices in New England. The purchase price was 98.7% of loans outstanding.

Significant_Accounting_Policie

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
Significant Accounting Policies	'
	NOTE 3 — SIGNIFICANT ACCOUNTING POLICIES
	Purchased Loans
	The Bancorp believes that the varying circumstances under which it purchases loans and the diverse quality of loans purchased should drive the decision as to whether loans in a portfolio should be deemed to be purchased-credit-impaired loans (“PCI” loans). Therefore, loan acquisitions are and will be evaluated on a case-by-case basis to determine the appropriate accounting treatment. Loans acquired that do not have evidence of credit deterioration at the purchase date are and will be accounted for in accordance with ASC 310-20, Nonrefundable Fees and Other Costs, and loans acquired with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected are and will be accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality.
	Loans that are purchased that do not have evidence of credit deterioration
	Purchased performing loans are recorded at fair value and include credit and interest rate marks associated with acquisition accounting adjustments, as accounted for under the contractual cash flow method of accounting. The fair value adjustment is accreted as an adjustment to yield over the estimated contractual lives of the loans. There is no allowance for loan losses established at the acquisition date for the acquired performing loans. A provision for loan losses is recorded for any credit deterioration in these loans subsequent to acquisition.
	Loans that are purchased that have evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected
	For purchases of this type of loan, evidence of deteriorated credit quality may include past-due and non-accrual status, borrower credit scores and recent loan-to-value percentages.
	The fair value of loans with evidence of credit deterioration is recorded net of a nonaccretable difference and accretable yield. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is the nonaccretable difference, which is not included in the carrying amount of acquired loans. Subsequent to acquisition, estimates of cash flows expected to be collected are updated each reporting period based on updated assumptions regarding default rates, loss severities, and other factors that are reflective of current market conditions. Subsequent decreases to the expected cash flows will generally result in a provision for loan losses. Subsequent increases in cash flows result in a reversal of the provision for loan losses to the extent of prior charges, or a reclassification of the difference from nonaccretable to accretable with a positive impact on accretion of interest income in future periods. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized in interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of those cash flows.
	Purchased-credit-impaired loans acquired in the same fiscal quarter may be aggregated into one or more pools, provided that the loans have common risk characteristics. A pool is then accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. On a quarterly basis, the Bank re-estimates the total cash flows (both principal and interest) expected to be collected over the remaining life of each pool. These estimates incorporate assumptions regarding default rates, loss severities, the amounts and timing of prepayments and other factors that reflect then-current market conditions. If the timing and/or amounts of expected cash flows on purchased-credit-impaired loans were determined not to be reasonably estimable, no interest would be accreted and the loans would be reported as non-accrual loans; however, when the timing and amounts of expected cash flows for purchased-credit-impaired loans are reasonably estimable, interest is being accreted and the loans are being reported as performing loans.
	Recently Issued Accounting Standards
	In January, 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, to clarify that the scope of ASU 2011-11 applies to derivatives accounted for in accordance with Topic 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with relevant accounting guidance or subject to an enforceable master netting arrangement or similar agreement. The guidance in this ASU was effective for the first interim or annual period beginning on or after January 1, 2013 (the same effective date for ASU 2011-11) and is to be applied retrospectively. See “NOTE 15 — DISCLOSURES ABOUT OFFSETTING ASSETS AND LIABILITIES” for the required disclosures.
	In October, 2012, the FASB issued ASU 2012-06, Business Combinations (Topic 805): Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution (a consensus of the FASB Emerging Issues Task Force). This ASU requires an entity to subsequently account for the change in the measurement of the indemnification asset on the same basis as the change in the assets subject to indemnification. The amendments in this ASU were effective for the first interim periods or annual period beginning on or after December 15, 2012 and are to be applied prospectively. Adoption of this ASU has not had a significant impact on the Bancorp’s results of operations or financial position.
	In February, 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which adds new disclosure requirements for items reclassified out of accumulated other comprehensive income (“AOCI”). The ASU requires entities to disclose additional information about reclassification adjustments, including (1) changes in accumulated other comprehensive income balances by component and (2) significant items reclassified out of AOCI. The new disclosure requirements were effective for fiscal years and interim periods beginning after December 15, 2012 for public companies. See “NOTE 4 — CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME BY COMPONENT” for the required disclosures.

Changes_in_Accumulated_Other_C

Changes in Accumulated Other Comprehensive Income by Component	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Changes in Accumulated Other Comprehensive Income by Component	'
	NOTE 4 — CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME BY COMPONENT (a)
			Unrealized			Foreign		Total
			Gains and			Currency
			Losses on			Items
			Available-
			for-Sale
			Securities
			(dollars in thousands)
	Beginning Balance - July 1, 2013		$	(3,530	)	$	0	$	(3,530	)
	Other comprehensive loss before reclassifications			(8	)		1		(7	)
	Amounts reclassified from accumulated other comprehensive loss			0			0		0
	Net current-period other comprehensive (loss) income			(8	)		1		(7	)
	Ending balance - September 30, 2013		$	(3,538	)	$	1	$	(3,537	)
			Unrealized			Foreign		Total
			Gains and			Currency
			Losses on			Items
			Available-
			for-Sale
			Securities
	Beginning Balance - January 1, 2013		$	1,064		$	0	$	1,064
	Other comprehensive loss before reclassifications			(4,602	)		1		(4,601	)
	Amounts reclassified from accumulated other comprehensive loss			0			0		0
	Net current-period other comprehensive (loss) income			(4,602	)		1		(4,601	)
	Ending balance - September 30, 2013		$	(3,538	)	$	1	$	(3,537	)
	(a)	All amounts are net of tax. Amounts in parentheses indicate debits.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	NOTE 5 — EARNINGS PER SHARE
	The following are the components and results of the Bancorp’s earnings per share calculation for the periods presented:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
		(dollars in thousands, except per share data)
	Net income allocated to common shareholders	$	8,268	$	6,636	$	23,683	$	16,252
	Weighted-average number of common shares - basic		24,678,317		12,465,744		21,494,880		11,723,090
	Share-based compensation plans		475,987		310, 845		383,326		231,674
	Warrants		182,898		134,926		175,999		112,265
	Weighted-average number of common shares - diluted		25,337,202		12,911,515		22,054,205		12,067,029
	Basic earnings per share	$	0.34	$	0.53	$	1.1	$	1.39
	Diluted earnings per share	$	0.33	$	0.51	$	1.07	$	1.35
	The following is a summary of securities that could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the periods presented:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Weighted-average anti-dilutive securities:
	Share-based compensation awards		92,245		6,592		87,129		6,592
	Warrants		118,745		129,946		118,745		129,946
	Total anti-dilutive securities		210,990		136,538		205,874		136,538

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Investment Securities	'
	NOTE 6 — INVESTMENT SECURITIES
	In May 2012, Customers Bancorp reclassified its $269.0 million held-to-maturity investment portfolio to available for sale. Due to its strong outlook for loan growth, falling interest rates, and its decision to postpone its initial public offering of stock, the Bancorp decided to proceed with this reclassification to provide liquidity. In accordance with regulatory and accounting requirements, the Bancorp is prohibited from classifying security purchases as held to maturity for a period of two years, ending May 2014.
	The amortized cost and approximate fair value of investment securities as of September 30, 2013 and December 31, 2012 are summarized as follows:
			September 30, 2013
			Amortized		Gross		Gross		Fair Value
			Cost		Unrealized		Unrealized
					Gains		Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities (1)		$	454,933	$	1,410	$	6,822	$	449,521
	Corporate notes			25,000		163		23		25,140
	Equity securities			23,074		81		250		22,905
			$	503,007	$	1,654	$	7,095	$	497,566
	-1	Includes private-label securities with an aggregate amortized cost of $521 and an aggregate fair value of $513.
			December 31, 2012
			Amortized		Gross		Gross		Fair Value
			Cost		Unrealized		Unrealized
					Gains		Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities (1)		$	102,449	$	1,795	$	109	$	104,135
	Corporate notes			25,000		89		137		24,952
	Equity securities			6		0		0		6
			$	127,455	$	1,884	$	246	$	129,093
	-1	Includes private-label securities with an aggregate amortized cost of $629 and an aggregate fair value of $612.
	The following table shows proceeds from the sale of available-for-sale investment securities and gross gains and gross losses realized on those sales for the three and nine months ended September 30, 2013 and 2012:
			Three months ended September 30,				Nine months ended September 30,
			2013		2012		2013		2012
			(dollars in thousands)
	Proceeds from sale of available-for-sale securities		$	0	$	0	$	0	$	306,610
	Gross gains		$	0	$	0	$	0	$	9,006
	Gross losses			0		0		0		0
	Net gains		$	0	$	0	$	0	$	9,006
	These gains and losses were determined using the specific identification method and were included in non-interest income.
	The following table shows available-for-sale debt securities by stated maturity. Debt securities backed by mortgages have expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and are, therefore, classified separately with no specific maturity date:
			September 30, 2013
			Amortized		Fair
			Cost		Value
			(dollars in thousands)
	Due in one year or less		$	0	$	0
	Due after one year through five years			25,000		25,140
	Due after five years through ten years			0		0
	Due after ten years			0		0
	Mortgage-backed securities			454,933		449,521
	Total debt securities		$	479,933	$	474,661
	The Bancorp’s investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2013 and December 31, 2012 were as follows:
			September 30, 2013
			Less Than 12 Months				12 Months or More				Total
			Fair Value		Unrealized		Fair Value		Unrealized		Fair Value		Unrealized
					Losses				Losses				Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities		$	129,120	$	6,811	$	309	$	11	$	129,429	$	6,822
	Corporate notes			4,980		20		4,997		3		9,977		23
	Equity securities			22,068		250		0		0		22,068		250
	Total		$	156,168	$	7,081	$	5,306	$	14	$	161,474	$	7,095
			December 31, 2012
			Less Than 12 Months				12 Months or More				Total
			Fair Value		Unrealized		Fair Value		Unrealized		Fair Value		Unrealized
					Losses				Losses				Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities		$	5,695	$	87	$	429	$	22		6,124	$	109
Corporate notes			0		0		9,862		137		9,862		137
Total		$	5,695	$	87	$	10,291	$	159	$	15,986	$	246
At September 30, 2013, there were twenty available-for-sale investment securities in the less-than-twelve-month category and seven available-for-sale investment securities in the twelve-month-or-more category. At December 31, 2012, there were two available-for-sale investment securities in the less-than-twelve-month category and eight available-for-sale investment securities in the twelve-month-or-more category. In management’s opinion, the unrealized losses reflect primarily changes in interest rates due to changes in economic conditions and the liquidity of the market, and not credit quality. In addition, the Bancorp does not believe that it will be more likely than not that the Bancorp will be required to sell the securities prior to maturity or market-price recovery.
During June 2012, five corporate bonds in the Bancorp’s portfolio were downgraded to ratings of A to A-. These downgrades were anticipated since these bonds were placed on negative watch in February 2012. The Bancorp analyzed these bonds in more detail at the time of downgrade. The Bancorp does not intend to sell these debt securities prior to recovery, and it is more likely than not that the Bancorp will not have to sell these debt securities prior to recovery. These bonds continue to pay their scheduled interest payments on time. No additional downgrades are anticipated at this time. The holdings are all in the financial services industry and all issuers are well capitalized.
At September 30, 2013 and December 31, 2012, Customers Bank had pledged investment securities aggregating $329.8 million and $103.5 million fair value, respectively, as collateral for borrowings from the FHLB. No amounts were outstanding against the securities pledged as collateral as of September 30, 2013.
During the third quarter of 2013, Customers Bancorp through its foreign subsidiaries, CB Green Ventures Pte Ltd. and CUBI India Ventures Pte Ltd., purchased 4.1 million in common shares of Religare Enterprises, Ltd., a diversified financial services company domiciled in India. The total investment as of September 30, 2013 is $23.1 million, 2.8% of the current outstanding shares of Religare Enterprises, Inc.

Loans_Receivable_and_Allowance

Loans Receivable and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Loans Receivable and Allowance for Loan Losses	'
	NOTE 7 — LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
	Loans receivable excludes loans held for sale, largely mortgage warehouse loans, of $917,939 and $1,439,889 as of September 30, 2013 and December 31, 2012, respectively.
	The composition of net loans receivable was as follows:
			September 30,			December 31,
			2013			2012
			(dollars in thousands)
	Construction		$	22,192		$	27,792
	Commercial real estate			29,623			44,901
	Commercial and industrial			6,826			11,153
	Residential real estate			19,233			19,952
	Manufactured housing			3,381			3,728
	Total loans receivable covered under FDIC loss sharing agreements (1)			81,255			107,526
	Construction			34,674			28,897
	Commercial real estate			1,490,930			835,488
	Commercial and industrial			213,794			75,118
	Mortgage warehouse			1,006			9,565
	Manufactured housing			142,677			154,703
	Residential real estate			133,503			109,430
	Consumer			1,889			2,061
	Total loans receivable not covered under FDIC loss sharing agreements			2,018,473			1,215,262
	Total loans receivable (2)			2,099,728			1,322,788
	Deferred (fees) costs, net			59			1,679
	Allowance for loan losses			(26,800	)		(25,837	)
	Loans receivable, net		$	2,072,987		$	1,298,630
	-1	Loans that were acquired in two FDIC-assisted transactions and are covered under loss sharing agreements with the FDIC are referred to as “covered” loans throughout these financial statements.
	-2	Customers Bank takes advantage of Federal Home Loan Bank (“FHLB”) programs for overnight and term borrowings. Under the terms of a blanket collateral agreement, advances from the FHLB are collateralized by qualifying first-mortgage loans.
	Non-Covered Nonaccrual Loans and Loans Past Due
	The following tables summarize non-covered loans, by class:
			September 30, 2013
			30-89 Days			Greater			Total Past			Non-			Current (2)			PCI			Total
			Past Due (1)			Than			Due (1)			Accrual						Loans (5)			Loans (4)
						90 Days (1)
			(dollars in thousands)
	Commercial and industrial		$	0		$	0		$	0		$	221		$	211,404		$	2,169		$	213,794
	Commercial real estate			0			0			0			10,625			1,442,061			38,244			1,490,930
	Construction			0			0			0			2,050			31,683			941			34,674
	Residential real estate			400			0			400			945			121,550			10,608			133,503
	Consumer			0			0			0			0			1,469			420			1,889
	Mortgage warehouse			0			0			0			0			1,006			0			1,006
	Manufactured housing (3)			6,311			3,095			9,406			1,101			126,981			5,189			142,677
	Total		$	6,711		$	3,095		$	9,806		$	14,942		$	1,936,154		$	57,571		$	2,018,473
			December 31, 2012
			30-89 Days			Greater			Total Past			Non-			Current (2)			PCI			Total
			Past Due (1)			Than			Due (1)			Accrual						Loans (5)			Loans (4)
						90 Days (1)
			(dollars in thousands)
	Commercial and industrial		$	38		$	0		$	38		$	288		$	72,715		$	2,077		$	75,118
	Commercial real estate			1,437			0			1,437			17,770			770,508			45,773			835,488
	Construction			0			0			0			2,423			25,022			1,452			28,897
	Residential real estate			381			0			381			1,669			95,396			11,984			109,430
	Consumer			0			0			0			56			1,486			519			2,061
	Mortgage warehouse			0			0			0			0			9,565			0			9,565
	Manufactured housing (3)			9,234			1,966			11,200			141			135,924			7,438			154,703
	Total		$	11,090		$	1,966		$	13,056		$	22,347		$	1,110,616		$	69,243		$	1,215,262
	-1	Loan balances do not include non-accrual loans.
	-2	Loans where payments are due within 29 days of the scheduled payment date.
	-3	Purchased manufactured housing loans, purchased in 2010, are subject to cash reserves held at the Bank that are used to fund the past-due payments when the loan becomes 90-days or more delinquent.
	-4	Loans exclude deferred costs and fees.
	-5	Purchased-credit-impaired loans that were aggregated into pools are accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows, the past due status of the pools, or that of the individual loans within the pools, is not meaningful. Because we recognize interest income on each pool of loans, they are all considered to be performing. PCI loans that are not in pools accrete interest when the timing and amount of their expected cash flows are reasonably estimable, and being reported as performing loans.
	Covered Nonaccrual Loans and Loans Past Due
	The following tables summarize covered loans, by class:
			September 30, 2013
			30-89 Days			Greater Than			Total Past			Non-			Current			PCI			Total
Past Due (1)			90 Days			Due (1)			Accrual			(2)(3)			Loans (5)			Loans (4)
			Past Due (1)
		(dollars in thousands)
Commercial and industrial		$	0		$	0		$	0		$	0		$	4,394		$	2,432		$	6,826
Commercial real estate			0			0			0			1,821			17,413			10,389			29,623
Construction			0			0			0			3,382			5,920			12,890			22,192
Residential real estate			0			0			0			564			14,328			4,341			19,233
Manufactured housing			86			0			86			21			3,138			136			3,381
Total		$	86		$	0		$	86		$	5,788		$	45,193		$	30,188		$	81,255
		December 31, 2012
		30-89 Days			Greater Than			Total Past			Non-			Current			PCI			Total
		Past Due (1)			90 Days			Due (1)			Accrual			(2)(3)			Loans (5)			Loans (4)
					Past Due (1)
		(dollars in thousands)
Commercial and industrial		$	220		$	0		$	220		$	100		$	8,404		$	2,429		$	11,153
Commercial real estate			0			0			0			3,712			20,859			20,330			44,901
Construction			0			0			0			5,244			6,472			16,076			27,792
Residential real estate			0			0			0			1,358			14,226			4,368			19,952
Manufactured housing			48			0			48			90			3,527			63			3,728
Total		$	268		$	0		$	268		$	10,504		$	53,488		$	43,266		$	107,526
-1	Loans balances do not include nonaccrual loans.
-2	Loans receivable that were not identified upon acquisition as a loan with credit deterioration.
-3	Loans where payments are due within 29 days of the scheduled payment date.
-4	Loans exclude deferred costs and fees.
-5	Purchased-credit-impaired loans that were aggregated into pools are accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows, the past due status of the pools, or that of the individual loans within the pools, is not meaningful. Because we recognize interest income on each pool of loans, they are all considered to be performing. PCI loans that are not in pools accrete interest when the timing and amount of their expected cash flows are reasonably estimable, and being reported as performing loans.
Impaired Loans — Covered and Non-Covered
The following table presents a summary of impaired loans:
		September 30, 2013									For the Nine Months Ended
											September 30, 2013
		Recorded			Unpaid			Related			Average			Interest
		Investment			Principal			Allowance			Recorded			Income
		Net of			Balance						Investment			Recognized
		Charge Offs
		(dollars in thousands)
With no related allowance recorded:
Commercial and industrial		$	16,829		$	16,891					$	6,697		$	362
Commercial real estate			16,223			17,075						23,271			548
Construction			2,830			4,100						6,545			14
Consumer			21			21						133			0
Residential real estate			2,827			2,827						2,791			36
With an allowance recorded:
Commercial and industrial			3,333			4,603		$	961			1,192			157
Commercial real estate			6,687			7,637			2,233			7,919			169
Construction			1,148			1,148			368			5,544			46
Consumer			54			54			1			46			4
Residential real estate			378			378			187			953			2
Total		$	50,330		$	54,734		$	3,750		$	55,091		$	1,338
		December 31, 2012									For the Nine Months Ended
											September 30, 2012
		Recorded			Unpaid			Related			Average			Interest
		Investment			Principal			Allowance			Recorded			Income
		Net of			Balance						Investment			Recognized
		Charge Offs
		(dollars in thousands)
With no related allowance recorded:
Commercial and industrial		$	3,844		$	3,844					$	5,191		$	160
Commercial real estate			26,626			27,477						22,205			748
Construction			6,588			6,618						7,627			19
Consumer			101			101						105			3
Residential real estate			3,188			3,188						2,382			55
With an allowance recorded:
Commercial and industrial			374			374		$	295			748			9
Commercial real estate			8,708			10,022			2,505			9,071			205
Construction			5,116			6,022			1,541			6,903			154
Consumer			100			100			14			29			4
Residential real estate			1,331			1,331			270			967			13
Total		$	55,976		$	59,077		$	4,625		$	55,228		$	1,370
Troubled Debt Restructurings
At September 30, 2013, there were $6.9 million in loans reported as troubled debt restructurings (“TDR”), and at September 30, 2012, there were $8.2 million in loans reported as troubled debt restructurings. All TDRs are reported as impaired loans in the calendar year of their restructuring. In subsequent years, a TDR may cease being reported as impaired if the loan was modified at a market rate and has performed according to the modified terms for at least nine months. A loan that has been modified at a below-market rate will be returned to performing status if it satisfies the six-month performance requirement; however, it will remain classified as impaired.
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 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 TDRs.
The following is an analysis of loans modified in a troubled debt restructuring by type of concession for the three and nine months ended September 30, 2013 and 2012. There were no modifications that involved forgiveness of debt.
		TDRs in			TDRs in			Total
		Compliance			Compliance
		with Their			with Their
		Modified			Modified
		Terms and			Terms and
		Accruing			Not
		Interest			Accruing
					Interest
		(dollars in thousands)
Three months ended September 30, 2013
Extended under forbearance		$	0		$	0		$	0
Multiple extensions resulting from financial difficulty			0			0			0
Interest-rate reductions			0			12			12
Total		$	0		$	12		$	12
Nine months ended September 30, 2013
Extended under forbearance		$	0		$	0		$	0
Multiple extensions resulting from financial difficulty			0			0			0
Interest-rate reductions			93			1,179			1,272
Total		$	93		$	1,179		$	1,272
Three months ended September 30, 2012
Extended under forbearance		$	0		$	471		$	471
Multiple extensions resulting from financial difficulty			0			0			0
Interest-rate reductions			0			61			61
Total		$	0		$	532		$	532
Nine months ended September 30, 2012
Extended under forbearance		$	0		$	471		$	471
Multiple extensions resulting from financial difficulty			47			0			47
Interest-rate reductions			268			61			329
Total		$	315		$	532		$	847
The following table provides, by class, the number of loans modified in troubled debt restructurings and the recorded investments and unpaid principal balances during the three and nine months ended September 30, 2013 and 2012.
		TDRs in Compliance with Their						TDRs in
		Modified Terms and Accruing						Compliance
		Interest						with Their
								Modified
								Terms and Not
								Accruing Interest
		Number			Recorded			Number			Recorded
		of Loans			Investment			of Loans			Investment
		(dollars in thousands)
Three months ended September 30, 2013
Commercial and industrial			0		$	0			0		$	0
Commercial real estate			0			0			0			0
Construction			0			0			0			0
Manufactured housing			0			0			1			12
Residential real estate			0			0			0			0
Consumer			0			0			0			0
Total			0		$	0			1		$	12
Nine months ended September 30, 2013
Commercial and industrial			0		$	0			0		$	0
Commercial real estate			0			0			0			0
Construction			0			0			0			0
Manufactured housing			2			60			11			1,179
Residential real estate			0			0			0			0
Consumer			1			33			0			0
Total			3		$	93			11		$	1,179
Three months ended September 30, 2012
Commercial and industrial			0		$	0			0		$	0
Commercial real estate			0			0			0			0
Construction			0			0			0			0
Manufactured housing			0			0			1			61
Residential real estate			0			0			2			141
Consumer			0			0			1			330
Total			0		$	0			4		$	532
Nine months ended September 30, 2012
Commercial and industrial			0		$	0			0		$	0
Commercial real estate			0			0			0			0
Construction			0			0			0			0
Manufactured housing			6			315			1			61
Residential real estate			0			0			2			141
Consumer			0			0			1			330
Total			6		$	315			4		$	532
At September 30, 2013 and 2012, there were no commitments to lend additional funds to debtors whose terms have been modified in troubled debt restructuring.
All 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 credit losses. There was $0 in specific reserves resulting from the addition of TDR modifications for both the three and nine months ended September 30, 2013 and 2012. There were no TDRs that defaulted in the three and nine month periods ended September 30, 2013 and 2012.
Credit Quality Indicators
Credit quality indicators for commercial and industrial, commercial real estate, residential real estate, and construction loans are based on an internal risk-rating system and are assigned at the loan origination and reviewed on a periodic or on an “as needed” basis. Consumer, mortgage warehouse, and manufactured housing loans are evaluated on the basis of the payment activity of the loan.
To facilitate the monitoring of credit quality within the commercial and industrial, commercial real estate, construction portfolio, and residential real estate classes, and for purposes of analyzing historical loss rates used in the determination of the allowance for loan losses for the respective portfolio class, the Bank utilizes the following categories of risk ratings: pass/satisfactory, 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 that do not have identified potential or well defined weaknesses and for which 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 and estimates, the risk rating process is intended to permit management to identify riskier credits in a timely manner and allocate the appropriate resources to managing the loans.
The Bank assigns a special mention rating to loans that have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may, at some future date, result in the deterioration of the repayment prospects for the loan and the Bank’s credit position.
The Bank assigns a substandard rating to loans that are inadequately protected by the current sound worth and paying capacity of the borrower or of the collateral pledged. Substandard loans have well defined weaknesses or weaknesses that could jeopardize the orderly repayment of the debt. Loans in this category also are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies noted are not addressed and corrected.
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.
When it is determined that these loans are uncollectible they are charged off in the period in which they are determined to be uncollectible. Loans, or portions of loans, classified as loss indicate that the Bank does not expect to collect the amounts classified as a loss.
Risk ratings are not established for home equity loans, consumer loans, and installment loans, mainly because these portfolios consist of a larger number of homogenous loans with smaller balances. Instead, these portfolios are evaluated for risk mainly based on aggregate payment history, through the monitoring of delinquency levels and trends and are classified as performing and nonperforming.
The following presents the credit quality tables as of September 30, 2013 and December 31, 2012 for the non-covered loan portfolio:
		September 30, 2013
		Commercial			Commercial			Construction			Residential
		and			Real Estate						Real Estate
		Industrial
		(dollars in thousands)
Pass/Satisfactory		$	200,651		$	1,460,484		$	32,499		$	130,504
Special Mention			12,861			16,200			88			1,380
Substandard			282			14,246			2,087			1,619
Doubtful			0			0			0			0
Total		$	213,794		$	1,490,930		$	34,674		$	133,503
		Consumer			Mortgage			Manufactured
					Warehouse			Housing
		(dollars in thousands)
Performing		$	1,889		$	1,006		$	141,576
Nonperforming (1)			0			0			1,101
Total		$	1,889		$	1,006		$	142,677
-1	Includes loans that are on nonaccrual status at September 30, 2013.
		December 31, 2012
		Commercial			Commercial			Construction			Residential
		and			Real Estate						Real Estate
		Industrial
		(dollars in thousands)
Pass/Satisfactory		$	70,955		$	794,187		$	26,020		$	105,490
Special Mention			3,836			18,737			454			1,017
Substandard			327			21,801			1,971			2,919
Doubtful			0			763			452			4
Total		$	75,118		$	835,488		$	28,897		$	109,430
		Consumer			Mortgage			Manufactured
					Warehouse			Housing
		(dollars in thousands)
Performing		$	2,005		$	9,565		$	154,562
Nonperforming (1)			56			0			141
Total		$	2,061		$	9,565		$	154,703
-1	Includes loans that are on nonaccrual status at December 31, 2012.
The following presents the credit quality tables as of September 30, 2013 and December 31, 2012 for the covered loan portfolio:
		September 30, 2013
		Commercial			Commercial			Construction			Residential
		and			Real Estate						Real Estate
		Industrial
		(dollars in thousands)
Pass/Satisfactory		$	4,730		$	17,920		$	1,972		$	14,245
Special Mention			119			3,020			3,949			455
Substandard			1,977			8,683			16,271			4,533
Doubtful			0			0			0			0
Total		$	6,826		$	29,623		$	22,192		$	19,233
		Manufactured
		Housing
		(dollars in thousands)
Performing		$	3,274
Nonperforming (1)			107
Total		$	3,381
-1	Includes loans that are on nonaccrual status at September 30, 2013.
		December 31, 2012
		Commercial			Commercial			Construction			Residential
		and			Real Estate						Real Estate
		Industrial
		(dollars in thousands)
Pass/Satisfactory		$	8,888		$	26,195		$	2,434		$	14,021
Special Mention			51			225			4,038			455
Substandard			2,214			18,481			21,320			5,476
Doubtful			0			0			0			0
Total		$	11,153		$	44,901		$	27,792		$	19,952
		Manufactured
		Housing
		(dollars in thousands)
Performing		$	3,638
Nonperforming (1)			90
Total		$	3,728
-1	Includes loans that are on nonaccrual status at December 31, 2012.
Allowance for loan losses
The changes in the allowance for loan losses for the three and nine months ended September 30, 2013 and 2012 and the loans and allowance for loan losses by loan segment based on impairment evaluation method are as follows. Please read in conjunction with disclosures in the Bancorp’s 2012 Annual Report on Form 10-K.
		Commercial			Commercial			Construction			Residential			Manufactured			Consumer			Mortgage			Residual			Total
		and			Real Estate						Real Estate			Housing (1)						Warehouse			Reserve
		Industrial
		(dollars in thousands)
Three months ended September 30, 2013
Beginning Balance, July 1, 2013		$	2,485		$	16,685		$	4,317		$	3,552		$	678		$	106		$	56		$	263		$	28,142
Charge-offs			1,311			851			0			116			0			16			0			0			2,294
Recoveries			16			186			0			0			0			0			0			0			202
Provision for loan losses			2,029			(349	)		(1,163	)		(216	)		1			13			(14	)		449			750
Ending Balance, September 30, 2013		$	3,219		$	15,671		$	3,154		$	3,220		$	679		$	103		$	42		$	712		$	26,800
Nine months ended September 30, 2013
Beginning Balance, January 1, 2013		$	1,477		$	15,439		$	3,991		$	3,233		$	750		$	154		$	71		$	722		$	25,837
Charge-offs			1,407			2,742			1,470			315			0			16			0			0			5,950
Recoveries			181			246			0			7			0			9			0			0			443
Provision for loan losses			2,968			2,728			633			295			(71	)		(44	)		(29	)		(10	)		6,470
Ending Balance, September 30, 2013		$	3,219		$	15,671		$	3,154		$	3,220		$	679		$	103		$	42		$	712		$	26,800
At September 30, 2013
Loans:
Individually evaluated for impairment		$	20,162		$	22,910		$	3,978		$	3,205		$	0		$	75		$	0		$	0		$	50,330
Collectively evaluated for impairment			195,857			1,449,009			39,058			134,582			140,869			1,258			1,006			0			1,961,639
Loans acquired with credit deterioration			4,601			48,634			13,830			14,949			5,189			556			0			0			87,759
Market discounts/premiums/valuation adjustments																											59
																										$	2,099,787
Allowance for loan losses:
Individually evaluated for impairment		$	961		$	2,233		$	368		$	187		$	0		$	1		$	0		$	0		$	3,750
Collectively evaluated for impairment			1,991			8,315			241			1,115			80			40			42			712			12,536
Loans acquired with credit deterioration			267			5,123			2,545			1,918			599			62			0			0			10,514
		$	3,219		$	15,671		$	3,154		$	3,220		$	679		$	103		$	42		$	712		$	26,800
Three months ended September 30, 2012
Beginning Balance, July 1, 2012		$	1,503		$	8,266		$	4,352		$	1,080		$	40		$	75		$	802		$	0		$	16,118
Charge-offs			266			283			475			365			0			27			0			0			1,416
Recoveries			98			33			3			0			0			22			0			0			156
Provision for loan losses			387			5,923			1,139			2,262			858			279			(732	)		0			10,116
Ending Balance, September 30, 2012		$	1,722		$	13,939		$	5,019		$	2,977		$	898		$	349		$	70		$	0		$	24,974
Nine months ended September 30, 2012
Beginning Balance, January 1, 2012		$	1,441		$	7,029		$	4,656		$	844		$	18		$	61		$	929		$	54		$	15,032
Charge-offs			300			1,426			2,666			565			0			37			0			0			4,994
Recoveries			164			83			3			5			0			27			0			0			282
Provision for loan losses			417			8,253			3,026			2,693			880			298			(859	)		(54	)		14,654
Ending Balance, September 30, 2012		$	1,722		$	13,939		$	5,019		$	2,977		$	898		$	349		$	70		$	0		$	24,974
At September 30, 2012
Loans:
Individually evaluated for impairment		$	4,558		$	37,250		$	13,169		$	4,540		$	0		$	273		$	0		$	0		$	59,790
Collectively evaluated for impairment			79,448			543,772			11,056			100,751			150,876			11,356			9,321			0			906,580
Loans acquired with credit deterioration			5,774			70,915			18,904			15,819			13,113			2,125			0			0			126,650
Market discounts/premiums/valuation adjustments																											(5,921	)
																										$	1,087,099
Allowance for loan losses:
Individually evaluated for impairment		$	349		$	2,787		$	2,450		$	250		$	0		$	3		$	0		$	0		$	5,839
Collectively evaluated for impairment			877			5,379			262			878			757			93			70			0			8,316
Loans acquired with credit deterioration			496			5,773			2,307			1,849			141			253			0			0			10,819
		$	1,722		$	13,939		$	5,019		$	2,977		$	898		$	349		$	70		$	0		$	24,974
-1	The non-covered manufactured housing portfolio was 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 September 30, 2013 and 2012, funds available for reimbursement, if necessary, were $2.9 million and $4.1 million, respectively. Quarterly, these funds are evaluated to determine if they would be sufficient to absorb probable losses within the manufactured housing portfolio.
The changes in accretable yield related to purchased-credit-impaired loans for the three and nine months ended September 30, 2013 and 2012 were as follows:
For the Three Months Ended September 30,		2013			2012
		(dollars in thousands)
Accretable yield balance, beginning of period		$	27,649		$	43,230
Accretion to interest income			(1,362	)		(7,384	)
Reclassification from nonaccretable difference and disposals, net			(754	)		(147	)
Accretable yield balance, end of period		$	25,533		$	35,699
For the Nine Months Ended September 30,		2013			2012
		(dollars in thousands)
Accretable yield balance, beginning of period		$	32,174		$	45,358
Accretion to interest income			(5,034	)		(9,443	)
Reclassification from nonaccretable difference and disposals, net			(1,607	)		(216	)
Accretable yield balance, end of period		$	25,533		$	35,699

FDIC_Loss_Sharing_Receivable

FDIC Loss Sharing Receivable	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
FDIC Loss Sharing Receivable	'
	NOTE 8 — FDIC LOSS SHARING RECEIVABLE
	The following table summarizes the activity related to the FDIC loss sharing receivable for the three and nine months ended September 30, 2013 and 2012:
	Three Months Ended September 30,	2013			2012
		(dollars in thousands)
	Balance, beginning of period	$	14,169		$	12,376
	Change in FDIC loss sharing receivable		(125	)		3,796
	Reimbursement from the FDIC		(3,006	)		(3,866	)
	Balance, end of period	$	11,038		$	12,306
	Nine Months Ended September 30,	2013			2012
		(dollars in thousands)
	Balance, beginning of period	$	12,343		$	13,077
	Change in FDIC loss sharing receivable		4,829			4,537
	Reimbursement from the FDIC		(6,134	)		(5,308	)
	Balance, end of period	$	11,038		$	12,306

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Borrowings	'
	NOTE 9 — BORROWINGS
	During July 2013 ($55.0 million) and August 2013 ($8.3 million), Customers Bancorp issued five-year senior unsecured notes aggregating $63.25 million at 6.375%. Interest on the debt is payable quarterly. Net proceeds to Customers Bancorp after issuance costs were $60.4 million.

Shareholders_Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Shareholders' Equity	'
	NOTE 10 — SHAREHOLDERS’ EQUITY
	During the nine months ended September 30, 2013, the Bancorp issued 23,413 shares of common stock under share-based compensation arrangements. In the third quarter of 2013, 31,904 shares of Class B Non-Voting common stock were issued upon exercise of outstanding warrants, and 3.7 million shares of Class B Non-Voting common stock were converted into 3.7 million shares of Voting common stock. In addition, warrants to purchase 17,227 shares of voting common stock and 17,227 shares of Class B Non-Voting stock were repurchased in the third quarter of 2013.
	On May 22, 2013, the Bancorp sold 6,179,104 shares of new issue voting common stock at a price to the public of $16.75 per share. The net proceeds to Customers after deducting underwriting discounts and commissions and offering expenses were $97.5 million.
	During the third quarter of 2012, the Bancorp sold 7,111,819 shares of its common stock in private offerings. The net proceeds to Customers after deducting underwriting discounts and commissions and offering expenses were $94.8 million.
	On May 8, 2012, the Bancorp announced that, due to market conditions, it had postponed its initial public offering of voting common stock. Costs related to this postponed offering in the amount of $1.4 million were expensed.

ShareBased_Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Share-Based Compensation	'
	NOTE 11 — SHARE-BASED COMPENSATION
	Stock Options
	Options to purchase an aggregate of 617,910 and 92,687 shares of voting common stock, representing 10% and 1.5% of the number of shares issued in the May 2013 offering of voting common stock, were granted to the Chief Executive Officer and the Chief Operating Officer in connection with the completion of the offering pursuant to their existing employment agreements, respectively. The options will vest over five years from the date of grant, subject to a 50% increase in the value of the Bancorp’s Voting Common Stock and have a term of 10 years. In addition, in matters unrelated to the May 2013 offering, options to purchase an aggregate of 70,000 shares of Voting Common Stock were granted to certain other officers. The fair values of the options were estimated using the Black-Scholes option pricing model. The following table presents the weighted-average assumptions used and the resulting weighted-average fair value of an option.
		September 30, 2013			December 31, 2012
	Weighted-average risk-free interest rate		1.41	%		1.15	%
	Expected dividend yield		0	%		0	%
	Weighted-average expected volatility		13.77	%		17.47	%
	Expected life (in years)		7			6.98
	Weighted-average fair value	$	3.16		$	3.04
	The following table summarizes stock option activity for the nine months ended September 30, 2013.
		Number			Weighted-			Weighted-		Aggregate
		of Options			average			average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual
								Term in Years
		(aggregate intrinsic value in thousands)
	Outstanding at January 1, 2013		2,003,889		$	12.49
	Granted		780,597			16.67
	Forfeited		(5,000	)		14.94
	Outstanding at September 30, 2013		2,779,486		$	13.66			8.16	$	7,480
	Vested and expected to vest at September 30, 2013		2,779,486		$	13.66			8.16	$	7,480
	Exercisable at September 30, 2013		14,438			20.06			3.57		12

Regulatory_Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Regulatory Matters	'
	NOTE 12 — REGULATORY MATTERS
	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 the Bancorp’s consolidated financial statements. At September 30, 2013, the Bank and the Bancorp exceeded all capital adequacy requirements to which they are subject.
	The Bank experienced rapid loan growth during the final days of 2012. During the standard closing process of the Bank’s December 2012 financial statements, management determined on January 30, 2013 that the rapid loan growth resulted in a reduction in the Bank’s capital ratios, causing the Bank to become adequately capitalized as of December 31, 2012. Management immediately transferred sufficient capital from the Bancorp to the Bank which returned the Bank to well-capitalized status. Sufficient cash is maintained at the Bancorp to ensure that the Bank remains well capitalized, and management remains committed to taking all steps necessary to ensure that both the Bancorp and the Bank remain well capitalized going forward. The Bank met the regulatory standards to be considered well capitalized as of September 30, 2013. Since the Bank was adequately capitalized at December 31, 2012, regulatory approval was required to accept, renew or roll over any brokered deposits. Effective January 1, 2013, the interest rate paid for deposits by institutions that are less than well capitalized was limited to 75 basis points above the national rate for similar products unless the institution can support to the FDIC that prevailing rates in its market area exceed the national average. This limitation on rates paid for deposits was removed effective with the Bank complying with the well capitalized thresholds, and as the Bank exceeds the well capitalized thresholds as of September 30, 2013, the Bank is not subject to any limits on interest rates paid for deposits.
	The Bancorp’s and the Bank’s capital amounts and ratios at September 30, 2013 and December 31, 2012 are as follows:
		Actual					For Capital Adequacy					To Be Well Capitalized
							Purposes					Under
												Prompt Corrective Action
												Provisions
	(dollars in thousands)	Amount		Ratio			Amount		Ratio			Amount		Ratio
	As of September 30, 2013:
	Total capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	413,900		13.6	%	$	243,500		8	%		N/A		N/A
	Customers Bank	$	427,809		14.18	%	$	241,298		8	%	$	301,622		10	%
	Tier 1 capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	386,517		12.7	%	$	121,750		4	%		N/A		N/A
	Customers Bank	$	400,426		13.28	%	$	120,649		4	%	$	180,973		6	%
	Tier 1 capital (to average assets)
	Customers Bancorp, Inc.	$	386,517		10.63	%	$	145,388		4	%		N/A		N/A
	Customers Bank	$	400,426		11.04	%	$	145,043		4	%	$	181,303		5	%
	As of December 31, 2012:
	Total capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	289,035		11.26	%	$	205,443		8	%		N/A		N/A
	Customers Bank	$	244,710		9.53	%	$	205,442		8	%	$	256,802		10	%
	Tier 1 capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	262,719		10.23	%	$	102,722		4	%		N/A		N/A
	Customers Bank	$	218,394		8.5	%	$	102,721		4	%	$	154,081		6	%
	Tier 1 capital (to average assets)
	Customers Bancorp, Inc.	$	262,719		9.3	%	$	112,939		4	%		N/A		N/A
	Customers Bank	$	218,394		7.74	%	$	112,896		4	%	$	141,120		5	%

Disclosures_about_Fair_Value_o

Disclosures about Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Disclosures about Fair Value of Financial Instruments	'
	NOTE 13 — DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS
	The Bancorp uses fair value measurements to record fair value adjustments to certain assets and to disclose the fair value of its financial instruments. FASB ASC 825, Financial Instruments, requires disclosure of the estimated fair value of an entity’s assets and liabilities considered to be financial instruments. For the Bancorp, as for most financial institutions, the majority of its assets and liabilities are considered to be financial instruments. However, many of such instruments lack an available trading market as characterized by a willing buyer and willing seller engaging in an exchange transaction. For fair value disclosure purposes, the Bancorp utilized certain fair value measurement criteria under the FASB ASC 820, Fair Value Measurement, as explained below.
	Cash and cash equivalents:
	The carrying amounts reported in the balance sheet for cash and short-term instruments approximate these assets’ fair values. These assets are included as Level 1 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Investment Securities:
	The fair value of investment securities available for sale and held to maturity are determined by obtaining quoted market prices on nationally recognized 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 included as Level 1 and 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	The carrying amount of FHLB, Federal Reserve Bank and other stock approximates fair value, and considers the limited marketability of such securities. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Loans held for sale:
	The fair value of loans receivable held for sale is based on commitments on hand from investors within the secondary market for loans with similar characteristics. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Loans held for sale — Mortgage warehouse loans:
	The Fair Value Option
	The Bancorp elected the fair value option for warehouse lending transactions documented under a Master Repurchase Agreement originated after July 1, 2012 in order to more accurately represent the short-term nature of the transaction and its inherent credit risk. This adoption was in accordance with the parameters established by Accounting Standards Codification (“ASC”) 825-10-25, Financial Instruments-Overall-Recognition: The Fair Value Option. Warehouse lending transactions are classified as “Loans held for sale” on the balance sheet. The interest income from the warehouse lending transactions is classified in “Interest Income — Loans held for sale on the income statement. An allowance for loan losses is not recorded for the warehouse lending transactions when measured at fair value since the exit price (the repurchase price) for warehouse lending transactions considers the effect of expected credit losses.
	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 the mortgage company 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 since at inception of the transaction the underlying loans have already been sold to an approved investor or they have been hedged by the mortgage company. Additionally, the interest rate is variable, and the transaction is short-term, with an average life of 17 days from purchase to sale. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Loans receivable, net:
	The fair values of loans are estimated using discounted cash flow analyses, using market rates at the balance sheet date that reflect the credit and interest rate-risk inherent in the loans. Projected future cash flows are calculated based upon contractual maturity or call dates, projected repayments and prepayments of principal. Generally, for variable rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. These assets are included as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Impaired loans:
	Impaired loans are those that are accounted for under FASB ASC 450, Contingencies, in which the Bancorp has measured impairment generally based on the fair value of the loan’s collateral. Fair value is generally determined based upon independent third-party appraisals of the properties, or discounted cash flows based upon the expected proceeds. These assets are included as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	FDIC loss sharing receivable:
	The FDIC loss sharing receivable is measured separately from the related covered assets, as it is not contractually embedded in the assets and is not transferable with the assets should the assets be sold. Fair value is estimated using projected cash flows related to the loss sharing agreements based on the expected reimbursements for losses using the applicable loss share percentages and the estimated true-up payment. These cash flows are discounted to reflect the estimated timing of the receipt of the loss share reimbursement from the FDIC. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Other real estate owned:
	The fair value of OREO is determined using appraisals, which may be discounted based on management’s review and changes in market conditions (Level 3 Inputs). All appraisals must be performed in accordance with the Uniform Standards of Professional Appraisal Practice (“USPAP”). Appraisals are certified to the Bancorp and performed by appraisers on the Bancorp’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 included as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Accrued interest receivable and payable:
	The carrying amount of accrued interest receivable and accrued interest payable approximates its fair value. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Deposit liabilities:
	The fair values disclosed for deposits (e.g., interest and noninterest checking, passbook savings and money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered in the market on certificates to a schedule of aggregated expected monthly maturities on time deposits. These assets are included as Level 1 and 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Federal funds purchased:
	For these short-term instruments, the carrying amount is considered a reasonable estimate of fair value. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Other Borrowings:
	The carrying amount of short-term FHLB borrowings approximates its fair value. Fair values of long-term FHLB advances are estimated using discounted cash flow analysis, based on quoted prices for new FHLB advances with similar credit risk characteristics, terms and remaining maturity. These prices obtained from this active market represent a market value that is deemed to represent the transfer price if the liability were assumed by a third party. Also included in Other Borrowings is long-term senior debt the fair value of which is determined using discounted cash flow analysis. Long-term senior debit is included in Level 3. These liabilities are included as Level 2 and 3 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Subordinated debt:
	Fair values of subordinated debt are estimated using discounted cash flow analysis, based on market rates currently offered on such debt with similar credit risk characteristics, terms and remaining maturity. These assets are included 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 are determined using models that incorporate readily observable market data into a market standard methodology. The methodology nets the discounted future fixed cash receipts and the discounted expected variable cash payments. The discounted variable cash 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 Bancorp and its counterparties. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
	Off-balance-sheet financial instruments:
	Fair values for the Bancorp’s off-balance-sheet financial instruments (lending commitments and letters of credit) are based on fees currently charged in the market to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing. These assets are included as Level 2 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 the fair value of the entire Bancorp since a fair value calculation is only provided for a limited portion of the Bancorp’s assets. Due to a wide range of valuation techniques and the degree of subjectivity used in making the estimates, comparisons between the Bancorp’s disclosures and those of other companies may not be meaningful.
	The estimated fair values of the Bancorp’s financial instruments were as follows at September 30, 2013 and December 31, 2012.
									Fair Value Measurements at September 30, 2013
			Carrying			Estimated			Quoted			Significant		Significant
			Amount			Fair Value			Prices in			Other		Unobservable
									Active			Observable		Inputs
									Markets for			Inputs		(Level 3)
									Identical			(Level 2)
									Assets
									(Level 1)
			(dollars in thousands)
	Assets:
	Cash and cash equivalents		$	255,653		$	255,653		$	255,653		$	0	$	0
	Investment securities, available for sale			497,566			497,566			22,905			474,661		0
	Loans held for sale			917,939			917,939			0			917,939		0
	Loans receivable, net			2,072,987			2,088,789			0			0		2,088,789
	FHLB, Federal Reserve Bank and other stock			19,113			19,113			0			19,113		0
	FDIC loss sharing receivable			11,038			11,038			0			11,038		0
	Derivatives not designated as hedging instruments			1,911			1,911			0			1,911		0
	Fraudulent loans receivable (1)			669			669			0			0		669
	Accrued interest receivable			7,866			7,866			7,866			0		0
	Liabilities:
	Deposits		$	3,243,312		$	3,247,129		$	671,211		$	2,575,918	$	0
	Other borrowings			235,250			238,251			0			238,251		0
	Subordinated debt			2,000			2,000			0			2,000		0
	Derivatives not designated as hedging instruments			1,871			1,871			0			1,871		0
	Accrued interest payable			1,761			1,761			1,761			0		0
	-1	Included in Other Assets
								Fair Value Measurements at December 31, 2012
		Carrying			Estimated			Quoted			Significant		Significant
		Amount			Fair Value			Prices in			Other		Unobservable
								Active			Observable		Inputs
								Markets for			Inputs		(Level 3)
								Identical			(Level 2)
								Assets
								(Level 1)
		(dollars in thousands)
Assets:
Cash and cash equivalents		$	186,016		$	186,016		$	186,016		$	0	$	0
Investment securities, available for sale			129,093			129,093			6			129,087		0
Loans held for sale			1,439,889			1,439,889			0			1,439,889		0
Loans receivable, net			1,298,630			1,307,049			0			0		1,307,049
FHLB, Federal Reserve Bank and other stock			30,163			30,163			0			30,163		0
FDIC loss sharing receivable			12,343			12,343			0			12,343		0
Accrued interest receivable			5,790			5,790			5,790			0		0
Liabilities:
Deposits		$	2,440,818		$	2,674,765		$	219,687		$	2,455,078	$	0
Federal funds purchased			5,000			5,000			5,000			0		0
Other borrowings			471,000			471,432			0			471,432		0
Subordinated debt			2,000			2,000			0			2,000		0
Accrued interest payable			1,530			1,530			1,530			0		0
In accordance with FASB ASC 820, Fair Value Measurements and Disclosures, 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 the Bancorp’s 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.
Level 1:		Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
Level 2:		Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability.
Level 3:		Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity).
An asset’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at September 30, 2013 and December 31, 2012 were as follows:
		September 30, 2013
		Fair Value Measurements at the End of the Reporting Period Using
		Quoted Prices in			Significant Other			Significant			Total
		Active Markets for			Observable Inputs			Unobservable
		Identical Assets			(Level 2)			Inputs
		(Level 1)						(Level 3)
		(dollars in thousands)
Measured at Fair Value on a Recurring Basis:
Assets
Available-for-sale securities:
Mortgage-backed securities		$	0		$	449,521		$	0		$	449,521
Corporate notes			0			25,140			0			25,140
Equity securities			22,905			0			0			22,905
Derivatives not designated as hedging instruments (1)			0			1,911			0			1,911
Mortgage warehouse loans held for sale			0			840,425			0			840,425
Total assets - recurring fair value measurements		$	22,905		$	1,316,997		$	0		$	1,339,902
Liabilities
Derivatives not designated as hedging instruments (2)		$	0		$	1,871		$	0		$	1,871
Measured at Fair Value on a Nonrecurring Basis:
Assets
Impaired loans, net of specific reserves of $3,750		$	0		$	0		$	7,850		$	7,850
Other real estate owned			0			0			10,259			10,259
Total assets - nonrecurring fair value measurements		$	0		$	0		$	18,109		$	18,109
-1	Included in Other Assets
-2	Included in Other Liabilities
		December 31, 2012
		Fair Value Measurements at the End of the Reporting Period Using
		Quoted Prices in			Significant Other			Significant			Total
		Active Markets for			Observable Inputs			Unobservable
		Identical Assets			(Level 2)			Inputs
		(Level 1)						(Level 3)
		(dollars in thousands)
Measured at Fair Value on a Recurring Basis:
Assets
Available-for-sale securities:
Mortgage-backed securities		$	0		$	104,135		$	0		$	104,135
Corporate notes			0			24,952			0			24,952
Equity securities			6			0			0			6
Mortgage warehouse loans held for sale			0			1,248,935			0			1,248,935
Total assets - recurring fair value measurements		$	6		$	1,378,022		$	0		$	1,378,028
Measured at Fair Value on a Nonrecurring Basis:
Assets
Impaired loans, net of specific reserves of $4,625		$	0		$	0		$	11,004		$	11,004
Other real estate owned			0			0			5,737			5,737
Total assets - nonrecurring fair value measurements		$	0		$	0		$	16,741		$	16,741
The changes in Level 3 assets measured at fair value on a recurring basis for the three months ended September 30, 2013 and 2012 are summarized as follows.
There were no Level 3 assets or liabilities measured at fair value on a recurring basis during the three months ended September 30, 2013.
		Mortgage-			Corporate			Total
		backed			Notes
		Securities
		(dollars in thousands)
Balance at July 1, 2012		$	2,632		$	24,203		$	26,835
Total gains included in other comprehensive income (before taxes)			0			469			469
Amortization included in interest income			(29	)		0			(29	)
Settlements			(2,603	)		0			(2,603	)
Balance at September 30, 2012		$	0		$	24,672		$	24,672
The changes in Level 3 assets measured at fair value on a recurring basis for the nine months ended September 30, 2013 and 2012 are summarized as follows.
		Loans
		Held for
		Sale (1)
		(dollars in thousands)
Balance at January 1, 2013		$	0
Transfer from Level 2 to Level 3 (1)			3,173
Recoveries			(1,463	)
Sales			(1,013	)
Transfer from loans held for sale to other assets (1)			(697	)
Balance at September 30, 2013		$	0
		Mortgage-			Corporate			Total
		backed			Notes
		Securities
		(dollars in thousands)
Balance at January 1, 2012		$	2,894		$	19,217		$	22,111
Total gains included in other comprehensive income (before taxes)			0			455			455
Amortization included in interest income			(291	)		0			(291	)
Settlements			(2,603	)		0			(2,603	)
Purchases			0			5,000			5,000
Balance at September 30, 2012		$	0		$	24,672		$	24,672
-1	The Bancorp’s policy is to recognize transfers between levels when events or circumstances warrant transfers. During the first quarter of 2013, a suspected fraud was discovered in the Bank’s loans held-for-sale portfolio. Total loans involved in this fraud initially appeared to be $5.2 million, and management believed the range of possible loss to have been between $1.5 million and $3.2 million. Accordingly, management provided a loss contingency of $2.0 million at March 31, 2013. Due to the uncertainty surrounding the amount of loss, management transferred these loans and the related loss contingency from Level 2 to Level 3. During the second quarter of 2013, the Bank determined that an aggregate of $1.0 million of the loans were not involved in the fraud, and these loans were subsequently sold. In addition, the Bank recovered $1.5 million in cash from the alleged perpetrator. Since it was resolved that the loans no longer met the definition of “a loan,” and since the Bank is pursuing restitution through the involved parties, the Bank determined this to be a receivable. As a result, the remaining aggregate of $2.7 million of loans and the related $2.0 million reserve were transferred to Other assets.
The following table summarizes financial assets and financial liabilities measured at fair value as of September 30, 2013 on a recurring and nonrecurring basis for which the Bancorp utilized Level 3 inputs to measure fair value. The valuation techniques, unobservable inputs, and ranges (weighted average) are the same as those disclosed at December 31, 2012.
		Quantitative Information about Level 3 Fair Value Measurements
September 30, 2013		Fair Value			Valuation Technique		Unobservable Input	Range (Weighted
		Estimate						Average) (3)
		(dollars in thousands)
Impaired loans		$	7,850		Collateral appraisal (1)		Liquidation expenses (2)	-3% to -8% (-5.5%)
Other real estate owned		$	10,259		Collateral appraisal (1)		Liquidation expenses (2)	-3% to -8% (-5.5%)
-1	Obtained from independent third-parties approved appraisers. Appraisals are current and in compliance with credit policy. The Bancorp does not discount appraisals.
-2	Fair value is adjusted for costs to sell.
-3	Presented as a percentage of the value determined by appraisal.

Derivative_Instruments_and_Hed

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities	'
	NOTE 14 — DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
	Accounting Policy for Derivative Instruments and Hedging Activities
	The Bancorp records all derivatives on the balance sheet at fair value. Currently, none of the derivatives are designated in qualifying hedging relationships. As such, all changes in fair value of the derivatives are recognized directly in earnings.
	In accordance with U.S. GAAP, the Bancorp made an accounting policy election to measure credit risk of its derivative financial instruments that are subject to master netting agreements on a gross basis.
	Risk Management Objectives of Using Derivatives
	The Bancorp is exposed to certain risks arising from both its business operations and economic conditions. The Bancorp manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and durations of its assets and liabilities. The Bank’s existing interest-rate derivatives result from a service provided to certain qualifying customers, and therefore, are not used to manage interest-rate risk in assets or liabilities. The Bank manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions.
	Derivatives Not Designated as Hedging Instruments
	None of the Bancorp’s derivatives are designated in qualifying hedging relationships. The derivatives not designated as hedges are not speculative and result from a service implemented in the first quarter of 2013 that the Bank provides to certain customers. The Bank 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 to fixed rate loan). The customer interest rate swaps are simultaneously offset by interest rate swaps that the Bank executes with a third party in order to minimize risk exposure resulting from such transactions. Since 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 market swaps are recognized directly in earnings. At September 30, 2013, the Bancorp had 16 interest rate swaps with an aggregate notional amount of $99.9 million related to this program.
	Fair Value of Derivative Instruments on the Balance Sheet
	The following table presents the fair value of the Bancorp’s derivative financial instruments as well as the classification on the balance sheet.
		Fair Value of Derivative Instruments
		30-Sep-13
		Asset Derivatives			Liability Derivatives
		Balance sheet	Fair value		Balance sheet	Fair value
		location			location
		(dollars in thousands)
	Derivatives not designated as hedging instruments
	Interest rate swap products	Other assets	$	1,911	Other liabilities	$	1,871
	Effect of Derivative Instruments on Comprehensive Income
	The following table presents the effect of the Bancorp’s derivative financial instruments on comprehensive income for the three and nine months ended September 30, 2013.
		Effect of Derivative Instruments on Comprehensive Income
		Three Months Ended September 30, 2013
		Location of loss	Amount of loss
		recognized in income	recognized in income
		on derivatives	on derivatives
		(dollars in thousands)
	Derivatives not designated as hedging instruments
	Interest rate swap products	Other non-interest income	$	38
		Effect of Derivative Instruments on Comprehensive Income
		Nine Months Ended September 30, 2013
		Location of gain	Amount of gain
		recognized in income	recognized in income
		on derivatives	on derivatives
		(dollars in thousands)
	Derivatives not designated as hedging instruments
	Interest rate swap products	Other non-interest income	$	236
	Credit-risk-related Contingent Features
	By entering into derivative contracts, the Bank is exposed to credit risk. The credit risk associated with derivatives executed with Bank 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, the Bancorp only enters into agreements with those that maintain credit ratings of high quality.
	Agreements with major derivative dealer counterparties contain provisions whereby default on any of the Bancorp’s indebtedness would be considered a default on its derivative obligations. The Bancorp also has entered into agreements that contain provisions under which the counterparty could require the Bancorp to settle its obligations if the Bancorp fails to maintain its status as a well/adequately-capitalized institution. As of September 30, 2013, the termination value of derivatives in a net liability position (which includes accrued interest but excludes any adjustment for nonperformance-risk) related to these agreements was $1.8 million. In addition, the Bancorp has minimum collateral posting thresholds with certain of these counterparties, and at September 30, 2013 had posted $2.2 million as collateral.

Disclosures_about_Offsetting_A

Disclosures about Offsetting Assets and Liabilities

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

'

Disclosures about Offsetting Assets and Liabilities

'

NOTE 15 — DISCLOSURES ABOUT OFFSETTING ASSETS AND LIABILITIES

The following tables present derivative instruments that are subject to enforceable master netting arrangements. The Bancorp has not made a policy election to offset its derivative positions.

Offsetting of Financial Assets and Derivative Assets

For the Nine Months Ended September 30, 2013

Gross amounts not offset in

the consolidated balance sheet

Gross amount of

Gross amounts

Net amounts of

Financial

Cash collateral

Net amount

recognized assets

offset in the

assets presented

instruments

received

consolidated

in the consolidated

balance sheet

balance sheet

(dollars in thousands)

Description

Interest rate swap derivatives with institutional counterparties

$

177

$

0

$

177

$

177

$

0

$

0

Offsetting of Financial Liabilities and Derivative Liabilities

For the Nine Months Ended September 30, 2013

Gross amounts not offset in

the consolidated balance sheet

Gross amount of

Gross amounts

Net amounts of

Financial

Cash collateral

Net amount

recognized liabilities

offset in the

liabilities presented

instruments

pledged

consolidated

in the consolidated

balance sheet

balance sheet

(dollars in thousands)

Description

Interest rate swap derivatives with institutional counterparties

$

1,746

$

0

$

1,746

$

177

$

1,569

$

0

Loss_Contingency

Loss Contingency	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Loss Contingency	'
	NOTE 16 — LOSS CONTINGENCY
	During the first quarter of 2013, a suspected fraud was discovered in the Bank’s loans held-for-sale portfolio. Total loans involved in this fraud initially appeared to be $5.2 million, and management believed the range of possible loss to have been between $1.5 million and $3.2 million. Accordingly, management provided a loss contingency of $2.0 million at March 31, 2013. During the second quarter of 2013, the Bank determined that an aggregate of $1.0 million of the loans were not involved in the fraud, and these loans were subsequently sold. In addition, the Bank recovered $1.5 million in cash from the alleged perpetrator. Since it was resolved that the loans no longer met the definition of “a loan,” and since the Bank is pursuing restitution through the involved parties, the Bank determined this to be a receivable. As a result, the remaining aggregate of $2.7 million of loans and the related $2.0 million reserve were transferred to Other assets.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Determination of Appropriate Accounting Treatment for Purchased Loans Policy	'
	Purchased Loans
	The Bancorp believes that the varying circumstances under which it purchases loans and the diverse quality of loans purchased should drive the decision as to whether loans in a portfolio should be deemed to be purchased-credit-impaired loans (“PCI” loans). Therefore, loan acquisitions are and will be evaluated on a case-by-case basis to determine the appropriate accounting treatment. Loans acquired that do not have evidence of credit deterioration at the purchase date are and will be accounted for in accordance with ASC 310-20, Nonrefundable Fees and Other Costs, and loans acquired with evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected are and will be accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality.
	Loans that are purchased that do not have evidence of credit deterioration
	Purchased performing loans are recorded at fair value and include credit and interest rate marks associated with acquisition accounting adjustments, as accounted for under the contractual cash flow method of accounting. The fair value adjustment is accreted as an adjustment to yield over the estimated contractual lives of the loans. There is no allowance for loan losses established at the acquisition date for the acquired performing loans. A provision for loan losses is recorded for any credit deterioration in these loans subsequent to acquisition.
	Loans that are purchased that have evidence of credit deterioration since origination and for which it is probable that all contractually required payments will not be collected
	For purchases of this type of loan, evidence of deteriorated credit quality may include past-due and non-accrual status, borrower credit scores and recent loan-to-value percentages.
	The fair value of loans with evidence of credit deterioration is recorded net of a nonaccretable difference and accretable yield. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is the nonaccretable difference, which is not included in the carrying amount of acquired loans. Subsequent to acquisition, estimates of cash flows expected to be collected are updated each reporting period based on updated assumptions regarding default rates, loss severities, and other factors that are reflective of current market conditions. Subsequent decreases to the expected cash flows will generally result in a provision for loan losses. Subsequent increases in cash flows result in a reversal of the provision for loan losses to the extent of prior charges, or a reclassification of the difference from nonaccretable to accretable with a positive impact on accretion of interest income in future periods. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized in interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of those cash flows.
	Purchased-credit-impaired loans acquired in the same fiscal quarter may be aggregated into one or more pools, provided that the loans have common risk characteristics. A pool is then accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. On a quarterly basis, the Bank re-estimates the total cash flows (both principal and interest) expected to be collected over the remaining life of each pool. These estimates incorporate assumptions regarding default rates, loss severities, the amounts and timing of prepayments and other factors that reflect then-current market conditions. If the timing and/or amounts of expected cash flows on purchased-credit-impaired loans were determined not to be reasonably estimable, no interest would be accreted and the loans would be reported as non-accrual loans; however, when the timing and amounts of expected cash flows for purchased-credit-impaired loans are reasonably estimable, interest is being accreted and the loans are being reported as performing loans.
Recently Issued Accounting Standards	'
	Recently Issued Accounting Standards
	In January, 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, to clarify that the scope of ASU 2011-11 applies to derivatives accounted for in accordance with Topic 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with relevant accounting guidance or subject to an enforceable master netting arrangement or similar agreement. The guidance in this ASU was effective for the first interim or annual period beginning on or after January 1, 2013 (the same effective date for ASU 2011-11) and is to be applied retrospectively. See “NOTE 15 — DISCLOSURES ABOUT OFFSETTING ASSETS AND LIABILITIES” for the required disclosures.
	In October, 2012, the FASB issued ASU 2012-06, Business Combinations (Topic 805): Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution (a consensus of the FASB Emerging Issues Task Force). This ASU requires an entity to subsequently account for the change in the measurement of the indemnification asset on the same basis as the change in the assets subject to indemnification. The amendments in this ASU were effective for the first interim periods or annual period beginning on or after December 15, 2012 and are to be applied prospectively. Adoption of this ASU has not had a significant impact on the Bancorp’s results of operations or financial position.
	In February, 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which adds new disclosure requirements for items reclassified out of accumulated other comprehensive income (“AOCI”). The ASU requires entities to disclose additional information about reclassification adjustments, including (1) changes in accumulated other comprehensive income balances by component and (2) significant items reclassified out of AOCI. The new disclosure requirements were effective for fiscal years and interim periods beginning after December 15, 2012 for public companies. See “NOTE 4 — CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME BY COMPONENT” for the required disclosures.
Financial Instruments	'
	The Fair Value Option
	The Bancorp elected the fair value option for warehouse lending transactions documented under a Master Repurchase Agreement originated after July 1, 2012 in order to more accurately represent the short-term nature of the transaction and its inherent credit risk. This adoption was in accordance with the parameters established by Accounting Standards Codification (“ASC”) 825-10-25, Financial Instruments-Overall-Recognition: The Fair Value Option. Warehouse lending transactions are classified as “Loans held for sale” on the balance sheet. The interest income from the warehouse lending transactions is classified in “Interest Income — Loans held for sale on the income statement. An allowance for loan losses is not recorded for the warehouse lending transactions when measured at fair value since the exit price (the repurchase price) for warehouse lending transactions considers the effect of expected credit losses.
	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 the mortgage company 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 since at inception of the transaction the underlying loans have already been sold to an approved investor or they have been hedged by the mortgage company. Additionally, the interest rate is variable, and the transaction is short-term, with an average life of 17 days from purchase to sale. These assets are included as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements.
Impaired Loans	'
	Impaired loans:
	Impaired loans are those that are accounted for under FASB ASC 450, Contingencies, in which the Bancorp has measured impairment generally based on the fair value of the loan’s collateral. Fair value is generally determined based upon independent third-party appraisals of the properties, or discounted cash flows based upon the expected proceeds. These assets are included as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements.
Fair Value Measurement	'
	In accordance with FASB ASC 820, Fair Value Measurements and Disclosures, 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 the Bancorp’s 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.

Changes_in_Accumulated_Other_C1

Changes in Accumulated Other Comprehensive Income by Component (Tables)	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Changes in Accumulated Other Comprehensive Income	'
		Unrealized				Foreign			Total
		Gains and				Currency
		Losses on				Items
		Available-
		for-Sale
		Securities
			(dollars in thousands)
	Beginning Balance - July 1, 2013		$	(3,530	)		$	0		$	(3,530	)
	Other comprehensive loss before reclassifications			(8	)			1			(7	)
	Amounts reclassified from accumulated other comprehensive loss			0				0			0
	Net current-period other comprehensive (loss) income			(8	)			1			(7	)
	Ending balance - September 30, 2013		$	(3,538	)		$	1		$	(3,537	)
			Unrealized				Foreign			Total
			Gains and				Currency
			Losses on				Items
			Available-
			for-Sale
			Securities
	Beginning Balance - January 1, 2013		$	1,064			$	0		$	1,064
	Other comprehensive loss before reclassifications			(4,602	)			1			(4,601	)
	Amounts reclassified from accumulated other comprehensive loss			0				0			0
	Net current-period other comprehensive (loss) income			(4,602	)			1			(4,601	)
	Ending balance - September 30, 2013		$	(3,538	)		$	1		$	(3,537	)
	(a)	All amounts are net of tax. Amounts in parentheses indicate debits.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Components of Earnings Per Share	'
	The following are the components and results of the Bancorp’s earnings per share calculation for the periods presented:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
		(dollars in thousands, except per share data)
	Net income allocated to common shareholders	$	8,268	$	6,636	$	23,683	$	16,252
	Weighted-average number of common shares - basic		24,678,317		12,465,744		21,494,880		11,723,090
	Share-based compensation plans		475,987		310, 845		383,326		231,674
	Warrants		182,898		134,926		175,999		112,265
	Weighted-average number of common shares - diluted		25,337,202		12,911,515		22,054,205		12,067,029
	Basic earnings per share	$	0.34	$	0.53	$	1.1	$	1.39
	Diluted earnings per share	$	0.33	$	0.51	$	1.07	$	1.35
Anti-dilutive Securities Excluded from Computation of Earnings Per Share	'
	The following is a summary of securities that could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the periods presented:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Weighted-average anti-dilutive securities:
	Share-based compensation awards		92,245		6,592		87,129		6,592
	Warrants		118,745		129,946		118,745		129,946
	Total anti-dilutive securities		210,990		136,538		205,874		136,538

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2013
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 September 30, 2013 and December 31, 2012 are summarized as follows:
			September 30, 2013
			Amortized		Gross		Gross		Fair Value
			Cost		Unrealized		Unrealized
					Gains		Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities (1)		$	454,933	$	1,410	$	6,822	$	449,521
	Corporate notes			25,000		163		23		25,140
	Equity securities			23,074		81		250		22,905
			$	503,007	$	1,654	$	7,095	$	497,566
	-1	Includes private-label securities with an aggregate amortized cost of $521 and an aggregate fair value of $513.
			December 31, 2012
			Amortized		Gross		Gross		Fair Value
			Cost		Unrealized		Unrealized
					Gains		Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities (1)		$	102,449	$	1,795	$	109	$	104,135
	Corporate notes			25,000		89		137		24,952
	Equity securities			6		0		0		6
			$	127,455	$	1,884	$	246	$	129,093
	-1	Includes private-label securities with an aggregate amortized cost of $629 and an aggregate fair value of $612.
Statement of Proceeds from Sale of Available for Sale Investment Securities	'
	The following table shows proceeds from the sale of available-for-sale investment securities and gross gains and gross losses realized on those sales for the three and nine months ended September 30, 2013 and 2012:
			Three months ended September 30,				Nine months ended September 30,
			2013		2012		2013		2012
			(dollars in thousands)
	Proceeds from sale of available-for-sale securities		$	0	$	0	$	0	$	306,610
	Gross gains		$	0	$	0	$	0	$	9,006
	Gross losses			0		0		0		0
	Net gains		$	0	$	0	$	0	$	9,006
	These gains and losses were determined using the specific identification method and were included in non-interest income.
Summary of Investments Available for Sale Debt Securities by Stated Maturity	'
	The following table shows available-for-sale debt securities by stated maturity. Debt securities backed by mortgages have expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and are, therefore, classified separately with no specific maturity date:
			September 30, 2013
			Amortized		Fair
			Cost		Value
			(dollars in thousands)
	Due in one year or less		$	0	$	0
	Due after one year through five years			25,000		25,140
	Due after five years through ten years			0		0
	Due after ten years			0		0
	Mortgage-backed securities			454,933		449,521
	Total debt securities		$	479,933	$	474,661
Gross Unrealized Losses and Fair Value, Aggregated by Investment Category	'
	The Bancorp’s investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2013 and December 31, 2012 were as follows:
			September 30, 2013
			Less Than 12 Months				12 Months or More				Total
			Fair Value		Unrealized		Fair Value		Unrealized		Fair Value		Unrealized
					Losses				Losses				Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities		$	129,120	$	6,811	$	309	$	11	$	129,429	$	6,822
	Corporate notes			4,980		20		4,997		3		9,977		23
	Equity securities			22,068		250		0		0		22,068		250
	Total		$	156,168	$	7,081	$	5,306	$	14	$	161,474	$	7,095
			December 31, 2012
			Less Than 12 Months				12 Months or More				Total
			Fair Value		Unrealized		Fair Value		Unrealized		Fair Value		Unrealized
					Losses				Losses				Losses
			(dollars in thousands)
	Available for Sale:
	Mortgage-backed securities		$	5,695	$	87	$	429	$	22		6,124	$	109
	Corporate notes			0		0		9,862		137		9,862		137
	Total		$	5,695	$	87	$	10,291	$	159	$	15,986	$	246

Loans_Receivable_and_Allowance1

Loans Receivable and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Composition of Net Loans Receivable	'
	The composition of net loans receivable was as follows:
			September 30,			December 31,
			2013			2012
			(dollars in thousands)
	Construction		$	22,192		$	27,792
	Commercial real estate			29,623			44,901
	Commercial and industrial			6,826			11,153
	Residential real estate			19,233			19,952
	Manufactured housing			3,381			3,728
	Total loans receivable covered under FDIC loss sharing agreements (1)			81,255			107,526
	Construction			34,674			28,897
	Commercial real estate			1,490,930			835,488
	Commercial and industrial			213,794			75,118
	Mortgage warehouse			1,006			9,565
	Manufactured housing			142,677			154,703
	Residential real estate			133,503			109,430
	Consumer			1,889			2,061
	Total loans receivable not covered under FDIC loss sharing agreements			2,018,473			1,215,262
	Total loans receivable (2)			2,099,728			1,322,788
	Deferred (fees) costs, net			59			1,679
	Allowance for loan losses			(26,800	)		(25,837	)
	Loans receivable, net		$	2,072,987		$	1,298,630
	-1	Loans that were acquired in two FDIC-assisted transactions and are covered under loss sharing agreements with the FDIC are referred to as “covered” loans throughout these financial statements.
	-2	Customers Bank takes advantage of Federal Home Loan Bank (“FHLB”) programs for overnight and term borrowings. Under the terms of a blanket collateral agreement, advances from the FHLB are collateralized by qualifying first-mortgage loans.
Non-Covered Loans and Covered Loans, by Class	'
	Non-Covered Nonaccrual Loans and Loans Past Due
	The following tables summarize non-covered loans, by class:
			September 30, 2013
			30-89 Days			Greater			Total Past			Non-			Current (2)			PCI			Total
			Past Due (1)			Than			Due (1)			Accrual						Loans (5)			Loans (4)
						90 Days (1)
			(dollars in thousands)
	Commercial and industrial		$	0		$	0		$	0		$	221		$	211,404		$	2,169		$	213,794
	Commercial real estate			0			0			0			10,625			1,442,061			38,244			1,490,930
	Construction			0			0			0			2,050			31,683			941			34,674
	Residential real estate			400			0			400			945			121,550			10,608			133,503
	Consumer			0			0			0			0			1,469			420			1,889
	Mortgage warehouse			0			0			0			0			1,006			0			1,006
	Manufactured housing (3)			6,311			3,095			9,406			1,101			126,981			5,189			142,677
	Total		$	6,711		$	3,095		$	9,806		$	14,942		$	1,936,154		$	57,571		$	2,018,473
			December 31, 2012
			30-89 Days			Greater			Total Past			Non-			Current (2)			PCI			Total
			Past Due (1)			Than			Due (1)			Accrual						Loans (5)			Loans (4)
						90 Days (1)
			(dollars in thousands)
	Commercial and industrial		$	38		$	0		$	38		$	288		$	72,715		$	2,077		$	75,118
	Commercial real estate			1,437			0			1,437			17,770			770,508			45,773			835,488
	Construction			0			0			0			2,423			25,022			1,452			28,897
	Residential real estate			381			0			381			1,669			95,396			11,984			109,430
	Consumer			0			0			0			56			1,486			519			2,061
	Mortgage warehouse			0			0			0			0			9,565			0			9,565
	Manufactured housing (3)			9,234			1,966			11,200			141			135,924			7,438			154,703
	Total		$	11,090		$	1,966		$	13,056		$	22,347		$	1,110,616		$	69,243		$	1,215,262
	-1	Loan balances do not include non-accrual loans.
	-2	Loans where payments are due within 29 days of the scheduled payment date.
	-3	Purchased manufactured housing loans, purchased in 2010, are subject to cash reserves held at the Bank that are used to fund the past-due payments when the loan becomes 90-days or more delinquent.
	-4	Loans exclude deferred costs and fees.
	-5	Purchased-credit-impaired loans that were aggregated into pools are accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows, the past due status of the pools, or that of the individual loans within the pools, is not meaningful. Because we recognize interest income on each pool of loans, they are all considered to be performing. PCI loans that are not in pools accrete interest when the timing and amount of their expected cash flows are reasonably estimable, and being reported as performing loans.
	Covered Nonaccrual Loans and Loans Past Due
	The following tables summarize covered loans, by class:
			September 30, 2013
			30-89 Days			Greater Than			Total Past			Non-			Current			PCI			Total
			Past Due (1)			90 Days			Due (1)			Accrual			(2)(3)			Loans (5)			Loans (4)
						Past Due (1)
			(dollars in thousands)
	Commercial and industrial		$	0		$	0		$	0		$	0		$	4,394		$	2,432		$	6,826
	Commercial real estate			0			0			0			1,821			17,413			10,389			29,623
	Construction			0			0			0			3,382			5,920			12,890			22,192
	Residential real estate			0			0			0			564			14,328			4,341			19,233
	Manufactured housing			86			0			86			21			3,138			136			3,381
	Total		$	86		$	0		$	86		$	5,788		$	45,193		$	30,188		$	81,255
			December 31, 2012
			30-89 Days			Greater Than			Total Past			Non-			Current			PCI			Total
			Past Due (1)			90 Days			Due (1)			Accrual			(2)(3)			Loans (5)			Loans (4)
						Past Due (1)
			(dollars in thousands)
	Commercial and industrial		$	220		$	0		$	220		$	100		$	8,404		$	2,429		$	11,153
	Commercial real estate			0			0			0			3,712			20,859			20,330			44,901
	Construction			0			0			0			5,244			6,472			16,076			27,792
	Residential real estate			0			0			0			1,358			14,226			4,368			19,952
	Manufactured housing			48			0			48			90			3,527			63			3,728
	Total		$	268		$	0		$	268		$	10,504		$	53,488		$	43,266		$	107,526
	-1	Loans balances do not include nonaccrual loans.
	-2	Loans receivable that were not identified upon acquisition as a loan with credit deterioration.
	-3	Loans where payments are due within 29 days of the scheduled payment date.
	-4	Loans exclude deferred costs and fees.
	-5	Purchased-credit-impaired loans that were aggregated into pools are accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows, the past due status of the pools, or that of the individual loans within the pools, is not meaningful. Because we recognize interest income on each pool of loans, they are all considered to be performing. PCI loans that are not in pools accrete interest when the timing and amount of their expected cash flows are reasonably estimable, and being reported as performing loans.
Summary of Impaired Loans	'
	The following table presents a summary of impaired loans:
			September 30, 2013									For the Nine Months Ended
												September 30, 2013
			Recorded			Unpaid			Related			Average			Interest
			Investment			Principal			Allowance			Recorded			Income
			Net of			Balance						Investment			Recognized
			Charge Offs
			(dollars in thousands)
	With no related allowance recorded:
	Commercial and industrial		$	16,829		$	16,891					$	6,697		$	362
	Commercial real estate			16,223			17,075						23,271			548
	Construction			2,830			4,100						6,545			14
	Consumer			21			21						133			0
	Residential real estate			2,827			2,827						2,791			36
	With an allowance recorded:
	Commercial and industrial			3,333			4,603		$	961			1,192			157
	Commercial real estate			6,687			7,637			2,233			7,919			169
	Construction			1,148			1,148			368			5,544			46
	Consumer			54			54			1			46			4
	Residential real estate			378			378			187			953			2
	Total		$	50,330		$	54,734		$	3,750		$	55,091		$	1,338
			December 31, 2012									For the Nine Months Ended
												September 30, 2012
			Recorded			Unpaid			Related			Average			Interest
			Investment			Principal			Allowance			Recorded			Income
			Net of			Balance						Investment			Recognized
			Charge Offs
			(dollars in thousands)
	With no related allowance recorded:
	Commercial and industrial		$	3,844		$	3,844					$	5,191		$	160
	Commercial real estate			26,626			27,477						22,205			748
	Construction			6,588			6,618						7,627			19
	Consumer			101			101						105			3
	Residential real estate			3,188			3,188						2,382			55
	With an allowance recorded:
	Commercial and industrial			374			374		$	295			748			9
	Commercial real estate			8,708			10,022			2,505			9,071			205
	Construction			5,116			6,022			1,541			6,903			154
	Consumer			100			100			14			29			4
	Residential real estate			1,331			1,331			270			967			13
	Total		$	55,976		$	59,077		$	4,625		$	55,228		$	1,370
Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession	'
	The following is an analysis of loans modified in a troubled debt restructuring by type of concession for the three and nine months ended September 30, 2013 and 2012. There were no modifications that involved forgiveness of debt.
			TDRs in			TDRs in			Total
			Compliance			Compliance
			with Their			with Their
			Modified			Modified
			Terms and			Terms and
			Accruing			Not
			Interest			Accruing
						Interest
			(dollars in thousands)
	Three months ended September 30, 2013
	Extended under forbearance		$	0		$	0		$	0
	Multiple extensions resulting from financial difficulty			0			0			0
	Interest-rate reductions			0			12			12
	Total		$	0		$	12		$	12
	Nine months ended September 30, 2013
	Extended under forbearance		$	0		$	0		$	0
	Multiple extensions resulting from financial difficulty			0			0			0
	Interest-rate reductions			93			1,179			1,272
	Total		$	93		$	1,179		$	1,272
	Three months ended September 30, 2012
	Extended under forbearance		$	0		$	471		$	471
	Multiple extensions resulting from financial difficulty			0			0			0
	Interest-rate reductions			0			61			61
	Total		$	0		$	532		$	532
	Nine months ended September 30, 2012
	Extended under forbearance		$	0		$	471		$	471
	Multiple extensions resulting from financial difficulty			47			0			47
	Interest-rate reductions			268			61			329
	Total		$	315		$	532		$	847
Summary of Loans and Leases Modified in Troubled Debt Restructurings, and Recorded Investments and Unpaid Principal Balances	'
	The following table provides, by class, the number of loans modified in troubled debt restructurings and the recorded investments and unpaid principal balances during the three and nine months ended September 30, 2013 and 2012.
			TDRs in Compliance with Their						TDRs in
			Modified Terms and Accruing						Compliance
			Interest						with Their
									Modified
									Terms and Not
									Accruing Interest
			Number			Recorded			Number			Recorded
			of Loans			Investment			of Loans			Investment
			(dollars in thousands)
	Three months ended September 30, 2013
	Commercial and industrial			0		$	0			0		$	0
	Commercial real estate			0			0			0			0
	Construction			0			0			0			0
	Manufactured housing			0			0			1			12
	Residential real estate			0			0			0			0
	Consumer			0			0			0			0
	Total			0		$	0			1		$	12
	Nine months ended September 30, 2013
	Commercial and industrial			0		$	0			0		$	0
	Commercial real estate			0			0			0			0
	Construction			0			0			0			0
	Manufactured housing			2			60			11			1,179
	Residential real estate			0			0			0			0
	Consumer			1			33			0			0
	Total			3		$	93			11		$	1,179
	Three months ended September 30, 2012
	Commercial and industrial			0		$	0			0		$	0
	Commercial real estate			0			0			0			0
	Construction			0			0			0			0
	Manufactured housing			0			0			1			61
	Residential real estate			0			0			2			141
	Consumer			0			0			1			330
	Total			0		$	0			4		$	532
	Nine months ended September 30, 2012
	Commercial and industrial			0		$	0			0		$	0
	Commercial real estate			0			0			0			0
	Construction			0			0			0			0
	Manufactured housing			6			315			1			61
	Residential real estate			0			0			2			141
	Consumer			0			0			1			330
	Total			6		$	315			4		$	532
Credit Quality Tables for Covered and Non-Covered Loan Portfolio	'
	The following presents the credit quality tables as of September 30, 2013 and December 31, 2012 for the non-covered loan portfolio:
			September 30, 2013
			Commercial			Commercial			Construction			Residential
			and			Real Estate						Real Estate
			Industrial
			(dollars in thousands)
	Pass/Satisfactory		$	200,651		$	1,460,484		$	32,499		$	130,504
	Special Mention			12,861			16,200			88			1,380
	Substandard			282			14,246			2,087			1,619
	Doubtful			0			0			0			0
	Total		$	213,794		$	1,490,930		$	34,674		$	133,503
			Consumer			Mortgage			Manufactured
						Warehouse			Housing
			(dollars in thousands)
	Performing		$	1,889		$	1,006		$	141,576
	Nonperforming (1)			0			0			1,101
	Total		$	1,889		$	1,006		$	142,677
	-1	Includes loans that are on nonaccrual status at September 30, 2013.
			December 31, 2012
			Commercial			Commercial			Construction			Residential
			and			Real Estate						Real Estate
			Industrial
			(dollars in thousands)
	Pass/Satisfactory		$	70,955		$	794,187		$	26,020		$	105,490
	Special Mention			3,836			18,737			454			1,017
	Substandard			327			21,801			1,971			2,919
	Doubtful			0			763			452			4
	Total		$	75,118		$	835,488		$	28,897		$	109,430
			Consumer			Mortgage			Manufactured
						Warehouse			Housing
			(dollars in thousands)
	Performing		$	2,005		$	9,565		$	154,562
	Nonperforming (1)			56			0			141
	Total		$	2,061		$	9,565		$	154,703
	-1	Includes loans that are on nonaccrual status at December 31, 2012.
	The following presents the credit quality tables as of September 30, 2013 and December 31, 2012 for the covered loan portfolio:
			September 30, 2013
			Commercial			Commercial			Construction			Residential
			and			Real Estate						Real Estate
			Industrial
			(dollars in thousands)
	Pass/Satisfactory		$	4,730		$	17,920		$	1,972		$	14,245
	Special Mention			119			3,020			3,949			455
	Substandard			1,977			8,683			16,271			4,533
	Doubtful			0			0			0			0
	Total		$	6,826		$	29,623		$	22,192		$	19,233
			Manufactured
			Housing
			(dollars in thousands)
	Performing		$	3,274
	Nonperforming (1)			107
	Total		$	3,381
	-1	Includes loans that are on nonaccrual status at September 30, 2013.
			December 31, 2012
			Commercial			Commercial			Construction			Residential
			and			Real Estate						Real Estate
			Industrial
			(dollars in thousands)
	Pass/Satisfactory		$	8,888		$	26,195		$	2,434		$	14,021
	Special Mention			51			225			4,038			455
	Substandard			2,214			18,481			21,320			5,476
	Doubtful			0			0			0			0
	Total		$	11,153		$	44,901		$	27,792		$	19,952
		Manufactured
		Housing
		(dollars in thousands)
Performing		$	3,638
Nonperforming (1)			90
Total		$	3,728
-1	Includes loans that are on nonaccrual status at December 31, 2012.
Schedule of Allowance for Loan Losses	'
	The changes in the allowance for loan losses for the three and nine months ended September 30, 2013 and 2012 and the loans and allowance for loan losses by loan segment based on impairment evaluation method are as follows. Please read in conjunction with disclosures in the Bancorp’s 2012 Annual Report on Form 10-K.
			Commercial			Commercial			Construction			Residential			Manufactured			Consumer			Mortgage			Residual			Total
			and			Real Estate						Real Estate			Housing (1)						Warehouse			Reserve
			Industrial
			(dollars in thousands)
	Three months ended September 30, 2013
	Beginning Balance, July 1, 2013		$	2,485		$	16,685		$	4,317		$	3,552		$	678		$	106		$	56		$	263		$	28,142
	Charge-offs			1,311			851			0			116			0			16			0			0			2,294
	Recoveries			16			186			0			0			0			0			0			0			202
	Provision for loan losses			2,029			(349	)		(1,163	)		(216	)		1			13			(14	)		449			750
	Ending Balance, September 30, 2013		$	3,219		$	15,671		$	3,154		$	3,220		$	679		$	103		$	42		$	712		$	26,800
	Nine months ended September 30, 2013
	Beginning Balance, January 1, 2013		$	1,477		$	15,439		$	3,991		$	3,233		$	750		$	154		$	71		$	722		$	25,837
	Charge-offs			1,407			2,742			1,470			315			0			16			0			0			5,950
	Recoveries			181			246			0			7			0			9			0			0			443
	Provision for loan losses			2,968			2,728			633			295			(71	)		(44	)		(29	)		(10	)		6,470
	Ending Balance, September 30, 2013		$	3,219		$	15,671		$	3,154		$	3,220		$	679		$	103		$	42		$	712		$	26,800
	At September 30, 2013
	Loans:
	Individually evaluated for impairment		$	20,162		$	22,910		$	3,978		$	3,205		$	0		$	75		$	0		$	0		$	50,330
	Collectively evaluated for impairment			195,857			1,449,009			39,058			134,582			140,869			1,258			1,006			0			1,961,639
	Loans acquired with credit deterioration			4,601			48,634			13,830			14,949			5,189			556			0			0			87,759
	Market discounts/premiums/valuation adjustments																											59
																											$	2,099,787
	Allowance for loan losses:
	Individually evaluated for impairment		$	961		$	2,233		$	368		$	187		$	0		$	1		$	0		$	0		$	3,750
	Collectively evaluated for impairment			1,991			8,315			241			1,115			80			40			42			712			12,536
	Loans acquired with credit deterioration			267			5,123			2,545			1,918			599			62			0			0			10,514
			$	3,219		$	15,671		$	3,154		$	3,220		$	679		$	103		$	42		$	712		$	26,800
	Three months ended September 30, 2012
	Beginning Balance, July 1, 2012		$	1,503		$	8,266		$	4,352		$	1,080		$	40		$	75		$	802		$	0		$	16,118
	Charge-offs			266			283			475			365			0			27			0			0			1,416
	Recoveries			98			33			3			0			0			22			0			0			156
	Provision for loan losses			387			5,923			1,139			2,262			858			279			(732	)		0			10,116
	Ending Balance, September 30, 2012		$	1,722		$	13,939		$	5,019		$	2,977		$	898		$	349		$	70		$	0		$	24,974
	Nine months ended September 30, 2012
	Beginning Balance, January 1, 2012		$	1,441		$	7,029		$	4,656		$	844		$	18		$	61		$	929		$	54		$	15,032
	Charge-offs			300			1,426			2,666			565			0			37			0			0			4,994
	Recoveries			164			83			3			5			0			27			0			0			282
	Provision for loan losses			417			8,253			3,026			2,693			880			298			(859	)		(54	)		14,654
	Ending Balance, September 30, 2012		$	1,722		$	13,939		$	5,019		$	2,977		$	898		$	349		$	70		$	0		$	24,974
	At September 30, 2012
	Loans:
	Individually evaluated for impairment		$	4,558		$	37,250		$	13,169		$	4,540		$	0		$	273		$	0		$	0		$	59,790
	Collectively evaluated for impairment			79,448			543,772			11,056			100,751			150,876			11,356			9,321			0			906,580
	Loans acquired with credit deterioration			5,774			70,915			18,904			15,819			13,113			2,125			0			0			126,650
	Market discounts/premiums/valuation adjustments																											(5,921	)
																											$	1,087,099
	Allowance for loan losses:
	Individually evaluated for impairment		$	349		$	2,787		$	2,450		$	250		$	0		$	3		$	0		$	0		$	5,839
	Collectively evaluated for impairment			877			5,379			262			878			757			93			70			0			8,316
	Loans acquired with credit deterioration			496			5,773			2,307			1,849			141			253			0			0			10,819
			$	1,722		$	13,939		$	5,019		$	2,977		$	898		$	349		$	70		$	0		$	24,974
	-1	The non-covered manufactured housing portfolio was 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 September 30, 2013 and 2012, funds available for reimbursement, if necessary, were $2.9 million and $4.1 million, respectively. Quarterly, these funds are evaluated to determine if they would be sufficient to absorb probable losses within the manufactured housing portfolio.
Changes in Accretable Discount Related to Purchased Credit Impaired Loans	'
	The changes in accretable yield related to purchased-credit-impaired loans for the three and nine months ended September 30, 2013 and 2012 were as follows:
	For the Three Months Ended September 30,		2013			2012
			(dollars in thousands)
	Accretable yield balance, beginning of period		$	27,649		$	43,230
	Accretion to interest income			(1,362	)		(7,384	)
	Reclassification from nonaccretable difference and disposals, net			(754	)		(147	)
	Accretable yield balance, end of period		$	25,533		$	35,699
	For the Nine Months Ended September 30,		2013			2012
			(dollars in thousands)
	Accretable yield balance, beginning of period		$	32,174		$	45,358
	Accretion to interest income			(5,034	)		(9,443	)
	Reclassification from nonaccretable difference and disposals, net			(1,607	)		(216	)
	Accretable yield balance, end of period		$	25,533		$	35,699

FDIC_Loss_Sharing_Receivable_T

FDIC Loss Sharing Receivable (Tables)	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Activity Related to FDIC Loss Sharing Receivable	'
	The following table summarizes the activity related to the FDIC loss sharing receivable for the three and nine months ended September 30, 2013 and 2012:
	Three Months Ended September 30,	2013			2012
		(dollars in thousands)
	Balance, beginning of period	$	14,169		$	12,376
	Change in FDIC loss sharing receivable		(125	)		3,796
	Reimbursement from the FDIC		(3,006	)		(3,866	)
	Balance, end of period	$	11,038		$	12,306
	Nine Months Ended September 30,	2013			2012
		(dollars in thousands)
	Balance, beginning of period	$	12,343		$	13,077
	Change in FDIC loss sharing receivable		4,829			4,537
	Reimbursement from the FDIC		(6,134	)		(5,308	)
	Balance, end of period	$	11,038		$	12,306

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Statement of Weighted-Average Assumptions Used and Resulting Weighted-Average Fair Value of Option	'
	Black-Scholes option pricing model. The following table presents the weighted-average assumptions used and the resulting weighted-average fair value of an option.
		September 30, 2013			December 31, 2012
	Weighted-average risk-free interest rate		1.41	%		1.15	%
	Expected dividend yield		0	%		0	%
	Weighted-average expected volatility		13.77	%		17.47	%
	Expected life (in years)		7			6.98
	Weighted-average fair value	$	3.16		$	3.04
Summary of Stock Option Activity	'
	The following table summarizes stock option activity for the nine months ended September 30, 2013.
		Number			Weighted-			Weighted-		Aggregate
		of Options			average			average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual
								Term in Years
		(aggregate intrinsic value in thousands)
	Outstanding at January 1, 2013		2,003,889		$	12.49
	Granted		780,597			16.67
	Forfeited		(5,000	)		14.94
	Outstanding at September 30, 2013		2,779,486		$	13.66			8.16	$	7,480
	Vested and expected to vest at September 30, 2013		2,779,486		$	13.66			8.16	$	7,480
	Exercisable at September 30, 2013		14,438			20.06			3.57		12

Regulatory_Matters_Tables

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Summary of Capital Amounts and Ratios	'
	The Bancorp’s and the Bank’s capital amounts and ratios at September 30, 2013 and December 31, 2012 are as follows:
		Actual					For Capital Adequacy					To Be Well Capitalized
							Purposes					Under
												Prompt Corrective Action
												Provisions
	(dollars in thousands)	Amount		Ratio			Amount		Ratio			Amount		Ratio
	As of September 30, 2013:
	Total capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	413,900		13.6	%	$	243,500		8	%		N/A		N/A
	Customers Bank	$	427,809		14.18	%	$	241,298		8	%	$	301,622		10	%
	Tier 1 capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	386,517		12.7	%	$	121,750		4	%		N/A		N/A
	Customers Bank	$	400,426		13.28	%	$	120,649		4	%	$	180,973		6	%
	Tier 1 capital (to average assets)
	Customers Bancorp, Inc.	$	386,517		10.63	%	$	145,388		4	%		N/A		N/A
	Customers Bank	$	400,426		11.04	%	$	145,043		4	%	$	181,303		5	%
	As of December 31, 2012:
	Total capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	289,035		11.26	%	$	205,443		8	%		N/A		N/A
	Customers Bank	$	244,710		9.53	%	$	205,442		8	%	$	256,802		10	%
	Tier 1 capital (to risk weighted assets)
	Customers Bancorp, Inc.	$	262,719		10.23	%	$	102,722		4	%		N/A		N/A
	Customers Bank	$	218,394		8.5	%	$	102,721		4	%	$	154,081		6	%
	Tier 1 capital (to average assets)
	Customers Bancorp, Inc.	$	262,719		9.3	%	$	112,939		4	%		N/A		N/A
	Customers Bank	$	218,394		7.74	%	$	112,896		4	%	$	141,120		5	%

Disclosures_about_Fair_Value_o1

Disclosures about Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Estimated Fair Values of Financial Instruments	'
	The estimated fair values of the Bancorp’s financial instruments were as follows at September 30, 2013 and December 31, 2012.
									Fair Value Measurements at September 30, 2013
			Carrying			Estimated			Quoted			Significant		Significant
			Amount			Fair Value			Prices in			Other		Unobservable
									Active			Observable		Inputs
									Markets for			Inputs		(Level 3)
									Identical			(Level 2)
									Assets
									(Level 1)
			(dollars in thousands)
	Assets:
	Cash and cash equivalents		$	255,653		$	255,653		$	255,653		$	0	$	0
	Investment securities, available for sale			497,566			497,566			22,905			474,661		0
	Loans held for sale			917,939			917,939			0			917,939		0
	Loans receivable, net			2,072,987			2,088,789			0			0		2,088,789
	FHLB, Federal Reserve Bank and other stock			19,113			19,113			0			19,113		0
	FDIC loss sharing receivable			11,038			11,038			0			11,038		0
	Derivatives not designated as hedging instruments			1,911			1,911			0			1,911		0
	Fraudulent loans receivable (1)			669			669			0			0		669
	Accrued interest receivable			7,866			7,866			7,866			0		0
	Liabilities:
	Deposits		$	3,243,312		$	3,247,129		$	671,211		$	2,575,918	$	0
	Other borrowings			235,250			238,251			0			238,251		0
	Subordinated debt			2,000			2,000			0			2,000		0
	Derivatives not designated as hedging instruments			1,871			1,871			0			1,871		0
	Accrued interest payable			1,761			1,761			1,761			0		0
	-1	Included in Other Assets
									Fair Value Measurements at December 31, 2012
			Carrying			Estimated			Quoted			Significant		Significant
			Amount			Fair Value			Prices in			Other		Unobservable
									Active			Observable		Inputs
									Markets for			Inputs		(Level 3)
									Identical			(Level 2)
									Assets
									(Level 1)
			(dollars in thousands)
	Assets:
	Cash and cash equivalents		$	186,016		$	186,016		$	186,016		$	0	$	0
	Investment securities, available for sale			129,093			129,093			6			129,087		0
	Loans held for sale			1,439,889			1,439,889			0			1,439,889		0
	Loans receivable, net			1,298,630			1,307,049			0			0		1,307,049
	FHLB, Federal Reserve Bank and other stock			30,163			30,163			0			30,163		0
	FDIC loss sharing receivable			12,343			12,343			0			12,343		0
	Accrued interest receivable			5,790			5,790			5,790			0		0
	Liabilities:
	Deposits		$	2,440,818		$	2,674,765		$	219,687		$	2,455,078	$	0
	Federal funds purchased			5,000			5,000			5,000			0		0
	Other borrowings			471,000			471,432			0			471,432		0
	Subordinated debt			2,000			2,000			0			2,000		0
	Accrued interest payable			1,530			1,530			1,530			0		0
Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis	'
	For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at September 30, 2013 and December 31, 2012 were as follows:
			September 30, 2013
			Fair Value Measurements at the End of the Reporting Period Using
			Quoted Prices in			Significant Other			Significant			Total
			Active Markets for			Observable Inputs			Unobservable
			Identical Assets			(Level 2)			Inputs
			(Level 1)						(Level 3)
			(dollars in thousands)
	Measured at Fair Value on a Recurring Basis:
	Assets
	Available-for-sale securities:
	Mortgage-backed securities		$	0		$	449,521		$	0		$	449,521
	Corporate notes			0			25,140			0			25,140
	Equity securities			22,905			0			0			22,905
	Derivatives not designated as hedging instruments (1)			0			1,911			0			1,911
	Mortgage warehouse loans held for sale			0			840,425			0			840,425
	Total assets - recurring fair value measurements		$	22,905		$	1,316,997		$	0		$	1,339,902
	Liabilities
	Derivatives not designated as hedging instruments (2)		$	0		$	1,871		$	0		$	1,871
	Measured at Fair Value on a Nonrecurring Basis:
	Assets
	Impaired loans, net of specific reserves of $3,750		$	0		$	0		$	7,850		$	7,850
	Other real estate owned			0			0			10,259			10,259
	Total assets - nonrecurring fair value measurements		$	0		$	0		$	18,109		$	18,109
	-1	Included in Other Assets
	-2	Included in Other Liabilities
			December 31, 2012
			Fair Value Measurements at the End of the Reporting Period Using
			Quoted Prices in			Significant Other			Significant			Total
			Active Markets for			Observable Inputs			Unobservable
			Identical Assets			(Level 2)			Inputs
			(Level 1)						(Level 3)
			(dollars in thousands)
	Measured at Fair Value on a Recurring Basis:
	Assets
	Available-for-sale securities:
	Mortgage-backed securities		$	0		$	104,135		$	0		$	104,135
	Corporate notes			0			24,952			0			24,952
	Equity securities			6			0			0			6
	Mortgage warehouse loans held for sale			0			1,248,935			0			1,248,935
	Total assets - recurring fair value measurements		$	6		$	1,378,022		$	0		$	1,378,028
	Measured at Fair Value on a Nonrecurring Basis:
	Assets
	Impaired loans, net of specific reserves of $4,625		$	0		$	0		$	11,004		$	11,004
	Other real estate owned			0			0			5,737			5,737
	Total assets - nonrecurring fair value measurements		$	0		$	0		$	16,741		$	16,741
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 months ended September 30, 2013 and 2012 are summarized as follows.
	There were no Level 3 assets or liabilities measured at fair value on a recurring basis during the three months ended September 30, 2013.
			Mortgage-			Corporate			Total
			backed			Notes
			Securities
			(dollars in thousands)
	Balance at July 1, 2012		$	2,632		$	24,203		$	26,835
	Total gains included in other comprehensive income (before taxes)			0			469			469
	Amortization included in interest income			(29	)		0			(29	)
	Settlements			(2,603	)		0			(2,603	)
	Balance at September 30, 2012		$	0		$	24,672		$	24,672
	The changes in Level 3 assets measured at fair value on a recurring basis for the nine months ended September 30, 2013 and 2012 are summarized as follows.
			Loans
			Held for
			Sale (1)
			(dollars in thousands)
	Balance at January 1, 2013		$	0
	Transfer from Level 2 to Level 3 (1)			3,173
	Recoveries			(1,463	)
	Sales			(1,013	)
	Transfer from loans held for sale to other assets (1)			(697	)
	Balance at September 30, 2013		$	0
			Mortgage-			Corporate			Total
			backed			Notes
			Securities
			(dollars in thousands)
	Balance at January 1, 2012		$	2,894		$	19,217		$	22,111
	Total gains included in other comprehensive income (before taxes)			0			455			455
	Amortization included in interest income			(291	)		0			(291	)
	Settlements			(2,603	)		0			(2,603	)
	Purchases			0			5,000			5,000
	Balance at September 30, 2012		$	0		$	24,672		$	24,672
	-1	The Bancorp’s policy is to recognize transfers between levels when events or circumstances warrant transfers. During the first quarter of 2013, a suspected fraud was discovered in the Bank’s loans held-for-sale portfolio. Total loans involved in this fraud initially appeared to be $5.2 million, and management believed the range of possible loss to have been between $1.5 million and $3.2 million. Accordingly, management provided a loss contingency of $2.0 million at March 31, 2013. Due to the uncertainty surrounding the amount of loss, management transferred these loans and the related loss contingency from Level 2 to Level 3. During the second quarter of 2013, the Bank determined that an aggregate of $1.0 million of the loans were not involved in the fraud, and these loans were subsequently sold. In addition, the Bank recovered $1.5 million in cash from the alleged perpetrator. Since it was resolved that the loans no longer met the definition of “a loan,” and since the Bank is pursuing restitution through the involved parties, the Bank determined this to be a receivable. As a result, the remaining aggregate of $2.7 million of loans and the related $2.0 million reserve were transferred to Other assets.
Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis	'
	The following table summarizes financial assets and financial liabilities measured at fair value as of September 30, 2013 on a recurring and nonrecurring basis for which the Bancorp utilized Level 3 inputs to measure fair value. The valuation techniques, unobservable inputs, and ranges (weighted average) are the same as those disclosed at December 31, 2012.
			Quantitative Information about Level 3 Fair Value Measurements
	September 30, 2013		Fair Value			Valuation Technique		Unobservable Input	Range (Weighted
			Estimate						Average) (3)
			(dollars in thousands)
	Impaired loans		$	7,850		Collateral appraisal (1)		Liquidation expenses (2)	-3% to -8% (-5.5%)
	Other real estate owned		$	10,259		Collateral appraisal (1)		Liquidation expenses (2)	-3% to -8% (-5.5%)
	-1	Obtained from independent third-parties approved appraisers. Appraisals are current and in compliance with credit policy. The Bancorp does not discount appraisals.
	-2	Fair value is adjusted for costs to sell.
	-3	Presented as a percentage of the value determined by appraisal.

Derivative_Instruments_and_Hed1

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Fair Value of Derivative Financial Instruments	'
	The following table presents the fair value of the Bancorp’s derivative financial instruments as well as the classification on the balance sheet.
		Fair Value of Derivative Instruments
		30-Sep-13
		Asset Derivatives			Liability Derivatives
		Balance sheet	Fair value		Balance sheet	Fair value
		location			location
		(dollars in thousands)
	Derivatives not designated as hedging instruments
	Interest rate swap products	Other assets	$	1,911	Other liabilities	$	1,871
Effect of Derivative Instruments on Comprehensive Income	'
	The following table presents the effect of the Bancorp’s derivative financial instruments on comprehensive income for the three and nine months ended September 30, 2013.
		Effect of Derivative Instruments on Comprehensive Income
		Three Months Ended September 30, 2013
		Location of loss	Amount of loss
		recognized in income	recognized in income
		on derivatives	on derivatives
		(dollars in thousands)
	Derivatives not designated as hedging instruments
	Interest rate swap products	Other non-interest income	$	38
		Effect of Derivative Instruments on Comprehensive Income
		Nine Months Ended September 30, 2013
		Location of gain	Amount of gain
		recognized in income	recognized in income
		on derivatives	on derivatives
		(dollars in thousands)
	Derivatives not designated as hedging instruments
	Interest rate swap products	Other non-interest income	$	236

Disclosures_about_Offsetting_A1

Disclosures about Offsetting Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

'

Summary of Offsetting Financial Derivative Assets and Liabilities

'

The following tables present derivative instruments that are subject to enforceable master netting arrangements. The Bancorp has not made a policy election to offset its derivative positions.

Offsetting of Financial Assets and Derivative Assets

For the Nine Months Ended September 30, 2013

Gross amounts not offset in

the consolidated balance sheet

Gross amount of

Gross amounts

Net amounts of

Financial

Cash collateral

Net amount

recognized assets

offset in the

assets presented

instruments

received

consolidated

in the consolidated

balance sheet

balance sheet

(dollars in thousands)

Description

Interest rate swap derivatives with institutional counterparties

$

177

$

0

$

177

$

177

$

0

$

0

Offsetting of Financial Liabilities and Derivative Liabilities

For the Nine Months Ended September 30, 2013

Gross amounts not offset in

the consolidated balance sheet

Gross amount of

Gross amounts

Net amounts of

Financial

Cash collateral

Net amount

recognized liabilities

offset in the

liabilities presented

instruments

pledged

consolidated

in the consolidated

balance sheet

balance sheet

(dollars in thousands)

Description

Interest rate swap derivatives with institutional counterparties

$

1,746

$

0

$

1,746

$

177

$

1,569

$

0

Acquisition_Activity_Additiona

Acquisition Activity - Additional Information (Detail) (USD $)	Mar. 28, 2013	Mar. 28, 2013	Apr. 23, 2013	Mar. 31, 2013	Sep. 30, 2013	22-May-13	Sep. 30, 2013	Sep. 30, 2013
	Office	New England Commercial Lending [Member]	CMS Bancorp Acquisition [Member]	CMS Bancorp Acquisition [Member]	CMS Bancorp Acquisition [Member]	CMS Bancorp Acquisition [Member]	CMS Bancorp Acquisition [Member]	CMS Bancorp Acquisition [Member]
						Series A Noncumulative Perpetual Preferred Stock [Member]	CMS Common Equity [Member]	Customers Common Equity [Member]
Capital Unit [Line Items]	'	'	'	'	'	'	'	'
Business acquisition, acquiree valuation percent	'	'	'	'	'	'	0.95%	'
Business acquisition, acquirer valuation percent	'	'	'	'	'	'	'	1.25%
CMS Merger Agreement termination description	'	'	'	'	'CMS's ability to have terminated the Merger Agreement, as amended, exercisable at any time after May 20, 2013, if either (i) the Bancorp had not made an investment in CMS of $1.5 million of CMS Preferred Stock, or (ii) the Bancorp and CMS had not agreed upon the terms of a $2.0 million senior secured lending facility that the Bancorp will have made available to CMS;	'	'	'
Investment in preferred stock	'	'	'	'	$1,500,000	'	'	'
Senior secured lending facility	'	'	'	'	2,000,000	'	'	'
Partial reimbursement for merger-related expenses	'	'	300,000	300,000	'	'	'	'
Payment of termination fees	'	'	'	'	1,000,000	'	'	'
Purchase of Noncumulative Perpetual Preferred Stock	'	'	'	'	'	1,500,000	'	'
Purchase of Noncumulative Perpetual Preferred shares	'	'	'	'	'	1,500	'	'
Commercial loan commitments acquired	'	182,300,000	'	'	'	'	'	'
Acquired commercial loan commitments outstanding	'	$155,100,000	'	'	'	'	'	'
Purchase price as percentage of loans outstanding	'	98.70%	'	'	'	'	'	'
Number of commercial lending offices	2	'	'	'	'	'	'	'

Changes_in_Accumulated_Other_C2

Changes in Accumulated Other Comprehensive Income by Component - Changes in Accumulated Other Comprehensive Income (Detail) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Beginning Balance	($3,530)	$1,064
Other comprehensive loss before reclassifications	-7	-4,601
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive (loss) income	-7	-4,601
Ending balance	-3,537	-3,537
Unrealized Gains and Losses on Available-for-Sale Securities [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Beginning Balance	-3,530	1,064
Other comprehensive loss before reclassifications	-8	-4,602
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive (loss) income	-8	-4,602
Ending balance	-3,538	-3,538
Foreign Currency Items [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Beginning Balance	0	0
Other comprehensive loss before reclassifications	1	1
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive (loss) income	1	1
Ending balance	$1	$1

Earnings_Per_Share_Components_

Earnings Per Share - Components of Earnings Per Share (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Net income allocated to common shareholders	$8,268	$6,636	$23,683	$16,252
Weighted-average number of common shares - basic	24,678,317	12,465,744	21,494,880	11,723,090
Share-based compensation plans	475,987	310,845	383,326	231,674
Warrants	182,898	134,926	175,999	112,265
Weighted-average number of common shares - diluted	25,337,202	12,911,515	22,054,205	12,067,029
Basic earnings per share	$0.34	$0.53	$1.10	$1.39
Diluted earnings per share	$0.33	$0.51	$1.07	$1.35

Earnings_Per_Share_Antidilutiv

Earnings Per Share - Anti-dilutive Securities Excluded from Computation of Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Weighted-average anti-dilutive securities:	'	'	'	'
Total anti-dilutive securities	210,990	136,538	205,874	136,538
Share-Based Compensation Awards [Member]	'	'	'	'
Weighted-average anti-dilutive securities:	'	'	'	'
Total anti-dilutive securities	92,245	6,592	87,129	6,592
Warrants [Member]	'	'	'	'
Weighted-average anti-dilutive securities:	'	'	'	'
Total anti-dilutive securities	118,745	129,946	118,745	129,946

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended
	Jun. 30, 2012	Sep. 30, 2013	Dec. 31, 2012
	CorporateBond	Security	Security
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Reclassification of held-to-maturity investment portfolio to available for sale	'	$269,000,000	'
Available-for-sale securities maturity period	'	'2 years	'
prohibited from classifying security purchases as held to maturity date	'	31-May-14	'
Number of available-for-sale investment securities in the less than twelve month category	'	20	2
Number of available-for-sale investment securities in the twelve month or more category	'	7	8
Number of corporate bonds downgraded	5	'	'
Pledged investment securities fair value	'	329,800,000	103,500,000
Purchase of common shares	'	24,742,000	18,507,000
Religare Enterprises Limited [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Purchase of common shares	'	4,100,000	'
Total investments	'	$23,100,000	'
Current outstanding shares	'	2.80%	'

Investment_Securities_Summary_

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$503,007	$127,455
Gross Unrealized Gains	1,654	1,884
Gross Unrealized Losses	7,095	246
Available-for-sale Securities, Fair Value Total	497,566	129,093
Mortgage-backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	454,933	102,449
Gross Unrealized Gains	1,410	1,795
Gross Unrealized Losses	6,822	109
Available-for-sale Securities, Fair Value Total	449,521	104,135
Corporate Notes [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	25,000	25,000
Gross Unrealized Gains	163	89
Gross Unrealized Losses	23	137
Available-for-sale Securities, Fair Value Total	25,140	24,952
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	23,074	6
Gross Unrealized Gains	81	0
Gross Unrealized Losses	250	0
Available-for-sale Securities, Fair Value Total	$22,905	$6

Investment_Securities_Summary_1

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Parenthetical) (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Investments Debt And Equity Securities [Abstract]	'	'
Aggregate amortized cost of private - label securities	$521	$629
Aggregate fair value of private -label securities	$513	$612

Investment_Securities_Statemen

Investment Securities - Statement of Proceeds from Sale of Available for Sale Investment Securities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments Debt And Equity Securities [Abstract]	'	'	'	'
Proceeds from sale of available-for-sale securities	$0	$0	$0	$306,610
Gross gains	0	0	0	9,006
Gross losses	0	0	0	0
Net gains	$0	$0	$0	$9,006

Investment_Securities_Summary_2

Investment Securities - Summary of Investments Available for Sale Debt Securities by Stated Maturity (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Investments Debt And Equity Securities [Abstract]	'
Amortized Cost, Due in one year or less	$0
Amortized Cost, Due after one year through five years	25,000
Amortized Cost, Due after five years through ten years	0
Amortized Cost, Due after ten years	0
Mortgage-backed securities, Amortized Cost	454,933
Total debt securities, Amortized Cost	479,933
Fair Value, Due in one year or less	0
Fair Value, Due after one year through five years	25,140
Fair Value, Due after five years through ten years	0
Fair Value, Due after ten years	0
Mortgage-backed securities, Fair Value	449,521
Total debt securities, Fair Value	$474,661

Investment_Securities_Gross_Un

Investment Securities - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Less Than 12 Months, Fair Value	$156,168	$5,695
Less Than 12 Months, Unrealized Losses	7,081	87
12 Months or More, Fair Value	5,306	10,291
12 Months or More, Unrealized Losses	14	159
Fair Value, Total	161,474	15,986
Gross Unrealized Losses	7,095	246
Mortgage-backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less Than 12 Months, Fair Value	129,120	5,695
Less Than 12 Months, Unrealized Losses	6,811	87
12 Months or More, Fair Value	309	429
12 Months or More, Unrealized Losses	11	22
Fair Value, Total	129,429	6,124
Gross Unrealized Losses	6,822	109
Corporate Notes [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less Than 12 Months, Fair Value	4,980	0
Less Than 12 Months, Unrealized Losses	20	0
12 Months or More, Fair Value	4,997	9,862
12 Months or More, Unrealized Losses	3	137
Fair Value, Total	9,977	9,862
Gross Unrealized Losses	23	137
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less Than 12 Months, Fair Value	22,068	'
Less Than 12 Months, Unrealized Losses	250	'
12 Months or More, Fair Value	0	'
12 Months or More, Unrealized Losses	0	'
Fair Value, Total	22,068	'
Gross Unrealized Losses	$250	$0

Loans_Receivable_and_Allowance2

Loans Receivable and Allowance for Loan Losses - Composition of Net Loans Receivable (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	$81,255	'	$107,526	'	'	'
Total loans receivable	2,018,532	'	1,216,941	1,087,099	'	'
Total loans receivable	2,099,728	'	1,322,788	'	'	'
Deferred (fees) costs, net	59	'	1,679	'	'	'
Allowance for loan losses	-26,800	-28,142	-25,837	-24,974	-16,118	-15,032
Total loans receivable, net (excluding loans held for sale)	2,072,987	'	1,298,630	'	'	'
Total Loans Receivable Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	81,255	'	107,526	'	'	'
Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	2,018,473	'	1,215,262	'	'	'
Construction [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Allowance for loan losses	-3,154	-4,317	-3,991	-5,019	-4,352	-4,656
Construction [Member] | Total Loans Receivable Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	22,192	'	27,792	'	'	'
Construction [Member] | Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	34,674	'	28,897	'	'	'
Commercial Real Estate [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Allowance for loan losses	-15,671	-16,685	-15,439	-13,939	-8,266	-7,029
Commercial Real Estate [Member] | Total Loans Receivable Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	29,623	'	44,901	'	'	'
Commercial Real Estate [Member] | Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	1,490,930	'	835,488	'	'	'
Commercial and Industrial [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Allowance for loan losses	-3,219	-2,485	-1,477	-1,722	-1,503	-1,441
Commercial and Industrial [Member] | Total Loans Receivable Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	6,826	'	11,153	'	'	'
Commercial and Industrial [Member] | Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	213,794	'	75,118	'	'	'
Residential Real Estate [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Allowance for loan losses	-3,220	-3,552	-3,233	-2,977	-1,080	-844
Residential Real Estate [Member] | Total Loans Receivable Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	19,233	'	19,952	'	'	'
Residential Real Estate [Member] | Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	133,503	'	109,430	'	'	'
Manufactured Housing [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	3,381	'	3,728	'	'	'
Allowance for loan losses	-679	-678	-750	-898	-40	-18
Manufactured Housing [Member] | Total Loans Receivable Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	3,381	'	3,728	'	'	'
Manufactured Housing [Member] | Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	142,677	'	154,703	'	'	'
Mortgage Warehouse [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Allowance for loan losses	-42	-56	-71	-70	-802	-929
Mortgage Warehouse [Member] | Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	1,006	'	9,565	'	'	'
Consumer [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Allowance for loan losses	-103	-106	-154	-349	-75	-61
Consumer [Member] | Total Loans Receivable Not Covered Under FDIC Loss Sharing Agreements [Member]	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans receivable	$1,889	'	$2,061	'	'	'

Loans_Receivable_and_Allowance3

Loans Receivable and Allowance for Loan Losses - Composition of Net Loans Receivable (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2013
	FDIC
Receivables [Abstract]	'
Loans acquired in FDIC-assisted transactions	2

Loans_Receivable_and_Allowance4

Loans Receivable and Allowance for Loan Losses - Non-Covered Loans and Covered Loans, by Class (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
PCI Loans	$50,330	$55,976
Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	6,711	11,090
Greater Than 90 Days	3,095	1,966
Total Past Due	9,806	13,056
Non-Accrual	14,942	22,347
Current	1,936,154	1,110,616
PCI Loans	57,571	69,243
Total Loans	2,018,473	1,215,262
Covered Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	86	268
Greater Than 90 Days	0	0
Total Past Due	86	268
Non-Accrual	5,788	10,504
Current	45,193	53,488
PCI Loans	30,188	43,266
Total Loans	81,255	107,526
Commercial and Industrial [Member] | Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	38
Greater Than 90 Days	0	0
Total Past Due	0	38
Non-Accrual	221	288
Current	211,404	72,715
PCI Loans	2,169	2,077
Total Loans	213,794	75,118
Commercial and Industrial [Member] | Covered Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	220
Greater Than 90 Days	0	0
Total Past Due	0	220
Non-Accrual	0	100
Current	4,394	8,404
PCI Loans	2,432	2,429
Total Loans	6,826	11,153
Commercial Real Estate [Member] | Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	1,437
Greater Than 90 Days	0	0
Total Past Due	0	1,437
Non-Accrual	10,625	17,770
Current	1,442,061	770,508
PCI Loans	38,244	45,773
Total Loans	1,490,930	835,488
Commercial Real Estate [Member] | Covered Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	0	0
Non-Accrual	1,821	3,712
Current	17,413	20,859
PCI Loans	10,389	20,330
Total Loans	29,623	44,901
Construction [Member] | Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	0	0
Non-Accrual	2,050	2,423
Current	31,683	25,022
PCI Loans	941	1,452
Total Loans	34,674	28,897
Construction [Member] | Covered Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	0	0
Non-Accrual	3,382	5,244
Current	5,920	6,472
PCI Loans	12,890	16,076
Total Loans	22,192	27,792
Residential Real Estate [Member] | Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	400	381
Greater Than 90 Days	0	0
Total Past Due	400	381
Non-Accrual	945	1,669
Current	121,550	95,396
PCI Loans	10,608	11,984
Total Loans	133,503	109,430
Residential Real Estate [Member] | Covered Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	0	0
Non-Accrual	564	1,358
Current	14,328	14,226
PCI Loans	4,341	4,368
Total Loans	19,233	19,952
Consumer [Member] | Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	0	0
Non-Accrual	0	56
Current	1,469	1,486
PCI Loans	420	519
Total Loans	1,889	2,061
Mortgage Warehouse [Member] | Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater Than 90 Days	0	0
Total Past Due	0	0
Non-Accrual	0	0
Current	1,006	9,565
PCI Loans	0	0
Total Loans	1,006	9,565
Manufactured Housing [Member] | Non-covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	6,311	9,234
Greater Than 90 Days	3,095	1,966
Total Past Due	9,406	11,200
Non-Accrual	1,101	141
Current	126,981	135,924
PCI Loans	5,189	7,438
Total Loans	142,677	154,703
Manufactured Housing [Member] | Covered Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	86	48
Greater Than 90 Days	0	0
Total Past Due	86	48
Non-Accrual	21	90
Current	3,138	3,527
PCI Loans	136	63
Total Loans	$3,381	$3,728

Loans_Receivable_and_Allowance5

Loans Receivable and Allowance for Loan Losses - Non-Covered Loans and Covered Loans, by Class (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Due days for loan payments	'29 days
Delinquent period	'90 days

Loans_Receivable_and_Allowance6

Loans Receivable and Allowance for Loan Losses - Summary of Impaired Loans (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Net of Charge Offs, Total	$50,330	'	$55,976
Unpaid Principle Balance, Total	54,734	'	59,077
Related Allowance	3,750	'	4,625
Average Recorded Investment, Total	55,091	55,228	'
Interest Income Recognized, Total	1,338	1,370	'
Commercial and Industrial [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Net of Charge Offs, With an allowance recorded	3,333	'	374
Unpaid Principal Balance, With an allowance recorded	4,603	'	374
Related Allowance	961	'	295
Recorded Investment Net of Charge Offs, With no related allowance recorded	16,829	'	3,844
Unpaid Principal Balance, With no related allowance recorded	16,891	'	3,844
With an allowance recorded, Average Recorded Investment	1,192	748	'
With an allowance recorded, Interest Income Recognized	157	9	'
With no related allowance recorded, Average Recorded Investment	6,697	5,191	'
With no related allowance recorded, Interest Income Recognized	362	160	'
Commercial Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Net of Charge Offs, With an allowance recorded	6,687	'	8,708
Unpaid Principal Balance, With an allowance recorded	7,637	'	10,022
Related Allowance	2,233	'	2,505
Recorded Investment Net of Charge Offs, With no related allowance recorded	16,223	'	26,626
Unpaid Principal Balance, With no related allowance recorded	17,075	'	27,477
With an allowance recorded, Average Recorded Investment	7,919	9,071	'
With an allowance recorded, Interest Income Recognized	169	205	'
With no related allowance recorded, Average Recorded Investment	23,271	22,205	'
With no related allowance recorded, Interest Income Recognized	548	748	'
Construction [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Net of Charge Offs, With an allowance recorded	1,148	'	5,116
Unpaid Principal Balance, With an allowance recorded	1,148	'	6,022
Related Allowance	368	'	1,541
Recorded Investment Net of Charge Offs, With no related allowance recorded	2,830	'	6,588
Unpaid Principal Balance, With no related allowance recorded	4,100	'	6,618
With an allowance recorded, Average Recorded Investment	5,544	6,903	'
With an allowance recorded, Interest Income Recognized	46	154	'
With no related allowance recorded, Average Recorded Investment	6,545	7,627	'
With no related allowance recorded, Interest Income Recognized	14	19	'
Consumer [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Net of Charge Offs, With an allowance recorded	54	'	100
Unpaid Principal Balance, With an allowance recorded	54	'	100
Related Allowance	1	'	14
Recorded Investment Net of Charge Offs, With no related allowance recorded	21	'	101
Unpaid Principal Balance, With no related allowance recorded	21	'	101
With an allowance recorded, Average Recorded Investment	46	29	'
With an allowance recorded, Interest Income Recognized	4	4	'
With no related allowance recorded, Average Recorded Investment	133	105	'
With no related allowance recorded, Interest Income Recognized	0	3	'
Residential Real Estate [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment Net of Charge Offs, With an allowance recorded	378	'	1,331
Unpaid Principal Balance, With an allowance recorded	378	'	1,331
Related Allowance	187	'	270
Recorded Investment Net of Charge Offs, With no related allowance recorded	2,827	'	3,188
Unpaid Principal Balance, With no related allowance recorded	2,827	'	3,188
With an allowance recorded, Average Recorded Investment	953	967	'
With an allowance recorded, Interest Income Recognized	2	13	'
With no related allowance recorded, Average Recorded Investment	2,791	2,382	'
With no related allowance recorded, Interest Income Recognized	$36	$55	'

Loans_Receivable_and_Allowance7

Loans Receivable and Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	Modification	Modification	Modification	Modification
	Commitment	Commitment	Commitment	Commitment
Receivables [Abstract]	'	'	'	'	'
Troubled debt restructurings loans	$6,900,000	$8,200,000	$6,900,000	$8,200,000	'
Financing receivable impairment modification	'	'	'9 months	'	'
Loans receivable excludes loans held for sale, largely mortgage warehouse loans	917,939,000	'	917,939,000	'	1,439,889,000
Commitments to lend additional funds to debtors	0	0	0	0	'
TDRs with subsequent defaults	0	0	0	0	'
Specific reserves resulting from addition of TDR modifications	$0	$0	$0	$0	'

Loans_Receivable_and_Allowance8

Loans Receivable and Allowance for Loan Losses - Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	$12	$532	$1,272	$847
Extended under Forbearance [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	471	0	471
Multiple Extensions Resulting from Financial Difficulty [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	0	0	47
Interest-rate Reductions [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	12	61	1,272	329
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	0	93	315
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Extended under Forbearance [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	0	0	0
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Multiple Extensions Resulting from Financial Difficulty [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	0	0	47
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Interest-rate Reductions [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	0	93	268
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	12	532	1,179	532
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Extended under Forbearance [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	471	0	471
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Multiple Extensions Resulting from Financial Difficulty [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	0	0	0	0
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Interest-rate Reductions [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Amount of loans and leases modified in troubled debt restructurings	$12	$61	$1,179	$61

Loans_Receivable_and_Allowance9

Loans Receivable and Allowance for Loan Losses - Summary of Loans and Leases Modified in Troubled Debt Restructurings, and Recorded Investments and Unpaid Principal Balances (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	Loans	Loans	Loans	Loans
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Recorded Investment	$12	$0	$93	$315
Number of loans and leases modified in troubled debt restructurings	0	0	3	6
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Commercial and Industrial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Construction [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Manufactured Housing [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	2	6
Recorded Investment	0	0	60	315
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Residential Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
TDRs in Compliance With Their Modified Terms and Accruing Interest [Member] | Consumer [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	1	0
Recorded Investment	0	0	33	0
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Recorded Investment	12	532	1,179	532
Number of loans and leases modified in troubled debt restructurings	1	4	11	4
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Commercial and Industrial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Construction [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Manufactured Housing [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	1	1	11	1
Recorded Investment	12	61	1,179	61
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Residential Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	2	0	2
Recorded Investment	0	141	0	141
TDRs in Compliance With Their Modified Terms and Not Accruing Interest [Member] | Consumer [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	1	0	1
Recorded Investment	$0	$330	$0	$330

Recovered_Sheet1

Loans Receivable and Allowance for Loan Losses - Credit Quality Tables for Covered and Non-Covered Loan Portfolio (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	$2,018,532	$1,216,941	$1,087,099
Total loans receivable	81,255	107,526	'
Manufactured Housing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	3,381	3,728	'
Manufactured Housing [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	142,677	154,703	'
Manufactured Housing [Member] | Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	3,274	3,638	'
Manufactured Housing [Member] | Performing [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	141,576	154,562	'
Manufactured Housing [Member] | Nonperforming [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	107	90	'
Manufactured Housing [Member] | Nonperforming [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,101	141	'
Commercial and Industrial [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	6,826	11,153	'
Commercial and Industrial [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	213,794	75,118	'
Commercial and Industrial [Member] | Pass/Satisfactory [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	4,730	8,888	'
Commercial and Industrial [Member] | Pass/Satisfactory [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	200,651	70,955	'
Commercial and Industrial [Member] | Special Mention [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	119	51	'
Commercial and Industrial [Member] | Special Mention [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	12,861	3,836	'
Commercial and Industrial [Member] | Substandard [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,977	2,214	'
Commercial and Industrial [Member] | Substandard [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	282	327	'
Commercial and Industrial [Member] | Doubtful [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	0	'
Commercial and Industrial [Member] | Doubtful [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	0	'
Commercial Real Estate [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	29,623	44,901	'
Commercial Real Estate [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,490,930	835,488	'
Commercial Real Estate [Member] | Pass/Satisfactory [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	17,920	26,195	'
Commercial Real Estate [Member] | Pass/Satisfactory [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,460,484	794,187	'
Commercial Real Estate [Member] | Special Mention [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	3,020	225	'
Commercial Real Estate [Member] | Special Mention [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	16,200	18,737	'
Commercial Real Estate [Member] | Substandard [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	8,683	18,481	'
Commercial Real Estate [Member] | Substandard [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	14,246	21,801	'
Commercial Real Estate [Member] | Doubtful [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	0	'
Commercial Real Estate [Member] | Doubtful [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	763	'
Construction [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	22,192	27,792	'
Construction [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	34,674	28,897	'
Construction [Member] | Pass/Satisfactory [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,972	2,434	'
Construction [Member] | Pass/Satisfactory [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	32,499	26,020	'
Construction [Member] | Special Mention [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	3,949	4,038	'
Construction [Member] | Special Mention [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	88	454	'
Construction [Member] | Substandard [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	16,271	21,320	'
Construction [Member] | Substandard [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	2,087	1,971	'
Construction [Member] | Doubtful [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	0	'
Construction [Member] | Doubtful [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	452	'
Residential Real Estate [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	19,233	19,952	'
Residential Real Estate [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	133,503	109,430	'
Residential Real Estate [Member] | Pass/Satisfactory [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	14,245	14,021	'
Residential Real Estate [Member] | Pass/Satisfactory [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	130,504	105,490	'
Residential Real Estate [Member] | Special Mention [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	455	455	'
Residential Real Estate [Member] | Special Mention [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,380	1,017	'
Residential Real Estate [Member] | Substandard [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	4,533	5,476	'
Residential Real Estate [Member] | Substandard [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,619	2,919	'
Residential Real Estate [Member] | Doubtful [Member] | Covered Loan [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	0	'
Residential Real Estate [Member] | Doubtful [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	4	'
Consumer [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,889	2,061	'
Consumer [Member] | Performing [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,889	2,005	'
Consumer [Member] | Nonperforming [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	0	56	'
Mortgage Warehouse [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,006	9,565	'
Mortgage Warehouse [Member] | Performing [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	1,006	9,565	'
Mortgage Warehouse [Member] | Nonperforming [Member] | Non-covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Total loans receivable	$0	$0	'

Recovered_Sheet2

Loans Receivable and Allowance for Loan Losses - Schedule of Allowance for Loan Losses (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	$28,142	$16,118	$25,837	$15,032	'
Charge-offs	2,294	1,416	5,950	4,994	'
Recoveries	202	156	443	282	'
Provision for loan losses	750	10,116	6,470	14,654	'
Ending Balance	26,800	24,974	26,800	24,974	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	50,330	59,790	50,330	59,790	'
Collectively evaluated for impairment	1,961,639	906,580	1,961,639	906,580	'
Loans acquired with credit deterioration	87,759	126,650	87,759	126,650	'
Market discounts/premiums/valuation adjustments	59	-5,921	59	-5,921	'
Total	2,018,532	1,087,099	2,018,532	1,087,099	1,216,941
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	3,750	5,839	3,750	5,839	'
Collectively evaluated for impairment	12,536	8,316	12,536	8,316	'
Loans acquired with credit deterioration	10,514	10,819	10,514	10,819	'
Total Allowance for loan and lease losses	26,800	24,974	26,800	24,974	'
Commercial and Industrial [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	2,485	1,503	1,477	1,441	'
Charge-offs	1,311	266	1,407	300	'
Recoveries	16	98	181	164	'
Provision for loan losses	2,029	387	2,968	417	'
Ending Balance	3,219	1,722	3,219	1,722	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	20,162	4,558	20,162	4,558	'
Collectively evaluated for impairment	195,857	79,448	195,857	79,448	'
Loans acquired with credit deterioration	4,601	5,774	4,601	5,774	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	961	349	961	349	'
Collectively evaluated for impairment	1,991	877	1,991	877	'
Loans acquired with credit deterioration	267	496	267	496	'
Total Allowance for loan and lease losses	3,219	1,722	3,219	1,722	'
Commercial Real Estate [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	16,685	8,266	15,439	7,029	'
Charge-offs	851	283	2,742	1,426	'
Recoveries	186	33	246	83	'
Provision for loan losses	-349	5,923	2,728	8,253	'
Ending Balance	15,671	13,939	15,671	13,939	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	22,910	37,250	22,910	37,250	'
Collectively evaluated for impairment	1,449,009	543,772	1,449,009	543,772	'
Loans acquired with credit deterioration	48,634	70,915	48,634	70,915	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	2,233	2,787	2,233	2,787	'
Collectively evaluated for impairment	8,315	5,379	8,315	5,379	'
Loans acquired with credit deterioration	5,123	5,773	5,123	5,773	'
Total Allowance for loan and lease losses	15,671	13,939	15,671	13,939	'
Construction [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	4,317	4,352	3,991	4,656	'
Charge-offs	0	475	1,470	2,666	'
Recoveries	0	3	0	3	'
Provision for loan losses	-1,163	1,139	633	3,026	'
Ending Balance	3,154	5,019	3,154	5,019	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	3,978	13,169	3,978	13,169	'
Collectively evaluated for impairment	39,058	11,056	39,058	11,056	'
Loans acquired with credit deterioration	13,830	18,904	13,830	18,904	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	368	2,450	368	2,450	'
Collectively evaluated for impairment	241	262	241	262	'
Loans acquired with credit deterioration	2,545	2,307	2,545	2,307	'
Total Allowance for loan and lease losses	3,154	5,019	3,154	5,019	'
Residential Real Estate [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	3,552	1,080	3,233	844	'
Charge-offs	116	365	315	565	'
Recoveries	0	0	7	5	'
Provision for loan losses	-216	2,262	295	2,693	'
Ending Balance	3,220	2,977	3,220	2,977	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	3,205	4,540	3,205	4,540	'
Collectively evaluated for impairment	134,582	100,751	134,582	100,751	'
Loans acquired with credit deterioration	14,949	15,819	14,949	15,819	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	187	250	187	250	'
Collectively evaluated for impairment	1,115	878	1,115	878	'
Loans acquired with credit deterioration	1,918	1,849	1,918	1,849	'
Total Allowance for loan and lease losses	3,220	2,977	3,220	2,977	'
Manufactured Housing [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	678	40	750	18	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Provision for loan losses	1	858	-71	880	'
Ending Balance	679	898	679	898	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	140,869	150,876	140,869	150,876	'
Loans acquired with credit deterioration	5,189	13,113	5,189	13,113	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	80	757	80	757	'
Loans acquired with credit deterioration	599	141	599	141	'
Total Allowance for loan and lease losses	679	898	679	898	'
Consumer [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	106	75	154	61	'
Charge-offs	16	27	16	37	'
Recoveries	0	22	9	27	'
Provision for loan losses	13	279	-44	298	'
Ending Balance	103	349	103	349	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	75	273	75	273	'
Collectively evaluated for impairment	1,258	11,356	1,258	11,356	'
Loans acquired with credit deterioration	556	2,125	556	2,125	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	1	3	1	3	'
Collectively evaluated for impairment	40	93	40	93	'
Loans acquired with credit deterioration	62	253	62	253	'
Total Allowance for loan and lease losses	103	349	103	349	'
Mortgage Warehouse [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	56	802	71	929	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Provision for loan losses	-14	-732	-29	-859	'
Ending Balance	42	70	42	70	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	1,006	9,321	1,006	9,321	'
Loans acquired with credit deterioration	0	0	0	0	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	42	70	42	70	'
Loans acquired with credit deterioration	0	0	0	0	'
Total Allowance for loan and lease losses	42	70	42	70	'
Residual Reserve [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning Balance	263	0	722	54	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Provision for loan losses	449	0	-10	-54	'
Ending Balance	712	0	712	0	'
Loans:	'	'	'	'	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	0	0	0	0	'
Loans acquired with credit deterioration	0	0	0	0	'
Allowance for loan losses:	'	'	'	'	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	712	0	712	0	'
Loans acquired with credit deterioration	0	0	0	0	'
Total Allowance for loan and lease losses	$712	$0	$712	$0	'

Recovered_Sheet3

Loans Receivable and Allowance for Loan Losses - Schedule of Allowance for Loan Losses (Parenthetical) (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified
Receivables [Abstract]	'	'
Available funds for reimbursement	$2.90	$4.10

Recovered_Sheet4

Loans Receivable and Allowance for Loan Losses - Changes in Accretable Discount Related to Purchased Credit Impaired Loans (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Receivables [Abstract]	'	'	'	'
Accretable yield balance, beginning of period	$27,649	$43,230	$32,174	$45,358
Accretion to interest income	-1,362	-7,384	-5,034	-9,443
Reclassification from nonaccretable difference and disposals, net	-754	-147	-1,607	-216
Accretable yield balance, end of period	$25,533	$35,699	$25,533	$35,699

FDIC_Loss_Sharing_Receivable_A

FDIC Loss Sharing Receivable - Activity Related to FDIC Loss Sharing Receivable (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Banking and Thrift [Abstract]	'	'	'	'
Balance, beginning of period	$14,169	$12,376	$12,343	$13,077
Change in FDIC loss sharing receivable	-125	3,796	4,829	4,537
Reimbursement from the FDIC	3,006	3,866	-6,134	-5,308
Balance, end of period	$11,038	$12,306	$11,038	$12,306

Borrowings_Additional_Informat

Borrowings - Additional Information (Detail) (Five-year Senior Unsecured Notes [Member], USD $)	1 Months Ended
In Millions, unless otherwise specified	Jul. 31, 2013	Sep. 30, 2013	Aug. 31, 2013
Five-year Senior Unsecured Notes [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Senior unsecured notes	$55	'	$8.30
Senior unsecured notes, term	'5 years	'	'
Senior unsecured notes aggregate amount	'	63.25	'
Senior unsecured notes, interest rate	6.38%	'	'
Net proceeds from notes after issuance cost	$60.40	'	'

Shareholders_Equity_Additional

Shareholders' Equity - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended		1 Months Ended	3 Months Ended
	22-May-13	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	31-May-12	Sep. 30, 2012
					Class B Non-Voting Common Stock [Member]	Voting Common Stock [Member]	Common Stock [Member]	Common Stock [Member]
Capital Unit [Line Items]	'	'	'	'	'	'	'	'
Issuance of common stock under share-based-compensation arrangements	'	'	23,413	'	'	'	'	'
Shares issued upon exercise of outstanding warrants	'	'	'	'	31,904	'	'	'
Shares converted in to Voting common stock	'	'	'	'	3,700,000	'	'	'
Issuance of common stock (in shares)	6,179,104	'	'	'	'	'	'	7,111,819
Exercise price	$16.75	'	'	'	'	'	'	'
Net proceeds from issuance of common stock	$97,500,000	$94,800,000	$97,507,000	$94,762,000	'	'	'	'
Warrants to purchase	'	'	'	'	17,227	17,227	'	'
Costs related to this postponed offering	'	'	'	'	'	'	$1,400,000	'

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Options vesting period	'5 years
Percentage of increase in value options to purchase of voting common stock	50.00%
Term of options	'8 years 1 month 28 days
Chief Executive Officer [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Options to purchase shares of voting common stock	617,910
Representing number of shares issued percentage	10.00%
Chief Operating Officer [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Options to purchase shares of voting common stock	92,687
Representing number of shares issued percentage	1.50%
Chief Executive Officer and Chief Operating Officer [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Term of options	'10 years
Other Officers [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Options to purchase shares of voting common stock	70,000

ShareBased_Compensation_Statem

Share-Based Compensation - Statement of Weighted-Average Assumptions Used and Resulting Weighted-Average Fair Value of Option (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Weighted-average risk-free interest rate	1.41%	1.15%
Expected dividend yield	0.00%	0.00%
Weighted-average expected volatility	13.77%	17.47%
Expected life (in years)	'7 years	'6 years 11 months 23 days
Weighted-average fair value	$3.16	$3.04

ShareBased_Compensation_Summar

Share-Based Compensation - Summary of Stock Option Activity (Detail) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Number of Options, Outstanding beginning balance	2,003,889
Number of Options, Granted	780,597
Number of Options, Forfeited	-5,000
Number of Options, Outstanding ending balance	2,779,486
Number of Options, Vested and expected to vest	2,779,486
Number of Options, Exercisable	14,438
Weighted-average Exercise Price, Outstanding beginning balance	$12.49
Weighted-average Exercise Price, Granted	$16.67
Weighted-average Exercise Price, Forfeited	$14.94
Weighted-average Exercise Price, Outstanding ending balance	$13.66
Weighted-average Exercise Price, Vested and expected to vest	$13.66
Weighted-average Exercise Price, Exercisable	$20.06
Weighted-average Remaining Contractual Term in Years, Outstanding	'8 years 1 month 28 days
Weighted-average Remaining Contractual Term in Years, Vested and expected to vest	'8 years 1 month 28 days
Weighted-average Remaining Contractual Term in Years, Exercisable	'3 years 6 months 26 days
Aggregate Intrinsic Value, Outstanding	$7,480
Aggregate Intrinsic Value, Vested and expected to vest	7,480
Aggregate Intrinsic Value, Exercisable	$12

Regulatory_Matters_Additional_

Regulatory Matters - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Regulatory Capital Requirements [Abstract]	'
Maximum limit above the national rate for the interest rate paid for deposits	0.75%

Regulatory_Matters_Summary_of_

Regulatory Matters - Summary of Capital Amounts and Ratios (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Customers Bancorp, Inc. [Member]	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total capital (to risk weighted assets), Actual Amount	$413,900	$289,035
Tier 1 capital (to risk weighted assets), Actual Amount	386,517	262,719
Tier 1 capital (to average assets), Actual Amount	386,517	262,719
Total capital (to risk weighted assets), Actual Ratio	13.60%	11.26%
Tier 1 capital (to risk weighted assets), Actual Ratio	12.70%	10.23%
Tier 1 capital (to average assets), Actual Ratio	10.63%	9.30%
Total capital (to risk weighted assets), for Capital Adequacy Purposes Amount	243,500	205,443
Tier 1 capital (to risk weighted assets), for Capital Adequacy Purposes Amount	121,750	102,722
Tier 1 capital (to average assets), for Capital Adequacy Purposes Amount	145,388	112,939
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier 1 capital (to average assets), For Capital Adequacy Purposes Ratio	4.00%	4.00%
Customers Bank [Member]	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total capital (to risk weighted assets), Actual Amount	427,809	244,710
Tier 1 capital (to risk weighted assets), Actual Amount	400,426	218,394
Tier 1 capital (to average assets), Actual Amount	400,426	218,394
Total capital (to risk weighted assets), Actual Ratio	14.18%	9.53%
Tier 1 capital (to risk weighted assets), Actual Ratio	13.28%	8.50%
Tier 1 capital (to average assets), Actual Ratio	11.04%	7.74%
Total capital (to risk weighted assets), for Capital Adequacy Purposes Amount	241,298	205,442
Tier 1 capital (to risk weighted assets), for Capital Adequacy Purposes Amount	120,649	102,721
Tier 1 capital (to average assets), for Capital Adequacy Purposes Amount	145,043	112,896
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier 1 capital (to average assets), For Capital Adequacy Purposes Ratio	4.00%	4.00%
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	301,622	256,802
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	180,973	154,081
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$181,303	$141,120
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%	6.00%
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%

Disclosures_about_Fair_Value_o2

Disclosures about Fair Value of Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Loans held for sale, average life from purchase to sale	'17 days

Disclosures_about_Fair_Value_o3

Disclosures about Fair Value of Financial Instruments - Estimated Fair Values of Financial Instruments (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'
Cash and cash equivalents, Carrying Amount	$255,653	'	$186,016	$157,510	'	$73,570
Investment securities, available for sale, Carrying Amount	497,566	'	129,093	'	'	'
Loans held for sale, Carrying Amount	917,939	'	1,439,889	'	'	'
Loans receivable, net, Carrying Amount	2,072,987	'	1,298,630	'	'	'
FHLB, Federal Reserve Bank and other stock, Carrying Amount	19,113	'	30,163	'	'	'
FDIC loss sharing receivable, Carrying Amount	11,038	14,169	12,343	12,306	12,376	13,077
Derivatives not designated as hedging instruments, Assets Carrying Amount	1,911	'	'	'	'	'
Fraudulent loans receivable, Carrying Amount	669	'	'	'	'	'
Accrued interest receivable, Carrying Amount	7,866	'	5,790	'	'	'
Deposits, Carrying Amount	3,243,312	'	2,440,818	'	'	'
Federal funds purchased, Carrying Amount	0	'	5,000	'	'	'
Other borrowings, Carrying Amount	235,250	'	471,000	'	'	'
Subordinated debt, Carrying Amount	2,000	'	2,000	'	'	'
Derivatives not designated as hedging instruments, Liabilities, Carrying Amount	1,871	'	'	'	'	'
Accrued interest payable, Carrying Amount	1,761	'	1,530	'	'	'
Cash and cash equivalents, Fair Value	255,653	'	186,016	'	'	'
Investment securities, available for sale, Fair Value	497,566	'	129,093	'	'	'
Loans held for sale, Fair Value	917,939	'	1,439,889	'	'	'
Loans receivable, net, Fair Value	2,088,789	'	1,307,049	'	'	'
FHLB, Federal Reserve Bank and other stock, Fair Value	19,113	'	30,163	'	'	'
FDIC loss sharing receivable, Fair Value	11,038	'	12,343	'	'	'
Derivatives not designated as hedging instruments, Assets Fair Value	1,911	'	'	'	'	'
Fraudulent loans receivable, Fair Value	669	'	'	'	'	'
Accrued interest receivable, Fair Value	7,866	'	5,790	'	'	'
Deposits, Fair Value	3,247,129	'	2,674,765	'	'	'
Federal funds purchased, Fair Value	'	'	5,000	'	'	'
Other borrowings, Fair Value	238,251	'	471,432	'	'	'
Subordinated debt, Fair Value	2,000	'	2,000	'	'	'
Derivatives not designated as hedging instruments, Liabilities Fair Value	1,871	'	'	'	'	'
Accrued interest payable, Fair Value	1,761	'	1,530	'	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'
Cash and cash equivalents, Fair Value	255,653	'	186,016	'	'	'
Investment securities, available for sale, Fair Value	22,905	'	6	'	'	'
Loans held for sale, Fair Value	0	'	0	'	'	'
Loans receivable, net, Fair Value	0	'	0	'	'	'
FHLB, Federal Reserve Bank and other stock, Fair Value	0	'	0	'	'	'
FDIC loss sharing receivable, Fair Value	0	'	0	'	'	'
Derivatives not designated as hedging instruments, Assets Fair Value	0	'	'	'	'	'
Fraudulent loans receivable, Fair Value	0	'	'	'	'	'
Accrued interest receivable, Fair Value	7,866	'	5,790	'	'	'
Deposits, Fair Value	671,211	'	219,687	'	'	'
Federal funds purchased, Fair Value	'	'	5,000	'	'	'
Other borrowings, Fair Value	0	'	0	'	'	'
Subordinated debt, Fair Value	0	'	0	'	'	'
Derivatives not designated as hedging instruments, Liabilities Fair Value	0	'	'	'	'	'
Accrued interest payable, Fair Value	1,761	'	1,530	'	'	'
Significant Other Observable Inputs (Level 2) [Member]	'	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'
Cash and cash equivalents, Fair Value	0	'	0	'	'	'
Investment securities, available for sale, Fair Value	474,661	'	129,087	'	'	'
Loans held for sale, Fair Value	917,939	'	1,439,889	'	'	'
Loans receivable, net, Fair Value	0	'	0	'	'	'
FHLB, Federal Reserve Bank and other stock, Fair Value	19,113	'	30,163	'	'	'
FDIC loss sharing receivable, Fair Value	11,038	'	12,343	'	'	'
Derivatives not designated as hedging instruments, Assets Fair Value	1,911	'	'	'	'	'
Fraudulent loans receivable, Fair Value	0	'	'	'	'	'
Accrued interest receivable, Fair Value	0	'	0	'	'	'
Deposits, Fair Value	2,575,918	'	2,455,078	'	'	'
Federal funds purchased, Fair Value	'	'	0	'	'	'
Other borrowings, Fair Value	238,251	'	471,432	'	'	'
Subordinated debt, Fair Value	2,000	'	2,000	'	'	'
Derivatives not designated as hedging instruments, Liabilities Fair Value	1,871	'	'	'	'	'
Accrued interest payable, Fair Value	0	'	0	'	'	'
Significant Unobservable Inputs (Level 3) [Member]	'	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'
Cash and cash equivalents, Fair Value	0	'	0	'	'	'
Investment securities, available for sale, Fair Value	0	'	0	'	'	'
Loans held for sale, Fair Value	0	'	0	'	'	'
Loans receivable, net, Fair Value	2,088,789	'	1,307,049	'	'	'
FHLB, Federal Reserve Bank and other stock, Fair Value	0	'	0	'	'	'
FDIC loss sharing receivable, Fair Value	0	'	0	'	'	'
Derivatives not designated as hedging instruments, Assets Fair Value	0	'	'	'	'	'
Fraudulent loans receivable, Fair Value	669	'	'	'	'	'
Accrued interest receivable, Fair Value	0	'	0	'	'	'
Deposits, Fair Value	0	'	0	'	'	'
Federal funds purchased, Fair Value	'	'	0	'	'	'
Other borrowings, Fair Value	0	'	0	'	'	'
Subordinated debt, Fair Value	0	'	0	'	'	'
Derivatives not designated as hedging instruments, Liabilities Fair Value	0	'	'	'	'	'
Accrued interest payable, Fair Value	$0	'	$0	'	'	'

Disclosures_about_Fair_Value_o4

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 $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	$1,339,902	$1,378,028
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	18,109	16,741
Derivatives Not Designated as Hedging Instruments [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	1,911	'
Liabilities	'	'
Liabilities, Fair Value Disclosure, Recurring	1,871	'
Mortgage Warehouse Loans Held for Sale [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	840,425	1,248,935
Impaired Loans [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	7,850	11,004
Other Real Estate Owned [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	10,259	5,737
Available-for-sale Securities [Member] | Mortgage-backed Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	449,521	104,135
Available-for-sale Securities [Member] | Corporate Notes [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	25,140	24,952
Available-for-sale Securities [Member] | Equity Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	22,905	6
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	22,905	6
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	'
Liabilities	'	'
Liabilities, Fair Value Disclosure, Recurring	0	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mortgage Warehouse Loans Held for Sale [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Real Estate Owned [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Available-for-sale Securities [Member] | Corporate Notes [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Available-for-sale Securities [Member] | Equity Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	22,905	6
Significant Other Observable Inputs (Level 2) [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	1,316,997	1,378,022
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Significant Other Observable Inputs (Level 2) [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	1,911	'
Liabilities	'	'
Liabilities, Fair Value Disclosure, Recurring	1,871	'
Significant Other Observable Inputs (Level 2) [Member] | Mortgage Warehouse Loans Held for Sale [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	840,425	1,248,935
Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Significant Other Observable Inputs (Level 2) [Member] | Other Real Estate Owned [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Significant Other Observable Inputs (Level 2) [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	449,521	104,135
Significant Other Observable Inputs (Level 2) [Member] | Available-for-sale Securities [Member] | Corporate Notes [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	25,140	24,952
Significant Other Observable Inputs (Level 2) [Member] | Available-for-sale Securities [Member] | Equity Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Significant Unobservable Inputs (Level 3) [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	18,109	16,741
Significant Unobservable Inputs (Level 3) [Member] | Derivatives Not Designated as Hedging Instruments [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	'
Liabilities	'	'
Liabilities, Fair Value Disclosure, Recurring	0	'
Significant Unobservable Inputs (Level 3) [Member] | Mortgage Warehouse Loans Held for Sale [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	7,850	11,004
Significant Unobservable Inputs (Level 3) [Member] | Other Real Estate Owned [Member]	'	'
Assets	'	'
Assets, Fair Value Disclosure, Nonrecurring	10,259	5,737
Significant Unobservable Inputs (Level 3) [Member] | Available-for-sale Securities [Member] | Mortgage-backed Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Significant Unobservable Inputs (Level 3) [Member] | Available-for-sale Securities [Member] | Corporate Notes [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	0	0
Significant Unobservable Inputs (Level 3) [Member] | Available-for-sale Securities [Member] | Equity Securities [Member]	'	'
Available-for-sale securities:	'	'
Assets, Fair Value Disclosure, Recurring	$0	$0

Disclosures_about_Fair_Value_o5

Disclosures about Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Parenthetical) (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Specific reserves related to impaired loans	$3,750	$4,625
Impaired Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Specific reserves related to impaired loans	$3,750	$4,625

Disclosures_about_Fair_Value_o6

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) [Member], USD $)	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2013
			Mortgage-backed Securities [Member]	Mortgage-backed Securities [Member]	Corporate Notes [Member]	Corporate Notes [Member]	Loans Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'	'
Balance at beginning	$26,835	$22,111	$2,632	$2,894	$24,203	$19,217	$0
Total gains included in other comprehensive income (before taxes)	469	455	0	0	469	455	'
Amortization included in interest income	-29	-291	-29	-291	0	0	'
Settlements	-2,603	-2,603	-2,603	-2,603	0	0	'
Balance at ending	24,672	24,672	0	0	24,672	24,672	0
Transfer from Level 2 to Level 3	'	'	'	'	'	'	3,173
Recoveries	'	'	'	'	'	'	-1,463
Sales	'	'	'	'	'	'	-1,013
Transfer from loans held for sale to other assets	'	'	'	'	'	'	-697
Purchases	'	$5,000	'	$0	'	$5,000	'

Disclosures_about_Fair_Value_o7

Disclosures about Fair Value of Financial Instruments - Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Parenthetical) (Detail) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Mar. 31, 2013
					Significant Unobservable Inputs (Level 3) [Member]	Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Loan Held for Sale Exposed to Fraud	'	'	'	'	'	$5,200,000
Loan Held for Sale Range of possible loss, Minimum	'	'	'	'	'	1,500,000
Loan Held For Sale Range of possible loss, Maximum	'	'	'	'	'	3,200,000
Loss contingency provided by management	0	0	2,000,000	0	'	2,000,000
Loan held for sale not exposed to fraud	'	'	'	'	1,000,000	'
Loans recovered in cash from alleged perpetrator	'	'	'	'	1,500,000	'
Loans transferred to Other assets	'	'	'	'	2,700,000	'
Loans reserve transferred to Other assets	'	'	'	'	$2,000,000	'

Disclosures_about_Fair_Value_o8

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 $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified			Fair Value Estimate [Member]	Liquidation Expenses [Member]	Liquidation Expenses [Member]
				Impaired Loans [Member]	Other Real Estate Owned [Member]
				Collateral Appraisal [Member]	Collateral Appraisal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'
Impaired loans	'	'	$7,850	'	'
Other real estate owned	$13,601	$8,114	$10,259	'	'
Minimum	'	'	'	-3.00%	-3.00%
Maximum	'	'	'	-8.00%	-8.00%
Weighted Average	'	'	'	-5.50%	-5.50%

Derivative_Instruments_and_Hed2

Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified	Swap
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Number of interest rate swaps	16
Aggregate notional amount	$99.90
Termination value of derivatives in a net liability position	1.8
Minimum collateral with counterparties	$2.20

Derivative_Instruments_and_Hed3

Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments (Detail) (Interest Rate Swap Products [Member], USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Derivative Instruments, Gain (Loss) [Line Items]	'
Derivative Asset, Fair Value, Gross Asset	$177
Derivative Liability, Fair Value, Gross Liability	1,746
Derivatives Not Designated as Hedging Instruments [Member] | Other Assets [Member]	'
Derivative Instruments, Gain (Loss) [Line Items]	'
Derivative Asset, Fair Value, Gross Asset	1,911
Derivatives Not Designated as Hedging Instruments [Member] | Other Liabilities [Member]	'
Derivative Instruments, Gain (Loss) [Line Items]	'
Derivative Liability, Fair Value, Gross Liability	$1,871

Derivative_Instruments_and_Hed4

Derivative Instruments and Hedging Activities - Effect of Derivative Instruments on Comprehensive Income (Detail) (Other Non-Interest Income [Member], Interest Rate Swap Products [Member], USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Other Non-Interest Income [Member] | Interest Rate Swap Products [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Amount of loss recognized in income on derivatives	$38	'
Amount of gain recognized in income on derivatives	'	$236

Disclosures_about_Offsetting_A2

Disclosures about Offsetting Assets and Liabilities - Summary of Offsetting Financial Derivative Assets and Liabilities (Detail) (Interest Rate Swap Products [Member], USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Interest Rate Swap Products [Member]	'
Offsetting Assets [Line Items]	'
Gross amount of recognized assets	$177
Gross amounts offset in the consolidated balance sheet	0
Net amounts of assets presented in the consolidated balance sheet	177
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	177
Gross amounts not offset in the consolidated balance sheet, Cash collateral received	0
Net amount	0
Gross amount of recognized liabilities	1,746
Gross amounts offset in the consolidated balance sheet	0
Net amounts of liabilities presented in the consolidated balance sheet	1,746
Gross amounts not offset in the consolidated balance sheet, Financial instruments	177
Gross amounts not offset in the consolidated balance sheet, Cash collateral pledged	1,569
Net amount	$0

Loss_Contingency_Additional_In

Loss Contingency - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Mar. 31, 2013
					Significant Unobservable Inputs (Level 3) [Member]	Significant Unobservable Inputs (Level 3) [Member]
Loss Contingencies [Line Items]	'	'	'	'	'	'
Loan Held for Sale Exposed to Fraud	'	'	'	'	'	$5,200,000
Loan Held for Sale Range of possible loss, Minimum	'	'	'	'	'	1,500,000
Loan Held For Sale Range of possible loss, Maximum	'	'	'	'	'	3,200,000
Loss contingency provided by management	0	0	2,000,000	0	'	2,000,000
Loan held for sale not exposed to fraud	'	'	'	'	1,000,000	'
Loans recovered in cash from alleged perpetrator	'	'	'	'	1,500,000	'
Loans transferred to Other assets	'	'	'	'	2,700,000	'
Reserve transferred to Other assets	'	'	'	'	$2,000,000	'