Reorganization and Acquisition Activity - Additional Information (Detail) (USD $)	12 Months Ended				1 Months Ended						12 Months Ended		12 Months Ended		12 Months Ended			0 Months Ended			1 Months Ended						12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2012	Sep. 17, 2011	Sep. 30, 2011 Common Stock [Member]	Sep. 17, 2011 Common Stock [Member]	Sep. 17, 2011 Common Stock [Member] Outstanding Warrants [Member]	Sep. 17, 2011 Common Stock [Member] Warrants [Member]	Sep. 17, 2011 Common Stock [Member] Outstanding Stock Options [Member]	Sep. 17, 2011 Common Stock [Member] Stock Options [Member]	Dec. 31, 2013 The Customer Bancorp [Member]	Sep. 17, 2011 The Customer Bancorp [Member]	Dec. 31, 2012 Berkshire Bancorp [Member]	Sep. 17, 2011 Berkshire Bancorp [Member] Branch	Dec. 31, 2012 Berkshire Acquisition [Member]	Sep. 17, 2011 Berkshire Acquisition [Member]	Sep. 30, 2011 Tammac Holding [Member]	Jul. 24, 2012 Vanderbilt Mortgage and Finance Inc. [Member]	Dec. 20, 2013 CMS Bancorp Acquisition [Member]	Mar. 28, 2013 New England Commercial Lending Acquisition [Member] Office	Sep. 30, 2011 Class B Non-Voting Common Stock [Member]	Sep. 17, 2011 Class B Non-Voting Common Stock [Member]	Sep. 17, 2011 Class B Non-Voting Common Stock [Member] Outstanding Warrants [Member]	Sep. 17, 2011 Class B Non-Voting Common Stock [Member] Warrants [Member]	Sep. 17, 2011 Class B Non-Voting Common Stock [Member] Outstanding Stock Options [Member]	Sep. 17, 2011 Class B Non-Voting Common Stock [Member] Stock Options [Member]	Dec. 31, 2013 Series A Preferred Stock [Member] The Customer Bancorp [Member]	Sep. 17, 2011 Series A Preferred Stock [Member] The Customer Bancorp [Member]	Dec. 31, 2013 Series B Preferred Stock [Member] The Customer Bancorp [Member]	Sep. 17, 2011 Series B Preferred Stock [Member] The Customer Bancorp [Member]	Dec. 31, 2012 Cumulative Preferred Stock [Member] The Customer Bancorp [Member]
Capital Unit [Line Items]
Plan of Merger and Reorganization between the Bancorp and the Bank, effective date		Sep. 17, 2011
Common stock authorized issue	200,000,000		200,000,000			100,000,000																100,000,000
Preferred stock authorized issue	100,000,000		100,000,000	100,000,000
Business combination stock split ratio		One-for-three
Outstanding shares of common stock issued	24,224,151		18,459,502	22,525,825																		6,834,895
Outstanding common stock of Berkshire Bancorp					7,508,473								4,067,729								2,278,294
Common stock shares issued	24,756,411		18,507,121				1,410,732	470,260	2,572,404	855,774													243,102	81,036	231,500	77,166
Weighted-average exercise price							$ 3.55	$ 10.64	$ 3.50	$ 10.49													$ 3.50	$ 10.50	$ 4.00	$ 12.00
Termination fees																			$ 1,000,000
Commercial loan and related commitments acquired																				182,300,000
Acquired commercial loan and related commitments outstanding																				155,100,000
Purchase price as percentage of loans outstanding																				98.70%
Number of commercial lending offices																				2
Servicing of Berks County by Berkshire Bancorp Inc through branches of its subsidiary														5
BBI stock exchanged for shares of the Bancorp's stock															0.1534												1		1
Common stock issued upon acquisition												623,686
Recent price for sale of Customers Bancorp, Inc. common stock												$ 13.20
Total purchase price																11,300,000
Issuance of Cumulative Perpetual Preferred Stock																											2,892		145
Preferred stock, par value	$ 0		$ 0																									$ 1.00		$ 1.00
Preferred Stock liquidation value																												$ 1,000		$ 1,000
Cumulative dividend on Preferred Stock percentage																											5.00%		9.00%
Preferred Shares cumulative dividend paid to treasury																															218,000
Increase in goodwill due to fair value adjustment	1,200,000
Increase in deferred tax assets due to fair value adjustment	1,600,000
Decrease in Other Real Estate Owned due to fair value adjustment	1,400,000
Decrease in loan receivable not covered with FDIC due to fair value adjustment	1,400,000
Write-off of acquired net operating loss	626,000
Warrants to purchase common stock												118,853		774,571
Warrants to purchase common stock exercise price range minimum											$ 21.38
Warrants to purchase common stock exercise price range maximum											$ 73.01
Warrant extension period											5 years
Expiry date of warrants											Sep. 17, 2016
Value of purchased manufactured housing loan portfolio																	19,300,000	63,200,000
Interest on strip security																	1.50%
Estimated value of strip security																	3,000,000
Secured pool amount of loans originated																	70,000,000
Purchase price of manufactured housing loan portfolio																	$ 13,000,000
Percentage of loans associated with real estate																		15.00%
Percentage of loans associated with chattel																		85.00%
Coupon rate of loan																		11.30%
Earning on servicing fee																		2.00%
Retention rights of loan																		2.00%