Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2015

Banking and Thrift [Abstract]

Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios

To be categorized as well capitalized, an institution must maintain minimum common equity Tier 1, total risk based, Tier 1 risk based and Tier 1 leveraged ratios as set forth in the following table:

	Actual				For Capital Adequacy Purposes				To Be Well Capitalized Under Prompt Corrective Action Provisions
(amounts in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2015
Common equity Tier 1 (to risk-weighted assets)
Customers Bancorp, Inc.	$	500,624	7.61	%	$	296,014	4.5	%	N/A		N/A
Customers Bank	$	565,217	8.62	%	$	294,916	4.5	%	$	425,990	6.5	%
Total capital (to risk-weighted assets)
Customers Bancorp, Inc.	$	698,323	10.62	%	$	526,247	8.0	%	N/A		N/A
Customers Bank	$	710,864	10.85	%	$	524,295	8.0	%	$	655,369	10.0	%
Tier 1 capital (to risk-weighted assets)
Customers Bancorp, Inc.	$	556,193	8.46	%	$	394,685	6.0	%	N/A		N/A
Customers Bank	$	565,217	8.62	%	$	393,221	6.0	%	$	524,295	8.0	%
Tier 1 capital (to average assets)
Customers Bancorp, Inc.	$	556,193	7.16	%	$	310,812	4.0	%	N/A		N/A
Customers Bank	$	565,217	7.30	%	$	309,883	4.0	%	$	387,353	5.0	%
December 31, 2014
Total capital (to risk-weighted assets)
Customers Bancorp, Inc.	$	578,644	11.09	%	$	417,473	8.0	%	N/A		N/A
Customers Bank	$	621,894	11.98	%	$	415,141	8.0	%	$	518,926	10.0	%
Tier 1 capital (to risk-weighted assets)
Customers Bancorp, Inc.	$	437,712	8.39	%	$	208,737	4.0	%	N/A		N/A
Customers Bank	$	480,963	9.27	%	$	207,570	4.0	%	$	311,356	6.0	%
Tier 1 capital (to average assets)
Customers Bancorp, Inc.	$	437,712	6.69	%	$	261,622	4.0	%	N/A		N/A
Customers Bank	$	480,963	7.39	%	$	260,462	4.0	%	$	325,577	5.0	%