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Regulatory Capital (Tables)
 3 Months Ended
Mar. 31, 2018
Banking and Thrift [Abstract]  
Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios
Generally, to comply with the regulatory definition of adequately capitalized, or well capitalized, respectively, an institution must at least maintain the common equity Tier 1, Tier 1 and total risk-based capital ratios and the Tier 1 leverage ratio in excess of the related minimum ratios as set forth in the following table:
 
 
 
 
 
Minimum Capital Levels to be Classified as:
 
Actual
 
Adequacy Capitalized
 
Well Capitalized
 
Basel III Compliant
(amounts in thousands)
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
As of March 31, 2018:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common equity Tier 1 capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
710,156

 
8.508
%
 
$
375,609

 
4.500
%
 
N/A

 
N/A

 
$
532,113

 
6.375
%
Customers Bank
$
1,037,480

 
12.448
%
 
$
375,048

 
4.500
%
 
$
541,736

 
6.500
%
 
$
531,318

 
6.375
%
Tier 1 capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
927,627

 
11.113
%
 
$
500,812

 
6.000
%
 
N/A

 
N/A

 
$
657,316

 
7.875
%
Customers Bank
$
1,037,480

 
12.448
%
 
$
500,064

 
6.000
%
 
$
666,751

 
8.000
%
 
$
656,333

 
7.875
%
Total capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
1,047,698

 
12.552
%
 
$
667,749

 
8.000
%
 
N/A

 
N/A

 
$
824,253

 
9.875
%
Customers Bank
$
1,186,105

 
14.231
%
 
$
666,751

 
8.000
%
 
$
833,439

 
10.000
%
 
$
823,021

 
9.875
%
Tier 1 capital (to average assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
927,627

 
9.031
%
 
$
410,858

 
4.000
%
 
N/A

 
N/A

 
$
410,858

 
4.000
%
Customers Bank
$
1,037,480

 
10.107
%
 
$
410,612

 
4.000
%
 
$
513,265

 
5.000
%
 
$
410,612

 
4.000
%
As of December 31, 2017:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common equity Tier 1 capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
689,494

 
8.805
%
 
$
352,368

 
4.500
%
 
N/A

 
N/A

 
$
450,248

 
5.750
%
Customers Bank
$
1,023,564

 
13.081
%
 
$
352,122

 
4.500
%
 
$
508,621

 
6.500
%
 
$
449,934

 
5.750
%
Tier 1 capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
906,963

 
11.583
%
 
$
469,824

 
6.000
%
 
N/A

 
N/A

 
$
567,704

 
7.250
%
Customers Bank
$
1,023,564

 
13.081
%
 
$
469,496

 
6.000
%
 
$
625,994

 
8.000
%
 
$
567,307

 
7.250
%
Total capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
1,021,601

 
13.047
%
 
$
626,432

 
8.000
%
 
N/A

 
N/A

 
$
724,313

 
9.250
%
Customers Bank
$
1,170,666

 
14.961
%
 
$
625,994

 
8.000
%
 
$
782,493

 
10.000
%
 
$
723,806

 
9.250
%
Tier 1 capital (to average assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Customers Bancorp, Inc.
$
906,963

 
8.937
%
 
$
405,949

 
4.000
%
 
N/A

 
N/A

 
$
405,949

 
4.000
%
Customers Bank
$
1,023,564

 
10.092
%
 
$
405,701

 
4.000
%
 
$
507,126

 
5.000
%
 
$
405,701

 
4.000
%