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Regulatory Capital (Tables) | 12 Months Ended
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Dec. 31, 2023
Regulatory Capital [Abstract] |
Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios | Generally, to comply with the regulatory definition of adequately capitalized, or well capitalized, respectively, or to comply with the Basel III capital requirements, an institution must at least maintain the common equity Tier 1, Tier 1 and total risk-based capital ratios and the Tier 1 leverage ratio in excess of the related minimum ratios set forth in the following table:
|  |  |  |  | Minimum Capital Levels to be Classified as:
| Actual |  | Adequately Capitalized |  | Well Capitalized |  | Basel III Compliant
(dollars in thousands) | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
As of December 31, 2023: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common equity Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 1,661,149 |  |  | 12.230 | % |  | $ | 611,200 |  |  | 4.500 | % |  | N/A |  | N/A |  | $ | 950,755 |  |  | 7.000 | %
Customers Bank | $ | 1,868,360 |  |  | 13.773 | % |  | $ | 610,453 |  |  | 4.500 | % |  | $ | 881,765 |  |  | 6.500 | % |  | $ | 949,594 |  |  | 7.000 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 1,798,942 |  |  | 13.245 | % |  | $ | 814,933 |  |  | 6.000 | % |  | N/A |  | N/A |  | $ | 1,154,489 |  |  | 8.500 | %
Customers Bank | $ | 1,868,360 |  |  | 13.773 | % |  | $ | 813,937 |  |  | 6.000 | % |  | $ | 1,085,250 |  |  | 8.000 | % |  | $ | 1,153,078 |  |  | 8.500 | %
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 2,076,550 |  |  | 15.289 | % |  | $ | 1,086,578 |  |  | 8.000 | % |  | N/A |  | N/A |  | $ | 1,426,133 |  |  | 10.500 | %
Customers Bank | $ | 2,073,202 |  |  | 15.283 | % |  | $ | 1,085,250 |  |  | 8.000 | % |  | $ | 1,356,562 |  |  | 10.000 | % |  | $ | 1,424,390 |  |  | 10.500 | %
Tier 1 capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 1,798,942 |  |  | 8.375 | % |  | $ | 859,189 |  |  | 4.000 | % |  | N/A |  | N/A |  | $ | 859,189 |  |  | 4.000 | %
Customers Bank | $ | 1,868,360 |  |  | 8.708 | % |  | $ | 858,225 |  |  | 4.000 | % |  | $ | 1,072,782 |  |  | 5.000 | % |  | $ | 858,225 |  |  | 4.000 | %
As of December 31, 2022: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common equity Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 1,470,837 |  |  | 9.637 | % |  | $ | 686,838 |  |  | 4.500 | % |  | N/A |  | N/A |  | $ | 1,068,415 |  |  | 7.000 | %
Customers Bank | $ | 1,708,598 |  |  | 11.213 | % |  | $ | 685,694 |  |  | 4.500 | % |  | $ | 990,447 |  |  | 6.500 | % |  | $ | 1,066,636 |  |  | 7.000 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 1,608,630 |  |  | 10.539 | % |  | $ | 915,784 |  |  | 6.000 | % |  | N/A |  | N/A |  | $ | 1,297,361 |  |  | 8.500 | %
Customers Bank | $ | 1,708,598 |  |  | 11.213 | % |  | $ | 914,259 |  |  | 6.000 | % |  | $ | 1,219,012 |  |  | 8.000 | % |  | $ | 1,295,201 |  |  | 8.500 | %
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 1,862,089 |  |  | 12.200 | % |  | $ | 1,221,045 |  |  | 8.000 | % |  | N/A |  | N/A |  | $ | 1,602,622 |  |  | 10.500 | %
Customers Bank | $ | 1,889,472 |  |  | 12.400 | % |  | $ | 1,219,012 |  |  | 8.000 | % |  | $ | 1,523,765 |  |  | 10.000 | % |  | $ | 1,599,954 |  |  | 10.500 | %
Tier 1 capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers Bancorp, Inc. | $ | 1,608,630 |  |  | 7.664 | % |  | $ | 839,547 |  |  | 4.000 | % |  | N/A |  | N/A |  | $ | 839,547 |  |  | 4.000 | %
Customers Bank | $ | 1,708,598 |  |  | 8.150 | % |  | $ | 838,611 |  |  | 4.000 | % |  | $ | 1,048,264 |  |  | 5.000 | % |  | $ | 838,611 |  |  | 4.000 | %

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
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