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Regulatory Capital (Tables)

9 Months Ended

Sep. 30, 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 as 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 September 30, 2023:
Common equity Tier 1 capital (to risk-weighted assets)
Customers Bancorp, Inc.			$	1,596,157					11.305		%				$	635,353					4.500		%				N/A						N/A						$	988,327					7.000		%
Customers Bank			$	1,830,143					12.974		%				$	634,762					4.500		%				$	916,878					6.500		%				$	987,408					7.000		%
Tier 1 capital (to risk-weighted assets)
Customers Bancorp, Inc.			$	1,733,950					12.281		%				$	847,137					6.000		%				N/A						N/A						$	1,200,111					8.500		%
Customers Bank			$	1,830,143					12.974		%				$	846,349					6.000		%				$	1,128,466					8.000		%				$	1,198,995					8.500		%
Total capital (to risk-weighted assets)
Customers Bancorp, Inc.			$	2,015,526					14.275		%				$	1,129,516					8.000		%				N/A						N/A						$	1,482,490					10.500		%
Customers Bank			$	2,038,998					14.455		%				$	1,128,466					8.000		%				$	1,410,582					10.000		%				$	1,481,111					10.500		%
Tier 1 capital (to average assets)
Customers Bancorp, Inc.			$	1,733,950					7.805		%				$	888,675					4.000		%				N/A						N/A						$	888,675					4.000		%
Customers Bank			$	1,830,143					8.246		%				$	887,727					4.000		%				$	1,109,658					5.000		%				$	887,727					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		%