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Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2021
Regulatory Matters  
Schedule of regulatory capital requirements under banking regulations
The actual capital amounts and ratios for the Company and Bank as of December 31, 2021 and 2020 are presented in the table below:
CompanyBankMinimum Required
For Capital
Adequacy Purposes		To Be Well
Capitalized
Under Prompt
Corrective Action
Regulations *
(dollars in thousands)Actual
Amount		RatioActual
Amount		Ratio
As of December 31, 2021            
CET1 capital (to risk weighted assets)$1,269,329 15.02 %$1,261,518 15.01 %7.000 %6.5 %
Total capital (to risk weighted assets)1,365,117 16.15 %1,329,306 15.82 %10.500 %10.0 %
Tier 1 capital (to risk weighted assets)1,269,329 15.02 %1,261,518 15.01 %8.500 %8.0 %
Tier 1 capital (to average assets)1,269,329 10.19 %1,261,518 10.16 %4.000 %5.0 %
As of December 31, 2020
CET1 capital (to risk weighted assets)$1,137,896 13.49 %$1,244,028 14.90 %7.000 %6.5 %
Total capital (to risk weighted assets)1,438,224 17.04 %1,338,356 16.03 %10.500 %10.0 %
Tier 1 capital (to risk weighted assets)1,137,896 13.49 %1,244,028 14.90 %8.500 %8.0 %
Tier 1 capital (to average assets)1,137,896 10.31 %1,244,028 11.29 %4.000 %5.0 %
*    Applies to Bank only