Minimum Regulatory Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2023

Banking and Thrift, Interest [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The Company’s actual capital amounts and ratios are presented in the following table as of the dates indicated:

	Actual				For Capital Adequacy				To Be Well- Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in thousands)
As of December 31, 2023
Total regulatory capital (to risk-weighted assets)	$	3,187,130	19.55	%	$	1,304,508	≥8	%	$	1,630,634	≥10	%
Common equity Tier 1 capital (to risk-weighted assets)	3,024,288		18.55		733,785		≥4.5		1,059,912		≥6.5
Tier 1 capital (to risk-weighted assets)	3,024,288		18.55		978,381		≥6		1,304,508		≥8
Tier 1 capital (to average assets) leverage	3,024,288		14.00		864,206		≥4		1,080,258		≥5
As of December 31, 2022
Total regulatory capital (to risk-weighted assets)	$	2,906,742	17.89	%	$	1,299,657	≥8	%	$	1,624,571	≥10	%
Common equity Tier 1 capital (to risk-weighted assets)	2,751,694		16.94		731,057		≥4.5		1,055,971		≥6.5
Tier 1 capital (to risk-weighted assets)	2,751,694		16.94		974,743		≥6		1,299,657		≥8
Tier 1 capital (to average assets) leverage	2,751,694		12.03		915,233		≥4		1,144,041		≥5