Minimum Regulatory Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2022

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:

	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, 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
As of December 31, 2021
Total regulatory capital (to risk-weighted assets)	$	2,939,016	19.77	%	$	1,189,466	>8	%	$	1,486,832	>10	%
Common equity Tier 1 capital (to risk-weighted assets)	2,831,102		19.04		669,075		4.5		966,441		6.5
Tier 1 capital (to risk-weighted assets)	2,831,102		19.04		892,099		6		1,189,466		8
Tier 1 capital (to average assets) leverage	2,831,102		13.96		811,000		4		1,013,750		5