Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) shares in Millions	1 Months Ended		12 Months Ended
	Aug. 31, 2017	Jun. 30, 2015	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Loss on extinguishment of debt			$ 0	$ 8,406,000	$ 12,036,000
Forecast period			2 years
Historical loss experience period			1 year
OREO and other repossessed assets total			$ 286,000	2,300,000
Foreclosed residential real estate properties			0	0
Properties for which formal foreclosure proceedings are in process			$ 2,600,000	$ 2,500,000
Award vesting period			1 year
Anti-dilutive common stock options and warrants (in shares)			0.0	0.0	1.7
Noncumulative Preferred Stock
Summary Of Significant Accounting Policies [Line Items]
Common stock issued (in shares)	4.0	4.6
Residential mortgage and home equity
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be full or partial charged-off			120 days
Automobile
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be fully charged-off			120 days
Unsecured loans at banks
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be fully charged-off			150 days
Minimum
Summary Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life			3 years
Minimum | Commitments under commercial loans and lines of credit
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be full or partial charged-off			90 days
Maximum
Summary Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life			40 years
Maximum | Commitments under commercial loans and lines of credit
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be full or partial charged-off			120 days