Subordinated Debentures - Outstanding Subordinated Debentures (Details) - USD ($)	1 Months Ended		12 Months Ended
	Jun. 30, 2020	May 31, 2019	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Aug. 31, 2014
Debt Instrument [Line Items]
Carrying Value			$ 331,204,000	$ 330,567,000
Subordinated notes
Debt Instrument [Line Items]
Face amount of debt instrument			335,000,000		$ 25,000,000
Carrying Value			$ 331,204,000	330,567,000
Subordinated notes | Subordinated notes due 2024, 5.75% per annum
Debt Instrument [Line Items]
Fixed interest rate (as a percent)			5.75%			5.75%
Current Interest Rate (as a percent)			5.75%
Face amount of debt instrument			$ 60,000,000			$ 60,000,000
Carrying Value			$ 59,791,000	59,671,000
Subordinated notes | Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter
Debt Instrument [Line Items]
Fixed interest rate (as a percent)		4.875%	4.875%
Current Interest Rate (as a percent)			4.875%
Face amount of debt instrument		$ 125,000,000	$ 125,000,000
Carrying Value			$ 123,386,000	123,132,000
Subordinated notes | Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR +4.9% thereafter | LIBOR
Debt Instrument [Line Items]
Variable rate (as a percent)		2.50%	4.90%
Subordinated notes | Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter
Debt Instrument [Line Items]
Fixed interest rate (as a percent)			5.375%
Current Interest Rate (as a percent)			5.375%
Face amount of debt instrument	$ 150,000,000		$ 150,000,000
Carrying Value			$ 148,027,000	$ 147,764,000
Subordinated notes | Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month SOFR +5.17% thereafter | SOFR
Debt Instrument [Line Items]
Variable rate (as a percent)	5.17%		0.0517%