Debt Securities Available for Sale - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities and collateralized mortgage obligations, amortized cost	$ 1,351,929,000
Mortgage-backed securities and collateralized mortgage obligations, fair value	1,181,727,000
Proceeds from sales of debt securities available for sale	126,772,000	$ 90,339,000	$ 20,761,000
Debt securities, available-for-sale securities, gross realized gains	710,000	2,100,000	369,000
Debt securities, available-for-sale, realized loss	500,000	439,000	0
Proceeds from calls of debt securities available for sale	0	14,000,000	11,600,000
Proceeds from maturities of debt securities, available-for-sale	915,000	210,000	10,900,000
Calls of debt securities, available-for-sale, realized gain		0	1,000
Calls of debt securities, available-for-sale, unrealized loss		0	$ 0
Debt securities, available-for-sale, restricted	$ 724,000,000	$ 587,700,000
Number of unrealized loss positions | security	455	219
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable
Accrued interest receivable on debt securities available for sale	$ 3,200,000
Subsidiaries
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, restricted	$ 28,300,000	$ 44,100,000