Debt Securities Held to Maturity - Narrative (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) security	Mar. 31, 2021 USD ($) security	Dec. 31, 2021 USD ($) security
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 419,033,000		$ 429,734,000
Fair Value	399,024,000		434,789,000
Proceeds from sale of held-to-maturity securities	0	$ 0
Debt securities, held-to-maturity, number of called debt securities | security		1
Proceeds from sale and maturity of held-to-maturity securities		$ 5,000,000
Debt securities, held-to-maturity, sold, realized gain (loss)		$ 0
Fair value of securities sold under agreements to repurchase	$ 241,100,000		$ 252,400,000
Number of positions | security	95		25
Accrued interest receivable on debt securities held-to-maturity	$ 832,000
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	374,162,000		$ 384,864,000
Fair Value	$ 357,511,000		$ 390,678,000