Debt Securities Held to Maturity - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Mortgage-backed securities and collateralized mortgage obligations, amortized cost	$ 384,864,000
Morgtage-backed securities and collateralized mortgage obligations, fair value	390,678,000
Proceeds from sale of held-to-maturity securities	0	$ 0	$ 0
Proceeds from calls and maturities of debt securities held to maturity	5,100,000	20,000,000	33,400,000
Debt securities, held-to-maturity, realized gain (loss)	0	0
Debt securities, held-to-maturity, sold, realized gain			24,000
Debt securities, held-to-maturity, sold, realized loss			0
Securities available-for-sale sold under agreements	$ 252,400,000	$ 220,500,000
Number of unrealized loss positions | security	25	2
Other-than-temporary impairment loss, debt securities, held-to-maturity, before tax	$ 0	$ 0	$ 0