Securities - Held to Maturity Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 118,175	$ 58,127
Gross Unrealized Gains	1,643	2,987
Gross Unrealized Loss	(741)	0
Estimated Fair Value	119,077	61,114
U.S. government agency debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	66,307	28,676
Gross Unrealized Gains	62	809
Gross Unrealized Loss	(363)	0
Estimated Fair Value	66,006	29,485
U.S. government sponsored enterprise debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	51,868	29,451
Gross Unrealized Gains	1,581	2,178
Gross Unrealized Loss	(378)	0
Estimated Fair Value	53,071	31,629
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	89,400	28,700
Estimated Fair Value	88,700	29,500
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	28,800	29,500
Estimated Fair Value	$ 30,400	$ 31,600

Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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