Securities - Fair Value and Age of Gross Unrealized Losses by Investment Category (Details) $ in Thousands	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Number of Securities
Less Than 12 Months | security	30	3
12 Months or More | security	1	0
Total | security	31	3
Fair Value
Less Than 12 Months	$ 372,499	$ 36,196
12 Months or More	8,933	0
Total	381,432	36,196
Unrealized Losses
Less Than 12 Months	(5,393)	(90)
12 Months or More	(374)	0
Total	$ (5,767)	$ (90)
U.S. Treasury securities
Number of Securities
Less Than 12 Months | security	8	0
12 Months or More | security	0	0
Total | security	8	0
Fair Value
Less Than 12 Months	$ 85,221	$ 0
12 Months or More	0	0
Total	85,221	0
Unrealized Losses
Less Than 12 Months	(742)	0
12 Months or More	0	0
Total	$ (742)	$ 0
Collateralized mortgage obligations of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	12	2
12 Months or More | security	1	0
Total | security	13	2
Fair Value
Less Than 12 Months	$ 141,204	$ 35,697
12 Months or More	8,933	0
Total	150,137	35,697
Unrealized Losses
Less Than 12 Months	(2,436)	(89)
12 Months or More	(374)	0
Total	$ (2,810)	$ (89)
Residential mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	3	0
12 Months or More | security	0	0
Total | security	3	0
Fair Value
Less Than 12 Months	$ 46,042	$ 0
12 Months or More	0	0
Total	46,042	0
Unrealized Losses
Less Than 12 Months	(628)	0
12 Months or More	0	0
Total	$ (628)	$ 0
Commercial mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	7
12 Months or More | security	0	0
Total | security	7	0
Fair Value
Less Than 12 Months	$ 100,032
12 Months or More	0	0
Total	100,032	0
Unrealized Losses
Less Than 12 Months	(1,587)
12 Months or More	0	0
Total	$ (1,587)	$ 0
Corporate Obligations
Number of Securities
Less Than 12 Months | security	0	1
12 Months or More | security	0	0
Total | security	0	1
Fair Value
Less Than 12 Months	$ 0	$ 499
12 Months or More	0	0
Total	0	499
Unrealized Losses
Less Than 12 Months	0	(1)
12 Months or More	0	0
Total	$ 0	$ (1)