Debt Securities Held to Maturity - Continuous Unrealized Loss Position on Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value
Less Than 12 Months	$ 359,502	$ 123,147
12 Months or Longer	33,439	0
Total	392,941	123,147
Gross Unrealized (Losses)
Less Than 12 Months	(27,761)	(1,686)
12 Months or Longer	(5,098)	0
Total	(32,859)	(1,686)
U.S. government and agency obligations
Fair Value
Less Than 12 Months	21,752	44,111
12 Months or Longer	17,590	0
Total	39,342	44,111
Gross Unrealized (Losses)
Less Than 12 Months	(3,122)	(759)
12 Months or Longer	(2,406)	0
Total	(5,528)	(759)
Mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	337,750	79,036
12 Months or Longer	15,849	0
Total	353,599	79,036
Gross Unrealized (Losses)
Less Than 12 Months	(24,639)	(927)
12 Months or Longer	(2,692)	0
Total	$ (27,331)	$ (927)