Debt Securities Held to Maturity - Continuous Unrealized Loss Position on Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value
Less Than 12 Months	$ 327,084	$ 123,147
12 Months or Longer	46,409	0
Total	373,493	123,147
Gross Unrealized (Losses)
Less Than 12 Months	(41,431)	(1,686)
12 Months or Longer	(10,152)	0
Total	(51,583)	(1,686)
U.S. government and agency obligations
Fair Value
Less Than 12 Months	4,967	44,111
12 Months or Longer	37,316	0
Total	42,283	44,111
Gross Unrealized (Losses)
Less Than 12 Months	(32)	(759)
12 Months or Longer	(7,555)	0
Total	(7,587)	(759)
Mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	322,117	79,036
12 Months or Longer	9,093	0
Total	331,210	79,036
Gross Unrealized (Losses)
Less Than 12 Months	(41,399)	(927)
12 Months or Longer	(2,597)	0
Total	$ (43,996)	$ (927)