Securities - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) item security	Dec. 31, 2021 USD ($)
Additional Information
The number of holdings of securities of any one issuer other than the U.S. Government and its sponsored entities | security	0
Holdings of securities as percentage of shareholders' equity, considered as threshold for disclosure purpose	10.00%
Number of securities held | item	463
Number of available for sale securities held | item	173
Number of held to maturity securities held | item	290
Number of securities with fair values below amortized cost | item	439
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 489,596,000
Debt Securities, Held-to-Maturity, Continuous Unrealized Losses Position, Less than 12 Months, Fair Value	167,271,000	$ 408,856,000
Debt Securities, Held-to-Maturity, Continuous Unrealized Losses Position, 12 Months or Longer, Fair Value	429,257,000	27,997,000
Total unrealized loss for securities carried less than 12 months	(29,802,000)
Total unrealized loss for securities carried for 12 months or more	(87,111,000)
Agency mortgage-backed securities
Additional Information
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	71,122,000
Debt Securities, Held-to-Maturity, Continuous Unrealized Losses Position, Less than 12 Months, Fair Value	136,264,000	408,856,000
Debt Securities, Held-to-Maturity, Continuous Unrealized Losses Position, 12 Months or Longer, Fair Value	429,257,000	$ 27,997,000
U.S. Treasury
Additional Information
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	418,474,000
Municipals - exempt from Federal tax
Additional Information
Debt Securities, Held-to-Maturity, Continuous Unrealized Losses Position, Less than 12 Months, Fair Value	$ 31,007,000