Investment Securities - Additional Information (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) Security	Dec. 31, 2023 USD ($) Security
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Number of securities in unrealized loss positions, twelve months or more | Security	83	97
Available for sale securities unrealized aggregate loss	$ 8,352	$ 11,351
Available-for-sale investment securities aggregate, amortized historical cost	279,000
Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost	$ 7,000	$ 10,200
Available-for-sale investment securities aggregate fair value and amortized historical cost percentage	(2.50%)	(3.80%)
Available-for-sale investment securities decline in fair value and amortized historical cost	$ 3,200
Held-to-maturity Securities [Abstract]
Available For Sale Securities Continuous Unrealized Loss Position Greater Than Twelve Months Amortized Historical Cost Basis		$ 269,000
Gain (Loss) on Sale of Investments [Abstract]
Securities pledged to collateralize deposit	126,700	110,300
Securities pledged to collateralize borrowing	108,900	$ 114,300
Aggregate fair value	$ 4,900
State and Political Subdivisions [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Number of securities in unrealized loss positions, twelve months or more | Security	20	20
Available for sale securities unrealized aggregate loss	$ 1,286	$ 1,809
Held-to-maturity Securities [Abstract]
Number of securities in unrealized loss positions, twelve months or more | Security	17	14
Debt Securities [Member]
Held-to-maturity Securities [Abstract]
Number of securities in unrealized loss positions, twelve months or more | Security	114	123
Held-to-Maturity Securities [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis	$ 161,600	$ 179,600
Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost	$ 6,700	$ 11,600
Available-for-sale investment securities aggregate fair value and amortized historical cost percentage	(4.10%)	(6.50%)