Securities - Securities Held to Maturity (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	$ 344,220,000		$ 353,988,000
Debt securities, held-to-maturity, transferred unrealized loss	17,828,000		19,503,000
Debt securities, held-to-maturity, allowance for credit loss	155,000	$ 155,000	157,000	$ 160,000	$ 160,000	$ 168,000
Total securities held-to-maturity, amortized cost	362,203,000		373,648,000
Debt securities, held-to-maturity, unrealized gains	10,000		868,000
Debt securities, held-to-maturity, unrealized losses	56,559,000		55,910,000
Debt securities, held-to-maturity, fair value	305,654,000		318,606,000
U.S. agency
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	24,960,000		25,768,000
Debt securities, held-to-maturity, transferred unrealized loss	1,502,000		1,603,000
Debt securities, held-to-maturity, allowance for credit loss	0		0
Total securities held-to-maturity, amortized cost	26,462,000		27,371,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	4,979,000		4,892,000
Debt securities, held-to-maturity, fair value	21,483,000		22,479,000
U.S. agency residential mortgage-backed
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	105,040,000		108,770,000
Debt securities, held-to-maturity, transferred unrealized loss	9,209,000		9,715,000
Debt securities, held-to-maturity, allowance for credit loss	0		0
Total securities held-to-maturity, amortized cost	114,249,000		118,485,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	24,485,000		23,849,000
Debt securities, held-to-maturity, fair value	89,764,000		94,636,000
U.S. agency commercial mortgage-backed
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	4,083,000		4,146,000
Debt securities, held-to-maturity, transferred unrealized loss	130,000		153,000
Debt securities, held-to-maturity, allowance for credit loss	0		0
Total securities held-to-maturity, amortized cost	4,213,000		4,299,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	431,000		460,000
Debt securities, held-to-maturity, fair value	3,782,000		3,839,000
Private label mortgage-backed
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	7,331,000		7,302,000
Debt securities, held-to-maturity, transferred unrealized loss	246,000		302,000
Debt securities, held-to-maturity, allowance for credit loss	4,000	4,000	4,000	1,000	1,000	1,000
Total securities held-to-maturity, amortized cost	7,581,000		7,608,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	772,000		854,000
Debt securities, held-to-maturity, fair value	6,809,000		6,754,000
Obligations of states and political subdivisions
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	156,025,000		161,352,000
Debt securities, held-to-maturity, transferred unrealized loss	6,047,000		6,879,000
Debt securities, held-to-maturity, allowance for credit loss	31,000	31,000	33,000	39,000	39,000	39,000
Total securities held-to-maturity, amortized cost	162,103,000		168,264,000
Debt securities, held-to-maturity, unrealized gains	10,000		88,000
Debt securities, held-to-maturity, unrealized losses	19,731,000		18,807,000
Debt securities, held-to-maturity, fair value	142,382,000		149,545,000
Corporate
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	45,831,000		45,702,000
Debt securities, held-to-maturity, transferred unrealized loss	648,000		803,000
Debt securities, held-to-maturity, allowance for credit loss	116,000	116,000	116,000	116,000	116,000	123,000
Total securities held-to-maturity, amortized cost	46,595,000		46,621,000
Debt securities, held-to-maturity, unrealized gains	0		780,000
Debt securities, held-to-maturity, unrealized losses	6,161,000		7,033,000
Debt securities, held-to-maturity, fair value	40,434,000		40,368,000
Trust preferred
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	950,000		948,000
Debt securities, held-to-maturity, transferred unrealized loss	46,000		48,000
Debt securities, held-to-maturity, allowance for credit loss	4,000	$ 4,000	4,000	$ 4,000	$ 4,000	$ 5,000
Total securities held-to-maturity, amortized cost	1,000,000		1,000,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	0		15,000
Debt securities, held-to-maturity, fair value	$ 1,000,000		$ 985,000