Securities - Securities Held to Maturity (Details) - USD ($)	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	$ 360,926,000		$ 374,818,000
Debt securities, held-to-maturity, transferred unrealized loss	21,280,000		23,066,000
Debt securities, held-to-maturity, allowance for credit loss	160,000	$ 160,000	168,000	$ 158,000	$ 0	$ 0
Total securities held-to-maturity, amortized cost	382,366,000		398,052,000
Debt securities, held-to-maturity, unrealized gains	39,000		11,000
Debt securities, held-to-maturity, unrealized losses	60,545,000		62,645,000
Debt securities, held-to-maturity, fair value	321,860,000		335,418,000
U.S. agency
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	26,748,000		27,634,000
Debt securities, held-to-maturity, transferred unrealized loss	1,722,000		1,839,000
Debt securities, held-to-maturity, allowance for credit loss	0		0
Total securities held-to-maturity, amortized cost	28,470,000		29,473,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	5,013,000		5,066,000
Debt securities, held-to-maturity, fair value	23,457,000		24,407,000
U.S. agency residential mortgage-backed
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	113,398,000		117,650,000
Debt securities, held-to-maturity, transferred unrealized loss	10,277,000		10,845,000
Debt securities, held-to-maturity, allowance for credit loss	0		0
Total securities held-to-maturity, amortized cost	123,675,000		128,495,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	24,667,000		25,239,000
Debt securities, held-to-maturity, fair value	99,008,000		103,256,000
U.S. agency commercial mortgage-backed
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	4,722,000		4,798,000
Debt securities, held-to-maturity, transferred unrealized loss	199,000		228,000
Debt securities, held-to-maturity, allowance for credit loss	0		0
Total securities held-to-maturity, amortized cost	4,921,000		5,026,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	526,000		596,000
Debt securities, held-to-maturity, fair value	4,395,000		4,430,000
Private label mortgage-backed
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	7,272,000		7,242,000
Debt securities, held-to-maturity, transferred unrealized loss	359,000		416,000
Debt securities, held-to-maturity, allowance for credit loss	1,000	1,000	1,000	2,000	0	0
Total securities held-to-maturity, amortized cost	7,632,000		7,659,000
Debt securities, held-to-maturity, unrealized gains	0		0
Debt securities, held-to-maturity, unrealized losses	919,000		997,000
Debt securities, held-to-maturity, fair value	6,713,000		6,662,000
Obligations of states and political subdivisions
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	162,272,000		168,134,000
Debt securities, held-to-maturity, transferred unrealized loss	7,711,000		8,555,000
Debt securities, held-to-maturity, allowance for credit loss	39,000	39,000	39,000	30,000	0	0
Total securities held-to-maturity, amortized cost	170,022,000		176,728,000
Debt securities, held-to-maturity, unrealized gains	24,000		11,000
Debt securities, held-to-maturity, unrealized losses	21,531,000		25,591,000
Debt securities, held-to-maturity, fair value	148,515,000		151,148,000
Corporate
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	45,569,000		48,418,000
Debt securities, held-to-maturity, transferred unrealized loss	961,000		1,130,000
Debt securities, held-to-maturity, allowance for credit loss	116,000	116,000	123,000	121,000	0	0
Total securities held-to-maturity, amortized cost	46,646,000		49,671,000
Debt securities, held-to-maturity, unrealized gains	15,000		0
Debt securities, held-to-maturity, unrealized losses	7,812,000		5,156,000
Debt securities, held-to-maturity, fair value	38,849,000		44,515,000
Trust preferred
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract]
Securities held to maturity	945,000		942,000
Debt securities, held-to-maturity, transferred unrealized loss	51,000		53,000
Debt securities, held-to-maturity, allowance for credit loss	4,000	$ 4,000	5,000	$ 5,000	$ 0	$ 0
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	77,000		0
Debt securities, held-to-maturity, fair value	$ 923,000		$ 1,000,000