Investment Securities - Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	$ 332,036	$ 363,111
Gross unrealized gains	895	245
Gross unrealized losses	(10,489)	(10,755)
Fair value	322,442	352,601
Held-to-maturity, debt securities, allowance	15	31
Treasury obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost		5,146
Gross unrealized gains		1
Gross unrealized losses		0
Fair value		5,147
Government-agency obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	9,999	11,058
Gross unrealized gains	0	0
Gross unrealized losses	(347)	(652)
Fair value	9,652	10,406
State and municipal obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	315,503	339,816
Gross unrealized gains	895	244
Gross unrealized losses	(9,947)	(9,700)
Fair value	306,451	330,360
Corporate obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	6,534	7,091
Gross unrealized gains	0	0
Gross unrealized losses	(195)	(403)
Fair value	$ 6,339	$ 6,688