Securities - Securities with Unrealized Losses Aggregated by Investment Category and Time with Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	$ 0	$ 1,812
Less than 12 months, unrealized losses	0	29
More than 12 months, fair value	485,633	501,940
More than 12 months, unrealized losses	61,450	69,626
Total, fair value	485,633	503,752
Total, unrealized losses	61,450	69,655
U.S. Treasury Notes and Bonds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	82,232	80,194
More than 12 months, unrealized losses	7,762	10,151
Total, fair value	82,232	80,194
Total, unrealized losses	7,762	10,151
State and Municipal [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	557
Less than 12 months, unrealized losses	0	6
More than 12 months, fair value	235,034	234,125
More than 12 months, unrealized losses	34,746	35,230
Total, fair value	235,034	234,682
Total, unrealized losses	34,746	35,236
Mortgage-backed [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	1,255
Less than 12 months, unrealized losses	0	23
More than 12 months, fair value	158,840	176,400
More than 12 months, unrealized losses	18,708	23,882
Total, fair value	158,840	177,655
Total, unrealized losses	18,708	23,905
Corporate [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	213	204
More than 12 months, unrealized losses	37	46
Total, fair value	213	204
Total, unrealized losses	37	46
Asset-backed Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	9,314	11,017
More than 12 months, unrealized losses	197	317
Total, fair value	9,314	11,017
Total, unrealized losses	$ 197	$ 317

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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