Other Comprehensive Income (Loss) - Changes in Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,038,025	$ 1,038,890	$ 1,040,335	$ 1,053,595
Current period changes in other comprehensive income (loss)	5,355	1,687	3,253	13,125
Balance at end of year	1,046,734	1,022,788	1,046,734	1,022,788
Unrealized (loss) gain on debt securities available for sale:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(119,540)	(123,349)	(113,649)	(135,482)
Current period changes in other comprehensive income (loss)	(448)	(3,687)	(6,339)	8,446
Balance at end of year	(119,988)	(127,036)	(119,988)	(127,036)
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	3,346	(361)	(414)	504
Current period changes in other comprehensive income (loss)	298	2,883	4,058	2,018
Balance at end of year	3,644	2,522	3,644	2,522
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(44,643)	(44,148)	(44,672)	(44,318)
Current period changes in other comprehensive income (loss)	5,505	2,491	5,534	2,661
Balance at end of year	(39,138)	(41,657)	(39,138)	(41,657)
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(160,837)	(167,858)	(158,735)	(179,296)
Current period changes in other comprehensive income (loss)	5,355	1,687	3,253	13,125
Balance at end of year	$ (155,482)	$ (166,171)	$ (155,482)	$ (166,171)