Other Comprehensive Income (Loss) - Changes in Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,040,335	$ 1,053,595
Current period changes in other comprehensive income (loss)	(2,102)	11,438
Balance at end of year	1,038,025	1,038,890
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(158,735)	(179,296)
Current period changes in other comprehensive income (loss)	(2,102)	11,438
Balance at end of year	(160,837)	(167,858)
Unrealized (Losses) on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(113,649)	(135,482)
Current period changes in other comprehensive income (loss)	(5,891)	12,133
Balance at end of year	(119,540)	(123,349)
Unrealized Gains (Losses) on Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(414)	504
Current period changes in other comprehensive income (loss)	3,760	(865)
Balance at end of year	3,346	(361)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(44,672)	(44,318)
Current period changes in other comprehensive income (loss)	29	170
Balance at end of year	$ (44,643)	$ (44,148)