Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	$ 728,941	$ 717,689	$ 663,054
Ending balances	617,390	728,941	717,689
Available-for-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(14,560)	20,609	4,039
Other comprehensive (loss) income	(164,243)	(35,169)	16,570
Ending balances	(178,803)	(14,560)	20,609
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(41,390)	(52,683)	(47,603)
Other comprehensive (loss) income	11,504	11,293	(5,080)
Ending balances	(29,886)	(41,390)	(52,683)
Accumulated Other Comprehensive Income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(55,950)	(32,074)	(43,564)
Other comprehensive (loss) income	(152,739)	(23,876)	11,490
Ending balances	$ (208,689)	$ (55,950)	$ (32,074)