Other Comprehensive Loss - Changes in Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	$ (256,550)	$ (256,322)
Other comprehensive (income) loss, net of taxes	(1,523)	2,220
Net current period other comprehensive (income) loss	(1,523)	2,220
Balances at end of period	(251,086)	(256,550)
Accumulated Other Comprehensive (Loss)/Income
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	7,744	5,524
Other comprehensive (income) loss, net of taxes	(1,523)	2,220
Net current period other comprehensive (income) loss	(1,523)	2,220
Balances at end of period	6,221	7,744
Unfunded Pension Liability
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	5,746	5,524
Other comprehensive (income) loss, net of taxes	(1,280)	222
Net current period other comprehensive (income) loss	(1,280)	222
Balances at end of period	4,466	5,746
Unrealized (Gain) / Loss on Securities
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	1,998
Other comprehensive (income) loss, net of taxes	(243)	1,998
Net current period other comprehensive (income) loss	(243)	1,998
Balances at end of period	$ 1,755	$ 1,998