Accumulated Other Comprehensive Loss - Changes in Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	$ (251,086)	$ (256,550)
Other comprehensive (income) loss, net of taxes	396	(337)
Net current period other comprehensive (income) loss	396	(337)
Balances at end of period	(250,016)	(253,761)
Accumulated Other Comprehensive (Loss)/Income
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	6,221	7,744
Net current period other comprehensive (income) loss	396	(337)
Balances at end of period	6,617	7,407
Unfunded Pension Liability
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	4,466	5,746
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	1,755	1,998
Other comprehensive (income) loss, net of taxes	396	(337)
Net current period other comprehensive (income) loss	396	(337)
Balances at end of period	2,151	1,661
Other comprehensive (income) loss, net of taxes
Changes in the components of accumulated other comprehensive loss, net of taxes
Other comprehensive (income) loss, net of taxes	$ 396	$ (337)