Accumulated Other Comprehensive Loss - Changes in Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	$ (250,016)	$ (253,761)	$ (251,086)	$ (256,550)
Other comprehensive (income) loss, net of taxes	115	314	511	(23)
Net current period other comprehensive (income) loss	115	314	511	(23)
Balances at end of period	(249,167)	(250,634)	(249,167)	(250,634)
Accumulated Other Comprehensive (Loss)/Income
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	6,617	7,407	6,221	7,744
Other comprehensive (income) loss, net of taxes	115	314	511	(23)
Net current period other comprehensive (income) loss	115	314	511	(23)
Balances at end of period	6,732	7,721	6,732	7,721
Unfunded Pension Liability
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	4,466	5,746	4,466	5,746
Balances at end of period	4,466	5,746	4,466	5,746
Unrealized Loss/(Gain) on Securities
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	2,151	1,661	1,755	1,998
Other comprehensive (income) loss, net of taxes	115	314	511	(23)
Net current period other comprehensive (income) loss	115	314	511	(23)
Balances at end of period	$ 2,266	$ 1,975	$ 2,266	$ 1,975