Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Changes in AOCI, Net
Total accumulated other comprehensive (loss) income, beginning of period			$ (4,525)
Total accumulated other comprehensive (loss) income, end of period	$ (2,670)		(2,670)
Changes in Fair Market Value of Derivatives
Changes in AOCI, Gross
Gross, beginning of the period	969	$ (877)	(635)	$ (1,038)
Gross, gain (loss) recognized in OCI	976	490	2,554	696
Gross, gain (loss) reclassified from AOCI to earnings	(61)	(142)	(35)	(187)
Gross, ending balance	1,884	(529)	1,884	(529)
Changes in AOCI, Income tax benefit (expense)
Income tax benefit (expense), beginning of period	(221)	203	147	240
Income tax benefit (expense), gain (loss) recognized in OCI	(224)	(113)	(587)	(160)
Income tax benefit (expense), gain (loss) reclassified from AOCI to earnings	14	33	9	43
Income tax benefit (expense), ending of period	(431)	123	(431)	123
Changes in AOCI, Net
Total accumulated other comprehensive (loss) income, beginning of period	748	(674)	(488)	(798)
Gain (loss) recognized in OCI, net	752	377	1,967	536
(Gain) Loss reclassified from AOCI to earnings, net	47	109	26	144
Total accumulated other comprehensive (loss) income, end of period	1,453	(406)	1,453	(406)
Changes in Unrealized Pension Cost
Changes in AOCI, Gross
Gross, beginning of the period	(2,624)	(126,157)	(2,744)	(128,004)
Gross, gain (loss) recognized in OCI	1,977	499	1,977	499
Gross, gain (loss) reclassified from AOCI to earnings	143	21,606	263	23,453
Gross, ending balance	(504)	(104,052)	(504)	(104,052)
Changes in AOCI, Income tax benefit (expense)
Income tax benefit (expense), beginning of period	712	34,492	738	34,917
Income tax benefit (expense), gain (loss) recognized in OCI	0	(115)	0	(115)
Income tax benefit (expense), gain (loss) reclassified from AOCI to earnings	(38)	(4,966)	(64)	(5,391)
Income tax benefit (expense), ending of period	674	29,411	674	29,411
Changes in AOCI, Net
Total accumulated other comprehensive (loss) income, beginning of period	(1,912)	(91,665)	(2,006)	(93,087)
Gain (loss) recognized in OCI, net	1,977	384	1,977	384
(Gain) Loss reclassified from AOCI to earnings, net	(105)	(16,640)	(199)	(18,062)
Total accumulated other comprehensive (loss) income, end of period	170	(74,641)	170	(74,641)
Cumulative Translation Adjustment
Changes in AOCI, Gross
Gross, beginning of the period	(2,281)	(2,024)	(2,032)	(2,036)
Gross, gain (loss) recognized in OCI	(2,012)	1	(2,261)	13
Gross, gain (loss) reclassified from AOCI to earnings	0	0	0	0
Gross, ending balance	(4,293)	(2,023)	(4,293)	(2,023)
Changes in AOCI, Income tax benefit (expense)
Income tax benefit (expense), beginning of period	0	0	0	0
Income tax benefit (expense), gain (loss) recognized in OCI	0	0	0	0
Income tax benefit (expense), gain (loss) reclassified from AOCI to earnings	0	0	0	0
Income tax benefit (expense), ending of period	0	0	0	0
Changes in AOCI, Net
Total accumulated other comprehensive (loss) income, beginning of period	(2,281)	(2,024)	(2,032)	(2,036)
Gain (loss) recognized in OCI, net	(2,012)	1	(2,261)	13
(Gain) Loss reclassified from AOCI to earnings, net		0	0	0
Total accumulated other comprehensive (loss) income, end of period	(4,293)	(2,023)	(4,293)	(2,023)
Accumulated Other Comprehensive (Loss) Income
Changes in AOCI, Net
Total accumulated other comprehensive (loss) income, beginning of period	(3,445)	(94,363)	(4,526)	(95,921)
Gain (loss) recognized in OCI, net	717	762	1,683	933
(Gain) Loss reclassified from AOCI to earnings, net	58	16,531	173	17,918
Total accumulated other comprehensive (loss) income, end of period	$ (2,670)	$ (77,070)	$ (2,670)	$ (77,070)