Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss)
Beginning balance	$ 70,621	$ 289,154	$ 101,842
Other comprehensive income (loss) before reclassifications	18,857	(29,913)	81,471
Amounts reclassified from accumulated other comprehensive income (loss)	39,962	30,925	27,347
Other comprehensive income, net of tax	58,819	1,012	108,818
Ending balance	112,632	70,621	289,154
Cash flow hedges
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(1,411)	337	191
Other comprehensive income (loss) before reclassifications	5,069	(1,861)	278
Amounts reclassified from accumulated other comprehensive income (loss)	145	113	(132)
Other comprehensive income, net of tax	5,214	(1,748)	146
Ending balance	3,803	(1,411)	337
Available-for-sale securities
Accumulated Other Comprehensive Income (Loss)
Beginning balance	402	2,849	(3,061)
Other comprehensive income (loss) before reclassifications	(6,662)	5,319	6,719
Amounts reclassified from accumulated other comprehensive income (loss)	11	(7,766)	(809)
Other comprehensive income, net of tax	(6,651)	(2,447)	5,910
Ending balance	(6,249)	402	2,849
Pension and postretirement benefit plans
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(851,063)	(819,018)	(846,461)
Other comprehensive income (loss) before reclassifications	54,618	(70,623)	(845)
Amounts reclassified from accumulated other comprehensive income (loss)	39,806	38,578	28,288
Other comprehensive income, net of tax	94,424	(32,045)	27,443
Ending balance	(756,639)	(851,063)	(819,018)
Foreign currency adjustments
Accumulated Other Comprehensive Income (Loss)
Beginning balance	12,941	(24,311)	(99,630)
Other comprehensive income (loss) before reclassifications	(34,168)	37,252	75,319
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Other comprehensive income, net of tax	(34,168)	37,252	75,319
Ending balance	(21,227)	12,941	(24,311)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(839,131)	(840,143)	(948,961)
Ending balance	$ (780,312)	$ (839,131)	$ (840,143)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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