Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	$ 4,394,147	$ 5,804,611
Other comprehensive income (loss)	73,622	(27,172)	$ 35,626
Balance at end of year	4,320,796	4,394,147	5,804,611
Foreign Currency Translation Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(324,011)	(353,252)
Before reclassifications to income	12,116	29,241
Reclassifications to income	0	0
Other comprehensive income (loss)	12,116	29,241
Balance at end of year	(311,895)	(324,011)	(353,252)
Retirement and Postretirement Benefit Plan Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(275,632)	(218,015)
Before reclassifications to income	40,095	(70,815)
Reclassifications to income	19,721	13,198
Other comprehensive income (loss)	59,816	(57,617)
Balance at end of year	(215,816)	(275,632)	(218,015)
Reclassification before tax	23,503	17,694
Reclassification tax	3,782	4,496
Deferred Loss on Interest Rate Derivative Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(1,690)	(2,894)
Before reclassifications to income	0	0
Reclassifications to income	1,690	1,204
Other comprehensive income (loss)	1,690	1,204
Balance at end of year	0	(1,690)	(2,894)
Reclassification before tax	2,140	1,525
Reclassification tax	450	321
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(601,333)	(574,161)	(609,787)
Before reclassifications to income	52,211	(41,574)
Reclassifications to income	21,411	14,402
Other comprehensive income (loss)	73,622	(27,172)
Balance at end of year	$ (527,711)	$ (601,333)	$ (574,161)