Accumulated Other Comprehensive Loss - Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ 1,562,696
Other comprehensive loss before reclassifications			(49,446)
Amounts reclassified from accumulated other comprehensive loss			1,058
Other comprehensive (loss) income	$ (63,574)	$ 28,373	(48,388)	$ (2,480)
Ending balance	1,625,463	1,388,580	1,625,463	1,388,580
Accumulated Other Comprehensive Loss
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(244,642)	(291,806)	(259,828)	(260,953)
Ending balance	(308,216)	$ (263,433)	(308,216)	$ (263,433)
Unrecognized Net Defined Benefit Plan Costs
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(119,474)
Other comprehensive loss before reclassifications			0
Amounts reclassified from accumulated other comprehensive loss			1,038
Other comprehensive (loss) income			1,038
Ending balance	(118,436)		(118,436)
Change in Fair Value of Derivatives
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(2,327)
Other comprehensive loss before reclassifications			2,257
Amounts reclassified from accumulated other comprehensive loss			20
Other comprehensive (loss) income			2,277
Ending balance	(50)		(50)
Foreign Currency Translation
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(138,027)
Other comprehensive loss before reclassifications			(51,703)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive (loss) income			(51,703)
Ending balance	$ (189,730)		$ (189,730)