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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ 1,718,256
Other comprehensive income before reclassifications			38,015
Amounts reclassified from accumulated other comprehensive loss			27,741
Other comprehensive income (loss)	$ 45,016	$ (63,574)	65,756	$ (48,388)
Ending balance	1,871,136	1,625,463	1,871,136	1,625,463
Accumulated other comprehensive loss
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(324,570)	(244,642)	(345,310)	(259,828)
Ending balance	(279,554)	$ (308,216)	(279,554)	$ (308,216)
Unrecognized Net Defined Benefit Plan Costs
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(156,733)
Other comprehensive income before reclassifications			0
Amounts reclassified from accumulated other comprehensive loss			3,523
Other comprehensive income (loss)			3,523
Ending balance	(153,210)		(153,210)
Change in Fair Value of Derivatives
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(772)
Other comprehensive income before reclassifications			2,736
Amounts reclassified from accumulated other comprehensive loss			629
Other comprehensive income (loss)			3,365
Ending balance	2,593		2,593
Foreign Currency Translation
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(187,805)
Other comprehensive income before reclassifications			35,279
Amounts reclassified from accumulated other comprehensive loss			23,589
Other comprehensive income (loss)			58,868
Ending balance	$ (128,937)		$ (128,937)