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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ 1,889,358
Other comprehensive loss before reclassifications			(49,983)
Amounts reclassified from accumulated other comprehensive loss			3,814
Other comprehensive (loss) income	$ (25,540)	$ 45,016	(46,169)	$ 65,756
Ending balance	1,933,690	1,871,136	1,933,690	1,871,136
Accumulated other comprehensive loss
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(271,990)	(324,570)	(251,361)	(345,310)
Ending balance	(297,530)	$ (279,554)	(297,530)	$ (279,554)
Unrecognized Net Defined Benefit Plan Costs
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(133,523)
Other comprehensive loss before reclassifications			0
Amounts reclassified from accumulated other comprehensive loss			2,814
Other comprehensive (loss) income			2,814
Ending balance	(130,709)		(130,709)
Change in Fair Value of Derivatives
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(216)
Other comprehensive loss before reclassifications			1,952
Amounts reclassified from accumulated other comprehensive loss			1,000
Other comprehensive (loss) income			2,952
Ending balance	2,736		2,736
Foreign Currency Translation
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(117,622)
Other comprehensive loss before reclassifications			(51,935)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive (loss) income			(51,935)
Ending balance	$ (169,557)		$ (169,557)