Accumulated Other Comprehensive Loss - Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ 1,889,358
Other comprehensive loss before reclassifications			(12,117)
Amounts reclassified from accumulated other comprehensive loss			2,881
Other comprehensive income (loss)	$ 36,933	$ (30,032)	(9,236)	$ 35,724
Ending balance	2,053,970	1,781,889	2,053,970	1,781,889
Accumulated other comprehensive loss
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(297,530)	(279,554)	(251,361)	(345,310)
Ending balance	(260,597)	$ (309,586)	(260,597)	$ (309,586)
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			4,533
Other comprehensive income (loss)			4,533
Ending balance	(128,990)		(128,990)
Change in Fair Value of Derivatives
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(216)
Other comprehensive loss before reclassifications			837
Amounts reclassified from accumulated other comprehensive loss			(1,652)
Other comprehensive income (loss)			(815)
Ending balance	(1,031)		(1,031)
Foreign Currency Translation
Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			(117,622)
Other comprehensive loss before reclassifications			(12,954)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive income (loss)			(12,954)
Ending balance	$ (130,576)		$ (130,576)