Income Taxes - Schedule of Principal Components of the Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred income tax assets:
Accruals not yet tax deductible	$ 144,331	$ 152,288
Stock compensation	11,779	12,995
Net operating loss and research & development tax credit carryforwards	82,027	68,809
Amortization of research and experimental costs	100,880	78,169
Other	62,889	66,749
Deferred tax assets gross	401,906	379,010
Valuation allowance	(59,313)	(48,516)
Deferred tax assets net	342,593	330,494
Deferred income tax liabilities:
Depreciation, tax in excess of book	(51,107)	(57,641)
Pension and postretirement healthcare plan obligations	(90,589)	(82,682)
Withholding tax	(15,915)	(29,904)
Other	(26,045)	(32,597)
Deferred tax liabilities net	(183,656)	(202,824)
Total	$ 158,937	$ 127,670