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Income Taxes - Deferred Income Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Income Tax Disclosure [Abstract] |  |
Tax credit carryforwards | $ 41,550 | $ 67,451
Research and development expenses | 104,582 | 44,323
Net operating loss carryforwards | 77,321 | 91,704
Interest expense | 65,045 | 79,720
Allowances and reserves | 116,148 | 118,168
Deferred compensation | 63,458 | 40,716
Postretirement benefits | 22,741 | 23,227
Intangible assets | 115 | 212,497
Lease liabilities | 81,604 | 81,298
Other | 35,509 | 35,308
Gross deferred income tax assets | 608,073 | 794,412
Intangible assets | (167,336) | (175,077)
Right-of-use assets | (75,076) | (73,757)
Other | (37,259) | (39,260)
Gross deferred income tax liabilities | (279,671) | (288,094)
Deferred income tax asset valuation allowances | (85,352) | (89,841)
Net deferred income tax assets | $ 243,050 | $ 416,477

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