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Income Taxes - Temporary Differences and Carryforwards that Comprised Deferred Income Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]    
Acquisition related contingent consideration $ 133,114 $ 107,769
Operating lease liabilities 35,382 34,632
Deferred revenue 26,852 27,882
Accrued liabilities 26,253 22,341
Deferred compensation 24,018 26,269
Postretirement benefits 13,969 14,726
Pension 4,617 11,055
Transactional costs 3,976 4,451
Financing lease agreements 1,820 1,618
Net operating loss carryforwards 1,418 1,628
Charitable contribution carryover 631 3,236
Other 3,199 10,138
Deferred income tax assets 275,249 265,745
Less: Valuation allowance for deferred tax assets 4,372 5,325
Net deferred income tax asset 270,877 260,420
Intangible assets (177,214) (182,585)
Depreciation (173,124) (159,359)
Right-of-use assets - operating leases (34,347) (33,316)
Inventory (13,481) (13,709)
Prepaid expenses (6,774) (6,319)
Patronage dividend (2,369) (4,555)
Deferred income tax liabilities (407,309) (399,843)
Net deferred income tax liability $ (136,432) $ (139,423)