Income Taxes - Temporary Differences and Carryforwards that Comprised Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 29, 2019	Dec. 30, 2018
Income Tax Disclosure [Abstract]
Acquisition related contingent consideration	$ 110,036	$ 94,323
Operating lease liabilities	27,346
Deferred compensation	26,788	26,154
Deferred revenue	24,936	25,027
Accrued liabilities	19,266	18,485
Pension	14,124	7,031
Postretirement benefits	13,250	13,843
Charitable contribution carryover	6,622	5,723
Transactional costs	4,857	5,291
Financing or capital lease agreements	2,432	2,871
Net operating loss carryforwards	2,012	7,628
Other	3,022	4,198
Deferred income tax assets	254,691	210,574
Less: Valuation allowance for deferred tax assets	7,190	5,899
Net deferred income tax asset	247,501	204,675
Intangible assets	(151,940)	(154,974)
Depreciation	(147,140)	(131,856)
Right of use assets - operating leases	(26,997)
Investment in Piedmont	(23,287)	(24,540)
Inventory	(12,631)	(10,553)
Prepaid expenses	(7,627)	(8,680)
Patronage dividend	(3,009)	(1,246)
Deferred income tax liabilities	(372,631)	(331,849)
Net deferred income tax liability	$ (125,130)	$ (127,174)