Income Taxes - Components of Provision and Current Receivable (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax Cuts and Jobs Act of 2017
Corporate tax rate (as a percent)			35.00%	35.00%	35.00%
Additional income tax expense from on-time revaluation of certain tax-related assets		$ 47,600
Current:
Federal			$ 101,162	$ 118,080	$ 120,134
State and local			24,595	20,253	24,900
Total current			125,757	138,333	145,034
Deferred:
Federal			58,732	2,211	(10,386)
State and local			184	1,107	(5,201)
Total deferred			58,916	3,318	(15,587)
Total provision for income taxes			184,673	141,651	$ 129,447
Receivables
Current income tax receivable due from various jurisdictions		$ 53,200	$ 53,200	$ 39,800
Expected
Tax Cuts and Jobs Act of 2017
Corporate tax rate (as a percent)	21.00%