Income Taxes - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 25, 2016	Dec. 27, 2015
Income Tax Disclosure [Abstract]
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense	$ 68,700	$ 68,700
Accrued income taxes	25,400	25,400	$ 1,900
Income tax benefits related to exercise or vesting of equity awards		13,700	8,600	$ 4,400
AOCI deferred tax assets	196,000	196,000	331,000
Reduction in uncertain tax positions		(2,277)	(4,534)	(2,545)
Total amount of unrecognized tax benefit	7,000	7,000	7,000
Total amount of accrued interest and penalties	2,000	2,000	3,000
Net benefit of accrued interest and penalties		100	$ 900	$ 100
Total amount of unrecognized tax benefit which may be recognized in the next twelve months that would impact the effective tax rate	$ 3,300	$ 3,300