Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Dec. 30, 2017	Sep. 23, 2017	Jun. 24, 2017	Dec. 24, 2016	Dec. 30, 2017	Dec. 24, 2016	Mar. 31, 2018
Income Taxes [Line Items]
Provision for income taxes	$ 70,961			$ 23,751	$ 93,121	$ 43,983
Effective tax rate	67.70%			16.30%	38.30%	16.30%
Provision related to remeasurement of deferred tax balances	$ 6,100
Provision for one-time transition tax liability	51,800
Unrecognized tax benefits	36,200				$ 36,200
Unrecognized tax benefits, gross decrease due to lapse of the statute of limitations applicable to a prior year tax deduction					2,300
Unrecognized tax benefits, gross increase due to current year unrecognized tax benefits	2,600	$ 2,800	$ 2,200
Decrease in unrecognized tax benefits is reasonably possible	1,100				1,100
Balance of accrued interest and penalties, net of tax	$ 800				$ 800
Scenario, Forecast
Income Taxes [Line Items]
Federal blended corporate income tax rate, percent							31.60%