Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 25, 2017	Mar. 26, 2016
Income Taxes [Line Items]
Federal blended corporate income tax rate, percent	31.60%	35.00%	35.00%
Provision for one-time transition tax liability and remeasurement of deferred tax balances	$ 60,100
Provision for remeasurement of deferred tax balances	6,100
Provision for one-time transition tax liability	53,900
Increase (decrease) in valuation allowance	2,100
Gross unrecognized tax benefits	55,164	$ 30,858	$ 18,796
Unrecognized tax benefits, gross increase	26,602	12,127
Unrecognized tax benefits, gross decrease	2,300
Interest and penalties incurred during period	800	$ 200
Federal
Income Taxes [Line Items]
Net operating loss carryforwards	9,700
State
Income Taxes [Line Items]
Net operating loss carryforwards	35,800
Research Tax Credit Carryforward | State
Income Taxes [Line Items]
Tax credit carryforward	$ 12,700