Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 28, 2019	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Income Taxes [Line Items]
Provisional income tax expense				$ 60,100
Reduction to the provisional amounts	$ (11,100)
Provision for one-time transition tax liability		$ 27,000
Decrease in valuation allowance		(6,000)
Decrease with no effect on tax expense		(5,800)
Net decrease affecting tax expense		(200)
Gross unrecognized tax benefits		36,208	$ 39,746	$ 55,164
Unrecognized tax benefits, gross increase		615	2,204
Gross decrease related to prior year unrecognized tax positions		(4,153)	(17,622)
Interest and penalties incurred during period		900	$ 1,500
Interested accrued		3,500
Federal
Income Taxes [Line Items]
Net operating loss carryforwards		6,300
State
Income Taxes [Line Items]
Net operating loss carryforwards		12,400
Research Tax Credit Carryforward | State
Income Taxes [Line Items]
Tax credit carryforward		$ 13,300