Summary of Significant Accounting Policies and Concentrations of Risk (Inventory) (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Mar. 30, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 35,562	$ 39,727
Work-in-process	204,501	213,784
Finished goods	64,277	61,847
Total inventories	$ 304,340	$ 315,358

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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