Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 83,038	$ 32,084	$ 122,579	$ 2,091
Other comprehensive loss:
Unrealized gain on marketable securities, net of tax	0	85	0	90
Foreign currency translation adjustment, including intra-entity foreign currency transactions that are of a long-term investment nature	(1,242)	(181)	(1,455)	(2,394)
Reclassification adjustments, net of tax:
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	231	0	353	0
Amortization of pension actuarial loss	34	24	68	48
Other comprehensive loss	(977)	(72)	(1,034)	(2,256)
Total comprehensive income (loss)	$ 82,061	$ 32,012	$ 121,545	$ (165)