Revenue from Contracts with Customers (Details Narrative) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 30, 2019 USD ($) Number $ / shares	Mar. 31, 2018 USD ($) $ / shares	Apr. 01, 2017 USD ($) $ / shares	Apr. 02, 2018 USD ($)
Retained earnings	$ 641,894	$ 536,978
Sales	702,516	674,949	$ 615,388
Operating income	132,035	128,774	114,586
Net income (loss)	$ 105,193	$ 87,141	$ 70,623
Basic income per share (in dollars per share) | $ / shares	$ 4.32	$ 3.64	$ 3.00
Diluted income per share (in dollars per share) | $ / shares	$ 4.26	$ 3.58	$ 2.97
Inventory work-in-process	$ 90,820	$ 77,890
Transaction price allocated to remaining performance obligations	1 year
The aggregate amount of the transaction price allocated to remaining performance obligations	$ 219,298
Remaining performance obligations over the next 12 months	71.00%
Remaining performance obligations over the next 24 months	95.00%
Revenue recognize remaining performance obligations	Remaining performance obligations over the next 12 and 24 months, respectively, with the remainder recognized thereafter.
Accounts receivable with customers, net	$ 130,735	$ 116,890
Number of segment | Number	4
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Retained earnings	$ 297			$ (277)
Contract assets				1,323
Contract liabilities				754
Sales	1,278
Operating income	666
Net income (loss)	$ 574
Basic income per share (in dollars per share) | $ / shares	$ 0.02
Diluted income per share (in dollars per share) | $ / shares	$ 0.02
Inventory work-in-process	$ (1,260)			$ (847)
Prepaids and other current assets	1,895
Accrued expenses and other current liabilities	$ 2,058