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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018	Mar. 30, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 268,104		$ 268,104		$ 343,979
Proceeds from sale of property, plant and equipment			16,263	$ 2,314
Gain on sale of assets	0	$ 0	8,083	$ 0
Impairment charges	21,200
Office space in Boston, MA
Property, Plant and Equipment [Line Items]
Sale of property			7,800
Proceeds from sale of property, plant and equipment			15,000
Non-cash consideration			900
Gain on sale of assets			8,100
HDC Line
Property, Plant and Equipment [Line Items]
Impairment charges	19,800
Non-core and Underperforming Assets
Property, Plant and Equipment [Line Items]
Impairment charges	1,400
Office Space
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 5,600		$ 5,600