SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Segment Revenue and Gross Margin Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Net revenues	$ 410,969	$ 461,709	$ 766,689	$ 909,476
Gross profit	180,746	206,071	337,078	418,717
Depreciation, as reviewed by CODM	3,600	3,600	6,900	7,300
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment revenues as reviewed by CODM	415,206	470,233	776,008	930,159
Gross profit	202,901	246,419	383,386	503,160
Purchase accounting amortization	(17,176)	(30,716)	(35,414)	(60,716)
Segment Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Deferred revenue purchase accounting	(4,237)	(8,524)	(9,319)	(20,683)
Integration and rebranding costs	0	(111)	0	(1,069)
Stock-based compensation	$ (742)	$ (997)	$ (1,575)	$ (1,975)