SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Segments Results for Revenue and Gross Margin (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]
Total segment gross profit as reviewed by CODM	$ 180,746	$ 206,071	$ 337,078	$ 418,717
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment revenues as reviewed by CODM	415,206	470,233	776,008	930,159
Total segment gross profit as reviewed by CODM	202,901	246,419	383,386	503,160
Operating Segments | Products Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment revenues as reviewed by CODM	347,970	395,606	639,756	778,978
Total segment gross profit as reviewed by CODM	156,627	198,104	290,869	404,796
Operating Segments | Services Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment revenues as reviewed by CODM	67,236	74,627	136,252	151,181
Total segment gross profit as reviewed by CODM	$ 46,274	$ 48,315	$ 92,517	$ 98,364