REVENUE RECOGNITION - Contract Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
ASSETS:
Customer accounts receivable	$ 240,482	$ 205,299
Increase (decrease) in customer accounts receivable	35,183
Unbilled receivables	3,354	4,338
Increase (decrease) of unbilled receivables	(984)
Other receivables	3,577	4,996
Increase (decrease) in other receivables	(1,419)
Long-term unbilled receivables	2,754	2,254
Increase (decrease) of long-term unbilled receivables	500
Contract assets	250,167	216,887
Increase (decrease) in contract assets	33,280
LIABILITIES:
Deferred revenue	272,508	271,698	$ 301,925
Increase (decrease) in deferred revenue	810
Deferred revenue, long-term	94,619	90,157	$ 91,409
Increase (decrease) in deferred revenue, long-term	4,462
Contract liabilities	367,127	$ 361,855
Increase (decrease) in contract liabilities	$ 5,272