ORGANIZATION OF THE COMPANY AND BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash collections of deferred purchase price			$ 2,707,562	$ 3,538,604
Cash reclassified to investing activities			2,471,232	2,755,753
Cash reclassified from operating activities			(2,328,605)	(3,107,586)
Accumulated deficit	$ (2,947,661)		(2,947,661)		$ (3,144,114)
Cumulative adjustment to revenue, modification of contract			132,700
Cumulative adjustment to gross profit, modification of contract			9,300
Net sales	(6,944,827)	$ (6,751,552)	(20,079,387)	(19,030,244)
Gross profit	(357,325)	$ (446,328)	(1,137,480)	(1,246,585)
Cumulative adjustment to additional revenue for over-time revenue recognition			164,800
Cumulative adjustment to gross profit for over-time revenue recognition			7,900
Accounting Standards Update 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash reclassified to investing activities				3,500,000
Cash reclassified from operating activities			2,700,000	$ (3,500,000)
Adjustments | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	(36,498)		(36,498)		$ (37,855)
Net sales	(4,885)		(32,122)
Gross profit	$ 2,022		$ 1,357