ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ 2,678,276
Ending balance	$ 2,979,980		2,979,980
Unrealized gain (loss) on derivative instruments and other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(48,470)	$ (42,233)	(32,426)	$ (41,522)
Other comprehensive gain (loss) before reclassifications	(4,643)	(1,354)	(5,488)	(1,031)
Net (gains) losses reclassified from accumulated other comprehensive loss	(74)	1,153	(15,273)	119
Net current-period other comprehensive gain (loss)	(4,717)	(201)	(20,761)	(912)
Ending balance	(53,187)	(42,434)	(53,187)	(42,434)
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(75,403)	(80,319)	(95,717)	(94,393)
Other comprehensive gain (loss) before reclassifications	7,248	(33,770)	27,562	(19,471)
Net (gains) losses reclassified from accumulated other comprehensive loss	244	(2,642)	244	(2,867)
Net current-period other comprehensive gain (loss)	7,492	(36,412)	27,806	(22,338)
Ending balance	(67,911)	(116,731)	(67,911)	(116,731)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(123,873)	(122,552)	(128,143)	(135,915)
Other comprehensive gain (loss) before reclassifications	2,605	(35,124)	22,074	(20,502)
Net (gains) losses reclassified from accumulated other comprehensive loss	170	(1,489)	(15,029)	(2,748)
Net current-period other comprehensive gain (loss)	2,775	(36,613)	7,045	(23,250)
Ending balance	$ (121,098)	$ (159,165)	$ (121,098)	$ (159,165)