SUPPLEMENTAL GUARANTOR AND NON-GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Statement of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Condensed consolidating statements of comprehensive income (loss)
Net income	$ 129,469	$ 148,910	$ 232,690	$ 382,737
Other comprehensive income (loss):
Foreign currency translation adjustments, net of zero tax	(36,412)	30,063	(22,338)	2,579
Unrealized gain (loss) on derivative instruments and other, net of zero tax	(201)	10,497	(912)	17,782
Comprehensive income	92,856	189,470	209,440	403,098
Reportable legal entities | Parent
Condensed consolidating statements of comprehensive income (loss)
Net income	129,469	148,910	232,690	382,737
Other comprehensive income (loss):
Foreign currency translation adjustments, net of zero tax	(36,412)	30,063	(22,338)	2,579
Unrealized gain (loss) on derivative instruments and other, net of zero tax	(201)	10,497	(912)	17,782
Comprehensive income	92,856	189,470	209,440	403,098
Reportable legal entities | Guarantor Subsidiaries
Condensed consolidating statements of comprehensive income (loss)
Net income	(333,587)	(70,960)	(485,957)	(127,943)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of zero tax	58,791	62,209	68,972	5,025
Unrealized gain (loss) on derivative instruments and other, net of zero tax	3,443	4,099	6,942	9,884
Comprehensive income	(271,353)	(4,652)	(410,043)	(113,034)
Reportable legal entities | Non-Guarantor Subsidiaries
Condensed consolidating statements of comprehensive income (loss)
Net income	24,859	169,781	(48,567)	65,226
Other comprehensive income (loss):
Foreign currency translation adjustments, net of zero tax	35,660	50,828	57,055	(703)
Unrealized gain (loss) on derivative instruments and other, net of zero tax	(201)	10,497	(912)	17,782
Comprehensive income	60,318	231,106	7,576	82,305
Eliminations
Condensed consolidating statements of comprehensive income (loss)
Net income	308,728	(98,821)	534,524	62,717
Other comprehensive income (loss):
Foreign currency translation adjustments, net of zero tax	(94,451)	(113,037)	(126,027)	(4,322)
Unrealized gain (loss) on derivative instruments and other, net of zero tax	(3,242)	(14,596)	(6,030)	(27,666)
Comprehensive income	$ 211,035	$ (226,454)	$ 402,467	$ 30,729