SUPPLEMENTAL CASH FLOW DISCLOSURES (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Net cash paid for:
Interest	$ 114,578	$ 87,179	$ 86,406
Income taxes	105,453	70,621	87,561
Non-cash investing activity:
Unpaid purchases of property and equipment	$ 93,310	$ 115,757	$ 42,902