PROPERTY AND EQUIPMENT PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Land	$ 65,338	$ 72,204
Construction in process	31,808	40,772
Buildings and improvements	378,193	371,336
Furniture, fixtures and computer equipment	160,298	159,511
Machinery and equipment	982,240	989,423
Property, Plant and Equipment, Gross	1,617,877	1,633,246
Less accumulated depreciation	812,847	743,512
Property and equipment, net	805,030	889,734
Depreciation	123,199	122,197	$ 108,347
Capitalized Computer Software, Gross	91,557	93,047
Capitalized Computer Software, Accumulated Amortization	$ 76,847	$ 66,760