STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (545,299)	$ (390,629)	$ (545,299)	$ (390,629)	$ (565,901)	$ (489,277)	$ (487,684)	$ (382,225)	$ (383,828)	$ (367,870)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	11,074	(7,725)	2,164	(21,211)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	4,581	47	4,921	787
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	15,655	(8,077)	(115,886)	(21,621)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(80)	(327)	(1,817)	(1,138)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	4,947	(327)	58,271	(1,138)
Other Comprehensive Income (Loss), Net of Tax	20,602	(8,404)	(57,615)	(22,759)
Accumulated Translation Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), before Tax	(46,442)	(79,894)	(46,442)	(79,894)	(57,516)		(48,606)	(72,169)		(58,683)
Other Comprehensive Income (Loss), Net of Tax	11,074	(7,725)	2,164	(21,211)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	1,974	(229)	1,974	(229)	(2,527)		(1,130)	51		122
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	4,581	47	4,921	787
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(80)	(327)	(1,817)	(1,138)
Other Comprehensive Income (Loss), Net of Tax	4,501	(280)	3,104	(351)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(500,831)	(310,506)	(500,831)	(310,506)	$ (505,858)		$ (437,948)	$ (310,107)		$ (309,309)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	(399)	(122,971)	(1,197)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	5,027	0	60,088	0
Other Comprehensive Income (Loss), Net of Tax	$ 5,027	$ (399)	$ (62,883)	$ (1,197)