Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Net Income (Loss) Available to Common Stockholders, Basic	$ (12,205)	$ (37,050)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(14,388)	1,421
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(12,514)	2,113
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(24,719)	(34,937)
Foreign currency translation gains (losses)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(6,386)	5,865
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(6,386)	5,865
Accumulated Defined Benefit Plans Adjustment [Member]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	163	167
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	163	167
Post-retirement plan adjustments
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(42)	(40)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	42	40
Forward Contracts [Member]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(2,618)	(3,512)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(1,753)	(565)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(865)	(2,947)
Foreign exchange contracts
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(5,384)	(932)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (5,384)	$ (932)