Fair Value Measurements- Gains and Losses on Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Amounts of gains and losses on the derivative instruments
Amount of Gain (Loss) Deferred as a Component of Accumulated Other Comprehensive Loss After Reclassification to Costs of Goods Sold	$ (4,722)	$ 648
Cost of goods sold
Amounts of gains and losses on the derivative instruments
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Loss to Costs of Goods Sold	(2,460)	400
Other Income (Expense), Net
Amounts of gains and losses on the derivative instruments
Amount of Gain (Loss) Immediately Recognized in Other Expense, Net	34	(474)
Designated as hedging instruments | Cash Flow Hedges
Amounts of gains and losses on the derivative instruments
Amount of Gain (Loss) Deferred as a Component of Accumulated Other Comprehensive Loss After Reclassification to Costs of Goods Sold	(4,722)	648
Designated as hedging instruments | Cash Flow Hedges | Cost of goods sold
Amounts of gains and losses on the derivative instruments
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Loss to Costs of Goods Sold	(2,460)	400
Designated as hedging instruments | Cash Flow Hedges | Other Income (Expense), Net
Amounts of gains and losses on the derivative instruments
Amount of Gain (Loss) Immediately Recognized in Other Expense, Net	68	(55)
Not designated as hedging instruments | Other Income (Expense), Net | Currency exchange contracts
Amounts of gains and losses on the derivative instruments
Amount of Gain (Loss) Immediately Recognized in Other Expense, Net	$ (34)	$ (419)