Derivative Instruments (Pretax effect of derivative instruments on the condensed consolidated statement of operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended			3 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Cost of Sales [Member]	Dec. 31, 2012 Foreign Exchange Contract [Member]	Dec. 31, 2012 Foreign Exchange Contract [Member] Cost of Sales [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 36	$ (201)	$ 171		$ (128)	$ 10
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	75		138	125
Amount of Gain Recognized in Income on Derivatives	$ (1)	$ 258	$ 987			$ (276)