Foreign Currency Transactions and Derivatives (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014
Derivative [Line Items]
Foreign currency net gains or (losses)	$ 327,000	$ (2,400,000)	$ 123,000	$ (3,000,000)
Hedging transaction net (loss) from foreign exchange derivative contracts	(510,000)	887,000	(728,000)	897,000
Derivative, maturity date			Oct. 31, 2014		Apr. 30, 2014
Purchase [Member]
Derivative [Line Items]
Amount of derivative contracts	14,300,000		14,300,000		24,100,000
Sale [Member]
Derivative [Line Items]
Amount of derivative contracts	$ 4,700,000		$ 4,700,000		$ 3,100,000