Derivative Instruments and Hedging Activities (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2011
Derivative Instruments and Hedging Activities [Abstract]
Notional amounts of the forward contracts	$ 232,900,000		$ 232,900,000		$ 175,600,000
Fair values of asset foreign currency forward contracts	900,000		900,000		2,700,000
Fair values of the call options	6,200,000		6,200,000		7,800,000
Percentage of Planned purchases hedged			60.00%
Maturity period of call option			12 months or less
Unrealized (loss) gain recognized in AOCI	(6,089,000)	4,795,000	(4,587,000)	4,073,000
Period of reclassification of loss from AOCI to cost of sales			12 months
Gain (loss) reclassified into earnings	$ 3,564,000	$ (132,000)	$ 5,409,000	$ 2,004,000