Fair Value Measurements (Schedule of Fair Value for Financial Assets and Liabilities Measure on Recurring Basis) (Details) (Recurring, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013
Level 1
Assets
Total	$ 68,154	$ 54,285
Liabilities
Total	0
Level 2
Assets
Total	96,427	109,831
Liabilities
Total	(7)
Level 3
Assets
Total	0	0
Liabilities
Total	0
Total
Assets
Total	164,581	164,116
Liabilities
Total	(7)
Money Market Funds | Level 1
Assets
Investments	68,154	54,285
Money Market Funds | Level 2
Assets
Investments	0	0
Money Market Funds | Level 3
Assets
Investments	0	0
Money Market Funds | Total
Assets
Investments	68,154	54,285
Corporate Notes and Bonds | Level 1
Assets
Investments	0	0
Corporate Notes and Bonds | Level 2
Assets
Investments	96,427	109,810
Corporate Notes and Bonds | Level 3
Assets
Investments	0	0
Corporate Notes and Bonds | Total
Assets
Investments	96,427	109,810
Foreign currency forward contracts | Level 1
Assets
Foreign currency forward contracts		0
Liabilities
Foreign currency forward contracts	0
Foreign currency forward contracts | Level 2
Assets
Foreign currency forward contracts		21
Liabilities
Foreign currency forward contracts	(7)
Foreign currency forward contracts | Level 3
Assets
Foreign currency forward contracts		0
Liabilities
Foreign currency forward contracts	0
Foreign currency forward contracts | Total
Assets
Foreign currency forward contracts		21
Liabilities
Foreign currency forward contracts	$ (7)