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Fair Value Measurements (Schedule of Fair Value for Financial Assets and Liabilities Measure on Recurring Basis) (Details) (Recurring, USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Jun. 30, 2012
--- | --- | ---
Level 1 |  |
Assets |  |
Total | $ 54,179 | $ 36,141
Level 2 |  |
Assets |  |
Total | 111,533 | 99,098
Level 3 |  |
Assets |  |
Total | 0 | 0
Total |  |
Assets |  |
Total | 165,712 | 135,239
Municipal Bonds | Level 1 |  |
Assets |  |
Investments |  | 0
Municipal Bonds | Level 2 |  |
Assets |  |
Investments |  | 2,736
Municipal Bonds | Level 3 |  |
Assets |  |
Investments |  | 0
Municipal Bonds | Total |  |
Assets |  |
Investments |  | 2,736
Federal Agency Notes | Level 1 |  |
Assets |  |
Investments | 0 | 0
Federal Agency Notes | Level 2 |  |
Assets |  |
Investments | 5,513 | 11,234
Federal Agency Notes | Level 3 |  |
Assets |  |
Investments | 0 | 0
Federal Agency Notes | Total |  |
Assets |  |
Investments | 5,513 | 11,234
Money Market Funds | Level 1 |  |
Assets |  |
Investments | 54,179 | 36,141
Money Market Funds | Level 2 |  |
Assets |  |
Investments | 0 | 0
Money Market Funds | Level 3 |  |
Assets |  |
Investments | 0 | 0
Money Market Funds | Total |  |
Assets |  |
Investments | 54,179 | 36,141
Corporate Notes and Bonds | Level 1 |  |
Assets |  |
Investments | 0 | 0
Corporate Notes and Bonds | Level 2 |  |
Assets |  |
Investments | 105,994 | 84,949
Corporate Notes and Bonds | Level 3 |  |
Assets |  |
Investments | 0 | 0
Corporate Notes and Bonds | Total |  |
Assets |  |
Investments | 105,994 | 84,949
Forward Contracts | Level 1 |  |
Assets |  |
Foreign currency forward contracts | 0 | 0
Forward Contracts | Level 2 |  |
Assets |  |
Foreign currency forward contracts | 26 | 179
Forward Contracts | Level 3 |  |
Assets |  |
Foreign currency forward contracts | 0 | 0
Forward Contracts | Total |  |
Assets |  |
Foreign currency forward contracts | $ 26 | $ 179

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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