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Fair Value Measurements and Marketable Securities - Schedule of Company's Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Jun. 30, 2012
--- | --- | ---
Assets: |  |
Assets, Fair Value Measurements | $ 63,908 | $ 63,789
Liabilities: |  |
Liabilities, Fair Value Measurements | 103,453 | 108,734
U.S. municipal securities [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 27,985 | 30,861
Certificates of deposit [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 14,960 | 11,470
Money market funds [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 20,963 | 21,458
Acquisition-related promissory notes [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | 6,534 | 12,215
Term loan [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | 93,127 | 95,381
Interest rate swap [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | 1,351 | 1,138
Short term payable [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | 2,441 |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 20,963 | 21,458
Liabilities: |  |
Liabilities, Fair Value Measurements |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. municipal securities [Member] |  |
Assets: |  |
Assets, Fair Value Measurements |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Certificates of deposit [Member] |  |
Assets: |  |
Assets, Fair Value Measurements |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Money market funds [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 20,963 | 21,458
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Acquisition-related promissory notes [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Term loan [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Interest rate swap [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short term payable [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements |  |
Significant Other Observable Inputs (Level 2) [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 42,945 | 42,331
Liabilities: |  |
Liabilities, Fair Value Measurements | 103,453 | 108,734
Significant Other Observable Inputs (Level 2) [Member] | U.S. municipal securities [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 27,985 | 30,861
Significant Other Observable Inputs (Level 2) [Member] | Certificates of deposit [Member] |  |
Assets: |  |
Assets, Fair Value Measurements | 14,960 | 11,470
Significant Other Observable Inputs (Level 2) [Member] | Money market funds [Member] |  |
Assets: |  |
Assets, Fair Value Measurements |  |
Significant Other Observable Inputs (Level 2) [Member] | Acquisition-related promissory notes [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | 6,534 | 12,215
Significant Other Observable Inputs (Level 2) [Member] | Term loan [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | 93,127 | 95,381
Significant Other Observable Inputs (Level 2) [Member] | Interest rate swap [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | 1,351 | 1,138
Significant Other Observable Inputs (Level 2) [Member] | Short term payable [Member] |  |
Liabilities: |  |
Liabilities, Fair Value Measurements | $ 2,441 |

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- Definition This element represents the aggregate of the liabilities 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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