Fair Value Measurements and Marketable Securities - Schedule of Company's Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Assets:
Assets, Fair Value Measurements	$ 80,932	$ 63,789
Liabilities:
Liabilities, Fair Value Measurements	93,332	108,734
Acquisition-related promissory notes [Member]
Liabilities:
Liabilities, Fair Value Measurements	3,875	12,215
Term loan [Member]
Liabilities:
Liabilities, Fair Value Measurements	88,802	95,381
Interest rate swap [Member]
Liabilities:
Liabilities, Fair Value Measurements	655	1,138
U.S. municipal securities [Member]
Assets:
Assets, Fair Value Measurements	25,544	30,861
Certificates of deposit [Member]
Assets:
Assets, Fair Value Measurements	16,923	11,470
Money market funds [Member]
Assets:
Assets, Fair Value Measurements	38,465	21,458
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Assets, Fair Value Measurements	38,465	21,458
Liabilities:
Liabilities, Fair Value Measurements
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] | 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	38,465	21,458
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Assets, Fair Value Measurements	42,467	42,331
Liabilities:
Liabilities, Fair Value Measurements	93,332	108,734
Significant Other Observable Inputs (Level 2) [Member] | Acquisition-related promissory notes [Member]
Liabilities:
Liabilities, Fair Value Measurements	3,875	12,215
Significant Other Observable Inputs (Level 2) [Member] | Term loan [Member]
Liabilities:
Liabilities, Fair Value Measurements	88,802	95,381
Significant Other Observable Inputs (Level 2) [Member] | Interest rate swap [Member]
Liabilities:
Liabilities, Fair Value Measurements	655	1,138
Significant Other Observable Inputs (Level 2) [Member] | U.S. municipal securities [Member]
Assets:
Assets, Fair Value Measurements	25,544	30,861
Significant Other Observable Inputs (Level 2) [Member] | Certificates of deposit [Member]
Assets:
Assets, Fair Value Measurements	16,923	11,470
Significant Other Observable Inputs (Level 2) [Member] | Money market funds [Member]
Assets:
Assets, Fair Value Measurements