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Summary of Significant Accounting Policies - Additional Information (Detail)
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Jun. 30, 2014
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| Summary Of Significant Accounting Policies [Line Items] | |
| Maximum Ownership Percent Consider Under Cost Method Investments | 20.00% |
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Minimum [Member]
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| Summary Of Significant Accounting Policies [Line Items] | |
| Equity Method Investment, Ownership Percentage | 20.00% |