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Short-Term Investments - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2014
Schedule of Investments [Abstract] |
Short-term investments' maturity period | 1 year

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- Details
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- Definition Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy. The maturity period of the investment. + References No definition available. + Details
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