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Share-Based Compensation - Summary of Stock Option Activity (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Shares settled down | 1,431,320 xnet_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsSettledInPeriod

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- Definition Share based compensation arrangement by share based payment award options settled in period. + References No definition available. + Details
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