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Commitments and Contingencies - Additional Information (Detail) | 12 Months Ended | 1 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Jan. 31, 2015 Subsequent Event [Member] USD ($) | Jan. 31, 2015 Subsequent Event [Member] CNY | Apr. 20, 2015 Subsequent Event [Member] Lawsuits | Apr. 20, 2015 Xunlei Kankan and online game business [Member] Subsequent Event [Member] Lawsuits | Dec. 31, 2014 Rental commitments [Member] USD ($) | Dec. 31, 2013 Rental commitments [Member] USD ($) | Dec. 31, 2012 Rental commitments [Member] USD ($) | Dec. 31, 2014 Bandwidth Lease Commitments [Member] USD ($) | Dec. 31, 2013 Bandwidth Lease Commitments [Member] USD ($) | Dec. 31, 2012 Bandwidth Lease Commitments [Member] USD ($) | Dec. 31, 2014 Content Copyrights [Member] USD ($) | Apr. 20, 2015 Content Copyrights [Member] Subsequent Event [Member] Lawsuits | Mar. 31, 2015 Content Copyrights [Member] Xunlei Kankan and online game business [Member] Subsequent Event [Member] Lawsuits | Mar. 31, 2015 Content Copyrights [Member] Online video services [Member] Subsequent Event [Member] Lawsuits | Dec. 31, 2014 Online game licenses [Member] USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total lease expenses |  |  |  |  |  |  |  |  | $ 3,068,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_LeaseArrangementTypeAxis = xnet_RentalCommitmentsMember | $ 2,786,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_LeaseArrangementTypeAxis = xnet_RentalCommitmentsMember | $ 2,390,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_LeaseArrangementTypeAxis = xnet_RentalCommitmentsMember | $ 40,373,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_LeaseArrangementTypeAxis = xnet_BandwidthLeaseCommitmentsMember | $ 35,454,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_LeaseArrangementTypeAxis = xnet_BandwidthLeaseCommitmentsMember | $ 22,211,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_LeaseArrangementTypeAxis = xnet_BandwidthLeaseCommitmentsMember |  |  |  |  |
Irrevocable purchase obligations |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,789,600 us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CopyrightsMember |  |  |  |
Legal and litigation related expenses | 1,073,000 us-gaap_LitigationSettlementExpense |  | 263,000 us-gaap_LitigationSettlementExpense | 760,000 us-gaap_LitigationSettlementExpense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits pending |  |  |  |  |  |  | 24 us-gaap_LossContingencyPendingClaimsNumber / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 2 us-gaap_LossContingencyPendingClaimsNumber / us-gaap_LitigationCaseAxis = xnet_XunleiKankanAndOnlineGameBusinessMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |  |  |  | 22 us-gaap_LossContingencyPendingClaimsNumber / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CopyrightsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 12 us-gaap_LossContingencyPendingClaimsNumber / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CopyrightsMember / us-gaap_LitigationCaseAxis = xnet_XunleiKankanAndOnlineGameBusinessMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 10 us-gaap_LossContingencyPendingClaimsNumber / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CopyrightsMember / us-gaap_LitigationCaseAxis = xnet_OnlineVideoServicesMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Aggregate amount of claimed damages | 310,000 us-gaap_LossContingencyDamagesSoughtValue | 1,880,000 us-gaap_LossContingencyDamagesSoughtValue |  |  | 1,370,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 8,400,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued litigation related expenses | 451,000 us-gaap_LitigationReserveCurrent |  | 288,000 us-gaap_LitigationReserveCurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional aggregate amount of claimed damages |  |  |  |  | $ 350,000 xnet_LossContingencyAdditionalDamagesSoughtValue / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 2,170,000 xnet_LossContingencyAdditionalDamagesSoughtValue / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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