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Organization and Basis of Presentation - Additional Information (Detail) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2013 Segment Country Brand | Dec. 31, 2011 Company
Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |
Number of separate independent public companies |  | 2
Reverse stock split of outstanding capital |  | A one-for-two reverse stock split
Number of countries with localized versions of website | 29 |
Number of other travel brands with websites | 20 |
Number of reportable segment | 1 |

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- Definition Number of countries in presence of web sites. + References No definition available. + Details
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- Definition Number of other travel brands. + References No definition available. + Details
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- Definition Number of separate independent public companies. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Details
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- Definition Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section C + Details
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