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Redeemable Non-controlling Interests - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2013 | Dec. 15, 2016
Redeemable Noncontrolling Interest [Line Items] |  |  |
Proceeds related to trivago IPO, net of fees and expenses | $ 209,903 |  |
trivago |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Percentage of remaining minority ownership interest that may be acquired |  | 50.00% |
Percentage of remaining minority ownership interest to be acquired |  | 100.00% |
trivago |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Ownership interest percentage | 59.70% |  | 63.50%
Voting interest percentage | 64.70% |  |

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- Definition Percentage of remaining shares of minority interest that may be acquired during the open window. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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