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Income Taxes Narratives (Details) - Orbitz - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Entity Information [Line Items]            
Provision for income taxes $ 3,444,000 $ 5,794,000 $ 2,801,000 $ 13,048,000 $ 27,281,000  
Decrease in income tax expense (benefit) 2,400,000   10,200,000      
Deferred Tax Assets, Net of Valuation Allowance 145,000,000   145,000,000   146,300,000  
Unrecognized tax benefits 3,300,000   3,300,000   3,348,000 $ 3,569,000
Unrecognized tax benefits, would impact effective tax rate $ 3,300,000   3,300,000   $ 3,300,000  
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations     $ 0