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Assets Held for Sale and Sale of Former Hungarian Subsidiary - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2014
Entity Location [Line Items]    
Proceeds from sale of Hungarian subsidiary $ 1.5  
VAT liability $ 0.4  
Change in fair value of assets held for sale   $ 0.7
Hungary    
Entity Location [Line Items]    
Percentage of ownership before transaction 100.00%