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Significant Accounting Policies - Additional Information (Details)
$ in Millions
1 Months Ended 3 Months Ended
Oct. 31, 2016
investee
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2016
Mar. 10, 2015
JV          
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]          
Ownership percentage 10.00% 50.00%      
VIE          
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]          
Ownership percentage 10.00% 50.00%      
Number of other parties | investee 9        
Minimum          
Goodwill and intangible assets          
Amortization period   1 year      
Foreign currency translation and foreign currency forward contracts          
Fixed assets, useful life   3 years      
Maximum          
Goodwill and intangible assets          
Amortization period   6 years      
Foreign currency translation and foreign currency forward contracts          
Fixed assets, useful life   7 years      
Investment Income and Other, Net          
Foreign currency translation and foreign currency forward contracts          
Gain (loss) on foreign currency transactions | $   $ 0.2 $ 0.4    
Senior Secured Notes | 6.875% Senior Secured Notes          
Repurchases of debt          
Interest rate (percent)   6.875% 6.875% 6.875% 6.875%
Software          
Goodwill and intangible assets          
Amortization period   3 years