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Income Taxes - Summary of Net Operating Loss Carryforwards (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards $ 538,880
France [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards 266,509
United States - various states [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards 132,213
Luxembourg [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards 25,034
Japan [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards 22,245
Australia [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards 16,433
Germany [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards 14,127
Netherlands [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards 13,063
All Other [Member]  
Operating Loss Carryforwards [Line Items]  
Net Operating Loss Carryforwards $ 49,256