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Fair Value - Additional Information (Details)
₨ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2016
INR (₨)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
INR (₨)
Dec. 31, 2015
USD ($)
Fair Value Disclosures [Abstract]            
Transfers of financial instruments between levels       $ 0   $ 0
Transfers of financial instruments between level 2 to level 1       0   0
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Notional value of foreign currency forward     ₨ 735.0 10,700,000 ₨ 850.0 $ 13,000,000
Level 3 | Minimum            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Receivables exposure, undiscounted       0    
Level 3 | Maximum            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Receivables exposure, undiscounted       $ 4,600,000    
Receivable from sold investment            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Unrealized gain during the period $ 980,000 $ 0        
Receivable from sold investment | Investment income and other, net            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Unrealized gain during the period $ 1,000,000