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Fair Value - Additional Information (Details)
₨ in Millions
Dec. 31, 2015
USD ($)
Dec. 31, 2015
INR (₨)
Dec. 31, 2014
USD ($)
Dec. 31, 2014
INR (₨)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Transfers of financial instruments between levels $ 0   $ 0  
Transfers of financial instruments between level 2 to level 1 0   0  
Notional value of foreign currency forward 13,000,000 ₨ 850.0 $ 10,900,000 ₨ 700.0
Nonrecurring | Level 3        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Goodwill, fair value 0      
Assets of businesses held for sale, fair value $ 24,400,000