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Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Derivative instruments $ 4,076 $ 4,059
Advances to suppliers 1,581 2,910
Receivables from statutory authorities 12,608 14,145
Contract assets 1,414 1,201
Deferred contract fulfillment costs 1,673 1,236
Others 3,242 4,689
Other current assets $ 24,594 $ 28,240