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Other Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Lease deposits $ 9,720 $ 9,983
Derivative instruments 1,075 3,433
Deposits with statutory authorities 6,108 6,252
Term deposits 2,098 1,983
Contract assets 3,868 3,977
Deferred contract fulfillment costs 4,773 5,582
Others 4,403 4,806
Other assets $ 32,045 $ 36,016