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Revenues, Contract Assets and Contract Liabilities - Schedule of Geographical Information of Revenue from External Customer (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Total Revenues $ 107,168 $ 87,160
Colombia [Member]    
Total Revenues 12,959 21,824
United States [Member]    
Total Revenues 92,062 62,993
Panama [Member]    
Total Revenues 763 814
Other [Member]    
Total Revenues $ 1,384 $ 1,529