Revenues, Contract Assets and Contract Liabilities - Schedule of Geographical Information of Revenue from External Customer (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Total Revenues	$ 113,883	$ 88,969	$ 221,051	$ 176,129
Colombia [Member]
Total Revenues	12,165	15,557	25,153	37,381
United States [Member]
Total Revenues	99,326	69,852	191,360	132,845
Panama [Member]
Total Revenues	913	1,043	1,676	1,857
Other [Member]
Total Revenues	$ 1,479	$ 2,517	$ 2,862	$ 4,046