GEOGRAPHIC AND RELATED INFORMATION - Revenues and Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Customer A
Revenue, Major Customer [Line Items]
Revenues from Services, Amount	$ 74,407
Revenues from Services, % of Consolidated	36.00%
Customer B
Revenue, Major Customer [Line Items]
Revenues from Services, Amount	$ 57,254	$ 83,851
Revenues from Services, % of Consolidated	28.00%	37.00%
Accounts Receivable, Net, Amount	$ 81,609	$ 50,407
Accounts Receivable, Net, % of Consolidated	76.00%	74.00%
Customer C
Revenue, Major Customer [Line Items]
Revenues from Services, Amount	$ 21,161
Revenues from Services, % of Consolidated	10.00%
Customer F
Revenue, Major Customer [Line Items]
Revenues from Services, Amount		$ 40,050
Revenues from Services, % of Consolidated		18.00%
Customer G
Revenue, Major Customer [Line Items]
Revenues from Services, Amount		$ 27,469
Revenues from Services, % of Consolidated		12.00%
Customer H
Revenue, Major Customer [Line Items]
Revenues from Services, Amount		$ 23,400
Revenues from Services, % of Consolidated		10.00%