SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of the quarterly operating results
Revenues	$ 103,635	$ 85,444	$ 106,787	$ 122,722	$ 144,424	$ 124,162	$ 174,276	$ 146,141	$ 418,588	$ 589,003	$ 539,053
Gross profit	11,955	12,937	9,286	14,811	8,945	14,932	17,948	10,772	48,989	52,597	73,334
(Loss) income from continuing operations	$ (6,986)	$ (6,730)	$ (20,112)	$ (9,785)	$ (17,992)	$ (51,805)	$ (3,898)	$ (5,034)	$ (43,613)	$ (78,729)	$ (47,234)
Earnings per common share from continuing operations:
Basic earnings per common share from continuing operations (in dollars per share)	$ (0.40)	$ (0.39)	$ (1.16)	$ (0.57)	$ (1.05)	$ (3.02)	$ (0.23)	$ (0.29)	$ (2.51)	$ (4.59)	$ (2.78)
Diluted (loss) earnings per common share from continuing operations	$ (0.40)	$ (0.39)	$ (1.16)	$ (0.57)	$ (1.05)	$ (3.02)	$ (0.23)	$ (0.29)	$ (2.51)	$ (4.59)	$ (2.78)