BUSINESS SEGMENT INFORMATION - Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenues:
Revenues	$ 243,777	$ 334,656
Operating (loss) income:
Operating loss	(218,707)	(2,161)
Capital expenditures	25,019	62,280
Depreciation and amortization	39,293	42,505
Assets	869,132		$ 1,053,218
Identifiable assets	897,630	1,226,492
Impairment and Other Charges	205,536
Gain (Loss) On Disposition Of Assets	819	3,504
Interest expense	113	89
Interest income	334	800
Other (expense) income , net	(308)	445
Loss before income taxes	(218,794)	(1,005)
Technical Services
Revenues:
Revenues	227,700	314,079
Operating (loss) income:
Operating loss	(12,207)	(4,457)
Capital expenditures	20,338	59,889
Depreciation and amortization	36,995	39,902
Identifiable assets	654,354	969,036
Support Services
Revenues:
Revenues	16,077	20,577
Operating (loss) income:
Operating loss	1,547	3,137
Capital expenditures	4,681	2,069
Depreciation and amortization	2,228	2,511
Identifiable assets	70,022	82,111
Corporate
Operating (loss) income:
Operating loss	(3,330)	(4,345)
Capital expenditures		322
Depreciation and amortization	70	92
Identifiable assets	$ 173,254	$ 175,345