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Industry Segments - Revenue, Income from Operations, and Assets by Reporting Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Industry Segments Details [Line Items]
Revenues	$ 243,728	$ 199,381
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(17,065)	(19,933)
Income (loss) before taxes	(18,674)	(21,057)
Assets	(1,459,525)		$ (1,385,527)
Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	61,581	53,104
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	6,186
Income (loss) before taxes		2,449
Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	78,678	61,075
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,231
Income (loss) before taxes		6,548
Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	103,469	85,422
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(7,801)	(14,018)
Interdivision Eliminations [Member]
Industry Segments Details [Line Items]
Revenues	0	(220)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	6
Income (loss) before taxes		0
Corporate Overhead [Member]
Industry Segments Details [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(17,687)	(14,912)
Income (loss) before taxes	(17,687)	(14,912)
Product [Member]
Industry Segments Details [Line Items]
Revenues	91,781	75,953
Product [Member] \| Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	57,328	51,057
Product [Member] \| Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	364	1,250
Product [Member] \| Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	34,089	23,646
Service [Member]
Industry Segments Details [Line Items]
Revenues	151,947	123,428
Service [Member] \| Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	4,253	2,049
Service [Member] \| Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	78,314	59,603
Service [Member] \| Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	$ 69,380	$ 61,776