Industry Segments - Revenue, Income from Operations, and Assets by Reporting Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Industry Segments Details [Line Items]
Revenues	$ 288,796	$ 260,072	$ 532,524	$ 459,453
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(5,711)	(9,686)	(22,776)	(29,619)
Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	79,767	76,556	141,348	129,660
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	14,614	9,981	20,800	12,430
Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	73,124	83,646	151,802	144,721
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,460	8,311	4,691	14,859
Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	135,905	99,924	239,374	185,346
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(3,483)	(8,655)	(11,284)	(22,673)
Interdivision Eliminations [Member]
Industry Segments Details [Line Items]
Revenues	0	(54)	0	(274)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1	4	7	4
Corporate Overhead [Member]
Industry Segments Details [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(19,303)	(19,327)	(36,990)	(34,239)
Product [Member]
Industry Segments Details [Line Items]
Revenues	135,350	107,687	227,131	183,066
Product [Member] | Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	72,806	72,287	130,134	123,344
Product [Member] | Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	367	0	731	676
Product [Member] | Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	62,177	35,400	96,266	59,046
Service [Member]
Industry Segments Details [Line Items]
Revenues	153,446	152,385	305,393	276,387
Service [Member] | Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	6,961	4,268	11,214	6,317
Service [Member] | Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	72,757	83,593	151,071	143,770
Service [Member] | Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	$ 73,728	$ 64,524	$ 143,108	$ 126,300