Industry Segments - Revenue, Income from Operations, and Assets by Reporting Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Industry Segments Details [Line Items]
Revenues	$ 245,947	$ 256,851	$ 778,471	$ 716,304
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(7,500)	(12,948)	(30,276)	(42,567)
Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	59,340	63,073	200,688	192,733
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	11,318	8,713	32,118	21,143
Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	72,841	78,568	224,643	223,289
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,578	5,809	7,269	20,668
Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	113,766	115,261	353,140	300,607
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(3,464)	(7,844)	(14,748)	(30,517)
Interdivision Eliminations [Member]
Industry Segments Details [Line Items]
Revenues	0	(51)	0	(325)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(1)	5	6	9
Corporate Overhead [Member]
Industry Segments Details [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(17,931)	(19,631)	(54,921)	(53,870)
Product [Member]
Industry Segments Details [Line Items]
Revenues	93,377	102,070	320,508	285,136
Product [Member] | Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	55,444	58,050	185,578	181,394
Product [Member] | Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	100	941	831	1,617
Product [Member] | Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	37,833	43,079	134,099	102,125
Service [Member]
Industry Segments Details [Line Items]
Revenues	152,570	154,781	457,963	431,168
Service [Member] | Completion Fluids & Products Division [Member]
Industry Segments Details [Line Items]
Revenues	3,896	5,027	15,110	11,344
Service [Member] | Water & Flowback Services [Member]
Industry Segments Details [Line Items]
Revenues	72,741	77,572	223,812	221,342
Service [Member] | Compression Division [Member]
Industry Segments Details [Line Items]
Revenues	$ 75,933	$ 72,182	$ 219,041	$ 198,482