Segment Data - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues
Total revenues	$ 141,172	$ 164,550
Operating income (loss)
Total operating income (loss)	544	(5,886)
Fluids systems
Revenues
Total revenues	87,849	132,805
Industrial solutions
Revenues
Total revenues	53,323	31,745
Operating segments | Fluids systems
Revenues
Total revenues	87,849	132,805
Operating income (loss)
Total operating income (loss)	(6,767)	(2,268)
Operating segments | Industrial solutions
Revenues
Total revenues	53,323	31,745
Operating income (loss)
Total operating income (loss)	13,130	3,062
Corporate office
Operating income (loss)
Total operating income (loss)	$ (5,819)	$ (6,680)