Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Lease and other revenue									$ 48,600
Lease and other revenue										$ 44,604	$ 24,388
Total revenue	$ 247,748	$ 276,839	$ 306,170	$ 300,494	$ 313,133	$ 316,171	$ 305,747	$ 283,105	1,131,251	1,218,156	1,010,466
United States
Disaggregation of Revenue [Line Items]
Total revenue									861,001	959,167	770,843
Canada
Disaggregation of Revenue [Line Items]
Total revenue									70,314	79,816	79,186
Middle East
Disaggregation of Revenue [Line Items]
Total revenue									60,064	53,516	48,899
Europe
Disaggregation of Revenue [Line Items]
Total revenue									51,965	38,669	28,112
Latin America
Disaggregation of Revenue [Line Items]
Total revenue									32,408	33,976	34,350
Australia
Disaggregation of Revenue [Line Items]
Total revenue									30,841	33,247	23,667
Asia-Pacific and other
Disaggregation of Revenue [Line Items]
Total revenue									24,658	19,765	25,409
Reporting segments
Disaggregation of Revenue [Line Items]
Total revenue									1,131,251	1,218,156	1,010,466
Product revenue
Disaggregation of Revenue [Line Items]
Revenue									1,000,630	1,090,218	922,692
Service revenue
Disaggregation of Revenue [Line Items]
Revenue									82,021	83,334	63,386
Drilling Technologies | Reporting segments
Disaggregation of Revenue [Line Items]
Total revenue									246,887	285,565	227,653
Production & Automation Technologies
Disaggregation of Revenue [Line Items]
Total revenue									884,364	932,591	782,813
Production & Automation Technologies | Reporting segments
Disaggregation of Revenue [Line Items]
Total revenue									884,364	932,591	782,813
Production & Automation Technologies | Intra-segment eliminations
Disaggregation of Revenue [Line Items]
Total revenue									(1,020)	(1,040)	(5,131)
Production & Automation Technologies | Artificial lift | Reporting segments
Disaggregation of Revenue [Line Items]
Total revenue									687,607	725,584	602,287
Production & Automation Technologies | Digital products | Reporting segments
Disaggregation of Revenue [Line Items]
Total revenue									134,660	119,293	82,093
Production & Automation Technologies | Other production equipment | Reporting segments
Disaggregation of Revenue [Line Items]
Total revenue									$ 63,117	$ 88,754	$ 103,564