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Business Segments (Revenue by Product Lines) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Revenues	$ 541,068	$ 512,476
Percentage of net sales	100.00%	100.00%
Operating Segments | Sales | Drilling Technologies | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ 96,680	$ 97,232
Percentage of net sales	17.80%	19.10%
Operating Segments | Sales | Downhole Technologies | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ 69,215	$ 64,083
Percentage of net sales	12.80%	12.50%
Operating Segments | Sales | Subsea Technologies | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ 74,000	$ 55,521
Percentage of net sales	13.70%	10.80%
Operating Segments | Sales | Stimulation and Intervention | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ 96,731	$ 56,460
Percentage of net sales	17.90%	11.00%
Operating Segments | Sales | Coiled Tubing | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ 88,287	$ 62,225
Percentage of net sales	16.30%	12.10%
Operating Segments | Sales | Production Equipment | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ 60,981	$ 65,763
Percentage of net sales	11.30%	12.80%
Operating Segments | Sales | Valve Solutions | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ 55,729	$ 111,747
Percentage of net sales	10.30%	21.80%
Eliminations
Revenue from External Customer [Line Items]
Revenues	$ (555)	$ (555)
Eliminations | Sales | Product Concentration Risk
Revenue from External Customer [Line Items]
Revenues	$ (555)	$ (555)
Percentage of net sales	(0.10%)	(0.10%)

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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