Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income attributable to Cactus Inc.	$ 49,593	$ 34,446	$ 85,612
Net income attributable to non-controlling interest	13,744	19,934	56,012
Net income attributable to Cactus Inc. - diluted	$ 63,337	$ 54,380	$ 141,624
Denominator:
Effect of dilutive shares (in shares)	20,709	28,038	30,370
Corporate effective interest rate, if-converted method	27.00%	24.00%	24.00%
Class A Common Stock
Denominator:
Weighted average Class A Shares Outstanding - basic (in shares)	55,398	47,457	44,983
Weighted average Class A shares outstanding - diluted (in shares)	76,107	75,495	75,353
Earnings per Class A share - basic (in dollars per share)	$ 0.90	$ 0.73	$ 1.90
Earnings per Class A share - diluted (in dollars per share)	$ 0.83	$ 0.72	$ 1.88