Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net income attributable to Cactus Inc.	$ 20,616	$ 11,559
Net income attributable to non-controlling interest	4,953	2,874
Net income attributable to Cactus Inc. - diluted	$ 25,569	$ 14,433
Denominator:
Effect of dilutive shares (in shares)	16,874	26,608
Corporate effective income tax rate, if-converted method	26.00%	25.00%
Class A Common Stock
Denominator:
Weighted average Class A Shares Outstanding - basic (in shares)	59,288	49,166
Weighted average Class A shares outstanding - diluted (in shares)	76,162	75,774
Earnings per Class A share - basic (in dollars per share)	$ 0.35	$ 0.24
Earnings per Class A share - diluted (in dollars per share)	$ 0.34	$ 0.19