Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income attributable to Cactus Inc.	$ 31,425	$ 12,617	$ 79,185	$ 34,569
Net income attributable to non-controlling interest	0	3,400	19,686	9,491
Net income attributable to Cactus Inc. - diluted	$ 31,425	$ 16,017	$ 98,871	$ 44,060
Denominator:
Effect of dilutive shares (in shares)	441	17,834	16,132	21,857
Corporate effective income tax rate, if-converted method		28.00%	25.00%	28.00%
Class B Common Stock
Denominator:
Antidilutive securities excluded from computation of earnings per share (in shares)	15,200
Class A Common Stock
Denominator:
Weighted average Class A Shares Outstanding - basic (in shares)	60,665	58,248	60,164	54,188
Weighted average Class A shares outstanding - diluted (in shares)	61,106	76,082	76,296	76,045
Earnings per Class A share - basic (in dollars per share)	$ 0.52	$ 0.22	$ 1.32	$ 0.64
Earnings per Class A share - diluted (in dollars per share)	$ 0.51	$ 0.21	$ 1.30	$ 0.58