Equity (Details) - USD ($)					3 Months Ended			9 Months Ended		12 Months Ended	53 Months Ended
	Sep. 13, 2021	Jun. 17, 2021	Mar. 12, 2021	Mar. 09, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Jun. 30, 2022
Equity
Effect of CW Unit redemptions					$ 0	$ 0		$ 0	$ 0
TRA liability increase			$ 46,700,000			7,500,000	$ 33,100,000
Tax benefit (expense)					$ (12,041,000)	$ (3,290,000)		$ (23,498,000)	$ (586,000)
Tax benefit for partial valuation allowance		$ 3,000,000	5,100,000
Cash dividend declared (in dollars per share)					$ 0.11	$ 0.10		$ 0.33	$ 0.28
Pro rata distributions made to other members								$ 8,007,000	$ 8,074,000
Additional Paid-In Capital
Equity
Effect of CW Unit redemptions					$ (894,000)	$ (6,743,000)	(26,900,000)	(12,039,000)	(78,654,000)
Non-controlling Interest
Equity
Effect of CW Unit redemptions					$ 895,000	6,752,000	$ 26,900,000	$ 12,054,000	78,763,000
Cactus LLC
Equity
Ownership interest								80.00%		78.00%
Cactus Inc
Equity
Cash distributions to unit holders								$ 31,700,000	24,700,000
CW Unit Holders other than Cactus, Inc.
Equity
Pro rata distributions made to other members								$ 8,000,000	$ 8,100,000
CW Unit Holders other than Cactus, Inc. | Cactus LLC
Equity
CW Unit redemptions (in shares)	715,215	3,300,000
Common Units transferred (in shares)	228,878	944,093
Proceeds from issuance of common stock		$ 0
Cactus Wellhead LLC Agreement | Additional Paid-In Capital
Equity
Effect of CW Unit redemptions						(6,800,000)
Cactus Wellhead LLC Agreement | Non-controlling Interest
Equity
Effect of CW Unit redemptions						6,800,000
March 2021 Secondary Offering | Additional Paid-In Capital
Equity
Effect of CW Unit redemptions			(45,000,000)
March 2021 Secondary Offering | Non-controlling Interest
Equity
Effect of CW Unit redemptions			45,000,000
March 2021 Secondary Offering | Other Nonoperating Income (Expense)
Equity
Offering expenses			$ 400,000
Class A Common Stock
Equity
Common stock, shares outstanding (in shares)					60,719,000			60,719,000		59,035,000
Shares outstanding, percentage of total voting power					80.00%			80.00%
Cash dividend declared (in dollars per share)								$ 0.33	$ 0.28
Dividends declared								$ 20,100,000	$ 15,300,000
Dividends paid								$ 20,000,000	$ 15,200,000
Class A Common Stock | CW Unit Holders other than Cactus, Inc. | Cactus LLC
Equity
Shares issued (in shares)	715,215	3,300,000
Tax benefit (expense)						$ 700,000
Class A Common Stock | Cactus Wellhead LLC Agreement
Equity
CW Unit redemptions (in shares)						192,459	425,433	1,500,000			45,400,000
Class A Common Stock | March 2021 Secondary Offering
Equity
CW Unit redemptions (in shares)			6,272,500
Shares sold (in shares)				6,325,000
Price of stock (in dollars per share)				$ 30.555
Other shares sold (in shares)			52,500
Class B Common Stock
Equity
Common stock, shares outstanding (in shares)					15,159,000			15,159,000		16,674,000
Shares outstanding, percentage of total voting power					20.00%			20.00%