Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended	80 Months Ended
	Jan. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Sep. 30, 2024	Jun. 06, 2023
Equity
Issuances of common stock						$ 169,369
CW Unit redemptions (in shares)					1,100,000	900,000
Cash dividend declared (in dollars per share)		$ 0.13	$ 0.12		$ 0.37	$ 0.34
Share repurchases					$ 3,372	$ 159
Pro rata distributions made to other members					10,444	13,926
Share Repurchase Program
Equity
Authorized amount of stock repurchase									$ 150,000
Additional Paid-In Capital
Equity
Costs associated with stock issuance	$ 2,200
Issuances of common stock						143,302
Share repurchases					$ 2,996	137
Common stock | Share Repurchase Program
Equity
Common stock purchased and retired (in shares)					86,599
Share repurchases					$ 3,400
Average stock repurchased price (in dollars per share)					$ 38.92
Common stock authorized repurchase amount		$ 146,300			$ 146,300			$ 146,300
FlexSteel | Key Employee
Equity
Issuance of common stock (in shares)				128,150
Issuances of common stock				$ 6,500
Vesting period				1 year
Cactus Companies
Equity
Ownership interest					83.80%
Cactus LLC
Equity
Ownership interest							82.30%
Cactus Inc
Equity
Cash distributions to unit holders					$ 51,900	63,100
CC Unit Holders other than Cactus, Inc.
Equity
Pro rata distributions made to other members					$ 10,400	$ 13,900
Class A Common Stock
Equity
Common stock, shares outstanding (in shares)		66,656,000			66,656,000		65,409,000	66,656,000
Shares outstanding, percentage of total voting power		83.80%			83.80%			83.80%
Cash dividend declared (in dollars per share)					$ 0.37	$ 0.34
Dividends declared					$ 24,900	$ 22,300
Dividends paid					24,800	$ 22,300
Class A Common Stock | Common stock
Equity
Issuance of common stock (in shares)						3,352,000
Issuances of common stock						$ 34
Share repurchases					$ 1
Class A Common Stock | Additional Offering
Equity
Shares sold (in shares)	3,224,300
Price of stock (in dollars per share)	$ 51.36
Cash consideration	$ 165,600
Underwriting discounts	$ 6,900
Class A Common Stock | Cactus Companies LLC Agreement
Equity
CW Unit redemptions (in shares)								47,600,000
Class B Common Stock
Equity
Common stock, shares outstanding (in shares)		12,928,000			12,928,000		14,034,000	12,928,000
Shares outstanding, percentage of total voting power		16.20%			16.20%			16.20%
Class B Common Stock | Cactus Companies
Equity
Shares owned per units held (in shares)		1			1			1