Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Related Party Transactions (Details) $ in Thousands					3 Months Ended		9 Months Ended
Related Party Transactions (Details) $ in Thousands	Jul. 16, 2018 USD ($)	Feb. 12, 2018 USD ($)	Feb. 11, 2018 USD ($) item	Jan. 25, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items]
Tax savings payable to TRA Holders (as a percent)	85.00%	85.00%
Liability related to tax receivable agreement	$ 98,800	$ 63,000			$ 161,797		$ 161,797
Cactus LLC
Related Party Transaction [Line Items]
Distribution received from subsidiary					1,600		3,800
Cash distribution to pre-IPO owners				$ 26,000
Certain direct and indirect holders of CW Units
Related Party Transaction [Line Items]
Tax savings payable to TRA Holders (as a percent)		85.00%
Management service agreement \| Cactus LLC
Related Party Transaction [Line Items]
Number of LLC members \| item			2
Annual management services fee total			$ 300
Number of installments \| item			4
Expenses under related party agreements							100	$ 200
Accounts payable to related party					0		0		$ 0
Short-term rental agreement \| Cactus LLC
Related Party Transaction [Line Items]
Expenses under related party agreements					100	$ 100	300	$ 200
Short-term rental agreement \| Maximum \| Cactus LLC
Related Party Transaction [Line Items]
Accounts payable to related party					100		100		$ 100
Cactus LLC
Related Party Transaction [Line Items]
Distributions to LLC members made by subsidiary					$ 1,600		$ 5,800