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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Related Party Transactions (Details) - USD ($) $ in Thousands			3 Months Ended
	Feb. 12, 2018	Jan. 25, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Tax savings payable to TRA Holders (as a percent)	85.00%
Total TRA liability			$ 224,542
Tax Receivable Agreement Liability			224,500
Certain direct and indirect holders of CW Units
Related Party Transaction [Line Items]
Tax savings payable to TRA Holders (as a percent)	85.00%
Short-term rental agreement \| Cactus LLC
Related Party Transaction [Line Items]
Expenses under related party agreements			100	$ 100
Short-term rental agreement \| Maximum \| Cactus LLC
Related Party Transaction [Line Items]
Accounts payable to related party			100		$ 100
Cactus LLC
Related Party Transaction [Line Items]
Distribution received from subsidiary			$ 200
Cactus LLC \| Cactus LLC
Related Party Transaction [Line Items]
Cash distribution to pre-IPO owners		$ 26,000