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Related Party Transactions (Details) $ in Thousands				12 Months Ended
Related Party Transactions (Details) $ in Thousands	Feb. 12, 2018	Feb. 11, 2018 USD ($) item installment	Jan. 25, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items]
Tax savings payable to TRA Holders (as a percent)	85.00%			85.00%
Total TRA liability				$ 216,500
Tax Receivable Agreement Liability				216,500
Tax Receivable Agreement, Liability Non Current				201,902	$ 138,015
Cactus LLC
Related Party Transaction [Line Items]
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%
Tax Receivable Agreement, Liability Non Current				216,500
Due from Related Parties, Current				300
Management service agreement
Related Party Transaction [Line Items]
Expenses under related party agreements					100	$ 300
Accounts payable to related party				0	0
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 \| installment		4
Short-term rental agreement \| Company owned by member of Cactus LLC
Related Party Transaction [Line Items]
Expenses under related party agreements				300	400	$ 300
Short-term rental agreement \| Maximum \| Company owned by member of 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				14,200	3,800
Distributions to LLC members made by subsidiary				$ 8,400	$ 5,800