Income Taxes - Deferred Tax (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Components of deferred tax assets and liabilities
Investment in Cactus LLC	$ 292,956	$ 224,485
Imputed interest	12,297	10,333
Tax credits	3,713	5,719
Net operating loss carryforwards	11,198	2,333
Other	152	546
Deferred tax assets	320,316	243,416
Valuation allowance	(17,242)	(26,813)
Deferred tax asset, net	303,074	216,603
Foreign withholding taxes	854	562
Other	318	224
Deferred tax liability, net	$ 1,172	$ 786