CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Total revenues	$ 544,135	$ 341,191	$ 155,048
Costs and expenses
Selling, general and administrative expenses	40,529	27,177	19,207
Total costs and expenses	366,434	252,328	144,433
Income from operations	177,701	88,863	10,615
Interest expense, net	(3,595)	(20,767)	(20,233)
Other income (expense), net	(4,305)		2,251
Income before income taxes	169,801	68,096	(7,367)
Income tax expense	19,520	1,549	809
Net income (loss)	150,281	66,547	(8,176)
Less: pre-IPO net income (loss) attributable to Cactus LLC	13,648	66,547	(8,176)
Less: net income attributable to non-controlling interest	84,950
Net income attributable to Cactus Inc.	51,683
Product revenue
Revenues
Total revenues	290,496	189,091	77,739
Costs and expenses
Cost of revenue	174,675	124,030	62,766
Rental revenue
Revenues
Total revenues	133,418	77,469	44,372
Costs and expenses
Cost of revenue	55,015	40,519	33,990
Field service and other revenue
Revenues
Total revenues	120,221	74,631	32,937
Costs and expenses
Cost of revenue	$ 96,215	$ 60,602	$ 28,470
Class A Common Stock
Costs and expenses
Earnings per Class A Share - basic	$ 1.60
Earnings per Class A Share - diluted	$ 1.58
Weighted average Class A Shares outstanding - basic	32,329
Weighted average Class A Shares outstanding - diluted	32,695