Cover page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 21, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-38183
Entity Registrant Name	RANGER ENERGY SERVICES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-5449572
Entity Address, Address Line One	800 Gessner Street
Entity Address, Address Line Two	Suite 1000
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77024
City Area Code	713
Local Phone Number	935-8900
Title of 12(b) Security	Class A Common Stock, $0.01 par value
Trading Symbol	RNGR
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Central Index Key	0001699039
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		8,528,762
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		6,866,154