Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2018
Nov. 02, 2018
Entity Registrant Name Rosehill Resources Inc.  
Central Index Key 0001659122  
Document Type 10-Q  
Trading Symbol ROSE  
Document Period-End Date Sep. 30, 2018  
Amendment Flag false  
Entity Ex Transition Period false  
Current Fiscal Year-End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Emerging Growth Company true  
Small Business false  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2018  
Class A Common Stock    
Common Stock Outstanding (shares)   13,731,596
Class B Common Stock    
Common Stock Outstanding (shares)   29,807,692