v3.10.0.1
Document and Entity Information Document - shares
9 Months Ended
Sep. 30, 2018
Oct. 31, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name Stratus Properties Inc.  
Entity Central Index Key 0000885508  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business true  
Document Type 10-Q  
Document Period End Date Sep. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   8,164,370
Entity Current Reporting Status Yes