Document and Entity Information - shares
9 Months Ended
Sep. 30, 2017
Oct. 31, 2017
Document Information [Line Items]    
Entity Registrant Name SPIRIT REALTY CAPITAL, INC.  
Trading Symbol SRC  
Entity Central Index Key 0001308606  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   455,897,075
Spirit Realty, L.P.    
Document Information [Line Items]    
Entity Registrant Name SPIRIT REALTY, L.P.  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q3  
Amendment Flag false