Debt - Summary of Debt - Master Trust Notes (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Nov. 30, 2014
Debt Instrument [Line Items]      
Total debt, net $ 1,712,846,000 $ 2,325,014,000  
Master Trust Notes      
Debt Instrument [Line Items]      
Long-term debt, gross 2,248,504,000 1,672,706,000  
Debt discount, net (36,188,000) (18,787,000)  
Deferred financing costs, net (24,010,000) (16,376,000)  
Total debt, net 2,188,306,000 1,637,543,000  
Aggregate principal amount of debt $ 674,400,000   $ 510,000,000
Master Trust Notes | Series 2014-1 Class A1      
Debt Instrument [Line Items]      
Stated interest rate 0.00%    
Maturity 0 years    
Long-term debt, gross $ 0 53,919,000  
Master Trust Notes | Series 2014-1 Class A2      
Debt Instrument [Line Items]      
Stated interest rate 5.40%    
Maturity 2 years 6 months 18 days    
Long-term debt, gross $ 252,437,000 253,300,000  
Master Trust Notes | Series 2014-2      
Debt Instrument [Line Items]      
Stated interest rate 5.80%    
Maturity 3 years 2 months 18 days    
Long-term debt, gross $ 222,683,000 226,283,000  
Master Trust Notes | Series 2014-3      
Debt Instrument [Line Items]      
Stated interest rate 5.70%    
Maturity 4 years 2 months 18 days    
Long-term debt, gross $ 311,336,000 311,820,000  
Master Trust Notes | Series 2014-4 Class A1      
Debt Instrument [Line Items]      
Stated interest rate 3.50%   3.50%
Maturity 2 years 19 days    
Long-term debt, gross $ 150,000,000 150,000,000  
Aggregate principal amount of debt     $ 150,000,000.0
Master Trust Notes | Series 2014-4 Class A2      
Debt Instrument [Line Items]      
Stated interest rate 4.60%   4.63%
Maturity 12 years 19 days    
Long-term debt, gross $ 358,664,000 360,000,000  
Aggregate principal amount of debt     $ 360,000,000.0
Master Trust Notes | Series 2017-1 Class A      
Debt Instrument [Line Items]      
Stated interest rate 4.36%    
Maturity 4 years 11 months 19 days    
Long-term debt, gross $ 515,280,000 0  
Aggregate principal amount of debt $ 542,400,000    
Master Trust Notes | Series 2017-1 Class B      
Debt Instrument [Line Items]      
Stated interest rate 6.35%    
Maturity 4 years 11 months 19 days    
Long-term debt, gross $ 125,400,000 0  
Aggregate principal amount of debt $ 132,000,000.0    
Master Trust Notes | Total Master Trust 2014 notes      
Debt Instrument [Line Items]      
Maturity 5 years 4 months 24 days    
Long-term debt, gross $ 1,935,800,000 1,355,322,000  
Master Trust Notes | Total Master Trust 2014 notes | Weighted Average      
Debt Instrument [Line Items]      
Stated interest rate 5.00%    
Master Trust Notes | Series 2013-1 Class A      
Debt Instrument [Line Items]      
Stated interest rate 3.90%    
Maturity 11 months 19 days    
Long-term debt, gross $ 125,000,000 125,000,000  
Master Trust Notes | Series 2013-2 Class A      
Debt Instrument [Line Items]      
Stated interest rate 5.30%    
Maturity 5 years 11 months 18 days    
Long-term debt, gross $ 187,704,000 192,384,000  
Master Trust Notes | Total Master Trust 2013 notes      
Debt Instrument [Line Items]      
Maturity 3 years 11 months 19 days    
Long-term debt, gross $ 312,704,000 $ 317,384,000  
Master Trust Notes | Total Master Trust 2013 notes | Weighted Average      
Debt Instrument [Line Items]      
Stated interest rate 4.70%    
Spirit Realty, Inc. | Master Trust Notes | Series 2017-1 Class A      
Debt Instrument [Line Items]      
Aggregate principal amount of debt $ 27,100,000    
Spirit Realty, Inc. | Master Trust Notes | Series 2017-1 Class B      
Debt Instrument [Line Items]      
Aggregate principal amount of debt $ 6,600,000