Related Party Transactions - Cost Sharing Arrangements (Details) - Spirit MTA REIT - Affiliated Entity - USD ($)
7 Months Ended
May 31, 2018
Dec. 31, 2018
Related Party Transaction [Line Items]    
Loan receivable to related party $ 3,000,000  
Due from related parties   $ 69,000
Due to related parties   1,800,000
Rent Reimbursement    
Related Party Transaction [Line Items]    
Due from related parties $ 2,000,000  
Rent reimbursement receivable period 60 days  
Related party transaction   $ 2,000,000