Discontinued Operations - Discontinued Operations, Balance Sheet Disclosure (Details) - Spirit MTA REIT - Spinoff - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disposal Group, Including Discontinued Operation, Assets [Abstract]    
Land and improvements $ 990,575 $ 978,556
Buildings and improvements 1,702,926 1,629,555
Total real estate investments 2,693,501 2,608,111
Less: accumulated depreciation (572,075) (508,047)
Real estate investments, net 2,121,426 2,100,064
Loans receivable, net 1,501 5,698
Intangible lease assets, net 103,651 114,558
Real estate asset held for sale, net 28,460 59,709
Net investments 2,255,038 2,280,029
Cash and cash equivalents 6 4,145
Deferred costs and other assets, net 109,096 54,736
Goodwill 28,740 28,740
Total assets of discontinued operations 2,392,880 2,367,650
Liabilities    
Mortgages and notes payable, net 1,926,834 1,339,614
Intangible lease liabilities, net 24,729 30,232
Accounts payable, accrued expenses and other liabilities 17,277 12,239
Total liabilities of discontinued operations $ 1,968,840 $ 1,382,085