Related Party Transactions and Arrangements - Investments in SMTA (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
May 31, 2018 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2018 |
|
| Related Party Transaction [Line Items] | ||||
| Preferred stock, shares issued | 6,900,000 | 6,900,000 | ||
| Dividend rate | 6.00% | |||
| Preferred stock, liquidation preference (in USD per share) | $ 25 | |||
| Preferred dividend income from SMTA | $ 3,750 | $ 0 | ||
| Preferred equity investment in SMTA | 150,000 | $ 150,000 | ||
| Affiliated Entity | ||||
| Related Party Transaction [Line Items] | ||||
| Preferred dividend income from SMTA | 3,800 | |||
| Dividends receivable | $ 3,800 | $ 3,800 | ||
| Spirit MTA REIT | Affiliated Entity | ||||
| Related Party Transaction [Line Items] | ||||
| Preferred stock, shares issued | 6,000,000 | |||
| Aggregate liquidation preference amount | $ 150,000 | |||
| Dividend rate | 10.00% | |||
| Preferred stock, liquidation preference (in USD per share) | $ 25 | |||
| Liquidation value on a quarterly basis (in USD per share) | 0.625 | |||
| Liquidation value on an annual basis (in USD per share) | $ 2.50 | |||