Related Party Transactions and Arrangements - Property Management and Servicing Agreement (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
May 20, 2014 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Dec. 31, 2018 |
|
| Related Party Transaction [Line Items] | ||||||
| Related party fee income | $ 54,795 | $ 6,750 | $ 68,971 | $ 8,969 | ||
| Affiliated Entity | Property Management | ||||||
| Related Party Transaction [Line Items] | ||||||
| Annual management fees rate | 0.25% | |||||
| Related party fee income | 1,300 | 1,600 | 4,300 | 2,100 | ||
| Affiliated Entity | Special Servicing Fees | ||||||
| Related Party Transaction [Line Items] | ||||||
| Annual management fees rate | 0.75% | |||||
| Related party fee income | $ 400 | $ 190 | $ 1,200 | $ 242 | ||
| Affiliated Entity | Property Management and Servicing Agreement | ||||||
| Related Party Transaction [Line Items] | ||||||
| Due from related parties | $ 500 | |||||