Summary of Significant Accounting Policies - Operating Real Estate (Details) - USD ($) $ in Millions |
8 Months Ended | 12 Months Ended | |
---|---|---|---|
Aug. 31, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Real Estate [Line Items] | |||
Impairment loss | $ 31.0 | $ 5.0 | |
Winterfell | |||
Real Estate [Line Items] | |||
Impairment loss | 24.0 | ||
Kansas City | |||
Real Estate [Line Items] | |||
Impairment loss | 4.4 | ||
Peregrine Senior Living | |||
Real Estate [Line Items] | |||
Impairment loss | $ 10.1 | ||
Watermark | |||
Real Estate [Line Items] | |||
Impairment loss | $ 2.8 |