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Fair Value Measurements - Narrative (Details) $ in Thousands |  | 6 Months Ended |
--- | --- | --- | ---
Dec. 14, 2018 USD ($) | Jun. 30, 2019 USD ($) loan | Dec. 31, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Payment of earn-out consideration | $ 25,000 |  |
Percentage of performance distributions (percent) | 37.25% |  |
Common equity invested (percent) | 2.50% |  |
Number of mortgage loans (in loan) | loan |  | 6 |
Recurring basis |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value of earn-outs |  | $ 4,380 | $ 29,380

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