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Other Investments - Servicing Advance Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Schedule of Investments [Line Items] |  |
Total Servicer Advance Receivables | $ 282,743 | $ 151,582
Residential Loans |  |
Schedule of Investments [Line Items] |  |
Principal and interest advances | 113,612 | 15,081
Escrow advances (taxes and insurance advances) | 117,876 | 96,732
Corporate advances | $ 51,255 | $ 39,769

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