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Other Investments - Servicing Advance Investments (Details) - Residential Loans - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investment [Line Items]
Principal and interest advances	$ 94,148	$ 110,923
Escrow advances (taxes and insurance advances)	172,847	79,279
Corporate advances	43,958	27,454
Total Servicer Advance Receivables	$ 310,953	$ 217,656

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Servicing Assets At Fair Value, Corporate Advances

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Servicing Assets At Fair Value, Escrow Advances

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Servicing Assets At Fair Value, Principal And Interest Advances

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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