Commitments and Contingencies (Details) - Mortgage notes receivables - Geographic concentration risk	12 Months Ended
Dec. 31, 2021 State Country	Dec. 31, 2020
Concentration Risk [Line Items]
Number of states in mortgage loans were originated \| State	19
Number of counties in which loan portfolio concentrated \| Country	10
Major Country
Concentration Risk [Line Items]
Concentration risk percentage	46.60%	43.20%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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