Loans - Schedule of Concentration Risk (Details) - Owners of rental properties - Financing receivable	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Residential
Concentration Risk [Line Items]
Concentration of loans (as a percent)	18.99%	19.95%
Commercial
Concentration Risk [Line Items]
Concentration of loans (as a percent)	14.62%	16.09%

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
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