Other Assets - Additional Information (Details) - loan	1 Months Ended	12 Months Ended
	Aug. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Secured Loan Collateralized by Mortgage Servicing Rights
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, renewal option, term	1 year
Participation Interest in a Secured Loan Collateralized by Mortgage Servicing Rights | LIBOR
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, basis spread on variable rate		5.82%	6.06%
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Number of loans		1	2
Weighted average years to maturity			1 year 8 months 12 days
Weighted average coupon rate		10.19%	10.69%