Subsequent Events - Additional Information (Details) $ in Millions		9 Months Ended	12 Months Ended
	Oct. 20, 2020 USD ($) Loan	Sep. 30, 2020 Loan	Dec. 31, 2019 Loan
Subsequent Event [Line Items]
Loans Restructured, Number of Loans		0	1
Subsequent Event | COVID-19 | Payment Deferral
Subsequent Event [Line Items]
Loans Restructured, Number of Loans	419
Loan amount | $	$ 381.7
Description of forbearance agreement	All of these loans had been performing in accordance with their contractual obligations prior to the granting of the initial forbearance. Forbearance periods currently do not extend into 2021.
Termination period of forbearance agreement	2021
Number of loans not in deferment period	323
Amount of loan not to be paid in deferment period | $	$ 290.7
Number of loans in deferment period	96
Amount of loan to be paid in deferment period | $	$ 91.0
Number of loans not requested for payment	4
Loans in forbearance for which payment is yet to be made | $	$ 3.9
Number of loan requested for payment	92
Amount of loans requested for payment | $	$ 87.1
Subsequent Event | COVID-19 | Payment Deferral | Maximum
Subsequent Event [Line Items]
Loans receivables forbearance period	3 months