MSRs - Components of Servicing Income (Details) - Mortgages - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Components Of Servicing Income [Line Items]
Servicing income, net	$ 106,392	$ 187,989	$ 326,314	$ 585,516
Total servicing income	$ 106,392	$ 187,989	$ 326,314	$ 585,516