MSRs - Components of Servicing Income (Details) - Mortgages - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule Of Components Of Servicing Income [Line Items]
Servicing income	$ 196,404	$ 192,519	$ 416,382	$ 445,257
Total servicing income	$ 196,404	$ 192,519	$ 416,382	$ 445,257