4) Loans Held For Sale: Aggregate fair value - Loans Held for Sale (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Text Block [Abstract]
Aggregate Fair Value - Loans Held For Sale	$ 445,878,979	$ 213,457,632
Aggregate unpaid principal balance - Loans Held for Sale	428,860,105	206,417,122
Unrealized gain - Loans Held for Sale	$ 17,018,874	$ 7,040,510