10) Derivative Instruments: Schedule of Derivative Assets at Fair Value (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Loan Commitments
Derivative, Notional Amount	$ 817,802,853	$ 659,245,038
Derivative Asset, Notional Amount	10,671,623	12,592,672
Derivative Liability, Notional Amount	228,547	2,464,062
Call Options
Derivative, Notional Amount	2,042,500	1,873,200
Derivative Asset, Notional Amount	0	0
Derivative Liability, Notional Amount	79,567	43,097
Net Derivatives Loan Commitments
Derivative, Notional Amount	819,845,353	661,118,238
Derivative Asset, Notional Amount	10,671,623	12,592,672
Derivative Liability, Notional Amount	$ 308,114	$ 2,507,159