8) Fair Value of Financial Instruments: Schedule of Changes in the consolidated balance sheet line items measured using level 3 inputs (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Net Derivatives Loan Commitments
Fair Value Balance	$ 3,507,039		$ 1,591,816	$ 1,996,589
Originations	0	$ 0
Sales	0	0
Fair Value, Gains (Losses) included in earnings	1,915,223	(404,773)
Transfer to mortgage loans held for investment		0
Loans Held For Sale
Fair Value Balance	233,713,098		$ 136,210,853	$ 133,414,188
Originations	1,840,552,029	2,194,607,543
Sales	(1,805,713,146)	(2,259,145,473)
Fair Value, Gains (Losses) included in earnings	$ 62,663,362	78,162,392
Transfer to mortgage loans held for investment		$ (10,827,797)