8) Fair Value of Financial Instruments: Schedule of Changes in the consolidated balance sheet line items measured using level 3 inputs (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Net Derivatives Loan Commitments
Fair Value Balance	$ 2,524,343		$ 1,591,816	$ 1,996,589
Fair Value, Gains (Losses) included in earnings	932,527	$ (404,773)
Loans Held For Sale
Fair Value Balance	123,374,303		$ 136,210,853	$ 133,414,188
Originations	428,500,921	2,194,607,543
Sales	(456,552,964)	(2,259,145,473)
Fair Value, Gains (Losses) included in earnings	$ 15,215,493	78,162,392
Transfer to mortgage loans held for investment		$ (10,827,797)