11) Retirement Plans: 401(k) Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan, Description	The Company has three 401(k) savings plans covering all eligible employees, as defined above, which includes employer participation in accordance with the provisions of Section 401(k) of the Internal Revenue Code. The plans allow participants to make pretax contributions up to a maximum of $19,000 and $18,500 for the years 2019 and 2018, respectively or the statutory limits.
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount	$ 19,000	$ 18,500
Benefit plans funded with treasury stock	695,560	1,480,913
Safe Harbor Plan
Benefit plans funded with treasury stock	$ 695,560	$ 1,480,913