Note 25: Summary of Unaudited Quarterly Operating Results: Schedule of Quarterly Financial Information (Details) - Quarterly operating results - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017
Interest Income, Operating	$ 58,726	$ 60,187	$ 58,723	$ 57,358	$ 56,142	$ 52,982	$ 49,943	$ 46,882	$ 46,536	$ 46,368	$ 44,744	$ 45,413
Interest Expense Operating	13,784	14,263	13,802	12,753	11,585	9,997	8,731	7,444	7,263	7,087	6,843	6,712
Provision for Other Losses	650	1,950	1,600	1,950	1,950	1,300	1,950	1,950	1,950	2,950	1,950	2,250
Debt Securities, Available-for-sale, Realized Gain (Loss)	(72)	0	0	10	0	2	0	0	0	0	0	0
Noninterest Income, Other Operating Income	7,695	8,655	7,157	7,450	7,220	14,604	7,459	6,935	7,374	7,655	15,800	7,698
Other Noninterest Expense	29,535	28,725	28,383	28,495	28,774	28,309	29,915	28,312	29,283	28,034	28,371	28,573
Provision for income taxes	4,559	4,172	3,720	3,998	3,765	5,464	2,967	2,645	3,207	4,289	7,204	4,058
Net Income Available to Common Shareholders	$ 17,893	$ 19,732	$ 18,375	$ 17,612	$ 17,288	$ 22,516	$ 13,839	$ 13,466	$ 12,207	$ 11,663	$ 16,176	$ 11,518
Earnings per share operating results diluted	$ 1.24	$ 1.38	$ 1.28	$ 1.23	$ 1.21	$ 1.57	$ 0.97	$ 0.95	$ 0.86	$ 0.82	$ 1.14	$ 0.81