Note 4: Loans and Allowance for Loan Losses: Schedule of Balance in the Allowance for Loan Losses and Recorded Invesetment (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Loans Receivable
Financing Receivable, Credit Loss, Expense (Reversal)		$ 388	$ 314	$ 1,284	$ 995
Allowance for Loan and Lease Losses, Write-offs		(310)	(84)	(416)	(196)
Accounts Receivable, Allowance for Credit Loss, Recovery		26	3	43	10
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 0	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	19,903	20,814	19,023	20,814	19,023
Financing Receivables Allowance for Credit Losses Acquired with Deteriorated Credit Quality	0			0	0
Financing Receivable, Individually Evaluated for Impairment	0	0		0
Financing Receivable, Collectively Evaluated for Impairment	1,837,763	1,919,491		1,919,491
Financing Receivables Acquired with Deteriorated Credit Quality	28,548			24,111
Loans Receivable | Beginning of Period
Allowance for Loan Losses	19,903	20,710	18,790	19,903	18,214
Loans Receivable | End of Period
Allowance for Loan Losses		20,814	19,023	20,814	19,023
Consumer Loan
Financing Receivable, Credit Loss, Expense (Reversal)		(4)	(11)	92	80
Allowance for Loan and Lease Losses, Write-offs		(26)	(3)	(97)	(20)
Accounts Receivable, Allowance for Credit Loss, Recovery		6	0	9	5
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,046	1,050	967	1,050	967
Financing Receivables Allowance for Credit Losses Acquired with Deteriorated Credit Quality	0			0	0
Financing Receivable, Individually Evaluated for Impairment	0	0		0
Financing Receivable, Collectively Evaluated for Impairment	97,534	101,621		101,621
Financing Receivables Acquired with Deteriorated Credit Quality	0			0
Consumer Loan | Beginning of Period
Allowance for Loan Losses	1,046	1,074	981	1,046	902
Consumer Loan | End of Period
Allowance for Loan Losses		1,050	967	1,050	967
Commercial Loan
Financing Receivable, Credit Loss, Expense (Reversal)		(57)	(150)	327	87
Allowance for Loan and Lease Losses, Write-offs		(112)	(47)	(147)	(47)
Accounts Receivable, Allowance for Credit Loss, Recovery		1	0	1	1
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,387	4,568	4,237	4,568	4,237
Financing Receivables Allowance for Credit Losses Acquired with Deteriorated Credit Quality	0			0	0
Financing Receivable, Individually Evaluated for Impairment	0	0		0
Financing Receivable, Collectively Evaluated for Impairment	349,681	349,186		349,186
Financing Receivables Acquired with Deteriorated Credit Quality	6,193			6,089
Commercial Loan | Beginning of Period
Allowance for Loan Losses	4,387	4,736	4,434	4,387	4,196
Commercial Loan | End of Period
Allowance for Loan Losses		4,568	4,237	4,568	4,237
Construction Loan Payable
Financing Receivable, Credit Loss, Expense (Reversal)		118	(102)	292	94
Allowance for Loan and Lease Losses, Write-offs		0	0	0	0
Accounts Receivable, Allowance for Credit Loss, Recovery		0	0	0	0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,365	1,657	1,191	1,657	1,191
Financing Receivables Allowance for Credit Losses Acquired with Deteriorated Credit Quality	0			0	0
Financing Receivable, Individually Evaluated for Impairment	0	0		0
Financing Receivable, Collectively Evaluated for Impairment	78,826	95,518		95,518
Financing Receivables Acquired with Deteriorated Credit Quality	1,308			1,296
Construction Loan Payable | Beginning of Period
Allowance for Loan Losses	1,365	1,539	1,293	1,365	1,097
Construction Loan Payable | End of Period
Allowance for Loan Losses		1,657	1,191	1,657	1,191
Residential Real Estate
Financing Receivable, Credit Loss, Expense (Reversal)		294	293	160	415
Allowance for Loan and Lease Losses, Write-offs		(172)	(9)	(172)	(9)
Accounts Receivable, Allowance for Credit Loss, Recovery		18	0	18	1
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,706	3,712	3,633	3,712	3,633
Financing Receivables Allowance for Credit Losses Acquired with Deteriorated Credit Quality	0			0	0
Financing Receivable, Individually Evaluated for Impairment	0	0		0
Financing Receivable, Collectively Evaluated for Impairment	490,307	538,121		538,121
Financing Receivables Acquired with Deteriorated Credit Quality	1,685			1,295
Residential Real Estate | Beginning of Period
Allowance for Loan Losses	3,706	3,572	3,349	3,706	3,226
Residential Real Estate | End of Period
Allowance for Loan Losses		3,712	3,633	3,712	3,633
Commercial Real Estate
Financing Receivable, Credit Loss, Expense (Reversal)		37	284	413	319
Allowance for Loan and Lease Losses, Write-offs		0	(25)	0	(120)
Accounts Receivable, Allowance for Credit Loss, Recovery		1	3	15	3
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	9,399	9,827	8,995	9,827	8,995
Financing Receivables Allowance for Credit Losses Acquired with Deteriorated Credit Quality	0			0	0
Financing Receivable, Individually Evaluated for Impairment	0	0		0
Financing Receivable, Collectively Evaluated for Impairment	821,415	835,045		835,045
Financing Receivables Acquired with Deteriorated Credit Quality	19,362			15,431
Commercial Real Estate | Beginning of Period
Allowance for Loan Losses	$ 9,399	9,789	8,733	9,399	8,793
Commercial Real Estate | End of Period
Allowance for Loan Losses		$ 9,827	$ 8,995	$ 9,827	$ 8,995