NOTE 6: LOANS AND ALLOWANCE FOR LOAN LOSSES: Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Provision for Loan and Lease Losses	$ 1,950	$ 1,950	$ 3,900	$ 4,200
One-to-Four-Family Residential Construction
Provision for Loan Losses Expensed	63	(427)	487	122
Financing Receivable, Allowance for Credit Losses, Write-downs	(27)	(41)	(41)	(76)
Allowance for Doubtful Accounts Receivable, Recoveries	89	24	173	45
One-to-Four-Family Residential Construction | Beginning of Period
Provision for Loan and Lease Losses	2,602	2,857	2,108	2,322
One-to-Four-Family Residential Construction | End of Period
Provision for Loan and Lease Losses	2,727	2,413	2,727	2,413
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	737		737		$ 513
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,953		1,953		1,564
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	37				31
Financing Receivable, Individually Evaluated for Impairment	6,740		6,740		6,950
Financing Receivable, Collectively Evaluated for Impairment	381,570		381,570		341,888
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	103,903		103,903		120,295
Other Residential
Provision for Loan Losses Expensed	364	(147)	969	(1,898)
Financing Receivable, Allowance for Credit Losses, Write-downs	(75)	(2)	(331)	(2)
Allowance for Doubtful Accounts Receivable, Recoveries	344	14	368	69
Other Residential | Beginning of Period
Provision for Loan and Lease Losses	3,212	3,790	2,839	5,486
Other Residential | End of Period
Provision for Loan and Lease Losses	3,845	3,655	3,845	3,655
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,817		3,817		2,813
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	28				26
Financing Receivable, Individually Evaluated for Impairment	1,015		1,015		2,907
Financing Receivable, Collectively Evaluated for Impairment	784,187		784,187		742,738
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	13,193		13,193		14,877
Commercial Real Estate
Provision for Loan Losses Expensed	1,297	1,246	811	770
Financing Receivable, Allowance for Credit Losses, Write-downs	0	(1,291)	(102)	(1,292)
Allowance for Doubtful Accounts Receivable, Recoveries	115	0	126	26
Commercial Real Estate | Beginning of Period
Provision for Loan and Lease Losses	18,062	15,487	18,639	15,938
Commercial Real Estate | End of Period
Provision for Loan and Lease Losses	19,474	15,442	19,474	15,442
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	220		220		599
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	18,988		18,988		17,843
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	266				197
Financing Receivable, Individually Evaluated for Impairment	8,313		8,313		8,315
Financing Receivable, Collectively Evaluated for Impairment	1,299,653		1,299,653		1,227,014
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	36,857		36,857		39,210
Commercial Construction
Provision for Loan Losses Expensed	109	(724)	471	(223)
Financing Receivable, Allowance for Credit Losses, Write-downs	(46)	(92)	(83)	(387)
Allowance for Doubtful Accounts Receivable, Recoveries	144	30	240	37
Commercial Construction | Beginning of Period
Provision for Loan and Lease Losses	2,188	2,497	1,767	2,284
Commercial Construction | End of Period
Provision for Loan and Lease Losses	2,395	1,711	2,395	1,711
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2,322		2,322		1,690
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	73				77
Financing Receivable, Individually Evaluated for Impairment	15		15		15
Financing Receivable, Collectively Evaluated for Impairment	1,305,192		1,305,192		1,112,308
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	3,404		3,404		3,806
Commercial Business
Provision for Loan Losses Expensed	(454)	(661)	28	1,224
Financing Receivable, Allowance for Credit Losses, Write-downs	(472)	0	(881)	(275)
Allowance for Doubtful Accounts Receivable, Recoveries	222	355	263	401
Commercial Business | Beginning of Period
Provision for Loan and Lease Losses	3,695	4,671	3,581	3,015
Commercial Business | End of Period
Provision for Loan and Lease Losses	2,991	4,365	2,991	4,365
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,422		1,422		2,140
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,545		1,545		1,369
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	24				72
Financing Receivable, Individually Evaluated for Impairment	3,350		3,350		3,018
Financing Receivable, Collectively Evaluated for Impairment	363,983		363,983		372,192
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	4,444		4,444		5,275
Consumer
Provision for Loan Losses Expensed	571	2,663	1,134	4,205
Financing Receivable, Allowance for Credit Losses, Write-downs	(2,112)	(2,565)	(4,934)	(5,968)
Allowance for Doubtful Accounts Receivable, Recoveries	1,114	1,158	2,366	2,355
Consumer | Beginning of Period
Provision for Loan and Lease Losses	6,551	7,691	7,558	8,355
Consumer | End of Period
Provision for Loan and Lease Losses	6,124	8,947	6,124	8,947
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	641		641		699
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	5,443		5,443		6,802
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	40				57
Financing Receivable, Individually Evaluated for Impairment	3,330		3,330		4,129
Financing Receivable, Collectively Evaluated for Impairment	470,441		470,441		531,820
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	22,335		22,335		26,206
Loans Receivable
Provision for Loan Losses Expensed	1,950	1,950	3,900	4,200
Financing Receivable, Allowance for Credit Losses, Write-downs	(2,732)	(3,991)	(6,372)	(8,000)
Allowance for Doubtful Accounts Receivable, Recoveries	2,028	1,581	3,536	2,933
Loans Receivable | Beginning of Period
Provision for Loan and Lease Losses	36,310	36,993	36,492	37,400
Loans Receivable | End of Period
Provision for Loan and Lease Losses	37,556	$ 36,533	37,556	$ 36,533
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3,020		3,020		3,951
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	34,068		34,068		32,081
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	468				460
Financing Receivable, Individually Evaluated for Impairment	22,763		22,763		25,334
Financing Receivable, Collectively Evaluated for Impairment	4,605,026		4,605,026		4,327,960
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	$ 184,136		$ 184,136		$ 209,669