Note 6: Loans and Allowance For Loan Losses: Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Provision for loan losses	$ 2,250	$ 2,101
One-to-Four-Family Residential Construction
Provision for Loan Losses Expensed	549	51
Financing Receivable, Allowance for Credit Losses, Write-downs	(35)	(84)
Allowance for Doubtful Accounts Receivable, Recoveries	21	16
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	568		$ 570
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2,231		1,628
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	58		124
Financing Receivable, Individually Evaluated for Impairment	6,529		6,015
Financing Receivable, Collectively Evaluated for Impairment	355,938		370,172
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	144,219		155,378
One-to-Four-Family Residential Construction | Beginning of Period
Provision for loan losses	2,322	4,900
One-to-Four-Family Residential Construction | End of Period
Provision for loan losses	2,857	4,883
Other Residential
Provision for Loan Losses Expensed	(1,751)	(582)
Allowance for Doubtful Accounts Receivable, Recoveries	55	13
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	2
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,738		5,396
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	50		90
Financing Receivable, Individually Evaluated for Impairment	3,797		3,812
Financing Receivable, Collectively Evaluated for Impairment	665,200		659,566
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	24,110		29,600
Other Residential | Beginning of Period
Provision for loan losses	5,486	3,190
Other Residential | End of Period
Provision for loan losses	3,790	2,621
Commercial Real Estate
Provision for Loan Losses Expensed	(476)	1,288
Financing Receivable, Allowance for Credit Losses, Write-downs	(1)	(2,309)
Allowance for Doubtful Accounts Receivable, Recoveries	26	11
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	523		2,209
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	14,711		13,507
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	253		222
Financing Receivable, Individually Evaluated for Impairment	8,676		10,507
Financing Receivable, Collectively Evaluated for Impairment	1,217,607		1,176,399
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	47,188		54,208
Commercial Real Estate | Beginning of Period
Provision for loan losses	15,938	14,738
Commercial Real Estate | End of Period
Provision for loan losses	15,487	13,728
Commercial Construction
Provision for Loan Losses Expensed	501	129
Financing Receivable, Allowance for Credit Losses, Write-downs	(295)	(30)
Allowance for Doubtful Accounts Receivable, Recoveries	7	8
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,292		1,291
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,142		953
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	63		40
Financing Receivable, Individually Evaluated for Impairment	4,379		6,023
Financing Receivable, Collectively Evaluated for Impairment	875,783		825,215
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	4,880		2,191
Commercial Construction | Beginning of Period
Provision for loan losses	2,284	3,019
Commercial Construction | End of Period
Provision for loan losses	2,497	3,126
Commercial Business
Provision for Loan Losses Expensed	1,885	(554)
Financing Receivable, Allowance for Credit Losses, Write-downs	(275)	(19)
Allowance for Doubtful Accounts Receivable, Recoveries	46	47
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3,342		1,295
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,274		1,681
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	55		39
Financing Receivable, Individually Evaluated for Impairment	6,993		4,539
Financing Receivable, Collectively Evaluated for Impairment	361,521		369,154
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	5,952		6,429
Commercial Business | Beginning of Period
Provision for loan losses	3,015	4,203
Commercial Business | End of Period
Provision for loan losses	4,671	3,677
Consumer
Provision for Loan Losses Expensed	1,542	1,769
Financing Receivable, Allowance for Credit Losses, Write-downs	(3,403)	(1,737)
Allowance for Doubtful Accounts Receivable, Recoveries	1,197	860
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	552		997
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	7,024		7,248
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	115		110
Financing Receivable, Individually Evaluated for Impairment	3,227		3,385
Financing Receivable, Collectively Evaluated for Impairment	633,019		669,602
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	32,682		35,353
Consumer | Beginning of Period
Provision for loan losses	8,355	8,099
Consumer | End of Period
Provision for loan losses	7,691	8,991
Loans Receivable
Provision for Loan Losses Expensed	2,250	2,101
Financing Receivable, Allowance for Credit Losses, Write-downs	(4,009)	(4,179)
Allowance for Doubtful Accounts Receivable, Recoveries	1,352	955
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	6,279		6,362
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	30,120		30,413
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	594		625
Financing Receivable, Individually Evaluated for Impairment	33,601		34,281
Financing Receivable, Collectively Evaluated for Impairment	4,109,068		4,070,108
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	259,031		$ 283,159
Loans Receivable | Beginning of Period
Provision for loan losses	37,400	38,149
Loans Receivable | End of Period
Provision for loan losses	$ 36,993	$ 37,026