NOTE 6: LOANS AND ALLOWANCE FOR LOAN LOSSES: Financing Receivable, Allowance for Credit Loss (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Provision for Loan and Lease Losses	$ (4,500)	$ (1,950)	$ (14,371)	$ (5,500)
Loans Receivable
Financing Receivable, Credit Loss, Expense (Reversal)	4,500	1,950	14,371	5,500
Financing Receivable, Allowance for Credit Loss, Writeoff	(686)	(1,677)	(2,589)	(6,425)
Accounts Receivable, Allowance for Credit Loss, Recovery	623	879	2,162	2,922
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	746		746		$ 929
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	52,751		52,751		38,704
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	741		741		661
Financing Receivable, Individually Evaluated for Impairment	8,765		8,765		10,267
Financing Receivable, Collectively Evaluated for Impairment	5,145,722		5,145,722		4,914,573
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	106,128		106,128		127,206
Individually evaluated for impairment	746		746		929
Collectively evaluated for impairment	52,751		52,751		38,704
Individually evaluated for impairment	8,765		8,765		10,267
Collectively evaluated for impairment	5,145,722		5,145,722		4,914,573
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	106,128		106,128		127,206
Loans Receivable | Beginning of Period
Provision for Loan and Lease Losses	49,801	39,254	40,294	38,409
Loans Receivable | End of Period
Provision for Loan and Lease Losses	54,238	40,406	54,238	40,406
Commercial Real Estate
Financing Receivable, Credit Loss, Expense (Reversal)	3,686	2,246	8,217	4,791
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	(7)
Accounts Receivable, Allowance for Credit Loss, Recovery	2	13	42	39
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	466		466		517
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	31,756		31,756		23,570
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	371		371		247
Financing Receivable, Individually Evaluated for Impairment	3,056		3,056		4,020
Financing Receivable, Collectively Evaluated for Impairment	1,533,387		1,533,387		1,490,152
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	26,493		26,493		29,158
Individually evaluated for impairment	466		466		517
Collectively evaluated for impairment	31,756		31,756		23,570
Individually evaluated for impairment	3,056		3,056		4,020
Collectively evaluated for impairment	1,533,387		1,533,387		1,490,152
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	26,493		26,493		29,158
Commercial Real Estate | Beginning of Period
Provision for Loan and Lease Losses	28,905	22,367	24,334	19,803
Commercial Real Estate | End of Period
Provision for Loan and Lease Losses	32,593	24,626	32,593	24,626
Commercial Loan
Financing Receivable, Credit Loss, Expense (Reversal)	1,222	(571)	918	3
Financing Receivable, Allowance for Credit Loss, Writeoff	0	(46)	(1)	(266)
Accounts Receivable, Allowance for Credit Loss, Recovery	12	20	34	40
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,865		3,865		2,940
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	162		162		136
Financing Receivable, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Collectively Evaluated for Impairment	1,246,566		1,246,566		1,363,292
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	2,818		2,818		3,606
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	3,865		3,865		2,940
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	1,246,566		1,246,566		1,363,292
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	2,818		2,818		3,606
Commercial Loan | Beginning of Period
Provision for Loan and Lease Losses	2,793	3,479	3,076	3,105
Commercial Loan | End of Period
Provision for Loan and Lease Losses	4,027	2,882	4,027	2,882
One- to four-family residential construction
Financing Receivable, Credit Loss, Expense (Reversal)	(127)	(232)	17	931
Financing Receivable, Allowance for Credit Loss, Writeoff	0	(1)	(40)	(518)
Accounts Receivable, Allowance for Credit Loss, Recovery	67	61	116	96
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	79		79		198
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,288		4,288		3,973
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	65		65		168
Financing Receivable, Individually Evaluated for Impairment	3,603		3,603		2,960
Financing Receivable, Collectively Evaluated for Impairment	641,178		641,178		554,450
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	61,226		61,226		74,562
Individually evaluated for impairment	79		79		198
Collectively evaluated for impairment	4,288		4,288		3,973
Individually evaluated for impairment	3,603		3,603		2,960
Collectively evaluated for impairment	641,178		641,178		554,450
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	61,226		61,226		74,562
One- to four-family residential construction | Beginning of Period
Provision for Loan and Lease Losses	4,492	3,803	4,339	3,122
One- to four-family residential construction | End of Period
Provision for Loan and Lease Losses	4,432	3,631	4,432	3,631
Other residential
Financing Receivable, Credit Loss, Expense (Reversal)	(344)	566	3,401	(394)
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	0
Accounts Receivable, Allowance for Credit Loss, Recovery	11	0	177	0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8,642		8,642		5,101
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	89		89		52
Financing Receivable, Individually Evaluated for Impairment	0		0		0
Financing Receivable, Collectively Evaluated for Impairment	1,018,359		1,018,359		866,006
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	6,167		6,167		5,334
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	8,642		8,642		5,101
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	1,018,359		1,018,359		866,006
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	6,167		6,167		5,334
Other residential | Beginning of Period
Provision for Loan and Lease Losses	9,064	3,753	5,153	4,713
Other residential | End of Period
Provision for Loan and Lease Losses	8,731	4,319	8,731	4,319
Commercial Borrower
Financing Receivable, Credit Loss, Expense (Reversal)	55	(341)	424	(431)
Financing Receivable, Allowance for Credit Loss, Writeoff	(1)	(211)	(10)	(310)
Accounts Receivable, Allowance for Credit Loss, Recovery	35	100	137	399
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	15		15		13
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,849		1,849		1,306
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	42		42		36
Financing Receivable, Individually Evaluated for Impairment	197		197		1,286
Financing Receivable, Collectively Evaluated for Impairment	453,167		453,167		325,112
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	2,390		2,390		3,356
Individually evaluated for impairment	15		15		13
Collectively evaluated for impairment	1,849		1,849		1,306
Individually evaluated for impairment	197		197		1,286
Collectively evaluated for impairment	453,167		453,167		325,112
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	2,390		2,390		3,356
Commercial Borrower | Beginning of Period
Provision for Loan and Lease Losses	1,817	1,678	1,355	1,568
Commercial Borrower | End of Period
Provision for Loan and Lease Losses	1,906	1,226	1,906	1,226
Consumer Borrower
Financing Receivable, Credit Loss, Expense (Reversal)	8	282	1,394	600
Financing Receivable, Allowance for Credit Loss, Writeoff	(685)	(1,419)	(2,538)	(5,324)
Accounts Receivable, Allowance for Credit Loss, Recovery	496	685	1,656	2,348
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	186		186		201
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2,351		2,351		1,814
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	12		12		22
Financing Receivable, Individually Evaluated for Impairment	1,909		1,909		2,001
Financing Receivable, Collectively Evaluated for Impairment	253,065		253,065		315,561
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	7,034		7,034		11,190
Individually evaluated for impairment	186		186		201
Collectively evaluated for impairment	2,351		2,351		1,814
Individually evaluated for impairment	1,909		1,909		2,001
Collectively evaluated for impairment	253,065		253,065		315,561
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model	7,034		7,034		$ 11,190
Consumer Borrower | Beginning of Period
Provision for Loan and Lease Losses	2,730	4,174	2,037	6,098
Consumer Borrower | End of Period
Provision for Loan and Lease Losses	$ 2,549	$ 3,722	$ 2,549	$ 3,722