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NOTE 6: LOANS AND ALLOWANCE FOR LOAN LOSSES: Loans Modified in Troubled Debt Restructurings by Segment (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Troubled Debt Restructurings Total Modifications	$ 7,000	$ 15,000
Troubled Debt Restructurings Accruing Interest	4,800	12,300
Substandard
Troubled Debt Restructurings	2,300	8,800
Construction and Land Development
Troubled Debt Restructured Loans and Impaired	256	266
One- to Four-Family and Other Residential
Troubled Debt Restructured Loans and Impaired	4,100	6,200
Commercial Real Estate
Troubled Debt Restructured Loans and Impaired	1,300	7,100
Commercial Business
Troubled Debt Restructured Loans and Impaired	568	867
Consumer
Troubled Debt Restructured Loans and Impaired	$ 856	$ 617

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