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NOTE 5: INVESTMENT SECURITIES: Unrealized Gain (Loss) on Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Collateralized Mortgage Backed Securities    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 69,870 $ 102,296
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (689) (1,501)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 20,706 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (424) 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 90,576 102,296
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (1,113) (1,501)
US States and Political Subdivisions Debt Securities    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 2,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 (8)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 0 2,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 0 (8)
Unrealized Losses and Estimated Fair Value    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 69,870 104,460
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (689) (1,509)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 20,706 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (424) 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 90,576 104,460
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss $ (1,113) $ (1,509)