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Fair Value Measurements (Details 4) - Fair Value, Measurements, Nonrecurring - Significant Unobservable Inputs (Level 3) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
OREO not covered under loss-share agreements:    
Carrying amount prior to remeasurement $ 8,732 $ 8,290
Impairment recognized in results of operations (1,340) (1,549)
Fair value $ 7,392 $ 6,741