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Fair Value Measurements - OREO Measured at Fair Value on a Nonrecurring Basis (Details) - Level 3 - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
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OREO measured at fair value on a nonrecurring basis |  |
Carrying amount prior to remeasurement | $ 9,174 | $ 8,290
Impairment recognized in results of operations | (1,232) | (1,549)
Fair value | $ 7,942 | $ 6,741

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