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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
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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