Fair Value Measurements - Measurement of OREO (Details) - Fair Value, Measurements, Nonrecurring - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
OREO not covered under loss-share agreements:
Carrying amount prior to remeasurement	$ 5,258	$ 8,732
Impairment recognized in results of operations	(939)	(1,340)
Fair value	$ 4,319	$ 7,392

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_OtherRealEstateNonCoveredRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration