DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details) $ in Thousands	Sep. 30, 2018 USD ($) instrument
Derivative [Line Items]
Notional	$ 199,330
Total derivatives	(3,804)
Designated as Hedging Instrument
Derivative [Line Items]
Notional	75,000
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	124,330
Total derivatives	885
Other Liabilities \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative Liability	$ (4,689)
Interest rate products \| Other Liabilities \| Designated as Hedging Instrument
Derivative [Line Items]
Count \| instrument	3
Notional	$ 75,000
Derivative Liability	(4,689)
Interest rate lock commitments with customers \| Other Assets \| Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	47,634
Derivative Asset	595
Interest rate lock commitments with customers \| Other Liabilities \| Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	16,064
Derivative Liability	(61)
Forward sale commitments \| Other Assets \| Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	44,840
Derivative Asset	382
Forward sale commitments \| Other Liabilities \| Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	15,792
Derivative Liability	$ (31)

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-SubTopic 10
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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 5
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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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The number of derivative instruments of a particular group held by the entity.

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