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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2014
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional Amount	$ 182,239
Interest rate caps agreements
Derivative [Line Items]
Premiums paid			$ 4,600
Interest rate swap agreements and non-hedging derivative assets and liabilities
Cap interest rate			3.00%
Effective interest rate			3.00%
Designated as Hedging Instrument | Cash flow hedges:
Interest rate swap agreements and non-hedging derivative assets and liabilities
Weighted Average Maturity	4 years 1 month 6 days
Notional Amount	$ 90,000	$ 90,000
Estimated Fair Value Asset (Liability)	$ 803	$ 669
Designated as Hedging Instrument | Cash flow hedges: | Interest rate caps agreements
Interest rate swap agreements and non-hedging derivative assets and liabilities
Weighted Average Maturity	4 years 1 month 6 days	5 years 1 month 6 days
Notional Amount	$ 90,000	$ 90,000
Estimated Fair Value Asset (Liability)	803	669
Realized gain (loss)	(519)	(257)
Designated as Hedging Instrument | Economic hedges:
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional Amount		20,352
Estimated Fair Value Asset (Liability)		$ (221)
Designated as Hedging Instrument | Economic hedges: | Forward sale commitments
Interest rate swap agreements and non-hedging derivative assets and liabilities
Weighted Average Maturity		2 months 12 days
Notional Amount		$ 20,352
Estimated Fair Value Asset (Liability)		(221)
Realized gain (loss)	221	(77)
Not Designated as Hedging Instrument
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional Amount	92,239	130,205
Estimated Fair Value Asset (Liability)	$ 8	$ 447
Not Designated as Hedging Instrument | Interest rate lock commitments
Interest rate swap agreements and non-hedging derivative assets and liabilities
Weighted Average Maturity	1 month 6 days	2 months 12 days
Notional Amount	$ 957	$ 19,853
Estimated Fair Value Asset (Liability)	8	(1)
Realized gain (loss)	$ 9	(22)
Not Designated as Hedging Instrument | Customer loan derivative liability
Interest rate swap agreements and non-hedging derivative assets and liabilities
Weighted Average Maturity	9 years 10 months 24 days
Notional Amount	$ 45,641	19,853
Estimated Fair Value Asset (Liability)	$ (1,353)	$ (1)
Not Designated as Hedging Instrument | Customer loan derivative asset
Interest rate swap agreements and non-hedging derivative assets and liabilities
Weighted Average Maturity	9 years 10 months 24 days
Notional Amount	$ 45,641
Estimated Fair Value Asset (Liability)	1,353
Liability | Not Designated as Hedging Instrument
Interest rate swap agreements and non-hedging derivative assets and liabilities
Estimated Fair Value Asset (Liability)	$ 811

X

- Definition

Derivative, Premium

+ References

No definition available.

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- Definition

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

+ References

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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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
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