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LOANS - Recorded Investment and Number of Modifications (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) modification	Mar. 31, 2017 USD ($) modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	10	4
Pre-Modification Outstanding Recorded Investment	$ 1,727	$ 693
Post-Modification Outstanding Recorded Investment	$ 1,550	$ 691
Commercial and industrial | Commercial installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	2	1
Pre-Modification Outstanding Recorded Investment	$ 452	$ 80
Post-Modification Outstanding Recorded Investment	$ 448	$ 80
Commercial and industrial | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	1
Pre-Modification Outstanding Recorded Investment	$ 2
Post-Modification Outstanding Recorded Investment	$ 2
Total Commercial Real Estate | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	1
Pre-Modification Outstanding Recorded Investment	$ 167
Post-Modification Outstanding Recorded Investment	$ 0
Residential Real Estate | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	5	2
Pre-Modification Outstanding Recorded Investment	$ 1,105	$ 575
Post-Modification Outstanding Recorded Investment	$ 1,099	$ 574
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	1	1
Pre-Modification Outstanding Recorded Investment	$ 1	$ 38
Post-Modification Outstanding Recorded Investment	$ 1	$ 37

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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