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LOANS - Recorded Investment and Number of Modifications (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) modification	Jun. 30, 2018 USD ($) modification	Jun. 30, 2019 USD ($) modification	Jun. 30, 2018 USD ($) modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	5	14	16	25
Pre-Modification Outstanding Recorded Investment	$ 350	$ 2,836	$ 1,024	$ 4,594
Post-Modification Outstanding Recorded Investment	$ 305	$ 2,554	$ 977	$ 3,597
Interest rate and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification			0	1
Post-Modification Outstanding Recorded Investment			$ 0	$ 17
Interest only payments and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	1	0	2	0
Post-Modification Outstanding Recorded Investment	$ 70	$ 0	$ 75	$ 0
Amortization and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification			4	0
Post-Modification Outstanding Recorded Investment			$ 275	$ 0
Forbearance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	0	2	1	2
Post-Modification Outstanding Recorded Investment	$ 0	$ 158	$ 77	$ 158
Forbearance and interest only payments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	2	0	4	3
Post-Modification Outstanding Recorded Investment	$ 131	$ 0	$ 243	$ 51
Forbearance and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	1	7	4	12
Post-Modification Outstanding Recorded Investment	$ 46	$ 779	$ 249	$ 1,331
Maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification			0	1
Post-Modification Outstanding Recorded Investment			$ 0	$ 423
Restructure with maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	0	4	0	4
Post-Modification Outstanding Recorded Investment	$ 0	$ 1,334	$ 0	$ 1,334
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	1	1	1	2
Post-Modification Outstanding Recorded Investment	$ 58	$ 283	$ 58	$ 283
Total commercial real estate | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	2	5	5	7
Pre-Modification Outstanding Recorded Investment	$ 186	$ 1,641	$ 299	$ 1,674
Post-Modification Outstanding Recorded Investment	$ 177	$ 1,390	$ 290	$ 1,409
Commercial and industrial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	1		3	2
Pre-Modification Outstanding Recorded Investment	$ 12		$ 43	$ 452
Post-Modification Outstanding Recorded Investment	$ 12		$ 43	$ 437
Commercial and industrial | Agricultural
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 mortgages | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification	2	7	8	12
Pre-Modification Outstanding Recorded Investment	$ 152	$ 1,091	$ 682	$ 2,196
Post-Modification Outstanding Recorded Investment	$ 116	$ 1,060	$ 644	$ 1,646
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification		1		1
Pre-Modification Outstanding Recorded Investment		$ 100		$ 100
Post-Modification Outstanding Recorded Investment		$ 100		$ 100
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications (in modification) | modification		1		2
Pre-Modification Outstanding Recorded Investment		$ 4		$ 5
Post-Modification Outstanding Recorded Investment		$ 4		$ 5

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 310
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