LOANS - Impaired Loans (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan	Dec. 31, 2018 USD ($) loan property
Impaired loans
Loans modified as TDRs			$ 4,100
Recorded Investment
With no related allowance recorded	$ 12,202		12,202		$ 16,634
With an allowance recorded	5,506		5,506		2,721
Total impaired loans	17,708		17,708		19,355
Unpaid Principal Balance
With no related allowance recorded	12,235		12,235		16,644
With an allowance recorded	5,506		5,506		2,721
Total impaired loans	17,741		17,741		19,365
Related Allocated Allowance
With an allowance recorded	715		715		189
Total impaired loans	715		715		189
Average Recorded Investment
With no related allowance recorded	11,903	$ 15,227	11,127	$ 15,038
With an allowance recorded	4,663	0	4,303	0
Average recorded investment in impaired loans	16,566	15,227	15,430	15,038
Interest Income Recognized
With no related allowance recorded	145	104	272	198
With an allowance recorded	42	0	77	0
Total impaired loans	187	104	349	$ 198
Other real estate	0		$ 0		$ 175
Other real estate owned, number of properties \| property					1
Number of loans modified as TDRs for which there was a payment default within twelve months following the modification \| loan			2	0
Commercial Real Estate \| Mortgage loans \| Owner occupied
Recorded Investment
With no related allowance recorded	589		$ 589		$ 268
With an allowance recorded	0		0		0
Total impaired loans	589		589		268
Unpaid Principal Balance
With no related allowance recorded	605		605		278
With an allowance recorded	0		0		0
Total impaired loans	605		605		278
Related Allocated Allowance
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Average Recorded Investment
With no related allowance recorded	576	184	524	$ 92
With an allowance recorded	0	0	0	0
Average recorded investment in impaired loans	576	184	524	92
Interest Income Recognized
With no related allowance recorded	0	0	0	0
With an allowance recorded	0	0	0	0
Total impaired loans	0	0	0	0
Commercial Real Estate \| Mortgage loans \| Non-owner occupied
Recorded Investment
With no related allowance recorded	3,241		3,241		2,816
With an allowance recorded	0		0		0
Total impaired loans	3,241		3,241		2,816
Unpaid Principal Balance
With no related allowance recorded	3,258		3,258		2,816
With an allowance recorded	0		0		0
Total impaired loans	3,258		3,258		2,816
Related Allocated Allowance
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Average Recorded Investment
With no related allowance recorded	2,904	1,163	2,842	1,168
With an allowance recorded	0	0	0	0
Average recorded investment in impaired loans	2,904	1,163	2,842	1,168
Interest Income Recognized
With no related allowance recorded	25	7	50	8
With an allowance recorded	0	0	0	0
Total impaired loans	25	7	50	8
Residential real estate mortgage loans \| Mortgage loans \| Residential mortgage
Recorded Investment
With no related allowance recorded	0		0		0
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Unpaid Principal Balance
With no related allowance recorded	0		0		0
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Related Allocated Allowance
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Average Recorded Investment
With no related allowance recorded	0	0	0	0
With an allowance recorded	0	0	0	0
Average recorded investment in impaired loans	0	0	0	0
Interest Income Recognized
With no related allowance recorded	0	0	0	0
With an allowance recorded	0	0	0	0
Total impaired loans	0	0	0	0
Residential real estate mortgage loans \| Mortgage loans \| Home equity
Recorded Investment
With no related allowance recorded	0		0		0
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Unpaid Principal Balance
With no related allowance recorded	0		0		0
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Related Allocated Allowance
With an allowance recorded	0		0		0
Total impaired loans	0		0		0
Average Recorded Investment
With no related allowance recorded	0	0	0	0
With an allowance recorded	0	0	0	0
Average recorded investment in impaired loans	0	0	0	0
Interest Income Recognized
With no related allowance recorded	0	0	0	0
With an allowance recorded	0	0	0	0
Total impaired loans	0	0	0	0
Commercial, industrial and agricultural loans
Impaired loans
Loans modified as TDRs			4,100	6,800
Commercial, industrial and agricultural loans \| Secured
Recorded Investment
With no related allowance recorded	1,644		1,644		8,234
With an allowance recorded	5,162		5,162		2,721
Total impaired loans	6,806		6,806		10,955
Unpaid Principal Balance
With no related allowance recorded	1,644		1,644		8,234
With an allowance recorded	5,162		5,162		2,721
Total impaired loans	6,806		6,806		10,955
Related Allocated Allowance
With an allowance recorded	371		371		189
Total impaired loans	371		371		189
Average Recorded Investment
With no related allowance recorded	1,644	8,702	1,562	8,723
With an allowance recorded	4,548	0	4,246	0
Average recorded investment in impaired loans	6,192	8,702	5,808	8,723
Interest Income Recognized
With no related allowance recorded	19	58	36	114
With an allowance recorded	42	0	77	0
Total impaired loans	61	58	113	114
Commercial, industrial and agricultural loans \| Unsecured
Recorded Investment
With no related allowance recorded	6,728		6,728		5,316
With an allowance recorded	344		344		0
Total impaired loans	7,072		7,072		5,316
Unpaid Principal Balance
With no related allowance recorded	6,728		6,728		5,316
With an allowance recorded	344		344		0
Total impaired loans	7,072		7,072		5,316
Related Allocated Allowance
With an allowance recorded	344		344
Total impaired loans	344		344
Average Recorded Investment
With no related allowance recorded	6,779	5,178	6,199	5,055
With an allowance recorded	115	0	57	0
Average recorded investment in impaired loans	6,894	5,178	6,256	5,055
Interest Income Recognized
With no related allowance recorded	101	39	186	76
With an allowance recorded	0	0	0	0
Total impaired loans	101	$ 39	186	$ 76
Taxi medallion loans
Impaired loans
Loans modified as TDRs					$ 2,700
Interest Income Recognized
Number of loans modified as TDRs for which there was a payment default within twelve months following the modification \| loan					3
Non-recurring basis
Recorded Investment
With an allowance recorded	5,500		5,500		$ 2,700
Related Allocated Allowance
With an allowance recorded	700		700		200
Non-recurring basis \| Carrying Amount
Interest Income Recognized
Other real estate					175
Non-recurring basis \| Carrying Amount \| Other real estate owned
Interest Income Recognized
Other real estate	$ 0		$ 0		$ 200

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