FAIR VALUE - Carrying Amounts and Estimated Fair values of Other Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financial Assets [Abstract]
Cash and due from financial institutions	$ 26,471	$ 24,886
Interest-bearing deposits in other financial institutions	29,388	1,299
Securities available for sale	324,484	344,820
Securities held to maturity	4,863	4,822
Loans, net	1,172,366	1,154,373
Accrued interest receivable	2,928	2,870
Financial liabilities [Abstract]
Securities sold under agreements to repurchase	28,825	28,453
FHLBNY overnight advances	0	13,900
FHLBNY term advances	19,175	19,203
Recurring [Member]
Financial Assets [Abstract]
Securities available for sale	324,484	344,820
Securities held to maturity	4,863
Derivative assets	87	15
Financial liabilities [Abstract]
Derivative liabilities	171	63
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets [Abstract]
Cash and due from financial institutions	26,471	24,886
Interest-bearing deposits in other financial institutions	29,388	1,299
Trading assets	734	701
Securities available for sale	54	14,840
Securities held to maturity	0	0
FHLBNY and FRBNY stock	0	0
Loans, net	0	0
Loans held for sale	0	0
Accrued interest receivable	0	39
Derivative assets	0	0
Financial liabilities [Abstract]
Demand, savings, and insured money market accounts	1,270,711	1,234,216
Time deposits	0	0
Securities sold under agreements to repurchase	0	0
FHLBNY overnight advances		0
FHLBNY term advances	0	0
Accrued interest payable	17	17
Derivative liabilities	0	0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial Assets [Abstract]
Cash and due from financial institutions	0	0
Interest-bearing deposits in other financial institutions	0	0
Trading assets	0	0
Securities available for sale	324,178	329,732
Securities held to maturity	0	0
FHLBNY and FRBNY stock	0	0
Loans, net	0	0
Loans held for sale	593	1,076
Accrued interest receivable	1,488	1,141
Derivative assets	87	15
Financial liabilities [Abstract]
Demand, savings, and insured money market accounts	0	0
Time deposits	164,001	166,551
Securities sold under agreements to repurchase	29,533	29,128
FHLBNY overnight advances		13,901
FHLBNY term advances	19,637	19,658
Accrued interest payable	190	192
Derivative liabilities	87	15
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial Assets [Abstract]
Cash and due from financial institutions	0	0
Interest-bearing deposits in other financial institutions	0	0
Trading assets	0	0
Securities available for sale	252	248
Securities held to maturity		4,822
FHLBNY and FRBNY stock	0	0
Loans, net	1,196,894	1,178,081
Loans held for sale	0	0
Accrued interest receivable	2,898	2,835
Derivative assets	0	0
Financial liabilities [Abstract]
Demand, savings, and insured money market accounts	0	0
Time deposits	0	0
Securities sold under agreements to repurchase	0	0
FHLBNY overnight advances		0
FHLBNY term advances	0	0
Accrued interest payable	0	0
Derivative liabilities	84	48
Recurring [Member] | Carrying Amount [Member]
Financial Assets [Abstract]
Cash and due from financial institutions	26,471	24,886
Interest-bearing deposits in other financial institutions	29,388	1,299
Trading assets	734	701
Securities available for sale	324,484	344,820
Securities held to maturity	4,577	4,566
FHLBNY and FRBNY stock	4,179	4,797
Loans, net	1,172,366	1,154,373
Loans held for sale	593	1,076
Accrued interest receivable	4,386	4,015
Derivative assets	87	15
Financial liabilities [Abstract]
Demand, savings, and insured money market accounts	1,270,711	1,234,216
Time deposits	163,541	166,079
Securities sold under agreements to repurchase	28,825	28,453
FHLBNY overnight advances		13,900
FHLBNY term advances	19,175	19,203
Accrued interest payable	207	209
Derivative liabilities	171	63
Recurring [Member] | Estimated Fair Value [Member]
Financial Assets [Abstract]
Cash and due from financial institutions	26,471	24,886
Interest-bearing deposits in other financial institutions	29,388	1,299
Trading assets	734	701
Securities available for sale	324,484	344,820
Securities held to maturity	4,863	4,822
Loans, net	1,196,894	1,178,081
Loans held for sale	593	1,076
Accrued interest receivable	4,386	4,015
Derivative assets	87	15
Financial liabilities [Abstract]
Demand, savings, and insured money market accounts	1,270,711	1,234,216
Time deposits	164,001	166,551
Securities sold under agreements to repurchase	29,533	29,128
FHLBNY overnight advances		13,901
FHLBNY term advances	19,637	19,658
Accrued interest payable	207	209
Derivative liabilities	$ 171	$ 63