FAIR VALUE OF FINANCIAL INSTRUMENTS (Carrying Amount and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Securities available for sale	$ 27,490	$ 32,157
Securities held to maturity	4,529	5,330
Carrying Amount
Assets:
Cash and due from banks	6,165	6,790
Overnight deposits	148,260	254,441
Securities available for sale	27,490	32,157
Securities held to maturity	4,757	5,428
Loans, net	1,680,436	1,405,009
Other investments
FRB Stock	7,233	3,911
FHLB Stock	3,912	2,766
SBA Loan Fund	5,000	5,000
Certificates of deposit		2,000
Disability Opportunity Fund	500
Accrued interest receivable	5,239	4,421
Liabilities:
Deposits without stated maturities	1,438,516	1,324,110
Deposits with stated maturities	95,415	80,245
Borrowed Funds		42,198
Federal Home Loan Bank of New York advances	60,000
Trust preferred securities payable	20,620	20,620
Subordinated debt, net of issuance cost	24,531	24,489
Accrued interest payable	918	749
Total Fair Value
Assets:
Cash and due from banks	6,165	6,790
Overnight deposits	148,260	254,441
Securities available for sale	27,490	32,157
Securities held to maturity	4,529	5,330
Loans, net	1,630,967	1,410,860
Other investments
Certificates of deposit		2,000
Disability Opportunity Fund	500
Accrued interest receivable	5,239	4,421
Liabilities:
Deposits without stated maturities	1,438,516	1,324,110
Deposits with stated maturities	95,132	80,079
Borrowed Funds		42,188
Federal Home Loan Bank of New York advances	59,769
Trust preferred securities payable	20,618	19,997
Subordinated debt, net of issuance cost	25,250	25,500
Accrued interest payable	918	749
Fair Value, Inputs, Level 1
Assets:
Cash and due from banks	6,165	6,790
Overnight deposits	148,260	254,441
Securities available for sale	2,077	2,108
Securities held to maturity	0	0
Loans, net	0	0
Other investments
Certificates of deposit		2,000
Accrued interest receivable		11
Liabilities:
Deposits without stated maturities	1,438,516	1,324,110
Deposits with stated maturities	0	0
Borrowed Funds		0
Federal Home Loan Bank of New York advances	0
Trust preferred securities payable	0	0
Subordinated debt, net of issuance cost	0	0
Accrued interest payable	43	27
Fair Value, Inputs, Level 2
Assets:
Cash and due from banks	0	0
Overnight deposits	0	0
Securities available for sale	25,413	30,049
Securities held to maturity	4,529	5,330
Loans, net	0	0
Other investments
Certificates of deposit		0
Accrued interest receivable	124	116
Liabilities:
Deposits without stated maturities	0	0
Deposits with stated maturities	95,132	80,079
Borrowed Funds		42,188
Federal Home Loan Bank of New York advances	59,769
Trust preferred securities payable	0	0
Subordinated debt, net of issuance cost	25,250	25,500
Accrued interest payable	650	258
Fair Value, Inputs, Level 3
Assets:
Cash and due from banks	0	0
Overnight deposits	0	0
Securities available for sale	0	0
Securities held to maturity	0	0
Loans, net	1,630,967	1,410,860
Other investments
Certificates of deposit		0
Disability Opportunity Fund	500
Accrued interest receivable	5,115	4,294
Liabilities:
Deposits without stated maturities	0	0
Deposits with stated maturities	0	0
Borrowed Funds		0
Federal Home Loan Bank of New York advances	0
Trust preferred securities payable	20,618	19,997
Subordinated debt, net of issuance cost	0	0
Accrued interest payable	$ 225	$ 464