FAIR VALUE OF FINANCIAL INSTRUMENTS - Estimated Fair Values Of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financial assets:
Securities available for sale, at fair value	$ 192,050	$ 182,139
Securities held to maturity	4,117	4,152
Interest rate swaps	1,240	2,114
Financial liabilities:
Interest rate swaps	1,639	779
Carrying Amount
Financial assets:
Cash and cash equivalents	23,003	26,678
Time deposits with other banks	200	200
Securities available for sale, at fair value	192,050	182,139
Securities held to maturity	4,031	4,078
Federal Home Loan Bank stock	9,347	11,764
Loans receivable, net of allowance	1,504,455	1,466,000
Accrued interest receivable	6,589	6,546
Interest rate swaps	1,240	2,114
Financial liabilities:
Non-maturity deposits	983,158	965,065
Time deposits	478,166	388,874
Short-term borrowings	114,800	175,295
Long-term borrowings	36,708	44,611
Subordinated debentures	27,862	27,859
Accrued interest payable	1,621	1,480
Interest rate swaps	1,639	779
Fair Value
Financial assets:
Cash and cash equivalents	23,003	26,678
Time deposits with other banks	200	200
Securities available for sale, at fair value	192,050	182,139
Securities held to maturity	4,117	4,152
Federal Home Loan Bank stock	9,347	11,764
Loans receivable, net of allowance	1,472,796	1,428,094
Accrued interest receivable	6,589	6,546
Interest rate swaps	1,240	2,114
Financial liabilities:
Non-maturity deposits	983,158	965,065
Time deposits	474,349	383,264
Short-term borrowings	114,919	175,366
Long-term borrowings	36,672	44,365
Subordinated debentures	26,840	26,840
Accrued interest payable	1,621	1,480
Interest rate swaps	1,639	779
Quoted Prices in Active Markets for Identical Assets (Level I)
Financial assets:
Cash and cash equivalents	23,003	26,678
Time deposits with other banks	0	0
Securities available for sale, at fair value	0	0
Securities held to maturity	0	0
Federal Home Loan Bank stock	0	0
Loans receivable, net of allowance	0	0
Accrued interest receivable	0	0
Interest rate swaps	0	0
Financial liabilities:
Non-maturity deposits	0	0
Time deposits	0	0
Short-term borrowings	114,919	175,366
Long-term borrowings	0	0
Subordinated debentures	0	0
Accrued interest payable	0	0
Interest rate swaps		0
Significant Other Observable Inputs (Level II)
Financial assets:
Cash and cash equivalents	0	0
Time deposits with other banks	200	200
Securities available for sale, at fair value	192,050	182,139
Securities held to maturity	4,117	4,152
Federal Home Loan Bank stock	9,347	11,764
Loans receivable, net of allowance	0	0
Accrued interest receivable	6,589	6,546
Interest rate swaps	1,240	2,114
Financial liabilities:
Non-maturity deposits	983,158	965,065
Time deposits	474,349	383,264
Short-term borrowings	0	0
Long-term borrowings	36,672	44,365
Subordinated debentures	26,840	26,840
Accrued interest payable	1,621	1,480
Interest rate swaps	1,639	779
Significant Unobservable Inputs (Level III)
Financial assets:
Cash and cash equivalents	0	0
Time deposits with other banks	0	0
Securities available for sale, at fair value	0	0
Securities held to maturity	0	0
Federal Home Loan Bank stock	0	0
Loans receivable, net of allowance	1,472,796	1,428,094
Accrued interest receivable	0	0
Interest rate swaps	0	0
Financial liabilities:
Non-maturity deposits	0	0
Time deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Subordinated debentures	0	0
Accrued interest payable	$ 0	0
Interest rate swaps		$ 0