FAIR VALUE OF FINANCIAL INSTRUMENTS, Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Securities available-for-sale [Abstract]
Loans held for sale	$ 1,839	$ 1,097
Recurring [Member]
Marketable equity securities (Registered Mutual Funds) [Abstract]
Domestic equity mutual funds	1,564	1,420
International equity mutual funds	395	377
Fixed income mutual funds	3,876	3,870
Securities available-for-sale [Abstract]
Agency Notes	40,047	25,145
Corporate Securities	26,543	11,135
Pass-through MBS issued by GSEs	247,431	354,613
Agency CMOs	205,587	111,992
Loans held for sale	1,839	1,097
Derivative - cash flow hedges	730	4,669
Derivative - freestanding derivatives	1,696
Financial Liabilities [Abstract]
Derivative - cash flow hedges	9,842	2,097
Derivative - freestanding derivatives	1,696
Recurring [Member] | Level 1 Inputs [Member]
Marketable equity securities (Registered Mutual Funds) [Abstract]
Domestic equity mutual funds	1,564	1,420
International equity mutual funds	395	377
Fixed income mutual funds	3,876	3,870
Securities available-for-sale [Abstract]
Agency Notes	0	0
Corporate Securities	0	0
Pass-through MBS issued by GSEs	0	0
Agency CMOs	0	0
Loans held for sale	0	0
Derivative - cash flow hedges	0	0
Derivative - freestanding derivatives	0
Financial Liabilities [Abstract]
Derivative - cash flow hedges	0	0
Derivative - freestanding derivatives	0
Recurring [Member] | Level 2 Inputs [Member]
Marketable equity securities (Registered Mutual Funds) [Abstract]
Domestic equity mutual funds	0	0
International equity mutual funds	0	0
Fixed income mutual funds	0	0
Securities available-for-sale [Abstract]
Agency Notes	40,047	25,145
Corporate Securities	26,543	11,135
Pass-through MBS issued by GSEs	247,431	354,613
Agency CMOs	205,587	111,992
Loans held for sale	1,839	1,097
Derivative - cash flow hedges	730	4,669
Derivative - freestanding derivatives	1,696
Financial Liabilities [Abstract]
Derivative - cash flow hedges	9,842	2,097
Derivative - freestanding derivatives	1,696
Recurring [Member] | Level 3 Inputs [Member]
Marketable equity securities (Registered Mutual Funds) [Abstract]
Domestic equity mutual funds	0	0
International equity mutual funds	0	0
Fixed income mutual funds	0	0
Securities available-for-sale [Abstract]
Agency Notes	0	0
Corporate Securities	0	0
Pass-through MBS issued by GSEs	0	0
Agency CMOs	0	0
Loans held for sale	0	0
Derivative - cash flow hedges	0	0
Derivative - freestanding derivatives	0
Financial Liabilities [Abstract]
Derivative - cash flow hedges	0	0
Derivative - freestanding derivatives	0
Nonrecurring [Member]
Impaired Loans [Abstract]
Fair Value		$ 0
Nonrecurring [Member] | C&I [Member]
Impaired Loans [Abstract]
Carrying Amount Before Allocation	15,000
Specific Valuation Allowance Allocation	7,500
Fair Value	7,500
Nonrecurring [Member] | Level 1 Inputs [Member] | C&I [Member]
Impaired Loans [Abstract]
Fair Value	0
Nonrecurring [Member] | Level 2 Inputs [Member] | C&I [Member]
Impaired Loans [Abstract]
Fair Value	0
Nonrecurring [Member] | Level 3 Inputs [Member] | C&I [Member]
Impaired Loans [Abstract]
Fair Value	$ 7,500