FAIR VALUE OF FINANCIAL INSTRUMENTS, Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Recurring [Member]
Marketable Equity Securities (Registered Mutual Funds) [Abstract]
Domestic Equity Mutual Funds	$ 1,624	$ 1,420
International Equity Mutual Funds	419	377
Fixed Income Mutual Funds	3,910	3,870
Securities available-for-sale [Abstract]
Agency Notes	40,552	25,145
Corporate Securities	26,453	11,135
Pass-through MBS issued by GSEs	267,267	354,613
Agency CMOs	142,242	111,992
Loans held for sale	3,814	1,097
Derivative - cash flow hedges	1,258	4,669
Derivative - freestanding derivatives	440
Financial Liabilities [Abstract]
Derivative - cash flow hedges	8,047	2,097
Derivative - freestanding derivatives	440
Recurring [Member] | Level 1 Inputs [Member]
Marketable Equity Securities (Registered Mutual Funds) [Abstract]
Domestic Equity Mutual Funds	1,624	1,420
International Equity Mutual Funds	419	377
Fixed Income Mutual Funds	3,910	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	40,552	25,145
Corporate Securities	26,453	11,135
Pass-through MBS issued by GSEs	267,267	354,613
Agency CMOs	142,242	111,992
Loans held for sale	3,814	1,097
Derivative - cash flow hedges	1,258	4,669
Derivative - freestanding derivatives	440
Financial Liabilities [Abstract]
Derivative - cash flow hedges	8,047	2,097
Derivative - freestanding derivatives	440
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]
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract]
Impaired loans	$ 0	$ 0