DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Interest Rate Swaps) (Details) - Cash Flow Hedging - Designated as Hedging Instrument	9 Months Ended
	Sep. 30, 2018 USD ($)
Interest Rate Swap 1
Derivative [Line Items]
Term	9 years
Notional Amount	$ 170,000
Fixed Rate of Swap	2.20%
Bank Margin on Debt	1.63%
Total Effective Interest Rate	3.83%
Interest Rate Swap 2
Derivative [Line Items]
Term	9 years
Notional Amount	$ 180,000
Fixed Rate of Swap	2.35%
Bank Margin on Debt	1.63%
Total Effective Interest Rate	3.98%
Interest Rate Swap 3
Derivative [Line Items]
Term	10 years
Notional Amount	$ 100,000
Fixed Rate of Swap	1.60%
Bank Margin on Debt	1.90%
Total Effective Interest Rate	3.50%
Interest Rate Swap 4
Derivative [Line Items]
Term	10 years
Notional Amount	$ 100,000
Fixed Rate of Swap	1.60%
Bank Margin on Debt	1.90%
Total Effective Interest Rate	3.50%
Interest Rate Swap 5
Derivative [Line Items]
Term	10 years
Notional Amount	$ 100,000
Fixed Rate of Swap	1.26%
Bank Margin on Debt	1.90%
Total Effective Interest Rate	3.16%