DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Ineffectiveness included in net income			$ 0
Interest expense	$ 6,267,000	$ 4,567,000	12,567,000	$ 8,233,000
Unrealized loss to be reclassified as a reduction of interest expense			0
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Notional amount	$ 5,000,000		5,000,000		$ 5,000,000
Interest expense			$ 339,000	$ 343,000	$ 687,000