ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) -Reclassifications Line Items (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassification adjustments
Interest expense	$ 2,809,000	$ 4,130,000
Unrealized Gain (Loss) on Interest Rate Hedge | Interest rate swap agreement
Reclassification adjustments
Amounts in AOCI expected to be recognized over the next 12 months before tax	1,100,000
Amounts in AOCI expected to be recognized over the next 12 months, net of taxes	862,000
Unrealized Gain (Loss) on Interest Rate Hedge | Interest rate swap agreement | Reclassification out of accumulated other comprehensive income
Reclassification adjustments
Interest expense	273,000	740,000
Interest expense, net of tax	$ 213,000	$ 481,000