DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - AOCI (Details)		3 Months Ended		9 Months Ended
	Aug. 03, 2017 USD ($) swap	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance				$ 966,589,000	$ 1,297,347,000
Ending balance		$ 711,899,000	$ 978,189,000	711,899,000	978,189,000
Amount of derivatives reclassified out of AOCI				1,064,000
Number of swaps terminated | swap	3
Notional amount of terminated swaps	$ 65,000,000
Payment of derivative fees and accrued interest		38,000		38,000
Reclassification of interest rate swaps from AOCI to interest expense		8,000		8,000
Unsecured Term Loan Facility Entered Into May 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Repayments of debt	$ 65,000,000
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		603,000	(12,889,000)	(509,000)	(2,519,000)
Other comprehensive income (loss) before reclassifications		40,000	2,221,000	(149,000)	(10,347,000)
Amounts reclassified from accumulated other comprehensive income (loss)		293,000	1,051,000	1,594,000	3,249,000
Net current period other comprehensive income (loss)		333,000	3,272,000	1,445,000	(7,098,000)
Ending balance		$ 936,000	$ (9,617,000)	$ 936,000	$ (9,617,000)