INTEREST EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest on long-term debt and other financing arrangements	$ 9,374	$ 16,012	$ 22,829	$ 33,641
Amortization of capitalized debt issuance costs	(1,067)	(1,416)	(2,624)	(2,780)
Total interest expense	$ 10,441	$ 17,428	25,453	36,421
Interest Paid, Excluding Capitalized Interest, Operating Activities			$ 21,500	$ 19,600