INTEREST EXPENSE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 43,400	$ 47,200	$ 54,000
Interest on long-term debt and other financing arrangements	44,604	77,170	104,361
Amortization of capitalized debt issuance costs	4,502	6,018	9,072
Amortization of debt issuance discount	0	0	12,945
Total interest expense	49,106	83,188	126,378
Guarantee Fees Previously Paid in Kind [Member] [Member]
Cash paid for Guarantee Fees that may be paid in kind	27,300	0	22,400
Guarantee Fee [Member]
Interest on long-term debt and other financing arrangements	26,700	55,700	64,400
Cash paid for Guarantee Fees that may be paid in kind	$ 812	$ 8,300	$ 8,349