LONG-TERM DEBT LIABILITIES - Debt Extinguishment and Net Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Interest Expense
Interest expense	$ 8,644	$ 9,965	$ 26,076	$ 30,564
Amortization of deferred financing costs	1,031	1,005	3,165	3,058
Amortization of original issue discount of senior notes	77	69	226	203
Interest expense on interest rate hedging agreements	0	0
Interest income and other investment income	0	(1)	0	(3)
Total net interest expense	$ 9,752	$ 11,038	$ 29,467	$ 33,822