LONG-TERM DEBT LIABILITIES - Debt Extinguishment and Net Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Interest Expense
Interest expense	$ 5,414	$ 8,623
Amortization of deferred financing costs	586	687
Amortization of original issue discount of senior notes	0	91
Interest income and other investment income	(23)	(9)
Total net interest expense	$ 5,977	$ 9,392