LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Long-term Debt, Current and Noncurrent [Abstract]
Senior debt	$ 1,166,143	$ 1,213,423
Total credit facilities and capital leases	7,006	7,368
Total long-term debt and other financing arrangements	1,173,149	1,220,791
Less current maturities	(1,597)	(21,918)
Total non-current long-term debt and other financing arrangements	1,171,552	1,198,873
Long-term Debt, Fiscal Year Maturity [Abstract]
2013	632
2014	403
2015	261,289
2016	612,847
2017	307,322
2018 and thereafter	3,040
Total senior debt and credit facilities	1,185,533
Net discount	(16,084)
Carrying amount of senior debt and credit facilities	$ 1,169,449