LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Senior Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Carrying Amount	$ 940,537	$ 1,213,423
Fair Value	987,224	1,271,189
2013 Convertible Notes [Member]
Debt Instrument [Line Items]
Carrying Amount	0	20,442
Fair Value	0	20,552
2015 Convertible Notes [Member]
Debt Instrument [Line Items]
Carrying Amount	238,723	231,812
Fair Value	250,593	238,052
2016 Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Carrying Amount	371,527	637,408
Fair Value	389,109	666,385
2017 Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Carrying Amount	330,287	323,761
Fair Value	$ 347,522	$ 346,200