LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Senior Debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Carrying Amount	$ 958,754	$ 956,956
Fair Value	1,007,039	955,807
2015 Convertible Notes [Member]
Debt Instrument [Line Items]
Carrying Amount	243,676	241,193
Fair Value	254,404	237,011
2016 Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Carrying Amount	378,882	379,182
Fair Value	398,956	374,573
Fixed Rate 2017 Notes [Member]
Debt Instrument [Line Items]
Carrying Amount	336,196	336,581
Fair Value	$ 353,679	$ 344,223

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Name:	us-gaap_SeniorNotes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant