CONSOLIDATING FINANCIAL STATEMENTS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011
7-3/8% Senior Subordinated Notes due January 15, 2014 [Member]
Debt Instrument
Interest rate of debt securities (as a percent)	7.375%
Principal repayments of long-term debt	$ 297.6
4% Convertible Senior Subordinated Notes due June 1, 2015
Debt Instrument
Interest rate of debt securities (as a percent)	4.00%
8% Senior Subordinated Notes due November 15, 2017 [Member]
Debt Instrument
Interest rate of debt securities (as a percent)	8.00%
10-7/8% Senior Notes due June 1, 2016 [Member]
Debt Instrument
Interest rate of debt securities (as a percent)	10.875%

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 20

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration