Long-term Debt and Derivatives (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Long-term Debt
Debt	$ 2,044,914	$ 2,171,123
Less current maturities of long-term debt	(44,559)	(357,927)
Less discount on senior secured credit facility term loan B	(1,749)
Long-term debt, net of current maturities	1,998,606	1,813,196
Senior secured credit facility
Long-term Debt
Debt	1,715,750	1,589,125
$250 million 6 3/4% senior subordinated notes due March 2015
Long-term Debt
Debt		250,000
Debt instrument interest rate stated percentage	6.75%	6.75%
$325 million 8 3/4% senior subordinated notes due August 2019
Long-term Debt
Debt	325,000	325,000
Debt instrument interest rate stated percentage	8.75%	8.75%
Other long-term obligations
Long-term Debt
Debt	1,949	3,782
Capital leases
Long-term Debt
Debt	$ 2,215	$ 3,216

The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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

-Publisher FASB

-Name Accounting Standards Codification

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

+ Details