Financial Information Related to Guarantor Subsidiaries (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Financial Information Related to Subsidiaries
Net income (loss)	$ 53,920	$ 15,503
Change in cumulative translation adjustment	5,905	7,855
Comprehensive income (loss)	59,825	23,358
Parent [Member]
Financial Information Related to Subsidiaries
Net income (loss)	53,920	15,503
Change in cumulative translation adjustment	5,905	7,855
Comprehensive income (loss)	59,825	23,358
Wholly owned subsidiary of Parent company	100.00%
Issuer [Member]
Financial Information Related to Subsidiaries
Net income (loss)	87,637	23,427
Change in cumulative translation adjustment	5,905	7,855
Comprehensive income (loss)	93,542	31,282
Guarantor Subsidiaries [Member]
Financial Information Related to Subsidiaries
Net income (loss)	190,181	61,078
Change in cumulative translation adjustment	(165)
Comprehensive income (loss)	190,016	61,078
Non-Guarantor Subsidiaries [Member]
Financial Information Related to Subsidiaries
Net income (loss)	2,781	(10,738)
Change in cumulative translation adjustment	5,905	7,855
Comprehensive income (loss)	8,686	(2,883)
Eliminations [Member]
Financial Information Related to Subsidiaries
Net income (loss)	(280,599)	(73,767)
Change in cumulative translation adjustment	(11,645)	(15,710)
Comprehensive income (loss)	$ (292,244)	$ (89,477)

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 45

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-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e540-108580

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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 30

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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

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-Appendix A

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

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6508144

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

+ Details

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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

-Publisher FASB

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

Reference 10: http://www.xbrl.org/2003/role/presentationRef

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Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-URI http://asc.fasb.org/extlink&oid=6518256

Reference 13: http://www.xbrl.org/2003/role/presentationRef

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Reference 14: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

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Reference 16: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 20

-Article 9

+ Details

- Definition

Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.

+ References

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

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+ Details