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Schedule of Condensed Cash Flow Revisions for Prior Periods (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended				3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended			6 Months Ended		3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended			6 Months Ended		3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Parent	Jun. 30, 2012 Parent	Mar. 31, 2013 Parent Condensed Cash Flow Revision	Mar. 31, 2012 Parent Condensed Cash Flow Revision	Jun. 30, 2012 Parent Condensed Cash Flow Revision	Sep. 30, 2012 Parent Condensed Cash Flow Revision	Dec. 31, 2012 Parent Condensed Cash Flow Revision	Dec. 31, 2011 Parent Condensed Cash Flow Revision	Dec. 31, 2010 Parent Condensed Cash Flow Revision	Jun. 30, 2013 Guarantors	Jun. 30, 2012 Guarantors	Mar. 31, 2013 Guarantors Condensed Cash Flow Revision	Mar. 31, 2012 Guarantors Condensed Cash Flow Revision	Jun. 30, 2012 Guarantors Condensed Cash Flow Revision	Sep. 30, 2012 Guarantors Condensed Cash Flow Revision	Dec. 31, 2012 Guarantors Condensed Cash Flow Revision	Dec. 31, 2011 Guarantors Condensed Cash Flow Revision	Dec. 31, 2010 Guarantors Condensed Cash Flow Revision	Jun. 30, 2013 Non-Guarantors	Jun. 30, 2012 Non-Guarantors	Mar. 31, 2013 Non-Guarantors Condensed Cash Flow Revision	Mar. 31, 2012 Non-Guarantors Condensed Cash Flow Revision	Jun. 30, 2012 Non-Guarantors Condensed Cash Flow Revision	Sep. 30, 2012 Non-Guarantors Condensed Cash Flow Revision	Dec. 31, 2012 Non-Guarantors Condensed Cash Flow Revision	Dec. 31, 2011 Non-Guarantors Condensed Cash Flow Revision	Dec. 31, 2010 Non-Guarantors Condensed Cash Flow Revision
Condensed Financial Statements, Captions
Net cash (used in) provided by operating activities	$ 384,683	$ 417,706	$ (162,836)	$ 413,460	$ (2,287,259)	$ 53,386	$ 268,806	$ 669,502	$ 945,448	$ 288,415	$ 286,291	$ 420,672	$ (127,344)	$ 2,297,970	$ (16,578)	$ (186,706)	$ (550,489)	$ (809,099)	$ (172,927)	$ (235,352)	$ 120,672	$ 71,648	$ (10,711)	$ (36,808)	$ (82,100)	$ (119,013)	$ (136,349)	$ (115,488)	$ (50,939)
Net cash (used in) provided by financing activities	$ (1,326,807)	$ 1,259,442	$ 948,031	$ 418,143	$ 2,287,259	$ (53,386)	$ (268,806)	$ (669,502)	$ (945,448)	$ (288,415)	$ (286,291)	$ (2,186,436)	$ 141,394	$ (2,297,970)	$ 16,578	$ 186,706	$ 550,489	$ 809,099	$ 172,927	$ 235,352	$ (121,881)	$ 547,158	$ 10,711	$ 36,808	$ 82,100	$ 119,013	$ 136,349	$ 115,488	$ 50,939

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The net cash inflow or outflow from financing activity for the period.

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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.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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

-Publisher FASB

-Name Accounting Standards Codification

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-Number 95

-Paragraph 28

-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

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-Number 95

-Paragraph 26

-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.



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-Name Accounting Standards Codification

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