Condensed Consolidating Information (Details 3) (USD $) In Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Financial Statements, Captions
Net cash provided by (used in) operating activities	$ 165,997	$ 19,351	$ 169,934	$ 92,093
Net cash used in investing activities	(32,834)	(39,983)	(52,670)	(70,163)
Net cash provided by financing activities	(16,282)	(13,281)	(26,086)	160,655
Increase (decrease) in cash and equivalents	116,881	(33,913)	91,178	182,585
Cash and equivalents at beginning of period	160,810	225,506	186,513	9,008
Cash and equivalents at end of period	277,691	191,593	277,691	191,593
Parent
Condensed Financial Statements, Captions
Net cash provided by (used in) operating activities			158,937	168,393
Net cash used in investing activities			(14,734)	(103,052)
Net cash provided by financing activities			(53,645)	115,060
Increase (decrease) in cash and equivalents			90,558	180,401
Cash and equivalents at beginning of period			173,563	430
Cash and equivalents at end of period	264,121	180,831	264,121	180,831
Guarantors
Condensed Financial Statements, Captions
Net cash provided by (used in) operating activities			34,056	(17,285)
Net cash used in investing activities			(25,017)	(16,823)
Net cash provided by financing activities			(10,497)	33,134
Increase (decrease) in cash and equivalents			(1,458)	(974)
Cash and equivalents at beginning of period			10,628	6,363
Cash and equivalents at end of period	9,170	5,389	9,170	5,389
Combined Non-Guarantors
Condensed Financial Statements, Captions
Net cash provided by (used in) operating activities			(14,392)	(58,376)
Net cash used in investing activities			(12,919)	(31,884)
Net cash provided by financing activities			29,389	93,418
Increase (decrease) in cash and equivalents			2,078	3,158
Cash and equivalents at beginning of period			2,322	2,215
Cash and equivalents at end of period	4,400	5,373	4,400	5,373
Consolidating Adjustments
Condensed Financial Statements, Captions
Net cash provided by (used in) operating activities			(8,667)	(639)
Net cash used in investing activities				81,596
Net cash provided by financing activities			$ 8,667	$ (80,957)

Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 1
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7
-Footnote 1
-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
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3044-108585

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 8, 9
-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 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7, 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.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

+ Details

- Definition

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.

+ References+ Details