Income Tax	6 Months Ended
Income Tax	Jun. 30, 2011
Income Tax [Abstract]
Income Tax	(8) Income Tax The provision for income taxes was $1.0 million for the three months ended June 30, 2011. The benefit for income taxes was $13.2 million for the three months ended June 30, 2010. The effective tax rate was 93.7% and 37.3% during the three months ended June 30, 2011 and 2010, respectively. The Company’s effective tax rate normally differs from the U.S. federal statutory rate of 35% primarily due to certain non-deductible permanent items, state income taxes and certain state minimum and gross receipts taxes, which are incurred regardless of whether the Company earns income. The Company’s high effective tax rate during the three months ended June 30, 2011 is primarily due to the impact of state gross receipts taxes totaling $0.2 million in the second quarter of 2011 when combined with low pre-tax net income. The benefit for income taxes was $29.1 million and $36.3 million for the six months ended June 30, 2011 and 2010, respectively, and resulted from a pre-tax net loss for both periods. The effective tax rate was 36.6% and 37.7% for the six months ended June 30, 2011 and 2010, respectively. The Company’s effective tax rate normally differs from the U.S. federal statutory rate of 35% primarily due to certain non-deductible permanent items, state income taxes and certain state minimum and gross receipts taxes, which are incurred regardless of whether the Company earns income. The Company’s effective tax rate decreased due to the effect of enacted state tax rate changes applied to the Company’s deferred balances during the six months ended June 30, 2011.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-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 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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