Income Taxes	9 Months Ended
Sep. 30, 2011
Income Taxes [Abstract]
Income Taxes	(11) Income Taxes At September 30, 2011, we had a gross liability for unrecognized tax benefits of $11.8 million. We have recognized tax benefits associated with these liabilities of $10.5 million at September 30, 2011. These balances are unchanged since December 31, 2010. We do not expect that the total amount of the unrecognized tax benefits will significantly increase or decrease within twelve months of the reporting date. We recognize interest related to unrecognized tax benefits in interest expense and penalties in operating expenses. Our liability for accrued interest and penalties related to uncertain tax positions was $1.0 million at September 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.

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