Income Taxes	9 Months Ended
Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We are subject to income taxes in the U.S. and numerous foreign jurisdictions, and our effective tax rate is generally lower than the expected tax rate due to reductions of our deferred tax asset valuation allowance. In the nine months ended September 30, 2013, we also reversed $0.5 million of accruals made in prior years for uncertain tax positions. Significant judgment is required in evaluating our uncertain tax positions and determining our provision for income taxes. In addition, we are subject to the continuous examination of our income tax returns by the Internal Revenue Service in the U.S. and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. On March 17, 2006, the Company experienced an ownership change as defined under Section 382 of the Internal Revenue Code (“IRC”). This ownership change resulted in an annual IRC Section 382 limitation that limits the use of certain tax attribute carry-forwards and also resulted in the write-off of certain deferred tax assets and the related valuation allowances that the Company recorded in 2006. On August 4, 2008, the Company experienced an additional ownership change as defined under Section 382 of the IRC. This ownership change resulted in an additional annual IRC Section 382 limitation that also limits the use of certain tax attribute carry-forwards. The 2008 limitation did not decrease the amount of U.S. federal loss carry-forwards available to the Company, and the Company projects that this limitation will not cause the related tax attributes to expire unused. Therefore, the 2008 ownership change did not impact the Company’s financial position, results of operations or cash flows.

Income Taxes

9 Months Ended

Sep. 30, 2013

We are subject to income taxes in the U.S. and numerous foreign jurisdictions, and our effective tax rate is generally lower than the expected tax rate due to reductions of our deferred tax asset valuation allowance. In the nine months ended September 30, 2013, we also reversed $0.5 million of accruals made in prior years for uncertain tax positions. Significant judgment is required in evaluating our uncertain tax positions and determining our provision for income taxes. In addition, we are subject to the continuous examination of our income tax returns by the Internal Revenue Service in the U.S. and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes.

On March 17, 2006, the Company experienced an ownership change as defined under Section 382 of the Internal Revenue Code (“IRC”). This ownership change resulted in an annual IRC Section 382 limitation that limits the use of certain tax attribute carry-forwards and also resulted in the write-off of certain deferred tax assets and the related valuation allowances that the Company recorded in 2006. On August 4, 2008, the Company experienced an additional ownership change as defined under Section 382 of the IRC. This ownership change resulted in an additional annual IRC Section 382 limitation that also limits the use of certain tax attribute carry-forwards. The 2008 limitation did not decrease the amount of U.S. federal loss carry-forwards available to the Company, and the Company projects that this limitation will not cause the related tax attributes to expire unused. Therefore, the 2008 ownership change did not impact the Company’s financial position, results of operations or cash flows.