Income Taxes	6 Months Ended
Jun. 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 six months ended June 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. We currently are in the process of determining if we experienced an ownership change subsequent to March 17, 2006, but have not yet completed this analysis. Based on preliminary calculations we have made with the assistance of external advisors, we believe that any additional limitations on the usage of our loss carry-forwards that would be imposed if an additional ownership change has occurred would be minimal. We do not believe that an additional ownership change would have a material adverse impact on our financial position, results of operations or cash flows.

Income Taxes

6 Months Ended

Jun. 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 six months ended June 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. We currently are in the process of determining if we experienced an ownership change subsequent to March 17, 2006, but have not yet completed this analysis. Based on preliminary calculations we have made with the assistance of external advisors, we believe that any additional limitations on the usage of our loss carry-forwards that would be imposed if an additional ownership change has occurred would be minimal. We do not believe that an additional ownership change would have a material adverse impact on our financial position, results of operations or cash flows.