Income taxes	3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]
Income taxes	Income taxes The effective tax rates for continuing operations of (1.1%) and (3.2%), respectively, for the three months ended March 31, 2014 and March 31, 2013 were determined using an estimated annual effective tax rate and after considering any discrete items for such periods. Due to a valuation allowance against our U.S. deferred tax assets, the effective tax rate for the three months ended March 31, 2014 does not include the benefit of the current period U.S. tax loss. A valuation allowance is recorded to reduce the deferred tax assets reported if, based on the weight of the evidence, it is more likely than not that a portion or none of the deferred tax assets will be realized. After consideration of all the evidence, including reversal of deferred tax liabilities, future taxable income and other factors, management has determined that a full valuation allowance is necessary as of March 31, 2014. As a result, income tax expense for the three months ended March 31, 2014 is primarily due to income tax expense in certain state jurisdictions.

Income taxes

3 Months Ended

Mar. 31, 2014

The effective tax rates for continuing operations of (1.1%) and (3.2%), respectively, for the three months ended March 31, 2014 and March 31, 2013 were determined using an estimated annual effective tax rate and after considering any discrete items for such periods. Due to a valuation allowance against our U.S. deferred tax assets, the effective tax rate for the three months ended March 31, 2014 does not include the benefit of the current period U.S. tax loss. A valuation allowance is recorded to reduce the deferred tax assets reported if, based on the weight of the evidence, it is more likely than not that a portion or none of the deferred tax assets will be realized. After consideration of all the evidence, including reversal of deferred tax liabilities, future taxable income and other factors, management has determined that a full valuation allowance is necessary as of March 31, 2014. As a result, income tax expense for the three months ended March 31, 2014 is primarily due to income tax expense in certain state jurisdictions.