Income taxes	3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income taxes	Income taxes The effective tax rates for continuing operations of 3.4% and (1.1%), respectively, for the three months ended March 31, 2015 and March 31, 2014, were determined using an estimated annual effective tax rate and after considering any discrete items for such periods. Due to a valuation allowance against the Company's U.S. deferred tax assets, the effective tax rate for the three months ended March 31, 2015, does not include the expense of the current period U.S. taxable income. 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, 2015. As a result, income tax expense for the three months ended March 31, 2015, is primarily due to income tax expense in certain state jurisdictions. As a result of anticipated profitability for the year and positive trends in the foreseeable future, the Company may release all or a portion of this valuation allowance by the end of 2015. However, the exact timing and amount of the valuation allowance released are subject to change based on the level of profitability that the Company is able to actually achieve for the year and its visibility into future period results. The potential release of this valuation allowance during 2015 would have a material impact on the Company's recorded tax expense in the period of reversal. The Company will release this valuation allowance when management determines that it is more likely than not that its deferred tax asset will be realized.

Income taxes

3 Months Ended

Mar. 31, 2015

The effective tax rates for continuing operations of 3.4% and (1.1%), respectively, for the three months ended March 31, 2015 and March 31, 2014, were determined using an estimated annual effective tax rate and after considering any discrete items for such periods. Due to a valuation allowance against the Company's U.S. deferred tax assets, the effective tax rate for the three months ended March 31, 2015, does not include the expense of the current period U.S. taxable income. 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, 2015. As a result, income tax expense for the three months ended March 31, 2015, is primarily due to income tax expense in certain state jurisdictions.

As a result of anticipated profitability for the year and positive trends in the foreseeable future, the Company may release all or a portion of this valuation allowance by the end of 2015. However, the exact timing and amount of the valuation allowance released are subject to change based on the level of profitability that the Company is able to actually achieve for the year and its visibility into future period results. The potential release of this valuation allowance during 2015 would have a material impact on the Company's recorded tax expense in the period of reversal. The Company will release this valuation allowance when management determines that it is more likely than not that its deferred tax asset will be realized.