Income Taxes	6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate for the three and six months ended June 30, 2017 was 15.9% and 7.4%, respectively, compared to 14.8% and 16.1% for the three and six months ended June 30, 2016, respectively. The significant items impacting the 2017 and 2016 rates include a provision for federal alternative minimum tax, a net state and foreign tax provision, certain permanent items, and a change in the valuation allowance established for the net deferred tax asset balance projected for December 31, 2017 and 2016. We recognize valuation allowances on deferred tax assets if, based on the weight of the evidence, we determine it is more likely than not such assets will not be realized. Changes in valuation allowances are included in our tax provision in the period of change. In determining whether a valuation allowance is warranted, we evaluate factors such as prior years’ earnings history, expected future earnings, loss carry-back and carry-forward periods, reversals of existing deferred tax liabilities and tax planning strategies that potentially enhance the likelihood of the realization of a deferred tax asset. At June 30, 2017 and December 31, 2016, substantially all of our net deferred tax assets were subject to a valuation allowance.

Income Taxes

6 Months Ended

Jun. 30, 2017

Our effective tax rate for the three and six months ended June 30, 2017 was 15.9% and 7.4%, respectively, compared to 14.8% and 16.1% for the three and six months ended June 30, 2016, respectively. The significant items impacting the 2017 and 2016 rates include a provision for federal alternative minimum tax, a net state and foreign tax provision, certain permanent items, and a change in the valuation allowance established for the net deferred tax asset balance projected for December 31, 2017 and 2016. We recognize valuation allowances on deferred tax assets if, based on the weight of the evidence, we determine it is more likely than not such assets will not be realized. Changes in valuation allowances are included in our tax provision in the period of change. In determining whether a valuation allowance is warranted, we evaluate factors such as prior years’ earnings history, expected future earnings, loss carry-back and carry-forward periods, reversals of existing deferred tax liabilities and tax planning strategies that potentially enhance the likelihood of the realization of a deferred tax asset. At June 30, 2017 and December 31, 2016, substantially all of our net deferred tax assets were subject to a valuation allowance.