Income Taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate for the three months ended March 31, 2017 was 13.9%, compared to 13.0% for the three months ended March 31, 2016. The significant items impacting the 2017 rate 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. The significant items impacting the 2016 rate 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 that had been projected for December 31, 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 March 31, 2017 and December 31, 2016, substantially all of our net deferred tax assets were subject to a valuation allowance.

Income Taxes

3 Months Ended

Mar. 31, 2017

Our effective tax rate for the three months ended March 31, 2017 was 13.9%, compared to 13.0% for the three months ended March 31, 2016. The significant items impacting the 2017 rate 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. The significant items impacting the 2016 rate 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 that had been projected for December 31, 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 March 31, 2017 and December 31, 2016, substantially all of our net deferred tax assets were subject to a valuation allowance.