Income Taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items. The Company’s reported effective income tax rate was 30.0% and (333.9)% for the three months ended March 31, 2017 and 2016, respectively. The Company’s effective income tax rate differs from the U.S. federal statutory rate each year due to certain operations that are subject to tax incentives, state and local taxes, and foreign taxes that are different than the U.S. federal statutory rate. In addition, the effective tax rate can be impacted each period by discrete factors and events. The effective tax rates were affected by the fair value changes to contingent consideration in each period. Portions of the total amount recognized from fair value changes to contingent consideration relate to non-taxable acquisitions for which deferred taxes are not recognized, consistent with the treatment of goodwill and intangible assets for those acquisitions under U.S. GAAP. In the three months ended March 31, 2017, income of $1.0 million was recognized from fair value changes to contingent consideration. In the three months ended March 31, 2016 expense of $1.9 million was recognized. Additionally, the Company continues to incur losses in jurisdictions which have valuation allowances against tax loss carryforwards, so a tax benefit has not been recognized in the financial statements.

Income Taxes

3 Months Ended

Mar. 31, 2017

The Company's tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items. The Company’s reported effective income tax rate was 30.0% and (333.9)% for the three months ended March 31, 2017 and 2016, respectively. The Company’s effective income tax rate differs from the U.S. federal statutory rate each year due to certain operations that are subject to tax incentives, state and local taxes, and foreign taxes that are different than the U.S. federal statutory rate. In addition, the effective tax rate can be impacted each period by discrete factors and events.

The effective tax rates were affected by the fair value changes to contingent consideration in each period. Portions of the total amount recognized from fair value changes to contingent consideration relate to non-taxable acquisitions for which deferred taxes are not recognized, consistent with the treatment of goodwill and intangible assets for those acquisitions under U.S. GAAP. In the three months ended March 31, 2017, income of $1.0 million was recognized from fair value changes to contingent consideration. In the three months ended March 31, 2016 expense of $1.9 million was recognized. Additionally, the Company continues to incur losses in jurisdictions which have valuation allowances against tax loss carryforwards, so a tax benefit has not been recognized in the financial statements.