Income Taxes	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	10. Income Taxes The effective tax rates for the three months ended September 30, 2017 and 2016 were 24.6% and 28.2%, respectively. The decrease in the effective tax rate for the three months ended September 30, 2017 relative to the prior comparable period is principally due to a discrete tax benefit in 2017. The discrete items for the three months ended September 30, 2017 primarily resulted from the settlement of a foreign audit partially offset by adjustments to the provision based on filed tax returns. The discrete items for the three months ended September 30, 2016 principally resulted from the adjustment of the tax accounts to the U.S. tax return as filed. The effective tax rates for the nine months ended September 30, 2017 and 2016 were 26.4% and 26.5%, respectively. The comparable effective tax rate for the nine months ended September 30, 2017 relative to the prior comparable period is primarily due to the benefit from the revaluation of deferred tax balances as a result of a tax rate reduction in a non U.S. jurisdiction in 2016 as compared to the foreign audit settlement in 2017. For the nine months ended September 30, 2017, stock-based compensation excess tax benefits of $5,609 were reflected in the Condensed Consolidated Statement of Earnings as a component of the provision for income taxes as a result of adopting Accounting Standards Update ("ASU") 2016-09, Compensation Stock Compensation (Topic 718). See Note 18 — Recent Accounting Pronouncements regarding the adoption of the standard. Dover and its subsidiaries file tax returns in the U.S., including various state and local returns and in other foreign jurisdictions. We believe adequate provision has been made for all income tax uncertainties. The Company is routinely audited by taxing authorities in its filing jurisdictions, and a number of these audits are currently underway. The Company believes that within the next twelve months uncertain tax positions may be resolved and statutes of limitations will expire, which could result in a decrease in the gross amount of unrecognized tax benefits of approximately zero to $32,127.

Income Taxes

9 Months Ended

Sep. 30, 2017

10. Income Taxes

The effective tax rates for the three months ended September 30, 2017 and 2016 were 24.6% and 28.2%, respectively. The decrease in the effective tax rate for the three months ended September 30, 2017 relative to the prior comparable period is principally due to a discrete tax benefit in 2017.

The discrete items for the three months ended September 30, 2017 primarily resulted from the settlement of a foreign audit partially offset by adjustments to the provision based on filed tax returns. The discrete items for the three months ended September 30, 2016 principally resulted from the adjustment of the tax accounts to the U.S. tax return as filed.

The effective tax rates for the nine months ended September 30, 2017 and 2016 were 26.4% and 26.5%, respectively. The comparable effective tax rate for the nine months ended September 30, 2017 relative to the prior comparable period is primarily due to the benefit from the revaluation of deferred tax balances as a result of a tax rate reduction in a non U.S. jurisdiction in 2016 as compared to the foreign audit settlement in 2017.

For the nine months ended September 30, 2017, stock-based compensation excess tax benefits of $5,609 were reflected in the Condensed Consolidated Statement of Earnings as a component of the provision for income taxes as a result of adopting Accounting Standards Update ("ASU") 2016-09, Compensation Stock Compensation (Topic 718). See Note 18 — Recent Accounting Pronouncements regarding the adoption of the standard.

Dover and its subsidiaries file tax returns in the U.S., including various state and local returns and in other foreign jurisdictions. We believe adequate provision has been made for all income tax uncertainties. The Company is routinely audited by taxing authorities in its filing jurisdictions, and a number of these audits are currently underway. The Company believes that within the next twelve months uncertain tax positions may be resolved and statutes of limitations will expire, which could result in a decrease in the gross amount of unrecognized tax benefits of approximately zero to $32,127.