Income Taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes The Company’s effective income tax rate fluctuates from the U.S. statutory tax rate based on, among other factors, changes in pretax income in jurisdictions with varying statutory tax rates, the impact of U.S. state and local taxes, and other differences related to the recognition of income and expense between U.S. GAAP and tax accounting. The Company’s effective income tax rate for the three months ended June 30, 2019 was 17.0%, compared with 43.9% for the three months ended June 30, 2018. The higher effective income tax rate for the three months ended June 30, 2018 was primarily attributable to changes in forecasted annual pretax income from the first quarter of 2018 to the second quarter of 2018. The Company also recorded tax expense related to the vesting of share-based compensation during the second quarter of 2019. The Company’s effective income tax rate for the six months ended June 30, 2019 was 17.7%, compared with 15.2% for the six months ended June 30, 2018. The change in the effective income tax rate for the six months ended June 30, 2019 was primarily attributable to the impact of various non-deductible expenses for U.S. tax purposes when measured against annual forecasted pretax book income in the computation of the effective tax rate, as well as the impact of non-U.S. valuation allowances booked in 2018. The Company continues to monitor income tax developments in the United States and other countries affecting the Company. In December 2017, the United States enacted U.S. Tax Reform, which materially impacted the consolidated financial statements by decreasing the U.S. corporate statutory tax rate and significantly affecting future periods. The Company expects several proposed U.S. Treasury regulations under U.S. Tax Reform that were issued during 2018 to be finalized during 2019, as well as additional regulations to be proposed and finalized during 2019. The Company will incorporate into its future financial statements the impacts, if any, of these regulations and additional authoritative guidance when finalized.

Income Taxes

6 Months Ended

Jun. 30, 2019

13. Income Taxes

The Company’s effective income tax rate fluctuates from the U.S. statutory tax rate based on, among other factors, changes in pretax income in jurisdictions with varying statutory tax rates, the impact of U.S. state and local taxes, and other differences related to the recognition of income and expense between U.S. GAAP and tax accounting.

The Company’s effective income tax rate for the three months ended June 30, 2019 was 17.0%, compared with 43.9% for the three months ended June 30, 2018. The higher effective income tax rate for the three months ended June 30, 2018 was primarily attributable to changes in forecasted annual pretax income from the first quarter of 2018 to the second quarter of 2018. The Company also recorded tax expense related to the vesting of share-based compensation during the second quarter of 2019.

The Company’s effective income tax rate for the six months ended June 30, 2019 was 17.7%, compared with 15.2% for the six months ended June 30, 2018. The change in the effective income tax rate for the six months ended June 30, 2019 was primarily attributable to the impact of various non-deductible expenses for U.S. tax purposes when measured against annual forecasted pretax book income in the computation of the effective tax rate, as well as the impact of non-U.S. valuation allowances booked in 2018.

The Company continues to monitor income tax developments in the United States and other countries affecting the Company. In December 2017, the United States enacted U.S. Tax Reform, which materially impacted the consolidated financial statements by decreasing the U.S. corporate statutory tax rate and significantly affecting future periods. The Company expects several proposed U.S. Treasury regulations under U.S. Tax Reform that were issued during 2018 to be finalized during 2019, as well as additional regulations to be proposed and finalized during 2019. The Company will incorporate into its future financial statements the impacts, if any, of these regulations and additional authoritative guidance when finalized.