Income Taxes	9 Months Ended
Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes: The effective income tax rate for the three-month and nine-month periods ended September 30, 2019 was 15.5% and 19.2%, respectively, compared to 21.5% and 20.1% for the three-month and nine-month periods ended September 30, 2018, respectively. The Company’s effective income tax rate fluctuates based on, among other factors, its level and location of income. The difference between the U.S. federal statutory income tax rate and our effective income tax rate for the three-month and nine-month periods ended September 30, 2019 and 2018 was impacted by a variety of factors, primarily stemming from the location in which income was earned. For the three-month and nine-month periods ended September 30, 2019, this was mainly attributable to our share of the income of our Jordan Bromine Company Limited (“JBC”) joint venture, a Free Zones company under the laws of the Hashemite Kingdom of Jordan. Income tax expense for the three-month period ended September 30, 2018 included discrete tax expenses of $1.9 million from stock-based compensation arrangements and $1.7 million related to the accounting for the U.S. Tax Cuts and Jobs Act (“TCJA”), partially offset by discrete tax benefits of $2.0 million from foreign accrual to return adjustments and $1.2 million from the release of foreign valuation allowances. Income tax expense for the nine-month period ended September 30, 2018 included discrete tax expenses of $42.0 million for the disposition of the polyolefin catalysts and components portion of our Performance Catalyst Solutions (“PCS”) business (“Polyolefin Catalysts Divestiture”) and $7.3 million for adjustments to foreign valuation allowances, partially offset by discrete tax benefits of $8.0 million for tax accounting method changes, $4.8 million for adjustments related to accounting for the TCJA, $5.4 million from stock-based compensation arrangements and $2.0 million from foreign accrual to return adjustments.

The effective income tax rate for the three-month and nine-month periods ended September 30, 2019 was 15.5% and 19.2%, respectively, compared to 21.5% and 20.1% for the three-month and nine-month periods ended September 30, 2018, respectively. The Company’s effective income tax rate fluctuates based on, among other factors, its level and location of income. The difference between the U.S. federal statutory income tax rate and our effective income tax rate for the three-month and nine-month periods ended September 30, 2019 and 2018 was impacted by a variety of factors, primarily stemming from the location in which income was earned. For the three-month and nine-month periods ended September 30, 2019, this was mainly attributable to our share of the income of our Jordan Bromine Company Limited (“JBC”) joint venture, a Free Zones company under the laws of the Hashemite Kingdom of Jordan. Income tax expense for the three-month period ended September 30, 2018 included discrete tax expenses of $1.9 million from stock-based compensation arrangements and $1.7 million related to the accounting for the U.S. Tax Cuts and Jobs Act (“TCJA”), partially offset by discrete tax benefits of $2.0 million from foreign accrual to return adjustments and $1.2 million from the release of foreign valuation allowances. Income tax expense for the nine-month period ended September 30, 2018 included discrete tax expenses of $42.0 million for the disposition of the polyolefin catalysts and components portion of our Performance Catalyst Solutions (“PCS”) business (“Polyolefin Catalysts Divestiture”) and $7.3 million for adjustments to foreign valuation allowances, partially offset by discrete tax benefits of $8.0 million for tax accounting method changes, $4.8 million for adjustments related to accounting for the TCJA, $5.4 million from stock-based compensation arrangements and $2.0 million from foreign accrual to return adjustments.