Income Taxes	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes On December 22, 2017 the 2017 Tax Cuts and Jobs Act (“Tax Reform”) was enacted. At December 31, 2017, the Company recorded estimated provisional amounts for the deemed repatriation toll charge implemented by the Tax Reform, related to foreign tax credits, deferred tax revaluation amounts and deferred tax liabilities on unremitted foreign earnings. Staff Accounting Bulletin No. (SAB) 118 provides an extended measurement period to finalize the effects of Tax Reform for the period of enactment. Tax expense for the three and six months ended June 30, 2018 includes no changes from these initial assessments. FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, (GILTI) allows for an election to account for GILTI under the deferred method which requires recognizing deferred taxes for basis differences which will impact the GILTI inclusion upon reversal or as a period cost. The Company is still evaluating this election and will complete its accounting for Tax Reform, including this election, within the measurement period prescribed by SAB 118. Income tax expense has been recorded at an effective tax rate of 24.8% and 26.8% for the three months ended June 30, 2018 and 2017, respectively, and at an effective tax rate of 19.4% and 10.0% for the six months ended June 30, 2018 and 2017, respectively. The lower effective rate for the three months ended June 30, 2018, as compared to the same period in the prior year, was primarily the result of the lower federal statutory tax rate of 21% enacted with Tax Reform which was offset by other provisions of Tax Reform including global intangible low-taxed income (“GILTI”) as well as income earned in foreign jurisdictions with effective tax rates in excess of the federal statutory rate. The higher effective rate for the six months ended June 30, 2018, as compared to the same period in the prior year, was primarily due to stock option income tax benefits which reduced the effective tax rate by 3.0% during the six months ended June 30, 2018 as compared to a reduction of 12.7% during the six months ended June 30, 2017. In addition, the lower federal statutory tax rate of 21% enacted with Tax Reform was offset by other provisions of Tax Reform including global intangible low-taxed income (“GILTI”) as well as income earned in foreign jurisdictions with effective tax rates in excess of the federal statutory rate.

Income Taxes

On December 22, 2017 the 2017 Tax Cuts and Jobs Act (“Tax Reform”) was enacted. At December 31, 2017, the Company recorded estimated provisional amounts for the deemed repatriation toll charge implemented by the Tax Reform, related to foreign tax credits, deferred tax revaluation amounts and deferred tax liabilities on unremitted foreign earnings. Staff Accounting Bulletin No. (SAB) 118 provides an extended measurement period to finalize the effects of Tax Reform for the period of enactment. Tax expense for the three and six months ended June 30, 2018 includes no changes from these initial assessments.

FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, (GILTI) allows for an election to account for GILTI under the deferred method which requires recognizing deferred taxes for basis differences which will impact the GILTI inclusion upon reversal or as a period cost. The Company is still evaluating this election and will complete its accounting for Tax Reform, including this election, within the measurement period prescribed by SAB 118.

Income tax expense has been recorded at an effective tax rate of 24.8% and 26.8% for the three months ended June 30, 2018 and 2017, respectively, and at an effective tax rate of 19.4% and 10.0% for the six months ended June 30, 2018 and 2017, respectively. The lower effective rate for the three months ended June 30, 2018, as compared to the same period in the prior year, was primarily the result of the lower federal statutory tax rate of 21% enacted with Tax Reform which was offset by other provisions of Tax Reform including global intangible low-taxed income (“GILTI”) as well as income earned in foreign jurisdictions with effective tax rates in excess of the federal statutory rate. The higher effective rate for the six months ended June 30, 2018, as compared to the same period in the prior year, was primarily due to stock option income tax benefits which reduced the effective tax rate by 3.0% during the six months ended June 30, 2018 as compared to a reduction of 12.7% during the six months ended June 30, 2017. In addition, the lower federal statutory tax rate of 21% enacted with Tax Reform was offset by other provisions of Tax Reform including global intangible low-taxed income (“GILTI”) as well as income earned in foreign jurisdictions with effective tax rates in excess of the federal statutory rate.