Income Taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes The Company’s effective tax rate for the three months ended March 31, 2018 is a benefit of 32.6%. Such rate differed from the Federal statutory rate of 21.0% primarily due to U.S. and foreign taxes on our international operations and state taxes. Tax benefits associated with stock-based compensation increased the benefit for income taxes recorded in the current period. The Company’s effective tax rate for the three months ended March 31, 2017 was a benefit of 35.2%. The Company has not finalized the accounting for the effects of the Tax Act due to the complex analysis necessary to determine the historical earnings of foreign subsidiaries, the ability to utilize tax attributes such as foreign tax credits, and the impact of the repeal of the like-kind exchange provision for personal property together with the corresponding impact on deferred tax components and valuation allowances. Therefore, the Company has not recorded any adjustments to the provisional amounts recorded in 2017 during the three months ended March 31, 2018. Any adjustments to provisional amounts recorded in 2017 will be recorded when the Company finalizes its accounting of the tax effects within a subsequent measurement period that will not exceed one year from the date of the enactment of the Tax Act. The Company continues to evaluate whether or not to continue to assert indefinite reinvestment on a part or all of its undistributed foreign earnings. This requires the Company to analyze its global working capital and cash requirements in light of the Tax Act and the potential tax liabilities attributable to a repatriation to the U.S., such as foreign withholding taxes and U.S. tax on currency transaction gains or losses. The Company did not record any deferred taxes attributable to its investments in its foreign subsidiaries. The Company will record the tax effects of any change in its assertion within a subsequent measurement period that will not exceed one year from the date of the enactment of the Tax Act.

Income Taxes

The Company’s effective tax rate for the three months ended March 31, 2018 is a benefit of 32.6%. Such rate differed from the Federal statutory rate of 21.0% primarily due to U.S. and foreign taxes on our international operations and state taxes. Tax benefits associated with stock-based compensation increased the benefit for income taxes recorded in the current period.

The Company’s effective tax rate for the three months ended March 31, 2017 was a benefit of 35.2%.

The Company has not finalized the accounting for the effects of the Tax Act due to the complex analysis necessary to determine the historical earnings of foreign subsidiaries, the ability to utilize tax attributes such as foreign tax credits, and the impact of the repeal of the like-kind exchange provision for personal property together with the corresponding impact on deferred tax components and valuation allowances. Therefore, the Company has not recorded any adjustments to the provisional amounts recorded in 2017 during the three months ended March 31, 2018. Any adjustments to provisional amounts recorded in 2017 will be recorded when the Company finalizes its accounting of the tax effects within a subsequent measurement period that will not exceed one year from the date of the enactment of the Tax Act.

The Company continues to evaluate whether or not to continue to assert indefinite reinvestment on a part or all of its undistributed foreign earnings. This requires the Company to analyze its global working capital and cash requirements in light of the Tax Act and the potential tax liabilities attributable to a repatriation to the U.S., such as foreign withholding taxes and U.S. tax on currency transaction gains or losses. The Company did not record any deferred taxes attributable to its investments in its foreign subsidiaries. The Company will record the tax effects of any change in its assertion within a subsequent measurement period that will not exceed one year from the date of the enactment of the Tax Act.