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Income Tax Income Tax | 3 Months Ended
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Mar. 31, 2019
Income Tax Disclosure [Abstract] |
Income Tax Disclosure [Text Block] | Income Tax The provision for income tax expense differed from the amounts computed by applying the U.S. federal income tax statutory rate of 21% to pre-tax income as a result of the following for the three months ended March 31, 2019 and 2018, respectively (dollars in thousands):
|  | Three months ended March 31,
|  | 2019 |  | 2018
Tax provision at U.S. statutory rate |  | $ | 45,478 |  |  | $ | 28,964 |
Increase (decrease) in income taxes resulting from: |  |  |  |
U.S. Tax Reform |  | — |  |  | 775 |
Foreign tax rate differing from U.S. tax rate |  | 664 |  |  | 1,432 |
Differences in tax bases in foreign jurisdictions |  | (15,078 | ) |  | (5,760 | )
Deferred tax valuation allowance |  | 18,544 |  |  | 7,947 |
Amounts related to tax audit contingencies |  | 560 |  |  | 835 |
Corporate rate changes |  | (1,764 | ) |  | 111 |
Subpart F |  | 165 |  |  | 658 |
Foreign tax credits |  | — |  |  | (572 | )
Global intangible low-taxed income, net of credit |  | — |  |  | 4,409 |
Equity compensation excess benefit |  | (1,461 | ) |  | (1,114 | )
Other, net |  | (51 | ) |  | 10 |
Total provision for income taxes |  | $ | 47,057 |  |  | $ | 37,695 |
Effective tax rate |  | 21.7 | % |  | 27.3 | %
The effective tax rate for the three months ended March 31, 2019 and 2018 was higher than the U.S. Statutory tax rate of 21% primarily as a result of income in non-U.S. jurisdictions with tax rates greater than the U.S. and losses in foreign jurisdictions for which the company established a valuation allowance, which was partially offset with tax benefits related to bases differences in non-U.S. jurisdictions. The effective tax for the three months ended March 31, 2018 was further increased due to the inclusion of U.S. tax related to global intangible low-taxed income (“GILTI”).

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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