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Income Tax | 9 Months Ended
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Sep. 30, 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 21.0% to pre-tax income as a result of the following for the three and nine months ended September 30, 2019 and 2018, respectively (dollars in thousands):
|  | Three months ended September 30, |  | Nine months ended September 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
Tax provision at U.S. statutory rate |  | $ | 72,889 |  |  | $ | 67,759 |  |  | $ | 172,984 |  |  | $ | 148,654 |
Increase (decrease) in income taxes resulting from: |  |  |  |  |  |  |  |
U.S. Tax Reform provisional adjustments |  | — |  |  | 664 |  |  | — |  |  | (2,685 | )
U.S. Tax Reform valuation allowance adjustments |  | — |  |  | (58,949 | ) |  | — |  |  | (59,139 | )
Foreign tax rate differing from U.S. tax rate |  | 84 |  |  | 7,537 |  |  | 1,373 |  |  | 8,795 |
Differences in tax bases in foreign jurisdictions |  | (9,550 | ) |  | (2,371 | ) |  | (30,626 | ) |  | (9,264 | )
Deferred tax valuation allowance |  | 27,721 |  |  | (5,334 | ) |  | 50,607 |  |  | 5,357 |
Amounts related to tax audit contingencies |  | 3,259 |  |  | 1,851 |  |  | 6,223 |  |  | 650 |
Corporate rate changes |  | 116 |  |  | (166 | ) |  | (1,621 | ) |  | 30 |
Subpart F |  | (26 | ) |  | (99 | ) |  | 440 |  |  | 211 |
Foreign tax credits |  | (651 | ) |  | (544 | ) |  | (759 | ) |  | (1,003 | )
Global intangible low-taxed income, net of credit |  | — |  |  | 7,624 |  |  | — |  |  | 11,916 |
Equity compensation excess benefit |  | (1,034 | ) |  | (817 | ) |  | (6,189 | ) |  | (5,067 | )
Return to provision adjustments |  | (8,362 | ) |  | 4,213 |  |  | (4,400 | ) |  | 4,108 |
Other, net |  | (121 | ) |  | 94 |  |  | 729 |  |  | (492 | )
Total provision for income taxes |  | $ | 84,325 |  |  | $ | 21,462 |  |  | $ | 188,761 |  |  | $ | 102,071 |
Effective tax rate |  | 24.3 | % |  | 6.7 | % |  | 22.9 | % |  | 14.4 | %
The effective tax rates for the third quarter and first nine months of 2019 were higher than the U.S. Statutory rate of 21.0% primarily as a result of valuation allowances established on deferred tax assets in foreign jurisdictions and the accrual of uncertain tax positions, which was partially offset by differences in tax bases of foreign jurisdictions, return to provision adjustments, and tax benefits related to equity compensation. The effective tax rates for the third quarter and first nine months of 2018 were lower than the U.S. Statutory rate of 21.0% primarily as a result of the release of a valuation allowance on foreign tax credits, which was partially offset by income earned in jurisdictions with statutory rate higher than the U.S. tax rate and a tax expense related to global intangible low-taxed income. During the third quarter of 2018 the Company released an uncertain tax position due to the expiration of the statute of limitations and established a new position. The foreign tax credits were used to offset the new uncertain tax liability, resulting in a valuation allowance no longer being necessary. $58.9 million of the release of the valuation allowance was previously established as part of U.S. Tax Reform.

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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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