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Income Tax Income Tax | 6 Months Ended
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Jun. 30, 2015
Income Tax Disclosure [Abstract] |
Income Tax Disclosure [Text Block] | Income Tax Provision for income tax expense differed from the amounts computed by applying the U.S. federal income tax statutory rate of 35% to pre-tax income as a result of the following for the three and six months ended June 30, 2015 and 2014 (dollars in thousands):
|  | Three months ended June 30, |  | Six months ended June 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Tax provision at U.S. statutory rate |  | $ | 74,826 |  |  | $ | 105,187 |  |  | $ | 139,270 |  |  | $ | 174,991 |
Increase (decrease) in income taxes resulting from: |  |  |  |  |  |  |  |
Foreign tax rate differing from U.S. tax rate |  | (764 | ) |  | (4,676 | ) |  | (6,285 | ) |  | (7,896 | )
Differences in tax bases in foreign jurisdictions |  | (6,931 | ) |  | (3,564 | ) |  | (13,601 | ) |  | (3,314 | )
Deferred tax valuation allowance |  | 4,967 |  |  | 2,510 |  |  | 11,758 |  |  | (647 | )
Amounts related to tax audit contingencies |  | 952 |  |  | 778 |  |  | 1,905 |  |  | 1,556 |
Subpart F |  | 11,452 |  |  | 3,691 |  |  | 17,886 |  |  | 6,129 |
Foreign tax credits |  | (1,104 | ) |  | (1,155 | ) |  | (3,448 | ) |  | (2,010 | )
Return to provision adjustments |  | (212 | ) |  | 114 |  |  | (4,977 | ) |  | (3,237 | )
Other, net |  | 213 |  |  | (646 | ) |  | (98 | ) |  | (557 | )
Total provision for income taxes |  | $ | 83,399 |  |  | $ | 102,239 |  |  | $ | 142,410 |  |  | $ | 165,015 |
Effective tax rate |  | 39.0 | % |  | 34.0 | % |  | 35.8 | % |  | 33.0 | %
The second quarter and first six months of 2015 effective tax rates were higher than the U.S. Statutory rate of 35.0% primarily as a result of a tax accrual related to the Active Financing Exception ("AFE") business extender provision that the U.S. Congress did not pass prior to the end of the quarter and a loss in Australia which has a lower tax rate than the U.S. The high rate was partially offset with income in other jurisdictions with rates lower than the U.S. The second quarter and first six months of 2014 effective tax rates were lower than the U.S. Statutory rate of 35.0% primarily as a result of income in non-U.S. jurisdictions with lower tax rates than the U.S., and the release of a valuation allowance in the first quarter on tax benefits associated with claims experience on certain treaties, which were partially offset by a tax accrual related to the AFE business extender provision that the U.S. Congress did not pass prior to the end of the quarter.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 + Details
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