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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Components of Income (Loss) from Continuing Operations | The components of income from continuing operations before provision for income taxes consisted of the following (dollars in thousands):
|  | Year Ended December 31, |
|  |  | 2017 |  |  |  | 2016 |  |  |  | 2015 |
Domestic |  | $ | 577,098 |  |  | $ | 536,869 |  |  | $ | 600,939 |
Foreign |  |  | 586,995 |  |  |  | 343,857 |  |  |  | 278,791 |
|  | $ | 1,164,093 |  |  | $ | 880,726 |  |  | $ | 879,730 |
Tax Provision (Benefit) | Our tax provision (benefit) consisted of the following (dollars in thousands):
|  | Year Ended December 31, |
|  |  | 2017 |  |  |  | 2016 |  |  |  | 2015 |
Federal: |  |  |  |  |  |  |  |  |  |  |  |
Current |  | $ | 275,475 |  |  | $ | 172,380 |  |  | $ | 215,703 |
Deferred |  |  | 39,563 |  |  |  | 27,463 |  |  |  | 1,559 |
|  |  | 315,038 |  |  |  | 199,843 |  |  |  | 217,262 |
State: |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 21,212 |  |  |  | 20,946 |  |  |  | 24,476 |
Deferred |  |  | 5,646 |  |  |  | 375 |  |  |  | 861 |
|  |  | 26,858 |  |  |  | 21,321 |  |  |  | 25,337 |
Foreign: |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 123,840 |  |  |  | 94,909 |  |  |  | 91,048 |
Deferred |  |  | 411 |  |  |  | (19,411 | ) |  |  | (12,794 | )
|  |  | 124,251 |  |  |  | 75,498 |  |  |  | 78,254 |
|  | $ | 466,147 |  |  | $ | 296,662 |  |  | $ | 320,853 |
Reconciliation of Pre-Tax Income | The following is a reconciliation stated as a percentage of pre-tax income of the U.S. statutory federal income tax rate to our effective tax rate:
|  | Year Ended December 31, |
|  |  | 2017 |  |  |  | 2016 |  |  |  | 2015 |
Federal statutory tax rate |  |  | 35 | % |  |  | 35 | % |  |  | 35 | %
Tax Reform |  |  | 12 |  |  |  | — |  |  |  | — |
State taxes, net of federal benefit |  |  | 2 |  |  |  | 2 |  |  |  | 3 |
Non-deductible expenses |  |  | 2 |  |  |  | — |  |  |  | 1 |
Change in valuation allowance |  |  | (2 | ) |  |  | 2 |  |  |  | (1 | )
Reserves for uncertain tax positions |  |  | (2 | ) |  |  | — |  |  |  | 1 |
Credits and exemptions |  |  | (3 | ) |  |  | (2 | ) |  |  | (2 | )
Foreign rate differential |  |  | (5 | ) |  |  | (2 | ) |  |  | (2 | )
Other |  |  | 1 |  |  |  | (1 | ) |  |  | 1 |
Effective tax rate |  |  | 40 | % |  |  | 34 | % |  |  | 36 | %
Temporary Tax Effects | Cumulative tax effects of temporary differences are shown below at December 31, 2017 and 2016 (dollars in thousands):
|  | December 31, |
|  |  | 2017 |  |  |  | 2016 |
Asset (Liability) |  |  |  |  |  |  |  |
Bonus and deferred compensation |  | $ | 186,093 |  |  | $ | 265,043 |
Net operating losses (NOLs) and state tax credits |  |  | 283,353 |  |  |  | 245,681 |
Bad debt and other reserves |  |  | 56,313 |  |  |  | 75,620 |
Pension obligation |  |  | 22,148 |  |  |  | 29,382 |
Unconsolidated affiliates |  |  | 6,267 |  |  |  | 28,107 |
Investments |  |  | 5,573 |  |  |  | 7,142 |
Foreign tax credits |  |  | — |  |  |  | 53,976 |
Derivative financial instruments |  |  | — |  |  |  | 7,308 |
Property and equipment |  |  | (40,024 | ) |  |  | (87,679 | )
Capitalized costs and intangibles |  |  | (256,087 | ) |  |  | (307,301 | )
All other |  |  | (1,441 | ) |  |  | 2,049 |
Net deferred tax assets before valuation allowance |  |  | 262,195 |  |  |  | 319,328 |
Valuation allowance |  |  | (277,466 | ) |  |  | (284,723 | )
Net deferred tax (liabilities) assets |  | $ | (15,271 | ) |  | $ | 34,605 |
Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2017 and 2016 is as follows (dollars in thousands):
|  | Year Ended December 31, |
|  |  | 2017 |  |  |  | 2016 |
Beginning balance, unrecognized tax benefits |  | $ | (94,915 | ) |  | $ | (92,538 | )
Gross increases - tax positions in prior period |  |  | (1,400 | ) |  |  | (514 | )
Gross decreases - tax positions in prior period |  |  | 23,896 |  |  |  | 358 |
Gross increases - current-period tax positions |  |  | (4,142 | ) |  |  | (4,237 | )
Decreases relating to settlements |  |  | 34,259 |  |  |  | 2,541 |
Reductions as a result of lapse of statute of limitations |  |  | 6,497 |  |  |  | 235 |
Foreign exchange movement |  |  | (21 | ) |  |  | (760 | )
Ending balance, unrecognized tax benefits |  | $ | (35,826 | ) |  | $ | (94,915 | )

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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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