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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Schedule of components of the Income tax (expense) benefit | Significant components of the Income tax benefit (expense) on earnings from continuing operations were as follows:
For the years ended December 31, | 2017 |  | 2016 |  | 2015
Current: |  |  |  |  |
United States | $ | 28,091 |  |  | $ | (3,414 | ) |  | $ | (6,304 | )
Foreign | (125,663 | ) |  | (91,571 | ) |  | (126,597 | )
State | (400 | ) |  | (166 | ) |  | (392 | )
Total current | (97,972 | ) |  | (95,151 | ) |  | (133,293 | )
Deferred: |  |  |  |  |
United States | 127,457 |  |  | (3,323 | ) |  | (4,629 | )
Foreign | 27,473 |  |  | 32,300 |  |  | 19,319 |
State | 9,855 |  |  | 1,173 |  |  | 873 |
Total deferred | 164,785 |  |  | 30,150 |  |  | 15,563 |
Total income tax benefit (expense) | $ | 66,813 |  |  | $ | (65,001 | ) |  | $ | (117,730 | )
Schedule of components of deferred tax assets and liabilities | Significant components of deferred tax assets and liabilities arising from continuing operations were as follows:
December 31, | 2017 |  | 2016
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ | 705,560 |  |  | $ | 983,202 |
Depreciation | 105,868 |  |  | 72,159 |
Deferred revenue | 57,541 |  |  | 52,693 |
Allowance for doubtful accounts | 26,193 |  |  | 30,379 |
Deferred compensation | 43,440 |  |  | 61,837 |
Unrealized loss | 56,871 |  |  | 71,587 |
Nondeductible reserves | 43,176 |  |  | 40,690 |
Interest | 17,279 |  |  | 10,728 |
Total deferred tax assets | 1,055,928 |  |  | 1,323,275 |
Deferred tax liabilities: |  |  |
Investment in subsidiaries | 115,886 |  |  | 107,400 |
Amortization of intangible assets | 314,390 |  |  | 371,668 |
Other | 1,026 |  |  | 153 |
Total deferred tax liabilities | 431,302 |  |  | 479,221 |
Net deferred tax assets | 624,626 |  |  | 844,054 |
Valuation allowance for net deferred tax assets | (746,835 | ) |  | (1,154,008 | )
Net deferred tax liabilities | $ | (122,209 | ) |  | $ | (309,954 | )
Summary of Valuation Allowance | The reconciliations of the beginning and ending balances of the valuation allowance on deferred tax assets were as follows:
For the years ended December 31, | 2017 |  | 2016 |  | 2015
Balance at beginning of period | $ | 1,154,008 |  |  | $ | 1,092,951 |  |  | $ | 994,434 |
(Deductions) additions to costs and expenses | (33,044 | ) |  | 45,972 |  |  | 157,960 |
Additions: charges to other accounts (a) | — |  |  | 15,085 |  |  | — |
Deductions (b) | (374,129 | ) |  | — |  |  | (59,443 | )
Balance at end of period | $ | 746,835 |  |  | $ | 1,154,008 |  |  | $ | 1,092,951 |
(a) Charges to other accounts includes reclassifications and foreign currency translation. (b) Deductions include reclassifications and foreign currency translation, TCJA-related adjustments described in the paragraph above and reclassifications related to held-for-sale entities.
Schedule of effective income tax rate reconciliation | The reconciliations of the reported Income tax expense to the amount that would result by applying the United States federal statutory tax rate of 35% to income from continuing operations before income taxes were as follows:
For the years ended December 31, | 2017 |  | 2016 |  | 2015
Tax (expense) benefit at the United States statutory rate | $ | (9,380 | ) |  | $ | (150,885 | ) |  | $ | 70,213 |
Permanent differences | (14,927 | ) |  | (29,345 | ) |  | (23,483 | )
State income tax benefit, net of federal tax effect | (702 | ) |  | 654 |  |  | 312 |
Tax effect of foreign income taxed at lower rate | 46,956 |  |  | 87,161 |  |  | 29,267 |
Change in valuation allowance | (114,119 | ) |  | (52,758 | ) |  | (148,912 | )
Effect of tax contingencies | 9,066 |  |  | 28,536 |  |  | (34,572 | )
Tax credits | 19,833 |  |  | 19,414 |  |  | 25,557 |
Withholding taxes | (6,355 | ) |  | (33,791 | ) |  | (35,332 | )
U.S. tax on repatriated earnings | (875 | ) |  | (64,316 | ) |  | (1,451 | )
Impairments | — |  |  | (8,230 | ) |  | (36 | )
Sale of subsidiaries | — |  |  | 139,335 |  |  | — |
Impact of Tax Cuts and Jobs Act: |  |  |  |  |
Transition tax on unremitted earnings | (149,800 | ) |  | — |  |  | — |
Tax effect of rate changes | 66,943 |  |  | — |  |  | — |
Change in valuation allowance | 213,609 |  |  | — |  |  | — |
State income tax benefit, net of federal tax effect | 6,848 |  |  | — |  |  | — |
Other | (284 | ) |  | (776 | ) |  | 707 |
Total income tax benefit (expense) | $ | 66,813 |  |  | $ | (65,001 | ) |  | $ | (117,730 | )
Schedule of beginning and ending amount of unrecognized tax benefits | The reconciliations of the beginning and ending amount of unrecognized tax benefits were as follows:
For the years ended December 31, | 2017 |  | 2016 |  | 2015
Beginning of the period | $ | 86,385 |  |  | $ | 82,522 |  |  | $ | 67,804 |
Additions for tax positions related to prior years | 6,266 |  |  | 12,865 |  |  | 32,388 |
Decreases for tax positions related to prior years | (11,121 | ) |  | (3,474 | ) |  | (12,640 | )
Additions for tax positions related to current year | 12,494 |  |  | 15,231 |  |  | 233 |
Decreases for unrecognized tax benefits as a result of a lapse in the statute of limitations | (7,592 | ) |  | (11,389 | ) |  | (4,919 | )
Settlements for tax positions related to prior years | (49 | ) |  | (9,370 | ) |  | (344 | )
End of the period | $ | 86,383 |  |  | $ | 86,385 |  |  | $ | 82,522 |

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