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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of components of the Income tax (expense) benefit | Significant components of the Income tax (expense) benefit on earnings from continuing operations were as follows:
For the years ended December 31, | 2018 |  | 2017 |  | 2016
Current: |  |  |  |  |
United States | $ | (32,861 | ) |  | $ | 28,091 |  |  | $ | 2,285 |
Foreign | (92,275 | ) |  | (99,127 | ) |  | (69,609 | )
State | (262 | ) |  | (400 | ) |  | (166 | )
Total current | (125,398 | ) |  | (71,436 | ) |  | (67,490 | )
Deferred: |  |  |  |  |
United States | 10,536 |  |  | 124,043 |  |  | (2,226 | )
Foreign | (18,137 | ) |  | 27,216 |  |  | 32,786 |
State | (161 | ) |  | 11,485 |  |  | 2,490 |
Total deferred | (7,762 | ) |  | 162,744 |  |  | 33,050 |
Total income tax (expense) benefit | $ | (133,160 | ) |  | $ | 91,308 |  |  | $ | (34,440 | )
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, | 2018 |  | 2017
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ | 597,286 |  |  | $ | 674,088 |
Depreciation | 81,999 |  |  | 99,455 |
Deferred revenue | 56,004 |  |  | 56,651 |
Allowance for doubtful accounts | 21,413 |  |  | 25,525 |
Deferred compensation | 30,818 |  |  | 42,684 |
Unrealized loss | 74,972 |  |  | 56,857 |
Nondeductible reserves | 41,160 |  |  | 40,001 |
Interest | 17,652 |  |  | 17,457 |
Other | — |  |  | 923 |
Total deferred tax assets | 921,304 |  |  | 1,013,641 |
Deferred tax liabilities: |  |  |
Investment in subsidiaries | 97,208 |  |  | 101,437 |
Amortization of intangible assets | 253,147 |  |  | 295,410 |
Other | 1,829 |  |  | — |
Total deferred tax liabilities | 352,184 |  |  | 396,847 |
Net deferred tax assets | 569,120 |  |  | 616,794 |
Valuation allowance for net deferred tax assets | (650,191 | ) |  | (711,767 | )
Net deferred tax liabilities | $ | (81,071 | ) |  | $ | (94,973 | )
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, | 2018 |  | 2017 |  | 2016
Balance at beginning of period | $ | 711,767 |  |  | $ | 1,090,710 |  |  | $ | 1,033,216 |
(Deductions) additions to costs and expenses | (23,814 | ) |  | (19,530 | ) |  | 44,116 |
Charges to other accounts |  |  |  |  |
Additions (a) | — |  |  | — |  |  | 13,378 |
Deductions (b) | (37,762 | ) |  | (359,413 | ) |  | — |
Balance at end of period | $ | 650,191 |  |  | $ | 711,767 |  |  | $ | 1,090,710 |
(a) Charges to other accounts includes reclassifications and foreign currency translation. (b) Deductions include reclassifications and foreign currency translation, and TCJA-related adjustments described in the paragraph above.
Schedule of effective income tax rate reconciliation | The reconciliations of the reported Income tax (expense) benefit to the amount that would result by applying the United States federal statutory tax rate of 21% to income from continuing operations before income taxes were as follows:
For the years ended December 31, | 2018 |  | 2017 |  | 2016
Tax (expense) benefit at the United States statutory rate | $ | (26,971 | ) |  | $ | 24,718 |  |  | $ | (128,482 | )
Permanent differences | 21,704 |  |  | (21,628 | ) |  | (21,636 | )
State income tax benefit, net of federal tax effect | (335 | ) |  | (1,154 | ) |  | 1,510 |
Tax effect of foreign income taxed at lower rate | 16,843 |  |  | 34,652 |  |  | 71,347 |
Change in valuation allowance | (74,267 | ) |  | (111,856 | ) |  | (47,863 | )
Effect of tax contingencies | 4,985 |  |  | 10,980 |  |  | 26,610 |
Tax credits | 13,688 |  |  | 19,829 |  |  | 19,399 |
Withholding taxes | (58,095 | ) |  | 3,901 |  |  | (26,163 | )
U.S. tax on repatriated earnings | — |  |  | (875 | ) |  | (67,796 | )
Impairments | (649 | ) |  | — |  |  | — |
Sale of subsidiaries | — |  |  | — |  |  | 139,335 |
Impact of Tax Cuts and Jobs Act: |  |  |  |  |
Transition tax on unremitted earnings | — |  |  | (160,567 | ) |  | — |
Tax effect of rate changes | — |  |  | 82,392 |  |  | — |
Change in valuation allowance | 9,354 |  |  | 201,946 |  |  | — |
State income tax benefit, net of federal tax effect | (5,350 | ) |  | 8,360 |  |  | — |
GILTI | (34,650 | ) |  | — |  |  | — |
Other | 583 |  |  | 610 |  |  | (701 | )
Total income tax (expense) benefit | $ | (133,160 | ) |  | $ | 91,308 |  |  | $ | (34,440 | )
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, | 2018 |  | 2017 |  | 2016
Beginning of the period | $ | 82,906 |  |  | $ | 82,852 |  |  | $ | 77,179 |
Additions for tax positions related to prior years | 4,379 |  |  | 5,997 |  |  | 12,812 |
Decreases for tax positions related to prior years | (1,541 | ) |  | (10,095 | ) |  | (3,440 | )
Additions for tax positions related to current year | 9,725 |  |  | 11,551 |  |  | 14,795 |
Decreases for unrecognized tax benefits as a result of a lapse in the statute of limitations | (5,282 | ) |  | (7,355 | ) |  | (10,514 | )
Settlements for tax positions related to prior years | (27,574 | ) |  | (44 | ) |  | (7,980 | )
End of the period | $ | 62,613 |  |  | $ | 82,906 |  |  | $ | 82,852 |

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