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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2017
Income Taxes [Abstract]  
Schedule of Income Before Income Taxes

Income tax data for the years ended December 31, 2017, 2016 and 2015 is as follows (in thousands):

Year Ended December 31,
201720162015
The components of income from operations before income taxes are
as follows:
Domestic$55,751$35,154$66,716
Foreign585,346564,960475,203
Total$641,097$600,114$541,919
Components of Income Taxes

Income tax data for the years ended December 31, 2017, 2016 and 2015 is as follows (in thousands):

Year Ended December 31,
201720162015
The current and deferred components of the provision for income
taxes on operations are as follows:
Current$575,276$77,407$66,285
Deferred45,5101,2046,581
Total$620,786$78,611$72,866
The jurisdictional components of the provision for income taxes on
operations are as follows:
Federal$535,777$19,693$20,882
State26,5613,0903,389
Foreign58,44855,82848,595
Total$620,786$78,611$72,866
Effective Income Tax Rate Reconciliation

Income tax data for the years ended December 31, 2017, 2016 and 2015 is as follows (in thousands):

Year Ended December 31,
201720162015
The differences between income taxes computed at the United States
statutory rate and the provision for income taxes are summarized
as follows:
Federal tax computed at U.S. statutory income tax rate$224,384$210,040$189,672
2017 Tax Act550,000--
Settlement of tax audits706345(3,258)
State income tax, net of federal income tax benefit1,2892,0082,601
Net effect of foreign operations(134,117)(133,518)(112,426)
Effect of stock-based compensation(19,566)--
Other, net(1,910)(264)(3,723)
Provision for income taxes$620,786$78,611$72,866
Components of Deferred Tax Assets and Liabilities

The tax effects of temporary differences and carryforwards which give rise to deferred tax assets and deferred tax liabilities are summarized as follows (in thousands):

December 31,
20172016
Deferred tax assets:
Net operating losses and credits$75,630$76,027
Depreciation5,9528,310
Stock-based compensation9,81519,609
Deferred compensation21,43424,813
Revaluation of equity investments and licenses3,4654,707
Inventory4,8645,235
Accrued liabilities and reserves8,2308,814
Other11,87315,948
Total deferred tax assets141,263163,463
Valuation allowance(62,098)(61,225)
Deferred tax assets, net of valuation allowance79,165102,238
Deferred tax liabilities:
Capitalized software(19,630)(15,323)
Amortization(3,394)(5,115)
Indefinite-lived intangibles(13,254)(19,680)
Deferred tax liability on foreign earnings(21,000)-
Total deferred tax liabilities(57,278)(40,118)
Net deferred tax assets$21,887$62,120
Unrecognized Tax Benefits Roll Forward

The following is a summary of the activity of the Company’s unrecognized tax benefits for the years ended December 31, 2017, 2016 and 2015 (in thousands):

201720162015
Balance at the beginning of the period$9,964$14,450$19,596
Changes resulting from completion of tax examinations-(828)(2,405)
Other changes in uncertain tax benefits(4,121)(3,658)(2,741)
Balance at the end of the period$5,843$9,964$14,450