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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2018
Income Taxes [Abstract]  
Income From Continuing Operations Before Income Taxes
Income before income taxes is categorized geographically as follows:
 
Year Ended December 31,
 
2018
 
2017
 
2016
 
(In thousands)
United States
$
420,597

 
$
313,351

 
$
299,304

Foreign
308,919

 
285,661

 
281,869

Total income before income taxes
$
729,516

 
$
599,012

 
$
581,173

Components Of Provision For Income Taxes
The provision for income taxes consisted of the following:
 
Year Ended December 31,
 
2018
 
2017
 
2016
 
(In thousands)
Current expense:
 
 
 
 
 
Federal
$
99,127

 
$
16,870

 
$
34,842

State
1,088

 
294

 
240

Foreign, including withholding tax
76,199

 
15,539

 
19,268

 
176,414

 
32,703

 
54,350

Deferred expense (benefit):
 
 
 
 
 
Federal
(16,448
)
 
90,113

 
64,301

State
42,624

 
19,654

 
21,492

Foreign
(55,563
)
 
(706
)
 
385

 
(29,387
)
 
109,061

 
86,178

Total income tax expense
$
147,027

 
$
141,764

 
$
140,528

Reconciliation Of Income Tax At Effective Income Tax Rate
The difference between income tax expense and the amount resulting from applying the federal statutory rate of 21% in 2018 and 35% in 2017 and 2016, to Income before income taxes is attributable to the following:
 
Year Ended December 31,
 
2018
 
2017
 
2016
 
(In thousands)
Income tax expense at federal statutory rate
$
153,199

 
$
209,654

 
$
203,410

State taxes, net of federal benefit
35,852

 
13,029

 
14,517

Differences between statutory rate and foreign effective tax rate
(46,928
)
 
(83,808
)
 
(79,087
)
Excess tax benefits from stock-based compensation
(9,006
)
 
(7,728
)
 

Capital loss carryforwards expiration
769,706

 

 

Change in valuation allowance
(773,737
)
 
(5,813
)
 
(511
)
U.S. federal tax rate change

 
(186,800
)
 

Transition tax, net of foreign tax credits
(5,602
)
 
162,353

 

U.S. tax on foreign earnings, net of foreign tax credits
24,208

 
4,123

 
2,881

Foreign withholding tax on unremitted foreign earnings, net of foreign tax credits
(812
)
 
33,619

 

Other
147

 
3,135

 
(682
)
Total income tax expense
$
147,027

 
$
141,764

 
$
140,528

Summary Of Deferred Tax Assets And Liabilities
The tax effects of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities are as follows:
 
As of December 31,
 
2018
 
2017
 
(In thousands)
Deferred tax assets:
 
 
 
Net operating loss carryforwards
$
40,729

 
$
70,587

Tax credit carryforwards
3,970

 
52,659

Deferred revenue, accruals and reserves
74,437

 
77,869

Capital loss carryforwards

 
778,430

Other
6,724

 
6,776

Total deferred tax assets
125,860

 
986,321

Valuation allowance
(10,153
)
 
(783,725
)
Net deferred tax assets
115,707

 
202,596

Deferred tax liabilities:
 
 
 
Property and equipment
(2,764
)
 
(1,577
)
Transition tax

 
(162,912
)
Foreign withholding tax on unremitted earnings
(2,733
)
 
(33,619
)
Subordinated Convertible Debentures

 
(430,088
)
Other
(5,352
)
 
(3,116
)
Total deferred tax liabilities
(10,849
)
 
(631,312
)
Total net deferred tax assets (liabilities)
$
104,858

 
$
(428,716
)
Reconciliation Of Gross Unrecognized Tax Benefits
A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:
 
As of December 31,
 
2018
 
2017
 
(In thousands)
Beginning balance
$
223,216

 
$
220,682

Increases in tax positions for prior years
333

 
3,699

Decreases in tax positions for prior years
(196
)
 
(144
)
Increases in tax positions for current year
436

 
395

Decreases in tax positions due to settlement with taxing authorities

 
(1,416
)
Lapse in statute of limitations
(334
)
 

Ending balance
$
223,455

 
$
223,216