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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2018
Income Tax Disclosure [Abstract]  
Schedule of components of income (loss) before income taxes The components of Income (loss) from continuing operations before income taxes in our Consolidated Statements of Operations are as follows:
 
 
For the years ended December 31,
 
 
2018
 
2017
 
2016
 
 
(In thousands)
Domestic
 
$
151,002

 
$
146,383

 
$
236,200

Foreign
 
(158,962
)
 
(45,689
)
 
(19,574
)
Income from continuing operations before income taxes
 
$
(7,960
)
 
$
100,694

 
$
216,626
Schedule of components of the benefit (provision) for income taxes The components of Income tax benefit (provision), net, in our Consolidated Statements of Operations are as follows:
 
 
For the years ended December 31,
 
 
2018
 
2017
 
2016
 
 
(In thousands)
Current benefit (provision):
 
 

 
 

 
 

Federal
 
$
(1,472
)
 
$
(8,652
)
 
$
(19,385
)
State
 
(184
)
 
(1,237
)
 
267

Foreign
 
(2,690
)
 
(2,335
)
 
(2,481
)
Total current benefit (provision)
 
(4,346
)
 
(12,224
)
 
(21,599
)
 
 
 
 
 
 
 
Deferred benefit (provision):
 
 

 
 

 
 

Federal
 
(19,189
)
 
299,693

 
(58,250
)
State
 
(7,365
)
 
2,356

 
(6,232
)
Foreign
 
227

 
(5,539
)
 
5,827

Total deferred benefit (provision)
 
(26,327
)
 
296,510

 
(58,655
)
Total income tax benefit (provision), net
 
$
(30,673
)
 
$
284,286

 
$
(80,254
)
Schedule of income tax rate reconciliation The actual tax provisions for the years ended December 31, 2018, 2017 and 2016 reconcile to the amounts computed by applying the statutory federal tax rate to Income (loss) from continuing operations before income taxes in our Consolidated Statements of Operations as shown below:
 
 
For the years ended December 31,
 
 
2018
 
2017
 
2016
Statutory rate
 
21.0
 %
 
35.0
 %
 
35.0
 %
State income taxes, net of Federal benefit
 
(94.4
)%
 
(12.2
)%
 
5.0
 %
Permanent differences
 
(16.9
)%
 
(0.3
)%
 
1.4
 %
Tax credits
 
68.6
 %
 
(8.1
)%
 
(4.2
)%
Valuation allowance
 
(491.9
)%
 
4.6
 %
 
(0.3
)%
Enactment of Tax Cuts and Job Act of 2017
 
—
 %
 
(301.4
)%
 
—
 %
Rates different than statutory

116.6
 %

—
 %

—
 %
Other
 
11.6
 %
 
0.1
 %
 
0.1
 %
Total effective tax rate
 
(385.4
)%
 
(282.3
)%
 
37.0
 %
Schedule of deferred tax assets and liabilities The components of our deferred tax assets and liabilities are as follows:
 
 
As of December 31,
 
 
2018
 
2017
 
 
(In thousands)
Deferred tax assets:
 
 

 
 

Net operating losses, credit and other carryforwards
 
$
284,300

 
$
278,540

Unrealized losses on investments, net
 
41,852

 
22,260

Accrued expenses
 
22,148

 
23,583

Stock-based compensation
 
10,210

 
9,148

Other assets
 
22,366

 
11,890

Total deferred tax assets
 
380,876

 
345,421

Valuation allowance
 
(109,762
)
 
(66,886
)
Deferred tax assets after valuation allowance
 
271,114

 
278,535

 
 
 
 
 
Deferred tax liabilities:
 
 

 
 

Depreciation and amortization
 
(731,447
)
 
(708,599
)
Other liabilities
 
(1,290
)
 
(1,509
)
Total deferred tax liabilities
 
(732,737
)
 
(710,108
)
Total net deferred tax liabilities
 
$
(461,623
)
 
$
(431,573
)
Schedule of reconciliation of unrecognized tax benefits A reconciliation of the beginning and ending amount of unrecognized income tax benefits is as follows:
 
 
For the years ended December 31,
Unrecognized tax benefit
 
2018
 
2017
 
2016
 
 
(In thousands)
Balance as of beginning of period
 
$
63,296

 
$
63,502

 
$
62,366

Additions based on tax positions related to the current year
 
4,361

 
1,116

 
2,132

Additions based on tax positions related to prior years
 
2,539

 
258

 
3

Reductions based on tax positions related to prior years
 
(656
)
 
(852
)
 
(734
)
Reductions based on tax settlements
 
—

 
—

 
(265
)
Reductions based on expirations of statute of limitations
 
—

 
(728
)
 
—

Balance as of end of period
 
$
69,540

 
$
63,296

 
$
63,502