Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Loss Before Benefit from Income Taxes

Loss before income taxes consisted of the following (in thousands):

	Year Ended December 31,
	2015			2014			2013
United States	$	(324,805	)	$	(269,426	)	$	(94,455	)
Foreign	(210,320		)	(211,018		)	(85,477		)
Total	$	(535,125	)	$	(480,444	)	$	(179,932	)

Schedule of Benefit from Income Taxes

The provision for (benefit from) income taxes consisted of the following (in thousands):

	Year Ended December 31,
	2015			2014			2013
Federal:
Current	$	—		$	11		$	—
Deferred	—			(36,208		)	(56,212		)
State:
Current	(160		)	255			86
Deferred	—			(3,263		)	(4,564		)
Foreign:
Current	5,604			2,945			1,478
Deferred	(1,354		)	(394		)	(85		)
Total	$	4,090		$	(36,654	)	$	(59,297	)

Schedule of Reconciliation of the Federal Statutory Income Tax Rate to the Effective Tax Rate

Reconciliation of the federal statutory income tax rate to the effective tax rate is as follows:

	Year Ended December 31,
	2015		2014		2013
Federal statutory rate	35.0	%	35.0	%	35.0	%
Effect of:
State taxes, net of federal tax benefit	—		0.6		2.5
Change in valuation allowance	(21.0	)	(11.2	)	13.4
Research and development tax credit	1.1		1.2		0.8
Convertible preferred stock warrants	—		—		(1.3	)
Stock-based compensation	(1.1	)	(1.9	)	2.9
Foreign differential	(14.1	)	(15.6	)	(17.1	)
Non-deductible/non-taxable items	(0.6	)	(0.2	)	—
Other, net	(0.1	)	(0.3	)	(3.2	)
Total	(0.8	)%	7.6	%	33.0	%

Schedule of Components of Deferred Tax Assets and Liabilities

The components of the deferred tax assets and liabilities are as follows (in thousands):

	As of December 31,
	2015			2014
Deferred tax assets:
Net operating loss carryforwards	$	82,201		$	67,451
Accruals and reserves	16,841			9,549
Stock-based compensation	59,872			45,843
Fixed assets	12,122			6,906
Deferred revenue	43,411			23,095
Research and development credits	23,445			14,959
Other deferred tax assets	1,017			802
Gross deferred tax assets	238,909			168,605
Valuation allowance	(81,937		)	(54,872		)
Total deferred tax assets	156,972			113,733
Deferred tax liabilities:
Acquisition related intangibles	(81,621		)	(112,928		)
Other deferred tax liabilities	(92		)	(326		)
Convertible senior notes	(73,427		)	—
Total deferred tax liabilities	(155,140		)	(113,254		)
Total net deferred tax assets	$	1,832		$	479

Schedule of Reconciliation of Gross Unrecognized Tax Benefit

A reconciliation of gross unrecognized tax benefit is as follows (in thousands):

	Year Ended December 31,
	2015		2014			2013
Unrecognized tax benefits at the beginning of the period	$	21,264	$	10,887		$	1,172
Additions for tax positions related to the current year	10,614		10,452			8,789
Increases related to prior year tax positions	24		—			947
Decreases related to prior year tax positions	—		(52		)	—
Decreases based on settlements with taxing authorities	—		—			(21		)
Lapse of statute of limitations	—		(23		)	—
Unrecognized tax benefits at the end of the period	$	31,902	$	21,264		$	10,887