Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Domestic and foreign components of income (loss) before income taxes

The following table presents domestic and foreign components of income (loss) before income taxes for the periods presented (in thousands):

	Year Ended December 31,
	2015			2014			2013
Domestic	$	(140,352	)	$	149,453		$	145,421
Foreign	(74,378		)	(118,248		)	(96,193		)
Total	$	(214,730	)	$	31,205		$	49,228

Components of the provision for income taxes

The following table presents the components of the provision (benefit) for income taxes for the periods presented (in thousands):

	Year Ended December 31,
	2015			2014			2013
Current:
Federal	$	7,861		$	99,377		$	35,754
State	2,761			10,343			5,513
Foreign	11,569			11,534			10,358
Total current	22,191			121,254			51,625
Deferred:
Federal	(66,573		)	(67,415		)	(25,469		)
State	(4,270		)	(5,992		)	(2,579		)
Foreign	(1,317		)	(1,322		)	(1,118		)
Total deferred	(72,160		)	(74,729		)	(29,166		)
Total provision (benefit)	$	(49,969	)	$	46,525		$	22,459

Reconciliation of the statutory federal income tax rate

The following table presents a reconciliation of the statutory federal rate and the Company’s effective tax rate for the periods presented:

	Year Ended December 31,
	2015		2014		2013
US federal taxes at statutory rate	35	%	35	%	35	%
State income taxes, net of federal benefit	—		9		4
Foreign rate differential	(15	)	106		36
Permanent differences	—		5		1
Stock-based compensation	(1	)	5		5
Research and development credits	10		(57	)	(56	)
Transaction-related expenses	(6	)	44		23
Other	—		2		(2	)
Total	23	%	149	%	46	%

Components of deferred tax assets and liabilities

The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented (in thousands):

	December 31,
	2015			2014
Deferred tax assets:
Accruals and reserves	$	105,411		$	83,805
Net operating loss carryforwards	78,489			4,083
Tax credit carryforwards	80,462			38,411
Stock-based compensation	60,570			33,194
Other	15,645			11,352
Total deferred tax assets	340,577			170,845
Less: valuation allowance	(102,123		)	(43,671		)
Net deferred tax assets	238,454			127,174
Deferred tax liability:
Prepaid expenses	(4,651		)	(3,891		)
Intangible assets	(110,089		)	(17,863		)
Depreciation	(51,933		)	(20,740		)
Other	(1,909		)	(2,123		)
Total deferred tax liabilities	(168,582		)	(44,617		)
Total net deferred tax assets	$	69,872		$	82,557

Unrecognized tax benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

	Year Ended December 31,
	2015			2014
Unrecognized tax benefits balance at January 1	$	66,508		$	43,735
Gross increase for tax positions of prior years	2,268			2,116
Gross decrease for tax positions of prior years	(1,297		)	(264		)
Gross increase for tax positions of current year	19,470			20,921
Settlements	(5,949		)	—
Gross unrecognized tax benefits at December 31	$	81,000		$	66,508