Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Income before Income Tax, Domestic and Foreign

Income before provision for income taxes consisted of the following (in thousands):



	Year ended December 31,
	2015		2014		2013
Domestic	$	87,803	$	94,784	$	31,993
Foreign	98,298		95,585		61,146
Total Income before provision for income taxes	$	186,101	$	190,369	$	93,139

Schedule of Components of Income Tax Expense (Benefit)

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



	Year Ended December 31,
	2015			2014		2013
Federal
Current	$	28,596		$	1,569	$	26
Deferred	6,679			37,570		24,262
	35,275			39,139		24,288
State
Current	3,271			2,162		1,235
Deferred	(703		)	971		1,158
	2,568			3,133		2,393
Foreign
Current	4,305			1,596		3,113
Deferred	(67		)	669		(950		)
	4,238			2,265		2,163
Provision for income taxes	$	42,081		$	44,537	$	28,844

Schedule of Effective Income Tax Rate Reconciliation

The differences between income taxes using the federal statutory income tax rate of 35% and our effective tax rate were as follows:



	Year Ended December 31,
	2015		2014		2013
U.S. federal statutory income tax rate	35.0	%	35.0	%	35.0	%
State income taxes, net of federal tax benefit	1.5		1.6		2.5
Impact of differences in foreign tax rates	(16.2	)	(16.4	)	(20.4	)
Goodwill Impairment	—		—		15.3
Stock-based compensation	1.6		1.0		0.5
Other items not individually material	0.7		2.2		(1.9	)
	22.6	%	23.4	%	31.0	%

Schedule of Deferred Tax Assets and Liabilities

As of December 31, 2015 and 2014, the significant components of our deferred tax assets and liabilities were (in thousands):



	Year Ended December 31,
	2015			2014
Deferred tax assets:
Net operating loss and capital loss carryforwards	$	31,247		$	33,202
Credit carryforwards	1,932			1,446
Deferred revenue	24,432			15,685
Reserves and accruals	17,455			17,203
Translation gains	649			637
Stock-based compensation	16,523			11,964
	92,238			80,137
Deferred tax liabilities:
Prepaid expenses	601			709
Depreciation and amortization	8,555			6,878
	9,156			7,587
Net deferred tax assets before valuation allowance	83,082			72,550
Valuation allowance	(31,685		)	(32,498		)
Net deferred tax assets	$	51,397		$	40,052

Schedule of Unrecognized Tax Benefits Rollforward

The changes in the balance of gross unrecognized tax benefits, which exclude interest and penalties, for fiscal year ended December 31, 2015, 2014, and 2013, is as follows (in thousands):



Unrecognized tax benefit as of December 31, 2012	$	20,639
Tax positions related to current year:
Additions for uncertain tax positions	6,110
Tax positions related to prior year:
Additions for uncertain tax positions	(81		)
Unrecognized tax benefit as of December 31, 2013	26,668
Tax positions related to current year:
Additions for uncertain tax positions	6,659
Tax positions related to prior year:
Decreases for uncertain tax positions	(260		)
Unrecognized tax benefit as of December 31, 2014	33,067
Tax positions related to current year:
Additions for uncertain tax positions	6,346
Tax positions related to prior year:
Decreases for uncertain tax positions	—
Unrecognized tax benefit as of December 31, 2015	$	39,413