Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Schedule of Income Before Income Taxes

Income before income taxes consists of the following (in thousands):

	Year Ended December 31,
	2013		2012		2011
United States	$	91,318	$	102,159	$	79,318
International	1,664		27,123		44,892
Total	$	92,982	$	129,282	$	124,210

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
	2013			2012			2011
Current:
U.S. Federal	$	30,989		$	34,666		$	27,415
State	3,751			4,555			3,319
Foreign	11,224			6,097			6,760
	45,964			45,318			37,494
Deferred:
U.S. Federal	(6,741		)	(2,069		)	(3,151		)
State	(1,164		)	(588		)	(713		)
Foreign	(294		)	82			(788		)
	(8,199		)	(2,575		)	(4,652		)
Total	$	37,765		$	42,743		$	32,842

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Net deferred tax assets consist of the following (in thousands):

	Year Ended December 31,
	2013			2012
Deferred Tax Assets:
Accruals and allowances	$	24,488		$	20,738
Net operating loss carryforwards	7,069			7,837
Stock-based compensation	11,061			8,133
Deferred rent	1,963			2,258
Deferred revenue	1,535			1,552
Tax credit carryforwards	1,183			1,410
Acquired intangible assets	1,791			—
Other	—			261
	49,090			42,189
Deferred Tax Liabilities:
Acquired intangible assets	—			(1,107		)
Depreciation and amortization	(1,514		)	(1,535		)
Other	(102		)	—
	(1,616		)	(2,642		)
Net deferred tax assets	47,474			39,547
Current portion	27,239			22,691
Non-current portion	20,235			16,856
Net deferred tax assets	$	47,474		$	39,547

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The effective tax rate differs from the applicable U.S. statutory federal income tax rate as follows:

	Year Ended December 31,
	2013		2012		2011
Tax at federal statutory rate	35.0	%	35.0	%	35.0	%
State, net of federal benefit	2.2	%	2.1	%	1.5	%
Impact of international operations	3.9	%	(4.8	)%	(9.5	)%
Stock-based compensation	1.8	%	0.6	%	—	%
Tax credits	(1.9	)%	0.1	%	(0.7	)%
Others	(0.4	)%	0.1	%	0.1	%
Provision for income taxes	40.6	%	33.1	%	26.4	%

Schedule of Reconciliation of Unrecognized Tax Benefits [Table Text Block]

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

	Federal, State, and Foreign Tax
Gross UTB Balance at December 31, 2010	$	18,432
Additions based on tax positions related to the current year	1,795
Additions for tax positions of prior years	1,015
Settlements	(179		)
Reductions for tax positions of prior years	(2		)
Reductions due to lapse of applicable statutes	(3,699		)
Adjustments due to foreign exchange rate movement	(27		)
Gross UTB Balance at December 31, 2011	17,335
Additions based on tax positions related to the current year	711
Additions for tax positions of prior years	956
Settlements	(2,620		)
Reductions for tax positions of prior years	(3,590		)
Reductions due to lapse of applicable statutes	(449		)
Adjustments due to foreign exchange rate movement	(4		)
Gross UTB Balance at December 31, 2012	12,339
Additions based on tax positions related to the current year	1,866
Additions for tax positions of prior years	4,106
Settlements	(3,134		)
Reductions for tax positions of prior years	(1,163		)
Reductions due to lapse of applicable statutes	(1,314		)
Adjustments due to foreign exchange rate movement	43
Gross UTB Balance at December 31, 2013	$	12,743