Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Income Before Income Taxes

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

	Year Ended December 31,
	2015			2014		2013
United States	$	88,681		$	25,152	$	91,318
International	(3,117		)	5,609		1,664
Total	$	85,564		$	30,761	$	92,982

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

	Year Ended December 31,
	2015			2014			2013
Current:
U.S. Federal	$	30,970		$	29,089		$	30,989
State	3,139			2,873			3,751
Foreign	6,105			10,930			11,224
	40,214			42,892			45,964
Deferred:
U.S. Federal	(2,645		)	(20,347		)	(6,741		)
State	134			(326		)	(1,164		)
Foreign	(723		)	(246		)	(294		)
	(3,234		)	(20,919		)	(8,199		)
Total	$	36,980		$	21,973		$	37,765

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

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

	Year Ended December 31,
	2015				2014
Deferred Tax Assets:
Accruals and allowances	$	29,279			$	25,756
Net operating loss carryforwards	5,353				6,210
Stock-based compensation	9,895				12,416
Deferred rent	2,740				2,137
Deferred revenue	1,185				1,654
Tax credit carryforwards	2,262				1,769
Acquired intangibles	22,778				21,916
Other	—				142
Total deferred tax assets	73,492				72,000
Deferred Tax Liabilities:
Depreciation and amortization	(967		)		(1,245		)
Other	(438		)		—
Total deferred tax liabilities	(1,405		)		(1,245		)
Valuation Allowance**:	(3,642		)		(3,020		)
Net deferred tax assets	$	68,445			$	67,735
Current portion	$	—			$	29,039
Non-current portion	68,445			*	38,696
Net deferred tax assets	$	68,445			$	67,735

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,
	2015		2014		2013
Tax at federal statutory rate	35.0	%	35.0	%	35.0	%
State, net of federal benefit	2.6	%	2.5	%	2.2	%
Impact of international operations	7.1	%	19.8	%	3.9	%
Stock-based compensation	(0.4	)%	5.5	%	1.8	%
Tax credits	(1.2	)%	(3.8	)%	(1.9	)%
Valuation allowance	—	%	3.5	%	—	%
Goodwill impairment	—	%	7.8	%	—	%
Others	0.1	%	1.1	%	(0.4	)%
Provision for income taxes	43.2	%	71.4	%	40.6	%

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, 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
Additions based on tax positions related to the current year	1,894
Additions for tax positions of prior years	1,722
Settlements	(503		)
Reductions for tax positions of prior years	(152		)
Reductions due to lapse of applicable statutes	(1,838		)
Adjustments due to foreign exchange rate movement	(502		)
Gross UTB Balance at December 31, 2014	$	13,364
Additions based on tax positions related to the current year	1,608
Additions for tax positions of prior years	228
Settlements	(199		)
Reductions for tax positions of prior years	(302		)
Reductions due to lapse of applicable statutes	(1,053		)
Adjustments due to foreign exchange rate movement	(816		)
Gross UTB Balance at December 31, 2015	12,830