Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the statutory federal income tax rate to the effective tax rate for the years ended December 31 was as follows:



	2014		2013		2012
Statutory federal income tax rate	35	%	35	%	35	%
Research and development credit	(14	)	(22	)	—
Qualified production activities deduction	(5	)	(3	)	(4	)
State income taxes (net of federal income tax benefit)	—		—		(2	)
Non-deductible stock compensation	—		1		1
Valuation allowance	—		—		27
Deemed dividend income	—		3		—
Other *	3		(6	)	(1	)
Effective tax rate	19	%	8	%	56	%

* Other, in 2014 and 2013, includes foreign tax rate differential, foreign tax credits and other expenditures not deductible for tax purposes which are all individually insignificant.

Schedule of Components of Income Tax Expense (Benefit)

The provision for income taxes for the years ended December 31, 2014, 2013, and 2012 consisted of the following (in thousands):



	2014			2013			2012
Current:
Federal	$	4,869		$	4,833		$	8,847
State	78			(66		)	(1,731		)
Foreign	544			494			563
Total current	5,491			5,261			7,679
Deferred:
Federal	(2,179		)	(3,698		)	(8,489		)
State	(5		)	(31		)	16,901
Foreign	(140		)	52			(125		)
Total deferred	(2,324		)	(3,677		)	8,287
Total provision	$	3,167		$	1,584		$	15,966

Schedule of Deferred Tax Assets and Liabilities

Deferred tax assets and liabilities at December 31, 2014 and 2013 were as follows (in thousands):



	2014			2013
Deferred tax assets:
Accruals, reserves and other amounts not currently deductible	$	13,034		$	11,346
Deferred income	8,106			9,547
Tax credit carryforwards	12,184			9,170
Non-qualified share-based compensation	6,245			6,115
Capitalized research and development	18			—
Unrealized loss on investments and other	181			278
Gross deferred tax assets	39,768			36,456
Valuation allowance	(12,229		)	(8,999		)
Total deferred tax assets	27,539			27,457
Deferred tax liabilities:
Long-lived assets	(3,265		)	(5,187		)
Foreign undistributed earnings	(18		)	—
Total deferred tax liability	(3,283		)	(5,187		)
Net deferred tax assets (current and non-current)	$	24,256		$	22,270

Schedule of Unrecognized Tax Benefits Roll Forward

The amount of unrecognized tax benefits for the years ended December 31 consisted of the following (in thousands):



	2014			2013			2012
Beginning balance	$	9,433		$	8,259		$	8,532
Additions based on tax positions related to the current year	909			762			487
Additions for tax positions related to prior years	662			1,593			77
Subtractions for tax positions related to prior years and settlements of audits	(4,959		)	(1,181		)	(837		)
Ending balance	$	6,045		$	9,433		$	8,259