Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

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:

	2012		2011		2010
Statutory federal income tax rate	35	%	35	%	35	%
Research and development credit	—		(4	)	(1	)
Qualified production activities credit	(4	)	(2	)	(4	)
State income taxes (net of federal income tax benefit)	(2	)	1		2
Non-deductible stock compensation	1		—		—
Valuation allowance	27		—		—
Other	(1	)	(1	)	1
Effective tax rate	56	%	29	%	33	%

Schedule of Components of Income Tax Expense (Benefit)

The provision for income taxes for the years ended December 31 consisted of the following (in thousands):

	2012			2011			2010
Current:
Federal	$	8,847		$	9,906		$	29,141
State	(1,731		)	585			2,522
Foreign	563			—			—
Total current	7,679			10,491			31,663
Deferred:
Federal	(8,489		)	3,514			(6,259		)
State	16,901			(263		)	(477		)
Foreign	(125		)	—			—
Total deferred	8,287			3,251			(6,736		)
Total provision	$	15,966		$	13,742		$	24,927

Schedule of Deferred Tax Assets and Liabilities

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

	2012			2011
Deferred tax assets:
Accruals and reserves not currently deductible	$	10,331		$	10,945
Deferred income	9,354			11,831
Tax net operating loss and credit carryforwards	6,712			8,596
Non-qualified stock compensation	5,049			3,017
Capitalized research and development	95			73
Unrealized impairment of auction rate securities	208			371
Gross deferred tax assets	31,749			34,833
Valuation allowance	(7,625		)	—
Total deferred tax assets	24,124			34,833
Deferred tax liabilities:
Depreciation	(5,351		)	(5,147		)
State income taxes	—			(88		)
Total deferred tax liability	(5,351		)	(5,235		)
Net deferred tax assets (current and non-current)	$	18,773		$	29,598

Schedule of Unrecognized Tax Benefits Roll Forward

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

Balance at January 1, 2012	$	8,532
Additions based on tax positions related to the current year	487
Additions for tax positions related to prior years	77
Subtractions for tax positions related to prior years	(837		)
Balance at December 31, 2012	$	8,259