Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Deferred Tax Assets and Liabilities

The significant components of the company’s deferred tax assets and liabilities as of December 31, 2011 and 2010 were (in thousands):

	December 31,
	2011			2010
Current Deferred Tax Assets:
U.S. federal and state net operating loss carryforwards	$	36,028		$	6,020
Accruals, reserves and other		20,322			21,950
Valuation allowance		(4,937	)		(3,622	)
Current deferred tax assets, net		51,413			24,348
Noncurrent Deferred Tax Assets (Liabilities):
U.S. federal and state net operating loss carryforwards		8,448			28,394
Capitalized research and development costs		25,374			23,214
Tax credit and capital loss carryforwards		14,885			18,695
Intangible assets and other		2,159			517
Debt costs		(4,710	)		(6,835	)
Excess tax depreciation and other		(38,969	)		(7,008	)
		7,187			56,977
Valuation allowance		(4,456	)		(9,171	)
Noncurrent deferred tax assets, net		2,731			47,806
Total deferred tax assets, net	$	54,144		$	72,154

Income Tax Provisions from Continuing Operations

The company’s income tax provisions from continuing operations for the years ended December 31, 2011, 2010 and 2009 were comprised of the following (in thousands):

	Years Ended December 31,
	2011			2010			2009
Current:
Federal	$	384		$	960		$	1,127
State		841			816			1,901
Foreign		115			—			—
Total current		1,340			1,776			3,028
Deferred:
Federal		29,558			21,247			16,407
State		(10,259	)		(5,408	)		(7,820	)
Total deferred		19,299			15,839			8,587
Total income tax provision	$	20,639		$	17,615		$	11,615

Effective Income Tax Rate Reconciliation

A reconciliation of the statutory federal income tax rate to the company’s effective tax rate for the years ended December 31, 2011, 2010 and 2009 is as follows:

	2011			2010			2009
U.S. federal statutory rate		35.0	%		35.0	%		35.0	%
State taxes		3.3			3.4			3.4
Extraterritorial income exclusion		(8.7	)		—			—
Research and development credits		(4.5	)		(11.4	)		(17.1	)
Other, net		(1.7	)		0.1			2.2
Changes in valuation allowance, net		—			—			0.6
Effective rate		23.4	%		27.1	%		24.1	%

Changes in Unrecognized Tax Benefits

Changes in the company’s unrecognized tax benefits were as follows (in thousands):

	2011			2010			2009
Unrecognized tax benefits at beginning of year	$	12,386		$	7,508		$	2,891
Additions based on tax positions related to the current year		2,325			4,372			3,430
Additions for tax positions of prior years		2,351			562			1,187
Settlements with taxing authorities and other		—			(56	)		—
Reduction resulting from lapse of statute of limitation		(330	)		—			—
Unrecognized tax benefits at end of year	$	16,732		$	12,386		$	7,508