Income Taxes (Tables)

6 Months Ended

Jun. 30, 2012

Income Tax Disclosure [Abstract]

Income tax expense (benefit)

The Company's income tax expense (benefit) consisted of the following:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2012			2011			2012			2011
Income (loss) before provision for income taxes	$	5,128		$	48,846		$	(6,054	)	$	80,868
Income tax expense (benefit) using estimated annual effective income tax rate	1,904			18,561			(2,247		)	30,730
Out-of-period adjustment related to non-deductible expenses in 2011	—			—			757			—
Impact of discrete item, net	(769		)	464			(769		)	464
Changes in effective tax rates	98			(480		)	—			—
Income tax expense (benefit)	$	1,233		$	18,545		$	(2,259	)	$	31,194