Income Taxes (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Taxes
Effective income tax rate from continuing operations (as a percent)	44.20%		3.90%	(62.50%)	(6.80%)
Income tax expense (benefit)	$ (2,223,000)		$ (3,085,000)	$ 26,269,000	$ 4,208,000
Federal statutory tax rate (as a percent)			35.00%	35.00%	35.00%
Increase in the net value of the deferred tax assets	$ 2,200,000
Cumulative loss position period		3 years
Reconciliation of effective income tax rate to federal statutory tax rate
Valuation allowance against deferred tax assets (as a percent)				(75.00%)
Write-off of goodwill (as a percent)				(20.00%)
Stock-based compensation shortfalls (as a percent)				(8.00%)