Discontinued Operations (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 31, 2008 payments	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Discontinued Operations (Textual) [Abstract]
Proceeds from divestiture of businesses, net of cash divested	$ 15,000,000		$ 15,000,000
Number of installments in which proceeds from divestiture of businesses to be received (in payments)	3
Amount per installment to be received from divestiture of business	5,000,000
Period after which first installment received	9 months
Period after which second installment received	18 months
Period after which third installment received	30 months
Capitalized cost of assets held for sale			600,000		600,000
Gain from discontinued operations, net of taxes		$ 0	$ 14,346,000	$ 0	$ 14,278,000
Income (loss) from discontinued operations, net of taxes (in dollars per share)		$ 0.00	$ 0.33	$ 0.00	$ 0.33