Subsequent Events (Details) (Sale [Member], USD $)	6 Months Ended
	Jun. 30, 2011
Sale [Member]
Subsequent Event [Line Items]
Proceeds from divestiture of businesses	$ 11,500,000
Pre-tax gain on sale of assets, disposal group	8,500,000
Purchase price adjustment threshold	373,000
Maximum potential reduction in purchase price	$ 1,700,000