Changes in Operations (Details 6) (USD $)	12 Months Ended			3 Months Ended			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Sep. 30, 2010 Segment, Discontinued Operations [Member]	Sep. 30, 2009 Segment, Discontinued Operations [Member]	Dec. 31, 2008 Segment, Discontinued Operations [Member]	Dec. 31, 2009 Segment, Discontinued Operations [Member]
Proceeds from sale of businesses					$ 2,200,000
Deposit received for sale of business						500,000
Gain on disposal of discontinued operation							2,200,000
Insurance recoveries	1,061,000	0	3,143,000	2,800,000
Insurance recoveries, net of tax				$ 2,800,000