Changes in Operations Discontinued Operations (Details) (USD $)	3 Months Ended			12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Business Acquisition [Line Items]
Insurance recoveries				$ 5,760,000	$ 1,061,000	$ 0
Insurance recoveries, net of tax	400,000	100,000	700,000
Segment, Discontinued Operations [Member]
Business Acquisition [Line Items]
Insurance recoveries						2,800,000
Insurance recoveries, net of tax						$ 2,800,000