Property, Plant And Equipment (Narrative) (Details) (USD $)	3 Months Ended		0 Months Ended	1 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Feb. 29, 2012 Pike County, Kentucky [Member]	Aug. 31, 2012 Triad Roof Support Systems, LLC [Member]	Dec. 31, 2009 Triad Roof Support Systems, LLC [Member]
Property, Plant and Equipment [Line Items]
Proceeds from sale of other assets			$ 600,000
Gain on disposition of assets	(925,000)	1,158,000	900,000
Proceeds from sale of business				500,000
Goodwill recorded					200,000
Gain on sale of business				$ 200,000