Restructuring And Impairment Costs (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended		12 Months Ended	21 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2010	Dec. 31, 2011 employees	Dec. 31, 2010	Mar. 31, 2011	Dec. 31, 2011	Jun. 30, 2011 Termination Of Business Arrangements With Supplier And Processor [Member]	Dec. 31, 2011 Termination Of Business Arrangements With Supplier And Processor [Member]	Dec. 31, 2011 Employee Termination Benefits [Member]	Mar. 31, 2011 Canadian Operations [Member] Special Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Impairment charge - property, plant, and equipment	$ 5,600,000				$ 5,632,000
Restructuring costs		10,200,000	8,300,000
Employee termination benefits					18,278,000			7,100,000	2,400,000
Pension curtailment and settlement costs				4,100,000	4,081,000
Other restructuring costs					$ 3,733,000	$ 3,100,000	$ 3,100,000
Total employees receiving employee termination benefits		320