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Restructuring And Impairment Costs (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 24 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]      
Restructuring costs $ 0 [1] $ 6,859 [1] $ 33,000
Canadian Operations [Member]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs     $ 12,000
[1] Item is not included in segment operating income, but is included in consolidated operating income.