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Restructuring And Impairment Costs (Reconciliation Of Company's Liability For The Restructuring Costs) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Restructuring Cost and Reserve [Line Items]    
Balance at beginning of year $ 1,562 $ 6,611
Costs charged to expense   6,859
Payments (998) (5,230)
Balance at end of period 564 8,240
Employee Termination Benefits [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance at beginning of year 1,271 6,386
Costs charged to expense   3,762
Payments (782) (5,194)
Balance at end of period 489 4,954
Other Costs [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance at beginning of year 291 225
Costs charged to expense   3,097
Payments (216) (36)
Balance at end of period $ 75 $ 3,286