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Restructuring Costs (Reconciliation Of Company's Liability For The Restructuring Costs) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 1,725 $ 4,890 $ 6,746  
Payments (2,338) (6,182) (4,942)  
Balance 281 894 2,186 $ 382
Employee Termination Benefits [Member]        
Restructuring Cost and Reserve [Line Items]        
Employee termination benefits 1,629 4,354 3,743  
Payments (2,246) (5,684) (2,099)  
Balance 79 696 2,026 382
Other Restructuring [Member]        
Restructuring Cost and Reserve [Line Items]        
Other restructuring costs 96 536 3,003  
Payments (92) (498) (2,843)  
Balance $ 202 $ 198 $ 160 $ 0