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Pension And Other Postretirement Benefit Plans (Benefit Obligations, Plan Assets, And Funded Status) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value, beginning of year $ 205,942    
Settlements, plan assets 7,000    
Plan assets at fair value, end of year 213,282    
Pension Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated benefit obligation 258,240 280,626  
Projected benefit obligation 259,928 299,161 302,632
Projected benefit obligation, beginning of year 299,161 302,632  
Service cost 5,190 4,650 4,614
Interest cost 12,223 13,001 13,959
Effect of discount rate change (8,316) 13,798  
Plan amendment (22,145) 0  
Foreign currency exchange rate changes 22 (1,528)  
Settlements, benefit obligation (2,136) (13,027)  
Other (2,586) (6,420)  
Benefit payments (21,485) (13,945)  
Projected benefit obligation, end of year 259,928 299,161 302,632
Plan assets at fair value, beginning of year 205,942 199,525  
Actual return on plan assets 15,758 22,865  
Employer contributions 17,866 11,552  
Foreign currency exchange rate changes (2,663) (1,028)  
Settlements, plan assets (2,136) (13,027)  
Plan assets at fair value, end of year 213,282 205,942 199,525
Funded status of the plans, end of year (46,646) (93,219)  
Other Postretirement Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated benefit obligation 0 0  
Projected benefit obligation 41,846 48,970 48,784
Projected benefit obligation, beginning of year 48,970 48,784  
Service cost 527 467 591
Interest cost 2,106 2,303 2,636
Effect of discount rate change (2,483) 3,068  
Plan amendment 0 0  
Foreign currency exchange rate changes 0 0  
Settlements, benefit obligation 0 0  
Other (4,282) (2,733)  
Benefit payments (2,992) (2,919)  
Projected benefit obligation, end of year 41,846 48,970 48,784
Plan assets at fair value, beginning of year 2,932 3,062  
Actual return on plan assets 97 151  
Employer contributions 2,498 2,638  
Foreign currency exchange rate changes 0 0  
Settlements, plan assets 0 0  
Plan assets at fair value, end of year 2,535 2,932 3,062
Funded status of the plans, end of year $ (39,311) $ (46,038)