Annual report pursuant to Section 13 and 15(d)

Supplemental Balance Sheets and Statements of Operations Detail (Details 2)

v2.4.0.6
Supplemental Balance Sheets and Statements of Operations Detail (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Total property and equipment    
Property, plant and equipment, gross $ 1,075,906 $ 1,077,370
Accumulated depreciation (771,398) (761,522)
Property, plant and equipment 304,508 315,848
Land and land improvements
   
Total property and equipment    
Useful life 20 years 20 years
Property, plant and equipment, gross 25,824 29,085
Buildings
   
Total property and equipment    
Property, plant and equipment, gross 145,977 136,647
Buildings | Minimum
   
Total property and equipment    
Useful life 20 years 20 years
Buildings | Maximum
   
Total property and equipment    
Useful life 40 years 40 years
Machinery and equipment
   
Total property and equipment    
Useful life 10 years 10 years
Property, plant and equipment, gross 809,884 813,407
Furniture and fixtures
   
Total property and equipment    
Property, plant and equipment, gross 62,072 59,645
Furniture and fixtures | Minimum
   
Total property and equipment    
Useful life 4 years 4 years
Furniture and fixtures | Maximum
   
Total property and equipment    
Useful life 10 years 10 years
Construction in progress
   
Total property and equipment    
Property, plant and equipment, gross $ 32,149 $ 38,586