Annual report pursuant to Section 13 and 15(d)

Segment and Geographic Information (Details 2)

v2.4.0.6
Segment and Geographic Information (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales $ 203,034 $ 200,297 $ 215,991 $ 223,632 $ 210,668 $ 218,795 $ 265,514 $ 289,856 $ 842,954 $ 984,833 $ 1,018,488
Property, plant and equipment, Goodwill, Intangible assets, net 378,738       394,051       378,738 394,051  
Tantalum
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 412,791 416,995 486,595
Ceramic
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 209,514 213,767 210,509
Film and Electrolytic
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 220,649 354,071 321,384
Net revenue | Sales risk | TTI, Inc.
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 127,700 125,300 133,300
Number of customers whose accounts receivable balances exceeded 10% of gross accounts receivable                 1 1 1
Net revenue | Sales risk | TTI, Inc. | Tantalum
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 73,200 68,000 81,300
Net revenue | Sales risk | TTI, Inc. | Ceramic
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 45,800 44,300 44,200
Net revenue | Sales risk | TTI, Inc. | Film and Electrolytic
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 8,700 13,000 7,800
Net revenue | Geographic risk
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Number of countries within caption whose net sales exceeded 2% of consolidated net sales                 0 0 0
Disclosure threshold (as a percent)                 2.00% 2.00% 2.00%
United States
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 230,917 237,472 240,775
Property, plant and equipment, Goodwill, Intangible assets, net 136,794       146,876       136,794 146,876  
Hong Kong
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 148,447 147,054 171,129
Germany
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 106,168 143,119 131,107
Europe
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 90,220 137,562 157,348
China
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 74,506 104,524 114,879
Property, plant and equipment, Goodwill, Intangible assets, net 33,873       40,415       33,873 40,415  
United Kingdom
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 34,188 39,512 34,321
Property, plant and equipment, Goodwill, Intangible assets, net 5,246       7,393       5,246 7,393  
Portugal
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Property, plant and equipment, Goodwill, Intangible assets, net 28,716       35,971       28,716 35,971  
Indonesia
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Property, plant and equipment, Goodwill, Intangible assets, net 7,243       7,979       7,243 7,979  
Singapore
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 25,120 33,633 37,118
Italy
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 21,762 32,512 39,525
Property, plant and equipment, Goodwill, Intangible assets, net 56,899       58,976       56,899 58,976  
Asia and Pacific Rim ("APAC")
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 67,542 49,406 58,581
Netherlands
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 24,570 19,455 20,426
Finland
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Property, plant and equipment, Goodwill, Intangible assets, net 6,992       7,904       6,992 7,904  
Macedonia
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Property, plant and equipment, Goodwill, Intangible assets, net 18,724       7,757       18,724 7,757  
Mexico
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Property, plant and equipment, Goodwill, Intangible assets, net 69,870       65,255       69,870 65,255  
Other
                     
Net sales and property, plant and equipment, goodwill, intangible assets                      
Net sales                 19,514 40,584 13,279
Property, plant and equipment, Goodwill, Intangible assets, net $ 14,381       $ 15,525       $ 14,381 $ 15,525