Write Down of Long-Lived Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 item	Dec. 31, 2011
Write Down of Long-Lived Assets
Write down of long-lived assets	$ 3,084	$ 4,200	$ 15,786	$ 7,318	$ 15,786
Number of manufacturing facilities within Italy				2
Tantalum
Write Down of Long-Lived Assets
Write down of long-lived assets	3,084
Film and Electrolytic
Write Down of Long-Lived Assets
Write down of long-lived assets		$ 4,200