Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Tax Contingency [Line Items]
Effective Income Tax Rate, Continuing Operations	27.80%		29.20%
Income Tax Holiday, Aggregate Dollar Amount		$ 700,000		$ 1,900,000
Income Tax Holiday, Income Tax Benefits Per Share		$ 0.02		$ 0.06
Income tax receivable, current	37,600,000		37,600,000
Magnetic Technologies [Member]
Income Tax Contingency [Line Items]
Charges related to inventory purchase accounting	$ 53,891,000	$ 0	$ 69,620,000	$ 0