Joint Ventures - Accounted for Under Equity Method of Accounting (Detail)	9 Months Ended
	Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--12-31
Rogers INOAC Corporation | JAPAN | High Performance Foams
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--10-31
Rogers INOAC Suzhou Corporation | CHINA | High Performance Foams
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--12-31