Summarized Financial Information of Unconsolidated Joint Ventures (Accounted for Under Equity Method of Accounting) (Detail)	12 Months Ended
	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--12-31
Rogers INOAC Corporation [Member] | Japan [Member] | High Performance Foams [Member]
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--10-31
Rogers INOAC Suzhou Corporation [Member] | China [Member] | High Performance Foams [Member]
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--12-31