Joint Ventures (Accounted for Under Equity Method of Accounting) (Details)	6 Months Ended
	Jun. 30, 2017
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--12-31
Rogers INOAC Corporation (RIC) | Japan | High Performance Foams
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--10-31
Rogers INOAC Suzhou Corporation (RIS) | China | High Performance Foams
Schedule of Equity Method Investments [Line Items]
Fiscal Year-End	--12-31