Organization and Summary of Significant Accounting Policies (Additional Information) (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Original Maturities of three months or less	P3M
Foreign Currency Transaction Gain (Loss), before Tax			$ 800,000	$ 600,000	$ 1,300,000
LIFO Inventory Amount	17,100,000		17,100,000	14,900,000
Percentage of LIFO Inventory	27.00%		27.00%	23.00%
Inventory, LIFO Reserve, Effect on Income, Net			6,500,000	5,900,000
Categories of Intangible Assets	3		3
Accrual for Environmental Loss Contingencies, Gross				51,400,000
Recorded Third-Party Environmental Recoveries Receivable				48,300,000
Environmental Expense and Liabilities	2,900,000	200,000
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure			10.00%
Advertising Expense			2,000,000	3,000,000	1,400,000
Power Electronics Solutions [Member]
Number of operating segments			2
Rogers INOAC Corporation [Member]
Ownership interest in joint venture	50.00%	50.00%	50.00%
Minimum [Member]
Asbestos Forcast Claim Period		5 years
Maximum [Member]
Asbestos Forcast Claim Period	10 years		10 years
5 year forecast [Member]
Accrual for Environmental Loss Contingencies, Gross	30,100,000		30,100,000
Recorded Third-Party Environmental Recoveries Receivable				29,200,000
10 year forecast [Member]
Accrual for Environmental Loss Contingencies, Gross				67,900,000
Recorded Third-Party Environmental Recoveries Receivable				$ 63,300,000
Four Years [Member]
Share-based Compensation			4 years
Three Years [Member]
Share-based Compensation			3 years