Income Taxes (Additional Information) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 20,400,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	3,200,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	100,000
Deferred Tax Assets Excluded, Tax Credit Carryforwards, Foreign	3,900,000
Deferred Tax Assets Excluded, Tax Credit Carryforwards, Research	1,200,000
Deferred Tax Assets Excluded, Tax Credit Carryforwards, Alternative Minimum Tax	400,000
Deferred Tax Assets, Potential Increase (Decrease) in Net Assets if Realized	5,500,000
Less deferred tax asset valuation allowance	(466,000)	(59,442,000)
Income (loss) before income tax expense (benefit)	22,650,000	55,768,000	44,401,000
Undistributed Earnings of Foreign Subsidiaries	130,900,000
Income Taxes Paid, Net	11,600,000	17,100,000	4,600,000
Ending balance	17,333,000	16,133,000	14,331,000
Unrecognized tax benefits that would decrease the effective tax rate if recognized	10,300,000
Deferred Tax Assets, Reversal	700,000	700,000
Unrecognized tax benefits, interest and penalties accrued	2,000,000	1,500,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	2,500,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	3,500,000
Rogers Technologies (Suzhou) Company [Member]
Income Taxes [Line Items]
Effective Income Tax Rate, First Two Years of Profitable Operation	0.00%
Effective tax rate	25.00%	24.00%	22.00%
Income (loss) before income tax expense (benefit)		17,900,000	18,100,000
Rogers (Shanghai) International Trading Company Ltd [Member]
Income Taxes [Line Items]
Effective tax rate		24.00%	22.00%
Income (loss) before income tax expense (benefit)		2,400,000	4,800,000
Germany [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	2,000,000
China [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	$ 1,000,000