Employee Savings and Investment Plan (Additional Information) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 13,000,000	$ 13,000,000
Rogers Employee Savings and Investment Plan (RESIP) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
IRS deferral limit	17,500	17,500
Employee compensation subject to employer matching percent	6.00%
Employer contributions	$ 2,700,000	$ 2,100,000	$ 1,700,000
Rogers Employee Savings and Investment Plan (RESIP) [Member] | 100% match [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee compensation subject to employer matching percent	3.50%
Rogers Employee Savings and Investment Plan (RESIP) [Member] | 100% match [Member] | 1% of compensation [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution percent	100.00%
Employee compensation subject to employer matching percent	1.00%
Rogers Employee Savings and Investment Plan (RESIP) [Member] | 50% match [Member] | 5% of compensation [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution percent	50.00%
Employee compensation subject to employer matching percent	5.00%