Shareholders' Equity and Equity Compensation (Shares of Capital Stock Reserved) (Details) - shares shares in Thousands	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	1,763,635	1,997,257
Rogers Corporation Stock acquisition program (shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	120,883	120,883
Stock options and restricted stock (shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	545,018	659,302
Rogers Corporation 2009 Long-Term Equity Compensation Plan (shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	793,603	892,163
Rogers Employee and Investment Plan (shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	169,044	169,044
Rogers Corporation Global Stock Ownership Plan for Employees (shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	117,987	133,113
Deferred compensation to be paid in stock, including deferred stock units (shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	17,100	22,752