Capital Stock and Equity Compensation (Shares of Capital Stock Reserved) (Details) - shares	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	1,334,462	1,478,842
Shares reserved for issuance under outstanding restricted stock unit awards (in shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	324,260	315,571
Deferred compensation to be paid in stock, including deferred stock units (in shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	12,715	7,681
Additional shares reserved for issuance under Rogers Corporation 2009 Long-Term Equity Compensation Plan (in shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	918,809	1,063,920
Shares reserved for issuance under the Rogers Corporation Global Stock Ownership Plan for Employees (in shares)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	78,678	91,670