Capital Stock and Equity Compensation (Shares of Capital Stock Reserved) (Details) - shares	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	1,310,521	1,763,635
Shares reserved for issuance under the stock acquisition program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	0	120,883
Shares reserved for issuance under the Rogers Employee Savings and Investment Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	0	169,044
Shares reserved for issuance under outstanding stock options and restricted stock unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	413,294	545,018
Deferred compensation to be paid in stock, including deferred stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	13,498	17,100
Additional shares reserved for issuance under Rogers Corporation 2009 Long-Term Equity Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	777,385	793,603
Shares reserved for issuance under the Rogers Corporation Global Stock Ownership Plan for Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares reserved for future issuance (in shares)	106,344	117,987