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Capital Stock and Equity Compensation (Shares of Capital Stock Reserved) (Details) - shares | Dec. 31, 2020 | Dec. 31, 2019
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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

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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