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Capital Stock and Equity Compensation (Shares of Capital Stock Reserved) (Details) - shares | Dec. 31, 2018 | Dec. 31, 2017
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Common stock shares reserved for future issuance (in shares) | 1,310,521 | 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

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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=6877327&loc=d3e13212-122682 + Details
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