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Capital Stock and Equity Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share of Capital Stock Reserved For Possible Future Issuance | Shares of capital stock reserved for possible future issuance were as follows:
| As of December 31,
| 2021 |  | 2020
Shares reserved for issuance under outstanding restricted stock unit awards | 320,381 |  |  | 324,260 |
Deferred compensation to be paid in stock, including deferred stock units | 9,500 |  |  | 12,715 |
Additional shares reserved for issuance under Rogers Corporation 2019 Long-Term Equity Compensation Plan | 869,516 |  |  | 918,809 |
Shares reserved for issuance under the Rogers Corporation Global Stock Ownership Plan for Employees(1) | 5,552 |  |  | 78,678 |
Total | 1,204,949 |  |  | 1,334,462 |
(1) This is an employee stock purchase plan within the meaning of Section 432(b) of the Internal Revenue Code of 1986, as amended, that was discontinued as of December 31, 2021, pursuant to the Merger Agreement.
Schedule of Weighted-Average Assumptions Used |
| Pension Benefits |  | Other Postretirement Benefits
| 2021 |  | 2020 |  | 2021 |  | 2020
Weighted average assumptions used in benefit obligations: |  |  |  |  |  |  |
Discount rate | 2.75 | % |  | 2.50 | % |  | 2.25 | % |  | 1.75 | %
Weighted average assumptions used in net periodic benefit costs: |  |  |  |  |  |  |
Discount rate | 2.50 | % |  | 3.25 | % |  | 1.75 | % |  | 2.75 | %
Expected long-term rate of return on assets | 4.53 | % |  | 4.53 | % |  | — | % |  | — | %
Performance Shares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Weighted-Average Assumptions Used | Below were the assumptions used in the Monte Carlo calculation for each material award granted in 2021, 2020 and 2019:
| February 10, 2021 |  | February 12, 2020 |  | June 3, 2019 |  | February 7, 2019
Expected volatility | 51.0% |  | 41.0% |  | 39.7% |  | 36.7%
Expected term (in years) | 2.9 |  | 2.9 |  | 2.6 |  | 2.9
Risk-free interest rate | 0.18% |  | 1.41% |  | 1.78% |  | 2.43%
Schedule of Restricted Stock And Restricted Stock Activity | A summary of activity of the outstanding performance-based restricted stock units for 2021, 2020 and 2019 is presented below:
| 2021 |  | 2020 |  | 2019
| Awards Outstanding |  | Weighted- Average Grant Date Fair Value |  | Awards Outstanding |  | Weighted- Average Grant Date Fair Value |  | Awards Outstanding |  | Weighted- Average Grant Date Fair Value
Awards outstanding as of January 1 | 111,059 |  |  | $ | 170.84 |  |  | 106,943 |  |  | $ | 161.33 |  |  | 142,434 |  |  | $ | 110.19 |
Awards granted | 41,507 |  |  | 258.17 |  |  | 87,244 |  |  | 131.99 |  |  | 112,160 |  |  | 114.22 |
Stock issued | — |  |  | — |  |  | (75,486) |  |  | 111.54 |  |  | (135,032) |  |  | 69.10 |
Awards forfeited | (38,012) |  |  | 189.69 |  |  | (7,642) |  |  | 179.89 |  |  | (12,619) |  |  | 152.22 |
Awards outstanding as of December 31 | 114,554 |  |  | $ | 196.23 |  |  | 111,059 |  |  | $ | 170.84 |  |  | 106,943 |  |  | $ | 161.33 |
Time Based Restricted Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Restricted Stock And Restricted Stock Activity | A summary of activity of the outstanding time-based restricted stock units for 2021, 2020 and 2019 is presented below:
| 2021 |  | 2020 |  | 2019
| Awards Outstanding |  | Weighted- Average Grant Date Fair Value |  | Awards Outstanding |  | Weighted- Average Grant Date Fair Value |  | Awards Outstanding |  | Weighted- Average Grant Date Fair Value
Awards outstanding as of January 1 | 102,142 |  |  | $ | 120.16 |  |  | 101,685 |  |  | $ | 122.68 |  |  | 117,476 |  |  | $ | 116.10 |
Awards granted | 50,640 |  |  | 180.19 |  |  | 58,807 |  |  | 116.87 |  |  | 62,115 |  |  | 126.92 |
Stock issued | (46,329) |  |  | 146.45 |  |  | (50,868) |  |  | 111.16 |  |  | (68,111) |  |  | 81.53 |
Awards forfeited | (9,464) |  |  | 146.58 |  |  | (7,482) |  |  | 122.87 |  |  | (9,795) |  |  | 116.52 |
Awards outstanding as of December 31 | 96,989 |  |  | $ | 157.49 |  |  | 102,142 |  |  | $ | 120.16 |  |  | 101,685 |  |  | $ | 122.68 |
Deferred Stock Units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Restricted Stock And Restricted Stock Activity | A summary of activity of the outstanding deferred stock units for 2021, 2020 and 2019 is presented below:
| 2021 |  | 2020 |  | 2019
| Awards Outstanding |  | Weighted- Average Grant Date Fair Value |  | Awards Outstanding |  | Weighted- Average Grant Date Fair Value |  | Awards Outstanding |  | Weighted- Average Grant Date Fair Value
Awards outstanding as of January 1 | 12,450 |  |  | $ | 113.96 |  |  | 7,150 |  |  | $ | 170.89 |  |  | 8,400 |  |  | $ | 108.86 |
Awards granted | 6,450 |  |  | 188.60 |  |  | 10,400 |  |  | 108.88 |  |  | 5,950 |  |  | 183.40 |
Stock issued | (9,400) |  |  | 104.68 |  |  | (5,100) |  |  | 183.40 |  |  | (7,200) |  |  | 108.86 |
Awards outstanding as of December 31 | 9,500 |  |  | $ | 173.82 |  |  | 12,450 |  |  | $ | 113.96 |  |  | 7,150 |  |  | $ | 170.89 |

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