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Capital Stock and Equity Compensation (Tables)
 12 Months Ended
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,
20212020
Shares reserved for issuance under outstanding restricted stock unit awards320,381 324,260 
Deferred compensation to be paid in stock, including deferred stock units9,500 12,715 
Additional shares reserved for issuance under Rogers Corporation 2019 Long-Term Equity Compensation Plan869,516 918,809 
Shares reserved for issuance under the Rogers Corporation Global Stock Ownership Plan for Employees(1)
5,552 78,678 
Total1,204,949 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 BenefitsOther Postretirement Benefits
2021202020212020
Weighted average assumptions used in benefit obligations:
Discount rate2.75 %2.50 %2.25 %1.75 %
Weighted average assumptions used in net periodic benefit costs:
Discount rate2.50 %3.25 %1.75 %2.75 %
Expected long-term rate of return on assets4.53 %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, 2021February 12, 2020June 3, 2019February 7, 2019
Expected volatility51.0%41.0%39.7%36.7%
Expected term (in years)2.92.92.62.9
Risk-free interest rate0.18%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:
202120202019
Awards OutstandingWeighted-
Average
Grant Date Fair Value		Awards OutstandingWeighted-
Average
Grant Date Fair Value		Awards OutstandingWeighted-
Average
Grant Date Fair Value
Awards outstanding as of January 1111,059 $170.84 106,943 $161.33 142,434 $110.19 
Awards granted41,507 258.17 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 31114,554 $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:
202120202019
Awards OutstandingWeighted-
Average
Grant Date Fair Value		Awards OutstandingWeighted-
Average
Grant Date Fair Value		Awards OutstandingWeighted-
Average
Grant Date Fair Value
Awards outstanding as of January 1102,142 $120.16 101,685 $122.68 117,476 $116.10 
Awards granted50,640 180.19 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 3196,989 $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:
202120202019
Awards OutstandingWeighted-
Average
Grant Date Fair Value		Awards OutstandingWeighted-
Average
Grant Date Fair Value		Awards OutstandingWeighted-
Average
Grant Date Fair Value
Awards outstanding as of January 112,450 $113.96 7,150 $170.89 8,400 $108.86 
Awards granted6,450 188.60 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 319,500 $173.82 12,450 $113.96 7,150 $170.89