XML 49 R36.htm IDEA: XBRL DOCUMENT
v3.20.4

Capital Stock and Equity Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares of capital stock reserved for possible future issuance | Shares of capital stock reserved for possible future issuance were as follows:
| As of December 31,
| 2020 |  | 2019
Shares reserved for issuance under outstanding restricted stock unit awards | 324,260 |  |  | 315,571 |
Deferred compensation to be paid in stock, including deferred stock units | 12,715 |  |  | 7,681 |
Additional shares reserved for issuance under Rogers Corporation 2019 Long-Term Equity Compensation Plan | 918,809 |  |  | 1,063,920 |
Shares reserved for issuance under the Rogers Corporation Global Stock Ownership Plan for Employees | 78,678 |  |  | 91,670 |
Total | 1,334,462 |  |  | 1,478,842 |
Schedule of weighted-average assumptions used |
| Pension Benefits |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019
Weighted average assumptions used in benefit obligations: |  |  |  |  |  |  |
Discount rate | 2.50 | % |  | 3.25 | % |  | 1.75 | % |  | 2.75 | %
Weighted average assumptions used in net periodic benefit costs: |  |  |  |  |  |  |
Discount rate | 3.25 | % |  | 4.25 | % |  | 2.75 | % |  | 3.75 | %
Expected long-term rate of return on assets | 4.53 | % |  | 4.69 | % |  | — | % |  | — | %
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 2020, 2019 and 2018:
| February 12, 2020 |  | June 3, 2019 |  | February 7, 2019 |  | September 17, 2018 |  | February 8, 2018
Expected volatility | 41.0% |  | 39.7% |  | 36.7% |  | 36.6% |  | 34.8%
Expected term (in years) | 2.9 |  | 2.6 |  | 2.9 |  | 3.0 |  | 3.0
Risk-free interest rate | 1.41% |  | 1.78% |  | 2.43% |  | 2.85% |  | 2.28%
Schedule of restricted stock and restricted stock activity | A summary of activity of the outstanding performance-based restricted stock units for 2020, 2019 and 2018 is presented below:
| 2020 |  | 2019 |  | 2018
| 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 | 106,943 |  |  | $ | 161.33 |  |  | 142,434 |  |  | $ | 110.19 |  |  | 169,202 |  |  | $ | 97.16 |
Awards granted | 87,244 |  |  | 131.99 |  |  | 112,160 |  |  | 114.22 |  |  | 75,760 |  |  | 163.55 |
Stock issued | (75,486) |  |  | 111.54 |  |  | (135,032) |  |  | 69.10 |  |  | (81,230) |  |  | 131.72 |
Awards forfeited | (7,642) |  |  | 179.89 |  |  | (12,619) |  |  | 152.22 |  |  | (21,298) |  |  | 114.40 |
Awards outstanding as of December 31 | 111,059 |  |  | $ | 170.84 |  |  | 106,943 |  |  | $ | 161.33 |  |  | 142,434 |  |  | $ | 110.19 |
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 2020, 2019 and 2018 is presented below:
| 2020 |  | 2019 |  | 2018
| 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 | 101,685 |  |  | $ | 122.68 |  |  | 117,476 |  |  | $ | 116.10 |  |  | 173,331 |  |  | $ | 69.10 |
Awards granted | 58,807 |  |  | 116.87 |  |  | 62,115 |  |  | 126.92 |  |  | 46,810 |  |  | 143.93 |
Stock issued | (50,868) |  |  | 111.16 |  |  | (68,111) |  |  | 81.53 |  |  | (82,921) |  |  | 84.92 |
Awards forfeited | (7,482) |  |  | 122.87 |  |  | (9,795) |  |  | 116.52 |  |  | (19,744) |  |  | 112.06 |
Awards outstanding as of December 31 | 102,142 |  |  | $ | 120.16 |  |  | 101,685 |  |  | $ | 122.68 |  |  | 117,476 |  |  | $ | 116.10 |
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 2020, 2019 and 2018 is presented below:
| 2020 |  | 2019 |  | 2018
| 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 | 7,150 |  |  | $ | 170.89 |  |  | 8,400 |  |  | $ | 108.86 |  |  | 9,250 |  |  | $ | 109.48 |
Awards granted | 10,400 |  |  | 108.88 |  |  | 5,950 |  |  | 183.40 |  |  | 8,400 |  |  | 108.86 |
Stock issued | (5,100) |  |  | 183.40 |  |  | (7,200) |  |  | 108.86 |  |  | (9,250) |  |  | 109.48 |
Awards outstanding as of December 31 | 12,450 |  |  | $ | 113.96 |  |  | 7,150 |  |  | $ | 170.89 |  |  | 8,400 |  |  | $ | 108.86 |

X
- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAssumptionsUsedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=rog_TimeBasedRestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=rog_DeferredStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |