XML 46 R36.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Equity Compensation (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Assumptions Used in Calculation of Fair Value | Below were the assumptions used in the Monte Carlo calculation:
| June 30, 2018 |  | June 30, 2017
Expected volatility | 34.8% |  | 33.6%
Expected term (in years) | 3.0 |  | 3.0
Risk-free interest rate | 2.28% |  | 1.38%
Summary of Activity Under Stock Option Plans | The following table summarizes the change in number of stock options outstanding for the six months ended June 30, 2018:
| Options Outstanding |  | Weighted- Average Exercise Price Per Share |  | Weighted-Average Remaining Contractual Life in Years |  | Aggregate Intrinsic Value
Outstanding at December 31, 2017 | 33,283 |  |  | $ | 36.40 |  |  | 2.2 |  | $ | 4,177,655 |
Options exercised | (17,683 | ) |  | $ | 39.48 |  |  |  |  |
Options forfeited | — |  |  | $ | — |  |  |  |  |
Options outstanding at June 30, 2018 | 15,600 |  |  | $ | 32.91 |  |  | 2.5 |  | $ | 1,225,308 |
Options exercisable at June 30, 2018 | 15,600 |  |  | $ | 32.91 |  |  | 2.5 |  | $ | 1,225,308 |
Options vested at June 30, 2018 | 15,600 |  |  | $ | 32.91 |  |  | 2.5 |  | $ | 1,225,308 |
Time Based Restricted Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Restricted Stock Activities | The following table summarizes the change in number of time-based restricted stock units outstanding for the six months ended June 30, 2018:
| Time-Based Restricted Stock Units
Awards outstanding at December 31, 2017 | 173,331 |
Awards granted | 41,310 |
Stock issued | (77,513 | )
Awards forfeited | (14,627 | )
Awards outstanding at June 30, 2018 | 122,501 |
Performance-Based Restricted Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Restricted Stock Activities | The following table summarizes the change in number of performance-based restricted stock units outstanding for the six months ended June 30, 2018:
| Performance-Based Restricted Stock Units
Awards outstanding at December 31, 2017 | 169,202 |
Awards granted | 72,160 |
Stock issued | (81,230 | )
Awards forfeited | (17,489 | )
Awards outstanding at June 30, 2018 | 142,643 |
Deferred Stock Units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Restricted Stock Activities | The following table summarizes the change in number of deferred stock units outstanding during the six months ended June 30, 2018:
| Deferred Stock Units
Awards outstanding at December 31, 2017 | 9,250 |
Awards granted | 8,400 |
Stock issued | (8,400 | )
Awards outstanding at June 30, 2018 | 9,250 |

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: 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=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
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=rog_TimeBasedRestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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_DeferredStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |