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Segment Information (Income by Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Information [Line Items] |  |
Net sales | $ 165,051 us-gaap_SalesRevenueNet | $ 146,640 us-gaap_SalesRevenueNet
Operating income (loss) | 20,100 us-gaap_OperatingIncomeLoss | 21,457 us-gaap_OperatingIncomeLoss
Equity income in unconsolidated joint ventures | 919 us-gaap_IncomeLossFromEquityMethodInvestments | 977 us-gaap_IncomeLossFromEquityMethodInvestments
Other income (expense), net | (129)us-gaap_OtherNonoperatingIncomeExpense | (1,191)us-gaap_OtherNonoperatingIncomeExpense
Interest income (expense), net | (1,006)us-gaap_InterestIncomeExpenseNonoperatingNet | (748)us-gaap_InterestIncomeExpenseNonoperatingNet
Income (loss) before income tax expense (benefit) | 19,884 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 20,495 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Reportable Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 165,051 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 146,640 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Operating income (loss) | 20,100 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 21,457 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Equity income in unconsolidated joint ventures | 919 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 977 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Other income (expense), net | (129)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | (1,191)us-gaap_OtherNonoperatingIncomeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Interest income (expense), net | (1,006)us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | (748)us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Income (loss) before income tax expense (benefit) | 19,884 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 20,495 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Reportable Segment [Member] | Printed Circuit Materials [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 71,287 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PrintedCircuitMaterialsMember | 58,536 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PrintedCircuitMaterialsMember
Operating income (loss) | 12,838 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PrintedCircuitMaterialsMember | 11,960 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PrintedCircuitMaterialsMember
Reportable Segment [Member] | High Performance Foams [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 44,556 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_HighPerformanceFoamsMember | 41,204 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_HighPerformanceFoamsMember
Operating income (loss) | 3,015 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_HighPerformanceFoamsMember | 5,729 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_HighPerformanceFoamsMember
Reportable Segment [Member] | Power Electronics Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 38,529 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PowerElectronicsSolutionsMember | 40,798 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PowerElectronicsSolutionsMember
Operating income (loss) | 2,368 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PowerElectronicsSolutionsMember | 1,565 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rog_PowerElectronicsSolutionsMember
Reportable Segment [Member] | Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 10,679 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 6,102 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Operating income (loss) | $ 1,879 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | $ 2,203 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember

X
- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51673353&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 5 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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