CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 199,858	$ 237,375
Accounts receivable, less allowance for doubtful accounts of $906 and $476	113,540us-gaap_AccountsReceivableNetCurrent	94,876us-gaap_AccountsReceivableNetCurrent
Accounts receivable from joint ventures	2,028us-gaap_DueFromJointVenturesCurrent	1,760us-gaap_DueFromJointVenturesCurrent
Accounts receivable, other	2,788us-gaap_NontradeReceivablesCurrent	1,823us-gaap_NontradeReceivablesCurrent
Taxes receivable	703us-gaap_IncomeTaxesReceivable	606us-gaap_IncomeTaxesReceivable
Inventories	82,239us-gaap_InventoryNet	68,628us-gaap_InventoryNet
Prepaid income taxes	4,726us-gaap_PrepaidTaxes	4,586us-gaap_PrepaidTaxes
Deferred income taxes	11,449us-gaap_DeferredTaxAssetsNetCurrent	8,527us-gaap_DeferredTaxAssetsNetCurrent
Asbestos-related insurance receivables	6,827	6,827
Other current assets	11,008us-gaap_OtherAssetsCurrent	7,046us-gaap_OtherAssetsCurrent
Total current assets	435,166us-gaap_AssetsCurrent	432,054us-gaap_AssetsCurrent
Property, plant and equipment, net of accumulated depreciation of $221,200 and $225,092	179,630us-gaap_PropertyPlantAndEquipmentNet	150,420us-gaap_PropertyPlantAndEquipmentNet
Investments in unconsolidated joint ventures	17,057us-gaap_EquityMethodInvestments	17,214us-gaap_EquityMethodInvestments
Deferred income taxes	40,918us-gaap_DeferredTaxAssetsNetNoncurrent	44,853us-gaap_DeferredTaxAssetsNetNoncurrent
Pension Asset	403	403
Goodwill	175,009	98,227
Other intangible assets	82,171us-gaap_OtherIntangibleAssetsNet	38,340us-gaap_OtherIntangibleAssetsNet
Asbestos-related insurance receivables	46,186	46,186
Other long-term assets	8,522us-gaap_OtherAssetsNoncurrent	7,420us-gaap_OtherAssetsNoncurrent
Total assets	985,062us-gaap_Assets	835,117us-gaap_Assets
Current liabilities
Accounts payable	29,954us-gaap_AccountsPayableCurrent	20,020us-gaap_AccountsPayableCurrent
Accrued employee benefits and compensation	26,127us-gaap_AccruedEmployeeBenefitsCurrent	33,983us-gaap_AccruedEmployeeBenefitsCurrent
Accrued income taxes payable	8,402us-gaap_AccruedIncomeTaxesCurrent	6,103us-gaap_AccruedIncomeTaxesCurrent
Current portion of lease obligation	662us-gaap_CapitalLeaseObligationsCurrent	747us-gaap_CapitalLeaseObligationsCurrent
Current portion of long term debt	42,500us-gaap_LongTermDebtCurrent	35,000us-gaap_LongTermDebtCurrent
Asbestos-related liabilities	6,827rog_AsbestosLiabilityCurrent	6,827rog_AsbestosLiabilityCurrent
Other accrued liabilities	24,088us-gaap_OtherLiabilitiesCurrent	17,765us-gaap_OtherLiabilitiesCurrent
Total current liabilities	138,560us-gaap_LiabilitiesCurrent	120,445us-gaap_LiabilitiesCurrent
Long term lease obligation	5,285	6,042
Long term debt	137,500us-gaap_LongTermDebtNoncurrent	25,000us-gaap_LongTermDebtNoncurrent
Pension liability	19,650	17,652
Retiree health care and life insurance benefits	8,768	8,768
Asbestos-related liabilities	49,718rog_AsbestosLiabilityNoncurrent	49,718rog_AsbestosLiabilityNoncurrent
Non-current income tax	12,078us-gaap_AccruedIncomeTaxesNoncurrent	10,544us-gaap_AccruedIncomeTaxesNoncurrent
Deferred income taxes	37,725	14,647
Other long-term liabilities	2,707us-gaap_OtherLiabilitiesNoncurrent	338us-gaap_OtherLiabilitiesNoncurrent
Shareholders’ Equity
Capital Stock - $1 par value; 50,000,000 authorized shares; 18,605,116 and 18,403,109 shares outstanding	18,605us-gaap_CommonStockValue	18,404us-gaap_CommonStockValue
Additional paid-in capital	141,999	137,225
Retained earnings	505,055	491,428
Accumulated other comprehensive income (loss)	(92,588)	(65,094)
Total shareholders' equity	573,071us-gaap_StockholdersEquity	581,963us-gaap_StockholdersEquity
Total liabilities and shareholders' equity	$ 985,062	$ 835,117

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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