Goodwill and Intangible Assets (Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 55,127	$ 61,236
Accumulated Amortization	21,551	17,506
Net Carrying Amount	33,576us-gaap_FiniteLivedIntangibleAssetsNet	43,730us-gaap_FiniteLivedIntangibleAssetsNet
Trademarks and patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,046	1,075
Accumulated Amortization	364	303
Net Carrying Amount	682	772
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,942	37,825
Accumulated Amortization	15,958	13,340
Net Carrying Amount	17,984	24,485
Covenant not-to-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,016	1,056
Accumulated Amortization	823	628
Net Carrying Amount	193	428
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	19,123	21,280
Accumulated Amortization	4,406	3,235
Net Carrying Amount	$ 14,717	$ 18,045

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=rog_PatentsAndTrademarksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: