XML 47 R33.htm IDEA: XBRL DOCUMENT v2.3.0.15

Basis of Presentation (Details)	9 Months Ended
	Sep. 30, 2011
Basis of Presentation
Percentage of ownership for cost method investment, maximum (as a percent)	20.00%

X

- Definition

Represents the maximum percentage of investment in other entities which are being accounted for by using the cost method.

+ Details

Name:	rmbs_CostMethodInvestmentOwnershipPercentageMaximum
Namespace Prefix:	rmbs
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration