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Recent Accounting Pronouncements (Details) | 6 Months Ended
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Jun. 30, 2011
Recent Accounting Pronouncements |
Number of statements under alternative one | 1
Number of statements presented by the entity | 2

X
- Definition Represents the number of statements presented by the entity to reflect the components of other comprehensive income under the first alternative as per recently issued accounting standards. + Details
Name: | rmbs_NewAccountingPronouncementOrChangeInAccountingPrincipleAlternativeOneNumberOfStatements
Namespace Prefix: | rmbs
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of statements presented by the entity to reflect the net income, total net income, components of other comprehensive income and total of other comprehensive income. + Details
Name: | rmbs_NewAccountingPronouncementOrChangeInAccountingPrincipleNumberOfSeparateStatements
Namespace Prefix: | rmbs
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration