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Recent Accounting Pronouncements (Details) | 9 Months Ended
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Sep. 30, 2011 Customer step year statement
Recent Accounting Pronouncements |
Number of steps in quantitative goodwill impairment test | 2
Number of statements under alternative one | 1
Number of statements under alternative two | 2

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Period Type: | duration

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- Definition Represents the number of steps in quantitative goodwill impairment test. + Details
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Namespace Prefix: | rmbs
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
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