XML 15 R39.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Convertible Notes (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Debt Disclosure [Abstract] |
Schedule of convertible notes |
(Dollars in thousands) | As of December 31, 2012 |  | As of December 31, 2011
5% Convertible Senior Notes due 2014 (the "2014 Notes") | $ | 172,500 |  |  | $ | 172,500 |
Unamortized discount | (24,944 | ) |  | (39,007 | )
Total convertible notes | $ | 147,556 |  |  | $ | 133,493 |
Less current portion | — |  |  | — |
Total long-term convertible notes | $ | 147,556 |  |  | $ | 133,493 |
Schedule of interest expense on notes |
| Years Ended December 31,
| 2012 |  | 2011 |  | 2010
| (in thousands)
2014 Notes coupon interest at a rate of 5% | $ | 8,625 |  |  | $ | 8,625 |  |  | $ | 8,625 |
2014 Notes amortization of discount at an additional effective interest rate of 11.7% | 14,695 |  |  | 12,622 |  |  | 10,116 |
2010 Notes amortization of discount at an effective interest rate of 8.4% | — |  |  | — |  |  | 958 |
Total interest expense on convertible notes | $ | 23,320 |  |  | $ | 21,247 |  |  | $ | 19,699 |

X
- Definition Tabular disclosure of the amounts of interest expense related to convertible notes during the reporting period. + References No definition available. + Details
Name: | rmbs_ScheduleOfInterestExpenseOnConvertibleSeniorNotesTableTextBlock
Namespace Prefix: | rmbs_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration