XML 31 R28.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Convertible Notes (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Debt Disclosure [Abstract] |
Schedule of convertible notes | The Company’s convertible notes are shown in the following table:
(Dollars in thousands) |  | As of March 31, 2013 |  | As of December 31, 2012
5% Convertible Senior Notes due 2014 (the “2014 Notes”) |  | $ | 172,500 |  |  | $ | 172,500 |
Unamortized discount |  | (21,013 | ) |  | (24,944 | )
Total convertible notes |  | $ | 151,487 |  |  | $ | 147,556 |
Less current portion |  | — |  |  | — |
Total long-term convertible notes |  | $ | 151,487 |  |  | $ | 147,556 |
Schedule of interest expense on notes | Interest expense related to the notes for the three months ended March 31, 2013 and 2012 was as follows:
| Three Months Ended
| March 31,
| 2013 |  | 2012
| (In thousands)
2014 Notes coupon interest at a rate of 5% | $ | 2,157 |  |  | $ | 2,157 |
2014 Notes amortization of discount and debt issuance costs at an additional effective interest rate of 11.7% | 4,089 |  |  | 3,510 |
Total interest expense on convertible notes | $ | 6,246 |  |  | $ | 5,667 |

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