XML 42 R29.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Convertible Notes (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2016
Debt Disclosure [Abstract] |
ReclassifiedUnamortizedDebtIssuanceCostsReportedInBalanceSheetTableTextBlock [Table Text Block] | The Company adopted ASU 2015-03 during the first quarter of 2016. Pursuant to the guidance in ASU 2015-03, the Company has reclassified unamortized debt issuance costs associated with the Company's 2018 Notes in the previously reported Consolidated Balance Sheet as of December 31, 2015, as follows:
(In thousands) |  | As presented December 31, 2015 |  | Reclassifications |  | As adjusted December 31, 2015
Other assets |  | $ | 3,648 |  |  | $ | (1,483 | ) |  | $ | 2,165 |
Convertible notes, long-term |  | 120,901 |  |  | (1,483 | ) |  | 119,418 |
Schedule of convertible notes | The Company’s convertible notes are shown in the following table:
(In thousands) |  | As of March 31, 2016 |  | As of December 31, 2015
1.125% Convertible Senior Notes due 2018 |  | $ | 138,000 |  |  | $ | 138,000 |
Unamortized discount |  | (15,589 | ) |  | (17,099 | )
Unamortized debt issuance costs |  | (1,342 | ) |  | (1,483 | )
Total convertible notes |  | $ | 121,069 |  |  | $ | 119,418 |
Less current portion |  | — |  |  | — |
Total long-term convertible notes |  | $ | 121,069 |  |  | $ | 119,418 |
Schedule of interest expense on notes | Interest expense related to the notes for the three months ended March 31, 2016 and 2015 was as follows:
| Three Months Ended
| March 31,
| 2016 |  | 2015
| (In thousands)
2018 Notes coupon interest at a rate of 1.125% | $ | 388 |  |  | $ | 403 |
2018 Notes amortization of discount and debt issuance costs at an additional effective interest rate of 5.5% | 1,651 |  |  | 1,559 |
Total interest expense on convertible notes | $ | 2,039 |  |  | $ | 1,962 |

X
- Definition Tabular disclosure for the reclassification of debt issuance cost reported in the balance sheet. + References No definition available. + Details
Name: | rmbs_ReclassifiedUnamortizedDebtIssuanceCostsReportedInBalanceSheetTableTextBlockTableTextBlock
Namespace Prefix: | rmbs_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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
- References No definition available. + 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