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Convertible Notes | 12 Months Ended
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Dec. 31, 2012
Debt Disclosure [Abstract] |
Convertible Notes | Convertible Notes The Company’s convertible notes are shown in the following table.
(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 |
5% Convertible Senior Notes due 2014. On June 29, 2009, the Company issued $150.0 million aggregate principal amount of 5% convertible senior notes due June 15, 2014. As of the date of issuance, the Company determined that the liability component of the 2014 Notes was approximately $92.4 million and the equity component was approximately $57.6 million. On July 10, 2009, an additional $22.5 million of the 2014 Notes were issued as a result of the underwriters exercising their overallotment option. As of the date of issuance of the $22.5 million 2014 Notes, the Company determined that the liability component was approximately $14.3 million, and the equity component was approximately $8.2 million. The unamortized discount related to the 2014 Notes is being amortized to interest expense using the effective interest method over five years through June 2014. The Company will pay cash interest at an annual rate of 5% of the principal amount at issuance, payable semi-annually in arrears on June 15 and December 15 of each year, beginning on December 15, 2009. During 2012, 2011 and 2010, the Company paid approximately $8.6 million of interest related to the 2014 Notes in each year. Issuance costs were approximately $5.1 million of which $3.2 million is related to the liability portion, which is being amortized to interest expense over five years (the expected term of the debt), and $1.9 million is related to the equity portion. The 2014 Notes are the Company’s general unsecured obligation, ranking equal in right of payment to all of the Company’s existing and future senior indebtedness and are senior in right of payment to any of the Company’s future indebtedness that is expressly subordinated to the 2014 Notes. The 2014 Notes are convertible into shares of the Company’s Common Stock at an initial conversion rate of 51.8 shares of Common Stock per $1,000 principal amount of 2014 Notes. This is equivalent to an initial conversion price of approximately $19.31 per share of common stock. Holders may surrender their 2014 Notes for conversion prior to March 15, 2014 only under the following circumstances: (i) during any calendar quarter beginning after the calendar quarter ending September 30, 2009, and only during such calendar quarter, if the closing sale price of the Common Stock for 20 days or more trading days in the period of 30 days consecutive trading days ending on the last trading day of the immediately preceding calendar quarter exceeds 130% of the conversion price in effect on the last trading day of the immediately preceding calendar quarter, (ii) during the five business day period after any 10 days consecutive trading day period in which the trading price per $1,000 principal amount of 2014 Notes for each trading day of such 10 days consecutive trading day period was less than 98% of the product of the closing sale price of the Common Stock for such trading day and the applicable conversion rate, (iii) upon the occurrence of specified distributions to holders of the Common Stock, (iv) upon a fundamental change of the Company as specified in the Indenture governing the 2014 Notes, or (v) if the Company calls any or all of the 2014 Notes for redemption, at any time prior to the close of business on the business day immediately preceding the redemption date. On and after March 15, 2014, holders may convert their 2014 Notes at any time until the close of business on the third business day prior to the maturity date, regardless of the foregoing circumstances. Upon conversion of the 2014 Notes, the Company will pay (i) cash equal to the lesser of the aggregate principal amount and the conversion value of the 2014 Notes and (ii) shares of the Company’s Common Stock for the remainder, if any, of the Company’s conversion obligation, in each case based on a daily conversion value calculated on a proportionate basis for each trading day in the 20 days trading day conversion reference period as further specified in the Indenture. The Company may not redeem the 2014 Notes at its option prior to June 15, 2012. At any time on or after June 15, 2012, the Company will have the right, at its option, to redeem the 2014 Notes in whole or in part for cash in an amount equal to 100% of the principal amount of the 2014 Notes to be redeemed, together with accrued and unpaid interest, if any, if the closing sale price of the Common Stock for at least 20 days of the 30 days consecutive trading days immediately prior to any date the Company gives a notice of redemption is greater than 130% of the conversion price on the date of such notice. Upon the occurrence of a fundamental change, holders may require the Company to repurchase some or all of their 2014 Notes for cash at a price equal to 100% of the principal amount of the 2014 Notes being repurchased, plus accrued and unpaid interest, if any. In addition, upon the occurrence of certain fundamental changes, as that term is defined in the Indenture, the Company will, in certain circumstances, increase the conversion rate for 2014 Notes converted in connection with such fundamental changes by a specified number of shares of Common Stock, not to exceed 15.5401 per $1,000 principal amount of the 2014 Notes. The following events are considered “Events of Default” under the Indenture which may result in the acceleration of the maturity of the 2014 Notes:
(1) | default in the payment when due of any principal of any of the 2014 Notes at maturity, upon redemption or upon exercise of a repurchase right or otherwise;
(2) | default in the payment of any interest, including additional interest, if any, on any of the 2014 Notes, when the interest becomes due and payable, and continuance of such default for a period of 30 days days;
(3) | the Company’s failure to deliver cash or cash and shares of Common Stock (including any additional shares deliverable as a result of a conversion in connection with a make-whole fundamental change) when required to be delivered upon the conversion of any 2014 Note;
(4) | default in the Company’s obligation to provide notice of the occurrence of a fundamental change when required by the Indenture;
(5) | the Company’s failure to comply with any of its other agreements in the 2014 Notes or the Indenture (other than those referred to in clauses (1) through (4) above) for 60 days after the Company’s receipt of written notice to the Company of such default from the trustee or to the Company and the trustee of such default from holders of not less than 25% in aggregate principal amount of the 2014 Notes then outstanding;
(6) | the Company’s failure to pay when due the principal of, or acceleration of, any indebtedness for money borrowed by the Company or any of its subsidiaries in excess of $30 million principal amount, if such indebtedness is not discharged, or such acceleration is not annulled, by the end of a period of ten days after written notice to the Company by the trustee or to the Company and the trustee by the holders of at least 25% in aggregate principal amount of the 2014 Notes then outstanding; and
(7) | certain events of bankruptcy, insolvency or reorganization relating to the Company or any of its material subsidiaries (as defined in the Indenture).
If an event of default, other than an event of default in clause (7) above with respect to the Company occurs and is continuing, either the trustee or the holders of at least 25% in aggregate principal amount of the 2014 Notes then outstanding may declare the principal amount of, and accrued and unpaid interest, including additional interest, if any, on the 2014 Notes then outstanding to be immediately due and payable. If an event of default described in clause (7) above occurs with respect to the Company the principal amount of and accrued and unpaid interest, including additional interest, if any, on the 2014 Notes will automatically become immediately due and payable. Zero Coupon Convertible Senior Notes due 2010. On February 1, 2005, the Company issued $300.0 million aggregate principal amount of zero coupon convertible senior notes due February 1, 2010 (the “2010 Notes”) to Credit Suisse First Boston LLC and Deutsche Bank Securities as initial purchasers who then sold the 2010 Notes to institutional investors. The 2010 Notes were unsecured senior obligations, ranking equally in right of payment with all of Rambus’ existing and future unsecured senior indebtedness, and senior in right of payment to any future indebtedness that is expressly subordinated to the 2010 Notes. The 2010 Notes were convertible at any time prior to the close of business on the maturity date into, in respect of each $1,000 principal of the 2010 Notes:
• | cash in an amount equal to the lesser of
(1) | the principal amount of each note to be converted and
(2) | the “conversion value,” which is equal to (a) the applicable conversion rate, multiplied by (b) the applicable stock price, as defined.
• | if the conversion value is greater than the principal amount of each note, a number of shares of Rambus Common Stock (the “net shares”) equal to the sum of the daily share amounts, calculated as defined. However, in lieu of delivering net shares, Rambus, at its option, may deliver cash, or a combination of cash and shares of its Common Stock, with a value equal to the net shares amount.
The initial conversion price was $26.84 per share of Common Stock (which represented an initial conversion rate of 37.2585 shares of Rambus Common Stock per $1,000 principal amount of the 2010 Notes). The initial conversion price was subject to certain adjustments, as specified in the indenture governing the 2010 Notes. On February 1, 2010, the Company paid upon maturity the remaining $137.0 million in face value of the 2010 Notes. Additional paid-in capital at December 31, 2012 and December 31, 2011 includes $63.9 million related to the equity component of the 2014 Notes. As of December 31, 2012, none of the conversion conditions were met related to the 2014 Notes. Therefore, the classification of the entire equity component for the 2014 Notes in permanent equity is appropriate as of December 31, 2012. Interest expense related to the notes for the years ended December 31, 2012, 2011 and 2010 was as follows:
| 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 |
In 2010, the Company adjusted its interest expense on convertible notes by approximately $0.7 million due to the incorrect amortization of the non-cash debt discount related to the 2014 Notes. The Company concluded that the correction was not material to the previous or present periods.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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