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Convertible Senior Notes | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Convertible Senior Notes | Convertible Senior Notes In November 2005, we issued $300.0 million aggregate principal amount of 5.875% convertible senior notes due November 30, 2035 (“5.875% convertible senior notes”). The 5.875% convertible senior notes are unsecured, subordinate to existing and future secured obligations and structurally subordinate to existing and future claims of our subsidiaries’ creditors. These notes (net of repurchases since the issuance dates) are reflected within convertible senior notes on our consolidated balance sheets. No put rights exist under our 5.875% convertible senior notes. In 2016 we repurchased $5.0 million aggregate principal amount of outstanding 5.875% convertible senior notes for $2.3 million plus accrued interest from unrelated third parties. The purchase resulted in a gain of $1.2 million (net of the notes’ applicable share of deferred costs, which were written off in connection with the repurchases). Upon acquisition, the notes were retired. The following summarizes (in thousands) components of our consolidated balance sheets associated with our convertible senior notes:
| As of
| December 31, 2017 |  | December 31, 2016
Face amount of 5.875% convertible senior notes | $ | 88,280 |  |  | $ | 88,280 |
Discount | (26,887 | ) |  | (27,489 | )
Net carrying value | $ | 61,393 |  |  | $ | 60,791 |
Carrying amount of equity component included in additional paid-in capital | $ | 108,714 |  |  | $ | 108,714 |
Excess of instruments’ if-converted values over face principal amounts | $ | — |  |  | $ | — |
During certain periods and subject to certain conditions, the remaining $88.3 million of outstanding 5.875% convertible senior notes as of December 31, 2017 (as referenced in the table above) are convertible by holders into cash and, if applicable, shares of our common stock at an adjusted effective conversion rate of 40.63 shares of common stock per $1,000 principal amount of notes, subject to further adjustment; the conversion rate is based on an adjusted conversion price of $24.61 per share of common stock. Upon any conversion of the notes, we will deliver to holders of the notes cash of up to $1,000 per $1,000 aggregate principal amount of notes and, at our option, either cash or shares of our common stock in respect of the remainder of the conversion obligation, if any. The maximum number of shares of common stock that any note holder may receive upon conversion is fixed at 40.63 shares per $1,000 aggregate principal amount of notes, and we have a sufficient number of authorized shares of our common stock to satisfy this conversion obligation. We are required to pay contingent interest on the notes during a 6-month period if the average trading price of the notes is above a specified level. Thus far we have not paid any contingent interest on these notes. In addition, holders of the notes may require us to repurchase the notes upon certain specified events. In conjunction with the offering of the 5.875% convertible senior notes, we entered into a 30-year share lending agreement with Bear, Stearns International Limited (“BSIL”) and Bear, Stearns & Co. Inc, as agent for BSIL, pursuant to which we lent BSIL 5,677,950 shares of our common stock in exchange for a fee of $0.001 per loaned share upon consummation of the agreement. We exclude the loaned shares from earnings per share computations. The obligations of Bear Stearns were assumed by JP Morgan in 2008. JP Morgan (as the guarantor of the obligation) is required to return the loaned shares to us at the end of the 30-year term of the share lending agreement or earlier upon the occurrence of specified events. Such events include the bankruptcy of JP Morgan, its failure to make payments when due, its failure to post collateral when required or return loaned shares when due, notice of its inability to perform obligations, or its untrue representations. If an event of default occurs, then the borrower (JP Morgan) may settle the obligation in cash. Further, in the event that JP Morgan’s credit rating drops below A/A2, it would be required to post collateral for the market value of the lent shares ($3.5 million based on the 1,459,233 shares remaining outstanding under the share lending arrangement as of December 31, 2017). JP Morgan has agreed to use the loaned shares for the purpose of directly or indirectly facilitating the hedging of our convertible senior notes by the holders thereof or for such other purpose as reasonably determined by us. We deem it highly remote that any event of default will occur and therefore cash settlement, while an option, is an unlikely scenario. We analogize the share lending agreement to a prepaid forward contract, which we have evaluated under applicable accounting guidance. We determined that the instrument was not a derivative in its entirety and that the embedded derivative would not require separate accounting. The net effect on shareholders’ equity of the shares lent pursuant to the share lending agreement, which includes our requirement to lend the shares and the counterparties’ requirement to return the shares, is the fee received upon our lending of the shares. Accounting for Convertible Senior Notes Under applicable accounting literature, the accounting for the issuance of the notes includes (1) allocation of the issuance proceeds between the notes and additional paid-in capital, (2) establishment of a discount to the face amount of the notes equal to the portion of the issuance proceeds that are allocable to additional paid-in capital, (3) creation of a deferred tax liability related to the discount on the notes, and (4) an allocation of issuance costs between the portion of such costs considered to be associated with the notes and the portion of such costs considered to be associated with the equity component of the notes’ issuances (i.e., additional paid-in capital). We are amortizing the discount to the remaining face amount of the notes into interest expense over the expected life of the notes, which results in a corresponding release of associated deferred tax liability. Amortization for the years ended December 31, 2017 and 2016 totaled $0.5 million and $0.5 million, respectively. Actual incurred interest (based on the contractual interest rates within the two convertible senior notes series) totaled $5.2 million and $5.3 million for the years ended December 31, 2017 and 2016, respectively. We will amortize the discount remaining at December 31, 2017 into interest expense over the expected term of the 5.875% convertible senior notes (currently expected to be October 2035). The weighted average effective interest rate for the 5.875% convertible senior notes was 9.2% for all periods presented.

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