Convertible debt instruments
In June 2014, we completed an offering for $360.0 million in aggregate principal amount of convertible senior notes due 2019, or the Convertible Notes, in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities’ Act of 1933 (as further described in Note 13). Under International Accounting Standard 32, or IAS 32, we must separately account for the liability and equity components of convertible debt instruments (such as the Convertible Notes) in a manner that reflects the issuer’s economic interest cost. Under this methodology, the instrument is split between its liability and equity components upon initial recognition. The fair value of the liability is measured first, by estimating the fair value of a similar liability that does not have any associated equity conversion option. This becomes the liability’s carrying amount at initial recognition, which is recorded as part of Debt on the consolidated balance sheet. The equity component (the conversion feature) is assigned the residual amount after deducting the amount separately determined for the liability component from the fair value of the instrument as a whole and is recorded as part of Additional paid-in capital within stockholders’ equity on the consolidated balance sheet. Issuance costs are allocated proportionately between the liability and equity components.
The value of the equity component is treated as an original issue discount for purposes of accounting for the liability component of the Convertible Notes. Accordingly, we are required to record non-cash interest expense as a result of the amortization of the discounted carrying value of the Convertible Notes to their face amount over the term of the Convertible Notes. IAS 32 therefore requires interest to include both the current period’s amortization of the debt discount and the instrument’s coupon interest.
