SENIOR CONVERTIBLE NOTES	6 Months Ended
Jun. 30, 2013
SENIOR CONVERTIBLE NOTES
SENIOR CONVERTIBLE NOTES	9. SENIOR CONVERTIBLE NOTES In January 2013, the Company issued $350 million aggregate principal amount of the 2018 Convertible Notes, in a registered public offering. Interest is payable semiannually in arrears on January 15 and July 15, commencing on July 15, 2013. The 2018 Convertible Notes are senior unsecured obligations that will rank senior in right of payment to any future indebtedness of the Company that is expressly subordinated in right of payment, will rank equal in right of payment to any unsecured indebtedness that is not so subordinated, will rank effectively junior in right of payment to any future secured indebtedness to the extent of the value of the assets securing such indebtedness, and will rank structurally junior to any indebtedness and other liabilities (including trade payables) of our subsidiaries. Prior to July 15, 2018, the 2018 Convertible Notes are convertible only upon certain specified events. The initial conversion rate for the 2018 Convertible Notes is 41.3770 shares of common stock per $1,000 principal amount of the 2018 Convertible Notes, representing an initial effective conversion price of approximately $24.17 per share of common stock. The conversion rate is subject to adjustment for certain events as outlined in the indenture governing the 2018 Convertible Notes, but will not be adjusted for accrued and unpaid interest. The Company received net proceeds of $310,396 from issuance of the 2018 Convertible Notes, net of $11,079 debt issuance costs and net payments of $28,525 related to our hedge transactions. The debt issuance costs have been allocated on a pro-rata basis to the debt ($8,975) and equity ($2,104) components of the transaction. The debt component of the issuance costs is included in Other assets and is being accreted to interest expense over the stated term of the 2018 Convertible Notes. The equity component was netted against the proceeds and included in additional paid-in capital. The Company may not redeem the 2018 Convertible Notes prior to maturity. However, in the event of a fundamental change, as defined in the indenture, the holders of the 2018 Convertible Notes may require us to purchase all or a portion of their 2018 Convertible Notes at a purchase price equal to 100% of the principal amount of the 2018 Convertible Notes, plus accrued and unpaid interest, if any, to the repurchase date. Holders who convert their 2018 Convertible Notes in connection with a make-whole fundamental change, as defined in the indenture, may be entitled to a make-whole premium in the form of an increase in the conversion rate. Prior to July 15, 2018, the 2018 Convertible Notes are convertible only under the following circumstances: (1) during any fiscal quarter commencing after March 31, 2013 (and only during such fiscal quarter), if the last reported sale price of the Company common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the applicable conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “ 2018 Convertible Notes Measurement Period”) in which, for each trading day of such 2018 Convertible Notes Measurement Period, the trading price per $1,000 principal amount of 2018 Convertible Notes on such trading day was less than 98% of the product of the last reported sale price of our common stock on such trading day and the applicable conversion rate on such trading day; or (3) upon the occurrence of specified distributions and corporate events. As of June 30, 2013, none of the conditions allowing holders of the 2018 Convertible Notes to convert had been met. In accordance with the governing accounting guidance, the Company determined that the embedded conversion option in the 2018 Convertible Notes is not required to be separately accounted for as a derivative. However, since the 2018 Convertible Notes are within the scope of the accounting guidance for debt with conversion and other options, the Company is required to separate the 2018 Convertible Notes into a liability component and equity component. The carrying amount of the liability component is calculated by measuring the fair value of a similar liability (including any embedded features other than the conversion option) that does not have an associated equity component. The carrying amount of the equity component representing the embedded conversion option is determined by deducting the fair value of the liability component from the initial proceeds ascribed to the 2018 Convertible Notes as a whole. The excess of the principal amount of the liability component over its carrying amount is amortized to interest cost over the expected life of a similar liability that does not have an associated equity component using the effective interest method. The equity component is not remeasured as long as it continues to meet the conditions for equity classification in the accounting guidance for contracts in an entity’s own equity. The Company has determined that a 5.0% effective interest rate is appropriate to calculate the accretion of the bond discount, which is being recorded as interest expense over the stated term of the 2018 Convertible Notes. (The amount by which interest expense, calculated using the effective interest rate of 5.0%, exceeds the interest expense related to the coupon rate of 1.5% is non-cash interest expense.) The effective rate is based on the interest rate for a similar instrument that does not have a conversion feature. The Company may be required to pay additional interest upon occurrence of certain events as outlined in the indenture governing the 2018 Convertible Notes. As of March 31, 2013, the remaining term of the 2018 Convertible Notes is 5.29 years. Upon conversion of a note, holders of the 2018 Convertible Notes will receive up to the principal amount of the converted note in cash and any excess conversion value (conversion spread) in shares of our common stock. The amount of cash and the number of shares of our common stock, if any, will be based on a 60 trading day observation period as described in the indenture. As described in Note 1 Summary of Significant Accounting Policies, the conversion spread will be included in the denominator for the computation of diluted net income per common share, using the treasury stock method, if the effect is dilutive. As discussed above, to hedge against potential dilution upon conversion of the 2018 Convertible Notes, the Company purchased call options on its common stock. The call options give the Company the right to purchase up to 14,481,950 shares of our common stock at $24.17 per share subject to certain adjustments that correspond to the potential adjustments to the conversion rate for the 2018 Convertible Notes. The Company paid an aggregate of $70,000 to purchase these call options. The call options will expire on July 15, 2018, unless earlier terminated or exercised. To reduce the cost of the hedge, in a separate transaction, the Company sold warrants. These warrants give the holder the right to purchase up to 14,481,950 shares of common stock of the Company at $27.36 per share, subject to certain adjustments. These warrants will be exercisable and will expire in equal installments for a period of 140 trading days beginning on October 15, 2018. The Company received an aggregate of $41,475 from the sale of these warrants. In accordance with governing accounting guidance, the Company concluded that the call options and warrants were indexed to our stock. Therefore, the call options and warrants were classified as equity instruments and will not be marked to market prospectively unless certain conditions occur. The net amount of $28,525 was recorded as a reduction to additional paid-in capital. The settlement terms of the call options provide for net share settlement and the settlement terms of the warrants provide for net share or cash settlement at the option of the Company.

9. SENIOR CONVERTIBLE NOTES

In January 2013, the Company issued $350 million aggregate principal amount of the 2018 Convertible Notes, in a registered public offering. Interest is payable semiannually in arrears on January 15 and July 15, commencing on July 15, 2013.

The 2018 Convertible Notes are senior unsecured obligations that will rank senior in right of payment to any future indebtedness of the Company that is expressly subordinated in right of payment, will rank equal in right of payment to any unsecured indebtedness that is not so subordinated, will rank effectively junior in right of payment to any future secured indebtedness to the extent of the value of the assets securing such indebtedness, and will rank structurally junior to any indebtedness and other liabilities (including trade payables) of our subsidiaries. Prior to July 15, 2018, the 2018 Convertible Notes are convertible only upon certain specified events. The initial conversion rate for the 2018 Convertible Notes is 41.3770 shares of common stock per $1,000 principal amount of the 2018 Convertible Notes, representing an initial effective conversion price of approximately $24.17 per share of common stock. The conversion rate is subject to adjustment for certain events as outlined in the indenture governing the 2018 Convertible Notes, but will not be adjusted for accrued and unpaid interest.

The Company received net proceeds of $310,396 from issuance of the 2018 Convertible Notes, net of $11,079 debt issuance costs and net payments of $28,525 related to our hedge transactions. The debt issuance costs have been allocated on a pro-rata basis to the debt ($8,975) and equity ($2,104) components of the transaction. The debt component of the issuance costs is included in Other assets and is being accreted to interest expense over the stated term of the 2018 Convertible Notes. The equity component was netted against the proceeds and included in additional paid-in capital.

The Company may not redeem the 2018 Convertible Notes prior to maturity. However, in the event of a fundamental change, as defined in the indenture, the holders of the 2018 Convertible Notes may require us to purchase all or a portion of their 2018 Convertible Notes at a purchase price equal to 100% of the principal amount of the 2018 Convertible Notes, plus accrued and unpaid interest, if any, to the repurchase date. Holders who convert their 2018 Convertible Notes in connection with a make-whole fundamental change, as defined in the indenture, may be entitled to a make-whole premium in the form of an increase in the conversion rate.

Prior to July 15, 2018, the 2018 Convertible Notes are convertible only under the following circumstances: (1) during any fiscal quarter commencing after March 31, 2013 (and only during such fiscal quarter), if the last reported sale price of the Company common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the applicable conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “ 2018 Convertible Notes Measurement Period”) in which, for each trading day of such 2018 Convertible Notes Measurement Period, the trading price per $1,000 principal amount of 2018 Convertible Notes on such trading day was less than 98% of the product of the last reported sale price of our common stock on such trading day and the applicable conversion rate on such trading day; or (3) upon the occurrence of specified distributions and corporate events. As of June 30, 2013, none of the conditions allowing holders of the 2018 Convertible Notes to convert had been met.

In accordance with the governing accounting guidance, the Company determined that the embedded conversion option in the 2018 Convertible Notes is not required to be separately accounted for as a derivative. However, since the 2018 Convertible Notes are within the scope of the accounting guidance for debt with conversion and other options, the Company is required to separate the 2018 Convertible Notes into a liability component and equity component. The carrying amount of the liability component is calculated by measuring the fair value of a similar liability (including any embedded features other than the conversion option) that does not have an associated equity component. The carrying amount of the equity component representing the embedded conversion option is determined by deducting the fair value of the liability component from the initial proceeds ascribed to the 2018 Convertible Notes as a whole. The excess of the principal amount of the liability component over its carrying amount is amortized to interest cost over the expected life of a similar liability that does not have an associated equity component using the effective interest method. The equity component is not remeasured as long as it continues to meet the conditions for equity classification in the accounting guidance for contracts in an entity’s own equity.

The Company has determined that a 5.0% effective interest rate is appropriate to calculate the accretion of the bond discount, which is being recorded as interest expense over the stated term of the 2018 Convertible Notes. (The amount by which interest expense, calculated using the effective interest rate of 5.0%, exceeds the interest expense related to the coupon rate of 1.5% is non-cash interest expense.) The effective rate is based on the interest rate for a similar instrument that does not have a conversion feature. The Company may be required to pay additional interest upon occurrence of certain events as outlined in the indenture governing the 2018 Convertible Notes. As of March 31, 2013, the remaining term of the 2018 Convertible Notes is 5.29 years.

Upon conversion of a note, holders of the 2018 Convertible Notes will receive up to the principal amount of the converted note in cash and any excess conversion value (conversion spread) in shares of our common stock. The amount of cash and the number of shares of our common stock, if any, will be based on a 60 trading day observation period as described in the indenture. As described in Note 1 Summary of Significant Accounting Policies, the conversion spread will be included in the denominator for the computation of diluted net income per common share, using the treasury stock method, if the effect is dilutive.

As discussed above, to hedge against potential dilution upon conversion of the 2018 Convertible Notes, the Company purchased call options on its common stock. The call options give the Company the right to purchase up to 14,481,950 shares of our common stock at $24.17 per share subject to certain adjustments that correspond to the potential adjustments to the conversion rate for the 2018 Convertible Notes. The Company paid an aggregate of $70,000 to purchase these call options. The call options will expire on July 15, 2018, unless earlier terminated or exercised. To reduce the cost of the hedge, in a separate transaction, the Company sold warrants. These warrants give the holder the right to purchase up to 14,481,950 shares of common stock of the Company at $27.36 per share, subject to certain adjustments. These warrants will be exercisable and will expire in equal installments for a period of 140 trading days beginning on October 15, 2018. The Company received an aggregate of $41,475 from the sale of these warrants. In accordance with governing accounting guidance, the Company concluded that the call options and warrants were indexed to our stock. Therefore, the call options and warrants were classified as equity instruments and will not be marked to market prospectively unless certain conditions occur. The net amount of $28,525 was recorded as a reduction to additional paid-in capital. The settlement terms of the call options provide for net share settlement and the settlement terms of the warrants provide for net share or cash settlement at the option of the Company.