Long-Term Debt	12 Months Ended
Dec. 31, 2016
Long-Term Debt.
Long Term Debt	5. Long-Term Debt In November 2016, we completed an underwritten public offering of $230.0 million of 3.250% convertible senior notes, due 2023 (the "Notes") for net proceeds of approximately $222.5 million. We incurred approximately $7.5 million in debt issuance costs, which are being amortized to interest expense over the estimated life of the Notes. The Notes bear an annual interest rate of 3.250%, payable semi-annually in arrears, on November 1 and May 1 of each year, commencing on May 1, 2017. The Notes are our senior unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the notes; equal in right of payment to any of our indebtedness that is not so subordinated; effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries. The Notes will mature on November 1, 2023 (the "Maturity Date"), unless earlier redeemed or repurchased by us or converted. Holders may convert their notes into ordinary shares at an initial conversion rate of 29.0276 shares for each $1,000 principal amount of Notes, which is equivalent to an initial conversion price of approximately $34.45 per share, subject to adjustment, in certain circumstances (including upon the occurrence of a fundamental change), at any time prior to the close of business on the second business day immediately preceding the Maturity Date. Upon the occurrence of a fundamental change involving the Company, holders of the Notes may require the Company to repurchase all or a portion of their Notes for cash at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. In addition, in some circumstances, the conversion rate of the Notes will increase with a make whole premium for conversions in connection with certain fundamental changes. The debt issuance costs related to the Notes offering were capitalized as deferred financing costs and deducted from the carrying value of the financial liability on our consolidated balance sheet at December 31, 2016. The estimated fair value of the Notes was $266.2 million at December 31, 2016 and was based upon observable inputs that may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data including market research publications (Level 2).

5. Long-Term Debt

In November 2016, we completed an underwritten public offering of $230.0 million of 3.250% convertible senior notes, due 2023 (the "Notes") for net proceeds of approximately $222.5 million. We incurred approximately $7.5 million in debt issuance costs, which are being amortized to interest expense over the estimated life of the Notes. The Notes bear an annual interest rate of 3.250%, payable semi-annually in arrears, on November 1 and May 1 of each year, commencing on May 1, 2017.

The Notes are our senior unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the notes; equal in right of payment to any of our indebtedness that is not so subordinated; effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries.

The Notes will mature on November 1, 2023 (the "Maturity Date"), unless earlier redeemed or repurchased by us or converted. Holders may convert their notes into ordinary shares at an initial conversion rate of 29.0276 shares for each $1,000 principal amount of Notes, which is equivalent to an initial conversion price of approximately $34.45 per share, subject to adjustment, in certain circumstances (including upon the occurrence of a fundamental change), at any time prior to the close of business on the second business day immediately preceding the Maturity Date. Upon the occurrence of a fundamental change involving the Company, holders of the Notes may require the Company to repurchase all or a portion of their Notes for cash at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. In addition, in some circumstances, the conversion rate of the Notes will increase with a make whole premium for conversions in connection with certain fundamental changes.

The debt issuance costs related to the Notes offering were capitalized as deferred financing costs and deducted from the carrying value of the financial liability on our consolidated balance sheet at December 31, 2016.

The estimated fair value of the Notes was $266.2 million at December 31, 2016 and was based upon observable inputs that may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data including market research publications (Level 2).