Convertible Senior Notes (Notes)	6 Months Ended
Convertible Senior Notes (Notes)	Jun. 30, 2014
Debt Disclosure [Abstract]
Convertible Senior Notes	CONVERTIBLE SENIOR NOTES On June 3, 2014, the Company closed the sale of $230 million aggregate principal amount of 2.625% Convertible Senior Notes due 2034 (the “Notes”) pursuant to an underwriting agreement dated May 28, 2014. Interest will be paid semi-annually in arrears on December 1 and June 1 of each year, commencing December 1, 2014. The Notes will mature on June 1, 2034, unless earlier converted, redeemed, or repurchased in accordance with the terms of the Notes. The initial conversion rate of the Notes is 31.9020 shares of the Company’s common stock per $1,000 principal amount of Notes (which is equivalent to an initial conversion price of approximately $31.35 per share). The conversion rate will be subject to adjustment upon the occurrence of certain events specified in the indenture governing the Notes. Holders may surrender their Notes for conversion at any time prior to the close of business on the second scheduled trading day immediately preceding the stated maturity date. On or after June 5, 2018 and prior to June 5, 2021, the Company may redeem any or all of the Notes in cash if the closing price of the Company’s common stock exceeds 130% of the conversion price then in effect for a specified number of days, and on or after June 5, 2021, the Company may redeem the Notes without any such condition. Holders of the Notes may require the Company to repurchase all or a portion of their Notes on each of June 5, 2021, June 5, 2024 and June 5, 2029, or following a fundamental change (as defined in the indenture governing the Notes), in each case, at a repurchase price in cash equal to 100% of the principal amount of the Notes being repurchased plus accrued and unpaid interest to, but excluding, the date of repurchase. The Notes are subject to customary events of default, which may result in the acceleration of the maturity of the Notes. The Notes are the Company’s senior unsecured obligations and rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the Notes, rank equally in right of payment with any of the Company’s unsecured indebtedness that is not so subordinated, are effectively junior in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities of the Company’s subsidiaries. The Company received $222.5 million from the issuance of the Notes, net of $7.5 million of debt issuance costs incurred. The debt issuance costs are being amortized over a seven year period using the effective interest method. The Company used all of the net proceeds to fund the acquisition of AngioScore (see Note 2).

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.

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