Subsequent Events	12 Months Ended
Dec. 31, 2013
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events February 2018 Notes On February 6, 2014, the Company agreed to sell $260.87 million aggregate principal amount of its February 2018 Notes in an underwritten public offering. The conversion rate of the February 2018 Notes will initially be 109.1048 shares of common stock per $1,000 principal amount of the February 2018 Notes equivalent to an initial conversion price of approximately $9.17 per share of common stock. The Company granted the underwriters an option to purchase up to an additional $39.13 million aggregate principal amount of the February 2018 Notes solely to cover overallotments (or $300 million principal amount in the aggregate). The conversion rate, subject to increase under certain circumstances, will not be increased in respect of regular quarterly cash dividends paid by us that do not exceed $0.15 per share. On February 12, 2014, we issued $300 million aggregate principal amount of February 2018 Notes, which included $39.13 million aggregate principal amount of February 2018 Notes issued pursuant to the exercise of the underwriters’ overallotment option to purchase additional February 2018 Notes. In connection with the offering of the February 2018 Notes, the Company has entered into privately negotiated convertible note hedge transactions with RBC Capital Markets and Wells Fargo Securities. The convertible note hedge transactions will cover, subject to customary anti-dilution adjustments, the number of shares of the Company’s common stock that will initially underlie the February 2018 Notes, and are intended to reduce the dilutive impact of the conversion feature of the February 2018 Notes on the Company’s outstanding shares of common stock. The Company has also entered into privately negotiated warrant transactions with the hedge counterparties relating to the same number of shares of the Company’s common stock. The warrant transactions could separately have a dilutive effect to the extent that the market price per share of the Company’s common stock exceeds the applicable strike price of the warrants on any expiration date of the warrants. Series 2012 Notes Exchange On February 6, 2014, the Company entered into exchange and purchase agreements with certain holders of approximately $131.7 million aggregate principal amount of outstanding Series 2012 Notes. The exchange agreements provide for the issuance, by the Company, of shares of common stock and a cash payment for the Series 2012 Notes being exchanged, and the purchase agreement provides for a cash payment for the Series 2012 Notes being repurchased. The Company issued a total of approximately 20.3 million shares of its common stock and paid an aggregate cash payment of approximately $34.2 million pursuant to the exchange and purchase agreements. Paradigm Spine On February 14, 2014, the Company entered into a credit agreement with Paradigm Spine, LLC, under which it made available to Paradigm up to $75 million to be used by Paradigm to refinance its existing credit facility and expand its domestic commercial operations. A portion of the amount available under the agreement in an aggregate principal amount equal to $50 million, net of fees, was funded at the close of the transaction. In the event that certain specified sales and other milestones occur before December 31, 2014, the Company will fund Paradigm between an additional $6.25 million and $12.5 million, at Paradigm’s discretion. In the event that additional specified sales and other milestones occur before June 30, 2015, the Company will fund up to an additional $12.5 million also at Paradigm’s discretion. Borrowings under the credit agreement bear interest at the rate of 13.0% per annum, payable quarterly in arrears. Principal repayment will commence on the eleventh interest payment date, September 30, 2016. The principal amount outstanding at commencement of repayment will be repaid in equal installments until final maturity of the loans. The loans will mature on February 14, 2019, or, if Paradigm has achieved the first milestone and the additional loan amount is provided to Paradigm, the loans will mature on August 14, 2019. Paradigm may elect to prepay the loans at any time, subject to a prepayment penalty that decreases over the life of the loans. The obligations under the credit agreement are secured by a pledge of substantially all of the assets of Paradigm and its domestic subsidiaries and, initially, certain assets of Paradigm’s German subsidiaries.

Subsequent Events

February 2018 Notes

On February 6, 2014, the Company agreed to sell $260.87 million aggregate principal amount of its February 2018 Notes in an underwritten public offering. The conversion rate of the February 2018 Notes will initially be 109.1048 shares of common stock per $1,000 principal amount of the February 2018 Notes equivalent to an initial conversion price of approximately $9.17 per share of common stock. The Company granted the underwriters an option to purchase up to an additional $39.13 million aggregate principal amount of the February 2018 Notes solely to cover overallotments (or $300 million principal amount in the aggregate). The conversion rate, subject to increase under certain circumstances, will not be increased in respect of regular quarterly cash dividends paid by us that do not exceed $0.15 per share.

On February 12, 2014, we issued $300 million aggregate principal amount of February 2018 Notes, which included $39.13 million aggregate principal amount of February 2018 Notes issued pursuant to the exercise of the underwriters’ overallotment option to purchase additional February 2018 Notes.

In connection with the offering of the February 2018 Notes, the Company has entered into privately negotiated convertible note hedge transactions with RBC Capital Markets and Wells Fargo Securities. The convertible note hedge transactions will cover, subject to customary anti-dilution adjustments, the number of shares of the Company’s common stock that will initially

underlie the February 2018 Notes, and are intended to reduce the dilutive impact of the conversion feature of the February 2018 Notes on the Company’s outstanding shares of common stock. The Company has also entered into privately negotiated warrant transactions with the hedge counterparties relating to the same number of shares of the Company’s common stock. The warrant transactions could separately have a dilutive effect to the extent that the market price per share of the Company’s common stock exceeds the applicable strike price of the warrants on any expiration date of the warrants.

Series 2012 Notes Exchange

On February 6, 2014, the Company entered into exchange and purchase agreements with certain holders of approximately $131.7 million aggregate principal amount of outstanding Series 2012 Notes. The exchange agreements provide for the issuance, by the Company, of shares of common stock and a cash payment for the Series 2012 Notes being exchanged, and the purchase agreement provides for a cash payment for the Series 2012 Notes being repurchased. The Company issued a total of approximately 20.3 million shares of its common stock and paid an aggregate cash payment of approximately $34.2 million pursuant to the exchange and purchase agreements.

Paradigm Spine

On February 14, 2014, the Company entered into a credit agreement with Paradigm Spine, LLC, under which it made available to Paradigm up to $75 million to be used by Paradigm to refinance its existing credit facility and expand its domestic commercial operations. A portion of the amount available under the agreement in an aggregate principal amount equal to $50 million, net of fees, was funded at the close of the transaction. In the event that certain specified sales and other milestones occur before December 31, 2014, the Company will fund Paradigm between an additional $6.25 million and $12.5 million, at Paradigm’s discretion. In the event that additional specified sales and other milestones occur before June 30, 2015, the Company will fund up to an additional $12.5 million also at Paradigm’s discretion. Borrowings under the credit agreement bear interest at the rate of 13.0% per annum, payable quarterly in arrears.

Principal repayment will commence on the eleventh interest payment date, September 30, 2016. The principal amount outstanding at commencement of repayment will be repaid in equal installments until final maturity of the loans. The loans will mature on February 14, 2019, or, if Paradigm has achieved the first milestone and the additional loan amount is provided to Paradigm, the loans will mature on August 14, 2019. Paradigm may elect to prepay the loans at any time, subject to a prepayment penalty that decreases over the life of the loans. The obligations under the credit agreement are secured by a pledge of substantially all of the assets of Paradigm and its domestic subsidiaries and, initially, certain assets of Paradigm’s German subsidiaries.