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Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2014
Summary of Carrying Values and Estimated Fair Values of Senior Convertible Notes and Facility Financing Obligation

The following is a summary of the carrying values and estimated fair values of the Company’s 5.75% Senior Convertible Notes due 2015 (the “2015 notes”) and the 2019 notes (in millions).

 

     March 31, 2014      December 31, 2013  
     Carrying
value
     Estimated
fair value
     Carrying
value
     Estimated
fair value
 

2015 notes

   $ 98.7       $ 95.1       $ 98.4       $ 102.2   

2019 notes

   $ 25.9       $ 25.7       $ 102.3       $ 107.0