v2.3.0.15
Cash Convertible Senior Notes and Related Transactions (Tables)
9 Months Ended
Sep. 30, 2011
Cash Convertible Senior Notes and Related Transactions [Abstract] 
Principal amount, carrying amount, and interest expense of the notes
The following tables provide additional information regarding the Notes:
 
September 30, 2011
 
December 31, 2010
Principal amount
$
175.0

 
$
175.0

Less: unamortized issuance discount
(28.7
)
 
(33.6
)
Carrying amount, net of discount
$
146.3

 
$
141.4


 
Quarter Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2011
 
2010
 
2011
 
2010
Contractual coupon interest
$
2.0

 
$
1.9

 
$
5.9

 
$
3.9

Amortization of discount and deferred financing costs
2.0

 
1.8

 
5.8

 
3.6

Total interest expense1
$
4.0

 
$
3.7

 
$
11.7

 
$
7.5

______________________
1 
A portion of the interest relating to the Notes is capitalized as Construction in progress.
See “Other” in Note 12 for information relating to the estimated fair value of the Notes.