As of December 31, 2011 and December 31, 2010, no revolving loans were drawn under the credit facility and the principal amount of letter of credit obligations totaled $23.5 million and $64.7 million, respectively, thereby reducing available borrowing capacity to $1,726.5 million and $535.3 million, respectively.
(2)
As of December 31, 2011 and December 31, 2010, the $400 million 5.90 percent senior notes were recorded at a par value of $400 million less unamortized discounts of $2.0 million and $2.2 million, respectively, based on an imputed interest rate of 5.98 percent.
(3)
As of December 31, 2011 and December 31, 2010, the $800 million and $500 million 6.25 percent senior notes were recorded at par values of $800 million and $500 million, respectively, less unamortized discounts of $9.9 million and $8.7 million, respectively, based on an imputed interest rate of 6.38 percent.
(4)
As of December 31, 2011 and December 31, 2010, the $500 million 4.80 percent senior notes were recorded at a par value of $500 million less unamortized discounts of $0.9 million and $1.0 million, respectively, based on an imputed interest rate of 4.83 percent.
(5)
As of December 31, 2011, the $700 million 4.875 percent senior notes were recorded at a par value of $700 million less unamortized discounts of $0.7 million, based on an imputed interest rate of 4.89 percent.
(6)
As of December 31, 2011, $278.0 million had been paid down on the original $1.25 billion term loan and of the remaining term loan $74.8 million was classified as Current portion of term loan. The current classification is based upon the principal payment terms of the arrangement requiring principal payments on each three-month anniversary following the funding of the term loan.
Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.