Trade Accounts Receivable

3 Months Ended

Mar. 31, 2012

Trade Accounts Receivable

Trade Accounts Receivable

(3) Trade Accounts Receivable

        Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company reviews the need for an allowance for doubtful accounts on a quarterly basis. At March 31, 2012 and December 31, 2011, the allowance for doubtful accounts was $2.5 million and zero, respectively.