Accounts Receivable

6 Months Ended

Jun. 30, 2013

Accounts Receivable

2. Accounts Receivable

Accounts receivable are net of allowances for doubtful accounts of $35.9 million, $19.5 million, and $33.5 million as of June 30, 2013, June 30, 2012, and December 31, 2012, respectively.