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Accounts Receivable
3 Months Ended
Mar. 31, 2014
Accounts Receivable

2. Accounts Receivable

Accounts receivable are net of allowances for doubtful accounts of $19.5 million, $35.4 million, and $20.4 million as of March 31, 2014, March 31, 2013, and December 31, 2013, respectively.