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Investment in Short-Term Receivables	12 Months Ended
Investment in Short-Term Receivables	Dec. 31, 2013
Receivables [Abstract]
Investment in Short-Term Receivables	4. Investment in Short-Term Receivables The Company invests in short-term trade receivables purchased on an exchange, which are covered by a repurchase agreement from the seller of the receivables, if not paid within a specified period. Since the receivables are traded on an exchange, the Company has the ability to resell the receivables on the exchange. As of December 31, 2013 and 2012, the Company had $246.8 million and $81.0 million, respectively in purchased receivables.