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Accounts Receivable	3 Months Ended
Accounts Receivable	Mar. 31, 2016
Receivables [Abstract]
Accounts Receivable	Accounts Receivable Accounts receivable are net of allowances for doubtful accounts of $31.9 million, $28.1 million, and $24.4 million as of March 31, 2016, March 31, 2015, and December 31, 2015, respectively.