Quarterly report pursuant to Section 13 or 15(d)

Contingencies (Details)

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Contingencies (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
lawsuit
Feb. 04, 2015
lawsuit
Contingencies    
Number of lawsuits 1ar_NumberOfLawsuits 2ar_NumberOfLawsuits
Additional accounts receivable $ 14.3ar_AdditionalAccountsReceivable