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Borrowings - Capital Leases (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Capital Leases, Maturity Date Range, Start Oct. 20, 2015  
Capital Leases, Maturity Date Range, End Jul. 20, 2018  
Capital Lease Obligations, Current $ 0.2 $ 0.3
Capital Lease Obligations, Noncurrent $ 0.1 $ 0.1