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Leases Standard Adoption (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Jan. 01, 2019
Leases [Abstract]          
Retained earning adjustment for adoption of ASC 842         $ (0.5)
Capitalized initial lease costs   $ 3.0 $ 4.7 $ 6.2  
Payments excluded from lease consideration $ 1.1   $ 3.8 8.0  
Accounts Receivable, Allowance for Credit Loss       $ 2.9  
Changes in rental income allowance $ 3.1 $ 3.8