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Leasing - Supplemental Lease Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Supplemental lease information [Line Items]    
Operating cash flows from finance leases $ 0.3 $ 0.3
Operating cash flows from operating leases 35.1 29.0
Financing cash flows from finance leases $ 3.0 $ 1.0
Weighted-average remaining lease term - finance leases 15 years 9 months 18 days 2 years 9 months 18 days
Weighted-average remaining lease term - operating leases 8 years 8 months 12 days 9 years 2 months 12 days
Weighted-average discount rate - finance leases 4.20% 5.10%
Weighted-average discount rate - operating leases 5.70% 6.10%