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Leases - Additional Information (Details)
$ in Millions
Sep. 30, 2019
USD ($)
Sublease Rental Income  
2019 $ 1.2
2020 4.9
2021 4.5
2022 0.7
2023 0.6
Thereafter $ 0.9
Minimum  
Lessee, Lease, Description [Line Items]  
Renewal term 6 months
Maximum  
Lessee, Lease, Description [Line Items]  
Renewal term 9 years