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Leases - Additional Information (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Lessee Lease Description [Line Items]  
Operating lease expiration term 2043
Future Lease Agreements  
Lessee Lease Description [Line Items]  
Operating lease expected to commence undiscounted lease liabilities in 2020 $ 5.1
Operating lease expected to commence undiscounted lease liabilities in 2021 $ 0.6