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Leases - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Undiscounted contract amount operating leases not yet commenced $ 3.6  
PB | Branches closure    
Leases    
Asset impairment charges   $ 15.9
Minimum    
Leases    
Remaining lease term of contract 1 month 6 days  
Operating lease contract not yet commenced 10 years  
Maximum    
Leases    
Remaining lease term of contract 32 years 9 months 18 days  
Lessee remaining lease renewal term 20 years  
Operating lease contract not yet commenced 20 years