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Derivatives and Hedging Activities - Additional Information (Details)
3 Months Ended
Dec. 31, 2019
Minimum  
Derivative [Line Items]  
Derivative, maturities 1 year
Maximum  
Derivative [Line Items]  
Derivative, maturities 7 years
Weighted average  
Derivative [Line Items]  
Derivative, maturities 2 years 4 months 24 days