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Derivative and Hedging Activities - Information Regarding Derivative Financial Instruments (Details) - Designated as Hedging Instrument - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Amount of designated hedged items $ 2,000,000 $ 2,000,000
Fair Value Hedging    
Derivative [Line Items]    
Amount of designated hedged items 2,000,000 2,000,000
Fair Value Hedging | Other Assets    
Derivative [Line Items]    
Derivative Asset 0  
Fair Value Hedging | Other Liabilities    
Derivative [Line Items]    
Derivative Liabilities 0  
Interest Rate Swap    
Derivative [Line Items]    
Amount of designated hedged items 2,000,000 2,000,000
Interest Rate Swap | Fair Value Hedging    
Derivative [Line Items]    
Amount of designated hedged items 2,000,000 $ 2,000,000
Interest Rate Swap | Fair Value Hedging | Other Assets    
Derivative [Line Items]    
Derivative Asset 0  
Interest Rate Swap | Fair Value Hedging | Other Liabilities    
Derivative [Line Items]    
Derivative Liabilities $ 0