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Derivative Instruments and Hedging Activities (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Agreement
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Agreement
Interest rate derivatives - Included Component [Abstract]      
Amount of (loss) recognized in other comprehensive income $ (255) $ (170)  
Amount of loss (gain) reclassified from AOCI into interest expense 10 (799)  
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member]      
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]      
Fair value adjustment included in other assets 0   $ 4
Fair value adjustment included in other liabilities 295   45
Notional amount 25,000   $ 50,000
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]      
Interest rate derivatives - Included Component [Abstract]      
Amount of (loss) recognized in other comprehensive income (255) (170)  
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest (Income) Expense [Member]      
Interest rate derivatives - Included Component [Abstract]      
Amount of loss (gain) reclassified from AOCI into interest expense 10 (799)  
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Swaps [Member]      
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]      
Amount to be reclassified from AOCI as a reduction to interest expense during next twelve months 288    
Derivatives Not Designated as Hedging Instruments [Member] | Other Income [Member]      
Gain or loss recognized in income on derivatives not designating as a hedging relationship [Abstract]      
Decrease (Increase) in other income $ 143 $ (87)  
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member]      
Interest rate derivatives [Abstract]      
Number of risk participation agreements held | Agreement 16   15
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]      
Fair value adjustment included in other assets and other liabilities $ 118,576   $ 41,650
Notional amount 2,121,606   963,209
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member]      
Interest rate derivatives [Abstract]      
Fair value of derivative asset 387   112
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member]      
Interest rate derivatives [Abstract]      
Fair value of derivative liability 173   82
Derivatives Not Designated as Hedging Instruments [Member] | Risk Participation Agreements [Member]      
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract]      
Notional amount $ 108,701   $ 97,614