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Derivative Financial Instruments - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
contract
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
contract
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Derivative [Line Items]          
Maximum length of time hedged     10 years    
Interest rate cash flow reclassified into earnings $ 400,000 $ 800,000 $ 1,000,000 $ 1,600,000  
AOCI reclassified as reduction in interest expense, during next 12 months 1,200,000   1,200,000    
Cash pledged to Peoples from counterparties 10,000,000   10,000,000   $ 0
Investment securities, counterparties pledged 3,200,000   3,200,000   0
Interest Rate Swap | Asset Pledged as Collateral          
Derivative [Line Items]          
Investment securities 0   0   28,100,000
Interest Rate Swap          
Derivative [Line Items]          
Restricted cash 0   0   0
Brokered Demand Deposits          
Derivative [Line Items]          
Notional amount 85,000,000   85,000,000    
Federal Home Loan Bank 90-day Advances          
Derivative [Line Items]          
Notional amount $ 40,000,000   $ 40,000,000    
Interest Rate Swap          
Derivative [Line Items]          
Number of derivative instruments | contract 13   13    
Notional amount $ 125,000,000   $ 125,000,000   $ 125,000,000