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Borrowings - Additional Information (Details) - Peoples Bank - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Short-term Debt    
Maximum borrowing capacity $ 970,621 $ 896,130
Outstanding amount in borrowings 2,182 2,711
Amount of credit facility used to issue standby letters of credit to collateralize public fund deposits $ 297,535 $ 373,035