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Short-Term Borrowings and Long-Term Debt - Long-term debt (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Long Term Debt    
Long-term debt $ 5,023 $ 3,123
Federal Home Loan Bank of Pittsburgh | Mid-term Repo-fixed Maturing On 03/21/2022    
Long Term Debt    
Fixed interest rate (as a percent) 0.92%  
Long-term debt $ 1,900  
Federal Home Loan Bank of Pittsburgh | Mid-term Repo-fixed Maturing On 06/28/2021    
Long Term Debt    
Fixed interest rate (as a percent) 1.88%  
Long-term debt $ 3,123 3,123
Federal Home Loan Bank of Pittsburgh | Letters of credit    
Long Term Debt    
Proceeds from long term debt 157,000  
Maximum borrowing capacity $ 525,700 $ 507,300