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Derivative Financial Instruments - Interest Rate Swaps Designated as Cash Flow Hedges (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]    
Fair value recorded in other liabilities   $ 300
Cash Flow Hedging | Interest rate swap    
Derivative [Line Items]    
Notional amount $ 70,000 $ 70,000
Weighted average fixed pay rates 1.80% 1.80%
Weighted average variable 3 month LIBOR receive rates 0.22% 1.90%
Weighted average maturity in years 2 years 10 months 6 days 3 years 10 months 9 days
Unrealized gains (losses), net of tax $ (2,184) $ (200)
Interest income (expense) on swap transactions (800)  
Unrealized gain (loss) to be reclassified from OCI to interest expense during next twelve months (300)  
Other liabilities | Cash Flow Hedging | Interest rate swap    
Derivative [Line Items]    
Fair value recorded in other liabilities $ 3,100