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Federal Funds Purchased and Securities Sold under Agreements to Repurchase - Summary (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Federal Funds Purchased and Securities Sold under Agreements to Repurchase    
Federal funds purchased $ 0 $ 0
Repurchase agreements 27,443 45,154
Total $ 27,443 $ 45,154