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Derivative Instruments and Hedge Activities - Summary of Company's Interest Rate Derivative and Offsetting Positions (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]    
Gross amounts recognized $ 7,960 $ 10,740
Net amount presented in the Consolidated Statements of Financial Condition 7,960 10,740
Gross amounts not offset in the Consolidated Statements of Financial Condition    
Offsetting derivative positions (1) (2,823)
Collateral posted (7,959) (7,917)
Gross amounts recognized 8,519 4,243
Net amount presented in the Consolidated Statements of Financial Condition 8,519 4,243
Gross amounts not offset in the Consolidated Statements of Financial Condition    
Offsetting derivative positions (1) (2,823)
Collateral posted $ (8,518) (1,317)
Net credit exposure   $ 103