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Cash Requirement
 3 Months Ended
Mar. 31, 2021
Banking and Thrift, Other Disclosures [Abstract]  
Cash Requirement Cash Restriction The Bank had restricted cash included in interest earning deposits on the Condensed Consolidated Statements of Financial Condition of $10.5 million and $25.9 million as of March 31, 2021 and December 31, 2020, respectively, relating to collateral required on interest rate swaps from third-parties as discussed in Note (10) Derivative Financial Instruments. The Bank does not have a collateral requirement with customers.