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Cash and Due from Banks	12 Months Ended
Cash and Due from Banks	Dec. 31, 2023
Cash and Cash Equivalents [Abstract]
Cash and Due from Banks	Cash and Due from Banks Certain reserves are required to be maintained at the Federal Reserve Bank. There was no reserve requirement as of December 31, 2023 and 2022. At December 31, 2023 First Guaranty had three accounts at correspondent banks, excluding the Federal Reserve Bank, that exceeded the FDIC insurable limit of $250,000. These accounts were over the insurable limit by $1.2 million. At December 31, 2022 First Guaranty had three accounts at correspondent banks, excluding the Federal Reserve Bank, that exceeded the FDIC insurable limit of $250,000. These accounts were over the insurable limit by $4.6 million.