Litigation	12 Months Ended
Dec. 31, 2023
Loss Contingency [Abstract]
Litigation	Litigation First Guaranty is subject to various legal proceedings in the normal course of its business. First Guaranty assesses its liabilities and contingencies in connection with outstanding legal proceedings. Where it is probable that First Guaranty will incur a loss and the amount of the loss can be reasonably estimated, First Guaranty records a liability in its consolidated financial statements. First Guaranty does not record a loss if the loss is not probable or the amount of the loss is not estimable. First Guaranty Bank is a defendant in a lawsuit alleging fault for a loss of funds by a customer related to fraud by a third party with a possible loss range of $0.0 million to $1.5 million. The Bank denies the allegations and intends to vigorously defend against this lawsuit, which is in early stages and no trial date has been set. No accrued liability has been recorded related to this lawsuit. First Guaranty settled a case in the third quarter of 2021 for $1.1 million. A receivable for $0.9 million has been recorded for recovery by a claim against First Guaranty's insurer. In the opinion of management, neither First Guaranty nor First Guaranty Bank is currently involved in such legal proceedings, either individually or in the aggregate, that the resolution is expected to have a material adverse effect on First Guaranty’s consolidated results of operations, financial condition, or cash flows. However, one or more unfavorable outcomes in these ordinary claims or litigation against First Guaranty or First Guaranty Bank could have a material adverse effect for the period in which they are resolved. In addition, regardless of their merits or ultimate outcomes, such matters are costly, divert management’s attention, and may materially and adversely affect the reputation of First Guaranty and First Guaranty Bank, even if resolved favorably.

First Guaranty is subject to various legal proceedings in the normal course of its business. First Guaranty assesses its liabilities and contingencies in connection with outstanding legal proceedings. Where it is probable that First Guaranty will incur a loss and the amount of the loss can be reasonably estimated, First Guaranty records a liability in its consolidated financial statements. First Guaranty does not record a loss if the loss is not probable or the amount of the loss is not estimable. First Guaranty Bank is a defendant in a lawsuit alleging fault for a loss of funds by a customer related to fraud by a third party with a possible loss range of $0.0 million to $1.5 million. The Bank denies the allegations and intends to vigorously defend against this lawsuit, which is in early stages and no trial date has been set. No accrued liability has been recorded related to this lawsuit. First Guaranty settled a case in the third quarter of 2021 for $1.1 million. A receivable for $0.9 million has been recorded for recovery by a claim against First Guaranty's insurer. In the opinion of management, neither First Guaranty nor First Guaranty Bank is currently involved in such legal proceedings, either individually or in the aggregate, that the resolution is expected to have a material adverse effect on First Guaranty’s consolidated results of operations, financial condition, or cash flows. However, one or more unfavorable outcomes in these ordinary claims or litigation against First Guaranty or First Guaranty Bank could have a material adverse effect for the period in which they are resolved. In addition, regardless of their merits or ultimate outcomes, such matters are costly, divert management’s attention, and may materially and adversely affect the reputation of First Guaranty and First Guaranty Bank, even if resolved favorably.