Goodwill and Other Intangible Assets	9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill and intangible assets deemed to have indefinite lives are no longer amortized but are subject to impairment testing. The Company is required to conduct testing of goodwill impairment periodically (at least annually) and upon the occurrence of certain triggering events, which are events or circumstances that make it more likely than not that the fair value of its goodwill is below its carrying amount. The Company performed a quantitative impairment test as of September 30, 2025, using a combination of market and income approaches, including the guideline public company method, guideline precedent transaction method, and discounted cash flow analysis, which was triggered by the Company's stock price trading below book value and the recent increase in credit provisions. Based on the results of the test, the Company concluded the goodwill of $12.9 million was impaired; therefore, a one-time non-cash impairment charge was recorded. Other intangible assets continue to be amortized over their useful lives. Loan servicing assets totaled $0.3 million at September 30, 2025 and $0.4 million at December 31, 2024. Other intangible assets recorded include core deposit intangibles, which are subject to amortization. The weighted-average amortization period remaining for First Guaranty's core deposit intangibles is 3.5 years at September 30, 2025. The core deposits intangible reflect the value of deposit relationships, including the beneficial rates, which arose from acquisitions.

Goodwill and intangible assets deemed to have indefinite lives are no longer amortized but are subject to impairment testing. The Company is required to conduct testing of goodwill impairment periodically (at least annually) and upon the occurrence of certain triggering events, which are events or circumstances that make it more likely than not that the fair value of its goodwill is below its carrying amount. The Company performed a quantitative impairment test as of September 30, 2025, using a combination of market and income approaches, including the guideline public company method, guideline precedent transaction method, and discounted cash flow analysis, which was triggered by the Company's stock price trading below book value and the recent increase in credit provisions. Based on the results of the test, the Company concluded the goodwill of $12.9 million was impaired; therefore, a one-time non-cash impairment charge was recorded.

Other intangible assets continue to be amortized over their useful lives. Loan servicing assets totaled $0.3 million at September 30, 2025 and $0.4 million at December 31, 2024. Other intangible assets recorded include core deposit intangibles, which are subject to amortization. The weighted-average amortization period remaining for First Guaranty's core deposit intangibles is 3.5 years at September 30, 2025. The core deposits intangible reflect the value of deposit relationships, including the beneficial rates, which arose from acquisitions.