v3.26.1
Securities (Tables)
 12 Months Ended
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Comparison of Securities by Type
A summary comparison of securities by type at December 31, 2025 and 2024 is shown below.

December 31, 2025December 31, 2024
(in thousands)Amortized CostGross
Unrealized Gains		Gross
Unrealized Losses		Fair ValueAmortized CostGross
Unrealized Gains		Gross
Unrealized Losses		Fair Value
Available for sale:        
U.S. Treasury$98,123 $26 $— $98,149 $147,840 $33 $(93)$147,780 
Corporate debt securities6,500 — (51)6,449 12,250 — (668)11,582 
Municipal bonds21,211 218 (373)21,056 21,736 220 (339)21,617 
Collateralized mortgage obligations301,685 1,232 (336)302,581 32,065 — (446)31,619 
Mortgage-backed securities246,620 2,085 (348)248,357 70,430 — (1,931)68,499 
Total available for sale securities$674,139 $3,561 $(1,108)$676,592 $284,321 $253 $(3,477)$281,097 
Held to maturity:        
U.S. Government Agencies$267,626 $— $(51,627)$215,999 $266,761 $— $(64,671)$202,090 
Corporate debt securities55,199 8 (3,112)52,095 55,011 — (5,643)49,368 
Total held to maturity securities$322,825 $8 $(54,739)$268,094 $321,772 $— $(70,314)$251,458 
Schedule of Investments Classified by Contractual Maturity Date For this reason they are presented separately in the maturity table below.
 December 31, 2025
(in thousands)Amortized CostFair Value
Available for sale:  
Due in one year or less$105,356 $105,455 
Due after one year through five years8,904 8,911 
Due after five years through 10 years9,369 9,266 
Over 10 years2,205 2,022 
Subtotal125,834 125,654 
Collateralized mortgage obligations301,685 302,581 
Mortgage-backed Securities246,620 248,357 
Total available for sale securities$674,139 $676,592 
Held to maturity:
Due in one year or less$— $— 
Due after one year through five years48,011 44,728 
Due after five years through 10 years114,250 101,041 
Over 10 years160,564 122,325 
Total held to maturity securities$322,825 $268,094 
Schedule of Unrealized Loss on Investments
The following is a summary of the fair value of securities with gross unrealized losses and an aging of those gross unrealized losses at December 31, 2025.

 December 31, 2025
 Less Than 12 Months12 Months or MoreTotal
(in thousands)Number
of Securities		Fair ValueGross
Unrealized Losses		Number
of Securities		Fair ValueGross
Unrealized Losses		Number
of Securities		Fair ValueGross
Unrealized Losses
Available for sale:         
U.S. Treasuries2 $19,646 $— — $— $— 2 $19,646 $— 
Corporate debt securities2 1,989 (11)4 3,460 (40)6 5,449 (51)
Municipal bonds— — — 28 6,261 (373)28 6,261 (373)
Collateralized mortgage obligations31 137,608 (336)— — — 31 137,608 (336)
Mortgage-backed securities14 40,812 (130)10 27,421 (218)24 68,233 (348)
Total available for sale securities49 $200,055 $(477)42 $37,142 $(631)91 $237,197 $(1,108)
Held to maturity:
U.S. Government Agencies— $— — 29 $215,999 $(51,627)29 $215,999 $(51,627)
Corporate debt securities2 1,805 (136)54 49,965 (2,976)56 51,770 (3,112)
Total held to maturity securities2 $1,805 $(136)83 $265,964 $(54,603)85 $267,769 $(54,739)

The following is a summary of the fair value of securities with gross unrealized losses and an aging of those gross unrealized losses at December 31, 2024.

 December 31, 2024
 Less Than 12 Months12 Months or MoreTotal
(in thousands)Number
of Securities		Fair ValueGross
Unrealized Losses		Number
of Securities		Fair ValueGross
Unrealized Losses		Number
of Securities		Fair ValueGross
Unrealized Losses
Available for sale:         
U.S. Treasuries2 $48,615 $(93)— $— $— 2 $48,615 $(93)
Corporate debt securities2 1,965 (35)12 9,617 (633)14 11,582 (668)
Municipal bonds2 505 (4)34 5,406 (335)36 5,911 (339)
Collateralized mortgage obligations8 31,619 (446)— — — 8 31,619 (446)
Mortgage-backed securities15 65,089 (1,721)6 3,410 (210)21 68,499 (1,931)
Total available for sale securities29 $147,793 $(2,299)52 $18,433 $(1,178)81 $166,226 $(3,477)
Held to maturity:
U.S. Government Agencies— $— — 29 $202,090 $(64,671)29 $202,090 $(64,671)
Corporate debt securities1 322 (3)56 49,046 (5,640)57 49,368 (5,643)
Total held to maturity securities1 $322 $(3)85 $251,136 $(70,311)86 $251,458 $(70,314)
Schedule of Exposure to Investment Securities Issuers that Exceeded 10% of Shareholder's Equity
At December 31, 2025, First Guaranty's exposure to investment securities issuers that exceeded 10% of shareholders' equity was as follows:

 December 31, 2025
(in thousands)Amortized CostFair Value
U.S. Government Treasuries (U.S.)$98,123 $98,149 
Federal Home Loan Bank (FHLB)32,407 27,533 
Federal Home Loan Mortgage Corporation (Freddie Mac-FHLMC)101,861 77,720 
Federal Farm Credit Bank (FFCB)139,715 117,047 
Government National Mortgage Association (Ginnie Mae-GNMA)238,018 239,772 
Total$610,124 $560,221