v3.26.1
Securities (Tables)
 6 Months Ended
Jun. 30, 2026
Investments, Debt and Equity Securities [Abstract]  
Schedule of Comparison of Securities by Type
A summary comparison of securities by type at June 30, 2026 and December 31, 2025 is shown below. 

June 30, 2026December 31, 2025
(in thousands)Amortized CostGross
Unrealized Gains		Gross
Unrealized Losses		Fair ValueAmortized CostGross Unrealized GainsGross
Unrealized Losses		Fair Value
Available for sale:
U.S. Treasuries$49,539 $— $(32)$49,507 $98,123 $26 $— $98,149 
Corporate debt securities5,000 — (87)4,913 6,500 — (51)6,449 
Municipal bonds16,005 64 (890)15,179 21,211 218 (373)21,056 
Collateralized mortgage obligations568,188 104 (7,888)560,404 301,685 1,232 (336)302,581 
Mortgage-backed securities263,130 279 (2,654)260,755 246,620 2,085 (348)248,357 
Total available for sale securities$901,862 $447 $(11,551)$890,758 $674,139 $3,561 $(1,108)$676,592 
Held to maturity:
U.S. Government Agencies$268,059 $— $(54,498)$213,561 $267,626 $— $(51,627)$215,999 
Corporate debt securities55,294 4 (3,565)51,733 55,199 8 (3,112)52,095 
Total held to maturity securities$323,353 $4 $(58,063)$265,294 $322,825 $8 $(54,739)$268,094 
Schedule of Investments Classified by Contractual Maturity Date
The scheduled maturities of securities at June 30, 2026, by contractual maturity, are shown below. Actual maturities may differ from contractual maturities due to calls or prepayments. Mortgage-backed securities are not due at a single maturity because of amortization and potential prepayment of the underlying mortgages. For this reason, they are presented separately in the maturity table below:
 
At June 30, 2026
(in thousands)Amortized CostFair Value
Available for sale:
Due in one year or less$50,748 $50,710 
Due after one year through five years8,355 8,189 
Due after five years through 10 years8,653 8,023 
Over 10 years2,788 2,677 
Subtotal70,544 69,599 
Collateralized mortgage obligations568,188 560,404 
Mortgage-backed securities263,130 260,755 
Total available for sale securities$901,862 $890,758 
Held to maturity:
Due in one year or less$— $— 
Due after one year through five years67,350 62,186 
Due after five years through 10 years140,237 120,798 
Over 10 years115,766 82,310 
Total held to maturity securities$323,353 $265,294 
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 June 30, 2026.

At June 30, 2026
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. Treasuries4 $49,507 $(32)— $— $— 4 $49,507 $(32)
Corporate debt securities2 1,983 (17)3 2,930 (70)5 4,913 (87)
Municipal bonds41 7,149 (211)25 5,720 (679)66 12,869 (890)
Collateralized mortgage obligations109 519,960 (7,888)— — — 109 519,960 (7,888)
Mortgage-backed securities56 176,580 (2,286)6 11,690 (368)62 188,270 (2,654)
Total available for sale securities212 $755,179 $(10,434)34 $20,340 $(1,117)246 $775,519 $(11,551)
Held to maturity:
U.S. Government Agencies— $— $— 29 $213,561 $(54,498)29 $213,561 $(54,498)
Corporate debt securities2 1,798 (148)54 49,617 (3,417)56 51,415 (3,565)
Total held to maturity securities2 $1,798 $(148)83 $263,178 $(57,915)85 $264,976 $(58,063)

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. 

At 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)
Schedule of Exposure to Investment Securities Issuers that Exceeded 10% of Shareholders' Equity
At June 30, 2026, First Guaranty's exposure to bond issuers that exceeded 10% of shareholders' equity is below: 

At June 30, 2026
(in thousands)Amortized CostFair Value
U.S. Government Treasuries (U.S.)$49,539 $49,507 
Federal Home Loan Bank (FHLB)32,460 27,084 
Federal Home Loan Mortgage Corporation (Freddie Mac-FHLMC)101,917 76,433 
Federal Farm Credit Bank (FFCB)139,962 116,202 
Government National Mortgage Association (Ginnie Mae-GNMA)822,829 812,776 
Total$1,146,707 $1,082,002