v3.25.3
Investment in Securities (Tables)
 9 Months Ended
Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investment Securities The amortized cost, gross unrealized gains, gross unrealized losses and fair value of investment securities are summarized as follows:
September 30, 2025
(In thousands)Amortized
Cost		 Gross
Unrealized
Gains		 Gross
Unrealized
Losses		 Fair
Value
State and political subdivisions $257,145 $1,802 $(11,838)$247,109 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises439,159 1,515 (27,864)412,810 
Corporate bonds 30,960 — (2,238)28,722 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises29,074 — (346)28,728 
Total $756,338 $3,317 $(42,286)$717,369 
December 31, 2024
(In thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
State and political subdivisions $188,933 $4 $(16,973)$171,964 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises267,359 11 (34,095)233,275 
Corporate bonds95,841 3 (8,058)87,786 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises35,575 — (579)34,996 
Total $587,708 $18 $(59,705)$528,021 
Schedule of Unrealized Loss on Investments
The fair values of investment securities with unrealized losses are as follows:
September 30, 2025
Less than 12 months12 months or moreTotal
(In thousands)Estimated
Fair Value		 Unrealized
Losses		 Estimated
Fair Value		Unrealized
Losses		 Estimated
Fair Value		 Unrealized
Losses
State and political subdivisions $2,814 $16 $148,209 $11,822 $151,023 $11,838 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises117,666 1,227 145,446 26,637 263,112 27,864 
Corporate bonds— — 28,723 2,238 28,723 2,238 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises— — 28,728 346 28,728 346 
Total $120,480 $1,243 $351,106 $41,043 $471,586 $42,286 

December 31, 2024
Less than 12 months12 months or moreTotal
(In thousands)Estimated
Fair Value		 Unrealized
Losses		 Estimated
Fair Value		Unrealized
Losses		 Estimated
Fair Value		 Unrealized
Losses
State and political subdivisions $4,082 $8 $163,893 $16,964 $167,975 $16,972 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises85,272 2,086 139,676 32,009 224,948 34,095 
Corporate bonds7,901 99 66,860 7,960 74,761 8,059 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises— — 30,575 579 30,575 579 
Total $97,255 $2,193 $401,004 $57,512 $498,259 $59,705