v3.26.1
Investment in Securities (Tables)
 3 Months Ended
Mar. 31, 2026
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:
March 31, 2026
(In thousands)Amortized
Cost		 Gross
Unrealized
Gains		 Gross
Unrealized
Losses		 Fair
Value
State and political subdivisions $236,398 $1,906 $(11,590)$226,714 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises535,493 1,041 (28,550)507,984 
Corporate bonds 30,831 — (2,180)28,651 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises22,314 — (320)21,994 
Total $825,036 $2,947 $(42,640)$785,343 
December 31, 2025
(In thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
State and political subdivisions $247,716 $3,228 $(10,733)$240,211 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises503,599 2,144 (27,047)478,696 
Corporate bonds30,895 — (1,999)28,896 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises23,294 — (325)22,969 
Total $805,504 $5,372 $(40,104)$770,772 
Schedule of Unrealized Loss on Investments
The fair values of investment securities with unrealized losses are as follows:
March 31, 2026
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 $14,601 $94 $111,530 $11,496 $126,131 $11,590 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises234,203 2,990 143,021 25,560 377,224 28,550 
Corporate bonds— — 28,651 2,180 28,651 2,180 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises— — 21,994 320 21,994 320 
Total $248,804 $3,084 $305,196 $39,556 $554,000 $42,640 
December 31, 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 $— $— $139,379 $10,733 $139,379 $10,733 
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises148,111 1,733 155,353 25,314 303,464 27,047 
Corporate bonds— — 28,896 1,999 28,896 1,999 
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises— — 22,969 325 22,969 325 
Total $148,111 $1,733 $346,597 $38,371 $494,708 $40,104