v3.26.1
Investment Securities (Tables)
 6 Months Ended
Jun. 30, 2026
Securities Financing Transactions Disclosures [Abstract]  
Schedule of Unrealized Gain (Loss) on Investments
The following tables set forth the amortized cost and estimated fair value of investment securities for the periods presented:
June 30, 2026
(In thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Estimated
Fair Value
Available-for-sale
U.S. Treasury and U.S. government agencies$17,294 $— $460 $16,834 
Mortgage-backed U.S. government agencies441,388 1,800 13,190 429,998 
State and political subdivision obligations4,287 — 497 3,790 
Corporate debt securities50,647 351 1,847 49,151 
Total available-for-sale debt securities$513,616 $2,151 $15,994 $499,773 
Held-to-maturity
U.S. Treasury and U.S. government agencies$223,550 $— $17,760 $205,790 
Mortgage-backed U.S. government agencies29,916 2 3,741 26,177 
State and political subdivision obligations106,950 3 4,022 102,931 
Corporate debt securities12,450 — 1,042 11,408 
Total held-to-maturity debt securities372,866 5 26,565 346,306 
Total$886,482 $2,156 $42,559 $846,079 
December 31, 2025
(In thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Estimated
Fair Value
Available-for-sale
U.S. Treasury and U.S. government agencies$19,446 $— $380 $19,066 
Mortgage-backed U.S. government agencies361,109 3,788 11,500 353,397 
State and political subdivision obligations4,319 — 485 3,834 
Corporate debt securities41,638 249 1,870 40,017 
Total available-for-sale debt securities$426,512 $4,037 $14,235 $416,314 
Held-to-maturity
U.S. Treasury and U.S. government agencies$231,980 $— $16,566 $215,414 
Mortgage-backed U.S. government agencies32,418 4 3,747 28,675 
State and political subdivision obligations67,441 12 4,043 63,410 
Corporate debt securities15,446 — 1,243 14,203 
Total held-to-maturity debt securities347,285 16 25,599 321,702 
Total$773,797 $4,053 $39,834 $738,016 
Schedule of Fair Value and Unrealized Loss on Debt Security Investments in a Continuous Unrealized Loss Position
The following tables present gross unrealized losses and fair value of debt investment securities aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position for the periods presented:
(Dollars in thousands)Less Than 12 Months12 Months or MoreTotal
June 30, 2026Number
of
Securities		Estimated
Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Estimated
Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Estimated
Fair
Value		Gross
Unrealized
Losses
Available-for-sale debt securities:
U.S. Treasury and U.S. government agencies—$— $— 9$16,834 $460 9$16,834 $460 
Mortgage-backed U.S. government agencies56337,430 1,335 8392,568 11,855 139429,998 13,190 
State and political subdivision obligations—— — 83,790 497 83,790 497 
Corporate debt securities1129,152 96 1219,999 1,751 2349,151 1,847 
Total available-for-sale debt securities67$366,582 $1,431 112$133,191 $14,563 179$499,773 $15,994 
Held-to-maturity debt securities:
U.S. Treasury and U.S. government agencies3$5,735 $96 128$200,055 $17,664 131$205,790 $17,760 
Mortgage-backed U.S. government agencies5885 7 5825,292 3,734 6326,177 3,741 
State and political subdivision obligations4052,194 25 11850,737 3,997 158102,931 4,022 
Corporate debt securities22,500 — 78,908 1,042 911,408 1,042 
Total held-to-maturity debt securities5061,314 128 311284,992 26,437 361346,306 26,565 
Total117$427,896 $1,559 423$418,183 $41,000 540$846,079 $42,559 
(Dollars in thousands)Less Than 12 Months12 Months or MoreTotal
December 31, 2025Number
of
Securities		Estimated
Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Estimated
Fair
Value		Gross
Unrealized
Losses		Number
of
Securities		Estimated
Fair
Value		Gross
Unrealized
Losses
Available-for-sale securities:
U.S. Treasury and U.S. government agencies—$— $— 10$19,066 $380 10$19,066 $380 
Mortgage-backed U.S. government agencies27208,676 141 91144,721 11,359 118353,397 11,500 
State and political subdivision obligations124 — 83,810 485 93,834 485 
Corporate debt securities818,573 64 1421,444 1,806 2240,017 1,870 
Total available-for-sale securities36$227,273 $205 $123$189,041 $14,030 159$416,314 $14,235 
Held-to-maturity securities:
U.S. Treasury and U.S. government agencies—$— $— 137$215,414 $16,566 137$215,414 $16,566 
Mortgage-backed U.S. government agencies4423 — 6028,252 3,747 6428,675 3,747 
State and political subdivision obligations124,401 2 13959,009 4,041 15163,410 4,043 
Corporate debt securities33,368 128 910,835 1,115 1214,203 1,243 
Total held-to-maturity securities198,192 130 345313,510 25,469 364321,702 25,599 
Total55$235,465 $335 468$502,551 $39,499 523$738,016 $39,834 
Schedule of Investments Classified by Contractual Maturity Date
The table below illustrates the contractual maturity of debt investment securities at amortized cost and estimated fair value. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay with or without call or prepayment penalties.
(In thousands)Available-for-saleHeld-to-maturity
June 30, 2026Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Due in 1 year or less$12,409 $12,242 $68,961 $68,762 
Due after 1 year but within 5 years11,397 11,297 170,758 159,585 
Due after 5 years but within 10 years47,578 45,558 94,729 84,353 
Due after 10 years844 678 8,502 7,429 
72,228 69,775 342,950 320,129 
Mortgage-backed securities441,388 429,998 29,916 26,177 
$513,616 $499,773 $372,866 $346,306