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Investment Securities (Tables)
 9 Months Ended
Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract]  
Gross Realized and Unrealized Gains (Losses) on Marketable Equity Securities The realized and unrealized gains (losses) recognized on marketable equity securities in other operating income in the Company's Consolidated Statements of Income were as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(In Thousands)2025202420252024
Unrealized gain (loss) on marketable equity securities
$80 $576 $108 $830 
   Total$80 $576 $108 $830 
Summary of Available-For-Sale Securities The following table summarizes the amortized cost, estimated fair value, and the Allowance for Credit Losses (“ACL”) of debt securities and the corresponding amounts of gross unrealized gains and losses of available-for-sale securities recognized in accumulated other comprehensive income (loss) and gross unrecognized gains and losses of held to maturity securities at the periods indicated:
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesFair Value
September 30, 2025    
Securities available for sale    
U.S. Treasury and government sponsored entities$388,946 $1,558 ($3,998)$— $386,506 
U.S. Agency mortgage-backed securities4,887 — — 4,887 
Corporate bonds5,005 — (89)— 4,916 
Collateralized loan obligations22,825 44 — — 22,869 
Total securities available for sale$421,663 $1,602 ($4,087)$— $419,178 
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesFair Value
December 31, 2024    
Securities available for sale    
U.S. Treasury and government sponsored entities$444,370 $294 ($11,733)$— $432,931 
Corporate bonds9,009 9 (223)— 8,795 
Collateralized loan obligations36,827 66 (2)— 36,891 
Total securities available for sale$490,206 $369 ($11,958)$— $478,617 
Summary of Held-To-Maturity Securities
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
September 30, 2025
Securities held to maturity
Corporate bonds$36,750 $594 ($861)$36,483 
   Allowance for credit losses— — — — 
Total securities held to maturity, net of ACL$36,750 $594 ($861)$36,483 
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
December 31, 2024
Securities held to maturity
Corporate bonds$36,750 $175 ($1,175)$35,750 
   Allowance for credit losses— — — — 
Total securities held to maturity, net of ACL$36,750 $175 ($1,175)$35,750 
Gross Unrealized Losses on Available For Sale Securities and the Fair Value
Gross unrealized losses on available for sale securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2025 and December 31, 2024 were as follows:

Less Than 12 MonthsMore Than 12 MonthsTotal
(In Thousands)Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
September 30, 2025
Securities available for sale
     U.S. Treasury and government sponsored entities$19,972 ($28)$265,551 ($3,970)$285,523 ($3,998)
     Corporate bonds— — 4,916 (89)4,916 (89)
     Collateralized loan obligations— — — — — — 
          Total$19,972 ($28)$270,467 ($4,059)$290,439 ($4,087)
Securities Held to Maturity
     Corporate bonds
$— $— $10,889 ($861)$10,889 ($861)
          Total$— $— $10,889 ($861)$10,889 ($861)
December 31, 2024
Securities available for sale
     U.S. Treasury and government sponsored entities$44,262 ($422)$358,446 ($11,311)$402,708 ($11,733)
     Corporate bonds— — 4,786 (223)4,786 (223)
     Collateralized loan obligations— — 4,993 (2)4,993 (2)
          Total$44,262 ($422)$368,225 ($11,536)$412,487 ($11,958)
Securities Held to Maturity
     Corporate bonds
$— $— $20,575 ($1,175)$20,575 ($1,175)
Total$— $— $20,575 ($1,175)$20,575 ($1,175)
Schedule of Amortized Cost and Fair Value by Contractual Maturity
The amortized cost and estimated fair values of available for sale and held to maturity debt securities at September 30, 2025, are distributed by contractual maturity as shown below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. 
(In Thousands)Amortized CostFair Value
June 30, 2025
U.S. Treasury and government sponsored entities
  
Within 1 year$184,617 $182,120 
1-5 years194,710 194,515 
5-10 years9,619 9,871 
Total$388,946 $386,506 
U.S. Agency mortgage-backed securities  
Over 10 years$4,887 $4,887 
Total$4,887 $4,887 
Corporate bonds  
Within 1 year$10,000 $10,015 
1-5 years5,005 4,916 
5-10 years26,750 26,468 
Total$41,755 $41,399 
Collateralized loan obligations
1-5 years$— $— 
5-10 years$17,825 $17,869 
Over 10 years5,000 5,000 
Total$22,825 $22,869 
Summary of Interest Income On Available-for-Sale Investment Securities
A summary of interest income for the three and nine-month periods ending September 30, 2025 and 2024, on available for sale investment securities are as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(In Thousands)2025202420252024
U.S. Treasury and government sponsored entities
$2,224 $2,443 $6,963 $7,511 
U.S. Agency mortgage-backed securities61 — 114 — 
Other438 965 1,624 3,168 
Total taxable interest income$2,723 $3,408 $8,701 $10,679 
Municipal securities$— $— $— $3 
Total tax-exempt interest income$— $— $— $3 
Total$2,723 $3,408 $8,701 $10,682