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Securities
 12 Months Ended
Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Securities Securities
(In Thousands, Except Number of Securities)
The amortized cost and fair value of securities available for sale were as follows as of the dates presented:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2024
Obligations of states and political subdivisions$20,266 $57 $(2,269)$18,054 
Residential mortgage-backed securities:
Government agency mortgage-backed securities185,292 81 (24,468)160,905 
Government agency collateralized mortgage obligations475,311 75 (86,870)388,516 
Commercial mortgage-backed securities:
Government agency mortgage-backed securities11,373 — (751)10,622 
Government agency collateralized mortgage obligations146,510 41 (21,595)124,956 
Other debt securities130,175 440 (2,655)127,960 
$968,927 $694 $(138,608)$831,013 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2023
Obligations of states and political subdivisions$36,374 $119 $(1,883)$34,610 
Residential mortgage-backed securities:
Government agency mortgage-backed securities301,400 172 (24,968)276,604 
Government agency collateralized mortgage obligations485,164 — (85,883)399,281 
Commercial mortgage-backed securities:
Government agency mortgage-backed securities6,029 — (637)5,392 
Government agency collateralized mortgage obligations161,299 24 (21,965)139,358 
Other debt securities72,383 109 (4,458)68,034 
$1,062,649 $424 $(139,794)$923,279 
The amortized cost and fair value of securities held to maturity were as follows as of the dates presented:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2024
Obligations of states and political subdivisions$284,542 $3 $(42,491)$242,054 
Residential mortgage-backed securities
Government agency mortgage-backed securities372,414 — (25,251)347,163 
Government agency collateralized mortgage obligations354,882 — (41,506)313,376 
Commercial mortgage-backed securities
Government agency mortgage-backed securities16,961 — (2,958)14,003 
Government agency collateralized mortgage obligations43,662 — (7,317)36,345 
Other debt securities53,683 — (4,080)49,603 
$1,126,144 $3 $(123,603)$1,002,544 
Allowance for credit losses - held to maturity securities(32)
Held-to-maturity securities, net of allowance for credit losses$1,126,112 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2023
Obligations of states and political subdivisions$288,154 $74 $(33,688)$254,540 
Residential mortgage-backed securities
Government agency mortgage-backed securities426,264 — (20,314)405,950 
Government agency collateralized mortgage obligations387,208 — (31,670)355,538 
Commercial mortgage-backed securities
Government agency mortgage-backed securities16,983 — (2,972)14,011 
Government agency collateralized mortgage obligations44,514 — (6,977)37,537 
Other debt securities58,373 — (4,119)54,254 
$1,221,496 $74 $(99,740)$1,121,830 
Allowance for credit losses - held to maturity securities(32)
Held-to-maturity securities, net of allowance for credit losses$1,221,464 
Available for sale securities sold were as follows for the years ended December 31, 2024 and 2023. There were no available for sale securities sold during the year ended December 31, 2022. For the securities sold for the year ended December 31, 2024, the Company intended to sell these as of December 31, 2023, and thereafter completed the sale in January 2024. Therefore, the Company impaired the securities identified to be sold as of December 31, 2023 and did not recognize a gain or loss during 2024.
Carrying Value Prior to ImpairmentNet ProceedsImpairment Recognized in December 2023
Twelve months ended December 31, 2024
Obligations of states and political subdivisions$12,301 $11,360 $(941)
Residential mortgage-backed securities:
Government agency mortgage-backed securities107,389 95,922 (11,467)
Government agency collateralized mortgage obligations48,300 43,990 (4,310)
Commercial mortgage-backed securities:
Government agency collateralized mortgage obligations28,547 25,913 (2,634)
$196,537 $177,185 $(19,352)
Carrying ValueNet ProceedsGain/(Loss)
Twelve months ended December 31, 2023
Obligations of other U.S. Government agencies and corporations$170,000 $164,915 $(5,085)
Obligations of states and political subdivisions104,950 99,439 (5,511)
Residential mortgage backed securities:
Government agency mortgage backed securities137,196 130,602 (6,594)
Government agency collateralized mortgage obligations54,028 51,101 (2,927)
Commercial mortgage backed securities:
Government agency mortgage backed securities5,048 4,825 (223)
Government agency collateralized mortgage obligations40,197 38,099 (2,098)
$511,419 $488,981 $(22,438)
Gross realized gains and gross realized losses on sales of securities available for sale were as follows for the periods presented:
 Year Ended December 31,
 
2024(1)
20232022
Gross gains on sales of securities available for sale$5 $126 $— 
Gross losses on sales of securities available for sale(19,357)(22,564)— 
Losses on sales of securities available for sale, net$(19,352)$(22,438)$— 
      (1) Impairment recognized in December 2023.
At December 31, 2024 and 2023, securities with a carrying value of approximately $818,344 and $880,715, respectively, were pledged to secure government, public, trust, and other deposits. Securities with a carrying value of $25,526 and $14,329 were pledged as collateral for short-term borrowings and derivative instruments at December 31, 2024 and 2023, respectively.
The amortized cost and fair value of securities at December 31, 2024 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because issuers may call or prepay obligations with or without call or prepayment penalties.
 Held to MaturityAvailable for Sale
 Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Due within one year$1,494 $1,484 $1,997 $2,043 
Due after one year through five years6,017 5,634 41,859 41,823 
Due after five years through ten years127,004 109,571 34,774 31,648 
Due after ten years150,027 125,365 4,077 3,461 
Residential mortgage-backed securities:
Government agency mortgage-backed securities372,414 347,163 185,292 160,905 
Government agency collateralized mortgage obligations354,882 313,376 475,311 388,516 
Commercial mortgage-backed securities:
Government agency mortgage-backed securities16,961 14,003 11,373 10,622 
Government agency collateralized mortgage obligations43,662 36,345 146,510 124,956 
Other debt securities53,683 49,603 67,734 67,039 
$1,126,144 $1,002,544 $968,927 $831,013 
The following tables present the gross unrealized losses and fair value of investment securities, aggregated by investment category and the length of time the investments have been in a continuous unrealized loss position, as of the dates presented:
 Less than 12 Months12 Months or MoreTotal
 #Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses
Available for Sale:
December 31, 2024
Obligations of states and political subdivisions—$— $— 7$12,841 $(2,269)7$12,841 $(2,269)
Residential mortgage-backed securities:
Government agency mortgage-backed securities711,051 (259)34141,321 (24,208)41152,372 (24,467)
Government agency collateralized mortgage obligations348,879 (482)37311,964 (86,389)40360,843 (86,871)
Commercial mortgage-backed securities:
Government agency mortgage-backed securities25,248 (122)25,375 (629)410,623 (751)
Government agency collateralized mortgage obligations27,681 (39)25104,326 (21,556)27112,007 (21,595)
Other debt securities222,357 (218)1730,801 (2,437)1953,158 (2,655)
Total16$95,216 $(1,120)122$606,628 $(137,488)138$701,844 $(138,608)
December 31, 2023
Obligations of states and political subdivisions3$2,914 $(2)9$15,198 $(1,881)12$18,112 $(1,883)
Residential mortgage-backed securities:
Government agency mortgage-backed securities1806 (25)35166,963 (24,943)36167,769 (24,968)
Government agency collateralized mortgage obligations—— — 37354,574 (85,883)37354,574 (85,883)
Commercial mortgage-backed securities:
Government agency mortgage-backed securities—— — 25,392 (637)25,392 (637)
Government agency collateralized mortgage obligations—— — 25108,575 (21,965)25108,575 (21,965)
Other debt securities23,099 (195)1935,072 (4,263)2138,171 (4,458)
Total6$6,819 $(222)127$685,774 $(139,572)133$692,593 $(139,794)
 Less than 12 months 12 months or more Total
Held to Maturity:# Fair Value Unrealized Losses# Fair Value Unrealized Losses# Fair Value Unrealized Losses
December 31, 2024
Obligations of states and political subdivisions—$— $— 128$240,394 $(42,491)128$240,394 $(42,491)
Residential mortgage-backed securities:
Government agency mortgage-backed securities—— — 69347,154 (25,251)69347,154 (25,251)
Government agency collateralized mortgage obligations—— — 18313,376 (41,506)18313,376 (41,506)
Commercial mortgage-backed securities:
Government agency mortgage-backed securities—— — 114,002 (2,958)114,002 (2,958)
Government agency collateralized mortgage obligations—— — 936,345 (7,317)936,345 (7,317)
Other debt securities—— — 1049,603 (4,080)1049,603 (4,080)
Total—$— $— 235$1,000,874 $(123,603)235$1,000,874 $(123,603)
December 31, 2023
Obligations of states and political subdivisions2$2,807 $(25)126$249,995 $(33,663)128$252,802 $(33,688)
Residential mortgage-backed securities:
Government agency mortgage-backed securities—— — 70405,950 (20,314)70405,950 (20,314)
Government agency collateralized mortgage obligations—— — 18355,538 (31,670)18355,538 (31,670)
Commercial mortgage-backed securities:
Government agency mortgage-backed securities—— — 114,011 (2,972)114,011 (2,972)
Government agency collateralized mortgage obligations—— — 937,537 (6,977)937,537 (6,977)
Other debt securities—— — 1054,254 (4,119)1054,254 (4,119)
Total2$2,807 $(25)234$1,117,285 $(99,715)236$1,120,092 $(99,740)
The Company does not intend to sell any of the securities in an unrealized loss position, and it is not more likely than not that the Company will be required to sell any such security prior to the recovery of its amortized cost basis, which may be maturity. Furthermore, more than 90% of available for sale securities have the explicit or implicit backing of the United States government. Performance of these securities has been in line with broader market price performance indicating that increases in market-based, risk free rates, and not credit-related factors, are driving losses. For municipal and corporate securities, the Company considers historical experience with credit sensitive securities, current market conditions, the financial health of the issuer, current credit ratings, ratings changes and outlook, explicit and implicit guarantees, or insurance programs when determining the fair value of the contractual cash flows. Based on its review of these factors as of December 31, 2024, the Company determined that all such losses resulted from factors not deemed credit related. As a result, no credit-related impairment was recognized in current earnings, and all unrealized losses for available for sale securities were recorded in Accumulated other Comprehensive Income.
At each of December 31, 2024 and 2023, the allowance for credit losses on held to maturity securities was $32. The Company monitors the credit quality of debt securities held to maturity using bond investment grades assigned by third party ratings agencies. Updated investment grades are obtained as they become available from the agencies. On December 31, 2024, all debt securities held to maturity were rated A or higher by the ratings agencies. As such, no additional credit loss was recorded for held to maturity securities.