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Investment Securities (Tables)
 9 Months Ended
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Gross Realized and Unrealized Gains (Losses) on Marketable Equity Securities The gross 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)2022202120222021
Unrealized gain (loss) on marketable equity securities$33 ($67)($1,199)$27 
Gain on sale of marketable equity securities, net— 36 — 67 
   Total$33 ($31)($1,199)$94 
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, 2022    
Securities available for sale    
U.S. Treasury and government sponsored entities$606,302 $— ($42,230)$— $564,072 
Municipal securities820 — (24)— 796 
Corporate bonds30,703 23 (785)— 29,941 
Collateralized loan obligations59,433 — (2,321)— 57,112 
Total securities available for sale$697,258 $23 ($45,360)$— $651,921 
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesFair Value
December 31, 2021    
Securities available for sale    
U.S. Treasury and government sponsored entities$345,514 $333 ($4,367)$— $341,480 
Municipal securities820 20 — — 840 
Corporate bonds32,721 302 (77)— 32,946 
Collateralized loan obligations51,431 9 (22)— 51,418 
Total securities available for sale$430,486 $664 ($4,466)$— $426,684 
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
December 31, 2021
Securities held to maturity
Corporate bonds$20,000 $— ($836)$19,164 
   Allowance for credit losses— — — — 
Total securities held to maturity, net of ACL$20,000 $— ($836)$19,164 
Summary of Held-To-Maturity Securities
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
September 30, 2022
Securities held to maturity
Corporate bonds$36,750 $— ($5,056)$31,694 
   Allowance for credit losses— — — — 
Total securities held to maturity, net of ACL$36,750 $— ($5,056)$31,694 
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesAllowance for Credit LossesFair Value
December 31, 2021    
Securities available for sale    
U.S. Treasury and government sponsored entities$345,514 $333 ($4,367)$— $341,480 
Municipal securities820 20 — — 840 
Corporate bonds32,721 302 (77)— 32,946 
Collateralized loan obligations51,431 9 (22)— 51,418 
Total securities available for sale$430,486 $664 ($4,466)$— $426,684 
(In Thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
December 31, 2021
Securities held to maturity
Corporate bonds$20,000 $— ($836)$19,164 
   Allowance for credit losses— — — — 
Total securities held to maturity, net of ACL$20,000 $— ($836)$19,164 
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, 2022 and December 31, 2021 were as follows:

Less Than 12 MonthsMore Than 12 MonthsTotal
(In Thousands)Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
September 30, 2022
Securities available for sale
     U.S. Treasury and government sponsored entities$304,642 ($13,125)$259,430 ($29,105)$564,072 ($42,230)
     Corporate bonds15,196 (67)4,307 (718)19,503 (785)
     Collateralized loan obligations52,433 (2,000)4,679 (321)57,112 (2,321)
     Municipal securities796 (24)— — 796 (24)
          Total$373,067 ($15,216)$268,416 ($30,144)$641,483 ($45,360)
December 31, 2021:
Securities available for sale
     U.S. Treasury and government sponsored entities$292,845 ($4,012)$21,743 ($355)$314,588 ($4,367)
     Corporate bonds4,953 (77)— — 4,953 (77)
     Collateralized loan obligations29,470 (22)— — 29,470 (22)
          Total$327,268 ($4,111)$21,743 ($355)$349,011 ($4,466)
Schedule of Amortized Cost and Fair Value by Contractual Maturity The amortized cost and estimated fair values of debt securities at September 30, 2022, 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
US Treasury and government sponsored entities  
Within 1 year$30,065 $29,497 
1-5 years576,237 534,575 
Total$606,302 $564,072 
Corporate bonds  
1-5 years$40,703 $38,555 
5-10 years26,750 26,184 
Total$67,453 $64,739 
Collateralized loan obligations
1-5 years$5,000 $4,619 
5-10 years26,940 26,214 
Over 10 years27,493 26,279 
Total$59,433 $57,112 
Municipal securities  
1-5 years$820 $796 
Total$820 $796 
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, 2022 and 2021, on available for sale investment securities are as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(In Thousands)2022202120222021
US Treasury and government sponsored entities$2,137 $552 $4,375 $1,568 
Other781 272 1,595 840 
Total taxable interest income$2,918 $824 $5,970 $2,408 
Municipal securities$4 $4 $13 $13 
Total tax-exempt interest income$4 $4 $13 $13 
Total$2,922 $828 $5,983 $2,421