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Securities
12 Months Ended
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Securities Securities
The amortized cost and fair value of securities available-for-sale and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income were as follows:
 As of December 31, 2022
Amortized CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
 (In Thousands)
Available-for-sale:
U.S. treasuries$4,977 $— $(532)$4,445 
U.S. government agency securities - government-sponsored enterprises
13,666 70 (531)13,205 
Municipal securities45,088 90 (5,867)39,311 
Residential mortgage-backed securities - government issued21,790 — (2,359)19,431 
Residential mortgage-backed securities - government-sponsored enterprises
119,265 — (12,942)106,323 
Commercial mortgage-backed securities - government issued3,450 — (518)2,932 
Commercial mortgage-backed securities - government-sponsored enterprises31,515 — (5,138)26,377 
Other securities
— — — — 
 $239,751 $160 $(27,887)$212,024 
 As of December 31, 2021
Amortized CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
 (In Thousands)
Available-for-sale:
U.S. treasuries$4,971 $— $(57)$4,914 
U.S. government agency securities - government-sponsored enterprises
19,797 248 (110)19,935 
Municipal securities30,828 473 (344)30,957 
Residential mortgage-backed securities - government issued19,563 238 (140)19,661 
Residential mortgage-backed securities - government-sponsored enterprises
85,748 741 (784)85,705 
Commercial mortgage-backed securities - government issued5,801 36 (66)5,771 
Commercial mortgage-backed securities - government-sponsored enterprises36,786 313 (568)36,531 
Other securities2,205 23 — 2,228 
 $205,699 $2,072 $(2,069)$205,702 

The amortized cost and fair value of securities held-to-maturity and the corresponding amounts of gross unrealized gains and losses were as follows:
 As of December 31, 2022
Amortized CostGross
Unrecognized
Gains
Gross
Unrecognized
Losses
Fair Value
 (In Thousands)
Held-to-maturity:
Municipal securities$7,467 $$(70)$7,404 
Residential mortgage-backed securities - government issued1,625 — (107)1,518 
Residential mortgage-backed securities - government-sponsored enterprises
1,537 — (93)1,444 
Commercial mortgage-backed securities - government-sponsored enterprises
2,006 — (102)1,904 
 $12,635 $$(372)$12,270 
 As of December 31, 2021
Amortized CostGross
Unrecognized
Gains
Gross
Unrecognized
Losses
Fair Value
 (In Thousands)
Held-to-maturity:
Municipal securities$13,009 $222 $(3)$13,228 
Residential mortgage-backed securities - government issued2,226 40 — 2,266 
Residential mortgage-backed securities - government-sponsored enterprises
2,502 76 — 2,578 
Commercial mortgage-backed securities - government-sponsored enterprises
2,009 195 — 2,204 
 $19,746 $533 $(3)$20,276 

U.S. Treasuries contains treasury bonds issued by the United States Treasury. U.S. government agency securities - government-sponsored enterprises represent securities issued by Federal National Mortgage Association (“FNMA”) and the SBA. Municipal securities include securities issued by various municipalities located primarily within Wisconsin and are primarily general obligation bonds that are tax-exempt in nature. Residential and commercial mortgage-backed securities - government issued
represent securities guaranteed by the Government National Mortgage Association. Residential and commercial mortgage-backed securities - government-sponsored enterprises include securities guaranteed by the Federal Home Loan Mortgage Corporation, FNMA, and the FHLB. Other securities represent certificates of deposit of insured banks and savings institutions with an original maturity greater than three months. There were seven sales of available-for-sale securities in 2021 and one sale in 2020. There were no sales of available-for-sale securities that occurred during the year ended December 31, 2022.

Total proceeds and gross realized gains and losses from sales of securities available-for-sale were as follows:
 For the Year Ended December 31,
 
202220212020
 (In Thousands)
Gross gains$— $92 $— 
Gross losses— (63)(4)
Net gains (losses) on sale of available-for-sale securities$— $29 $(4)
Proceeds from sale of available-for-sale securities$— $14,955 $839 
At December 31, 2022 and 2021, securities with a fair value of $35.9 million and $70.3 million, respectively, were pledged to secure various obligations, including interest rate swap contracts and municipal deposits.
The amortized cost and fair value of securities by contractual maturity at December 31, 2022 are shown below. Actual maturities may differ from contractual maturities because issuers have the right to call or prepay certain obligations with or without call or prepayment penalties.
Available-for-SaleHeld-to-Maturity
Amortized CostFair ValueAmortized CostFair Value
 (In Thousands)
Due in one year or less$603 $593 $2,146 $2,136 
Due in one year through five years15,208 13,884 5,806 5,679 
Due in five through ten years55,058 48,141 3,823 3,670 
Due in over ten years168,882 149,406 860 785 
 $239,751 $212,024 $12,635 $12,270 
The tables below show the Corporation’s gross unrealized losses and fair value of available-for-sale investments, aggregated by investment category and length of time that individual investments were in a continuous loss position at December 31, 2022 and 2021. At December 31, 2022, the Corporation held 175 available-for-sale securities that were in an unrealized loss position. Such securities have not experienced credit rating downgrades; however, they declined in value due to the current interest rate environment. At December 31, 2022, the Corporation held 45 available-for-sale securities that have been in a continuous unrealized loss position for twelve months or greater.
The Corporation also has not specifically identified available-for-sale securities in a loss position that it intends to sell in the near term and does not believe that it will be required to sell any such securities. The Corporation reviews its securities on a quarterly basis to monitor its exposure to other-than-temporary impairment. Consideration is given to such factors as the length of time and extent to which the security has been in an unrealized loss position, changes in security ratings, and an evaluation of the present value of expected future cash flows, if necessary. Based on the Corporation’s evaluation, it is expected that the Corporation will recover the entire amortized cost basis of each security. Accordingly, no other-than-temporary impairment was recorded in the Consolidated Statements of Income for the years ended December 31, 2022 and 2021.
A summary of unrealized loss information for securities available-for-sale, categorized by security type and length of time for which the security has been in a continuous unrealized loss position, follows:
 December 31, 2022
 Less than 12 Months12 Months or LongerTotal
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
 (In Thousands)
Available-for-sale:
U.S. treasuries$— $— $4,446 $532 $4,446 $532 
U.S. government agency securities - government-sponsored enterprises— — 2,969 531 2,969 531 
Municipal securities
26,759 3,132 10,133 2,735 36,892 5,867 
Residential mortgage-backed securities - government issued9,624 436 9,807 1,923 19,431 2,359 
Residential mortgage-backed securities - government-sponsored enterprises
71,474 6,433 34,849 6,509 106,323 12,942 
Commercial mortgage-backed securities - government issued1,236 112 1,696 406 2,932 518 
Commercial mortgage-backed securities - government-sponsored enterprises7,758 984 18,619 4,154 26,377 5,138 
 $116,851 $11,097 $82,519 $16,790 $199,370 $27,887 
 December 31, 2021
 Less than 12 Months12 Months or LongerTotal
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
 (In Thousands)
Available-for-sale:
U.S. treasuries$4,914 $57 $— $— $4,914 $57 
U.S. government agency obligations - government-sponsored enterprises
3,390 110 — — 3,390 110 
Municipal securities
12,568 344 — — 12,568 344 
Residential mortgage-backed securities - government issued12,745 140 — — 12,745 140 
Residential mortgage-backed securities - government-sponsored enterprises
41,277 629 4,249 155 45,526 784 
Commercial mortgage-backed securities - government issued2,193 66 — — 2,193 66 
Commercial mortgage-backed securities - government-sponsored enterprises25,906 568 — — 25,906 568 
 $102,993 $1,914 $4,249 $155 $107,242 $2,069 

The tables below show the Corporation’s gross unrealized losses and fair value of held-to-maturity investments, aggregated by investment category and length of time that individual investments were in a continuous loss position at December 31, 2022 and 2021. At December 31, 2022, the Corporation held 40 held-to-maturity securities that were in an unrealized loss position. Such securities have not experienced credit rating downgrades; however, they declined in value due to the current interest rate environment. At December 31, 2022, the Corporation held one held-to-maturity security that had been in a continuous loss position for twelve months or greater. It is expected that the Corporation will recover the entire amortized cost basis of each held-to-maturity security based upon an evaluation of aforementioned factors. Accordingly, no other-than-temporary impairment was recorded in the Consolidated Statements of Income for the years ended December 31, 2022 and 2021.
A summary of unrealized loss information for securities held-to-maturity, categorized by security type and length of time for which the security has been in a continuous unrealized loss position, follows:
 December 31, 2022
 Less than 12 Months12 Months or LongerTotal
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
 (In Thousands)
Held-to-maturity:
Municipal securities
$6,035 $52 $267 $18 $6,302 $70 
Residential mortgage-backed securities - government issued
1,518 107 — — 1,518 107 
Residential mortgage-backed securities - government-sponsored enterprises
1,444 93 — — 1,444 93 
Commercial mortgage backed securities - government-sponsored enterprises1,904 102 — — 1,904 102 
 $10,901 $354 $267 $18 $11,168 $372 
 December 31, 2021
 Less than 12 Months12 Months or LongerTotal
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
Fair ValueUnrealized
Losses
 (In Thousands)
Held-to-maturity:
Municipal securities
$— $— $284 $$284 $
 $— $— $284 $$284 $