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Securities | 3 Months Ended
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Mar. 31, 2023
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 March 31, 2023
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (In Thousands)
Available-for-sale: |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 4,979 |  |  | $ | — |  |  | $ | (454) |  |  | 4,525 |
U.S. government agency securities - government-sponsored enterprises |  | 21,342 |  |  | 63 |  |  | (478) |  |  | 20,927 |
Municipal securities |  | 44,985 |  |  | 167 |  |  | (4,747) |  |  | 40,405 |
Residential mortgage-backed securities - government issued |  | 28,634 |  |  | 6 |  |  | (2,136) |  |  | 26,504 |
Residential mortgage-backed securities - government-sponsored enterprises |  | 125,333 |  |  | 84 |  |  | (11,346) |  |  | 114,071 |
Commercial mortgage-backed securities - government issued |  | 3,397 |  |  | — |  |  | (486) |  |  | 2,911 |
Commercial mortgage-backed securities - government-sponsored enterprises |  | 32,284 |  |  | — |  |  | (4,638) |  |  | 27,646 |
|  | $ | 260,954 |  |  | $ | 320 |  |  | $ | (24,285) |  |  | $ | 236,989 |
|  | As of December 31, 2022
|  | Amortized Cost |  | Gross 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 securities |  | 45,088 |  |  | 90 |  |  | (5,867) |  |  | 39,311 |
Residential mortgage-backed securities - government issued |  | 21,790 |  |  | — |  |  | (2,359) |  |  | 19,431 |
Residential mortgage-backed securities - government-sponsored enterprises |  | 119,265 |  |  | — |  |  | (12,942) |  |  | 106,323 |
Commercial mortgage-backed securities - government issued |  | 3,450 |  |  | — |  |  | (518) |  |  | 2,932 |
Commercial mortgage-backed securities - government-sponsored enterprises |  | 31,515 |  |  | — |  |  | (5,138) |  |  | 26,377 |
|  | $ | 239,751 |  |  | $ | 160 |  |  | $ | (27,887) |  |  | $ | 212,024 |
The amortized cost and fair value of securities held-to-maturity and the corresponding amounts of gross unrecognized gains and losses were as follows:
|  | As of March 31, 2023
|  | Amortized Cost |  | Gross Unrecognized Gains |  | Gross Unrecognized Losses |  | Fair Value
|  | (In Thousands)
Held-to-maturity: |  |  |  |  |  |  |  |
Municipal securities |  | $ | 6,597 |  |  | $ | 14 |  |  | $ | (32) |  |  | $ | 6,579 |
Residential mortgage-backed securities - government issued |  | 1,520 |  |  | — |  |  | (88) |  |  | 1,432 |
Residential mortgage-backed securities - government-sponsored enterprises |  | 1,338 |  |  | — |  |  | (68) |  |  | 1,270 |
Commercial mortgage-backed securities - government-sponsored enterprises |  | 2,006 |  |  | — |  |  | (80) |  |  | 1,926 |
|  | $ | 11,461 |  |  | $ | 14 |  |  | $ | (268) |  |  | $ | 11,207 |
|  | As of December 31, 2022
|  | Amortized Cost |  | Gross Unrecognized Gains |  | Gross Unrecognized Losses |  | Fair Value
|  | (In Thousands)
Held-to-maturity: |  |  |  |  |  |  |  |
Municipal securities |  | $ | 7,467 |  |  | $ | 7 |  |  | $ | (70) |  |  | $ | 7,404 |
Residential mortgage-backed securities - government issued |  | 1,625 |  |  | — |  |  | (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 |  |  | $ | 7 |  |  | $ | (372) |  |  | $ | 12,270 |
U.S. Treasuries contain 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 no sales of available-for-sale securities that occurred during the three months ended March 31, 2023 and 2022. At March 31, 2023 and December 31, 2022, securities with a fair value of $47.7 million and $35.9 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 March 31, 2023 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-Sale |  | Held-to-Maturity
|  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
|  | (In Thousands)
Due in one year or less |  | $ | 4,499 |  |  | $ | 4,490 |  |  | $ | 2,230 |  |  | $ | 2,225 |
Due in one year through five years |  | 16,383 |  |  | 15,386 |  |  | 3,451 |  |  | 3,425 |
Due in five through ten years |  | 16,426 |  |  | 15,320 |  |  | 916 |  |  | 929 |
Due in over ten years |  | 33,998 |  |  | 30,661 |  |  | — |  |  | — |
|  | 71,306 |  |  | 65,857 |  |  | 6,597 |  |  | 6,579 |
Residential mortgage-backed securities |  | 153,967 |  |  | 140,576 |  |  | 2,858 |  |  | 2,702 |
Commercial mortgage-backed securities |  | 35,681 |  |  | 30,556 |  |  | 2,006 |  |  | 1,926 |
|  | $ | 260,954 |  |  | $ | 236,989 |  |  | $ | 11,461 |  |  | $ | 11,207 |
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 March 31, 2023 and December 31, 2022. At March 31, 2023, the Corporation held 177 available-for-sale securities that were in an unrealized loss position. At March 31, 2023, the Corporation held 147 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 assess declines in fair value for credit losses. Consideration is given to such factors as the credit rating of the borrower, market conditions such as current interest rates, any adverse conditions specific to the security, and delinquency status on contractual payments. For the three months ended March 31, 2023 and 2022, management concluded that in all instances securities with fair value less than carrying value was due to market and other factors; thus, no credit loss provision was required. 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:
|  | As of March 31, 2023
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (In Thousands)
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | — |  |  | $ | — |  |  | $ | 4,525 |  |  | $ | 454 |  |  | $ | 4,525 |  |  | $ | 454 |
U.S. government agency securities - government-sponsored enterprises |  | 5,989 |  |  | 11 |  |  | 3,033 |  |  | 467 |  |  | 9,022 |  |  | 478 |
Municipal securities |  | 1,377 |  |  | 16 |  |  | 36,302 |  |  | 4,731 |  |  | 37,679 |  |  | 4,747 |
Residential mortgage-backed securities - government issued |  | 7,951 |  |  | 330 |  |  | 11,746 |  |  | 1,806 |  |  | 19,697 |  |  | 2,136 |
Residential mortgage-backed securities - government-sponsored enterprises |  | 24,051 |  |  | 681 |  |  | 76,466 |  |  | 10,664 |  |  | 100,517 |  |  | 11,345 |
Commercial mortgage-backed securities - government issued |  | — |  |  | — |  |  | 2,910 |  |  | 486 |  |  | 2,910 |  |  | 486 |
Commercial mortgage-backed securities - government-sponsored enterprises |  | 905 |  |  | 15 |  |  | 26,741 |  |  | 4,623 |  |  | 27,646 |  |  | 4,638 |
|  | $ | 40,273 |  |  | $ | 1,053 |  |  | $ | 161,723 |  |  | $ | 23,231 |  |  | $ | 201,996 |  |  | $ | 24,284 |
|  | As of December 31, 2022
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized 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 issued |  | 9,624 |  |  | 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 issued |  | 1,236 |  |  | 112 |  |  | 1,696 |  |  | 406 |  |  | 2,932 |  |  | 518 |
Commercial mortgage-backed securities - government-sponsored enterprises |  | 7,758 |  |  | 984 |  |  | 18,619 |  |  | 4,154 |  |  | 26,377 |  |  | 5,138 |
|  | $ | 116,851 |  |  | $ | 11,097 |  |  | $ | 82,519 |  |  | $ | 16,790 |  |  | $ | 199,370 |  |  | $ | 27,887 |
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 March 31, 2023 and December 31, 2022. At March 31, 2023, the Corporation held 32 held-to-maturity securities that were in an unrealized loss position. Management assesses HTM securities for credit losses on a quarterly basis. The assessment includes review of credit ratings, identification of delinquency and evaluation of market factors. Based on this analysis, management concludes the decline in fair value is due to market factors. Accordingly, no credit loss provision was recorded in the unaudited Consolidated Statements of Income for the three months ended March 31, 2023 and 2022. A summary of unrecognized 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:
|  | As of March 31, 2023
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrecognized Losses |  | Fair Value |  | Unrecognized Losses |  | Fair Value |  | Unrecognized Losses
|  | (In Thousands)
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | $ | 3,701 |  |  | $ | 17 |  |  | $ | 335 |  |  | $ | 15 |  |  | $ | 4,036 |  |  | $ | 32 |
Residential mortgage-backed securities - government issued |  | — |  |  | — |  |  | 1,432 |  |  | 88 |  |  | 1,432 |  |  | 88 |
Residential mortgage-backed securities - government-sponsored enterprises |  | 226 |  |  | 14 |  |  | 1,044 |  |  | 54 |  |  | 1,270 |  |  | 68 |
Commercial mortgage-backed securities - government-sponsored enterprises |  | 1,926 |  |  | 80 |  |  | — |  |  | — |  |  | 1,926 |  |  | 80 |
|  | $ | 5,853 |  |  | $ | 111 |  |  | $ | 2,811 |  |  | $ | 157 |  |  | $ | 8,664 |  |  | $ | 268 |
|  | As of December 31, 2022
|  | Less than 12 Months |  | 12 Months or Longer |  | Total
|  | Fair Value |  | Unrecognized Losses |  | Fair Value |  | Unrecognized Losses |  | Fair Value |  | Unrecognized 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 enterprises |  | 1,904 |  |  | 102 |  |  | — |  |  | — |  |  | 1,904 |  |  | 102 |
|  | $ | 10,901 |  |  | $ | 354 |  |  | $ | 267 |  |  | $ | 18 |  |  | $ | 11,168 |  |  | $ | 372 |
On January 1, 2023, the Corporation adopted ASU 2016-13, which replaced the legacy GAAP other-than-temporary impairment (“OTTI”) model with a credit loss model. ASU 2016-13 requires an allowance on lifetime expected credit losses on held to maturity debt securities. As of January 1, 2023 and March 31, 2023, the Corporation estimated the expected credit losses to be immaterial based on the composition of the securities portfolio. The credit loss model under ASU 2016-13, applicable to AFS debt securities, requires the recognition of credit losses through an allowance account, but retains the concept from the OTTI model that credit losses are recognized once securities become impaired. See Note 1, “Summary of Significant Accounting Policies” to the consolidated financial statement included in this Form 10-Q, for a discussion of the impact of the adoption of ASU 2016-13.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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