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SECURITIES | 12 Months Ended
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Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
SECURITIES | SECURITIES The following is a summary of securities available for sale (“AFS”) , held to maturity (“HTM”), and marketable equity securities:
(In thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Allowance
December 31, 2022 |  |  |  |  |  |  |  |  |  |
Securities available for sale |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |
U.S Treasuries |  | $ | 11,972 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 11,973 |  |  | $ | — |
Municipal bonds and obligations |  | 65,943 |  |  | 422 |  |  | (3,030) |  |  | 63,335 |  |  | — |
Agency collateralized mortgage obligations |  | 631,732 |  |  | — |  |  | (99,787) |  |  | 531,945 |  |  | — |
Agency mortgage-backed securities |  | 643,308 |  |  | 1 |  |  | (96,996) |  |  | 546,313 |  |  | — |
Agency commercial mortgage-backed securities |  | 264,218 |  |  | — |  |  | (35,750) |  |  | 228,468 |  |  | — |
Corporate bonds |  | 43,368 |  |  | 80 |  |  | (2,938) |  |  | 40,510 |  |  | — |
Other bonds and obligations |  | 655 |  |  | 67 |  |  | (66) |  |  | 656 |  |  | — |
Total securities available for sale |  | 1,661,196 |  |  | 571 |  |  | (238,567) |  |  | 1,423,200 |  |  | — |
Securities held to maturity |  |  |  |  |  |  |  |  |  |
Municipal bonds and obligations |  | 266,793 |  |  | 691 |  |  | (23,704) |  |  | 243,780 |  |  | 66 |
Agency collateralized mortgage obligations |  | 128,136 |  |  | — |  |  | (20,420) |  |  | 107,716 |  |  | — |
Agency mortgage-backed securities |  | 50,958 |  |  | — |  |  | (9,240) |  |  | 41,718 |  |  | — |
Agency commercial mortgage-backed securities |  | 135,206 |  |  | — |  |  | (23,203) |  |  | 112,003 |  |  | — |
Tax advantaged economic development bonds |  | 2,069 |  |  | 8 |  |  | (121) |  |  | 1,956 |  |  | 25 |
Other bonds and obligations |  | 291 |  |  | — |  |  | — |  |  | 291 |  |  | — |
Total securities held to maturity |  | 583,453 |  |  | 699 |  |  | (76,688) |  |  | 507,464 |  |  | 91 |
Marketable equity securities |  | 15,035 |  |  | — |  |  | (2,179) |  |  | 12,856 |  |  | — |
Total |  | $ | 2,259,684 |  |  | $ | 1,270 |  |  | $ | (317,434) |  |  | $ | 1,943,520 |  |  | $ | 91 |
December 31, 2021 |  |  |  |  |  |  |  |  |  |
Securities available for sale |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |
U.S Treasuries |  | $ | 59,972 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 59,973 |  |  | $ | — |
Municipal bonds and obligations |  | 71,822 |  |  | 5,355 |  |  | — |  |  | 77,177 |  |  | — |
Agency collateralized mortgage obligations |  | 693,782 |  |  | 5,566 |  |  | (11,012) |  |  | 688,336 |  |  | — |
Agency mortgage-backed securities |  | 711,154 |  |  | 2,347 |  |  | (7,642) |  |  | 705,859 |  |  | — |
Agency commercial mortgage-backed securities |  | 300,259 |  |  | 3,949 |  |  | (3,628) |  |  | 300,580 |  |  | — |
Corporate bonds |  | 44,824 |  |  | 950 |  |  | (114) |  |  | 45,660 |  |  | — |
Other bonds and obligations |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total securities available for sale |  | 1,881,813 |  |  | 18,168 |  |  | (22,396) |  |  | 1,877,585 |  |  | — |
Securities held to maturity |  |  |  |  |  |  |  |  |  |
Municipal bonds and obligations |  | 281,515 |  |  | 16,151 |  |  | (693) |  |  | 296,973 |  |  | 70 |
Agency collateralized mortgage-backed securities |  | 149,195 |  |  | 3,203 |  |  | (3,513) |  |  | 148,885 |  |  | — |
Agency mortgage-backed securities |  | 57,327 |  |  | 95 |  |  | (1,498) |  |  | 55,924 |  |  | — |
Agency commercial mortgage-backed securities |  | 145,573 |  |  | 266 |  |  | (3,289) |  |  | 142,550 |  |  | — |
Tax advantaged economic development bonds |  | 2,728 |  |  | 26 |  |  | (15) |  |  | 2,739 |  |  | 35 |
Other bonds and obligations |  | 165 |  |  | — |  |  | — |  |  | 165 |  |  | — |
Total securities held to maturity |  | 636,503 |  |  | 19,741 |  |  | (9,008) |  |  | 647,236 |  |  | 105 |
Marketable equity securities |  | 15,689 |  |  | 67 |  |  | (303) |  |  | 15,453 |  |  | — |
Total |  | $ | 2,534,005 |  |  | $ | 37,976 |  |  | $ | (31,707) |  |  | $ | 2,540,274 |  |  | $ | 105 |
` At year-end 2022 and 2021, accumulated net unrealized (losses) on AFS securities included in accumulated other comprehensive (loss)/income were losses of $238.0 million and $4.2 million, respectively. At year-end 2022 and 2021, accumulated net unrealized gains on the securities reclassified from AFS to HTM included in accumulated other comprehensive (loss)/income were $1.1 million and $2.4 million, respectively. The year-end 2022 and 2021 related income tax benefit/(liability) of $61.3 million and $0.4 million, respectively, was also included in accumulated other comprehensive (loss). The following table summarizes the activity in the allowance for credit losses for debt securities held to maturity by security type for the years ended December 31, 2022, 2021 and 2020:
(In thousands) | Municipal bonds and obligations |  | Tax advantaged economic development bonds |  | Total
Balance at December 31, 2021 | $ | 70 |  |  | $ | 35 |  |  | $ | 105 |
Provision (benefit) for credit losses | (4) |  |  | (10) |  |  | (14) |
Balance at December 31, 2022 | $ | 66 |  |  | $ | 25 |  |  | $ | 91 |
(In thousands) | Municipal bonds and obligations |  | Tax advantaged economic development bonds |  | Total
Balance at December 31, 2020 | $ | 64 |  |  | $ | 40 |  |  | $ | 104 |
Provision expense for credit losses | 6 |  |  | (5) |  |  | 1 |
Balance at December 31, 2021 | $ | 70 |  |  | $ | 35 |  |  | $ | 105 |
(In thousands) | Municipal bonds and obligations |  | Tax advantaged economic development bonds |  | Total
Balance at December 31, 2019 | $ | — |  |  | $ | — |  |  | $ | — |
Impact of ASC 326 adoption | 83 |  |  | 226 |  |  | 309 |
Provision (benefit) for credit losses | (19) |  |  | (186) |  |  | (205) |
Balance at December 31, 2020 | $ | 64 |  |  | $ | 40 |  |  | $ | 104 |
Credit Quality Information The Company monitors the credit quality of held to maturity securities through credit ratings from various rating agencies. Credit ratings express opinions about the credit quality of a security and are utilized by the Company to make informed decisions. Investment grade securities are rated BBB-/Baa3 or higher and generally considered by the rating agencies and market participants to be of low credit risk. Conversely, securities rated below investment grade are considered to have distinctively higher credit risk than investment grade securities. For securities without credit ratings, the Company utilizes other financial information indicating the financial health of the underlying municipality, agency, or organization. As of December 31, 2022, none of the Company's investment securities were delinquent or in non-accrual status. The amortized cost and estimated fair value of AFS and HTM securities, segregated by contractual maturity at year-end 2022 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Mortgage-backed securities and collateralized mortgage obligations are shown in total, as their maturities are highly variable.
|  | Available for sale |  | Held to maturity
(In thousands) |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Within 1 year |  | $ | 12,482 |  |  | $ | 12,482 |  |  | $ | 995 |  |  | $ | 995 |
Over 1 year to 5 years |  | 11,254 |  |  | 11,269 |  |  | 2,191 |  |  | 2,181 |
Over 5 years to 10 years |  | 49,729 |  |  | 46,904 |  |  | 28,544 |  |  | 28,543 |
Over 10 years |  | 48,473 |  |  | 45,819 |  |  | 237,423 |  |  | 214,308 |
Total bonds and obligations |  | 121,938 |  |  | 116,474 |  |  | 269,153 |  |  | 246,027 |
Mortgage-backed securities |  | 1,539,258 |  |  | 1,306,726 |  |  | 314,300 |  |  | 261,437 |
Total |  | $ | 1,661,196 |  |  | $ | 1,423,200 |  |  | $ | 583,453 |  |  | $ | 507,464 |
At year-end 2022 and 2021, the Company had pledged securities as collateral for certain municipal deposits and for interest rate swaps with certain counterparties. The total amortized cost and fair values of these pledged securities follows. Additionally, there is a blanket lien on certain securities to collateralize borrowings from the FHLBB, as discussed further in Note 11 - Borrowed Funds.
|  | 2022 |  | 2021
(In thousands) |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Securities pledged to swap counterparties |  | $ | 11,972 |  |  | $ | 11,973 |  |  | $ | 34,773 |  |  | $ | 34,896 |
Securities pledged for municipal deposits |  | 304,741 |  |  | 276,804 |  |  | 183,408 |  |  | 189,535 |
Total |  | $ | 316,713 |  |  | $ | 288,777 |  |  | $ | 218,181 |  |  | $ | 224,431 |
Proceeds from the sale of AFS securities totaled $150 million in 2022. During 2021, there were no sales of AFS securities. Proceeds from the sale of AFS securities totaled $69 million in 2020.The amounts for the sale of AFS securities were reclassified out of accumulated other comprehensive (loss)/income and into earnings. The components of net recognized gains and losses on the sale of AFS securities and the fair value change of marketable equities are as follows:
(In thousands) |  | 2022 |  | 2021 |  | 2020
Gross recognized gains |  | $ | 72 |  |  | $ | 108 |  |  | $ | 4,602 |
Gross recognized losses |  | (2,009) |  |  | (550) |  |  | (11,133) |
Net recognized (losses) |  | $ | (1,937) |  |  | $ | (442) |  |  | $ | (6,531) |
Debt securities with unrealized losses, segregated by the duration of their continuous unrealized loss positions, are summarized as follows:
|  | Less Than Twelve Months |  | Over Twelve Months |  | Total
(In thousands) |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale |  |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |
Municipal bonds and obligations |  | $ | 2,406 |  |  | $ | 36,696 |  |  | $ | 624 |  |  | $ | 2,763 |  |  | $ | 3,030 |  |  | $ | 39,459 |
Agency collateralized mortgage obligations |  | 23,052 |  |  | 247,509 |  |  | 76,735 |  |  | 284,434 |  |  | 99,787 |  |  | 531,943 |
Agency mortgage-backed securities |  | 3,124 |  |  | 37,540 |  |  | 93,872 |  |  | 508,683 |  |  | 96,996 |  |  | 546,223 |
Agency commercial mortgage-back securities |  | 9,885 |  |  | 96,396 |  |  | 25,865 |  |  | 132,043 |  |  | 35,750 |  |  | 228,439 |
Corporate bonds |  | 1,709 |  |  | 25,657 |  |  | 1,229 |  |  | 9,929 |  |  | 2,938 |  |  | 35,586 |
Other bonds and obligations |  | — |  |  | — |  |  | 66 |  |  | 295 |  |  | 66 |  |  | 295 |
Total securities available for sale |  | $ | 40,176 |  |  | $ | 443,798 |  |  | $ | 198,391 |  |  | $ | 938,147 |  |  | $ | 238,567 |  |  | $ | 1,381,945 |
Securities held to maturity |  |  |  |  |  |  |  |  |  |  |  |
Municipal bonds and obligations |  | 5,476 |  |  | 125,494 |  |  | 18,228 |  |  | 38,341 |  |  | 23,704 |  |  | 163,835 |
Agency collateralized mortgage obligations |  | 2,734 |  |  | 49,539 |  |  | 17,686 |  |  | 58,177 |  |  | 20,420 |  |  | 107,716 |
Agency mortgage-backed securities |  | 300 |  |  | 2,419 |  |  | 8,940 |  |  | 39,299 |  |  | 9,240 |  |  | 41,718 |
Agency commercial mortgage-back securities |  | 447 |  |  | 9,713 |  |  | 22,756 |  |  | 102,290 |  |  | 23,203 |  |  | 112,003 |
Tax advantaged economic development bonds |  | 1 |  |  | 142 |  |  | 120 |  |  | 1,008 |  |  | 121 |  |  | 1,150 |
Total securities held to maturity |  | 8,958 |  |  | 187,307 |  |  | 67,730 |  |  | 239,115 |  |  | 76,688 |  |  | 426,422 |
Total |  | $ | 49,134 |  |  | $ | 631,105 |  |  | $ | 266,121 |  |  | $ | 1,177,262 |  |  | $ | 315,255 |  |  | $ | 1,808,367 |
December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale |  |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |
Agency collateralized mortgage obligations |  | $ | 9,626 |  |  | $ | 375,132 |  |  | $ | 1,386 |  |  | $ | 27,025 |  |  | $ | 11,012 |  |  | $ | 402,157 |
Agency mortgage-backed securities |  | 3,179 |  |  | 222,887 |  |  | 4,463 |  |  | 175,941 |  |  | 7,642 |  |  | 398,828 |
Agency commercial mortgage-backed securities |  | 1,609 |  |  | 103,354 |  |  | 2,019 |  |  | 49,313 |  |  | 3,628 |  |  | 152,667 |
Corporate bonds |  | 114 |  |  | 11,115 |  |  | — |  |  | — |  |  | 114 |  |  | 11,115 |
Total securities available for sale |  | $ | 14,528 |  |  | $ | 712,488 |  |  | $ | 7,868 |  |  | $ | 252,279 |  |  | $ | 22,396 |  |  | $ | 964,767 |
Securities held to maturity |  |  |  |  |  |  |  |  |  |  |  |
Municipal bonds and obligations |  | 693 |  |  | 36,981 |  |  | — |  |  | — |  |  | 693 |  |  | 36,981 |
Agency collateralized mortgage obligations |  | 1,808 |  |  | 49,308 |  |  | 1,705 |  |  | 36,212 |  |  | 3,513 |  |  | 85,520 |
Agency mortgage-backed securities |  | 839 |  |  | 26,656 |  |  | 659 |  |  | 26,025 |  |  | 1,498 |  |  | 52,681 |
Agency commercial mortgage-back securities |  | 1,255 |  |  | 80,406 |  |  | 2,034 |  |  | 51,654 |  |  | 3,289 |  |  | 132,060 |
Tax advantaged economic development bonds |  | 15 |  |  | 1,255 |  |  | — |  |  | — |  |  | 15 |  |  | 1,255 |
Total securities held to maturity |  | 4,610 |  |  | 194,606 |  |  | 4,398 |  |  | 113,891 |  |  | 9,008 |  |  | 308,497 |
Total |  | $ | 19,138 |  |  | $ | 907,094 |  |  | $ | 12,266 |  |  | $ | 366,170 |  |  | $ | 31,404 |  |  | $ | 1,273,264 |
Debt Securities The Company expects to recover its amortized cost basis on all debt securities in its AFS and HTM portfolios. Furthermore, the Company does not intend to sell nor does it anticipate that it will be required to sell any of its securities in an unrealized loss position as of December 31, 2022, prior to this recovery. The Company’s ability and intent to hold these securities until recovery is supported by the Company’s strong capital and liquidity positions. The following summarizes, by investment security type, the basis for the conclusion that the debt securities in an unrealized loss position within the Company’s AFS and HTM portfolios did not maintain other-than-temporary impairment ("OTTI") at year-end 2022: AFS municipal bonds and obligations At year-end 2022, 46 out of 94 securities in the Company’s portfolio of AFS municipal bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 7.1% of the amortized cost of securities in unrealized loss positions. The Company continually monitors the municipal bond sector of the market carefully and periodically evaluates the appropriate level of exposure to the market. At this time, the Company feels the bonds in this portfolio carry minimal risk of default and the Company is appropriately compensated for that risk. There were no material underlying credit downgrades during the quarter. All securities are performing. AFS collateralized mortgage obligations At year-end 2022, 243 out of 245 securities in the Company’s portfolio of AFS collateralized mortgage obligations were in unrealized loss positions. Aggregate unrealized losses represented 15.8% of the amortized cost of securities in unrealized loss positions. The Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), and Government National Mortgage Association ("GNMA") guarantee the contractual cash flows of all of the Company's collateralized residential mortgage obligations. The securities are investment grade rated and there were no material underlying credit downgrades during 2022. All securities are performing. AFS commercial and residential mortgage-backed securities At year-end 2022, 137 out of 139 securities in the Company’s portfolio of AFS mortgage-backed securities were in unrealized loss positions. Aggregate unrealized losses represented 14.6% of the amortized cost of securities in unrealized loss positions. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of the Company’s mortgage-backed securities. The securities are investment grade rated and there were no material underlying credit downgrades during 2022. All securities are performing. AFS corporate bonds At year-end 2022, 13 out of 15 securities in the Company’s portfolio of AFS corporate bonds were in unrealized loss positions. The aggregate unrealized loss represents 7.6% of the amortized cost of bonds in unrealized loss positions. The Company reviews the financial strength of these bonds and has concluded that the amortized cost remains supported by the expected future cash flows of these securities. AFS other bonds and obligations At year-end 2022, 2 out of 3 securities in the Company’s portfolio of other bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 18.3% of the amortized cost of securities in unrealized loss positions. The securities are all investment grade rated, and there were no material underlying credit downgrades during 2022. All securities are performing. HTM municipal bonds and obligations At year-end 2022, 119 out of 190 securities in the Company’s portfolio of HTM municipal bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 12.6% of the amortized cost of securities in unrealized loss positions. The Company continually monitors the municipal bond sector of the market carefully and periodically evaluates the appropriate level of exposure to the market. At this time, the Company feels the bonds in this portfolio carry minimal risk of default and the Company is appropriately compensated for that risk. There were no material underlying credit downgrades during the quarter. All securities are performing. HTM collateralized mortgage obligations At year-end 2022, 13 out of 13 securities in the Company’s portfolio of HTM collateralized mortgage obligations were in an unrealized loss position. Aggregate unrealized losses represented 15.9% of the amortized cost of the security in an unrealized loss position. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of all of the Company's collateralized residential mortgage obligations. The securities are investment grade rated, and there were no material underlying credit downgrades during 2022. All securities are performing. HTM commercial and residential mortgage-backed securities At year-end 2022, 17 out of 17 securities in the Company’s portfolio of HTM mortgage-backed securities were in unrealized loss positions. Aggregate unrealized losses represented 17.4% of the amortized cost of securities in unrealized loss positions. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of the Company’s mortgage-backed securities. The securities are investment grade rated and there were no material underlying credit downgrades during 2022. All securities are performing. HTM tax-advantaged economic development bonds At year-end 2022, 2 out of 3 securities in the Company’s portfolio of tax-advantaged economic development bonds were in unrealized loss positions. Aggregate unrealized losses represented 9.5% of the amortized cost of securities in unrealized loss position. The Company believes that more likely than not all the principal outstanding will be collected. All securities are performing.

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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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