HarborOne Bancorp (HONE) 10-Q7 Nov 232023 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2023	Nov. 02, 2023
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2023
Entity File Number	001-38955
Entity Registrant Name	HarborOne Bancorp, Inc.
Entity Incorporation, State or Country Code	MA
Entity Tax Identification Number	81-1607465
Entity Address, Address Line One	770 Oak Street
Entity Address, City or Town	Brockton
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02301
City Area Code	508
Local Phone Number	895-1000
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	HONE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		45,766,944
Entity Central Index Key	0001769617
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 38,573	$ 39,712
Short-term investments	208,211	58,305
Total cash and cash equivalents	246,784	98,017
Securities available for sale, at fair value	271,078	301,149
Securities held to maturity, at amortized cost (fair value of $18,683 at September 30, 2023 and $19,274 at December 31, 2022)	19,795	19,949
Federal Home Loan Bank stock, at cost	23,378	20,071
Asset held for sale	966
Loans held for sale, at fair value	17,796	18,544
Loans	4,722,854	4,549,670
Less: Allowance for credit losses on loans	(48,312)	(45,236)
Net loans	4,674,542	4,504,434
Accrued interest receivable	17,506	15,139
Mortgage servicing rights, at fair value	49,201	48,138
Property and equipment, net	48,755	49,045
Retirement plan annuities	15,023	14,630
Bank-owned life insurance	93,495	91,953
Goodwill	69,802	69,802
Intangible assets	1,704	2,272
Other assets	114,562	106,402
Total assets	5,664,387	5,359,545
Deposits:
Demand deposit accounts	708,847	762,576
NOW accounts	289,141	297,692
Regular savings and club accounts	1,324,635	1,468,172
Money market deposit accounts	951,128	861,704
Term certificate accounts	859,266	497,975
Brokered deposits	276,941	301,380
Total deposits	4,409,958	4,189,499
FHLB borrowings	475,470	400,675
Subordinated debt	34,380	34,285
Mortgagors' escrow accounts	10,155	9,537
Accrued interest payable	4,623	2,325
Other liabilities and accrued expenses	145,167	106,248
Total liabilities	5,079,753	4,742,569
Commitments and contingencies (Notes 7, 12 and 13)
Common stock, $0.01 par value; 150,000,000 shares authorized; 60,195,868 and 60,061,527 shares issued; 45,915,364 and 48,961,452 shares outstanding at September 30, 2023 and December 31, 2022, respectively	597	596
Additional paid-in capital	485,144	483,031
Retained earnings	369,930	356,438
Treasury stock, at cost, 14,280,504 and 11,100,075 shares at September 30, 2023 and December 31, 2022, respectively	(187,803)	(148,384)
Accumulated other comprehensive loss	(56,989)	(47,082)
Unearned compensation - ESOP	(26,245)	(27,623)
Total stockholders' equity	584,634	616,976
Total liabilities and stockholders' equity	$ 5,664,387	$ 5,359,545

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Consolidated Balance Sheets
Held-to-maturity Securities, Fair Value	$ 18,683	$ 19,274
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common Stock, shares issued	60,195,868	60,061,527
Common stock, shares outstanding	45,915,364	48,961,452
Treasury, shares	14,280,504	11,100,075

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest and dividend income:
Interest and fees on loans	$ 58,124	$ 42,065	$ 166,399	$ 113,163
Interest on loans held for sale	370	377	982	972
Interest on taxable securities	2,003	1,971	6,117	5,545
Other interest and dividend income	2,667	143	6,405	335
Total interest and dividend income	63,164	44,556	179,903	120,015
Interest expense:
Interest on deposits	25,039	3,491	61,014	7,131
Interest on FHLB and FRB borrowings	6,439	1,209	19,658	1,516
Interest on subordinated debentures	606	524	1,653	1,571
Total interest expense	32,084	5,224	82,325	10,218
Net interest and dividend income	31,080	39,332	97,578	109,797
Provision for credit losses	(113)	668	5,036	3,552
Net interest and dividend income, after provision for credit losses	31,193	38,664	92,542	106,245
Mortgage banking income:
Gain on sale of mortgage loans	2,704	3,809	8,228	13,669
Changes in mortgage servicing rights fair value	125	1,816	(1,131)	7,963
Other	2,270	2,453	6,798	7,623
Total mortgage banking income	5,099	8,078	13,895	29,255
Deposit account fees	5,133	4,870	14,878	14,234
Income on retirement plan annuities	146	119	393	338
Bank-owned life insurance income	531	503	1,542	1,480
Other income	689	675	2,242	2,102
Total noninterest income	11,598	14,245	32,950	47,409
Noninterest expense:
Compensation and benefits	18,699	20,991	54,718	63,169
Occupancy and equipment	4,430	4,829	14,103	14,832
Data processing	2,548	2,311	7,297	6,811
Loan expenses	385	355	1,115	1,218
Marketing	794	850	2,900	3,054
Deposit expenses	534	587	1,394	1,646
Postage and printing	348	373	1,230	1,204
Professional fees	1,374	1,457	3,989	4,676
Foreclosed and repossessed assets	2		(10)	18
Deposit insurance	1,004	357	2,690	1,060
Other expenses	1,754	2,363	5,680	6,574
Total noninterest expense	31,872	34,473	95,106	104,262
Income before income taxes	10,919	18,436	30,386	49,392
Income tax provision	2,507	4,678	7,198	13,380
Net income	$ 8,412	$ 13,758	$ 23,188	$ 36,012
Earnings per common share:
Basic	$ 0.20	$ 0.30	$ 0.53	$ 0.77
Diluted	$ 0.20	$ 0.30	$ 0.53	$ 0.76
Weighted average shares outstanding:
Weighted average common shares, basic	42,876,893	45,830,737	43,591,954	46,875,312
Weighted average common shares, diluted	42,983,477	46,420,527	43,793,137	47,541,647

Consolidated Statements of Comp

Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Consolidated Statements of Comprehensive (Loss) Income
Net income	$ 8,412	$ 13,758	$ 23,188	$ 36,012
Unrealized gain/loss on cashflow hedge:
Unrealized holding gains	598	2,658	2,005	7,386
Reclassification adjustment for net (gains) losses included in net income	(1,221)	(420)	(3,373)	(380)
Net change in unrealized (losses) gains on derivatives in cashflow hedging instruments	(623)	2,238	(1,368)	7,006
Related tax effect	175	(628)	385	(1,968)
Net-of-tax amount	(448)	1,610	(983)	5,038
Unrealized gain/loss on securities available for sale:
Unrealized holding gains (losses)	(14,718)	(20,554)	(12,995)	(66,806)
Related tax effect	4,487	4,530	4,129	14,724
Net-of-tax amount	(10,231)	(16,024)	(8,866)	(52,082)
Postretirement benefit:
Adjustment of accumulated obligation for postretirement benefits			1
Reclassification adjustment for gains recognized in net periodic benefit cost	(20)		(59)
Net gains	(20)		(58)
Total other comprehensive loss	(10,699)	(14,414)	(9,907)	(47,044)
Comprehensive income (loss)	$ (2,287)	$ (656)	$ 13,281	$ (11,032)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Income (Loss)	Unearned Compensation - ESOP	Cumulative Effect, Period of Adoption, Adjustment	Total
Balance at beginning of period at Dec. 31, 2021	$ 585	$ 469,934	$ (1,884)	$ 325,699	$ (85,859)	$ (1,637)	$ (29,461)	$ (1,884)	$ 679,261
Balance, beginning of period (in shares) at Dec. 31, 2021	52,390,478
Comprehensive income (loss)				36,012		(47,044)			(11,032)
Dividends declared per share				(9,778)					(9,778)
ESOP shares committed to be released		1,078					1,378		2,456
Restricted stock awards granted, net of forfeitures (in shares)	97,971
Performance stock units vested (in shares)	14,596
Share-based compensation expense		2,744							2,744
Stock option exercised	$ 8	6,861							6,869
Stock option exercised (in shares)	722,705
Treasury stock purchased					(57,266)				(57,266)
Treasury stock purchased (in shares)	(4,023,090)
Balance at end of period at Sep. 30, 2022	$ 593	480,617		350,049	(143,125)	(48,681)	(28,083)		611,370
Balance, end of period (in shares) at Sep. 30, 2022	49,202,660
Balance at beginning of period at Jun. 30, 2022	$ 593	479,519		339,471	(132,296)	(34,267)	(28,542)		624,478
Balance, beginning of period (in shares) at Jun. 30, 2022	49,989,007
Comprehensive income (loss)				13,758		(14,414)			(656)
Dividends declared per share				(3,180)					(3,180)
ESOP shares committed to be released		354					459		813
Restricted stock awards granted, net of forfeitures (in shares)	(2,845)
Share-based compensation expense		744							744
Treasury stock purchased					(10,829)				(10,829)
Treasury stock purchased (in shares)	(783,502)
Balance at end of period at Sep. 30, 2022	$ 593	480,617		350,049	(143,125)	(48,681)	(28,083)		611,370
Balance, end of period (in shares) at Sep. 30, 2022	49,202,660
Balance at beginning of period at Dec. 31, 2022	$ 596	483,031		356,438	(148,384)	(47,082)	(27,623)		$ 616,976
Balance, beginning of period (in shares) at Dec. 31, 2022	48,961,452								48,961,452
Comprehensive income (loss)				23,188		(9,907)			$ 13,281
Dividends declared per share				(9,696)					(9,696)
ESOP shares committed to be released		507					1,378		1,885
Restricted stock awards granted, net of forfeitures (in shares)	134,341
Share-based compensation expense	$ 1	1,606							1,607
Treasury stock purchased					(39,419)				(39,419)
Treasury stock purchased (in shares)	(3,180,429)
Balance at end of period at Sep. 30, 2023	$ 597	485,144		369,930	(187,803)	(56,989)	(26,245)		$ 584,634
Balance, end of period (in shares) at Sep. 30, 2023	45,915,364								45,915,364
Balance at beginning of period at Jun. 30, 2023	$ 597	484,544		364,709	(181,324)	(46,290)	(26,704)		$ 595,532
Balance, beginning of period (in shares) at Jun. 30, 2023	46,575,478
Comprehensive income (loss)				8,412		(10,699)			(2,287)
Dividends declared per share				(3,191)					(3,191)
ESOP shares committed to be released		104					459		563
Restricted stock awards granted, net of forfeitures (in shares)	(7,591)
Share-based compensation expense		496							496
Treasury stock purchased					(6,479)				(6,479)
Treasury stock purchased (in shares)	(652,523)
Balance at end of period at Sep. 30, 2023	$ 597	$ 485,144		$ 369,930	$ (187,803)	$ (56,989)	$ (26,245)		$ 584,634
Balance, end of period (in shares) at Sep. 30, 2023	45,915,364								45,915,364

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Consolidated Statements of Changes in Stockholders' Equity
Dividends declared per share	$ 0.075	$ 0.07	$ 0.225	$ 0.21
ESOP shares committed to be released (in shares)	57,681	57,680	173,042	173,042

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 23,188	$ 36,012
Adjustments to reconcile net income to net cash used by operating activities:
Provision for credit losses	5,036	3,552
Net amortization of securities premiums/discounts	338	821
Proceeds from sale of loans	331,775	510,260
Loans originated for sale	(322,929)	(471,314)
Accretion of net deferred loan costs/fees and premiums	(94)	(315)
Depreciation and amortization of premises and equipment	2,872	2,924
Change in mortgage servicing rights fair value	1,131	(7,963)
Mortgage servicing rights capitalized	(2,194)	(3,630)
Accretion of fair value adjustment on loans and deposits, net	(251)	(1,043)
Amortization of other intangible assets	568	703
Amortization of subordinated debt issuance costs	95	95
Net gains on mortgage loan sales, including fair value adjustments	(8,098)	(12,109)
Bank-owned life insurance income	(1,542)	(1,480)
Income on retirement plan annuities	(393)	(338)
Write-down of asset held for sale		196
Net loss on disposal of premises and equipment	17	41
Net gain on sale and write-down of other real estate owned and repossessed assets	(12)	(30)
ESOP expense	1,885	2,456
Share-based compensation expense	1,607	2,744
Net change in:
Increase in operating lease ROU assets	1,478	1,019
Increase in operating lease liabilities	(1,473)	(976)
Change in other assets	(9,393)	(13,909)
Change in other liabilities	45,973	5,570
Net cash provided by operating activities	69,584	53,286
Activity in securities available for sale:
Maturities, prepayments and calls	16,731	37,659
Purchases		(16,102)
Activity in securities held to maturity:
Maturities, prepayment and calls	160
Purchases		(15,000)
Net redemption (purchase) of FHLB stock	(3,307)	(10,042)
Proceeds on asset held for sale		685
Loan pool purchase		(58,311)
Participation-in loan purchases	(31,443)	(116,144)
Net loan originations	(145,625)	(415,391)
Proceeds from sale of other real estate owned and repossessed assets	282	247
Additions to property and equipment	(3,565)	(1,335)
Net cash used by investing activities	(166,767)	(593,734)
Cash flows from financing activities:
Net increase in deposits	220,355	200,379
Net change in short-term borrowed funds	(135,000)	330,000
Proceeds from FHLB borrowings	255,000
Repayment of FHLB borrowings	(45,204)	(40,027)
Net change in mortgagors' escrow accounts	618	1,383
Proceeds from exercise of stock options		6,869
Treasury stock purchased	(39,419)	(57,266)
Dividends paid	(10,400)	(9,655)
Net cash provided by financing activities	245,950	431,683
Net change in cash and cash equivalents	148,767	(108,765)
Cash and cash equivalents at beginning of period	98,017	194,719
Cash and cash equivalents at end of period	246,784	85,954
Supplemental cash flow information:
Interest paid on deposits	59,691	6,667
Interest paid on borrowed funds	21,242	3,248
Income taxes paid, net	7,507	8,020
Transfer of loans to other real estate owned and repossessed assets	228	238
Dividends declared	$ 9,696	$ 9,778

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Sep. 30, 2023
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Consolidation The unaudited interim Consolidated Financial Statements of HarborOne Bancorp, Inc. presented herein have been prepared pursuant to the rules of the SEC for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by GAAP. In the opinion of management, all adjustments and disclosures considered necessary for the fair presentation of the accompanying Consolidated Financial Statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements for the years ended December 31, 2022 and 2021 and notes thereto included in the Company’s Annual Report on Form 10-K. The unaudited interim Consolidated Financial Statements include the accounts of the Company; the Company’s subsidiaries, Legion Parkway Company LLC (a security corporation) and HarborOne Bank; and the Bank’s wholly-owned subsidiaries, which consist of HarborOne Mortgage, LLC, HarborOne Security Company, Inc. and a passive investment corporation. The passive investment corporation maintains and manages certain assets of the Bank. The security company was established for the purpose of buying, holding and selling securities on its own behalf. All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year financial statement presentation. These changes and reclassifications did not impact previously reported net income or comprehensive income. Nature of Operations The Company provides a variety of financial services to individuals and businesses through its 30 full-service branches in Massachusetts and Rhode Island, and a commercial lending office in each of Boston, Massachusetts and Providence, Rhode Island. HarborOne Mortgage maintains offices in Florida, Maine, Massachusetts, New Hampshire, New Jersey and Rhode Island and originates loans in five additional states. The Company’s primary deposit products are checking, money market, savings, and term certificate of deposit accounts, while its primary lending products are commercial real estate, commercial, residential mortgages, home equity, and consumer loans. The Company also originates, sells and services residential mortgage loans through HarborOne Mortgage. Risks and Uncertainties During the first quarter of 2023, the banking industry experienced significant volatility with multiple high-profile bank failures and industry-wide concerns related to liquidity, deposit outflows, unrealized securities losses and eroding consumer confidence in the banking system. In response to these events, the Treasury, the Federal Reserve, and the FDIC jointly announced the BTFP on March 12, 2023. This program aims to enhance liquidity by allowing institutions to pledge certain securities at the par value of the securities, and at a borrowing rate of ten basis points over the one-year overnight index swap rate. The BTFP is available to eligible U.S. federally insured depository institutions, with advances having a term of up to one year and no prepayment penalties. Macroeconomic trends are mixed as uncertainty remains about the economy and banking industry. Reliance on secondary funding sources could increase the Company’s overall cost of funds and thereby reduce net income. While the Company believes its current sources of liquidity are adequate to fund operations, there is no guarantee they will suffice to meet future liquidity demands. This may necessitate slowing or discontinuing loan growth, capital expenditures, or other investments, or liquidating assets. Additionally, the Company could experience adverse effects on its business, financial condition, results of operations and cash flows if there is severe or prolonged inflation, a recession, further escalation of the current geopolitical situation, or sustained supply chain disruptions. While asset quality continues to point to economic recovery, the Company’s customers could experience similar adverse effects from these uncertainties that would impair their ability to fulfill their financial obligations to the Company resulting in deteriorating credit quality and loan charge-offs. Summary of Significant Accounting Policies and Recently Adopted Accounting Standards Updates Significant accounting policies in effect and disclosed within the Company’s most recent audited Consolidated Financial Statements as of December 31, 2022 remain substantially unchanged. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments – Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures” ASU 2022-02 also requires that public business entities disclose current-period gross charge-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, “Financial Instruments—Credit Losses—Measured at Amortized Cost.” The Company adopted ASU 2022-02 effective January 1, 2023 on a modified retrospective basis. The adoption of ASU 2022-02 did not have a material impact on the Company’s Consolidated Financial Statements.

DEBT SECURITIES

DEBT SECURITIES	9 Months Ended
DEBT SECURITIES	Sep. 30, 2023
DEBT SECURITIES
DEBT SECURITIES	2. DEBT SECURITIES The following is a summary of securities available for sale and held to maturity: Gross Gross Allowance Amortized Unrealized Unrealized for Credit Fair Cost Gains Losses Losses Value (in thousands) September 30, 2023: Securities available for sale U.S. government and government-sponsored enterprise obligations $ 47,143 $ — $ 9,013 $ — $ 38,130 U.S. government agency and government-sponsored residential mortgage-backed securities 300,266 — 71,774 — 228,492 U.S. government-sponsored collateralized mortgage obligations 2,034 — 102 — 1,932 SBA asset-backed securities 1,885 — 161 — 1,724 Corporate bonds 1,000 — 200 — 800 Total securities available for sale $ 352,328 $ — $ 81,250 $ — $ 271,078 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ 15,000 $ — $ 782 $ — $ 14,218 SBA asset-backed securities 4,795 — 330 — 4,465 Total securities held to maturity $ 19,795 $ — $ 1,112 $ — $ 18,683 Gross Gross Allowance Amortized Unrealized Unrealized for Credit Fair Cost Gains Losses Losses Value (in thousands) December 31, 2022: Securities available for sale U.S. government and government-sponsored enterprise obligations $ 47,143 $ — $ 8,649 $ — $ 38,494 U.S. government agency and government-sponsored residential mortgage-backed securities 315,964 — 59,149 — 256,815 U.S. government-sponsored collateralized mortgage obligations 2,612 — 113 — 2,499 SBA asset-backed securities 2,685 — 190 — 2,495 Corporate bonds 1,000 — 154 — 846 Total securities available for sale $ 369,404 $ — $ 68,255 $ — $ 301,149 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ 15,000 $ — $ 597 $ — $ 14,403 SBA asset-backed securities 4,949 — 78 — 4,871 Total securities held to maturity $ 19,949 $ — $ 675 $ — $ 19,274 Accrued interest receivable is excluded from the amortized cost basis of debt securities. Accrued interest receivable totaled $913,000 and $957,000 as of September 30, 2023 and December 31, 2022, respectively. At September 30, 2023, available-for-sale debt securities with a fair value of $268.6 million and held-to-maturity securities with an amortized cost of $15.0 million were pledged as collateral to provide BTFP borrowing capacity. The BTFP provides for funding based on the par value of the collateral which was $361.0 million. The amortized cost and fair value of debt securities by contractual maturity at September 30, 2023 is as follows: Available for Sale Held to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (in thousands) After 1 year through 5 years $ 6,998 $ 6,380 $ 15,000 $ 14,218 After 5 years through 10 years 41,145 32,550 — — Over 10 years — — — — 48,143 38,930 15,000 14,218 U.S. government agency and government-sponsored residential mortgage-backed securities 300,266 228,492 — — U.S. government-sponsored collateralized mortgage obligations 2,034 1,932 — — SBA asset-backed securities 1,885 1,724 4,795 4,465 Total $ 352,328 $ 271,078 $ 19,795 $ 18,683 U.S. government-sponsored residential mortgage-backed securities, collateralized mortgage obligations, and securities whose underlying assets are loans from the SBA have stated maturities of two to 28 years ; however, it is expected that such securities will have shorter actual lives due to prepayments. U.S. government and government-sponsored enterprise obligations and corporate bonds are callable at the discretion of the issuer. U.S. government and government-sponsored enterprise obligations and corporate bonds with a total fair value of $53.1 million have a final maturity of four to nine years and a call feature of one month to four years . At September 30, 2023, there were no holdings of securities of any one issuer, other than the U.S. government and its agencies, in an amount greater than 10% of shareholder equity. There were no sales or calls of securities in the three and nine months ended September 30, 2023 and 2022, respectively. Information pertaining to securities with gross unrealized losses at September 30, 2023 and December 31, 2022 aggregated by investment category and length of time that individual securities have been in a continuous loss position follows: Less Than Twelve Months Twelve Months and Over Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (in thousands) September 30, 2023: Securities available for sale U.S. government and government-sponsored enterprise obligations $ — $ — $ 9,013 $ 38,130 U.S. government agency and government-sponsored residential mortgage-backed securities — 34 71,774 228,458 U.S. government-sponsored collateralized mortgage obligations — — 102 1,932 SBA asset-backed securities — — 161 1,724 Corporate bonds — — 200 800 $ — $ 34 $ 81,250 $ 271,044 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ — $ — 782 14,218 SBA asset-backed securities 330 4,465 — — $ 330 $ 4,465 $ 782 $ 14,218 December 31, 2022: Securities available for sale U.S. government and government-sponsored enterprise obligations $ 249 $ 4,751 $ 8,400 $ 33,743 U.S. government agency and government-sponsored residential mortgage-backed securities 3,620 35,214 55,529 221,566 U.S. government-sponsored collateralized mortgage obligations 113 2,499 — — SBA asset-backed securities 190 2,495 — — Corporate bonds 154 846 — — $ 4,326 $ 45,805 $ 63,929 $ 255,309 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ 597 $ 14,403 $ — $ — SBA asset-backed securities 78 4,871 — — $ 675 $ 19,274 $ — $ — Management assesses the decline in fair value of investment securities on a regular basis. Unrealized losses on debt securities may occur from current market conditions, increases in interest rates since the time of purchase, a structural change in an investment, volatility of earnings of a specific issuer, or deterioration in credit quality of the issuer. Management evaluates both qualitative and quantitative factors to assess whether an impairment exists. As of September 30, 2023, the Company’s security portfolio consisted of 132 debt securities, all of which were in an unrealized loss position. The unrealized losses are primarily related to the Company’s debt securities that were issued by U.S. government-sponsored enterprises and agencies. The Company does not believe that the debt securities that were in an unrealized loss position as of September 30, 2023 represent a credit loss impairment. As of September 30, 2023, and December 31, 2022, the gross unrealized loss positions were primarily related to mortgage-backed securities and other obligations issued by U.S. government agencies or U.S. government-sponsored enterprises. These securities carry the explicit and/or implicit guarantee of the U.S. government and have a long history of zero credit loss. Total gross unrealized losses were primarily attributable to changes in interest rates relative to when the investment securities were purchased, and not due to the credit quality of the investment securities. Management reviewed the collectability of the corporate bonds taking into consideration such factors as the financial condition of the issuers, reported regulatory capital ratios of the issuers, credit ratings, including ratings in effect as of the reporting period date as well as credit rating changes between the reporting period date and the filing date of this report, and other information. Management believes the unrealized losses on the corporate bonds are primarily attributable to changes in the investment spreads and interest rates and not changes in the credit quality of the issuers of the corporate bonds. Management expects to recover the entire amortized cost basis of the available-for-sale debt securities with an unrealized loss. Furthermore, the Company does not intend to sell these securities, and it is unlikely that the Company will be required to sell these securities, before recovery of their cost basis, which may be at maturity. Therefore, no ACL was recorded at September 30, 2023 . As of September 30, 2023 , the held-to-maturity securities were U.S. government sponsored agency obligations. These securities are guaranteed by the government sponsored agency with a long history of no credit losses and Management has determined these securities to have a zero loss expectation and therefore does not estimate an ACL on these securities.

LOANS HELD FOR SALE

LOANS HELD FOR SALE	9 Months Ended
LOANS HELD FOR SALE	Sep. 30, 2023
LOANS HELD FOR SALE
LOANS HELD FOR SALE	3. LOANS HELD FOR SALE The following table provides the fair value and contractual principal balance outstanding of loans held for sale accounted for under the fair value option: September 30, December 31, 2023 2022 (in thousands) Loans held for sale, fair value $ 17,796 $ 18,544 Loans held for sale, contractual principal outstanding 17,590 18,208 Fair value less unpaid principal balance $ 206 $ 336 The Company has elected the fair value option for mortgage loans held for sale to better match changes in fair value of the loans with changes in the fair value of the forward sale commitment contracts used to economically hedge them. Changes in fair value of mortgage loans held for sale accounted for under the fair value option election amounted to a decrease of $165,000 and $130,000 in the three and nine months ended September 30, 2023, respectively, to $206,000, compared to a decrease of $768,000 and $1.6 million in the three and nine months ended September 30, 2022, respectively. These amounts are offset in earnings by the changes in fair value of forward sale commitments. The changes in fair value are reported as a component of gain on sale of mortgage loans in the Unaudited Consolidated Statements of Income. At September 30, 2023 and December 31, 2022, there were no loans held for sale that were greater than 90 days past due.

LOANS AND ALLOWANCE FOR CREDIT

LOANS AND ALLOWANCE FOR CREDIT LOSSES	9 Months Ended
LOANS AND ALLOWANCE FOR CREDIT LOSSES	Sep. 30, 2023
LOANS AND ALLOWANCE FOR CREDIT LOSSES
LOANS AND ALLOWANCE FOR CREDIT LOSSES	4. LOANS AND ALLOWANCE FOR CREDIT LOSSES A summary of the balances of loans follows: September 30, December 31, 2023 2022 (in thousands) Residential real estate: One- to four-family $ 1,513,326 $ 1,432,263 Second mortgages and equity lines of credit 174,814 166,219 Residential real estate construction 20,272 35,837 Total residential real estate loans 1,708,412 1,634,319 Commercial: Commercial real estate 2,349,886 2,250,344 Commercial construction 191,224 199,311 Commercial and industrial 450,547 424,275 Total commercial loans 2,991,657 2,873,930 Consumer loans: Auto 15,797 33,625 Personal 8,450 7,796 Total consumer loans 24,247 41,421 Total loans before basis adjustment 4,724,316 4,549,670 Basis adjustment associated with fair value hedge (1) (1,462) — Total loans 4,722,854 4,549,670 Allowance for credit losses on loans (48,312) (45,236) Loans, net $ 4,674,542 $ 4,504,434 (1) Note 10 - Derivatives The net unamortized deferred loan origination costs included in total loans and leases were $8.3 million and $7.4 million as of September 30, 2023 and December 31, 2022, respectively. As of September 30, 2023 and December 31, 2022, the commercial and industrial loans includes $355,000 and $2.1 million, respectively, of SBA PPP loans and $50,000 and $65,000, respectively, of deferred fees on the PPP loans. PPP loans are fully guaranteed by the U.S. government. The Company has transferred a portion of its originated commercial loans to participating lenders. The amounts transferred have been accounted for as sales and are therefore not included in the Company’s accompanying unaudited interim Consolidated Balance Sheets. The Company and participating lenders share ratably in cash flows and any gains or losses that may result from a borrower’s lack of compliance with contractual terms of the loan. The Company continues to service the loans on behalf of the participating lenders and, as such, collects cash payments from the borrowers, remits payments to participating lenders, and disburses required escrow funds to relevant parties. At September 30, 2023 and December 31, 2022, the Company was servicing commercial loans for participants in the aggregate amount of $397.6 million and $366.4 million, respectively. The following table presents the activity in the ACL on loans for the three and nine months ended September 30, 2023 and 2022: Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2023 $ 12,185 $ 1,012 $ 630 $ 20,599 $ 5,373 $ 7,750 $ 272 $ 47,821 Charge-offs — — — — — (16) (21) (37) Recoveries — 40 — 2 — — 13 55 Provision 488 (28) (164) 900 (937) 242 (28) 473 Balance at September 30, 2023 $ 12,673 $ 1,024 $ 466 $ 21,501 $ 4,436 $ 7,976 $ 236 $ 48,312 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at December 31, 2022 $ 11,532 $ 924 $ 280 $ 20,357 $ 4,645 $ 7,236 $ 262 $ 45,236 Charge-offs — — — (2,918) — (51) (70) (3,039) Recoveries 2 83 — 4 — 275 34 398 Provision 1,139 17 186 4,058 (209) 516 10 5,717 Balance at September 30, 2023 $ 12,673 $ 1,024 $ 466 $ 21,501 $ 4,436 $ 7,976 $ 236 $ 48,312 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2022 $ 10,082 $ 849 $ 327 $ 20,431 $ 4,370 $ 7,174 $ 327 $ 43,560 Charge-offs — — — (24) — (205) (24) (253) Recoveries 2 15 — 7 — 1,021 7 1,052 Provision 834 (16) (33) 741 99 (1,300) (63) 262 Balance at September 30, 2022 $ 10,918 $ 848 $ 294 $ 21,155 $ 4,469 $ 6,690 $ 247 $ 44,621 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Unallocated Total (in thousands) Balance at December 31, 2021 $ 3,631 $ 420 $ 69 $ 33,242 $ 2,010 $ 4,638 $ 367 $ 1,000 $ 45,377 Adoption of Topic 326 5,198 391 185 (10,194) 1,698 2,288 123 (1,000) (1,311) Charge-offs — — — (2,810) — (246) (55) — (3,111) Recoveries 2 108 — 13 — 1,495 67 — 1,685 Provision 2,087 (71) 40 904 761 (1,485) (255) — 1,981 Balance at September 30, 2022 $ 10,918 $ 848 $ 294 $ 21,155 $ 4,469 $ 6,690 $ 247 $ — $ 44,621 As of September 30, 2023, the carrying value of individually analyzed loans amounted to $18.7 million, with a related allowance of $200,000, and $18.5 million of individually analyzed loans were considered collateral-dependent. As of December 31, 2022, the carrying value of individually analyzed loans amounted to $23.8 million, with a related allowance of $203,000, and $15.9 million were considered collateral-dependent. For collateral-dependent loans where management has determined that foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and repayment of the loan is to be provided substantially through the operation or sale of the collateral, the ACL is measured based on the difference between the fair value of the collateral and the amortized cost basis of the loan as of the measurement date. The following table presents the carrying value of collateral-dependent individually analyzed loans as of September 30, 2023 and December 31, 2022: September 30, 2023 December 31, 2022 Related Related Carrying Value Allowance Carrying Value Allowance (in thousands) Commercial: Commercial real estate $ 8,811 $ 5 $ 2,039 $ — Commercial and industrial 1,982 191 3,329 7 Commercial construction — — — — Total Commercial 10,793 196 5,368 7 Residential real estate 7,741 1 10,494 1 Total $ 18,534 $ 197 $ 15,862 $ 8 The following is a summary of past due and non-accrual loans at September 30, 2023 and December 31, 2022: 90 Days 30-59 Days 60-89 Days or More Total Loans on Past Due Past Due Past Due Past Due Non-accrual (in thousands) September 30, 2023 Residential real estate: One- to four-family $ 2,078 $ 1,168 $ 3,018 $ 6,264 $ 7,498 Second mortgages and equity lines of credit 171 137 305 613 453 Commercial real estate — — 7,004 7,004 8,811 Commercial construction — — — — — Commercial and industrial 274 97 1,437 1,808 1,980 Consumer: Auto 132 16 30 178 31 Personal 36 17 5 58 10 Total $ 2,691 $ 1,435 $ 11,799 $ 15,925 $ 18,783 December 31, 2022 Residential real estate: One- to four-family $ 3,711 $ 524 $ 6,526 $ 10,761 $ 8,927 Second mortgages and equity lines of credit 407 5 189 601 421 Commercial real estate — — 120 120 2,039 Commercial construction — — — — — Commercial and industrial 26 492 2,901 3,419 3,329 Consumer: Auto 348 101 51 500 64 Personal 18 — 6 24 6 Total $ 4,510 $ 1,122 $ 9,793 $ 15,425 $ 14,786 At September 30, 2023 and December 31, 2022, there were no loans past due 90 days or more and still accruing. Loan Modifications to Borrowers Experiencing Financial Difficulty Effective January 1, 2023, ASU 2022-02 Financial Instruments-Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures was adopted. The Bank will modify the contractual terms of loans to a borrower experiencing financial difficulties as a way to mitigate loss and comply with regulations regarding bankruptcy and discharge situations. Modifications to borrowers experiencing financial difficulty may include interest rate reductions, principal or interest forgiveness, forbearances, term extensions, and other actions intended to minimize economic loss and to avoid foreclosure or repossession of collateral. There were no material loan modifications based on borrower financial difficulty during the three and nine months ended September 30, 2023. There was one TDR loan modification during the three and nine months ended September 30, 2022. The TDR loan modification in 2022 provided a deferral of principal. There were no loans to borrowers experiencing financial difficulty that had a payment default during the three and nine months ended September 30, 2023 and 2022 and were modified in the twelve months prior to that default. Default is determined at 90 or more days past due, upon charge-off, or upon foreclosure. Modified loans in default are individually evaluated for the allowance for credit losses or if the modified loan is deemed uncollectible, the loan, or a portion of the loan, is written off, and the allowance for credit losses is adjusted accordingly. Credit Quality Indicators Commercial The Company uses a ten-grade internal loan rating system for commercial real estate, commercial construction and commercial loans, as follows: Loans rated 1 – 6 are considered “pass”-rated loans with low to average risk. Loans rated 7 are considered “special mention.” These loans are starting to show signs of potential weakness and are being closely monitored by management. Loans rated 8 are considered “substandard.” Generally, a loan is considered substandard if it is inadequately protected by the current net worth and paying capacity of the obligors and/or the collateral pledged. There is a distinct possibility that the Company will sustain some loss if the weakness is not corrected. Loans rated 9 are considered “doubtful.” Loans classified as doubtful have all the weaknesses inherent in those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, highly questionable and improbable. Loans rated 10 are considered “uncollectible” (loss), and of such little value that their continuance as loans is not warranted. Loans not rated consist primarily of certain smaller balance commercial real estate and commercial loans that are managed by exception. On an annual basis, or more often if needed, the Company formally reviews on a risk-adjusted basis, the ratings on substantially all commercial real estate, construction and commercial loans. Semi-annually, the Company engages an independent third party to review a significant portion of loans within these segments. Management uses the results of these reviews as part of its annual review process. Residential and Consumer On a monthly basis, the Company reviews the residential construction, residential real estate and consumer installment portfolios for credit quality primarily through the use of delinquency reports. The following table summarizes the Company’s loan portfolio by credit quality indicator and loan portfolio segment as of September 30, 2023: Revolving Revolving Loans Loans Converted Term Loans at Amortized Cost by Origination Year Amortized to Term 2023 2022 2021 2020 2019 Prior Cost Loans Total (in thousands) As of September 30, 2023 Commercial real estate Pass $ 124,574 $ 817,946 $ 454,639 $ 237,296 $ 246,011 $ 415,685 $ — $ — $ 2,296,151 Special mention — 17,026 — 4,309 9,063 14,526 — — 44,924 Substandard — — — — — 1,812 — — 1,812 Doubtful — — — — — 6,999 — — 6,999 Total commercial real estate 124,574 834,972 454,639 241,605 255,074 439,022 — — 2,349,886 YTD gross charge-offs — — — — — 2,918 — — 2,918 Commercial and industrial Pass 53,242 51,548 96,455 75,178 23,999 78,676 68,852 — 447,950 Special mention — — 5 — 2 610 — — 617 Substandard 19 88 72 — — 385 50 — 614 Doubtful — — 9 — — 1,307 50 — 1,366 Total commercial and industrial 53,261 51,636 96,541 75,178 24,001 80,978 68,952 — 450,547 YTD gross charge-offs 5 18 14 5 8 1 — — 51 Commercial construction Pass 16,726 115,057 58,048 — — — 1,393 — 191,224 Special mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total commercial construction 16,726 115,057 58,048 — — — 1,393 — 191,224 YTD gross charge-offs — — — — — — — — — Residential real estate Accrual 122,166 436,709 486,044 203,962 40,500 245,104 164,522 1,454 1,700,461 Non-accrual — — — 132 188 7,430 201 — 7,951 Total residential real estate 122,166 436,709 486,044 204,094 40,688 252,534 164,723 1,454 1,708,412 YTD gross charge-offs — — — — — — — — — Consumer Accrual 7,274 6,049 2,536 1,219 4,451 1,662 1,015 — 24,206 Non-accrual — 2 — 1 22 10 6 — 41 Total Consumer 7,274 6,051 2,536 1,220 4,473 1,672 1,021 — 24,247 YTD gross charge-offs — 10 4 14 14 28 — — 70 Total loans before basis adjustment $ 324,001 $ 1,444,425 $ 1,097,808 $ 522,097 $ 324,236 $ 774,206 $ 236,089 $ 1,454 $ 4,724,316 Total YTD gross charge-offs $ 5 $ 28 $ 18 $ 19 $ 22 $ 2,947 $ — $ — $ 3,039 The following table summarizes the Company’s loan portfolio by credit quality indicator and loan portfolio segment as of December 31, 2022: Revolving Revolving Loans Loans Converted Term Loans at Amortized Cost by Origination Year Amortized to Term 2022 2021 2020 2019 2018 Prior Cost Loans Total (in thousands) As of December 31, 2022 Commercial real estate Pass $ 817,320 $ 441,277 $ 241,700 $ 254,221 $ 121,351 $ 340,634 $ — $ — $ 2,216,503 Special mention — — — 9,328 22,474 — — — 31,802 Substandard — — — — — 2,039 — — 2,039 Doubtful — — — — — — — — — Total commercial real estate 817,320 441,277 241,700 263,549 143,825 342,673 — — 2,250,344 Commercial and industrial Pass 53,078 95,600 82,170 26,568 37,358 50,500 76,647 — 421,921 Special mention — — — — 49 92 492 — 633 Substandard — 4 3 — 1 323 — — 331 Doubtful — — — — — 1,340 50 — 1,390 Total commercial and industrial 53,078 95,604 82,173 26,568 37,408 52,255 77,189 — 424,275 Commercial construction Pass 88,173 87,569 11,769 9,174 318 1,487 821 — 199,311 Special mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total commercial construction 88,173 87,569 11,769 9,174 318 1,487 821 — 199,311 Residential real estate Accrual 443,034 507,679 211,429 42,314 25,232 239,677 154,038 1,568 1,624,971 Non-accrual — 203 140 201 1,258 7,411 96 39 9,348 Total residential real estate 443,034 507,882 211,569 42,515 26,490 247,088 154,134 1,607 1,634,319 Consumer Accrual 9,948 3,588 1,971 16,955 6,122 1,733 1,034 — 41,351 Non-accrual 1 — — 28 20 17 4 — 70 Total Consumer 9,949 3,588 1,971 16,983 6,142 1,750 1,038 — 41,421 Total loans $ 1,411,554 $ 1,135,920 $ 549,182 $ 358,789 $ 214,183 $ 645,253 $ 233,182 $ 1,607 $ 4,549,670

MORTGAGE LOAN SERVICING

MORTGAGE LOAN SERVICING	9 Months Ended
MORTGAGE LOAN SERVICING	Sep. 30, 2023
MORTGAGE LOAN SERVICING
MORTGAGE LOAN SERVICING	5. MORTGAGE LOAN SERVICING The Company sells residential mortgages to government-sponsored enterprises and other parties. The Company retains no beneficial interests in these loans, but it may retain the servicing rights of the loans sold. Mortgage loans serviced for others are not included in the accompanying unaudited interim Consolidated Balance Sheets. The risks inherent in MSRs relate primarily to changes in prepayments that generally result from shifts in mortgage interest rates. The unpaid principal balance of mortgage loans serviced for others was $3.59 billion and $3.62 billion as of September 30, 2023 and December 31, 2022. The Company accounts for MSRs at fair value. The Company obtains and reviews valuations from an independent third party to determine the fair value of MSRs. Key assumptions used in the estimation of fair value include prepayment speeds, discount rates, and default rates September 30, December 31, 2023 2022 Prepayment speed 7.20 % 7.10 % Discount rate 10.03 9.81 Default rate 1.68 1.63 The following summarizes changes to MSRs for the three and nine months ended September 30, 2023 and 2022: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Balance, beginning of period $ 48,176 $ 47,130 $ 48,138 $ 38,268 Additions 900 915 2,194 3,630 Changes in fair value due to: Reductions from loans paid off during the period (644) (747) (1,494) (2,351) Changes in valuation inputs or assumptions 769 2,563 363 10,314 Balance, end of period $ 49,201 $ 49,861 $ 49,201 $ 49,861 Contractually specified servicing fees, net of subservicing expense, included in other mortgage banking income amounted to $1.9 million and $5.8 million for the three and nine months ended September 30, 2023 and $2.0 million and $6.1 million for the three and nine months ended September 30, 2022.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	9 Months Ended
GOODWILL AND OTHER INTANGIBLE ASSETS	Sep. 30, 2023
GOODWILL AND OTHER INTANGIBLE ASSETS
GOODWILL AND OTHER INTANGIBLE ASSETS	6. GOODWILL AND OTHER INTANGIBLE ASSETS There were no changes in the carrying value of goodwill for the periods ended September 30, 2023 and December 31, 2022. The Bank and HarborOne Mortgage are identified as reporting units for purposes of goodwill impairment testing. At September 30, 2023 and December 31, 2022, the carrying value of the Bank’s goodwill was $59.0 million as of both dates, and the carrying value of HarborOne Mortgage’s goodwill was $10.8 million as of both dates. Goodwill is tested for impairment annually on October 31 or on an interim basis if an event triggering impairment may have occurred. As of September 30, 2023, the Company assessed whether there were additional events or changes in circumstances since its annual goodwill impairment test that would indicate that it was more likely than not that the fair value of the reporting unit was less than the reporting unit’s carrying amounts that would require an interim impairment assessment after October 31, 2022. The Company determined there had been no such indicators, therefore, no interim goodwill impairment assessment as of September 30, 2023 was performed. The process of evaluating fair value is highly subjective and requires significant judgment and estimates. The goodwill at the Bank and HarborOne Mortgage is at risk of future impairment if projected operating results are not met or other inputs into the fair value measurement model change. If concerns persist in the banking sector as a result of the recent bank failures, management may determine a triggering event has occurred, which would cause us to perform an interim impairment test. Interim impairment tests at the Bank or HarborOne Mortgage may result in an impairment charge being recorded in the period. Other intangible assets were $1.7 million and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. The Company determined that there was no triggering event that warranted an interim impairment test at September 30, 2023.

DEPOSITS

DEPOSITS	9 Months Ended
DEPOSITS	Sep. 30, 2023
DEPOSITS
DEPOSITS	7. DEPOSITS A summary of deposit balances, by type, is as follows: September 30, December 31, 2023 2022 (in thousands) NOW and demand deposit accounts $ 997,988 $ 1,060,268 Regular savings and club accounts 1,324,635 1,468,172 Money market deposit accounts 951,128 861,704 Total non-certificate accounts 3,273,751 3,390,144 Term certificate accounts greater than $250,000 248,736 110,360 Term certificate accounts less than or equal to $250,000 610,530 387,615 Brokered deposits 276,941 301,380 Total certificate accounts 1,136,207 799,355 Total deposits $ 4,409,958 $ 4,189,499 Total municipal deposits included in the table amounted to $493.4 million at September 30, 2023 and $413.5 million at December 31, 2022. Municipal deposits are generally required to be fully insured. The Company provided supplemental insurance for municipal deposits through DIF, a reciprocal deposit program, or letters of credit offered by the FHLB. DIF was exited February 24, 2023 and will generally provide coverage until February 24, 2024 on deposits that existed at the exit date. The Company has established a relationship to participate in a reciprocal deposit program with other financial institutions. The reciprocal deposit program provides access to FDIC-insured deposit products in aggregate amounts exceeding the current limits for depositors. At September 30, 2023 and December 31, 2022, total reciprocal deposits were $177.3 million and $28.6 million, respectively, consisting of non-certificate accounts. A summary of certificate accounts by maturity at September 30, 2023 is as follows: Weighted Average Amount Rate (dollars in thousands) Within 1 year $ 1,079,547 4.19 % Over 1 year to 2 years 27,003 2.01 Over 2 years to 3 years 26,809 3.06 Over 3 years to 4 years 2,467 0.73 Over 4 years to 5 years 381 2.58 Total certificate deposits 1,136,207 4.10 %

BORROWINGS

BORROWINGS	9 Months Ended
BORROWINGS	Sep. 30, 2023
BORROWINGS
BORROWINGS	8. Borrowed funds at September 30, 2023 and December 31, 2022 consisted of FHLB advances. Short-term advances were $250.0 million and $385.0 million with a weighted average rate of 5.52% and 4.32%, at September 30, 2023 and December 31, 2022, respectively. Long-term advances are summarized by maturity date below. September 30, 2023 December 31, 2022 Amount by Weighted Amount by Weighted Scheduled Amount by Average Scheduled Average Maturity* Call Date (1) Rate (2) Maturity* Rate (2) (dollars in thousands) Year ending December 31: 2023 $ — $ 90,000 — % $ 180 1.40 % 2024 13,400 33,400 1.39 13,400 1.39 2025 60,987 60,987 4.32 987 — 2026 100,000 40,000 4.28 — — 2027 — — — — — 2028 and thereafter 51,083 1,083 3.81 1,108 2.00 $ 225,470 $ 225,470 4.01 % $ 15,675 1.35 % * Includes an amortizing advance requiring monthly principal and interest payments. (1) (2) The FHLB advances are secured by a blanket security agreement which requires the Bank to maintain certain qualifying assets as collateral, principally residential mortgage loans and commercial real estate loans held in the Bank’s portfolio. The carrying value of the loans pledged as collateral for these borrowings totaled $2.01 billion at September 30, 2023 and $1.71 billion at December 31, 2022. As of September 30, 2023, the Company had $830.7 million of available borrowing capacity with the FHLB. The Company also has additional borrowing capacity under a $25.0 million unsecured federal funds line with a correspondent bank and a secured line of credit with the FRBB, secured by 69% of the carrying value of commercial loans with principal balances amounting to $99.1 million and $100.2 million at September 30, 2023 and December 31, 2022, respectively. No amounts were outstanding under either line at September 30, 2023 or December 31, 2022. On March 12, 2023, the Federal Reserve announced the creation of the BTFP. The BTFP offers loans of up to one year to banks, savings associations, credit unions, and other eligible depository institutions pledging U.S. Treasury securities, agency debt and mortgage-backed securities, and other qualifying assets as collateral. These assets are valued at par for purposes of the collateral pledge under the BTFP. The Company has $360.9 million in borrowing capacity under this program, and no amounts were outstanding at September 30, 2023. On August 30, 2018, the Company issued $35.0 million in fixed-to-floating-rate subordinated notes due 2028 in a private placement to institutional accredited investors. On October 19, 2023, the Company notified holders of the Notes that the Company had exercised its option to redeem the Notes in full, effective December 1, 2023. The current interest rate on the Notes is 8.45% . The Notes are carried on the Consolidated Balance Sheets net of unamortized issuance costs of $620,000 and $715,000 at September 30, 2023 and December 31, 2022, respectively.

OTHER COMMITMENTS AND CONTINGEN

OTHER COMMITMENTS AND CONTINGENCIES	9 Months Ended
OTHER COMMITMENTS AND CONTINGENCIES	Sep. 30, 2023
OTHER COMMITMENTS AND CONTINGENCIES
OTHER COMMITMENTS AND CONTINGENCIES	9. OTHER COMMITMENTS AND CONTINGENCIES ACL on Unfunded Commitments The ACL on unfunded commitments amounted to $4.2 million and $5.5 million at September 30, 2023 and 2022, respectively. The activity in the ACL on unfunded commitments for the three and nine months ended September 30, 2023 and 2022 is presented below: Residential Commercial Commercial Commercial Real Estate Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2023 $ 272 $ 490 $ 3,180 $ 870 $ 19 $ 4,831 Provision (4) (17) (603) 41 (3) (586) Balance at September 30, 2023 $ 268 $ 473 $ 2,577 $ 911 $ 16 $ 4,245 Balance at June 30, 2022 $ 337 $ 482 $ 3,638 $ 624 $ 15 $ 5,096 Provision (7) 29 135 253 (4) 406 Balance at September 30, 2022 $ 330 $ 511 $ 3,773 $ 877 $ 11 $ 5,502 Residential Commercial Commercial Commercial Real Estate Real Estate Construction and Industrial Consumer Total (in thousands) Balance at December 31, 2022 $ 336 $ 628 $ 3,079 $ 870 $ 14 $ 4,927 Provision (68) (155) (502) 41 2 (682) Balance at September 30, 2023 $ 268 $ 473 $ 2,577 $ 911 $ 16 $ 4,245 Balance at December 31, 2021 $ — $ — $ — $ — $ — $ — Adoption of Topic 326 318 380 2,561 658 14 3,931 Provision 12 131 1,212 219 (3) 1,571 Balance at September 30, 2022 $ 330 $ 511 $ 3,773 $ 877 $ 11 $ 5,502 Loan Commitments The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and advance funds on various lines of credit. Those commitments involve, to varying degrees, elements of credit and interest-rate risk in excess of the amount recognized in the accompanying unaudited interim Consolidated Financial Statements. The Company’s exposure to credit loss is represented by the contractual amount of these commitments. The Company uses the same credit policies in making commitments as it does for on-balance sheet instruments. The following off-balance sheet financial instruments were outstanding at September 30, 2023 and December 31, 2022. The contract amounts represent credit risk. September 30, December 31, 2023 2022 (in thousands) Commitments to grant residential real estate loans-HarborOne Mortgage $ 52,370 $ 57,916 Commitments to grant other loans 63,777 43,700 Unadvanced funds on home equity lines of credit 255,391 251,759 Unadvanced funds on revolving lines of credit 318,427 351,382 Unadvanced funds on construction loans 226,626 262,945 Commitments to extend credit and unadvanced portion of construction loans are agreements to lend to a customer, as long as there is no violation of any condition established in the contract. Commitments to grant loans generally have fixed expiration dates or other termination clauses and may require payment of a fee. The commitments for unadvanced funds on construction loans and home equity and revolving lines of credit may expire without being drawn upon; therefore, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s credit-worthiness on a case-by-case basis. Commitments to grant loans, and unadvanced construction loans and home equity lines of credit are collateralized by real estate, while revolving lines of credit are unsecured.

DERIVATIVES

DERIVATIVES	9 Months Ended
DERIVATIVES	Sep. 30, 2023
DERIVATIVES
DERIVATIVES	10. DERIVATIVES The Company’s derivative financial instruments are used to manage differences in the amount, timing and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally to manage the Company’s interest-rate risk. Additionally, the Company enters into interest rate derivatives to accommodate the business requirements of its customers. All derivatives are recognized as either assets or liabilities on the balance sheet and are measured at fair value. The accounting for changes in the fair value of a derivative instrument depends upon whether or not it qualifies as a hedge for accounting purposes, and further, by the type of hedging relationship. Derivatives Designated as Hedging Instruments Fair Value Hedge As of September 30, 2023, the Company had two interest rate swap agreements with a notional amount of $100.0 million that were designated as a fair value hedge of fixed-rate residential mortgages. The hedges were determined to be effective during the three months ended September 30, 2023, and the Company expects the hedges to remain effective during the remaining terms of the swaps. The following amounts were recorded on the Consolidated Balance Sheets related to cumulative basis adjustment for fair value hedges as of the dates indicated: Cumulative Amount of Fair Value Hedging Adjustment Included in the Line Item in the Consolidated Balance Sheets Carrying Amount of the Hedged Carrying Amount of the Hedged in Which the Hedged Item is Included Assets Assets September 30, September 30, September 30, September 30, 2023 2022 2023 2022 (in thousands) Loans held for investment (1) $ 98,538 $ — $ (1,462) $ — Total $ 98,538 $ — $ (1,462) $ — (1) Cashflow Hedge As of September 30, 2023, the Company had one interest rate swap agreement with a notional amount of $100.0 million that was designated as a cashflow hedge of brokered deposits. The interest rate swap agreement has an average maturity of 1.52 years, the current weighted average fixed rate paid is 0.671% , the weighted average 3-month SOFR swap receive rate is 5.507% , and the fair value is $6.9 million. The Company expects approximately $4.8 million related to the cashflow hedge to be reclassified to interest expense, from other comprehensive income, in the next twelve months. Derivatives Not Designated as Hedging Instruments Derivative Loan Commitments- Mortgage loan commitments qualify as derivative loan commitments if the loan that will result from exercise of the commitment will be held for sale upon funding. The Company enters into commitments to fund residential mortgage loans at specified times in the future, with the intention that these loans will subsequently be sold in the secondary market. A mortgage loan commitment binds the Company to lend funds to a potential borrower at a specified interest rate and within a specified period of time, generally up to 60 days after inception of the rate lock. Outstanding derivative loan commitments expose the Company to the risk that the price of the loans arising from exercise of the loan commitment might decline from inception of a rate lock to funding of the loan due to increases in mortgage interest rates. If interest rates increase, the value of these loan commitments decreases. Conversely, if interest rates decrease, the value of these loan commitments increases. Forward Loan Sale Commitments With a “mandatory delivery” contract, the Company commits to deliver a certain principal amount of mortgage loans to an investor at a specified price on or before a specified date. If the Company fails to deliver the number of mortgages necessary to fulfill the commitment by the specified date, it is obligated to pay a “pair-off” fee, based on then-current market prices, to the investor to compensate the investor for the shortfall. With a “best efforts” contract, the Company commits to deliver an individual mortgage loan of a specified principal amount and quality to an investor if the loan to the underlying borrower closes. Generally, the price the investor will pay the seller for an individual loan is specified prior to the loan being funded (e.g., on the same day the lender commits to lend funds to a potential borrower). The Company expects that these forward loan sale commitments will experience changes in fair value opposite to the change in fair value of derivative loan commitments. Interest Rate Swaps Risk Participation Agreements The following table presents the outstanding notional balances and fair values of outstanding derivative instruments: Assets Liabilities Notional Fair Fair Amount Value Value (in thousands) September 30, 2023: Derivatives designated as hedging instruments Fair value hedge - interest rate swaps $ 100,000 $ 1,463 $ — Cashflow hedge - interest rate swaps 100,000 6,946 — Total derivatives designated as hedging instruments $ 8,409 $ — Derivatives not designated as hedging instruments Derivative loan commitments $ 40,445 $ 420 $ 111 Forward loan sale commitments 31,000 304 — Interest rate swaps 859,275 33,889 33,889 Risk participation agreements 182,347 — — Total derivatives not designated as hedging instruments $ 34,613 $ 34,000 Total derivatives $ 43,022 $ 34,000 December 31, 2022: Derivatives designated as hedging instruments Cashflow hedge - interest rate swaps $ 100,000 $ 8,314 $ — Total derivatives designated as hedging instruments $ 8,314 $ — Derivatives not designated as hedging instruments Derivative loan commitments $ 27,935 $ 238 $ 65 Forward loan sale commitments 29,000 249 39 Interest rate swaps 772,588 28,525 28,525 Risk participation agreements 164,528 — — Total derivatives not designated as hedging instruments $ 29,012 $ 28,629 Total derivatives $ 37,326 $ 28,629 The following table presents the recorded net gains and losses pertaining to the Company’s derivative instruments: Location of gain (loss) recognized in Three Months Ended September 30, Nine Months Ended September 30, Income 2023 2022 2023 2022 (in thousands) Derivatives designated as fair value hedge Hedged items - loans Interest income $ (1,018) $ — $ (1,462) $ — Interest rate swap contracts Interest income 1,026 — 1,463 — Total $ 8 $ — $ 1 $ — Derivatives not designated as hedging instruments Derivative loan commitments Mortgage banking income $ (129) $ (606) $ 137 $ (874) Forward loan sale commitments Mortgage banking income 45 1,377 94 1,356 Interest rate swaps Other income — — — 330 Total $ (84) $ 771 $ 231 $ 812 The effect of cashflow hedge accounting on accumulated other comprehensive income is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Derivatives designated as hedging instruments (Loss) gain in OCI on derivatives (effective portion), net of tax $ (448) $ 1,610 $ (983) $ 5,038 Gain (loss) reclassified from OCI into interest expense (effective portion) $ 1,221 $ 420 $ 3,373 $ 380 Master netting arrangements provide for a single net settlement of all swap agreements, as well as collateral or cash funds, in the event of default on, or termination of, any one contract. Collateral is provided by cash or securities received or posted by the counterparty with net liability positions, respectively, in accordance with contract thresholds. The following table presents the offsetting of derivatives and amounts subject to an enforceable master netting arrangement, not offset in the Consolidated Balance Sheets at September 30, 2023: Gross Amounts Not Offset in the Consolidated Balance Sheets Net Amounts Gross Amounts Gross Amounts Assets (Liabilities) Cash of Recognized Offset in the presented in the Collateral Assets Consolidated Consolidated Financial (Received) Net (Liabilities) Balance Sheets Balance Sheets Instruments Posted Amount (in thousands) Derivatives designated as hedging instruments Interest rate swap on deposits $ 6,946 $ — $ 6,946 $ — $ (6,946) $ — Interest rate swap on residential real estate loans $ 1,463 $ — $ 1,463 $ — $ — $ 1,463 Derivatives not designated as hedging instruments Customer interest rate swaps $ 33,824 $ — $ 33,824 $ — $ (37,054) $ (3,230)

OPERATING LEASE ROU ASSETS AND

OPERATING LEASE ROU ASSETS AND LIABILITIES	9 Months Ended
OPERATING LEASE ROU ASSETS AND LIABILITIES	Sep. 30, 2023
OPERATING LEASE ROU ASSETS AND LIABILITIES
OPERATING LEASE ROU ASSETS AND LIABILITIES	11. OPERATING LEASE ROU ASSETS AND LIABILITIES Operating lease ROU assets, included in other assets, were $23.5 million and $26.9 million at September 30, 2023 and December 31, 2022, respectively. Operating lease liabilities, included in other liabilities and accrued expenses , were $25.2 million and $28.6 million at September 30, 2023 and December 31, 2022, respectively. As of September 30, 2023 and December 31, 2022 there were no leases that had not yet commenced. At September 30, 2023, lease expiration dates ranged from two months to 34.9 years and have a weighted average remaining lease term of 16.3 years. At December 31, 2022 , lease expiration dates ranged from three months to 35.7 years and had a weighted average remaining lease term of 17.3 years. Future minimum lease payments under non-cancellable leases as of September 30, 2023 September 30, 2023 (in thousands) 2023 $ 760 2024 2,827 2025 2,552 2026 2,505 2027 2,445 Thereafter 19,421 Total lease payments 30,510 Imputed interest (5,347) Total present value of operating lease liabilities $ 25,163 The weighted-average discount rate and remaining lease term for operating leases were as follows: September 30, 2023 December 31, 2022 Weighted-average discount rate 2.08 % 2.02 % Weighted-average remaining lease term (years) 16.25 17.33 Rental expense for operating leases is recognized on a straight-line basis over the lease term. Variable lease components, such as fair-market value adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. The following table presents the components of total lease expense: Three Months Ended Nine Months Ended September 30, September 30, 2023 2022 2023 2022 (in thousands) Lease Expense: Operating lease expense $ 766 $ 836 $ 2,365 $ 2,472 Short-term lease expense 40 37 105 105 Variable lease expense 5 — 10 — Sublease income (3) (4) (12) (9) Total lease expense $ 808 $ 869 $ 2,468 $ 2,568 Other Information Cash paid for amounts included in the measurement of lease liabilities- operating cash flows for operating leases 768 845 2,382 2,446 Operating Lease - Operating cash flows (Liability reduction) 640 701 1,975 2,041 ROU assets obtained in exchange for new operating lease liabilities — 77 596 1,160

MINIMUM REGULATORY CAPITAL REQU

MINIMUM REGULATORY CAPITAL REQUIREMENTS	9 Months Ended
MINIMUM REGULATORY CAPITAL REQUIREMENTS	Sep. 30, 2023
MINIMUM REGULATORY CAPITAL REQUIREMENTS
MINIMUM REGULATORY CAPITAL REQUIREMENTS	12. The Company and the Bank are subject to various regulatory capital requirements administered by the Federal Reserve and the FDIC. Failure to meet minimum capital requirements can result in mandatory and possible additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s Consolidated Financial Statements. Under the capital rules, risk-based capital ratios are calculated by dividing Tier 1, common equity Tier 1, and total risk-based capital, respectively, by risk-weighted assets. Assets and off-balance sheet credit equivalents are assigned to one of several risk-weight categories, based primarily on relative risk. The rules require banks and bank holding companies to maintain a minimum common equity Tier 1 capital ratio of 4.5%, a minimum Tier 1 capital ratio of 6.0% and a total capital ratio of 8.0%. In addition, a Tier 1 leverage ratio of 4.0% is required. Additionally, the capital rules require a bank holding company to maintain a capital conservation buffer of common equity Tier 1 capital in an amount above the minimum risk-based capital requirements equal to 2.5% of total risk weighted assets, or face restrictions on the ability to pay dividends, pay discretionary bonuses, and to engage in share repurchases. Under the FDIC’s prompt corrective action rules, an insured state nonmember bank is considered “well capitalized” if its capital ratios meet or exceed the ratios as set forth in the following table and is not subject to any written agreement, order, capital directive, or prompt corrective action directive to meet and maintain a specific capital level for any capital measure. The Bank must meet well capitalized requirements under prompt corrective action provisions. Prompt corrective action provisions are not applicable to bank holding companies. A bank holding company is considered “well capitalized” if the bank holding company (i) has a total risk-based capital ratio of at least 10.0%, (ii) has a Tier 1 risk-based capital ratio of at least 6.0%, and (iii) is not subject to any written agreement order, capital directive or prompt corrective action directive to meet and maintain a specific capital level for any capital measure. At September 30, 2023, the capital levels of both the Company and the Bank exceeded all regulatory capital requirements and their regulatory capital ratios were above the minimum levels required to be considered well capitalized for regulatory purposes. The capital levels of both the Company and the Bank at September 30, 2023 also exceeded the minimum capital requirements, including the currently applicable capital conservation buffer of 2.5%. The Company’s and the Bank’s actual regulatory capital ratios as of September 30, 2023 and December 31, 2022 are presented in the table below. Minimum Required to be Considered "Well Capitalized" Minimum Required for Under Prompt Corrective Actual Capital Adequacy Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) HarborOne Bancorp, Inc. September 30, 2023 Common equity Tier 1 capital to risk-weighted assets $ 570,586 12.0 % $ 213,499 4.5 % N/A N/A Tier 1 capital to risk-weighted assets 570,586 12.0 284,665 6.0 N/A N/A Total capital to risk-weighted assets 651,143 13.7 379,554 8.0 N/A N/A Tier 1 capital to average assets 570,586 10.1 224,874 4.0 N/A N/A December 31, 2022 Common equity Tier 1 capital to risk-weighted assets $ 592,610 12.8 % $ 208,541 4.5 % N/A N/A Tier 1 capital to risk-weighted assets 592,610 12.8 278,054 6.0 N/A N/A Total capital to risk-weighted assets 677,774 14.6 370,739 8.0 N/A N/A Tier 1 capital to average assets 592,610 11.5 205,897 4.0 N/A N/A HarborOne Bank September 30, 2023 Common equity Tier 1 capital to risk-weighted assets $ 543,025 11.5 % $ 213,410 4.5 % $ 308,259 6.5 % Tier 1 capital to risk-weighted assets 543,025 11.5 284,547 6.0 379,396 8.0 Total capital to risk-weighted assets 595,582 12.6 379,396 8.0 474,245 10.0 Tier 1 capital to average assets 543,025 9.7 224,848 4.0 281,060 5.0 December 31, 2022 Common equity Tier 1 capital to risk-weighted assets $ 525,522 11.3 % $ 208,447 4.5 % $ 301,090 6.5 % Tier 1 capital to risk-weighted assets 525,522 11.3 277,929 6.0 370,572 8.0 Total capital to risk-weighted assets 575,686 12.4 370,572 8.0 463,215 10.0 Tier 1 capital to average assets 525,522 10.2 205,874 4.0 257,342 5.0

COMPREHENSIVE (LOSS) INCOME

COMPREHENSIVE (LOSS) INCOME	9 Months Ended
COMPREHENSIVE (LOSS) INCOME	Sep. 30, 2023
COMPREHENSIVE (LOSS) INCOME
COMPREHENSIVE (LOSS) INCOME	13. Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities are reported as a separate component of the stockholders’ equity section of the Consolidated Balance Sheets, such items, along with net income, are components of comprehensive income (loss). The following table presents changes in accumulated other comprehensive (loss) income by component for the three and nine months ended September 30, 2023 and 2022: Three Months Ended September 30, 2023 2022 Available Cash Available Cash Postretirement for Sale Flow for Sale Flow Benefit Securities Hedge Total Securities Hedge Total (in thousands) Balance at beginning of period $ 112 $ (51,847) $ 5,445 $ (46,290) $ (38,892) $ 4,625 $ (34,267) Other comprehensive income (loss) before reclassifications — (14,718) 598 (14,120) (20,554) 2,658 (17,896) Amounts reclassified from accumulated other comprehensive (loss) income (20) — (1,221) (1,241) — (420) (420) Net current period other comprehensive (loss) income (20) (14,718) (623) (15,361) (20,554) 2,238 (18,316) Related tax effect — 4,487 175 4,662 4,530 (628) 3,902 Balance at end of period $ 92 $ (62,078) $ 4,997 $ (56,989) $ (54,916) $ 6,235 $ (48,681) Nine Months Ended September 30, 2023 2022 Available Cash Available Cash Postretirement for Sale Flow for Sale Flow Benefit Securities Hedge Total Securities Hedge Total (in thousands) Balance at beginning of period $ 150 $ (53,212) $ 5,980 $ (47,082) $ (2,834) $ 1,197 $ (1,637) Other comprehensive (loss) income before reclassifications 1 (12,995) 2,005 (10,989) (66,806) 7,386 (59,420) Amounts reclassified from accumulated other comprehensive income (loss) (59) — (3,373) (3,432) — (380) (380) Net current period other comprehensive (loss) income (58) (12,995) (1,368) (14,421) (66,806) 7,006 (59,800) Related tax effect — 4,129 385 4,514 14,724 (1,968) 12,756 Balance at end of period $ 92 $ (62,078) $ 4,997 $ (56,989) $ (54,916) $ 6,235 $ (48,681)

FAIR VALUE OF ASSETS AND LIABIL

FAIR VALUE OF ASSETS AND LIABILITIES	9 Months Ended
FAIR VALUE OF ASSETS AND LIABILITIES	Sep. 30, 2023
FAIR VALUE OF ASSETS AND LIABILITIES
FAIR VALUE OF ASSETS AND LIABILITIES	14. FAIR VALUE OF ASSETS AND LIABILITIES Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values: •Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. •Level 2 – Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. •Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. The following methods and assumptions were used by the Company in estimating fair value disclosures: Debt Securities Level 2 debt securities are traded less frequently than exchange-traded instruments. The fair value of these securities is determined using matrix pricing with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. This category includes obligations of U.S. government-sponsored enterprises, including mortgage-backed securities, individual name issuer trust preferred debt securities and corporate bonds. Debt securities not actively traded whose fair value is determined through the use of cash flows utilizing inputs that are unobservable are classified as Level 3. There were no Level 3 securities held at September 30, 2023 and December 31, 2022. Loans held for sale Collateral-Dependent Impaired Loans Appraisals for collateral-dependent impaired loans are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, the Company reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. Retirement plan annuities MSRs Deposits and mortgagors’ escrow accounts Borrowed funds Accrued interest Derivatives Derivatives designated as hedging instrument Forward loan sale commitments and derivative loan commitments Interest rate swaps and risk participation agreements Although the Company has determined that the majority of the inputs used to value its interest rate swaps and risk participation agreements fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with interest rate contracts and risk participation agreements utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. As of September 30, 2023 and December 31, 2022, the Company assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of its derivatives. As a result, the Company classified its derivative valuations in their entirety as Level 2. Off-balance sheet credit-related instruments Transfers between levels are recognized at the end of the reporting period, if applicable. There were no transfers during the periods presented. Assets and Liabilities Measured at Fair Value on a Recurring Basis Assets and liabilities measured at fair value on a recurring basis are summarized below: Total Level 1 Level 2 Level 3 Fair Value (in thousands) September 30, 2023 Assets Securities available for sale $ — $ 271,078 $ — $ 271,078 Loans held for sale — 17,796 — 17,796 Mortgage servicing rights — 49,201 — 49,201 Derivatives — 42,298 724 43,022 $ — $ 380,373 $ 724 $ 381,097 Liabilities Derivatives $ — $ 33,889 $ 111 $ 34,000 December 31, 2022 Assets Securities available for sale $ — $ 301,149 $ — $ 301,149 Loans held for sale — 18,544 — 18,544 Mortgage servicing rights — 48,138 — 48,138 Derivatives — 36,839 487 37,326 $ — $ 404,670 $ 487 $ 405,157 Liabilities Derivatives $ — $ 28,525 $ 104 $ 28,629 The table below presents, for the three and nine months ended September 30, 2023 and 2022, the changes in Level 3 assets and liabilities that are measured at fair value on a recurring basis. Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Assets: Derivative and Forward Loan Sale Commitments: Balance at beginning of period $ 783 $ 1,344 $ 487 $ 1,583 Total gains (losses) included in net income (1) (59) 891 237 652 Balance at end of period $ 724 $ 2,235 $ 724 $ 2,235 Changes in unrealized gains relating to instruments at period end $ 724 $ 2,235 $ 724 $ 2,235 Liabilities: Derivative and Forward Loan Sale Commitments: Balance at beginning of period $ (85) $ (239) $ (104) $ (189) Total gains (losses) included in net income (1) (26) (120) (7) (170) Balance at end of period $ (111) $ (359) $ (111) $ (359) Changes in unrealized losses relating to instruments at period end $ (111) $ (359) $ (111) $ (359) (1) Included in mortgage banking income on the Consolidated Statements of Income. Assets Measured at Fair Value on a Non-recurring Basis The Company is required, on a non-recurring basis, to adjust the carrying value or provide valuation allowances for certain assets using fair value measurements in accordance with GAAP. The following is a summary of applicable non-recurring fair value measurements. There are no liabilities measured at fair value on a non-recurring basis. September 30, December 31, 2023 2022 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (in thousands) Collateral-dependent impaired loans $ — $ — $ 7,340 $ — $ — $ 349 Losses in the following table represent the amount of the fair value adjustments recorded during the period on the carrying value of the assets held at September 30, 2023 and December 31, 2022, respectively. Losses on fully charged off loans are not included in the table. Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Collateral-dependent impaired loans $ 178 $ 92 $ 3,116 $ 840 The table below presents quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a nonrecurring basis at the dates indicated. Fair Value September 30, December 31, Valuation Technique 2023 2022 (in thousands) Collateral-dependent impaired loans $ 7,340 $ 349 Sales Comparison Approach (1) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which includes unobservable inputs such as adjustments for differences between the comparable sales. The Company may also use another source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Appraisals may be adjusted by Management for qualitative factors and estimated liquidation expenses. Generally, appraisals for residential real estate and commercial real estate loan are discounted 20% . Commercial and industrial appraisals are generally discounted 25% - 50% . Management may take larger discounts to reflect market liquidity for certain types of assets not addressed in the appraisals. Summary of Fair Values of Financial Instruments The estimated fair values, and related carrying or notional amounts, of the Company’s financial instruments are as follows. Certain financial instruments and all nonfinancial instruments are exempt from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein may not necessarily represent the underlying fair value of the Company. September 30, 2023 Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (in thousands) Financial assets: Cash and cash equivalents $ 246,784 $ 246,784 $ — $ — $ 246,784 Securities available for sale 271,078 — 271,078 — 271,078 Securities held to maturity 19,795 — 18,683 — 18,683 Federal Home Loan Bank stock 23,378 N/A N/A N/A N/A Loans held for sale 17,796 — 17,796 — 17,796 Loans, net 4,674,542 — — 4,451,754 4,451,754 Retirement plan annuities 15,023 — — 15,023 15,023 Accrued interest receivable 17,506 — 17,506 — 17,506 Derivatives 43,022 — 42,298 724 43,022 Financial liabilities: Deposits 4,409,958 — — 4,389,434 4,389,434 Borrowed funds 475,470 — 472,875 — 472,875 Subordinated debt 34,380 — — 34,099 34,099 Mortgagors' escrow accounts 10,155 — — 10,155 10,155 Accrued interest payable 4,623 — 4,623 — 4,623 Derivatives 34,000 — 33,889 111 34,000 December 31, 2022 Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (in thousands) Financial assets: Cash and cash equivalents $ 98,017 $ 98,017 $ — $ — $ 98,017 Securities available for sale 301,149 — 301,149 — 301,149 Securities held to maturity 19,949 — 19,274 — 19,274 Federal Home Loan Bank stock 20,071 N/A N/A N/A N/A Loans held for sale 18,544 — 18,544 — 18,544 Loans, net 4,504,434 — — 4,383,613 4,383,613 Retirement plan annuities 14,630 — — 14,630 14,630 Accrued interest receivable 15,139 — 15,139 — 15,139 Derivatives 37,326 — 36,839 487 37,326 Financial liabilities: Deposits 4,189,499 — — 4,166,796 4,166,796 Borrowed funds 400,675 — 399,655 — 399,655 Subordinated debt 34,285 — — 28,221 28,221 Mortgagors' escrow accounts 9,537 — — 9,537 9,537 Accrued interest payable 2,325 — 2,325 — 2,325 Derivatives 28,629 — 28,525 104 28,629

EARNINGS PER SHARE

EARNINGS PER SHARE	9 Months Ended
EARNINGS PER SHARE	Sep. 30, 2023
EARNINGS PER SHARE
EARNINGS PER SHARE	15. EARNINGS PER SHARE Basic EPS represents net income attributable to common shareholders divided by the weighted-average number of common shares outstanding during the period. Non-vested restricted shares that are participating securities are included in the computation of basic EPS. Diluted EPS is computed by dividing net income attributable to common shareholders by the weighted-average number of common shares outstanding, plus the effect of potential dilutive common stock equivalents outstanding during the period. At September 30, 2023 and 2022, respectively, potential common shares of 1,193,036 and 4,255 were considered to be anti-dilutive and excluded from EPS. The following table presents earnings per common share. Three Months Ended September 30, 2023 2022 Net income available to common stockholders (in thousands) $ 8,412 $ 13,758 Average number of common shares outstanding 46,369,111 49,626,152 Less: Average unallocated ESOP shares and non-vested restricted shares (3,492,218) (3,795,415) Weighted average number of common shares outstanding used to calculate basic earnings per common share 42,876,893 45,830,737 Dilutive effect of share-based compensation 106,584 589,790 Weighted average number of common shares outstanding used to calculate diluted earnings per common share 42,983,477 46,420,527 Earnings per common share: Basic $ 0.20 $ 0.30 Diluted $ 0.20 $ 0.30 Nine Months Ended September 30, 2023 2022 Net income available to common stockholders (in thousands) $ 23,188 $ 36,012 Average number of common shares outstanding 47,133,894 50,738,918 Less: Average unallocated ESOP shares and non-vested restricted shares (3,541,940) (3,863,606) Weighted average number of common shares outstanding used to calculate basic earnings per common share 43,591,954 46,875,312 Dilutive effect of share-based compensation 201,183 666,335 Weighted average number of common shares outstanding used to calculate diluted earnings per common share 43,793,137 47,541,647 Earnings per common share: Basic $ 0.53 $ 0.77 Diluted $ 0.53 $ 0.76

REVENUE RECOGNITION

REVENUE RECOGNITION	9 Months Ended
REVENUE RECOGNITION	Sep. 30, 2023
REVENUE RECOGNITION
REVENUE RECOGNITION	16. REVENUE RECOGNITION Revenue from contracts with customers in the scope of ASC Topic 606 is measured based on the consideration specified in the contract with a customer and excludes amounts collected on behalf of third parties. The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company’s performance obligations are generally satisfied as services are rendered and can either be satisfied at a point in time or over time. Unsatisfied performance obligations at the report date are not material to our Consolidated Financial Statements. In certain cases, other parties are involved with providing services to our customers. If the Company is a principal in the transaction (providing services itself or through a third party on its behalf), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (referring to another party to provide services), the Company reports its net fee or commission retained as revenue. The Company recognizes revenue that is transactional in nature and such revenue is earned at a point in time. Revenue that is recognized at a point in time includes card interchange fees (fee income related to debit card transactions), ATM fees, wire transfer fees, overdraft charge fees, and stop-payment and returned check fees. Additionally, revenue is collected from loan fees, such as letters of credit, line renewal fees and application fees. Such revenue is derived from transactional information and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer’s transaction.

SEGMENT REPORTING

SEGMENT REPORTING	9 Months Ended
SEGMENT REPORTING	Sep. 30, 2023
SEGMENT REPORTING
SEGMENT REPORTING	17. SEGMENT REPORTING The Company has two reportable segments: HarborOne Bank and HarborOne Mortgage. Revenue from HarborOne Bank consists primarily of interest earned on loans and investment securities and service charges on deposit accounts. Revenue from HarborOne Mortgage comprises interest earned on loans and fees received as a result of the residential mortgage origination, sale and servicing process. The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies. Segment profit and loss is measured by net income on a legal entity basis. Intercompany transactions are eliminated in consolidation. Information about the reportable segments and reconciliation to the unaudited interim Consolidated Financial Statements at September 30, 2023 and 2022 and for the three and nine months ended September 30, 2023 and 2022 is presented in the tables below. Three Months Ended September 30, 2023 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 31,468 $ 199 $ 31,080 Benefit for credit losses (113) — (113) Net interest and dividend income, after benefit for credit losses 31,581 199 31,193 Mortgage banking income: Gain on sale of mortgage loans — 2,704 2,704 Intersegment gain (loss) (198) 249 — Changes in mortgage servicing rights fair value 18 107 125 Other 188 2,082 2,270 Total mortgage banking income 8 5,142 5,099 Other noninterest income (loss) 6,503 (4) 6,499 Total noninterest income 6,511 5,138 11,598 Noninterest expense 26,272 5,490 31,872 Income (loss) before income taxes 11,820 (153) 10,919 Provision (benefit) for income taxes 2,716 (15) 2,507 Net income (loss) $ 9,104 $ (138) $ 8,412 Nine Months Ended September 30, 2023 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 98,520 $ 646 $ 97,578 Provision for credit losses 5,036 — 5,036 Net interest and dividend income, after provision for credit losses 93,484 646 92,542 Mortgage banking income: Gain on sale of mortgage loans — 8,228 8,228 Intersegment gain (loss) (904) 793 — Changes in mortgage servicing rights fair value (89) (1,042) (1,131) Other 584 6,214 6,798 Total mortgage banking income (loss) (409) 14,193 13,895 Other noninterest income 19,059 (4) 19,055 Total noninterest income 18,650 14,189 32,950 Noninterest expense 78,655 16,305 95,106 Income (loss) before income taxes 33,479 (1,470) 30,386 Provision (benefit) for income taxes 8,024 (348) 7,198 Net income (loss) $ 25,455 $ (1,122) $ 23,188 Total assets at period end $ 5,672,956 $ 113,619 $ 5,664,387 Goodwill at period end $ 59,042 $ 10,760 $ 69,802 Three Months Ended September 30, 2022 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 39,373 $ 437 $ 39,332 Provision for credit losses 668 — 668 Net interest and dividend income, after provision for credit losses 38,705 437 38,664 Mortgage banking income: Gain on sale of mortgage loans — 3,809 3,809 Intersegment gain (loss) (904) 698 — Changes in mortgage servicing rights fair value 164 1,652 1,816 Other 218 2,235 2,453 Total mortgage banking income (loss) (522) 8,394 8,078 Other noninterest income (loss) 6,180 (13) 6,167 Total noninterest income 5,658 8,381 14,245 Noninterest expense 27,707 6,610 34,473 Income before income taxes 16,656 2,208 18,436 Provision for income taxes 4,166 687 4,678 Net income $ 12,490 $ 1,521 $ 13,758 Nine Months Ended September 30, 2022 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 110,043 $ 1,198 $ 109,797 Provision for credit losses 3,552 — 3,552 Net interest and dividend income, after provision for credit losses 106,491 1,198 106,245 Mortgage banking income: Gain on sale of mortgage loans — 13,669 13,669 Intersegment gain (loss) (2,607) 2,632 — Changes in mortgage servicing rights fair value 881 7,082 7,963 Other 670 6,953 7,623 Total mortgage banking income (loss) (1,056) 30,336 29,255 Other noninterest income 18,151 3 18,154 Total noninterest income 17,095 30,339 47,409 Noninterest expense 81,663 21,613 104,262 Income before income taxes 41,923 9,924 49,392 Provision for income taxes 11,273 2,777 13,380 Net income $ 30,650 $ 7,147 $ 36,012 Total assets at period end $ 5,000,963 $ 132,431 $ 4,987,643 Goodwill at period end $ 59,042 $ 10,760 $ 69,802

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Sep. 30, 2023
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The unaudited interim Consolidated Financial Statements of HarborOne Bancorp, Inc. presented herein have been prepared pursuant to the rules of the SEC for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by GAAP. In the opinion of management, all adjustments and disclosures considered necessary for the fair presentation of the accompanying Consolidated Financial Statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements for the years ended December 31, 2022 and 2021 and notes thereto included in the Company’s Annual Report on Form 10-K. The unaudited interim Consolidated Financial Statements include the accounts of the Company; the Company’s subsidiaries, Legion Parkway Company LLC (a security corporation) and HarborOne Bank; and the Bank’s wholly-owned subsidiaries, which consist of HarborOne Mortgage, LLC, HarborOne Security Company, Inc. and a passive investment corporation. The passive investment corporation maintains and manages certain assets of the Bank. The security company was established for the purpose of buying, holding and selling securities on its own behalf. All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year financial statement presentation. These changes and reclassifications did not impact previously reported net income or comprehensive income.
Nature of Operations	Nature of Operations The Company provides a variety of financial services to individuals and businesses through its 30 full-service branches in Massachusetts and Rhode Island, and a commercial lending office in each of Boston, Massachusetts and Providence, Rhode Island. HarborOne Mortgage maintains offices in Florida, Maine, Massachusetts, New Hampshire, New Jersey and Rhode Island and originates loans in five additional states. The Company’s primary deposit products are checking, money market, savings, and term certificate of deposit accounts, while its primary lending products are commercial real estate, commercial, residential mortgages, home equity, and consumer loans. The Company also originates, sells and services residential mortgage loans through HarborOne Mortgage.
Risks and Uncertainties	Risks and Uncertainties During the first quarter of 2023, the banking industry experienced significant volatility with multiple high-profile bank failures and industry-wide concerns related to liquidity, deposit outflows, unrealized securities losses and eroding consumer confidence in the banking system. In response to these events, the Treasury, the Federal Reserve, and the FDIC jointly announced the BTFP on March 12, 2023. This program aims to enhance liquidity by allowing institutions to pledge certain securities at the par value of the securities, and at a borrowing rate of ten basis points over the one-year overnight index swap rate. The BTFP is available to eligible U.S. federally insured depository institutions, with advances having a term of up to one year and no prepayment penalties. Macroeconomic trends are mixed as uncertainty remains about the economy and banking industry. Reliance on secondary funding sources could increase the Company’s overall cost of funds and thereby reduce net income. While the Company believes its current sources of liquidity are adequate to fund operations, there is no guarantee they will suffice to meet future liquidity demands. This may necessitate slowing or discontinuing loan growth, capital expenditures, or other investments, or liquidating assets. Additionally, the Company could experience adverse effects on its business, financial condition, results of operations and cash flows if there is severe or prolonged inflation, a recession, further escalation of the current geopolitical situation, or sustained supply chain disruptions. While asset quality continues to point to economic recovery, the Company’s customers could experience similar adverse effects from these uncertainties that would impair their ability to fulfill their financial obligations to the Company resulting in deteriorating credit quality and loan charge-offs.
Summary of Significant Accounting Policies and Recently Adopted Accounting Standards Updates	Summary of Significant Accounting Policies and Recently Adopted Accounting Standards Updates Significant accounting policies in effect and disclosed within the Company’s most recent audited Consolidated Financial Statements as of December 31, 2022 remain substantially unchanged. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments – Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures” ASU 2022-02 also requires that public business entities disclose current-period gross charge-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, “Financial Instruments—Credit Losses—Measured at Amortized Cost.” The Company adopted ASU 2022-02 effective January 1, 2023 on a modified retrospective basis. The adoption of ASU 2022-02 did not have a material impact on the Company’s Consolidated Financial Statements.

DEBT SECURITIES (Tables)

DEBT SECURITIES (Tables)	9 Months Ended
DEBT SECURITIES (Tables)	Sep. 30, 2023
DEBT SECURITIES
Schedule of securities available for sale and held to maturity	Gross Gross Allowance Amortized Unrealized Unrealized for Credit Fair Cost Gains Losses Losses Value (in thousands) September 30, 2023: Securities available for sale U.S. government and government-sponsored enterprise obligations $ 47,143 $ — $ 9,013 $ — $ 38,130 U.S. government agency and government-sponsored residential mortgage-backed securities 300,266 — 71,774 — 228,492 U.S. government-sponsored collateralized mortgage obligations 2,034 — 102 — 1,932 SBA asset-backed securities 1,885 — 161 — 1,724 Corporate bonds 1,000 — 200 — 800 Total securities available for sale $ 352,328 $ — $ 81,250 $ — $ 271,078 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ 15,000 $ — $ 782 $ — $ 14,218 SBA asset-backed securities 4,795 — 330 — 4,465 Total securities held to maturity $ 19,795 $ — $ 1,112 $ — $ 18,683 Gross Gross Allowance Amortized Unrealized Unrealized for Credit Fair Cost Gains Losses Losses Value (in thousands) December 31, 2022: Securities available for sale U.S. government and government-sponsored enterprise obligations $ 47,143 $ — $ 8,649 $ — $ 38,494 U.S. government agency and government-sponsored residential mortgage-backed securities 315,964 — 59,149 — 256,815 U.S. government-sponsored collateralized mortgage obligations 2,612 — 113 — 2,499 SBA asset-backed securities 2,685 — 190 — 2,495 Corporate bonds 1,000 — 154 — 846 Total securities available for sale $ 369,404 $ — $ 68,255 $ — $ 301,149 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ 15,000 $ — $ 597 $ — $ 14,403 SBA asset-backed securities 4,949 — 78 — 4,871 Total securities held to maturity $ 19,949 $ — $ 675 $ — $ 19,274
Schedule of debt securities by contractual maturity	Available for Sale Held to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (in thousands) After 1 year through 5 years $ 6,998 $ 6,380 $ 15,000 $ 14,218 After 5 years through 10 years 41,145 32,550 — — Over 10 years — — — — 48,143 38,930 15,000 14,218 U.S. government agency and government-sponsored residential mortgage-backed securities 300,266 228,492 — — U.S. government-sponsored collateralized mortgage obligations 2,034 1,932 — — SBA asset-backed securities 1,885 1,724 4,795 4,465 Total $ 352,328 $ 271,078 $ 19,795 $ 18,683
Schedule of securities with continuous losses	Less Than Twelve Months Twelve Months and Over Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (in thousands) September 30, 2023: Securities available for sale U.S. government and government-sponsored enterprise obligations $ — $ — $ 9,013 $ 38,130 U.S. government agency and government-sponsored residential mortgage-backed securities — 34 71,774 228,458 U.S. government-sponsored collateralized mortgage obligations — — 102 1,932 SBA asset-backed securities — — 161 1,724 Corporate bonds — — 200 800 $ — $ 34 $ 81,250 $ 271,044 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ — $ — 782 14,218 SBA asset-backed securities 330 4,465 — — $ 330 $ 4,465 $ 782 $ 14,218 December 31, 2022: Securities available for sale U.S. government and government-sponsored enterprise obligations $ 249 $ 4,751 $ 8,400 $ 33,743 U.S. government agency and government-sponsored residential mortgage-backed securities 3,620 35,214 55,529 221,566 U.S. government-sponsored collateralized mortgage obligations 113 2,499 — — SBA asset-backed securities 190 2,495 — — Corporate bonds 154 846 — — $ 4,326 $ 45,805 $ 63,929 $ 255,309 Securities held to maturity U.S. government and government-sponsored enterprise obligations $ 597 $ 14,403 $ — $ — SBA asset-backed securities 78 4,871 — — $ 675 $ 19,274 $ — $ —

LOANS HELD FOR SALE (Tables)

LOANS HELD FOR SALE (Tables)	9 Months Ended
LOANS HELD FOR SALE (Tables)	Sep. 30, 2023
LOANS HELD FOR SALE
Schedule of fair value and contractual principal balance outstanding of loans held for sale	September 30, December 31, 2023 2022 (in thousands) Loans held for sale, fair value $ 17,796 $ 18,544 Loans held for sale, contractual principal outstanding 17,590 18,208 Fair value less unpaid principal balance $ 206 $ 336

LOANS AND ALLOWANCE FOR CREDI_2

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)	9 Months Ended
LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)	Sep. 30, 2023
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Summary of balances of loans	September 30, December 31, 2023 2022 (in thousands) Residential real estate: One- to four-family $ 1,513,326 $ 1,432,263 Second mortgages and equity lines of credit 174,814 166,219 Residential real estate construction 20,272 35,837 Total residential real estate loans 1,708,412 1,634,319 Commercial: Commercial real estate 2,349,886 2,250,344 Commercial construction 191,224 199,311 Commercial and industrial 450,547 424,275 Total commercial loans 2,991,657 2,873,930 Consumer loans: Auto 15,797 33,625 Personal 8,450 7,796 Total consumer loans 24,247 41,421 Total loans before basis adjustment 4,724,316 4,549,670 Basis adjustment associated with fair value hedge (1) (1,462) — Total loans 4,722,854 4,549,670 Allowance for credit losses on loans (48,312) (45,236) Loans, net $ 4,674,542 $ 4,504,434 (1) Note 10 - Derivatives
Schedule of activity in allowance for loan losses and allocation of allowance to loan segments	Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2023 $ 12,185 $ 1,012 $ 630 $ 20,599 $ 5,373 $ 7,750 $ 272 $ 47,821 Charge-offs — — — — — (16) (21) (37) Recoveries — 40 — 2 — — 13 55 Provision 488 (28) (164) 900 (937) 242 (28) 473 Balance at September 30, 2023 $ 12,673 $ 1,024 $ 466 $ 21,501 $ 4,436 $ 7,976 $ 236 $ 48,312 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at December 31, 2022 $ 11,532 $ 924 $ 280 $ 20,357 $ 4,645 $ 7,236 $ 262 $ 45,236 Charge-offs — — — (2,918) — (51) (70) (3,039) Recoveries 2 83 — 4 — 275 34 398 Provision 1,139 17 186 4,058 (209) 516 10 5,717 Balance at September 30, 2023 $ 12,673 $ 1,024 $ 466 $ 21,501 $ 4,436 $ 7,976 $ 236 $ 48,312 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2022 $ 10,082 $ 849 $ 327 $ 20,431 $ 4,370 $ 7,174 $ 327 $ 43,560 Charge-offs — — — (24) — (205) (24) (253) Recoveries 2 15 — 7 — 1,021 7 1,052 Provision 834 (16) (33) 741 99 (1,300) (63) 262 Balance at September 30, 2022 $ 10,918 $ 848 $ 294 $ 21,155 $ 4,469 $ 6,690 $ 247 $ 44,621 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Unallocated Total (in thousands) Balance at December 31, 2021 $ 3,631 $ 420 $ 69 $ 33,242 $ 2,010 $ 4,638 $ 367 $ 1,000 $ 45,377 Adoption of Topic 326 5,198 391 185 (10,194) 1,698 2,288 123 (1,000) (1,311) Charge-offs — — — (2,810) — (246) (55) — (3,111) Recoveries 2 108 — 13 — 1,495 67 — 1,685 Provision 2,087 (71) 40 904 761 (1,485) (255) — 1,981 Balance at September 30, 2022 $ 10,918 $ 848 $ 294 $ 21,155 $ 4,469 $ 6,690 $ 247 $ — $ 44,621
Schedule of carrying value of collateral dependent individually	September 30, 2023 December 31, 2022 Related Related Carrying Value Allowance Carrying Value Allowance (in thousands) Commercial: Commercial real estate $ 8,811 $ 5 $ 2,039 $ — Commercial and industrial 1,982 191 3,329 7 Commercial construction — — — — Total Commercial 10,793 196 5,368 7 Residential real estate 7,741 1 10,494 1 Total $ 18,534 $ 197 $ 15,862 $ 8
Summary of past due and non-accrual loans	90 Days 30-59 Days 60-89 Days or More Total Loans on Past Due Past Due Past Due Past Due Non-accrual (in thousands) September 30, 2023 Residential real estate: One- to four-family $ 2,078 $ 1,168 $ 3,018 $ 6,264 $ 7,498 Second mortgages and equity lines of credit 171 137 305 613 453 Commercial real estate — — 7,004 7,004 8,811 Commercial construction — — — — — Commercial and industrial 274 97 1,437 1,808 1,980 Consumer: Auto 132 16 30 178 31 Personal 36 17 5 58 10 Total $ 2,691 $ 1,435 $ 11,799 $ 15,925 $ 18,783 December 31, 2022 Residential real estate: One- to four-family $ 3,711 $ 524 $ 6,526 $ 10,761 $ 8,927 Second mortgages and equity lines of credit 407 5 189 601 421 Commercial real estate — — 120 120 2,039 Commercial construction — — — — — Commercial and industrial 26 492 2,901 3,419 3,329 Consumer: Auto 348 101 51 500 64 Personal 18 — 6 24 6 Total $ 4,510 $ 1,122 $ 9,793 $ 15,425 $ 14,786
Schedule of loans by risk rating	Revolving Revolving Loans Loans Converted Term Loans at Amortized Cost by Origination Year Amortized to Term 2023 2022 2021 2020 2019 Prior Cost Loans Total (in thousands) As of September 30, 2023 Commercial real estate Pass $ 124,574 $ 817,946 $ 454,639 $ 237,296 $ 246,011 $ 415,685 $ — $ — $ 2,296,151 Special mention — 17,026 — 4,309 9,063 14,526 — — 44,924 Substandard — — — — — 1,812 — — 1,812 Doubtful — — — — — 6,999 — — 6,999 Total commercial real estate 124,574 834,972 454,639 241,605 255,074 439,022 — — 2,349,886 YTD gross charge-offs — — — — — 2,918 — — 2,918 Commercial and industrial Pass 53,242 51,548 96,455 75,178 23,999 78,676 68,852 — 447,950 Special mention — — 5 — 2 610 — — 617 Substandard 19 88 72 — — 385 50 — 614 Doubtful — — 9 — — 1,307 50 — 1,366 Total commercial and industrial 53,261 51,636 96,541 75,178 24,001 80,978 68,952 — 450,547 YTD gross charge-offs 5 18 14 5 8 1 — — 51 Commercial construction Pass 16,726 115,057 58,048 — — — 1,393 — 191,224 Special mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total commercial construction 16,726 115,057 58,048 — — — 1,393 — 191,224 YTD gross charge-offs — — — — — — — — — Residential real estate Accrual 122,166 436,709 486,044 203,962 40,500 245,104 164,522 1,454 1,700,461 Non-accrual — — — 132 188 7,430 201 — 7,951 Total residential real estate 122,166 436,709 486,044 204,094 40,688 252,534 164,723 1,454 1,708,412 YTD gross charge-offs — — — — — — — — — Consumer Accrual 7,274 6,049 2,536 1,219 4,451 1,662 1,015 — 24,206 Non-accrual — 2 — 1 22 10 6 — 41 Total Consumer 7,274 6,051 2,536 1,220 4,473 1,672 1,021 — 24,247 YTD gross charge-offs — 10 4 14 14 28 — — 70 Total loans before basis adjustment $ 324,001 $ 1,444,425 $ 1,097,808 $ 522,097 $ 324,236 $ 774,206 $ 236,089 $ 1,454 $ 4,724,316 Total YTD gross charge-offs $ 5 $ 28 $ 18 $ 19 $ 22 $ 2,947 $ — $ — $ 3,039 Revolving Revolving Loans Loans Converted Term Loans at Amortized Cost by Origination Year Amortized to Term 2022 2021 2020 2019 2018 Prior Cost Loans Total (in thousands) As of December 31, 2022 Commercial real estate Pass $ 817,320 $ 441,277 $ 241,700 $ 254,221 $ 121,351 $ 340,634 $ — $ — $ 2,216,503 Special mention — — — 9,328 22,474 — — — 31,802 Substandard — — — — — 2,039 — — 2,039 Doubtful — — — — — — — — — Total commercial real estate 817,320 441,277 241,700 263,549 143,825 342,673 — — 2,250,344 Commercial and industrial Pass 53,078 95,600 82,170 26,568 37,358 50,500 76,647 — 421,921 Special mention — — — — 49 92 492 — 633 Substandard — 4 3 — 1 323 — — 331 Doubtful — — — — — 1,340 50 — 1,390 Total commercial and industrial 53,078 95,604 82,173 26,568 37,408 52,255 77,189 — 424,275 Commercial construction Pass 88,173 87,569 11,769 9,174 318 1,487 821 — 199,311 Special mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total commercial construction 88,173 87,569 11,769 9,174 318 1,487 821 — 199,311 Residential real estate Accrual 443,034 507,679 211,429 42,314 25,232 239,677 154,038 1,568 1,624,971 Non-accrual — 203 140 201 1,258 7,411 96 39 9,348 Total residential real estate 443,034 507,882 211,569 42,515 26,490 247,088 154,134 1,607 1,634,319 Consumer Accrual 9,948 3,588 1,971 16,955 6,122 1,733 1,034 — 41,351 Non-accrual 1 — — 28 20 17 4 — 70 Total Consumer 9,949 3,588 1,971 16,983 6,142 1,750 1,038 — 41,421 Total loans $ 1,411,554 $ 1,135,920 $ 549,182 $ 358,789 $ 214,183 $ 645,253 $ 233,182 $ 1,607 $ 4,549,670

MORTGAGE LOAN SERVICING (Tables

MORTGAGE LOAN SERVICING (Tables)	9 Months Ended
MORTGAGE LOAN SERVICING (Tables)	Sep. 30, 2023
MORTGAGE LOAN SERVICING
Tabular disclosure of assumptions used in the calculation of fair value of MSR	September 30, December 31, 2023 2022 Prepayment speed 7.20 % 7.10 % Discount rate 10.03 9.81 Default rate 1.68 1.63
Schedule of summarized changes to mortgage servicing rights	Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Balance, beginning of period $ 48,176 $ 47,130 $ 48,138 $ 38,268 Additions 900 915 2,194 3,630 Changes in fair value due to: Reductions from loans paid off during the period (644) (747) (1,494) (2,351) Changes in valuation inputs or assumptions 769 2,563 363 10,314 Balance, end of period $ 49,201 $ 49,861 $ 49,201 $ 49,861

DEPOSITS (Tables)

DEPOSITS (Tables)	9 Months Ended
DEPOSITS (Tables)	Sep. 30, 2023
DEPOSITS
Summary of deposit balances, by type	September 30, December 31, 2023 2022 (in thousands) NOW and demand deposit accounts $ 997,988 $ 1,060,268 Regular savings and club accounts 1,324,635 1,468,172 Money market deposit accounts 951,128 861,704 Total non-certificate accounts 3,273,751 3,390,144 Term certificate accounts greater than $250,000 248,736 110,360 Term certificate accounts less than or equal to $250,000 610,530 387,615 Brokered deposits 276,941 301,380 Total certificate accounts 1,136,207 799,355 Total deposits $ 4,409,958 $ 4,189,499
Summary of certificate accounts by maturity	Weighted Average Amount Rate (dollars in thousands) Within 1 year $ 1,079,547 4.19 % Over 1 year to 2 years 27,003 2.01 Over 2 years to 3 years 26,809 3.06 Over 3 years to 4 years 2,467 0.73 Over 4 years to 5 years 381 2.58 Total certificate deposits 1,136,207 4.10 %

BORROWINGS (Tables)

BORROWINGS (Tables)	9 Months Ended
BORROWINGS (Tables)	Sep. 30, 2023
BORROWINGS
Schedule of borrowed funds by maturity and call date	September 30, 2023 December 31, 2022 Amount by Weighted Amount by Weighted Scheduled Amount by Average Scheduled Average Maturity* Call Date (1) Rate (2) Maturity* Rate (2) (dollars in thousands) Year ending December 31: 2023 $ — $ 90,000 — % $ 180 1.40 % 2024 13,400 33,400 1.39 13,400 1.39 2025 60,987 60,987 4.32 987 — 2026 100,000 40,000 4.28 — — 2027 — — — — — 2028 and thereafter 51,083 1,083 3.81 1,108 2.00 $ 225,470 $ 225,470 4.01 % $ 15,675 1.35 % * Includes an amortizing advance requiring monthly principal and interest payments. (1) (2)

OTHER COMMITMENTS AND CONTING_2

OTHER COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
OTHER COMMITMENTS AND CONTINGENCIES (Tables)	Sep. 30, 2023
Schedule of financial instruments with off-balance sheet credit risk	September 30, December 31, 2023 2022 (in thousands) Commitments to grant residential real estate loans-HarborOne Mortgage $ 52,370 $ 57,916 Commitments to grant other loans 63,777 43,700 Unadvanced funds on home equity lines of credit 255,391 251,759 Unadvanced funds on revolving lines of credit 318,427 351,382 Unadvanced funds on construction loans 226,626 262,945
Schedule of activity in the ACL on unfunded commitments	Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2023 $ 12,185 $ 1,012 $ 630 $ 20,599 $ 5,373 $ 7,750 $ 272 $ 47,821 Charge-offs — — — — — (16) (21) (37) Recoveries — 40 — 2 — — 13 55 Provision 488 (28) (164) 900 (937) 242 (28) 473 Balance at September 30, 2023 $ 12,673 $ 1,024 $ 466 $ 21,501 $ 4,436 $ 7,976 $ 236 $ 48,312 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at December 31, 2022 $ 11,532 $ 924 $ 280 $ 20,357 $ 4,645 $ 7,236 $ 262 $ 45,236 Charge-offs — — — (2,918) — (51) (70) (3,039) Recoveries 2 83 — 4 — 275 34 398 Provision 1,139 17 186 4,058 (209) 516 10 5,717 Balance at September 30, 2023 $ 12,673 $ 1,024 $ 466 $ 21,501 $ 4,436 $ 7,976 $ 236 $ 48,312 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2022 $ 10,082 $ 849 $ 327 $ 20,431 $ 4,370 $ 7,174 $ 327 $ 43,560 Charge-offs — — — (24) — (205) (24) (253) Recoveries 2 15 — 7 — 1,021 7 1,052 Provision 834 (16) (33) 741 99 (1,300) (63) 262 Balance at September 30, 2022 $ 10,918 $ 848 $ 294 $ 21,155 $ 4,469 $ 6,690 $ 247 $ 44,621 Second Mortgages Residential One- to Four- and Equity Real Estate Commercial Commercial Commercial Family Lines of Credit Construction Real Estate Construction and Industrial Consumer Unallocated Total (in thousands) Balance at December 31, 2021 $ 3,631 $ 420 $ 69 $ 33,242 $ 2,010 $ 4,638 $ 367 $ 1,000 $ 45,377 Adoption of Topic 326 5,198 391 185 (10,194) 1,698 2,288 123 (1,000) (1,311) Charge-offs — — — (2,810) — (246) (55) — (3,111) Recoveries 2 108 — 13 — 1,495 67 — 1,685 Provision 2,087 (71) 40 904 761 (1,485) (255) — 1,981 Balance at September 30, 2022 $ 10,918 $ 848 $ 294 $ 21,155 $ 4,469 $ 6,690 $ 247 $ — $ 44,621
Unfunded Commitment
Schedule of activity in the ACL on unfunded commitments	Residential Commercial Commercial Commercial Real Estate Real Estate Construction and Industrial Consumer Total (in thousands) Balance at June 30, 2023 $ 272 $ 490 $ 3,180 $ 870 $ 19 $ 4,831 Provision (4) (17) (603) 41 (3) (586) Balance at September 30, 2023 $ 268 $ 473 $ 2,577 $ 911 $ 16 $ 4,245 Balance at June 30, 2022 $ 337 $ 482 $ 3,638 $ 624 $ 15 $ 5,096 Provision (7) 29 135 253 (4) 406 Balance at September 30, 2022 $ 330 $ 511 $ 3,773 $ 877 $ 11 $ 5,502 Residential Commercial Commercial Commercial Real Estate Real Estate Construction and Industrial Consumer Total (in thousands) Balance at December 31, 2022 $ 336 $ 628 $ 3,079 $ 870 $ 14 $ 4,927 Provision (68) (155) (502) 41 2 (682) Balance at September 30, 2023 $ 268 $ 473 $ 2,577 $ 911 $ 16 $ 4,245 Balance at December 31, 2021 $ — $ — $ — $ — $ — $ — Adoption of Topic 326 318 380 2,561 658 14 3,931 Provision 12 131 1,212 219 (3) 1,571 Balance at September 30, 2022 $ 330 $ 511 $ 3,773 $ 877 $ 11 $ 5,502

DERIVATIVES (Tables)

DERIVATIVES (Tables)	9 Months Ended
DERIVATIVES (Tables)	Sep. 30, 2023
DERIVATIVES
Schedule of amounts recorded on the consolidated statement of financial condition related to cumulative basis adjustment for fair value hedges	Cumulative Amount of Fair Value Hedging Adjustment Included in the Line Item in the Consolidated Balance Sheets Carrying Amount of the Hedged Carrying Amount of the Hedged in Which the Hedged Item is Included Assets Assets September 30, September 30, September 30, September 30, 2023 2022 2023 2022 (in thousands) Loans held for investment (1) $ 98,538 $ — $ (1,462) $ — Total $ 98,538 $ — $ (1,462) $ — (1)
Schedule of outstanding notional balances and fair values of outstanding derivative instruments	Assets Liabilities Notional Fair Fair Amount Value Value (in thousands) September 30, 2023: Derivatives designated as hedging instruments Fair value hedge - interest rate swaps $ 100,000 $ 1,463 $ — Cashflow hedge - interest rate swaps 100,000 6,946 — Total derivatives designated as hedging instruments $ 8,409 $ — Derivatives not designated as hedging instruments Derivative loan commitments $ 40,445 $ 420 $ 111 Forward loan sale commitments 31,000 304 — Interest rate swaps 859,275 33,889 33,889 Risk participation agreements 182,347 — — Total derivatives not designated as hedging instruments $ 34,613 $ 34,000 Total derivatives $ 43,022 $ 34,000 December 31, 2022: Derivatives designated as hedging instruments Cashflow hedge - interest rate swaps $ 100,000 $ 8,314 $ — Total derivatives designated as hedging instruments $ 8,314 $ — Derivatives not designated as hedging instruments Derivative loan commitments $ 27,935 $ 238 $ 65 Forward loan sale commitments 29,000 249 39 Interest rate swaps 772,588 28,525 28,525 Risk participation agreements 164,528 — — Total derivatives not designated as hedging instruments $ 29,012 $ 28,629 Total derivatives $ 37,326 $ 28,629
Schedule of net gains and losses on derivative instruments	Location of gain (loss) recognized in Three Months Ended September 30, Nine Months Ended September 30, Income 2023 2022 2023 2022 (in thousands) Derivatives designated as fair value hedge Hedged items - loans Interest income $ (1,018) $ — $ (1,462) $ — Interest rate swap contracts Interest income 1,026 — 1,463 — Total $ 8 $ — $ 1 $ — Derivatives not designated as hedging instruments Derivative loan commitments Mortgage banking income $ (129) $ (606) $ 137 $ (874) Forward loan sale commitments Mortgage banking income 45 1,377 94 1,356 Interest rate swaps Other income — — — 330 Total $ (84) $ 771 $ 231 $ 812
Schedule of effect of cash flow hedge accounting on accumulated other comprehensive income	Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Derivatives designated as hedging instruments (Loss) gain in OCI on derivatives (effective portion), net of tax $ (448) $ 1,610 $ (983) $ 5,038 Gain (loss) reclassified from OCI into interest expense (effective portion) $ 1,221 $ 420 $ 3,373 $ 380
Schedule of offsetting of derivative and amounts subject to an enforceable master netting arrangement, not offset in the consolidated balance sheet	Gross Amounts Not Offset in the Consolidated Balance Sheets Net Amounts Gross Amounts Gross Amounts Assets (Liabilities) Cash of Recognized Offset in the presented in the Collateral Assets Consolidated Consolidated Financial (Received) Net (Liabilities) Balance Sheets Balance Sheets Instruments Posted Amount (in thousands) Derivatives designated as hedging instruments Interest rate swap on deposits $ 6,946 $ — $ 6,946 $ — $ (6,946) $ — Interest rate swap on residential real estate loans $ 1,463 $ — $ 1,463 $ — $ — $ 1,463 Derivatives not designated as hedging instruments Customer interest rate swaps $ 33,824 $ — $ 33,824 $ — $ (37,054) $ (3,230)

OPERATING LEASE ROU ASSETS AN_2

OPERATING LEASE ROU ASSETS AND LIABILITIES (Tables)	9 Months Ended
OPERATING LEASE ROU ASSETS AND LIABILITIES (Tables)	Sep. 30, 2023
OPERATING LEASE ROU ASSETS AND LIABILITIES
Schedule of undiscounted future minimum operating lease payments	September 30, 2023 (in thousands) 2023 $ 760 2024 2,827 2025 2,552 2026 2,505 2027 2,445 Thereafter 19,421 Total lease payments 30,510 Imputed interest (5,347) Total present value of operating lease liabilities $ 25,163
Schedule of weighted-average discount rate and remaining lease term	September 30, 2023 December 31, 2022 Weighted-average discount rate 2.08 % 2.02 % Weighted-average remaining lease term (years) 16.25 17.33
Schedule of components of total lease expense	Three Months Ended Nine Months Ended September 30, September 30, 2023 2022 2023 2022 (in thousands) Lease Expense: Operating lease expense $ 766 $ 836 $ 2,365 $ 2,472 Short-term lease expense 40 37 105 105 Variable lease expense 5 — 10 — Sublease income (3) (4) (12) (9) Total lease expense $ 808 $ 869 $ 2,468 $ 2,568 Other Information Cash paid for amounts included in the measurement of lease liabilities- operating cash flows for operating leases 768 845 2,382 2,446 Operating Lease - Operating cash flows (Liability reduction) 640 701 1,975 2,041 ROU assets obtained in exchange for new operating lease liabilities — 77 596 1,160

MINIMUM REGULATORY CAPITAL RE_2

MINIMUM REGULATORY CAPITAL REQUIREMENTS (Tables)	9 Months Ended
MINIMUM REGULATORY CAPITAL REQUIREMENTS (Tables)	Sep. 30, 2023
MINIMUM REGULATORY CAPITAL REQUIREMENTS
Summary of the company's and the bank's actual regulatory capital ratios	Minimum Required to be Considered "Well Capitalized" Minimum Required for Under Prompt Corrective Actual Capital Adequacy Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) HarborOne Bancorp, Inc. September 30, 2023 Common equity Tier 1 capital to risk-weighted assets $ 570,586 12.0 % $ 213,499 4.5 % N/A N/A Tier 1 capital to risk-weighted assets 570,586 12.0 284,665 6.0 N/A N/A Total capital to risk-weighted assets 651,143 13.7 379,554 8.0 N/A N/A Tier 1 capital to average assets 570,586 10.1 224,874 4.0 N/A N/A December 31, 2022 Common equity Tier 1 capital to risk-weighted assets $ 592,610 12.8 % $ 208,541 4.5 % N/A N/A Tier 1 capital to risk-weighted assets 592,610 12.8 278,054 6.0 N/A N/A Total capital to risk-weighted assets 677,774 14.6 370,739 8.0 N/A N/A Tier 1 capital to average assets 592,610 11.5 205,897 4.0 N/A N/A HarborOne Bank September 30, 2023 Common equity Tier 1 capital to risk-weighted assets $ 543,025 11.5 % $ 213,410 4.5 % $ 308,259 6.5 % Tier 1 capital to risk-weighted assets 543,025 11.5 284,547 6.0 379,396 8.0 Total capital to risk-weighted assets 595,582 12.6 379,396 8.0 474,245 10.0 Tier 1 capital to average assets 543,025 9.7 224,848 4.0 281,060 5.0 December 31, 2022 Common equity Tier 1 capital to risk-weighted assets $ 525,522 11.3 % $ 208,447 4.5 % $ 301,090 6.5 % Tier 1 capital to risk-weighted assets 525,522 11.3 277,929 6.0 370,572 8.0 Total capital to risk-weighted assets 575,686 12.4 370,572 8.0 463,215 10.0 Tier 1 capital to average assets 525,522 10.2 205,874 4.0 257,342 5.0

COMPREHENSIVE (LOSS) INCOME (Ta

COMPREHENSIVE (LOSS) INCOME (Tables)	9 Months Ended
COMPREHENSIVE (LOSS) INCOME (Tables)	Sep. 30, 2023
COMPREHENSIVE (LOSS) INCOME
Summary of changes in accumulated other comprehensive (loss) income	Three Months Ended September 30, 2023 2022 Available Cash Available Cash Postretirement for Sale Flow for Sale Flow Benefit Securities Hedge Total Securities Hedge Total (in thousands) Balance at beginning of period $ 112 $ (51,847) $ 5,445 $ (46,290) $ (38,892) $ 4,625 $ (34,267) Other comprehensive income (loss) before reclassifications — (14,718) 598 (14,120) (20,554) 2,658 (17,896) Amounts reclassified from accumulated other comprehensive (loss) income (20) — (1,221) (1,241) — (420) (420) Net current period other comprehensive (loss) income (20) (14,718) (623) (15,361) (20,554) 2,238 (18,316) Related tax effect — 4,487 175 4,662 4,530 (628) 3,902 Balance at end of period $ 92 $ (62,078) $ 4,997 $ (56,989) $ (54,916) $ 6,235 $ (48,681) Nine Months Ended September 30, 2023 2022 Available Cash Available Cash Postretirement for Sale Flow for Sale Flow Benefit Securities Hedge Total Securities Hedge Total (in thousands) Balance at beginning of period $ 150 $ (53,212) $ 5,980 $ (47,082) $ (2,834) $ 1,197 $ (1,637) Other comprehensive (loss) income before reclassifications 1 (12,995) 2,005 (10,989) (66,806) 7,386 (59,420) Amounts reclassified from accumulated other comprehensive income (loss) (59) — (3,373) (3,432) — (380) (380) Net current period other comprehensive (loss) income (58) (12,995) (1,368) (14,421) (66,806) 7,006 (59,800) Related tax effect — 4,129 385 4,514 14,724 (1,968) 12,756 Balance at end of period $ 92 $ (62,078) $ 4,997 $ (56,989) $ (54,916) $ 6,235 $ (48,681)

FAIR VALUE OF ASSETS AND LIAB_2

FAIR VALUE OF ASSETS AND LIABILITIES (Tables)	9 Months Ended
FAIR VALUE OF ASSETS AND LIABILITIES (Tables)	Sep. 30, 2023
FAIR VALUE OF ASSETS AND LIABILITIES
Schedule of assets and liabilities measured at fair value on a recurring basis	Total Level 1 Level 2 Level 3 Fair Value (in thousands) September 30, 2023 Assets Securities available for sale $ — $ 271,078 $ — $ 271,078 Loans held for sale — 17,796 — 17,796 Mortgage servicing rights — 49,201 — 49,201 Derivatives — 42,298 724 43,022 $ — $ 380,373 $ 724 $ 381,097 Liabilities Derivatives $ — $ 33,889 $ 111 $ 34,000 December 31, 2022 Assets Securities available for sale $ — $ 301,149 $ — $ 301,149 Loans held for sale — 18,544 — 18,544 Mortgage servicing rights — 48,138 — 48,138 Derivatives — 36,839 487 37,326 $ — $ 404,670 $ 487 $ 405,157 Liabilities Derivatives $ — $ 28,525 $ 104 $ 28,629
Schedule of changes in Level 3 assets measured at fair value on a recurring basis	Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Assets: Derivative and Forward Loan Sale Commitments: Balance at beginning of period $ 783 $ 1,344 $ 487 $ 1,583 Total gains (losses) included in net income (1) (59) 891 237 652 Balance at end of period $ 724 $ 2,235 $ 724 $ 2,235 Changes in unrealized gains relating to instruments at period end $ 724 $ 2,235 $ 724 $ 2,235 Liabilities: Derivative and Forward Loan Sale Commitments: Balance at beginning of period $ (85) $ (239) $ (104) $ (189) Total gains (losses) included in net income (1) (26) (120) (7) (170) Balance at end of period $ (111) $ (359) $ (111) $ (359) Changes in unrealized losses relating to instruments at period end $ (111) $ (359) $ (111) $ (359) (1) Included in mortgage banking income on the Consolidated Statements of Income.
Schedule of changes in Level 3 liabilities measured at fair value on a recurring basis	Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Assets: Derivative and Forward Loan Sale Commitments: Balance at beginning of period $ 783 $ 1,344 $ 487 $ 1,583 Total gains (losses) included in net income (1) (59) 891 237 652 Balance at end of period $ 724 $ 2,235 $ 724 $ 2,235 Changes in unrealized gains relating to instruments at period end $ 724 $ 2,235 $ 724 $ 2,235 Liabilities: Derivative and Forward Loan Sale Commitments: Balance at beginning of period $ (85) $ (239) $ (104) $ (189) Total gains (losses) included in net income (1) (26) (120) (7) (170) Balance at end of period $ (111) $ (359) $ (111) $ (359) Changes in unrealized losses relating to instruments at period end $ (111) $ (359) $ (111) $ (359) (1) Included in mortgage banking income on the Consolidated Statements of Income.
Schedule of assets measured at fair value on a non-recurring basis	September 30, December 31, 2023 2022 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (in thousands) Collateral-dependent impaired loans $ — $ — $ 7,340 $ — $ — $ 349 Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (in thousands) Collateral-dependent impaired loans $ 178 $ 92 $ 3,116 $ 840
Schedule of changes in Level 3 assets measured at fair value on a nonrecurring basis	The table below presents quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a nonrecurring basis at the dates indicated. Fair Value September 30, December 31, Valuation Technique 2023 2022 (in thousands) Collateral-dependent impaired loans $ 7,340 $ 349 Sales Comparison Approach (1) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which includes unobservable inputs such as adjustments for differences between the comparable sales. The Company may also use another source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Appraisals may be adjusted by Management for qualitative factors and estimated liquidation expenses. Generally, appraisals for residential real estate and commercial real estate loan are discounted 20% . Commercial and industrial appraisals are generally discounted 25% - 50% . Management may take larger discounts to reflect market liquidity for certain types of assets not addressed in the appraisals.
Schedule of estimated fair values and related carrying amounts of financial instruments	September 30, 2023 Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (in thousands) Financial assets: Cash and cash equivalents $ 246,784 $ 246,784 $ — $ — $ 246,784 Securities available for sale 271,078 — 271,078 — 271,078 Securities held to maturity 19,795 — 18,683 — 18,683 Federal Home Loan Bank stock 23,378 N/A N/A N/A N/A Loans held for sale 17,796 — 17,796 — 17,796 Loans, net 4,674,542 — — 4,451,754 4,451,754 Retirement plan annuities 15,023 — — 15,023 15,023 Accrued interest receivable 17,506 — 17,506 — 17,506 Derivatives 43,022 — 42,298 724 43,022 Financial liabilities: Deposits 4,409,958 — — 4,389,434 4,389,434 Borrowed funds 475,470 — 472,875 — 472,875 Subordinated debt 34,380 — — 34,099 34,099 Mortgagors' escrow accounts 10,155 — — 10,155 10,155 Accrued interest payable 4,623 — 4,623 — 4,623 Derivatives 34,000 — 33,889 111 34,000 December 31, 2022 Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (in thousands) Financial assets: Cash and cash equivalents $ 98,017 $ 98,017 $ — $ — $ 98,017 Securities available for sale 301,149 — 301,149 — 301,149 Securities held to maturity 19,949 — 19,274 — 19,274 Federal Home Loan Bank stock 20,071 N/A N/A N/A N/A Loans held for sale 18,544 — 18,544 — 18,544 Loans, net 4,504,434 — — 4,383,613 4,383,613 Retirement plan annuities 14,630 — — 14,630 14,630 Accrued interest receivable 15,139 — 15,139 — 15,139 Derivatives 37,326 — 36,839 487 37,326 Financial liabilities: Deposits 4,189,499 — — 4,166,796 4,166,796 Borrowed funds 400,675 — 399,655 — 399,655 Subordinated debt 34,285 — — 28,221 28,221 Mortgagors' escrow accounts 9,537 — — 9,537 9,537 Accrued interest payable 2,325 — 2,325 — 2,325 Derivatives 28,629 — 28,525 104 28,629

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	9 Months Ended
EARNINGS PER SHARE (Tables)	Sep. 30, 2023
EARNINGS PER SHARE
Schedule of basic and diluted earnings per share	Three Months Ended September 30, 2023 2022 Net income available to common stockholders (in thousands) $ 8,412 $ 13,758 Average number of common shares outstanding 46,369,111 49,626,152 Less: Average unallocated ESOP shares and non-vested restricted shares (3,492,218) (3,795,415) Weighted average number of common shares outstanding used to calculate basic earnings per common share 42,876,893 45,830,737 Dilutive effect of share-based compensation 106,584 589,790 Weighted average number of common shares outstanding used to calculate diluted earnings per common share 42,983,477 46,420,527 Earnings per common share: Basic $ 0.20 $ 0.30 Diluted $ 0.20 $ 0.30 Nine Months Ended September 30, 2023 2022 Net income available to common stockholders (in thousands) $ 23,188 $ 36,012 Average number of common shares outstanding 47,133,894 50,738,918 Less: Average unallocated ESOP shares and non-vested restricted shares (3,541,940) (3,863,606) Weighted average number of common shares outstanding used to calculate basic earnings per common share 43,591,954 46,875,312 Dilutive effect of share-based compensation 201,183 666,335 Weighted average number of common shares outstanding used to calculate diluted earnings per common share 43,793,137 47,541,647 Earnings per common share: Basic $ 0.53 $ 0.77 Diluted $ 0.53 $ 0.76

SEGMENT REPORTING (Tables)

SEGMENT REPORTING (Tables)	9 Months Ended
SEGMENT REPORTING (Tables)	Sep. 30, 2023
SEGMENT REPORTING
Summary of reportable segments	Three Months Ended September 30, 2023 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 31,468 $ 199 $ 31,080 Benefit for credit losses (113) — (113) Net interest and dividend income, after benefit for credit losses 31,581 199 31,193 Mortgage banking income: Gain on sale of mortgage loans — 2,704 2,704 Intersegment gain (loss) (198) 249 — Changes in mortgage servicing rights fair value 18 107 125 Other 188 2,082 2,270 Total mortgage banking income 8 5,142 5,099 Other noninterest income (loss) 6,503 (4) 6,499 Total noninterest income 6,511 5,138 11,598 Noninterest expense 26,272 5,490 31,872 Income (loss) before income taxes 11,820 (153) 10,919 Provision (benefit) for income taxes 2,716 (15) 2,507 Net income (loss) $ 9,104 $ (138) $ 8,412 Nine Months Ended September 30, 2023 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 98,520 $ 646 $ 97,578 Provision for credit losses 5,036 — 5,036 Net interest and dividend income, after provision for credit losses 93,484 646 92,542 Mortgage banking income: Gain on sale of mortgage loans — 8,228 8,228 Intersegment gain (loss) (904) 793 — Changes in mortgage servicing rights fair value (89) (1,042) (1,131) Other 584 6,214 6,798 Total mortgage banking income (loss) (409) 14,193 13,895 Other noninterest income 19,059 (4) 19,055 Total noninterest income 18,650 14,189 32,950 Noninterest expense 78,655 16,305 95,106 Income (loss) before income taxes 33,479 (1,470) 30,386 Provision (benefit) for income taxes 8,024 (348) 7,198 Net income (loss) $ 25,455 $ (1,122) $ 23,188 Total assets at period end $ 5,672,956 $ 113,619 $ 5,664,387 Goodwill at period end $ 59,042 $ 10,760 $ 69,802 Three Months Ended September 30, 2022 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 39,373 $ 437 $ 39,332 Provision for credit losses 668 — 668 Net interest and dividend income, after provision for credit losses 38,705 437 38,664 Mortgage banking income: Gain on sale of mortgage loans — 3,809 3,809 Intersegment gain (loss) (904) 698 — Changes in mortgage servicing rights fair value 164 1,652 1,816 Other 218 2,235 2,453 Total mortgage banking income (loss) (522) 8,394 8,078 Other noninterest income (loss) 6,180 (13) 6,167 Total noninterest income 5,658 8,381 14,245 Noninterest expense 27,707 6,610 34,473 Income before income taxes 16,656 2,208 18,436 Provision for income taxes 4,166 687 4,678 Net income $ 12,490 $ 1,521 $ 13,758 Nine Months Ended September 30, 2022 HarborOne HarborOne Bank Mortgage Consolidated (in thousands) Net interest and dividend income $ 110,043 $ 1,198 $ 109,797 Provision for credit losses 3,552 — 3,552 Net interest and dividend income, after provision for credit losses 106,491 1,198 106,245 Mortgage banking income: Gain on sale of mortgage loans — 13,669 13,669 Intersegment gain (loss) (2,607) 2,632 — Changes in mortgage servicing rights fair value 881 7,082 7,963 Other 670 6,953 7,623 Total mortgage banking income (loss) (1,056) 30,336 29,255 Other noninterest income 18,151 3 18,154 Total noninterest income 17,095 30,339 47,409 Noninterest expense 81,663 21,613 104,262 Income before income taxes 41,923 9,924 49,392 Provision for income taxes 11,273 2,777 13,380 Net income $ 30,650 $ 7,147 $ 36,012 Total assets at period end $ 5,000,963 $ 132,431 $ 4,987,643 Goodwill at period end $ 59,042 $ 10,760 $ 69,802

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	Sep. 30, 2023 item state
Number of full-service bank offices \| item	30
HarborOne Mortgage
Additional states licensed to lend \| state	5

DEBT SECURITIES - Summary of se

DEBT SECURITIES - Summary of securities available for sale and held to maturity (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Securities
Accrued interest receivable	$ 913,000	$ 957,000
Securities available for sale, at fair value	271,078,000	301,149,000
Amortized Cost	19,795,000	19,949,000
Securities available for sale
Amortized Cost	352,328,000	369,404,000
Gross Unrealized Losses	81,250,000	68,255,000
Allowance for Credit Loss	0
Fair Value	271,078,000	301,149,000
Securities held to maturity
Amortized Cost	19,795,000	19,949,000
Gross Unrealized Losses	1,112,000	675,000
Fair Value	18,683,000	19,274,000
BTFP borrowing capacity
Securities
Pledged as collateral	361,000,000
Amortized Cost	15,000,000
Securities held to maturity
Amortized Cost	15,000,000
Asset Pledged as Collateral
Securities
Securities available for sale, at fair value	268,600,000
Securities available for sale
Fair Value	268,600,000
U.S. government and government-sponsored enterprise obligations
Securities
Securities available for sale, at fair value	38,130,000	38,494,000
Amortized Cost	15,000,000	15,000,000
Securities available for sale
Amortized Cost	47,143,000	47,143,000
Gross Unrealized Losses	9,013,000	8,649,000
Fair Value	38,130,000	38,494,000
Securities held to maturity
Amortized Cost	15,000,000	15,000,000
Gross Unrealized Losses	782,000	597,000
Fair Value	14,218,000	14,403,000
U.S. government agency and government-sponsored residential mortgage-backed securities
Securities
Securities available for sale, at fair value	228,492,000	256,815,000
Securities available for sale
Amortized Cost	300,266,000	315,964,000
Gross Unrealized Losses	71,774,000	59,149,000
Fair Value	228,492,000	256,815,000
U.S. government-sponsored collateralized mortgage obligations
Securities
Securities available for sale, at fair value	1,932,000	2,499,000
Securities available for sale
Amortized Cost	2,034,000	2,612,000
Gross Unrealized Losses	102,000	113,000
Fair Value	1,932,000	2,499,000
SBA asset-backed securities
Securities
Securities available for sale, at fair value	1,724,000	2,495,000
Amortized Cost	4,795,000	4,949,000
Securities available for sale
Amortized Cost	1,885,000	2,685,000
Gross Unrealized Losses	161,000	190,000
Fair Value	1,724,000	2,495,000
Securities held to maturity
Amortized Cost	4,795,000	4,949,000
Gross Unrealized Losses	330,000	78,000
Fair Value	4,465,000	4,871,000
Corporate bonds
Securities
Securities available for sale, at fair value	800,000	846,000
Securities available for sale
Amortized Cost	1,000,000	1,000,000
Gross Unrealized Losses	200,000	154,000
Fair Value	$ 800,000	$ 846,000

DEBT SECURITIES - Contractual m

DEBT SECURITIES - Contractual maturity (Details)	3 Months Ended		9 Months Ended
DEBT SECURITIES - Contractual maturity (Details)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Securities
Gain on sale and call of securities, net	$ 0	$ 0	$ 0	$ 0
Fair Value	271,078,000		271,078,000		$ 301,149,000
Fair Value	18,683,000		18,683,000		19,274,000
Allowance for Credit Loss	0		0
Amortized Cost-Available-for-Sale
After 1 year through 5 years	6,998,000		6,998,000
After 5 years through 10 years	41,145,000		41,145,000
Total for contractual maturity	48,143,000		48,143,000
Total	352,328,000		352,328,000		369,404,000
Fair Value-Available-for-Sale
After 1 year through 5 years	6,380,000		6,380,000
After 5 years through 10 years	32,550,000		32,550,000
Total for contractual maturity	38,930,000		38,930,000
Total	271,078,000		271,078,000		301,149,000
Amortized Cost-Held-to-Maturity
Amortized Cost	19,795,000		19,795,000		19,949,000
After 1 year through 5 years	15,000,000		15,000,000
Total for contractual maturity	15,000,000		15,000,000
Total	19,795,000		19,795,000
Fair Value-Held-to-Maturity
After 1 year through 5 years	14,218,000		14,218,000
Total for contractual maturity	14,218,000		14,218,000
Total	18,683,000		$ 18,683,000		19,274,000
Sales and proceeds
Number of holdings greater than 10% of shareholder equity \| security			0
Minimum
Securities
Maturity period			2 years
Maximum
Securities
Maturity period			28 years
Asset Pledged as Collateral
Securities
Fair Value	268,600,000		$ 268,600,000
Fair Value-Available-for-Sale
Total	268,600,000		268,600,000
U.S. government agency and government-sponsored residential mortgage-backed securities
Securities
Fair Value	228,492,000		228,492,000		256,815,000
Amortized Cost-Available-for-Sale
No single maturity date	300,266,000		300,266,000
Total	300,266,000		300,266,000		315,964,000
Fair Value-Available-for-Sale
No single maturity date	228,492,000		228,492,000
Total	228,492,000		228,492,000		256,815,000
U.S. government-sponsored collateralized mortgage obligations
Securities
Fair Value	1,932,000		1,932,000		2,499,000
Amortized Cost-Available-for-Sale
No single maturity date	2,034,000		2,034,000
Total	2,034,000		2,034,000		2,612,000
Fair Value-Available-for-Sale
No single maturity date	1,932,000		1,932,000
Total	1,932,000		1,932,000		2,499,000
SBA asset-backed securities
Securities
Fair Value	1,724,000		1,724,000		2,495,000
Fair Value	4,465,000		4,465,000		4,871,000
Amortized Cost-Available-for-Sale
No single maturity date	1,885,000		1,885,000
Total	1,885,000		1,885,000		2,685,000
Fair Value-Available-for-Sale
No single maturity date	1,724,000		1,724,000
Total	1,724,000		1,724,000		2,495,000
Amortized Cost-Held-to-Maturity
Amortized Cost	4,795,000		4,795,000		4,949,000
No single maturity date	4,795,000		4,795,000
Fair Value-Held-to-Maturity
No single maturity date	4,465,000		4,465,000
Total	4,465,000		4,465,000		4,871,000
U.S. government and government-sponsored enterprise obligations
Securities
Fair Value	38,130,000		38,130,000		38,494,000
Fair Value	14,218,000		14,218,000		14,403,000
Amortized Cost-Available-for-Sale
Total	47,143,000		47,143,000		47,143,000
Fair Value-Available-for-Sale
Total	38,130,000		38,130,000		38,494,000
Amortized Cost-Held-to-Maturity
Amortized Cost	15,000,000		15,000,000		15,000,000
Fair Value-Held-to-Maturity
Total	14,218,000		$ 14,218,000		14,403,000
U.S. government and government-sponsored enterprise obligations \| Minimum
Securities
Maturity period			4 years
Callable period			1 month
U.S. government and government-sponsored enterprise obligations \| Maximum
Securities
Maturity period			9 years
Callable period			4 years
Corporate bonds
Securities
Fair Value	800,000		$ 800,000		846,000
Amortized Cost-Available-for-Sale
Total	1,000,000		1,000,000		1,000,000
Fair Value-Available-for-Sale
Total	800,000		800,000		$ 846,000
U.S. government and government-sponsored enterprise obligations and corporate bonds
Securities
Fair Value	53,100,000		53,100,000
Fair Value-Available-for-Sale
Total	$ 53,100,000		$ 53,100,000

DEBT SECURITIES - Gross unreali

DEBT SECURITIES - Gross unrealized losses aggregated by category (Details)	9 Months Ended
	Sep. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($)
Marketable Securities [Line Items]
Less than Twelve Months		$ 4,326,000
Twelve Months and Over	$ 81,250,000	63,929,000
Less Than Twelve Months	34,000	45,805,000
Twelve Months and Over	271,044,000	255,309,000
Less than 12 months	330,000	675,000
Twelve months and over	782,000
Less than 12 months	4,465,000	19,274,000
Twelve months and Over	$ 14,218,000
Number of debt securities \| security	132
Number of debt securities in unrealized loss position \| security	132
Debt Securities, Available-for-Sale, Amortized Cost, Allowance for Credit Loss, Excluding Accrued Interest	$ 0
U.S. government and government-sponsored enterprise obligations
Marketable Securities [Line Items]
Less than Twelve Months		249,000
Twelve Months and Over	9,013,000	8,400,000
Less Than Twelve Months		4,751,000
Twelve Months and Over	38,130,000	33,743,000
Less than 12 months		597,000
Twelve months and over	782,000
Less than 12 months		14,403,000
Twelve months and Over	14,218,000
U.S. government agency and government-sponsored residential mortgage-backed securities
Marketable Securities [Line Items]
Less than Twelve Months	0	3,620,000
Twelve Months and Over	71,774,000	55,529,000
Less Than Twelve Months	34,000	35,214,000
Twelve Months and Over	228,458,000	221,566,000
U.S. government-sponsored collateralized mortgage obligations
Marketable Securities [Line Items]
Less than Twelve Months		113,000
Twelve Months and Over	102,000
Less Than Twelve Months		2,499,000
Twelve Months and Over	1,932,000
SBA asset-backed securities
Marketable Securities [Line Items]
Less than Twelve Months		190,000
Twelve Months and Over	161,000
Less Than Twelve Months		2,495,000
Twelve Months and Over	1,724,000
Less than 12 months	330,000	78,000
Less than 12 months	4,465,000	4,871,000
Corporate bonds
Marketable Securities [Line Items]
Less than Twelve Months		154,000
Twelve Months and Over	200,000
Less Than Twelve Months		$ 846,000
Twelve Months and Over	$ 800,000

LOANS HELD FOR SALE (Details)

LOANS HELD FOR SALE (Details) - USD ($)	3 Months Ended		9 Months Ended
LOANS HELD FOR SALE (Details) - USD ($)	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Fair value and contractual principal outstanding:
Loans held for sale, fair value	$ 17,796,000		$ 17,796,000		$ 18,544,000
Loans held for sale, contractual principal outstanding	17,590,000		17,590,000		18,208,000
Fair value less unpaid principal balance	206,000		206,000		336,000
Change in fair value of mortgage loans held for sale	(165,000)	$ (768,000)	(130,000)	$ (1,600,000)
90 Days or More
Fair value and contractual principal outstanding:
Loans held for sale, fair value	$ 0		$ 0		$ 0

LOANS AND ALLOWANCE FOR CREDI_3

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Balances of Loans (Details) - USD ($)	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Loans
Total loans	$ 4,722,854,000		$ 4,549,670,000
Total loans before basis adjustment	4,724,316,000		4,549,670,000
Basis adjustment associated with fair value hedge	(1,462,000)
Net deferred loan costs	8,300,000		7,400,000
Less: Allowance for credit losses on loans	(48,312,000)	$ (47,821,000)	(45,236,000)	$ (44,621,000)	$ (43,560,000)	$ (45,377,000)
Net loans	4,674,542,000		4,504,434,000
PPP loans \| Commercial and industrial
Loans
Loans before fees	355,000		2,100,000
Deferred processing fee income	50,000		65,000
Residential
Loans
Total loans	1,708,412,000		1,634,319,000
Total loans before basis adjustment	1,708,412,000
Residential \| 1-4 family
Loans
Total loans	1,513,326,000		1,432,263,000
Less: Allowance for credit losses on loans	(12,673,000)	(12,185,000)	(11,532,000)	(10,918,000)	(10,082,000)	(3,631,000)
Residential \| Second mortgages and equity lines of credit
Loans
Total loans	174,814,000		166,219,000
Less: Allowance for credit losses on loans	(1,024,000)	(1,012,000)	(924,000)	(848,000)	(849,000)	(420,000)
Residential \| Residential real estate construction
Loans
Total loans	20,272,000		35,837,000
Less: Allowance for credit losses on loans	(466,000)	(630,000)	(280,000)	(294,000)	(327,000)	(69,000)
Commercial
Loans
Total loans	2,991,657,000		2,873,930,000
Commercial \| Commercial real estate
Loans
Total loans	2,349,886,000		2,250,344,000
Total loans before basis adjustment	2,349,886,000
Less: Allowance for credit losses on loans	(21,501,000)	(20,599,000)	(20,357,000)	(21,155,000)	(20,431,000)	(33,242,000)
Commercial \| Commercial construction
Loans
Total loans	191,224,000		199,311,000
Total loans before basis adjustment	191,224,000
Less: Allowance for credit losses on loans	(4,436,000)	(5,373,000)	(4,645,000)	(4,469,000)	(4,370,000)	(2,010,000)
Commercial \| Commercial and industrial
Loans
Total loans	450,547,000		424,275,000
Total loans before basis adjustment	450,547,000
Less: Allowance for credit losses on loans	(7,976,000)	(7,750,000)	(7,236,000)	(6,690,000)	(7,174,000)	(4,638,000)
Consumer loans
Loans
Total loans	24,247,000		41,421,000
Total loans before basis adjustment	24,247,000
Less: Allowance for credit losses on loans	(236,000)	$ (272,000)	(262,000)	$ (247,000)	$ (327,000)	$ (367,000)
Consumer loans \| Auto
Loans
Total loans	15,797,000		33,625,000
Consumer loans \| Personal
Loans
Total loans	$ 8,450,000		$ 7,796,000

LOANS AND ALLOWANCE FOR CREDI_4

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans Sold or Transferred (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Commercial real estate
Loans
Unpaid principal balance of loans serviced for others	$ 397.6	$ 366.4

LOANS AND ALLOWANCE FOR CREDI_5

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	$ 47,821	$ 43,560	$ 45,236	$ 45,377
Charge-offs	(37)	(253)	(3,039)	(3,111)
Recoveries	55	1,052	398	1,685
Provision	473	262	5,717	1,981
Balance	48,312	44,621	48,312	44,621
ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		(1,311)		(1,311)
Residential \| 1-4 family
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	12,185	10,082	11,532	3,631
Recoveries		2	2	2
Provision	488	834	1,139	2,087
Balance	12,673	10,918	12,673	10,918
Residential \| 1-4 family \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		5,198		5,198
Residential \| Second mortgages and equity lines of credit
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	1,012	849	924	420
Recoveries	40	15	83	108
Provision	(28)	(16)	17	(71)
Balance	1,024	848	1,024	848
Residential \| Second mortgages and equity lines of credit \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		391		391
Residential \| Residential real estate construction
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	630	327	280	69
Provision	(164)	(33)	186	40
Balance	466	294	466	294
Residential \| Residential real estate construction \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		185		185
Commercial \| Commercial real estate
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	20,599	20,431	20,357	33,242
Charge-offs		(24)	(2,918)	(2,810)
Recoveries	2	7	4	13
Provision	900	741	4,058	904
Balance	21,501	21,155	21,501	21,155
Commercial \| Commercial real estate \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		(10,194)		(10,194)
Commercial \| Commercial construction
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	5,373	4,370	4,645	2,010
Provision	(937)	99	(209)	761
Balance	4,436	4,469	4,436	4,469
Commercial \| Commercial construction \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		1,698		1,698
Commercial \| Commercial and industrial
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	7,750	7,174	7,236	4,638
Charge-offs	(16)	(205)	(51)	(246)
Recoveries		1,021	275	1,495
Provision	242	(1,300)	516	(1,485)
Balance	7,976	6,690	7,976	6,690
Commercial \| Commercial and industrial \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		2,288		2,288
Consumer loans
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance	272	327	262	367
Charge-offs	(21)	(24)	(70)	(55)
Recoveries	13	7	34	67
Provision	(28)	(63)	10	(255)
Balance	$ 236	247	$ 236	247
Consumer loans \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		123		123
Unallocated
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance				1,000
Unallocated \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses and allocation of the allowance to loan segments
Balance		$ (1,000)		$ (1,000)

LOANS AND ALLOWANCE FOR CREDI_6

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Carrying value (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying value	$ 18,700,000	$ 23,800,000
Related Allowance	200,000	203,000
Collateral Dependent
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying value	18,534,000	15,862,000
Related Allowance	197,000	8,000
Residential \| Collateral Dependent
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying value	7,741,000	10,494,000
Related Allowance	1,000	1,000
Commercial \| Collateral Dependent
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying value	10,793,000	5,368,000
Related Allowance	196,000	7,000
Commercial \| Commercial real estate \| Collateral Dependent
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying value	8,811,000	2,039,000
Related Allowance	5,000
Commercial \| Commercial and industrial \| Collateral Dependent
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying value	1,982,000	3,329,000
Related Allowance	$ 191,000	$ 7,000

LOANS AND ALLOWANCE FOR CREDI_7

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Past Due and Non-Accrual Loans (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 item	Sep. 30, 2022 item	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Summary of past due and non-accrual loans
Total loans			$ 4,722,854	$ 4,549,670
Loans on Non-accrual			18,783	14,786
Loans past due 90 days or more and still accruing			$ 0	0
Borrowers experiencing financial difficulty	0	0	0
Number of loan modifications \| item	1	1
Total Past Due
Summary of past due and non-accrual loans
Total loans			$ 15,925	15,425
30 to 59 Days
Summary of past due and non-accrual loans
Total loans			2,691	4,510
60 to 89 Days
Summary of past due and non-accrual loans
Total loans			1,435	1,122
90 Days or More
Summary of past due and non-accrual loans
Total loans			11,799	9,793
Residential
Summary of past due and non-accrual loans
Total loans			1,708,412	1,634,319
Residential \| 1-4 family
Summary of past due and non-accrual loans
Total loans			1,513,326	1,432,263
Loans on Non-accrual			7,498	8,927
Residential \| 1-4 family \| Total Past Due
Summary of past due and non-accrual loans
Total loans			6,264	10,761
Residential \| 1-4 family \| 30 to 59 Days
Summary of past due and non-accrual loans
Total loans			2,078	3,711
Residential \| 1-4 family \| 60 to 89 Days
Summary of past due and non-accrual loans
Total loans			1,168	524
Residential \| 1-4 family \| 90 Days or More
Summary of past due and non-accrual loans
Total loans			3,018	6,526
Residential \| Second mortgages and equity lines of credit
Summary of past due and non-accrual loans
Total loans			174,814	166,219
Loans on Non-accrual			453	421
Residential \| Second mortgages and equity lines of credit \| Total Past Due
Summary of past due and non-accrual loans
Total loans			613	601
Residential \| Second mortgages and equity lines of credit \| 30 to 59 Days
Summary of past due and non-accrual loans
Total loans			171	407
Residential \| Second mortgages and equity lines of credit \| 60 to 89 Days
Summary of past due and non-accrual loans
Total loans			137	5
Residential \| Second mortgages and equity lines of credit \| 90 Days or More
Summary of past due and non-accrual loans
Total loans			305	189
Commercial
Summary of past due and non-accrual loans
Total loans			2,991,657	2,873,930
Commercial \| Commercial real estate
Summary of past due and non-accrual loans
Total loans			2,349,886	2,250,344
Loans on Non-accrual			8,811	2,039
Commercial \| Commercial real estate \| Total Past Due
Summary of past due and non-accrual loans
Total loans			7,004	120
Commercial \| Commercial real estate \| 90 Days or More
Summary of past due and non-accrual loans
Total loans			7,004	120
Commercial \| Commercial construction
Summary of past due and non-accrual loans
Total loans			191,224	199,311
Commercial \| Commercial and industrial
Summary of past due and non-accrual loans
Total loans			450,547	424,275
Loans on Non-accrual			1,980	3,329
Commercial \| Commercial and industrial \| Total Past Due
Summary of past due and non-accrual loans
Total loans			1,808	3,419
Commercial \| Commercial and industrial \| 30 to 59 Days
Summary of past due and non-accrual loans
Total loans			274	26
Commercial \| Commercial and industrial \| 60 to 89 Days
Summary of past due and non-accrual loans
Total loans			97	492
Commercial \| Commercial and industrial \| 90 Days or More
Summary of past due and non-accrual loans
Total loans			1,437	2,901
Consumer loans
Summary of past due and non-accrual loans
Total loans			24,247	41,421
Consumer loans \| Auto
Summary of past due and non-accrual loans
Total loans			15,797	33,625
Loans on Non-accrual			31	64
Consumer loans \| Auto \| Total Past Due
Summary of past due and non-accrual loans
Total loans			178	500
Consumer loans \| Auto \| 30 to 59 Days
Summary of past due and non-accrual loans
Total loans			132	348
Consumer loans \| Auto \| 60 to 89 Days
Summary of past due and non-accrual loans
Total loans			16	101
Consumer loans \| Auto \| 90 Days or More
Summary of past due and non-accrual loans
Total loans			30	51
Consumer loans \| Personal
Summary of past due and non-accrual loans
Total loans			8,450	7,796
Loans on Non-accrual			10	6
Consumer loans \| Personal \| Total Past Due
Summary of past due and non-accrual loans
Total loans			58	24
Consumer loans \| Personal \| 30 to 59 Days
Summary of past due and non-accrual loans
Total loans			36	18
Consumer loans \| Personal \| 60 to 89 Days
Summary of past due and non-accrual loans
Total loans			17
Consumer loans \| Personal \| 90 Days or More
Summary of past due and non-accrual loans
Total loans			$ 5	$ 6

LOANS AND ALLOWANCE FOR CREDI_8

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Risk Rating (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) grade	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Loans by risk rating
Number of grades utilized in internal loan rating system \| grade			10
Year one, originated current fiscal year	$ 324,001		$ 324,001		$ 1,411,554
Year two, originated fiscal year before current fiscal year	1,444,425		1,444,425		1,135,920
Year three, originated two years before current fiscal year	1,097,808		1,097,808		549,182
Year four, originated three years before current fiscal year	522,097		522,097		358,789
Year five, originated four years before current fiscal year	324,236		324,236		214,183
Prior	774,206		774,206		645,253
Revolving Loans Amortized Cost	236,089		236,089		233,182
Revolving Loans Converted to Term Loans	1,454		1,454		1,607
Total loans before basis adjustment	4,724,316		4,724,316		4,549,670
Total loans	4,722,854		4,722,854		4,549,670
YTD gross charge-offs, originated current fiscal year			5
YTD gross charge-offs, originated fiscal year before current fiscal year			28
YTD gross charge-offs, originated two years before current fiscal year			18
YTD gross charge-offs, originated three years before current fiscal year			19
YTD gross charge-offs, originated four years before current fiscal year			22
YTD gross charge-offs, prior			2,947
YTD gross charge-offs	37	$ 253	3,039	$ 3,111
Commercial
Loans by risk rating
Total loans	2,991,657		2,991,657		2,873,930
Commercial \| Commercial real estate
Loans by risk rating
Year one, originated current fiscal year	124,574		124,574		817,320
Year two, originated fiscal year before current fiscal year	834,972		834,972		441,277
Year three, originated two years before current fiscal year	454,639		454,639		241,700
Year four, originated three years before current fiscal year	241,605		241,605		263,549
Year five, originated four years before current fiscal year	255,074		255,074		143,825
Prior	439,022		439,022		342,673
Total loans before basis adjustment	2,349,886		2,349,886
Total loans	2,349,886		2,349,886		2,250,344
YTD gross charge-offs, prior			2,918
YTD gross charge-offs		24	2,918	2,810
Commercial \| Commercial real estate \| Pass
Loans by risk rating
Year one, originated current fiscal year	124,574		124,574		817,320
Year two, originated fiscal year before current fiscal year	817,946		817,946		441,277
Year three, originated two years before current fiscal year	454,639		454,639		241,700
Year four, originated three years before current fiscal year	237,296		237,296		254,221
Year five, originated four years before current fiscal year	246,011		246,011		121,351
Prior	415,685		415,685		340,634
Total loans before basis adjustment	2,296,151		2,296,151
Total loans					2,216,503
Commercial \| Commercial real estate \| Special mention
Loans by risk rating
Year two, originated fiscal year before current fiscal year	17,026		17,026
Year four, originated three years before current fiscal year	4,309		4,309		9,328
Year five, originated four years before current fiscal year	9,063		9,063		22,474
Prior	14,526		14,526
Total loans before basis adjustment	44,924		44,924
Total loans					31,802
Commercial \| Commercial real estate \| Substandard
Loans by risk rating
Prior	1,812		1,812		2,039
Total loans before basis adjustment	1,812		1,812
Total loans					2,039
Commercial \| Commercial real estate \| Doubtful
Loans by risk rating
Prior	6,999		6,999
Total loans before basis adjustment	6,999		6,999
Commercial \| Commercial construction
Loans by risk rating
Year one, originated current fiscal year	16,726		16,726		88,173
Year two, originated fiscal year before current fiscal year	115,057		115,057		87,569
Year three, originated two years before current fiscal year	58,048		58,048		11,769
Year four, originated three years before current fiscal year					9,174
Year five, originated four years before current fiscal year					318
Prior					1,487
Revolving Loans Amortized Cost	1,393		1,393		821
Total loans before basis adjustment	191,224		191,224
Total loans	191,224		191,224		199,311
Commercial \| Commercial construction \| Pass
Loans by risk rating
Year one, originated current fiscal year	16,726		16,726		88,173
Year two, originated fiscal year before current fiscal year	115,057		115,057		87,569
Year three, originated two years before current fiscal year	58,048		58,048		11,769
Year four, originated three years before current fiscal year					9,174
Year five, originated four years before current fiscal year					318
Prior					1,487
Revolving Loans Amortized Cost	1,393		1,393		821
Total loans before basis adjustment	191,224		191,224
Total loans					199,311
Commercial \| Commercial and industrial
Loans by risk rating
Year one, originated current fiscal year	53,261		53,261		53,078
Year two, originated fiscal year before current fiscal year	51,636		51,636		95,604
Year three, originated two years before current fiscal year	96,541		96,541		82,173
Year four, originated three years before current fiscal year	75,178		75,178		26,568
Year five, originated four years before current fiscal year	24,001		24,001		37,408
Prior	80,978		80,978		52,255
Revolving Loans Amortized Cost	68,952		68,952		77,189
Total loans before basis adjustment	450,547		450,547
Total loans	450,547		450,547		424,275
YTD gross charge-offs, originated current fiscal year			5
YTD gross charge-offs, originated fiscal year before current fiscal year			18
YTD gross charge-offs, originated two years before current fiscal year			14
YTD gross charge-offs, originated three years before current fiscal year			5
YTD gross charge-offs, originated four years before current fiscal year			8
YTD gross charge-offs, prior			1
YTD gross charge-offs	16	205	51	246
Commercial \| Commercial and industrial \| Pass
Loans by risk rating
Year one, originated current fiscal year	53,242		53,242		53,078
Year two, originated fiscal year before current fiscal year	51,548		51,548		95,600
Year three, originated two years before current fiscal year	96,455		96,455		82,170
Year four, originated three years before current fiscal year	75,178		75,178		26,568
Year five, originated four years before current fiscal year	23,999		23,999		37,358
Prior	78,676		78,676		50,500
Revolving Loans Amortized Cost	68,852		68,852		76,647
Total loans before basis adjustment	447,950		447,950
Total loans					421,921
Commercial \| Commercial and industrial \| Special mention
Loans by risk rating
Year three, originated two years before current fiscal year	5		5
Year five, originated four years before current fiscal year	2		2		49
Prior	610		610		92
Revolving Loans Amortized Cost					492
Total loans before basis adjustment	617		617
Total loans					633
Commercial \| Commercial and industrial \| Substandard
Loans by risk rating
Year one, originated current fiscal year	19		19
Year two, originated fiscal year before current fiscal year	88		88		4
Year three, originated two years before current fiscal year	72		72		3
Year five, originated four years before current fiscal year					1
Prior	385		385		323
Revolving Loans Amortized Cost	50		50
Total loans before basis adjustment	614		614
Total loans					331
Commercial \| Commercial and industrial \| Doubtful
Loans by risk rating
Year three, originated two years before current fiscal year	9		9
Prior	1,307		1,307		1,340
Revolving Loans Amortized Cost	50		50		50
Total loans before basis adjustment	1,366		1,366
Total loans					1,390
Residential
Loans by risk rating
Year one, originated current fiscal year	122,166		122,166		443,034
Year two, originated fiscal year before current fiscal year	436,709		436,709		507,882
Year three, originated two years before current fiscal year	486,044		486,044		211,569
Year four, originated three years before current fiscal year	204,094		204,094		42,515
Year five, originated four years before current fiscal year	40,688		40,688		26,490
Prior	252,534		252,534		247,088
Revolving Loans Amortized Cost	164,723		164,723		154,134
Revolving Loans Converted to Term Loans	1,454		1,454		1,607
Total loans before basis adjustment	1,708,412		1,708,412
Total loans	1,708,412		1,708,412		1,634,319
Residential \| Accrual
Loans by risk rating
Year one, originated current fiscal year	122,166		122,166		443,034
Year two, originated fiscal year before current fiscal year	436,709		436,709		507,679
Year three, originated two years before current fiscal year	486,044		486,044		211,429
Year four, originated three years before current fiscal year	203,962		203,962		42,314
Year five, originated four years before current fiscal year	40,500		40,500		25,232
Prior	245,104		245,104		239,677
Revolving Loans Amortized Cost	164,522		164,522		154,038
Revolving Loans Converted to Term Loans	1,454		1,454		1,568
Total loans before basis adjustment	1,700,461		1,700,461
Total loans					1,624,971
Residential \| Nonaccrual
Loans by risk rating
Year two, originated fiscal year before current fiscal year					203
Year three, originated two years before current fiscal year					140
Year four, originated three years before current fiscal year	132		132		201
Year five, originated four years before current fiscal year	188		188		1,258
Prior	7,430		7,430		7,411
Revolving Loans Amortized Cost	201		201		96
Revolving Loans Converted to Term Loans					39
Total loans before basis adjustment	7,951		7,951
Total loans					9,348
Consumer loans
Loans by risk rating
Year one, originated current fiscal year	7,274		7,274		9,949
Year two, originated fiscal year before current fiscal year	6,051		6,051		3,588
Year three, originated two years before current fiscal year	2,536		2,536		1,971
Year four, originated three years before current fiscal year	1,220		1,220		16,983
Year five, originated four years before current fiscal year	4,473		4,473		6,142
Prior	1,672		1,672		1,750
Revolving Loans Amortized Cost	1,021		1,021		1,038
Total loans before basis adjustment	24,247		24,247
Total loans	24,247		24,247		41,421
YTD gross charge-offs, originated fiscal year before current fiscal year			10
YTD gross charge-offs, originated two years before current fiscal year			4
YTD gross charge-offs, originated three years before current fiscal year			14
YTD gross charge-offs, originated four years before current fiscal year			14
YTD gross charge-offs, prior			28
YTD gross charge-offs	21	$ 24	70	$ 55
Consumer loans \| Accrual
Loans by risk rating
Year one, originated current fiscal year	7,274		7,274		9,948
Year two, originated fiscal year before current fiscal year	6,049		6,049		3,588
Year three, originated two years before current fiscal year	2,536		2,536		1,971
Year four, originated three years before current fiscal year	1,219		1,219		16,955
Year five, originated four years before current fiscal year	4,451		4,451		6,122
Prior	1,662		1,662		1,733
Revolving Loans Amortized Cost	1,015		1,015		1,034
Total loans before basis adjustment	24,206		24,206
Total loans					41,351
Consumer loans \| Nonaccrual
Loans by risk rating
Year one, originated current fiscal year					1
Year two, originated fiscal year before current fiscal year	2		2
Year four, originated three years before current fiscal year	1		1		28
Year five, originated four years before current fiscal year	22		22		20
Prior	10		10		17
Revolving Loans Amortized Cost	6		6		4
Total loans before basis adjustment	$ 41		$ 41
Total loans					$ 70

MORTGAGE LOAN SERVICING - Key A

MORTGAGE LOAN SERVICING - Key Assumptions (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
MORTGAGE LOAN SERVICING
Unpaid principal balances of mortgage loans serviced	$ 3,590	$ 3,620
Prepayment speed	7.20%	7.10%
Discount rate	10.03%	9.81%
Default rate	1.68%	1.63%

MORTGAGE LOAN SERVICING - Fair

MORTGAGE LOAN SERVICING - Fair value of MSR (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Changes to the fair value of Mortgage Servicing Rights
Balance, beginning of period	$ 48,176	$ 47,130	$ 48,138	$ 38,268
Additions	900	915	2,194	3,630
Changes in fair value due to:
Reductions from loans paid off during the period	(644)	(747)	(1,494)	(2,351)
Changes in valuation inputs or assumptions	769	2,563	363	10,314
Balance, end of period	49,201	49,861	49,201	49,861
Fees and commissions, mortgage banking and servicing	$ 1,900	$ 2,000	$ 5,800	$ 6,100
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other	Other	Other	Other

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
GOODWILL AND INTANGIBLE ASSETS
Change in goodwill	$ 0	$ 0
Goodwill	69,802	69,802	$ 69,802
Goodwill impairment	0
Intangible assets	1,704	2,272
HarborOne Mortgage
GOODWILL AND INTANGIBLE ASSETS
Goodwill	10,800	10,800
HarborOne Bank.
GOODWILL AND INTANGIBLE ASSETS
Goodwill	$ 59,000	$ 59,000

DEPOSITS - Summary of deposits

DEPOSITS - Summary of deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
DEPOSITS
NOW and demand deposit accounts	$ 997,988	$ 1,060,268
Regular savings and club accounts	1,324,635	1,468,172
Money market deposit accounts	951,128	861,704
Total non-certificate accounts	3,273,751	3,390,144
Term certificate accounts greater than $250,000	248,736	110,360
Term certificate accounts less than or equal to $250,000	610,530	387,615
Brokered deposits	276,941	301,380
Total certificate accounts	1,136,207	799,355
Total deposits	4,409,958	4,189,499
Total municipal deposits	493,400	413,500
Total reciprocal deposits	$ 177,300	$ 28,600

DEPOSITS - Maturity of deposits

DEPOSITS - Maturity of deposits (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Summary of certificate accounts by maturity
Within 1 year	$ 1,079,547
Over 1 year to 2 years	27,003
Over 2 years to 3 years	26,809
Over 3 years to 4 years	2,467
Over 4 years to 5 years	381
Total certificate accounts	$ 1,136,207	$ 799,355
Summary of certificate accounts by maturity
Within 1 year	4.19%
Over 1 year to 2 years	2.01%
Over 2 years to 3 years	3.06%
Over 3 years to 4 years	0.73%
Over 4 years to 5 years	2.58%
Total certificate deposits	4.10%

BORROWINGS - FHLB Advances (Det

BORROWINGS - FHLB Advances (Details) $ in Thousands	9 Months Ended
BORROWINGS - FHLB Advances (Details) $ in Thousands	Sep. 30, 2023 USD ($) item	Dec. 31, 2022 USD ($)
BORROWINGS
Short-term borrowed funds	$ 250,000	$ 385,000
Weighted average rate	5.52%	4.32%
Number of callable advances \| item	8
Scheduled Maturity
2023		$ 180
2024	$ 13,400	13,400
2025	60,987	987
2026	100,000
2028 and thereafter	51,083	1,108
Total	225,470	$ 15,675
Redeemable at Call Date
2023	90,000
2024	33,400
2025	60,987
2026	40,000
2028 and thereafter	1,083
Total	$ 225,470
Weighted Average Rate
2023		1.40%
2024	1.39%	1.39%
2025	4.32%
2026	4.28%
2028 and thereafter	3.81%	2%
Total	4.01%	1.35%

BORROWINGS - Others (Details)

BORROWINGS - Others (Details) - USD ($)	9 Months Ended
BORROWINGS - Others (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022	Aug. 30, 2018
Borrowed funds
Carrying value of the loans pledged as collateral	$ 4,674,542,000	$ 4,504,434,000
Amount outstanding	0	0
Short-term borrowed funds	250,000,000	385,000,000
BTFP
Borrowed funds
Amount of available borrowing capacity	360,900,000
Short-term borrowed funds	$ 0
Federal Reserve Bank of Boston
Borrowed funds
Percentage of carrying value pledged as collateral	69%
Federal Home Loan Bank Advances
Borrowed funds
Available borrowing capacity	$ 830,700,000
Other Loans
Borrowed funds
Additional borrowing capacity	$ 25,000,000
Subordinated Notes due 2028
Borrowed funds
Notes issued			$ 35,000,000
Current interest rate	8.45%
Issuance costs	$ 620,000	715,000
Asset Pledged as Collateral \| Federal Home Loan Bank Advances
Borrowed funds
Carrying value of the loans pledged as collateral	2,010,000,000	1,710,000,000
Asset Pledged as Collateral \| Federal Home Loan Bank Advances \| Federal Reserve Bank of Boston
Borrowed funds
Carrying value of the loans pledged as collateral	$ 99,100,000	$ 100,200,000

OTHER COMMITMENTS AND CONTING_3

OTHER COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Commitments to grant residential real estate loans - HarborOne Mortgage
OTHER COMMITMENTS AND CONTINGENCIES
Financial instruments committed contract amount	$ 52,370	$ 57,916
Commitments to grant other loans
OTHER COMMITMENTS AND CONTINGENCIES
Financial instruments committed contract amount	63,777	43,700
Unadvanced funds on home equity lines of credit
OTHER COMMITMENTS AND CONTINGENCIES
Financial instruments committed contract amount	255,391	251,759
Unadvanced funds on revolving lines of credit
OTHER COMMITMENTS AND CONTINGENCIES
Financial instruments committed contract amount	318,427	351,382
Unadvanced funds on construction loans
OTHER COMMITMENTS AND CONTINGENCIES
Financial instruments committed contract amount	$ 226,626	$ 262,945

OTHER COMMITMENTS AND CONTING_4

OTHER COMMITMENTS AND CONTINGENCIES - Unfunded commitments (Details) - Unfunded Commitment - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	$ 4,831	$ 5,096	$ 4,927
Provision	(586)	406	(682)	$ 1,571
Ending balance	4,245	5,502	4,245	5,502
Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance				3,931
Residential \| Residential Real Estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	272	337	336
Provision	(4)	(7)	(68)	12
Ending balance	268	330	268	330
Residential \| Residential Real Estate \| Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance				318
Commercial \| Commercial real estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	490	482	628
Provision	(17)	29	(155)	131
Ending balance	473	511	473	511
Commercial \| Commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance				380
Commercial \| Commercial construction
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	3,180	3,638	3,079
Provision	(603)	135	(502)	1,212
Ending balance	2,577	3,773	2,577	3,773
Commercial \| Commercial construction \| Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance				2,561
Commercial \| Commercial and industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	870	624	870
Provision	41	253	41	219
Ending balance	911	877	911	877
Commercial \| Commercial and industrial \| Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance				658
Consumer loans
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	19	15	14
Provision	(3)	(4)	2	(3)
Ending balance	$ 16	$ 11	$ 16	11
Consumer loans \| Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance				$ 14

DERIVATIVES (Details)

DERIVATIVES (Details) $ in Thousands	9 Months Ended
DERIVATIVES (Details) $ in Thousands	Sep. 30, 2023 USD ($) derivative item	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Other assets
Derivative disclosures
Fair Value, Assets	$ 43,022		$ 37,326
Other liabilities
Derivative disclosures
Fair Value, Liabilities	34,000		28,629
Designated as Hedging Instrument \| Other assets
Derivative disclosures
Fair Value, Assets	8,409		8,314
Not designated as hedging instruments \| Other assets
Derivative disclosures
Fair Value, Assets	34,613		29,012
Not designated as hedging instruments \| Other liabilities
Derivative disclosures
Fair Value, Liabilities	$ 34,000		28,629
Derivative loan commitments
Derivative disclosures
Loan commitment specified period	60 days
Derivative loan commitments \| Not designated as hedging instruments
Derivative disclosures
Notional Amount	$ 40,445		27,935
Derivative loan commitments \| Not designated as hedging instruments \| Other assets
Derivative disclosures
Fair Value, Assets	420		238
Derivative loan commitments \| Not designated as hedging instruments \| Other liabilities
Derivative disclosures
Fair Value, Liabilities	111		65
Forward loan sale commitments \| Not designated as hedging instruments
Derivative disclosures
Notional Amount	31,000		29,000
Forward loan sale commitments \| Not designated as hedging instruments \| Other assets
Derivative disclosures
Fair Value, Assets	$ 304		249
Forward loan sale commitments \| Not designated as hedging instruments \| Other liabilities
Derivative disclosures
Fair Value, Liabilities			39
Interest rate swaps \| Designated as Hedging Instrument \| Fair Value Hedging
Derivative disclosures
Number of Derivative Instruments Held \| item	2
Notional Amount	$ 100,000	$ 100,000
Portfolio layer hedged asset	$ 1,230,000
Interest rate swaps \| Designated as Hedging Instrument \| Cash Flow Hedging
Derivative disclosures
Number of Derivative Instruments Held \| derivative	1
Maturity term	1 year 6 months 7 days
Fixed rate	0.671%
Variable rate	5.507%
Amount to be reclassified in next 12 months	$ 4,800
Notional Amount	100,000		100,000
Fair Value, Assets	6,900
Interest rate swaps \| Designated as Hedging Instrument \| Other assets \| Fair Value Hedging
Derivative disclosures
Fair Value, Assets	1,463
Interest rate swaps \| Designated as Hedging Instrument \| Other assets \| Cash Flow Hedging
Derivative disclosures
Fair Value, Assets	6,946		8,314
Interest rate swaps \| Not designated as hedging instruments
Derivative disclosures
Notional Amount	859,275		772,588
Interest rate swaps \| Not designated as hedging instruments \| Other assets
Derivative disclosures
Fair Value, Assets	33,889		28,525
Interest rate swaps \| Not designated as hedging instruments \| Other liabilities
Derivative disclosures
Fair Value, Liabilities	33,889		28,525
Risk Participation Agreements \| Not designated as hedging instruments
Derivative disclosures
Notional Amount	$ 182,347		$ 164,528

DERIVATIVES - Cumulative basis

DERIVATIVES - Cumulative basis adjustment for fair value hedges (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Fair Value Hedging \| Designated as Hedging Instrument
Derivative disclosures
Carrying Amount of the Hedged Assets	$ 98,538
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets	$ (1,462)
Interest rate swaps
Derivative disclosures
Hedged Asset, Statement of Financial Position [Extensible Enumeration]	Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss
Interest rate swaps \| Fair Value Hedging \| Designated as Hedging Instrument
Derivative disclosures
Carrying Amount of the Hedged Assets	$ 98,538
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets	(1,462)
Amortized cost	1,230,000
Designated amount of hedged items	$ 100,000

DERIVATIVES - Net gain and loss

DERIVATIVES - Net gain and losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative [Line Items]
(Loss) gain in OCI on derivatives (effective portion), net of tax	$ (10,699)	$ (14,414)	$ (9,907)	$ (47,044)
Designated as Hedging Instrument
Derivative [Line Items]
(Loss) gain in OCI on derivatives (effective portion), net of tax	(448)	1,610	(983)	5,038
Gain (loss) reclassified from OCI into interest expense (effective portion)	1,221	$ 420	3,373	$ 380
Total	8		1
Designated as Hedging Instrument \| Derivative loan commitments
Derivative [Line Items]
Total	$ (1,018)		$ (1,462)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating
Designated as Hedging Instrument \| Interest rate swaps
Derivative [Line Items]
Total	$ 1,026		$ 1,463
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating
Not designated as hedging instruments
Derivative [Line Items]
Total	$ (84)	$ 771	$ 231	$ 812
Not designated as hedging instruments \| Derivative loan commitments
Derivative [Line Items]
Total	$ (129)	$ (606)	$ 137	$ (874)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Mortgage Banking Noninterest Income	Mortgage Banking Noninterest Income	Mortgage Banking Noninterest Income	Mortgage Banking Noninterest Income
Not designated as hedging instruments \| Forward loan sale commitments
Derivative [Line Items]
Total	$ 45	$ 1,377	$ 94	$ 1,356
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Mortgage Banking Noninterest Income	Mortgage Banking Noninterest Income	Mortgage Banking Noninterest Income	Mortgage Banking Noninterest Income
Not designated as hedging instruments \| Interest rate swaps
Derivative [Line Items]
Total				$ 330
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income

DERIVATIVES - Offsetting (Detai

DERIVATIVES - Offsetting (Details) - Interest rate swaps $ in Thousands	Sep. 30, 2023 USD ($)
Designated as Hedging Instrument \| Fair Value Hedging
Derivative disclosures
Gross Amounts of Recognized Assets	$ 1,463
Net Amounts Presented in the Statement of Financial Position	1,463
Net Amounts Not Offset	1,463
Designated as Hedging Instrument \| Cash Flow Hedging
Derivative disclosures
Gross Amounts of Recognized Assets	6,946
Net Amounts Presented in the Statement of Financial Position	6,946
Gross Amounts Not Offset - Cash Collateral	(6,946)
Not designated as hedging instruments
Derivative disclosures
Gross Amounts of Recognized Assets	33,824
Net Amounts Presented in the Statement of Financial Position	33,824
Gross Amounts Not Offset - Cash Collateral	(37,054)
Net Amounts Not Offset	$ (3,230)

OPERATING LEASE ROU ASSETS AN_3

OPERATING LEASE ROU ASSETS AND LIABILITIES (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Operating lease ROU assets	$ 23,500,000	$ 26,900,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets.	Other Assets.
Operating lease liabilities	$ 25,163,000	$ 28,600,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]	hone:OtherLiabilitiesAndAccruedExpensesMember	hone:OtherLiabilitiesAndAccruedExpensesMember
Lessee, Operating Lease, Lease Not Yet Commenced Amount	$ 0	$ 0
Weighted-average remaining lease term (years)	16 years 3 months	17 years 3 months 29 days
Minimum
Lessee, Operating Lease, Remaining Lease Term	2 months	3 months
Maximum
Lessee, Operating Lease, Remaining Lease Term	34 years 10 months 24 days	35 years 8 months 12 days

OPERATING LEASE ROU ASSETS AN_4

OPERATING LEASE ROU ASSETS AND LIABILITIES - Maturities Due (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2023	$ 760
2024	2,827
2025	2,552
2026	2,505
2027	2,445
Thereafter	19,421
Total lease payments	30,510
Imputed interest	(5,347)
Total present value of operating lease liabilities	$ 25,163	$ 28,600

OPERATING LEASE ROU ASSETS AN_5

OPERATING LEASE ROU ASSETS AND LIABILITIES - Weighted average discount and remaining lease term (Details)	Sep. 30, 2023	Dec. 31, 2022
OPERATING LEASE ROU ASSETS AND LIABILITIES
Weighted-average discount rate	2.08%	2.02%
Weighted-average remaining lease term (years)	16 years 3 months	17 years 3 months 29 days

OPERATING LEASE ROU ASSETS AN_6

OPERATING LEASE ROU ASSETS AND LIABILITIES - Lease expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
OPERATING LEASE ROU ASSETS AND LIABILITIES
Operating lease expense	$ 766	$ 836	$ 2,365	$ 2,472
Short-term lease expense	40	37	105	105
Variable lease expense	5		10
Sublease income	(3)	(4)	(12)	(9)
Total lease expense	808	869	2,468	2,568
Other Information
Cash paid for amounts included in the measurement of lease liabilities-operating cash flows for operating leases	768	845	2,382	2,446
Operating Lease - Operating cash flows (Liability reduction)	$ 640	701	1,975	2,041
ROU assets obtained in exchange for new operating lease liabilities		$ 77	$ 596	$ 1,160

MINIMUM REGULATORY CAPITAL RE_3

MINIMUM REGULATORY CAPITAL REQUIREMENTS (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations
Common equity Tier 1 capital conversation buffer ratio	0.025
Applicable capital conversation buffer ratio	0.025
Common equity Tier 1 to risk-weighted assets
Actual, Capital amount	$ 570,586	$ 592,610
Actual, Ratio	0.120	0.128
Minimum Requirement for Capital Adequacy Purposes	$ 213,499	$ 208,541
Minimum Requirement for Capital Adequacy Purposes, ratio	0.045	0.045
Tier 1 capital to risk weighted assets
Actual, Capital amount	$ 570,586	$ 592,610
Actual, Ratio	0.120	0.128
Minimum Requirement for Capital Adequacy Purposes	$ 284,665	$ 278,054
Minimum Requirement for Capital Adequacy Purposes, ratio	0.060	0.060
Total capital to risk-weighted assets
Actual, Capital amount	$ 651,143	$ 677,774
Actual, Ratio	0.137	0.146
Minimum Requirement for Capital Adequacy Purposes	$ 379,554	$ 370,739
Minimum Requirement for Capital Adequacy Purposes, ratio	0.080	0.080
Tier 1 capital to average assets
Actual, Capital amount	$ 570,586	$ 592,610
Actual, Ratio	0.101	0.115
Minimum Requirement for Capital Adequacy Purposes	$ 224,874	$ 205,897
Minimum Requirement for Capital Adequacy Purposes, ratio	0.040	0.040
HarborOne Bank.
Common equity Tier 1 to risk-weighted assets
Actual, Capital amount	$ 543,025	$ 525,522
Actual, Ratio	0.115	0.113
Minimum Requirement for Capital Adequacy Purposes	$ 213,410	$ 208,447
Minimum Requirement for Capital Adequacy Purposes, ratio	0.045	0.045
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions	$ 308,259	$ 301,090
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions, ratio	0.065	0.065
Tier 1 capital to risk weighted assets
Actual, Capital amount	$ 543,025	$ 525,522
Actual, Ratio	0.115	0.113
Minimum Requirement for Capital Adequacy Purposes	$ 284,547	$ 277,929
Minimum Requirement for Capital Adequacy Purposes, ratio	0.060	0.060
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions	$ 379,396	$ 370,572
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions, ratio	0.080	0.080
Total capital to risk-weighted assets
Actual, Capital amount	$ 595,582	$ 575,686
Actual, Ratio	0.126	0.124
Minimum Requirement for Capital Adequacy Purposes	$ 379,396	$ 370,572
Minimum Requirement for Capital Adequacy Purposes, ratio	0.080	0.080
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions	$ 474,245	$ 463,215
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions, ratio	0.100	0.100
Tier 1 capital to average assets
Actual, Capital amount	$ 543,025	$ 525,522
Actual, Ratio	0.097	0.102
Minimum Requirement for Capital Adequacy Purposes	$ 224,848	$ 205,874
Minimum Requirement for Capital Adequacy Purposes, ratio	0.040	0.040
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions	$ 281,060	$ 257,342
Minimum Required to be Considered "Well Capitalized" Under Prompt Corrective Action Provisions, ratio	0.050	0.050

COMPREHENSIVE (LOSS) INCOME - C

COMPREHENSIVE (LOSS) INCOME - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 595,532	$ 624,478	$ 616,976	$ 679,261
Balance at end of period	584,634	611,370	584,634	611,370
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(46,290)	(34,267)	(47,082)	(1,637)
Other comprehensive income (loss) before reclassifications	(14,120)	(17,896)	(10,989)	(59,420)
Amounts reclassified from accumulated other comprehensive (loss) income	(1,241)	(420)	(3,432)	(380)
Net current period other comprehensive (loss) income	(15,361)	(18,316)	(14,421)	(59,800)
Related tax effect	4,662	3,902	4,514	12,756
Balance at end of period	(56,989)	(48,681)	(56,989)	(48,681)
Securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(51,847)	(38,892)	(53,212)	(2,834)
Other comprehensive income (loss) before reclassifications	(14,718)	(20,554)	(12,995)	(66,806)
Net current period other comprehensive (loss) income	(14,718)	(20,554)	(12,995)	(66,806)
Related tax effect	4,487	4,530	4,129	14,724
Balance at end of period	(62,078)	(54,916)	(62,078)	(54,916)
Cash flow hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	5,445	4,625	5,980	1,197
Other comprehensive income (loss) before reclassifications	598	2,658	2,005	7,386
Amounts reclassified from accumulated other comprehensive (loss) income	(1,221)	(420)	(3,373)	(380)
Net current period other comprehensive (loss) income	(623)	2,238	(1,368)	7,006
Related tax effect	175	(628)	385	(1,968)
Balance at end of period	4,997	$ 6,235	4,997	$ 6,235
Postretirement Benefit
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	112		150
Other comprehensive income (loss) before reclassifications			1
Amounts reclassified from accumulated other comprehensive (loss) income	(20)		(59)
Net current period other comprehensive (loss) income	(20)		(58)
Balance at end of period	$ 92		$ 92

FAIR VALUE OF ASSETS AND LIAB_3

FAIR VALUE OF ASSETS AND LIABILITIES (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Assets and liabilities measured on recurring basis
Fair Value	$ 271,078,000	$ 301,149,000
Derivative loan commitments
Assets and liabilities measured on recurring basis
Weighted average pull-through rate	93%	91%
Recurring
Assets and liabilities measured on recurring basis
Fair Value	$ 271,078,000	$ 301,149,000
Recurring \| Level 1
Assets and liabilities measured on recurring basis
Fair Value	0	0
Recurring \| Level 2
Assets and liabilities measured on recurring basis
Fair Value	271,078,000	301,149,000
Recurring \| Level 3
Assets and liabilities measured on recurring basis
Fair Value	0	0
90 Days or More \| Recurring \| Level 2
Assets and liabilities measured on recurring basis
Loans held for sale	$ 0	$ 0

FAIR VALUE OF ASSETS AND LIAB_4

FAIR VALUE OF ASSETS AND LIABILITIES - Recurring basis (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($) item	Dec. 31, 2022 USD ($) item	Jun. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Assets and liabilities measured on recurring basis
Number of transfers \| item	0	0
Assets
Securities available for sale, at fair value	$ 271,078,000	$ 301,149,000
Loans held for sale	17,796,000	18,544,000
Mortgage servicing rights	49,201,000	48,138,000	$ 48,176,000	$ 49,861,000	$ 47,130,000	$ 38,268,000
Recurring
Assets
Securities available for sale, at fair value	271,078,000	301,149,000
Loans held for sale	17,796,000	18,544,000
Mortgage servicing rights	49,201,000	48,138,000
Total assets	381,097,000	405,157,000
Recurring \| Derivative loan commitments
Assets
Derivative assets	43,022,000	37,326,000
Liabilities
Derivative liabilities	34,000,000	28,629,000
Recurring \| Level 1
Assets
Securities available for sale, at fair value	0	0
Recurring \| Level 2
Assets
Securities available for sale, at fair value	271,078,000	301,149,000
Loans held for sale	17,796,000	18,544,000
Mortgage servicing rights	49,201,000	48,138,000
Total assets	380,373,000	404,670,000
Recurring \| Level 2 \| Derivative loan commitments
Assets
Derivative assets	42,298,000	36,839,000
Liabilities
Derivative liabilities	33,889,000	28,525,000
Recurring \| Level 3
Assets
Securities available for sale, at fair value	0	0
Total assets	724,000	487,000
Recurring \| Level 3 \| Derivative loan commitments
Assets
Derivative assets	724,000	487,000
Liabilities
Derivative liabilities	$ 111,000	$ 104,000

FAIR VALUE OF ASSETS AND LIAB_5

FAIR VALUE OF ASSETS AND LIABILITIES - Level 3 (Details) - Derivative and Forward Loan Sale Commitments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Changes in Level 3 assets
Balance at beginning of period	$ 783	$ 1,344	$ 487	$ 1,583
Total gains (losses) included in net income	(59)	891	237	652
Balance at end of period	724	2,235	724	2,235
Changes in unrealized gains relating to instruments at period end	724	2,235	724	2,235
Changes in Level 3 liabilities
Balance at beginning of period	(85)	(239)	(104)	(189)
Total gains (losses) included in net income	(26)	(120)	(7)	(170)
Balance at end of period	(111)	(359)	(111)	(359)
Changes in unrealized losses relating to instruments at period end	$ (111)	$ (359)	$ (111)	$ (359)

FAIR VALUE OF ASSETS AND LIAB_6

FAIR VALUE OF ASSETS AND LIABILITIES - Impaired Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Collateral-dependent impaired loans
Assets and liabilities measured on non-recurring basis
Total Losses	$ 178	$ 92	$ 3,116	$ 840
Level 3 \| Discount \| Residential loans
Assets and liabilities measured on non-recurring basis
Measurement input	0.20		0.20
Level 3 \| Discount \| Commercial real estate
Assets and liabilities measured on non-recurring basis
Measurement input	0.20		0.20
Level 3 \| Discount \| Minimum \| Commercial and industrial
Assets and liabilities measured on non-recurring basis
Measurement input	0.25		0.25
Level 3 \| Discount \| Maximum \| Commercial and industrial
Assets and liabilities measured on non-recurring basis
Measurement input	0.50		0.50
Non-recurring \| Level 3 \| Residential loans
Assets and liabilities measured on non-recurring basis
Assets, Fair value	$ 7,340		$ 7,340		$ 349
Non-recurring \| Level 3 \| Collateral-dependent impaired loans \| Sales Comparison Approach
Assets and liabilities measured on non-recurring basis
Assets, Fair value	$ 7,340		$ 7,340		$ 349

FAIR VALUE OF ASSETS AND LIAB_7

FAIR VALUE OF ASSETS AND LIABILITIES - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial assets:
Cash and cash equivalents	$ 246,784	$ 98,017
Securities available for sale, at fair value	271,078	301,149
Securities held to maturity	18,683	19,274
Federal Home Loan Bank stock	23,378	20,071
Loans held for sale	17,796	18,544
Loans, net	4,674,542	4,504,434
Retirement plan annuities	15,023	14,630
Accrued interest receivable	17,506	15,139
Financial liabilities:
Deposits	4,409,958	4,189,499
Subordinated debt	34,380	34,285
Mortgagors' escrow accounts	10,155	9,537
Accrued interest payable	4,623	2,325
Carrying Amount
Financial assets:
Cash and cash equivalents	246,784	98,017
Securities available for sale, at fair value	271,078	301,149
Securities held to maturity	19,795	19,949
Federal Home Loan Bank stock	23,378	20,071
Loans held for sale	17,796	18,544
Loans, net	4,674,542	4,504,434
Retirement plan annuities	15,023	14,630
Accrued interest receivable	17,506	15,139
Derivatives	43,022	37,326
Financial liabilities:
Deposits	4,409,958	4,189,499
Borrowed funds	475,470	400,675
Subordinated debt	34,380	34,285
Mortgagors' escrow accounts	10,155	9,537
Accrued interest payable	4,623	2,325
Derivatives	34,000	28,629
Fair Value
Financial assets:
Cash and cash equivalents	246,784	98,017
Securities available for sale, at fair value	271,078	301,149
Securities held to maturity	18,683	19,274
Loans held for sale	17,796	18,544
Loans, net	4,451,754	4,383,613
Retirement plan annuities	15,023	14,630
Accrued interest receivable	17,506	15,139
Derivatives	43,022	37,326
Financial liabilities:
Deposits	4,389,434	4,166,796
Borrowed funds	472,875	399,655
Subordinated debt	34,099	28,221
Mortgagors' escrow accounts	10,155	9,537
Accrued interest payable	4,623	2,325
Derivatives	34,000	28,629
Fair Value \| Level 1
Financial assets:
Cash and cash equivalents	246,784	98,017
Fair Value \| Level 2
Financial assets:
Securities available for sale, at fair value	271,078	301,149
Securities held to maturity	18,683	19,274
Loans held for sale	17,796	18,544
Accrued interest receivable	17,506	15,139
Derivatives	42,298	36,839
Financial liabilities:
Borrowed funds	472,875	399,655
Accrued interest payable	4,623	2,325
Derivatives	33,889	28,525
Fair Value \| Level 3
Financial assets:
Loans, net	4,451,754	4,383,613
Retirement plan annuities	15,023	14,630
Derivatives	724	487
Financial liabilities:
Deposits	4,389,434	4,166,796
Subordinated debt	34,099	28,221
Mortgagors' escrow accounts	10,155	9,537
Derivatives	$ 111	$ 104

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
EARNINGS PER SHARE
Net income available to common stockholders (in thousands)	$ 8,412	$ 13,758	$ 23,188	$ 36,012
Average number of common shares outstanding	46,369,111	49,626,152	47,133,894	50,738,918
Less: Average unallocated ESOP shares and non-vested restricted shares	(3,492,218)	(3,795,415)	(3,541,940)	(3,863,606)
Weighted average number of common shares outstanding used to calculate basic earnings per common share	42,876,893	45,830,737	43,591,954	46,875,312
Dilutive effect of share-based compensation	106,584	589,790	201,183	666,335
Weighted average number of common shares outstanding used to calculate diluted earnings per common share	42,983,477	46,420,527	43,793,137	47,541,647
Basic	$ 0.20	$ 0.30	$ 0.53	$ 0.77
Diluted	$ 0.20	$ 0.30	$ 0.53	$ 0.76
Antidilutive securities excluded from computation of earnings per share			1,193,036	4,255

SEGMENT REPORTING (Details)

SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended		9 Months Ended
SEGMENT REPORTING (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information
Number of reportable segments \| segment			2
Net interest and dividend income	$ 31,080	$ 39,332	$ 97,578	$ 109,797
Provision for credit losses	(113)	668	5,036	3,552
Net interest and dividend income, after provision for credit losses	31,193	38,664	92,542	106,245
Mortgage banking income:
Gain on sale of mortgage loans	2,704	3,809	8,228	13,669
Changes in mortgage servicing rights fair value	125	1,816	(1,131)	7,963
Other	2,270	2,453	6,798	7,623
Total mortgage banking income	5,099	8,078	13,895	29,255
Other noninterest income (loss)	6,499	6,167	19,055	18,154
Total noninterest income	11,598	14,245	32,950	47,409
Noninterest expense	31,872	34,473	95,106	104,262
Income before income taxes	10,919	18,436	30,386	49,392
Income tax provision	2,507	4,678	7,198	13,380
Net income	8,412	13,758	23,188	36,012
Total assets at period end	5,664,387	4,987,643	5,664,387	4,987,643	$ 5,359,545
Goodwill at period end	69,802	69,802	69,802	69,802	$ 69,802
Operating Segments \| HarborOne Bank
Segment Reporting Information
Net interest and dividend income	31,468	39,373	98,520	110,043
Provision for credit losses	(113)	668	5,036	3,552
Net interest and dividend income, after provision for credit losses	31,581	38,705	93,484	106,491
Mortgage banking income:
Intersegment gain (loss)	(198)	(904)	(904)	(2,607)
Changes in mortgage servicing rights fair value	18	164	(89)	881
Other	188	218	584	670
Total mortgage banking income	8	(522)	(409)	(1,056)
Other noninterest income (loss)	6,503	6,180	19,059	18,151
Total noninterest income	6,511	5,658	18,650	17,095
Noninterest expense	26,272	27,707	78,655	81,663
Income before income taxes	11,820	16,656	33,479	41,923
Income tax provision	2,716	4,166	8,024	11,273
Net income	9,104	12,490	25,455	30,650
Total assets at period end	5,672,956	5,000,963	5,672,956	5,000,963
Goodwill at period end	59,042	59,042	59,042	59,042
Operating Segments \| HarborOne Mortgage.
Segment Reporting Information
Net interest and dividend income	199	437	646	1,198
Net interest and dividend income, after provision for credit losses	199	437	646	1,198
Mortgage banking income:
Gain on sale of mortgage loans	2,704	3,809	8,228	13,669
Intersegment gain (loss)	249	698	793	2,632
Changes in mortgage servicing rights fair value	107	1,652	(1,042)	7,082
Other	2,082	2,235	6,214	6,953
Total mortgage banking income	5,142	8,394	14,193	30,336
Other noninterest income (loss)	(4)	(13)	(4)	3
Total noninterest income	5,138	8,381	14,189	30,339
Noninterest expense	5,490	6,610	16,305	21,613
Income before income taxes	(153)	2,208	(1,470)	9,924
Income tax provision	(15)	687	(348)	2,777
Net income	(138)	1,521	(1,122)	7,147
Total assets at period end	113,619	132,431	113,619	132,431
Goodwill at period end	$ 10,760	$ 10,760	$ 10,760	$ 10,760

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 8,412	$ 13,758	$ 23,188	$ 36,012

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false