Randolph Bancorp (RNDB) 10-Q 4 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 31, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Trading Symbol	RNDB
Entity Registrant Name	Randolph Bancorp, Inc.
Entity Central Index Key	0001667161
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Security Exchange Name	NASDAQ
Title of 12(b) Security	Common Stock, par value $.01 per share
Entity Incorporation, State or Country Code	MA
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		5,100,276
Entity Shell Company	false
Entity File Number	001-37780
Entity Tax Identification Number	81-1844402
Entity Address, Address Line One	2 Batterymarch Park
Entity Address, Address Line Two	Suite 301
Entity Address, City or Town	Quincy
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02169
City Area Code	781
Local Phone Number	963-2100
Document Quarterly Report	true
Document Transition Report	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 3,696	$ 4,206
Interest-bearing deposits	9,180	9,568
Total cash and cash equivalents	12,876	13,774
Securities available for sale, at fair value	51,725	55,366
Loans held for sale, at fair value	75,400	119,112
Loans, net of allowance for loan losses of $6,432 in 2021 and $6,784 in 2020	564,619	483,644
Federal Home Loan Bank of Boston stock, at cost	3,239	3,576
Accrued interest receivable	1,763	1,562
Mortgage servicing rights, net	15,402	12,377
Premises and equipment, net	6,462	4,781
Bank-owned life insurance	8,744	8,622
Foreclosed real estate		132
Other assets	10,867	18,126
Total assets	751,097	721,072
Deposits:
Non-interest bearing	134,058	96,731
Interest-bearing	439,347	431,576
Total deposits	573,405	528,307
Federal Reserve Bank advances		11,431
Federal Home Loan Bank of Boston advances	62,900	61,895
Mortgagors' escrow accounts	1,905	2,338
Post-employment benefit obligations	2,182	2,382
Other liabilities	10,108	14,900
Total liabilities	650,500	621,253
Commitments and contingencies (Note 14)
Stockholders' Equity:
Preferred stock, no par value; authorized: 1,000,000 shares; issued: none
Common stock, $.01 par value; authorized: 15,000,000 shares; issued and outstanding: 5,103,619 shares at September 30, 2021 and 5,495,514 shares at December 31, 2020	50	54
Additional paid-in capital	43,574	50,937
Retained earnings	60,504	51,689
ESOP-Unearned compensation	(3,615)	(3,756)
Accumulated other comprehensive income, net of tax	84	895
Total stockholders' equity	100,597	99,819
Total liabilities and stockholders' equity	$ 751,097	$ 721,072

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Loans, allowance for loan losses	$ 6,432	$ 6,784
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	5,103,619	5,495,514
Common stock, shares outstanding	5,103,619	5,495,514

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest and dividend income:
Loans	$ 6,226	$ 5,337	$ 17,239	$ 16,680
Securities-taxable	219	297	682	990
Securities-tax exempt	4	7	16	22
Interest-bearing deposits and certificates of deposit	4	7	19	68
Total interest and dividend income	6,453	5,648	17,956	17,760
Interest expense:
Deposits	299	730	1,082	3,237
Borrowings	178	249	608	696
Total interest expense	477	979	1,690	3,933
Net interest income	5,976	4,669	16,266	13,827
Provision (credit) for loan losses	(90)	546	(330)	2,338
Net interest income after provision (credit) for loan losses	6,066	4,123	16,596	11,489
Non-interest income:
Customer service fees	410	330	1,196	902
Gain on loan origination and sale activities, net	7,229	18,102	23,962	39,616
Mortgage servicing fees, net	274	1,180	1,434	(1,428)
Increase in cash surrender value of life insurance	41	46	122	136
Other	195	216	674	598
Total non-interest income	8,149	19,874	27,388	39,824
Non-interest expenses:
Salaries and employee benefits	6,381	7,911	22,128	24,439	[1]
Occupancy and equipment	714	859	2,079	2,395
Data processing	367	242	931	663
Professional fees	490	253	1,374	888
Marketing	134	154	504	458
FDIC insurance	54	41	162	136
Other	1,719	1,591	5,259	4,410
Total non-interest expenses	9,859	11,051	32,437	33,389
Income before income taxes	4,356	12,946	11,547	17,924
Income tax expense	1,230	2,661	2,732	3,266
Net income	$ 3,126	$ 10,285	$ 8,815	$ 14,658
Earnings per common share:
Basic	$ 0.64	$ 2.01	$ 1.78	$ 2.86
Diluted	$ 0.62	$ 2.01	$ 1.71	$ 2.86
Weighted average shares outstanding:
Basic	4,869,155	5,120,367	4,948,137	5,123,705
Diluted	5,074,676	5,120,367	5,153,548	5,126,077
[1]	Salaries and benefits for the nine months ended September 30, 2020, include the severance and vested stock acceleration costs related to the retirement of the Chief Executive Officer and Chief Financial Officer of the Bank. Total cost of this event was $1.38 million, of which $1.03 million was allocated to the Bank segment and the remainder, $344,000 was allocated to the mortgage segment.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income		$ 3,126	$ 10,285	$ 8,815	$ 14,658
Reclassifications adjustments
Unrealized holding gains (losses)		(160)	(108)	(952)	1,613
Related tax effects		38		129
Net-of-tax amount		(122)	(108)	(823)	1,613
Related tax effects		0	0	0	0
Net-of-tax amount		4	(3)	12	(9)
Total other comprehensive income (loss)		(118)	(111)	(811)	1,604
Comprehensive income		3,008	10,174	8,004	16,262
Supplemental Retirement Plan [Member]
Reclassifications adjustments
Actuarial losses	[1]	12	9	36	27
Prior service credits	[1]	(8)	(12)	(24)	(36)
Net change in supplemental retirement plan		$ 4	$ (3)	$ 12	$ (9)
[1]	Amounts are included in other non-interest expenses in the consolidated statements of operations.

Consolidated Statements Changes

Consolidated Statements Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Unearned Compensation ESOP [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2019	$ 78,462	$ 56	$ 51,127	$ 31,757	$ (3,944)	$ (534)
Beginning balance, shares at Dec. 31, 2019		5,576,855
Net income	14,658			14,658
Other comprehensive income (loss)	1,604					1,604
Stock repurchased	(1,217)	$ (1)	(1,216)
Stock repurchased, shares		(101,131)
Restricted stock awards granted, shares		63,130
Restricted stock awards forfeited, shares		(9,251)
Share redemption for tax withholdings for restricted stock vesting	(60)		(60)
Share redemption for tax withholdings for restricted stock vesting, shares		(5,213)
Stock-based compensation	1,327		1,327
ESOP shares committed to be released	164		23		141
Ending balance at Sep. 30, 2020	94,938	$ 55	51,201	46,415	(3,803)	1,070
Ending balance, shares at Sep. 30, 2020		5,524,390
Beginning balance at Dec. 31, 2019	78,462	$ 56	51,127	31,757	(3,944)	(534)
Beginning balance, shares at Dec. 31, 2019		5,576,855
Ending balance at Dec. 31, 2020	99,819	$ 54	50,937	51,689	(3,756)	895
Ending balance, shares at Dec. 31, 2020		5,495,514
Beginning balance at Jun. 30, 2020	84,529	$ 55	51,013	36,130	(3,850)	1,181
Beginning balance, shares at Jun. 30, 2020		5,479,884
Net income	10,285			10,285
Other comprehensive income (loss)	(111)					(111)
Stock repurchased	(16)		(16)
Stock repurchased, shares		(1,624)
Restricted stock awards granted, shares		48,130
Restricted stock awards forfeited, shares		(2,000)
Stock-based compensation	199		199
ESOP shares committed to be released	52		5		47
Ending balance at Sep. 30, 2020	94,938	$ 55	51,201	46,415	(3,803)	1,070
Ending balance, shares at Sep. 30, 2020		5,524,390
Beginning balance at Dec. 31, 2020	99,819	$ 54	50,937	51,689	(3,756)	895
Beginning balance, shares at Dec. 31, 2020		5,495,514
Net income	8,815			8,815
Other comprehensive income (loss)	(811)					(811)
Stock repurchased	(8,349)	$ (4)	(8,345)
Stock repurchased, shares		(408,525)
Restricted stock awards granted, shares		19,750
Restricted stock awards forfeited, shares		(1,056)
Share redemption for tax withholdings for restricted stock vesting	(47)		(47)
Share redemption for tax withholdings for restricted stock vesting, shares		(2,398)
Stock-based compensation	873		873
ESOP shares committed to be released	292		151		141
Proceeds from exercise of options, net	$ 5		5
Proceeds from exercise of options, net, shares	334	334
Ending balance at Sep. 30, 2021	$ 100,597	$ 50	43,574	60,504	(3,615)	84
Ending balance, shares at Sep. 30, 2021		5,103,619
Beginning balance at Jun. 30, 2021	100,710	$ 52	46,740	57,378	(3,662)	202
Beginning balance, shares at Jun. 30, 2021		5,254,522
Net income	3,126			3,126
Other comprehensive income (loss)	(118)					(118)
Stock repurchased	(3,535)	$ (2)	(3,533)
Stock repurchased, shares		(168,733)
Restricted stock awards granted, shares		19,750
Restricted stock awards forfeited, shares		(1,056)
Share redemption for tax withholdings for restricted stock vesting	(24)		(24)
Share redemption for tax withholdings for restricted stock vesting, shares		(1,198)
Stock-based compensation	336		336
ESOP shares committed to be released	97		50		47
Proceeds from exercise of options, net	5		5
Proceeds from exercise of options, net, shares		334
Ending balance at Sep. 30, 2021	$ 100,597	$ 50	$ 43,574	$ 60,504	$ (3,615)	$ 84
Ending balance, shares at Sep. 30, 2021		5,103,619

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 8,815,000	$ 14,658,000
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Provision (credit) for loan losses	(330,000)	2,338,000
Loans originated for sale	(1,064,047,000)	(1,144,058,000)
Net gain on sales of mortgage loans	(23,962,000)	(43,539,000)
Proceeds from sales of mortgage loans	1,133,536,000	1,158,237,000
Net amortization of securities	295,000	218,000
Net change in deferred loan costs and fees, and purchase premiums	93,000	324,000
Depreciation and amortization	533,000	1,028,000
Loss on sale of foreclosed assets	5,000
Stock-based compensation	873,000	1,327,000
ESOP expense	292,000	164,000
Increase in cash surrender value of life insurance	(122,000)	(136,000)
Net (increase) decrease in mortgage servicing rights	(3,025,000)	(2,388,000)
Other, net	4,314,000	545,000
Net cash provided by (used in) operating activities	57,270,000	(11,282,000)
Cash flows from investing activities:
Redemptions of certificates of deposit		490,000
Securities available for sale:
Purchases	(9,780,000)	(11,543,000)
Calls/maturities	1,445,000	4,500,000
Principal payments on mortgage-backed securities	10,729,000	10,390,000
Net loan originations	(82,884,000)	(10,155,000)
Loan purchases	(1,822,000)	(1,519,000)
Redemptions (purchases) of Federal Home Loan Bank of Boston stock	337,000	(1,380,000)
Purchases of premises and equipment	(2,236,000)	(503,000)
Proceeds from the sale of foreclosed real estate	127,000
Loss on disposal of assets	21,000	90,000
Net cash used in investing activities	(84,063,000)	(9,630,000)
Cash flows from financing activities:
Net increase in non-interest bearing deposits	37,327,000	31,749,000
Net increase (decrease) in interest-bearing deposits	7,771,000	(6,506,000)
Net increase (decrease) in short-term Federal Reserve Bank borrowings	(11,431,000)	15,318,000
Net increase (decrease) in short-term Federal Home Loan Bank of Boston borrowings	17,892,000	(14,822,000)
Issuance of long-term Federal Home Loan Bank of Boston advances	5,000,000	40,000,000
Repayments of long-term Federal Home Loan Bank of Boston advances	(21,887,000)	(2,678,000)
Net decrease in mortgagors' escrow accounts	(433,000)	(93,000)
Repurchases of common stock	(8,349,000)	(1,217,000)
Proceeds from exercise of stock options	5,000
Net cash provided by financing activities	25,895,000	61,751,000
Net change in cash and cash equivalents	(898,000)	40,839,000
Cash and cash equivalents at beginning of period	13,774,000	8,252,000
Cash and cash equivalents at end of period	12,876,000	49,091,000
Supplemental cash flow information:
Interest paid on deposits and borrowed funds	1,884,000	4,225,000
Income taxes paid	2,257,000	1,025,000
Non-cash item:
Transfer of held for sale loans to portfolio	9,449,000	6,537,000
Transfer of portfolio loans to loans held for sale	$ 13,417,000
Transfer of portfolio loan to foreclosed real estate		$ 132,000

Basis of Financial Statement Pr

Basis of Financial Statement Presentation	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Financial Statement Presentation	1. BASIS OF FINANCIAL STATEMENT PRESENTATION The unaudited consolidated financial statements include the accounts of Randolph Bancorp, Inc. (“Bancorp”) and its wholly-owned subsidiary, Envision Bank (the “Bank”, together with Bancorp, the “Company”). The Bank has subsidiaries involved in owning investment securities and foreclosed real estate properties and a subsidiary which provides loan closing services. All intercompany accounts and transactions have been eliminated in consolidation. When necessary, certain amounts in prior year financial statements have been reclassified to conform to the current year’s presentation. These unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial reporting and with the instructions to Form 10-Q and Article 10 of Regulation S-X issued by the Securities and Exchange Commission (“SEC”). Accordingly, the accompanying interim financial statements do not include all information required under GAAP for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation of the financial statements, primarily consisting of normal recurring adjustments, have been included. The operating results for the three and nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021 or any other interim period. For further information, refer to the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, as filed with the SEC.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2021
Accounting Changes And Error Corrections [Abstract]
Recent Accounting Pronouncements	2. RECENT ACCOUNTING PRONOUNCEMENTS In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, Leases In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses. The ASU sets forth a “current expected credit loss” (“CECL”) model which requires the Company to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. This replaces the existing probable incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. This ASU requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgements used in determining the allowance for loan losses, as well as the credit quality and underwriting standards of an organization’s loan portfolio. In addition, the ASU amends the accounting for credit losses on available for sale debt securities and purchased financial assets with credit deterioration. In November 2019, FASB issued ASU 2019-10 which extended the effective date for adoption of ASU 2016-13 for smaller reporting companies to fiscal years beginning after December 15, 2022, including interim periods therein. Early adoption is permitted. The Company has formed a working group consisting of accounting, credit and data systems personnel to lead our implementation of this ASU. The working group is evaluating the alternative methodologies which are available and has engaged professional advisors to assist in implementation.

Covid-19 Pandemic Response

Covid-19 Pandemic Response	9 Months Ended
	Sep. 30, 2021
Risks And Uncertainties [Abstract]
Covid-19 Pandemic Response	3. COVID-19 PANDEMIC RESPONSE. The following summarizes the more significant financial repercussions of the COVID-19 pandemic for the Company. Credit Quality and Allowance for Loan Losses The Company increased the allowance for loan losses during 2020 directly related to its estimate, based on available information, of probable incurred losses resulting from the impact of the COVID-19 pandemic. During the first three quarters of 2021, the Company decreased part of the allowance for loan losses, based on available information, due to improving conditions related to the COVID-19 pandemic. As the Company acquires additional information on overall economic prospects together with further assessments of the impact on individual borrowers, the loss estimated will be revised as needed, and these revisions could be material. The Company’s approach to estimating the impact of this pandemic on credit quality is presented in Note 6 – “Loans and Allowance for Loan Losses.” Disaster Response Plan Costs The Company implemented its disaster response plans when the national emergency was declared and a stay-at-home order was issued in the Commonwealth of Massachusetts in March 2020. To operate in this mode the Company incurred expenses for, among other things, compensation for front-line and quarantined employees, buying equipment for a remote workforce, cleaning of office and branch buildings, and communications with customers regarding the status of the Company’s operations. These plan costs were immaterial for first nine months of 2021 and were $229,000 during the first nine months of 2020. Loan Payment Deferral and Paycheck Protection Program In response to the pandemic’s effect on our customers, the Company implemented a series of measures through the date of this report, including participation in the Small Business Administration’s (“SBA”) Paycheck Protection Program (the “PPP”) and granting payment deferrals for residential mortgage, home equity and certain commercial borrowers who were current in their payments. The table below summarizes the lending activity and outstanding balances of PPP loans and the associated pledges to the Board of Governors of the Federal Reserve System’s (“FRB”) Paycheck Protection Program Liquidity Facility (“PPPLF”): PPP Loan Balance FRB Advances PPP Loans Outstanding at Amount Pledged Outstanding at Originated September 30, 2021 to PPPLF September 30, 2021 (1) (In thousands) 2020 PPP loans $ 15,387 $ 35 $ 15,387 $ - 2021 PPP loans 10,967 6,031 - - Total Activity $ 26,354 $ 6,066 $ 15,387 $ - (1) FRB advances were fully repaid during the first quarter of 2021 and the associated PPP loans are no longer pledged. T In accordance with interagency guidance issued in March 2020 and/or the CARES Act enacted in March 2020 and as modified by the Consolidated Appropriations Act, these short-term deferrals are not considered troubled debt restructurings, provided the loan modification is made between March 1, 2020 and as modified by the Consolidated Appropriations Act, the earlier of January 1, 2022 or 60 days after the end of the coronavirus emergency declaration and the applicable loan was not more than 30 days past due as of December 31, 2019. The Company has agreed to loan payment deferrals on commercial loans totaling $37.7 million, residential real estate loans in portfolio totaling $18.9 million and residential real estate loans serviced for others totaling $67.6 million as of September 30, 2021. The commercial loan payment deferrals are concentrated in the hotel and hospitality, restaurant and retail service industries. The qualifying residential real estate and commercial loan borrowers were required to contact the Company to receive loan payment deferrals. The table below summarizes the status of the bank’s loan deferral activity at September 30, 2021: Status of Deferrals Granted Currently Outstanding Paid Off Deferrals Suspended/ Resumed Full Granted (1) Reduced Payment (2) Payment (2) Payoff (3) (In thousands) September 30, 2021 Real estate loans: Residential: One- to four-family $ 15,646 $ 1,727 $ 9,376 $ 4,543 Home equity loans and lines of credit 2,907 43 1,518 1,346 Construction 341 - 341 - Commercial 34,306 - 28,886 5,420 Total real estate loans 53,200 1,770 40,121 11,309 Commercial and industrial 3,436 - 1,426 2,010 Consumer 61 - 61 - Total $ 56,697 $ 1,770 $ 41,608 $ 13,319 December 31, 2020 Real estate loans: Residential: One- to four-family $ 15,514 $ 12,974 $ 2,109 $ 431 Home equity loans and lines of credit 3,179 626 1,287 1,266 Construction 350 350 - - Commercial 34,754 6,544 25,406 2,804 Total real estate loans 53,797 20,494 28,802 4,501 Commercial and industrial 3,645 - 1,635 2,010 Consumer 68 68 - - Total $ 57,510 $ 20,562 $ 30,437 $ 6,511 (1) This column equals the current outstanding balance of loans that received a deferral, plus the balance of loans that were deferred and were paid off in full. (2) These two columns are the current balance of all loans that received a deferral. The Suspended/Reduced Payment column represents loans currently in a deferral period and the Resumed Payment column represents loans that are no longer in a deferral period and have resumed normal payment. (3) This column represents the balance of deferred loans that were paid off in full. The payment deferral programs were applied prospectively from the respective dates of the events and did not change the delinquency status of the loans as of such dates. Accordingly, if all payments were current at the date of the event, the loan will not be reported as past due during the deferral period. Furthermore, for loans subject to the deferral programs on which payments were past due prior to the event, the delinquency status of such loans was frozen to the status that existed at the date of the event until the end of the deferral period. In accordance with the Company’s credit risk management, loans are evaluated as part of an ongoing risk identification process that appropriately applies risk ratings on loans affected by COVID-19. Following a loan modification, the Company reassesses risk ratings for each loan based on a borrower’s current debt level, current financial condition, repayment ability and collateral. Payment deferral programs related to COVID-19 do not automatically result in an adverse risk rating. Accordingly, the table below summarizes the risk rating and for all loans that were granted deferral, and any loans that were listed in nonaccrual status at September 30, 202 1 : Pass Rated / Special Sub- Non- Not Rated (1) Mention (1) standard (1) accrual (1) (2) (In thousands) September 30, 2021 Real estate loans: Residential: One- to four-family $ 10,890 $ 213 $ - $ 213 Home equity loans and lines of credit 1,561 - - - Construction 341 - - - Commercial 17,783 7,560 3,543 - Total real estate loans 30,575 7,773 3,543 213 Commercial and industrial 1,067 359 - - Consumer 61 - - - Total $ 31,703 $ 8,132 $ 3,543 $ 213 December 31, 2020 Real estate loans: Residential: One- to four-family $ 14,887 $ 196 $ - $ 196 Home equity loans and lines of credit 1,913 - - - Construction 350 - - - Commercial 19,020 8,748 4,182 4,182 Total real estate loans 36,170 8,944 4,182 4,378 Commercial and industrial 1,204 431 - - Consumer 68 - - - Total $ 37,442 $ 9,375 $ 4,182 $ 4,378 (1) These three columns indicate the risk rating and subsequent outstanding balance of loans that have received a deferral. The Pass Rated/Not Rated, Special Mention and Substandard columns reconcile to the Suspended Payment/Reduced Payment and Resumed Payment columns in the preceding table. (2) Nonaccrual loans are risk rated as either special mention or substandard and are included as a balance in those columns.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income	4 . ACCUMULATED OTHER COMPREHENSIVE INCOME 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 stockholders’ equity, such items, along with net income, are components of comprehensive income. The components of accumulated other comprehensive income, included in total stockholders’ equity, are as follows: September 30, December 31, 2021 2020 (In thousands) Securities available for sale: Net unrealized gain $ 761 $ 1,713 Tax effect (184 ) (313 ) Net-of-tax amount 577 1,400 Supplemental retirement plan Unrecognized net actuarial loss (676 ) (712 ) Unrecognized net prior service credit 230 254 (446 ) (458 ) Tax effect (47 ) (47 ) Net-of-tax amount (493 ) (505 ) Accumulated other comprehensive income $ 84 $ 895

Securities Available for Sale

Securities Available for Sale	9 Months Ended
	Sep. 30, 2021
Investments Debt And Equity Securities [Abstract]
Securities Available for Sale	5 . SECURITIES AVAILABLE FOR SALE The amortized cost and fair value of securities available for sale, including gross unrealized gains and losses, are as follows: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value (In thousands) September 30, 2021 Debt securities: U.S. Treasury 9,783 — (75 ) 9,708 U.S. Government-sponsored enterprises 1,995 — (3 ) 1,992 Corporate 3,020 43 — 3,063 Municipal 350 1 — 351 Residential mortgage-backed securities: U.S. Government-sponsored enterprises 23,133 463 (142 ) 23,454 Commercial mortgage-backed securities: U.S. Government-sponsored enterprises 8,764 363 — 9,127 U.S. Government-guaranteed 239 2 — 241 Collateralized mortgage obligations: U.S. Government-sponsored enterprises 844 25 — 869 U.S. Government-guaranteed 2,836 84 — 2,920 Total securities available for sale $ 50,964 $ 981 $ (220 ) $ 51,725 December 31, 2020 Debt securities: U.S. Government-sponsored enterprises $ 1,993 $ 3 $ — $ 1,996 Corporate 4,300 56 — 4,356 Municipal 595 5 — 600 Residential mortgage-backed securities: U.S. Government-sponsored enterprises 32,538 919 — 33,457 Commercial mortgage-backed securities: U.S. Government-sponsored enterprises 8,857 525 — 9,382 U.S. Government-guaranteed 977 24 — 1,001 Collateralized mortgage obligations: U.S. Government-sponsored enterprises 996 52 — 1,048 U.S. Government-guaranteed 3,398 128 — 3,526 Total securities available for sale $ 53,654 $ 1,712 $ — $ 55,366 There were no sales of securities during the nine months ended September 30, 2021 and 2020. The amortized cost and fair value of debt securities by contractual maturity at September 30, 2021 are presented below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Fair Cost Value (In thousands) Within 1 year $ 500 $ 502 After 1 year through 5 years 8,926 8,912 After 5 years through 10 years 5,722 5,700 15,148 15,114 Mortgage-backed securities 35,816 36,611 $ 50,964 $ 51,725 Information pertaining to securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows: Less Over Twelve Months Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value September 30, 2021 Debt securities: U.S. Treasury (75 ) 9,708 — — U.S. Government-sponsored enterprises (3 ) 1,992 — — Residential mortgage-backed securities U.S. Government-sponsored enterprises (142 ) 9,072 — — Total $ (220 ) $ 20,772 $ — $ — At September 30, 2021, twelve debt securities had unrealized losses with aggregate depreciation of 1.05% from the Company’s amortized cost basis. The unrealized losses at September 30, 2021 were due to securities price fluctuations related to changes in interest rates and not credit quality, since the time they were purchased. The Company currently does not believe it is probable that it will be unable to collect all amounts due according to the contractual terms of these investments. Therefore, it is expected that the securities would not be settled at a price less than the par value of the investment. Because the Company does not intend to sell any debt securities and it is more likely than not that the Company will not be required to sell any debt securities before recovery of its amortized cost basis, it does not consider these investments to be other-than-temporarily impaired at September 30, 2021.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans and Allowance for Loan Losses	6 . LOANS AND ALLOWANCE FOR LOAN LOSSES A summary of the loan portfolio is as follows: September 30, 2021 December 31, 2020 (In thousands) Real estate loans: Residential: One- to four-family $ 265,561 $ 235,648 Home equity loans and lines of credit 56,124 48,166 Commercial 185,100 143,893 Construction 34,479 31,050 Total real estate loans 541,264 458,757 Commercial and industrial 19,896 20,259 Consumer 8,860 10,289 Total loans 570,020 489,305 Allowance for loan losses (6,432 ) (6,784 ) Net deferred loan costs and fees, and purchase premiums 1,031 1,123 Loans, net $ 564,619 $ 483,644 The following tables present activity in the allowance for loan losses by loan category for the three and nine months ended September 30, 2021 and 2020, and allocation of the allowance to each category as of September 30, 2021 and December 31, 2020: Residential 1-4 Family Second Mortgages and HELOC Commercial Real Estate Construction Commercial and Industrial Consumer Total (In thousands) Three Months Ended September 30, 2021 Allowance at June 30, 2021 $ 1,272 $ 404 $ 3,559 $ 614 $ 569 $ 105 $ 6,523 Provision (credit) for loan losses (50 ) 45 (124 ) 77 (49 ) 11 (90 ) Loans charged-off — — — — — (4 ) (4 ) Recoveries 1 — — — — 2 3 Balance at September 30, 2021 $ 1,223 $ 449 $ 3,435 $ 691 $ 520 $ 114 $ 6,432 Three Months Ended September 30, 2020 Allowance at June 30, 2020 $ 1,553 $ 378 $ 2,766 $ 897 $ 319 $ 146 $ 6,059 Provision for loan losses 30 77 589 (90 ) (75 ) 15 546 Loans charged-off — (3 ) — — — (8 ) (11 ) Recoveries - — — — 2 1 3 Balance at September 30, 2020 $ 1,583 $ 452 $ 3,355 $ 807 $ 246 $ 154 $ 6,597 Nine Months Ended September 30, 2021 Allowance at December 31, 2020 $ 1,646 $ 442 $ 3,402 $ 751 $ 416 $ 127 $ 6,784 Provision (credit) for loan losses (427 ) 7 33 (60 ) 102 15 (330 ) Loans charged-off — — — — — (30 ) (30 ) Recoveries 4 — — — 2 2 8 Balance at September 30, 2021 $ 1,223 $ 449 $ 3,435 $ 691 $ 520 $ 114 $ 6,432 Nine Months Ended September 30, 2020 Allowance at December 31, 2019 $ 1,096 $ 289 $ 1,840 $ 692 $ 235 $ 128 $ 4,280 Provision for loan losses 480 166 1,515 115 9 53 2,338 Loans charged-off — (3 ) — — — (37 ) (40 ) Recoveries 7 — — — 2 10 19 Balance at September 30, 2020 $ 1,583 $ 452 $ 3,355 $ 807 $ 246 $ 154 $ 6,597 Additional information pertaining to the allowance for loan losses at September 30, 2021 and December 31, 2020 is as follows: Residential 1-4 Family Second Mortgages and HELOC Commercial Real Estate Construction Commercial and Industrial Consumer Total September 30, 2021 (In thousands) Allowance for impaired loans $ 122 $ 18 $ — $ — $ — $ — $ 140 Allowance for non-impaired loans 1,101 431 3,435 691 520 114 6,292 Total allowance for loan losses $ 1,223 $ 449 $ 3,435 $ 691 $ 520 $ 114 $ 6,432 Impaired loans $ 2,751 $ 605 $ — $ — $ — $ — $ 3,356 Non-impaired loans 262,810 55,519 185,100 34,479 19,896 8,860 566,664 Total loans $ 265,561 $ 56,124 $ 185,100 $ 34,479 $ 19,896 $ 8,860 $ 570,020 December 31, 2020 Allowance for impaired loans $ 133 $ — $ — $ — $ — $ — $ 133 Allowance for non-impaired loans 1,513 442 3,402 751 416 127 6,651 Total allowance for loan losses $ 1,646 $ 442 $ 3,402 $ 751 $ 416 $ 127 $ 6,784 Impaired loans $ 3,575 $ 623 $ 4,751 $ — $ — $ — $ 8,949 Non-impaired loans 232,073 47,543 139,142 31,050 20,259 10,289 480,356 Total loans $ 235,648 $ 48,166 $ 143,893 $ 31,050 $ 20,259 $ 10,289 $ 489,305 As described in Note 3 – “COVID-19 Pandemic Response” the COVID-19 pandemic has affected the Company’s operations starting in the first quarter of 2020. This pandemic severely disrupted normal economic activity in the communities the Company serves, along with the rest of the nation. It is impossible to know the full extent of the impact of the COVID-19 pandemic and the continued effects it may have on the Company’s operations. Management has determined a separate element of the allowance to represent the estimate of probable incurred losses associated with the impact of the pandemic on the Company’s loan portfolios. This estimate is judgmental and subject to changes as conditions evolve. This qualitative element of the allowance was determined based on the impact the pandemic has had on current employment levels, economic activity in the Company’s geographic regions, and the time it could take for the affected regions to return to a more normalized operating environment. The following is a summary of past due and non-accrual loans at September 30, 2021 and December 31, 2020: 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Non-accrual Loans (In thousands) September 30, 2021 Residential one- to four-family (1) $ 1,467 $ 670 $ — $ 2,137 $ 1,014 Home equity loans and lines of credit (2) 992 — 356 1,348 490 Commercial real estate — — — — — Construction — — — — — Commercial and industrial — — — — — Consumer 62 17 — 79 — Total $ 2,521 $ 687 $ 356 $ 3,564 $ 1,504 December 31, 2020 Residential one- to four-family $ — $ — $ — $ — $ 1,876 Home equity loans and lines of credit 95 — 317 412 584 Commercial real estate — — 26 26 4,713 Construction — — — — — Commercial and industrial — — — — — Consumer 38 64 — 102 — Total $ 133 $ 64 $ 343 $ 540 $ 7,173 (1) Subsequent to September 30, 2021 (2) Subsequent to September 30, 2021, home equity loans and lines of credit with a principal balance totaling $893,000 made payments to become current. The following is a summary of impaired loans at September 30, 2021 and December 31, 2020: Recorded Investment Unpaid Principal Balance Related Allowance (In thousands) September 30, 2021 Impaired loans without a valuation allowance: Residential one- to four-family $ 1,305 $ 1,318 Home equity loans and lines of credit 479 487 Total 1,784 1,805 Impaired loans with a valuation allowance: Residential one- to four-family 1,426 1,433 $ 122 Home equity loans and lines of credit 108 118 18 Total 1,534 1,551 140 Total impaired loans $ 3,318 $ 3,356 $ 140 December 31, 2020 Impaired loans without a valuation allowance: Residential one- to four-family $ 2,160 $ 2,181 Home equity loans and lines of credit 626 623 Commercial real estate 4,753 4,751 Total 7,539 7,555 Impaired loans with a valuation allowance: Residential one- to four-family 1,382 1,394 $ 133 Total 1,382 1,394 133 Total impaired loans $ 8,921 $ 8,949 $ 133 Additional information pertaining to impaired loans follows: Average Interest Cash Basis Recorded Income Interest Investment Recognized Recognized (In thousands) Three Months Ended September 30, 2021 Residential one- to four-family $ 2,718 $ 19 $ 33 Home equity loans and lines of credit 649 2 1 Total $ 3,367 $ 21 $ 34 Three Months Ended September 30, 2020 Residential one- to four-family $ 4,630 $ 144 $ 61 Home equity loans and lines of credit 607 25 — Commercial real estate 7,028 — — Consumer 33 — — Total $ 12,298 $ 169 $ 61 Nine Months Ended September 30, 2021 Residential one- to four-family $ 3,263 $ 54 $ 110 Home equity loans and lines of credit 574 4 2 Commercial real estate 3,321 — — Total $ 7,158 $ 58 $ 112 Nine Months Ended September 30, 2020 Residential one- to four-family $ 4,563 $ 277 $ 131 Home equity loans and lines of credit 559 27 — Commercial real estate 4,713 — — Consumer 15 — — Total $ 9,850 $ 304 $ 131 Troubled Debt Restructurings The Company periodically grants concessions to borrowers experiencing financial difficulties. The Company’s troubled debt restructurings consist primarily of interest rate concessions for periods of three months to thirty years for residential real estate loans, and for periods up to one year for commercial real estate loans. Number of Contracts TDRs Listed as Accrual Number of Contracts TDRs Listed as Non-accrual Total Number of Contracts Total TDRs (In thousands) September 30, 2021 Residential one- to four-family 11 $ 1,716 3 $ 920 14 $ 2,636 Home equity loans and lines of credit 2 99 1 109 3 208 Total 13 $ 1,815 4 $ 1,029 17 $ 2,844 December 31, 2020 Residential one- to four-family $ 12 $ 1,666 $ 4 $ 1,167 16 $ 2,833 Home equity loans and lines of credit 1 42 — — 1 42 Commercial real estate 1 40 — — 1 40 Total 14 1,748 4 $ 1,167 18 $ 2,915 For the nine months ended September 30, 2021, the Company entered into one troubled debt restructuring, for a one- to four-family loan for $57,000. The troubled debt restructuring decreased the interest rate on the loan and extended the maturity. The Company did not enter into any loan modifications meeting the criteria of a troubled debt restructuring for the nine months ended September 30, 2020. Management performs a discounted cash flow calculation to determine the amount of valuation reserve required on each of the troubled debt restructurings. Any reserve required is recorded as part of the allowance for loan losses. During the three and nine months ended September 30, 2021 and 2020, there were no material changes to the allowance for loan losses as a result of loan modifications made which were considered a troubled debt restructuring. No additional funds are committed to be advanced in connection with troubled debt restructurings. During the three and nine months ended September 30, 2021 and 2020, there were no troubled debt restructurings that defaulted (over 30 days past due) within twelve months of the restructure date. At September 30, 2021, there were two residential real estate loans that were modified under a troubled debt restructuring prior to the pandemic that were granted payment deferral plans. One loan, totaling $289,000, was performing in accordance with its modified terms and is currently in repayment, and one loan, for $213,000, was not performing in accordance for more than six months, and is no longer in payment suspension. Credit Quality Information The Company utilizes an eight-grade internal loan rating system for commercial real estate, construction and commercial and industrial loans, as follows: Loans rated 1 – 3B are considered “pass” rated loans with low to average risk. Loans rated 4 are considered “special mention.” These loans are starting to show signs of potential weakness and are being closely monitored by management. Loans rated 5 are considered “substandard” and are 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 6 are considered “doubtful” and 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 7 are considered uncollectible (“loss”) and of such little value that their continuance as loans is not warranted. On an annual basis, or more often if needed, the Company formally reviews the ratings on all commercial real estate, construction and commercial and industrial loans. 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. The following table presents the Company’s loans by risk rating at the dates indicated: Residential 1-4 Family Second Mortgages and HELOC Commercial Real Estate Construction Commercial and Industrial Consumer Total (In thousands) September 30, 2021 Not Rated $ 264,540 $ 55,626 $ — $ — $ — $ 8,860 $ 329,026 Loans rated 1 - 3B (Pass rated) — — 173,806 34,479 19,537 — 227,822 Loans rated 4 365 381 7,751 — 359 — 8,856 Loans rated 5 656 117 3,543 — — — 4,316 $ 265,561 $ 56,124 $ 185,100 $ 34,479 $ 19,896 $ 8,860 $ 570,020 December 31, 2020 Not Rated $ 233,773 $ 47,582 $ — $ — $ — $ 10,289 $ 291,644 Loans rated 1 - 3B (Pass rated) — — 129,925 31,050 19,828 — 180,803 Loans rated 4 803 584 9,257 — 431 — 11,075 Loans rated 5 1,072 — 4,711 — — — 5,783 $ 235,648 $ 48,166 $ 143,893 $ 31,050 $ 20,259 $ 10,289 $ 489,305

Loan Servicing

Loan Servicing	9 Months Ended
	Sep. 30, 2021
Transfers And Servicing [Abstract]
Loan Servicing	7 . LOAN SERVICING Mortgage loans serviced for others are not included in the accompanying unaudited consolidated balance sheets. The unpaid principal balances of residential mortgage loans serviced for others were $1.96 billion and $1.76 billion at September 30, 2021 and December 31, 2020, respectively. The following table summarizes the activity relating to mortgage servicing rights (“MSRs”) for the three and nine months ended For the Three Months Ended For the Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 (In thousands) Mortgage servicing rights: Balance at beginning of period $ 18,014 $ 12,090 $ 15,372 $ 9,484 Additions through originations 788 2,570 5,029 6,131 Amortization (800 ) (807 ) (2,399 ) (1,762 ) Balance at end of period $ 18,002 $ 13,853 $ 18,002 $ 13,853 Valuation allowance: Balance at beginning of period $ 2,639 $ 3,996 $ 2,995 $ 928 Provision (release) (39 ) (1,087 ) (395 ) 1,981 Balance at end of period $ 2,600 $ 2,909 $ 2,600 $ 2,909 Amortized cost, net $ 15,402 $ 10,944 $ 15,402 $ 10,944 Fair value $ 15,927 $ 11,014 $ 15,927 $ 11,014 During the three months ended September 30, 2021 and 2020, the Company released to provision related to the valuation allowance for its MSRs by $39,000 and $1,087,000, respectively. Such adjustments to the valuation allowance were due primarily to changes in fair value caused by the impact of changes in interest rates on expected loan prepayments. During the nine months ended September 30, 2021 the Company decreased the valuation allowance for its MSRs by $395,000 and for the nine months ended September 30, 2020, the Company increased the valuation allowance for its MSRs by $1,981,000. Such adjustments to the valuation allowance were due primarily to changes in fair value caused by the impact of changes in interest rates on expected loan prepayments.

On-Balance Sheet Derivative Ins

On-Balance Sheet Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
On-Balance Sheet Derivative Instruments and Hedging Activities	8. ON-BALANCE SHEET DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Loan Commitments Mortgage loan interest rate lock 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 rates and times in the future, with the intention that these loans will subsequently be sold either in the secondary market, to large aggregators of loans or to other financial institutions. 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 the rate lock to funding of the loan due to an increase 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. The notional amount of derivative loan commitments was $158,085,000 and $396,551,000 at September 30, 2021 and December 31, 2020, respectively. The fair value of such commitments at September 30, 2021 and December 31, 2020 was $2,145,000 and $11,821,000, respectively, and is included in other assets in the consolidated balance sheets. Forward Loan Sale Commitments The Company utilizes both “mandatory delivery” and “best efforts” forward loan sale commitments and To Be Announced (“TBA”) securities to mitigate the risk of potential decreases in the value of loans that would result from the exercise of the derivative loan commitments as well as for loans held for sale. 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 amount 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 and TBA securities will experience changes in fair value that serve to offset the change in fair value of loans held for sale and derivative loan commitments the degree to which depends on the notional amount of such sale commitments. The notional amount of forward loan sale commitments and TBA securities was $160,847,000 and $390,248,000 at September 30, 2021 and December 31, 2020, respectively. The fair value of such commitments consisted of liabilities of $78,000 and $2,180,000 at September 30, 2021 and December 31, 2020, respectively, included in other liabilities in the consolidated balance sheets and assets of $639,000 and $44,000 at September 30, 2021 and December 31, 2020, respectively, included in other assets in the consolidated balance sheets.

Employee Stock Ownership Plan

Employee Stock Ownership Plan	9 Months Ended
	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Employee Stock Ownership Plan	9 . EMPLOYEE STOCK OWNERSHIP PLAN The Company maintains an Employee Stock Ownership Plan (“ESOP”), which is a tax-qualified retirement plan providing eligible employees the opportunity to own Bancorp stock. Bancorp made a loan to the ESOP for the purchase of 469,498 shares of its common stock at $10.00 per share in connection with its initial public offering in July 2016. The loan is payable annually over 25 years with interest at the prime rate to be reset each January 1. The loan is secured by the shares which have not yet been allocated to participants. Loan payments are funded by cash contributions from the Bank. Such contributions are allocated to eligible participants based on their compensation, subject to federal tax limits. Shares are committed to be released on a monthly basis and allocated as of December 31 of each year. The number of shares to be allocated annually is 18,780 through the year 2040. For the three and nine months ended September 30, 2021, the Company recognized compensation expense for the ESOP of $97,000 and $292,000, respectively, compared to $52,000 and $164,000, for the same periods last year, respectively. The fair value of the 361,552 unallocated ESOP shares at September 30, 2021 was $7,802,000.

Share Repurchase Program

Share Repurchase Program	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Share Repurchase Program	1 0 . SHARE REPURCHASE PROGRAM In October 2020, the Company’s Board of Directors adopted a share repurchase program under which the Company may repurchase up to 552,000 shares, or 10%, of its then outstanding common shares. Repurchases under the program may be made in open market or in privately negotiated transactions and pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the SEC. Any repurchased shares will be held by the Company as authorized but unissued shares. As of September 30, 2021, the Company had repurchased 433,633 shares at a cost of $8,797,000 in connection with the program. The share repurchase program expires October 29, 2021. On October 26, 2021, the Company announced a new share repurchase program to purchase up to 510,000 shares of its common stock, representing approximately 10% of the Company’s outstanding common stock. Repurchases under this program may be made in open market transactions. The timing and actual number of shares repurchased will depend on a variety of factors including price, corporate and regulatory requirements, market conditions, and other corporate liquidity requirements and priorities. The repurchase program does not obligate the Company to purchase any particular number of shares. The repurchase program will expire on October 29, 2022 and may be suspended or terminated at any time.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings Per Share	1 1 . EARNINGS PER SHARE Basic earnings per share represents net income divided by the weighted average of common shares outstanding during the period. Diluted earnings per share represents net income divided by the weighted average of common shares and all potentially dilutive common shares outstanding during the period. Unvested restricted shares of common stock having dividend rights are treated as “participating securities” and, accordingly, are considered outstanding in computing basic and diluted earnings per share. Unallocated ESOP shares are not considered to be outstanding for purposes of computing basic or diluted earnings per share. The following table sets forth the calculation of the average number of shares outstanding used to calculate the basic and diluted earnings per share for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Average number of common shares outstanding 5,233,048 5,503,020 5,316,686 5,511,028 Less: Average unallocated ESOP shares (363,893 ) (382,653 ) (368,549 ) (387,323 ) Average number of common shares outstanding used to calculate basic earnings per share 4,869,155 5,120,367 4,948,137 5,123,705 Effect of dilutive stock options 205,521 — 205,411 2,372 Average number of common shares outstanding used to calculate dilutive earnings per share 5,074,676 5,120,367 5,153,548 5,126,077

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	1 2 . STOCK-BASED COMPENSATION Under the Randolph Bancorp, Inc. 2017 Stock Option and Incentive Plan (the “2017 Equity Plan”), the Company may grant options, restricted stock, restricted units or performance awards to its directors, officers and employees. Both incentive stock options and nonqualified stock options may be granted under the 2017 Equity Plan with 586,872 shares initially reserved for options. Any options forfeited because vesting requirements are not met or expired will become available for re-issuance under the 2017 Equity Plan. The exercise price of each option equals the market price of the Company’s stock on the date of the grant and the maximum term of each option is 10 years. The total number of shares initially reserved for restricted stock is 234,749. Options and awards generally vest ratably over three to five years. The fair value of shares awarded is based on the market price at the date of grant. In addition, the Company granted 15,000 shares of restricted stock and 44,118 options in 2020 as an inducement for senior executives to accept employment (the “2020 Inducement Plan”). The inducement awards and options vest ratably over five years. The fair value of shares awarded is based on the market price at the date of grant. At the 2021 Annual Meeting of Shareholders held on May 24, 2021, the Company’s shareholders approved the 2021 Equity Incentive Plan (the “2021 Equity Plan”). The 2021 Equity Plan permits equity awards to employees and directors in the form of stock options, restricted stock and other forms of compensation. The maximum number of shares of common stock that may be issued under the 2021 Equity Plan is 100,000. On August 13, 2021, the Company granted 18,000 performance-based restricted stock unit awards to certain senior level employees. These performance-based restricted stock unit awards were issued from the 2021 Equity Plan and were determined to have a grant date fair value per share of $20.15. The number of stock units to be vested is contingent upon the Company’s attainment of certain performance criteria to be measured at the end of a three-year Stock Options The fair value of each option grant is estimated on the date of the grant using the Black-Scholes option-pricing model with the following assumptions: • Volatility is based on peer group volatility because the Company does not have a sufficient trading history. • Expected life represents the period of time that the option is expected to be outstanding, taking into account the contractual term, and the vesting period. • Expected dividend yield is based on the Company's history and expectation of dividend payouts. • The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant for a period equivalent to the expected life of the option. During the nine months ended September 30, 2021 and 2020, the Company made the following grants of options to purchase shares of common stock and used the following assumptions in measuring the fair value of such grants: 2021 2020 Options granted 40,491 330,118 Vesting period (years) 5 3-5 Expiration period (years) 10 10 Expected volatility 30.98 % 27.65 % Expected life (years) 6.2 6.2 Expected dividend yield — — Risk free interest rate 0.64 % 0.45% - 1.10% Option fair value $6.20 $2.69 - $4.32 A summary of stock option activity for the nine months ended September 30, 2021 is presented in the table below: Options Stock Option Grants Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Balance at January 1, 2021 587,168 $ 13.32 8.40 Granted 40,491 20.06 Exercised (334 ) 15.74 Forfeited (4,500 ) 11.48 Expired — — Balance at September 30, 2021 622,825 $ 13.77 7.76 $ 4,864,981 Exercisable at September 30, 2021 241,118 $ 14.16 7.04 $ 1,789,693 Unrecognized compensation cost (inclusive of directors' options) $ 1,243,252 Weighted average remaining recognition period (years) 2.34 For the nine months ended September 30, 2021 and 2020, stock-based compensation expense applicable to stock options was $442,000 and $545,000, respectively. For the three months ended September 30, 2021 and 2020, stock-based compensation expense applicable to stock options was $156,000 and $138,000, respectively. Included in expense for the nine Restricted Stock Shares issued may be either authorized but unissued shares or reacquired shares held by the Company. Any shares forfeited because vesting requirements are not met will become available for reissuance under the 2017 Equity Plan. The fair market value of shares awarded, based on the market price at the date of grant, is amortized over the applicable vesting period. Restricted stock awarded to date has been at no cost to the awardee. The following table presents the activity in restricted stock awards under the 2017 Equity Plan, the 2020 Inducement Plan and the 2021 Equity Plan for the nine months ended September 30, 2021: Restricted Stock Awards Weighted Average Grant Price Performance-Based Restricted Stock Units (1) Weighted Average Grant Price Restricted Stock Awards and Performance-Based Restricted Stock Units Weighted Average Grant Price Restricted stock awards at January 1, 2021 122,012 $ 12.72 — $ — 122,012 $ 12.72 Granted 19,750 20.15 18,000 20.15 37,750 20.15 Vested (20,463 ) 12.35 — — (20,463 ) 12.35 Forfeited (1,056 ) 11.48 — — (1,056 ) 11.48 Restricted stock awards at September 30, 2021 120,243 $ 14.02 18,000 $ 20.15 138,243 $ 14.81 Unrecognized compensation cost $ 1,315,446 $ 344,509 $ 1,659,955 Weighted average remaining recognition period (years) 2.56 2.54 2.56 (1) Performance restricted stock units granted reflects the estimated number able to be earned under a given award. The maximum number of shares that could vest is 27,000. Estimates are based on the most recent performance assumption available and is adjusted as assumptions change. For the nine September Included in expense for the nine

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	1 3 . FAIR VALUE OF ASSETS AND LIABILITIES Determination of fair value The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various assets and liabilities. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the asset or liability. The following methods and assumptions were used by the Company in estimating fair value disclosures: Securities Loans held for sale Loans The fair values for mortgage loans that are accounted for using a fair value option are estimated based on prevailing market prices and include the servicing value of the loans. Mortgage servicing rights On-balance-sheet derivatives Off-balance sheet credit-related instruments Assets and liabilities recorded at fair value on a recurring basis Assets and liabilities recorded at fair value on a recurring basis are summarized below. Total Level 1 Level 2 Level 3 Fair (In thousands) September 30, 2021 Assets: Securities available for sale $ — $ 51,725 $ — $ 51,725 Portfolio loans (fair value option) — 18,532 — 18,532 Loans held for sale (fair value option) — 75,400 — 75,400 Derivative loan commitments — 2,145 — 2,145 Forward loan sale commitments — 639 — 639 Liabilities: Forward loan sale commitments, including TBAs — 78 — 78 December 31, 2020 Assets: Securities available for sale $ — $ 55,366 $ — $ 55,366 Portfolio loans (fair value option) — 13,780 — 13,780 Loans held for sale (fair value option) — 119,112 — 119,112 Derivative loan commitments — 11,821 — 11,821 Forward loan sale commitments — 44 — 44 Liabilities: Forward loan sale commitments, including TBAs — 2,180 — 2,180 There were no transfers between levels for assets and liabilities recorded at fair value on a recurring basis during the nine months ended September 30, 2021 and 2020. Assets recorded at fair value on a non-recurring basis The Company may also be required, from time to time, to record certain other assets at fair value on a non-recurring basis in accordance with GAAP. These adjustments to fair value usually result from application of lower-of-cost-or-market accounting or write-downs of individual assets. The following table summarizes the fair value hierarchy used to determine each adjustment and the carrying value of the related assets as of September 30, 2021 and December 31, 2020. Period Ended September 30, 2021 September 30, 2021 Level 1 Level 2 Level 3 Total Gains (Losses) (In thousands) Collateral dependent impaired loans $ — $ — $ 1,431 $ — Mortgage servicing rights — 15,402 — 395 $ — $ 15,402 $ 1,431 $ 395 December 31, 2020 Level 1 Level 2 Level 3 (In thousands) Collateral dependent impaired loans $ — $ — $ 6,318 Mortgage servicing rights — 12,377 — Foreclosed real estate — — 132 $ — $ 12,377 $ 6,450 The Company recorded a net decrease in the valuation allowance for its MSRs of $395,000 during the nine months ended September 30, 2021. The Company utilizes an independent valuation from a third party which uses a discounted cash flow model to estimate the fair value of MSRs. The model uses loan prepayment assumptions based on current market conditions and applies a discount rate based on indicated rates of return required by market participants. The decrease in the valuation allowance during the nine months ended September 30, 2021 was caused by slower loan prepayment speeds attributable to the increase in interest rates on residential mortgage loans during the period. L osses applicable to write-downs of impaired loans and foreclosed real estate are based on the appraised value of the underlying collateral less estimated costs to sell. The losses on impaired loans are not recorded directly as an adjustment to current earnings, but rather as a component in determining the allowance for loan losses. The losses on foreclosed real estate represent adjustments in valuation recorded during the time period indicated and not for losses incurred on sales. Appraised values are typically based on a blend of (a) an income approach using observable cash flows to measure fair value, and (b) a market approach using observable market comparisons. These appraised values may be discounted based on management’s historical knowledge, expertise or changes in market conditions from time of valuation. There were no liabilities measured at fair value on a non-recurring basis at September 30, 2021 and December 31, 2020. Summary of fair values of financial instruments The estimated fair values, and related carrying amounts, of the Company’s financial instruments are presented below. Certain financial instruments and all non-financial instruments are exempt from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein do not represent the underlying fair value of the Company. This table excludes financial instruments for which the carrying amount approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, and accrued interest receivable. Financial liabilities for which the fair value approximates carrying value include mortgagors’ escrow accounts and accrued interest payable. September 30, 2021 Carrying Fair Amount Value Level 1 Level 2 Level 3 (In thousands) Financial assets: Securities available for sale 51,725 51,725 — 51,725 — Loans held for sale 75,400 75,400 — 75,400 — Loans, net 564,619 567,688 — — 567,688 Derivative assets 2,784 2,784 — 2,784 — Financial liabilities: Deposits $ 573,405 $ 573,184 $ — $ 573,184 $ — FHLBB advances 62,900 63,319 — 63,319 — Derivative liabilities 78 78 — 78 — December 31, 2020 Carrying Fair Amount Value Level 1 Level 2 Level 3 (In thousands) Financial assets: Securities available for sale 55,366 55,366 — 55,366 — Loans held for sale 119,112 119,112 — 119,112 — Loans, net 483,644 490,914 — — 490,914 Derivative assets 11,865 11,865 — 11,865 — Financial liabilities: Deposits $ 528,307 528,786 $ — $ 528,786 $ — FRB Advances 11,431 11,431 — 11,431 — FHLBB advances 61,895 63,071 — 63,071 — Derivative liabilities 2,180 2,180 — 2,180 —

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	1 4 . COMMITMENTS AND CONTINGENCIES 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. These instruments involve, to varying degrees, elements of market, credit and interest rate risk which are not recognized in the unaudited 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 and conditional obligations as it does for on-balance-sheet instruments. The following financial instruments were outstanding, at the dates indicated, whose contract amounts represent credit risk: September 30, 2021 December 31, 2020 (In thousands) Commitments to originate loans $ 182,656 $ 411,401 Unused lines and letters of credit 82,234 71,458 Unadvanced funds on construction loans 14,449 9,110 Overdraft lines of credit 7,992 7,969 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The commitments for 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 creditworthiness on a case-by-case basis. The majority of these financial instruments are collateralized by real estate. Other contingencies The Company is not currently a party to any pending legal proceedings that it believes would have a material adverse effect on its financial condition, results of operations or cash flows.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment Information	1 5 . SEGMENT INFORMATION The Company reports its activities in one of two business segments, namely Envision Bank (“EB”) and Envision Mortgage (“EM”). Envision Bank operations primarily consist of accepting deposits from customers within the communities surrounding the Bank’s five full-service branch offices and investing those funds in residential and commercial real estate loans, home equity lines of credit, construction loans, commercial and industrial loans, and consumer loans. Envision Mortgage’s operations primarily consist of the origination and sale of residential mortgage loans and the servicing of loans sold to government-sponsored entities. A portion of the loans originated by Envision Mortgage are held in the loan portfolio of Envision Bank. Segment information as of and for the three and nine months ended September 30, 2021 follows: For the Three Months Ended September 30, 2021 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 5,243 $ 733 $ 5,976 Provision (credit) for loan losses (90 ) — (90 ) Net interest income after provision (credit) for loan losses 5,333 733 6,066 Non-interest income: Customer service fees 394 16 410 Gain on loan origination and sale activities, net (1) — 7,925 7,925 Mortgage servicing fees, net (222 ) 496 274 Other 105 131 236 Total non-interest income 277 8,568 8,845 Non-interest expenses: Salaries and employee benefits 1,742 4,639 6,381 Occupancy and equipment 473 241 714 Other non-interest expenses 1,046 1,718 2,764 Total non-interest expenses 3,261 6,598 9,859 Income before income taxes and elimination of inter-segment profit $ 2,349 $ 2,703 5,052 Elimination of inter-segment profit (696 ) Income before income taxes 4,356 Income tax expense 1,230 Net income $ 3,126 Total assets, September 30, 2021 $ 623,447 $ 127,650 $ 751,097 For the Nine Months Ended September 30, 2021 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 13,978 $ 2,288 $ 16,266 Provision (credit) for loan losses (330 ) — (330 ) Net interest income after provision (credit) for loan losses 14,308 2,288 16,596 Non-interest income: Customer service fees 1,125 71 1,196 Gain on loan origination and sale activities, net (1) — 26,157 26,157 Mortgage servicing fees, net (409 ) 1,843 1,434 Other 412 384 796 Total non-interest income 1,128 28,455 29,583 Non-interest expenses: Salaries and employee benefits 5,290 16,838 22,128 Occupancy and equipment 1,325 754 2,079 Other non-interest expenses 3,395 4,835 8,230 Total non-interest expenses 10,010 22,427 32,437 Income before income taxes and elimination of inter-segment profit $ 5,426 $ 8,316 13,742 Elimination of inter-segment profit (2,195 ) Income before income taxes 11,547 Income tax expense 2,732 Net income $ 8,815 (1) Before elimination of inter-segment profit. The information above was derived from the internal management reporting system used by management to measure performance of the segments. The Company’s internal transfer pricing arrangements determined by management primarily consist of the following: 1. EM’s cost of funds is based on the weighted average rate of overnight advances from the Federal Home Loan Bank of Boston (“FHLBB”) for the period. 2. EM is credited with service released premiums and a sales premium totaling 1.50% for new loans transferred to EB’s loans held for investment, and a 1.00% fee for Home Equity Line of Credit (“HELOC”) originations. This income for the three and nine months ended September 30, 2021 totaled $696,000 and $2,195,000, respectively. 3. Loan servicing fees are charged to EB by EM based on the number of residential mortgage loans held in portfolio at a rate of 0.14% per annum during the first six months of 2021. The rate was changed to 0.25% per annum for the three months ended September 30, 2021 and will be used thereafter. These loan servicing fees amounted to $222,000 and $409,000 for the three and nine months ended September 30, 2021 4. Certain cost centers provide services to both business segments. The cost centers include Finance, Marketing, IT and Administration. Costs which are common to both business segments are referred to as “indirect costs” and are allocated using relevant benchmarks, e.g. headcount, number of accounts, etc. Segment information as of and for the three and nine months ended September 30, 2020 follows: For the Three Months Ended September 30, 2020 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 4,032 $ 637 $ 4,669 Provision for loan losses 546 — 546 Net interest income after provision for loan losses 3,486 637 4,123 Non-interest income: Customer service fees 309 21 330 Gain on loan origination and sale activities, net (1) — 18,459 18,459 Mortgage servicing fees, net (98 ) 1,278 1,180 Other 93 169 262 Total non-interest income 304 19,927 20,231 Non-interest expenses: Salaries and employee benefits 1,959 5,952 7,911 Occupancy and equipment 437 422 859 Other non-interest expenses 1,084 1,197 2,281 Total non-interest expenses 3,480 7,571 11,051 Income (loss) before income taxes and elimination of inter-segment profit $ 310 $ 12,993 13,303 Elimination of inter-segment profit (357 ) Income before income taxes 12,946 Income tax expense 2,661 Net income $ 10,285 Total assets, September 30, 2020 $ 573,003 $ 149,965 $ 722,968 For the Nine Months Ended September 30, 2020 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 11,970 $ 1,857 $ 13,827 Provision for loan losses 2,338 — 2,338 Net interest income after provision for loan losses 9,632 1,857 11,489 Non-interest income: Customer service fees 827 75 902 Gain on loan origination and sale activities, net (1) — 40,667 40,667 Mortgage servicing fees, net (281 ) (1,147 ) (1,428 ) Other 318 416 734 Total non-interest income 864 40,011 40,875 Non-interest expenses: Salaries and employee benefits (2) 6,983 17,456 24,439 Occupancy and equipment 1,305 1,090 2,395 Other non-interest expenses 3,286 3,269 6,555 Total non-interest expenses 11,574 21,815 33,389 Income (loss) before income taxes and elimination of inter-segment profit $ (1,078 ) $ 20,053 18,975 Elimination of inter-segment profit (1,051 ) Income before income taxes 17,924 Income tax expense 3,266 Net income $ 14,658 (1) Before elimination of inter-segment profit. (2) Salaries and benefits for the nine months ended September 30, 2020, include the severance and vested stock acceleration costs related to the retirement of the Chief Executive Officer and Chief Financial Officer of the Bank. Total cost of this event was $1.38 million, of which $1.03 million was allocated to the Bank segment and the remainder, $344,000 was allocated to the mortgage segment. The information above was derived from the internal management reporting system used by management to measure performance of the segments. The Company’s internal transfer pricing arrangements determined by management primarily consist of the following: 1. EM’s cost of funds is based on the weighted average rate of overnight advances from the FHLBB for the period. 2. EM is credited with service released premiums and a sales premium totaling 1.50% for new loans transferred to EB’s loans held for investment, and a 1.00% fee for HELOC originations. This income for the three and nine months ended September 30, 2020 totaled $357,000 and $1,051,000, respectively. 3. Loan servicing fees are charged to EB by EM based on the number of residential mortgage loans held in portfolio at a rate of 0.14% per annum and amounted to $98,000 and $281,000 for the three and nine months ended September 30, 2020, respectively. 4. Certain cost centers provide services to both business segments. The cost centers include Finance, Marketing, IT and Administration. Costs which are common to both business segments are referred to as “indirect costs” and are allocated using relevant benchmarks, e.g. headcount, number of accounts, etc.

Mortgage Banking Income

Mortgage Banking Income	9 Months Ended
	Sep. 30, 2021
Mortgage Banking [Abstract]
Mortgage Banking Income	1 6 . MORTGAGE BANKING INCOME The components of gain on loan origination and sale activities and mortgage servicing fees for the three and nine month periods ending September 30, 2021 and 2020 are as follows: For the Three Months Ended For the Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 (In thousands) Gain on loan origination and sale activities, net Gain on sale of mortgage loans and realized gain from derivative financial instruments, net $ 6,339 $ 11,131 $ 28,760 $ 21,296 Net change in fair value of loans held for sale and portfolio loans accounted for at fair value 549 879 (2,176 ) 2,367 Capitalized residential mortgage loan servicing rights 783 2,570 5,056 6,132 Net change in fair value of derivative loan commitments and forward loan sale commitments (442 ) 3,522 (7,678 ) 9,821 Gain on loan origination and sales activities, net $ 7,229 $ 18,102 $ 23,962 $ 39,616 Mortgage servicing fees, net Residential mortgage loan servicing fees $ 1,282 $ 899 $ 3,657 $ 2,315 Amortization of residential mortgage loan servicing rights (795 ) (806 ) (2,366 ) (1,762 ) Release (provision) to the valuation allowance of mortgage loan servicing rights 39 1,087 395 (1,981 ) Sub-servicer expenses (1) (252 ) - (252 ) - Mortgage servicing fees, net $ 274 $ 1,180 $ 1,434 $ (1,428 ) Total gain on loan origination and sales activities and mortgage servicing fees $ 7,503 $ 19,282 $ 25,396 $ 38,188

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Recent Accounting Pronouncements	In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, Leases In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses. The ASU sets forth a “current expected credit loss” (“CECL”) model which requires the Company to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. This replaces the existing probable incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. This ASU requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgements used in determining the allowance for loan losses, as well as the credit quality and underwriting standards of an organization’s loan portfolio. In addition, the ASU amends the accounting for credit losses on available for sale debt securities and purchased financial assets with credit deterioration. In November 2019, FASB issued ASU 2019-10 which extended the effective date for adoption of ASU 2016-13 for smaller reporting companies to fiscal years beginning after December 15, 2022, including interim periods therein. Early adoption is permitted. The Company has formed a working group consisting of accounting, credit and data systems personnel to lead our implementation of this ASU. The working group is evaluating the alternative methodologies which are available and has engaged professional advisors to assist in implementation.

Covid-19 Pandemic Response (Tab

Covid-19 Pandemic Response (Tables)	9 Months Ended
	Sep. 30, 2021
Risks And Uncertainties [Abstract]
Summary of Lending Activity and Outstanding Balances of PPP Loans and The Associated Pledges	The table below summarizes the lending activity and outstanding balances of PPP loans and the associated pledges to the Board of Governors of the Federal Reserve System’s (“FRB”) Paycheck Protection Program Liquidity Facility (“PPPLF”): PPP Loan Balance FRB Advances PPP Loans Outstanding at Amount Pledged Outstanding at Originated September 30, 2021 to PPPLF September 30, 2021 (1) (In thousands) 2020 PPP loans $ 15,387 $ 35 $ 15,387 $ - 2021 PPP loans 10,967 6,031 - - Total Activity $ 26,354 $ 6,066 $ 15,387 $ - (1) FRB advances were fully repaid during the first quarter of 2021 and the associated PPP loans are no longer pledged.
Summary of Loan Portfolio	The table below summarizes the status of the bank’s loan deferral activity at September 30, 2021: Status of Deferrals Granted Currently Outstanding Paid Off Deferrals Suspended/ Resumed Full Granted (1) Reduced Payment (2) Payment (2) Payoff (3) (In thousands) September 30, 2021 Real estate loans: Residential: One- to four-family $ 15,646 $ 1,727 $ 9,376 $ 4,543 Home equity loans and lines of credit 2,907 43 1,518 1,346 Construction 341 - 341 - Commercial 34,306 - 28,886 5,420 Total real estate loans 53,200 1,770 40,121 11,309 Commercial and industrial 3,436 - 1,426 2,010 Consumer 61 - 61 - Total $ 56,697 $ 1,770 $ 41,608 $ 13,319 December 31, 2020 Real estate loans: Residential: One- to four-family $ 15,514 $ 12,974 $ 2,109 $ 431 Home equity loans and lines of credit 3,179 626 1,287 1,266 Construction 350 350 - - Commercial 34,754 6,544 25,406 2,804 Total real estate loans 53,797 20,494 28,802 4,501 Commercial and industrial 3,645 - 1,635 2,010 Consumer 68 68 - - Total $ 57,510 $ 20,562 $ 30,437 $ 6,511 (1) This column equals the current outstanding balance of loans that received a deferral, plus the balance of loans that were deferred and were paid off in full. (2) These two columns are the current balance of all loans that received a deferral. The Suspended/Reduced Payment column represents loans currently in a deferral period and the Resumed Payment column represents loans that are no longer in a deferral period and have resumed normal payment. (3) This column represents the balance of deferred loans that were paid off in full. A summary of the loan portfolio is as follows: September 30, 2021 December 31, 2020 (In thousands) Real estate loans: Residential: One- to four-family $ 265,561 $ 235,648 Home equity loans and lines of credit 56,124 48,166 Commercial 185,100 143,893 Construction 34,479 31,050 Total real estate loans 541,264 458,757 Commercial and industrial 19,896 20,259 Consumer 8,860 10,289 Total loans 570,020 489,305 Allowance for loan losses (6,432 ) (6,784 ) Net deferred loan costs and fees, and purchase premiums 1,031 1,123 Loans, net $ 564,619 $ 483,644
Schedule of Past Due and Non-Accrual Loans by Loan Category	Accordingly, the table below summarizes the risk rating and for all loans that were granted deferral, and any loans that were listed in nonaccrual status at September 30, 202 1 : Pass Rated / Special Sub- Non- Not Rated (1) Mention (1) standard (1) accrual (1) (2) (In thousands) September 30, 2021 Real estate loans: Residential: One- to four-family $ 10,890 $ 213 $ - $ 213 Home equity loans and lines of credit 1,561 - - - Construction 341 - - - Commercial 17,783 7,560 3,543 - Total real estate loans 30,575 7,773 3,543 213 Commercial and industrial 1,067 359 - - Consumer 61 - - - Total $ 31,703 $ 8,132 $ 3,543 $ 213 December 31, 2020 Real estate loans: Residential: One- to four-family $ 14,887 $ 196 $ - $ 196 Home equity loans and lines of credit 1,913 - - - Construction 350 - - - Commercial 19,020 8,748 4,182 4,182 Total real estate loans 36,170 8,944 4,182 4,378 Commercial and industrial 1,204 431 - - Consumer 68 - - - Total $ 37,442 $ 9,375 $ 4,182 $ 4,378 (1) These three columns indicate the risk rating and subsequent outstanding balance of loans that have received a deferral. The Pass Rated/Not Rated, Special Mention and Substandard columns reconcile to the Suspended Payment/Reduced Payment and Resumed Payment columns in the preceding table. (2) Nonaccrual loans are risk rated as either special mention or substandard and are included as a balance in those columns. The following is a summary of past due and non-accrual loans at September 30, 2021 and December 31, 2020: 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Non-accrual Loans (In thousands) September 30, 2021 Residential one- to four-family (1) $ 1,467 $ 670 $ — $ 2,137 $ 1,014 Home equity loans and lines of credit (2) 992 — 356 1,348 490 Commercial real estate — — — — — Construction — — — — — Commercial and industrial — — — — — Consumer 62 17 — 79 — Total $ 2,521 $ 687 $ 356 $ 3,564 $ 1,504 December 31, 2020 Residential one- to four-family $ — $ — $ — $ — $ 1,876 Home equity loans and lines of credit 95 — 317 412 584 Commercial real estate — — 26 26 4,713 Construction — — — — — Commercial and industrial — — — — — Consumer 38 64 — 102 — Total $ 133 $ 64 $ 343 $ 540 $ 7,173 (1) Subsequent to September 30, 2021 (2) Subsequent to September 30, 2021, home equity loans and lines of credit with a principal balance totaling $893,000 made payments to become current.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Components of Accumulated Other Comprehensive Income and Related Tax Effects	The components of accumulated other comprehensive income, included in total stockholders’ equity, are as follows: September 30, December 31, 2021 2020 (In thousands) Securities available for sale: Net unrealized gain $ 761 $ 1,713 Tax effect (184 ) (313 ) Net-of-tax amount 577 1,400 Supplemental retirement plan Unrecognized net actuarial loss (676 ) (712 ) Unrecognized net prior service credit 230 254 (446 ) (458 ) Tax effect (47 ) (47 ) Net-of-tax amount (493 ) (505 ) Accumulated other comprehensive income $ 84 $ 895

Securities Available for Sale (

Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2021
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Value of Securities	The amortized cost and fair value of securities available for sale, including gross unrealized gains and losses, are as follows: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value (In thousands) September 30, 2021 Debt securities: U.S. Treasury 9,783 — (75 ) 9,708 U.S. Government-sponsored enterprises 1,995 — (3 ) 1,992 Corporate 3,020 43 — 3,063 Municipal 350 1 — 351 Residential mortgage-backed securities: U.S. Government-sponsored enterprises 23,133 463 (142 ) 23,454 Commercial mortgage-backed securities: U.S. Government-sponsored enterprises 8,764 363 — 9,127 U.S. Government-guaranteed 239 2 — 241 Collateralized mortgage obligations: U.S. Government-sponsored enterprises 844 25 — 869 U.S. Government-guaranteed 2,836 84 — 2,920 Total securities available for sale $ 50,964 $ 981 $ (220 ) $ 51,725 December 31, 2020 Debt securities: U.S. Government-sponsored enterprises $ 1,993 $ 3 $ — $ 1,996 Corporate 4,300 56 — 4,356 Municipal 595 5 — 600 Residential mortgage-backed securities: U.S. Government-sponsored enterprises 32,538 919 — 33,457 Commercial mortgage-backed securities: U.S. Government-sponsored enterprises 8,857 525 — 9,382 U.S. Government-guaranteed 977 24 — 1,001 Collateralized mortgage obligations: U.S. Government-sponsored enterprises 996 52 — 1,048 U.S. Government-guaranteed 3,398 128 — 3,526 Total securities available for sale $ 53,654 $ 1,712 $ — $ 55,366
Investments Classified by Contractual Maturity Date	The amortized cost and fair value of debt securities by contractual maturity at September 30, 2021 are presented below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Fair Cost Value (In thousands) Within 1 year $ 500 $ 502 After 1 year through 5 years 8,926 8,912 After 5 years through 10 years 5,722 5,700 15,148 15,114 Mortgage-backed securities 35,816 36,611 $ 50,964 $ 51,725
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	Information pertaining to securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows: Less Over Twelve Months Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value September 30, 2021 Debt securities: U.S. Treasury (75 ) 9,708 — — U.S. Government-sponsored enterprises (3 ) 1,992 — — Residential mortgage-backed securities U.S. Government-sponsored enterprises (142 ) 9,072 — — Total $ (220 ) $ 20,772 $ — $ —

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Summary of Loan Portfolio	The table below summarizes the status of the bank’s loan deferral activity at September 30, 2021: Status of Deferrals Granted Currently Outstanding Paid Off Deferrals Suspended/ Resumed Full Granted (1) Reduced Payment (2) Payment (2) Payoff (3) (In thousands) September 30, 2021 Real estate loans: Residential: One- to four-family $ 15,646 $ 1,727 $ 9,376 $ 4,543 Home equity loans and lines of credit 2,907 43 1,518 1,346 Construction 341 - 341 - Commercial 34,306 - 28,886 5,420 Total real estate loans 53,200 1,770 40,121 11,309 Commercial and industrial 3,436 - 1,426 2,010 Consumer 61 - 61 - Total $ 56,697 $ 1,770 $ 41,608 $ 13,319 December 31, 2020 Real estate loans: Residential: One- to four-family $ 15,514 $ 12,974 $ 2,109 $ 431 Home equity loans and lines of credit 3,179 626 1,287 1,266 Construction 350 350 - - Commercial 34,754 6,544 25,406 2,804 Total real estate loans 53,797 20,494 28,802 4,501 Commercial and industrial 3,645 - 1,635 2,010 Consumer 68 68 - - Total $ 57,510 $ 20,562 $ 30,437 $ 6,511 (1) This column equals the current outstanding balance of loans that received a deferral, plus the balance of loans that were deferred and were paid off in full. (2) These two columns are the current balance of all loans that received a deferral. The Suspended/Reduced Payment column represents loans currently in a deferral period and the Resumed Payment column represents loans that are no longer in a deferral period and have resumed normal payment. (3) This column represents the balance of deferred loans that were paid off in full. A summary of the loan portfolio is as follows: September 30, 2021 December 31, 2020 (In thousands) Real estate loans: Residential: One- to four-family $ 265,561 $ 235,648 Home equity loans and lines of credit 56,124 48,166 Commercial 185,100 143,893 Construction 34,479 31,050 Total real estate loans 541,264 458,757 Commercial and industrial 19,896 20,259 Consumer 8,860 10,289 Total loans 570,020 489,305 Allowance for loan losses (6,432 ) (6,784 ) Net deferred loan costs and fees, and purchase premiums 1,031 1,123 Loans, net $ 564,619 $ 483,644
Summary of Activity in the Allowance for Loan Losses by Loan Category	The following tables present activity in the allowance for loan losses by loan category for the three and nine months ended September 30, 2021 and 2020, and allocation of the allowance to each category as of September 30, 2021 and December 31, 2020: Residential 1-4 Family Second Mortgages and HELOC Commercial Real Estate Construction Commercial and Industrial Consumer Total (In thousands) Three Months Ended September 30, 2021 Allowance at June 30, 2021 $ 1,272 $ 404 $ 3,559 $ 614 $ 569 $ 105 $ 6,523 Provision (credit) for loan losses (50 ) 45 (124 ) 77 (49 ) 11 (90 ) Loans charged-off — — — — — (4 ) (4 ) Recoveries 1 — — — — 2 3 Balance at September 30, 2021 $ 1,223 $ 449 $ 3,435 $ 691 $ 520 $ 114 $ 6,432 Three Months Ended September 30, 2020 Allowance at June 30, 2020 $ 1,553 $ 378 $ 2,766 $ 897 $ 319 $ 146 $ 6,059 Provision for loan losses 30 77 589 (90 ) (75 ) 15 546 Loans charged-off — (3 ) — — — (8 ) (11 ) Recoveries - — — — 2 1 3 Balance at September 30, 2020 $ 1,583 $ 452 $ 3,355 $ 807 $ 246 $ 154 $ 6,597 Nine Months Ended September 30, 2021 Allowance at December 31, 2020 $ 1,646 $ 442 $ 3,402 $ 751 $ 416 $ 127 $ 6,784 Provision (credit) for loan losses (427 ) 7 33 (60 ) 102 15 (330 ) Loans charged-off — — — — — (30 ) (30 ) Recoveries 4 — — — 2 2 8 Balance at September 30, 2021 $ 1,223 $ 449 $ 3,435 $ 691 $ 520 $ 114 $ 6,432 Nine Months Ended September 30, 2020 Allowance at December 31, 2019 $ 1,096 $ 289 $ 1,840 $ 692 $ 235 $ 128 $ 4,280 Provision for loan losses 480 166 1,515 115 9 53 2,338 Loans charged-off — (3 ) — — — (37 ) (40 ) Recoveries 7 — — — 2 10 19 Balance at September 30, 2020 $ 1,583 $ 452 $ 3,355 $ 807 $ 246 $ 154 $ 6,597
Summary of Additional Information Pertaining to the Allowance for Loan Losses	Additional information pertaining to the allowance for loan losses at September 30, 2021 and December 31, 2020 is as follows: Residential 1-4 Family Second Mortgages and HELOC Commercial Real Estate Construction Commercial and Industrial Consumer Total September 30, 2021 (In thousands) Allowance for impaired loans $ 122 $ 18 $ — $ — $ — $ — $ 140 Allowance for non-impaired loans 1,101 431 3,435 691 520 114 6,292 Total allowance for loan losses $ 1,223 $ 449 $ 3,435 $ 691 $ 520 $ 114 $ 6,432 Impaired loans $ 2,751 $ 605 $ — $ — $ — $ — $ 3,356 Non-impaired loans 262,810 55,519 185,100 34,479 19,896 8,860 566,664 Total loans $ 265,561 $ 56,124 $ 185,100 $ 34,479 $ 19,896 $ 8,860 $ 570,020 December 31, 2020 Allowance for impaired loans $ 133 $ — $ — $ — $ — $ — $ 133 Allowance for non-impaired loans 1,513 442 3,402 751 416 127 6,651 Total allowance for loan losses $ 1,646 $ 442 $ 3,402 $ 751 $ 416 $ 127 $ 6,784 Impaired loans $ 3,575 $ 623 $ 4,751 $ — $ — $ — $ 8,949 Non-impaired loans 232,073 47,543 139,142 31,050 20,259 10,289 480,356 Total loans $ 235,648 $ 48,166 $ 143,893 $ 31,050 $ 20,259 $ 10,289 $ 489,305
Schedule of Past Due and Non-Accrual Loans by Loan Category	Accordingly, the table below summarizes the risk rating and for all loans that were granted deferral, and any loans that were listed in nonaccrual status at September 30, 202 1 : Pass Rated / Special Sub- Non- Not Rated (1) Mention (1) standard (1) accrual (1) (2) (In thousands) September 30, 2021 Real estate loans: Residential: One- to four-family $ 10,890 $ 213 $ - $ 213 Home equity loans and lines of credit 1,561 - - - Construction 341 - - - Commercial 17,783 7,560 3,543 - Total real estate loans 30,575 7,773 3,543 213 Commercial and industrial 1,067 359 - - Consumer 61 - - - Total $ 31,703 $ 8,132 $ 3,543 $ 213 December 31, 2020 Real estate loans: Residential: One- to four-family $ 14,887 $ 196 $ - $ 196 Home equity loans and lines of credit 1,913 - - - Construction 350 - - - Commercial 19,020 8,748 4,182 4,182 Total real estate loans 36,170 8,944 4,182 4,378 Commercial and industrial 1,204 431 - - Consumer 68 - - - Total $ 37,442 $ 9,375 $ 4,182 $ 4,378 (1) These three columns indicate the risk rating and subsequent outstanding balance of loans that have received a deferral. The Pass Rated/Not Rated, Special Mention and Substandard columns reconcile to the Suspended Payment/Reduced Payment and Resumed Payment columns in the preceding table. (2) Nonaccrual loans are risk rated as either special mention or substandard and are included as a balance in those columns. The following is a summary of past due and non-accrual loans at September 30, 2021 and December 31, 2020: 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Non-accrual Loans (In thousands) September 30, 2021 Residential one- to four-family (1) $ 1,467 $ 670 $ — $ 2,137 $ 1,014 Home equity loans and lines of credit (2) 992 — 356 1,348 490 Commercial real estate — — — — — Construction — — — — — Commercial and industrial — — — — — Consumer 62 17 — 79 — Total $ 2,521 $ 687 $ 356 $ 3,564 $ 1,504 December 31, 2020 Residential one- to four-family $ — $ — $ — $ — $ 1,876 Home equity loans and lines of credit 95 — 317 412 584 Commercial real estate — — 26 26 4,713 Construction — — — — — Commercial and industrial — — — — — Consumer 38 64 — 102 — Total $ 133 $ 64 $ 343 $ 540 $ 7,173 (1) Subsequent to September 30, 2021 (2) Subsequent to September 30, 2021, home equity loans and lines of credit with a principal balance totaling $893,000 made payments to become current.
Summary of Impaired Loans and Additional Information Pertaining to Impaired Loans	The following is a summary of impaired loans at September 30, 2021 and December 31, 2020: Recorded Investment Unpaid Principal Balance Related Allowance (In thousands) September 30, 2021 Impaired loans without a valuation allowance: Residential one- to four-family $ 1,305 $ 1,318 Home equity loans and lines of credit 479 487 Total 1,784 1,805 Impaired loans with a valuation allowance: Residential one- to four-family 1,426 1,433 $ 122 Home equity loans and lines of credit 108 118 18 Total 1,534 1,551 140 Total impaired loans $ 3,318 $ 3,356 $ 140 December 31, 2020 Impaired loans without a valuation allowance: Residential one- to four-family $ 2,160 $ 2,181 Home equity loans and lines of credit 626 623 Commercial real estate 4,753 4,751 Total 7,539 7,555 Impaired loans with a valuation allowance: Residential one- to four-family 1,382 1,394 $ 133 Total 1,382 1,394 133 Total impaired loans $ 8,921 $ 8,949 $ 133 Additional information pertaining to impaired loans follows: Average Interest Cash Basis Recorded Income Interest Investment Recognized Recognized (In thousands) Three Months Ended September 30, 2021 Residential one- to four-family $ 2,718 $ 19 $ 33 Home equity loans and lines of credit 649 2 1 Total $ 3,367 $ 21 $ 34 Three Months Ended September 30, 2020 Residential one- to four-family $ 4,630 $ 144 $ 61 Home equity loans and lines of credit 607 25 — Commercial real estate 7,028 — — Consumer 33 — — Total $ 12,298 $ 169 $ 61 Nine Months Ended September 30, 2021 Residential one- to four-family $ 3,263 $ 54 $ 110 Home equity loans and lines of credit 574 4 2 Commercial real estate 3,321 — — Total $ 7,158 $ 58 $ 112 Nine Months Ended September 30, 2020 Residential one- to four-family $ 4,563 $ 277 $ 131 Home equity loans and lines of credit 559 27 — Commercial real estate 4,713 — — Consumer 15 — — Total $ 9,850 $ 304 $ 131
Summary of Financing Receivable, Troubled Debt Restructuring	The Company’s troubled debt restructurings consist primarily of interest rate concessions for periods of three months to thirty years for residential real estate loans, and for periods up to one year for commercial real estate loans. Number of Contracts TDRs Listed as Accrual Number of Contracts TDRs Listed as Non-accrual Total Number of Contracts Total TDRs (In thousands) September 30, 2021 Residential one- to four-family 11 $ 1,716 3 $ 920 14 $ 2,636 Home equity loans and lines of credit 2 99 1 109 3 208 Total 13 $ 1,815 4 $ 1,029 17 $ 2,844 December 31, 2020 Residential one- to four-family $ 12 $ 1,666 $ 4 $ 1,167 16 $ 2,833 Home equity loans and lines of credit 1 42 — — 1 42 Commercial real estate 1 40 — — 1 40 Total 14 1,748 4 $ 1,167 18 $ 2,915
Summary of Company's Loans by Risk Rating	The following table presents the Company’s loans by risk rating at the dates indicated: Residential 1-4 Family Second Mortgages and HELOC Commercial Real Estate Construction Commercial and Industrial Consumer Total (In thousands) September 30, 2021 Not Rated $ 264,540 $ 55,626 $ — $ — $ — $ 8,860 $ 329,026 Loans rated 1 - 3B (Pass rated) — — 173,806 34,479 19,537 — 227,822 Loans rated 4 365 381 7,751 — 359 — 8,856 Loans rated 5 656 117 3,543 — — — 4,316 $ 265,561 $ 56,124 $ 185,100 $ 34,479 $ 19,896 $ 8,860 $ 570,020 December 31, 2020 Not Rated $ 233,773 $ 47,582 $ — $ — $ — $ 10,289 $ 291,644 Loans rated 1 - 3B (Pass rated) — — 129,925 31,050 19,828 — 180,803 Loans rated 4 803 584 9,257 — 431 — 11,075 Loans rated 5 1,072 — 4,711 — — — 5,783 $ 235,648 $ 48,166 $ 143,893 $ 31,050 $ 20,259 $ 10,289 $ 489,305

Loan Servicing (Tables)

Loan Servicing (Tables)	9 Months Ended
	Sep. 30, 2021
Transfers And Servicing [Abstract]
Summary of Activity Relating to Mortgage Servicing Rights	The following table summarizes the activity relating to mortgage servicing rights (“MSRs”) for the three and nine months ended For the Three Months Ended For the Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 (In thousands) Mortgage servicing rights: Balance at beginning of period $ 18,014 $ 12,090 $ 15,372 $ 9,484 Additions through originations 788 2,570 5,029 6,131 Amortization (800 ) (807 ) (2,399 ) (1,762 ) Balance at end of period $ 18,002 $ 13,853 $ 18,002 $ 13,853 Valuation allowance: Balance at beginning of period $ 2,639 $ 3,996 $ 2,995 $ 928 Provision (release) (39 ) (1,087 ) (395 ) 1,981 Balance at end of period $ 2,600 $ 2,909 $ 2,600 $ 2,909 Amortized cost, net $ 15,402 $ 10,944 $ 15,402 $ 10,944 Fair value $ 15,927 $ 11,014 $ 15,927 $ 11,014

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Calculation of Average Number of Shares Outstanding Used to Calculate Basic and Diluted Earnings (Loss) Per Share	The following table sets forth the calculation of the average number of shares outstanding used to calculate the basic and diluted earnings per share for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Average number of common shares outstanding 5,233,048 5,503,020 5,316,686 5,511,028 Less: Average unallocated ESOP shares (363,893 ) (382,653 ) (368,549 ) (387,323 ) Average number of common shares outstanding used to calculate basic earnings per share 4,869,155 5,120,367 4,948,137 5,123,705 Effect of dilutive stock options 205,521 — 205,411 2,372 Average number of common shares outstanding used to calculate dilutive earnings per share 5,074,676 5,120,367 5,153,548 5,126,077

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Grants of Options to Purchase Shares of Common Stock	During the nine months ended September 30, 2021 and 2020, the Company made the following grants of options to purchase shares of common stock and used the following assumptions in measuring the fair value of such grants: 2021 2020 Options granted 40,491 330,118 Vesting period (years) 5 3-5 Expiration period (years) 10 10 Expected volatility 30.98 % 27.65 % Expected life (years) 6.2 6.2 Expected dividend yield — — Risk free interest rate 0.64 % 0.45% - 1.10% Option fair value $6.20 $2.69 - $4.32
Summary of Stock Options Activity	A summary of stock option activity for the nine months ended September 30, 2021 is presented in the table below: Options Stock Option Grants Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Balance at January 1, 2021 587,168 $ 13.32 8.40 Granted 40,491 20.06 Exercised (334 ) 15.74 Forfeited (4,500 ) 11.48 Expired — — Balance at September 30, 2021 622,825 $ 13.77 7.76 $ 4,864,981 Exercisable at September 30, 2021 241,118 $ 14.16 7.04 $ 1,789,693 Unrecognized compensation cost (inclusive of directors' options) $ 1,243,252 Weighted average remaining recognition period (years) 2.34
Summary of Activity in Restricted Stock Awards Under Equity Plan	The following table presents the activity in restricted stock awards under the 2017 Equity Plan, the 2020 Inducement Plan and the 2021 Equity Plan for the nine months ended September 30, 2021: Restricted Stock Awards Weighted Average Grant Price Performance-Based Restricted Stock Units (1) Weighted Average Grant Price Restricted Stock Awards and Performance-Based Restricted Stock Units Weighted Average Grant Price Restricted stock awards at January 1, 2021 122,012 $ 12.72 — $ — 122,012 $ 12.72 Granted 19,750 20.15 18,000 20.15 37,750 20.15 Vested (20,463 ) 12.35 — — (20,463 ) 12.35 Forfeited (1,056 ) 11.48 — — (1,056 ) 11.48 Restricted stock awards at September 30, 2021 120,243 $ 14.02 18,000 $ 20.15 138,243 $ 14.81 Unrecognized compensation cost $ 1,315,446 $ 344,509 $ 1,659,955 Weighted average remaining recognition period (years) 2.56 2.54 2.56 (1) Performance restricted stock units granted reflects the estimated number able to be earned under a given award. The maximum number of shares that could vest is 27,000. Estimates are based on the most recent performance assumption available and is adjusted as assumptions change.

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Recorded at Fair Value on a Recurring Basis	Assets and liabilities recorded at fair value on a recurring basis are summarized below. Total Level 1 Level 2 Level 3 Fair (In thousands) September 30, 2021 Assets: Securities available for sale $ — $ 51,725 $ — $ 51,725 Portfolio loans (fair value option) — 18,532 — 18,532 Loans held for sale (fair value option) — 75,400 — 75,400 Derivative loan commitments — 2,145 — 2,145 Forward loan sale commitments — 639 — 639 Liabilities: Forward loan sale commitments, including TBAs — 78 — 78 December 31, 2020 Assets: Securities available for sale $ — $ 55,366 $ — $ 55,366 Portfolio loans (fair value option) — 13,780 — 13,780 Loans held for sale (fair value option) — 119,112 — 119,112 Derivative loan commitments — 11,821 — 11,821 Forward loan sale commitments — 44 — 44 Liabilities: Forward loan sale commitments, including TBAs — 2,180 — 2,180
Schedule of Assets Recorded at Fair Value on a Non-Recurring Basis	The following table summarizes the fair value hierarchy used to determine each adjustment and the carrying value of the related assets as of September 30, 2021 and December 31, 2020. Period Ended September 30, 2021 September 30, 2021 Level 1 Level 2 Level 3 Total Gains (Losses) (In thousands) Collateral dependent impaired loans $ — $ — $ 1,431 $ — Mortgage servicing rights — 15,402 — 395 $ — $ 15,402 $ 1,431 $ 395 December 31, 2020 Level 1 Level 2 Level 3 (In thousands) Collateral dependent impaired loans $ — $ — $ 6,318 Mortgage servicing rights — 12,377 — Foreclosed real estate — — 132 $ — $ 12,377 $ 6,450
Summary of Carrying Values, Estimated Fair Values and Placement in Fair Value Hierarchy of Company's Financial Instruments	The estimated fair values, and related carrying amounts, of the Company’s financial instruments are presented below. Certain financial instruments and all non-financial instruments are exempt from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein do not represent the underlying fair value of the Company. This table excludes financial instruments for which the carrying amount approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, and accrued interest receivable. Financial liabilities for which the fair value approximates carrying value include mortgagors’ escrow accounts and accrued interest payable. September 30, 2021 Carrying Fair Amount Value Level 1 Level 2 Level 3 (In thousands) Financial assets: Securities available for sale 51,725 51,725 — 51,725 — Loans held for sale 75,400 75,400 — 75,400 — Loans, net 564,619 567,688 — — 567,688 Derivative assets 2,784 2,784 — 2,784 — Financial liabilities: Deposits $ 573,405 $ 573,184 $ — $ 573,184 $ — FHLBB advances 62,900 63,319 — 63,319 — Derivative liabilities 78 78 — 78 — December 31, 2020 Carrying Fair Amount Value Level 1 Level 2 Level 3 (In thousands) Financial assets: Securities available for sale 55,366 55,366 — 55,366 — Loans held for sale 119,112 119,112 — 119,112 — Loans, net 483,644 490,914 — — 490,914 Derivative assets 11,865 11,865 — 11,865 — Financial liabilities: Deposits $ 528,307 528,786 $ — $ 528,786 $ — FRB Advances 11,431 11,431 — 11,431 — FHLBB advances 61,895 63,071 — 63,071 — Derivative liabilities 2,180 2,180 — 2,180 —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Summary of Financial Instruments Outstanding Contract Amounts Represent Credit Risk	The following financial instruments were outstanding, at the dates indicated, whose contract amounts represent credit risk: September 30, 2021 December 31, 2020 (In thousands) Commitments to originate loans $ 182,656 $ 411,401 Unused lines and letters of credit 82,234 71,458 Unadvanced funds on construction loans 14,449 9,110 Overdraft lines of credit 7,992 7,969

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Summary of Segment Information	Segment information as of and for the three and nine months ended September 30, 2021 follows: For the Three Months Ended September 30, 2021 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 5,243 $ 733 $ 5,976 Provision (credit) for loan losses (90 ) — (90 ) Net interest income after provision (credit) for loan losses 5,333 733 6,066 Non-interest income: Customer service fees 394 16 410 Gain on loan origination and sale activities, net (1) — 7,925 7,925 Mortgage servicing fees, net (222 ) 496 274 Other 105 131 236 Total non-interest income 277 8,568 8,845 Non-interest expenses: Salaries and employee benefits 1,742 4,639 6,381 Occupancy and equipment 473 241 714 Other non-interest expenses 1,046 1,718 2,764 Total non-interest expenses 3,261 6,598 9,859 Income before income taxes and elimination of inter-segment profit $ 2,349 $ 2,703 5,052 Elimination of inter-segment profit (696 ) Income before income taxes 4,356 Income tax expense 1,230 Net income $ 3,126 Total assets, September 30, 2021 $ 623,447 $ 127,650 $ 751,097 For the Nine Months Ended September 30, 2021 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 13,978 $ 2,288 $ 16,266 Provision (credit) for loan losses (330 ) — (330 ) Net interest income after provision (credit) for loan losses 14,308 2,288 16,596 Non-interest income: Customer service fees 1,125 71 1,196 Gain on loan origination and sale activities, net (1) — 26,157 26,157 Mortgage servicing fees, net (409 ) 1,843 1,434 Other 412 384 796 Total non-interest income 1,128 28,455 29,583 Non-interest expenses: Salaries and employee benefits 5,290 16,838 22,128 Occupancy and equipment 1,325 754 2,079 Other non-interest expenses 3,395 4,835 8,230 Total non-interest expenses 10,010 22,427 32,437 Income before income taxes and elimination of inter-segment profit $ 5,426 $ 8,316 13,742 Elimination of inter-segment profit (2,195 ) Income before income taxes 11,547 Income tax expense 2,732 Net income $ 8,815 (1) Before elimination of inter-segment profit. Segment information as of and for the three and nine months ended September 30, 2020 follows: For the Three Months Ended September 30, 2020 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 4,032 $ 637 $ 4,669 Provision for loan losses 546 — 546 Net interest income after provision for loan losses 3,486 637 4,123 Non-interest income: Customer service fees 309 21 330 Gain on loan origination and sale activities, net (1) — 18,459 18,459 Mortgage servicing fees, net (98 ) 1,278 1,180 Other 93 169 262 Total non-interest income 304 19,927 20,231 Non-interest expenses: Salaries and employee benefits 1,959 5,952 7,911 Occupancy and equipment 437 422 859 Other non-interest expenses 1,084 1,197 2,281 Total non-interest expenses 3,480 7,571 11,051 Income (loss) before income taxes and elimination of inter-segment profit $ 310 $ 12,993 13,303 Elimination of inter-segment profit (357 ) Income before income taxes 12,946 Income tax expense 2,661 Net income $ 10,285 Total assets, September 30, 2020 $ 573,003 $ 149,965 $ 722,968 For the Nine Months Ended September 30, 2020 Envision Bank Envision Mortgage Consolidated Total (in thousands) Net interest income $ 11,970 $ 1,857 $ 13,827 Provision for loan losses 2,338 — 2,338 Net interest income after provision for loan losses 9,632 1,857 11,489 Non-interest income: Customer service fees 827 75 902 Gain on loan origination and sale activities, net (1) — 40,667 40,667 Mortgage servicing fees, net (281 ) (1,147 ) (1,428 ) Other 318 416 734 Total non-interest income 864 40,011 40,875 Non-interest expenses: Salaries and employee benefits (2) 6,983 17,456 24,439 Occupancy and equipment 1,305 1,090 2,395 Other non-interest expenses 3,286 3,269 6,555 Total non-interest expenses 11,574 21,815 33,389 Income (loss) before income taxes and elimination of inter-segment profit $ (1,078 ) $ 20,053 18,975 Elimination of inter-segment profit (1,051 ) Income before income taxes 17,924 Income tax expense 3,266 Net income $ 14,658 (1) Before elimination of inter-segment profit. (2) Salaries and benefits for the nine months ended September 30, 2020, include the severance and vested stock acceleration costs related to the retirement of the Chief Executive Officer and Chief Financial Officer of the Bank. Total cost of this event was $1.38 million, of which $1.03 million was allocated to the Bank segment and the remainder, $344,000 was allocated to the mortgage segment.

Mortgage Banking Income (Tables

Mortgage Banking Income (Tables)	9 Months Ended
	Sep. 30, 2021
Mortgage Banking [Abstract]
Components of Gain on Loan Origination and Sale Activities and Mortgage Servicing Fees	The components of gain on loan origination and sale activities and mortgage servicing fees for the three and nine month periods ending September 30, 2021 and 2020 are as follows: For the Three Months Ended For the Nine Months Ended September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 (In thousands) Gain on loan origination and sale activities, net Gain on sale of mortgage loans and realized gain from derivative financial instruments, net $ 6,339 $ 11,131 $ 28,760 $ 21,296 Net change in fair value of loans held for sale and portfolio loans accounted for at fair value 549 879 (2,176 ) 2,367 Capitalized residential mortgage loan servicing rights 783 2,570 5,056 6,132 Net change in fair value of derivative loan commitments and forward loan sale commitments (442 ) 3,522 (7,678 ) 9,821 Gain on loan origination and sales activities, net $ 7,229 $ 18,102 $ 23,962 $ 39,616 Mortgage servicing fees, net Residential mortgage loan servicing fees $ 1,282 $ 899 $ 3,657 $ 2,315 Amortization of residential mortgage loan servicing rights (795 ) (806 ) (2,366 ) (1,762 ) Release (provision) to the valuation allowance of mortgage loan servicing rights 39 1,087 395 (1,981 ) Sub-servicer expenses (1) (252 ) - (252 ) - Mortgage servicing fees, net $ 274 $ 1,180 $ 1,434 $ (1,428 ) Total gain on loan origination and sales activities and mortgage servicing fees $ 7,503 $ 19,282 $ 25,396 $ 38,188

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Right-of-use assets related to operating leases		$ 1,100
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Other assets
Liabilities	$ 650,500		$ 621,253
Other Liabilities [Member]
Liabilities		$ 1,100

Covid-19 Pandemic Response - Ad

Covid-19 Pandemic Response - Additional Information (Detail) - Payment Deferral [Member] - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2021
Unusual Risk Or Uncertainty [Line Items]
Disaster Response Plan Costs	$ 229,000
Residential Real Estate Loan Serviced for Others [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan, amount		$ 67,600,000
Residential Real Estate Loans in Portfolio [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan, amount		18,900,000
Commercial Loan [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan, amount		$ 37,700,000

Covid-19 Pandemic Response - Su

Covid-19 Pandemic Response - Summary of Lending Activity and Outstanding Balances of PPP Loans and The Associated Pledges (Detail) $ in Thousands	Sep. 30, 2021USD ($)
Financing Receivable Recorded Investment Past Due [Line Items]
PPP Loans Originated	$ 26,354
PPP Loan Balance Outstanding	6,066
Amount Pledged To PPLF	15,387
2020 PPP Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
PPP Loans Originated	15,387
PPP Loan Balance Outstanding	35
Amount Pledged To PPLF	15,387
2021 PPP Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
PPP Loans Originated	10,967
PPP Loan Balance Outstanding	$ 6,031

Covid-19 Pandemic Response - _2

Covid-19 Pandemic Response - Summary of Loan Portfolio (Detail) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	$ 56,697	$ 57,510
Suspended/Reduction Payment	[2]	1,770	20,562
Resumed Payment	[2]	41,608	30,437
Full Payoff	[3]	13,319	6,511
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	53,200	53,797
Suspended/Reduction Payment	[2]	1,770	20,494
Resumed Payment	[2]	40,121	28,802
Full Payoff	[3]	11,309	4,501
Residential Real Estate [Member] | One-to-Four Family [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	15,646	15,514
Suspended/Reduction Payment	[2]	1,727	12,974
Resumed Payment	[2]	9,376	2,109
Full Payoff	[3]	4,543	431
Residential Real Estate [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	2,907	3,179
Suspended/Reduction Payment	[2]	43	626
Resumed Payment	[2]	1,518	1,287
Full Payoff	[3]	1,346	1,266
Residential Real Estate [Member] | Commercial Real Estate Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	34,306	34,754
Suspended/Reduction Payment	[2]		6,544
Resumed Payment	[2]	28,886	25,406
Full Payoff	[3]	5,420	2,804
Residential Real Estate [Member] | Construction [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	341	350
Suspended/Reduction Payment	[2]		350
Resumed Payment	[2]	341
Commercial and Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	3,436	3,645
Resumed Payment	[2]	1,426	1,635
Full Payoff	[3]	2,010	2,010
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Deferrals Granted	[1]	61	68
Suspended/Reduction Payment	[2]		$ 68
Resumed Payment	[2]	$ 61
[1]	This column equals the current outstanding balance of loans that received a deferral, plus the balance of loans that were deferred and were paid off in full.
[2]	These two columns are the current balance of all loans that received a deferral. The Suspended/Reduced Payment column represents loans currently in a deferral period and the Resumed Payment column represents loans that are no longer in a deferral period and have resumed normal payment.
[3]	This column represents the balance of deferred loans that were paid off in full.

Covid-19 Pandemic Response - Sc

Covid-19 Pandemic Response - Schedule of Past Due and Non-Accrual Loans by Loan Category (Detail) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	$ 31,703	$ 37,442
Special Mention	[1]	8,132	9,375
Sub-standard	[1]	3,543	4,182
Non-accrual	[1],[2]	213	4,378
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	30,575	36,170
Special Mention	[1]	7,773	8,944
Sub-standard	[1]	3,543	4,182
Non-accrual	[1],[2]	213	4,378
Residential Real Estate [Member] | One-to-Four Family [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	10,890	14,887
Special Mention	[1]	213	196
Non-accrual	[1],[2]	213	196
Residential Real Estate [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	1,561	1,913
Residential Real Estate [Member] | Construction [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	341	350
Residential Real Estate [Member] | Commercial Real Estate Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	17,783	19,020
Special Mention	[1]	7,560	8,748
Sub-standard	[1]	3,543	4,182
Non-accrual	[1],[2]		4,182
Commercial and Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	1,067	1,204
Special Mention	[1]	359	431
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Pass Rated / Not Rated	[1]	$ 61	$ 68
[1]	These three columns indicate the risk rating and subsequent outstanding balance of loans that have received a deferral. The Pass Rated/Not Rated, Special Mention and Substandard columns reconcile to the Suspended Payment/Reduced Payment and Resumed Payment columns in the preceding table.
[2]	Nonaccrual loans are risk rated as either special mention or substandard and are included as a balance in those columns.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income and Related Tax Effects (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss)	$ (118)	$ (111)	$ (811)	$ 1,604
Accumulated other comprehensive income, net of tax	$ 84		84		$ 895
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain			761		1,713
Other comprehensive Loss, Tax effect			(184)		(313)
Total other comprehensive income (loss)			577		1,400
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain			(676)		(712)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain			230		254
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain			(446)		(458)
Other comprehensive Loss, Tax effect			(47)		(47)
Total other comprehensive income (loss)			$ (493)		$ (505)

Securities Available for Sale -

Securities Available for Sale - Schedule of Amortized Cost and Fair Value of Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 50,964	$ 53,654
Gross Unrealized Gains	981	1,712
Gross Unrealized Losses	(220)
Fair Value	51,725	55,366
Debt Securities [Member] | U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,783
Gross Unrealized Losses	(75)
Fair Value	9,708
Debt Securities [Member] | US Government-sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,995	1,993
Gross Unrealized Gains		3
Gross Unrealized Losses	(3)
Fair Value	1,992	1,996
Debt Securities [Member] | Corporate [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,020	4,300
Gross Unrealized Gains	43	56
Fair Value	3,063	4,356
Debt Securities [Member] | Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	350	595
Gross Unrealized Gains	1	5
Fair Value	351	600
Debt Securities [Member] | Residential Mortgage-backed Securities, US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,133	32,538
Gross Unrealized Gains	463	919
Gross Unrealized Losses	(142)
Fair Value	23,454	33,457
Debt Securities [Member] | Commercial Mortgage-backed Securities, US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,764	8,857
Gross Unrealized Gains	363	525
Fair Value	9,127	9,382
Debt Securities [Member] | Commercial Mortgage Backed Securities, U.S. Government-guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	239	977
Gross Unrealized Gains	2	24
Fair Value	241	1,001
Debt Securities [Member] | Collateralized Mortgage Obligations, US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	844	996
Gross Unrealized Gains	25	52
Fair Value	869	1,048
Debt Securities [Member] | Collateralized Mortgage Obligations, US Government Guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,836	3,398
Gross Unrealized Gains	84	128
Fair Value	$ 2,920	$ 3,526

Securities Available for Sale_2

Securities Available for Sale - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021USD ($)Debt_Security	Sep. 30, 2020USD ($)
Investments Debt And Equity Securities [Abstract]
Proceeds from sales of available-for-sale securities | $	$ 0	$ 0
Number of debt securities with unrealized losses | Debt_Security	12
Unrealized losses debt securities aggregate depreciation percentage	1.05%

Securities Available for Sale_3

Securities Available for Sale - Investments Classified by Contractual Maturity Date (Detail) $ in Thousands	Sep. 30, 2021USD ($)
Available-for-sale Securities, Debt Maturities, Amortized Cost
Within 1 year	$ 500
After 1 year through 5 years	8,926
After 5 years through 10 years	5,722
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Total	15,148
Mortgage-backed securities	35,816
Available-for-sale Debt Securities, Amortized Cost Basis, Total	50,964
Available-for-sale Securities, Debt Maturities, Fair Value
Within 1 year	502
After 1 year through 5 years	8,912
After 5 years through 10 years	5,700
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Fair Value Total	15,114
Mortgage-backed securities	36,611
Available-for-sale Securities, Debt Securities, Fair Value Total	$ 51,725

Securities Available for Sale_4

Securities Available for Sale - Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value (Detail) - Debt Securities [Member] $ in Thousands	Sep. 30, 2021USD ($)
Schedule of Available-for-sale Securities [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	$ (220)
Less Than Twelve Months, Fair Value	20,772
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	(75)
Less Than Twelve Months, Fair Value	9,708
US Government-sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	(3)
Less Than Twelve Months, Fair Value	1,992
Residential Mortgage-backed Securities, US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	(142)
Less Than Twelve Months, Fair Value	$ 9,072

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses - Summary of Loan Portfolio (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 570,020	$ 489,305
Allowance for loan losses	(6,432)	(6,784)
Net deferred loan costs and fees, and purchase premiums	1,031	1,123
Loans, net	564,619	483,644
Real Estate Sector [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	541,264	458,757
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	185,100	143,893
Commercial Real Estate Loans [Member] | Real Estate Sector [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	185,100	143,893
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	19,896	20,259
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,860	10,289
One-to-Four Family [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	265,561	235,648
One-to-Four Family [Member] | Residential Real Estate [Member] | Real Estate Sector [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	265,561	235,648
Home Equity Loans and Lines of Credit [Member] | Residential Real Estate [Member] | Real Estate Sector [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	56,124	48,166
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	34,479	31,050
Construction [Member] | Real Estate Sector [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 34,479	$ 31,050

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Summary of Activity in the Allowance for Loan Losses by Loan Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 6,523	$ 6,059	$ 6,784	$ 4,280
Provision (credit) for loan losses	(90)	546	(330)	2,338
Loans charged-off	(4)	(11)	(30)	(40)
Recoveries	3	3	8	19
Ending balance	6,432	6,597	6,432	6,597
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,559	2,766	3,402	1,840
Provision (credit) for loan losses	(124)	589	33	1,515
Ending balance	3,435	3,355	3,435	3,355
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	569	319	416	235
Provision (credit) for loan losses	(49)	(75)	102	9
Recoveries		2	2	2
Ending balance	520	246	520	246
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	105	146	127	128
Provision (credit) for loan losses	11	15	15	53
Loans charged-off	(4)	(8)	(30)	(37)
Recoveries	2	1	2	10
Ending balance	114	154	114	154
One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,272	1,553	1,646	1,096
Provision (credit) for loan losses	(50)	30	(427)	480
Recoveries	1		4	7
Ending balance	1,223	1,583	1,223	1,583
Second Mortgages and HELOC [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	404	378	442	289
Provision (credit) for loan losses	45	77	7	166
Loans charged-off		(3)		(3)
Ending balance	449	452	449	452
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	614	897	751	692
Provision (credit) for loan losses	77	(90)	(60)	115
Ending balance	$ 691	$ 807	$ 691	$ 807

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Summary of Additional Information Pertaining to the Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for impaired loans	$ 140		$ 133
Allowance for non-impaired loans	6,292		6,651
Total allowance for loan losses	6,432	$ 6,523	6,784	$ 6,597	$ 6,059	$ 4,280
Impaired loans	3,356		8,949
Non-impaired loans	566,664		480,356
Total loans	570,020		489,305
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for non-impaired loans	3,435		3,402
Total allowance for loan losses	3,435	3,559	3,402	3,355	2,766	1,840
Impaired loans			4,751
Non-impaired loans	185,100		139,142
Total loans	185,100		143,893
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for non-impaired loans	520		416
Total allowance for loan losses	520	569	416	246	319	235
Non-impaired loans	19,896		20,259
Total loans	19,896		20,259
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for non-impaired loans	114		127
Total allowance for loan losses	114	105	127	154	146	128
Non-impaired loans	8,860		10,289
Total loans	8,860		10,289
One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for impaired loans	122		133
Allowance for non-impaired loans	1,101		1,513
Total allowance for loan losses	1,223	1,272	1,646	1,583	1,553	1,096
Impaired loans	2,751		3,575
Non-impaired loans	262,810		232,073
Total loans	265,561		235,648
Second Mortgages and HELOC [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for impaired loans	18
Allowance for non-impaired loans	431		442
Total allowance for loan losses	449	404	442	452	378	289
Impaired loans	605		623
Non-impaired loans	55,519		47,543
Total loans	56,124		48,166
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for non-impaired loans	691		751
Total allowance for loan losses	691	$ 614	751	$ 807	$ 897	$ 692
Non-impaired loans	34,479		31,050
Total loans	$ 34,479		$ 31,050

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Schedule of Past Due and Non-Accrual Loans (Detail) - USD ($) $ in Thousands		Sep. 30, 2021		Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 3,564		$ 540
Non-accrual Loans		1,504		7,173
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		79		102
One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	2,137
Non-accrual Loans		1,014	[1]	1,876
Home Equity Loans and Lines of Credit [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,348	[2]	412
Non-accrual Loans		490	[2]	584
Commercial Real Estate Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				26
Non-accrual Loans				4,713
30 - 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2,521		133
30 - 59 Days Past Due [Member] | Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		62		38
30 - 59 Days Past Due [Member] | One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	1,467
30 - 59 Days Past Due [Member] | Home Equity Loans and Lines of Credit [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		992	[2]	95
60 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		687		64
60 - 89 Days Past Due [Member] | Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		17		64
60 - 89 Days Past Due [Member] | One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	670
90 Days or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		356		343
90 Days or More Past Due [Member] | Home Equity Loans and Lines of Credit [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 356	[2]	317
90 Days or More Past Due [Member] | Commercial Real Estate Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				$ 26
[1]	Subsequent to September 30, 2021
[2]	Subsequent to September 30, 2021, home equity loans and lines of credit with a principal balance totaling $893,000 made payments to become current.

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Schedule of Past Due and Non-Accrual Loans (Parenthetical) (Detail) - Subsequent Event [Member]	1 Months Ended
	Oct. 31, 2021USD ($)
One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Residential one- to four-family	$ 1,400,000
Home Equity Loans and Lines of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Residential one- to four-family	$ 893,000

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Recorded Investment without a valuation allowance	$ 1,784	$ 7,539
Unpaid Principal Balance without a valuation allowance	1,805	7,555
Recorded Investment with a valuation allowance	1,534	1,382
Unpaid Principal Balance with a valuation allowance	1,551	1,394
Related Allowance, Total impaired loans	140	133
Recorded Investment, Total impaired loans	3,318	8,921
Unpaid Principal Balance, Total impaired loans	3,356	8,949
Commercial Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment without a valuation allowance		4,753
Unpaid Principal Balance without a valuation allowance		4,751
One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment without a valuation allowance	1,305	2,160
Unpaid Principal Balance without a valuation allowance	1,318	2,181
Recorded Investment with a valuation allowance	1,426	1,382
Unpaid Principal Balance with a valuation allowance	1,433	1,394
Related Allowance, Total impaired loans	122	133
Home Equity Loans and Lines of Credit [Member] | Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment without a valuation allowance	479	626
Unpaid Principal Balance without a valuation allowance	487	$ 623
Recorded Investment with a valuation allowance	108
Unpaid Principal Balance with a valuation allowance	118
Related Allowance, Total impaired loans	$ 18

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Summary of Additional Information Pertaining to Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 3,367	$ 12,298	$ 7,158	$ 9,850
Interest Income Recognized	21	169	58	304
Cash Basis Interest Recognized	34	61	112	131
Residential Real Estate [Member] | One-to-Four Family [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,718	4,630	3,263	4,563
Interest Income Recognized	19	144	54	277
Cash Basis Interest Recognized	33	61	110	131
Residential Real Estate [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	649	607	574	559
Interest Income Recognized	2	25	4	27
Cash Basis Interest Recognized	$ 1		2
Commercial Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		7,028	$ 3,321	4,713
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		$ 33		$ 15

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)ContractTDR	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)Contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Listed as Accrual	$ 2,844,000		$ 2,844,000		$ 2,915,000
Loans subject to troubled debt restructurings | TDR			0
Trouble debt restructurings, additional funds committed	0		$ 0
Number of Contracts | Contract			17		18
30 - 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings defaulted over 30 days past due	0	$ 0	$ 0	$ 0
One-to-Four Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Listed as Accrual	57,000		$ 57,000
Residential Real Estate [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | TDR			2
Residential Real Estate [Member] | Performing Financial Instruments [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Listed as Accrual	289,000		$ 289,000
Residential Real Estate [Member] | Nonperforming Financial Instruments [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Listed as Accrual	213,000		213,000
Residential Real Estate [Member] | One-to-Four Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Listed as Accrual	$ 2,636,000		$ 2,636,000		$ 2,833,000
Number of Contracts | Contract			14		16
Residential Real Estate [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructuring, interest rate concession period			3 months
Residential Real Estate [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructuring, interest rate concession period			30 years
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Listed as Accrual					$ 40,000
Number of Contracts | Contract					1
Commercial Real Estate Loans [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructuring, interest rate concession period			1 year

Loans and Allowance for Loan_11

Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructuring (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)OfficeLeaseContract	Dec. 31, 2020USD ($)OfficeLeaseContract
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	17	18
TDRs Listed as Accrual	$ 2,844,000	$ 2,915,000
One-to-Four Family [Member]
Financing Receivable Modifications [Line Items]
TDRs Listed as Accrual	$ 57,000
Residential Real Estate [Member] | One-to-Four Family [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	14	16
TDRs Listed as Accrual	$ 2,636,000	$ 2,833,000
Residential Real Estate [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract	3	1
TDRs Listed as Accrual	$ 208,000	$ 42,000
Commercial Real Estate Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Contract		1
TDRs Listed as Accrual		$ 40,000
Trouble Debt Restructurings Listed As Accrual
Financing Receivable Modifications [Line Items]
Number of Contracts | Office	13	14
TDRs Listed as Accrual	$ 1,815,000	$ 1,748,000
Trouble Debt Restructurings Listed As Accrual | Residential Real Estate [Member] | One-to-Four Family [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Office	11	12
TDRs Listed as Accrual	$ 1,716,000	$ 1,666,000
Trouble Debt Restructurings Listed As Accrual | Residential Real Estate [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Office	2	1
TDRs Listed as Accrual	$ 99,000	$ 42,000
Trouble Debt Restructurings Listed As Accrual | Commercial Real Estate Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Office		1
TDRs Listed as Accrual		$ 40,000
Trouble Debt Restructurings Listed As Non Accrual
Financing Receivable Modifications [Line Items]
Number of Contracts | Lease	4	4
TDRs Listed as Accrual	$ 1,029,000	$ 1,167,000
Trouble Debt Restructurings Listed As Non Accrual | Residential Real Estate [Member] | One-to-Four Family [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Lease	3	4
TDRs Listed as Accrual	$ 920,000	$ 1,167,000
Trouble Debt Restructurings Listed As Non Accrual | Residential Real Estate [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | Lease	1
TDRs Listed as Accrual	$ 109,000

Loans and Allowance for Loan_12

Loans and Allowance for Loan Losses - Summary of Company's Loans by Risk Rating (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 570,020	$ 489,305
Note Rated
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	329,026	291,644
Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	227,822	180,803
Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	8,856	11,075
Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,316	5,783
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	185,100	143,893
Commercial Real Estate Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	173,806	129,925
Commercial Real Estate Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	7,751	9,257
Commercial Real Estate Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,543	4,711
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	19,896	20,259
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	19,537	19,828
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	359	431
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	8,860	10,289
Consumer [Member] | Note Rated
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	8,860	10,289
One-to-Four Family [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	265,561	235,648
One-to-Four Family [Member] | Residential Real Estate [Member] | Note Rated
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	264,540	233,773
One-to-Four Family [Member] | Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	365	803
One-to-Four Family [Member] | Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	656	1,072
Second Mortgages and HELOC [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	56,124	48,166
Second Mortgages and HELOC [Member] | Residential Real Estate [Member] | Note Rated
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	55,626	47,582
Second Mortgages and HELOC [Member] | Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	381	584
Second Mortgages and HELOC [Member] | Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	117
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	34,479	31,050
Construction [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 34,479	$ 31,050

Loan Servicing - Additional Inf

Loan Servicing - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Transfers And Servicing [Abstract]
Unpaid principal balances of residential mortgage loans serviced for others	$ 1,960,000,000		$ 1,960,000,000		$ 1,760,000,000
Increase (reduced) the valuation allowance of mortgage servicing rights	$ (39,000)	$ (1,087,000)	$ (395,000)	$ 1,981,000

Loan Servicing - Summary of Act

Loan Servicing - Summary of Activity Relating to Mortgage Servicing Rights (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Mortgage servicing rights:
Balance at beginning of period	$ 18,014	$ 12,090	$ 15,372	$ 9,484
Additions through originations	788	2,570	5,029	6,131
Amortization	(800)	(807)	(2,399)	(1,762)
Balance at end of period	18,002	13,853	18,002	13,853
Valuation allowance:
Balance at beginning of period	2,639	3,996	2,995	928
Provision (release)	(39)	(1,087)	(395)	1,981
Balance at end of period	2,600	2,909	2,600	2,909
Amortized cost, net	15,402	10,944	15,402	10,944
Fair value	$ 15,927	$ 11,014	$ 15,927	$ 11,014

On-Balance Sheet Derivative I_2

On-Balance Sheet Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Derivative Loan Commitments [Member]
Derivative [Line Items]
Derivative, Notional amount	$ 158,085,000	$ 396,551,000
Undesignated Forward Loan Sale Commitments and TBA Securities [Member]
Derivative [Line Items]
Derivative, Notional amount	160,847,000	390,248,000
Other Assets [Member] | Derivative Loan Commitments [Member]
Derivative [Line Items]
Derivative fair value, Asset	2,145,000	11,821,000
Other Assets [Member] | Undesignated Forward Loan Sale Commitments and TBA Securities [Member]
Derivative [Line Items]
Derivative fair value, Asset	639,000	44,000
Other Liabilities [Member] | Undesignated Forward Loan Sale Commitments and TBA Securities [Member]
Derivative [Line Items]
Derivative fair value, Liability	$ 78,000	$ 2,180,000

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Employee Stock Ownership Plan E S O P Disclosures [Line Items]
Loan repaid term			25 years
Number of allocated shares	18,780		18,780
Annual allocation of shares, expiration year			2040
ESOP expense	$ 97,000	$ 52,000	$ 292,000	$ 164,000
Unallocated shares	361,552		361,552
Unallocated shares, value	$ 7,802,000		$ 7,802,000
Common Stock [Member] | Initial Public Offering [Member]
Employee Stock Ownership Plan E S O P Disclosures [Line Items]
Sale of stock, price per share	$ 10		$ 10
The Randolph Savings Charitable Foundation, Inc. [Member] | Initial Public Offering [Member]
Employee Stock Ownership Plan E S O P Disclosures [Line Items]
Sale of share in employee stock ownership plan			469,498

Share Repurchase Program - Addi

Share Repurchase Program - Additional Information (Detail) - USD ($)	Oct. 26, 2021	Oct. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Class Of Stock [Line Items]
Cost of shares repurchased			$ 3,535,000	$ 16,000	$ 8,349,000	$ 1,217,000
October 2020 Share Repurchase Program [Member]
Class Of Stock [Line Items]
Stock repurchase program percentage of outstanding shares repurchased		10.00%
Number of shares authorized to repurchase		552,000
Stock repurchase program expiration date		Oct. 29, 2021
Number of shares repurchased					433,633
Cost of shares repurchased					$ 8,797,000
October 26, 2020 Share Repurchase Program [Member]
Class Of Stock [Line Items]
Stock repurchase program percentage of outstanding shares repurchased	10.00%
Number of shares authorized to repurchase	510,000
Stock repurchase program expiration date	Oct. 29, 2022

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Calculation of Average Number of Shares Outstanding Used to Calculate Basic and Diluted Earnings (Loss) Per Share (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Average number of common shares outstanding	5,233,048	5,503,020	5,316,686	5,511,028
Less: Average unallocated ESOP shares	(363,893)	(382,653)	(368,549)	(387,323)
Average number of common shares outstanding used to calculate basic earnings per share	4,869,155	5,120,367	4,948,137	5,123,705
Effect of dilutive stock options	205,521		205,411	2,372
Average number of common shares outstanding used to calculate dilutive earnings per share	5,074,676	5,120,367	5,153,548	5,126,077

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail)	Aug. 13, 2021$ / sharesshares	Sep. 30, 2021USD ($)shares	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2020USD ($)Officershares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted				40,491	330,118
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option term				10 years	10 years
Options and awards vesting period				5 years
Stock-based compensation expense | $		$ 156,000	$ 138,000	$ 442,000	$ 545,000
Stock Options [Member] | Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Amount attributable to accelerated vesting of units | $					$ 233,000
Number of officer | Officer					2
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards granted				19,750
Grant date fair value per share | $ / shares				$ 20.15
Stock-based compensation expense | $		$ 180,000	$ 115,000	$ 431,000	$ 781,000
Restricted Stock [Member] | Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Amount attributable to accelerated vesting of units | $					$ 450,000
Number of officer | Officer					2
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards granted				18,000
Grant date fair value per share | $ / shares				$ 20.15
Minimum [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options and awards vesting period					3 years
Maximum [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options and awards vesting period					5 years
Two Thousand Seventeen Stock Option and Incentive Plan [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance		586,872		586,872
Stock option term				10 years
Two Thousand Seventeen Stock Option and Incentive Plan [Member] | Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance		234,749		234,749
Two Thousand Seventeen Stock Option and Incentive Plan [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options and awards vesting period				3 years
Two Thousand Seventeen Stock Option and Incentive Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options and awards vesting period				5 years
2020 Inducement Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options and awards vesting period				5 years
2020 Inducement Plan [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted				44,118
2020 Inducement Plan [Member] | Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards granted				15,000
2021 Equity Plan [Member] | Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options and awards vesting period	3 years
Awards granted	19,750
Grant date fair value per share | $ / shares	$ 20.15
2021 Equity Plan [Member] | Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards granted	18,000
Grant date fair value per share | $ / shares	$ 20.15
2021 Equity Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance		100,000		100,000

Stock Based Compensation - Summ

Stock Based Compensation - Summary of Grants of Options to Purchase Shares of Common Stock (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted	40,491	330,118
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period (years)	5 years
Expiration period (years)	10 years	10 years
Expected volatility	30.98%	27.65%
Expected life (years)	6 years 2 months 12 days	6 years 2 months 12 days
Risk free interest rate	0.64%
Risk free interest rate, minimum		0.45%
Risk free interest rate, maximum		1.10%
Option fair value	$ 6.20
Minimum [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period (years)		3 years
Option fair value		$ 2.69
Maximum [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period (years)		5 years
Option fair value		$ 4.32

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock Options Activity (Detail) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Stock Option Grants
Beginning Balance	587,168
Granted	40,491	330,118
Exercised	(334)
Forfeited	(4,500)
Expired
Ending Balance	622,825		587,168
Exercisable at September 30, 2021	241,118
Unrecognized compensation cost (inclusive of directors' options)	$ 1,243,252
Weighted Average Exercise Price
Beginning Balance	$ 13.32
Granted	20.06
Exercised	15.74
Forfeited	11.48
Ending Balance	13.77		$ 13.32
Exercisable at September 30, 2021	$ 14.16
Weighted Average Remaining Contractual Term and Aggregate Intrinsic Value
Weighted Average Remaining Contractual Term	7 years 9 months 3 days		8 years 4 months 24 days
Weighted Average Remaining Contractual Term, Exercisable	7 years 14 days
Aggregate Intrinsic Value, Outstanding	$ 4,864,981
Aggregate Intrinsic Value, Exercisable	$ 1,789,693
Weighted Average Remaining Contractual Term	7 years 9 months 3 days		8 years 4 months 24 days
Stock Options [Member]
Stock Option Grants
Weighted average remaining recognition period (years)	2 years 4 months 2 days

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Activity in Restricted Stock Awards Under Equity Plan (Detail)	9 Months Ended
	Sep. 30, 2021USD ($)$ / sharesshares
Restricted Stock Awards [Member]
Restricted Stock Awards
Beginning Balance | shares	122,012
Granted | shares	19,750
Vested | shares	(20,463)
Forfeited | shares	(1,056)
Ending Balance | shares	120,243
Unrecognized compensation cost | $	$ 1,315,446
Weighted average remaining recognition period (years)	2 years 6 months 21 days
Weighted Average Grant Price
Beginning Balance | $ / shares	$ 12.72
Granted | $ / shares	20.15
Vested | $ / shares	12.35
Forfeited | $ / shares	11.48
Ending Balance | $ / shares	$ 14.02
Performance-Based Restricted Stock Units [Member]
Restricted Stock Awards
Granted | shares	18,000
Ending Balance | shares	18,000
Unrecognized compensation cost | $	$ 344,509
Weighted average remaining recognition period (years)	2 years 6 months 14 days
Weighted Average Grant Price
Granted | $ / shares	$ 20.15
Ending Balance | $ / shares	$ 20.15
Restricted Stock Awards and Performance-Based Restricted Stock Units [Member]
Restricted Stock Awards
Beginning Balance | shares	122,012
Granted | shares	37,750
Vested | shares	(20,463)
Forfeited | shares	(1,056)
Ending Balance | shares	138,243
Unrecognized compensation cost | $	$ 1,659,955
Weighted average remaining recognition period (years)	2 years 6 months 21 days
Weighted Average Grant Price
Beginning Balance | $ / shares	$ 12.72
Granted | $ / shares	20.15
Vested | $ / shares	12.35
Forfeited | $ / shares	11.48
Ending Balance | $ / shares	$ 14.81

Stock-Based Compensation - Su_3

Stock-Based Compensation - Summary of Activity in Restricted Stock Awards Under Equity Plan (Parenthetical) (Detail)	Sep. 30, 2021shares
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of shares that could vest	27,000

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities - Schedule of Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	$ 51,725	$ 55,366
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	51,725	55,366
Fair value, Loans held for sale	75,400	119,112
Derivative assets	2,784	11,865
Derivative liabilities	78	2,180
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Portfolio loans	18,532	13,780
Fair value, Loans held for sale	75,400	119,112
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	51,725	55,366
Fair Value, Measurements, Recurring [Member] | Derivative Loan Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,145	11,821
Fair Value, Measurements, Recurring [Member] | Forward Loan Sale Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	639	44
Fair Value, Measurements, Recurring [Member] | Forward Loan Sale Commitments, including TBAs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	78	2,180
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Portfolio loans	18,532	13,780
Fair value, Loans held for sale	75,400	119,112
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	51,725	55,366
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Derivative Loan Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,145	11,821
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Forward Loan Sale Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	639	44
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Forward Loan Sale Commitments, including TBAs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	$ 78	$ 2,180

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities - Additional information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, assets, level 1 to level 2 transfers, amount	$ 0	$ 0	$ 0	$ 0
Fair value, assets, level 2 to level 1 transfers, amount	0	0	0	0
Fair value, liabilities, level 1 to level 2 transfers, amount	0	0	0	0
Fair value, liabilities, level 2 to level 1 transfers, amount	0	0	0	0
Increase (decrease) in valuation allowance of mortgage servicing rights	(39,000)	$ (1,087,000)	(395,000)	$ 1,981,000
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value on nonrecurring basis	$ 0		$ 0		$ 0

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities - Schedule of Assets Recorded at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights, fair value	$ 15,927		$ 11,014
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) on assets held, mortgage servicing rights	395
Gains (Losses) on assets held	395
Fair Value, Nonrecurring | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights, fair value	15,402	$ 12,377
Assets, Fair Value Disclosure	15,402	12,377
Fair Value, Nonrecurring | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Collateral dependent impaired loans	1,431	6,318
Fair value, Foreclosed real estate		132
Assets, Fair Value Disclosure	$ 1,431	$ 6,450

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities - Summary of Carrying Values, Estimated Fair Values and Placement in Fair Value Hierarchy of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial assets:
Securities available for sale	$ 51,725	$ 55,366
Level 2 [Member]
Financial assets:
Securities available for sale	51,725	55,366
Loans held for sale	75,400	119,112
Derivative assets	2,784	11,865
Financial liabilities:
Deposits	573,184	528,786
FRB advances		11,431
FHLBB advances	63,319	63,071
Derivative liabilities	78	2,180
Level 3 [Member]
Financial assets:
Loans, net	567,688	490,914
Reported Value Measurement
Financial assets:
Securities available for sale	51,725	55,366
Loans held for sale	75,400	119,112
Loans, net	564,619	483,644
Derivative assets	2,784	11,865
Financial liabilities:
Deposits	573,405	528,307
FRB advances		11,431
FHLBB advances	62,900	61,895
Derivative liabilities	78	2,180
Estimate of Fair Value Measurement
Financial assets:
Securities available for sale	51,725	55,366
Loans held for sale	75,400	119,112
Loans, net	567,688	490,914
Derivative assets	2,784	11,865
Financial liabilities:
Deposits	573,184	528,786
FRB advances		11,431
FHLBB advances	63,319	63,071
Derivative liabilities	$ 78	$ 2,180

Commitments and Contingencies -

Commitments and Contingencies - Summary of Financial Instruments Outstanding Contract Amounts Represent Credit Risk (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments to Originate Loans [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	$ 182,656	$ 411,401
Unused Lines and Letters of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	82,234	71,458
Unadvanced Funds on Construction Loans [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	14,449	9,110
Overdraft Lines of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	$ 7,992	$ 7,969

Segment Information - Additiona

Segment Information - Additional Information (Detail)	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2021	Sep. 30, 2021USD ($)OfficeSegment	Sep. 30, 2020USD ($)
Segment Reporting Information [Line Items]
Number of business segments | Segment				2
Number of branch offices | Office				5
Servicing fees amount	$ (274,000)	$ (1,180,000)		$ (1,434,000)	$ 1,428,000
Envision Mortgage [Member]
Segment Reporting Information [Line Items]
Premium percentage for new loans				1.50%	1.50%
Premium income	696,000	357,000		$ 2,195,000	$ 1,051,000
Percentage of fees for HELOC				1.00%	1.00%
Servicing fees amount	$ (496,000)	$ (1,278,000)		$ (1,843,000)	$ 1,147,000
Envision Bank [Member]
Segment Reporting Information [Line Items]
Percentage of loan servicing fees	0.25%	0.14%	0.14%		0.14%
Servicing fees amount	$ 222,000	$ 98,000		$ 409,000	$ 281,000

Segment Information - Summary o

Segment Information - Summary of Segment Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020		Dec. 31, 2020
Segment Reporting Information [Line Items]
Net interest income		$ 5,976,000	$ 4,669,000	$ 16,266,000	$ 13,827,000
Provision (credit) for loan losses		(90,000)	546,000	(330,000)	2,338,000
Net interest income after provision (credit) for loan losses		6,066,000	4,123,000	16,596,000	11,489,000
Non-interest income:
Customer service fees		410,000	330,000	1,196,000	902,000
Gain on loan origination and sale activities, net	[1]	7,925,000	18,459,000	26,157,000	40,667,000
Mortgage servicing fees, net		274,000	1,180,000	1,434,000	(1,428,000)
Other		236,000	262,000	796,000	734,000
Total non-interest income		8,845,000	20,231,000	29,583,000	40,875,000
Non-interest expenses:
Salaries and employee benefits		6,381,000	7,911,000	22,128,000	24,439,000	[2]
Occupancy and equipment		714,000	859,000	2,079,000	2,395,000
Other non-interest expenses		2,764,000	2,281,000	8,230,000	6,555,000
Total non-interest expenses		9,859,000	11,051,000	32,437,000	33,389,000
Income (loss) before income taxes and elimination of inter-segment profit		5,052,000	13,303,000	13,742,000	18,975,000
Elimination of inter-segment profit		(696,000)	(357,000)	(2,195,000)	(1,051,000)
Income before income taxes		4,356,000	12,946,000	11,547,000	17,924,000
Income tax expense		1,230,000	2,661,000	2,732,000	3,266,000
Net income		3,126,000	10,285,000	8,815,000	14,658,000
Total assets		751,097,000	722,968,000	751,097,000	722,968,000		$ 721,072,000
Envision Bank [Member]
Segment Reporting Information [Line Items]
Net interest income		5,243,000	4,032,000	13,978,000	11,970,000
Provision (credit) for loan losses		(90,000)	546,000	(330,000)	2,338,000
Net interest income after provision (credit) for loan losses		5,333,000	3,486,000	14,308,000	9,632,000
Non-interest income:
Customer service fees		394,000	309,000	1,125,000	827,000
Mortgage servicing fees, net		(222,000)	(98,000)	(409,000)	(281,000)
Other		105,000	93,000	412,000	318,000
Total non-interest income		277,000	304,000	1,128,000	864,000
Non-interest expenses:
Salaries and employee benefits		1,742,000	1,959,000	5,290,000	6,983,000	[2]
Occupancy and equipment		473,000	437,000	1,325,000	1,305,000
Other non-interest expenses		1,046,000	1,084,000	3,395,000	3,286,000
Total non-interest expenses		3,261,000	3,480,000	10,010,000	11,574,000
Income (loss) before income taxes and elimination of inter-segment profit		2,349,000	310,000	5,426,000	(1,078,000)
Total assets		623,447,000	573,003,000	623,447,000	573,003,000
Envision Mortgage [Member]
Segment Reporting Information [Line Items]
Net interest income		733,000	637,000	2,288,000	1,857,000
Net interest income after provision (credit) for loan losses		733,000	637,000	2,288,000	1,857,000
Non-interest income:
Customer service fees		16,000	21,000	71,000	75,000
Gain on loan origination and sale activities, net	[1]	7,925,000	18,459,000	26,157,000	40,667,000
Mortgage servicing fees, net		496,000	1,278,000	1,843,000	(1,147,000)
Other		131,000	169,000	384,000	416,000
Total non-interest income		8,568,000	19,927,000	28,455,000	40,011,000
Non-interest expenses:
Salaries and employee benefits		4,639,000	5,952,000	16,838,000	17,456,000	[2]
Occupancy and equipment		241,000	422,000	754,000	1,090,000
Other non-interest expenses		1,718,000	1,197,000	4,835,000	3,269,000
Total non-interest expenses		6,598,000	7,571,000	22,427,000	21,815,000
Income (loss) before income taxes and elimination of inter-segment profit		2,703,000	12,993,000	8,316,000	20,053,000
Total assets		$ 127,650,000	$ 149,965,000	$ 127,650,000	$ 149,965,000
[1]	Before elimination of inter-segment profit.
[2]	Salaries and benefits for the nine months ended September 30, 2020, include the severance and vested stock acceleration costs related to the retirement of the Chief Executive Officer and Chief Financial Officer of the Bank. Total cost of this event was $1.38 million, of which $1.03 million was allocated to the Bank segment and the remainder, $344,000 was allocated to the mortgage segment.

Segment Information - Summary_2

Segment Information - Summary of Segment Information (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2020USD ($)
Salaries and benefits cost including the severance and vested stock acceleration costs	$ 1,380,000
Bank Segment [Member]
Salaries and benefits cost including the severance and vested stock acceleration costs	1,030,000
Mortgage Segment [Member]
Salaries and benefits cost including the severance and vested stock acceleration costs	$ 344,000

Mortgage Banking Income - Compo

Mortgage Banking Income - Components of Gain on Loan Origination and Sale Activities and Mortgage Servicing Fees (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Gain on loan origination and sale activities, net
Gain on sale of mortgage loans and realized gain from derivative financial instruments, net		$ 6,339	$ 11,131	$ 28,760	$ 21,296
Net change in fair value of loans held for sale and portfolio loans accounted for at fair value		549	879	(2,176)	2,367
Capitalized residential mortgage loan servicing rights		783	2,570	5,056	6,132
Net change in fair value of derivative loan commitments and forward loan sale commitments		(442)	3,522	(7,678)	9,821
Gain on loan origination and sales activities, net		7,229	18,102	23,962	39,616
Mortgage servicing fees, net
Residential mortgage loan servicing fees		1,282	899	3,657	2,315
Amortization of residential mortgage loan servicing rights		(795)	(806)	(2,366)	(1,762)
Release (provision) to the valuation allowance of mortgage loan servicing rights		39	1,087	395	(1,981)
Sub-servicer expenses (1)	[1]	(252)		(252)
Mortgage servicing fees, net		274	1,180	1,434	(1,428)
Total gain on loan origination and sales activities and mortgage servicing fees		$ 7,503	$ 19,282	$ 25,396	$ 38,188
[1]	Sub-servicer expenses were first incurred during the three months ended September 30, 2021, due to a conversion of the Company’s mortgage loan servicing activities. Previously, all expenses related to servicing mortgage loans serviced for others were included in non-interest expenses.