Territorial Bancorp (TBNK) 10-Q 8 Nov 23 2023 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Oct. 31, 2023
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2023
Entity File Number	001-34403
Entity Registrant Name	Territorial Bancorp Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	26-4674701
Entity Address, Address Line One	1003 Bishop Street, Pauahi Tower Suite 500
Entity Address, City or Town	Honolulu
Entity Address, State or Province	HI
Entity Address, Postal Zip Code	96813
City Area Code	808
Local Phone Number	946-1400
Title of 12(b) Security	Common stock
Trading Symbol	TBNK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		8,826,613
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001447051
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 89,122	$ 40,553
Investment securities available for sale, at fair value	19,143	20,821
Investment securities held to maturity, at amortized cost (fair value of $536,534 and $591,084 at September 30, 2023 and December 31, 2022, respectively)	695,641	717,773
Loans receivable	1,311,421
Loans receivable		1,296,796
Allowance for credit/loan losses	(5,003)	(2,032)
Allowance for credit/loan losses		(2,032)
Loans receivable, net of allowance for credit/loan losses	1,306,418
Loans receivable, net of allowance for credit/loan losses		1,294,764
Federal Home Loan Bank stock, at cost	12,844	8,197
Federal Reserve Bank stock, at cost	3,177	3,170
Accrued interest receivable	6,131	6,115
Premises and equipment, net	7,347	7,599
Right-of-use asset, net	12,964	14,498
Bank-owned life insurance	48,412	47,783
Deferred income tax assets, net	3,252	1,643
Prepaid expenses and other assets	6,776	6,676
Total assets	2,211,227	2,169,592
Liabilities:
Deposits	1,651,013	1,716,152
Advances from the Federal Home Loan Bank	256,000	141,000
Securities sold under agreements to repurchase	10,000	10,000
Accounts payable and accrued expenses	24,349	24,180
Lease liability	17,385	15,295
Income taxes payable	479	838
Advance payments by borrowers for taxes and insurance	3,251	5,577
Total liabilities	1,962,477	1,913,042
Commitments and contingencies: (Note 15)
Stockholders' Equity:
Common stock, $0.01 par value; authorized 100,000,000 shares; issued and outstanding 8,826,613 and 9,071,076 shares at September 30, 2023 and December 31, 2022, respectively	88	91
Additional paid-in capital	47,991	51,825
Unearned ESOP shares	(2,569)	(2,936)
Retained earnings	211,741	215,314
Accumulated other comprehensive loss	(8,501)	(7,744)
Total stockholders' equity	248,750	256,550
Total liabilities and stockholders' equity	$ 2,211,227	$ 2,169,592

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Consolidated Balance Sheets
Investment securities held to maturity, fair value (in dollars)	$ 536,534	$ 591,084
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, authorized shares	50,000,000
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Common stock, par value (in dollars per share)	$ 0.01
Common stock, authorized shares	100,000,000
Common stock, shares issued	8,826,613	9,071,076
Common stock, shares outstanding	8,826,613	9,071,076

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Loans	$ 11,886,000	$ 11,376,000	$ 35,037,000	$ 33,909,000
Investment securities	4,447,000	4,402,000	13,512,000	11,753,000
Other investments	1,051,000	373,000	2,848,000	816,000
Total interest income	17,384,000	16,151,000	51,397,000	46,478,000
Interest expense:
Deposits	5,408,000	1,242,000	13,261,000	2,577,000
Advances from the Federal Home Loan Bank	1,896,000	522,000	4,782,000	1,549,000
Securities sold under agreements to repurchase	46,000	46,000	137,000	137,000
Total interest expense	7,350,000	1,810,000	18,180,000	4,263,000
Net interest income	10,034,000	14,341,000	33,217,000	42,215,000
Reversal of provision for credit losses	(259,000)		(147,000)
Reversal of provision for credit losses		(109,000)		(603,000)
Net interest income after reversal of provision for credit losses	10,293,000	14,450,000	33,364,000	42,818,000
Noninterest income:
Service and other fees	298,000	339,000	1,022,000	1,092,000
Income on bank-owned life insurance	218,000	200,000	628,000	591,000
Net gain (loss) on sale of loans			10,000	(3,000)
Other	73,000	76,000	208,000	1,359,000
Total noninterest income	589,000	615,000	1,868,000	3,039,000
Noninterest expense:
Salaries and employee benefits	5,176,000	5,513,000	15,723,000	16,518,000
Occupancy	1,819,000	1,682,000	5,201,000	4,924,000
Equipment	1,263,000	1,317,000	3,878,000	3,749,000
Federal deposit insurance premiums	246,000	145,000	737,000	429,000
Other general and administrative expenses	1,163,000	1,112,000	3,251,000	3,291,000
Total noninterest expense	9,667,000	9,769,000	28,790,000	28,911,000
Income before income taxes	1,215,000	5,296,000	6,442,000	16,946,000
Income taxes	335,000	1,405,000	1,749,000	4,235,000
Net income	$ 880,000	$ 3,891,000	$ 4,693,000	$ 12,711,000
Basic earnings per share (in dollars per share)	$ 0.10	$ 0.44	$ 0.54	$ 1.42
Diluted earnings per share (in dollars per share)	0.10	0.44	0.53	1.41
Cash dividends declared per common share (in dollars per share)	$ 0.23	$ 0.23	$ 0.69	$ 0.69
Basic weighted-average shares outstanding (in shares)	8,577,632	8,802,010	8,656,915	8,885,626
Diluted weighted-average shares outstanding (in shares)	8,610,289	8,846,611	8,705,784	8,938,808

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Consolidated Statements of Comprehensive Income
Net income	$ 880	$ 3,891	$ 4,693	$ 12,711
Unrealized gain (loss) on securities	(780)	(1,114)	(757)	(1,991)
Total other comprehensive income (loss), net of tax	(780)	(1,114)	(757)	(1,991)
Comprehensive income	$ 100	$ 2,777	$ 3,936	$ 10,720

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Unearned ESOP Shares	Retained Earnings	Accumulated Other Comprehensive (Loss)/Income	Total
Balance at Dec. 31, 2021	$ 93	$ 56,951	$ (3,425)	$ 208,227	$ (5,524)	$ 256,322
Balance (in shares) at Dec. 31, 2021	9,324,060
Increase (Decrease) in Stockholders' Equity
Net income				12,711		12,711
Other comprehensive (loss) income					(1,991)	(1,991)
Cash dividends declared				(6,151)		(6,151)
Share-based compensation		256				256
Share-based compensation (in shares)	19,227
Allocation of ESOP shares		467	367			834
Repurchase of shares of common stock	$ (2)	(5,234)				(5,236)
Repurchase of shares of common stock (in shares)	(229,619)
Balance at Sep. 30, 2022	$ 91	52,440	(3,058)	214,787	(7,515)	256,745
Balance (in shares) at Sep. 30, 2022	9,113,668
Balance at Jun. 30, 2022	$ 91	52,464	(3,181)	212,932	(6,401)	255,905
Balance (in shares) at Jun. 30, 2022	9,120,458
Increase (Decrease) in Stockholders' Equity
Net income				3,891		3,891
Other comprehensive (loss) income					(1,114)	(1,114)
Cash dividends declared				(2,036)		(2,036)
Share-based compensation		(18)				(18)
Allocation of ESOP shares		135	123			258
Repurchase of shares of common stock		(141)				(141)
Repurchase of shares of common stock (in shares)	(6,790)
Balance at Sep. 30, 2022	$ 91	52,440	(3,058)	214,787	(7,515)	256,745
Balance (in shares) at Sep. 30, 2022	9,113,668
Balance at Dec. 31, 2022	$ 91	51,825	(2,936)	215,314	(7,744)	256,550
Balance (in shares) at Dec. 31, 2022	9,071,076
Increase (Decrease) in Stockholders' Equity
Net income				4,693		4,693
Other comprehensive (loss) income					(757)	(757)
Cumulative change in accounting principle (1)				(2,319)		(2,319)
Cash dividends declared				(5,947)		(5,947)
Share-based compensation		90				90
Share-based compensation (in shares)	12,729
Allocation of ESOP shares		221	367			588
Repurchase of shares of common stock	$ (3)	(4,145)				(4,148)
Repurchase of shares of common stock (in shares)	(257,192)
Balance at Sep. 30, 2023	$ 88	47,991	(2,569)	211,741	(8,501)	248,750
Balance (in shares) at Sep. 30, 2023	8,826,613
Balance at Jun. 30, 2023	$ 88	48,110	(2,691)	212,848	(7,721)	250,634
Balance (in shares) at Jun. 30, 2023	8,848,511
Increase (Decrease) in Stockholders' Equity
Net income				880		880
Other comprehensive (loss) income					(780)	(780)
Cash dividends declared				(1,987)		(1,987)
Share-based compensation		88				88
Allocation of ESOP shares		14	122			136
Repurchase of shares of common stock		(221)				(221)
Repurchase of shares of common stock (in shares)	(21,898)
Balance at Sep. 30, 2023	$ 88	$ 47,991	$ (2,569)	$ 211,741	$ (8,501)	$ 248,750
Balance (in shares) at Sep. 30, 2023	8,826,613

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Consolidated Statements of Stockholders' Equity, Share Data
Cash dividends declared per common share (in dollars per share)	$ 0.23	$ 0.23	$ 0.69	$ 0.69
Allocation of ESOP shares, shares	12,233		36,700
Common Stock
Consolidated Statements of Stockholders' Equity, Share Data
Allocation of ESOP shares, shares		12,233		36,700

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 4,693,000	$ 12,711,000
Adjustments to reconcile net income to net cash used in operating activities:
Reversal of provision for credit losses	(147,000)
Reversal of provision for credit losses		(603,000)
Depreciation and amortization	839,000	916,000
Deferred income tax expense	(492,000)	314,000
(Accretion) amortization of fees, discounts, and premiums, net	(267,000)	(109,000)
Amortization of right-of-use asset	2,124,000	2,166,000
Origination of loans held for sale	(813,000)	(5,302,000)
Proceeds from sales of loans held for sale	823,000	5,299,000
(Gain) loss on sale of loans, net	(10,000)	3,000
Net loss on disposal of premises and equipment	5,000
Gain on bank-owned life insurance		(1,138,000)
ESOP expense	588,000	834,000
Share-based compensation expense	90,000	256,000
Net decrease (increase) in accrued interest receivable	(62,000)	(275,000)
Net increase in bank-owned life insurance	(629,000)	(591,000)
Net decrease (increase) in prepaid expenses and other assets	(103,000)	156,000
Net decrease in accounts payable and accrued expenses	137,000	1,258,000
Net decrease in lease liability	1,500,000	(2,181,000)
Net increase (decrease) in advance payments by borrowers for taxes and insurance	(2,326,000)	(3,167,000)
Net increase in income taxes payable	(359,000)	821,000
Net cash used in operating activities	5,591,000	11,368,000
Cash flows from investing activities:
Purchases of investment securities held to maturity	(6,693,000)	(132,612,000)
Purchases of investment securities available for sale		(24,760,000)
Principal repayments on investment securities held to maturity	28,900,000	51,609,000
Principal repayments on investment securities available for sale	686,000	948,000
Principal repayments on loans receivable, net of loan originations	(14,516,000)	8,459,000
Purchases of Federal Home Loan Bank stock	(5,887,000)	(24,000)
Proceeds from redemption of Federal Home Loan Bank stock	1,240,000
Purchases of Federal Reserve Bank stock	(8,000)	(13,000)
Proceeds from redemption of Federal Reserve Bank Stock	1,000
Proceeds from bank-owned life insurance		5,569,000
Purchases of premises and equipment	(592,000)	(2,965,000)
Net cash provided by (used in) investing activities	3,131,000	(93,789,000)
Cash flows from financing activities:
Net decrease in deposits	(65,139,000)	30,025,000
Proceeds from advances from the Federal Home Loan Bank	146,000,000
Repayments of advances from the Federal Home Loan Bank	(31,000,000)
Purchases of Fed Funds	20,000
Sales of Fed Funds	(20,000)
Repurchases of common stock	(4,026,000)	(4,999,000)
Cash dividends paid	(5,988,000)	(6,178,000)
Net cash provided by (used in) financing activities	39,847,000	18,848,000
Net change in cash and cash equivalents	48,569,000	(63,573,000)
Cash and cash equivalents at beginning of the year	40,553,000	99,859,000
Cash and cash equivalents at end of the year	89,122,000	36,286,000
Cash paid for:
Interest on deposits and borrowings	17,405,000	3,947,000
Income taxes	2,600,000	3,100,000
Supplemental disclosure of noncash investing and financing activities:
Company stock repurchased through stock swap and net settlement transactions	122,000	237,000
Establishment of right-of-use asset, net of incentives and modifications	590,000	6,833,000
Establishment of lease liability, net of modifications	$ 590,000	$ 6,833,000

Organization

Organization	9 Months Ended
	Sep. 30, 2023
Organization
Organization	(1) Organization ​ Territorial Bancorp Inc. (the Company) is a Maryland corporation and is the holding company for Territorial Savings Bank (the Bank). Territorial Savings Bank is a Hawaii state-chartered bank headquartered in Honolulu, Hawaii and is a member of the Federal Reserve System. Territorial Savings Bank has an inactive subsidiary, Territorial Financial Services, Inc.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2023
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	(2) Summary of Significant Accounting Policies ​ (a) Basis of Presentation ​ The accompanying unaudited interim condensed consolidated financial statements of Territorial Bancorp Inc. have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited interim condensed consolidated financial statements and notes should be read in conjunction with the Company’s consolidated financial statements and notes thereto filed as part of the Annual Report on Form 10-K for the year ended December 31, 2022. In the opinion of management, all adjustments necessary for a fair presentation have been made and consist only of normal recurring adjustments. Interim results of operations are not necessarily indicative of results to be expected for the year. ​ (b) Allowance of Credit Losses (ACL) on Loans and Securities ​ The current expected credit losses (CECL) accounting standard requires an estimate of the credit losses expected over the life of the financial instrument. CECL replaces the incurred loss approach that delayed the recognition of a credit loss until it was probable that a loss event occurred. The ACL is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the ACL during the period when management deems the loan to be uncollectible and all interest previously accrued but not collected is reversed against the current period ACL. ​ The estimate of expected credit losses is based on information about past events, current conditions, and reasonable and supportable forecasts that affect the collectability of financial instruments. Historical loss experience is generally the starting point for estimating expected credit losses. The Company considers whether the historical loss experience should be adjusted for asset specific risk characteristics or current conditions at the reporting date that did not exist over the historical reporting period. These qualitative adjustments can include changes in the economy, loan underwriting standards, and delinquency trends. The Company then considers future economic conditions as part of the one year reasonable and supportable forecast period. ​ The Bank’s loan portfolio is segmented into three pools: real estate, commercial and consumer loans. Only three pools are used to segment the Bank’s loan portfolio because loans within the pools share similar risk characteristics and were originated using similar underwriting standards. Loans that do not share similar risk characteristics would be evaluated on an individual basis and excluded from the collective evaluation. Collateral dependent loans are not considered to share the same risk characteristics. A loan is considered to be collateral dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the sale or operation of the collateral. For loans which are considered to be collateral dependent, the Company has elected to estimate the expected credit loss based on the fair value of the collateral less selling costs. If the fair value of the collateral less selling costs is less than the loan’s amortized cost basis, the Company records a partial charge-off to reduce the loan’s amortized cost basis for the difference between the collateral fair value less selling costs and the amortized cost basis. ​ The real estate pool consists primarily of residential and commercial mortgage loans secured by real estate in Hawaii, with fixed interest rates, loan terms of up to 30 years, and were originated using similar loan terms. The consumer loan pool consists primarily of home equity lines of credit secured by real estate in Hawaii, personal loans, and unsecured personal lines of credit. The primary credit risk characteristics inherent in the residential mortgage loan and consumer loan portfolios are a decline in economic conditions, such as elevated levels of unemployment, and declines in Hawaii residential real estate values. The commercial loan pool consists of business loans. Although the commercial loan portfolio is subject to the same risk of declines in economic conditions, the primary risk characteristics inherent in this portfolio include the ability of the borrower to sustain cash flows from business operations, the ability to control operational expenses to satisfy contractual debt payments, and the ability to utilize personal or business resources to pay their contractual debt payments if the operational cash flows are not sufficient. ​ The ACL on loans and accrued interest is calculated on a loan by loan basis. If the loan’s amortized cost basis is less than the total present value of cash flows calculated using a discounted cash flow approach, the ACL is equal to the amortized cost basis minus the total present value of cash flows on the loan discounted by the loan’s effective interest rate. The expected cash flows include estimates of loan charge-offs, recoveries, and prepayments. The expected cash flows on the loans are adjusted using forecasts of economic variables which have a strong correlation with loan charge-offs, recoveries, and prepayments during the one year reasonable and supportable forecast period. After the reasonable and supportable forecast period, the historical reversion rate is used to calculate loan charge-offs, recoveries, and prepayments for the remaining expected life of the loan. The reversion rate is based on historical averages and applied on a straight-line basis. Qualitative adjustments may be made to account for current conditions and forward looking events not captured in the quantitative calculation. ​ Loans receivable are stated at amortized cost which includes the principal amount outstanding, less the allowance for credit/loan losses, deferred loan origination fees and costs, commitment fees, and cumulative net charge-offs. Interest income on loans receivable is accrued as earned. million as of September 30, 2023, and is included in accrued interest receivable on the Consolidated Balance Sheet. ​ The Company determines delinquency status by considering the number of days full payments required by the contractual terms of the loan are past due. The Company has a policy of placing loans on a nonaccrual basis when 90 days or more contractually delinquent or when, in the opinion of management, collection of all or part of the principal balance appears doubtful, unless the loans are well secured and in the process of collection. When a loan is placed on nonaccrual status, all interest previously accrued and not collected is reversed against current period provision for credit losses. For nonaccrual loans, the Company records payments received as a reduction in principal. A nonaccrual loan may be restored to an accrual basis when principal and interest payments are current and full payment of principal and interest is expected. ​ The Company’s off-balance sheet credit exposures are comprised of unfunded portions of existing loans, such as lines of credit and construction loans, and commitments to originate loans that are not conditionally cancellable by the Company. Changes to the reserve for off-balance sheet credit exposures are recorded through increases or decreases to the provision for credit losses on the Consolidated Statements of Income. There were no reserves for off-balance sheet credit exposures at September 30, 2023 or December 31, 2022. ​ While management utilizes its best judgment and information available, the adequacy of the ACL and the reserve for off-balance sheet credit exposures is determined by certain factors outside of the Company's control, such as the performance of our portfolios, changes in the economic environment including economic uncertainty, changes in interest rates and loan prepayments, and the view of the regulatory authorities toward classification of assets and the level of ACL and the reserve for off-balance sheet credit exposures. Additionally, the level of ACL and the reserve for off-balance sheet credit exposures may fluctuate based on the balance and mix of the loan portfolio, changes in loan prepayments and off-balance sheet credit exposures, changes in charge-off rates, and changes in forecasted economic conditions. If actual results differ significantly from our assumptions, our ACL and the reserve for off-balance sheet credit exposures may not be sufficient to cover inherent losses in our loan portfolio, resulting in additions to our ACL and an increase in the provision for credit losses. ​

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	9 Months Ended
	Sep. 30, 2023
Recently Issued Accounting Pronouncements
Recently Issued Accounting Pronouncements	(3) Recently Issued and Adopted Accounting Pronouncements ​ In June 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The ASU changes the threshold for recognizing losses from a “probable” to an “expected” model. The new model is referred to as the current expected credit loss model and applies to loans, leases, held-to-maturity investments, loan commitments, and financial guarantees. The standard requires the measurement of all expected credit losses for financial assets as of the reporting date (including historical experience, current conditions, and reasonable and supportable forecasts) and enhanced disclosures that will help financial statement users understand the estimates and judgments used in estimating credit losses and evaluating the credit quality of an organization’s portfolio. The amendment was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. In November 2019, the FASB issued an update that delayed the effective date of the amendment for smaller reporting companies, as defined by the Securities and Exchange Commission, to fiscal years beginning after December 15, 2022. The Company is a smaller reporting company. The Company adopted the standard on January 1, 2023, and applied the standard’s provisions as a cumulative-effect adjustment to retained earnings as of January 1, 2023. Upon adoption of the standard, the Company recorded a million after-tax decrease to retained earnings as of January 1, 2023. The tax effect resulted in an increase to deferred tax assets. ​ In March 2022, the FASB issued ASU 2022-02, Financial Instruments-Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. The ASU eliminates the accounting guidance for loans modified as troubled debt restructurings by creditors while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Additionally, the ASU requires public business entities to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases. This ASU was effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, upon the Company’s adoption of the amendments in ASU 2016-13. The Company adopted the standard on January 1, 2023, and it did not have a material effect on the Company’s consolidated financial statements. ​ In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions to clarify that contractual sale restrictions should not be considered in the measurement of the fair value of an equity security. The Company owns stock in the Federal Reserve Bank (FRB) and in the Federal Home Loan Bank (FHLB) which is valued at historical cost which approximates fair value. Ownership of stock is a condition for services the Company receives from the FRB and FHLB. The stock is not publicly traded and can only be issued, exchanged, redeemed or repurchased by the FRB and the FHLB. ASU 2022-03 is effective for fiscal years beginning after December 15, 2023. The Company does not expect the adoption of this ASU to have a material effect on its consolidated financial statements.

Cash and Cash Equivalents

Cash and Cash Equivalents	9 Months Ended
	Sep. 30, 2023
Cash and Cash Equivalents
Cash and Cash Equivalents	(4) Cash and Cash Equivalents ​ The table below presents the balances of cash and cash equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, (Dollars in thousands) 2023 2022 Cash and due from banks ​ $ 9,479 ​ $ 9,722 ​ Interest-earning deposits in other banks ​ 79,643 ​ 30,831 ​ Cash and cash equivalents ​ $ 89,122 ​ $ 40,553 ​ ​ Interest-earning deposits in other banks consist primarily of deposits at the Federal Reserve Bank of San Francisco.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2023
Investment Securities
Investment Securities	(5) Investment Securities ​ The amortized cost, gross unrealized gains and losses, fair value, and related ACL of investment securities are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated ​ ​ (Dollars in thousands) Cost Gains Losses Fair Value ACL September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 22,898 ​ $ — $ (3,755) ​ $ 19,143 ​ $ — Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 695,641 ​ ​ — ​ (159,107) ​ ​ 536,534 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 718,539 ​ $ — $ (162,862) ​ $ 555,677 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 23,544 ​ $ — $ (2,723) ​ $ 20,821 ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 717,773 ​ ​ 62 ​ (126,751) ​ ​ 591,084 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 741,317 ​ $ 62 $ (129,474) ​ $ 611,905 ​ ​ ​ ​ The amortized cost and estimated fair value of investment securities by maturity date at September 30, 2023 are shown below. Incorporated in the maturity schedule are mortgage-backed securities, which are allocated using the contractual maturity as a basis. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized Estimated (Dollars in thousands) Cost Fair Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ Due after 10 years ​ $ 22,898 ​ $ 19,143 ​ Total ​ $ 22,898 ​ $ 19,143 ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ Due within 5 years ​ $ 9,302 ​ $ 8,156 ​ Due after 5 years through 10 years ​ 101,494 ​ 84,455 ​ Due after 10 years ​ 584,845 ​ 443,923 ​ Total ​ $ 695,641 ​ $ 536,534 ​ ​ The Company did not sell any held-to-maturity or available-for-sale securities during the nine months ended September 30, 2023 and 2022. ​ Investment securities with amortized costs of $562.7 million and $272.8 million at September 30, 2023 and December 31, 2022, respectively, were pledged to secure deposits made by state and local governments, securities sold under agreements to repurchase, transaction clearing accounts, and Federal Reserve Bank borrowings. Included in these amounts were $74.8 million and $5.4 million pledged to the Federal Reserve Bank’s discount window at September 30, 2023 and December 31, 2022, respectively, and $204.3 million pledged to the Federal Reserve Bank’s Bank Term Funding Program at September 30, 2023. While the Company pledged securities to the Federal Reserve Bank as a contingent funding source, the Company did not have any outstanding borrowings as of September 30, 2023 or December 31, 2022. ​ Provided below is a summary of investment securities which were in an unrealized loss position at September 30, 2023 and December 31, 2022. The Company does not intend to sell securities until such time as the value recovers or the securities mature and it is not more likely than not that the Company will be required to sell the securities prior to recovery of value or the securities mature. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months 12 Months or Longer Total Unrealized Unrealized Number of Unrealized Description of securities Fair Value Losses Fair Value Losses Securities Fair Value Losses (Dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ — ​ $ — ​ $ 19,143 ​ $ (3,755) 4 ​ $ 19,143 ​ $ (3,755) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 15,701 ​ ​ (820) ​ ​ 520,833 ​ ​ (158,287) 155 ​ ​ 536,534 ​ ​ (159,107) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 15,701 ​ $ (820) ​ $ 539,976 ​ $ (162,042) ​ 159 ​ $ 555,677 ​ $ (162,862) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government sponsored enterprises ​ $ 20,821 ​ $ (2,723) ​ $ — ​ $ — 4 ​ $ 20,821 ​ $ (2,723) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 210,128 ​ ​ (22,209) ​ ​ 377,418 ​ ​ (104,542) 148 ​ ​ 587,546 ​ ​ (126,751) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 230,949 ​ $ (24,932) ​ $ 377,418 ​ $ (104,542) ​ 152 ​ $ 608,367 ​ $ (129,474) ​ ​ Mortgage-Backed Securities. The unrealized losses on the Company’s investment in mortgage-backed securities were caused by increases in market interest rates subsequent to purchase. All of the mortgage-backed securities are guaranteed by Freddie Mac or Fannie Mae, which are U.S. government-sponsored enterprises, or Ginnie Mae, which is a U.S. government agency. Since the decline in market value is attributable to changes in interest rates and not credit quality, the Company does not intend to sell these investments until maturity, and it is not more likely than not that the Company will be required to sell such investments prior to recovery of its cost basis, the Company does not consider these investments to be impaired as of September 30, 2023 and December 31, 2022.

Loans Receivable and Allowance

Loans Receivable and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2023
Loans Receivable and Allowance for Credit Losses
Loans Receivable and Allowance for Credit Losses	(6) Loans Receivable and Allowance for Credit/Loan Losses ​ The components of loans receivable, net of allowance for credit losses (ACL) under ASC 326 as of September 30, 2023 and net of allowance for loan losses under ASC 310 as of December 31, 2022 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ ​ (Dollars in thousands) 2023 2022 ​ Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ First mortgages: ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential ​ $ 1,276,549 ​ $ 1,253,558 ​ ​ Multi-family residential ​ 5,985 ​ 6,448 ​ ​ Construction, commercial, and other ​ 15,185 ​ 23,903 ​ ​ Home equity loans and lines of credit ​ 7,002 ​ 6,426 ​ ​ Total real estate loans ​ 1,304,721 ​ 1,290,335 ​ ​ Other loans: ​ ​ ​ ​ ​ ​ ​ ​ Loans on deposit accounts ​ 270 ​ 216 ​ ​ Consumer and other loans ​ 8,369 ​ 8,381 ​ ​ Total other loans ​ ​ 8,639 ​ ​ 8,597 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 1,313,360 ​ 1,298,932 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net unearned fees and discounts ​ (1,939) ​ (2,136) ​ ​ Total loans, net of unearned fees and discounts ​ 1,311,421 ​ 1,296,796 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit/loan losses ​ (5,003) ​ (2,032) ​ ​ Loans receivable, net of allowance for credit/loan losses ​ $ 1,306,418 ​ $ 1,294,764 ​ ​ ​ The table below presents the activity in the allowance for credit losses by portfolio segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Commercial Consumer ​ ​ (Dollars in thousands) Estate Loans Loans ​ Unallocated Totals ​ Three months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,734 ​ $ 426 ​ $ 102 ​ $ — ​ $ 5,262 ​ (Reversal of provision) provision for credit losses ​ (291) ​ ​ 14 ​ ​ 18 ​ ​ — ​ (259) ​ ​ ​ 4,443 ​ 440 ​ 120 ​ — ​ 5,003 ​ Charge-offs ​ (5) ​ ​ — ​ ​ (22) ​ ​ — ​ (27) ​ Recoveries ​ 25 ​ ​ — ​ ​ 2 ​ ​ — ​ 27 ​ Net recoveries (charge-offs) ​ 20 ​ — ​ (20) ​ — ​ — ​ Balance, end of period ​ $ 4,463 ​ $ 440 ​ $ 100 ​ $ — ​ $ 5,003 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,263 ​ $ 434 ​ $ 76 ​ $ 259 ​ $ 2,032 ​ Adoption of ASU No. 2016-13 ​ ​ 3,393 ​ ​ 71 ​ ​ 4 ​ ​ (259) ​ ​ 3,209 ​ (Reversal of provision) provision for credit losses ​ (146) ​ ​ (65) ​ ​ 64 ​ ​ — ​ (147) ​ ​ ​ 4,510 ​ 440 ​ 144 ​ — ​ 5,094 ​ Charge-offs ​ (72) ​ — ​ (52) ​ — ​ (124) ​ Recoveries ​ 25 ​ — ​ 8 ​ — ​ 33 ​ Net charge-offs ​ (47) ​ — ​ (44) ​ — ​ (91) ​ Balance, end of period ​ $ 4,463 ​ $ 440 ​ $ 100 ​ $ — ​ $ 5,003 ​ ​ We recorded a reversal of credit loss provision of $259,000 under ASC 326 for the three months ended September 30, 2023 that was primarily due to a decrease in our real estate portfolio’s forecasted charge-offs that was partially offset by a decrease in its forecasted prepayments. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial, Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals Three months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,350 ​ $ 445 ​ $ 1 ​ $ 82 ​ $ 253 ​ $ 2,131 ​ (Reversal of provision) provision for loan losses ​ (87) ​ (3) ​ — ​ 1 ​ (20) ​ (109) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 83 ​ 233 ​ 2,022 ​ Charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Recoveries ​ — ​ — ​ — ​ — ​ — ​ — ​ Net charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,814 ​ $ 435 ​ $ 1 ​ $ 89 ​ $ 330 ​ $ 2,669 ​ (Reversal of provision) provision for loan losses ​ (551) ​ 7 ​ — ​ 38 ​ (97) ​ (603) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 127 ​ 233 ​ 2,066 ​ Charge-offs ​ — ​ — ​ — ​ (52) ​ — ​ (52) ​ Recoveries ​ — ​ — ​ — ​ 1 ​ — ​ 1 ​ Net charge-offs ​ — ​ — ​ — ​ (51) ​ — ​ (51) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ The table below presents the balance in the allowance for loan losses and the recorded investment in loans, net of unearned fees and discounts, by portfolio segment, and based on impairment method as of December 31, 2022, as determined in accordance with ASC 310 prior to the adoption of ASU 2016-13: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial, Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending allowance balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ Collectively evaluated for impairment ​ 1,263 ​ 434 ​ 1 ​ 75 ​ 259 ​ 2,032 ​ Total ending allowance balance ​ $ 1,263 ​ $ 434 ​ $ 1 ​ $ 75 ​ $ 259 ​ $ 2,032 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending loan balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 2,693 ​ $ — ​ $ 16 ​ $ — ​ $ 6 ​ $ 2,715 ​ Collectively evaluated for impairment ​ 1,255,300 ​ 23,775 ​ 6,411 ​ 8,595 ​ — ​ 1,294,081 ​ Total ending loan balance ​ $ 1,257,993 ​ $ 23,775 ​ $ 6,427 ​ $ 8,595 ​ $ 6 ​ $ 1,296,796 ​ ​ The table below presents the balance of impaired loans individually evaluated for impairment by class of loans as of December 31, 2022, in accordance with ASC 310 prior to the adoption of ASU 2016-13: ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid Recorded Principal (Dollars in thousands) Investment Balance December 31, 2022: ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,693 ​ $ 3,209 ​ Home equity loans and lines of credit ​ ​ 16 ​ ​ 30 ​ Consumer Loans ​ ​ 6 ​ 6 ​ Total ​ $ 2,715 ​ $ 3,245 ​ ​ The table below presents the average recorded investment and interest income recognized on impaired loans by class of loans as of September 30, 2022, in accordance with ASC 310 prior to the adoption of ASU 2016-13: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Three Months Ended For the Nine Months Ended September 30, 2022 September 30, 2022 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,431 ​ $ 6 ​ $ 2,465 ​ $ 18 ​ Home equity loans and lines of credit ​ ​ 17 ​ — ​ 18 ​ — ​ Total ​ $ 2,448 ​ $ 6 ​ $ 2,483 ​ $ 18 ​ ​ There were no loans individually evaluated for impairment with a related allowance for loan loss as of December 31, 2022. At December 31, 2022, loans individually evaluated for impairment do not have an allocated allowance for loan losses because they are written down to fair value at the time of impairment. At December 31, 2022, an impaired loan would also not have an allocated allowance if the value of the property securing the loan, less the cost to sell the property, is greater than the loan balance. ​ The Company primarily uses the aging of loans to monitor the credit quality of its loan portfolio. The table below presents by credit quality indicator, loan class and year of origination, the amortized cost basis of the Company’s loans as of September 30, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving Loans ​ ​ ​ ​ Amortized Cost of Term Loans by Origination Year ​ Amortized ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Cost Basis ​ Total September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 382 ​ ​ 368 ​ ​ 4,876 ​ ​ — ​ ​ 211 ​ ​ 1,056 ​ ​ 1,246 ​ ​ 8,139 Total Commercial ​ ​ 382 ​ ​ 368 ​ ​ 4,876 ​ ​ — ​ ​ 211 ​ ​ 1,056 ​ ​ 1,246 ​ ​ 8,139 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 60 - 89 days past due ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 115 ​ ​ 91 ​ ​ 24 ​ ​ 85 ​ ​ 19 ​ ​ 43 ​ ​ 6,211 ​ ​ 6,588 Total Consumer ​ ​ 117 ​ ​ 91 ​ ​ 24 ​ ​ 85 ​ ​ 19 ​ ​ 43 ​ ​ 6,211 ​ ​ 6,590 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 821 ​ ​ — ​ ​ 821 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 140 ​ ​ 138 ​ ​ — ​ ​ 278 Loans not past due ​ ​ 75,289 ​ ​ 130,283 ​ ​ 286,398 ​ ​ 185,292 ​ ​ 92,627 ​ ​ 525,704 ​ ​ — ​ ​ 1,295,593 Total Real Estate ​ ​ 75,289 ​ ​ 130,283 ​ ​ 286,398 ​ ​ 185,292 ​ ​ 92,767 ​ ​ 526,663 ​ ​ — ​ ​ 1,296,692 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 75,788 ​ $ 130,742 ​ $ 291,298 ​ $ 185,377 ​ $ 92,997 ​ $ 527,762 ​ $ 7,457 ​ $ 1,311,421 ​ The Company did not have any revolving loans that converted to term loans during the nine months ended September 30, 2023. ​ The following table presents by loan class and year of origination, the gross charge-offs recorded during the three and nine months ended September 30, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Total Three months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 1 ​ $ 4 ​ $ 5 Loans on deposit accounts ​ ​ 21 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 21 Consumer and other ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 Total ​ $ 22 ​ $ — ​ $ — ​ $ — ​ $ 1 ​ $ 4 ​ $ 27 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 11 ​ $ 61 ​ $ 72 Loans on deposit accounts ​ ​ 48 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 48 Consumer and other ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ — ​ ​ 4 Total ​ $ 49 ​ $ — ​ $ — ​ $ — ​ $ 14 ​ $ 61 ​ $ 124 ​ The table below presents the aging of loans and accrual status by class of loans, net of unearned fees and discounts. Loans with a formal loan payment deferral plan in place are not considered contractually past due or delinquent if the borrower is in compliance with the loan payment deferral plan. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans 90 Days or More 30 - 59 60 - 89 90 Days or Past Due Days Past Days Past More Total Past Loans Not Total Nonaccrual and Still (Dollars in thousands) Due Due Past Due Due Past Due Loans Loans Accruing September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 821 ​ $ — ​ $ 278 ​ $ 1,099 ​ $ 1,273,578 ​ $ 1,274,677 ​ $ 2,129 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,977 ​ 5,977 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 15,117 ​ 15,117 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,004 ​ 7,004 ​ 13 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 270 ​ 270 ​ — ​ — ​ Consumer and other ​ 1 ​ 1 ​ — ​ 2 ​ 8,374 ​ 8,376 ​ 172 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 822 ​ $ 1 ​ $ 278 ​ $ 1,101 ​ $ 1,310,320 ​ $ 1,311,421 ​ $ 2,314 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ 409 ​ $ 559 ​ $ 968 ​ $ 1,250,586 ​ $ 1,251,554 ​ $ 2,279 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 6,439 ​ 6,439 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 23,775 ​ 23,775 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 6,427 ​ 6,427 ​ 16 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 217 ​ 217 ​ — ​ — ​ Consumer and other ​ 6 ​ — ​ 6 ​ 12 ​ 8,372 ​ 8,384 ​ 6 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 6 ​ $ 409 ​ $ 565 ​ $ 980 ​ $ 1,295,816 ​ $ 1,296,796 ​ $ 2,301 ​ $ — ​ ​ ​ The table below presents the amortized cost basis of loans on nonaccrual status as of September 30, 2023 and December 31, 2022. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 December 31, 2022 (Dollars in thousands) Nonaccrual Loans With a Related ACL Nonaccrual Loans Without a Related ACL Total Nonaccrual Loans Total Nonaccrual Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 1,051 ​ $ 1,078 ​ $ 2,129 ​ $ 2,279 Home equity loans and lines of credit ​ ​ 13 ​ ​ — ​ ​ 13 ​ ​ 16 Consumer and other ​ ​ 172 ​ ​ — ​ ​ 172 ​ ​ 6 Total Nonaccrual Loans and Leases ​ $ 1,236 ​ $ 1,078 ​ $ 2,314 ​ $ 2,301 ​ All payments received while on nonaccrual status are applied against the principal balance of the loan. ​ When a mortgage loan becomes seriously delinquent ( 90 days or more contractually past due), it displays weaknesses that may result in a loss. As a loan becomes more delinquent, the likelihood of the borrower repaying the loan decreases and the loan becomes more collateral dependent. A mortgage loan becomes collateral dependent when the proceeds for repayment can be expected to come only from the sale or operation of the collateral and not from borrower repayments. Generally, appraisals are obtained after a loan becomes collateral dependent or is four months delinquent. The carrying value of collateral-dependent loans is adjusted to the fair value of the collateral less selling costs. Any commercial real estate, commercial, construction or equity loan that has a loan balance in excess of a specified amount is also periodically reviewed to determine whether the loan exhibits any weaknesses and is performing in accordance with its contractual terms. The amortized cost basis of collateral-dependent loans, excluding accrued interest receivable, was $279,000 and $559,000 at September 30, 2023 and December 31, 2022, respectively. These loans were collateralized by residential real estate in Hawaii. As of September 30, 2023 and December 31, 2022, the fair value of the collateral less selling costs of these collateral-dependent loans exceeded the amortized cost basis. There was no ACL on collateral-dependent loans. ​ In August 2023, wildfires on Maui partially or completely destroyed 11 homes which were collateral for $3.1 million of mortgage loans held by the Company. In September, a mortgage loan on one of the homes was paid off. At September 30, 2023, the Company had million of mortgage loans which were collateralized by homes partially or completely destroyed in the Maui wildfires and all of these loans were current. All of the homes which were destroyed are insured and the Company does not expect to incur a loss on these loans. The Company also has million of mortgage loans on Maui at September 30, 2023 which were not affected by the wildfires. As of September 30, 2023, all of these loans were current. ​ There were no loans modified during the nine months ended September 30, 2023 or 2022. ​ Since the beginning of the year, there has not been a significant increase in loan delinquencies, significant changes in deposits or significant drawdowns on any lines of credit. We do not have any commercial loans to hotels, businesses in the transportation industry, restaurants, or retail establishments. ​ The Company had no real estate owned as of September 30, 2023 or December 31, 2022. There were in the process of foreclosure at September 30, 2023. There were ​ Nearly all of our real estate loans are collateralized by real estate located in the State of Hawaii. Loan-to-value ratios on these real estate loans generally do not exceed ​ During the nine months ended September 30, 2023 and 2022, the Company sold mortgage loans held for sale with principal balances of $827,000 and $5.4 million, respectively, and recognized a gain of $10,000 and a loss of $3,000 , respectively. The Company had ​ The Company serviced loans for others with principal balances of $34.1 million at September 30, 2023 and $36.0 million at December 31, 2022. Of these amounts, million of loan balances relate to securitizations for which the Company continues to hold the related mortgage-backed securities at September 30, 2023 and December 31, 2022, respectively. The amount of contractually specified servicing fees earned for the nine months ended September 30, 2023 and 2022 was , respectively. The amount of contractually specified servicing fees earned for the three months ended September 30, 2023 and 2022 was , respectively. The fees are reported in service and other fees in the Consolidated Statements of Income. ​

Advances from the Federal Home

Advances from the Federal Home Loan Bank	9 Months Ended
	Sep. 30, 2023
Advances from the Federal Home Loan Bank
Advances from the Federal Home Loan Bank	(7) Advances from the Federal Home Loan Bank ​ Federal Home Loan Bank advances are secured by a blanket pledge on the Bank’s assets not otherwise pledged. At September 30, 2023 and December 31, 2022, our credit limit with the FHLB of Des Moines was equal to 45% of Territorial Savings Bank’s total assets and we had the capacity to borrow an additional $593.9 million and $769.1 million, respectively. ​ Advances outstanding consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ December 31, 2022 Weighted ​ Weighted Average ​ Average (Dollars in thousands) Amount Rate Amount Rate Due within one year ​ $ 79,000 1.48 % ​ $ 24,000 1.27 % Due over 1 year to 2 years ​ 52,000 1.99 ​ ​ 82,000 1.40 ​ Due over 2 years to 3 years ​ 30,000 3.64 ​ ​ 25,000 1.58 ​ Due over 3 years to 4 years ​ ​ 30,000 ​ 4.24 ​ ​ ​ 10,000 ​ 1.97 ​ Due over 4 years to 5 years ​ ​ 60,000 ​ 4.32 ​ ​ ​ — ​ — ​ Due over 5 years to 6 years ​ 5,000 4.38 ​ ​ — — ​ Total ​ $ 256,000 2.88 % ​ $ 141,000 1.45 % ​

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Sep. 30, 2023
Securities Sold Under Agreements to Repurchase
Securities Sold Under Agreements to Repurchase	​ (8) Securities Sold Under Agreements to Repurchase ​ Securities sold under agreements to repurchase are treated as financings and the obligations to repurchase the identical securities sold are reflected as a liability with the securities collateralizing the agreements classified as an asset. Securities sold under agreements to repurchase are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ December 31, 2022 Weighted ​ Weighted Repurchase Average ​ Repurchase Average (Dollars in thousands) Liability Rate Liability Rate Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Over 1 year to 2 years ​ $ 10,000 1.81 % ​ $ 5,000 1.88 % Over 2 years to 3 years ​ — — ​ ​ ​ 5,000 1.73 ​ Total ​ $ 10,000 1.81 % ​ $ 10,000 1.81 % ​ Below is a summary comparing the carrying value and fair value of securities pledged to secure repurchase agreements, the repurchase liability, and the amount at risk at September 30, 2023. The amount at risk is the greater of the carrying value or fair value over the repurchase liability and refers to the potential loss to the Company if the secured lender fails to return the security at the maturity date of the agreement. All the agreements to repurchase are with JP Morgan Securities and the securities pledged are mortgage-backed securities issued and guaranteed by U.S. government agencies or U.S. government-sponsored enterprises. The fair value of the securities pledged must exceed the repurchase liability by 5.00%. In the event of a decline in the fair value of securities pledged to less than the required amount due to market conditions or principal repayments, the Company is obligated to pledge additional securities or other suitable collateral to cure the deficiency. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Carrying Fair Average Value of Value of Repurchase Amount Months to (Dollars in thousands) Securities Securities Liability at Risk Maturity Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Over 90 days ​ $ 13,329 ​ $ 10,655 ​ $ 10,000 ​ $ 3,329 15 ​ ​

Offsetting of Financial Liabili

Offsetting of Financial Liabilities	9 Months Ended
	Sep. 30, 2023
Offsetting of Financial Liabilities
Offsetting of Financial Liabilities	(9) Offsetting of Financial Liabilities ​ Securities sold under agreements to repurchase are subject to a right of offset in the event of default. See Note 8, Securities Sold Under Agreements to Repurchase, for additional information. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Amount of Gross Amount Not Offset in the Gross Amount Gross Amount Liabilities Balance Sheet of Recognized Offset in the Presented in the Financial Cash Collateral (Dollars in thousands) Liabilities Balance Sheet Balance Sheet Instruments ​ Pledged Net Amount September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​

Employee Stock Ownership Plan

Employee Stock Ownership Plan	9 Months Ended
	Sep. 30, 2023
Employee Stock Ownership Plan
Employee Stock Ownership Plan
Employee Stock Ownership Plan	(10) Employee Stock Ownership Plan ​ Effective January 1, 2009, Territorial Savings Bank adopted an Employee Stock Ownership Plan (ESOP) for eligible employees. The ESOP borrowed , of the total number of shares issued by the Company in its initial public offering. The shares were acquired at a price of ​ The loan is secured by the shares purchased with the loan proceeds and will be repaid by the ESOP over the 20-year term of the loan with funds from Territorial Savings Bank’s contributions to the ESOP and dividends payable on the shares. The interest rate on the ESOP loan is an adjustable rate equal to the prime rate, as published in The Wall Street Journal . The interest rate adjusts annually and will be the prime rate on the first business day of the calendar year. ​ Shares purchased by the ESOP are held by a trustee in an unallocated suspense account, and shares are released annually from the suspense account on a pro-rata basis as principal and interest payments are made by the ESOP to the Company. The trustee allocates the shares released among participants on the basis of each participant’s proportional share of compensation relative to all participants. As shares are committed to be released from the suspense account, Territorial Savings Bank reports compensation expense based on the average fair value of shares released with a corresponding credit to stockholders’ equity. The shares committed to be released are considered outstanding for earnings per share computations. Compensation expense recognized for the three months ended September 30, 2023 and 2022 amounted to , respectively. Compensation expense recognized for the nine months ended September 30, 2023 and 2022 amounted to ​ Shares held by the ESOP trust were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, 2023 2022 Allocated shares ​ 607,705 ​ 583,474 ​ ​ Unearned shares ​ 256,898 ​ 293,598 ​ ​ Total ESOP shares ​ 864,603 ​ 877,072 ​ ​ Fair value of unearned shares, in thousands ​ $ 2,335 ​ $ 7,049 ​ ​ ​ The ESOP restoration plan is a nonqualified plan that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the ESOP’s benefit formula. The supplemental cash payments consist of payments representing shares that cannot be allocated to the participants under the ESOP due to IRS limitations imposed on tax-qualified plans. We accrue for these benefits over the period during which employees provide services to earn these benefits. For the three and nine months ended September 30, 2023, we accrued ​

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2023
2010 Equity Incentive Plan
Share-Based Compensation
Share-Based Compensation	(11) Share-Based Compensation ​ The shareholders of Territorial Bancorp Inc. adopted the 2010 Equity Incentive Plan and the 2019 Equity Incentive Plan. These plans provide for the award of stock options and restricted stock to key officers and directors. In accordance with the Compensation – Stock Compensation topic of the FASB ASC, the cost of the equity incentive plans is based on the fair value of the awards on the grant date. The fair value of time-based restricted stock is based on the closing price of the Company’s stock on the grant date. The fair value of performance-based stock that will vest based on a performance condition is based on the closing price of the Company’s stock on the date of grant. The fair value of performance-based restricted stock that will vest on a market condition is based on a Monte Carlo valuation of the Company’s stock on the date of grant. The cost of the awards will be recognized on a straight-line basis over the three -year vesting period during which participants are required to provide services in exchange for the awards. There are 42,680 remaining shares available for new awards under the 2019 Equity Plan. ​ The Company recognized compensation expense, measured as the fair value of the share-based award on the date of grant, on a straight-line basis over the vesting period. Share-based compensation is recorded in the Consolidated Statements of Income as a component of salaries and employee benefits with a corresponding increase in stockholders’ equity. The table below presents information on compensation expense and the related tax benefit for all share-based awards: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands) 2023 2022 2023 2022 Compensation expense ​ $ 88 ​ $ (18) ​ $ 90 ​ $ 256 ​ Income tax benefit ​ 24 ​ (5) ​ 24 ​ 70 ​ ​ Restricted Stock ​ Restricted stock awards are accounted for as fixed grants using the fair value of the Company’s stock at the time of grant. Unvested restricted stock may not be disposed of or transferred during the vesting period. Restricted stock carries the right to receive dividends, although dividends attributable to restricted stock are retained by the Company until the shares vest, at which time they are paid to the award recipient. Unvested restricted stock that is time-based contain nonforfeitable dividend rights. Accrued dividends on restricted stock that do not vest based on performance or market conditions are forfeited. ​ The table below presents the time-based restricted stock activity: ​ ​ ​ ​ ​ ​ ​ ​ Weighted Time-Based Average Grant Restricted Date Fair Stock Value Unvested at December 31, 2022 23,664 ​ $ 24.15 ​ Granted 14,803 ​ 19.29 ​ Vested 12,729 ​ 23.64 ​ Forfeited — ​ — ​ Unvested at September 30, 2023 25,738 ​ $ 21.61 ​ ​ ​ ​ ​ ​ ​ ​ Unvested at December 31, 2021 23,208 ​ $ 24.61 ​ Granted 12,013 ​ 23.77 ​ Vested 11,557 ​ 24.68 ​ Forfeited — ​ — ​ Unvested at September 30, 2022 23,664 ​ $ 24.15 ​ ​ As of September 30, 2023, the Company had $431,000 of unrecognized compensation costs related to time-based restricted stock. ​ The table below presents the performance-based restricted stock units (PRSUs) that will vest on a performance condition: ​ ​ ​ ​ ​ ​ ​ Performance- ​ ​ ​ ​ Based Restricted ​ ​ ​ Stock Units Weighted ​ ​ Based on a ​ Average Grant ​ ​ Performance ​ Date Fair Condition Value Unvested at December 31, 2022 43,557 ​ $ 23.63 Granted 17,758 ​ 19.29 Vested — ​ — Forfeited 16,348 ​ 21.05 Unvested at September 30, 2023 44,967 ​ $ 22.85 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2021 41,583 ​ $ 24.68 Granted 14,412 ​ 23.77 Vested 7,670 ​ 27.30 Forfeited 4,768 ​ 27.30 Unvested at September 30, 2022 43,557 ​ $ 23.63 ​ The fair value of these PRSUs is based on the fair value of the Company’s stock on the date of grant. As of September 30, 2023, the Company had no unrecognized compensation costs related to these PRSUs since meeting the performance condition is not probable. Compensation expense up to $685,000 may be recognized in the future if achievement of the performance condition becomes probable. Performance will be measured over a three-year performance period and will be cliff vested. The performance condition is measured quarterly by comparing the Company’s three-year return on average equity to a peer group of banks. The Company’s percentile ranking in the peer group is used to adjust the number of PRSUs that are expected to vest. ​ The table below presents the PRSUs that will vest on a market condition: ​ ​ ​ ​ ​ ​ ​ ​ ​ Performance- ​ ​ ​ ​ ​ Based Restricted ​ Monte Carlo ​ ​ Stock Units ​ Valuation of ​ ​ Based on a ​ the Company's Market Condition Stock Unvested at December 31, 2022 10,889 ​ $ 24.04 Granted 4,443 ​ ​ 17.95 Vested — ​ — Forfeited 4,087 ​ 22.16 Unvested at September 30, 2023 11,245 ​ $ 22.31 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2021 10,396 ​ $ 24.03 Granted 3,603 ​ ​ 24.42 Vested — ​ — Forfeited 3,110 ​ 24.45 Unvested at September 30, 2022 10,889 ​ $ 24.04 ​ As of September 30, 2023, the Company had $75,000 of unrecognized compensation costs related to the PRSUs that are based on a market condition. The market value of PRSUs that will vest on a market condition is determined by a Monte Carlo valuation of the Company’s stock as of the grant date. Performance will be measured over a three-year performance period and will be cliff vested. The market condition is measured quarterly by comparing the Company’s three-year average total stock return to a peer group of other banks. The Company’s percentile ranking in the peer group determines how many PRSUs will vest.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2023
Earnings Per Share
Earnings Per Share	(12) Earnings Per Share ​ Holders of unvested restricted stock accrue dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Unvested restricted stock awards that are time-based contain nonforfeitable rights to dividends or dividend equivalents and are considered to be participating securities in the earnings per share computation using the two-class method. Under the two-class method, earnings are allocated to common shareholders and participating securities according to their respective rights to earnings. Unvested restricted stock awards that vest based on performance or market conditions are not considered to be participating securities in the earnings per share calculation because accrued dividends on shares that do not vest are forfeited. ​ The table below presents the information used to compute basic and diluted earnings per share: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands, except per share data) 2023 2022 2023 2022 Net income ​ $ 880 ​ $ 3,891 ​ $ 4,693 ​ $ 12,711 ​ Income allocated to participating securities ​ ​ (15) ​ ​ (23) ​ ​ (44) ​ ​ (70) ​ Net income available to common shareholders ​ $ 865 ​ $ 3,868 ​ $ 4,649 ​ $ 12,641 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average number of shares used in: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per share ​ 8,577,632 ​ 8,802,010 ​ 8,656,915 ​ 8,885,626 ​ Dilutive common stock equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options and restricted stock units ​ 32,657 ​ 44,601 ​ 48,869 ​ 53,182 ​ Diluted earnings per share ​ 8,610,289 ​ 8,846,611 ​ 8,705,784 ​ 8,938,808 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income per common share, basic ​ $ 0.10 ​ $ 0.44 ​ $ 0.54 ​ $ 1.42 ​ Net income per common share, diluted ​ $ 0.10 ​ $ 0.44 ​ $ 0.53 ​ $ 1.41 ​ ​

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2023
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss	(13) Accumulated Other Comprehensive Loss ​ The table below presents the changes in the components of accumulated other comprehensive loss, net of taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unfunded Unrealized Pension Loss/(Gain) on (Dollars in thousands) Liability Securities Total Three months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,975 ​ $ 7,721 ​ Other comprehensive loss, net of taxes ​ ​ — ​ 780 ​ 780 ​ Net current period other comprehensive loss ​ — ​ 780 ​ 780 ​ Balances at end of period ​ $ 5,746 ​ $ 2,755 ​ $ 8,501 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ 877 ​ $ 6,401 ​ Other comprehensive loss, net of taxes ​ — ​ 1,114 ​ 1,114 ​ Net current period other comprehensive loss ​ — ​ 1,114 ​ 1,114 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,998 ​ $ 7,744 ​ Other comprehensive loss, net of taxes ​ — ​ 757 ​ 757 ​ Net current period other comprehensive loss ​ — ​ 757 ​ 757 ​ Balances at end of period ​ $ 5,746 ​ $ 2,755 ​ $ 8,501 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ — ​ $ 5,524 ​ Other comprehensive loss, net of taxes ​ ​ — ​ ​ 1,991 ​ ​ 1,991 ​ Net current period other comprehensive loss ​ — ​ 1,991 ​ 1,991 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​ ​ The table below presents the tax effect on each component of accumulated other comprehensive loss: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2023 2022 Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 1,063 ​ $ (283) ​ $ 780 ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ Total ​ $ 1,063 ​ $ (283) ​ $ 780 ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended September 30, ​ 2023 2022 ​ Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 1,032 ​ $ (275) ​ $ 757 ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ Total ​ $ 1,032 ​ $ (275) ​ $ 757 ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ ​ ​

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2023
Revenue Recognition
Revenue Recognition	(14) Revenue Recognition ​ The Company’s contracts with customers are generally short term in nature, with cycles of one year or less. These can range from an immediate term for services such as wire transfers, foreign currency exchanges, and cashier’s check purchases, to several days for services such as processing annuity and mutual fund sales. Some contracts may be of an ongoing nature, such as providing deposit account services, including ATM access, check processing, account analysis, and check ordering. However, provision of an assessable service and payment for such service is usually concurrent or closely timed. Contracts related to financial instruments, such as loans, investments, and debt, are excluded from the scope of this reporting requirement. ​ After analyzing the Company’s revenue sources, including the amount of revenue received, the timing of services rendered, and the timing of payment for these services, the Company has determined that the rendering of services and the payment for such services are generally closely matched. Any differences are not material to the Company’s Consolidated Financial Statements. Accordingly, the Company generally records income when payment for services is received. ​ Revenue from contracts with customers is reported in service and other fees in other noninterest income in the Consolidated Statements of Income. The table below reconciles the revenue from contracts with customers and other revenue reported in those line items: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Service and ​ ​ ​ ​ (Dollars in thousands) Other Fees Other Total Three months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 265 ​ $ 16 ​ $ 281 Other revenue ​ ​ 33 ​ ​ 57 ​ ​ 90 Total ​ $ 298 ​ $ 73 ​ $ 371 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 304 ​ $ 38 ​ $ 342 Other revenue ​ ​ 35 ​ ​ 38 ​ ​ 73 Total ​ $ 339 ​ $ 76 ​ $ 415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 917 ​ $ 85 ​ $ 1,002 Other revenue ​ ​ 105 ​ ​ 123 ​ ​ 228 Total ​ $ 1,022 ​ $ 208 ​ $ 1,230 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 989 ​ $ 138 ​ $ 1,127 Other revenue ​ ​ 103 ​ ​ 1,221 ​ ​ 1,324 Total ​ $ 1,092 ​ $ 1,359 ​ $ 2,451 ​

Leases

Leases	9 Months Ended
	Sep. 30, 2023
Leases
Leases	​ (15) Leases ​ The table below presents lease costs and other information for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ September 30, September 30, (Dollars in thousands) 2023 2022 2023 2022 Lease costs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease costs ​ $ 689 ​ $ 712 ​ $ 2,084 ​ $ 2,211 ​ Short-term lease costs ​ 160 ​ 107 ​ 375 ​ 199 ​ Variable lease costs ​ 45 ​ 49 ​ 122 ​ 127 ​ Total lease costs ​ $ 894 ​ $ 868 ​ $ 2,581 ​ $ 2,537 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash paid for amounts included in measurement of lease liabilities ​ $ (1,901) ​ $ 854 ​ $ (1,271) ​ $ 2,381 ​ ROU assets obtained in exchange for new operating lease liabilities ​ $ 84 ​ $ 2,003 ​ $ 590 ​ $ 6,833 ​ ​ Future minimum rental commitments under noncancellable operating leases are as follows: ​ ​ ​ ​ ​ ​ ​ September 30, (Dollars in thousands) 2023 2023 ​ $ 725 2024 ​ 2,818 2025 ​ 2,199 2026 ​ 2,038 2027 ​ 1,961 Thereafter ​ 11,028 Total ​ ​ 20,769 ​ ​ ​ ​ Less lease incentives to be received in 2023 ​ ​ (1,273) Less present value discount ​ ​ (2,111) Present value of leases ​ $ 17,385 ​ The table below presents additional lease-related information: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ ​ September 30, ​ ​ ​ 2023 ​ 2022 ​ Weighted-average remaining lease term (years) ​ 9.72 ​ ​ 9.03 ​ ​ Weighted-average discount rate ​ ​ 2.14 % ​ ​ 2.04 % ​ ​

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2023
Fair Value
Fair Value	(16) Fair Value ​ In accordance with the Fair Value Measurements and Disclosures topic of the FASB ASC, the Company groups its financial assets and liabilities measured or disclosed at fair value into three levels based on the markets in which the financial assets and liabilities are traded and the reliability of the assumptions used to determine fair value as follows: ​ ● Level 1 — Valuation is based upon quoted prices (unadjusted) for identical assets or liabilities traded in active markets. A quoted price in an active market provides the most reliable evidence of fair value and shall be used to measure fair value whenever available. ​ ● Level 2 — Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. ​ ● Level 3 — Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect management’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of discounted cash flow models and similar techniques that require the use of significant judgment or estimation. ​ In accordance with the Fair Value Measurements and Disclosures topic, the Company bases its fair values on the price that it would expect to receive if an asset were sold or the price that it would expect to pay to transfer a liability in an orderly transaction between market participants at the measurement date. Also as required, the Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when developing fair value measurements. ​ The Company uses fair value measurements to determine fair value disclosures. Investment securities available for sale and derivatives are recorded at fair value on a recurring basis. From time to time, the Company may be required to record other financial assets at fair value on a nonrecurring basis, such as loans held for sale, individually evaluated loans and investments, and mortgage servicing assets. These nonrecurring fair value adjustments typically involve application of the lower of cost or fair value accounting or write-downs of individual assets. ​ Investment Securities Available for Sale. ​ Interest Rate Contracts. The Company may enter into interest rate lock commitments with borrowers on loans intended to be sold. To manage interest rate risk on the lock commitments, the Company may also enter into forward loan sale commitments. The interest rate lock commitments and forward loan sale commitments are treated as derivatives and are recorded at their fair value determined by referring to prices quoted in the secondary market for similar contracts. The fair value inputs are considered Level 2 inputs. Interest rate contracts that are classified as assets are included with prepaid expenses and other assets on the Consolidated Balance Sheet while interest rate contracts that are classified as liabilities are included with accounts payable and accrued expenses. ​ The estimated fair values of the Company’s financial instruments are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ ​ ​ ​ Fair Value Measurements Using (Dollars in thousands) Amount Fair Value Level 1 Level 2 Level 3 September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 89,112 ​ $ 89,112 ​ $ 89,112 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 19,143 ​ ​ 19,143 ​ ​ — ​ ​ 19,143 ​ ​ — ​ Investment securities held to maturity ​ 695,641 ​ ​ 536,534 ​ ​ — ​ ​ 536,534 ​ ​ — ​ Loans receivable, net ​ 1,306,418 ​ ​ 1,037,090 ​ ​ — ​ ​ — ​ ​ 1,037,090 ​ FHLB stock ​ 12,844 ​ ​ 12,844 ​ ​ — ​ ​ 12,844 ​ ​ — ​ FRB stock ​ ​ 3,177 ​ ​ 3,177 ​ ​ — ​ ​ 3,177 ​ ​ — ​ Accrued interest receivable ​ 6,131 ​ ​ 6,131 ​ ​ 110 ​ ​ 1,509 ​ ​ 4,512 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,651,013 ​ ​ 1,645,726 ​ ​ — ​ ​ 1,124,546 ​ ​ 521,180 ​ Advances from the Federal Home Loan Bank ​ 256,000 ​ ​ 247,722 ​ ​ — ​ ​ 247,722 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,568 ​ ​ — ​ ​ 9,568 ​ ​ — ​ Accrued interest payable ​ 1,476 ​ ​ 1,476 ​ ​ — ​ ​ 41 ​ ​ 1,435 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 40,553 ​ $ 40,553 ​ $ 40,553 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 20,821 ​ ​ 20,821 ​ ​ — ​ ​ 20,821 ​ ​ — ​ Investment securities held to maturity ​ 717,773 ​ ​ 591,084 ​ ​ — ​ ​ 591,084 ​ ​ — ​ Loans receivable, net ​ 1,294,764 ​ ​ 1,180,840 ​ ​ — ​ ​ — ​ ​ 1,180,840 ​ FHLB stock ​ 8,197 ​ ​ 8,197 ​ ​ — ​ ​ 8,197 ​ ​ — ​ FRB stock ​ ​ 3,170 ​ ​ 3,170 ​ ​ — ​ ​ 3,170 ​ ​ — ​ Accrued interest receivable ​ 6,115 ​ ​ 6,115 ​ ​ 23 ​ ​ 1,497 ​ ​ 4,595 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,716,152 ​ ​ 1,708,612 ​ ​ — ​ ​ 1,286,465 ​ ​ 422,147 ​ Advances from the Federal Home Loan Bank ​ 141,000 ​ ​ 133,145 ​ ​ — ​ ​ 133,145 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,440 ​ ​ — ​ ​ 9,440 ​ ​ — ​ Accrued interest payable ​ 701 ​ ​ 701 ​ ​ — ​ ​ 33 ​ ​ 668 ​ ​ At September 30, 2023 and December 31, 2022, neither the commitment fees received on commitments to extend credit nor the fair value thereof was material to the Consolidated Financial Statements of the Company. The table below presents the balance of assets and liabilities measured at fair value on a recurring basis: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Level 1 Level 2 Level 3 Total September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 19,143 ​ $ — ​ $ 19,143 ​ Interest rate contracts ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ — ​ 20,821 ​ — ​ 20,821 ​ Interest rate contracts ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ There were no assets or liabilities measured at fair value on a nonrecurring basis as of September 30, 2023 or December 31, 2022.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2023
Subsequent Events
Subsequent Events	(17) Subsequent Events ​ On October 27, 2023, the Board of Directors of Territorial Bancorp Inc. declared a quarterly cash dividend of $0.05 per share of common stock. The dividend is expected to be paid on November 24, 2023 to stockholders of record as of November 9, 2023.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended	9 Months Ended
	Jun. 30, 2023	Sep. 30, 2023
Summary of Significant Accounting Policies
Basis of Presentation	(a) Basis of Presentation ​ The accompanying unaudited interim condensed consolidated financial statements of Territorial Bancorp Inc. have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited interim condensed consolidated financial statements and notes should be read in conjunction with the Company’s consolidated financial statements and notes thereto filed as part of the Annual Report on Form 10-K for the year ended December 31, 2022. In the opinion of management, all adjustments necessary for a fair presentation have been made and consist only of normal recurring adjustments. Interim results of operations are not necessarily indicative of results to be expected for the year. ​
Allowance of Loan Losses Policy	(b) Allowance of Credit Losses (ACL) on Loans and Securities ​ The current expected credit losses (CECL) accounting standard requires an estimate of the credit losses expected over the life of the financial instrument. CECL replaces the incurred loss approach that delayed the recognition of a credit loss until it was probable that a loss event occurred. The ACL is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the ACL during the period when management deems the loan to be uncollectible and all interest previously accrued but not collected is reversed against the current period ACL. ​ The estimate of expected credit losses is based on information about past events, current conditions, and reasonable and supportable forecasts that affect the collectability of financial instruments. Historical loss experience is generally the starting point for estimating expected credit losses. The Company considers whether the historical loss experience should be adjusted for asset specific risk characteristics or current conditions at the reporting date that did not exist over the historical reporting period. These qualitative adjustments can include changes in the economy, loan underwriting standards, and delinquency trends. The Company then considers future economic conditions as part of the one year reasonable and supportable forecast period. ​ The Bank’s loan portfolio is segmented into three pools: real estate, commercial and consumer loans. Only three pools are used to segment the Bank’s loan portfolio because loans within the pools share similar risk characteristics and were originated using similar underwriting standards. Loans that do not share similar risk characteristics would be evaluated on an individual basis and excluded from the collective evaluation. Collateral dependent loans are not considered to share the same risk characteristics. A loan is considered to be collateral dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the sale or operation of the collateral. For loans which are considered to be collateral dependent, the Company has elected to estimate the expected credit loss based on the fair value of the collateral less selling costs. If the fair value of the collateral less selling costs is less than the loan’s amortized cost basis, the Company records a partial charge-off to reduce the loan’s amortized cost basis for the difference between the collateral fair value less selling costs and the amortized cost basis. ​ The real estate pool consists primarily of residential and commercial mortgage loans secured by real estate in Hawaii, with fixed interest rates, loan terms of up to 30 years, and were originated using similar loan terms. The consumer loan pool consists primarily of home equity lines of credit secured by real estate in Hawaii, personal loans, and unsecured personal lines of credit. The primary credit risk characteristics inherent in the residential mortgage loan and consumer loan portfolios are a decline in economic conditions, such as elevated levels of unemployment, and declines in Hawaii residential real estate values. The commercial loan pool consists of business loans. Although the commercial loan portfolio is subject to the same risk of declines in economic conditions, the primary risk characteristics inherent in this portfolio include the ability of the borrower to sustain cash flows from business operations, the ability to control operational expenses to satisfy contractual debt payments, and the ability to utilize personal or business resources to pay their contractual debt payments if the operational cash flows are not sufficient. ​ The ACL on loans and accrued interest is calculated on a loan by loan basis. If the loan’s amortized cost basis is less than the total present value of cash flows calculated using a discounted cash flow approach, the ACL is equal to the amortized cost basis minus the total present value of cash flows on the loan discounted by the loan’s effective interest rate. The expected cash flows include estimates of loan charge-offs, recoveries, and prepayments. The expected cash flows on the loans are adjusted using forecasts of economic variables which have a strong correlation with loan charge-offs, recoveries, and prepayments during the one year reasonable and supportable forecast period. After the reasonable and supportable forecast period, the historical reversion rate is used to calculate loan charge-offs, recoveries, and prepayments for the remaining expected life of the loan. The reversion rate is based on historical averages and applied on a straight-line basis. Qualitative adjustments may be made to account for current conditions and forward looking events not captured in the quantitative calculation. ​ Loans receivable are stated at amortized cost which includes the principal amount outstanding, less the allowance for credit/loan losses, deferred loan origination fees and costs, commitment fees, and cumulative net charge-offs. Interest income on loans receivable is accrued as earned. million as of September 30, 2023, and is included in accrued interest receivable on the Consolidated Balance Sheet. ​ The Company determines delinquency status by considering the number of days full payments required by the contractual terms of the loan are past due. The Company has a policy of placing loans on a nonaccrual basis when 90 days or more contractually delinquent or when, in the opinion of management, collection of all or part of the principal balance appears doubtful, unless the loans are well secured and in the process of collection. When a loan is placed on nonaccrual status, all interest previously accrued and not collected is reversed against current period provision for credit losses. For nonaccrual loans, the Company records payments received as a reduction in principal. A nonaccrual loan may be restored to an accrual basis when principal and interest payments are current and full payment of principal and interest is expected. ​ The Company’s off-balance sheet credit exposures are comprised of unfunded portions of existing loans, such as lines of credit and construction loans, and commitments to originate loans that are not conditionally cancellable by the Company. Changes to the reserve for off-balance sheet credit exposures are recorded through increases or decreases to the provision for credit losses on the Consolidated Statements of Income. There were no reserves for off-balance sheet credit exposures at September 30, 2023 or December 31, 2022. ​ While management utilizes its best judgment and information available, the adequacy of the ACL and the reserve for off-balance sheet credit exposures is determined by certain factors outside of the Company's control, such as the performance of our portfolios, changes in the economic environment including economic uncertainty, changes in interest rates and loan prepayments, and the view of the regulatory authorities toward classification of assets and the level of ACL and the reserve for off-balance sheet credit exposures. Additionally, the level of ACL and the reserve for off-balance sheet credit exposures may fluctuate based on the balance and mix of the loan portfolio, changes in loan prepayments and off-balance sheet credit exposures, changes in charge-off rates, and changes in forecasted economic conditions. If actual results differ significantly from our assumptions, our ACL and the reserve for off-balance sheet credit exposures may not be sufficient to cover inherent losses in our loan portfolio, resulting in additions to our ACL and an increase in the provision for credit losses. ​
Recently Issued Accounting Pronouncements		​ In June 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The ASU changes the threshold for recognizing losses from a “probable” to an “expected” model. The new model is referred to as the current expected credit loss model and applies to loans, leases, held-to-maturity investments, loan commitments, and financial guarantees. The standard requires the measurement of all expected credit losses for financial assets as of the reporting date (including historical experience, current conditions, and reasonable and supportable forecasts) and enhanced disclosures that will help financial statement users understand the estimates and judgments used in estimating credit losses and evaluating the credit quality of an organization’s portfolio. The amendment was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. In November 2019, the FASB issued an update that delayed the effective date of the amendment for smaller reporting companies, as defined by the Securities and Exchange Commission, to fiscal years beginning after December 15, 2022. The Company is a smaller reporting company. The Company adopted the standard on January 1, 2023, and applied the standard’s provisions as a cumulative-effect adjustment to retained earnings as of January 1, 2023. Upon adoption of the standard, the Company recorded a million after-tax decrease to retained earnings as of January 1, 2023. The tax effect resulted in an increase to deferred tax assets. ​ In March 2022, the FASB issued ASU 2022-02, Financial Instruments-Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. The ASU eliminates the accounting guidance for loans modified as troubled debt restructurings by creditors while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Additionally, the ASU requires public business entities to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases. This ASU was effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, upon the Company’s adoption of the amendments in ASU 2016-13. The Company adopted the standard on January 1, 2023, and it did not have a material effect on the Company’s consolidated financial statements. ​ In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions to clarify that contractual sale restrictions should not be considered in the measurement of the fair value of an equity security. The Company owns stock in the Federal Reserve Bank (FRB) and in the Federal Home Loan Bank (FHLB) which is valued at historical cost which approximates fair value. Ownership of stock is a condition for services the Company receives from the FRB and FHLB. The stock is not publicly traded and can only be issued, exchanged, redeemed or repurchased by the FRB and the FHLB. ASU 2022-03 is effective for fiscal years beginning after December 15, 2023. The Company does not expect the adoption of this ASU to have a material effect on its consolidated financial statements.

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	9 Months Ended
	Sep. 30, 2023
Cash and Cash Equivalents
Schedule of balances of cash and cash equivalents	​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, (Dollars in thousands) 2023 2022 Cash and due from banks ​ $ 9,479 ​ $ 9,722 ​ Interest-earning deposits in other banks ​ 79,643 ​ 30,831 ​ Cash and cash equivalents ​ $ 89,122 ​ $ 40,553 ​

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2023
Investment Securities
Schedule of amortized cost and fair values of investment securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated ​ ​ (Dollars in thousands) Cost Gains Losses Fair Value ACL September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 22,898 ​ $ — $ (3,755) ​ $ 19,143 ​ $ — Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 695,641 ​ ​ — ​ (159,107) ​ ​ 536,534 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 718,539 ​ $ — $ (162,862) ​ $ 555,677 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 23,544 ​ $ — $ (2,723) ​ $ 20,821 ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 717,773 ​ ​ 62 ​ (126,751) ​ ​ 591,084 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 741,317 ​ $ 62 $ (129,474) ​ $ 611,905 ​ ​ ​ ​
Schedule of amortized cost and estimated fair value of investment securities by maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized Estimated (Dollars in thousands) Cost Fair Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ Due after 10 years ​ $ 22,898 ​ $ 19,143 ​ Total ​ $ 22,898 ​ $ 19,143 ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ Due within 5 years ​ $ 9,302 ​ $ 8,156 ​ Due after 5 years through 10 years ​ 101,494 ​ 84,455 ​ Due after 10 years ​ 584,845 ​ 443,923 ​ Total ​ $ 695,641 ​ $ 536,534 ​
Summary of investment securities in an unrealized loss position	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months 12 Months or Longer Total Unrealized Unrealized Number of Unrealized Description of securities Fair Value Losses Fair Value Losses Securities Fair Value Losses (Dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ — ​ $ — ​ $ 19,143 ​ $ (3,755) 4 ​ $ 19,143 ​ $ (3,755) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 15,701 ​ ​ (820) ​ ​ 520,833 ​ ​ (158,287) 155 ​ ​ 536,534 ​ ​ (159,107) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 15,701 ​ $ (820) ​ $ 539,976 ​ $ (162,042) ​ 159 ​ $ 555,677 ​ $ (162,862) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government sponsored enterprises ​ $ 20,821 ​ $ (2,723) ​ $ — ​ $ — 4 ​ $ 20,821 ​ $ (2,723) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 210,128 ​ ​ (22,209) ​ ​ 377,418 ​ ​ (104,542) 148 ​ ​ 587,546 ​ ​ (126,751) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 230,949 ​ $ (24,932) ​ $ 377,418 ​ $ (104,542) ​ 152 ​ $ 608,367 ​ $ (129,474) ​ ​

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2023
Loans Receivable and Allowance for Credit Losses
Schedule of components of loans receivable	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ ​ (Dollars in thousands) 2023 2022 ​ Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ First mortgages: ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential ​ $ 1,276,549 ​ $ 1,253,558 ​ ​ Multi-family residential ​ 5,985 ​ 6,448 ​ ​ Construction, commercial, and other ​ 15,185 ​ 23,903 ​ ​ Home equity loans and lines of credit ​ 7,002 ​ 6,426 ​ ​ Total real estate loans ​ 1,304,721 ​ 1,290,335 ​ ​ Other loans: ​ ​ ​ ​ ​ ​ ​ ​ Loans on deposit accounts ​ 270 ​ 216 ​ ​ Consumer and other loans ​ 8,369 ​ 8,381 ​ ​ Total other loans ​ ​ 8,639 ​ ​ 8,597 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 1,313,360 ​ 1,298,932 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net unearned fees and discounts ​ (1,939) ​ (2,136) ​ ​ Total loans, net of unearned fees and discounts ​ 1,311,421 ​ 1,296,796 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit/loan losses ​ (5,003) ​ (2,032) ​ ​ Loans receivable, net of allowance for credit/loan losses ​ $ 1,306,418 ​ $ 1,294,764 ​ ​
Schedule of activity in allowance for loan losses on loans receivable and by portfolio segment	The table below presents the activity in the allowance for credit losses by portfolio segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Commercial Consumer ​ ​ (Dollars in thousands) Estate Loans Loans ​ Unallocated Totals ​ Three months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,734 ​ $ 426 ​ $ 102 ​ $ — ​ $ 5,262 ​ (Reversal of provision) provision for credit losses ​ (291) ​ ​ 14 ​ ​ 18 ​ ​ — ​ (259) ​ ​ ​ 4,443 ​ 440 ​ 120 ​ — ​ 5,003 ​ Charge-offs ​ (5) ​ ​ — ​ ​ (22) ​ ​ — ​ (27) ​ Recoveries ​ 25 ​ ​ — ​ ​ 2 ​ ​ — ​ 27 ​ Net recoveries (charge-offs) ​ 20 ​ — ​ (20) ​ — ​ — ​ Balance, end of period ​ $ 4,463 ​ $ 440 ​ $ 100 ​ $ — ​ $ 5,003 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,263 ​ $ 434 ​ $ 76 ​ $ 259 ​ $ 2,032 ​ Adoption of ASU No. 2016-13 ​ ​ 3,393 ​ ​ 71 ​ ​ 4 ​ ​ (259) ​ ​ 3,209 ​ (Reversal of provision) provision for credit losses ​ (146) ​ ​ (65) ​ ​ 64 ​ ​ — ​ (147) ​ ​ ​ 4,510 ​ 440 ​ 144 ​ — ​ 5,094 ​ Charge-offs ​ (72) ​ — ​ (52) ​ — ​ (124) ​ Recoveries ​ 25 ​ — ​ 8 ​ — ​ 33 ​ Net charge-offs ​ (47) ​ — ​ (44) ​ — ​ (91) ​ Balance, end of period ​ $ 4,463 ​ $ 440 ​ $ 100 ​ $ — ​ $ 5,003 ​ ​ We recorded a reversal of credit loss provision of $259,000 under ASC 326 for the three months ended September 30, 2023 that was primarily due to a decrease in our real estate portfolio’s forecasted charge-offs that was partially offset by a decrease in its forecasted prepayments. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial, Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals Three months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,350 ​ $ 445 ​ $ 1 ​ $ 82 ​ $ 253 ​ $ 2,131 ​ (Reversal of provision) provision for loan losses ​ (87) ​ (3) ​ — ​ 1 ​ (20) ​ (109) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 83 ​ 233 ​ 2,022 ​ Charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Recoveries ​ — ​ — ​ — ​ — ​ — ​ — ​ Net charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,814 ​ $ 435 ​ $ 1 ​ $ 89 ​ $ 330 ​ $ 2,669 ​ (Reversal of provision) provision for loan losses ​ (551) ​ 7 ​ — ​ 38 ​ (97) ​ (603) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 127 ​ 233 ​ 2,066 ​ Charge-offs ​ — ​ — ​ — ​ (52) ​ — ​ (52) ​ Recoveries ​ — ​ — ​ — ​ 1 ​ — ​ 1 ​ Net charge-offs ​ — ​ — ​ — ​ (51) ​ — ​ (51) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​
Schedule of balance in allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial, Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending allowance balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ Collectively evaluated for impairment ​ 1,263 ​ 434 ​ 1 ​ 75 ​ 259 ​ 2,032 ​ Total ending allowance balance ​ $ 1,263 ​ $ 434 ​ $ 1 ​ $ 75 ​ $ 259 ​ $ 2,032 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending loan balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 2,693 ​ $ — ​ $ 16 ​ $ — ​ $ 6 ​ $ 2,715 ​ Collectively evaluated for impairment ​ 1,255,300 ​ 23,775 ​ 6,411 ​ 8,595 ​ — ​ 1,294,081 ​ Total ending loan balance ​ $ 1,257,993 ​ $ 23,775 ​ $ 6,427 ​ $ 8,595 ​ $ 6 ​ $ 1,296,796 ​ ​
Schedule of balance of impaired loans individually evaluated for impairment by class of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid Recorded Principal (Dollars in thousands) Investment Balance December 31, 2022: ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,693 ​ $ 3,209 ​ Home equity loans and lines of credit ​ ​ 16 ​ ​ 30 ​ Consumer Loans ​ ​ 6 ​ 6 ​ Total ​ $ 2,715 ​ $ 3,245 ​
Schedule of average recorded investment and interest income recognized on impaired loans by class of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Three Months Ended For the Nine Months Ended September 30, 2022 September 30, 2022 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,431 ​ $ 6 ​ $ 2,465 ​ $ 18 ​ Home equity loans and lines of credit ​ ​ 17 ​ — ​ 18 ​ — ​ Total ​ $ 2,448 ​ $ 6 ​ $ 2,483 ​ $ 18 ​
Schedule of credit quality indicator by loan class and year.	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving Loans ​ ​ ​ ​ Amortized Cost of Term Loans by Origination Year ​ Amortized ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Cost Basis ​ Total September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 382 ​ ​ 368 ​ ​ 4,876 ​ ​ — ​ ​ 211 ​ ​ 1,056 ​ ​ 1,246 ​ ​ 8,139 Total Commercial ​ ​ 382 ​ ​ 368 ​ ​ 4,876 ​ ​ — ​ ​ 211 ​ ​ 1,056 ​ ​ 1,246 ​ ​ 8,139 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 60 - 89 days past due ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 115 ​ ​ 91 ​ ​ 24 ​ ​ 85 ​ ​ 19 ​ ​ 43 ​ ​ 6,211 ​ ​ 6,588 Total Consumer ​ ​ 117 ​ ​ 91 ​ ​ 24 ​ ​ 85 ​ ​ 19 ​ ​ 43 ​ ​ 6,211 ​ ​ 6,590 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 821 ​ ​ — ​ ​ 821 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 140 ​ ​ 138 ​ ​ — ​ ​ 278 Loans not past due ​ ​ 75,289 ​ ​ 130,283 ​ ​ 286,398 ​ ​ 185,292 ​ ​ 92,627 ​ ​ 525,704 ​ ​ — ​ ​ 1,295,593 Total Real Estate ​ ​ 75,289 ​ ​ 130,283 ​ ​ 286,398 ​ ​ 185,292 ​ ​ 92,767 ​ ​ 526,663 ​ ​ — ​ ​ 1,296,692 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 75,788 ​ $ 130,742 ​ $ 291,298 ​ $ 185,377 ​ $ 92,997 ​ $ 527,762 ​ $ 7,457 ​ $ 1,311,421
Schedule of gross charge offs by loan class and year of origination	The following table presents by loan class and year of origination, the gross charge-offs recorded during the three and nine months ended September 30, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Total Three months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 1 ​ $ 4 ​ $ 5 Loans on deposit accounts ​ ​ 21 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 21 Consumer and other ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 Total ​ $ 22 ​ $ — ​ $ — ​ $ — ​ $ 1 ​ $ 4 ​ $ 27 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 11 ​ $ 61 ​ $ 72 Loans on deposit accounts ​ ​ 48 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 48 Consumer and other ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ — ​ ​ 4 Total ​ $ 49 ​ $ — ​ $ — ​ $ — ​ $ 14 ​ $ 61 ​ $ 124
Schedule of aging of loans and accrual status by class of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans 90 Days or More 30 - 59 60 - 89 90 Days or Past Due Days Past Days Past More Total Past Loans Not Total Nonaccrual and Still (Dollars in thousands) Due Due Past Due Due Past Due Loans Loans Accruing September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 821 ​ $ — ​ $ 278 ​ $ 1,099 ​ $ 1,273,578 ​ $ 1,274,677 ​ $ 2,129 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,977 ​ 5,977 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 15,117 ​ 15,117 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,004 ​ 7,004 ​ 13 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 270 ​ 270 ​ — ​ — ​ Consumer and other ​ 1 ​ 1 ​ — ​ 2 ​ 8,374 ​ 8,376 ​ 172 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 822 ​ $ 1 ​ $ 278 ​ $ 1,101 ​ $ 1,310,320 ​ $ 1,311,421 ​ $ 2,314 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ 409 ​ $ 559 ​ $ 968 ​ $ 1,250,586 ​ $ 1,251,554 ​ $ 2,279 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 6,439 ​ 6,439 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 23,775 ​ 23,775 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 6,427 ​ 6,427 ​ 16 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 217 ​ 217 ​ — ​ — ​ Consumer and other ​ 6 ​ — ​ 6 ​ 12 ​ 8,372 ​ 8,384 ​ 6 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 6 ​ $ 409 ​ $ 565 ​ $ 980 ​ $ 1,295,816 ​ $ 1,296,796 ​ $ 2,301 ​ $ — ​
Schedule of amortized cost basis of loans on nonaccrual status	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 December 31, 2022 (Dollars in thousands) Nonaccrual Loans With a Related ACL Nonaccrual Loans Without a Related ACL Total Nonaccrual Loans Total Nonaccrual Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 1,051 ​ $ 1,078 ​ $ 2,129 ​ $ 2,279 Home equity loans and lines of credit ​ ​ 13 ​ ​ — ​ ​ 13 ​ ​ 16 Consumer and other ​ ​ 172 ​ ​ — ​ ​ 172 ​ ​ 6 Total Nonaccrual Loans and Leases ​ $ 1,236 ​ $ 1,078 ​ $ 2,314 ​ $ 2,301

Advances from the Federal Hom_2

Advances from the Federal Home Loan Bank (Tables)	9 Months Ended
	Sep. 30, 2023
Advances from the Federal Home Loan Bank
Schedule of advances outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ December 31, 2022 Weighted ​ Weighted Average ​ Average (Dollars in thousands) Amount Rate Amount Rate Due within one year ​ $ 79,000 1.48 % ​ $ 24,000 1.27 % Due over 1 year to 2 years ​ 52,000 1.99 ​ ​ 82,000 1.40 ​ Due over 2 years to 3 years ​ 30,000 3.64 ​ ​ 25,000 1.58 ​ Due over 3 years to 4 years ​ ​ 30,000 ​ 4.24 ​ ​ ​ 10,000 ​ 1.97 ​ Due over 4 years to 5 years ​ ​ 60,000 ​ 4.32 ​ ​ ​ — ​ — ​ Due over 5 years to 6 years ​ 5,000 4.38 ​ ​ — — ​ Total ​ $ 256,000 2.88 % ​ $ 141,000 1.45 % ​

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2023
Securities Sold Under Agreements to Repurchase
Summary of securities sold under agreements to repurchase	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ December 31, 2022 Weighted ​ Weighted Repurchase Average ​ Repurchase Average (Dollars in thousands) Liability Rate Liability Rate Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Over 1 year to 2 years ​ $ 10,000 1.81 % ​ $ 5,000 1.88 % Over 2 years to 3 years ​ — — ​ ​ ​ 5,000 1.73 ​ Total ​ $ 10,000 1.81 % ​ $ 10,000 1.81 %
Summary comparing carrying value and fair value of securities pledged to secure repurchase agreements, repurchase liability, and amount at risk	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Carrying Fair Average Value of Value of Repurchase Amount Months to (Dollars in thousands) Securities Securities Liability at Risk Maturity Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Over 90 days ​ $ 13,329 ​ $ 10,655 ​ $ 10,000 ​ $ 3,329 15 ​ ​

Offsetting of Financial Liabi_2

Offsetting of Financial Liabilities (Tables)	9 Months Ended
	Sep. 30, 2023
Offsetting of Financial Liabilities
Schedule of securities sold under agreements to repurchase subject to conditional right of offset	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Amount of Gross Amount Not Offset in the Gross Amount Gross Amount Liabilities Balance Sheet of Recognized Offset in the Presented in the Financial Cash Collateral (Dollars in thousands) Liabilities Balance Sheet Balance Sheet Instruments ​ Pledged Net Amount September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​

Employee Stock Ownership Plan (

Employee Stock Ownership Plan (Tables)	9 Months Ended
	Sep. 30, 2023
Employee Stock Ownership Plan.
Schedule of shares held by the ESOP trust	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, 2023 2022 Allocated shares ​ 607,705 ​ 583,474 ​ ​ Unearned shares ​ 256,898 ​ 293,598 ​ ​ Total ESOP shares ​ 864,603 ​ 877,072 ​ ​ Fair value of unearned shares, in thousands ​ $ 2,335 ​ $ 7,049 ​ ​

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2023
Schedule of compensation expense and related tax benefit for all share-based awards	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands) 2023 2022 2023 2022 Compensation expense ​ $ 88 ​ $ (18) ​ $ 90 ​ $ 256 ​ Income tax benefit ​ 24 ​ (5) ​ 24 ​ 70 ​
Restricted Stock
Schedule of restricted stock award activity	​ ​ ​ ​ ​ ​ ​ ​ Weighted Time-Based Average Grant Restricted Date Fair Stock Value Unvested at December 31, 2022 23,664 ​ $ 24.15 ​ Granted 14,803 ​ 19.29 ​ Vested 12,729 ​ 23.64 ​ Forfeited — ​ — ​ Unvested at September 30, 2023 25,738 ​ $ 21.61 ​ ​ ​ ​ ​ ​ ​ ​ Unvested at December 31, 2021 23,208 ​ $ 24.61 ​ Granted 12,013 ​ 23.77 ​ Vested 11,557 ​ 24.68 ​ Forfeited — ​ — ​ Unvested at September 30, 2022 23,664 ​ $ 24.15 ​
Restricted Stock Units Based on a Performance Condition
Schedule of restricted stock award activity	​ ​ ​ ​ ​ ​ ​ Performance- ​ ​ ​ ​ Based Restricted ​ ​ ​ Stock Units Weighted ​ ​ Based on a ​ Average Grant ​ ​ Performance ​ Date Fair Condition Value Unvested at December 31, 2022 43,557 ​ $ 23.63 Granted 17,758 ​ 19.29 Vested — ​ — Forfeited 16,348 ​ 21.05 Unvested at September 30, 2023 44,967 ​ $ 22.85 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2021 41,583 ​ $ 24.68 Granted 14,412 ​ 23.77 Vested 7,670 ​ 27.30 Forfeited 4,768 ​ 27.30 Unvested at September 30, 2022 43,557 ​ $ 23.63
Restricted Stock Units Based on a Market Condition
Schedule of restricted stock award activity	​ ​ ​ ​ ​ ​ ​ ​ ​ Performance- ​ ​ ​ ​ ​ Based Restricted ​ Monte Carlo ​ ​ Stock Units ​ Valuation of ​ ​ Based on a ​ the Company's Market Condition Stock Unvested at December 31, 2022 10,889 ​ $ 24.04 Granted 4,443 ​ ​ 17.95 Vested — ​ — Forfeited 4,087 ​ 22.16 Unvested at September 30, 2023 11,245 ​ $ 22.31 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2021 10,396 ​ $ 24.03 Granted 3,603 ​ ​ 24.42 Vested — ​ — Forfeited 3,110 ​ 24.45 Unvested at September 30, 2022 10,889 ​ $ 24.04

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2023
Earnings Per Share
Schedule of information used to compute basic and diluted earnings per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands, except per share data) 2023 2022 2023 2022 Net income ​ $ 880 ​ $ 3,891 ​ $ 4,693 ​ $ 12,711 ​ Income allocated to participating securities ​ ​ (15) ​ ​ (23) ​ ​ (44) ​ ​ (70) ​ Net income available to common shareholders ​ $ 865 ​ $ 3,868 ​ $ 4,649 ​ $ 12,641 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average number of shares used in: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per share ​ 8,577,632 ​ 8,802,010 ​ 8,656,915 ​ 8,885,626 ​ Dilutive common stock equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options and restricted stock units ​ 32,657 ​ 44,601 ​ 48,869 ​ 53,182 ​ Diluted earnings per share ​ 8,610,289 ​ 8,846,611 ​ 8,705,784 ​ 8,938,808 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income per common share, basic ​ $ 0.10 ​ $ 0.44 ​ $ 0.54 ​ $ 1.42 ​ Net income per common share, diluted ​ $ 0.10 ​ $ 0.44 ​ $ 0.53 ​ $ 1.41 ​

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2023
Accumulated Other Comprehensive Loss
Schedule of changes in components of accumulated other comprehensive loss, net of taxes	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unfunded Unrealized Pension Loss/(Gain) on (Dollars in thousands) Liability Securities Total Three months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,975 ​ $ 7,721 ​ Other comprehensive loss, net of taxes ​ ​ — ​ 780 ​ 780 ​ Net current period other comprehensive loss ​ — ​ 780 ​ 780 ​ Balances at end of period ​ $ 5,746 ​ $ 2,755 ​ $ 8,501 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ 877 ​ $ 6,401 ​ Other comprehensive loss, net of taxes ​ — ​ 1,114 ​ 1,114 ​ Net current period other comprehensive loss ​ — ​ 1,114 ​ 1,114 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,998 ​ $ 7,744 ​ Other comprehensive loss, net of taxes ​ — ​ 757 ​ 757 ​ Net current period other comprehensive loss ​ — ​ 757 ​ 757 ​ Balances at end of period ​ $ 5,746 ​ $ 2,755 ​ $ 8,501 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ — ​ $ 5,524 ​ Other comprehensive loss, net of taxes ​ ​ — ​ ​ 1,991 ​ ​ 1,991 ​ Net current period other comprehensive loss ​ — ​ 1,991 ​ 1,991 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​
Schedule of tax effect on each component of accumulated other comprehensive loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2023 2022 Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 1,063 ​ $ (283) ​ $ 780 ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ Total ​ $ 1,063 ​ $ (283) ​ $ 780 ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended September 30, ​ 2023 2022 ​ Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 1,032 ​ $ (275) ​ $ 757 ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ Total ​ $ 1,032 ​ $ (275) ​ $ 757 ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ ​

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2023
Revenue Recognition
Reconciliation of revenue from contracts with customers and other revenue reported in line items	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Service and ​ ​ ​ ​ (Dollars in thousands) Other Fees Other Total Three months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 265 ​ $ 16 ​ $ 281 Other revenue ​ ​ 33 ​ ​ 57 ​ ​ 90 Total ​ $ 298 ​ $ 73 ​ $ 371 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 304 ​ $ 38 ​ $ 342 Other revenue ​ ​ 35 ​ ​ 38 ​ ​ 73 Total ​ $ 339 ​ $ 76 ​ $ 415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 917 ​ $ 85 ​ $ 1,002 Other revenue ​ ​ 105 ​ ​ 123 ​ ​ 228 Total ​ $ 1,022 ​ $ 208 ​ $ 1,230 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 989 ​ $ 138 ​ $ 1,127 Other revenue ​ ​ 103 ​ ​ 1,221 ​ ​ 1,324 Total ​ $ 1,092 ​ $ 1,359 ​ $ 2,451 ​

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2023
Leases
Schedule of lease costs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ September 30, September 30, (Dollars in thousands) 2023 2022 2023 2022 Lease costs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease costs ​ $ 689 ​ $ 712 ​ $ 2,084 ​ $ 2,211 ​ Short-term lease costs ​ 160 ​ 107 ​ 375 ​ 199 ​ Variable lease costs ​ 45 ​ 49 ​ 122 ​ 127 ​ Total lease costs ​ $ 894 ​ $ 868 ​ $ 2,581 ​ $ 2,537 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash paid for amounts included in measurement of lease liabilities ​ $ (1,901) ​ $ 854 ​ $ (1,271) ​ $ 2,381 ​ ROU assets obtained in exchange for new operating lease liabilities ​ $ 84 ​ $ 2,003 ​ $ 590 ​ $ 6,833 ​ ​
Schedule of future minimum rental commitments under noncancellable operating leases and lease payment obligations	​ ​ ​ ​ ​ ​ ​ September 30, (Dollars in thousands) 2023 2023 ​ $ 725 2024 ​ 2,818 2025 ​ 2,199 2026 ​ 2,038 2027 ​ 1,961 Thereafter ​ 11,028 Total ​ ​ 20,769 ​ ​ ​ ​ Less lease incentives to be received in 2023 ​ ​ (1,273) Less present value discount ​ ​ (2,111) Present value of leases ​ $ 17,385 ​
Schedule of other lease related information	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ ​ September 30, ​ ​ ​ 2023 ​ 2022 ​ Weighted-average remaining lease term (years) ​ 9.72 ​ ​ 9.03 ​ ​ Weighted-average discount rate ​ ​ 2.14 % ​ ​ 2.04 % ​ ​

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value
Schedule of estimated fair values of financial instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ ​ ​ ​ Fair Value Measurements Using (Dollars in thousands) Amount Fair Value Level 1 Level 2 Level 3 September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 89,112 ​ $ 89,112 ​ $ 89,112 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 19,143 ​ ​ 19,143 ​ ​ — ​ ​ 19,143 ​ ​ — ​ Investment securities held to maturity ​ 695,641 ​ ​ 536,534 ​ ​ — ​ ​ 536,534 ​ ​ — ​ Loans receivable, net ​ 1,306,418 ​ ​ 1,037,090 ​ ​ — ​ ​ — ​ ​ 1,037,090 ​ FHLB stock ​ 12,844 ​ ​ 12,844 ​ ​ — ​ ​ 12,844 ​ ​ — ​ FRB stock ​ ​ 3,177 ​ ​ 3,177 ​ ​ — ​ ​ 3,177 ​ ​ — ​ Accrued interest receivable ​ 6,131 ​ ​ 6,131 ​ ​ 110 ​ ​ 1,509 ​ ​ 4,512 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,651,013 ​ ​ 1,645,726 ​ ​ — ​ ​ 1,124,546 ​ ​ 521,180 ​ Advances from the Federal Home Loan Bank ​ 256,000 ​ ​ 247,722 ​ ​ — ​ ​ 247,722 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,568 ​ ​ — ​ ​ 9,568 ​ ​ — ​ Accrued interest payable ​ 1,476 ​ ​ 1,476 ​ ​ — ​ ​ 41 ​ ​ 1,435 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 40,553 ​ $ 40,553 ​ $ 40,553 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 20,821 ​ ​ 20,821 ​ ​ — ​ ​ 20,821 ​ ​ — ​ Investment securities held to maturity ​ 717,773 ​ ​ 591,084 ​ ​ — ​ ​ 591,084 ​ ​ — ​ Loans receivable, net ​ 1,294,764 ​ ​ 1,180,840 ​ ​ — ​ ​ — ​ ​ 1,180,840 ​ FHLB stock ​ 8,197 ​ ​ 8,197 ​ ​ — ​ ​ 8,197 ​ ​ — ​ FRB stock ​ ​ 3,170 ​ ​ 3,170 ​ ​ — ​ ​ 3,170 ​ ​ — ​ Accrued interest receivable ​ 6,115 ​ ​ 6,115 ​ ​ 23 ​ ​ 1,497 ​ ​ 4,595 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,716,152 ​ ​ 1,708,612 ​ ​ — ​ ​ 1,286,465 ​ ​ 422,147 ​ Advances from the Federal Home Loan Bank ​ 141,000 ​ ​ 133,145 ​ ​ — ​ ​ 133,145 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,440 ​ ​ — ​ ​ 9,440 ​ ​ — ​ Accrued interest payable ​ 701 ​ ​ 701 ​ ​ — ​ ​ 33 ​ ​ 668 ​
Schedule of assets and liabilities measured at fair value on a recurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Level 1 Level 2 Level 3 Total September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 19,143 ​ $ — ​ $ 19,143 ​ Interest rate contracts ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ — ​ 20,821 ​ — ​ 20,821 ​ Interest rate contracts ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​

Organization - Narrative (Detai

Organization - Narrative (Details)	9 Months Ended
	Sep. 30, 2023 subsidiary
Organization
Number of inactive subsidiaries	1

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Allowance of Credit Losses (ACL) on Loans and Securities (Details) $ in Millions	Sep. 30, 2023 USD ($)
Summary of Significant Accounting Policies
Financing receivable accrued interest after allowance for credit loss	$ 4.5

Recently Issued Accounting Pr_2

Recently Issued Accounting Pronouncements (Details) - USD ($)		3 Months Ended	9 Months Ended
	Jan. 01, 2023	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Reversal of provision for credit losses		$ (259,000)	$ (147,000)
After-tax decrease to retained earnings		$ 211,741,000	$ 211,741,000	$ 215,314,000
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Reversal of provision for credit losses	$ 3,200,000
After-tax decrease to retained earnings	$ (2,300,000)

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Cash and Cash Equivalents
Cash and due from banks	$ 9,479	$ 9,722
Interest-earning deposits in other banks	79,643	30,831
Cash and cash equivalents	$ 89,122	$ 40,553

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Values of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Available-for-Sale [Abstract]
Amortized Cost	$ 22,898
Estimated Fair Value	19,143	$ 20,821
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	695,641	717,773
Estimated Fair Value	536,534	591,084
Debt Securities, Available-for-Sale and Held-to-Maturity, after Allowance for Credit Loss [Abstract]
Total Amortized Cost	718,539	741,317
Total Gross Unrealized Gains		62
Total Gross Unrealized Losses	(162,862)	(129,474)
Total Estimated Fair Value	555,677	611,905
U.S. government-sponsored mortgage-backed securities
Available-for-Sale [Abstract]
Amortized Cost	22,898	23,544
Gross Unrealized Losses	(3,755)	(2,723)
Estimated Fair Value	19,143	20,821
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	695,641	717,773
Gross Unrealized Gains		62
Gross Unrealized Losses	(159,107)	(126,751)
Estimated Fair Value	536,534	$ 591,084
Debt Securities, Available-for-Sale and Held-to-Maturity, after Allowance for Credit Loss [Abstract]
Total ACL	$ 0

Investment Securities - Maturit

Investment Securities - Maturity Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost
Due after 10 years	$ 22,898
Amortized Cost	22,898
Estimated Fair Value
Due after 10 years	19,143
Estimated Fair Value	19,143	$ 20,821
U.S. government-sponsored mortgage-backed securities
Amortized Cost
Amortized Cost	22,898	23,544
Estimated Fair Value
Estimated Fair Value	$ 19,143	$ 20,821

Investment Securities - Matur_2

Investment Securities - Maturity Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Held-to-maturity, Amortized Cost
Due within 5 years	$ 9,302
Due after 5 years through 10 years	101,494
Due after 10 years	584,845
Amortized Cost	695,641	$ 717,773
Held-to-maturity, Estimated Fair Value
Due within 5 years	8,156
Due after 5 years through 10 years	84,455
Due after 10 years	443,923
Estimated Fair Value	$ 536,534	$ 591,084

Investment Securities - Securit

Investment Securities - Securities Pledged (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Realized gains and losses and the proceeds from sales of securities
Amortized cost	$ 695,641	$ 717,773
Debt Securities, Held-to-Maturity, Pledged Status [Extensible Enumeration]	Asset Pledged as Collateral with Right [Member]
Debt Securities, Held-to-Maturity, Pledging Purpose [Extensible Enumeration]	Amortized cost
Asset Pledged as Collateral with Right [Member] | Deposits [Member]
Realized gains and losses and the proceeds from sales of securities
Amortized cost	$ 562,700	272,800
Asset Pledged as Collateral with Right [Member] | Federal Reserve Bank discount window [Member]
Realized gains and losses and the proceeds from sales of securities
Amortized cost	74,800	$ 5,400
Asset Pledged as Collateral with Right [Member] | Federal Reserve Bank Bank Term Funding Program [Member]
Realized gains and losses and the proceeds from sales of securities
Amortized cost	$ 204,300

Investment Securities - Availab

Investment Securities - Available-for-Sale Unrealized Loss Position Summary (Details) $ in Thousands	Sep. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Investment Securities
Less Than 12 Months Fair Value		$ 20,821
Less Than 12 Months Unrealized Losses		$ (2,723)
12 Months or Longer Fair Value	$ 19,143
12 Months or Longer Unrealized Losses	$ (3,755)
Number of Securities | security	4	4
Total Fair Value	$ 19,143	$ 20,821
Total Unrealized Losses	$ (3,755)	$ (2,723)

Investment Securities - Held-to

Investment Securities - Held-to-Maturity Unrealized Loss Position Summary (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) security
Investment Securities
Less Than 12 Months Fair Value	$ 15,701	$ 210,128
Less Than 12 Months Unrealized Losses	(820)	(22,209)
12 Months or Longer Fair Value	520,833	377,418
12 Months or Longer Unrealized Losses	$ (158,287)	$ (104,542)
Total Number of Securities	155	148
Total Fair Value	$ 536,534	$ 587,546
Total Unrealized Losses	$ (159,107)	$ (126,751)

Investment Securities - Avail_2

Investment Securities - Available-for-Sale Unrealized Loss and Held-to-Maturity Total Unrealized Loss Position Summary (Details) $ in Thousands	Sep. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Investment Securities
Total Less Than 12 Months Unrealized Fair Value	$ 15,701	$ 230,949
Total Less Than 12 Months Unrealized Losses	(820)	(24,932)
Total 12 Months or Longer Unrealized Fair Value	539,976	377,418
Total 12 Months or Longer Unrealized Losses	$ (162,042)	$ (104,542)
Total Number of Securities | security	159	152
Total Fair value	$ 555,677	$ 608,367
Total Unrealized losses	$ (162,862)	$ (129,474)

Investment Securities - Mortgag

Investment Securities - Mortgage-Backed Securities (Details) $ in Thousands	Sep. 30, 2023 USD ($)
U.S. government-sponsored mortgage-backed securities
Schedule of Equity Method Investments [Line Items]
Allowance for credit losses	$ 0

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Credit Losses - Components (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Loans receivable
Total loans	$ 1,313,360
Total loans			$ 1,298,932
Net unearned fees and discounts	(1,939)
Net unearned fees and discounts			(2,136)
Total loans, net of unearned fees and discounts	1,311,421
Total loans, net of unearned fees and discounts			1,296,796
Allowance for credit/loan losses	(5,003)	$ (5,262)	(2,032)
Allowance for credit/loan losses			(2,032)	$ (2,015)	$ (2,131)	$ (2,669)
Loans receivable, net of allowance for credit/loan losses	1,306,418
Loans receivable, net of allowance for credit/loan losses			1,294,764
Construction, Commercial and Other Mortgage Loans
Loans receivable
Allowance for credit/loan losses			(434)	(442)	(445)	(435)
Home Equity Loans and Lines of Credit
Loans receivable
Allowance for credit/loan losses			(1)	(1)	(1)	(1)
Consumer and other
Loans receivable
Allowance for credit/loan losses			(75)	(76)	(82)	(89)
Other Financing Receivables
Loans receivable
Total loans	8,639
Total loans			8,597
Unallocated
Loans receivable
Allowance for credit/loan losses			(259)
Allowance for credit/loan losses			(259)	$ (233)	$ (253)	$ (330)
Real estate loans
Loans receivable
Total loans	1,304,721
Total loans			1,290,335
Real estate loans | One- to four-family residential
Loans receivable
Total loans	1,276,549
Total loans			1,253,558
Real estate loans | Multi-family residential
Loans receivable
Total loans	5,985
Total loans			6,448
Real estate loans | Construction, Commercial and Other Mortgage Loans
Loans receivable
Total loans	15,185
Total loans			23,903
Real estate loans | Home Equity Loans and Lines of Credit
Loans receivable
Total loans	7,002
Total loans			6,426
Other loans | Loans on Deposit Accounts
Loans receivable
Total loans	270
Total loans			216
Other loans | Consumer and other
Loans receivable
Total loans	$ 8,369
Total loans			$ 8,381

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Credit Losses - Activity in Allowance for Loan Losses by Segment (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jan. 01, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Activity in allowance for loan losses
Balance, beginning of period	$ 2,032,000	$ 5,262,000		$ 2,032,000
(Reversal of provision) provision for credit losses		(259,000)		(147,000)
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses		5,003,000		5,094,000
Charge-offs		(27,000)		(124,000)
Recoveries		27,000		33,000
Net charge-offs				(91,000)
Balance, end of period		5,003,000		5,003,000
Activity in allowance for loan losses, prior adoption
Balance, beginning of period	2,032,000		$ 2,131,000	2,032,000	$ 2,669,000
(Reversal of provision) provision for loan losses			(109,000)		(603,000)
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses			2,022,000		2,066,000
Charge-offs			(7,000)		(52,000)
Recoveries					1,000
Net charge-offs			(7,000)		(51,000)
Balance, end of period			2,015,000		2,015,000
Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
(Reversal of provision) provision for credit losses	3,200,000
Balance, end of period		3,209,000		3,209,000
Real Estate
Activity in allowance for loan losses
Balance, beginning of period	1,263,000	4,734,000		1,263,000
(Reversal of provision) provision for credit losses		(291,000)		(146,000)
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses		4,443,000		4,510,000
Charge-offs		(5,000)		(72,000)
Recoveries		25,000		25,000
Net charge-offs		20,000		(47,000)
Balance, end of period		4,463,000		4,463,000
Real Estate | Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		3,393,000		3,393,000
Commercial
Activity in allowance for loan losses
Balance, beginning of period	434,000	426,000		434,000
(Reversal of provision) provision for credit losses		14,000		(65,000)
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses		440,000		440,000
Balance, end of period		440,000		440,000
Commercial | Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		71,000		71,000
Residential Mortgage
Activity in allowance for loan losses, prior adoption
Balance, beginning of period	1,263,000		1,350,000	1,263,000	1,814,000
(Reversal of provision) provision for loan losses			(87,000)		(551,000)
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses			1,263,000		1,263,000
Balance, end of period			1,263,000		1,263,000
Construction, Commercial and Other Mortgage Loans
Activity in allowance for loan losses, prior adoption
Balance, beginning of period	434,000		445,000	434,000	435,000
(Reversal of provision) provision for loan losses			(3,000)		7,000
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses			442,000		442,000
Balance, end of period			442,000		442,000
Home Equity Loans and Lines of Credit
Activity in allowance for loan losses, prior adoption
Balance, beginning of period	1,000		1,000	1,000	1,000
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses			1,000		1,000
Balance, end of period			1,000		1,000
Consumer
Activity in allowance for loan losses
Balance, beginning of period	76,000	102,000		76,000
(Reversal of provision) provision for credit losses		18,000		64,000
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses		120,000		144,000
Charge-offs		(22,000)		(52,000)
Recoveries		2,000		8,000
Net charge-offs		(20,000)		(44,000)
Balance, end of period		100,000		100,000
Consumer | Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		4,000		4,000
Unallocated
Activity in allowance for loan losses
Balance, beginning of period	259,000			259,000
Activity in allowance for loan losses, prior adoption
Balance, beginning of period	259,000		253,000	259,000	330,000
(Reversal of provision) provision for loan losses			(20,000)		(97,000)
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses			233,000		233,000
Balance, end of period			233,000		233,000
Unallocated | Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		$ (259,000)		(259,000)
Consumer and other
Activity in allowance for loan losses, prior adoption
Balance, beginning of period	$ 75,000		82,000	$ 75,000	89,000
(Reversal of provision) provision for loan losses			1,000		38,000
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses			83,000		127,000
Charge-offs			(7,000)		(52,000)
Recoveries					1,000
Net charge-offs			(7,000)		(51,000)
Balance, end of period			$ 76,000		$ 76,000

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Credit Losses - Allowance for Loan Losses and Loans, Net of Unearned Fees and Discounts, by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Allowance for loan losses:
Collectively evaluated for impairment			$ 2,032
Total ending allowance balance	$ 5,003	$ 5,262	2,032
Total ending allowance balance			2,032	$ 2,015	$ 2,131	$ 2,669
Loans:
Individually evaluated for impairment			2,715
Collectively evaluated for impairment			1,294,081
Total ending loan balance			1,296,796
Total ending loan balance	$ 1,311,421
Residential Mortgage
Allowance for loan losses:
Collectively evaluated for impairment			1,263
Total ending allowance balance			1,263	1,263	1,350	1,814
Loans:
Individually evaluated for impairment			2,693
Collectively evaluated for impairment			1,255,300
Total ending loan balance			1,257,993
Construction, Commercial and Other Mortgage Loans
Allowance for loan losses:
Collectively evaluated for impairment			434
Total ending allowance balance			434	442	445	435
Loans:
Collectively evaluated for impairment			23,775
Total ending loan balance			23,775
Home Equity Loans and Lines of Credit
Allowance for loan losses:
Collectively evaluated for impairment			1
Total ending allowance balance			1	1	1	1
Loans:
Individually evaluated for impairment			16
Collectively evaluated for impairment			6,411
Total ending loan balance			6,427
Consumer and other
Allowance for loan losses:
Collectively evaluated for impairment			75
Total ending allowance balance			75	76	82	89
Loans:
Collectively evaluated for impairment			8,595
Total ending loan balance			8,595
Unallocated
Allowance for loan losses:
Collectively evaluated for impairment			259
Total ending allowance balance			259
Total ending allowance balance			259	$ 233	$ 253	$ 330
Loans:
Individually evaluated for impairment			6
Total ending loan balance			$ 6

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Credit Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 27	$ 124
Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	22	49
Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs	1	14
Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	4	61
One- to four-family residential
Impaired Financing Receivable 1 [Line Items]
Charge offs	5	72
One- to four-family residential | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs	1	11
One- to four-family residential | Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	4	61
Loans on Deposit Accounts
Impaired Financing Receivable 1 [Line Items]
Charge offs	21	48
Loans on Deposit Accounts | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	21	48
Consumer and other
Impaired Financing Receivable 1 [Line Items]
Charge offs	1	4
Consumer and other | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 1	1
Consumer and other | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs		$ 3

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses - Amortized Cost by Credit Quality Indicator (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Financing Receivable, Recorded Investment, Past Due
2023	$ 75,788
2022	130,742
2021	291,298
2020	185,377
2019	92,997
Prior	527,762
Revolving Loans Amortized Cost Basis	7,457
Total	1,311,421
Commercial
Financing Receivable, Recorded Investment, Past Due
2023	382
2022	368
2021	4,876
2019	211
Prior	1,056
Revolving Loans Amortized Cost Basis	1,246
Total	8,139
Consumer
Financing Receivable, Recorded Investment, Past Due
2023	117
2022	91
2021	24
2020	85
2019	19
Prior	43
Revolving Loans Amortized Cost Basis	6,211
Total	6,590
Real Estate
Financing Receivable, Recorded Investment, Past Due
2023	75,289
2022	130,283
2021	286,398
2020	185,292
2019	92,767
Prior	526,663
Total	1,296,692
Not Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due
2023	382
2022	368
2021	4,876
2019	211
Prior	1,056
Revolving Loans Amortized Cost Basis	1,246
Total	8,139
Not Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due
2023	115
2022	91
2021	24
2020	85
2019	19
Prior	43
Revolving Loans Amortized Cost Basis	6,211
Total	6,588
Not Past Due | Real Estate
Financing Receivable, Recorded Investment, Past Due
2023	75,289
2022	130,283
2021	286,398
2020	185,292
2019	92,627
Prior	525,704
Total	1,295,593
30 - 59 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due
2023	1
Total	1
30 - 59 Days Past Due | Real Estate
Financing Receivable, Recorded Investment, Past Due
Prior	821
Total	821
60 - 89 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due
2023	1
Total	1
90 Days or More Past Due | Real Estate
Financing Receivable, Recorded Investment, Past Due
2019	140
Prior	138
Total	$ 278

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Credit Losses - Gross Charge offs by Loan Class and Year (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2022
Impaired Financing Receivable 1 [Line Items]
Recorded Investment			$ 2,715
Unpaid Principal Balance			3,245
Average Recorded Investment	$ 2,448	$ 2,483
Interest Income Recognized	6	18
Loans individually evaluated for impairment with a related allowance for loan loss			0
One- to four-family residential
Impaired Financing Receivable 1 [Line Items]
Recorded Investment			2,693
Unpaid Principal Balance			3,209
Average Recorded Investment	2,431	2,465
Interest Income Recognized	6	18
Home equity loans and lines of credit
Impaired Financing Receivable 1 [Line Items]
Recorded Investment			16
Unpaid Principal Balance			30
Average Recorded Investment	$ 17	$ 18
Consumer and other
Impaired Financing Receivable 1 [Line Items]
Recorded Investment			6
Unpaid Principal Balance			$ 6

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Credit Losses - Aging of Loans and Accrual Status by Class (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due
Total Loans	$ 1,311,421,000
Total Loans		$ 1,296,796,000
Nonaccrual Loans	2,314,000	2,301,000
Loans 90 Days or More Past Due and Still Accruing	0	0
One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,274,677,000
Total Loans		1,251,554,000
Nonaccrual Loans	2,129,000	2,279,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Multi-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	5,977,000
Total Loans		6,439,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Construction, Commercial and Other Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Total Loans	15,117,000
Total Loans		23,775,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due
Total Loans	7,004,000
Total Loans		6,427,000
Nonaccrual Loans	13,000	16,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Loans on Deposit Accounts
Financing Receivable, Recorded Investment, Past Due
Total Loans	270,000
Total Loans		217,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	8,376,000
Total Loans		8,384,000
Nonaccrual Loans	172,000	6,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Not Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,310,320,000
Total Loans		1,295,816,000
Not Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,273,578,000
Total Loans		1,250,586,000
Not Past Due | Multi-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	5,977,000
Total Loans		6,439,000
Not Past Due | Construction, Commercial and Other Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Total Loans	15,117,000
Total Loans		23,775,000
Not Past Due | Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due
Total Loans	7,004,000
Total Loans		6,427,000
Not Past Due | Loans on Deposit Accounts
Financing Receivable, Recorded Investment, Past Due
Total Loans	270,000
Total Loans		217,000
Not Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	8,374,000
Total Loans		8,372,000
Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,101,000
Total Loans		980,000
Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,099,000
Total Loans		968,000
Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	2,000
Total Loans		12,000
30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	822,000
Total Loans		6,000
30 - 59 Days Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	821,000
30 - 59 Days Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,000
Total Loans		6,000
60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,000
Total Loans		409,000
60 - 89 Days Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans		409,000
60 - 89 Days Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,000
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	278,000
Total Loans		565,000
90 Days or More Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	278,000
Total Loans	$ 279,000	559,000
90 Days or More Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans		$ 6,000

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Credit Losses - Amortized cost basis of loans on nonaccrual status (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a related ACL	$ 1,236
Nonaccrual loans without a related ACL	1,078
Total Nonaccrual Loans	2,314
Total Nonaccrual Loans	2,314	$ 2,301
One- to four-family residential
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a related ACL	1,051
Nonaccrual loans without a related ACL	1,078
Total Nonaccrual Loans	2,129
Total Nonaccrual Loans	2,129	2,279
Home equity loans and lines of credit
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a related ACL	13
Total Nonaccrual Loans	13
Total Nonaccrual Loans	13	16
Consumer and other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a related ACL	172
Total Nonaccrual Loans	172
Total Nonaccrual Loans	$ 172	$ 6

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Credit Losses - Delinquent and Nonaccrual Loans (Details)	9 Months Ended
	Sep. 30, 2023
Loans Receivable and Allowance for Credit Losses
Loan delinquency period that may result in loss	90 days
Loan delinquency period after which an appraisal is obtained of the underlying collateral	4 months

Loans Receivable and Allowan_12

Loans Receivable and Allowance for Credit Losses - Maui Wildfire (Details)	Sep. 30, 2023 USD ($)	Aug. 31, 2023 USD ($) item
Accounts, Notes, Loans and Financing Receivable
Total Loans	$ 1,311,421,000
Residential real estate | Not impacted by Maui wildfires
Accounts, Notes, Loans and Financing Receivable
Total Loans	18,800,000
Residential real estate | Impacted by Maui wildfires
Accounts, Notes, Loans and Financing Receivable
Number of homes | item		11
Loan paid off	164,000
Total Loans	$ 2,900,000	$ 3,100,000

Loans Receivable and Allowan_13

Loans Receivable and Allowance for Credit Losses - Collateral, Sales, Serviced for Others, Directors and Executive Officers (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2023 loan	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable
Residential mortgage loans sold, recognized gains			$ 10,000	$ 3,000
Loans serviced for others	$ 34,100,000		34,100,000			$ 36,000,000
Loans serviced for others, securitization for which the company continues to hold the related mortgage-backed securities	19,600,000		19,600,000			$ 20,700,000
Loans serviced for others, amount of contractually specified servicing fees earned	$ 23,000	$ 24,000	$ 69,000	77,000
Maximum
Accounts, Notes, Loans and Financing Receivable
Loan to value ratio (as a percent)	80%		80%
Residential Mortgage Loans Held For Sale
Accounts, Notes, Loans and Financing Receivable
Residential mortgage loans sold, loan amount			$ 827,000	$ 5,400,000
Number of nonaccrual loans | loan					0

Loans Receivable and Allowan_14

Loans Receivable and Allowance for Credit Losses - Troubled Debt Restructurings (Details)	9 Months Ended
	Sep. 30, 2023 USD ($) loan	Sep. 30, 2022 loan	Dec. 31, 2022 USD ($)
Additional disclosures
Real estate owned	$ 0		$ 0
Loans modified in troubled debt restructuring
Troubled debt restructurings
Number of loans | loan	0	0
Residential Mortgage
Additional disclosures
Mortgage loans in process of foreclosure, number of contracts	3		2
Mortgage loans in process of foreclosure, total value			$ 227,000
Residential Mortgage | One- to four-family residential
Additional disclosures
Mortgage loans in process of foreclosure, total value	$ 279,000

Advances from the Federal Hom_3

Advances from the Federal Home Loan Bank (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Federal Home Loan Bank advances
Federal Home Loan Bank stock, at cost	$ 12,844	$ 8,197
Federal Home Loan Bank, Advances, Rolling Maturity
Due within one year	79,000	24,000
Due over 1 year to 2 years	52,000	82,000
Due over 2 years to 3 years	30,000	25,000
Due over 3 years to 4 years	30,000	10,000
Due over 4 years to 5 years	60,000
Due over 5 years to 6 years	5,000
Total	$ 256,000	$ 141,000
Weighted Average Rate
Due within one year (as a percent)	1.48%	1.27%
Due over 1 year to 2 years (as a percent)	1.99%	1.40%
Due over 2 years to 3 years (as a percent)	3.64%	1.58%
Due over 3 years to 4 years (as a percent)	4.24%	1.97%
Due over 4 years to 5 years (as a percent)	4.32%
Due over 5 years to 6 years (as a percent)	4.38%
Total (as a percent)	2.88%	1.45%
FHLB Des Moines
Federal Home Loan Bank advances
Available additional unused FHLB advances	$ 593,900	$ 769,100
Territorial Savings Bank | FHLB Des Moines
Federal Home Loan Bank advances
Percentage of total assets used to determine maximum line of credit	45%

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Summary of Repurchase Liability by Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Securities sold under agreements to repurchase
Repurchase Liability	$ 10,000	$ 10,000
Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.81%	1.81%
Over 1 year to 2 years
Securities sold under agreements to repurchase
Repurchase Liability	$ 10,000	$ 5,000
Over 1 year to 2 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.81%	1.88%
Over 2 years to 3 years
Securities sold under agreements to repurchase
Repurchase Liability		$ 5,000
Over 2 years to 3 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)		1.73%

Securities Sold Under Agreeme_4

Securities Sold Under Agreements to Repurchase - Summary of Securities Pledged (Details) - Maturing Over 90 days $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Securities sold under agreements to repurchase
Carrying Value of Securities	$ 13,329
Fair Value of Securities	10,655
Repurchase Liability	10,000
Amount at Risk	$ 3,329
Weighted Average Months to Maturity	15 months

Offsetting of Financial Liabi_3

Offsetting of Financial Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Securities sold under agreements to repurchase
Gross Amount of Recognized Liabilities	$ 10,000	$ 10,000
Net Amount of Liabilities Presented in the Balance Sheet	10,000	10,000
Gross amount not offset in the balance sheet
Financial Instruments	$ 10,000	$ 10,000

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Loan, Expense and Shares (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jan. 01, 2009	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Employee Stock Ownership Plan
Allocated shares		607,705		607,705		583,474
Unearned shares		256,898		256,898		293,598
Total ESOP shares		864,603		864,603		877,072
Fair value of unearned shares, in thousands		$ 2,335,000		$ 2,335,000		$ 7,049,000
ESOP
Employee Stock Ownership Plan
Amount borrowed from employer	$ 9,800,000
Shares purchased	978,650
Percentage of shares issued in initial public offering	8%
Employee stock ownership plan, price per share of shares acquired in initial public offering (in dollars per share)	$ 10
Term of loan				20 years
ESOP expense		$ 136,000	$ 258,000	$ 588,000	$ 834,000
ESOP | Prime rate
Employee Stock Ownership Plan
Variable interest rate				prime rate, as published in The Wall Street Journal

Employee Stock Ownership Plan_2

Employee Stock Ownership Plan - Nonqualified ESOP Restoration Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
ESOP restoration | Certain executives
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits
Accrued (reversed) benefits	$ 9,000	$ 23,000	$ (12,000)	$ 73,000

Share-Based Compensation - Plan

Share-Based Compensation - Plan Provisions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-Based Compensation
Compensation expense	$ 88	$ (18)	$ 90	$ 256
Income tax benefit	$ 24	$ (5)	$ 24	$ 70
2010 Equity Incentive Plan | Vesting period one
Share-Based Compensation
Vesting period			3 years
2019 Equity Incentive Plan
Share-Based Compensation
Shares remaining available for new awards under the 2019 Equity Plan	42,680		42,680

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock Awards (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
2019 Equity Incentive Plan
Unrecognized compensation
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	42,680
Restricted Stock
Restricted Stock Awards
Unvested at beginning of period (in shares)	23,664	23,208
Granted (in shares)	14,803	12,013
Vested (in shares)	12,729	11,557
Unvested at end of period (in shares)	25,738	23,664
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 24.15	$ 24.61
Granted (in dollars per share)	19.29	23.77
Vested (in dollars per share)	23.64	24.68
Unvested at end of period (in dollars per share)	$ 21.61	$ 24.15
Unrecognized compensation
Unrecognized compensation costs	$ 431,000
Restricted Stock Units Based on a Performance Condition
Restricted Stock Awards
Unvested at beginning of period (in shares)	43,557	41,583
Granted (in shares)	17,758	14,412
Vested (in shares)		7,670
Forfeited (in shares)	16,348	4,768
Unvested at end of period (in shares)	44,967	43,557
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 23.63	$ 24.68
Granted (in dollars per share)	19.29	23.77
Vested (in dollars per share)		27.30
Forfeited (in dollars per share)	21.05	27.30
Unvested at end of period (in dollars per share)	$ 22.85	$ 23.63
Unrecognized compensation
Unrecognized compensation costs, period of recognition	3 years
Restricted Stock Units Based on a Market Condition
Restricted Stock Awards
Unvested at beginning of period (in shares)	10,889	10,396
Granted (in shares)	4,443	3,603
Forfeited (in shares)	4,087	3,110
Unvested at end of period (in shares)	11,245	10,889
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 24.04	$ 24.03
Granted (in dollars per share)	17.95	24.42
Forfeited (in dollars per share)	22.16	24.45
Unvested at end of period (in dollars per share)	$ 22.31	$ 24.04
Unrecognized compensation
Unrecognized compensation costs	$ 75,000
Unrecognized compensation costs, period of recognition	3 years
Performance Based Restricted Stock Units (PRSUs)
Unrecognized compensation
Unrecognized compensation costs	$ 685,000
Unrecognized compensation costs, period of recognition	3 years

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share
Net income	$ 880	$ 3,891	$ 4,693	$ 12,711
Income allotted to participating securities	(15)	(23)	(44)	(70)
Net income available to common shareholders	$ 865	$ 3,868	$ 4,649	$ 12,641
Weighted-average number of shares used in:
Basic earnings per share (in shares)	8,577,632	8,802,010	8,656,915	8,885,626
Dilutive common stock equivalents:
Stock options and restricted stock units (in shares)	32,657	44,601	48,869	53,182
Diluted earnings per share (in shares)	8,610,289	8,846,611	8,705,784	8,938,808
Net income per common share, basic (in dollars per share)	$ 0.10	$ 0.44	$ 0.54	$ 1.42
Net income per common share, diluted (in dollars per share)	$ 0.10	$ 0.44	$ 0.53	$ 1.41

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Changes in Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	$ (250,634)	$ (255,905)	$ (256,550)	$ (256,322)
Other comprehensive (income) loss, net of taxes	780	1,114	757	1,991
Net current period other comprehensive (income) loss	780	1,114	757	1,991
Balances at end of period	(248,750)	(256,745)	(248,750)	(256,745)
Accumulated Other Comprehensive (Loss)/Income
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	7,721	6,401	7,744	5,524
Other comprehensive (income) loss, net of taxes	780	1,114
Net current period other comprehensive (income) loss	780	1,114	757	1,991
Balances at end of period	8,501	7,515	8,501	7,515
Unfunded Pension Liability
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	5,746	5,524	5,746	5,524
Balances at end of period	5,746	5,524	5,746	5,524
Unrealized (Gain) / Loss on Securities
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	1,975	877	1,998
Other comprehensive (income) loss, net of taxes	780	1,114	757	1,991
Net current period other comprehensive (income) loss	780	1,114	757	1,991
Balances at end of period	$ 2,755	$ 1,991	2,755	1,991
Other comprehensive (income) loss, net of taxes
Changes in the components of accumulated other comprehensive loss, net of taxes
Other comprehensive (income) loss, net of taxes			$ 757	$ 1,991

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss - Tax Effect on Each Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Tax effect on each component of other comprehensive loss
Pretax amount	$ 1,063	$ 1,519	$ 1,032	$ 2,714
Tax	(283)	(405)	(275)	(723)
After Tax Amount	780	1,114	757	1,991
Unrealized (Gain) / Loss on Securities
Tax effect on each component of other comprehensive loss
Pretax amount	1,063	1,519	1,032	2,714
Tax	(283)	(405)	(275)	(723)
After Tax Amount	$ 780	$ 1,114	$ 757	$ 1,991

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Revenue from contracts with customers	$ 281	$ 342	$ 1,002	$ 1,127
Other revenue	90	73	228	1,324
Total	371	415	1,230	2,451
Service and Other Fees
Revenues
Revenue from contracts with customers	265	304	917	989
Other revenue	33	35	105	103
Total	298	339	1,022	1,092
Other
Revenues
Revenue from contracts with customers	16	38	85	138
Other revenue	57	38	123	1,221
Total	$ 73	$ 76	$ 208	$ 1,359

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Lease costs:
Operating lease costs	$ 689	$ 712	$ 2,084	$ 2,211
Short-term lease costs	160	107	375	199
Variable lease costs	45	49	122	127
Total lease costs	894	868	2,581	2,537
Cash paid for amounts included in measurement of lease liabilities		854		2,381
Cash paid for amounts included in measurement of lease liabilities	(1,901)		(1,271)
ROU assets obtained in exchange for new operating lease liabilities	$ 84	$ 2,003	$ 590	$ 6,833

Leases - Future Minimum Rental

Leases - Future Minimum Rental Commitments Under Non-cancellable Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Future minimum rental commitments:
2023	$ 725
2024	2,818
2025	2,199
2026	2,038
2027	1,961
Thereafter	11,028
Total	20,769
Less lease incentives to be received in 2023	(1,273)
Less present value discount	(2,111)
Present value of leases	$ 17,385	$ 15,295

Leases - Other Related Informat

Leases - Other Related Information (Details)	Sep. 30, 2023	Sep. 30, 2022
Leases
Weighted-average remaining lease term (years)	9 years 8 months 19 days	9 years 10 days
Weighted-average discount rate	2.14%	2.04%

Fair Value - Estimated Fair Val

Fair Value - Estimated Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Investment securities available for sale, at fair value	$ 19,143	$ 20,821
Investment securities held to maturity	536,534	591,084
Carrying Amount
Assets
Cash and cash equivalents	89,112	40,553
Investment securities available for sale, at fair value	19,143	20,821
Investment securities held to maturity	695,641	717,773
Loans receivable, net	1,306,418	1,294,764
FHLB stock	12,844	8,197
FRB stock	3,177	3,170
Accrued interest receivable	6,131	6,115
Liabilities
Deposits	1,651,013	1,716,152
Advances from the Federal Home Loan Bank	256,000	141,000
Securities sold under agreements to repurchase	10,000	10,000
Accrued interest payable	1,476	701
Estimated Fair Value
Assets
Cash and cash equivalents	89,112	40,553
Investment securities available for sale, at fair value	19,143	20,821
Investment securities held to maturity	536,534	591,084
Loans receivable, net	1,037,090	1,180,840
FHLB stock	12,844	8,197
FRB stock	3,177	3,170
Accrued interest receivable	6,131	6,115
Liabilities
Deposits	1,645,726	1,708,612
Advances from the Federal Home Loan Bank	247,722	133,145
Securities sold under agreements to repurchase	9,568	9,440
Accrued interest payable	1,476	701
Estimated Fair Value | Level 1
Assets
Cash and cash equivalents	89,112	40,553
Accrued interest receivable	110	23
Estimated Fair Value | Level 2
Assets
Investment securities available for sale, at fair value	19,143	20,821
Investment securities held to maturity	536,534	591,084
FHLB stock	12,844	8,197
FRB stock	3,177	3,170
Accrued interest receivable	1,509	1,497
Liabilities
Deposits	1,124,546	1,286,465
Advances from the Federal Home Loan Bank	247,722	133,145
Securities sold under agreements to repurchase	9,568	9,440
Accrued interest payable	41	33
Estimated Fair Value | Level 3
Assets
Loans receivable, net	1,037,090	1,180,840
Accrued interest receivable	4,512	4,595
Liabilities
Deposits	521,180	422,147
Accrued interest payable	$ 1,435	$ 668

Fair Value - Recurring Basis (D

Fair Value - Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	$ 19,143	$ 20,821
Fair Value, Measurements, Recurring
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	19,143	20,821
Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	$ 19,143	$ 20,821

Fair Value - Nonrecurring Basis

Fair Value - Nonrecurring Basis (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Fair Value, Measurements, Nonrecurring
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares		3 Months Ended		9 Months Ended
	Oct. 27, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Subsequent Events
Quarterly cash dividend declared on common stock (in dollars per share)		$ 0.23	$ 0.23	$ 0.69	$ 0.69
Subsequent event
Subsequent Events
Quarterly cash dividend declared on common stock (in dollars per share)	$ 0.05