Territorial Bancorp (TBNK) 10-Q 12 Aug 24 2024 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Jul. 31, 2024
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2024
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		8,832,210
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001447051
Amendment Flag	false

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
ASSETS
Cash and cash equivalents	$ 82,782,000	$ 126,659,000
Investment securities available for sale, at fair value	19,095,000	20,171,000
Investment securities held to maturity, at amortized cost (fair value of $535,799 and $568,128 at June 30, 2024 and December 31, 2023, respectively)	666,103,000	685,728,000
Loans held for sale	312,000
Loans receivable	1,301,057,000	1,308,552,000
Allowance for credit losses	(5,118,000)	(5,121,000)
Loans receivable, net of allowance for credit losses	1,295,939,000	1,303,431,000
Federal Home Loan Bank stock, at cost	12,007,000	12,192,000
Federal Reserve Bank stock, at cost	3,185,000	3,180,000
Accrued interest receivable	6,039,000	6,105,000
Premises and equipment, net	7,133,000	7,185,000
Right-of-use asset, net	12,063,000	12,371,000
Bank-owned life insurance	49,133,000	48,638,000
Income taxes receivable	1,063,000	344,000
Deferred income tax assets, net	2,799,000	2,457,000
Prepaid expenses and other assets	7,760,000	8,211,000
Total assets	2,165,413,000	2,236,672,000
Liabilities:
Deposits	1,572,751,000	1,636,604,000
Advances from the Federal Home Loan Bank	237,000,000	242,000,000
Advances from the Federal Reserve Bank	50,000,000	50,000,000
Securities sold under agreements to repurchase	10,000,000	10,000,000
Accounts payable and accrued expenses	22,699,000	23,334,000
Lease liability	17,613,000	17,297,000
Advance payments by borrowers for taxes and insurance	6,183,000	6,351,000
Total liabilities	1,916,246,000	1,985,586,000
Commitments and contingencies: (Note 16)
Stockholders' Equity:
Preferred stock, $0.01 par value; authorized 50,000,000 shares, no shares issued or outstanding
Common stock, $0.01 par value; authorized 100,000,000 shares; issued and outstanding 8,832,210 and 8,826,613 shares at June 30, 2024 and December 31, 2023	88,000	88,000
Additional paid-in capital	48,105,000	48,022,000
Unearned ESOP shares	(2,203,000)	(2,447,000)
Retained earnings	209,909,000	211,644,000
Accumulated other comprehensive loss	(6,732,000)	(6,221,000)
Total stockholders' equity	249,167,000	251,086,000
Total liabilities and stockholders' equity	$ 2,165,413,000	$ 2,236,672,000

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Consolidated Balance Sheets (Unaudited)
Investment securities held to maturity, fair value	$ 535,799	$ 568,128
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	8,832,210	8,826,613
Common stock, shares outstanding	8,832,210	8,826,613

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest income:
Loans	$ 12,246	$ 11,697	$ 24,311	$ 23,151
Investment securities	4,257	4,525	8,570	9,065
Other investments	1,590	1,070	3,203	1,797
Total interest income	18,093	17,292	36,084	34,013
Interest expense:
Deposits	7,410	4,323	14,189	7,853
Advances from the Federal Home Loan Bank	1,806	1,832	3,616	2,886
Advances from the Federal Reserve Bank	594		1,189
Securities sold under agreements to repurchase	45	45	91	91
Total interest expense	9,855	6,200	19,085	10,830
Net interest income	8,238	11,092	16,999	23,183
(Reversal of provision) provision for credit losses	(26)	212	(7)	112
Net interest income after (reversal of provision) provision for credit losses	8,264	10,880	17,006	23,071
Noninterest income:
Service and other fees	339	414	612	724
Income on bank-owned life insurance	249	207	495	410
Net gain on sale of loans		9		10
Other	72	60	146	135
Total noninterest income	660	690	1,253	1,279
Noninterest expense:
Salaries and employee benefits	4,745	5,143	9,707	10,547
Occupancy	1,768	1,759	3,506	3,382
Equipment	1,329	1,303	2,652	2,615
Federal deposit insurance premiums	393	246	889	491
Other general and administrative expenses	1,749	1,059	3,290	2,088
Total noninterest expense	9,984	9,510	20,044	19,123
(Loss) income before income taxes	(1,060)	2,060	(1,785)	5,227
Income tax (benefit) expense	(285)	563	(528)	1,414
Net (loss) income	$ (775)	$ 1,497	$ (1,257)	$ 3,813
Basic (loss) earnings per share (in dollars per share)	$ (0.09)	$ 0.17	$ (0.15)	$ 0.44
Diluted (loss) earnings per share (in dollars per share)	(0.09)	0.17	(0.15)	0.43
Cash dividends declared per common share (in dollars per share)	$ 0.01	$ 0.23	$ 0.06	$ 0.46
Basic weighted-average shares outstanding (in shares)	8,605,801	8,620,643	8,596,969	8,697,213
Diluted weighted-average shares outstanding (in shares)	8,605,801	8,658,927	8,596,969	8,740,699

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Net Income (Loss)	$ (775)	$ 1,497	$ (1,257)	$ 3,813
Unrealized (loss) gain on securities	(115)	(314)	(511)	23
Total other comprehensive (loss) income, net of tax	(115)	(314)	(511)	23
Comprehensive (loss) income	$ (890)	$ 1,183	$ (1,768)	$ 3,836

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, 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 (Loss)				3,813		3,813
Other comprehensive (loss) income					23	23
Cumulative change in accounting principle (1)				(2,319)		(2,319)
Cash dividends declared				(3,960)		(3,960)
Share-based compensation		2				2
Share-based compensation (in shares)	12,729
Allocation of ESOP shares		207	245			452
Repurchase of shares of common stock	$ (3)	(3,924)				(3,927)
Repurchase of shares of common stock (in shares)	(235,294)
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
Balance at Mar. 31, 2023	$ 90	50,556	(2,814)	213,336	(7,407)	253,761
Balance (in shares) at Mar. 31, 2023	9,006,551
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)				1,497		1,497
Other comprehensive (loss) income					(314)	(314)
Cash dividends declared				(1,985)		(1,985)
Share-based compensation		44				44
Share-based compensation (in shares)	8,189
Allocation of ESOP shares		48	123			171
Repurchase of shares of common stock	$ (2)	(2,538)				(2,540)
Repurchase of shares of common stock (in shares)	(166,229)
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
Balance at Dec. 31, 2023	$ 88	48,022	(2,447)	211,644	(6,221)	251,086
Balance (in shares) at Dec. 31, 2023	8,826,613
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)				(1,257)		(1,257)
Other comprehensive (loss) income					(511)	(511)
Cash dividends declared				(478)		(478)
Share-based compensation		166				166
Share-based compensation (in shares)	12,178
Allocation of ESOP shares		(32)	244			212
Repurchase of shares of common stock		(51)				(51)
Repurchase of shares of common stock (in shares)	(6,556)
Cancelled shares (in shares)	(25)
Balance at Jun. 30, 2024	$ 88	48,105	(2,203)	209,909	(6,732)	249,167
Balance (in shares) at Jun. 30, 2024	8,832,210
Balance at Mar. 31, 2024	$ 88	48,098	(2,324)	210,771	(6,617)	250,016
Balance (in shares) at Mar. 31, 2024	8,826,613
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)				(775)		(775)
Other comprehensive (loss) income					(115)	(115)
Cash dividends declared				(87)		(87)
Share-based compensation		85				85
Share-based compensation (in shares)	12,178
Allocation of ESOP shares		(27)	121			94
Repurchase of shares of common stock		(51)				(51)
Repurchase of shares of common stock (in shares)	(6,556)
Cancelled shares (in shares)	(25)
Balance at Jun. 30, 2024	$ 88	$ 48,105	$ (2,203)	$ 209,909	$ (6,732)	$ 249,167
Balance (in shares) at Jun. 30, 2024	8,832,210

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Consolidated Statements of Stockholders' Equity, Share Data
Cash dividends declared per common share (in dollars per share)	$ 0.01	$ 0.23	$ 0.06	$ 0.46
Common Stock
Consolidated Statements of Stockholders' Equity, Share Data
Allocation of ESOP shares, shares	12,233	12,233	24,467	24,467

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net (loss) income	$ (1,257)	$ 3,813
Adjustments to reconcile net (loss) income to net cash (used in) from operating activities:
(Reversal of provision) provision for credit losses	(7)	112
Depreciation and amortization	482	574
Deferred income tax (benefit) expense	(157)	48
Accretion of fees, discounts, and premiums, net	(191)	(177)
Amortization of right-of-use asset	1,407	1,428
Origination of loans held for sale	(313)	(813)
Proceeds from sales of loans held for sale		823
Gain on sale of loans, net		(10)
ESOP expense	212	452
Share-based compensation expense	166	2
Net decrease in accrued interest receivable	83	81
Income on bank-owned life insurance	(495)	(410)
Net decrease (increase) in prepaid expenses and other assets	454	207
Net decrease in accounts payable and accrued expenses	(632)	(31)
Net decrease in lease liability	(783)	(480)
Net (decrease) increase in advance payments by borrowers for taxes and insurance	(168)	295
Net (decrease) increase in income taxes payable	(719)	662
Net cash (used in) from operating activities	(1,918)	6,576
Cash flows from investing activities:
Purchases of investment securities held to maturity		(6,693)
Principal repayments on investment securities held to maturity	19,665	18,931
Principal repayments on investment securities available for sale	403	423
Principal repayments on loans receivable, net of loan originations	7,608	(13,575)
Purchases of Federal Home Loan Bank stock	(40)	(5,887)
Proceeds from redemption of Federal Home Loan Bank stock	225	840
Purchases of Federal Reserve Bank stock	(5)	(7)
Proceeds from redemption of Federal Reserve Bank Stock		1
Purchases of premises and equipment	(431)	(236)
Net cash from (used in) investing activities	27,425	(6,203)
Cash flows from financing activities:
Net decrease in deposits	(63,853)	(70,441)
Proceeds from advances from the Federal Home Loan Bank		146,000
Repayments of advances from the Federal Home Loan Bank	(5,000)	(21,000)
Proceeds from advances from the Federal Reserve Bank	100,000
Repayments of advances from the Federal Reserve Bank	(100,000)
Repurchases of common stock		(3,805)
Cash dividends paid	(531)	(4,020)
Net cash (used in) financing activities	(69,384)	46,734
Net change in cash and cash equivalents	(43,877)	47,107
Cash and cash equivalents at beginning of the year	126,659	40,553
Cash and cash equivalents at end of the year	82,782	87,660
Cash paid for:
Interest on deposits and borrowings	18,610	10,664
Income taxes	348	705
Supplemental disclosure of noncash investing and financing activities:
Company stock repurchased through stock swap and net settlement transactions	51	121
Establishment of right-of-use asset, net of incentives and modifications	1,099	506
Establishment of lease liability, net of modifications	$ 1,099	$ 506

Organization

Organization	6 Months Ended
	Jun. 30, 2024
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 had

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2024
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, 2023. 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. 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. ​ Our loan portfolio is segmented into three pools for estimating our allowance for credit losses on loans: real estate, commercial, and consumer loans. They were established upon the adoption of Accounting Standards Update (ASU) 2016-13. Only three pools are used to segment our 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. Historically, we have disclosed information about our loans and allowance based on class of financing receivable. The portfolio segments align with the class of financing receivables as follows: ​ ● Real estate: One- to four-family residential, multi-family residential, and commercial mortgage ● Commercial: Commercial loans other than mortgage loans ● Consumer: Home equity loans, loans on deposit accounts, and all other consumer loans ​ Collateral dependent loans are not considered to share the same risk characteristics with the three pools discussed above. 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 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. Economic variables which have a strong correlation with our historical loan charge-offs, recoveries, and prepayments are utilized in forecasting 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. The forecast and reversion rate utilize historical behavior during select periods of time. Our real estate and consumer loan pools utilize a vintage approach where historical losses, recoveries, and prepayment experience is determined using loans that have originated within a specified period. Our commercial loans utilize a reporting period approach where historical losses, recoveries, and prepayment experience is considered during a selected historical period of time. Off-balance sheet forecasts utilize a reporting period approach. ​ Loans receivable are stated at amortized cost which includes the principal amount outstanding, less the allowance for credit losses, deferred loan origination fees and costs, commitment fees, and cumulative net charge-offs. Interest income on loans receivable is accrued as earned. Accrued interest receivable on loans was $4.6 million as of June 30, 2024 and December 31, 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. Under the CECL accounting standard, expected credit losses on these amounts are calculated using a forecasted estimate of the likelihood that funding of the unfunded amount/commitment will occur and the historical reversion rate. 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 Operations. There were no reserves for off-balance sheet credit exposures at June 30, 2024 or December 31, 2023. ​ 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, 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. ​ The Company is required to utilize the CECL methodology to estimate expected credit losses with respect to held-to-maturity (HTM) investment securities. Since all of the Company’s HTM investment securities were issued by U.S. government agencies or U.S. government-sponsored enterprises, which include the explicit and/or implicit guarantee of the U.S. government and have a long history of no credit losses, the Company has not recorded a credit loss on these securities. The unrealized losses on these securities were due to changes in interest rates, relative to when the securities were purchased, and are not due to decreases in the credit quality of the securities. ​ Available for sale (AFS) investment securities in an unrealized loss position are evaluated for impairment. The Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the investment securities amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the investment security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an ACL is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an ACL is recognized in other comprehensive income. The Company has t recorded an ACL related to our AFS investment securities. ​ Changes in the ACL are recorded as a provision (or reversal of provision) for credit losses. Losses are charged against the ACL when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met

Recently Issued and Adopted Acc

Recently Issued and Adopted Accounting Pronouncements	6 Months Ended
	Jun. 30, 2024
Recently Issued Accounting Pronouncements
Recently Issued Accounting Pronouncements	(3) Recently Issued and Adopted Accounting Pronouncements ​ In June 2022, the Financial Accounting Standards Board (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 also 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 was effective for fiscal years beginning after December 15, 2023. The Company adopted the standard on January 1, 2024, and it did not have a material effect on its consolidated financial statements. ​ In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the U.S. Securities and Exchange Commission’s (SEC) Disclosure Update and Simplification Initiative. The ASU is intended to clarify or improve disclosure and presentation requirements of a variety of topics. Many of the amendment will allow users to more easily compare entities subject to the SEC’s existing disclosures with those entities that were not previously subject to the requirements and align the requirements in the FASB Accounting Standard Codification with the SEC’s regulations. The Company is currently evaluating the effects that ASU 2023-06 will have on its consolidated financial statements. ​ In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU is intended to improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis to enable investors to develop more decision-useful financial analyses. This ASU will be effective for fiscal years beginning after December 31, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company does not expect the adoption of this ASU to have a material effect on its consolidated financial statements. ​ In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. This ASU will be effective for fiscal years beginning after December 15, 2024. The Company is currently evaluating the effects that ASU 2023-09 will have on its consolidated financial statements.

Cash and Cash Equivalents

Cash and Cash Equivalents	6 Months Ended
	Jun. 30, 2024
Cash and Cash Equivalents
Cash and Cash Equivalents	(4) Cash and Cash Equivalents ​ The table below presents the balances of cash and cash equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, (Dollars in thousands) 2024 2023 Cash and due from banks ​ $ 8,021 ​ $ 10,471 ​ ​ Interest-earning deposits in other banks ​ 74,761 ​ 116,188 ​ ​ Cash and cash equivalents ​ $ 82,782 ​ $ 126,659 ​ ​ ​ Interest-earning deposits in other banks consist primarily of deposits at the Federal Reserve Bank of San Francisco.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 22,184 ​ $ — $ (3,089) ​ $ 19,095 ​ $ — Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 666,103 ​ ​ 7 ​ (130,311) ​ ​ 535,799 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 688,287 ​ $ 7 $ (133,400) ​ $ 554,894 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 22,563 ​ $ — $ (2,392) ​ $ 20,171 ​ $ — Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 685,728 ​ ​ 68 ​ (117,668) ​ ​ 568,128 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 708,291 ​ $ 68 $ (120,060) ​ $ 588,299 ​ $ — ​ The amortized cost and estimated fair value of investment securities by maturity date at June 30, 2024 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 ​ $ 22,184 ​ $ 19,095 ​ Total ​ $ 22,184 ​ $ 19,095 ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ Due within 5 years ​ $ 12 ​ $ 12 ​ Due after 5 years through 10 years ​ 4 ​ 4 ​ Due after 10 years ​ 666,087 ​ 535,783 ​ Total ​ $ 666,103 ​ $ 535,799 ​ ​ The Company did not sell any held-to-maturity or available-for-sale securities during the six months ended June 30, 2024 and 2023. ​ Investment securities with amortized costs of $610.6 million and $555.8 million at June 30, 2024 and December 31, 2023, 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 $288.1 million and $74.0 million pledged to the Federal Reserve Bank’s discount window at June 30, 2024 and December 31, 2023, respectively, and $51.9 million and $202.1 million pledged to the Federal Reserve Bank’s Bank Term Funding Program at June 30, 2024 and December 31, 2023, respectively. ​ Provided below is a summary of investment securities which were in an unrealized loss position at June 30, 2024 and December 31, 2023. 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) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ — ​ $ — ​ $ 19,095 ​ $ (3,089) 4 ​ $ 19,095 ​ $ (3,089) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 476 ​ ​ (6) ​ ​ 532,700 ​ ​ (130,305) 154 ​ ​ 533,176 ​ ​ (130,311) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 476 ​ $ (6) ​ $ 551,795 ​ $ (133,394) ​ 158 ​ $ 552,271 ​ $ (133,400) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government sponsored enterprises ​ $ — ​ $ — ​ $ 20,171 ​ $ (2,392) 4 ​ $ 20,171 ​ $ (2,392) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 10,326 ​ ​ (107) ​ ​ 554,514 ​ ​ (117,561) 152 ​ ​ 564,840 ​ ​ (117,668) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 10,326 ​ $ (107) ​ $ 574,685 ​ $ (119,953) ​ 156 ​ $ 585,011 ​ $ (120,060) ​ ​ 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, no allowance for credit losses was recorded for these securities as of June 30, 2024 or December 31, 2023.

Loans Receivable and Allowance

Loans Receivable and Allowance for Credit Losses	6 Months Ended
	Jun. 30, 2024
Loans Receivable and Allowance for Credit Losses
Loans Receivable and Allowance for Credit Losses	(6) Loans Receivable and Allowance for Credit Losses ​ The components of loans receivable, net of allowance for credit losses (ACL) as of June 30, 2024 and December 31, 2023 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ ​ (Dollars in thousands) 2024 2023 ​ Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ First mortgages: ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential ​ $ 1,265,288 ​ $ 1,277,544 ​ ​ Multi-family residential ​ 5,488 ​ 5,855 ​ ​ Construction, commercial, and other ​ 12,518 ​ 11,631 ​ ​ Home equity loans and lines of credit ​ 11,109 ​ 7,058 ​ ​ Total real estate loans ​ 1,294,403 ​ 1,302,088 ​ ​ Other loans: ​ ​ ​ ​ ​ ​ ​ ​ Loans on deposit accounts ​ 185 ​ 196 ​ ​ Consumer and other loans ​ 8,452 ​ 8,257 ​ ​ Total other loans ​ ​ 8,637 ​ ​ 8,453 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 1,303,040 ​ 1,310,541 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net unearned fees and discounts ​ (1,983) ​ (1,989) ​ ​ Total loans, net of unearned fees and discounts ​ 1,301,057 ​ 1,308,552 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses ​ (5,118) ​ (5,121) ​ ​ Loans receivable, net of allowance for credit losses ​ $ 1,295,939 ​ $ 1,303,431 ​ ​ ​ The table below presents the activity in the allowance for credit losses by portfolio segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate Commercial Consumer ​ (Dollars in thousands) Loans Loans Loans ​ Totals Three months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,483 ​ $ 526 ​ $ 133 ​ $ 5,142 (Reversal of provision) provision for credit losses ​ (63) ​ ​ 3 ​ ​ 34 ​ ​ (26) ​ ​ 4,420 ​ 529 ​ 167 ​ 5,116 Charge-offs ​ (3) ​ ​ — ​ ​ (14) ​ ​ (17) Recoveries ​ 13 ​ ​ — ​ ​ 6 ​ ​ 19 Net recoveries (charge-offs) ​ 10 ​ — ​ (8) ​ 2 Balance, end of period ​ $ 4,430 ​ $ 529 ​ $ 159 ​ $ 5,118 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,502 ​ $ 514 ​ $ 105 ​ $ 5,121 (Reversal of provision) provision for credit losses ​ (89) ​ ​ 15 ​ ​ 67 ​ ​ (7) ​ ​ 4,413 ​ 529 ​ 172 ​ 5,114 Charge-offs ​ (5) ​ — ​ (20) ​ (25) Recoveries ​ 22 ​ — ​ 7 ​ 29 Net recoveries (charge-offs) ​ 17 ​ — ​ (13) ​ 4 Balance, end of period ​ $ 4,430 ​ $ 529 ​ $ 159 ​ $ 5,118 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate Commercial Consumer (Dollars in thousands) Loans Loans Loans Unallocated Totals Three months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,629 ​ $ 417 ​ $ 81 ​ $ — ​ $ 5,127 Provision for credit losses ​ 172 ​ 19 ​ 21 ​ — ​ 212 ​ ​ 4,801 ​ 436 ​ 102 ​ — ​ 5,339 Charge-offs ​ (67) ​ (15) ​ — ​ — ​ (82) Recoveries ​ — ​ 5 ​ — ​ — ​ 5 Net charge-offs ​ (67) ​ (10) ​ — ​ — ​ (77) Balance, end of period ​ $ 4,734 ​ $ 426 ​ $ 102 ​ $ — ​ $ 5,262 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 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 Provision (reversal of provision) for credit losses ​ 145 ​ (69) ​ 36 ​ — ​ 112 ​ ​ 4,801 ​ 436 ​ 116 ​ — ​ 5,353 Charge-offs ​ (67) ​ (15) ​ (15) ​ — ​ (97) Recoveries ​ — ​ 5 ​ 1 ​ — ​ 6 Net charge-offs ​ (67) ​ (10) ​ (14) ​ — ​ (91) Balance, end of period ​ $ 4,734 ​ $ 426 ​ $ 102 ​ $ — ​ $ 5,262 ​ The reversal of provision for credit losses in the three and six months ended June 30, 2024 was primarily due to a decrease in the loans in the real estate portfolio which was partially offset by an increase in loans in the consumer loan portfolio. The provision for credit losses in the three and six months ended June 30, 2023 was primarily due to a decrease in forecasted prepayments and recoveries in the real estate portfolio which increased estimated future losses on real estate loans. 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 June 30, 2024. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving Loans ​ ​ ​ ​ Amortized Cost of Term Loans by Origination Year ​ Amortized ​ ​ ​ (Dollars in thousands) ​ 2024 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ Prior ​ Cost Basis ​ Total June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 325 ​ ​ 592 ​ ​ 319 ​ ​ 4,757 ​ ​ — ​ ​ 966 ​ ​ 1,187 ​ ​ 8,146 Total Commercial ​ ​ 325 ​ ​ 592 ​ ​ 319 ​ ​ 4,757 ​ ​ — ​ ​ 966 ​ ​ 1,187 ​ ​ 8,146 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ 2 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 177 ​ ​ 46 ​ ​ 62 ​ ​ 12 ​ ​ 2 ​ ​ 48 ​ ​ 10,258 ​ ​ 10,605 Total Consumer ​ ​ 178 ​ ​ 46 ​ ​ 62 ​ ​ 12 ​ ​ 2 ​ ​ 48 ​ ​ 10,259 ​ ​ 10,607 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ — ​ ​ — ​ ​ 152 ​ ​ — ​ ​ — ​ ​ 255 ​ ​ — ​ ​ 407 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 87 ​ ​ — ​ ​ 87 Loans not past due ​ ​ 26,546 ​ ​ 90,431 ​ ​ 126,721 ​ ​ 277,511 ​ ​ 179,258 ​ ​ 581,343 ​ ​ — ​ ​ 1,281,810 Total Real Estate ​ ​ 26,546 ​ ​ 90,431 ​ ​ 126,873 ​ ​ 277,511 ​ ​ 179,258 ​ ​ 581,685 ​ ​ — ​ ​ 1,282,304 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 27,049 ​ $ 91,069 ​ $ 127,254 ​ $ 282,280 ​ $ 179,260 ​ $ 582,699 ​ $ 11,446 ​ $ 1,301,057 ​ The Company did not have any revolving loans that converted to term loans during the six months ended June 30, 2024. ​ 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 December 31, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving Loans ​ ​ ​ ​ Amortized Cost of Term Loans by Origination Year ​ Amortized ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Cost Basis ​ Total December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 387 ​ ​ 353 ​ ​ 4,836 ​ ​ — ​ ​ 203 ​ ​ 856 ​ ​ 1,230 ​ ​ 7,865 Total Commercial ​ ​ 387 ​ ​ 353 ​ ​ 4,836 ​ ​ — ​ ​ 203 ​ ​ 856 ​ ​ 1,230 ​ ​ 7,865 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ 4 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 4 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 271 ​ ​ 80 ​ ​ 20 ​ ​ 4 ​ ​ 14 ​ ​ 42 ​ ​ 6,137 ​ ​ 6,568 Total Consumer ​ ​ 275 ​ ​ 80 ​ ​ 20 ​ ​ 4 ​ ​ 14 ​ ​ 42 ​ ​ 6,137 ​ ​ 6,572 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 428 ​ ​ — ​ ​ 428 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 140 ​ ​ 87 ​ ​ — ​ ​ 227 Loans not past due ​ ​ 91,195 ​ ​ 129,148 ​ ​ 283,571 ​ ​ 183,887 ​ ​ 91,113 ​ ​ 514,546 ​ ​ — ​ ​ 1,293,460 Total Real Estate ​ ​ 91,195 ​ ​ 129,148 ​ ​ 283,571 ​ ​ 183,887 ​ ​ 91,253 ​ ​ 515,061 ​ ​ — ​ ​ 1,294,115 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 91,857 ​ $ 129,581 ​ $ 288,427 ​ $ 183,891 ​ $ 91,470 ​ $ 515,959 ​ $ 7,367 ​ $ 1,308,552 ​ The Company did not have any revolving loans that converted to term loans during the year ended December 31, 2023. ​ The following table presents by loan class and year of origination, the gross charge-offs recorded during the three and six months ended June 30, 2024 and 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2024 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ Prior ​ Total Three months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 3 ​ $ 3 Loans on deposit accounts ​ ​ 14 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 14 Total ​ $ 14 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 3 ​ $ 17 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 5 ​ $ 5 Loans on deposit accounts ​ ​ 14 ​ ​ 3 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 17 Consumer and other ​ ​ — ​ ​ 2 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ 3 Total ​ $ 14 ​ $ 5 ​ $ — ​ $ — ​ $ — ​ $ 6 ​ $ 25 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Total Three months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 10 ​ $ 57 ​ $ 67 Consumer and other ​ ​ 12 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ — ​ ​ 15 Total ​ $ 12 ​ $ — ​ $ — ​ $ — ​ $ 13 ​ $ 57 ​ $ 82 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 10 ​ $ 57 ​ $ 67 Consumer and other ​ ​ 27 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ — ​ ​ 30 Total ​ $ 27 ​ $ — ​ $ — ​ $ — ​ $ 13 ​ $ 57 ​ $ 97 ​ 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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 407 ​ $ — ​ $ 87 ​ $ 494 ​ $ 1,262,864 ​ $ 1,263,358 ​ $ 1,063 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,482 ​ 5,482 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 12,465 ​ 12,465 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 11,111 ​ 11,111 ​ 6 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 185 ​ 185 ​ — ​ — ​ Consumer and other ​ 2 ​ — ​ — ​ 2 ​ 8,454 ​ 8,456 ​ 166 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 409 ​ $ — ​ $ 87 ​ $ 496 ​ $ 1,300,561 ​ $ 1,301,057 ​ $ 1,235 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 428 ​ $ — ​ $ 227 ​ $ 655 ​ $ 1,274,960 ​ $ 1,275,615 ​ $ 2,079 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,848 ​ 5,848 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 11,570 ​ 11,570 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,060 ​ 7,060 ​ 11 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 196 ​ 196 ​ — ​ — ​ Consumer and other ​ 4 ​ — ​ — ​ 4 ​ 8,259 ​ 8,263 ​ 170 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 432 ​ $ — ​ $ 227 ​ $ 659 ​ $ 1,307,893 ​ $ 1,308,552 ​ $ 2,260 ​ $ — ​ ​ ​ The table below presents the amortized cost basis of loans on nonaccrual status as of June 30, 2024 and December 31, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Nonaccrual Loans With a Related ACL Nonaccrual Loans Without a Related ACL Total Nonaccrual Loans June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 948 ​ $ 115 ​ $ 1,063 Home equity loans and lines of credit ​ ​ 6 ​ ​ — ​ ​ 6 Consumer and other ​ ​ 166 ​ ​ — ​ ​ 166 Total Nonaccrual Loans and Leases ​ $ 1,120 ​ $ 115 ​ $ 1,235 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 1,030 ​ $ 1,049 ​ $ 2,079 Home equity loans and lines of credit ​ ​ 11 ​ ​ — ​ ​ 11 Consumer and other ​ ​ 170 ​ ​ — ​ ​ 170 Total Nonaccrual Loans and Leases ​ $ 1,211 ​ $ 1,049 ​ $ 2,260 ​ 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 $87,000 and $227,000 at June 30, 2024 and December 31, 2023, respectively. These loans were collateralized by residential real estate in Hawaii. As of June 30, 2024 and December 31, 2023, 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. ​ The Company had no real estate owned as of June 30, 2024 or December 31, 2023. There was in the process of foreclosure at June 30, 2024. 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 six months ended June 30, 2023, the Company sold mortgage loans held for sale with principal balances of $827,000 and recognized a gain of $10,000 . The Company did not sell any mortgage loans in the six months ended June 30, 2024. The Company had ​ The Company serviced loans for others with principal balances of $32.1 million at June 30, 2024 and $33.2 million at December 31, 2023. Of these amounts, million of loan balances relate to securitizations for which the Company continues to hold the related mortgage-backed securities at June 30, 2024 and December 31, 2023, respectively. The amount of contractually specified servicing fees earned for the three months ended June 30, 2024 and 2023 was , respectively. The amount of contractually specified servicing fees earned for the six months ended June 30, 2024 and 2023 was , respectively. The fees are reported in service and other fees in the Consolidated Statements of Operations.

Advances from the Federal Home

Advances from the Federal Home Loan Bank	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024 and December 31, 2023, 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 $593.5 million and $612.6 million, respectively. ​ Advances outstanding consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024 ​ December 31, 2023 Weighted ​ Weighted Average ​ Average (Dollars in thousands) Amount Rate Amount Rate Due within one year ​ $ 92,000 1.74 % ​ $ 82,000 1.40 % Due over 1 year to 2 years ​ 40,000 2.41 ​ ​ 45,000 2.87 ​ Due over 2 years to 3 years ​ 30,000 4.28 ​ ​ 20,000 3.20 ​ Due over 3 years to 4 years ​ ​ 70,000 ​ 4.32 ​ ​ ​ 30,000 ​ 4.24 ​ Due over 4 years to 5 years ​ ​ 5,000 ​ 4.38 ​ ​ ​ 60,000 ​ 4.32 ​ Due over 5 years to 6 years ​ — — ​ ​ 5,000 4.38 ​ Total ​ $ 237,000 2.99 % ​ $ 242,000 2.96 % ​

Advances from the Federal Reser

Advances from the Federal Reserve Bank	6 Months Ended
	Jun. 30, 2024
Federal Home Loan Bank Stock and Federal Reserve Bank Stock [Abstract]
Advances from the Federal Reserve Bank	​ In March 2023, the FRB created a new Bank Term Funding Program (BTFP) to make additional funding available to eligible depository institutions. The BTFP ceased making new loans on March 11, 2024. This program offered loans up to a one year term that can be prepaid without penalty. The amount that could be borrowed was based upon the par value of the securities pledged as collateral to the FRB. ​ Advances outstanding consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024 ​ December 31, 2023 Weighted ​ Weighted Average ​ Average (Dollars in thousands) Amount Rate Amount Rate Due within one year ​ $ 50,000 4.76 % ​ $ 50,000 4.89 % Total ​ $ 50,000 ​ 4.76 % ​ $ 50,000 ​ 4.89 % ​

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	6 Months Ended
	Jun. 30, 2024
Securities Sold Under Agreements to Repurchase
Securities Sold Under Agreements to Repurchase	(9) 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: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024 ​ December 31, 2023 ​ Weighted ​ Weighted ​ Repurchase Average ​ Repurchase Average ​ (Dollars in thousands) Liability Rate Liability Rate ​ Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1 year or less ​ $ 10,000 1.81 % ​ $ 5,000 1.88 % ​ Over 1 year to 2 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 June 30, 2024. 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 ​ $ 13,764 ​ $ 11,475 ​ $ 10,000 ​ $ 3,764 6 ​ ​

Offsetting of Financial Liabili

Offsetting of Financial Liabilities	6 Months Ended
	Jun. 30, 2024
Offsetting of Financial Liabilities
Offsetting of Financial Liabilities	(10) Offsetting of Financial Liabilities ​ Securities sold under agreements to repurchase are subject to a right of offset in the event of default. See Note 9, 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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​

Employee Stock Ownership Plan

Employee Stock Ownership Plan	6 Months Ended
	Jun. 30, 2024
Employee Stock Ownership Plan
Employee Stock Ownership Plan
Employee Stock Ownership Plan	(11) 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 June 30, 2024 and 2023 amounted to , respectively. Compensation expense recognized for the six months ended June 30, 2024 and 2023 amounted to ​ Shares held by the ESOP trust were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, 2024 2023 Allocated shares ​ 644,405 ​ 619,938 ​ ​ Unearned shares ​ 220,198 ​ 244,665 ​ ​ Total ESOP shares ​ 864,603 ​ 864,603 ​ ​ Fair value of unearned shares, in thousands ​ $ 1,784 ​ $ 2,728 ​ ​ ​ 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 months ended June 30, 2024 and 2023, we reversed ​

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2024
2010 Equity Incentive Plan
Share-Based Compensation
Share-Based Compensation	(12) 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 4,949 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 Operations 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 Six Months Ended June 30, June 30, (Dollars in thousands) 2024 2023 2024 2023 Compensation expense ​ $ 85 ​ $ 44 ​ $ 166 ​ $ 2 ​ Income tax benefit ​ 23 ​ 12 ​ 45 ​ 1 ​ ​ 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, 2023 25,738 ​ $ 21.61 ​ Granted 26,664 ​ 7.03 ​ Vested 12,178 ​ 22.83 ​ Forfeited — ​ — ​ Unvested at June 30, 2024 40,224 ​ $ 11.57 ​ ​ ​ ​ ​ ​ ​ ​ Unvested at December 31, 2022 23,664 ​ $ 24.15 ​ Granted 14,803 ​ 19.29 ​ Vested 12,729 ​ 23.64 ​ Forfeited — ​ — ​ Unvested at June 30, 2023 25,738 ​ $ 21.61 ​ ​ As of June 30, 2024, the Company had $414,000 of unrecognized compensation costs related to time-based restricted stock. ​ The table below presents the 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, 2023 44,967 ​ $ 22.85 Granted 31,995 ​ 7.03 Vested — ​ — Forfeited 12,797 ​ 26.77 Unvested at June 30, 2024 64,165 ​ $ 14.18 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2022 43,557 ​ $ 23.63 Granted 17,758 ​ 19.29 Vested — ​ — Forfeited 16,348 ​ 21.05 Unvested at June 30, 2023 44,967 ​ $ 22.85 ​ The fair value of these PRSUs is based on the fair value of the Company’s stock on the date of grant. As of June 30, 2024, the Company had $139,000 of unrecognized compensation costs related to the newly granted PRSUs. Additional compensation expense up to $457,000 may be recognized in the future if achievement of the performance condition becomes probable for previously issued grants. 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, 2023 11,245 ​ $ 22.31 Granted 8,000 ​ ​ 5.55 Vested — ​ — Forfeited 3,199 ​ 26.00 Unvested at June 30, 2024 16,046 ​ $ 13.22 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2022 10,889 ​ $ 24.04 Granted 4,443 ​ ​ 17.95 Vested — ​ — Forfeited 4,087 ​ 22.16 Unvested at June 30, 2023 11,245 ​ $ 22.31 ​ As of June 30, 2024, the Company had $67,000 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	6 Months Ended
	Jun. 30, 2024
Earnings Per Share
Earnings Per Share	(13) 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 Six Months Ended June 30, June 30, (Dollars in thousands, except per share data) 2024 2023 2024 2023 Net (loss) income ​ $ (775) ​ $ 1,497 ​ $ (1,257) ​ $ 3,813 ​ Income allocated to participating securities ​ ​ — ​ ​ (9) ​ ​ — ​ ​ (28) ​ Net (loss) income available to common shareholders ​ $ (775) ​ $ 1,488 ​ $ (1,257) ​ $ 3,785 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average number of shares used in: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per share ​ 8,605,801 ​ 8,620,643 ​ 8,596,969 ​ 8,697,213 ​ Dilutive common stock equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options and restricted stock units ​ — ​ 38,284 ​ — ​ 43,486 ​ Diluted earnings per share ​ 8,605,801 ​ 8,658,927 ​ 8,596,969 ​ 8,740,699 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net (loss) income per common share, basic ​ $ (0.09) ​ $ 0.17 ​ $ (0.15) ​ $ 0.44 ​ Net (loss) income per common share, diluted ​ $ (0.09) ​ $ 0.17 ​ $ (0.15) ​ $ 0.43 ​ ​ Dilutive common stock equivalents were not included in calculating the net loss per share for the three months and six months ended June 30, 2024 because these equivalents are anti-dilutive. ​

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	6 Months Ended
	Jun. 30, 2024
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss	(14) 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 June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 4,466 ​ $ 2,151 ​ $ 6,617 ​ Other comprehensive loss, net of taxes ​ ​ — ​ 115 ​ 115 ​ Net current period other comprehensive loss ​ — ​ 115 ​ 115 ​ Balances at end of period ​ $ 4,466 ​ $ 2,266 ​ $ 6,732 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,661 ​ $ 7,407 ​ Other comprehensive loss, net of taxes ​ — ​ 314 ​ 314 ​ Net current period other comprehensive loss ​ — ​ 314 ​ 314 ​ Balances at end of period ​ $ 5,746 ​ $ 1,975 ​ $ 7,721 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 4,466 ​ $ 1,755 ​ $ 6,221 ​ Other comprehensive loss, net of taxes ​ — ​ 511 ​ 511 ​ Net current period other comprehensive loss ​ — ​ 511 ​ 511 ​ Balances at end of period ​ $ 4,466 ​ $ 2,266 ​ $ 6,732 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,998 ​ $ 7,744 ​ Other comprehensive income, net of taxes ​ ​ — ​ ​ (23) ​ ​ (23) ​ Net current period other comprehensive income ​ — ​ (23) ​ (23) ​ Balances at end of period ​ $ 5,746 ​ $ 1,975 ​ $ 7,721 ​ ​ The table below presents the tax effect on each component of accumulated other comprehensive loss: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended June 30, 2024 2023 Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 157 ​ $ (42) ​ $ 115 ​ $ 428 ​ $ (114) ​ $ 314 ​ Total ​ $ 157 ​ $ (42) ​ $ 115 ​ $ 428 ​ $ (114) ​ $ 314 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended June 30, ​ 2024 2023 ​ Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss (gain) on securities ​ $ 697 ​ $ (186) ​ $ 511 ​ $ (31) ​ $ 8 ​ $ (23) ​ Total ​ $ 697 ​ $ (186) ​ $ 511 ​ $ (31) ​ $ 8 ​ $ (23) ​ ​ ​

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2024
Revenue Recognition
Revenue Recognition	​ (15) 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 Operations. 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 June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 306 ​ $ 37 ​ $ 343 Other revenue ​ ​ 33 ​ ​ 35 ​ ​ 68 Total ​ $ 339 ​ $ 72 ​ $ 411 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 377 ​ $ 27 ​ $ 404 Other revenue ​ ​ 37 ​ ​ 33 ​ ​ 70 Total ​ $ 414 ​ $ 60 ​ $ 474 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 546 ​ $ 77 ​ $ 623 Other revenue ​ ​ 66 ​ ​ 69 ​ ​ 135 Total ​ $ 612 ​ $ 146 ​ $ 758 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 652 ​ $ 69 ​ $ 721 Other revenue ​ ​ 72 ​ ​ 66 ​ ​ 138 Total ​ $ 724 ​ $ 135 ​ $ 859 ​

Leases

Leases	6 Months Ended
	Jun. 30, 2024
Leases
Leases	​ (16) Leases ​ The table below presents lease costs and other information for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Six Months Ended ​ June 30, June 30, (Dollars in thousands) 2024 2023 2024 2023 Lease costs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease costs ​ $ 723 ​ $ 690 ​ $ 1,389 ​ $ 1,395 ​ Short-term lease costs ​ 131 ​ 111 ​ 294 ​ 215 ​ Variable lease costs ​ 36 ​ 34 ​ 79 ​ 77 ​ Total lease costs ​ $ 890 ​ $ 835 ​ $ 1,762 ​ $ 1,687 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash paid for amounts included in measurement of lease liabilities ​ $ 779 ​ $ (139) ​ $ 974 ​ $ 630 ​ ROU assets obtained in exchange for new operating lease liabilities ​ $ 695 ​ $ 388 ​ $ 1,099 ​ $ 506 ​ ​ Future minimum rental commitments under noncancellable operating leases are as follows: ​ ​ ​ ​ ​ ​ ​ June 30, (Dollars in thousands) 2024 2024 ​ $ 1,477 2025 ​ 2,378 2026 ​ 2,224 2027 ​ 2,155 2028 ​ 1,902 Thereafter ​ 9,422 Total ​ ​ 19,558 ​ ​ ​ ​ Less present value discount ​ ​ (1,945) Present value of leases ​ $ 17,613 ​ The table below presents additional lease-related information: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ ​ June 30, ​ ​ ​ 2024 ​ 2023 ​ Weighted-average remaining lease term (years) ​ 9.57 ​ ​ 8.99 ​ ​ Weighted-average discount rate ​ ​ 2.22 % ​ ​ 2.14 % ​ ​

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2024
Fair Value
Fair Value	(17) 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 June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 82,782 ​ $ 82,782 ​ $ 82,782 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 19,095 ​ ​ 19,095 ​ ​ — ​ ​ 19,095 ​ ​ — ​ Investment securities held to maturity ​ 666,103 ​ ​ 535,799 ​ ​ — ​ ​ 535,799 ​ ​ — ​ Loans held for sale ​ 312 ​ ​ 319 ​ ​ — ​ ​ 319 ​ ​ — ​ Loans receivable, net ​ 1,301,057 ​ ​ 1,082,564 ​ ​ — ​ ​ — ​ ​ 1,082,564 ​ FHLB stock ​ 12,007 ​ ​ 12,007 ​ ​ — ​ ​ 12,007 ​ ​ — ​ FRB stock ​ ​ 3,185 ​ ​ 3,185 ​ ​ — ​ ​ 3,185 ​ ​ — ​ Accrued interest receivable ​ 6,039 ​ ​ 6,039 ​ ​ 61 ​ ​ 1,396 ​ ​ 4,582 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,572,751 ​ ​ 1,569,681 ​ ​ — ​ ​ 1,040,743 ​ ​ 528,938 ​ Advances from the Federal Home Loan Bank ​ 237,000 ​ ​ 233,922 ​ ​ — ​ ​ 233,922 ​ ​ — ​ Advances from the Federal Reserve Bank ​ ​ 50,000 ​ ​ 49,850 ​ ​ — ​ ​ 49,850 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,837 ​ ​ — ​ ​ 9,837 ​ ​ — ​ Accrued interest payable ​ 1,625 ​ ​ 1,625 ​ ​ — ​ ​ 1,105 ​ ​ 520 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 126,659 ​ $ 126,659 ​ $ 126,659 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 20,171 ​ ​ 20,171 ​ ​ — ​ ​ 20,171 ​ ​ — ​ Investment securities held to maturity ​ 685,728 ​ ​ 568,128 ​ ​ — ​ ​ 568,128 ​ ​ — ​ Loans receivable, net ​ 1,303,431 ​ ​ 1,120,704 ​ ​ — ​ ​ — ​ ​ 1,120,704 ​ FHLB stock ​ 12,192 ​ ​ 12,192 ​ ​ — ​ ​ 12,192 ​ ​ — ​ FRB stock ​ ​ 3,180 ​ ​ 3,180 ​ ​ — ​ ​ 3,180 ​ ​ — ​ Accrued interest receivable ​ 6,105 ​ ​ 6,105 ​ ​ 79 ​ ​ 1,441 ​ ​ 4,585 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,636,604 ​ ​ 1,633,164 ​ ​ — ​ ​ 1,104,171 ​ ​ 528,993 ​ Advances from the Federal Home Loan Bank ​ 242,000 ​ ​ 238,380 ​ ​ — ​ ​ 238,380 ​ ​ — ​ Advances from the Federal Reserve Bank ​ ​ 50,000 ​ ​ 50,049 ​ ​ — ​ ​ 50,049 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,700 ​ ​ — ​ ​ 9,700 ​ ​ — ​ Accrued interest payable ​ 1,183 ​ ​ 1,183 ​ ​ — ​ ​ 157 ​ ​ 1,026 ​ ​ At June 30, 2024 and December 31, 2023, 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 June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 19,095 ​ $ — ​ $ 19,095 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 20,171 ​ $ — ​ $ 20,171 ​ ​ There were no assets or liabilities measured at fair value on a nonrecurring basis as of June 30, 2024 or December 31, 2023.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2024
Subsequent Events
Subsequent Events	(18) Subsequent Events ​ On July 26, 2024 , the Board of Directors of Territorial Bancorp Inc. declared a quarterly cash dividend of $0.01 per share of common stock. The dividend is expected to be paid on August 23, 2024 to stockholders of record as of August 9, 2024 . ​

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ (775)	$ 1,497	$ (1,257)	$ 3,813

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2024
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, 2023. 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 Credit Losses (ACL) on Loans and Securities	(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. 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. ​ Our loan portfolio is segmented into three pools for estimating our allowance for credit losses on loans: real estate, commercial, and consumer loans. They were established upon the adoption of Accounting Standards Update (ASU) 2016-13. Only three pools are used to segment our 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. Historically, we have disclosed information about our loans and allowance based on class of financing receivable. The portfolio segments align with the class of financing receivables as follows: ​ ● Real estate: One- to four-family residential, multi-family residential, and commercial mortgage ● Commercial: Commercial loans other than mortgage loans ● Consumer: Home equity loans, loans on deposit accounts, and all other consumer loans ​ Collateral dependent loans are not considered to share the same risk characteristics with the three pools discussed above. 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 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. Economic variables which have a strong correlation with our historical loan charge-offs, recoveries, and prepayments are utilized in forecasting 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. The forecast and reversion rate utilize historical behavior during select periods of time. Our real estate and consumer loan pools utilize a vintage approach where historical losses, recoveries, and prepayment experience is determined using loans that have originated within a specified period. Our commercial loans utilize a reporting period approach where historical losses, recoveries, and prepayment experience is considered during a selected historical period of time. Off-balance sheet forecasts utilize a reporting period approach. ​ Loans receivable are stated at amortized cost which includes the principal amount outstanding, less the allowance for credit losses, deferred loan origination fees and costs, commitment fees, and cumulative net charge-offs. Interest income on loans receivable is accrued as earned. Accrued interest receivable on loans was $4.6 million as of June 30, 2024 and December 31, 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. Under the CECL accounting standard, expected credit losses on these amounts are calculated using a forecasted estimate of the likelihood that funding of the unfunded amount/commitment will occur and the historical reversion rate. 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 Operations. There were no reserves for off-balance sheet credit exposures at June 30, 2024 or December 31, 2023. ​ 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, 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. ​ The Company is required to utilize the CECL methodology to estimate expected credit losses with respect to held-to-maturity (HTM) investment securities. Since all of the Company’s HTM investment securities were issued by U.S. government agencies or U.S. government-sponsored enterprises, which include the explicit and/or implicit guarantee of the U.S. government and have a long history of no credit losses, the Company has not recorded a credit loss on these securities. The unrealized losses on these securities were due to changes in interest rates, relative to when the securities were purchased, and are not due to decreases in the credit quality of the securities. ​ Available for sale (AFS) investment securities in an unrealized loss position are evaluated for impairment. The Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the investment securities amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the investment security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an ACL is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an ACL is recognized in other comprehensive income. The Company has t recorded an ACL related to our AFS investment securities. ​ Changes in the ACL are recorded as a provision (or reversal of provision) for credit losses. Losses are charged against the ACL when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	6 Months Ended
	Jun. 30, 2024
Cash and Cash Equivalents
Schedule of balances of cash and cash equivalents	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, (Dollars in thousands) 2024 2023 Cash and due from banks ​ $ 8,021 ​ $ 10,471 ​ ​ Interest-earning deposits in other banks ​ 74,761 ​ 116,188 ​ ​ Cash and cash equivalents ​ $ 82,782 ​ $ 126,659 ​ ​

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 22,184 ​ $ — $ (3,089) ​ $ 19,095 ​ $ — Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 666,103 ​ ​ 7 ​ (130,311) ​ ​ 535,799 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 688,287 ​ $ 7 $ (133,400) ​ $ 554,894 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ 22,563 ​ $ — $ (2,392) ​ $ 20,171 ​ $ — Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 685,728 ​ ​ 68 ​ (117,668) ​ ​ 568,128 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 708,291 ​ $ 68 $ (120,060) ​ $ 588,299 ​ $ — ​
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 ​ $ 22,184 ​ $ 19,095 ​ Total ​ $ 22,184 ​ $ 19,095 ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ Due within 5 years ​ $ 12 ​ $ 12 ​ Due after 5 years through 10 years ​ 4 ​ 4 ​ Due after 10 years ​ 666,087 ​ 535,783 ​ Total ​ $ 666,103 ​ $ 535,799 ​
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) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government-sponsored enterprises ​ $ — ​ $ — ​ $ 19,095 ​ $ (3,089) 4 ​ $ 19,095 ​ $ (3,089) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 476 ​ ​ (6) ​ ​ 532,700 ​ ​ (130,305) 154 ​ ​ 533,176 ​ ​ (130,311) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 476 ​ $ (6) ​ $ 551,795 ​ $ (133,394) ​ 158 ​ $ 552,271 ​ $ (133,400) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government sponsored enterprises ​ $ — ​ $ — ​ $ 20,171 ​ $ (2,392) 4 ​ $ 20,171 ​ $ (2,392) ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Mortgage-backed securities issued by U.S. government agencies or U.S. government-sponsored enterprises ​ ​ 10,326 ​ ​ (107) ​ ​ 554,514 ​ ​ (117,561) 152 ​ ​ 564,840 ​ ​ (117,668) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 10,326 ​ $ (107) ​ $ 574,685 ​ $ (119,953) ​ 156 ​ $ 585,011 ​ $ (120,060) ​ ​

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2024
Loans Receivable and Allowance for Credit Losses
Schedule of components of loans receivable	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ ​ (Dollars in thousands) 2024 2023 ​ Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ First mortgages: ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential ​ $ 1,265,288 ​ $ 1,277,544 ​ ​ Multi-family residential ​ 5,488 ​ 5,855 ​ ​ Construction, commercial, and other ​ 12,518 ​ 11,631 ​ ​ Home equity loans and lines of credit ​ 11,109 ​ 7,058 ​ ​ Total real estate loans ​ 1,294,403 ​ 1,302,088 ​ ​ Other loans: ​ ​ ​ ​ ​ ​ ​ ​ Loans on deposit accounts ​ 185 ​ 196 ​ ​ Consumer and other loans ​ 8,452 ​ 8,257 ​ ​ Total other loans ​ ​ 8,637 ​ ​ 8,453 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 1,303,040 ​ 1,310,541 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net unearned fees and discounts ​ (1,983) ​ (1,989) ​ ​ Total loans, net of unearned fees and discounts ​ 1,301,057 ​ 1,308,552 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses ​ (5,118) ​ (5,121) ​ ​ Loans receivable, net of allowance for credit losses ​ $ 1,295,939 ​ $ 1,303,431 ​ ​
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 Estate Commercial Consumer ​ (Dollars in thousands) Loans Loans Loans ​ Totals Three months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,483 ​ $ 526 ​ $ 133 ​ $ 5,142 (Reversal of provision) provision for credit losses ​ (63) ​ ​ 3 ​ ​ 34 ​ ​ (26) ​ ​ 4,420 ​ 529 ​ 167 ​ 5,116 Charge-offs ​ (3) ​ ​ — ​ ​ (14) ​ ​ (17) Recoveries ​ 13 ​ ​ — ​ ​ 6 ​ ​ 19 Net recoveries (charge-offs) ​ 10 ​ — ​ (8) ​ 2 Balance, end of period ​ $ 4,430 ​ $ 529 ​ $ 159 ​ $ 5,118 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,502 ​ $ 514 ​ $ 105 ​ $ 5,121 (Reversal of provision) provision for credit losses ​ (89) ​ ​ 15 ​ ​ 67 ​ ​ (7) ​ ​ 4,413 ​ 529 ​ 172 ​ 5,114 Charge-offs ​ (5) ​ — ​ (20) ​ (25) Recoveries ​ 22 ​ — ​ 7 ​ 29 Net recoveries (charge-offs) ​ 17 ​ — ​ (13) ​ 4 Balance, end of period ​ $ 4,430 ​ $ 529 ​ $ 159 ​ $ 5,118 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate Commercial Consumer (Dollars in thousands) Loans Loans Loans Unallocated Totals Three months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 4,629 ​ $ 417 ​ $ 81 ​ $ — ​ $ 5,127 Provision for credit losses ​ 172 ​ 19 ​ 21 ​ — ​ 212 ​ ​ 4,801 ​ 436 ​ 102 ​ — ​ 5,339 Charge-offs ​ (67) ​ (15) ​ — ​ — ​ (82) Recoveries ​ — ​ 5 ​ — ​ — ​ 5 Net charge-offs ​ (67) ​ (10) ​ — ​ — ​ (77) Balance, end of period ​ $ 4,734 ​ $ 426 ​ $ 102 ​ $ — ​ $ 5,262 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 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 Provision (reversal of provision) for credit losses ​ 145 ​ (69) ​ 36 ​ — ​ 112 ​ ​ 4,801 ​ 436 ​ 116 ​ — ​ 5,353 Charge-offs ​ (67) ​ (15) ​ (15) ​ — ​ (97) Recoveries ​ — ​ 5 ​ 1 ​ — ​ 6 Net charge-offs ​ (67) ​ (10) ​ (14) ​ — ​ (91) Balance, end of period ​ $ 4,734 ​ $ 426 ​ $ 102 ​ $ — ​ $ 5,262
Schedule of credit quality indicator by loan class and year.	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 June 30, 2024. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving Loans ​ ​ ​ ​ Amortized Cost of Term Loans by Origination Year ​ Amortized ​ ​ ​ (Dollars in thousands) ​ 2024 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ Prior ​ Cost Basis ​ Total June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 325 ​ ​ 592 ​ ​ 319 ​ ​ 4,757 ​ ​ — ​ ​ 966 ​ ​ 1,187 ​ ​ 8,146 Total Commercial ​ ​ 325 ​ ​ 592 ​ ​ 319 ​ ​ 4,757 ​ ​ — ​ ​ 966 ​ ​ 1,187 ​ ​ 8,146 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ 2 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 177 ​ ​ 46 ​ ​ 62 ​ ​ 12 ​ ​ 2 ​ ​ 48 ​ ​ 10,258 ​ ​ 10,605 Total Consumer ​ ​ 178 ​ ​ 46 ​ ​ 62 ​ ​ 12 ​ ​ 2 ​ ​ 48 ​ ​ 10,259 ​ ​ 10,607 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ — ​ ​ — ​ ​ 152 ​ ​ — ​ ​ — ​ ​ 255 ​ ​ — ​ ​ 407 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 87 ​ ​ — ​ ​ 87 Loans not past due ​ ​ 26,546 ​ ​ 90,431 ​ ​ 126,721 ​ ​ 277,511 ​ ​ 179,258 ​ ​ 581,343 ​ ​ — ​ ​ 1,281,810 Total Real Estate ​ ​ 26,546 ​ ​ 90,431 ​ ​ 126,873 ​ ​ 277,511 ​ ​ 179,258 ​ ​ 581,685 ​ ​ — ​ ​ 1,282,304 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 27,049 ​ $ 91,069 ​ $ 127,254 ​ $ 282,280 ​ $ 179,260 ​ $ 582,699 ​ $ 11,446 ​ $ 1,301,057 ​ The Company did not have any revolving loans that converted to term loans during the six months ended June 30, 2024. ​ 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 December 31, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revolving Loans ​ ​ ​ ​ Amortized Cost of Term Loans by Origination Year ​ Amortized ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Cost Basis ​ Total December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 387 ​ ​ 353 ​ ​ 4,836 ​ ​ — ​ ​ 203 ​ ​ 856 ​ ​ 1,230 ​ ​ 7,865 Total Commercial ​ ​ 387 ​ ​ 353 ​ ​ 4,836 ​ ​ — ​ ​ 203 ​ ​ 856 ​ ​ 1,230 ​ ​ 7,865 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ 4 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 4 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Loans not past due ​ ​ 271 ​ ​ 80 ​ ​ 20 ​ ​ 4 ​ ​ 14 ​ ​ 42 ​ ​ 6,137 ​ ​ 6,568 Total Consumer ​ ​ 275 ​ ​ 80 ​ ​ 20 ​ ​ 4 ​ ​ 14 ​ ​ 42 ​ ​ 6,137 ​ ​ 6,572 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 428 ​ ​ — ​ ​ 428 60 - 89 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days or more past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 140 ​ ​ 87 ​ ​ — ​ ​ 227 Loans not past due ​ ​ 91,195 ​ ​ 129,148 ​ ​ 283,571 ​ ​ 183,887 ​ ​ 91,113 ​ ​ 514,546 ​ ​ — ​ ​ 1,293,460 Total Real Estate ​ ​ 91,195 ​ ​ 129,148 ​ ​ 283,571 ​ ​ 183,887 ​ ​ 91,253 ​ ​ 515,061 ​ ​ — ​ ​ 1,294,115 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 91,857 ​ $ 129,581 ​ $ 288,427 ​ $ 183,891 ​ $ 91,470 ​ $ 515,959 ​ $ 7,367 ​ $ 1,308,552
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 six months ended June 30, 2024 and 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2024 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ Prior ​ Total Three months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 3 ​ $ 3 Loans on deposit accounts ​ ​ 14 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 14 Total ​ $ 14 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 3 ​ $ 17 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 5 ​ $ 5 Loans on deposit accounts ​ ​ 14 ​ ​ 3 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 17 Consumer and other ​ ​ — ​ ​ 2 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ 3 Total ​ $ 14 ​ $ 5 ​ $ — ​ $ — ​ $ — ​ $ 6 ​ $ 25 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Total Three months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 10 ​ $ 57 ​ $ 67 Consumer and other ​ ​ 12 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ — ​ ​ 15 Total ​ $ 12 ​ $ — ​ $ — ​ $ — ​ $ 13 ​ $ 57 ​ $ 82 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 10 ​ $ 57 ​ $ 67 Consumer and other ​ ​ 27 ​ ​ — ​ ​ — ​ ​ — ​ ​ 3 ​ ​ — ​ ​ 30 Total ​ $ 27 ​ $ — ​ $ — ​ $ — ​ $ 13 ​ $ 57 ​ $ 97
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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 407 ​ $ — ​ $ 87 ​ $ 494 ​ $ 1,262,864 ​ $ 1,263,358 ​ $ 1,063 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,482 ​ 5,482 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 12,465 ​ 12,465 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 11,111 ​ 11,111 ​ 6 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 185 ​ 185 ​ — ​ — ​ Consumer and other ​ 2 ​ — ​ — ​ 2 ​ 8,454 ​ 8,456 ​ 166 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 409 ​ $ — ​ $ 87 ​ $ 496 ​ $ 1,300,561 ​ $ 1,301,057 ​ $ 1,235 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 428 ​ $ — ​ $ 227 ​ $ 655 ​ $ 1,274,960 ​ $ 1,275,615 ​ $ 2,079 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,848 ​ 5,848 ​ — ​ — ​ Construction, commercial, and other mortgages ​ — ​ — ​ — ​ — ​ 11,570 ​ 11,570 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,060 ​ 7,060 ​ 11 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 196 ​ 196 ​ — ​ — ​ Consumer and other ​ 4 ​ — ​ — ​ 4 ​ 8,259 ​ 8,263 ​ 170 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 432 ​ $ — ​ $ 227 ​ $ 659 ​ $ 1,307,893 ​ $ 1,308,552 ​ $ 2,260 ​ $ — ​
Schedule of amortized cost basis of loans on nonaccrual status	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Nonaccrual Loans With a Related ACL Nonaccrual Loans Without a Related ACL Total Nonaccrual Loans June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 948 ​ $ 115 ​ $ 1,063 Home equity loans and lines of credit ​ ​ 6 ​ ​ — ​ ​ 6 Consumer and other ​ ​ 166 ​ ​ — ​ ​ 166 Total Nonaccrual Loans and Leases ​ $ 1,120 ​ $ 115 ​ $ 1,235 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 1,030 ​ $ 1,049 ​ $ 2,079 Home equity loans and lines of credit ​ ​ 11 ​ ​ — ​ ​ 11 Consumer and other ​ ​ 170 ​ ​ — ​ ​ 170 Total Nonaccrual Loans and Leases ​ $ 1,211 ​ $ 1,049 ​ $ 2,260

Advances from the Federal Hom_2

Advances from the Federal Home Loan Bank (Tables)	6 Months Ended
	Jun. 30, 2024
Advances from the Federal Home Loan Bank
Schedule of advances outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024 ​ December 31, 2023 Weighted ​ Weighted Average ​ Average (Dollars in thousands) Amount Rate Amount Rate Due within one year ​ $ 92,000 1.74 % ​ $ 82,000 1.40 % Due over 1 year to 2 years ​ 40,000 2.41 ​ ​ 45,000 2.87 ​ Due over 2 years to 3 years ​ 30,000 4.28 ​ ​ 20,000 3.20 ​ Due over 3 years to 4 years ​ ​ 70,000 ​ 4.32 ​ ​ ​ 30,000 ​ 4.24 ​ Due over 4 years to 5 years ​ ​ 5,000 ​ 4.38 ​ ​ ​ 60,000 ​ 4.32 ​ Due over 5 years to 6 years ​ — — ​ ​ 5,000 4.38 ​ Total ​ $ 237,000 2.99 % ​ $ 242,000 2.96 % ​

Advances from the Federal Res_2

Advances from the Federal Reserve Bank (Tables)	6 Months Ended
	Jun. 30, 2024
Federal Home Loan Bank Stock and Federal Reserve Bank Stock [Abstract]
Schedule of BTFP advances outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024 ​ December 31, 2023 Weighted ​ Weighted Average ​ Average (Dollars in thousands) Amount Rate Amount Rate Due within one year ​ $ 50,000 4.76 % ​ $ 50,000 4.89 % Total ​ $ 50,000 ​ 4.76 % ​ $ 50,000 ​ 4.89 % ​

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	6 Months Ended
	Jun. 30, 2024
Securities Sold Under Agreements to Repurchase
Summary of securities sold under agreements to repurchase	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024 ​ December 31, 2023 ​ Weighted ​ Weighted ​ Repurchase Average ​ Repurchase Average ​ (Dollars in thousands) Liability Rate Liability Rate ​ Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1 year or less ​ $ 10,000 1.81 % ​ $ 5,000 1.88 % ​ Over 1 year to 2 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 ​ $ 13,764 ​ $ 11,475 ​ $ 10,000 ​ $ 3,764 6 ​ ​

Offsetting of Financial Liabi_2

Offsetting of Financial Liabilities (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​

Employee Stock Ownership Plan (

Employee Stock Ownership Plan (Tables)	6 Months Ended
	Jun. 30, 2024
Employee Stock Ownership Plan.
Schedule of shares held by the ESOP trust	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, 2024 2023 Allocated shares ​ 644,405 ​ 619,938 ​ ​ Unearned shares ​ 220,198 ​ 244,665 ​ ​ Total ESOP shares ​ 864,603 ​ 864,603 ​ ​ Fair value of unearned shares, in thousands ​ $ 1,784 ​ $ 2,728 ​ ​

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2024
Schedule of compensation expense and related tax benefit for all share-based awards	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2024 2023 2024 2023 Compensation expense ​ $ 85 ​ $ 44 ​ $ 166 ​ $ 2 ​ Income tax benefit ​ 23 ​ 12 ​ 45 ​ 1 ​
Restricted Stock
Schedule of restricted stock award activity	​ ​ ​ ​ ​ ​ ​ ​ Weighted Time-Based Average Grant Restricted Date Fair Stock Value Unvested at December 31, 2023 25,738 ​ $ 21.61 ​ Granted 26,664 ​ 7.03 ​ Vested 12,178 ​ 22.83 ​ Forfeited — ​ — ​ Unvested at June 30, 2024 40,224 ​ $ 11.57 ​ ​ ​ ​ ​ ​ ​ ​ Unvested at December 31, 2022 23,664 ​ $ 24.15 ​ Granted 14,803 ​ 19.29 ​ Vested 12,729 ​ 23.64 ​ Forfeited — ​ — ​ Unvested at June 30, 2023 25,738 ​ $ 21.61 ​
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, 2023 44,967 ​ $ 22.85 Granted 31,995 ​ 7.03 Vested — ​ — Forfeited 12,797 ​ 26.77 Unvested at June 30, 2024 64,165 ​ $ 14.18 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2022 43,557 ​ $ 23.63 Granted 17,758 ​ 19.29 Vested — ​ — Forfeited 16,348 ​ 21.05 Unvested at June 30, 2023 44,967 ​ $ 22.85
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, 2023 11,245 ​ $ 22.31 Granted 8,000 ​ ​ 5.55 Vested — ​ — Forfeited 3,199 ​ 26.00 Unvested at June 30, 2024 16,046 ​ $ 13.22 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2022 10,889 ​ $ 24.04 Granted 4,443 ​ ​ 17.95 Vested — ​ — Forfeited 4,087 ​ 22.16 Unvested at June 30, 2023 11,245 ​ $ 22.31

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings Per Share
Schedule of information used to compute basic and diluted earnings per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands, except per share data) 2024 2023 2024 2023 Net (loss) income ​ $ (775) ​ $ 1,497 ​ $ (1,257) ​ $ 3,813 ​ Income allocated to participating securities ​ ​ — ​ ​ (9) ​ ​ — ​ ​ (28) ​ Net (loss) income available to common shareholders ​ $ (775) ​ $ 1,488 ​ $ (1,257) ​ $ 3,785 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average number of shares used in: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per share ​ 8,605,801 ​ 8,620,643 ​ 8,596,969 ​ 8,697,213 ​ Dilutive common stock equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options and restricted stock units ​ — ​ 38,284 ​ — ​ 43,486 ​ Diluted earnings per share ​ 8,605,801 ​ 8,658,927 ​ 8,596,969 ​ 8,740,699 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net (loss) income per common share, basic ​ $ (0.09) ​ $ 0.17 ​ $ (0.15) ​ $ 0.44 ​ Net (loss) income per common share, diluted ​ $ (0.09) ​ $ 0.17 ​ $ (0.15) ​ $ 0.43 ​

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 4,466 ​ $ 2,151 ​ $ 6,617 ​ Other comprehensive loss, net of taxes ​ ​ — ​ 115 ​ 115 ​ Net current period other comprehensive loss ​ — ​ 115 ​ 115 ​ Balances at end of period ​ $ 4,466 ​ $ 2,266 ​ $ 6,732 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,661 ​ $ 7,407 ​ Other comprehensive loss, net of taxes ​ — ​ 314 ​ 314 ​ Net current period other comprehensive loss ​ — ​ 314 ​ 314 ​ Balances at end of period ​ $ 5,746 ​ $ 1,975 ​ $ 7,721 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 4,466 ​ $ 1,755 ​ $ 6,221 ​ Other comprehensive loss, net of taxes ​ — ​ 511 ​ 511 ​ Net current period other comprehensive loss ​ — ​ 511 ​ 511 ​ Balances at end of period ​ $ 4,466 ​ $ 2,266 ​ $ 6,732 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,746 ​ $ 1,998 ​ $ 7,744 ​ Other comprehensive income, net of taxes ​ ​ — ​ ​ (23) ​ ​ (23) ​ Net current period other comprehensive income ​ — ​ (23) ​ (23) ​ Balances at end of period ​ $ 5,746 ​ $ 1,975 ​ $ 7,721 ​
Schedule of tax effect on each component of accumulated other comprehensive loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended June 30, 2024 2023 Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 157 ​ $ (42) ​ $ 115 ​ $ 428 ​ $ (114) ​ $ 314 ​ Total ​ $ 157 ​ $ (42) ​ $ 115 ​ $ 428 ​ $ (114) ​ $ 314 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended June 30, ​ 2024 2023 ​ Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss (gain) on securities ​ $ 697 ​ $ (186) ​ $ 511 ​ $ (31) ​ $ 8 ​ $ (23) ​ Total ​ $ 697 ​ $ (186) ​ $ 511 ​ $ (31) ​ $ 8 ​ $ (23) ​

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 306 ​ $ 37 ​ $ 343 Other revenue ​ ​ 33 ​ ​ 35 ​ ​ 68 Total ​ $ 339 ​ $ 72 ​ $ 411 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 377 ​ $ 27 ​ $ 404 Other revenue ​ ​ 37 ​ ​ 33 ​ ​ 70 Total ​ $ 414 ​ $ 60 ​ $ 474 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 546 ​ $ 77 ​ $ 623 Other revenue ​ ​ 66 ​ ​ 69 ​ ​ 135 Total ​ $ 612 ​ $ 146 ​ $ 758 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 652 ​ $ 69 ​ $ 721 Other revenue ​ ​ 72 ​ ​ 66 ​ ​ 138 Total ​ $ 724 ​ $ 135 ​ $ 859 ​

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2024
Leases
Schedule of lease costs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Six Months Ended ​ June 30, June 30, (Dollars in thousands) 2024 2023 2024 2023 Lease costs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease costs ​ $ 723 ​ $ 690 ​ $ 1,389 ​ $ 1,395 ​ Short-term lease costs ​ 131 ​ 111 ​ 294 ​ 215 ​ Variable lease costs ​ 36 ​ 34 ​ 79 ​ 77 ​ Total lease costs ​ $ 890 ​ $ 835 ​ $ 1,762 ​ $ 1,687 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash paid for amounts included in measurement of lease liabilities ​ $ 779 ​ $ (139) ​ $ 974 ​ $ 630 ​ ROU assets obtained in exchange for new operating lease liabilities ​ $ 695 ​ $ 388 ​ $ 1,099 ​ $ 506 ​ ​
Schedule of future minimum rental commitments under noncancellable operating leases and lease payment obligations	​ ​ ​ ​ ​ ​ ​ June 30, (Dollars in thousands) 2024 2024 ​ $ 1,477 2025 ​ 2,378 2026 ​ 2,224 2027 ​ 2,155 2028 ​ 1,902 Thereafter ​ 9,422 Total ​ ​ 19,558 ​ ​ ​ ​ Less present value discount ​ ​ (1,945) Present value of leases ​ $ 17,613 ​
Schedule of other lease related information	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ ​ June 30, ​ ​ ​ 2024 ​ 2023 ​ Weighted-average remaining lease term (years) ​ 9.57 ​ ​ 8.99 ​ ​ Weighted-average discount rate ​ ​ 2.22 % ​ ​ 2.14 % ​ ​

Fair Value of Financial Instrum

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 82,782 ​ $ 82,782 ​ $ 82,782 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 19,095 ​ ​ 19,095 ​ ​ — ​ ​ 19,095 ​ ​ — ​ Investment securities held to maturity ​ 666,103 ​ ​ 535,799 ​ ​ — ​ ​ 535,799 ​ ​ — ​ Loans held for sale ​ 312 ​ ​ 319 ​ ​ — ​ ​ 319 ​ ​ — ​ Loans receivable, net ​ 1,301,057 ​ ​ 1,082,564 ​ ​ — ​ ​ — ​ ​ 1,082,564 ​ FHLB stock ​ 12,007 ​ ​ 12,007 ​ ​ — ​ ​ 12,007 ​ ​ — ​ FRB stock ​ ​ 3,185 ​ ​ 3,185 ​ ​ — ​ ​ 3,185 ​ ​ — ​ Accrued interest receivable ​ 6,039 ​ ​ 6,039 ​ ​ 61 ​ ​ 1,396 ​ ​ 4,582 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,572,751 ​ ​ 1,569,681 ​ ​ — ​ ​ 1,040,743 ​ ​ 528,938 ​ Advances from the Federal Home Loan Bank ​ 237,000 ​ ​ 233,922 ​ ​ — ​ ​ 233,922 ​ ​ — ​ Advances from the Federal Reserve Bank ​ ​ 50,000 ​ ​ 49,850 ​ ​ — ​ ​ 49,850 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,837 ​ ​ — ​ ​ 9,837 ​ ​ — ​ Accrued interest payable ​ 1,625 ​ ​ 1,625 ​ ​ — ​ ​ 1,105 ​ ​ 520 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 126,659 ​ $ 126,659 ​ $ 126,659 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 20,171 ​ ​ 20,171 ​ ​ — ​ ​ 20,171 ​ ​ — ​ Investment securities held to maturity ​ 685,728 ​ ​ 568,128 ​ ​ — ​ ​ 568,128 ​ ​ — ​ Loans receivable, net ​ 1,303,431 ​ ​ 1,120,704 ​ ​ — ​ ​ — ​ ​ 1,120,704 ​ FHLB stock ​ 12,192 ​ ​ 12,192 ​ ​ — ​ ​ 12,192 ​ ​ — ​ FRB stock ​ ​ 3,180 ​ ​ 3,180 ​ ​ — ​ ​ 3,180 ​ ​ — ​ Accrued interest receivable ​ 6,105 ​ ​ 6,105 ​ ​ 79 ​ ​ 1,441 ​ ​ 4,585 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,636,604 ​ ​ 1,633,164 ​ ​ — ​ ​ 1,104,171 ​ ​ 528,993 ​ Advances from the Federal Home Loan Bank ​ 242,000 ​ ​ 238,380 ​ ​ — ​ ​ 238,380 ​ ​ — ​ Advances from the Federal Reserve Bank ​ ​ 50,000 ​ ​ 50,049 ​ ​ — ​ ​ 50,049 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,700 ​ ​ — ​ ​ 9,700 ​ ​ — ​ Accrued interest payable ​ 1,183 ​ ​ 1,183 ​ ​ — ​ ​ 157 ​ ​ 1,026 ​
Schedule of assets and liabilities measured at fair value on a recurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Level 1 Level 2 Level 3 Total June 30, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 19,095 ​ $ — ​ $ 19,095 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 20,171 ​ $ — ​ $ 20,171 ​

Organization - Narrative (Detai

Organization - Narrative (Details)	6 Months Ended
	Jun. 30, 2024 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) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Summary of Significant Accounting Policies
Financing receivable accrued interest after allowance for credit loss	$ 4.6	$ 4.6
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Interest Receivable
Reserve for off-balance sheet credit exposure	$ 0	$ 0
ACL	$ 0

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Cash and Cash Equivalents
Cash and due from banks	$ 8,021	$ 10,471
Interest-earning deposits in other banks	74,761	116,188
Cash and cash equivalents	$ 82,782	$ 126,659

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Values of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Available-for-Sale [Abstract]
Amortized Cost	$ 22,184
Estimated Fair Value	19,095	$ 20,171
ACL	0
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	666,103	685,728
Estimated Fair Value	535,799	568,128
Debt Securities, Available-for-Sale and Held-to-Maturity, after Allowance for Credit Loss [Abstract]
Total Amortized Cost	688,287	708,291
Total Gross Unrealized Gains	7	68
Total Gross Unrealized Losses	(133,400)	(120,060)
Total Estimated Fair Value	554,894	588,299
U.S. government-sponsored mortgage-backed securities
Available-for-Sale [Abstract]
Amortized Cost	22,184	22,563
Gross Unrealized Losses	(3,089)	(2,392)
Estimated Fair Value	19,095	20,171
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	666,103	685,728
Gross Unrealized Gains	7	68
Gross Unrealized Losses	(130,311)	(117,668)
Estimated Fair Value	$ 535,799	$ 568,128

Investment Securities - Maturit

Investment Securities - Maturity Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost
Due after 10 years	$ 22,184
Amortized Cost	22,184
Estimated Fair Value
Due after 10 years	19,095
Estimated Fair Value	$ 19,095	$ 20,171

Investment Securities - Matur_2

Investment Securities - Maturity Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Held-to-maturity, Amortized Cost
Due within 5 years	$ 12
Due after 5 years through 10 years	4
Due after 10 years	666,087
Amortized Cost	666,103	$ 685,728
Held-to-maturity, Estimated Fair Value
Due within 5 years	12
Due after 5 years through 10 years	4
Due after 10 years	535,783
Estimated Fair Value	$ 535,799	$ 568,128

Investment Securities - Securit

Investment Securities - Securities Pledged (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Realized gains and losses and the proceeds from sales of securities
Amortized cost	$ 666,103	$ 685,728
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	$ 610,600	555,800
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	288,100	74,000
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	$ 51,900	$ 202,100

Investment Securities - Summary

Investment Securities - Summary of Investment Securities In Unrealized Loss Position Summary (Details) $ in Thousands	Jun. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Available-for-Sale [Abstract]
12 Months or Longer Fair Value	$ 19,095	$ 20,171
12 Months or Longer Unrealized Losses	$ (3,089)	$ (2,392)
Total Number of Securities | security	4	4
Total Fair Value	$ 19,095	$ 20,171
Total Unrealized Losses	(3,089)	(2,392)
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Less Than 12 Months Fair Value	476	10,326
Less Than 12 Months Unrealized Losses	(6)	(107)
12 Months or Longer Fair Value	532,700	554,514
12 Months or Longer Unrealized Losses	$ (130,305)	$ (117,561)
Total Number of Securities	154	152
Total Fair Value	$ 533,176	$ 564,840
Total Unrealized Losses	$ (130,311)	$ (117,668)

Investment Securities - Availab

Investment Securities - Available-for-Sale Unrealized Loss and Held-to-Maturity Total Unrealized Loss Position Summary (Details) $ in Thousands	Jun. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Investment Securities
Total Less Than 12 Months Unrealized Fair Value	$ 476	$ 10,326
Total Less Than 12 Months Unrealized Losses	(6)	(107)
Total 12 Months or Longer Unrealized Fair Value	551,795	574,685
Total 12 Months or Longer Unrealized Losses	$ (133,394)	$ (119,953)
Total Number of Securities | security	158	156
Total Fair value	$ 552,271	$ 585,011
Total Unrealized losses	$ (133,400)	$ (120,060)

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Credit Losses - Components (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Components of loans receivable, net of allowance for credit losses
Total loans	$ 1,303,040		$ 1,310,541
Net unearned fees and discounts	(1,983)		(1,989)
Total loans, net of unearned fees and discounts	1,301,057		1,308,552
Allowance for credit losses	(5,118)	$ (5,142)	(5,121)	$ (5,262)	$ (5,127)	$ (2,032)
Loans receivable, net of allowance for credit losses	1,295,939		1,303,431
Other loans
Components of loans receivable, net of allowance for credit losses
Total loans	8,637		8,453
Unallocated
Components of loans receivable, net of allowance for credit losses
Allowance for credit losses						$ (259)
Real estate loans
Components of loans receivable, net of allowance for credit losses
Total loans	1,294,403		1,302,088
Real estate loans | One- to four-family residential
Components of loans receivable, net of allowance for credit losses
Total loans	1,265,288		1,277,544
Real estate loans | Multi-family residential
Components of loans receivable, net of allowance for credit losses
Total loans	5,488		5,855
Real estate loans | Construction, commercial, and other mortgages
Components of loans receivable, net of allowance for credit losses
Total loans	12,518		11,631
Real estate loans | Home equity loans and lines of credit
Components of loans receivable, net of allowance for credit losses
Total loans	11,109		7,058
Other loans | Loans on deposit accounts
Components of loans receivable, net of allowance for credit losses
Total loans	185		196
Other loans | Consumer and other
Components of loans receivable, net of allowance for credit losses
Total loans	$ 8,452		$ 8,257

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Credit Losses - Activity in Allowance for Loan Losses by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Activity in allowance for loan losses
Balance, beginning of period	$ 5,142	$ 5,127	$ 5,121	$ 2,032
(Reversal of provision) provision for credit losses	(26)	212	(7)	112
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses	5,116	5,339	5,114	5,353
Charge-offs	(17)	(82)	(25)	(97)
Recoveries	19	5	29	6
Net recoveries (charge-offs)	2	(77)	4	(91)
Balance, end of period	5,118	5,262	5,118	5,262
Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		3,209		3,209
Real Estate
Activity in allowance for loan losses
Balance, beginning of period	4,483	4,629	4,502	1,263
(Reversal of provision) provision for credit losses	(63)	172	(89)	145
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses	4,420	4,801	4,413	4,801
Charge-offs	(3)	(67)	(5)	(67)
Recoveries	13		22
Net recoveries (charge-offs)	10	(67)	17	(67)
Balance, end of period	4,430	4,734	4,430	4,734
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		3,393
Commercial
Activity in allowance for loan losses
Balance, beginning of period	526	417	514	434
(Reversal of provision) provision for credit losses	3	19	15	(69)
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses	529	436	529	436
Charge-offs		(15)		(15)
Recoveries		5		5
Net recoveries (charge-offs)		(10)		(10)
Balance, end of period	529	426	529	426
Commercial | Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		71		71
Consumer
Activity in allowance for loan losses
Balance, beginning of period	133	81	105	76
(Reversal of provision) provision for credit losses	34	21	67	36
Allowance for loan losses on loans receivable after (reversal of provision) provision for loan losses	167	102	172	116
Charge-offs	(14)		(20)	(15)
Recoveries	6		7	1
Net recoveries (charge-offs)	(8)		(13)	(14)
Balance, end of period	$ 159	102	$ 159	102
Consumer | Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		4		4
Unallocated
Activity in allowance for loan losses
Balance, beginning of period				259
Unallocated | Adoption of ASU No. 2016-13 | Accounting Standards Update 2016-13 [Member]
Activity in allowance for loan losses
Balance, end of period		$ (259)		$ (259)

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Credit Losses - Amortized Cost by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due
2024	$ 27,049	$ 91,857
2023	91,069	129,581
2022	127,254	288,427
2021	282,280	183,891
2020	179,260	91,470
Prior	582,699	515,959
Revolving Loans Amortized Cost Basis	11,446	7,367
Total	1,301,057	1,308,552
Commercial
Financing Receivable, Recorded Investment, Past Due
2024	325	387
2023	592	353
2022	319	4,836
2021	4,757
2020		203
Prior	966	856
Revolving Loans Amortized Cost Basis	1,187	1,230
Total	8,146	7,865
Consumer
Financing Receivable, Recorded Investment, Past Due
2024	178	275
2023	46	80
2022	62	20
2021	12	4
2020	2	14
Prior	48	42
Revolving Loans Amortized Cost Basis	10,259	6,137
Total	10,607	6,572
Real Estate
Financing Receivable, Recorded Investment, Past Due
2024	26,546	91,195
2023	90,431	129,148
2022	126,873	283,571
2021	277,511	183,887
2020	179,258	91,253
Prior	581,685	515,061
Total	1,282,304	1,294,115
Not Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due
2024	325	387
2023	592	353
2022	319	4,836
2021	4,757
2020		203
Prior	966	856
Revolving Loans Amortized Cost Basis	1,187	1,230
Total	8,146	7,865
Not Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due
2024	177	271
2023	46	80
2022	62	20
2021	12	4
2020	2	14
Prior	48	42
Revolving Loans Amortized Cost Basis	10,258	6,137
Total	10,605	6,568
Not Past Due | Real Estate
Financing Receivable, Recorded Investment, Past Due
2024	26,546	91,195
2023	90,431	129,148
2022	126,721	283,571
2021	277,511	183,887
2020	179,258	91,113
Prior	581,343	514,546
Total	1,281,810	1,293,460
30 - 59 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due
2024	1	4
Revolving Loans Amortized Cost Basis	1
Total	2	4
30 - 59 Days Past Due | Real Estate
Financing Receivable, Recorded Investment, Past Due
2022	152
Prior	255	428
Total	407	428
90 Days or More Past Due | Real Estate
Financing Receivable, Recorded Investment, Past Due
2020		140
Prior	87	87
Total	$ 87	$ 227

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Credit Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 17	$ 82	$ 25	$ 97
Year 2024
Impaired Financing Receivable 1 [Line Items]
Charge offs	14		14
Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs		12	5	27
Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs		13		13
Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	3	57	6	57
One- to four-family residential mortgages
Impaired Financing Receivable 1 [Line Items]
Charge offs	3	67	5	67
One- to four-family residential mortgages | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs		10		10
One- to four-family residential mortgages | Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs	3	57	5	57
Loans on deposit accounts
Impaired Financing Receivable 1 [Line Items]
Charge offs	14		17
Loans on deposit accounts | Year 2024
Impaired Financing Receivable 1 [Line Items]
Charge offs	$ 14		14
Loans on deposit accounts | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs			3
Consumer and other
Impaired Financing Receivable 1 [Line Items]
Charge offs		15	3	30
Consumer and other | Year 2023
Impaired Financing Receivable 1 [Line Items]
Charge offs		12	2	27
Consumer and other | Year 2019
Impaired Financing Receivable 1 [Line Items]
Charge offs		$ 3		$ 3
Consumer and other | Prior years
Impaired Financing Receivable 1 [Line Items]
Charge offs			$ 1

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses - Aging of Loans and Accrual Status by Class (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due
Total Loans	$ 1,301,057,000	$ 1,308,552,000
Nonaccrual Loans	1,235,000	2,260,000
Loans 90 Days or More Past Due and Still Accruing	0	0
One- to four-family residential mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,263,358,000	1,275,615,000
Nonaccrual Loans	1,063,000	2,079,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Multi-family residential mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	5,482,000	5,848,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Construction, commercial, and other mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	12,465,000	11,570,000
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	11,111,000	7,060,000
Nonaccrual Loans	6,000	11,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Loans on deposit accounts
Financing Receivable, Recorded Investment, Past Due
Total Loans	185,000	196,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	8,456,000	8,263,000
Nonaccrual Loans	166,000	170,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Not Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,300,561,000	1,307,893,000
Not Past Due | One- to four-family residential mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,262,864,000	1,274,960,000
Not Past Due | Multi-family residential mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	5,482,000	5,848,000
Not Past Due | Construction, commercial, and other mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	12,465,000	11,570,000
Not Past Due | Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due
Total Loans	11,111,000	7,060,000
Not Past Due | Loans on deposit accounts
Financing Receivable, Recorded Investment, Past Due
Total Loans	185,000	196,000
Not Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	8,454,000	8,259,000
Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	496,000	659,000
Past Due | One- to four-family residential mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	494,000	655,000
Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	2,000	4,000
30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	409,000	432,000
30 - 59 Days Past Due | One- to four-family residential mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	407,000	428,000
30 - 59 Days Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	2,000	4,000
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	87,000	227,000
90 Days or More Past Due | One- to four-family residential mortgages
Financing Receivable, Recorded Investment, Past Due
Total Loans	$ 87,000	$ 227,000

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Credit Losses - Amortized cost basis of loans on nonaccrual status (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a Related ACL	$ 1,120	$ 1,211
Nonaccrual loans without a Related ACL	115	1,049
Total Nonaccrual Loans	1,235	2,260
One- to four-family residential mortgages
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a Related ACL	948	1,030
Nonaccrual loans without a Related ACL	115	1,049
Total Nonaccrual Loans	1,063	2,079
Home equity loans and lines of credit
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a Related ACL	6	11
Total Nonaccrual Loans	6	11
Consumer and other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans with a Related ACL	166	170
Total Nonaccrual Loans	$ 166	$ 170

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Credit Losses - Delinquent and Nonaccrual Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable
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
Total Loans	$ 1,301,057	$ 1,308,552
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable
Total Loans	$ 87	$ 227

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Credit Losses - Collateral, Sales, Serviced for Others, Directors and Executive Officers (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) loan	Jun. 30, 2023 USD ($) loan	Jun. 30, 2024 USD ($) loan	Jun. 30, 2023 USD ($) loan	Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable
Loans held for sale	$ 312,000		$ 312,000
Loans serviced for others	32,100,000		32,100,000		$ 33,200,000
Loans serviced for others, securitization for which the company continues to hold the related mortgage-backed securities	18,800,000		18,800,000		$ 19,300,000
Loans serviced for others, amount of contractually specified servicing fees earned	$ 21,000	$ 23,000	$ 43,000	$ 46,000
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
Number of nonaccrual loans | loan	1	0	1	0
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable
Residential mortgage loans sold, loan amount				$ 827,000
Residential mortgage loans sold, recognized gains				$ 10,000

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Credit Losses - Troubled Debt Restructurings (Details)	Jun. 30, 2024 USD ($) loan	Dec. 31, 2023 USD ($)
Additional disclosures
Real estate owned	$ 0	$ 0
Residential Mortgage
Additional disclosures
Mortgage loans in process of foreclosure, number of contracts	1	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	$ 87,000

Advances from the Federal Hom_3

Advances from the Federal Home Loan Bank (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Rolling Maturity
Due within one year	$ 92,000	$ 82,000
Due over 1 year to 2 years	40,000	45,000
Due over 2 years to 3 years	30,000	20,000
Due over 3 years to 4 years	70,000	30,000
Due over 4 years to 5 years	5,000	60,000
Due over 5 years to 6 years		5,000
Total	$ 237,000	$ 242,000
Weighted Average Rate
Due within one year (as a percent)	1.74%	1.40%
Due over 1 year to 2 years (as a percent)	2.41%	2.87%
Due over 2 years to 3 years (as a percent)	4.28%	3.20%
Due over 3 years to 4 years (as a percent)	4.32%	4.24%
Due over 4 years to 5 years (as a percent)	4.38%	4.32%
Due over 5 years to 6 years (as a percent)		4.38%
Total (as a percent)	2.99%	2.96%
FHLB Des Moines
Federal Home Loan Bank advances
Available additional unused FHLB advances	$ 593,500	$ 612,600
Territorial Savings Bank | FHLB Des Moines
Federal Home Loan Bank advances
Percentage of total assets used to determine maximum line of credit	45%	45%

Advances from the Federal Res_3

Advances from the Federal Reserve Bank (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank Stock and Federal Reserve Bank Stock [Abstract]
Due within one year	$ 50,000	$ 50,000
Due within one year (Weighted Average Rate)	4.76%	4.89%

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Summary of Repurchase Liability by Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
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%
1 year or less
Securities sold under agreements to repurchase
Repurchase Liability	$ 10,000	$ 5,000
1 year or less | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.81%	1.88%
Over 1 year to 2 years
Securities sold under agreements to repurchase
Repurchase Liability		$ 5,000
Over 1 year to 2 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	6 Months Ended
	Jun. 30, 2024 USD ($)
Securities sold under agreements to repurchase
Carrying Value of Securities	$ 13,764
Fair Value of Securities	11,475
Repurchase Liability	10,000
Amount at Risk	$ 3,764
Weighted Average Months to Maturity	6 months

Offsetting of Financial Liabi_3

Offsetting of Financial Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
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		6 Months Ended
	Jan. 01, 2009	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Employee Stock Ownership Plan
Allocated shares		644,405		644,405		619,938
Unearned shares		220,198		220,198		244,665
Total ESOP shares		864,603		864,603		864,603
Fair value of unearned shares, in thousands		$ 1,784,000		$ 1,784,000		$ 2,728,000
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		$ 94,000	$ 171,000	$ 212,000	$ 452,000
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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
ESOP restoration | Certain executives
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits
Accrued (reversed) benefits	$ (39,000)	$ (28,000)	$ (28,000)	$ (21,000)

Share-Based Compensation - Plan

Share-Based Compensation - Plan Provisions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-Based Compensation
Compensation expense	$ 85	$ 44	$ 166	$ 2
Income tax benefit	$ 23	$ 12	$ 45	$ 1
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	4,949		4,949

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock Awards (Details) - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
2019 Equity Incentive Plan
Unrecognized compensation
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	4,949
Restricted Stock
Restricted Stock Awards
Unvested at beginning of period (in shares)	25,738	23,664
Granted (in shares)	26,664	14,803
Vested (in shares)	12,178	12,729
Unvested at end of period (in shares)	40,224	25,738
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 21.61	$ 24.15
Granted (in dollars per share)	7.03	19.29
Vested (in dollars per share)	22.83	23.64
Unvested at end of period (in dollars per share)	$ 11.57	$ 21.61
Unrecognized compensation
Unrecognized compensation costs	$ 414,000
Restricted Stock Units Based on a Performance Condition
Restricted Stock Awards
Unvested at beginning of period (in shares)	44,967	43,557
Granted (in shares)	31,995	17,758
Forfeited (in shares)	12,797	16,348
Unvested at end of period (in shares)	64,165	44,967
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 22.85	$ 23.63
Granted (in dollars per share)	7.03	19.29
Forfeited (in dollars per share)	26.77	21.05
Unvested at end of period (in dollars per share)	$ 14.18	$ 22.85
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)	11,245	10,889
Granted (in shares)	8,000	4,443
Forfeited (in shares)	3,199	4,087
Unvested at end of period (in shares)	16,046	11,245
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 22.31	$ 24.04
Granted (in dollars per share)	5.55	17.95
Forfeited (in dollars per share)	26	22.16
Unvested at end of period (in dollars per share)	$ 13.22	$ 22.31
Unrecognized compensation
Unrecognized compensation costs	$ 67,000
Unrecognized compensation costs, period of recognition	3 years
Performance Based Restricted Stock Units (PRSUs)
Unrecognized compensation
Unrecognized compensation costs	$ 139,000
Unrecognized compensation costs, period of recognition	3 years
Performance Based Restricted Stock Units (PRSUs) | Maximum
Unrecognized compensation
Unrecognized compensation costs	$ 457,000

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share
Net Income (Loss)	$ (775)	$ 1,497	$ (1,257)	$ 3,813
Income allotted to participating securities		(9)		(28)
Net (loss) income available to common shareholders	$ (775)	$ 1,488	$ (1,257)	$ 3,785
Weighted-average number of shares used in:
Basic earnings per share (in shares)	8,605,801	8,620,643	8,596,969	8,697,213
Dilutive common stock equivalents:
Stock options and restricted stock units (in shares)		38,284		43,486
Diluted earnings per share (in shares)	8,605,801	8,658,927	8,596,969	8,740,699
Net income per common share, basic (in dollars per share)	$ (0.09)	$ 0.17	$ (0.15)	$ 0.44
Net income per common share, diluted (in dollars per share)	$ (0.09)	$ 0.17	$ (0.15)	$ 0.43

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Changes in Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	$ (250,016)	$ (253,761)	$ (251,086)	$ (256,550)
Other comprehensive (income) loss, net of taxes	115	314	511	(23)
Net current period other comprehensive (income) loss	115	314	511	(23)
Balances at end of period	(249,167)	(250,634)	(249,167)	(250,634)
Accumulated Other Comprehensive (Loss)/Income
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	6,617	7,407	6,221	7,744
Other comprehensive (income) loss, net of taxes	115	314	511	(23)
Net current period other comprehensive (income) loss	115	314	511	(23)
Balances at end of period	6,732	7,721	6,732	7,721
Unfunded Pension Liability
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	4,466	5,746	4,466	5,746
Balances at end of period	4,466	5,746	4,466	5,746
Unrealized Loss/(Gain) on Securities
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	2,151	1,661	1,755	1,998
Other comprehensive (income) loss, net of taxes	115	314	511	(23)
Net current period other comprehensive (income) loss	115	314	511	(23)
Balances at end of period	$ 2,266	$ 1,975	$ 2,266	$ 1,975

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss - Tax Effect on Each Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Tax effect on each component of other comprehensive loss
Pretax amount	$ 157	$ 428	$ 697	$ (31)
Tax	(42)	(114)	(186)	8
After Tax Amount	115	314	511	(23)
Unrealized loss (gain) on securities
Tax effect on each component of other comprehensive loss
Pretax amount	157	428	697	(31)
Tax	(42)	(114)	(186)	8
After Tax Amount	$ 115	$ 314	$ 511	$ (23)

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues
Revenue from contracts with customers	$ 343	$ 404	$ 623	$ 721
Other revenue	68	70	135	138
Total	411	474	758	859
Service and Other Fees
Revenues
Revenue from contracts with customers	306	377	546	652
Other revenue	33	37	66	72
Total	339	414	612	724
Other
Revenues
Revenue from contracts with customers	37	27	77	69
Other revenue	35	33	69	66
Total	$ 72	$ 60	$ 146	$ 135

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Lease costs:
Operating lease costs	$ 723	$ 690	$ 1,389	$ 1,395
Short-term lease costs	131	111	294	215
Variable lease costs	36	34	79	77
Total lease costs	890	835	1,762	1,687
Cash paid for amounts included in measurement of lease liabilities	779		974	630
Cash paid for amounts included in measurement of lease liabilities		(139)
ROU assets obtained in exchange for new operating lease liabilities	$ 695	$ 388	$ 1,099	$ 506

Leases - Future Minimum Rental

Leases - Future Minimum Rental Commitments Under Non-cancellable Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Future minimum rental commitments:
2024	$ 1,477
2025	2,378
2026	2,224
2027	2,155
2028	1,902
Thereafter	9,422
Total	19,558
Less present value discount	(1,945)
Present value of leases	$ 17,613	$ 17,297

Leases - Other Related Informat

Leases - Other Related Information (Details)	Jun. 30, 2024	Jun. 30, 2023
Leases
Weighted-average remaining lease term (years)	9 years 6 months 25 days	8 years 11 months 26 days
Weighted-average discount rate	2.22%	2.14%

Fair Value - Estimated Fair Val

Fair Value - Estimated Fair Values (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Assets
Investment securities available for sale, at fair value	$ 19,095,000	$ 20,171,000
Investment securities held to maturity	535,799,000	568,128,000
Loans held for sale	312,000
Liabilities
Advances from Federal Reserve Bank	50,000,000	50,000,000
Carrying Amount
Assets
Cash and cash equivalents	82,782,000	126,659,000
Investment securities available for sale, at fair value	19,095,000	20,171,000
Investment securities held to maturity	666,103,000	685,728,000
Loans held for sale	312,000
Loans receivable, net	1,301,057,000	1,303,431,000
FHLB stock	12,007,000	12,192,000
FRB stock	3,185,000	3,180,000
Accrued interest receivable	6,039,000	6,105,000
Liabilities
Deposits	1,572,751,000	1,636,604,000
Advances from the Federal Home Loan Bank	237,000,000	242,000,000
Advances from Federal Reserve Bank	50,000,000	50,000,000
Securities sold under agreements to repurchase	10,000,000	10,000,000
Accrued interest payable	1,625,000	1,183,000
Estimated Fair Value
Assets
Cash and cash equivalents	82,782,000	126,659,000
Investment securities available for sale, at fair value	19,095,000	20,171,000
Investment securities held to maturity	535,799,000	568,128,000
Loans held for sale	319,000
Loans receivable, net	1,082,564,000	1,120,704,000
FHLB stock	12,007,000	12,192,000
FRB stock	3,185,000	3,180,000
Accrued interest receivable	6,039,000	6,105,000
Liabilities
Deposits	1,569,681,000	1,633,164,000
Advances from the Federal Home Loan Bank	233,922,000	238,380,000
Advances from Federal Reserve Bank	49,850,000	50,049,000
Securities sold under agreements to repurchase	9,837,000	9,700,000
Accrued interest payable	1,625,000	1,183,000
Estimated Fair Value | Level 1
Assets
Cash and cash equivalents	82,782,000	126,659,000
Accrued interest receivable	61,000	79,000
Estimated Fair Value | Level 2
Assets
Investment securities available for sale, at fair value	19,095,000	20,171,000
Investment securities held to maturity	535,799,000	568,128,000
Loans held for sale	319,000
FHLB stock	12,007,000	12,192,000
FRB stock	3,185,000	3,180,000
Accrued interest receivable	1,396,000	1,441,000
Liabilities
Deposits	1,040,743,000	1,104,171,000
Advances from the Federal Home Loan Bank	233,922,000	238,380,000
Advances from Federal Reserve Bank	49,850,000	50,049,000
Securities sold under agreements to repurchase	9,837,000	9,700,000
Accrued interest payable	1,105,000	157,000
Estimated Fair Value | Level 3
Assets
Loans receivable, net	1,082,564,000	1,120,704,000
Accrued interest receivable	4,582,000	4,585,000
Liabilities
Deposits	528,938,000	528,993,000
Accrued interest payable	$ 520,000	$ 1,026,000

Fair Value - Recurring Basis (D

Fair Value - Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	$ 19,095	$ 20,171
Fair Value, Measurements, Recurring
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	19,095	20,171
Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	$ 19,095	$ 20,171

Fair Value - Nonrecurring Basis

Fair Value - Nonrecurring Basis (Details)	Jun. 30, 2024 USD ($)
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Loans held for sale	$ 312,000
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		6 Months Ended
	Jul. 26, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Subsequent Events
Quarterly cash dividend declared on common stock (in dollars per share)		$ 0.01	$ 0.23	$ 0.06	$ 0.46
Subsequent event | O 2024 Q2 Dividends
Subsequent Events
Dividends payable, date declared	Jul. 26, 2024
Quarterly cash dividend declared on common stock (in dollars per share)	$ 0.01
Dividends payable, date to be paid	Aug. 23, 2024
Dividends payable, date of record	Aug. 09, 2024