Territorial Bancorp (TBNK) 10-Q 10 Nov 22 2022 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Oct. 31, 2022
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2022
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	1132 Bishop Street, Suite 2200
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		9,113,668
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001447051
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 36,286	$ 99,859
Investment securities available for sale, at fair value	21,142
Investment securities held to maturity, at amortized cost (fair value of $585,752 and $634,987 at September 30, 2022 and December 31, 2021, respectively)	717,434	636,442
Loans receivable, net	1,295,044	1,302,824
Federal Home Loan Bank stock, at cost	8,197	8,173
Federal Reserve Bank stock, at cost	3,171	3,158
Accrued interest receivable	6,061	5,786
Premises and equipment, net	6,114	4,065
Right-of-use asset, net	14,649	9,982
Bank-owned life insurance	47,583	51,423
Deferred income tax assets, net	2,335	1,927
Prepaid expenses and other assets	6,807	6,963
Total assets	2,164,823	2,130,602
Liabilities:
Deposits	1,711,853	1,681,828
Advances from the Federal Home Loan Bank	141,000	141,000
Securities sold under agreements to repurchase	10,000	10,000
Accounts payable and accrued expenses	24,105	22,638
Lease liability	15,396	10,744
Income taxes payable	2,684	1,863
Advance payments by borrowers for taxes and insurance	3,040	6,207
Total liabilities	1,908,078	1,874,280
Commitments and contingencies
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 9,113,668 and 9,324,060 shares at September 30, 2022 and December 31, 2021, respectively	91	93
Additional paid-in capital	52,440	56,951
Unearned ESOP shares	(3,058)	(3,425)
Retained earnings	214,787	208,227
Accumulated other comprehensive loss	7,515	5,524
Total stockholders' equity	256,745	256,322
Total liabilities and stockholders' equity	$ 2,164,823	$ 2,130,602

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Consolidated Balance Sheets
Investment securities held to maturity, fair value (in dollars)	$ 585,752	$ 634,987
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, authorized shares	50,000,000
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Common stock, par value (in dollars per share)	$ 0.01
Common stock, authorized shares	100,000,000
Common stock, shares issued	9,113,668	9,324,060
Common stock, shares outstanding	9,113,668	9,324,060

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income:
Loans	$ 11,376	$ 11,836	$ 33,909	$ 37,019
Investment securities	4,402	3,251	11,753	7,470
Other investments	373	188	816	647
Total interest income	16,151	15,275	46,478	45,136
Interest expense:
Deposits	1,242	844	2,577	3,251
Advances from the Federal Home Loan Bank	522	522	1,549	1,595
Securities sold under agreements to repurchase	46	46	137	137
Total interest expense	1,810	1,412	4,263	4,983
Net interest income	14,341	13,863	42,215	40,153
Reversal of provision for loan losses	(109)	(167)	(603)	(1,452)
Net interest income after reversal of provision for loan losses	14,450	14,030	42,818	41,605
Noninterest income:
Income on bank-owned life insurance	200	192	591	570
Gain on sale of investment securities		403		1,840
Net gain (loss) on sale of loans		138	(3)	584
Other	76	57	1,359	237
Total noninterest income	615	1,223	3,039	5,189
Noninterest expense:
Salaries and employee benefits	5,513	5,493	16,518	16,576
Occupancy	1,682	1,636	4,924	4,855
Equipment	1,317	1,079	3,749	3,273
Federal deposit insurance premiums	145	141	429	424
Other general and administrative expenses	1,112	1,215	3,291	3,602
Total noninterest expense	9,769	9,564	28,911	28,730
Income before income taxes	5,296	5,689	16,946	18,064
Income taxes	1,405	1,527	4,235	4,831
Net income	$ 3,891	$ 4,162	$ 12,711	$ 13,233
Basic earnings per share (in dollars per share)	$ 0.44	$ 0.46	$ 1.42	$ 1.45
Diluted earnings per share (in dollars per share)	0.44	0.46	1.41	1.44
Cash dividends declared per common share (in dollars per share)	$ 0.23	$ 0.23	$ 0.69	$ 0.69
Basic weighted-average shares outstanding (in shares)	8,802,010	9,012,398	8,885,626	9,086,447
Diluted weighted-average shares outstanding (in shares)	8,846,611	9,056,569	8,938,808	9,131,069
Service and Other Fees
Noninterest income:
Service and other fees	$ 339	$ 433	$ 1,092	$ 1,958

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Consolidated Statements of Comprehensive Income
Net income	$ 3,891	$ 4,162	$ 12,711	$ 13,233
Unrealized loss on securities	(1,114)		(1,991)	(3)
Amount reclassified from other comprehensive income				(273)
Total other comprehensive loss, net of tax	(1,114)		(1,991)	(276)
Comprehensive income	$ 2,777	$ 4,162	$ 10,720	$ 12,957

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, 2020	$ 95	$ 61,153	$ (3,915)	$ 200,066	$ (8,691)	$ 248,708
Balance (in shares) at Dec. 31, 2020	9,513,867
Increase (Decrease) in Stockholders' Equity
Net income				13,233		13,233
Other comprehensive loss					(276)	(276)
Cash dividends declared				(6,292)		(6,292)
Share-based compensation		241				241
Share-based compensation (in shares)	20,437
Allocation of ESOP shares		575	367			942
Repurchase of shares of common stock	$ (2)	(4,865)				(4,867)
Repurchase of shares of common stock (in shares)	(192,142)
Balance at Sep. 30, 2021	$ 93	57,104	(3,548)	207,007	(8,967)	251,689
Balance (in shares) at Sep. 30, 2021	9,342,162
Balance at Jun. 30, 2021	$ 94	58,860	(3,670)	204,928	(8,967)	251,245
Balance (in shares) at Jun. 30, 2021	9,421,560
Increase (Decrease) in Stockholders' Equity
Net income				4,162		4,162
Cash dividends declared				(2,083)		(2,083)
Share-based compensation		36				36
Allocation of ESOP shares		188	122			310
Repurchase of shares of common stock	$ (1)	(1,980)				(1,981)
Repurchase of shares of common stock (in shares)	(79,398)
Balance at Sep. 30, 2021	$ 93	57,104	(3,548)	207,007	(8,967)	251,689
Balance (in shares) at Sep. 30, 2021	9,342,162
Balance at Dec. 31, 2021	$ 93	56,951	(3,425)	208,227	(5,524)	256,322
Balance (in shares) at Dec. 31, 2021	9,324,060
Increase (Decrease) in Stockholders' Equity
Net income				12,711		12,711
Other comprehensive loss					(1,991)	(1,991)
Cash dividends declared				(6,151)		(6,151)
Share-based compensation		256				256
Share-based compensation (in shares)	19,227
Allocation of ESOP shares		467	367			834
Repurchase of shares of common stock	$ (2)	(5,234)				(5,236)
Repurchase of shares of common stock (in shares)	(229,619)
Balance at Sep. 30, 2022	$ 91	52,440	(3,058)	214,787	(7,515)	256,745
Balance (in shares) at Sep. 30, 2022	9,113,668
Balance at Jun. 30, 2022	$ 91	52,464	(3,181)	212,932	(6,401)	255,905
Balance (in shares) at Jun. 30, 2022	9,120,458
Increase (Decrease) in Stockholders' Equity
Net income				3,891		3,891
Other comprehensive loss					(1,114)	(1,114)
Cash dividends declared				(2,036)		(2,036)
Share-based compensation		(18)				(18)
Allocation of ESOP shares		135	123			258
Repurchase of shares of common stock		(141)				(141)
Repurchase of shares of common stock (in shares)	(6,790)
Balance at Sep. 30, 2022	$ 91	$ 52,440	$ (3,058)	$ 214,787	$ (7,515)	$ 256,745
Balance (in shares) at Sep. 30, 2022	9,113,668

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Consolidated Statements of Stockholders' Equity, Share Data
Cash dividends declared per common share (in dollars per share)	$ 0.23	$ 0.23	$ 0.69	$ 0.69
Common Stock
Consolidated Statements of Stockholders' Equity, Share Data
Allocation of ESOP shares, shares	12,233	12,233	36,700	36,700

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income	$ 12,711	$ 13,233
Adjustments to reconcile net income to net cash from operating activities:
Reversal of provision for loan losses	(603)	(1,452)
Depreciation and amortization	916	870
Deferred income tax expense	314	179
Amortization of fees, discounts, and premiums, net	(109)	(311)
Amortization of right-of-use asset	2,166	2,316
Origination of loans held for sale	(5,302)	(24,304)
Proceeds from sales of loans held for sale	5,299	26,595
Loss (gain) on sale of loans, net	3	(584)
Gain on sale of investment securities available for sale		(339)
Gain on sale of investment securities held to maturity		(1,501)
Net loss on disposal of premises and equipment		2
Gain on bank-owned life insurance	(1,138)
ESOP expense	834	942
Share-based compensation expense	256	241
Net (increase) decrease in accrued interest receivable	(275)	445
Net increase in bank-owned life insurance	(591)	(570)
Net decrease (increase) in prepaid expenses and other assets	156	(2,481)
Net decrease in accounts payable and accrued expenses	1,258	814
Net decrease in lease liability	(2,181)	(2,285)
Net decrease in advance payments by borrowers for taxes and insurance	(3,167)	(3,063)
Net increase in income taxes payable	821	35
Net cash from operating activities	11,368	8,782
Cash flows from investing activities:
Purchases of investment securities held to maturity	(132,612)	(474,439)
Purchases of investment securities available for sale	(24,760)
Principal repayments on investment securities held to maturity	51,609	78,547
Principal repayments on investment securities available for sale	948	198
Proceeds from sale of investment securities held to maturity		23,570
Proceeds from sale of investment securities available for sale		3,330
Principal repayments on loans receivable, net of loan originations	8,459	104,832
Purchases of Federal Home Loan Bank stock	(24)	(29)
Purchases of Federal Reserve Bank stock	(13)	(13)
Proceeds from bank-owned life insurance	5,569
Purchases of premises and equipment	(2,965)	(279)
Net cash from investing activities	(93,789)	(264,283)
Cash flows from financing activities:
Net (decrease) increase in deposits	30,025	5,163
Repurchases of common stock	(4,999)	(4,547)
Cash dividends paid	(6,178)	(7,272)
Net cash from financing activities	18,848	(6,656)
Net decrease in cash and cash equivalents	(63,573)	(262,157)
Cash and cash equivalents at beginning of the period	99,859	363,543
Cash and cash equivalents at end of the period	36,286	101,386
Cash paid for:
Interest on deposits and borrowings	2,345	4,966
Income taxes	2,355	4,617
Supplemental disclosure of noncash investing and financing activities:
Company stock repurchased through stock swap and net settlement transactions	237	320
Establishment of right-of-use asset, net of incentives and modifications	6,833	3,285
Establishment of lease liability, net of modifications	$ 6,833	$ 3,285

Organization

Organization	9 Months Ended
	Sep. 30, 2022
Organization
Organization	(1) Organization ​ Territorial Bancorp Inc. (the Company) is a Maryland corporation and is the holding company for Territorial Savings Bank (the Bank). Territorial Savings Bank is a Hawaii state-chartered bank headquartered in Honolulu, Hawaii and is a member of the Federal Reserve System. Territorial Savings Bank has an inactive subsidiary, Territorial Financial Services, Inc. During 2021, another inactive subsidiary, Territorial Real Estate Co., was dissolved.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2022
Basis of Presentation
Basis of Presentation	(2) 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, 2021. 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.

Recently Issued Accounting Pron

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

Cash and Cash Equivalents

Cash and Cash Equivalents	9 Months Ended
	Sep. 30, 2022
Cash and Cash Equivalents
Cash and Cash Equivalents	(4) Cash and Cash Equivalents ​ The table below presents the balances of cash and cash equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, (Dollars in thousands) 2022 2021 Cash and due from banks ​ $ 10,376 ​ $ 11,662 ​ ​ Interest-earning deposits in other banks ​ 25,910 ​ 88,197 ​ ​ Cash and cash equivalents ​ $ 36,286 ​ $ 99,859 ​ ​ ​ Interest-earning deposits in other banks consist primarily of deposits at the Federal Reserve Bank of San Francisco.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2022
Investment Securities.
Investment Securities	(5) Investment Securities ​ The amortized cost and fair values of investment securities are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated (Dollars in thousands) Cost Gains Losses Fair Value September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 23,856 ​ $ — $ (2,714) ​ $ 21,142 ​ Total ​ $ 23,856 ​ $ — $ (2,714) ​ $ 21,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 717,434 ​ $ — $ (131,682) ​ $ 585,752 ​ Total ​ $ 717,434 ​ $ — $ (131,682) ​ $ 585,752 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 636,442 ​ $ 5,699 $ (7,154) ​ $ 634,987 ​ Total ​ $ 636,442 ​ $ 5,699 $ (7,154) ​ $ 634,987 ​ ​ The amortized cost and estimated fair value of investment securities by maturity date at September 30, 2022 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 ​ $ 23,856 ​ $ 21,142 ​ Total ​ $ 23,856 ​ $ 21,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ Due within 5 years ​ $ 15 ​ $ 14 ​ Due after 5 years through 10 years ​ 19 ​ 18 ​ Due after 10 years ​ 717,400 ​ 585,720 ​ Total ​ $ 717,434 ​ $ 585,752 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized gains and losses and the proceeds from sales of held-to-maturity and available-for-sale securities are shown in the table below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ ​ September 30, ​ September 30, ​ (Dollars in thousands) 2022 2021 2022 2021 Proceeds from sales ​ $ — ​ $ 7,539 ​ $ — ​ $ 26,900 ​ Gross gains ​ — ​ 403 ​ — ​ 1,840 ​ Gross losses ​ — ​ — ​ — ​ — ​ ​ The Company did not sell any held-to-maturity mortgage-backed securities during the nine months ended September 30, 2022. During the nine months ended September 30, 2021, the Company sold $22.1 million of held-to-maturity mortgage-backed securities and recorded gains of $1.5 million. The sale of the mortgage-backed securities, for which the Company had already collected a substantial portion of the outstanding purchased principal (at least 85%), was in accordance with the Investments – Debt and Equity Securities topic of the FASB ASC and did not taint management’s assertion of its intent to hold the remaining securities in the held-to-maturity portfolio to maturity. ​ The Company did not sell any available-for-sale mortgage-backed securities during the nine months ended September 30, 2022. During the nine months ended September 30, 2021, the Company sold $3.0 million of available-for-sale mortgage-backed securities and recorded a gain of $339,000. ​ Investment securities with amortized costs of $241.0 million and $140.6 million at September 30, 2022 and December 31, 2021, respectively, were pledged to secure deposits made by state and local governments, securities sold under agreements to repurchase and transaction clearing accounts. ​ Provided below is a summary of investment securities which were in an unrealized loss position at September 30, 2022 and December 31, 2021. The Company does not intend to sell securities until such time as the value recovers or the securities mature and it is not more likely than not that the Company will be required to sell the securities prior to recovery of value or the securities mature. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months 12 Months or Longer Total Unrealized Unrealized Number of Unrealized Description of securities Fair Value Losses Fair Value Losses Securities Fair Value Losses (Dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 21,142 ​ $ (2,714) ​ $ — ​ $ — 4 ​ $ 21,142 ​ $ (2,714) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 259,897 ​ $ (38,335) ​ $ 325,850 ​ $ (93,347) 146 ​ $ 585,747 ​ $ (131,682) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 482,629 ​ $ (6,976) ​ $ 3,681 ​ $ (178) 43 ​ $ 486,310 ​ $ (7,154) ​ ​ 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, and the Company does not intend to sell these investments until maturity and it is not more likely than not that the Company will be required to sell such investments prior to recovery of its cost basis, the Company does not consider these investments to be other-than-temporarily impaired as of September 30, 2022 and December 31, 2021.

Loans Receivable and Allowance

Loans Receivable and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2022
Loans Receivable and Allowance for Loan Losses
Loans Receivable and Allowance for Loan Losses	(6) Loans Receivable and Allowance for Loan Losses ​ The components of loans receivable are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ (Dollars in thousands) 2022 2021 Real estate loans: ​ ​ ​ ​ ​ ​ ​ First mortgages: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential ​ $ 1,256,304 ​ $ 1,267,537 ​ Multi-family residential ​ 3,946 ​ 5,468 ​ Construction, commercial and other ​ 23,035 ​ 18,590 ​ Home equity loans and lines of credit ​ 7,229 ​ 7,121 ​ Total real estate loans ​ 1,290,514 ​ 1,298,716 ​ Other loans: ​ ​ ​ ​ ​ ​ ​ Loans on deposit accounts ​ 217 ​ 278 ​ Consumer and other loans ​ 8,496 ​ 8,192 ​ Total other loans ​ 8,713 ​ 8,470 ​ Less: ​ ​ ​ ​ ​ ​ ​ Net unearned fees and discounts ​ (2,168) ​ (1,693) ​ Allowance for loan losses ​ (2,015) ​ (2,669) ​ Total unearned fees, discounts and allowance for loan losses ​ (4,183) ​ (4,362) ​ Loans receivable, net ​ $ 1,295,044 ​ $ 1,302,824 ​ ​ The table below presents the activity in the allowance for loan losses by portfolio segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals Three months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,350 ​ $ 445 ​ $ 1 ​ $ 82 ​ $ 253 ​ $ 2,131 ​ (Reversal of provision) provision for loan losses ​ (87) ​ (3) ​ — ​ 1 ​ (20) ​ (109) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 83 ​ 233 ​ 2,022 ​ Charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Recoveries ​ — ​ — ​ — ​ — ​ — ​ — ​ Net charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,814 ​ $ 435 ​ $ 1 ​ $ 89 ​ $ 330 ​ $ 2,669 ​ (Reversal of provision) provision for loan losses ​ (551) ​ 7 ​ — ​ 38 ​ (97) ​ (603) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 127 ​ 233 ​ 2,066 ​ Charge-offs ​ — ​ — ​ — ​ (52) ​ — ​ (52) ​ Recoveries ​ — ​ — ​ — ​ 1 ​ — ​ 1 ​ Net charge-offs ​ — ​ — ​ — ​ (51) ​ — ​ (51) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals Three months ended September 30, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 2,021 ​ $ 434 ​ $ 1 ​ $ 133 ​ $ 380 ​ $ 2,969 ​ (Reversal of provision) provision for loan losses ​ (132) ​ 11 ​ — ​ (19) ​ (27) ​ (167) ​ ​ ​ 1,889 ​ 445 ​ 1 ​ 114 ​ 353 ​ 2,802 ​ Charge-offs ​ — ​ — ​ — ​ (3) ​ — ​ (3) ​ Recoveries ​ — ​ — ​ — ​ — ​ — ​ — ​ Net charge-offs ​ — ​ — ​ — ​ (3) ​ — ​ (3) ​ Balance, end of period ​ $ 1,889 ​ $ 445 ​ $ 1 ​ $ 111 ​ $ 353 ​ $ 2,799 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 3,102 ​ $ 406 ​ $ 1 ​ $ 146 ​ $ 607 ​ $ 4,262 ​ (Reversal of provision) provision for loan losses ​ (1,213) ​ 39 ​ — ​ (24) ​ (254) ​ (1,452) ​ ​ ​ 1,889 ​ 445 ​ 1 ​ 122 ​ 353 ​ 2,810 ​ Charge-offs ​ — ​ — ​ — ​ (13) ​ — ​ (13) ​ Recoveries ​ — ​ — ​ — ​ 2 ​ — ​ 2 ​ Net charge-offs ​ — ​ — ​ — ​ (11) ​ — ​ (11) ​ Balance, end of period ​ $ 1,889 ​ $ 445 ​ $ 1 ​ $ 111 ​ $ 353 ​ $ 2,799 ​ ​ Management considers the allowance for loan losses at September 30, 2022 to be at an appropriate level to provide for probable losses that can be reasonably estimated based on general and specific conditions at that date. While the Company uses the best information it has available to make evaluations, future adjustments to the allowance may be necessary if conditions differ substantially from the information used in making the evaluations. To the extent actual outcomes differ from the estimates, additional provisions for credit losses may be required that would reduce future earnings. ​ The table below presents the balance in the allowance for loan losses and the recorded investment in loans, net of unearned fees and discounts, by portfolio segment and based on impairment method: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending allowance balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ Collectively evaluated for impairment ​ 1,263 ​ 442 ​ 1 ​ 76 ​ 233 ​ 2,015 ​ Total ending allowance balance ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending loan balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 2,402 ​ $ — ​ $ 16 ​ $ — ​ $ — ​ $ 2,418 ​ Collectively evaluated for impairment ​ 1,255,802 ​ 22,907 ​ 7,215 ​ 8,717 ​ — ​ 1,294,641 ​ Total ending loan balance ​ $ 1,258,204 ​ $ 22,907 ​ $ 7,231 ​ $ 8,717 ​ $ — ​ $ 1,297,059 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending allowance balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ Collectively evaluated for impairment ​ 1,814 ​ 435 ​ 1 ​ 89 ​ 330 ​ 2,669 ​ Total ending allowance balance ​ $ 1,814 ​ $ 435 ​ $ 1 ​ $ 89 ​ $ 330 ​ $ 2,669 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending loan balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 3,812 ​ $ — ​ $ 19 ​ $ — ​ $ — ​ $ 3,831 ​ Collectively evaluated for impairment ​ 1,267,560 ​ 18,529 ​ 7,103 ​ 8,470 ​ — ​ 1,301,662 ​ Total ending loan balance ​ $ 1,271,372 ​ $ 18,529 ​ $ 7,122 ​ $ 8,470 ​ $ — ​ $ 1,305,493 ​ ​ The table below presents the balance of impaired loans individually evaluated for impairment by class of loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid Recorded Principal (Dollars in thousands) Investment Balance September 30, 2022: ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,402 ​ $ 2,897 ​ Home equity loans and lines of credit ​ 16 ​ 30 ​ Total ​ $ 2,418 ​ $ 2,927 ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 3,812 ​ $ 4,299 ​ Home equity loans and lines of credit ​ ​ 19 ​ ​ 31 ​ Total ​ $ 3,831 ​ $ 4,330 ​ ​ The table below presents the average recorded investment and interest income recognized on impaired loans by class of loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Three Months Ended For the Nine Months Ended September 30, September 30, Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized 2022: ​ ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,431 ​ $ 6 ​ $ 2,465 ​ $ 18 ​ Home equity loans and lines of credit ​ 17 ​ — ​ 18 ​ ​ ​ Total ​ $ 2,448 ​ $ 6 ​ $ 2,483 ​ $ 18 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 4,816 ​ $ 8 ​ $ 4,866 ​ $ 28 ​ Home equity loans and lines of credit ​ ​ 20 ​ — ​ 21 ​ — ​ Total ​ $ 4,836 ​ $ 8 ​ $ 4,887 ​ $ 28 ​ ​ There were no loans individually evaluated for impairment with a related allowance for loan loss as of September 30, 2022 or December 31, 2021. Loans individually evaluated for impairment do not have an allocated allowance for loan loss because they are written down to fair value at the time of impairment. An impaired loan would also not have an allocated allowance if the value of the property securing the loan, less the cost to sell the property, is greater than the loan balance. ​ The Company had 11 nonaccrual loans with a book value of $2.0 million as of September 30, 2022 and 10 nonaccrual loans with a book value of $3.3 million as of December 31, 2021. The Company did t have any loans 90 days or more past due and still accruing interest as of September 30, 2022. The Company had ​ The table below presents the aging of loans and accrual status by class of loans, net of unearned fees and discounts. Loans with a formal loan payment deferral plan in place are not considered contractually past due or delinquent if the borrower is in compliance with the loan payment deferral plan. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans 90 Days or More 30 - 59 60 - 89 90 Days or Past Due Days Past Days Past More Total Past Loans Not Total Nonaccrual and Still (Dollars in thousands) Due Due Past Due Due Past Due Loans Loans Accruing September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 737 ​ $ — ​ $ 227 ​ $ 964 ​ $ 1,253,298 ​ $ 1,254,262 ​ $ 1,985 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 3,942 ​ 3,942 ​ — ​ — ​ Construction, commercial and other mortgages ​ — ​ — ​ — ​ — ​ 22,907 ​ 22,907 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,231 ​ 7,231 ​ 16 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 217 ​ 217 ​ — ​ — ​ Consumer and other ​ 2 ​ 4 ​ — ​ 6 ​ 8,494 ​ 8,500 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 739 ​ $ 4 ​ $ 227 ​ $ 970 ​ $ 1,296,089 ​ $ 1,297,059 ​ $ 2,001 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 129 ​ $ — ​ $ 244 ​ $ 373 ​ $ 1,265,540 ​ $ 1,265,913 ​ $ 3,261 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,459 ​ 5,459 ​ — ​ — ​ Construction, commercial and other mortgages ​ — ​ — ​ — ​ — ​ 18,529 ​ 18,529 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,122 ​ 7,122 ​ 19 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 278 ​ 278 ​ — ​ — ​ Consumer and other ​ 3 ​ — ​ 24 ​ 27 ​ 8,165 ​ 8,192 ​ — ​ 24 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 132 ​ $ — ​ $ 268 ​ $ 400 ​ $ 1,305,093 ​ $ 1,305,493 ​ $ 3,280 ​ $ 24 ​ ​ ​ The Company primarily uses the aging of loans and accrual status to monitor the credit quality of its loan portfolio. 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. ​ There were no loans modified in a troubled debt restructuring during the nine months ended September 30, 2022 or 2021. There were new troubled debt restructurings during the nine months ended September 30, 2022 or 2021 that subsequently defaulted. Loan modifications under the CARES Act and the Interagency Statements issued by bank regulators in 2020 are discussed below. ​ The table below summarizes outstanding troubled debt restructurings by class of loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Number of Accrual Number of Nonaccrual ​ (Dollars in thousands) Loans Status Loans Status Total September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ 2 ​ $ 417 ​ ​ 2 ​ $ 424 ​ $ 841 Total ​ 2 ​ $ 417 ​ ​ 2 ​ $ 424 ​ $ 841 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ 3 ​ $ 551 ​ ​ 1 ​ $ 340 ​ $ 891 Total ​ 3 ​ $ 551 ​ ​ 1 ​ $ 340 ​ $ 891 ​ There were no delinquent troubled debt restructurings at September 30, 2022. There was that was 59 days delinquent as of December 31, 2021. Restructurings include deferrals of interest and/or principal payments and temporary or permanent reductions in interest rates due to the financial difficulties of the borrowers. At September 30, 2022, we had ​ The CARES Act provides relief to financial institutions from categorizing eligible loan modifications as troubled debt restructurings over the remaining life of the modified loan. Eligible loan modifications under the CARES Act were required to be related to the COVID-19 pandemic and the borrower’s payments must not have been more than 30 days past due as of December 31, 2019. Loan modifications under the CARES Act must have been executed during the period from March 1, 2020 to January 1, 2022. Banking regulators issued similar guidance, which also clarified that a COVID-19 related loan modification should not be considered a troubled debt restructuring if the borrower was not more than 30 days past due on payments at the time the loan modification program was implemented and the modification is considered short-term (not to exceed six months). The Company uses the provisions of the CARES Act and the Interagency Statements to account for the eligible loans receiving modifications. ​ The Company has granted loan payment deferrals to borrowers who have been affected by the COVID-19 pandemic. Loans are removed from the loan payment deferral program when interest which was accrued during the deferral payment period is paid off. The table below summarizes loans remaining in the loan payment deferral program by class of loan: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022 ​ ​ ​ December 31, 2021 ​ (Dollars in thousands) ​ Loans in the Loan Payment Deferral Program ​ Percent of Total Loans ​ Loans in the Loan Payment Deferral Program ​ Percent of Total Loans One- to- four family residential mortgage ​ $ 62,027 ​ 4.8 % ​ $ 74,704 ​ 5.7 % Non-residential mortgage ​ ​ 3,431 ​ 0.3 ​ ​ ​ 3,928 ​ 0.3 ​ Total ​ $ 65,458 ​ 5.1 % ​ $ 78,632 ​ 6.0 % ​ The loans on which the Company has granted loan payment deferrals are included in the allowance for loan and lease losses calculation. However, loans performing under a loan payment deferral agreement are not considered contractually past due and are excluded from the past due statistics above. ​ The ratio of the current loan balance to the current tax-assessed value of the property securing the mortgage loans in the payment deferral program averaged 49.7% at September 30, 2022. At September 30, 2022, one- to four family residential mortgage loans represented 97.0% of the Company’s total loan portfolio balance with a ratio of the current loan balance to the current tax assessed value of the property securing these loans averaging 42.4%. All of the Company’s residential mortgage loans are secured by real estate in Hawaii. ​ As of September 30, 2022, of the $62.0 million total one- to four-family mortgage loans in the loan payment deferral program, $61.6 million, or 99.4% , had resumed making full principal and interest payments. The interest on these loans that accrued during the deferral period will be repaid over subsequent years. one- to four family mortgage loans in the loan payment deferral program were making interest-only payments. In the loan payment deferral program, there was one $145,000 one- to four-family mortgage loan which was over 150 days delinquent. At September 30, 2022, there were no other loans which have had their deferral period end and not resumed their loan payments. ​ As of September 30, 2022, all of the $3.4 million of commercial mortgage, commercial and industrial and home equity lines of credit in the loan payment deferral program had resumed making full principal and interest payments. ​ Since the beginning of the year, there has not been a significant increase in loan delinquencies, significant changes in deposits or significant drawdowns on any lines of credit. We do not have any commercial loans to hotels, businesses in the transportation industry, restaurants or retail establishments. ​ The Company had no real estate owned as of September 30, 2022 or December 31, 2021. There were two one- to four-family residential mortgage loans totaling in the process of foreclosure at September 30, 2022. There were ​ Nearly all of our real estate loans are collateralized by real estate located in the State of Hawaii. Loan-to-value ratios on these real estate loans generally do not exceed ​ During the nine months ended September 30, 2022 and 2021, the Company sold mortgage loans held for sale with principal balances of $5.4 million and $26.2 million, respectively, and recognized a loss of $3,000 and a gain of $584,000 , respectively. The Company had ​ The Company serviced loans for others with principal balances of $36.9 million at September 30, 2022 and $41.3 million at December 31, 2021. Of these amounts, $21.4 million and $24.3 million of loan balances relate to securitizations for which the Company continues to hold the related mortgage-backed securities at September 30, 2022 and December 31, 2021, respectively. The amount of contractually specified servicing fees earned for the nine months ended September 30, 2022 and 2021 was $77,000 and $99,000 , respectively. The amount of contractually specified servicing fees earned for the three months ended September 30, 2022 and 2021 was $24,000 and $31,000 , respectively. The fees are reported in service and other fees in the Consolidated Statements of Income.

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Sep. 30, 2022
Securities Sold Under Agreements to Repurchase
Securities Sold Under Agreements to Repurchase	(7) Securities Sold Under Agreements to Repurchase ​ Securities sold under agreements to repurchase are treated as financings and the obligations to repurchase the identical securities sold are reflected as a liability with the securities collateralizing the agreements classified as an asset. Securities sold under agreements to repurchase are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022 December 31, 2021 Weighted Weighted Repurchase Average Repurchase Average (Dollars in thousands) Liability Rate Liability Rate Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Over 2 years to 3 years ​ $ 10,000 1.81 % $ 5,000 1.88 % Over 3 years to 4 years ​ — — ​ ​ 5,000 1.73 % Total ​ $ 10,000 1.81 % $ 10,000 1.81 % ​ Below is a summary comparing the carrying value and fair value of securities pledged to secure repurchase agreements, the repurchase liability, and the amount at risk at September 30, 2022. 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-sponsored enterprises. The repurchase liability cannot exceed of the fair value of securities pledged. 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 ​ $ 13,813 ​ $ 11,411 ​ $ 10,000 ​ $ 3,813 27 ​ ​

Offsetting of Financial Liabili

Offsetting of Financial Liabilities	9 Months Ended
	Sep. 30, 2022
Offsetting of Financial Liabilities
Offsetting of Financial Liabilities	(8) Offsetting of Financial Liabilities ​ The following table presents our securities sold under agreements to repurchase that are subject to a right of offset in the event of default. See Note 7, Securities Sold Under Agreements to Repurchase, for additional information. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Amount of Gross Amount Not Offset in the Gross Amount Gross Amount Liabilities Balance Sheet of Recognized Offset in the Presented in the Financial Cash Collateral (Dollars in thousands) Liabilities Balance Sheet Balance Sheet Instruments ​ Pledged Net Amount September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​

Employee Stock Ownership Plan

Employee Stock Ownership Plan	9 Months Ended
	Sep. 30, 2022
Employee Stock Ownership Plan
Employee Stock Ownership Plan
Employee Stock Ownership Plan	(9) Employee Stock Ownership Plan ​ Effective January 1, 2009, Territorial Savings Bank adopted an Employee Stock Ownership Plan (ESOP) for eligible employees. The ESOP borrowed , of the total number of shares issued by the Company in its initial public offering. The shares were acquired at a price of ​ The loan is secured by the shares purchased with the loan proceeds and will be repaid by the ESOP over the 20-year term of the loan with funds from Territorial Savings Bank’s contributions to the ESOP and dividends payable on the shares. The interest rate on the ESOP loan is an adjustable rate equal to the prime rate, as published in The Wall Street Journal . The interest rate adjusts annually and will be the prime rate on the first business day of the calendar year. ​ Shares purchased by the ESOP are held by a trustee in an unallocated suspense account, and shares are released annually from the suspense account on a pro-rata basis as principal and interest payments are made by the ESOP to the Company. The trustee allocates the shares released among participants on the basis of each participant’s proportional share of compensation relative to all participants. As shares are committed to be released from the suspense account, Territorial Savings Bank reports compensation expense based on the average fair value of shares released with a corresponding credit to stockholders’ equity. The shares committed to be released are considered outstanding for earnings per share computations. Compensation expense recognized for the three months ended September 30, 2022 and 2021 amounted to , respectively. ​ Shares held by the ESOP trust were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, 2022 2021 Allocated shares ​ 571,241 ​ 540,869 ​ ​ Unearned shares ​ 305,831 ​ 342,531 ​ ​ Total ESOP shares ​ 877,072 ​ 883,400 ​ ​ Fair value of unearned shares, in thousands ​ $ 5,670 ​ $ 8,649 ​ ​ ​ 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 September 30, 2022 and 2021, we accrued , respectively, for the ESOP restoration plan.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2022
2010 Equity Incentive Plan
Share-Based Compensation
Share-Based Compensation	(10) Share-Based Compensation ​ The shareholders of Territorial Bancorp Inc. have 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 fair value of time-based stock options is estimated using a Black-Scholes option pricing model using assumptions for dividend yield, stock price volatility, risk-free interest rate and option term. These assumptions are based on our judgments regarding future events, are subjective in nature, and cannot be determined with precision. The cost of the awards will be recognized on a straight-line basis over the three , five - or six-year vesting period during which participants are required to provide services in exchange for the awards. No new awards can be made under the 2010 Equity Plan, but awards previously made can continue to vest. There are 146,347 shares remaining available for new awards under the 2019 Equity Plan. ​ The Company recognized compensation expense, measured as the fair value of the share-based award on the date of grant, on a straight-line basis over the vesting period. Share-based compensation is recorded in the Consolidated Statements of Income as a component of salaries and employee benefits with a corresponding increase in stockholders’ equity. The table below presents information on compensation expense and the related tax benefit for all share-based awards: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, (In thousands) 2022 2021 2022 2021 Compensation expense ​ $ (18) ​ $ 36 ​ $ 256 ​ $ 241 ​ Income tax benefit ​ (5) ​ 10 ​ 70 ​ 66 ​ ​ Share-based compensation expense and the income tax benefit had credit balances during the three months ended September 30, 2022. The credit balance occurred when the number of performance-based restricted stock units (PRSUs), which are based on a performance condition, decreased when the Company’s three-year return on average equity declined in comparison to a peer group of banks. Stock Options ​ The table below presents the stock option activity for the nine months ended September 30, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Aggregate ​ ​ ​ ​ Average ​ Remaining ​ Intrinsic ​ ​ ​ ​ Exercise ​ Contractual ​ Value ​ ​ Options ​ Price ​ Life (years) ​ (in thousands) Options outstanding at December 31, 2021 3,085 ​ $ 23.62 0.67 ​ $ 5 ​ Granted — ​ — — ​ — ​ Exercised — ​ — — ​ — ​ Forfeited — ​ — — ​ — ​ Expired 3,085 ​ — — ​ — ​ Options outstanding at September 30, 2022 ​ — ​ $ — — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options outstanding at December 31, 2020 3,085 ​ $ 23.62 1.67 ​ $ 1 ​ Granted — ​ — — ​ — ​ Exercised — ​ — — ​ — ​ Forfeited — ​ — — ​ — ​ Expired — ​ — — ​ — ​ Options outstanding at September 30, 2021 3,085 ​ $ 23.62 0.92 ​ $ 5 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options vested and exercisable at September 30, 2022 — ​ $ — — ​ $ — ​ ​ There were no options exercised or vested during the nine months ended September 30, 2022 or 2021. As of September 30, 2022, the Company had ​ 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, 2021 23,208 ​ $ 24.61 ​ Granted 12,013 ​ 23.77 ​ Vested 11,557 ​ 24.68 ​ Forfeited — ​ — ​ Unvested at September 30, 2022 23,664 ​ $ 24.15 ​ ​ ​ ​ ​ ​ ​ ​ Unvested at December 31, 2020 23,695 ​ $ 24.24 ​ Granted 10,849 ​ 26.67 ​ Vested 11,336 ​ 25.81 ​ Forfeited — ​ — ​ Unvested at September 30, 2021 23,208 ​ $ 24.61 ​ ​ As of September 30, 2022, the Company had $425,000 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, 2021 41,583 ​ $ 24.68 Granted 14,412 ​ 23.77 Vested 7,670 ​ 27.30 Forfeited 4,768 ​ 27.30 Unvested at September 30, 2022 43,557 ​ $ 23.63 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2020 40,585 ​ $ 25.83 Granted 13,016 ​ 26.67 Vested 7,473 ​ 30.73 Forfeited 4,545 ​ 30.73 Unvested at September 30, 2021 41,583 ​ $ 24.68 ​ The fair value of these PRSUs is based on the fair value of the Company’s stock on the date of grant. As of September 30, 2022, the Company had $131,000 of unrecognized compensation costs related to these PRSUs. 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, 2021 10,396 ​ $ 24.03 Granted 3,603 ​ ​ 24.42 Vested — ​ — Forfeited 3,110 ​ 24.45 Unvested at September 30, 2022 10,889 ​ $ 24.04 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2020 10,147 ​ $ 24.69 Granted 3,254 ​ ​ 25.94 Vested 1,628 ​ 28.32 Forfeited 1,377 ​ 28.32 Unvested at September 30, 2021 10,396 ​ $ 24.03 ​ As of September 30, 2022, the Company had $85,000 of unrecognized compensation costs related to the PRSUs that are based on a market condition. The market value of PRSUs that will vest on a market condition is determined by a Monte Carlo valuation of the Company’s stock as of the grant date. Performance will be measured over a three-year performance period and will be cliff vested. The market condition is measured quarterly by comparing the Company’s three-year average total stock return to a peer group of other banks. The Company’s percentile ranking in the peer group determines how many PRSUs will vest.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2022
Earnings Per Share
Earnings Per Share	(11) Earnings Per Share ​ Holders of unvested restricted stock accrue dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Unvested restricted stock awards that are time-based contain nonforfeitable rights to dividends or dividend equivalents and are considered to be participating securities in the earnings per share computation using the two-class method. Under the two-class method, earnings are allocated to common shareholders and participating securities according to their respective rights to earnings. Unvested restricted stock awards that vest based on performance or market conditions are not considered to be participating securities in the earnings per share calculation because accrued dividends on shares that do not vest are forfeited. ​ The table below presents the information used to compute basic and diluted earnings per share: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, ​ (Dollars in thousands, except per share data) 2022 2021 2022 2021 Net income ​ $ 3,891 ​ $ 4,162 ​ $ 12,711 ​ $ 13,233 ​ ​ Income allocated to participating securities ​ ​ (23) ​ ​ (23) ​ ​ (70) ​ ​ (47) ​ ​ Net income available to common shareholders ​ $ 3,868 ​ $ 4,139 ​ $ 12,641 ​ $ 13,186 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average number of shares used in: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per share ​ 8,802,010 ​ 9,012,398 ​ 8,885,626 ​ 9,086,447 ​ ​ Dilutive common stock equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options and restricted stock units ​ 44,601 ​ 44,171 ​ 53,182 ​ 44,622 ​ ​ Diluted earnings per share ​ 8,846,611 ​ 9,056,569 ​ 8,938,808 ​ 9,131,069 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income per common share, basic ​ $ 0.44 ​ $ 0.46 ​ $ 1.42 ​ $ 1.45 ​ ​ Net income per common share, diluted ​ $ 0.44 ​ $ 0.46 ​ $ 1.41 ​ $ 1.44 ​ ​ ​

Other Comprehensive Loss

Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2022
Other Comprehensive Loss
Other Comprehensive Loss	(12) Other Comprehensive Loss ​ The table below presents the changes in the components of accumulated other comprehensive loss, net of taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unfunded Unrealized Pension (Gain)/Loss on (Dollars in thousands) Liability Securities Total Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ 877 ​ $ 6,401 ​ Other comprehensive loss, net of taxes ​ ​ — ​ 1,114 ​ 1,114 ​ Net current period other comprehensive loss ​ — ​ 1,114 ​ 1,114 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 8,967 ​ $ — ​ $ 8,967 ​ Net current period other comprehensive loss ​ — ​ — ​ — ​ Balances at end of period ​ $ 8,967 ​ $ — ​ $ 8,967 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ — ​ $ 5,524 ​ Other comprehensive loss, net of taxes ​ — ​ 1,991 ​ 1,991 ​ Net current period other comprehensive loss ​ — ​ 1,991 ​ 1,991 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 8,967 ​ $ (276) ​ $ 8,691 ​ Other comprehensive loss, net of taxes ​ ​ — ​ ​ 3 ​ ​ 3 ​ Amounts reclassified from other comprehensive income, net of taxes ​ — ​ 273 ​ 273 ​ Net current period other comprehensive loss ​ — ​ 276 ​ 276 ​ Balances at end of period ​ $ 8,967 ​ $ — ​ $ 8,967 ​ ​ The table below presents the tax effect on each component of accumulated other comprehensive loss: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2022 2021 Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ $ — ​ $ — ​ $ — ​ Total ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended September 30, ​ 2022 2021 ​ Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ $ 4 ​ $ (1) ​ $ 3 ​ Amount reclassified from other comprehensive income ​ ​ — ​ ​ — ​ ​ — ​ ​ 373 ​ ​ (100) ​ ​ 273 ​ Total ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ $ 377 ​ $ (101) ​ $ 276 ​ ​ ​

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2022
Revenue Recognition
Revenue Recognition	(13) Revenue Recognition ​ The Company’s contracts with customers are generally short-term in nature, with cycles of one year or less. These can range from an immediate term for services such as wire transfers, foreign currency exchanges and cashier’s check purchases, to several days for services such as processing annuity and mutual fund sales. Some contracts may be of an ongoing nature, such as providing deposit account services, including ATM access, check processing, account analysis and check ordering. However, provision of an assessable service and payment for such service is usually concurrent or closely timed. Contracts related to financial instruments, such as loans, investments and debt, are excluded from the scope of this reporting requirement. ​ After analyzing the Company’s revenue sources, including the amount of revenue received, the timing of services rendered and the timing of payment for these services, the Company has determined that the rendering of services and the payment for such services are generally closely matched. Any differences are not material to the Company’s Consolidated Financial Statements. Accordingly, the Company generally records income when payment for services is received. ​ Revenue from contracts with customers is reported in service and other fees in other noninterest income in the Consolidated Statements of Income. The table below reconciles the revenue from contracts with customers and other revenue reported in those line items: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Service and ​ ​ ​ ​ (Dollars in thousands) Other Fees Other Total Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 304 ​ $ 38 ​ $ 342 Other revenue ​ ​ 35 ​ ​ 38 ​ ​ 73 Total ​ $ 339 ​ $ 76 ​ $ 415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 399 ​ $ 30 ​ $ 429 Other revenue ​ ​ 34 ​ ​ 27 ​ ​ 61 Total ​ $ 433 ​ $ 57 ​ $ 490 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 989 ​ $ 138 ​ $ 1,127 Other revenue ​ ​ 103 ​ ​ 1,221 ​ ​ 1,324 Total ​ $ 1,092 ​ $ 1,359 ​ $ 2,451 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 1,855 ​ $ 154 ​ $ 2,009 Other revenue ​ ​ 103 ​ ​ 83 ​ ​ 186 Total ​ $ 1,958 ​ $ 237 ​ $ 2,195 ​

Leases

Leases	9 Months Ended
	Sep. 30, 2022
Leases
Leases	​ (14) Leases ​ The table below presents lease costs and other information for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ September 30, September 30, (Dollars in thousands) 2022 2021 2022 2021 Lease costs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease costs ​ $ 712 ​ $ 843 ​ $ 2,211 ​ $ 2,552 ​ Short-term lease costs ​ 107 ​ 15 ​ 199 ​ 32 ​ Variable lease costs ​ 49 ​ 31 ​ 127 ​ 113 ​ Total lease costs ​ $ 868 ​ $ 889 ​ $ 2,537 ​ $ 2,697 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash paid for amounts included in measurement of lease liabilities ​ $ 854 ​ $ 836 ​ $ 2,381 ​ $ 2,520 ​ ROU assets obtained in exchange for new operating lease liabilities ​ $ 2,003 ​ $ 444 ​ $ 6,833 ​ $ 3,285 ​ ​ At September 30, 2022, future minimum rental commitments under noncancellable operating leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ $ 713 ​ ​ ​ ​ ​ ​ 2023 ​ 2,787 ​ ​ ​ ​ ​ ​ 2024 ​ 2,651 ​ ​ ​ ​ ​ ​ 2025 ​ 2,031 ​ ​ ​ ​ ​ ​ 2026 ​ 1,868 ​ ​ ​ ​ ​ ​ Thereafter ​ 12,789 ​ ​ ​ ​ ​ ​ Total ​ ​ 22,839 ​ ​ ​ ​ ​ ​ Less lease incentives to be received in 2022 ​ ​ (4,996) ​ ​ ​ ​ ​ ​ Less present value discount ​ ​ (2,447) ​ ​ ​ ​ ​ ​ Present value of leases ​ $ 15,396 ​ ​ ​ ​ ​ ​ ​ The table below presents other lease related information: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ ​ September 30, ​ ​ ​ 2022 ​ 2021 ​ Weighted-average remaining lease term (years) ​ 9.03 ​ ​ 5.95 ​ ​ Weighted-average discount rate ​ ​ 2.04 % ​ ​ 2.18 % ​ ​

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2022
Fair Value
Fair Value	(15) 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, impaired loans and investments, and mortgage servicing assets. These nonrecurring fair value adjustments typically involve application of the lower of cost or fair value accounting or write-downs of individual assets. ​ Investment Securities Available for Sale. ​ Interest Rate Contracts. The Company may enter into interest rate lock commitments with borrowers on loans intended to be sold. To manage interest rate risk on the lock commitments, the Company may also enter into forward loan sale commitments. The interest rate lock commitments and forward loan sale commitments are treated as derivatives and are recorded at their fair value determined by referring to prices quoted in the secondary market for similar contracts. The fair value inputs are considered Level 2 inputs. Interest rate contracts that are classified as assets are included with prepaid expenses and other assets on the Consolidated Balance Sheet while interest rate contracts that are classified as liabilities are included with accounts payable and accrued expenses. ​ The estimated fair values of the Company’s financial instruments are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ ​ ​ ​ Fair Value Measurements Using (Dollars in thousands) Amount Fair Value Level 1 Level 2 Level 3 September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 36,286 ​ $ 36,286 ​ $ 36,286 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 21,142 ​ ​ 21,142 ​ ​ — ​ ​ 21,142 ​ ​ — ​ Investment securities held to maturity ​ 717,434 ​ ​ 585,752 ​ ​ — ​ ​ 585,752 ​ ​ — ​ Loans receivable, net ​ 1,295,044 ​ ​ 1,145,828 ​ ​ — ​ ​ — ​ ​ 1,145,828 ​ FHLB stock ​ 8,197 ​ ​ 8,197 ​ ​ — ​ ​ 8,197 ​ ​ — ​ FRB stock ​ ​ 3,171 ​ ​ 3,171 ​ ​ — ​ ​ 3,171 ​ ​ — ​ Accrued interest receivable ​ 6,061 ​ ​ 6,061 ​ ​ 32 ​ ​ 1,521 ​ ​ 4,508 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,711,853 ​ ​ 1,705,405 ​ ​ — ​ ​ 1,376,636 ​ ​ 328,769 ​ Advances from the Federal Home Loan Bank ​ 141,000 ​ ​ 132,781 ​ ​ — ​ ​ 132,781 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,423 ​ ​ — ​ ​ 9,423 ​ ​ — ​ Accrued interest payable ​ 351 ​ ​ 351 ​ ​ — ​ ​ 65 ​ ​ 286 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 99,859 ​ $ 99,859 ​ $ 99,859 ​ $ — ​ $ — ​ Investment securities held to maturity ​ 636,442 ​ ​ 634,987 ​ ​ — ​ ​ 634,987 ​ ​ — ​ Loans receivable, net ​ 1,302,824 ​ ​ 1,314,609 ​ ​ — ​ ​ — ​ ​ 1,314,609 ​ FHLB stock ​ 8,173 ​ ​ 8,173 ​ ​ — ​ ​ 8,173 ​ ​ — ​ FRB stock ​ ​ 3,158 ​ ​ 3,158 ​ ​ — ​ ​ 3,158 ​ ​ — ​ Accrued interest receivable ​ 5,786 ​ ​ 5,786 ​ ​ 16 ​ ​ 1,126 ​ ​ 4,644 ​ Interest rate contracts ​ 9 ​ ​ 9 ​ ​ — ​ ​ 9 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,681,828 ​ ​ 1,682,078 ​ ​ — ​ ​ 1,456,773 ​ ​ 225,305 ​ Advances from the Federal Home Loan Bank ​ 141,000 ​ ​ 141,867 ​ ​ — ​ ​ 141,867 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 10,143 ​ ​ — ​ ​ 10,143 ​ ​ — ​ Accrued interest payable ​ 35 ​ ​ 35 ​ ​ — ​ ​ 34 ​ ​ 1 ​ Interest rate contracts ​ 9 ​ ​ 9 ​ ​ — ​ ​ 9 ​ ​ — ​ ​ At September 30, 2022 and December 31, 2021, neither the commitment fees received on commitments to extend credit nor the fair value thereof was material to the Consolidated Financial Statements of the Company. ​ The table below presents the balance of assets and liabilities measured at fair value on a recurring basis: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Level 1 Level 2 Level 3 Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 21,142 ​ $ — ​ $ 21,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate contracts — assets ​ $ — ​ $ 9 ​ $ — ​ $ 9 ​ Interest rate contracts — liabilities ​ — ​ (9) ​ — ​ (9) ​ ​ There were no assets or liabilities measured at fair value on a nonrecurring basis as of September 30, 2022 or December 31, 2021.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2022
Subsequent Events
Subsequent Events	(16) Subsequent Events ​ On October 27, 2022, the Board of Directors of Territorial Bancorp Inc. declared a quarterly cash dividend of $0.23 per share of common stock. The dividend is expected to be paid on November 23, 2022 to stockholders of record as of November 10, 2022.

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	9 Months Ended
	Sep. 30, 2022
Cash and Cash Equivalents
Schedule of balances of cash and cash equivalents	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, (Dollars in thousands) 2022 2021 Cash and due from banks ​ $ 10,376 ​ $ 11,662 ​ ​ Interest-earning deposits in other banks ​ 25,910 ​ 88,197 ​ ​ Cash and cash equivalents ​ $ 36,286 ​ $ 99,859 ​ ​

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2022
Investment Securities.
Schedule of amortized cost and fair values of investment securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Gross Unrealized ​ Estimated (Dollars in thousands) Cost Gains Losses Fair Value September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 23,856 ​ $ — $ (2,714) ​ $ 21,142 ​ Total ​ $ 23,856 ​ $ — $ (2,714) ​ $ 21,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 717,434 ​ $ — $ (131,682) ​ $ 585,752 ​ Total ​ $ 717,434 ​ $ — $ (131,682) ​ $ 585,752 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 636,442 ​ $ 5,699 $ (7,154) ​ $ 634,987 ​ Total ​ $ 636,442 ​ $ 5,699 $ (7,154) ​ $ 634,987 ​ ​
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 ​ $ 23,856 ​ $ 21,142 ​ Total ​ $ 23,856 ​ $ 21,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ Due within 5 years ​ $ 15 ​ $ 14 ​ Due after 5 years through 10 years ​ 19 ​ 18 ​ Due after 10 years ​ 717,400 ​ 585,720 ​ Total ​ $ 717,434 ​ $ 585,752 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
Schedule of realized gains and losses and proceeds from sales of securities held to maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ ​ September 30, ​ September 30, ​ (Dollars in thousands) 2022 2021 2022 2021 Proceeds from sales ​ $ — ​ $ 7,539 ​ $ — ​ $ 26,900 ​ Gross gains ​ — ​ 403 ​ — ​ 1,840 ​ Gross losses ​ — ​ — ​ — ​ — ​
Summary of investment securities in an unrealized loss position	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months 12 Months or Longer Total Unrealized Unrealized Number of Unrealized Description of securities Fair Value Losses Fair Value Losses Securities Fair Value Losses (Dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 21,142 ​ $ (2,714) ​ $ — ​ $ — 4 ​ $ 21,142 ​ $ (2,714) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 259,897 ​ $ (38,335) ​ $ 325,850 ​ $ (93,347) 146 ​ $ 585,747 ​ $ (131,682) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored mortgage-backed securities ​ $ 482,629 ​ $ (6,976) ​ $ 3,681 ​ $ (178) 43 ​ $ 486,310 ​ $ (7,154) ​ ​

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2022
Loans Receivable and Allowance for Loan Losses
Schedule of components of loans receivable	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ (Dollars in thousands) 2022 2021 Real estate loans: ​ ​ ​ ​ ​ ​ ​ First mortgages: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential ​ $ 1,256,304 ​ $ 1,267,537 ​ Multi-family residential ​ 3,946 ​ 5,468 ​ Construction, commercial and other ​ 23,035 ​ 18,590 ​ Home equity loans and lines of credit ​ 7,229 ​ 7,121 ​ Total real estate loans ​ 1,290,514 ​ 1,298,716 ​ Other loans: ​ ​ ​ ​ ​ ​ ​ Loans on deposit accounts ​ 217 ​ 278 ​ Consumer and other loans ​ 8,496 ​ 8,192 ​ Total other loans ​ 8,713 ​ 8,470 ​ Less: ​ ​ ​ ​ ​ ​ ​ Net unearned fees and discounts ​ (2,168) ​ (1,693) ​ Allowance for loan losses ​ (2,015) ​ (2,669) ​ Total unearned fees, discounts and allowance for loan losses ​ (4,183) ​ (4,362) ​ Loans receivable, net ​ $ 1,295,044 ​ $ 1,302,824 ​
Schedule of activity in allowance for loan losses on loans receivable and by portfolio segment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals Three months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,350 ​ $ 445 ​ $ 1 ​ $ 82 ​ $ 253 ​ $ 2,131 ​ (Reversal of provision) provision for loan losses ​ (87) ​ (3) ​ — ​ 1 ​ (20) ​ (109) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 83 ​ 233 ​ 2,022 ​ Charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Recoveries ​ — ​ — ​ — ​ — ​ — ​ — ​ Net charge-offs ​ — ​ — ​ — ​ (7) ​ — ​ (7) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 1,814 ​ $ 435 ​ $ 1 ​ $ 89 ​ $ 330 ​ $ 2,669 ​ (Reversal of provision) provision for loan losses ​ (551) ​ 7 ​ — ​ 38 ​ (97) ​ (603) ​ ​ ​ 1,263 ​ 442 ​ 1 ​ 127 ​ 233 ​ 2,066 ​ Charge-offs ​ — ​ — ​ — ​ (52) ​ — ​ (52) ​ Recoveries ​ — ​ — ​ — ​ 1 ​ — ​ 1 ​ Net charge-offs ​ — ​ — ​ — ​ (51) ​ — ​ (51) ​ Balance, end of period ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals Three months ended September 30, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 2,021 ​ $ 434 ​ $ 1 ​ $ 133 ​ $ 380 ​ $ 2,969 ​ (Reversal of provision) provision for loan losses ​ (132) ​ 11 ​ — ​ (19) ​ (27) ​ (167) ​ ​ ​ 1,889 ​ 445 ​ 1 ​ 114 ​ 353 ​ 2,802 ​ Charge-offs ​ — ​ — ​ — ​ (3) ​ — ​ (3) ​ Recoveries ​ — ​ — ​ — ​ — ​ — ​ — ​ Net charge-offs ​ — ​ — ​ — ​ (3) ​ — ​ (3) ​ Balance, end of period ​ $ 1,889 ​ $ 445 ​ $ 1 ​ $ 111 ​ $ 353 ​ $ 2,799 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, beginning of period ​ $ 3,102 ​ $ 406 ​ $ 1 ​ $ 146 ​ $ 607 ​ $ 4,262 ​ (Reversal of provision) provision for loan losses ​ (1,213) ​ 39 ​ — ​ (24) ​ (254) ​ (1,452) ​ ​ ​ 1,889 ​ 445 ​ 1 ​ 122 ​ 353 ​ 2,810 ​ Charge-offs ​ — ​ — ​ — ​ (13) ​ — ​ (13) ​ Recoveries ​ — ​ — ​ — ​ 2 ​ — ​ 2 ​ Net charge-offs ​ — ​ — ​ — ​ (11) ​ — ​ (11) ​ Balance, end of period ​ $ 1,889 ​ $ 445 ​ $ 1 ​ $ 111 ​ $ 353 ​ $ 2,799 ​ ​
Schedule of balance in allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction, Home Commercial Equity and Other Loans and Residential Mortgage Lines of Consumer (Dollars in thousands) Mortgage Loans Credit and Other Unallocated Totals September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending allowance balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ Collectively evaluated for impairment ​ 1,263 ​ 442 ​ 1 ​ 76 ​ 233 ​ 2,015 ​ Total ending allowance balance ​ $ 1,263 ​ $ 442 ​ $ 1 ​ $ 76 ​ $ 233 ​ $ 2,015 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending loan balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 2,402 ​ $ — ​ $ 16 ​ $ — ​ $ — ​ $ 2,418 ​ Collectively evaluated for impairment ​ 1,255,802 ​ 22,907 ​ 7,215 ​ 8,717 ​ — ​ 1,294,641 ​ Total ending loan balance ​ $ 1,258,204 ​ $ 22,907 ​ $ 7,231 ​ $ 8,717 ​ $ — ​ $ 1,297,059 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending allowance balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ Collectively evaluated for impairment ​ 1,814 ​ 435 ​ 1 ​ 89 ​ 330 ​ 2,669 ​ Total ending allowance balance ​ $ 1,814 ​ $ 435 ​ $ 1 ​ $ 89 ​ $ 330 ​ $ 2,669 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending loan balance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 3,812 ​ $ — ​ $ 19 ​ $ — ​ $ — ​ $ 3,831 ​ Collectively evaluated for impairment ​ 1,267,560 ​ 18,529 ​ 7,103 ​ 8,470 ​ — ​ 1,301,662 ​ Total ending loan balance ​ $ 1,271,372 ​ $ 18,529 ​ $ 7,122 ​ $ 8,470 ​ $ — ​ $ 1,305,493 ​ ​
Schedule of balance of impaired loans individually evaluated for impairment by class of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid Recorded Principal (Dollars in thousands) Investment Balance September 30, 2022: ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,402 ​ $ 2,897 ​ Home equity loans and lines of credit ​ 16 ​ 30 ​ Total ​ $ 2,418 ​ $ 2,927 ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 3,812 ​ $ 4,299 ​ Home equity loans and lines of credit ​ ​ 19 ​ ​ 31 ​ Total ​ $ 3,831 ​ $ 4,330 ​
Schedule of average recorded investment and interest income recognized on impaired loans by class of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Three Months Ended For the Nine Months Ended September 30, September 30, Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized 2022: ​ ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 2,431 ​ $ 6 ​ $ 2,465 ​ $ 18 ​ Home equity loans and lines of credit ​ 17 ​ — ​ 18 ​ ​ ​ Total ​ $ 2,448 ​ $ 6 ​ $ 2,483 ​ $ 18 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ With no related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 4,816 ​ $ 8 ​ $ 4,866 ​ $ 28 ​ Home equity loans and lines of credit ​ ​ 20 ​ — ​ 21 ​ — ​ Total ​ $ 4,836 ​ $ 8 ​ $ 4,887 ​ $ 28 ​
Schedule of aging of loans and accrual status by class of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans 90 Days or More 30 - 59 60 - 89 90 Days or Past Due Days Past Days Past More Total Past Loans Not Total Nonaccrual and Still (Dollars in thousands) Due Due Past Due Due Past Due Loans Loans Accruing September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 737 ​ $ — ​ $ 227 ​ $ 964 ​ $ 1,253,298 ​ $ 1,254,262 ​ $ 1,985 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 3,942 ​ 3,942 ​ — ​ — ​ Construction, commercial and other mortgages ​ — ​ — ​ — ​ — ​ 22,907 ​ 22,907 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,231 ​ 7,231 ​ 16 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 217 ​ 217 ​ — ​ — ​ Consumer and other ​ 2 ​ 4 ​ — ​ 6 ​ 8,494 ​ 8,500 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 739 ​ $ 4 ​ $ 227 ​ $ 970 ​ $ 1,296,089 ​ $ 1,297,059 ​ $ 2,001 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ $ 129 ​ $ — ​ $ 244 ​ $ 373 ​ $ 1,265,540 ​ $ 1,265,913 ​ $ 3,261 ​ $ — ​ Multi-family residential mortgages ​ — ​ — ​ — ​ — ​ 5,459 ​ 5,459 ​ — ​ — ​ Construction, commercial and other mortgages ​ — ​ — ​ — ​ — ​ 18,529 ​ 18,529 ​ — ​ — ​ Home equity loans and lines of credit ​ — ​ — ​ — ​ — ​ 7,122 ​ 7,122 ​ 19 ​ — ​ Loans on deposit accounts ​ — ​ — ​ — ​ — ​ 278 ​ 278 ​ — ​ — ​ Consumer and other ​ 3 ​ — ​ 24 ​ 27 ​ 8,165 ​ 8,192 ​ — ​ 24 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 132 ​ $ — ​ $ 268 ​ $ 400 ​ $ 1,305,093 ​ $ 1,305,493 ​ $ 3,280 ​ $ 24 ​
Summary of troubled debt restructurings by class of loan	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Number of Accrual Number of Nonaccrual ​ (Dollars in thousands) Loans Status Loans Status Total September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ 2 ​ $ 417 ​ ​ 2 ​ $ 424 ​ $ 841 Total ​ 2 ​ $ 417 ​ ​ 2 ​ $ 424 ​ $ 841 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to four-family residential mortgages ​ 3 ​ $ 551 ​ ​ 1 ​ $ 340 ​ $ 891 Total ​ 3 ​ $ 551 ​ ​ 1 ​ $ 340 ​ $ 891
Summarizes loans in the loan payment deferral program by class of loan	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022 ​ ​ ​ December 31, 2021 ​ (Dollars in thousands) ​ Loans in the Loan Payment Deferral Program ​ Percent of Total Loans ​ Loans in the Loan Payment Deferral Program ​ Percent of Total Loans One- to- four family residential mortgage ​ $ 62,027 ​ 4.8 % ​ $ 74,704 ​ 5.7 % Non-residential mortgage ​ ​ 3,431 ​ 0.3 ​ ​ ​ 3,928 ​ 0.3 ​ Total ​ $ 65,458 ​ 5.1 % ​ $ 78,632 ​ 6.0 %

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2022
Securities Sold Under Agreements to Repurchase
Summary of securities sold under agreements to repurchase	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022 December 31, 2021 Weighted Weighted Repurchase Average Repurchase Average (Dollars in thousands) Liability Rate Liability Rate Maturing: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Over 2 years to 3 years ​ $ 10,000 1.81 % $ 5,000 1.88 % Over 3 years to 4 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 ​ $ 13,813 ​ $ 11,411 ​ $ 10,000 ​ $ 3,813 27 ​

Offsetting of Financial Liabi_2

Offsetting of Financial Liabilities (Tables)	9 Months Ended
	Sep. 30, 2022
Offsetting of Financial Liabilities
Schedule of securities sold under agreements to repurchase subject to conditional right of offset	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Amount of Gross Amount Not Offset in the Gross Amount Gross Amount Liabilities Balance Sheet of Recognized Offset in the Presented in the Financial Cash Collateral (Dollars in thousands) Liabilities Balance Sheet Balance Sheet Instruments ​ Pledged Net Amount September 30, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities sold under agreements to repurchase ​ $ 10,000 ​ $ — ​ $ 10,000 ​ $ 10,000 ​ $ — ​ $ —

Employee Stock Ownership Plan (

Employee Stock Ownership Plan (Tables)	9 Months Ended
	Sep. 30, 2022
Employee Stock Ownership Plan.
Schedule of shares held by the ESOP trust	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, 2022 2021 Allocated shares ​ 571,241 ​ 540,869 ​ ​ Unearned shares ​ 305,831 ​ 342,531 ​ ​ Total ESOP shares ​ 877,072 ​ 883,400 ​ ​ Fair value of unearned shares, in thousands ​ $ 5,670 ​ $ 8,649 ​ ​

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2022
Schedule of compensation expense and related tax benefit for all share-based awards	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, (In thousands) 2022 2021 2022 2021 Compensation expense ​ $ (18) ​ $ 36 ​ $ 256 ​ $ 241 ​ Income tax benefit ​ (5) ​ 10 ​ 70 ​ 66 ​
Schedule of stock option activity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Aggregate ​ ​ ​ ​ Average ​ Remaining ​ Intrinsic ​ ​ ​ ​ Exercise ​ Contractual ​ Value ​ ​ Options ​ Price ​ Life (years) ​ (in thousands) Options outstanding at December 31, 2021 3,085 ​ $ 23.62 0.67 ​ $ 5 ​ Granted — ​ — — ​ — ​ Exercised — ​ — — ​ — ​ Forfeited — ​ — — ​ — ​ Expired 3,085 ​ — — ​ — ​ Options outstanding at September 30, 2022 ​ — ​ $ — — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options outstanding at December 31, 2020 3,085 ​ $ 23.62 1.67 ​ $ 1 ​ Granted — ​ — — ​ — ​ Exercised — ​ — — ​ — ​ Forfeited — ​ — — ​ — ​ Expired — ​ — — ​ — ​ Options outstanding at September 30, 2021 3,085 ​ $ 23.62 0.92 ​ $ 5 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options vested and exercisable at September 30, 2022 — ​ $ — — ​ $ — ​
Restricted Stock
Schedule of restricted stock award activity	​ ​ ​ ​ ​ ​ ​ ​ Weighted Time-Based Average Grant Restricted Date Fair Stock Value Unvested at December 31, 2021 23,208 ​ $ 24.61 ​ Granted 12,013 ​ 23.77 ​ Vested 11,557 ​ 24.68 ​ Forfeited — ​ — ​ Unvested at September 30, 2022 23,664 ​ $ 24.15 ​ ​ ​ ​ ​ ​ ​ ​ Unvested at December 31, 2020 23,695 ​ $ 24.24 ​ Granted 10,849 ​ 26.67 ​ Vested 11,336 ​ 25.81 ​ Forfeited — ​ — ​ Unvested at September 30, 2021 23,208 ​ $ 24.61 ​
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, 2021 41,583 ​ $ 24.68 Granted 14,412 ​ 23.77 Vested 7,670 ​ 27.30 Forfeited 4,768 ​ 27.30 Unvested at September 30, 2022 43,557 ​ $ 23.63 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2020 40,585 ​ $ 25.83 Granted 13,016 ​ 26.67 Vested 7,473 ​ 30.73 Forfeited 4,545 ​ 30.73 Unvested at September 30, 2021 41,583 ​ $ 24.68
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, 2021 10,396 ​ $ 24.03 Granted 3,603 ​ ​ 24.42 Vested — ​ — Forfeited 3,110 ​ 24.45 Unvested at September 30, 2022 10,889 ​ $ 24.04 ​ ​ ​ ​ ​ ​ Unvested at December 31, 2020 10,147 ​ $ 24.69 Granted 3,254 ​ ​ 25.94 Vested 1,628 ​ 28.32 Forfeited 1,377 ​ 28.32 Unvested at September 30, 2021 10,396 ​ $ 24.03

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2022
Earnings Per Share
Schedule of information used to compute basic and diluted earnings per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended September 30, September 30, ​ (Dollars in thousands, except per share data) 2022 2021 2022 2021 Net income ​ $ 3,891 ​ $ 4,162 ​ $ 12,711 ​ $ 13,233 ​ ​ Income allocated to participating securities ​ ​ (23) ​ ​ (23) ​ ​ (70) ​ ​ (47) ​ ​ Net income available to common shareholders ​ $ 3,868 ​ $ 4,139 ​ $ 12,641 ​ $ 13,186 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-average number of shares used in: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per share ​ 8,802,010 ​ 9,012,398 ​ 8,885,626 ​ 9,086,447 ​ ​ Dilutive common stock equivalents: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options and restricted stock units ​ 44,601 ​ 44,171 ​ 53,182 ​ 44,622 ​ ​ Diluted earnings per share ​ 8,846,611 ​ 9,056,569 ​ 8,938,808 ​ 9,131,069 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income per common share, basic ​ $ 0.44 ​ $ 0.46 ​ $ 1.42 ​ $ 1.45 ​ ​ Net income per common share, diluted ​ $ 0.44 ​ $ 0.46 ​ $ 1.41 ​ $ 1.44 ​ ​

Other Comprehensive Loss (Table

Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2022
Other Comprehensive Loss
Schedule of changes in components of accumulated other comprehensive loss, net of taxes	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unfunded Unrealized Pension (Gain)/Loss on (Dollars in thousands) Liability Securities Total Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ 877 ​ $ 6,401 ​ Other comprehensive loss, net of taxes ​ ​ — ​ 1,114 ​ 1,114 ​ Net current period other comprehensive loss ​ — ​ 1,114 ​ 1,114 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 8,967 ​ $ — ​ $ 8,967 ​ Net current period other comprehensive loss ​ — ​ — ​ — ​ Balances at end of period ​ $ 8,967 ​ $ — ​ $ 8,967 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 5,524 ​ $ — ​ $ 5,524 ​ Other comprehensive loss, net of taxes ​ — ​ 1,991 ​ 1,991 ​ Net current period other comprehensive loss ​ — ​ 1,991 ​ 1,991 ​ Balances at end of period ​ $ 5,524 ​ $ 1,991 ​ $ 7,515 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balances at beginning of period ​ $ 8,967 ​ $ (276) ​ $ 8,691 ​ Other comprehensive loss, net of taxes ​ ​ — ​ ​ 3 ​ ​ 3 ​ Amounts reclassified from other comprehensive income, net of taxes ​ — ​ 273 ​ 273 ​ Net current period other comprehensive loss ​ — ​ 276 ​ 276 ​ Balances at end of period ​ $ 8,967 ​ $ — ​ $ 8,967 ​
Schedule of tax effect on each component of accumulated other comprehensive loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2022 2021 Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ $ — ​ $ — ​ $ — ​ Total ​ $ 1,519 ​ $ (405) ​ $ 1,114 ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended September 30, ​ 2022 2021 ​ Pretax After Tax Pretax After Tax (Dollars in thousands) Amount Tax Amount Amount Tax Amount Unrealized loss on securities ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ $ 4 ​ $ (1) ​ $ 3 ​ Amount reclassified from other comprehensive income ​ ​ — ​ ​ — ​ ​ — ​ ​ 373 ​ ​ (100) ​ ​ 273 ​ Total ​ $ 2,714 ​ $ (723) ​ $ 1,991 ​ $ 377 ​ $ (101) ​ $ 276 ​ ​

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2022
Revenue Recognition
Reconciliation of revenue from contracts with customers and other revenue reported in line items	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Service and ​ ​ ​ ​ (Dollars in thousands) Other Fees Other Total Three months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 304 ​ $ 38 ​ $ 342 Other revenue ​ ​ 35 ​ ​ 38 ​ ​ 73 Total ​ $ 339 ​ $ 76 ​ $ 415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 399 ​ $ 30 ​ $ 429 Other revenue ​ ​ 34 ​ ​ 27 ​ ​ 61 Total ​ $ 433 ​ $ 57 ​ $ 490 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 989 ​ $ 138 ​ $ 1,127 Other revenue ​ ​ 103 ​ ​ 1,221 ​ ​ 1,324 Total ​ $ 1,092 ​ $ 1,359 ​ $ 2,451 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue from contracts with customers ​ $ 1,855 ​ $ 154 ​ $ 2,009 Other revenue ​ ​ 103 ​ ​ 83 ​ ​ 186 Total ​ $ 1,958 ​ $ 237 ​ $ 2,195

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2022
Leases
Schedule of lease costs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended Nine Months Ended ​ September 30, September 30, (Dollars in thousands) 2022 2021 2022 2021 Lease costs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease costs ​ $ 712 ​ $ 843 ​ $ 2,211 ​ $ 2,552 ​ Short-term lease costs ​ 107 ​ 15 ​ 199 ​ 32 ​ Variable lease costs ​ 49 ​ 31 ​ 127 ​ 113 ​ Total lease costs ​ $ 868 ​ $ 889 ​ $ 2,537 ​ $ 2,697 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash paid for amounts included in measurement of lease liabilities ​ $ 854 ​ $ 836 ​ $ 2,381 ​ $ 2,520 ​ ROU assets obtained in exchange for new operating lease liabilities ​ $ 2,003 ​ $ 444 ​ $ 6,833 ​ $ 3,285 ​ ​
Schedule of future minimum rental commitments under noncancellable operating leases and lease payment obligations	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ $ 713 ​ ​ ​ ​ ​ ​ 2023 ​ 2,787 ​ ​ ​ ​ ​ ​ 2024 ​ 2,651 ​ ​ ​ ​ ​ ​ 2025 ​ 2,031 ​ ​ ​ ​ ​ ​ 2026 ​ 1,868 ​ ​ ​ ​ ​ ​ Thereafter ​ 12,789 ​ ​ ​ ​ ​ ​ Total ​ ​ 22,839 ​ ​ ​ ​ ​ ​ Less lease incentives to be received in 2022 ​ ​ (4,996) ​ ​ ​ ​ ​ ​ Less present value discount ​ ​ (2,447) ​ ​ ​ ​ ​ ​ Present value of leases ​ $ 15,396 ​ ​ ​ ​ ​ ​ ​
Schedule of other lease related information	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ ​ September 30, ​ ​ ​ 2022 ​ 2021 ​ Weighted-average remaining lease term (years) ​ 9.03 ​ ​ 5.95 ​ ​ Weighted-average discount rate ​ ​ 2.04 % ​ ​ 2.18 % ​

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2022
Fair Value
Schedule of estimated fair values of financial instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ ​ ​ ​ Fair Value Measurements Using (Dollars in thousands) Amount Fair Value Level 1 Level 2 Level 3 September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 36,286 ​ $ 36,286 ​ $ 36,286 ​ $ — ​ $ — ​ Investment securities available for sale ​ ​ 21,142 ​ ​ 21,142 ​ ​ — ​ ​ 21,142 ​ ​ — ​ Investment securities held to maturity ​ 717,434 ​ ​ 585,752 ​ ​ — ​ ​ 585,752 ​ ​ — ​ Loans receivable, net ​ 1,295,044 ​ ​ 1,145,828 ​ ​ — ​ ​ — ​ ​ 1,145,828 ​ FHLB stock ​ 8,197 ​ ​ 8,197 ​ ​ — ​ ​ 8,197 ​ ​ — ​ FRB stock ​ ​ 3,171 ​ ​ 3,171 ​ ​ — ​ ​ 3,171 ​ ​ — ​ Accrued interest receivable ​ 6,061 ​ ​ 6,061 ​ ​ 32 ​ ​ 1,521 ​ ​ 4,508 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,711,853 ​ ​ 1,705,405 ​ ​ — ​ ​ 1,376,636 ​ ​ 328,769 ​ Advances from the Federal Home Loan Bank ​ 141,000 ​ ​ 132,781 ​ ​ — ​ ​ 132,781 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 9,423 ​ ​ — ​ ​ 9,423 ​ ​ — ​ Accrued interest payable ​ 351 ​ ​ 351 ​ ​ — ​ ​ 65 ​ ​ 286 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 99,859 ​ $ 99,859 ​ $ 99,859 ​ $ — ​ $ — ​ Investment securities held to maturity ​ 636,442 ​ ​ 634,987 ​ ​ — ​ ​ 634,987 ​ ​ — ​ Loans receivable, net ​ 1,302,824 ​ ​ 1,314,609 ​ ​ — ​ ​ — ​ ​ 1,314,609 ​ FHLB stock ​ 8,173 ​ ​ 8,173 ​ ​ — ​ ​ 8,173 ​ ​ — ​ FRB stock ​ ​ 3,158 ​ ​ 3,158 ​ ​ — ​ ​ 3,158 ​ ​ — ​ Accrued interest receivable ​ 5,786 ​ ​ 5,786 ​ ​ 16 ​ ​ 1,126 ​ ​ 4,644 ​ Interest rate contracts ​ 9 ​ ​ 9 ​ ​ — ​ ​ 9 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 1,681,828 ​ ​ 1,682,078 ​ ​ — ​ ​ 1,456,773 ​ ​ 225,305 ​ Advances from the Federal Home Loan Bank ​ 141,000 ​ ​ 141,867 ​ ​ — ​ ​ 141,867 ​ ​ — ​ Securities sold under agreements to repurchase ​ 10,000 ​ ​ 10,143 ​ ​ — ​ ​ 10,143 ​ ​ — ​ Accrued interest payable ​ 35 ​ ​ 35 ​ ​ — ​ ​ 34 ​ ​ 1 ​ Interest rate contracts ​ 9 ​ ​ 9 ​ ​ — ​ ​ 9 ​ ​ — ​
Schedule of assets and liabilities measured at fair value on a recurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Level 1 Level 2 Level 3 Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment securities available for sale ​ $ — ​ $ 21,142 ​ $ — ​ $ 21,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate contracts — assets ​ $ — ​ $ 9 ​ $ — ​ $ 9 ​ Interest rate contracts — liabilities ​ — ​ (9) ​ — ​ (9) ​

Organization - Narrative (Detai

Organization - Narrative (Details)	9 Months Ended
	Sep. 30, 2022 subsidiary
Organization
Number of inactive subsidiaries	1

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Cash and Cash Equivalents
Cash and due from banks	$ 10,376	$ 11,662
Interest-earning deposits in other banks	25,910	88,197
Cash and cash equivalents	$ 36,286	$ 99,859

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Values of Available-for-Sale Securities (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Available-for-sale:
Amortized Cost	$ 23,856
Gross Unrealized Losses	(2,714)
Estimated Fair Value	21,142
U.S. government-sponsored mortgage-backed securities
Available-for-sale:
Amortized Cost	23,856
Gross Unrealized Losses	(2,714)
Estimated Fair Value	$ 21,142

Investment Securities - Amort_2

Investment Securities - Amortized Cost and Fair Values of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Held-to-maturity:
Amortized Cost	$ 717,434	$ 636,442
Gross Unrealized Gains		5,699
Gross Unrealized Losses	(131,682)	(7,154)
Estimated Fair Value	585,752	634,987
U.S. government-sponsored mortgage-backed securities
Held-to-maturity:
Amortized Cost	717,434	636,442
Gross Unrealized Gains		5,699
Gross Unrealized Losses	(131,682)	(7,154)
Estimated Fair Value	$ 585,752	$ 634,987

Investment Securities - Maturit

Investment Securities - Maturity Schedule of Available-for-Sale Securities (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Amortized Cost
Due after 10 years	$ 23,856
Amortized Cost	23,856
Estimated Fair Value
Due after 10 years	21,142
Estimated Fair Value	$ 21,142

Investment Securities - Matur_2

Investment Securities - Maturity Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Held-to-maturity, Amortized Cost
Due within 5 years	$ 15
Due after 5 years through 10 years	19
Due after 10 years	717,400
Amortized Cost	717,434	$ 636,442
Held-to-maturity, Estimated Fair Value
Due within 5 years	14
Due after 5 years through 10 years	18
Due after 10 years	585,720
Estimated Fair Value	$ 585,752	$ 634,987

Investment Securities - Realize

Investment Securities - Realized Gains and Losses and Proceeds from Sales (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Realized gains and losses and the proceeds from sales of securities
Proceeds from sales		$ 23,570,000
U.S. government-sponsored mortgage-backed securities
Realized gains and losses and the proceeds from sales of securities
Gross gains		1,500,000
Proceeds from sales		22,100,000
Available-for-sale mortgage-backed securities sold		3,000,000
Debt Securities, Available-for-sale, Realized Gain		$ 339,000
Minimum | U.S. government-sponsored mortgage-backed securities
Realized gains and losses and the proceeds from sales of securities
Portion of outstanding purchased principal already collected		85%
Held-to-maturity debt securities
Realized gains and losses and the proceeds from sales of securities
Gross gains	$ 403,000	$ 1,840,000
Proceeds from sales	$ 7,539,000	$ 26,900,000

Investment Securities - Securit

Investment Securities - Securities Pledged (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Realized gains and losses and the proceeds from sales of securities
Amortized cost	$ 717,434	$ 636,442
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]
Realized gains and losses and the proceeds from sales of securities
Amortized cost	$ 241,000	$ 140,600

Investment Securities - Availab

Investment Securities - Available-for-Sale Unrealized Loss Position Summary (Details) - U.S. government-sponsored mortgage-backed securities $ in Thousands	Sep. 30, 2022 USD ($) security
Schedule of Investments [Line Items]
Less Than 12 Months Fair Value	$ 21,142
Less Than 12 Months Unrealized Losses	$ (2,714)
Number of Securities | security	4
Total Fair Value	$ 21,142
Total Unrealized Losses	$ (2,714)

Investment Securities - Held-to

Investment Securities - Held-to-Maturity Unrealized Loss Position Summary (Details) - U.S. government-sponsored mortgage-backed securities $ in Thousands	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Investment Securities
Less Than 12 Months Fair Value	$ 259,897	$ 482,629
Less Than 12 Months Unrealized Losses	(38,335)	(6,976)
12 Months or Longer Fair Value	325,850	3,681
12 Months or Longer Unrealized Losses	$ (93,347)	$ (178)
Total Number of Securities	146	43
Total Fair Value	$ 585,747	$ 486,310
Total Unrealized Losses	$ (131,682)	$ (7,154)

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Loan Losses - Components (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Loans receivable
Less: Net unearned fees and discounts	$ (2,168)		$ (1,693)
Less: Allowance for loan losses	(2,015)	$ (2,131)	(2,669)	$ (2,799)	$ (2,969)	$ (4,262)
Total unearned fees, discounts and allowance for loan losses	(4,183)		(4,362)
Loans receivable, net	1,295,044		1,302,824
Construction, Commercial and Other Mortgage Loans
Loans receivable
Less: Allowance for loan losses	(442)	(445)	(435)	(445)	(434)	(406)
Home Equity Loans and Lines of Credit.
Loans receivable
Less: Allowance for loan losses	(1)	(1)	(1)	(1)	(1)	(1)
Consumer and other
Loans receivable
Less: Allowance for loan losses	(76)	(82)	(89)	(111)	(133)	(146)
Unallocated
Loans receivable
Less: Allowance for loan losses	(233)	$ (253)	(330)	$ (353)	$ (380)	$ (607)
Real estate loans
Loans receivable
Loans receivable, net	1,290,514		1,298,716
Real estate loans | One- to four-family residential
Loans receivable
Loans receivable, net	1,256,304		1,267,537
Real estate loans | Multi-family residential
Loans receivable
Loans receivable, net	3,946		5,468
Real estate loans | Construction, Commercial and Other Mortgage Loans
Loans receivable
Loans receivable, net	23,035		18,590
Real estate loans | Home Equity Loans and Lines of Credit.
Loans receivable
Loans receivable, net	7,229		7,121
Other loans
Loans receivable
Loans receivable, net	8,713		8,470
Other loans | Loans on Deposit Accounts
Loans receivable
Loans receivable, net	217		278
Other loans | Consumer and other
Loans receivable
Loans receivable, net	$ 8,496		$ 8,192

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Loan Losses - Activity in Allowance for Loan Losses by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Activity in allowance for loan losses
Balance, beginning of period	$ 2,131	$ 2,969	$ 2,669	$ 4,262
(Reversal of provision) provision for loan losses	(109)	(167)	(603)	(1,452)
Allowance for loan losses on loans receivable after provision (reversal of allowance)	2,022	2,802	2,066	2,810
Charge-offs	(7)	(3)	(52)	(13)
Recoveries			1	2
Net recoveries (charge-offs)	(7)	(3)	(51)	(11)
Balance, end of period	2,015	2,799	2,015	2,799
Residential Mortgage
Activity in allowance for loan losses
Balance, beginning of period	1,350	2,021	1,814	3,102
(Reversal of provision) provision for loan losses	(87)	(132)	(551)	(1,213)
Allowance for loan losses on loans receivable after provision (reversal of allowance)	1,263	1,889	1,263	1,889
Balance, end of period	1,263	1,889	1,263	1,889
Construction, Commercial and Other Mortgage Loans
Activity in allowance for loan losses
Balance, beginning of period	445	434	435	406
(Reversal of provision) provision for loan losses	(3)	11	7	39
Allowance for loan losses on loans receivable after provision (reversal of allowance)	442	445	442	445
Balance, end of period	442	445	442	445
Home Equity Loans and Lines of Credit.
Activity in allowance for loan losses
Balance, beginning of period	1	1	1	1
Allowance for loan losses on loans receivable after provision (reversal of allowance)	1	1	1	1
Balance, end of period	1	1	1	1
Consumer and other
Activity in allowance for loan losses
Balance, beginning of period	82	133	89	146
(Reversal of provision) provision for loan losses	1	(19)	38	(24)
Allowance for loan losses on loans receivable after provision (reversal of allowance)	83	114	127	122
Charge-offs	(7)	(3)	(52)	(13)
Recoveries			1	2
Net recoveries (charge-offs)	(7)	(3)	(51)	(11)
Balance, end of period	76	111	76	111
Unallocated
Activity in allowance for loan losses
Balance, beginning of period	253	380	330	607
(Reversal of provision) provision for loan losses	(20)	(27)	(97)	(254)
Allowance for loan losses on loans receivable after provision (reversal of allowance)	233	353	233	353
Balance, end of period	$ 233	$ 353	$ 233	$ 353

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses and Loans, Net of Unearned Fees and Discounts, by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Allowance for loan losses:
Collectively evaluated for impairment	$ 2,015		$ 2,669
Total ending allowance balance	2,015	$ 2,131	2,669	$ 2,799	$ 2,969	$ 4,262
Loans:
Individually evaluated for impairment	2,418		3,831
Collectively evaluated for impairment	1,294,641		1,301,662
Total ending loan balance	1,297,059		1,305,493
Residential Mortgage
Allowance for loan losses:
Collectively evaluated for impairment	1,263		1,814
Total ending allowance balance	1,263	1,350	1,814	1,889	2,021	3,102
Loans:
Individually evaluated for impairment	2,402		3,812
Collectively evaluated for impairment	1,255,802		1,267,560
Total ending loan balance	1,258,204		1,271,372
Construction, Commercial and Other Mortgage Loans
Allowance for loan losses:
Collectively evaluated for impairment	442		435
Total ending allowance balance	442	445	435	445	434	406
Loans:
Collectively evaluated for impairment	22,907		18,529
Total ending loan balance	22,907		18,529
Home Equity Loans and Lines of Credit.
Allowance for loan losses:
Collectively evaluated for impairment	1		1
Total ending allowance balance	1	1	1	1	1	1
Loans:
Individually evaluated for impairment	16		19
Collectively evaluated for impairment	7,215		7,103
Total ending loan balance	7,231		7,122
Consumer and other
Allowance for loan losses:
Collectively evaluated for impairment	76		89
Total ending allowance balance	76	82	89	111	133	146
Loans:
Collectively evaluated for impairment	8,717		8,470
Total ending loan balance	8,717		8,470
Unallocated
Allowance for loan losses:
Collectively evaluated for impairment	233		330
Total ending allowance balance	$ 233	$ 253	$ 330	$ 353	$ 380	$ 607

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Loan Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Impaired loans
Recorded Investment	$ 2,418		$ 2,418		$ 3,831
Unpaid Principal Balance	2,927		2,927		4,330
Average Recorded Investment	2,448	$ 4,836	2,483	$ 4,887
Interest Income Recognized	6	8	18	28
One- to four-family residential
Impaired loans
Recorded Investment	2,402		2,402		3,812
Unpaid Principal Balance	2,897		2,897		4,299
Average Recorded Investment	2,431	4,816	2,465	4,866
Interest Income Recognized	6	8	18	28
Home Equity Loans and Lines of Credit
Impaired loans
Recorded Investment	16		16		19
Unpaid Principal Balance	30		30		$ 31
Average Recorded Investment	$ 17	$ 20	$ 18	$ 21

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Loan Losses - Delinquent and Nonaccrual Loans (Details)	9 Months Ended
	Sep. 30, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Accounts, Notes, Loans and Financing Receivable
Loans individually evaluated for impairment with a related allowance for loan loss | $	$ 0	$ 0
Number of nonaccrual loans | loan		10
Number of nonaccrual loans | loan	11
Nonaccrual Loans | $	$ 2,001,000	$ 3,280,000
Loan delinquency period that may result in loss	90 days
Loan delinquency period after which an appraisal is obtained of the underlying collateral	4 months
Loans 90 Days or More Past Due and Still Accruing | $	$ 0	$ 24,000
Consumer and other
Accounts, Notes, Loans and Financing Receivable
Number of nonaccrual loans | loan		2

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Loan Losses - Aging of Loans and Accrual Status by Class (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due
Total Loans	$ 1,297,059,000	$ 1,305,493,000
Nonaccrual Loans	2,001,000	3,280,000
Loans 90 Days or More Past Due and Still Accruing	0	24,000
One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,254,262,000	1,265,913,000
Nonaccrual Loans	1,985,000	3,261,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Multi-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	3,942,000	5,459,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Construction, Commercial and Other Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Total Loans	22,907,000	18,529,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment, Past Due
Total Loans	7,231,000	7,122,000
Nonaccrual Loans	16,000	19,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Loans on Deposit Accounts
Financing Receivable, Recorded Investment, Past Due
Total Loans	217,000	278,000
Loans 90 Days or More Past Due and Still Accruing	0	0
Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	8,500,000	8,192,000
Loans 90 Days or More Past Due and Still Accruing	0	24,000
Not Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,296,089,000	1,305,093,000
Not Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	1,253,298,000	1,265,540,000
Not Past Due | Multi-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	3,942,000	5,459,000
Not Past Due | Construction, Commercial and Other Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Total Loans	22,907,000	18,529,000
Not Past Due | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment, Past Due
Total Loans	7,231,000	7,122,000
Not Past Due | Loans on Deposit Accounts
Financing Receivable, Recorded Investment, Past Due
Total Loans	217,000	278,000
Not Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	8,494,000	8,165,000
Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	970,000	400,000
Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	964,000	373,000
Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	6,000	27,000
30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	739,000	132,000
30 - 59 Days Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	737,000	129,000
30 - 59 Days Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	2,000	3,000
60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	4,000
60 - 89 Days Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans	4,000
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans	227,000	268,000
90 Days or More Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Loans	$ 227,000	244,000
90 Days or More Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due
Total Loans		$ 24,000

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Loan Losses - Troubled Debt Restructurings (Details)	9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) loan	Sep. 30, 2021 loan	Dec. 31, 2021 USD ($) loan
Troubled debt restructurings
Troubled debt restructurings	$ 841,000		$ 891,000
Number of loans subsequently defaulted | loan	0	0
Additional disclosures
Real estate owned	$ 0		0
Mortgage loans in process of foreclosure, total value			$ 0
Percentage of current loan balance to the current tax-assessed value of the property securing mortgage loans COVID-19	49.70%
Accrual Status
Troubled debt restructurings
Number of Loans | loan	2		3
Troubled debt restructurings	$ 417,000		$ 551,000
Non Accrual Loans
Troubled debt restructurings
Number of Loans | loan	2		1
Troubled debt restructurings	$ 424,000		$ 340,000
Loans modified in troubled debt restructuring
Troubled debt restructurings
Number of Loans | loan	0	0
Additional disclosures
Commitments to lend additional funds to borrowers	$ 0
Loans modified in troubled debt restructuring | Delinquent
Troubled debt restructurings
Number of Loans | loan			1
Troubled debt restructurings			$ 126,000
One- to four-family residential
Troubled debt restructurings
Troubled debt restructurings	841,000		$ 891,000
Additional disclosures
Mortgage loans in process of foreclosure, total value	$ 227,000
Percentage of mortgage loans representing total loan portfolio balance	97%
Percentage of current loan balance to current tax	42.40%
Amount of loan deferred resumed payment of principal and interest, COVID-19	$ 61,600,000
Amount of loan deferred making payment of interest, COVID-19	$ 243,000
One- to four-family residential | Accrual Status
Troubled debt restructurings
Number of Loans | loan	2		3
Troubled debt restructurings	$ 417,000		$ 551,000
One- to four-family residential | Non Accrual Loans
Troubled debt restructurings
Number of Loans | loan	2		1
Troubled debt restructurings	$ 424,000		$ 340,000

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Loan Losses - Loan Payment Deferral Program by Class (Details)	9 Months Ended
	Sep. 30, 2022 USD ($) loan	Dec. 31, 2021 USD ($)
Additional disclosures
Loans in the Loan Payment Deferral Program	$ 65,458,000	$ 78,632,000
Percent of Total Loans	5.10%	6%
90 Days or More Past Due
Additional disclosures
Delinquent amount	$ 145,000
One- to four-family residential
Additional disclosures
Loans in the Loan Payment Deferral Program	$ 62,027,000	$ 74,704,000
Percent of Total Loans	4.80%	5.70%
Deferred loan reclassified to active, percent	99.40%
Deferred loan reclassified to active, interest only, Percent	0.40%
Number of financial receivable delinquent | loan	1
One- to four-family residential | 90 Days or More Past Due
Additional disclosures
Delinquent period	150 days
Non-residential Mortgage
Additional disclosures
Loans in the Loan Payment Deferral Program	$ 3,431,000	$ 3,928,000
Percent of Total Loans	0.30%	0.30%

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Loan Losses - Collateral, Sales, Serviced for Others, Directors and Executive Officers (Details)	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) loan
Accounts, Notes, Loans and Financing Receivable
Number of nonaccrual loans | loan						10
Loans serviced for others	$ 36,900,000		$ 36,900,000		$ 36,900,000	$ 41,300,000
Loans serviced for others, securitization for which the company continues to hold the related mortgage-backed securities	21,400,000		21,400,000		$ 21,400,000	$ 24,300,000
Loans serviced for others, amount of contractually specified servicing fees earned	$ 24,000	$ 31,000	$ 77,000	$ 99,000
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration]					Loan And Deposit Services, Fees And Commissions
Maximum
Accounts, Notes, Loans and Financing Receivable
Loan to value ratio (as a percent)	80%		80%		80%
Residential Mortgage Loans Held For Sale
Accounts, Notes, Loans and Financing Receivable
Residential mortgage loans sold, loan amount			$ 5,400,000	26,200,000
Residential mortgage loans sold, recognized gains			$ 3,000	$ 584,000
Number of nonaccrual loans | loan						0

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Summary of Repurchase Liability by Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Securities sold under agreements to repurchase
Repurchase Liability	$ 10,000	$ 10,000
Rate (as a percent)	1.81%	1.81%
Over 2 years to 3 years
Securities sold under agreements to repurchase
Repurchase Liability	$ 10,000	$ 5,000
Rate (as a percent)	1.81%	1.88%
Over 3 years to 4 years
Securities sold under agreements to repurchase
Repurchase Liability		$ 5,000
Rate (as a percent)		1.73%

Securities Sold Under Agreeme_4

Securities Sold Under Agreements to Repurchase - Summary of Securities Pledged (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
Securities sold under agreements to repurchase
Repurchase liability maximum	90%
Maturing Over 90 days
Securities sold under agreements to repurchase
Carrying Value of Securities	$ 13,813
Fair Value of Securities	11,411
Repurchase Liability	10,000
Amount at Risk	$ 3,813
Weighted Average Months to Maturity	27 months

Offsetting of Financial Liabi_3

Offsetting of Financial Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Securities sold under agreements to repurchase
Gross Amount of Recognized Liabilities	$ 10,000	$ 10,000
Net Amount of Liabilities Presented in the Balance Sheet	10,000	10,000
Gross amount not offset in the balance sheet
Financial Instruments	$ 10,000	$ 10,000

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Loan, Expense and Shares (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jan. 01, 2009	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Employee Stock Ownership Plan
Allocated shares		571,241		571,241		540,869
Unearned shares		305,831		305,831		342,531
Total ESOP shares		877,072		877,072		883,400
Fair value of unearned shares, in thousands		$ 5,670,000		$ 5,670,000		$ 8,649,000
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		$ 258,000	$ 310,000	$ 834,000	$ 942,000
ESOP | Prime rate
Employee Stock Ownership Plan
Variable interest rate				prime rate, as published in The Wall Street Journal

Employee Stock Ownership Plan_2

Employee Stock Ownership Plan - Nonqualified ESOP Restoration Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
ESOP restoration | Certain executives
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits
Accrued (reversed) benefits	$ 23,000	$ 41,000	$ 73,000	$ 94,000

Share-Based Compensation - Plan

Share-Based Compensation - Plan Provisions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-Based Compensation
Shares remaining available for new awards under the 2019 Equity Plan	146,347		146,347
Compensation expense	$ (18)	$ 36	$ 256	$ 241
Income tax benefit	$ (5)	$ 10	$ 70	$ 66
2010 Equity Incentive Plan | Vesting period one
Share-Based Compensation
Vesting period			3 years
2010 Equity Incentive Plan | Vesting period two
Share-Based Compensation
Vesting period			5 years
2010 Equity Incentive Plan | Vesting period three
Share-Based Compensation
Vesting period			6 years

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity (Details) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Stock option activity
Balance at beginning of period (in shares)	3,085	3,085	3,085
Expired (in shares)	3,085
Balance at end of period (in shares)		3,085	3,085	3,085
Weighted Average Exercise Price
Balance at beginning of period (in dollars per share)	$ 23.62	$ 23.62	$ 23.62
Balance at end of period (in dollars per share)		$ 23.62	$ 23.62	$ 23.62
Remaining Contractual Life
Options outstanding		11 months 1 day	8 months 1 day	1 year 8 months 1 day
Aggregate Intrinsic Value
Beginning of period	$ 5	$ 1	$ 1
End of period		$ 5	$ 5	$ 1
Vested during period (in shares)	0	0
Unrecognized compensation costs	$ 0

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock Awards (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Unrecognized compensation
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	146,347
Restricted Stock
Restricted Stock Awards
Unvested at beginning of period (in shares)	23,208	23,695
Granted (in shares)	12,013	10,849
Vested (in shares)	11,557	11,336
Unvested at end of period (in shares)	23,664	23,208
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 24.61	$ 24.24
Granted (in dollars per share)	23.77	26.67
Vested (in dollars per share)	24.68	25.81
Unvested at end of period (in dollars per share)	$ 24.15	$ 24.61
Unrecognized compensation
Unrecognized compensation costs	$ 425,000
Restricted Stock Units Based on a Performance Condition
Restricted Stock Awards
Unvested at beginning of period (in shares)	41,583	40,585
Granted (in shares)	14,412	13,016
Vested (in shares)	7,670	7,473
Forfeited (in shares)	4,768	4,545
Unvested at end of period (in shares)	43,557	41,583
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 24.68	$ 25.83
Granted (in dollars per share)	23.77	26.67
Vested (in dollars per share)	27.30	30.73
Forfeited (in dollars per share)	27.30	30.73
Unvested at end of period (in dollars per share)	$ 23.63	$ 24.68
Unrecognized compensation
Unrecognized compensation costs	$ 131,000
Unrecognized compensation costs, period of recognition	3 years
Restricted Stock Units Based on a Market Condition
Restricted Stock Awards
Unvested at beginning of period (in shares)	10,396	10,147
Granted (in shares)	3,603	3,254
Vested (in shares)		1,628
Forfeited (in shares)	3,110	1,377
Unvested at end of period (in shares)	10,889	10,396
Weighted Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 24.03	$ 24.69
Granted (in dollars per share)	24.42	25.94
Vested (in dollars per share)		28.32
Forfeited (in dollars per share)	24.45	28.32
Unvested at end of period (in dollars per share)	$ 24.04	$ 24.03
Unrecognized compensation
Unrecognized compensation costs		$ 85,000
Unrecognized compensation costs, period of recognition	3 years
Performance Based Restricted Stock Units (PRSUs)
Unrecognized compensation
Unrecognized compensation costs, period of recognition	3 years

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share
Net income	$ 3,891	$ 4,162	$ 12,711	$ 13,233
Income allotted to participating securities	(23)	(23)	(70)	(47)
Net income available to common shareholders	$ 3,868	$ 4,139	$ 12,641	$ 13,186
Weighted-average number of shares used in:
Basic earnings per share (in shares)	8,802,010	9,012,398	8,885,626	9,086,447
Dilutive common stock equivalents:
Stock options and restricted stock units (in shares)	44,601	44,171	53,182	44,622
Diluted earnings per share (in shares)	8,846,611	9,056,569	8,938,808	9,131,069
Net income per common share, basic (in dollars per share)	$ 0.44	$ 0.46	$ 1.42	$ 1.45
Net income per common share, diluted (in dollars per share)	$ 0.44	$ 0.46	$ 1.41	$ 1.44

Other Comprehensive Loss - Chan

Other Comprehensive Loss - Changes in Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	$ (255,905)	$ (256,322)	$ (248,708)
Other comprehensive (income) loss, net of taxes	1,114	1,991	276
Net current period other comprehensive (income) loss	1,114	1,991	276
Balances at end of period	(256,745)	(256,745)	(251,689)
Accumulated Other Comprehensive (Loss)/Income
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	6,401	5,524	8,691
Other comprehensive (income) loss, net of taxes	1,114
Net current period other comprehensive (income) loss	1,114	1,991	276
Balances at end of period	7,515	7,515	8,967
Unfunded Pension Liability
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	5,524	5,524	8,967
Balances at end of period	5,524	5,524	8,967
Unrealized (Gain) / Loss on Securities
Changes in the components of accumulated other comprehensive loss, net of taxes
Balances at beginning of period	877		(276)
Other comprehensive (income) loss, net of taxes	1,114	1,991	3
Net current period other comprehensive (income) loss	1,114	1,991	276
Balances at end of period	$ 1,991	1,991
Other comprehensive (income) loss, net of taxes
Changes in the components of accumulated other comprehensive loss, net of taxes
Other comprehensive (income) loss, net of taxes		$ 1,991	3
Amount Reclassified from Other Comprehensive Income
Changes in the components of accumulated other comprehensive loss, net of taxes
Other comprehensive (income) loss, net of taxes			273
Amounts reclassified from other comprehensive income, net of taxes			$ (273)

Other Comprehensive Loss - Tax

Other Comprehensive Loss - Tax Effect on Each Component (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Tax effect on each component of other comprehensive loss
Pretax amount	$ 1,519	$ 2,714	$ 377
Tax	(405)	(723)	(101)
After Tax Amount	1,114	1,991	276
Unrealized (Gain) / Loss on Securities
Tax effect on each component of other comprehensive loss
Pretax amount	1,519	2,714	4
Tax	(405)	(723)	(1)
After Tax Amount	$ 1,114	$ 1,991	3
Amount Reclassified from Other Comprehensive Income
Tax effect on each component of other comprehensive loss
Pretax amount			373
Tax			(100)
After Tax Amount			$ 273

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Revenue from contracts with customers	$ 342	$ 429	$ 1,127	$ 2,009
Other revenue	73	61	1,324	186
Total	415	490	2,451	2,195
Service and Other Fees
Revenues
Revenue from contracts with customers	304	399	989	1,855
Other revenue	35	34	103	103
Total	339	433	1,092	1,958
Other
Revenues
Revenue from contracts with customers	38	30	138	154
Other revenue	38	27	1,221	83
Total	$ 76	$ 57	$ 1,359	$ 237

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lease costs:
Operating lease costs	$ 712	$ 843	$ 2,211	$ 2,552
Short-term lease costs	107	15	199	32
Variable lease costs	49	31	127	113
Total lease costs	868	889	2,537	2,697
Cash paid for amounts included in measurement of lease liabilities	854	836	2,381	2,520
ROU assets obtained in exchange for new operating lease liabilities	$ 2,003	$ 444	$ 6,833	$ 3,285

Leases - Future Minimum Rental

Leases - Future Minimum Rental Commitments Under Non-cancellable Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Future minimum rental commitments:
2022	$ 713
2023	2,787
2024	2,651
2025	2,031
2026	1,868
Thereafter	12,789
Total	22,839
Less lease incentives to be received in 2022	(4,996)
Less present value discount	(2,447)
Present value of leases	$ 15,396	$ 10,744

Leases - Other Related Informat

Leases - Other Related Information (Details)	Sep. 30, 2022	Sep. 30, 2021
Leases
Weighted-average remaining lease term (years)	9 years 10 days	5 years 11 months 12 days
Weighted-average discount rate	2.04%	2.18%

Fair Value - Estimated Fair Val

Fair Value - Estimated Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets
Investment securities available for sale, at fair value	$ 21,142
Investment securities held to maturity	585,752	$ 634,987
Carrying Amount
Assets
Cash and cash equivalents	36,286	99,859
Investment securities available for sale, at fair value	21,142
Investment securities held to maturity	717,434	636,442
Loans receivable, net	1,295,044	1,302,824
FHLB stock	8,197	8,173
FRB stock	3,171	3,158
Accrued interest receivable	6,061	5,786
Interest rate contracts		9
Liabilities
Deposits	1,711,853	1,681,828
Advances from the Federal Home Loan Bank	141,000	141,000
Securities sold under agreements to repurchase	10,000	10,000
Accrued interest payable	351	35
Interest rate contracts		9
Estimated Fair Value
Assets
Cash and cash equivalents	36,286	99,859
Investment securities available for sale, at fair value	21,142
Investment securities held to maturity	585,752	634,987
Loans receivable, net	1,145,828	1,314,609
FHLB stock	8,197	8,173
FRB stock	3,171	3,158
Accrued interest receivable	6,061	5,786
Interest rate contracts		9
Liabilities
Deposits	1,705,405	1,682,078
Advances from the Federal Home Loan Bank	132,781	141,867
Securities sold under agreements to repurchase	9,423	10,143
Accrued interest payable	351	35
Interest rate contracts		9
Estimated Fair Value | Level 1
Assets
Cash and cash equivalents	36,286	99,859
Accrued interest receivable	32	16
Estimated Fair Value | Level 2
Assets
Investment securities available for sale, at fair value	21,142
Investment securities held to maturity	585,752	634,987
FHLB stock	8,197	8,173
FRB stock	3,171	3,158
Accrued interest receivable	1,521	1,126
Interest rate contracts		9
Liabilities
Deposits	1,376,636	1,456,773
Advances from the Federal Home Loan Bank	132,781	141,867
Securities sold under agreements to repurchase	9,423	10,143
Accrued interest payable	65	34
Interest rate contracts		9
Estimated Fair Value | Level 3
Assets
Loans receivable, net	1,145,828	1,314,609
Accrued interest receivable	4,508	4,644
Liabilities
Deposits	328,769	225,305
Accrued interest payable	$ 286	$ 1

Fair Value - Recurring Basis (D

Fair Value - Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets and Liabilities Measured at Fair Value on Recurring Basis
Investment securities available for sale, at fair value	$ 21,142
Fair Value, Measurements, Recurring
Assets and Liabilities Measured at Fair Value on Recurring Basis
Interest rate contracts - assets		$ 9
Interest rate contracts - liabilities		(9)
Investment securities available for sale, at fair value	21,142
Fair Value, Measurements, Recurring | Level 2
Assets and Liabilities Measured at Fair Value on Recurring Basis
Interest rate contracts - assets		9
Interest rate contracts - liabilities		$ (9)
Investment securities available for sale, at fair value	$ 21,142

Fair Value - Nonrecurring Basis

Fair Value - Nonrecurring Basis (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Fair Value, Measurements, Nonrecurring
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares		3 Months Ended		9 Months Ended
	Oct. 27, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Subsequent Events
Quarterly cash dividend declared on common stock (in dollars per share)		$ 0.23	$ 0.23	$ 0.69	$ 0.69
Subsequent event
Subsequent Events
Quarterly cash dividend declared on common stock (in dollars per share)	$ 0.23

Uncategorized Items - tbnk-2022

Label	Element	Value
Unfunded Pension Liability
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	$ (8,967,000)