PCSB Financial (PCSB) 10-Q 6 Nov 20 2020 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Sep. 30, 2020	Nov. 04, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	PCSB
Entity Registrant Name	PCSB Financial Corporation
Entity Central Index Key	0001691337
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		16,417,737
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.01 par value per share
Security Exchange Name	NASDAQ
Entity File Number	001-38065
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	81-4710738
Entity Address, Address Line One	2651 Strang Blvd
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Yorktown Heights
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10598
City Area Code	914
Local Phone Number	248-7272
Document Quarterly Report	true
Document Transition Report	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
ASSETS
Cash and due from banks	$ 161,387	$ 135,045
Federal funds sold	1,352	1,257
Total cash and cash equivalents	162,739	136,302
Investment securities:
Held to maturity debt securities, at amortized cost (fair value of $293,810, and $281,497, respectively)	287,370	275,772
Available for sale debt securities, at fair value	31,139	37,426
Total investment securities	318,509	313,198
Loans receivable, net of allowance for loan losses of $8,672 and $8,639, respectively	1,227,913	1,260,947
Accrued interest receivable	6,729	6,880
FHLB stock	6,307	6,308
Premises and equipment, net	20,195	20,853
Deferred tax asset, net	3,400	3,129
Bank-owned life insurance	25,151	25,019
Goodwill	6,106	6,106
Other intangible assets	209	229
Other assets	13,817	12,958
Total assets	1,791,075	1,791,929
LIABILITIES AND SHAREHOLDERS' EQUITY
Interest bearing deposits	1,193,168	1,181,357
Non-interest bearing deposits	183,844	191,898
Total deposits	1,377,012	1,373,255
Mortgage escrow funds	6,420	10,123
Advances from FHLB	106,056	106,089
Other liabilities	27,908	28,749
Total liabilities	1,517,396	1,518,216
Commitments and contingencies
Shareholders' equity:
Preferred stock ($0.01 par value, 10,000,000 shares authorized, no shares issued or outstanding as of September 30, 2020 and June 30, 2020)
Common stock ($0.01 par value, 200,000,000 shares authorized, 18,712,295 shares issued as of September 30, 2020 and June 30, 2020, respectively, and 16,634,237 and 16,898,137 shares outstanding as of September 30, 2020 and June 30, 2020, respectively)	187	187
Additional paid in capital	187,026	186,200
Retained earnings	143,386	141,288
Unearned compensation - ESOP	(10,901)	(11,145)
Accumulated other comprehensive loss, net of income taxes	(6,216)	(6,403)
Treasury stock, at cost (2,078,058 and 1,814,158 shares as of September 30, 2020 and June 30, 2020, respectively)	(39,803)	(36,414)
Total shareholders' equity	273,679	273,713
Total liabilities and shareholders' equity	$ 1,791,075	$ 1,791,929

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Statement Of Financial Position [Abstract]
Held to maturity investment securities, fair value	$ 293,810	$ 281,497
Allowance for loan losses	$ 8,672	$ 8,639
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	10,000,000	10,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares, issued	18,712,295	18,712,295
Common Stock, shares outstanding	16,634,237	16,898,137
Treasury Stock, Shares	2,078,058	1,814,158

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Interest and dividend income
Loans receivable		$ 12,547	$ 13,036
Investment securities		1,856	2,692
Federal funds and other		125	298
Total interest and dividend income		14,528	16,026
Interest expense
Deposits and escrow interest		2,432	3,301
FHLB advances		519	727
Total interest expense		2,951	4,028
Net interest income		11,577	11,998
Provision for loan losses		109	335
Net interest income after provision for loan losses		11,468	11,663
Noninterest income
Fees and service charges		322	402
Bank-owned life insurance	[1]	132	137
Swap income	[1]	129	170
Other		11	56
Total noninterest income		594	765
Noninterest expense
Salaries and employee benefits		5,607	5,764
Occupancy and equipment		1,318	1,315
Communication and data processing		576	531
Professional fees		400	404
Postage, printing, stationary and supplies		139	140
FDIC assessment		113
Advertising		100	100
Amortization of intangible assets		20	24
Other operating expenses		351	509
Total noninterest expense		8,624	8,787
Net income before income tax expense		3,438	3,641
Income tax expense		710	812
Net income		$ 2,728	$ 2,829
Earnings per common share:
Basic		$ 0.18	$ 0.18
Diluted		$ 0.18	$ 0.18
Weighted average common shares outstanding:
Basic		15,302,838	15,979,762
Diluted		15,302,949	16,082,276
[1]	Not within the scope of ASC 606.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 2,728	$ 2,829
Unrealized (losses) gains on available for sale debt securities:
Net change in unrealized gains/losses before reclassification adjustment	(16)	181
Net change in unrealized gains/losses	(16)	181
Tax effect	3	(38)
Net of tax	(13)	143
Defined benefit pension plan and supplemental retirement plans:
Total other comprehensive income	187	256
Comprehensive income	2,915	3,085
Pension Benefits [Member]
Defined benefit pension plan and supplemental retirement plans:
Reclassification adjustment for amortization of prior service cost and net gain included in net periodic pension cost	240	133
Tax effect	(51)	(29)
Net of tax	189	104
SERP Benefits [Member]
Defined benefit pension plan and supplemental retirement plans:
Reclassification adjustment for amortization of prior service cost and net gain included in net periodic pension cost	14	11
Tax effect	(3)	(2)
Net of tax	$ 11	$ 9

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Unallocated Common Stock of ESOP [Member]	Treasury Stock, at Cost [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Jun. 30, 2019	$ 281,307	$ 187	$ 182,129	$ 134,500	$ (12,114)	$ (18,305)	$ (5,090)
Begining Balance (in shares) at Jun. 30, 2019		17,804,039
Net income	2,829			2,829
Other comprehensive income	256						256
Common stock dividends declared	(659)			(659)
Repurchase of common stock	(3,524)					(3,524)
Repurchase of common stock (in shares)		(179,800)
Stock-based compensation	830		830
ESOP shares committed to be released	483		239		244
Ending Balance at Sep. 30, 2019	281,522	$ 187	183,198	136,670	(11,870)	(21,829)	(4,834)
Ending Balance (in shares) at Sep. 30, 2019		17,624,239
Beginning Balance at Jun. 30, 2020	273,713	$ 187	186,200	141,288	(11,145)	(36,414)	(6,403)
Begining Balance (in shares) at Jun. 30, 2020		16,898,137
Net income	2,728			2,728
Other comprehensive income	187						187
Common stock dividends declared	(630)			(630)
Repurchase of common stock	(3,449)					(3,449)
Repurchase of common stock (in shares)		(266,900)
Restricted stock awards granted			(60)			60
Restricted stock awards granted (in shares)		3,000
Stock-based compensation	829		829
ESOP shares committed to be released	301		57		244
Ending Balance at Sep. 30, 2020	$ 273,679	$ 187	$ 187,026	$ 143,386	$ (10,901)	$ (39,803)	$ (6,216)
Ending Balance (in shares) at Sep. 30, 2020		16,634,237

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement Of Stockholders Equity [Abstract]
Common stock dividends declared (per share)	$ 0.04	$ 0.04
ESOP shares committed to be released (in shares)	24,419	24,419

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES
Net income	$ 2,728,000	$ 2,829,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	109,000	335,000
Depreciation and amortization	748,000	695,000
Amortization of net premiums on securities and net deferred loan origination costs	206,000	494,000
Net decrease (increase) in accrued interest receivable	151,000	(697,000)
Net gains on sales of foreclosed real estate		(47,000)
Stock-based compensation	829,000	830,000
ESOP compensation	301,000	483,000
Earnings from cash surrender value of BOLI	(132,000)	(137,000)
Net accretion of purchase accounting adjustments	(75,000)	(198,000)
Other adjustments, principally net changes in other assets and liabilities	(2,986,000)	680,000
Net cash provided by operating activities	1,879,000	5,267,000
Purchases of investment securities:
Held to maturity	(27,894,000)
Maturities, calls and amortization of investment securities:
Held to maturity	17,289,000	33,185,000
Available for sale	6,202,000	7,492,000
Loan principal repayments (disbursements), net	33,088,000	(26,762,000)
Purchase of loans		(44,065,000)
Net redemption of FHLB stock	1,000	1,000
Purchase of bank premises and equipment, net of sales	(70,000)	(127,000)
Proceeds from sales of foreclosed real estate		709,000
Net cash provided by (used in) investing activities	28,616,000	(29,567,000)
FINANCING ACTIVITIES
Net increase in deposits	3,757,000	8,084,000
Repayment of long-term FHLB advances	(33,000)	(31,000)
Net decrease in mortgage escrow funds	(3,703,000)	(1,802,000)
Common stock dividends paid	(630,000)	(659,000)
Repurchase of common stock	(3,449,000)	(3,524,000)
Net cash (used in) provided by financing activities	(4,058,000)	2,068,000
Net increase (decrease) in cash and cash equivalents	26,437,000	(22,232,000)
Cash and cash equivalents at beginning of period	136,302,000	60,029,000
Cash and cash equivalents at end of period	162,739,000	37,797,000
Cash paid for:
Interest	2,908,000	3,883,000
Income taxes (net of refunds)	$ 2,625,000	821,000
Loans transferred to foreclosed real estate and other assets		360,000
Establishment of right to use lease asset (ASU 2016-13)		$ 12,687,000

Basis of Presentation

Basis of Presentation	3 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Note 1. Basis of Presentation Nature of Operations PCSB Bank is a community-oriented financial institution that provides financial services to individuals and businesses within its market area of Putnam, Southern Dutchess, Rockland and Westchester Counties in New York. The Bank is a state-chartered commercial bank and its deposits are insured up to applicable limits by the Deposit Insurance Fund of the Federal Deposit Insurance Corporation (“FDIC”). The Bank’s primary regulators are the FDIC and the NYSDFS. Basis of Presentation The unaudited consolidated financial statements contained herein reflect all normal recurring adjustments that are, in the opinion of management, necessary for a fair presentation of the results for the interim periods presented. Such adjustments are the only adjustments reflected in the consolidated financial statements contained herein. The results of operations for the current period presented are not necessarily indicative of the results of operations that may be expected for the entire current fiscal year. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended June 30, 2020, included in the Company's Annual Report on Form 10-K. Certain prior period amounts have been reclassified to conform to the current presentation. Reclassifications had no effect on prior period net income or equity. Risks and Uncertainties: The COVID-19 pandemic has created extensive disruptions to the global and U.S. economies and to the lives of individuals throughout the world. The New York City Metropolitan area and environs have had the highest incidence of COVID-19 in the nation, and the neighboring Tri-State area of New Jersey and Connecticut also has been particularly affected by COVID-19. Governments, businesses, and the public are taking unprecedented actions to contain the spread of COVID-19 and to mitigate its effects, including quarantines, travel bans, shelter-in-place orders, closures of businesses and schools, fiscal and monetary stimulus, and legislation designed to deliver financial aid and other relief. While the scope, duration, and full effects of COVID-19 are rapidly evolving and not fully known, the pandemic and the efforts to contain it have disrupted global economic activity, adversely affected the functioning of financial markets, impacted market interest rates, increased economic and market uncertainty, and disrupted trade and supply chains. The ultimate financial impact is unknown at this time. However, if these actions are sustained, it may adversely impact several industries within our geographic footprint and impair the ability of the Company’s customers to fulfill their contractual obligations to the Company. This could cause the Company to experience a material adverse effect on our business operations, asset valuations, financial condition, and results of operations. Material adverse impacts may include all or a combination of valuation impairments of the Company’s intangible assets, investments, loans, or deferred tax assets. As it relates to the allowance for loan losses, the Company continues to assess the economic impacts the COVID-19 pandemic has had on our local economy and loan portfolio. The Company has taken actions to identify, assess and address its COVID-19 related credit exposure. Many factors are unknown, including the length of the resulting economic shutdown imposed by New York State and other neighboring states, the impacts of the government ’s fiscal and monetary relief measures, including payment deferral programs, as well as the long-term impacts COVID-19 may have on our consumer and commercial borrowers. It is reasonably possible that the Company’s allowance for loan loss estimate as of September 3 0 , 2020 will change in the near term and could result in a material change to the Company’s provision for loan losses, earnings and capital. Use of Estimates

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Sep. 30, 2020
Accounting Changes And Error Corrections [Abstract]
Recent Accounting Pronouncements	Note 2 . Recent Accounting Pronouncements The pronouncements discussed below are not intended to be an all-inclusive list, but rather only those pronouncements that could potentially have a material impact on our financial position, results of operations or disclosures. There were no accounting standards adopted in the current period Future Application of Accounting Pronouncements Previously Issued In June 2016, the FASB issued ASU 2016-13 “Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 affects entities holding financial assets that are not accounted for at fair value through net income, including loans, debt securities, and other financial assets. The ASU requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected by recording an allowance for current expected credit losses. In October 2019, the FASB unanimously voted to delay the implementation of the standard for three years for certain companies, including small reporting companies (as defined by the SEC), non-SEC public companies and private companies. The Company currently qualifies as a small reporting company and is subject to the delayed implementation. Therefore, t he amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2023, including interim periods within that fiscal year. The Company is actively working through the provisions of the Update. Management has established a steering committee which is identifying the methodologies and the additional data requirements necessary to implement the Update and has engaged a third-party software service provider to assist in the Company's implementation. Management is currently evaluating the impact that ASU 2016-13 will have on the Company’s consolidated financial position, results of operations and disclosures.

Investment Securities

Investment Securities	3 Months Ended
	Sep. 30, 2020
Investments Debt And Equity Securities [Abstract]
Investment Securities	Note 3. Investment Securities The amortized cost, gross unrealized/unrecognized gains and losses and fair value of available for sale and held to maturity debt securities at September 30, 2020 and June 30, 2020 were as follows: September 30, 2020 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 7,000 $ 17 $ - $ 7,017 Corporate and other debt securities 5,031 90 - 5,121 Mortgage-backed securities – residential 18,582 432 (13 ) 19,001 Total available for sale $ 30,613 $ 539 $ (13 ) $ 31,139 Held to maturity: U.S. Government and agency obligations $ 38,001 $ 391 $ (1 ) $ 38,391 Corporate and other debt securities 73,994 798 (1,266 ) 73,526 Mortgage-backed securities – residential 112,035 4,316 (10 ) 116,341 Mortgage-backed securities – collateralized mortgage obligations 44,621 1,488 (9 ) 46,100 Mortgage-backed securities – commercial 18,719 733 - 19,452 Total held to maturity $ 287,370 $ 7,726 $ (1,286 ) $ 293,810 June 30, 2020 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 11,002 $ 47 $ - $ 11,049 Corporate and other debt securities 5,038 82 - 5,120 Mortgage-backed securities – residential 20,844 428 (15 ) 21,257 Total available for sale $ 36,884 $ 557 $ (15 ) $ 37,426 Held to maturity: U.S. Government and agency obligations $ 42,001 $ 454 $ (5 ) $ 42,450 Corporate and other debt securities 52,790 332 (1,510 ) 51,612 Mortgage-backed securities – residential 117,160 4,291 (17 ) 121,434 Mortgage-backed securities – collateralized mortgage obligations 45,047 1,487 (31 ) 46,503 Mortgage-backed securities – commercial 18,774 724 - 19,498 Total held to maturity $ 275,772 $ 7,288 $ (1,563 ) $ 281,497 No securities were sold during the three months ended September 30, 2020 or 2019. The following table presents the fair value and carrying amount of debt securities at September 30, 2020, by contractual maturity (in thousands). Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. Held to maturity Available for sale Carrying Fair Amortized Fair Amount Value Cost Value 1 year or less $ 11,037 $ 11,089 $ 7,000 $ 7,018 1 to 5 years 32,165 32,266 5,031 5,120 5 to 10 years 38,716 38,487 - - over 10 years 26,121 25,894 Mortgage-backed securities and other 179,331 186,074 18,582 19,001 Total $ 287,370 $ 293,810 $ 30,613 $ 31,139 Securities pledged had carrying amounts of $164.1 million and $182.2 million at September 30, 2020 and June 30, 2020, respectively, and were pledged principally to secure FHLB advances and public deposits. The following table provides information regarding investment securities with unrealized/unrecognized losses, aggregated by investment category and length of time that individual securities had been in a continuous unrealized loss position at September 30, 2020 and June 30, 2020 September 30, 2020 Less than 12 months 12 months or greater Total Unrealized/ Unrealized/ Unrealized/ Fair Unrecognized Fair Unrecognized Fair Unrecognized Value Loss Value Loss Value Loss (in thousands) Available for sale: Mortgage-backed securities – residential $ 662 $ (9 ) $ 760 $ (4 ) $ 1,422 $ (13 ) Total available for sale $ 662 $ (9 ) $ 760 $ (4 ) $ 1,422 $ (13 ) Held to maturity: U.S. Government and agency obligations $ 2,500 $ (1 ) $ - $ - $ 2,500 $ (1 ) Corporate and other debt securities 30,144 (738 ) 16,972 (528 ) 47,116 (1,266 ) Mortgage-backed securities – residential 2,062 (10 ) - - 2,062 (10 ) Mortgage-backed securities – collateralized mortgage obligations 5,302 (9 ) - - 5,302 (9 ) Total held to maturity $ 40,008 $ (758 ) $ 16,972 $ (528 ) $ 56,980 $ (1,286 ) June 30, 2020 Less than 12 months 12 months or greater Total Unrealized/ Unrealized/ Unrealized/ Fair Unrecognized Fair Unrecognized Fair Unrecognized Value Loss Value Loss Value Loss (in thousands) Available for sale Mortgage-backed securities – residential $ 1,450 $ (15 ) $ - $ - $ 1,450 $ (15 ) Total available for sale $ 1,450 $ (15 ) $ - $ - $ 1,450 $ (15 ) Held to maturity U.S. Government and agency obligations $ 11,995 $ (5 ) $ - $ - $ 11,995 $ (5 ) Corporate and other debt securities 30,751 (1,055 ) 12,045 (455 ) 42,796 (1,510 ) Mortgage-backed securities – residential 5,130 (17 ) - - 5,130 (17 ) Mortgage-backed securities – collateralized mortgage obligations 2,627 (31 ) - - 2,627 (31 ) Total held to maturity $ 50,503 $ (1,108 ) $ 12,045 $ (455 ) $ 62,548 $ (1,563 ) As of September 30, 2020, the Company’s securities portfolio consisted of $318.5 million in securities, of which 24 securities with a fair value of $58.4 million were in an unrealized loss position. The majority of unrealized losses are related to the Company’s corporate and other debt securities, mortgage-backed securities and U.S. Government and agency obligations. Corporate and other debt securities are internally pass rated and are subject to quarterly credit monitoring. At September 30, 2020 and June 30, 2020 there were no holdings of securities of any one issuer, other than the U.S. government and its agencies, in an amount greater than 10% of shareholders’ equity. There were no securities as of September 30, 2020 or June 30, 2020 for which the Company believes it is not probable that it will collect all amounts due according to the contractual terms of the security. Management believes the unrealized losses are primarily a result of changes in interest rates and credit spreads. The Company has determined that it does not intend to sell, or it is not more likely than not that it will be required to sell, its securities that are in an unrealized loss position prior to the recovery of its amortized cost basis. Therefore, the Company did not consider any securities to be other-than-temporarily impaired as of September 30, 2020 or June 30, 2020.

Loans Receivable

Loans Receivable	3 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Loans Receivable	Note 4. Loans Receivable Loans receivable are summarized as follows (in thousands): September 30, June 30, 2020 2020 Mortgage loans: Residential $ 245,008 $ 255,382 Commercial 794,248 807,106 Construction 11,512 11,053 Net deferred loan origination costs 666 739 Total mortgage loans 1,051,434 1,074,280 Commercial and consumer loans: Commercial loans 155,569 164,257 Home equity lines of credit 29,249 29,838 Consumer and overdrafts 308 481 Net deferred loan origination costs 25 730 Total commercial and consumer loans 185,151 195,306 Total loans receivable 1,236,585 1,269,586 Allowance for loan losses (8,672 ) (8,639 ) Loans receivable, net $ 1,227,913 $ 1,260,947 The following tables present the activity in the allowance for loan losses by portfolio segment for the three months ended September 30 , 20 20 and 201 9 (in thousands): Three Months Ended September 30, 2020 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Residential $ 373 $ (33 ) $ - $ 2 $ 342 Commercial 6,913 53 - - 6,966 Construction 165 8 - - 173 Commercial loans 1,124 71 (105 ) 31 1,121 Home equity lines of credit 60 1 - 2 63 Consumer and overdrafts 4 9 (8 ) 2 7 Total $ 8,639 $ 109 $ (113 ) $ 37 $ 8,672 Three Months Ended September 30, 2019 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Residential $ 446 $ (106 ) $ - $ 3 $ 343 Commercial 3,853 461 - - 4,314 Construction 159 63 - - 222 Commercial loans 1,130 (89 ) - - 1,041 Home equity lines of credit 65 (9 ) - 5 61 Consumer and overdrafts 11 15 (18 ) 4 12 Total $ 5,664 $ 335 $ (18 ) $ 12 $ 5,993 The following tables present the balance in the allowance for loan losses and the recorded investment in loans, excluding net deferred fees and accrued interest, by portfolio segment, and based on impairment method as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 Loans Allowance for Loan Losses Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Residential $ 2,440 $ 241,837 $ 731 $ 245,008 $ 115 $ 227 $ - $ 342 Commercial - 793,362 886 794,248 - 6,966 - 6,966 Construction - 11,512 - 11,512 - 173 - 173 Commercial loans 1,804 153,765 - 155,569 - 1,121 - 1,121 Home equity lines of credit 365 28,749 135 29,249 8 55 - 63 Consumer and overdrafts - 308 - 308 - 7 - 7 Total $ 4,609 $ 1,229,533 $ 1,752 $ 1,235,894 $ 123 $ 8,549 $ - $ 8,672 June 30, 2020 Loans Allowance for Loan Losses Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Residential $ 2,448 $ 252,195 $ 739 $ 255,382 $ 118 $ 255 $ - $ 373 Commercial - 806,224 882 807,106 - 6,913 - 6,913 Construction - 11,053 - 11,053 - 165 - 165 Commercial loans 1,921 162,336 - 164,257 1 1,123 - 1,124 Home equity lines of credit 350 29,349 139 29,838 4 56 - 60 Consumer and overdrafts - 481 - 481 - 4 - 4 Total $ 4,719 $ 1,261,638 $ 1,760 $ 1,268,117 $ 123 $ 8,516 $ - $ 8,639 The following tables present information related to loans individually evaluated for impairment (excluding loans acquired with deteriorated credit quality) by portfolio segment as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 June 30, 2020 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Unpaid Principal Balance Recorded Investment Allowance for Loan Losses With no related allowance recorded: Residential $ 2,114 $ 2,007 $ - $ 2,123 $ 2,013 $ - Commercial loans 1,960 1,789 - 2,067 1,897 - Home equity lines of credit 326 338 - 326 339 - With an allowance recorded: Residential 370 433 115 372 435 118 Commercial loans 15 15 - 24 24 1 Home equity lines of credit 27 27 8 11 11 4 Total $ 4,812 $ 4,609 $ 123 $ 4,923 $ 4,719 $ 123 The tables below present the average recorded investment and interest income recognized on loans individually evaluated for impairment, by portfolio segment, for the three months ended September 30, 2020 and 2019 (in thousands): Three months ended Three months ended September 30, 2020 September 30, 2019 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 2,015 $ 8 $ 1,735 $ 6 Commercial - - 1,411 12 Commercial loans 1,809 49 1,825 50 Home equity lines of credit 339 - 680 - With an allowance recorded: Residential 434 3 738 3 Commercial loans 15 - 180 1 Home equity lines of credit 16 - 11 - Total $ 4,628 $ 60 $ 6,580 $ 72 The following table presents the recorded investment in nonaccrual loans and in loans past due over 90 days and still on accrual status, by portfolio segment, as of September 30, 2020 and June 30, 2020 (in thousands): Loans Past Due Over 90 Days Nonaccrual and Still Accruing September 30, June 30, September 30, June 30, 2020 2020 2020 2020 Residential $ 1,454 $ 1,457 $ - $ - Commercial loans 247 - - - Home equity lines of credit 383 338 - - Total $ 2,084 $ 1,795 $ - $ - Nonperforming loans include both smaller-balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. The table above excludes acquired loans that are accounted for as purchased credit impaired loans totaling $383,000 and $392,000 as of September 30, 2020 and June 30, 2020, respectively. Such loans are excluded because the loans are in pools that are considered performing. The discounts arising from recording these loans at fair value upon acquisition were due in part to credit quality and the accretable yield is being recognized as interest income over the life of the loans based on expected cash flows. The following tables present the aging of the recorded investment in past due loans by portfolio segment as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current (1) Total Residential $ - $ 286 $ 813 $ 1,099 $ 243,909 $ 245,008 Commercial - - - - 794,248 794,248 Construction - - - - 11,512 11,512 Commercial loans 83 226 247 556 155,013 155,569 Home equity lines of credit - - 383 383 28,866 29,249 Consumer and overdrafts - - - - 308 308 Total $ 83 $ 512 $ 1,443 $ 2,038 $ 1,233,856 $ 1,235,894 June 30, 2020 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current (1) Total Residential $ 495 $ 10 $ 806 $ 1,311 $ 254,071 $ 255,382 Commercial - - - - 807,106 807,106 Construction - - - - 11,053 11,053 Commercial loans 76 - - 76 164,181 164,257 Home equity lines of credit 44 - 338 382 29,456 29,838 Consumer and overdrafts - - - - 481 481 Total $ 615 $ 10 $ 1,144 $ 1,769 $ 1,266,348 $ 1,268,117 (1) Troubled Debt Restructurings The terms of certain loans have been modified as troubled debt restructurings (“TDR”). The modification of the terms of such loans included one or a combination of the following: a reduction of the stated interest rate of the loan; an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk; or a permanent reduction of the recorded investment in the loan. All TDRs are considered impaired loans. As of both September 30, 2020 and June 30, 2020, the Company had 14 loans, classified as TDRs totaling $3.2 million and $3.3 million, including $2.8 million and $2.9 million, respectively, of loans still accruing interest. The Company has allocated $124,000 and $123,000, of specific reserves to customers whose loan terms have been modified in TDRs as of September 30, 2020 and June 30, 2020, respectively. As of September 30, 2020, the Company has committed to lend an additional $10,000 to customers with outstanding loans that are classified as TDRs. The Company did not modify any loans during the three months ended September 30, 2020 or 2019 that were classified as TDRs. There were no defaults of troubled debt restructurings occurring in the three months ended September 30, 2020 that were modified in the twelve months prior to default. The Company had one TDR, a residential mortgage with a carrying amount of $370,000 as of September 30, 2019, default in the three months ended September 30, 2019 that was modified in the twelve months prior to default . This default did no t result in a charge-off nor an increase to the allowance for loan losses. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was signed into law. Section 4013 of the CARES Act, “Temporary Relief From Troubled Debt Restructurings,” provides banks the option to temporarily suspend certain requirements under U.S. GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. Additionally, on April 7, 2020, the banking agencies, including the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporation, issued a statement, “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working With Customers Affected by the Coronavirus (Revised)” (“Interagency Statement”), to encourage banks to work prudently with borrowers and to describe the agencies’ interpretation of how accounting rules under ASC 310-40, “Troubled Debt Restructurings by Creditors,” apply to certain COVID-19-related modifications. During the three months ended September 30, 2020, the Company granted or extended loan payment deferrals for 21 residential mortgage loans and home equity lines of credit totaling $7.4 million, as well as 20 commercial mortgage and commercial loans totaling $26.0 million. In accordance with either the CARES Act or Interagency Statement, these modifications are not considered troubled debt restructurings. The Company had 28 and 320 loans totaling $21.8 million and $216.2 million on loan payment deferral as of September 30, 2020 and June 30, 2020, respectively. Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis includes non-homogeneous loans, such as commercial and commercial real estate loans. This analysis is performed on a monthly basis. The Company utilizes the same grading process for acquired loans as it does for originated loans. The Company uses the following definitions for risk ratings: Special Mention – Loans classified as special mention have a potential weakness that deserves management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution's credit position at some future date. Substandard – Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Doubtful – Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans not meeting the criteria above that are analyzed individually as part of the above-described process and loans in groups of homogenous loans are considered to be pass rated loans. These loans are monitored based on delinquency and performance. Based on the most recent analysis performed, the risk category of loans by portfolio segment is as follows (in thousands): September 30, 2020 Pass Special Mention Substandard Total Residential $ 242,366 $ 563 $ 2,079 $ 245,008 Commercial 780,620 12,742 886 794,248 Construction 11,512 - - 11,512 Commercial loans 151,189 463 3,917 155,569 Home equity lines of credit 28,357 449 443 29,249 Consumer and overdrafts 308 - - 308 Total $ 1,214,352 $ 14,217 $ 7,325 $ 1,235,894 June 30, 2020 Pass Special Mention Substandard Total Residential $ 252,604 $ 687 $ 2,091 $ 255,382 Commercial 803,048 3,176 882 807,106 Construction 11,053 - - 11,053 Commercial loans 160,137 201 3,919 164,257 Home equity lines of credit 28,894 498 446 29,838 Consumer and overdrafts 481 - - 481 Total $ 1,256,217 $ 4,562 $ 7,338 $ 1,268,117 As of September 30, 2020, of the $21.8 million in loans granted COVID-19 related payment deferrals, $11.9 million were pass-rated, with $9.6 million and $221,000 rated special mention and substandard, respectively. As of June 30, 2020, of the $216.2 million in loans granted COVID-19 related payment deferrals, $211.0 million were pass-rated, with $198,000 and $4.9 million rated special mention and substandard, respectively. Purchased Credit Impaired Loans The Company has acquired loans for which there was, at acquisition, evidence of deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected. The carrying amount of those loans as of September 30, 2020 and June 30, 2020 is as follows (in thousands): September 30, June 30, 2020 2020 Residential $ 731 $ 739 Commercial 886 882 Home equity lines of credit 135 139 Carrying amount, net of allowance of $0 $ 1,752 $ 1,760 The allowance for loan losses on purchased credit impaired loans decreased Accretable yield, or income expected to be collected, for acquired loans is as follows (in thousands): Three Months Ended September 30, 2020 2019 Beginning balance $ 156 $ 192 New loans acquired - - Accretion income (5 ) (10 ) Reclassification from non-accretable difference - - Disposals - - Ending balance $ 151 $ 182

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	3 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Other Comprehensive Income (Loss)	Note 5. Other Comprehensive Income (Loss) The following is a summary of the accumulated other comprehensive income (loss) balances, net of tax (in thousands): Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2020 $ 428 $ (6,605 ) $ (226 ) $ (6,403 ) Other comprehensive (loss) income before reclassifications (16 ) - - (16 ) Amounts reclassified from accumulated other comprehensive income - 240 14 254 Less tax effect 3 (51 ) (3 ) (51 ) Net other comprehensive (loss) income (13 ) 189 11 187 Balance at September 30, 2020 $ 415 $ (6,416 ) $ (215 ) $ (6,216 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2019 $ (209 ) $ (4,631 ) $ (250 ) $ (5,090 ) Other comprehensive income before reclassifications 181 - - 181 Amounts reclassified from accumulated other comprehensive income - 133 11 144 Less tax effect (38 ) (29 ) (2 ) (69 ) Net other comprehensive income 143 104 9 256 Balance at September 30, 2019 $ (66 ) $ (4,527 ) $ (241 ) $ (4,834 )

Post-Retirement Benefits

Post-Retirement Benefits	3 Months Ended
	Sep. 30, 2020
Compensation And Retirement Disclosure [Abstract]
Post-Retirement Benefits	Note 6 . Post-Retirement Benefits Employee Pension Plan The Company maintains a non-contributory defined benefit pension plan that covers employees meeting specific requirements as to age and length of service. The Company’s contributions to this qualified plan are determined on the basis of (i) the maximum amount that can be deducted for federal income tax purposes, and (ii) the amount determined by a consulting actuary as necessary to avoid an accumulated funding deficiency as defined by the Employee Retirement Income Security Act of 1974 (“ERISA”). Contributions are intended to provide for benefits attributed to service to date but also those expected to be earned in the future. Supplemental Executive Retirement Plans The Company also maintains unfunded and non-qualified supplemental executive retirement plans ("SERP") to provide pension benefits in addition to those provided under the qualified pension plan. Net periodic benefit cost and other amounts recognized in other comprehensive income for the three months ended September 30, 2020 and 2019 (in thousands): Three Months Ended Three Months Ended September 30, 2020 September 30, 2019 Defined Benefit Plan Supplemental Retirement Plans Defined Benefit Plan Supplemental Retirement Plans Service cost $ - $ 90 $ - $ 79 Interest cost 136 24 180 31 Expected return on plan assets (456 ) - (479 ) - Amortization of prior net loss 240 14 133 11 Net periodic cost (benefit) $ (80 ) $ 128 $ (166 ) $ 121 The Company made no contributions to the defined benefit plan during the three months ended September 30, 2020. Employee Stock Ownership Plan On January 1, 2017, the Company established an Employee Stock Ownership Plan (“ESOP”) to provide eligible employees the opportunity to own Company stock. The ESOP is a tax-qualified retirement plan for the benefit of Company employees. On April 20, 2017, the Company granted a loan to the ESOP for the purchase of 1,453,209 shares of the Company’s common stock at a price of $10.00 per share. The loan obtained by the ESOP from the Company to purchase the common stock is payable annually over 15 years at a rate per annum equal to the Prime Rate, reset annually on January 1st (4.75% Shares held by the ESOP include the following (dollars in thousands): September 30, 2020 June 30, 2020 Allocated to participants 352,463 327,206 Unearned 1,090,110 1,114,529 Total ESOP shares 1,442,573 1,441,735 Fair value of unearned shares $ 13,158 $ 14,132 Total compensation expense recognized in connection with the ESOP for the three

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 7. Fair Value of Financial Instruments Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values: Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as general classification of such instruments pursuant to the valuation hierarchy, is set forth below. While management believes the Company’s valuation methodologies are appropriate and consistent with other financial institutions, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Investment Securities Impaired Loans Foreclosed Real Estate Foreclosed properties are evaluated on a quarterly basis for additional impairment and adjusted accordingly. Appraisals for both collateral-dependent impaired loans and real estate owned are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, a member of the Credit Department, as well as a third-party specialist, where deemed appropriate, reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. Once appraisals are considered appropriate, management discounts the appraised value for estimated selling costs, such as legal, broker, and property maintenance and insurance costs. The most recent analysis performed indicated discount rates ranging between 10% and 20% should be applied to properties with appraisals performed. Derivatives Assets and liabilities measured at fair value are summarized below (in thousands): Fair Value Measurements Level 1 Level 2 Level 3 Total September 30, 2020 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 7,017 $ - $ 7,017 Corporate and other debt securities - 5,121 - 5,121 Mortgage-backed securities – residential - 19,001 - 19,001 Derivatives – interest rate contracts - 8,094 - 8,094 Total assets at fair value $ - $ 39,233 $ - $ 39,233 Derivatives – interest rate contracts $ - $ 8,094 $ - $ 8,094 Total liabilities at fair value $ - $ 8,094 $ - $ 8,094 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 318 $ 318 Commercial loans - - 15 15 Home equity lines of credit - - 18 18 Total assets at fair value $ - $ - $ 351 $ 351 Fair Value Measurements Level 1 Level 2 Level 3 Total June 30, 2020 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 11,049 $ - $ 11,049 Corporate and other debt securities - 5,120 - 5,120 Mortgage-backed securities – residential - 21,257 - 21,257 Derivatives – interest rate contracts - 8,305 - 8,305 Total assets at fair value $ - $ 45,731 $ - $ 45,731 Derivatives – interest rate contracts $ - $ 8,305 $ - $ 8,305 Total liabilities at fair value $ - $ 8,305 $ - $ 8,305 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 316 $ 316 Commercial loans - - 100 100 Home equity lines of credit - - 8 8 Total assets at fair value $ - $ - $ 424 $ 424 There were no transfers between levels within the fair value hierarchy during the three months ended September 30, 2020 and 2019. Impaired loans in the preceding table had a carrying amount of $475,000 and a remaining valuation allowance of $124,000, at September 30, 2020, as compared to $547,000 and 123,000, respectively, as of June 30, 2020. Impaired loans measured at fair value incurred net recoveries of $4,000 and resulted in a credit for loan losses of $3,000 during the three months ended September 30, 2020. Impaired loans measured at fair value as of September 30, 2019 incurred no net charge-offs and resulted in an additional credit for loan losses of $6,000 during the three months ended September 30, 2019. The following tables present quantitative information about Level 3 fair value measurements for selected financial instruments measured at fair value on a non-recurring basis at September 30, 2020 and June 30, 2020 (dollars in thousands): Valuation Unobservable Range or Fair Value Technique(s) Input(s) Rate Used September 30, 2020 Impaired loans - residential mortgages $ 318 Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - home equity lines of credit 18 Discounted cash flow Discount rate 3.3% to 6.3% Impaired loans - commercial loans 15 Discounted cash flow Discount rate 7.0% June 30, 2020 Impaired loans - residential mortgages $ 316 Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - home equity lines of credit 8 Discounted cash flow Discount rate 6.3% Impaired loans - commercial loans 100 Discounted cash flow Discount rate 6.8% to 7.5% The following is a summary of the carrying amounts and estimated fair values of the Company’s financial assets and liabilities, none of which are held for trading purposes (in thousands): Carrying Fair Value Measurements Amount Level 1 Level 2 Level 3 Total September 30, 2020 Financial assets: Cash and cash equivalents $ 162,739 $ 162,739 $ - $ - $ 162,739 Investment securities held to maturity 287,370 - 289,010 4,800 293,810 Investment securities available for sale 31,139 - 31,139 - 31,139 Loans receivable, net 1,227,913 - - 1,207,943 1,207,943 Accrued interest receivable 6,729 - 1,310 5,419 6,729 FHLB stock 6,307 N/A N/A N/A N/A Derivative assets - interest rate contracts 8,094 - 8,094 - 8,094 Financial liabilities: Demand, NOW, money market deposits and savings accounts 935,001 935,001 - - 935,001 Time deposits 442,011 - 451,034 - 451,034 Mortgage escrow funds 6,420 6,420 - - 6,420 Accrued interest payable 252 2 250 - 252 FHLB advances 106,056 - 110,762 - 110,762 Derivative liabilities - interest rate contracts 8,094 - 8,094 - 8,094 Carrying Fair Value Measurements Amount Level 1 Level 2 Level 3 Total June 30, 2020 Financial assets: Cash and cash equivalents $ 136,302 $ 136,302 $ - $ - $ 136,302 Investment securities held to maturity 275,772 - 276,847 4,650 281,497 Investment securities available for sale 37,426 - 37,426 - 37,426 Loans receivable, net 1,260,947 - - 1,240,440 1,240,440 Accrued interest receivable 6,880 - 997 5,883 6,880 FHLB stock 6,308 N/A N/A N/A N/A Derivative assets - interest rate contracts 8,305 - 8,305 - 8,305 Financial liabilities: Demand, NOW, money market deposits and savings accounts 926,989 926,989 - - 926,989 Time deposits 446,246 - 456,109 - 456,109 Mortgage escrow funds 10,123 10,123 - - 10,123 Accrued interest payable 246 1 245 246 FHLB advances 106,089 - 110,937 - 110,937 Derivative liabilities - interest rate contracts 8,305 - 8,305 - 8,305 The methods of determining the fair value of assets and liabilities presented in the table above are consistent with our methodologies disclosed in the Company's Consolidated Financial Statements included in the Annual Report on Form 10-K.

Regulatory Matters

Regulatory Matters	3 Months Ended
	Sep. 30, 2020
Banking And Thrift Other Disclosures [Abstract]
Regulatory Matters	Note 8. Regulatory Matters The following is a summary of the Bank’s actual capital amounts and ratios as of September 30, 2020 and June 30, 2020, compared to the required ratios for minimum capital adequacy and for classification as well capitalized (dollars in thousands). To Be Well Capitalized For Capital Under Prompt Adequacy Corrective Action Bank Actual Purposes Provisions Amount Ratio Amount Ratio Amount Ratio September 30, 2020 PCSB Bank Leverage (Tier 1) $ 223,304 12.4 % $ 72,002 4.0 % $ 90,003 5.0 % Risk-based: Common Tier 1 223,304 17.6 57,228 4.5 82,662 6.5 Tier 1 223,304 17.6 76,304 6.0 101,738 8.0 Total 231,976 18.2 101,738 8.0 127,173 10.0 June 30, 2020 PCSB Bank Leverage (Tier 1) $ 220,310 12.5 % $ 70,432 4.0 % $ 88,040 5.0 % Risk-based: Common Tier 1 220,310 17.0 58,389 4.5 84,339 6.5 Tier 1 220,310 17.0 77,852 6.0 103,802 8.0 Total 228,949 17.0 103,802 8.0 129,753 10.0 In addition to the ratios above, the Basel III Capital Rules have established that community banking institutions must maintain a capital conservation buffer of common equity Tier 1 capital in an amount greater than 2.5% of total risk-weighted assets to avoid being subject to limitations on capital distributions and discretionary bonus payments to executive officers. Management believes that as of September 30, 2020 and June 30, 2020, the Bank met all capital adequacy requirements to which it was subject, including the capital conservation buffer of 2.5%, as of September 30, 2020 and June 30, 2020, respectively. Further, the most recent FDIC notification categorized the Bank as a well-capitalized institution under the prompt corrective action regulations. There have been no conditions or events since that notification that management believes have changed the Bank’s capital classification.

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	3 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Share ("EPS")	Note 9. Earnings Per Share (“EPS”) Basic EPS is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted EPS is calculated in a similar matter, except that the denominator includes the number of additional common shares that would have been outstanding if potentially dilutive common shares were issued using the treasury stock method. Dilutive financial instruments include stock options and unvested restricted stock. The following table provides factors used in the earnings per share computation for the three months ended September 30 th 2020 2019 (amounts in thousands, except share and per share data) Net income applicable to common stock $ 2,728 $ 2,829 Average number of common shares outstanding 16,404,886 17,178,824 Less: Average unallocated ESOP shares (1,102,048 ) (1,199,062 ) Average number of common shares outstanding used to calculate basic earnings per common share 15,302,838 15,979,762 Effect of equity-based awards 111 102,514 Average number of common shares outstanding used to calculate diluted earnings per common share 15,302,949 16,082,276 Earnings per common share: Basic $ 0.18 $ 0.18 Diluted $ 0.18 $ 0.18 Stock options for 1,345,293 and 1,339,293 shares of common stock were not considered in computing diluted earnings per common share for the three months ended September 30, 2020 and 2019, respectively because they were antidilutive.

Derivatives and Hedging

Derivatives and Hedging	3 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	Note 10. Derivatives and Hedging Derivatives not designated as hedges may be used to manage the Company’s exposure to interest rate movements or to provide service to customers. The Company executes interest rate swaps with commercial lending customers to facilitate their respective risk management strategies. These interest rate swaps with customers are simultaneously offset by interest rate swaps that the Company executes with a third party in order to minimize the net risk exposure resulting from such transactions. These interest rate swap agreements do not qualify for hedge accounting treatment, and therefore changes in fair value are reported in current period earnings. The following table presents summary information about the interest rate swaps as of September 3 0, 2020 and June 30, 2020. September 30, June 30, 2020 2020 (dollars in thousands) Notional amounts $ 168,462 $ 159,242 Weighted average pay rates 2.53 % 2.54 % Weighted average receive rates 2.53 % 2.54 % Weighted average maturity 9.10 years 9.31 years Fair value of combined interest rate swaps $ - $ -

Revenue From Contracts With Cus

Revenue From Contracts With Customers	3 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Revenue From Contracts With Customers	Note 11. Revenue From Contracts With Customers In accordance with ASC 606, revenue is recognized when a customer obtains control of promised services. The amount of revenue recognized reflects the consideration to which the Company expects to be entitled to receive in exchange for these services. The Company applies the following five steps to properly recognize revenue: 1. Identify the contract with a customer. 2. Identify the performance obligations in the contract. 3. Determine the transaction price. 4. Allocate the transaction price to performance obligations in the contract. 5. Recognize revenue when (or as) the Company satisfies a performance obligation. The following table presents summary information about sources of revenue from contracts with customers as of September 30 th 2020 2019 (in thousands) Noninterest income: Service charges on deposits $ 162 $ 256 Interchange fees 131 117 Other (1) 29 29 Fees and service charges 322 402 Bank-owned life insurance (1) 132 137 Swap income (1) 129 170 Net gain on sale of foreclosed real estate - 47 Other (1) 11 9 Other noninterest income 11 56 Total noninterest income $ 594 $ 765 (1) Fees and Service Charges on Deposit Accounts . The Company earns fees from its deposit customers for transaction-based, account maintenance, and overdraft services. Transaction-based fees, which include services such as ATM use fees, stop payments, statement rendering, and ACH fees, are recognized at the time the transaction is executed as that is the point in time the Company fulfills the customer’s request. Account maintenance fees, which relate primarily to monthly maintenance, are earned over the course of the month, representing the period over which the Company satisfied the performance obligation. Overdraft fees are recognized at the point in time that the overdraft occurs. Service charges on deposits are withdrawn from the customer’s account balance. Interchange Income . The Company earns interchange fees from debit cardholder transactions conducted through various payment networks. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder. Gain on Sales of Foreclosed Real Estate . The Company records a gain or loss from the sale of foreclosed real estate when control of the property transfers to the buyer, which generally occurs at the time of an executed deed. When the Company finances the sale of foreclosed real estate to the buyer, the Company assesses whether the buyer is committed to perform their obligations under the contract and whether collectability of the transaction price is probable. Once these criteria are met, the foreclosed real estate asset is derecognized and the gain or loss on sale is recorded upon the transfer of control of the property to the buyer. In determining the gain or loss on the sale, the Company adjusts the transaction price and related gain (loss) on sale if a significant financing component is present.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	Note 12. Stock-Based Compensation On October 24, 2018, the Company’s shareholders approved the PCSB Financial Corporation 2018 Equity Incentive Plan (the “Plan”), which permits the grant of stock options and restricted stock and/or restricted stock units. The total number of shares that may be granted under the Plan is 2,543,115, of which 1,816,511 shares may be granted as stock options and 726,604 shares may be granted as restricted stock and restricted stock units. Total compensation cost that has been charged against income for the Plan was $829,000 and $830,000 for the three months ended September 30, 2020 and 2019, respectively. Restricted Stock Awards (“RSAs”) RSAs provide for the issuance of shares to both employees and non-employee directors. These awards generally vest over a 5-year period, with 20% vesting each year on the anniversary of the award. All awards were made at the fair value of common stock on the grant date. Compensation expense is recognized over the vesting period of the awards based on the fair value of the stock at grant date. The fair value of the stock was determined to be the closing price of the stock on the NASDAQ exchange. Total shares available for grant under the Plan are 726,604, of which 550,185 shares were granted as of September 30, 2020. The following table presents a summary of RSA activity during the period ended September 30, 2020. Number of Shares Weighted-Average Grant Date Fair Value Unvested granted shares outstanding at July 1, 2020 437,737 $ 19.02 Shares granted 3,000 12.34 Shares vested - - Shares forfeited - - Unvested granted shares at September 30, 2020 440,737 $ 18.97 As of September 30, 2020, there was $6.5 million of total unrecognized compensation cost related to non-vested shares granted under the Plan. The cost is expected to be recognized over a weighted-average period of 3.2 years. Stock Option Awards Stock options awarded to employees under the Plan are considered incentive stock options (ISOs), up to applicable limits. Option awards are generally granted with an exercise price equal to the market price of the Company’s common stock at the date of grant. Those issued to non-employee directors, as well as those exceeding ISO limitations, are considered non-qualified stock options (NQSOs). Options generally vest over a 5-year period, with 20% vesting each year on the anniversary of the award, however, may not vest more rapidly than over a three-year The fair value of each option award is estimated on the date of grant using a closed f or m option valuation (Black-Scholes) model that uses the assumptions noted in the following table. Expected volatilities are based on the historical volatilities of a peer group of publicly traded financial institutions. The expected term of options granted is based on the simplified “mid-point” approach which utilizes the weighted average vesting period and contractual term . The risk-free interest rate for the expected term of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. The fair value of options granted during the three months ended September 30, 2020, was determined using the following weighted-average assumptions as of grant date. Risk-free interest rate 0.39 % Expected term (in years) 6.25 Expected stock price volatility 35.75 % Dividend yield 1.30 % Weighted average fair value of options granted $ 3.72 As of September 30, 2020, there was $3.8 million of total unrecognized compensation cost related to non-vested stock options granted under the Plan. The cost is expected to be recognized over a weighted-average period of 3.2 years. Total shares available for grant under the Plan are 1,816,511, of which 1,345,293 shares were granted as of September 30, 2020 . Number of Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Years Aggregate Intrinsic Value (dollars in thousands, except share and per share data) Options outstanding at July 1, 2020 1,339,293 $ 19.04 $ - Options granted 6,000 12.34 Options expired - - Options exercised - - Options outstanding at September 30, 2020 1,345,293 $ 19.01 8.1 $ - Exercisable at September 30, 2020 267,859 $ 19.04 8.1 $ -

Leases

Leases	3 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	Note 13. Leases As of September 30, 2020, the Company leases real estate for eleven branch offices and one administrative office, including its corporate headquarters, under various operating lease agreements. The Company’s leases have maturities which range from 2021 to 2041, some of which include lessee options to extend the lease term. The weighted average remaining life of the lease terms for these leases was 9.9 years as of September 30, 2020. The operating lease asset and lease liability are determined at the commencement date of the lease based on the present value of the lease payments. As most of our leases do not provide an implicit rate, the Company used its incremental borrowing rate, the rate of interest to borrow on a collateralized basis for a similar term, at the lease commencement date. The Company utilized a weighted average discount rate of 2.43% in determining the lease liability as of September 30, 2020. The Company made a policy election to exclude the recognition requirements of ASC 842 to short-term leases, those leases with original terms of 12 months or less. Short-term lease payments are recognized in the income statement on a straight-line basis over the lease term. The Company had no short-term lease cost for the three months ended September 30, 2020 or 2019. Certain leases may include one or more options to renew. The exercise of lease renewal options is typically at the Company’s discretion and are included in the operating lease liability if it is reasonably certain that the renewal option will be exercised. Certain real estate leases may contain lease and non-lease components, such as common area maintenance charges, real estate taxes, and insurance, which are generally accounted for separately and are not included in the measurement of the lease liability since they are generally able to be segregated. The Company does not sublease any of its leased properties. There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the three months ended September 30 , 20 20 or 2019 . For the three months ended September 30, 2020 and 2019, total operating lease cost was $504,000 and $497,000, respectively, and is included in occupancy and equipment expense. The right-of-use asset, included in premises and equipment, net, was $10.6 million and the corresponding lease liability, included in other liabilities was $10.8 million as of September 30, 2020. Future minimum lease payments for the fiscal years ending June 30 and a reconciliation of undiscounted lease cash flows and the lease liability recognized in the consolidated balance sheet as of September 30, 2020 is shown below: (dollars in thousands) 2021 $ 1,486 2022 1,937 2023 1,850 2024 1,479 2025 1,186 Thereafter 4,475 Total future minimum lease payments (undiscounted) 12,413 Discounting effect on cash flows (1,622 ) Lease liability (discounted) $ 10,791

Subsequent Events

Subsequent Events	3 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Note 14. Subsequent Events Subsequent to September 30, 2020, and through November 4, 2020, the Company repurchased 216,500 shares of common stock, at an average cost of $13.18 per share.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations PCSB Bank is a community-oriented financial institution that provides financial services to individuals and businesses within its market area of Putnam, Southern Dutchess, Rockland and Westchester Counties in New York. The Bank is a state-chartered commercial bank and its deposits are insured up to applicable limits by the Deposit Insurance Fund of the Federal Deposit Insurance Corporation (“FDIC”). The Bank’s primary regulators are the FDIC and the NYSDFS.
Basis of Presentation	Basis of Presentation The unaudited consolidated financial statements contained herein reflect all normal recurring adjustments that are, in the opinion of management, necessary for a fair presentation of the results for the interim periods presented. Such adjustments are the only adjustments reflected in the consolidated financial statements contained herein. The results of operations for the current period presented are not necessarily indicative of the results of operations that may be expected for the entire current fiscal year. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended June 30, 2020, included in the Company's Annual Report on Form 10-K. Certain prior period amounts have been reclassified to conform to the current presentation. Reclassifications had no effect on prior period net income or equity.
Risks and Uncertainties	Risks and Uncertainties: The COVID-19 pandemic has created extensive disruptions to the global and U.S. economies and to the lives of individuals throughout the world. The New York City Metropolitan area and environs have had the highest incidence of COVID-19 in the nation, and the neighboring Tri-State area of New Jersey and Connecticut also has been particularly affected by COVID-19. Governments, businesses, and the public are taking unprecedented actions to contain the spread of COVID-19 and to mitigate its effects, including quarantines, travel bans, shelter-in-place orders, closures of businesses and schools, fiscal and monetary stimulus, and legislation designed to deliver financial aid and other relief. While the scope, duration, and full effects of COVID-19 are rapidly evolving and not fully known, the pandemic and the efforts to contain it have disrupted global economic activity, adversely affected the functioning of financial markets, impacted market interest rates, increased economic and market uncertainty, and disrupted trade and supply chains. The ultimate financial impact is unknown at this time. However, if these actions are sustained, it may adversely impact several industries within our geographic footprint and impair the ability of the Company’s customers to fulfill their contractual obligations to the Company. This could cause the Company to experience a material adverse effect on our business operations, asset valuations, financial condition, and results of operations. Material adverse impacts may include all or a combination of valuation impairments of the Company’s intangible assets, investments, loans, or deferred tax assets. As it relates to the allowance for loan losses, the Company continues to assess the economic impacts the COVID-19 pandemic has had on our local economy and loan portfolio. The Company has taken actions to identify, assess and address its COVID-19 related credit exposure. Many factors are unknown, including the length of the resulting economic shutdown imposed by New York State and other neighboring states, the impacts of the government ’s fiscal and monetary relief measures, including payment deferral programs, as well as the long-term impacts COVID-19 may have on our consumer and commercial borrowers. It is reasonably possible that the Company’s allowance for loan loss estimate as of September 3 0 , 2020 will change in the near term and could result in a material change to the Company’s provision for loan losses, earnings and capital.
Use of Estimates	Use of Estimates
Recent Accounting Pronouncements	The pronouncements discussed below are not intended to be an all-inclusive list, but rather only those pronouncements that could potentially have a material impact on our financial position, results of operations or disclosures. There were no accounting standards adopted in the current period Future Application of Accounting Pronouncements Previously Issued In June 2016, the FASB issued ASU 2016-13 “Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 affects entities holding financial assets that are not accounted for at fair value through net income, including loans, debt securities, and other financial assets. The ASU requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected by recording an allowance for current expected credit losses. In October 2019, the FASB unanimously voted to delay the implementation of the standard for three years for certain companies, including small reporting companies (as defined by the SEC), non-SEC public companies and private companies. The Company currently qualifies as a small reporting company and is subject to the delayed implementation. Therefore, t he amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2023, including interim periods within that fiscal year. The Company is actively working through the provisions of the Update. Management has established a steering committee which is identifying the methodologies and the additional data requirements necessary to implement the Update and has engaged a third-party software service provider to assist in the Company's implementation. Management is currently evaluating the impact that ASU 2016-13 will have on the Company’s consolidated financial position, results of operations and disclosures.

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Sep. 30, 2020
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost, Gross Unrealized/Unrecognized Gains and Losses and Fair Value of Available for Sale and Held to Maturity Debt Securities	The amortized cost, gross unrealized/unrecognized gains and losses and fair value of available for sale and held to maturity debt securities at September 30, 2020 and June 30, 2020 were as follows: September 30, 2020 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 7,000 $ 17 $ - $ 7,017 Corporate and other debt securities 5,031 90 - 5,121 Mortgage-backed securities – residential 18,582 432 (13 ) 19,001 Total available for sale $ 30,613 $ 539 $ (13 ) $ 31,139 Held to maturity: U.S. Government and agency obligations $ 38,001 $ 391 $ (1 ) $ 38,391 Corporate and other debt securities 73,994 798 (1,266 ) 73,526 Mortgage-backed securities – residential 112,035 4,316 (10 ) 116,341 Mortgage-backed securities – collateralized mortgage obligations 44,621 1,488 (9 ) 46,100 Mortgage-backed securities – commercial 18,719 733 - 19,452 Total held to maturity $ 287,370 $ 7,726 $ (1,286 ) $ 293,810 June 30, 2020 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 11,002 $ 47 $ - $ 11,049 Corporate and other debt securities 5,038 82 - 5,120 Mortgage-backed securities – residential 20,844 428 (15 ) 21,257 Total available for sale $ 36,884 $ 557 $ (15 ) $ 37,426 Held to maturity: U.S. Government and agency obligations $ 42,001 $ 454 $ (5 ) $ 42,450 Corporate and other debt securities 52,790 332 (1,510 ) 51,612 Mortgage-backed securities – residential 117,160 4,291 (17 ) 121,434 Mortgage-backed securities – collateralized mortgage obligations 45,047 1,487 (31 ) 46,503 Mortgage-backed securities – commercial 18,774 724 - 19,498 Total held to maturity $ 275,772 $ 7,288 $ (1,563 ) $ 281,497
Fair Value and Carrying Amount of Debt Securities by Contractual Maturity	The following table presents the fair value and carrying amount of debt securities at September 30, 2020, by contractual maturity (in thousands). Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. Held to maturity Available for sale Carrying Fair Amortized Fair Amount Value Cost Value 1 year or less $ 11,037 $ 11,089 $ 7,000 $ 7,018 1 to 5 years 32,165 32,266 5,031 5,120 5 to 10 years 38,716 38,487 - - over 10 years 26,121 25,894 Mortgage-backed securities and other 179,331 186,074 18,582 19,001 Total $ 287,370 $ 293,810 $ 30,613 $ 31,139
Investment Securities with Fair Value and Unrealized Losses	The following table provides information regarding investment securities with unrealized/unrecognized losses, aggregated by investment category and length of time that individual securities had been in a continuous unrealized loss position at September 30, 2020 and June 30, 2020 September 30, 2020 Less than 12 months 12 months or greater Total Unrealized/ Unrealized/ Unrealized/ Fair Unrecognized Fair Unrecognized Fair Unrecognized Value Loss Value Loss Value Loss (in thousands) Available for sale: Mortgage-backed securities – residential $ 662 $ (9 ) $ 760 $ (4 ) $ 1,422 $ (13 ) Total available for sale $ 662 $ (9 ) $ 760 $ (4 ) $ 1,422 $ (13 ) Held to maturity: U.S. Government and agency obligations $ 2,500 $ (1 ) $ - $ - $ 2,500 $ (1 ) Corporate and other debt securities 30,144 (738 ) 16,972 (528 ) 47,116 (1,266 ) Mortgage-backed securities – residential 2,062 (10 ) - - 2,062 (10 ) Mortgage-backed securities – collateralized mortgage obligations 5,302 (9 ) - - 5,302 (9 ) Total held to maturity $ 40,008 $ (758 ) $ 16,972 $ (528 ) $ 56,980 $ (1,286 ) June 30, 2020 Less than 12 months 12 months or greater Total Unrealized/ Unrealized/ Unrealized/ Fair Unrecognized Fair Unrecognized Fair Unrecognized Value Loss Value Loss Value Loss (in thousands) Available for sale Mortgage-backed securities – residential $ 1,450 $ (15 ) $ - $ - $ 1,450 $ (15 ) Total available for sale $ 1,450 $ (15 ) $ - $ - $ 1,450 $ (15 ) Held to maturity U.S. Government and agency obligations $ 11,995 $ (5 ) $ - $ - $ 11,995 $ (5 ) Corporate and other debt securities 30,751 (1,055 ) 12,045 (455 ) 42,796 (1,510 ) Mortgage-backed securities – residential 5,130 (17 ) - - 5,130 (17 ) Mortgage-backed securities – collateralized mortgage obligations 2,627 (31 ) - - 2,627 (31 ) Total held to maturity $ 50,503 $ (1,108 ) $ 12,045 $ (455 ) $ 62,548 $ (1,563 )

Loans Receivable (Tables)

Loans Receivable (Tables)	3 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable are summarized as follows (in thousands): September 30, June 30, 2020 2020 Mortgage loans: Residential $ 245,008 $ 255,382 Commercial 794,248 807,106 Construction 11,512 11,053 Net deferred loan origination costs 666 739 Total mortgage loans 1,051,434 1,074,280 Commercial and consumer loans: Commercial loans 155,569 164,257 Home equity lines of credit 29,249 29,838 Consumer and overdrafts 308 481 Net deferred loan origination costs 25 730 Total commercial and consumer loans 185,151 195,306 Total loans receivable 1,236,585 1,269,586 Allowance for loan losses (8,672 ) (8,639 ) Loans receivable, net $ 1,227,913 $ 1,260,947
Summary of Activity in Allowance for Loan Losses by Portfolio Segment	The following tables present the activity in the allowance for loan losses by portfolio segment for the three months ended September 30 , 20 20 and 201 9 (in thousands): Three Months Ended September 30, 2020 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Residential $ 373 $ (33 ) $ - $ 2 $ 342 Commercial 6,913 53 - - 6,966 Construction 165 8 - - 173 Commercial loans 1,124 71 (105 ) 31 1,121 Home equity lines of credit 60 1 - 2 63 Consumer and overdrafts 4 9 (8 ) 2 7 Total $ 8,639 $ 109 $ (113 ) $ 37 $ 8,672 Three Months Ended September 30, 2019 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Residential $ 446 $ (106 ) $ - $ 3 $ 343 Commercial 3,853 461 - - 4,314 Construction 159 63 - - 222 Commercial loans 1,130 (89 ) - - 1,041 Home equity lines of credit 65 (9 ) - 5 61 Consumer and overdrafts 11 15 (18 ) 4 12 Total $ 5,664 $ 335 $ (18 ) $ 12 $ 5,993
Summary of Balance in Allowance for Loan Losses and Recorded investment in Loans by Portfolio Segment, and Based on Impairment Method	The following tables present the balance in the allowance for loan losses and the recorded investment in loans, excluding net deferred fees and accrued interest, by portfolio segment, and based on impairment method as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 Loans Allowance for Loan Losses Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Residential $ 2,440 $ 241,837 $ 731 $ 245,008 $ 115 $ 227 $ - $ 342 Commercial - 793,362 886 794,248 - 6,966 - 6,966 Construction - 11,512 - 11,512 - 173 - 173 Commercial loans 1,804 153,765 - 155,569 - 1,121 - 1,121 Home equity lines of credit 365 28,749 135 29,249 8 55 - 63 Consumer and overdrafts - 308 - 308 - 7 - 7 Total $ 4,609 $ 1,229,533 $ 1,752 $ 1,235,894 $ 123 $ 8,549 $ - $ 8,672 June 30, 2020 Loans Allowance for Loan Losses Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Acquired With Deteriorated Credit Quality Total Residential $ 2,448 $ 252,195 $ 739 $ 255,382 $ 118 $ 255 $ - $ 373 Commercial - 806,224 882 807,106 - 6,913 - 6,913 Construction - 11,053 - 11,053 - 165 - 165 Commercial loans 1,921 162,336 - 164,257 1 1,123 - 1,124 Home equity lines of credit 350 29,349 139 29,838 4 56 - 60 Consumer and overdrafts - 481 - 481 - 4 - 4 Total $ 4,719 $ 1,261,638 $ 1,760 $ 1,268,117 $ 123 $ 8,516 $ - $ 8,639
Summary of Loans Individually Evaluated for Impairment (Excluding Loans Acquired with Deteriorated Credit Quality) by Portfolio Segment	The following tables present information related to loans individually evaluated for impairment (excluding loans acquired with deteriorated credit quality) by portfolio segment as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 June 30, 2020 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Unpaid Principal Balance Recorded Investment Allowance for Loan Losses With no related allowance recorded: Residential $ 2,114 $ 2,007 $ - $ 2,123 $ 2,013 $ - Commercial loans 1,960 1,789 - 2,067 1,897 - Home equity lines of credit 326 338 - 326 339 - With an allowance recorded: Residential 370 433 115 372 435 118 Commercial loans 15 15 - 24 24 1 Home equity lines of credit 27 27 8 11 11 4 Total $ 4,812 $ 4,609 $ 123 $ 4,923 $ 4,719 $ 123
Summary of Average Recorded Investment and Interest Income Recognized on Loans Individually Evaluated for Impairment, by Portfolio Segment	The tables below present the average recorded investment and interest income recognized on loans individually evaluated for impairment, by portfolio segment, for the three months ended September 30, 2020 and 2019 (in thousands): Three months ended Three months ended September 30, 2020 September 30, 2019 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 2,015 $ 8 $ 1,735 $ 6 Commercial - - 1,411 12 Commercial loans 1,809 49 1,825 50 Home equity lines of credit 339 - 680 - With an allowance recorded: Residential 434 3 738 3 Commercial loans 15 - 180 1 Home equity lines of credit 16 - 11 - Total $ 4,628 $ 60 $ 6,580 $ 72
Nonaccrual Loans and in Loans Past Due over 90 Days Still on Accrual Status by Portfolio Segment	The following table presents the recorded investment in nonaccrual loans and in loans past due over 90 days and still on accrual status, by portfolio segment, as of September 30, 2020 and June 30, 2020 (in thousands): Loans Past Due Over 90 Days Nonaccrual and Still Accruing September 30, June 30, September 30, June 30, 2020 2020 2020 2020 Residential $ 1,454 $ 1,457 $ - $ - Commercial loans 247 - - - Home equity lines of credit 383 338 - - Total $ 2,084 $ 1,795 $ - $ -
Aging of Recorded Investment in Past Due Loans by Portfolio Segment	The following tables present the aging of the recorded investment in past due loans by portfolio segment as of September 30, 2020 and June 30, 2020 (in thousands): September 30, 2020 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current (1) Total Residential $ - $ 286 $ 813 $ 1,099 $ 243,909 $ 245,008 Commercial - - - - 794,248 794,248 Construction - - - - 11,512 11,512 Commercial loans 83 226 247 556 155,013 155,569 Home equity lines of credit - - 383 383 28,866 29,249 Consumer and overdrafts - - - - 308 308 Total $ 83 $ 512 $ 1,443 $ 2,038 $ 1,233,856 $ 1,235,894 June 30, 2020 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current (1) Total Residential $ 495 $ 10 $ 806 $ 1,311 $ 254,071 $ 255,382 Commercial - - - - 807,106 807,106 Construction - - - - 11,053 11,053 Commercial loans 76 - - 76 164,181 164,257 Home equity lines of credit 44 - 338 382 29,456 29,838 Consumer and overdrafts - - - - 481 481 Total $ 615 $ 10 $ 1,144 $ 1,769 $ 1,266,348 $ 1,268,117 (1)
Summary of Risk Category of Loans by Portfolio Segment	Based on the most recent analysis performed, the risk category of loans by portfolio segment is as follows (in thousands): September 30, 2020 Pass Special Mention Substandard Total Residential $ 242,366 $ 563 $ 2,079 $ 245,008 Commercial 780,620 12,742 886 794,248 Construction 11,512 - - 11,512 Commercial loans 151,189 463 3,917 155,569 Home equity lines of credit 28,357 449 443 29,249 Consumer and overdrafts 308 - - 308 Total $ 1,214,352 $ 14,217 $ 7,325 $ 1,235,894 June 30, 2020 Pass Special Mention Substandard Total Residential $ 252,604 $ 687 $ 2,091 $ 255,382 Commercial 803,048 3,176 882 807,106 Construction 11,053 - - 11,053 Commercial loans 160,137 201 3,919 164,257 Home equity lines of credit 28,894 498 446 29,838 Consumer and overdrafts 481 - - 481 Total $ 1,256,217 $ 4,562 $ 7,338 $ 1,268,117
Schedule of Carrying Amount of Purchased Credit Impaired Loans	The carrying amount of those loans as of September 30, 2020 and June 30, 2020 is as follows (in thousands): September 30, June 30, 2020 2020 Residential $ 731 $ 739 Commercial 886 882 Home equity lines of credit 135 139 Carrying amount, net of allowance of $0 $ 1,752 $ 1,760
Summary of Accretable Yield, or Income Expected to be Collected for Acquired Loans	Accretable yield, or income expected to be collected, for acquired loans is as follows (in thousands): Three Months Ended September 30, 2020 2019 Beginning balance $ 156 $ 192 New loans acquired - - Accretion income (5 ) (10 ) Reclassification from non-accretable difference - - Disposals - - Ending balance $ 151 $ 182

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Summary of Accumulated Other Comprehensive Income (Loss)	The following is a summary of the accumulated other comprehensive income (loss) balances, net of tax (in thousands): Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2020 $ 428 $ (6,605 ) $ (226 ) $ (6,403 ) Other comprehensive (loss) income before reclassifications (16 ) - - (16 ) Amounts reclassified from accumulated other comprehensive income - 240 14 254 Less tax effect 3 (51 ) (3 ) (51 ) Net other comprehensive (loss) income (13 ) 189 11 187 Balance at September 30, 2020 $ 415 $ (6,416 ) $ (215 ) $ (6,216 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2019 $ (209 ) $ (4,631 ) $ (250 ) $ (5,090 ) Other comprehensive income before reclassifications 181 - - 181 Amounts reclassified from accumulated other comprehensive income - 133 11 144 Less tax effect (38 ) (29 ) (2 ) (69 ) Net other comprehensive income 143 104 9 256 Balance at September 30, 2019 $ (66 ) $ (4,527 ) $ (241 ) $ (4,834 )

Post-Retirement Benefits (Table

Post-Retirement Benefits (Tables)	3 Months Ended
	Sep. 30, 2020
Compensation And Retirement Disclosure [Abstract]
Schedule of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income	Net periodic benefit cost and other amounts recognized in other comprehensive income for the three months ended September 30, 2020 and 2019 (in thousands): Three Months Ended Three Months Ended September 30, 2020 September 30, 2019 Defined Benefit Plan Supplemental Retirement Plans Defined Benefit Plan Supplemental Retirement Plans Service cost $ - $ 90 $ - $ 79 Interest cost 136 24 180 31 Expected return on plan assets (456 ) - (479 ) - Amortization of prior net loss 240 14 133 11 Net periodic cost (benefit) $ (80 ) $ 128 $ (166 ) $ 121
Shares Held by ESOP	Shares held by the ESOP include the following (dollars in thousands): September 30, 2020 June 30, 2020 Allocated to participants 352,463 327,206 Unearned 1,090,110 1,114,529 Total ESOP shares 1,442,573 1,441,735 Fair value of unearned shares $ 13,158 $ 14,132

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value	Assets and liabilities measured at fair value are summarized below (in thousands): Fair Value Measurements Level 1 Level 2 Level 3 Total September 30, 2020 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 7,017 $ - $ 7,017 Corporate and other debt securities - 5,121 - 5,121 Mortgage-backed securities – residential - 19,001 - 19,001 Derivatives – interest rate contracts - 8,094 - 8,094 Total assets at fair value $ - $ 39,233 $ - $ 39,233 Derivatives – interest rate contracts $ - $ 8,094 $ - $ 8,094 Total liabilities at fair value $ - $ 8,094 $ - $ 8,094 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 318 $ 318 Commercial loans - - 15 15 Home equity lines of credit - - 18 18 Total assets at fair value $ - $ - $ 351 $ 351 Fair Value Measurements Level 1 Level 2 Level 3 Total June 30, 2020 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 11,049 $ - $ 11,049 Corporate and other debt securities - 5,120 - 5,120 Mortgage-backed securities – residential - 21,257 - 21,257 Derivatives – interest rate contracts - 8,305 - 8,305 Total assets at fair value $ - $ 45,731 $ - $ 45,731 Derivatives – interest rate contracts $ - $ 8,305 $ - $ 8,305 Total liabilities at fair value $ - $ 8,305 $ - $ 8,305 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 316 $ 316 Commercial loans - - 100 100 Home equity lines of credit - - 8 8 Total assets at fair value $ - $ - $ 424 $ 424
Summary of Quantitative Information about Level 3 Fair Value Measurements for Selected Financial Instruments Measured at Fair Value on Non-recurring Basis	The following tables present quantitative information about Level 3 fair value measurements for selected financial instruments measured at fair value on a non-recurring basis at September 30, 2020 and June 30, 2020 (dollars in thousands): Valuation Unobservable Range or Fair Value Technique(s) Input(s) Rate Used September 30, 2020 Impaired loans - residential mortgages $ 318 Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - home equity lines of credit 18 Discounted cash flow Discount rate 3.3% to 6.3% Impaired loans - commercial loans 15 Discounted cash flow Discount rate 7.0% June 30, 2020 Impaired loans - residential mortgages $ 316 Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - home equity lines of credit 8 Discounted cash flow Discount rate 6.3% Impaired loans - commercial loans 100 Discounted cash flow Discount rate 6.8% to 7.5%
Summary of Carrying Amounts and Estimated Fair Values of Bank's Financial Assets and Liabilities	The following is a summary of the carrying amounts and estimated fair values of the Company’s financial assets and liabilities, none of which are held for trading purposes (in thousands): Carrying Fair Value Measurements Amount Level 1 Level 2 Level 3 Total September 30, 2020 Financial assets: Cash and cash equivalents $ 162,739 $ 162,739 $ - $ - $ 162,739 Investment securities held to maturity 287,370 - 289,010 4,800 293,810 Investment securities available for sale 31,139 - 31,139 - 31,139 Loans receivable, net 1,227,913 - - 1,207,943 1,207,943 Accrued interest receivable 6,729 - 1,310 5,419 6,729 FHLB stock 6,307 N/A N/A N/A N/A Derivative assets - interest rate contracts 8,094 - 8,094 - 8,094 Financial liabilities: Demand, NOW, money market deposits and savings accounts 935,001 935,001 - - 935,001 Time deposits 442,011 - 451,034 - 451,034 Mortgage escrow funds 6,420 6,420 - - 6,420 Accrued interest payable 252 2 250 - 252 FHLB advances 106,056 - 110,762 - 110,762 Derivative liabilities - interest rate contracts 8,094 - 8,094 - 8,094 Carrying Fair Value Measurements Amount Level 1 Level 2 Level 3 Total June 30, 2020 Financial assets: Cash and cash equivalents $ 136,302 $ 136,302 $ - $ - $ 136,302 Investment securities held to maturity 275,772 - 276,847 4,650 281,497 Investment securities available for sale 37,426 - 37,426 - 37,426 Loans receivable, net 1,260,947 - - 1,240,440 1,240,440 Accrued interest receivable 6,880 - 997 5,883 6,880 FHLB stock 6,308 N/A N/A N/A N/A Derivative assets - interest rate contracts 8,305 - 8,305 - 8,305 Financial liabilities: Demand, NOW, money market deposits and savings accounts 926,989 926,989 - - 926,989 Time deposits 446,246 - 456,109 - 456,109 Mortgage escrow funds 10,123 10,123 - - 10,123 Accrued interest payable 246 1 245 246 FHLB advances 106,089 - 110,937 - 110,937 Derivative liabilities - interest rate contracts 8,305 - 8,305 - 8,305

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Sep. 30, 2020
Banking And Thrift Other Disclosures [Abstract]
Summary of Bank's Actual Capital Amounts and Ratios Compared to Required Ratios for Minimum Capital Adequacy and for Classification as Well Capitalized	The following is a summary of the Bank’s actual capital amounts and ratios as of September 30, 2020 and June 30, 2020, compared to the required ratios for minimum capital adequacy and for classification as well capitalized (dollars in thousands). To Be Well Capitalized For Capital Under Prompt Adequacy Corrective Action Bank Actual Purposes Provisions Amount Ratio Amount Ratio Amount Ratio September 30, 2020 PCSB Bank Leverage (Tier 1) $ 223,304 12.4 % $ 72,002 4.0 % $ 90,003 5.0 % Risk-based: Common Tier 1 223,304 17.6 57,228 4.5 82,662 6.5 Tier 1 223,304 17.6 76,304 6.0 101,738 8.0 Total 231,976 18.2 101,738 8.0 127,173 10.0 June 30, 2020 PCSB Bank Leverage (Tier 1) $ 220,310 12.5 % $ 70,432 4.0 % $ 88,040 5.0 % Risk-based: Common Tier 1 220,310 17.0 58,389 4.5 84,339 6.5 Tier 1 220,310 17.0 77,852 6.0 103,802 8.0 Total 228,949 17.0 103,802 8.0 129,753 10.0

Earnings Per Share ("EPS") (Tab

Earnings Per Share ("EPS") (Tables)	3 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	The following table provides factors used in the earnings per share computation for the three months ended September 30 th 2020 2019 (amounts in thousands, except share and per share data) Net income applicable to common stock $ 2,728 $ 2,829 Average number of common shares outstanding 16,404,886 17,178,824 Less: Average unallocated ESOP shares (1,102,048 ) (1,199,062 ) Average number of common shares outstanding used to calculate basic earnings per common share 15,302,838 15,979,762 Effect of equity-based awards 111 102,514 Average number of common shares outstanding used to calculate diluted earnings per common share 15,302,949 16,082,276 Earnings per common share: Basic $ 0.18 $ 0.18 Diluted $ 0.18 $ 0.18

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	3 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary Information About Interest Rate Swaps	The following table presents summary information about the interest rate swaps as of September 3 0, 2020 and June 30, 2020. September 30, June 30, 2020 2020 (dollars in thousands) Notional amounts $ 168,462 $ 159,242 Weighted average pay rates 2.53 % 2.54 % Weighted average receive rates 2.53 % 2.54 % Weighted average maturity 9.10 years 9.31 years Fair value of combined interest rate swaps $ - $ -

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	3 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Summary of Sources of Revenue from Contracts with Customers	The following table presents summary information about sources of revenue from contracts with customers as of September 30 th 2020 2019 (in thousands) Noninterest income: Service charges on deposits $ 162 $ 256 Interchange fees 131 117 Other (1) 29 29 Fees and service charges 322 402 Bank-owned life insurance (1) 132 137 Swap income (1) 129 170 Net gain on sale of foreclosed real estate - 47 Other (1) 11 9 Other noninterest income 11 56 Total noninterest income $ 594 $ 765 (1)

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of RSA Activity	The following table presents a summary of RSA activity during the period ended September 30, 2020. Number of Shares Weighted-Average Grant Date Fair Value Unvested granted shares outstanding at July 1, 2020 437,737 $ 19.02 Shares granted 3,000 12.34 Shares vested - - Shares forfeited - - Unvested granted shares at September 30, 2020 440,737 $ 18.97
Summary of Fair Value of Options Granted Using Weighted-Average Assumptions as of Grant Date	The fair value of options granted during the three months ended September 30, 2020, was determined using the following weighted-average assumptions as of grant date. Risk-free interest rate 0.39 % Expected term (in years) 6.25 Expected stock price volatility 35.75 % Dividend yield 1.30 % Weighted average fair value of options granted $ 3.72
Summary of Activity Related to Stock Options Granted under Plan	The following table presents a summary of activity related to stock options granted under the Plan, and changes during the period then ended: Number of Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Years Aggregate Intrinsic Value (dollars in thousands, except share and per share data) Options outstanding at July 1, 2020 1,339,293 $ 19.04 $ - Options granted 6,000 12.34 Options expired - - Options exercised - - Options outstanding at September 30, 2020 1,345,293 $ 19.01 8.1 $ - Exercisable at September 30, 2020 267,859 $ 19.04 8.1 $ -

Leases (Tables)

Leases (Tables)	3 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Schedule of Future Minimum Lease Payments	Future minimum lease payments for the fiscal years ending June 30 and a reconciliation of undiscounted lease cash flows and the lease liability recognized in the consolidated balance sheet as of September 30, 2020 is shown below: (dollars in thousands) 2021 $ 1,486 2022 1,937 2023 1,850 2024 1,479 2025 1,186 Thereafter 4,475 Total future minimum lease payments (undiscounted) 12,413 Discounting effect on cash flows (1,622 ) Lease liability (discounted) $ 10,791

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2020Subsidiary
Basis Of Presentation [Abstract]
Number of subsidiaries	2

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost, Gross Unrealized/Unrecognized Gains and Losses and Fair Value of Available for Sale and Held to Maturity Debt Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	$ 30,613	$ 36,884
Available for sale, Gross Unrealized/Unrecognized Gains	539	557
Available for sale, Gross Unrealized/Unrecognized Losses	(13)	(15)
Available for sale, Fair Value	31,139	37,426
Held to maturity, Amortized Cost	287,370	275,772
Held to maturity, Gross Unrealized/Unrecognized Gains	7,726	7,288
Held to maturity, Gross Unrealized/Unrecognized Losses	(1,286)	(1,563)
Held to maturity, Fair Value	293,810	281,497
U.S. Government and Agency Obligations [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	7,000	11,002
Available for sale, Gross Unrealized/Unrecognized Gains	17	47
Available for sale, Fair Value	7,017	11,049
Held to maturity, Amortized Cost	38,001	42,001
Held to maturity, Gross Unrealized/Unrecognized Gains	391	454
Held to maturity, Gross Unrealized/Unrecognized Losses	(1)	(5)
Held to maturity, Fair Value	38,391	42,450
Corporate and Other Debt Securities [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	5,031	5,038
Available for sale, Gross Unrealized/Unrecognized Gains	90	82
Available for sale, Fair Value	5,121	5,120
Held to maturity, Amortized Cost	73,994	52,790
Held to maturity, Gross Unrealized/Unrecognized Gains	798	332
Held to maturity, Gross Unrealized/Unrecognized Losses	(1,266)	(1,510)
Held to maturity, Fair Value	73,526	51,612
Mortgage-backed Securities - Residential [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	18,582	20,844
Available for sale, Gross Unrealized/Unrecognized Gains	432	428
Available for sale, Gross Unrealized/Unrecognized Losses	(13)	(15)
Available for sale, Fair Value	19,001	21,257
Held to maturity, Amortized Cost	112,035	117,160
Held to maturity, Gross Unrealized/Unrecognized Gains	4,316	4,291
Held to maturity, Gross Unrealized/Unrecognized Losses	(10)	(17)
Held to maturity, Fair Value	116,341	121,434
Mortgage-backed Securities - Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Held to maturity, Amortized Cost	44,621	45,047
Held to maturity, Gross Unrealized/Unrecognized Gains	1,488	1,487
Held to maturity, Gross Unrealized/Unrecognized Losses	(9)	(31)
Held to maturity, Fair Value	46,100	46,503
Mortgage-backed Securities - Commercial [Member]
Schedule of Investments [Line Items]
Held to maturity, Amortized Cost	18,719	18,774
Held to maturity, Gross Unrealized/Unrecognized Gains	733	724
Held to maturity, Fair Value	$ 19,452	$ 19,498

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2020USD ($)Securityshares	Sep. 30, 2019USD ($)	Jun. 30, 2020USD ($)Securityshares
Investments Debt And Equity Securities [Abstract]
Sale of investment securities	$ 0	$ 0
Carrying amounts of securities pledged	164,100,000		$ 182,200,000
Total investment securities	$ 318,509,000		$ 313,198,000
Number of securities in unrealized loss position | Security	24
Fair value of securities in unrealized loss position	$ 58,400,000
Number of securities holding other than U.S. government and its agencies amount greater than 10% of shareholders equity | shares	0		0
Other-than-temporarily impaired securities | Security	0		0

Investment Securities - Fair Va

Investment Securities - Fair Value and Carrying Amount of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Investments Debt And Equity Securities [Abstract]
Held to maturity, carrying amount, 1 year or less	$ 11,037
Held to maturity, carrying amount, 1 to 5 years	32,165
Held to maturity, carrying amount, 5 to 10 years	38,716
Held to maturity, carrying amount, over 10 years	26,121
Held to maturity, carrying amount, Mortgage-backed securities and other	179,331
Held to maturity, Amortized Cost	287,370	$ 275,772
Held to maturity, fair value, 1 year or less	11,089
Held to maturity, fair value, 1 to 5 years	32,266
Held to maturity, fair value, 5 to 10 years	38,487
Held to maturity, fair value, over 10 years	25,894
Held to maturity, fair value, Mortgage-backed securities and other	186,074
Held to maturity, fair value, Total	293,810	281,497
Available for sale, amortized cost, 1 year or less	7,000
Available for sale, amortized cost, 1 to 5 years	5,031
Available for sale, amortized cost, Mortgage-backed securities and other	18,582
Available for sale, Amortized Cost	30,613	36,884
Available for sale, fair value, 1 year or less	7,018
Available for sale, fair value, 1 to 5 years	5,120
Available for sale, fair value, Mortgage-backed securities and other	19,001
Available for sale, fair value, Total	$ 31,139	$ 37,426

Investment Securities - Investm

Investment Securities - Investment Securities with Fair Value and Unrealized Losses (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Schedule of Investments [Line Items]
Available for sale, Less than 12 months, Fair Value	$ 662	$ 1,450
Available for sale, Less than 12 months, Unrealized/Unrecognized Loss	(9)	(15)
Available for sale, 12 months or greater, Fair Value	760
Available for sale, 12 months or greater, Unrealized/Unrecognized Loss	(4)
Available for sale, Total, Fair Value	1,422	1,450
Available for sale, Total, Unrealized/Unrecognized Loss	(13)	(15)
Held to maturity, Less than 12 months, Fair Value	40,008	50,503
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(758)	(1,108)
Held to maturity, 12 months or greater, Fair Value	16,972	12,045
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(528)	(455)
Held to maturity, Total, Fair Value	56,980	62,548
Held to maturity, Total, Unrealized/ Unrecognized Loss	(1,286)	(1,563)
U.S. Government and Agency Obligations [Member]
Schedule of Investments [Line Items]
Held to maturity, Less than 12 months, Fair Value	2,500	11,995
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(1)	(5)
Held to maturity, Total, Fair Value	2,500	11,995
Held to maturity, Total, Unrealized/ Unrecognized Loss	(1)	(5)
Mortgage-backed Securities - Residential [Member]
Schedule of Investments [Line Items]
Available for sale, Less than 12 months, Fair Value	662	1,450
Available for sale, Less than 12 months, Unrealized/Unrecognized Loss	(9)	(15)
Available for sale, 12 months or greater, Fair Value	760
Available for sale, 12 months or greater, Unrealized/Unrecognized Loss	(4)
Available for sale, Total, Fair Value	1,422	1,450
Available for sale, Total, Unrealized/Unrecognized Loss	(13)	(15)
Held to maturity, Less than 12 months, Fair Value	2,062	5,130
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(10)	(17)
Held to maturity, Total, Fair Value	2,062	5,130
Held to maturity, Total, Unrealized/ Unrecognized Loss	(10)	(17)
Corporate and Other Debt Securities [Member]
Schedule of Investments [Line Items]
Held to maturity, Less than 12 months, Fair Value	30,144	30,751
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(738)	(1,055)
Held to maturity, 12 months or greater, Fair Value	16,972	12,045
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(528)	(455)
Held to maturity, Total, Fair Value	47,116	42,796
Held to maturity, Total, Unrealized/ Unrecognized Loss	(1,266)	(1,510)
Mortgage-backed Securities - Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Held to maturity, Less than 12 months, Fair Value	5,302	2,627
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(9)	(31)
Held to maturity, Total, Fair Value	5,302	2,627
Held to maturity, Total, Unrealized/ Unrecognized Loss	$ (9)	$ (31)

Loans Receivable - Summary of L

Loans Receivable - Summary of Loans Receivable (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	$ 1,235,894	$ 1,268,117
Loans receivable	1,236,585	1,269,586
Allowance for loan losses	(8,672)	(8,639)	$ (5,993)	$ (5,664)
Loans receivable, net	1,227,913	1,260,947
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	245,008	255,382
Allowance for loan losses	(342)	(373)	(343)	(446)
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	794,248	807,106
Allowance for loan losses	(6,966)	(6,913)	(4,314)	(3,853)
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	11,512	11,053
Allowance for loan losses	(173)	(165)	(222)	(159)
Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	155,569	164,257
Allowance for loan losses	(1,121)	(1,124)	(1,041)	(1,130)
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	29,249	29,838
Allowance for loan losses	(63)	(60)	(61)	(65)
Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	308	481
Allowance for loan losses	(7)	(4)	$ (12)	$ (11)
Mortgage Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Net deferred loan origination costs	666	739
Loans receivable	1,051,434	1,074,280
Commercial and Consumer Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Net deferred loan origination costs	25	730
Loans receivable	$ 185,151	$ 195,306

Loans Receivable - Summary of A

Loans Receivable - Summary of Activity in Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	$ 8,639	$ 5,664
Allowance for Loan Losses, Provision (credit)	109	335
Allowance for Loan Losses, Charge-offs	(113)	(18)
Allowance for Loan Losses, Recoveries	37	12
Allowance for Loan Losses, Ending Allowance	8,672	5,993
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	373	446
Allowance for Loan Losses, Provision (credit)	(33)	(106)
Allowance for Loan Losses, Recoveries	2	3
Allowance for Loan Losses, Ending Allowance	342	343
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	6,913	3,853
Allowance for Loan Losses, Provision (credit)	53	461
Allowance for Loan Losses, Ending Allowance	6,966	4,314
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	165	159
Allowance for Loan Losses, Provision (credit)	8	63
Allowance for Loan Losses, Ending Allowance	173	222
Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	1,124	1,130
Allowance for Loan Losses, Provision (credit)	71	(89)
Allowance for Loan Losses, Charge-offs	(105)
Allowance for Loan Losses, Recoveries	31
Allowance for Loan Losses, Ending Allowance	1,121	1,041
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	60	65
Allowance for Loan Losses, Provision (credit)	1	(9)
Allowance for Loan Losses, Recoveries	2	5
Allowance for Loan Losses, Ending Allowance	63	61
Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	4	11
Allowance for Loan Losses, Provision (credit)	9	15
Allowance for Loan Losses, Charge-offs	(8)	(18)
Allowance for Loan Losses, Recoveries	2	4
Allowance for Loan Losses, Ending Allowance	$ 7	$ 12

Loans Receivable - Summary of B

Loans Receivable - Summary of Balance in Allowance for Loan Losses and Recorded investment in Loans by Portfolio Segment, and Based on Impairment Method (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	$ 4,609	$ 4,719
Loans, Collectively Evaluated for Impairment	1,229,533	1,261,638
Total	1,235,894	1,268,117
Allowance for Loan Losses, Individually Evaluated for Impairment	123	123
Allowance for Loan Losses, Collectively Evaluated for Impairment	8,549	8,516
Allowance for Loan Losses, Total	8,672	8,639	$ 5,993	$ 5,664
Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	1,752	1,760
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	0	0
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	2,440	2,448
Loans, Collectively Evaluated for Impairment	241,837	252,195
Total	245,008	255,382
Allowance for Loan Losses, Individually Evaluated for Impairment	115	118
Allowance for Loan Losses, Collectively Evaluated for Impairment	227	255
Allowance for Loan Losses, Total	342	373	343	446
Residential [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	731	739
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	0
Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Collectively Evaluated for Impairment	793,362	806,224
Total	794,248	807,106
Allowance for Loan Losses, Collectively Evaluated for Impairment	6,966	6,913
Allowance for Loan Losses, Total	6,966	6,913	4,314	3,853
Commercial [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	886	882
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	0	0
Construction [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Collectively Evaluated for Impairment	11,512	11,053
Total	11,512	11,053
Allowance for Loan Losses, Collectively Evaluated for Impairment	173	165
Allowance for Loan Losses, Total	173	165	222	159
Construction [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	0	0
Commercial Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	1,804	1,921
Loans, Collectively Evaluated for Impairment	153,765	162,336
Total	155,569	164,257
Allowance for Loan Losses, Individually Evaluated for Impairment		1
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,121	1,123
Allowance for Loan Losses, Total	1,121	1,124	1,041	1,130
Commercial Loans [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	0	0
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	365	350
Loans, Collectively Evaluated for Impairment	28,749	29,349
Total	29,249	29,838
Allowance for Loan Losses, Individually Evaluated for Impairment	8	4
Allowance for Loan Losses, Collectively Evaluated for Impairment	55	56
Allowance for Loan Losses, Total	63	60	61	65
Home Equity Lines Of Credit [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	135	139
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	0	0
Consumer and Overdrafts [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Collectively Evaluated for Impairment	308	481
Total	308	481
Allowance for Loan Losses, Collectively Evaluated for Impairment	7	4
Allowance for Loan Losses, Total	$ 7	$ 4	$ 12	$ 11

Loans Receivable - Summary of_2

Loans Receivable - Summary of Loans Individually Evaluated for Impairment (Excluding Loans Acquired with Deteriorated Credit Quality) by Portfolio Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Financing Receivable Impaired [Line Items]
Impaired loans, unpaid principal balance	$ 4,812	$ 4,923
Impaired loans, recorded investment	4,609	4,719
Allowance for loan losses	123	123
Residential [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	2,114	2,123
Impaired loans with no related allowance recorded, recorded investment	2,007	2,013
Impaired loans with an allowance recorded, unpaid principal balance	370	372
Impaired loans with an allowance recorded, recorded investment	433	435
Impaired loans, recorded investment	2,440	2,448
Allowance for loan losses	115	118
Commercial Loans [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	1,960	2,067
Impaired loans with no related allowance recorded, recorded investment	1,789	1,897
Impaired loans with an allowance recorded, unpaid principal balance	15	24
Impaired loans with an allowance recorded, recorded investment	15	24
Impaired loans, recorded investment	1,804	1,921
Allowance for loan losses		1
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	326	326
Impaired loans with no related allowance recorded, recorded investment	338	339
Impaired loans with an allowance recorded, unpaid principal balance	27	11
Impaired loans with an allowance recorded, recorded investment	27	11
Impaired loans, recorded investment	365	350
Allowance for loan losses	$ 8	$ 4

Loans Receivable - Summary of_3

Loans Receivable - Summary of Average Recorded Investment and Interest Income Recognized on Loans Individually Evaluated for Impairment, by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable Impaired [Line Items]
Impaired loans average recorded investment	$ 4,628	$ 6,580
Impaired loans interest income recognized	60	72
Residential [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	2,015	1,735
Impaired loans with no related allowance recorded, interest income recognized	8	6
Impaired loans with an allowance recorded, average recorded investment	434	738
Impaired loans with an allowance recorded, interest income recognized	3	3
Commercial [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment		1,411
Impaired loans with no related allowance recorded, interest income recognized		12
Commercial Loans [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	1,809	1,825
Impaired loans with no related allowance recorded, interest income recognized	49	50
Impaired loans with an allowance recorded, average recorded investment	15	180
Impaired loans with an allowance recorded, interest income recognized		1
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	339	680
Impaired loans with an allowance recorded, average recorded investment	$ 16	$ 11

Loans Receivable - Nonaccrual L

Loans Receivable - Nonaccrual Loans and in Loans Past Due over 90 Days Still on Accrual Status by Portfolio Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 2,084	$ 1,795
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,454	1,457
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	247
Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 383	$ 338

Loans Receivable - Additional I

Loans Receivable - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)Loan	Sep. 30, 2019USD ($)Loan	Jun. 30, 2020USD ($)Loan
Loans and Leases Receivable Disclosure [Line Items]
Number of loans classified as troubled debt restructurings | Loan	14		14
Value of loans classified as troubled debt restructurings	$ 3,200,000		$ 3,300,000
Troubled debt restructuring with carrying amount	2,800,000		2,900,000
Specific reserves	124,000		123,000
Commitment to lend to customers in addition to outstanding loans classified as troubled debt restructurings	$ 10,000
Troubled debt restructurings, number of modified loans | Loan	0	0
Troubled debt restructurings for which there was a payment default | Loan	0	1
Increase (decrease) allowance for loan loss	$ 0	$ (83,000)
Loans receivable	1,236,585,000		1,269,586,000
Loans granted	1,233,856,000		1,266,348,000
COVID-19 Pandemic [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans granted	21,800,000		216,200,000
COVID-19 Pandemic [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans granted	11,900,000		211,000,000
COVID-19 Pandemic [Member] | Special Mention [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans granted	9,600,000		198,000,000
COVID-19 Pandemic [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans granted	$ 221,000,000		$ 4,900,000
Loan Payment Deferrals [Member] | COVID-19 Pandemic [Member]
Loans and Leases Receivable Disclosure [Line Items]
Number of loans | Loan	28		320
Loans receivable	$ 21,800,000		$ 216,200,000
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Troubled debt restructuring with carrying amount		370,000
Increase (decrease) allowance for loan loss		$ 0
Loans granted	$ 243,909,000		254,071,000
Residential Mortgage Loans and Home Equity Lines of Credit [Member] | Loan Payment Deferrals [Member] | COVID-19 Pandemic [Member]
Loans and Leases Receivable Disclosure [Line Items]
Number of loans | Loan	21
Loans receivable	$ 7,400,000
Commercial Mortgage and Commercial Loans [Member] | Loan Payment Deferrals [Member] | COVID-19 Pandemic [Member]
Loans and Leases Receivable Disclosure [Line Items]
Number of loans | Loan	20
Loans receivable	$ 26,000,000
90 Days or More Past Due [Member]
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans accounted for as purchased credit impaired loans	$ 383,000		$ 392,000

Loans Receivable - Aging of Rec

Loans Receivable - Aging of Recorded Investment in Past Due Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,038	$ 1,769
Current	1,233,856	1,266,348
Total	1,235,894	1,268,117
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	83	615
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	512	10
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,443	1,144
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,099	1,311
Current	243,909	254,071
Total	245,008	255,382
Residential [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		495
Residential [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	286	10
Residential [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	813	806
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	794,248	807,106
Total	794,248	807,106
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,512	11,053
Total	11,512	11,053
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	556	76
Current	155,013	164,181
Total	155,569	164,257
Commercial Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	83	76
Commercial Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	226
Commercial Loans [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	247
Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	383	382
Current	28,866	29,456
Total	29,249	29,838
Home Equity Lines Of Credit [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		44
Home Equity Lines Of Credit [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	383	338
Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	308	481
Total	$ 308	$ 481

Loans Receivable - Summary of R

Loans Receivable - Summary of Risk Category of Loans by Portfolio Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,235,894	$ 1,268,117
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,214,352	1,256,217
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,217	4,562
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,325	7,338
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	245,008	255,382
Residential [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	242,366	252,604
Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	563	687
Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,079	2,091
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	794,248	807,106
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	780,620	803,048
Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,742	3,176
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	886	882
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,512	11,053
Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,512	11,053
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	155,569	164,257
Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	151,189	160,137
Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	463	201
Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,917	3,919
Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	29,249	29,838
Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	28,357	28,894
Home Equity Lines Of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	449	498
Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	443	446
Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	308	481
Consumer and Overdrafts [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 308	$ 481

Loans Receivable - Schedule of

Loans Receivable - Schedule of Carrying Amount of Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	$ 1,227,913	$ 1,260,947
Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	1,752	1,760
Acquired with Deteriorated Credit Quality [Member] | Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	731	739
Acquired with Deteriorated Credit Quality [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	886	882
Acquired with Deteriorated Credit Quality [Member] | Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	$ 135	$ 139

Loans Receivable - Schedule o_2

Loans Receivable - Schedule of Carrying Amount of Purchased Credit Impaired Loans (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans, allowance	$ 0	$ 0

Loans Receivable - Summary of_4

Loans Receivable - Summary of Accretable Yield, or Income Expected to be Collected for Acquired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]
Beginning balance	$ 156	$ 192
Accretion income	(5)	(10)
Ending balance	$ 151	$ 182

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 273,713	$ 281,307
Total other comprehensive income	187	256
Ending Balance	273,679	281,522
Net Unrealized Gain (Loss) on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	428	(209)
Other comprehensive (loss) income before reclassifications	(16)	181
Less tax effect	3	(38)
Total other comprehensive income	(13)	143
Ending Balance	415	(66)
Unrealized Losses on Retirement Plans [Member] | Pension Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(6,605)	(4,631)
Amounts reclassified from accumulated other comprehensive income	240	133
Less tax effect	(51)	(29)
Total other comprehensive income	189	104
Ending Balance	(6,416)	(4,527)
Unrealized Losses on Retirement Plans [Member] | SERP Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(226)	(250)
Amounts reclassified from accumulated other comprehensive income	14	11
Less tax effect	(3)	(2)
Total other comprehensive income	11	9
Ending Balance	(215)	(241)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(6,403)	(5,090)
Other comprehensive (loss) income before reclassifications	(16)	181
Amounts reclassified from accumulated other comprehensive income	254	144
Less tax effect	(51)	(69)
Total other comprehensive income	187	256
Ending Balance	$ (6,216)	$ (4,834)

Post-Retirement Benefits - Addi

Post-Retirement Benefits - Additional Information (Detail) - USD ($)	Apr. 20, 2017	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Compensation And Retirement Disclosure [Abstract]
Effective date of freezing of the defined benefit pension plan		May 1, 2017
Defined benefit plan, contributions by employer		$ 0
ESOP shares	1,453,209	1,442,573		1,441,735
Stock price	$ 10
ESOP payable term	15 years
ESOP prime rate percentage		4.75%
ESOP borrowing		$ 11,600,000
Number of shares committed to be released per year through 2032		96,881
ESOP compensation		$ 301,000	$ 483,000

Post-Retirement Benefits - Sche

Post-Retirement Benefits - Schedule of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Employee Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 136	$ 180
Expected return on plan assets	(456)	(479)
Amortization of prior net loss	240	133
Net periodic cost (benefit)	(80)	(166)
Supplemental Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	90	79
Interest cost	24	31
Amortization of prior net loss	14	11
Net periodic cost (benefit)	$ 128	$ 121

Post-Retirement Benefits - Shar

Post-Retirement Benefits - Shares Held by ESOP (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Apr. 20, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Allocated to participants	352,463	327,206
Unearned	1,090,110	1,114,529
Total ESOP shares	1,442,573	1,441,735	1,453,209
Fair value of unearned shares	$ 13,158	$ 14,132

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value transfers between levels	$ 0	$ 0
Carrying amount of loans	1,227,913,000		$ 1,260,947,000
Remaining valuation allowance	8,672,000	5,993,000	8,639,000	$ 5,664,000
Net charge-offs	113,000	18,000
Net recoveries	37,000	12,000
Provision for loan losses	109,000	335,000
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of loans	475,000		547,000
Remaining valuation allowance	124,000		$ 123,000
Net charge-offs		0
Net recoveries	4,000
Provision for loan losses	$ 3,000	$ 6,000
Minimum [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.10
Maximum [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.20

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 39,233	$ 45,731
Total liabilities at fair value	8,094	8,305
Measured on a Recurring Basis [Member] | U.S. Government and Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	7,017	11,049
Measured on a Recurring Basis [Member] | Corporate and Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	5,121	5,120
Measured on a Recurring Basis [Member] | Mortgage-backed Securities - Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	19,001	21,257
Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	351	424
Impaired Loans [Member] | Residential Mortgages [Member] | Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	318	316
Impaired Loans [Member] | Commercial Loans [Member] | Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	15	100
Impaired Loans [Member] | Home Equity Lines Of Credit [Member] | Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	18	8
Derivatives – Interest Rate Contracts [Member] | Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	8,094	8,305
Total liabilities at fair value	8,094	8,305
Level 2 [Member] | Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	39,233	45,731
Total liabilities at fair value	8,094	8,305
Level 2 [Member] | Measured on a Recurring Basis [Member] | U.S. Government and Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	7,017	11,049
Level 2 [Member] | Measured on a Recurring Basis [Member] | Corporate and Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	5,121	5,120
Level 2 [Member] | Measured on a Recurring Basis [Member] | Mortgage-backed Securities - Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	19,001	21,257
Level 2 [Member] | Derivatives – Interest Rate Contracts [Member] | Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	8,094	8,305
Total liabilities at fair value	8,094	8,305
Level 3 [Member] | Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	351	424
Level 3 [Member] | Impaired Loans [Member] | Residential Mortgages [Member] | Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	318	316
Level 3 [Member] | Impaired Loans [Member] | Commercial Loans [Member] | Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	15	100
Level 3 [Member] | Impaired Loans [Member] | Home Equity Lines Of Credit [Member] | Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 18	$ 8

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Summary of Quantitative Information about Level 3 Fair Value Measurements for Selected Financial Instruments Measured at Fair Value on Non-recurring Basis (Detail) $ in Thousands	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)
Minimum [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.10
Maximum [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.20
Measured on a Non-Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 351	$ 424
Measured on a Non-Recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	351	424
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	318	316
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Residential [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	318	316
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Residential [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	318	316
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Commercial Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	15	100
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Commercial Loans [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	15	100
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Commercial Loans [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 15	100
Range or Rate Used	0.070
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Home Equity Lines Of Credit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 18	8
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Home Equity Lines Of Credit [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	18	8
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Home Equity Lines Of Credit [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 18	$ 8
Range or Rate Used		0.063
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Minimum [Member] | Residential [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.054	0.054
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Minimum [Member] | Commercial Loans [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used		0.068
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Minimum [Member] | Home Equity Lines Of Credit [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.033
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Maximum [Member] | Residential [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.063	0.063
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Maximum [Member] | Commercial Loans [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used		0.075
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Maximum [Member] | Home Equity Lines Of Credit [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.063

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Summary of Carrying Amounts and Estimated Fair Values of Bank's Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Financial assets:
Investment securities held to maturity	$ 293,810	$ 281,497
Investment securities available for sale	31,139	37,426
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	162,739	136,302
Investment securities held to maturity	287,370	275,772
Investment securities available for sale	31,139	37,426
Loans receivable, net	1,227,913	1,260,947
Accrued interest receivable	6,729	6,880
FHLB stock	6,307	6,308
Financial liabilities:
Mortgage escrow funds	6,420	10,123
Accrued interest payable	252	246
FHLB advances	106,056	106,089
Carrying Amount [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	8,094	8,305
Financial liabilities:
Derivative liabilities - interest rate contracts	8,094	8,305
Carrying Amount [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	935,001	926,989
Carrying Amount [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	442,011	446,246
Total [Member]
Financial assets:
Cash and cash equivalents	162,739	136,302
Investment securities held to maturity	293,810	281,497
Investment securities available for sale	31,139	37,426
Loans receivable, net	1,207,943	1,240,440
Accrued interest receivable	6,729	6,880
Financial liabilities:
Mortgage escrow funds	6,420	10,123
Accrued interest payable	252	246
FHLB advances	110,762	110,937
Total [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	8,094	8,305
Financial liabilities:
Derivative liabilities - interest rate contracts	8,094	8,305
Total [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	935,001	926,989
Total [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	451,034	456,109
Level 1 [Member]
Financial assets:
Cash and cash equivalents	162,739	136,302
Financial liabilities:
Mortgage escrow funds	6,420	10,123
Accrued interest payable	2	1
Level 1 [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	935,001	926,989
Level 2 [Member]
Financial assets:
Investment securities held to maturity	289,010	276,847
Investment securities available for sale	31,139	37,426
Accrued interest receivable	1,310	997
Financial liabilities:
Accrued interest payable	250	245
FHLB advances	110,762	110,937
Level 2 [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	8,094	8,305
Financial liabilities:
Derivative liabilities - interest rate contracts	8,094	8,305
Level 2 [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	451,034	456,109
Level 3 [Member]
Financial assets:
Investment securities held to maturity	4,800	4,650
Loans receivable, net	1,207,943	1,240,440
Accrued interest receivable	$ 5,419	$ 5,883

Regulatory Matters - Summary of

Regulatory Matters - Summary of Bank's Actual Capital Amounts and Ratios Compared to Required Ratios for Minimum Capital Adequacy and for Classification as Well Capitalized (Detail) - PCSB Bank [Member] $ in Thousands	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Leverage (Tier 1), Bank Actual Amount	$ 223,304	$ 220,310
Common Tier 1, Bank Actual Amount	223,304	220,310
Tier 1, Bank Actual Amount	223,304	220,310
Total, Bank Actual Amount	$ 231,976	$ 228,949
Leverage (Tier 1), Bank Actual Ratio	12.4	12.5
Common Tier 1, Bank Actual Ratio	17.6	17
Tier 1, Bank Actual Ratio	17.6	17
Total, Bank Actual Ratio	18.2	17
Leverage (Tier 1), For Capital Adequacy Purposes Amount	$ 72,002	$ 70,432
Common Tier 1, For Capital Adequacy Purposes Amount	57,228	58,389
Tier 1, For Capital Adequacy Purposes Amount	76,304	77,852
Total, For Capital Adequacy Purposes Amount	$ 101,738	$ 103,802
Leverage (Tier 1), For Capital Adequacy Purposes Ratio	4	4
Common Tier 1, For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1, For Capital Adequacy Purposes Ratio	6	6
Total, For Capital Adequacy Purposes Ratio	8	8
Leverage (Tier 1), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 90,003	$ 88,040
Common Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	82,662	84,339
Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	101,738	103,802
Total, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 127,173	$ 129,753
Leverage (Tier 1), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5	5
Common Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	8	8
Total, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10	10

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer percentage at beginning period	2.50%	2.50%
Minimum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer percentage required under regulatory	2.50%

Earnings Per Share ("EPS") - Sc

Earnings Per Share ("EPS") - Schedule of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income applicable to common stock	$ 2,728	$ 2,829
Average number of common shares outstanding	16,404,886	17,178,824
Less: Average unallocated ESOP shares	(1,102,048)	(1,199,062)
Average number of common shares outstanding used to calculate basic earnings per common share	15,302,838	15,979,762
Effect of equity-based awards	111	102,514
Average number of common shares outstanding used to calculate diluted earnings per common share	15,302,949	16,082,276
Earnings per common share:
Basic	$ 0.18	$ 0.18
Diluted	$ 0.18	$ 0.18

Earnings Per Share ("EPS") - Ad

Earnings Per Share ("EPS") - Additional Information (Detail) - shares	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,345,293	1,339,293

Derivatives and Hedging - Summa

Derivatives and Hedging - Summary Information About Interest Rate Swaps (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Notional amounts	$ 168,462,000	$ 159,242,000
Weighted average pay rates	2.53%	2.54%
Weighted average receive rates	2.53%	2.54%
Weighted average maturity	9 years 1 month 6 days	9 years 3 months 21 days

Revenue From Contracts With C_3

Revenue From Contracts With Customers - Summary of Sources of Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands		3 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Noninterest income
Service charges on deposits		$ 162	$ 256
Interchange fees		131	117
Other	[1]	29	29
Fees and service charges		322	402
Bank-owned life insurance	[1]	132	137
Swap income	[1]	129	170
Net gain on sale of foreclosed real estate			47
Other	[1]	11	9
Other noninterest income		11	56
Total noninterest income		$ 594	$ 765
[1]	Not within the scope of ASC 606.

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Oct. 24, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 829,000	$ 830,000
Number of other than stock options granted	3,000
Number of shares granted	6,000
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 3,800,000
Expected weighted-average period for cost recognition	3 years 2 months 12 days
Restricted Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 6,500,000
Expected weighted-average period for cost recognition	3 years 2 months 12 days
2018 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for issuance			2,543,115
Stock-based compensation	$ 829,000	$ 830,000
2018 Equity Incentive Plan [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for issuance	1,816,511		1,816,511
Contractual term	10 years
Number of shares granted	1,345,293
2018 Equity Incentive Plan [Member] | Stock Options [Member] | Annual Vesting on Each Anniversary [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting percentage for year	20.00%
2018 Equity Incentive Plan [Member] | Stock Options [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years
2018 Equity Incentive Plan [Member] | Stock Options [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
2018 Equity Incentive Plan [Member] | Restricted Stock and Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for issuance			726,604
2018 Equity Incentive Plan [Member] | Restricted Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of other than stock options granted	550,185
Number of shares available for grant	726,604
2018 Equity Incentive Plan [Member] | Restricted Stock Awards [Member] | Annual Vesting on Each Anniversary [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting percentage for year	20.00%
2018 Equity Incentive Plan [Member] | Restricted Stock Awards [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of RSA activity (Detail)	3 Months Ended
	Sep. 30, 2020$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Unvested granted shares outstanding beginning balance | shares	437,737
Number of Shares, granted | shares	3,000
Number of Shares, Unvested granted shares outstanding ending balance | shares	440,737
Weighted-Average Grant Date Fair Value, Unvested granted shares outstanding beginning balance | $ / shares	$ 19.02
Weighted-Average Grant Date Fair Value, Shares granted | $ / shares	12.34
Weighted-Average Grant Date Fair Value, Unvested granted shares outstanding ending balance | $ / shares	$ 18.97

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Fair Value of Options Granted Using Weighted-Average Assumptions as of Grant Date (Detail) - Stock Options [Member]	3 Months Ended
	Sep. 30, 2020$ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	0.39%
Expected term (in years)	6 years 3 months
Expected stock price volatility	35.75%
Dividend yield	1.30%
Weighted average fair value of options granted	$ 3.72

Share-Based Compensation - Su_2

Share-Based Compensation - Summary of Activity Related to Stock Options Granted under Plan (Detail)	3 Months Ended
	Sep. 30, 2020$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options, outstanding beginning balance | shares	1,339,293
Number of Options, granted | shares	6,000
Number of Options, outstanding ending balance | shares	1,345,293
Number of Option, Exercisable at September 30, 2020 | shares	267,859
Weighted-Average Exercise Price, Option outstanding beginning balance | $ / shares	$ 19.04
Weighted-Average Exercise Price, Option granted | $ / shares	12.34
Weighted-Average Exercise Price, Option outstanding ending balance | $ / shares	19.01
Weighted-Average Excercise Price, Exercisable at September 30, 2020 | $ / shares	$ 19.04
Weighted-Average Remaining Contractual Years, Option outstanding	8 years 1 month 6 days
Weighted-Average Remaining Contractual Years, Option Exercisable	8 years 1 month 6 days

Leases - Additional Information

Leases - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2020USD ($)BranchOfficeAdministrativeOffice	Sep. 30, 2019USD ($)
Lessee Lease Description [Line Items]
Number of branch offices in real estate lease | BranchOffice	11
Number of administrative office in real estate lease | AdministrativeOffice	1
Lease maturity start year	2021
Lease maturity end year	2041
Lease option to extend	some of which include lessee options to extend the lease term.
Operating lease, weighted average remaining lease terms	9 years 10 months 24 days
Lessee, operating lease, description	The operating lease asset and lease liability are determined at the commencement date of the lease based on the present value of the lease payments.
Operating lease, weighted average discount rate, percent	2.43%
Short-term lease cost	$ 0	$ 0
Sale and leaseback transactions with related parties	0	0
Operating lease, right-of-use asset	$ 10,600,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Operating lease, liability	$ 10,791,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities
Occupancy and Equipment Expense [Member]
Lessee Lease Description [Line Items]
Operating lease, cost	$ 504,000	$ 497,000
Maximum [Member]
Lessee Lease Description [Line Items]
Lessee, operating lease, original term	12 months

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments (Detail) $ in Thousands	Sep. 30, 2020USD ($)
Leases [Abstract]
2021	$ 1,486
2022	1,937
2023	1,850
2024	1,479
2025	1,186
Thereafter	4,475
Total future minimum lease payments (undiscounted)	12,413
Discounting effect on cash flows	(1,622)
Lease liability (discounted)	$ 10,791
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Common Stock [Member] - $ / shares	1 Months Ended	3 Months Ended
	Nov. 04, 2020	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Number of shares repurchased		266,900	179,800
Subsequent Event [Member]
Subsequent Event [Line Items]
Number of shares repurchased	216,500
Average cost per share	$ 13.18