PCSB Financial (PCSB) 10-Q 10 May 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Mar. 31, 2019	May 10, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	PCSB
Entity Registrant Name	PCSB Financial Corp
Entity Central Index Key	0001691337
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		17,804,039

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
ASSETS
Cash and due from banks	$ 85,875	$ 60,684
Federal funds sold	1,230	1,461
Total cash and cash equivalents	87,105	62,145
Held to maturity debt securities, at amortized cost (fair value of $351,184 and $343,188, respectively)	354,000	353,183
Available for sale debt securities, at fair value	86,014	105,472
Total investment securities	440,014	458,655
Loans receivable, net of allowance for loan losses of $4,945 and $4,904, respectively	935,680	902,336
Accrued interest receivable	5,037	4,358
Federal Home Loan Bank stock	2,384	2,050
Premises and equipment, net	11,497	11,598
Deferred tax asset, net	2,372	2,622
Foreclosed real estate	653	460
Bank-owned life insurance	24,157	23,747
Goodwill	6,106	6,106
Other intangible assets	348	433
Other assets	8,405	5,677
Total assets	1,523,758	1,480,187
LIABILITIES AND SHAREHOLDERS' EQUITY
Interest bearing deposits	1,064,294	1,025,574
Non-interest bearing deposits	137,899	131,883
Total deposits	1,202,193	1,157,457
Mortgage escrow funds	7,675	8,803
Advances from Federal Home Loan Bank	26,248	18,841
Other liabilities	9,326	7,527
Total liabilities	1,245,442	1,192,628
Commitments and contingencies
Preferred stock ($0.01 par value, 10,000,000 shares authorized, no shares issued or outstanding as of March 31, 2019 and June 30, 2018)
Common stock ($0.01 par value, 200,000,000 shares authorized, 18,712,295 and 18,165,110 shares issued, and 17,804,039 and 18,165,110 shares outstanding as of March 31, 2019 and June 30, 2018, respectively)	187	182
Additional paid in capital	181,066	179,045
Retained earnings	133,483	128,365
Unearned compensation - ESOP	(12,364)	(13,083)
Accumulated other comprehensive loss, net of income taxes	(5,751)	(6,950)
Treasury stock, at cost (908,256 shares as of March 31, 2019 and no shares as of June 30, 2018)	(18,305)
Total shareholders' equity	278,316	287,559
Total liabilities and shareholders' equity	$ 1,523,758	$ 1,480,187

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Statement Of Financial Position [Abstract]
Held to maturity investment securities, fair value	$ 351,184	$ 343,188
Allowance for loan losses	$ 4,945	$ 4,904
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	18,165,110
Common Stock, shares outstanding	17,804,039	18,165,110
Treasury Stock, Shares	908,256	0

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Interest and dividend income
Loans receivable	$ 10,413,000	$ 9,103,000	$ 30,632,000	$ 27,092,000
Investment securities	2,619,000	2,368,000	7,413,000	6,882,000
Federal funds and other	614,000	177,000	1,450,000	628,000
Total interest and dividend income	13,646,000	11,648,000	39,495,000	34,602,000
Interest expense
Deposits	2,741,000	1,380,000	7,172,000	3,954,000
FHLB advances	168,000	125,000	378,000	443,000
Total interest expense	2,909,000	1,505,000	7,550,000	4,397,000
Net interest income	10,737,000	10,143,000	31,945,000	30,205,000
Provision for loan losses	7,000	54,000	71,000	389,000
Net interest income after provision for loan losses	10,730,000	10,089,000	31,874,000	29,816,000
Noninterest income
Fees and service charges	436,000	352,000	1,311,000	1,145,000
Bank-owned life insurance	131,000	136,000	410,000	430,000
Gain on sale of securities, net			55,000	173,000
Other	12,000	24,000	364,000	170,000
Total noninterest income	579,000	512,000	2,140,000	1,918,000
Noninterest expense
Salaries and employee benefits	5,757,000	4,800,000	16,341,000	14,530,000
Occupancy and equipment	1,340,000	1,326,000	3,865,000	3,904,000
Communicating and data processing	476,000	477,000	1,430,000	1,447,000
Professional fees	396,000	465,000	1,182,000	1,257,000
Postage, printing, stationary and supplies	138,000	161,000	454,000	435,000
FDIC assessment	105,000	93,000	322,000	235,000
Advertising	131,000	112,000	349,000	456,000
Amortization of intangible assets	29,000	32,000	85,000	97,000
Other operating expenses	326,000	367,000	1,258,000	1,491,000
Total noninterest expense	8,698,000	7,833,000	25,286,000	23,852,000
Net income before income tax expense	2,611,000	2,768,000	8,728,000	7,882,000
Income tax expense	625,000	591,000	2,089,000	3,947,000
Net income	$ 1,986,000	$ 2,177,000	$ 6,639,000	$ 3,935,000
Earnings per common share:
Basic	$ 0.12	$ 0.13	$ 0.40	$ 0.23
Diluted	$ 0.12	$ 0.13	$ 0.40	$ 0.23
Weighted average common shares:
Basic	16,204,393	16,820,726	16,645,287	16,789,131
Diluted	16,261,755	16,820,726	16,659,746	16,789,131

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Net income	$ 1,986	$ 2,177	$ 6,639	$ 3,935
Unrealized gains (losses) on available for sale debt securities:
Net change in unrealized gains/losses before reclassification adjustment	757	(705)	1,110	(1,635)
Reclassification adjustment for gains realized in net income			(55)	(139)
Net change in unrealized gains/losses	757	(705)	1,055	(1,774)
Tax effect	(160)	149	(222)	512
Net of tax	597	(556)	833	(1,262)
Defined benefit pension plan and supplemental retirement plans:
Total other comprehensive income (loss)	720	(406)	1,199	(861)
Comprehensive income	2,706	1,771	7,838	3,074
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	145	182	435	544
Tax effect	(30)	(39)	(91)	(162)
Net of tax	115	143	344	382
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	9	10	27	26
Tax effect	(1)	(3)	(5)	(7)
Net of tax	$ 8	$ 7	$ 22	$ 19

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, 2017		$ 279,846	$ 182	$ 177,993	$ 121,148	$ (14,262)		$ (5,215)
Begining Balance (in shares) at Jun. 30, 2017			18,165,110
Net income		1,756			1,756
Other comprehensive income (loss)		(107)						(107)
Issuance of common stock	[1]	(17)		(17)
ESOP shares committed to be released		607		258		349
Ending Balance at Sep. 30, 2017		282,085	$ 182	178,234	122,904	(13,913)		(5,322)
Ending Balance (in shares) at Sep. 30, 2017			18,165,110
Beginning Balance at Jun. 30, 2017		279,846	$ 182	177,993	121,148	(14,262)		(5,215)
Begining Balance (in shares) at Jun. 30, 2017			18,165,110
Net income		3,935
Other comprehensive income (loss)		(861)						(861)
Reclassification of certain tax effects on other comprehensive income	[2]							(1,117)
Ending Balance at Mar. 31, 2018		284,660	$ 182	178,795	126,200	(13,324)		(7,193)
Ending Balance (in shares) at Mar. 31, 2018			18,165,110
Beginning Balance at Sep. 30, 2017		282,085	$ 182	178,234	122,904	(13,913)		(5,322)
Begining Balance (in shares) at Sep. 30, 2017			18,165,110
Net income		2			2
Other comprehensive income (loss)		(348)						(348)
ESOP shares committed to be released		672		322		350
Ending Balance at Dec. 31, 2017		282,411	$ 182	178,556	122,906	(13,563)		(5,670)
Ending Balance (in shares) at Dec. 31, 2017			18,165,110
Net income		2,177			2,177
Other comprehensive income (loss)		(406)						(406)
Reclassification of certain tax effects on other comprehensive income	[3]				1,117			(1,117)	[2]
ESOP shares committed to be released		478		239		239
Ending Balance at Mar. 31, 2018		284,660	$ 182	178,795	126,200	(13,324)		(7,193)
Ending Balance (in shares) at Mar. 31, 2018			18,165,110
Beginning Balance at Jun. 30, 2018		287,559	$ 182	179,045	128,365	(13,083)		(6,950)
Begining Balance (in shares) at Jun. 30, 2018			18,165,110
Net income		2,329			2,329
Other comprehensive income (loss)		1						1
Common stock dividends declared		(505)			(505)
ESOP shares committed to be released		493		249		244
Ending Balance at Sep. 30, 2018		289,877	$ 182	179,294	130,189	(12,839)		(6,949)
Ending Balance (in shares) at Sep. 30, 2018			18,165,110
Beginning Balance at Jun. 30, 2018		287,559	$ 182	179,045	128,365	(13,083)		(6,950)
Begining Balance (in shares) at Jun. 30, 2018			18,165,110
Net income		6,639
Other comprehensive income (loss)		1,199						1,199
Ending Balance at Mar. 31, 2019		278,316	$ 187	181,066	133,483	(12,364)	$ (18,305)	(5,751)
Ending Balance (in shares) at Mar. 31, 2019			17,804,039
Beginning Balance at Sep. 30, 2018		289,877	$ 182	179,294	130,189	(12,839)		(6,949)
Begining Balance (in shares) at Sep. 30, 2018			18,165,110
Net income		2,324			2,324
Other comprehensive income (loss)		478						478
Common stock dividends declared		(520)			(520)
Repurchase of common stock		(4,336)					(4,336)
Repurchase of common stock (in shares)			(222,070)
Restricted stock awards granted			$ 5	(5)
Restricted stock awards granted (in shares)			547,185
Stock-based compensation		482		482
ESOP shares committed to be released		477		232		245
Ending Balance at Dec. 31, 2018		288,782	$ 187	180,003	131,993	(12,594)	(4,336)	(6,471)
Ending Balance (in shares) at Dec. 31, 2018			18,490,225
Net income		1,986			1,986
Other comprehensive income (loss)		720						720
Common stock dividends declared		(496)			(496)
Repurchase of common stock		(13,969)					(13,969)
Repurchase of common stock (in shares)			(686,186)
Stock-based compensation		829		829
ESOP shares committed to be released		464		234		230
Ending Balance at Mar. 31, 2019		$ 278,316	$ 187	$ 181,066	$ 133,483	$ (12,364)	$ (18,305)	$ (5,751)
Ending Balance (in shares) at Mar. 31, 2019			17,804,039
[1]	Represents costs incurred in association with the Company's initial public offering.
[2]	Represents the impact of adopting ASU 2018-02 requiring the reclassification of certain stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017 from accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 (or portion thereof) is recorded. The amount of the reclassification is the difference between the historical corporate income tax rate (34 percent) and the newly enacted 21 percent corporate income tax rate. The reclassification is as of March 31, 2018; no prior period information has been retroactively adjusted as a result of implementing the ASU.
[3]	The adoption of ASU 2018-02 requires the reclassification from accumulated income to retained earnings of stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017
Statement Of Stockholders Equity [Abstract]
Common stock dividends declared (per share)	$ 0.03	$ 0.03	$ 0.03
ESOP shares committed to be released (in shares)	23,092	24,419	24,419	23,888	34,953	34,953

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net income	$ 6,639,000	$ 3,935,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan loss	71,000	389,000
Depreciation and amortization	877,000	1,110,000
Amortization of net premiums on securities and net deferred loan origination costs	1,055,000	1,293,000
Net increase in accrued interest receivable	(679,000)	(765,000)
Net (gain) loss on sale of foreclosed real estate	(24,000)	7,000
Net gains on sales of securities	(55,000)	(173,000)
Net (gain) loss on sales of real estate	(156,000)	13,000
Write-down on other real estate owned	21,000
Stock-based compensation	1,311,000
ESOP Compensation	1,434,000	1,757,000
Earnings from cash surrender value of BOLI	(410,000)	(430,000)
Net accretion of purchase account adjustments	(276,000)	(464,000)
Other adjustments, principally net changes in other assets and liabilities	(535,000)	2,928,000
Net cash provided by operating activities	9,273,000	9,600,000
Purchases of investment securities:
Held to maturity	(49,220,000)	(43,055,000)
Available for sale		(23,537,000)
Sales of investment securities available for sale	2,069,000	6,100,000
Maturities and calls of investment securities:
Held to maturity	47,968,000	59,772,000
Available for sale	18,314,000	20,107,000
Principal (disbursements) repayments, net	(20,789,000)	10,724,000
Purchase of loans	(13,398,000)	(88,605,000)
Net purchases of FHLB stock	(334,000)	(980,000)
Purchases of bank premises and equipment, net of sales	(535,000)	(577,000)
Proceeds from sale of foreclosed real estate	487,000	1,160,000
Net cash used in investing activities	(15,438,000)	(58,891,000)
FINANCING ACTIVITIES
Net increase (decrease) in deposits	44,672,000	(459,000)
Net increase in short-term FHLB advances		26,364,000
Proceeds from long-term FHLB advances	12,500,000
Repayment of long-term FHLB advances	(5,093,000)	(90,000)
Net decrease in mortgage escrow funds	(1,128,000)	(488,000)
Common stock dividends paid	(1,521,000)
Issuance of common stock		(17,000)
Repurchase of common stock	(18,305,000)
Net cash provided by financing activities	31,125,000	25,310,000
Net increase (decrease) in cash and cash equivalents	24,960,000	(23,981,000)
Cash and cash equivalents at beginning of period	62,145,000	60,486,000
Cash and cash equivalents at end of period	87,105,000	36,505,000
Cash paid for:
Interest	7,491,000	4,354,000
Income taxes	1,718,000	2,066,000
Loans transferred to foreclosed real estate	$ 677,000	$ 345,000

Basis of Presentation

Basis of Presentation	9 Months Ended
	Mar. 31, 2019
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 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 the 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, 2018, 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. Use of Estimates

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Mar. 31, 2019
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. Accounting Standards Adopted in the Period In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09 “Revenue from Contracts with Customers,” and was later amended by ASU 2015-14, ASU 2016-08, ASU 2016-10, ASU 2016-12 and 2016-20. These updates provide a comprehensive framework for addressing revenue recognition issues that can be applied to all contracts with customers. The amendments also include improved disclosures to enable users of financial statements to better understand the nature, amount, timing and uncertainty of revenue that is recognized. While the guidance in ASU 2014-09 supersedes most existing industry-specific revenue recognition accounting guidance, much of the Company’s revenue comes from financial instruments such as debt securities and loans that are outside the scope of the guidance. The Company’s material revenue streams that are in the scope of ASU 2014-09 are fees on deposit accounts (including interchange fees) and foreclosed real estate gains and losses. All other revenue streams are immaterial or are in the scope of other GAAP requirements which take precedence and therefore are not in the scope of ASU 2014-09. Based on the Company’s analysis, ASU 2014-09 will not materially change the recognition of revenue on service fees on deposit accounts as the contracts are day to day and recognized as the service is provided. Gains and losses on the sale of foreclosed real estate are generally accounted for under ASC 610. However, ASU 2014-09 also added a new Subtopic 610-20 which addresses the recognition of gains and losses on the transfer of nonfinancial and in-substance nonfinancial assets. Gain and loss recognition is not expected to change except for foreclosed real estate and other nonfinancial asset sales that are financed by the Company. In the case of financed sales, the Company will need to evaluate each contract to determine whether each contract criteria are met, including whether it is probable that it will collect substantially all consideration to which it is entitled. The Company will also need to evaluate whether the financing terms offered to the buyer of the nonfinancial asset are market terms when determining the transaction price. The Company has evaluated the impact of ASU 2014-09 and the amendments upon adoption as of July 1, 2018. In evaluating this standard, management has determined that the majority of revenue earned by the Company is from revenue streams not included in the scope of this standard and for in scope revenue streams management determined that, based on the modified retrospective method, a cumulative-effect adjustment to opening retained earnings as a result of adopting this standard is not needed. Additional disclosures required under ASU 2014-09 are contained in Note 11. In January 2016, the FASB issued ASU 2016-01, an amendment to “Recognition and Measurement of Financial Assets and Financial Liabilities.” The amendments in ASU 2016-01 are intended to improve the recognition, measurement, presentation and disclosure of financial assets and liabilities to provide users of financial statements with information that is more useful for decision-making purposes. Among other changes, ASU 2016-01 would: (1) require equity securities to be reclassified out of available for sale and measured at fair value with changes in fair value recognized through net income but would allow equity securities that do not have readily determinable fair values to be re-measured at fair value either upon the occurrence of an observable price change or upon identification of an impairment, (2) simplify the impairment assessment of such equity securities and would require enhanced disclosure about these investments, (3) require separate presentation of financial assets and liabilities by measurement category and type of instrument, such as securities or loans, on the balance sheet or in the notes, and would eliminate certain other disclosures relating to the methods and assumptions used to estimate fair value for financial assets measured at amortized cost on the balance sheet, and (4) require the use of an exit price notion when measuring the fair value of financial instruments. The adoption of ASU 2016-01, and subsequent amendments, on July 1, 2018 did not have a material impact on the Company’s consolidated financial statements. In March 2017, the FASB issued ASU 2017-07 “Compensation – Retirement Benefits”. The ASU requires companies that offer employee defined pension plans, other postretirement benefit plans, or other types of benefit plans accounted for under Topic 715 to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The adoption of ASU 2017-07 resulted in credits to non-service cost of $73,000 and $239,000, and $45,000 and $139,000 to be included in other operating expense for the three and nine months ended March 31, 2019 and 2018, respectively. Future Application of Accounting Pronouncements Previously Issued In February 2016, the FASB issued ASU 2016-02 “Leases.” ASU 2016-02 affects any entity that enters into a lease and is intended to increase the transparency and comparability of financial statements among organizations. The ASU requires, among other changes, a lessee to recognize on its balance sheet a lease asset and a lease liability for those leases previously classified as operating leases. The lease asset would represent the right to use the underlying asset for the lease term and the lease liability would represent the discounted value of the required lease payments to the lessor. The ASU would also require entities to disclose key information about leasing arrangements. The amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2019, including interim periods within that fiscal year. The Company currently leases eleven branches and two administrative offices. ASU 2016-02 will result in the establishment of a right to use asset and corresponding lease obligation. The impact to the Company’s consolidated financial position has yet to be determined by management, however the ASU is not expected to have a material impact on the Company’s consolidated results of operations or disclosures. 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. The amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2020, including interim periods within that fiscal year. Early adoption is permitted beginning after December 15, 2018, including interim periods within those fiscal years. 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 is evaluating the need for a third-party software service provider to assist in the Company's implementation. In January 2017, the FASB issued ASU 2017-04 “Intangibles – Goodwill and Other (Topic 350).” In March 2017, the FASB issued ASU 2017-08 "Receivables - Non-Refundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." The ASU requires premiums on callable debt securities to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2020, including interim periods within that fiscal year. Early adoption is permitted beginning after December 15, 2018, including interim periods within those fiscal years. ASU 2017-08 will not have a material impact on the Company’s consolidated financial position, results of operations or disclosures.

Investment Securities

Investment Securities	9 Months Ended
	Mar. 31, 2019
Investments Debt And Equity Securities [Abstract]
Investment Securities	Note 3. Investment Securities In association with the adoption of ASU 2016-01, available-for-sale and held-to-maturity debt securities are referred to as 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 March 31, 2019 and June 30, 2018 were as follows: March 31, 2019 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 49,977 $ 36 $ (401 ) $ 49,612 Corporate and other debt securities 8,364 - (48 ) 8,316 Mortgage-backed securities – residential 28,560 9 (483 ) 28,086 Total available for sale $ 86,901 $ 45 $ (932 ) $ 86,014 Held to maturity: U.S. Government and agency obligations $ 106,544 $ 84 $ (882 ) $ 105,746 Corporate and other debt securities 34,035 229 (122 ) 34,142 Mortgage-backed securities – residential 135,352 225 (1,647 ) 133,930 Mortgage-backed securities – collateralized mortgage obligations 49,538 54 (698 ) 48,894 Mortgage-backed securities – commercial 28,531 139 (198 ) 28,472 Total held to maturity $ 354,000 $ 731 $ (3,547 ) $ 351,184 June 30, 2018 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 64,389 $ - $ (959 ) $ 63,430 Corporate and other debt securities 8,406 - (171 ) 8,235 Mortgage-backed securities – residential 34,619 81 (893 ) 33,807 Total available for sale $ 107,414 $ 81 $ (2,023 ) $ 105,472 Held to maturity: U.S. Government and agency obligations $ 122,048 $ - $ (2,274 ) $ 119,774 Corporate and other debt securities 4,000 - (126 ) 3,874 Mortgage-backed securities – residential 140,478 32 (4,846 ) 135,664 Mortgage-backed securities – collateralized mortgage obligations 53,547 - (1,815 ) 51,732 Mortgage-backed securities – commercial 33,110 11 (977 ) 32,144 Total held to maturity $ 353,183 $ 43 $ (10,038 ) $ 343,188 No securities were sold during the three months ended March 31, 2019 and March 31, 2018, respectively. During the nine months ended March 31, 2019, $2.1 million of securities were sold resulting in $55,000 of net realized gains. During the nine months ended March 31, 2018, $6.6 million of securities were sold resulting in $173,000 of net realized gains. Included in the net realized gain for the nine months ended March 31, 2018, was a disposal of $681,000 of securities classified as held to maturity, resulting in net realized gains of $34,000. These securities were comprised of seasoned mortgage-backed securities where the Company collected a substantial portion (at least 85%) of the principal outstanding at acquisition due to prepayments or scheduled payments payable in equal installments, comprising both principal and interest, over the terms. The following table presents the fair value and carrying amount of debt securities at March 31, 2019, by contractual maturity. 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 (in thousands) March 31, 2019: 1 year or less $ 27,550 $ 27,389 $ 18,007 $ 17,907 1 to 5 years 83,994 83,419 40,334 40,021 5 to 10 years 25,035 25,155 - - Mortgage-backed securities and other 217,421 215,221 28,560 28,086 Total $ 354,000 $ 351,184 $ 86,901 $ 86,014 Securities pledged had carrying amounts of $112.2 million and $140.5 million at March 31, 2019 and June 30, 2018, 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 March 31, 2019 and June 30, 2018 March 31, 2019 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: U.S. Government and agency obligations $ - $ - $ 44,657 $ (401 ) $ 44,657 $ (401 ) Corporate and other debt securities - - 8,316 (48 ) 8,316 (48 ) Mortgage-backed securities – residential - - 25,806 (483 ) 25,806 (483 ) Total available for sale $ - $ - $ 78,779 $ (932 ) $ 78,779 $ (932 ) Held to maturity: U.S. Government and agency obligations $ - $ - $ 95,669 $ (882 ) 95,669 $ (882 ) Corporate and other debt securities 2,453 (47 ) 3,925 (75 ) 6,378 (122 ) Mortgage-backed securities – residential - - 111,881 (1,647 ) 111,881 (1,647 ) Mortgage-backed securities – collateralized mortgage obligations - - 40,744 (698 ) 40,744 (698 ) Mortgage-backed securities – commercial - - 18,099 (198 ) 18,099 (198 ) Total held to maturity $ 2,453 $ (47 ) $ 270,318 $ (3,500 ) $ 272,771 $ (3,547 ) June 30, 2018 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 U.S. Government and agency obligations $ 41,762 $ (569 ) $ 21,668 $ (390 ) $ 63,430 $ (959 ) Corporate and other debt securities 6,258 (148 ) 1,977 (23 ) 8,235 (171 ) Mortgage-backed securities – residential 13,397 (379 ) 14,718 (514 ) 28,115 (893 ) Total available for sale $ 61,417 $ (1,096 ) $ 38,363 $ (927 ) $ 99,780 $ (2,023 ) Held to maturity U.S. Government and agency obligations $ 46,163 $ (871 ) $ 71,611 $ (1,403 ) $ 117,774 $ (2,274 ) Corporate and other debt securities 3,874 (126 ) - - 3,874 (126 ) Mortgage-backed securities – residential 102,496 (3,338 ) 32,490 (1,508 ) 134,986 (4,846 ) Mortgage-backed securities – collateralized mortgage obligations 31,124 (884 ) 20,608 (931 ) 51,732 (1,815 ) Mortgage-backed securities – commercial 21,762 (582 ) 8,629 (395 ) 30,391 (977 ) Total held to maturity $ 205,419 $ (5,801 ) $ 133,338 $ (4,237 ) $ 338,757 $ (10,038 ) As of March 31, 2019, the Company’s securities portfolio consisted of $440.0 million in securities, of which 205 securities with a fair value of $351.6 million were in an unrealized loss position. As of June 30, 2018, the Company’s securities portfolio consisted of $458.7 million in securities, of which 254 securities with a fair value of $438.5 million were in an unrealized loss There were no securities as of March 31, 2019 or June 30, 2018 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. 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 March 31, 2019 or June 30, 2018.

Loans Receivable

Loans Receivable	9 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Loans Receivable	Note 4. Loans Receivable Loans receivable are summarized as follows (in thousands): March 31, June 30, 2019 2018 Mortgage loans: Residential $ 261,970 $ 250,578 Commercial 499,284 495,265 Construction 16,302 17,352 Net deferred loan origination costs 843 1,041 Total mortgage loans 778,399 764,236 Commercial and consumer loans: Commercial loans 126,514 104,135 Home equity lines of credit 34,525 37,395 Consumer and overdrafts 459 745 Net deferred loan origination costs 728 729 Total commercial and consumer loans 162,226 143,004 Total loans receivable 940,625 907,240 Allowance for loan losses (4,945 ) (4,904 ) Loans receivable, net $ 935,680 $ 902,336 In 2015, the Company completed a merger with CMS Bancorp and its wholly owned subsidiary, CMS Bank. References to acquired loans in this note pertain only to those loans acquired as part of the merger. The following tables present the activity in the allowance for loan losses by portfolio segment for the three and nine months ended March 31, 2019 and 2018 (in thousands): Three Months Ended March 31, 2019 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 379 $ 8 $ - $ 2 $ 389 Commercial 3,261 (26 ) - - 3,235 Construction 258 (58 ) - - 200 Commercial loans 880 69 - 2 951 Home equity lines of credit 82 (8 ) - - 74 Consumer and overdrafts 10 6 (11 ) 2 7 Acquired: Residential 73 16 - - 89 Total $ 4,943 $ 7 $ (11 ) $ 6 $ 4,945 Three Months Ended March 31, 2018 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 402 $ (20 ) $ (47 ) $ - $ 335 Commercial 2,686 131 - - 2,817 Construction 400 90 - - 490 Commercial loans 844 (186 ) (23 ) 210 845 Home equity lines of credit 74 35 (60 ) 19 68 Consumer and overdrafts - 4 - - 4 Acquired: Residential 65 - - - 65 Total $ 4,471 $ 54 $ (130 ) $ 229 $ 4,624 Nine Months Ended March 31, 2019 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 386 $ (4 ) $ - $ 7 $ 389 Commercial 3,073 276 (114 ) - 3,235 Construction 505 (401 ) - 96 200 Commercial loans 780 169 - 2 951 Home equity lines of credit 80 (6 ) - - 74 Consumer and installment loans 7 21 (27 ) 6 7 Acquired: Residential 73 16 - - 89 Total $ 4,904 $ 71 $ (141 ) $ 111 $ 4,945 Nine Months Ended March 31, 2018 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 360 $ 39 $ (64 ) $ - $ 335 Commercial 2,589 228 - - 2,817 Construction 1,150 337 (997 ) - 490 Commercial loans 949 (291 ) (23 ) 210 845 Home equity lines of credit 76 33 (60 ) 19 68 Consumer and installment loans - 4 - - 4 Acquired: Residential 26 39 - - 65 Total $ 5,150 $ 389 $ (1,144 ) $ 229 $ 4,624 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 March 31, 2019 and June 30, 2018 (in thousands): March 31, 2019 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 $ 1,785 $ 258,905 $ 1,280 $ 261,970 $ 132 $ 257 $ 89 $ 478 Commercial 1,403 496,410 1,471 499,284 - 3,235 - 3,235 Construction - 16,302 - 16,302 - 200 - 200 Commercial loans 1,883 124,631 - 126,514 2 949 - 951 Home equity lines of credit 699 33,667 159 34,525 7 67 - 74 Consumer and overdrafts - 459 - 459 - 7 - 7 Total $ 5,770 $ 930,374 $ 2,910 $ 939,054 $ 141 $ 4,715 $ 89 $ 4,945 June 30, 2018 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 $ 2,360 $ 246,913 $ 1,305 $ 250,578 $ 154 $ 232 $ 73 $ 459 Commercial 1,683 492,105 1,477 495,265 - 3,073 - 3,073 Construction 2,260 15,092 - 17,352 276 229 - 505 Commercial loans 2,451 101,684 - 104,135 9 771 - 780 Home equity lines of credit 360 36,867 168 37,395 12 68 - 80 Consumer and overdrafts - 745 - 745 - 7 - 7 Total $ 9,114 $ 893,406 $ 2,950 $ 905,470 $ 451 $ 4,380 $ 73 $ 4,904 The following tables present information related to loans individually evaluated for impairment (excluding loans acquired with deteriorated credit quality) by class of loans as of March 31, 2019 and June 30, 2018 (in thousands): March 31, 2019 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses With no related allowance recorded: Residential $ 1,064 $ 1,037 $ - Commercial 1,481 1,403 - Commercial loans 5,146 1,853 - Home equity lines of credit 679 613 - With a related allowance recorded: Residential 726 748 132 Commercial loans 30 30 2 Home equity lines of credit 89 86 7 Total $ 9,215 $ 5,770 $ 141 June 30, 2018 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses With no related allowance recorded: Residential $ 1,659 $ 1,576 $ - Commercial 1,765 1,683 - Commercial loans 2,254 2,098 - Home equity lines of credit 341 341 - With a related allowance recorded: Residential 742 784 154 Construction 3,257 2,260 276 Commercial loans 353 353 9 Home equity lines of credit 84 19 12 Total $ 10,455 $ 9,114 $ 451 The tables below present the average recorded investment and interest income recognized on loans individually evaluated for impairment, by class of loans, for the three and nine months ended March 31, 2019 and 2018 (in thousands): Three months ended Three months ended March 31, 2019 March 31, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 1,317 $ 9 $ 2,776 $ 13 Commercial 1,408 11 2,440 37 Commercial loans 1,862 42 3,027 68 Home equity lines of credit 616 - 452 - With a related allowance recorded: Residential 750 4 452 4 Construction - - 2,260 - Commercial loans 39 - 1,417 14 Home equity lines of credit 87 - 11 - Total $ 6,079 $ 66 $ 12,835 $ 136 Nine Months Ended Nine Months Ended March 31, 2019 March 31, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 1,516 $ 20 $ 3,360 $ 179 Commercial 1,494 37 2,447 91 Construction 2,131 138 121 17 Commercial loans 628 9 3,704 228 Home equity lines of credit - - 549 20 With a related allowance recorded: Residential 752 11 454 11 Construction 1,130 - 2,858 - Commercial loans 40 1 1,439 45 Home equity lines of credit 88 - 11 - Total $ 7,779 $ 216 $ 14,943 $ 591 The following table presents the recorded investment in nonaccrual loans and in loans past due over 90 days and still on accrual status, by class of loans as of March 31, 2019 and June 30, 2018 (in thousands): Loans Past Due Over 90 Days Nonaccrual and Still Accruing March 31, June 30, March 31, June 30, 2019 2018 2019 2018 Originated: Residential $ 541 $ 604 $ - $ - Commercial - 262 - - Construction - 2,260 - - Commercial loans 273 788 - - Home equity lines of credit 391 45 - - Acquired: Residential 802 1,308 - - Commercial 543 532 - - Home equity lines of credit 296 303 - - Total $ 2,846 $ 6,102 $ - $ - 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 past due over 90 days that are accounted for as purchased credit impaired loans totaling $1.1 million as of both March 31, 2019 and June 30, 2018. 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 class of loans as of March 31, 2019 and June 30, 2018 (in thousands): March 31, 2019 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current Total Originated: Residential $ - $ - $ 461 $ 461 $ 212,028 $ 212,489 Commercial - - - - 440,114 440,114 Construction - - - - 16,302 16,302 Commercial loans 158 - - 158 126,169 126,327 Home equity lines of credit - - 316 316 29,581 29,897 Consumer and overdrafts - 1 - 1 443 444 Total originated 158 1 777 936 824,637 825,573 Acquired: Residential - - 1,010 1,010 48,471 49,481 Commercial - - 1,122 1,122 58,048 59,170 Commercial loans - - - - 187 187 Home equity lines of credit - 69 296 365 4,263 4,628 Consumer and overdrafts - - - - 15 15 Total acquired - 69 2,428 2,497 110,984 113,481 Total $ 158 $ 70 $ 3,205 $ 3,433 $ 935,621 $ 939,054 June 30, 2018 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current Total Originated: Residential $ - $ 394 $ 210 $ 604 $ 194,986 $ 195,590 Commercial - - 262 262 420,320 420,582 Construction - - 2,260 2,260 15,092 17,352 Commercial loans - - 500 500 102,767 103,267 Home equity lines of credit - - 45 45 32,311 32,356 Consumer and overdrafts - - - - 733 733 Total originated - 394 3,277 3,671 766,209 769,880 Acquired: Residential - 232 1,806 2,038 52,950 54,988 Commercial - - 1,112 1,112 73,571 74,683 Commercial loans - - - - 868 868 Home equity lines of credit 30 - 296 326 4,713 5,039 Consumer and overdrafts - - - - 12 12 Total acquired 30 232 3,214 3,476 132,114 135,590 Total $ 30 $ 626 $ 6,491 $ 7,147 $ 898,323 $ 905,470 Troubled Debt Restructurings The terms of certain loans were modified as troubled debt restructurings. 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. As of both March 31, 2019 and June 30, 2018, the Company had 12 loans classified as troubled debt restructurings totaling $3.5 million and $3.8 million, respectively. The Company has allocated $129,000 and $139,000, respectively, of specific reserves to customers whose loan terms have been modified in troubled debt restructurings as of March 31, 2019 and June 30, 2018. The Company has not committed to lend additional amounts to customers with outstanding loans that are classified as troubled debt restructurings. The Company modified two loans with a total carrying amount of $428,000, one residential mortgage and one home equity line of credit, in troubled debt restructurings during the nine months ended March 31, 2019. The Company did not modify any loans as troubled debt restructuring during the three months ended March 31, 2019 or during the three or nine months ended March 31, 2018. The Company had no troubled debt restructurings for which there was a payment default in the three or nine months ended March 31, 2019 that were modified in the twelve months prior to default. There were no such defaults during the three months ended March 31, 2018. There were two troubled debt restructuring with a total carrying amount of $1.1 million at March 31, 2018 for which there was a payment default in the nine months ended March 31, 2018 and resulted in a $2,000 increase to the allowance for loan losses. One default with a carrying amount of $807,000, was cured as of March 31, 2018. 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. 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 utilized 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 class of loans is as follows (in thousands): March 31, 2019 Pass Special Mention Substandard Doubtful Total Originated: Residential $ 210,771 $ 1,143 $ 575 $ - $ 212,489 Commercial 439,642 342 130 - 440,114 Construction 16,302 - - - 16,302 Commercial loans 116,129 6,607 3,591 - 126,327 Home equity lines of credit 29,438 92 367 - 29,897 Consumer and overdrafts 444 - - - 444 Total originated 812,726 8,184 4,663 - 825,573 Acquired: Residential 47,312 214 1,955 - 49,481 Commercial 56,330 825 2,015 - 59,170 Commercial loans 184 3 - - 187 Home equity lines of credit 3,768 474 386 - 4,628 Consumer and overdrafts 15 - - - 15 Total acquired 107,609 1,516 4,356 - 113,481 Total $ 920,335 $ 9,700 $ 9,019 $ - $ 939,054 June 30, 2018 Pass Special Mention Substandard Doubtful Total Originated: Residential $ 194,341 $ 571 $ 678 $ - $ 195,590 Commercial 418,370 - 2,212 - 420,582 Construction 15,092 - 2,260 - 17,352 Commercial loans 98,205 167 4,895 - 103,267 Home equity lines of credit 32,167 144 45 - 32,356 Consumer and overdrafts 733 - - 733 Total originated 758,908 882 10,090 - 769,880 Acquired: Residential 51,858 249 2,881 - 54,988 Commercial 71,832 842 2,009 - 74,683 Commercial loans 857 11 - - 868 Home equity lines of credit 4,641 - 398 - 5,039 Consumer and overdrafts 12 - - - 12 Total acquired 129,200 1,102 5,288 - 135,590 Total $ 888,108 $ 1,984 $ 15,378 $ - $ 905,470 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 March 31, 2019 and June 30, 2018 is as follows (in thousands): March 31, June 30, 2019 2018 Residential $ 1,191 $ 1,232 Commercial 1,471 1,477 Home equity lines of credit 159 168 Carrying amount, net of allowance of $89 and $73, respectively $ 2,821 $ 2,877 The allowance for loan losses on purchased credit impaired loans increased $16,000 during the three and nine months ended March 31, 2019. Accretable yield, or income expected to be collected, for acquired loans is as follows (in thousands): Three Months Ended March 31, Nine Months Ended March 31, 2019 2018 2019 2018 Beginning balance $ 219 $ 238 $ 245 $ 403 New loans acquired - - - - Accretion income (14 ) (7 ) (40 ) (59 ) Reclassification from non-accretable difference - - - - Disposals - - - (113 ) Ending balance $ 205 $ 231 $ 205 $ 231

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	9 Months Ended
	Mar. 31, 2019
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 January 1, 2019 $ (1,300 ) $ (4,921 ) $ (250 ) $ (6,471 ) Other comprehensive income before reclassifications 757 - - 757 Amounts reclassified from accumulated other comprehensive income - 145 9 154 Less tax effect (160 ) (30 ) (1 ) (191 ) Net other comprehensive income 597 115 8 720 Balance at March 31, 2019 $ (703 ) $ (4,806 ) $ (242 ) $ (5,751 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at January 1, 2018 $ (669 ) $ (4,763 ) $ (238 ) $ (5,670 ) Other comprehensive loss before reclassifications (705 ) - - (705 ) Amounts reclassified from accumulated other comprehensive income - 182 10 192 Less tax effect 149 (39 ) (3 ) 107 Net other comprehensive (loss) income (556 ) 143 7 (406 ) Reclassification of certain tax effects on other comprehensive income (1) (132 ) (938 ) (47 ) (1,117 ) Balance at March 31, 2018 $ (1,357 ) $ (5,558 ) $ (278 ) $ (7,193 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2018 $ (1,536 ) $ (5,150 ) $ (264 ) $ (6,950 ) Other comprehensive income before reclassifications 1,110 - - 1,110 Amounts reclassified from accumulated other comprehensive income (55 ) 435 27 407 Tax effect (222 ) (91 ) (5 ) (318 ) Net other comprehensive income 833 344 22 1,199 Balance at March 31, 2019 $ (703 ) $ (4,806 ) $ (242 ) $ (5,751 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2017 $ 37 $ (5,002 ) $ (250 ) $ (5,215 ) Other comprehensive loss before reclassifications (1,635 ) - - (1,635 ) Amounts reclassified from accumulated other comprehensive income (139 ) 544 26 431 Tax effect 512 (162 ) (7 ) 343 Net other comprehensive (loss) income (1,262 ) 382 19 (861 ) Reclassification of certain tax effects on other comprehensive income (1) (132 ) (938 ) (47 ) (1,117 ) Balance at March 31, 2018 $ (1,357 ) $ (5,558 ) $ (278 ) $ (7,193 ) (1) Represents the impact of adopting ASU 2018-02 requiring the reclassification of certain stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017 from accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 (or portion thereof) is recorded. The amount of the reclassification is the difference between the historical corporate income tax rate (34 percent) and the newly enacted 21 percent corporate income tax rate. The reclassification is as of March 31, 2018; no prior period information has been retroactively adjusted as a result of implementing the ASU.

Post-Retirement Benefits

Post-Retirement Benefits	9 Months Ended
	Mar. 31, 2019
Compensation And Retirement Disclosure [Abstract]
Post-Retirement Benefits	Note 6 . Post-Retirement Benefits Employee Pension Plan Supplemental Executive Retirement Plans Net periodic benefit cost and other amounts recognized in other comprehensive income for the three and nine months ended March 31, 2019 and 2018 (in thousands): Three Months Ended Three Months Ended March 31, 2019 March 31, 2018 Defined Benefit Plan Supplemental Retirement Plans Defined Benefit Plan Supplemental Retirement Plans Service cost $ - $ 78 $ - $ 149 Interest cost 250 36 242 26 Expected return on plan assets (513 ) - (505 ) - Amortization of prior net loss 145 9 - - Amortization of prior service cost - - 182 10 Net periodic (benefit) cost $ (118 ) $ 123 $ (81 ) $ 185 Nine Months Ended Nine Months Ended March 31, 2019 March 31, 2018 Defined Benefit Plan Supplemental Retirement Plan Defined Benefit Plan Supplemental Retirement Plan Service cost $ - $ 373 $ - $ 369 Interest cost 750 88 726 76 Expected return on plan assets (1,539 ) - (1,511 ) - Amortization of prior net loss 435 27 544 26 Amortization of prior service cost - - - - Net periodic (benefit) cost $ (354 ) $ 488 $ (241 ) $ 471 The Company made no contributions to the defined benefit plan during the three and nine months ended March 31, 2019. 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 plan is a tax-qualified retirement plan for the benefit of Company employees. On April 20, 2017 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 (5.5% at March 31, 2019). Loan payments are principally funded by cash contributions from the Bank. The loan is secured by the shares purchased, which are held in a suspense account for allocation among participants as the loan is repaid. The balance of the ESOP loan at March 31, 2019 was $12.6 million. Contributions are allocated to eligible participants on the basis of compensation, subject to federal tax limits. The number of shares committed to be released annually is 96,881 through 2032. Shares held by the ESOP include the following (dollars in thousands): March 31, 2019 June 30, 2018 Allocated to participants 216,854 144,923 Unearned 1,236,355 1,308,286 Total ESOP shares 1,453,209 1,453,209 Fair value of unearned shares $ 24,647 $ 25,996 Total compensation expense recognized in connection with the ESOP for the three and nine or the three and nine

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Mar. 31, 2019
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 Real estate owned 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 March 31, 2019 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 49,612 $ - $ 49,612 Corporate and other debt securities - 8,316 - 8,316 Mortgage-backed securities – residential - 28,086 - 28,086 Derivatives – interest rate contracts - 526 - 526 Total assets at fair value $ - $ 86,540 $ - $ 86,540 Derivatives – interest rate contracts $ - $ 526 $ - $ 526 Total liabilities at fair value $ - $ 526 $ - $ 526 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 698 $ 698 Commercial loans - - 28 28 Home equity lines of credit - - 80 80 Foreclosed real estate - - 653 653 Total assets at fair value $ - $ - $ 1,459 $ 1,459 Fair Value Measurements Level 1 Level 2 Level 3 Total June 30, 2018 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 63,430 $ - $ 63,430 Corporate and other debt securities - 8,235 - 8,235 Mortgage-backed securities – residential - 33,807 - 33,807 Total assets at fair value $ - $ 105,472 $ - $ 105,472 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 688 $ 688 Construction - - 1,984 1,984 Commercial loans - - 845 845 Home equity lines of credit - - 7 7 Foreclosed real estate - - 460 460 Total assets at fair value $ - $ - $ 3,984 $ 3,984 There were no transfers between levels within the fair value hierarchy during the three and nine months ended March 31, 2019 and 2018. Impaired loans in the preceding table had a carrying amount of $945,000, and a remaining valuation allowance of $141,000 at March 31, 2019, as compared to $3.9 million and $451,000, respectively, as of June 30, 2018. Impaired loans measured at fair value incurred no net charge-offs and resulted in a provision for loan losses of $9,000 during the nine months ended March 31, 2019. Impaired loans measured at fair value as of March 31, 2018 incurred $1.1 million of net charge-offs and resulted in an additional provision for loan losses of $201,000 during the nine months ended March 31, 2018. 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 March 31, 2019 and June 30, 2018 (dollars in thousands): Valuation Unobservable Range or Fair Value Technique(s) Input(s) Rate Used March 31, 2019: Impaired loans - residential mortgages $ 698 Discounted cash flow Discount rate 5.4% to 6.3% Sales comparison Adjustments for differences in sales comparables -24.3% to -10.2% Impaired loans - commercial loans 28 Discounted cash flow Discount rate 7.0% Impaired loans - home equity lines of credit 80 Discounted cash flow Discount rate 6.3% Sales comparison Adjustments for differences in sales comparables -24.3% to -10.2% Foreclosed real estate 653 Sales comparison Adjustments for differences in sales comparables -8.0% to 45.0% June 30, 2018: Impaired loans - residential mortgages $ 688 Sales comparison Adjustments for differences in sales comparables -5.1% to 20.9% Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - construction 1,984 Sales contract Discount to sales contract 9.8% Impaired loans - commercial loans 845 Discounted cash flow Discount rate 5.3% to 7.5% Sales contract Discount to sales contract 9.8% Impaired loans - home equity lines of credit 7 Sales comparison Adjustments for differences in sales comparables -5.1% to 20.9% Discounted cash flow Discount rate 6.3% Foreclosed real estate 460 Sales comparison Adjustments for differences in sales comparables -8.1% to -0.4% 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 March 31, 2019: Financial assets: Cash and cash equivalents $ 87,105 $ 87,105 $ - $ - $ 87,105 Investment securities held to maturity 354,000 - 351,184 - 351,184 Investment securities available for sale 86,014 - 86,014 - 86,014 Loans receivable, net 935,680 - - 923,683 923,683 Accrued interest receivable 5,037 - 1,694 3,343 5,037 Federal Home Loan Bank stock 2,384 N/A N/A N/A N/A Derivative assets - interest rate contracts 526 - 526 - 526 Financial liabilities: Demand, NOW, money market deposits and savings accounts 774,999 774,999 - - 774,999 Time deposits 427,194 - 431,302 - 431,302 Mortgage escrow funds 7,675 7,675 - - 7,675 FHLB advances 26,248 - 26,537 - 26,537 Derivative liabilities - interest rate contracts 526 - 526 - 526 June 30, 2018: Financial assets: Cash and cash equivalents $ 62,145 $ 62,145 $ - $ - $ 62,145 Investment securities held to maturity 353,183 - 343,188 - 343,188 Investment securities available for sale 105,472 - 105,472 - 105,472 Loans receivable, net 902,336 - - 882,319 882,319 Accrued interest receivable 4,358 - 1,402 2,956 4,358 Federal Home Loan Bank stock 2,050 N/A N/A N/A N/A Financial liabilities: Demand, NOW, money market deposits and savings accounts 765,084 765,084 - - 765,084 Time deposits 392,373 - 394,205 - 394,205 Mortgage escrow funds 8,803 8,803 - - 8,803 FHLB advances 18,841 - 20,574 - 20,574 In connection with the adoption of ASU 2016-01 on July 1, 2018, we refined our methodology to estimate the fair value of our loan portfolio using an exit price notion resulting in prior periods no longer being comparable. The exit price notion requires determination of the price at which willing market participants would transact at the measurement date under current market conditions depending on facts and circumstances, such as origination rates, credit risk, transaction costs, liquidity, national and regional market trends and other adjustments, utilizing publicly available rates and indices. The application of an exit price notion requires the use of significant judgment. The prior period estimate of loans receivable, net was determined using an entrance price methodology based only on the discounted value of contracted cash flows based on prevailing interest rates.

Regulatory Capital

Regulatory Capital	9 Months Ended
	Mar. 31, 2019
Banking And Thrift [Abstract]
Regulatory Capital	Note 8. Regulatory Capital The following is a summary of the Bank’s actual capital amounts and ratios as of March 31, 2019 and June 30, 2018, compared to the required ratios for minimum capital adequacy and for classification as well capitalized (dollars in thousands). As a result of the Economic Growth, Regulatory Relief, and Consumer Protection Act passed by Congress in 2018, the Company is no longer subject to consolidated capital requirements, as the Company’s total consolidated assets do not exceed $3 billion, and thus the consolidated capital ratios are no longer required to be disclosed in the financial statements. To Be Well Capitalized Under Prompt For Capital Adequacy Corrective Action Bank Actual Purposes Provisions Amount Ratio Amount Ratio Amount Ratio March 31, 2019: PCSB Bank Leverage (Tier 1) $ 207,968 13.7 % $ 60,687 4.0 % $ 75,859 5.0 % Risk-based: Common Tier 1 207,968 20.5 45,712 4.5 66,028 6.5 Tier 1 207,968 20.5 60,949 6.0 81,265 8.0 Total 212,913 21.0 81,265 8.0 101,581 10.0 June 30, 2018: PCSB Bank Leverage (Tier 1) $ 200,488 13.6 % $ 58,924 4.0 % $ 73,655 5.0 % Risk-based: Common Tier 1 200,488 21.1 42,745 4.5 61,743 6.5 Tier 1 200,488 21.1 56,994 6.0 75,991 8.0 Total 205,392 21.6 75,991 8.0 94,989 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. The implementation of the capital conservation buffer began on January 1, 2016 at the 0.625% level and was phased in over a four-year period through January 1, 2019. As of January 1, 2019, the conservation buffer was fully phased in. Management believes that as of March 31, 2019 and June 30, 2018, the Bank met all capital adequacy requirements to which it was subject, including the capital conservation buffer of 2.5% and 1.875% as of March 31, 2019 and June 30, 2018, 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

Earnings Per Share	9 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Note 9. Earnings Per Share 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 manner, 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 and nine months ended March 31, 2019 and 2018. Three Months Ended March 31, Nine Months Ended March 31, 2019 2018 2019 2018 (amounts in thousands, except share and per share data) Net income applicable to common stock $ 1,986 $ 2,177 $ 6,639 $ 3,935 Average number of common shares outstanding 17,451,763 18,165,110 17,917,077 18,165,110 Less: Average unallocated ESOP shares 1,247,370 1,344,384 1,271,790 1,375,979 Average number of common share soutstanding used to calculate basic earnings per common share 16,204,393 16,820,726 16,645,287 16,789,131 Effect of equity-based awards 57,362 - 14,459 - Average number of common shares outstanding used to calculate diluted earnings per common share 16,261,755 16,820,726 16,659,746 16,789,131 Earnings per common share: Basic $ 0.12 $ 0.13 $ 0.40 $ 0.23 Diluted $ 0.12 $ 0.13 $ 0.40 $ 0.23 Stock options for 1,339,293 shares of common stock were not considered in computing diluted earnings per common share for both the three and nine months ended March 31, 2019 because they were antidilutive. There were no potentially dilutive common stock equivalents during the three or nine months ended March 31, 2018.

Derivatives and Hedging

Derivatives and Hedging	9 Months Ended
	Mar. 31, 2019
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 Company had no interest rate swaps as of June 30, 2018. The following table presents summary information about the interest rate swaps as of March 31, 2019: March 31, (dollars in thousands) 2019 Notional amounts $ 16,525 Weighted average pay rates 4.39 % Weighted average receive rates 4.39 % Weighted average maturity 9.58 years Fair value of combined interest rate swaps $ -

Revenue From Contracts With Cus

Revenue From Contracts With Customers	9 Months Ended
	Mar. 31, 2019
Revenue From Contract With Customer [Abstract]
Revenue From Contracts With Customers	Note 11. Revenue From Contracts With Customers The Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606) In accordance with ASU 2014-09, 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 Company’s revenue streams that are within the scope of the accounting standard are: (1) fees and service charges on deposit accounts (including interchange fees), which, are included on the Consolidated Statements of Operations as “Fees and service charges” and (2) gains on the sale of foreclosed real estate. For the three and nine months ended March 31, 2019 fees and services charges totaled $436,000 and $1.3 million, of which and $390,000 and $1.2 million, respectively, were revenue streams within the scope of the accounting standard. For the three and nine months ended March 31, 2018 fees and services charges totaled $352,000 and $1.1 million, of which $335,000 and $935,000, respectively, were in-scope revenue streams. 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. For the three and nine months ended March 31, 2019 fees and service charges on deposit accounts were $295,000 and $892,000, and for the three and nine months ended March 31, 2018 fees and service charges on deposit accounts were $242,000 and $649,000, respectively. 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. For the three and nine months ended March 31, 2019 interchange income was $95,000 and $314,000, and for the three and nine months ended March 31, 2018 interchange income was $93,000 and $286,000, respectively. Gain/Losses 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. For the three and nine months ended March 31, 2019, gains on sale of foreclosed real estate were $0 and $24,000, compared to $13,000 and $27,000, for the three and nine months ended March 31, 2018, respectively.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Mar. 31, 2019
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. Concurrent with the approval of the Plan, on October 24, 2018, 431,039 stock options and 183,884 restricted stock awards (“RSAs”) were granted to non-employee directors. Additionally, on November 14, 2018 the Board of Directors approved employee grants of 908,254 stock options and 363,301 RSAs. All grants of stock options and RSAs have a 5-year vesting period. Total compensation cost that has been charged against income for the Plan was $829,000 and $1.3 million for the three and nine months ended March 31, 2019. Restricted Stock Awards 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, however may not vest more rapidly than over a three-year period. 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 547,185 shares were issued as of March 31, 2019. The following table presents a summary of RSA activity during the period ended March 31, 2019. Number of Shares Weighted-Average Grant Date Fair Value Unvested allocated shares outstanding at July 1, 2018 - $ - Shares granted 547,185 19.02 Shares vested - - Shares forfeited - - Unvested allocated shares at March 31, 2019 547,185 $ - As of March 31, 2019, there was $9.6 million of total unrecognized compensation cost related to nonvested shares granted under the Plan. The cost is expected to be recognized over a weighted-average period of 4.6 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 period, and have a contractual term of 10 years. The Company has a policy of using shares held as a treasury stock to satisfy share option exercises. Currently, the Company has a sufficient number of treasury shares to satisfy the current level of exercisable share options. The fair value of each option award is estimated on the date of grant using a closed form 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 current year was determined using the following weighted-average assumptions as of grant date. Risk-free interest rate 3.03 % Expected term 6.50 Expected stock price volatility 18.26 % Dividend yield 0.63 % Weighted average fair value of options granted $ 4.61 As of March 31, 2019, there was $5.7 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 4.6 years. 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, 2018 - $ - $ - Options granted 1,339,293 19.04 Options expired - - Options exercised - - Options outstanding at March 31, 2019 1,339,293 $ 19.04 9.6 $ 715 Fully vested and expected to vest 1,339,293 $ 19.04 9.6 $ 715 Exercisable at March 31, 2019 - $ - $ -

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Mar. 31, 2019
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 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 the 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, 2018, 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.
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. Accounting Standards Adopted in the Period In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09 “Revenue from Contracts with Customers,” and was later amended by ASU 2015-14, ASU 2016-08, ASU 2016-10, ASU 2016-12 and 2016-20. These updates provide a comprehensive framework for addressing revenue recognition issues that can be applied to all contracts with customers. The amendments also include improved disclosures to enable users of financial statements to better understand the nature, amount, timing and uncertainty of revenue that is recognized. While the guidance in ASU 2014-09 supersedes most existing industry-specific revenue recognition accounting guidance, much of the Company’s revenue comes from financial instruments such as debt securities and loans that are outside the scope of the guidance. The Company’s material revenue streams that are in the scope of ASU 2014-09 are fees on deposit accounts (including interchange fees) and foreclosed real estate gains and losses. All other revenue streams are immaterial or are in the scope of other GAAP requirements which take precedence and therefore are not in the scope of ASU 2014-09. Based on the Company’s analysis, ASU 2014-09 will not materially change the recognition of revenue on service fees on deposit accounts as the contracts are day to day and recognized as the service is provided. Gains and losses on the sale of foreclosed real estate are generally accounted for under ASC 610. However, ASU 2014-09 also added a new Subtopic 610-20 which addresses the recognition of gains and losses on the transfer of nonfinancial and in-substance nonfinancial assets. Gain and loss recognition is not expected to change except for foreclosed real estate and other nonfinancial asset sales that are financed by the Company. In the case of financed sales, the Company will need to evaluate each contract to determine whether each contract criteria are met, including whether it is probable that it will collect substantially all consideration to which it is entitled. The Company will also need to evaluate whether the financing terms offered to the buyer of the nonfinancial asset are market terms when determining the transaction price. The Company has evaluated the impact of ASU 2014-09 and the amendments upon adoption as of July 1, 2018. In evaluating this standard, management has determined that the majority of revenue earned by the Company is from revenue streams not included in the scope of this standard and for in scope revenue streams management determined that, based on the modified retrospective method, a cumulative-effect adjustment to opening retained earnings as a result of adopting this standard is not needed. Additional disclosures required under ASU 2014-09 are contained in Note 11. In January 2016, the FASB issued ASU 2016-01, an amendment to “Recognition and Measurement of Financial Assets and Financial Liabilities.” The amendments in ASU 2016-01 are intended to improve the recognition, measurement, presentation and disclosure of financial assets and liabilities to provide users of financial statements with information that is more useful for decision-making purposes. Among other changes, ASU 2016-01 would: (1) require equity securities to be reclassified out of available for sale and measured at fair value with changes in fair value recognized through net income but would allow equity securities that do not have readily determinable fair values to be re-measured at fair value either upon the occurrence of an observable price change or upon identification of an impairment, (2) simplify the impairment assessment of such equity securities and would require enhanced disclosure about these investments, (3) require separate presentation of financial assets and liabilities by measurement category and type of instrument, such as securities or loans, on the balance sheet or in the notes, and would eliminate certain other disclosures relating to the methods and assumptions used to estimate fair value for financial assets measured at amortized cost on the balance sheet, and (4) require the use of an exit price notion when measuring the fair value of financial instruments. The adoption of ASU 2016-01, and subsequent amendments, on July 1, 2018 did not have a material impact on the Company’s consolidated financial statements. In March 2017, the FASB issued ASU 2017-07 “Compensation – Retirement Benefits”. The ASU requires companies that offer employee defined pension plans, other postretirement benefit plans, or other types of benefit plans accounted for under Topic 715 to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The adoption of ASU 2017-07 resulted in credits to non-service cost of $73,000 and $239,000, and $45,000 and $139,000 to be included in other operating expense for the three and nine months ended March 31, 2019 and 2018, respectively. Future Application of Accounting Pronouncements Previously Issued In February 2016, the FASB issued ASU 2016-02 “Leases.” ASU 2016-02 affects any entity that enters into a lease and is intended to increase the transparency and comparability of financial statements among organizations. The ASU requires, among other changes, a lessee to recognize on its balance sheet a lease asset and a lease liability for those leases previously classified as operating leases. The lease asset would represent the right to use the underlying asset for the lease term and the lease liability would represent the discounted value of the required lease payments to the lessor. The ASU would also require entities to disclose key information about leasing arrangements. The amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2019, including interim periods within that fiscal year. The Company currently leases eleven branches and two administrative offices. ASU 2016-02 will result in the establishment of a right to use asset and corresponding lease obligation. The impact to the Company’s consolidated financial position has yet to be determined by management, however the ASU is not expected to have a material impact on the Company’s consolidated results of operations or disclosures. 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. The amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2020, including interim periods within that fiscal year. Early adoption is permitted beginning after December 15, 2018, including interim periods within those fiscal years. 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 is evaluating the need for a third-party software service provider to assist in the Company's implementation. In January 2017, the FASB issued ASU 2017-04 “Intangibles – Goodwill and Other (Topic 350).” In March 2017, the FASB issued ASU 2017-08 "Receivables - Non-Refundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." The ASU requires premiums on callable debt securities to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments in this update will be effective for the Company for the fiscal year beginning on July 1, 2020, including interim periods within that fiscal year. Early adoption is permitted beginning after December 15, 2018, including interim periods within those fiscal years. ASU 2017-08 will not have a material impact on the Company’s consolidated financial position, results of operations or disclosures.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Mar. 31, 2019
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 March 31, 2019 and June 30, 2018 were as follows: March 31, 2019 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 49,977 $ 36 $ (401 ) $ 49,612 Corporate and other debt securities 8,364 - (48 ) 8,316 Mortgage-backed securities – residential 28,560 9 (483 ) 28,086 Total available for sale $ 86,901 $ 45 $ (932 ) $ 86,014 Held to maturity: U.S. Government and agency obligations $ 106,544 $ 84 $ (882 ) $ 105,746 Corporate and other debt securities 34,035 229 (122 ) 34,142 Mortgage-backed securities – residential 135,352 225 (1,647 ) 133,930 Mortgage-backed securities – collateralized mortgage obligations 49,538 54 (698 ) 48,894 Mortgage-backed securities – commercial 28,531 139 (198 ) 28,472 Total held to maturity $ 354,000 $ 731 $ (3,547 ) $ 351,184 June 30, 2018 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 64,389 $ - $ (959 ) $ 63,430 Corporate and other debt securities 8,406 - (171 ) 8,235 Mortgage-backed securities – residential 34,619 81 (893 ) 33,807 Total available for sale $ 107,414 $ 81 $ (2,023 ) $ 105,472 Held to maturity: U.S. Government and agency obligations $ 122,048 $ - $ (2,274 ) $ 119,774 Corporate and other debt securities 4,000 - (126 ) 3,874 Mortgage-backed securities – residential 140,478 32 (4,846 ) 135,664 Mortgage-backed securities – collateralized mortgage obligations 53,547 - (1,815 ) 51,732 Mortgage-backed securities – commercial 33,110 11 (977 ) 32,144 Total held to maturity $ 353,183 $ 43 $ (10,038 ) $ 343,188
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 March 31, 2019, by contractual maturity. 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 (in thousands) March 31, 2019: 1 year or less $ 27,550 $ 27,389 $ 18,007 $ 17,907 1 to 5 years 83,994 83,419 40,334 40,021 5 to 10 years 25,035 25,155 - - Mortgage-backed securities and other 217,421 215,221 28,560 28,086 Total $ 354,000 $ 351,184 $ 86,901 $ 86,014
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 March 31, 2019 and June 30, 2018 March 31, 2019 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: U.S. Government and agency obligations $ - $ - $ 44,657 $ (401 ) $ 44,657 $ (401 ) Corporate and other debt securities - - 8,316 (48 ) 8,316 (48 ) Mortgage-backed securities – residential - - 25,806 (483 ) 25,806 (483 ) Total available for sale $ - $ - $ 78,779 $ (932 ) $ 78,779 $ (932 ) Held to maturity: U.S. Government and agency obligations $ - $ - $ 95,669 $ (882 ) 95,669 $ (882 ) Corporate and other debt securities 2,453 (47 ) 3,925 (75 ) 6,378 (122 ) Mortgage-backed securities – residential - - 111,881 (1,647 ) 111,881 (1,647 ) Mortgage-backed securities – collateralized mortgage obligations - - 40,744 (698 ) 40,744 (698 ) Mortgage-backed securities – commercial - - 18,099 (198 ) 18,099 (198 ) Total held to maturity $ 2,453 $ (47 ) $ 270,318 $ (3,500 ) $ 272,771 $ (3,547 ) June 30, 2018 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 U.S. Government and agency obligations $ 41,762 $ (569 ) $ 21,668 $ (390 ) $ 63,430 $ (959 ) Corporate and other debt securities 6,258 (148 ) 1,977 (23 ) 8,235 (171 ) Mortgage-backed securities – residential 13,397 (379 ) 14,718 (514 ) 28,115 (893 ) Total available for sale $ 61,417 $ (1,096 ) $ 38,363 $ (927 ) $ 99,780 $ (2,023 ) Held to maturity U.S. Government and agency obligations $ 46,163 $ (871 ) $ 71,611 $ (1,403 ) $ 117,774 $ (2,274 ) Corporate and other debt securities 3,874 (126 ) - - 3,874 (126 ) Mortgage-backed securities – residential 102,496 (3,338 ) 32,490 (1,508 ) 134,986 (4,846 ) Mortgage-backed securities – collateralized mortgage obligations 31,124 (884 ) 20,608 (931 ) 51,732 (1,815 ) Mortgage-backed securities – commercial 21,762 (582 ) 8,629 (395 ) 30,391 (977 ) Total held to maturity $ 205,419 $ (5,801 ) $ 133,338 $ (4,237 ) $ 338,757 $ (10,038 )

Loans Receivable (Tables)

Loans Receivable (Tables)	9 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable are summarized as follows (in thousands): March 31, June 30, 2019 2018 Mortgage loans: Residential $ 261,970 $ 250,578 Commercial 499,284 495,265 Construction 16,302 17,352 Net deferred loan origination costs 843 1,041 Total mortgage loans 778,399 764,236 Commercial and consumer loans: Commercial loans 126,514 104,135 Home equity lines of credit 34,525 37,395 Consumer and overdrafts 459 745 Net deferred loan origination costs 728 729 Total commercial and consumer loans 162,226 143,004 Total loans receivable 940,625 907,240 Allowance for loan losses (4,945 ) (4,904 ) Loans receivable, net $ 935,680 $ 902,336
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 and nine months ended March 31, 2019 and 2018 (in thousands): Three Months Ended March 31, 2019 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 379 $ 8 $ - $ 2 $ 389 Commercial 3,261 (26 ) - - 3,235 Construction 258 (58 ) - - 200 Commercial loans 880 69 - 2 951 Home equity lines of credit 82 (8 ) - - 74 Consumer and overdrafts 10 6 (11 ) 2 7 Acquired: Residential 73 16 - - 89 Total $ 4,943 $ 7 $ (11 ) $ 6 $ 4,945 Three Months Ended March 31, 2018 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 402 $ (20 ) $ (47 ) $ - $ 335 Commercial 2,686 131 - - 2,817 Construction 400 90 - - 490 Commercial loans 844 (186 ) (23 ) 210 845 Home equity lines of credit 74 35 (60 ) 19 68 Consumer and overdrafts - 4 - - 4 Acquired: Residential 65 - - - 65 Total $ 4,471 $ 54 $ (130 ) $ 229 $ 4,624 Nine Months Ended March 31, 2019 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 386 $ (4 ) $ - $ 7 $ 389 Commercial 3,073 276 (114 ) - 3,235 Construction 505 (401 ) - 96 200 Commercial loans 780 169 - 2 951 Home equity lines of credit 80 (6 ) - - 74 Consumer and installment loans 7 21 (27 ) 6 7 Acquired: Residential 73 16 - - 89 Total $ 4,904 $ 71 $ (141 ) $ 111 $ 4,945 Nine Months Ended March 31, 2018 Beginning Allowance Provision (credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 360 $ 39 $ (64 ) $ - $ 335 Commercial 2,589 228 - - 2,817 Construction 1,150 337 (997 ) - 490 Commercial loans 949 (291 ) (23 ) 210 845 Home equity lines of credit 76 33 (60 ) 19 68 Consumer and installment loans - 4 - - 4 Acquired: Residential 26 39 - - 65 Total $ 5,150 $ 389 $ (1,144 ) $ 229 $ 4,624
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 March 31, 2019 and June 30, 2018 (in thousands): March 31, 2019 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 $ 1,785 $ 258,905 $ 1,280 $ 261,970 $ 132 $ 257 $ 89 $ 478 Commercial 1,403 496,410 1,471 499,284 - 3,235 - 3,235 Construction - 16,302 - 16,302 - 200 - 200 Commercial loans 1,883 124,631 - 126,514 2 949 - 951 Home equity lines of credit 699 33,667 159 34,525 7 67 - 74 Consumer and overdrafts - 459 - 459 - 7 - 7 Total $ 5,770 $ 930,374 $ 2,910 $ 939,054 $ 141 $ 4,715 $ 89 $ 4,945 June 30, 2018 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 $ 2,360 $ 246,913 $ 1,305 $ 250,578 $ 154 $ 232 $ 73 $ 459 Commercial 1,683 492,105 1,477 495,265 - 3,073 - 3,073 Construction 2,260 15,092 - 17,352 276 229 - 505 Commercial loans 2,451 101,684 - 104,135 9 771 - 780 Home equity lines of credit 360 36,867 168 37,395 12 68 - 80 Consumer and overdrafts - 745 - 745 - 7 - 7 Total $ 9,114 $ 893,406 $ 2,950 $ 905,470 $ 451 $ 4,380 $ 73 $ 4,904
Summary of Loans Individually Evaluated for Impairment (Excluding Loans Acquired with Deteriorated Credit Quality) by Class of Loans	The following tables present information related to loans individually evaluated for impairment (excluding loans acquired with deteriorated credit quality) by class of loans as of March 31, 2019 and June 30, 2018 (in thousands): March 31, 2019 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses With no related allowance recorded: Residential $ 1,064 $ 1,037 $ - Commercial 1,481 1,403 - Commercial loans 5,146 1,853 - Home equity lines of credit 679 613 - With a related allowance recorded: Residential 726 748 132 Commercial loans 30 30 2 Home equity lines of credit 89 86 7 Total $ 9,215 $ 5,770 $ 141 June 30, 2018 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses With no related allowance recorded: Residential $ 1,659 $ 1,576 $ - Commercial 1,765 1,683 - Commercial loans 2,254 2,098 - Home equity lines of credit 341 341 - With a related allowance recorded: Residential 742 784 154 Construction 3,257 2,260 276 Commercial loans 353 353 9 Home equity lines of credit 84 19 12 Total $ 10,455 $ 9,114 $ 451
Summary of Average Recorded Investment and Interest Income Recognized on Loans Individually Evaluated for Impairment, by Class of Loans	The tables below present the average recorded investment and interest income recognized on loans individually evaluated for impairment, by class of loans, for the three and nine months ended March 31, 2019 and 2018 (in thousands): Three months ended Three months ended March 31, 2019 March 31, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 1,317 $ 9 $ 2,776 $ 13 Commercial 1,408 11 2,440 37 Commercial loans 1,862 42 3,027 68 Home equity lines of credit 616 - 452 - With a related allowance recorded: Residential 750 4 452 4 Construction - - 2,260 - Commercial loans 39 - 1,417 14 Home equity lines of credit 87 - 11 - Total $ 6,079 $ 66 $ 12,835 $ 136 Nine Months Ended Nine Months Ended March 31, 2019 March 31, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 1,516 $ 20 $ 3,360 $ 179 Commercial 1,494 37 2,447 91 Construction 2,131 138 121 17 Commercial loans 628 9 3,704 228 Home equity lines of credit - - 549 20 With a related allowance recorded: Residential 752 11 454 11 Construction 1,130 - 2,858 - Commercial loans 40 1 1,439 45 Home equity lines of credit 88 - 11 - Total $ 7,779 $ 216 $ 14,943 $ 591
Nonaccrual Loans and in Loans Past Due over 90 Days Still on Accrual Status by Class of Loans	The following table presents the recorded investment in nonaccrual loans and in loans past due over 90 days and still on accrual status, by class of loans as of March 31, 2019 and June 30, 2018 (in thousands): Loans Past Due Over 90 Days Nonaccrual and Still Accruing March 31, June 30, March 31, June 30, 2019 2018 2019 2018 Originated: Residential $ 541 $ 604 $ - $ - Commercial - 262 - - Construction - 2,260 - - Commercial loans 273 788 - - Home equity lines of credit 391 45 - - Acquired: Residential 802 1,308 - - Commercial 543 532 - - Home equity lines of credit 296 303 - - Total $ 2,846 $ 6,102 $ - $ -
Aging of Recorded Investment in Past Due Loans by Class of Loans	The following tables present the aging of the recorded investment in past due loans by class of loans as of March 31, 2019 and June 30, 2018 (in thousands): March 31, 2019 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current Total Originated: Residential $ - $ - $ 461 $ 461 $ 212,028 $ 212,489 Commercial - - - - 440,114 440,114 Construction - - - - 16,302 16,302 Commercial loans 158 - - 158 126,169 126,327 Home equity lines of credit - - 316 316 29,581 29,897 Consumer and overdrafts - 1 - 1 443 444 Total originated 158 1 777 936 824,637 825,573 Acquired: Residential - - 1,010 1,010 48,471 49,481 Commercial - - 1,122 1,122 58,048 59,170 Commercial loans - - - - 187 187 Home equity lines of credit - 69 296 365 4,263 4,628 Consumer and overdrafts - - - - 15 15 Total acquired - 69 2,428 2,497 110,984 113,481 Total $ 158 $ 70 $ 3,205 $ 3,433 $ 935,621 $ 939,054 June 30, 2018 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current Total Originated: Residential $ - $ 394 $ 210 $ 604 $ 194,986 $ 195,590 Commercial - - 262 262 420,320 420,582 Construction - - 2,260 2,260 15,092 17,352 Commercial loans - - 500 500 102,767 103,267 Home equity lines of credit - - 45 45 32,311 32,356 Consumer and overdrafts - - - - 733 733 Total originated - 394 3,277 3,671 766,209 769,880 Acquired: Residential - 232 1,806 2,038 52,950 54,988 Commercial - - 1,112 1,112 73,571 74,683 Commercial loans - - - - 868 868 Home equity lines of credit 30 - 296 326 4,713 5,039 Consumer and overdrafts - - - - 12 12 Total acquired 30 232 3,214 3,476 132,114 135,590 Total $ 30 $ 626 $ 6,491 $ 7,147 $ 898,323 $ 905,470
Summary of Risk Category of Loans by Class of Loans	Based on the most recent analysis performed, the risk category of loans by class of loans is as follows (in thousands): March 31, 2019 Pass Special Mention Substandard Doubtful Total Originated: Residential $ 210,771 $ 1,143 $ 575 $ - $ 212,489 Commercial 439,642 342 130 - 440,114 Construction 16,302 - - - 16,302 Commercial loans 116,129 6,607 3,591 - 126,327 Home equity lines of credit 29,438 92 367 - 29,897 Consumer and overdrafts 444 - - - 444 Total originated 812,726 8,184 4,663 - 825,573 Acquired: Residential 47,312 214 1,955 - 49,481 Commercial 56,330 825 2,015 - 59,170 Commercial loans 184 3 - - 187 Home equity lines of credit 3,768 474 386 - 4,628 Consumer and overdrafts 15 - - - 15 Total acquired 107,609 1,516 4,356 - 113,481 Total $ 920,335 $ 9,700 $ 9,019 $ - $ 939,054 June 30, 2018 Pass Special Mention Substandard Doubtful Total Originated: Residential $ 194,341 $ 571 $ 678 $ - $ 195,590 Commercial 418,370 - 2,212 - 420,582 Construction 15,092 - 2,260 - 17,352 Commercial loans 98,205 167 4,895 - 103,267 Home equity lines of credit 32,167 144 45 - 32,356 Consumer and overdrafts 733 - - 733 Total originated 758,908 882 10,090 - 769,880 Acquired: Residential 51,858 249 2,881 - 54,988 Commercial 71,832 842 2,009 - 74,683 Commercial loans 857 11 - - 868 Home equity lines of credit 4,641 - 398 - 5,039 Consumer and overdrafts 12 - - - 12 Total acquired 129,200 1,102 5,288 - 135,590 Total $ 888,108 $ 1,984 $ 15,378 $ - $ 905,470
Schedule of Carrying Amount of Purchased Credit Impaired Loans	The carrying amount of those loans as of March 31, 2019 and June 30, 2018 is as follows (in thousands): March 31, June 30, 2019 2018 Residential $ 1,191 $ 1,232 Commercial 1,471 1,477 Home equity lines of credit 159 168 Carrying amount, net of allowance of $89 and $73, respectively $ 2,821 $ 2,877
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 March 31, Nine Months Ended March 31, 2019 2018 2019 2018 Beginning balance $ 219 $ 238 $ 245 $ 403 New loans acquired - - - - Accretion income (14 ) (7 ) (40 ) (59 ) Reclassification from non-accretable difference - - - - Disposals - - - (113 ) Ending balance $ 205 $ 231 $ 205 $ 231

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Mar. 31, 2019
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 January 1, 2019 $ (1,300 ) $ (4,921 ) $ (250 ) $ (6,471 ) Other comprehensive income before reclassifications 757 - - 757 Amounts reclassified from accumulated other comprehensive income - 145 9 154 Less tax effect (160 ) (30 ) (1 ) (191 ) Net other comprehensive income 597 115 8 720 Balance at March 31, 2019 $ (703 ) $ (4,806 ) $ (242 ) $ (5,751 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at January 1, 2018 $ (669 ) $ (4,763 ) $ (238 ) $ (5,670 ) Other comprehensive loss before reclassifications (705 ) - - (705 ) Amounts reclassified from accumulated other comprehensive income - 182 10 192 Less tax effect 149 (39 ) (3 ) 107 Net other comprehensive (loss) income (556 ) 143 7 (406 ) Reclassification of certain tax effects on other comprehensive income (1) (132 ) (938 ) (47 ) (1,117 ) Balance at March 31, 2018 $ (1,357 ) $ (5,558 ) $ (278 ) $ (7,193 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2018 $ (1,536 ) $ (5,150 ) $ (264 ) $ (6,950 ) Other comprehensive income before reclassifications 1,110 - - 1,110 Amounts reclassified from accumulated other comprehensive income (55 ) 435 27 407 Tax effect (222 ) (91 ) (5 ) (318 ) Net other comprehensive income 833 344 22 1,199 Balance at March 31, 2019 $ (703 ) $ (4,806 ) $ (242 ) $ (5,751 ) Net unrealized gain (loss) on available for sale securities Unrealized loss on pension benefits Unrealized loss on SERP benefits Total Balance at July 1, 2017 $ 37 $ (5,002 ) $ (250 ) $ (5,215 ) Other comprehensive loss before reclassifications (1,635 ) - - (1,635 ) Amounts reclassified from accumulated other comprehensive income (139 ) 544 26 431 Tax effect 512 (162 ) (7 ) 343 Net other comprehensive (loss) income (1,262 ) 382 19 (861 ) Reclassification of certain tax effects on other comprehensive income (1) (132 ) (938 ) (47 ) (1,117 ) Balance at March 31, 2018 $ (1,357 ) $ (5,558 ) $ (278 ) $ (7,193 ) (1) Represents the impact of adopting ASU 2018-02 requiring the reclassification of certain stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017 from accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 (or portion thereof) is recorded. The amount of the reclassification is the difference between the historical corporate income tax rate (34 percent) and the newly enacted 21 percent corporate income tax rate. The reclassification is as of March 31, 2018; no prior period information has been retroactively adjusted as a result of implementing the ASU.

Post-Retirement Benefits (Table

Post-Retirement Benefits (Tables)	9 Months Ended
	Mar. 31, 2019
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 and nine months ended March 31, 2019 and 2018 (in thousands): Three Months Ended Three Months Ended March 31, 2019 March 31, 2018 Defined Benefit Plan Supplemental Retirement Plans Defined Benefit Plan Supplemental Retirement Plans Service cost $ - $ 78 $ - $ 149 Interest cost 250 36 242 26 Expected return on plan assets (513 ) - (505 ) - Amortization of prior net loss 145 9 - - Amortization of prior service cost - - 182 10 Net periodic (benefit) cost $ (118 ) $ 123 $ (81 ) $ 185 Nine Months Ended Nine Months Ended March 31, 2019 March 31, 2018 Defined Benefit Plan Supplemental Retirement Plan Defined Benefit Plan Supplemental Retirement Plan Service cost $ - $ 373 $ - $ 369 Interest cost 750 88 726 76 Expected return on plan assets (1,539 ) - (1,511 ) - Amortization of prior net loss 435 27 544 26 Amortization of prior service cost - - - - Net periodic (benefit) cost $ (354 ) $ 488 $ (241 ) $ 471
Shares Held by ESOP	Shares held by the ESOP include the following (dollars in thousands): March 31, 2019 June 30, 2018 Allocated to participants 216,854 144,923 Unearned 1,236,355 1,308,286 Total ESOP shares 1,453,209 1,453,209 Fair value of unearned shares $ 24,647 $ 25,996

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Mar. 31, 2019
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 March 31, 2019 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 49,612 $ - $ 49,612 Corporate and other debt securities - 8,316 - 8,316 Mortgage-backed securities – residential - 28,086 - 28,086 Derivatives – interest rate contracts - 526 - 526 Total assets at fair value $ - $ 86,540 $ - $ 86,540 Derivatives – interest rate contracts $ - $ 526 $ - $ 526 Total liabilities at fair value $ - $ 526 $ - $ 526 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 698 $ 698 Commercial loans - - 28 28 Home equity lines of credit - - 80 80 Foreclosed real estate - - 653 653 Total assets at fair value $ - $ - $ 1,459 $ 1,459 Fair Value Measurements Level 1 Level 2 Level 3 Total June 30, 2018 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 63,430 $ - $ 63,430 Corporate and other debt securities - 8,235 - 8,235 Mortgage-backed securities – residential - 33,807 - 33,807 Total assets at fair value $ - $ 105,472 $ - $ 105,472 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 688 $ 688 Construction - - 1,984 1,984 Commercial loans - - 845 845 Home equity lines of credit - - 7 7 Foreclosed real estate - - 460 460 Total assets at fair value $ - $ - $ 3,984 $ 3,984
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 March 31, 2019 and June 30, 2018 (dollars in thousands): Valuation Unobservable Range or Fair Value Technique(s) Input(s) Rate Used March 31, 2019: Impaired loans - residential mortgages $ 698 Discounted cash flow Discount rate 5.4% to 6.3% Sales comparison Adjustments for differences in sales comparables -24.3% to -10.2% Impaired loans - commercial loans 28 Discounted cash flow Discount rate 7.0% Impaired loans - home equity lines of credit 80 Discounted cash flow Discount rate 6.3% Sales comparison Adjustments for differences in sales comparables -24.3% to -10.2% Foreclosed real estate 653 Sales comparison Adjustments for differences in sales comparables -8.0% to 45.0% June 30, 2018: Impaired loans - residential mortgages $ 688 Sales comparison Adjustments for differences in sales comparables -5.1% to 20.9% Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - construction 1,984 Sales contract Discount to sales contract 9.8% Impaired loans - commercial loans 845 Discounted cash flow Discount rate 5.3% to 7.5% Sales contract Discount to sales contract 9.8% Impaired loans - home equity lines of credit 7 Sales comparison Adjustments for differences in sales comparables -5.1% to 20.9% Discounted cash flow Discount rate 6.3% Foreclosed real estate 460 Sales comparison Adjustments for differences in sales comparables -8.1% to -0.4%
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 March 31, 2019: Financial assets: Cash and cash equivalents $ 87,105 $ 87,105 $ - $ - $ 87,105 Investment securities held to maturity 354,000 - 351,184 - 351,184 Investment securities available for sale 86,014 - 86,014 - 86,014 Loans receivable, net 935,680 - - 923,683 923,683 Accrued interest receivable 5,037 - 1,694 3,343 5,037 Federal Home Loan Bank stock 2,384 N/A N/A N/A N/A Derivative assets - interest rate contracts 526 - 526 - 526 Financial liabilities: Demand, NOW, money market deposits and savings accounts 774,999 774,999 - - 774,999 Time deposits 427,194 - 431,302 - 431,302 Mortgage escrow funds 7,675 7,675 - - 7,675 FHLB advances 26,248 - 26,537 - 26,537 Derivative liabilities - interest rate contracts 526 - 526 - 526 June 30, 2018: Financial assets: Cash and cash equivalents $ 62,145 $ 62,145 $ - $ - $ 62,145 Investment securities held to maturity 353,183 - 343,188 - 343,188 Investment securities available for sale 105,472 - 105,472 - 105,472 Loans receivable, net 902,336 - - 882,319 882,319 Accrued interest receivable 4,358 - 1,402 2,956 4,358 Federal Home Loan Bank stock 2,050 N/A N/A N/A N/A Financial liabilities: Demand, NOW, money market deposits and savings accounts 765,084 765,084 - - 765,084 Time deposits 392,373 - 394,205 - 394,205 Mortgage escrow funds 8,803 8,803 - - 8,803 FHLB advances 18,841 - 20,574 - 20,574

Regulatory Capital (Tables)

Regulatory Capital (Tables)	9 Months Ended
	Mar. 31, 2019
Banking And Thrift [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 March 31, 2019 and June 30, 2018, compared to the required ratios for minimum capital adequacy and for classification as well capitalized (dollars in thousands). As a result of the Economic Growth, Regulatory Relief, and Consumer Protection Act passed by Congress in 2018, the Company is no longer subject to consolidated capital requirements, as the Company’s total consolidated assets do not exceed $3 billion, and thus the consolidated capital ratios are no longer required to be disclosed in the financial statements. To Be Well Capitalized Under Prompt For Capital Adequacy Corrective Action Bank Actual Purposes Provisions Amount Ratio Amount Ratio Amount Ratio March 31, 2019: PCSB Bank Leverage (Tier 1) $ 207,968 13.7 % $ 60,687 4.0 % $ 75,859 5.0 % Risk-based: Common Tier 1 207,968 20.5 45,712 4.5 66,028 6.5 Tier 1 207,968 20.5 60,949 6.0 81,265 8.0 Total 212,913 21.0 81,265 8.0 101,581 10.0 June 30, 2018: PCSB Bank Leverage (Tier 1) $ 200,488 13.6 % $ 58,924 4.0 % $ 73,655 5.0 % Risk-based: Common Tier 1 200,488 21.1 42,745 4.5 61,743 6.5 Tier 1 200,488 21.1 56,994 6.0 75,991 8.0 Total 205,392 21.6 75,991 8.0 94,989 10.0

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	The following table provides factors used in the earnings per share computation for the three and nine months ended March 31, 2019 and 2018. Three Months Ended March 31, Nine Months Ended March 31, 2019 2018 2019 2018 (amounts in thousands, except share and per share data) Net income applicable to common stock $ 1,986 $ 2,177 $ 6,639 $ 3,935 Average number of common shares outstanding 17,451,763 18,165,110 17,917,077 18,165,110 Less: Average unallocated ESOP shares 1,247,370 1,344,384 1,271,790 1,375,979 Average number of common share soutstanding used to calculate basic earnings per common share 16,204,393 16,820,726 16,645,287 16,789,131 Effect of equity-based awards 57,362 - 14,459 - Average number of common shares outstanding used to calculate diluted earnings per common share 16,261,755 16,820,726 16,659,746 16,789,131 Earnings per common share: Basic $ 0.12 $ 0.13 $ 0.40 $ 0.23 Diluted $ 0.12 $ 0.13 $ 0.40 $ 0.23

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	9 Months Ended
	Mar. 31, 2019
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 March 31, 2019: March 31, (dollars in thousands) 2019 Notional amounts $ 16,525 Weighted average pay rates 4.39 % Weighted average receive rates 4.39 % Weighted average maturity 9.58 years Fair value of combined interest rate swaps $ -

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Mar. 31, 2019
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 March 31, 2019. Number of Shares Weighted-Average Grant Date Fair Value Unvested allocated shares outstanding at July 1, 2018 - $ - Shares granted 547,185 19.02 Shares vested - - Shares forfeited - - Unvested allocated shares at March 31, 2019 547,185 $ -
Fair Value of Option Granted Using Weighted-Average Assumptions	The fair value of options granted during the current year was determined using the following weighted-average assumptions as of grant date. Risk-free interest rate 3.03 % Expected term 6.50 Expected stock price volatility 18.26 % Dividend yield 0.63 % Weighted average fair value of options granted $ 4.61
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, 2018 - $ - $ - Options granted 1,339,293 19.04 Options expired - - Options exercised - - Options outstanding at March 31, 2019 1,339,293 $ 19.04 9.6 $ 715 Fully vested and expected to vest 1,339,293 $ 19.04 9.6 $ 715 Exercisable at March 31, 2019 - $ - $ -

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Mar. 31, 2019Subsidiary
Basis Of Presentation [Abstract]
Number of subsidiaries	2

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
ASU 2017-07 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Non-service cost credits included in other operating expense	$ 73,000	$ 45,000	$ 239,000	$ 139,000

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	Mar. 31, 2019	Jun. 30, 2018
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	$ 86,901	$ 107,414
Available for sale, Gross Unrealized/Unrecognized Gains	45	81
Available for sale, Gross Unrealized/Unrecognized Losses	(932)	(2,023)
Available for sale, Fair Value	86,014	105,472
Held to maturity, Amortized Cost	354,000	353,183
Held to maturity, Gross Unrealized/Unrecognized Gains	731	43
Held to maturity, Gross Unrealized/Unrecognized Losses	(3,547)	(10,038)
Held to maturity, Fair Value	351,184	343,188
U.S. Government and Agency Obligations [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	49,977	64,389
Available for sale, Gross Unrealized/Unrecognized Gains	36
Available for sale, Gross Unrealized/Unrecognized Losses	(401)	(959)
Available for sale, Fair Value	49,612	63,430
Held to maturity, Amortized Cost	106,544	122,048
Held to maturity, Gross Unrealized/Unrecognized Gains	84
Held to maturity, Gross Unrealized/Unrecognized Losses	(882)	(2,274)
Held to maturity, Fair Value	105,746	119,774
Corporate and Other Debt Securities [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	8,364	8,406
Available for sale, Gross Unrealized/Unrecognized Losses	(48)	(171)
Available for sale, Fair Value	8,316	8,235
Held to maturity, Amortized Cost	34,035	4,000
Held to maturity, Gross Unrealized/Unrecognized Gains	229
Held to maturity, Gross Unrealized/Unrecognized Losses	(122)	(126)
Held to maturity, Fair Value	34,142	3,874
Mortgage-backed Securities - Residential [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	28,560	34,619
Available for sale, Gross Unrealized/Unrecognized Gains	9	81
Available for sale, Gross Unrealized/Unrecognized Losses	(483)	(893)
Available for sale, Fair Value	28,086	33,807
Held to maturity, Amortized Cost	135,352	140,478
Held to maturity, Gross Unrealized/Unrecognized Gains	225	32
Held to maturity, Gross Unrealized/Unrecognized Losses	(1,647)	(4,846)
Held to maturity, Fair Value	133,930	135,664
Mortgage-backed Securities - Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Held to maturity, Amortized Cost	49,538	53,547
Held to maturity, Gross Unrealized/Unrecognized Gains	54
Held to maturity, Gross Unrealized/Unrecognized Losses	(698)	(1,815)
Held to maturity, Fair Value	48,894	51,732
Mortgage-backed Securities - Commercial [Member]
Schedule of Investments [Line Items]
Held to maturity, Amortized Cost	28,531	33,110
Held to maturity, Gross Unrealized/Unrecognized Gains	139	11
Held to maturity, Gross Unrealized/Unrecognized Losses	(198)	(977)
Held to maturity, Fair Value	$ 28,472	$ 32,144

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Mar. 31, 2019USD ($)Security	Mar. 31, 2018USD ($)	Mar. 31, 2019USD ($)Security	Mar. 31, 2018USD ($)	Jun. 30, 2018USD ($)Security
Schedule of Investments [Line Items]
Sale of investment securities	$ 0	$ 0	$ 2,100,000	$ 6,600,000
Realized gains or losses on investment securities			55,000	173,000
Disposal of securities held to maturity				681,000
Realized gains from sale of securities held to maturity				$ 34,000
Carrying amounts of securities pledged	112,200,000		112,200,000		$ 140,500,000
Total investment securities	$ 440,014,000		$ 440,014,000		$ 458,655,000
Number of securities in unrealized loss position | Security	205		205		254
Fair value of securities in unrealized loss position	$ 351,600,000		$ 351,600,000		$ 438,500,000
Other-than-temporarily impaired securities | Security	0		0		0
Minimum [Member]
Schedule of Investments [Line Items]
Held to maturity substantial portion of principal outstanding percentage			85.00%

Investment Securities - Fair Va

Investment Securities - Fair Value and Carrying Amount of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Investments Debt And Equity Securities [Abstract]
Held to maturity, carrying amount, 1 year or less	$ 27,550
Held to maturity, carrying amount, 1 to 5 years	83,994
Held to maturity, carrying amount, 5 to 10 years	25,035
Held to maturity, carrying amount, Mortgage-backed securities and other	217,421
Held to maturity, Amortized Cost	354,000	$ 353,183
Held to maturity, fair value, 1 year or less	27,389
Held to maturity, fair value, 1 to 5 years	83,419
Held to maturity, fair value, 5 to 10 years	25,155
Held to maturity, fair value, Mortgage-backed securities and other	215,221
Held to maturity, fair value, Total	351,184	343,188
Available for sale, amortized cost, 1 year or less	18,007
Available for sale, amortized cost, 1 to 5 years	40,334
Available for sale, amortized cost, Mortgage-backed securities and other	28,560
Available for sale, Amortized Cost	86,901	107,414
Available for sale, fair value, 1 year or less	17,907
Available for sale, fair value, 1 to 5 years	40,021
Available for sale, fair value, Mortgage-backed securities and other	28,086
Available for sale, fair value, Total	$ 86,014	$ 105,472

Investment Securities - Investm

Investment Securities - Investment Securities with Fair Value and Unrealized Losses (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Schedule of Investments [Line Items]
Available for sale, Less than 12 months, Fair Value		$ 61,417
Available for sale, Less than 12 months, Unrealized/Unrecognized Loss		(1,096)
Available for sale, 12 months or greater, Fair Value	$ 78,779	38,363
Available for sale, 12 months or greater, Unrealized/Unrecognized Loss	(932)	(927)
Available for sale, Total, Fair Value	78,779	99,780
Available for sale, Total, Unrealized/Unrecognized Loss	(932)	(2,023)
Held to maturity, Less than 12 months, Fair Value	2,453	205,419
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(47)	(5,801)
Held to maturity, 12 months or greater, Fair Value	270,318	133,338
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(3,500)	(4,237)
Held to maturity, Total, Fair Value	272,771	338,757
Held to maturity, Total, Unrealized/ Unrecognized Loss	(3,547)	(10,038)
U.S. Government and Agency Obligations [Member]
Schedule of Investments [Line Items]
Available for sale, Less than 12 months, Fair Value		41,762
Available for sale, Less than 12 months, Unrealized/Unrecognized Loss		(569)
Available for sale, 12 months or greater, Fair Value	44,657	21,668
Available for sale, 12 months or greater, Unrealized/Unrecognized Loss	(401)	(390)
Available for sale, Total, Fair Value	44,657	63,430
Available for sale, Total, Unrealized/Unrecognized Loss	(401)	(959)
Held to maturity, Less than 12 months, Fair Value		46,163
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss		(871)
Held to maturity, 12 months or greater, Fair Value	95,669	71,611
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(882)	(1,403)
Held to maturity, Total, Fair Value	95,669	117,774
Held to maturity, Total, Unrealized/ Unrecognized Loss	(882)	(2,274)
Corporate and Other Debt Securities [Member]
Schedule of Investments [Line Items]
Available for sale, Less than 12 months, Fair Value		6,258
Available for sale, Less than 12 months, Unrealized/Unrecognized Loss		(148)
Available for sale, 12 months or greater, Fair Value	8,316	1,977
Available for sale, 12 months or greater, Unrealized/Unrecognized Loss	(48)	(23)
Available for sale, Total, Fair Value	8,316	8,235
Available for sale, Total, Unrealized/Unrecognized Loss	(48)	(171)
Held to maturity, Less than 12 months, Fair Value	2,453	3,874
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(47)	(126)
Held to maturity, 12 months or greater, Fair Value	3,925
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(75)
Held to maturity, Total, Fair Value	6,378	3,874
Held to maturity, Total, Unrealized/ Unrecognized Loss	(122)	(126)
Mortgage-backed Securities - Residential [Member]
Schedule of Investments [Line Items]
Available for sale, Less than 12 months, Fair Value		13,397
Available for sale, Less than 12 months, Unrealized/Unrecognized Loss		(379)
Available for sale, 12 months or greater, Fair Value	25,806	14,718
Available for sale, 12 months or greater, Unrealized/Unrecognized Loss	(483)	(514)
Available for sale, Total, Fair Value	25,806	28,115
Available for sale, Total, Unrealized/Unrecognized Loss	(483)	(893)
Held to maturity, Less than 12 months, Fair Value		102,496
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss		(3,338)
Held to maturity, 12 months or greater, Fair Value	111,881	32,490
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(1,647)	(1,508)
Held to maturity, Total, Fair Value	111,881	134,986
Held to maturity, Total, Unrealized/ Unrecognized Loss	(1,647)	(4,846)
Mortgage-backed Securities - Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Held to maturity, Less than 12 months, Fair Value		31,124
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss		(884)
Held to maturity, 12 months or greater, Fair Value	40,744	20,608
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(698)	(931)
Held to maturity, Total, Fair Value	40,744	51,732
Held to maturity, Total, Unrealized/ Unrecognized Loss	(698)	(1,815)
Mortgage-backed Securities - Commercial [Member]
Schedule of Investments [Line Items]
Held to maturity, Less than 12 months, Fair Value		21,762
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss		(582)
Held to maturity, 12 months or greater, Fair Value	18,099	8,629
Held to maturity, 12 months or greater, Unrealized/ Unrecognized Loss	(198)	(395)
Held to maturity, Total, Fair Value	18,099	30,391
Held to maturity, Total, Unrealized/ Unrecognized Loss	$ (198)	$ (977)

Loans Receivable - Summary of L

Loans Receivable - Summary of Loans Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	$ 939,054		$ 905,470
Loans receivable	940,625		907,240
Allowance for loan losses	(4,945)	$ (4,943)	(4,904)	$ (4,624)	$ (4,471)	$ (5,150)
Loans receivable, net	935,680		902,336
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	261,970		250,578
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	499,284		495,265
Allowance for loan losses	(3,235)		(3,073)
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	16,302		17,352
Allowance for loan losses	(200)		(505)
Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	126,514		104,135
Allowance for loan losses	(951)		(780)
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	34,525		37,395
Allowance for loan losses	(74)		(80)
Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	459		745
Allowance for loan losses	(7)		(7)
Mortgage Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Net deferred loan origination costs	843		1,041
Loans receivable	778,399		764,236
Commercial and Consumer Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Net deferred loan origination costs	728		729
Loans receivable	$ 162,226		$ 143,004

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		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	$ 4,943	$ 4,471	$ 4,904	$ 5,150
Allowance for Loan Losses, Provision (credit)	7	54	71	389
Allowance for Loan Losses, Charge-offs	(11)	(130)	(141)	(1,144)
Allowance for Loan Losses, Recoveries	6	229	111	229
Allowance for Loan Losses, Ending Allowance	4,945	4,624	4,945	4,624
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance			3,073
Allowance for Loan Losses, Ending Allowance	3,235		3,235
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance			505
Allowance for Loan Losses, Ending Allowance	200		200
Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance			780
Allowance for Loan Losses, Ending Allowance	951		951
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance			80
Allowance for Loan Losses, Ending Allowance	74		74
Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance			7
Allowance for Loan Losses, Ending Allowance	7		7
Originated [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	379	402	386	360
Allowance for Loan Losses, Provision (credit)	8	(20)	(4)	39
Allowance for Loan Losses, Charge-offs		(47)		(64)
Allowance for Loan Losses, Recoveries	2		7
Allowance for Loan Losses, Ending Allowance	389	335	389	335
Originated [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	3,261	2,686	3,073	2,589
Allowance for Loan Losses, Provision (credit)	(26)	131	276	228
Allowance for Loan Losses, Charge-offs			(114)
Allowance for Loan Losses, Ending Allowance	3,235	2,817	3,235	2,817
Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	258	400	505	1,150
Allowance for Loan Losses, Provision (credit)	(58)	90	(401)	337
Allowance for Loan Losses, Charge-offs				(997)
Allowance for Loan Losses, Recoveries			96
Allowance for Loan Losses, Ending Allowance	200	490	200	490
Originated [Member] | Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	880	844	780	949
Allowance for Loan Losses, Provision (credit)	69	(186)	169	(291)
Allowance for Loan Losses, Charge-offs		(23)		(23)
Allowance for Loan Losses, Recoveries	2	210	2	210
Allowance for Loan Losses, Ending Allowance	951	845	951	845
Originated [Member] | Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	82	74	80	76
Allowance for Loan Losses, Provision (credit)	(8)	35	(6)	33
Allowance for Loan Losses, Charge-offs		(60)		(60)
Allowance for Loan Losses, Recoveries		19		19
Allowance for Loan Losses, Ending Allowance	74	68	74	68
Originated [Member] | Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	10
Allowance for Loan Losses, Provision (credit)	6	4
Allowance for Loan Losses, Charge-offs	(11)
Allowance for Loan Losses, Recoveries	2
Allowance for Loan Losses, Ending Allowance	7	4	7	4
Originated [Member] | Consumer And Installment Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance			7
Allowance for Loan Losses, Provision (credit)			21	4
Allowance for Loan Losses, Charge-offs			(27)
Allowance for Loan Losses, Recoveries			6
Allowance for Loan Losses, Ending Allowance	7	4	7	4
Acquired [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	73	65	73	26
Allowance for Loan Losses, Provision (credit)	16		16	39
Allowance for Loan Losses, Ending Allowance	$ 89	$ 65	$ 89	$ 65

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	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	$ 5,770		$ 9,114
Loans, Collectively Evaluated for Impairment	930,374		893,406
Total	939,054		905,470
Allowance for Loan Losses, Individually Evaluated for Impairment	141		451
Allowance for Loan Losses, Collectively Evaluated for Impairment	4,715		4,380
Allowance for Loan Losses, Total	4,945	$ 4,943	4,904	$ 4,624	$ 4,471	$ 5,150
Originated And Acquired Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Total	4,945		4,904
Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	2,910		2,950
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	89		73
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	1,785		2,360
Loans, Collectively Evaluated for Impairment	258,905		246,913
Total	261,970		250,578
Allowance for Loan Losses, Individually Evaluated for Impairment	132		154
Allowance for Loan Losses, Collectively Evaluated for Impairment	257		232
Residential [Member] | Originated And Acquired Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Total	478		459
Residential [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	1,280		1,305
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	89		73
Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	1,403		1,683
Loans, Collectively Evaluated for Impairment	496,410		492,105
Total	499,284		495,265
Allowance for Loan Losses, Collectively Evaluated for Impairment	3,235		3,073
Allowance for Loan Losses, Total	3,235		3,073
Commercial [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	1,471		1,477
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	0		0
Construction [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment			2,260
Loans, Collectively Evaluated for Impairment	16,302		15,092
Total	16,302		17,352
Allowance for Loan Losses, Individually Evaluated for Impairment			276
Allowance for Loan Losses, Collectively Evaluated for Impairment	200		229
Allowance for Loan Losses, Total	200		505
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	1,883		2,451
Loans, Collectively Evaluated for Impairment	124,631		101,684
Total	126,514		104,135
Allowance for Loan Losses, Individually Evaluated for Impairment	2		9
Allowance for Loan Losses, Collectively Evaluated for Impairment	949		771
Allowance for Loan Losses, Total	951		780
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	699		360
Loans, Collectively Evaluated for Impairment	33,667		36,867
Total	34,525		37,395
Allowance for Loan Losses, Individually Evaluated for Impairment	7		12
Allowance for Loan Losses, Collectively Evaluated for Impairment	67		68
Allowance for Loan Losses, Total	74		80
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	159		168
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	459		745
Total	459		745
Allowance for Loan Losses, Collectively Evaluated for Impairment	7		7
Allowance for Loan Losses, Total	$ 7		$ 7

Loans Receivable - Summary of_2

Loans Receivable - Summary of Loans Individually Evaluated for Impairment (Excluding Loans Acquired with Deteriorated Credit Quality) by Class of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Financing Receivable Impaired [Line Items]
Impaired loans, unpaid principal balance	$ 9,215	$ 10,455
Impaired loans, recorded investment	5,770	9,114
Allowance for loan losses	141	451
Residential [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	1,064	1,659
Impaired loans with no related allowance recorded, recorded investment	1,037	1,576
Impaired loans with a related allowance recorded, unpaid principal balance	726	742
Impaired loans with a related allowance recorded, recorded investment	748	784
Impaired loans, recorded investment	1,785	2,360
Allowance for loan losses	132	154
Commercial [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	1,481	1,765
Impaired loans with no related allowance recorded, recorded investment	1,403	1,683
Impaired loans, recorded investment	1,403	1,683
Commercial Loans [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	5,146	2,254
Impaired loans with no related allowance recorded, recorded investment	1,853	2,098
Impaired loans with a related allowance recorded, unpaid principal balance	30	353
Impaired loans with a related allowance recorded, recorded investment	30	353
Impaired loans, recorded investment	1,883	2,451
Allowance for loan losses	2	9
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	679	341
Impaired loans with no related allowance recorded, recorded investment	613	341
Impaired loans with a related allowance recorded, unpaid principal balance	89	84
Impaired loans with a related allowance recorded, recorded investment	86	19
Impaired loans, recorded investment	699	360
Allowance for loan losses	$ 7	12
Construction [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with a related allowance recorded, unpaid principal balance		3,257
Impaired loans with a related allowance recorded, recorded investment		2,260
Impaired loans, recorded investment		2,260
Allowance for loan losses		$ 276

Loans Receivable - Summary of_3

Loans Receivable - Summary of Average Recorded Investment and Interest Income Recognized on Loans Individually Evaluated for Impairment, by Class of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable Impaired [Line Items]
Impaired loans average recorded investment	$ 6,079	$ 12,835	$ 7,779	$ 14,943
Impaired loans interest income recognized	66	136	216	591
Residential [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	1,317	2,776	1,516	3,360
Impaired loans with no related allowance recorded, interest income recognized	9	13	20	179
Impaired loans with a related allowance recorded, average recorded investment	750	452	752	454
Impaired loans with a related allowance recorded, interest income recognized	4	4	11	11
Commercial [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	1,408	2,440	1,494	2,447
Impaired loans with no related allowance recorded, interest income recognized	11	37	37	91
Construction [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment			2,131	121
Impaired loans with no related allowance recorded, interest income recognized			138	17
Impaired loans with a related allowance recorded, average recorded investment		2,260	1,130	2,858
Commercial Loans [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	1,862	3,027	628	3,704
Impaired loans with no related allowance recorded, interest income recognized	42	68	9	228
Impaired loans with a related allowance recorded, average recorded investment	39	1,417	40	1,439
Impaired loans with a related allowance recorded, interest income recognized		14	1	45
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	616	452		549
Impaired loans with no related allowance recorded, interest income recognized				20
Impaired loans with a related allowance recorded, average recorded investment	$ 87	$ 11	$ 88	$ 11

Loans Receivable - Nonaccrual L

Loans Receivable - Nonaccrual Loans and in Loans Past Due over 90 Days Still on Accrual Status by Class of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 2,846	$ 6,102
Originated [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	541	604
Originated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		262
Originated [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		2,260
Originated [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	273	788
Originated [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	391	45
Acquired [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	802	1,308
Acquired [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	543	532
Acquired [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 296	$ 303

Loans Receivable - Additional I

Loans Receivable - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Mar. 31, 2019USD ($)Loan	Mar. 31, 2018Loan	Mar. 31, 2019USD ($)Loan	Mar. 31, 2018USD ($)Loan	Jun. 30, 2018USD ($)Loan
Loans and Leases Receivable Disclosure [Line Items]
Number of loans classified as troubled debt restructurings | Loan	12		12		12
Value of loans classified as troubled debt restructurings | $	$ 3,500,000		$ 3,500,000		$ 3,800,000
Specific reserves | $	$ 129,000		$ 129,000		139,000
Troubled debt restructurings, number of modified loans | Loan	0	0	2	0
Troubled debt restructurings with carrying amount | $			$ 428,000	$ 1,100,000
Troubled debt restructurings for which there was a payment default | Loan	0	0	0	2
Increase allowance for loan loss | $				$ 2,000
Troubled debt restructurings for which there was a payment default cured | Loan				1
Troubled debt restructurings with carrying amount cured | $				$ 807,000
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Troubled debt restructurings, number of modified loans | Loan			1
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Troubled debt restructurings, number of modified loans | Loan			1
90 Days or More Past Due [Member]
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans accounted for as purchased credit impaired loans | $	$ 1,100,000		$ 1,100,000		$ 1,100,000

Loans Receivable - Aging of Rec

Loans Receivable - Aging of Recorded Investment in Past Due Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 3,433	$ 7,147
Current	935,621	898,323
Total	939,054	905,470
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	158	30
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	70	626
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,205	6,491
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	261,970	250,578
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	499,284	495,265
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	16,302	17,352
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	126,514	104,135
Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	34,525	37,395
Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	459	745
Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	936	3,671
Current	824,637	766,209
Total	825,573	769,880
Originated [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	158
Originated [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1	394
Originated [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	777	3,277
Originated [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	461	604
Current	212,028	194,986
Total	212,489	195,590
Originated [Member] | Residential [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		394
Originated [Member] | Residential [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	461	210
Originated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		262
Current	440,114	420,320
Total	440,114	420,582
Originated [Member] | Commercial [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		262
Originated [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,260
Current	16,302	15,092
Total	16,302	17,352
Originated [Member] | Construction [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,260
Originated [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	158	500
Current	126,169	102,767
Total	126,327	103,267
Originated [Member] | Commercial Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	158
Originated [Member] | Commercial Loans [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		500
Originated [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	316	45
Current	29,581	32,311
Total	29,897	32,356
Originated [Member] | Home Equity Lines Of Credit [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	316	45
Originated [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1
Current	443	733
Total	444	733
Originated [Member] | Consumer and Overdrafts [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1
Acquired [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,497	3,476
Current	110,984	132,114
Total	113,481	135,590
Acquired [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		30
Acquired [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	69	232
Acquired [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,428	3,214
Acquired [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,010	2,038
Current	48,471	52,950
Total	49,481	54,988
Acquired [Member] | Residential [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		232
Acquired [Member] | Residential [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,010	1,806
Acquired [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,122	1,112
Current	58,048	73,571
Total	59,170	74,683
Acquired [Member] | Commercial [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,122	1,112
Acquired [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	187	868
Total	187	868
Acquired [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	365	326
Current	4,263	4,713
Total	4,628	5,039
Acquired [Member] | Home Equity Lines Of Credit [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		30
Acquired [Member] | Home Equity Lines Of Credit [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	69
Acquired [Member] | Home Equity Lines Of Credit [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	296	296
Acquired [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15	12
Total	$ 15	$ 12

Loans Receivable - Summary of R

Loans Receivable - Summary of Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 939,054	$ 905,470
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	920,335	888,108
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,700	1,984
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,019	15,378
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	261,970	250,578
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	499,284	495,265
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,302	17,352
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	126,514	104,135
Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	34,525	37,395
Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	459	745
Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	825,573	769,880
Originated [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	812,726	758,908
Originated [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,184	882
Originated [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,663	10,090
Originated [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	212,489	195,590
Originated [Member] | Residential [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,771	194,341
Originated [Member] | Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,143	571
Originated [Member] | Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	575	678
Originated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	440,114	420,582
Originated [Member] | Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	439,642	418,370
Originated [Member] | Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	342
Originated [Member] | Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	130	2,212
Originated [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,302	17,352
Originated [Member] | Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,302	15,092
Originated [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans		2,260
Originated [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	126,327	103,267
Originated [Member] | Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	116,129	98,205
Originated [Member] | Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,607	167
Originated [Member] | Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,591	4,895
Originated [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	29,897	32,356
Originated [Member] | Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	29,438	32,167
Originated [Member] | Home Equity Lines Of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	92	144
Originated [Member] | Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	367	45
Originated [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	444	733
Originated [Member] | Consumer and Overdrafts [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	444	733
Acquired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	113,481	135,590
Acquired [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	107,609	129,200
Acquired [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,516	1,102
Acquired [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,356	5,288
Acquired [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	49,481	54,988
Acquired [Member] | Residential [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	47,312	51,858
Acquired [Member] | Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	214	249
Acquired [Member] | Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,955	2,881
Acquired [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	59,170	74,683
Acquired [Member] | Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	56,330	71,832
Acquired [Member] | Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	825	842
Acquired [Member] | Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,015	2,009
Acquired [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	187	868
Acquired [Member] | Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	184	857
Acquired [Member] | Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3	11
Acquired [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,628	5,039
Acquired [Member] | Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,768	4,641
Acquired [Member] | Home Equity Lines Of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	474
Acquired [Member] | Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	386	398
Acquired [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	15	12
Acquired [Member] | Consumer and Overdrafts [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 15	$ 12

Loans Receivable - Schedule of

Loans Receivable - Schedule of Carrying Amount of Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	$ 935,680	$ 902,336
Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	2,821	2,877
Acquired with Deteriorated Credit Quality [Member] | Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	1,191	1,232
Acquired with Deteriorated Credit Quality [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	1,471	1,477
Acquired with Deteriorated Credit Quality [Member] | Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	$ 159	$ 168

Loans Receivable - Schedule o_2

Loans Receivable - Schedule of Carrying Amount of Purchased Credit Impaired Loans (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans, allowance	$ 89	$ 73

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		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]
Beginning balance	$ 219	$ 238	$ 245	$ 403
Accretion income	(14)	(7)	(40)	(59)
Disposals				(113)
Ending balance	$ 205	$ 231	$ 205	$ 231

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended							9 Months Ended
		Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018		Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		$ 288,782	$ 289,877	$ 287,559	$ 282,411		$ 282,085	$ 279,846	$ 287,559	$ 279,846
Total other comprehensive income (loss)		720	478	1	(406)		(348)	(107)	1,199	(861)
Ending Balance		278,316	288,782	289,877	284,660		282,411	282,085	278,316	284,660
Net Unrealized Gain (Loss) on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(1,300)		(1,536)	(669)			37	(1,536)	37
Other comprehensive (loss) income before reclassifications		757			(705)				1,110	(1,635)
Amounts reclassified from accumulated other comprehensive income									(55)	(139)
Less tax effect		(160)			149				(222)	512
Total other comprehensive income (loss)		597			(556)				833	(1,262)
Reclassification of certain tax effects on other comprehensive income	[1]				(132)					(132)
Ending Balance		(703)	(1,300)		(1,357)		(669)		(703)	(1,357)
Unrealized Losses on Retirement Plans [Member] | Pension Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(4,921)		(5,150)	(4,763)			(5,002)	(5,150)	(5,002)
Amounts reclassified from accumulated other comprehensive income		145			182				435	544
Less tax effect		(30)			(39)				(91)	(162)
Total other comprehensive income (loss)		115			143				344	382
Reclassification of certain tax effects on other comprehensive income	[1]				(938)					(938)
Ending Balance		(4,806)	(4,921)		(5,558)		(4,763)		(4,806)	(5,558)
Unrealized Losses on Retirement Plans [Member] | SERP Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(250)		(264)	(238)			(250)	(264)	(250)
Amounts reclassified from accumulated other comprehensive income		9			10				27	26
Less tax effect		(1)			(3)				(5)	(7)
Total other comprehensive income (loss)		8			7				22	19
Reclassification of certain tax effects on other comprehensive income	[1]				(47)					(47)
Ending Balance		(242)	(250)		(278)		(238)		(242)	(278)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(6,471)	(6,949)	(6,950)	(5,670)		(5,322)	(5,215)	(6,950)	(5,215)
Other comprehensive (loss) income before reclassifications		757			(705)				1,110	(1,635)
Amounts reclassified from accumulated other comprehensive income		154			192				407	431
Less tax effect		(191)			107				(318)	343
Total other comprehensive income (loss)		720	478	1	(406)		(348)	(107)	1,199	(861)
Reclassification of certain tax effects on other comprehensive income	[1]				(1,117)	[2]				(1,117)
Ending Balance		$ (5,751)	$ (6,471)	$ (6,949)	$ (7,193)		$ (5,670)	$ (5,322)	$ (5,751)	$ (7,193)
[1]	Represents the impact of adopting ASU 2018-02 requiring the reclassification of certain stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017 from accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 (or portion thereof) is recorded. The amount of the reclassification is the difference between the historical corporate income tax rate (34 percent) and the newly enacted 21 percent corporate income tax rate. The reclassification is as of March 31, 2018; no prior period information has been retroactively adjusted as a result of implementing the ASU.
[2]	The adoption of ASU 2018-02 requires the reclassification from accumulated income to retained earnings of stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017.

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail)	3 Months Ended	6 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Corporate income tax rate	21.00%	34.00%

Post-Retirement Benefits - Addi

Post-Retirement Benefits - Additional Information (Detail) - USD ($)	Mar. 31, 2019	Apr. 20, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
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		$ 0
ESOP shares	1,453,209	1,453,209	1,453,209		1,453,209		1,453,209
Stock price		$ 10
ESOP payable term		15 years
ESOP prime rate percentage	5.50%
ESOP borrowing	$ 12,600,000		$ 12,600,000		$ 12,600,000
Number of shares committed to be released per year through 2032	96,881		96,881		96,881
ESOP Compensation			$ 464,000	$ 478,000	$ 1,434,000	$ 1,757,000

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		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Employee Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 250	$ 242	$ 750	$ 726
Expected return on plan assets	(513)	(505)	(1,539)	(1,511)
Amortization of prior net loss	145		435	544
Amortization of prior service cost		182
Net periodic (benefit) cost	(118)	(81)	(354)	(241)
Supplemental Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	78	149	373	369
Interest cost	36	26	88	76
Amortization of prior net loss	9		27	26
Amortization of prior service cost		10
Net periodic (benefit) cost	$ 123	$ 185	$ 488	$ 471

Post-Retirement Benefits - Shar

Post-Retirement Benefits - Shares Held by ESOP (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018	Apr. 20, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Allocated to participants	216,854	144,923
Unearned	1,236,355	1,308,286
Total ESOP shares	1,453,209	1,453,209	1,453,209
Fair value of unearned shares	$ 24,647	$ 25,996

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value transfers between levels	$ 0	$ 0	$ 0	$ 0
Carrying amount of loans	935,680,000		935,680,000			$ 902,336,000
Remaining valuation allowance	4,945,000	4,624,000	4,945,000	4,624,000	$ 4,943,000	4,904,000	$ 4,471,000	$ 5,150,000
Net charge-offs	11,000	130,000	141,000	1,144,000
Provision for loan losses	7,000	$ 54,000	71,000	389,000
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of loans	945,000		945,000			3,900,000
Remaining valuation allowance	$ 141,000		141,000			$ 451,000
Net charge-offs			0	1,100,000
Provision for loan losses			$ 9,000	$ 201,000
Minimum [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.10		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		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	Mar. 31, 2019	Jun. 30, 2018
Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 86,540	$ 105,472
Total liabilities at fair value	526
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	49,612	63,430
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	8,316	8,235
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	28,086	33,807
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	1,459	3,984
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	698	688
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	28	845
Impaired Loans [Member] | Construction [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		1,984
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	80	7
Foreclosed Real Estate [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	653	460
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	526
Total liabilities at fair value	526
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	86,540	105,472
Total liabilities at fair value	526
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	49,612	63,430
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	8,316	8,235
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	28,086	33,807
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	526
Total liabilities at fair value	526
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	1,459	3,984
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	698	688
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	28	845
Level 3 [Member] | Impaired Loans [Member] | Construction [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		1,984
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	80	7
Level 3 [Member] | Foreclosed Real Estate [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	$ 653	$ 460

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	Mar. 31, 2019USD ($)	Jun. 30, 2018USD ($)
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	$ 1,459	$ 3,984
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	1,459	3,984
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	698	688
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	698	688
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	698
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Residential [Member] | Level 3 [Member] | Sales Comparison [Member] | Adjustments for Differences in Sales Comparables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		688
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		1,984
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Construction [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		$ 1,984
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]		pcsb:ValuationTechniqueSalesContractMember
Debt Securities, Available-for-sale, Measurement Input [Extensible List]		pcsb:MeasurementInputAdjustmentsForDifferencesInSalesComparablesMember
Range or Rate Used		0.098
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	28	$ 845
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	$ 28	845
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	us-gaap:MeasurementInputDiscountRateMember
Range or Rate Used	0.070
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		$ 845
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Commercial Loans [Member] | Level 3 [Member] | Sales Contract [Member] | Measurement Input Discount To Sales Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used		0.098
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	$ 80	$ 7
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	80	$ 7
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	$ 80
Range or Rate Used	0.063	0.063
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Home Equity Lines Of Credit [Member] | Level 3 [Member] | Sales Comparison [Member] | Adjustments for Differences in Sales Comparables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		$ 7
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] | Residential [Member] | Level 3 [Member] | Sales Comparison [Member] | Adjustments for Differences in Sales Comparables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	(0.243)	(0.051)
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		0.053
Measured on a Non-Recurring Basis [Member] | Impaired Loans [Member] | Minimum [Member] | Home Equity Lines Of Credit [Member] | Level 3 [Member] | Sales Comparison [Member] | Adjustments for Differences in Sales Comparables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	(0.243)	(0.051)
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] | Residential [Member] | Level 3 [Member] | Sales Comparison [Member] | Adjustments for Differences in Sales Comparables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.102	0.209
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] | Sales Comparison [Member] | Adjustments for Differences in Sales Comparables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.102	0.209
Measured on a Non-Recurring Basis [Member] | Foreclosed Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 653	$ 460
Measured on a Non-Recurring Basis [Member] | Foreclosed Real Estate [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 653	$ 460
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	pcsb:ValuationTechniqueSalesComparisonMember	pcsb:ValuationTechniqueSalesComparisonMember
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	us-gaap:MeasurementInputComparabilityAdjustmentMember	us-gaap:MeasurementInputComparabilityAdjustmentMember
Measured on a Non-Recurring Basis [Member] | Foreclosed Real Estate [Member] | Minimum [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	(0.080)	(0.081)
Measured on a Non-Recurring Basis [Member] | Foreclosed Real Estate [Member] | Maximum [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range or Rate Used	0.450	(0.004)

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	Mar. 31, 2019	Jun. 30, 2018
Financial assets:
Investment securities held to maturity	$ 351,184	$ 343,188
Investment securities available for sale	86,014	105,472
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	87,105	62,145
Investment securities held to maturity	354,000	353,183
Investment securities available for sale	86,014	105,472
Loans receivable, net	935,680	902,336
Accrued interest receivable	5,037	4,358
Federal Home Loan Bank stock	2,384	2,050
Financial liabilities:
Mortgage escrow funds	7,675	8,803
FHLB advances	26,248	18,841
Carrying Amount [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	526
Financial liabilities:
Derivative liabilities - interest rate contracts	526
Carrying Amount [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	774,999	765,084
Carrying Amount [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	427,194	392,373
Total [Member]
Financial assets:
Cash and cash equivalents	87,105	62,145
Investment securities held to maturity	351,184	343,188
Investment securities available for sale	86,014	105,472
Loans receivable, net	923,683	882,319
Accrued interest receivable	5,037	4,358
Financial liabilities:
Mortgage escrow funds	7,675	8,803
FHLB advances	26,537	20,574
Total [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	526
Financial liabilities:
Derivative liabilities - interest rate contracts	526
Total [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	774,999	765,084
Total [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	431,302	394,205
Level 1 [Member]
Financial assets:
Cash and cash equivalents	87,105	62,145
Financial liabilities:
Mortgage escrow funds	7,675	8,803
Level 1 [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	774,999	765,084
Level 2 [Member]
Financial assets:
Investment securities held to maturity	351,184	343,188
Investment securities available for sale	86,014	105,472
Accrued interest receivable	1,694	1,402
Financial liabilities:
FHLB advances	26,537	20,574
Level 2 [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	526
Financial liabilities:
Derivative liabilities - interest rate contracts	526
Level 2 [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	431,302	394,205
Level 3 [Member]
Financial assets:
Loans receivable, net	923,683	882,319
Accrued interest receivable	$ 3,343	$ 2,956

Regulatory Capital - Additional

Regulatory Capital - Additional Information (Detail) - USD ($)	9 Months Ended
	Mar. 31, 2019	Jun. 30, 2018
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total consolidated assets	$ 3,000,000,000
Capital conservation buffer, phase period	4 years
Capital conservation buffer percentage at beginning period	2.50%	1.875%
Minimum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer percentage required under regulatory	2.50%

Regulatory Capital - Summary of

Regulatory Capital - 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] - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Leverage (Tier 1), Bank Actual Amount	$ 207,968	$ 200,488
Common Tier 1, Bank Actual Amount	207,968	200,488
Tier 1, Bank Actual Amount	207,968	200,488
Total, Bank Actual Amount	$ 212,913	$ 205,392
Leverage (Tier 1), Bank Actual Ratio	13.70%	13.60%
Common Tier 1, Bank Actual Ratio	20.50%	21.10%
Tier 1, Bank Actual Ratio	20.50%	21.10%
Total, Bank Actual Ratio	21.00%	21.60%
Leverage (Tier 1), For Capital Adequacy Purposes Amount	$ 60,687	$ 58,924
Common Tier 1, For Capital Adequacy Purposes Amount	45,712	42,745
Tier 1, For Capital Adequacy Purposes Amount	60,949	56,994
Total, For Capital Adequacy Purposes Amount	$ 81,265	$ 75,991
Leverage (Tier 1), For Capital Adequacy Purposes Ratio	4.00%	4.00%
Common Tier 1, For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1, For Capital Adequacy Purposes Ratio	6.00%	6.00%
Total, For Capital Adequacy Purposes Ratio	8.00%	8.00%
Leverage (Tier 1), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 75,859	$ 73,655
Common Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	66,028	61,743
Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	81,265	75,991
Total, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 101,581	$ 94,989
Leverage (Tier 1), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%
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	8.00%	8.00%
Total, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income applicable to common stock	$ 1,986	$ 2,324	$ 2,329	$ 2,177	$ 2	$ 1,756	$ 6,639	$ 3,935
Average number of common shares outstanding	17,451,763			18,165,110			17,917,077	18,165,110
Less: Average unallocated ESOP shares	1,247,370			1,344,384			1,271,790	1,375,979
Average number of common share soutstanding used to calculate basic earnings per common share	16,204,393			16,820,726			16,645,287	16,789,131
Effect of equity-based awards	57,362						14,459
Average number of common shares outstanding used to calculate diluted earnings per common share	16,261,755			16,820,726			16,659,746	16,789,131
Earnings per common share:
Basic	$ 0.12			$ 0.13			$ 0.40	$ 0.23
Diluted	$ 0.12			$ 0.13			$ 0.40	$ 0.23

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Number of dilutive potential common stock equivalents		0		0
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,339,293		1,339,293

Derivatives and Hedging - Addit

Derivatives and Hedging - Additional Information (Detail)	Jun. 30, 2018USD ($)
Interest Rate Swap [Member]
Derivative [Line Items]
Interest rate swaps	$ 0

Derivatives and Hedging - Summa

Derivatives and Hedging - Summary Information About Interest Rate Swaps (Detail)	9 Months Ended
	Mar. 31, 2019USD ($)
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Notional amounts	$ 16,525,000
Weighted average pay rates	4.39%
Weighted average receive rates	4.39%
Weighted average maturity	9 years 6 months 29 days

Revenue From Contracts With C_2

Revenue From Contracts With Customers - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Fees and service charges	$ 436,000	$ 352,000	$ 1,311,000	$ 1,145,000
Revenue from contracts with customers	390,000	335,000	1,200,000	935,000
Fees and Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	295,000	242,000	892,000	649,000
Interchange Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	95,000	93,000	314,000	286,000
Gain/Losses on Sales of Foreclosed Real Estate [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	$ 0	$ 13,000	$ 24,000	$ 27,000

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	Nov. 14, 2018	Oct. 24, 2018	Mar. 31, 2019	Mar. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options granted				1,339,293
Number of other than stock options granted				547,185
Stock-based compensation				$ 1,311,000
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost			$ 5,700,000	$ 5,700,000
Expected weighted-average period for cost recognition				4 years 7 months 6 days
Restricted Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost			9,600,000	$ 9,600,000
Expected weighted-average period for cost recognition				4 years 7 months 6 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	$ 1,300,000
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
Number of additional stock options or time based restricted stock awards authorized	908,254
Vesting period				5 years
Contractual term				10 years
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] | Stock Options [Member] | Non-Employee Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options granted		431,039
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				547,185
Number of additional stock options or time based restricted stock awards authorized	363,301
Vesting period		5 years
Number of shares available for grant			726,604	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
2018 Equity Incentive Plan [Member] | Restricted Stock Awards [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 Awards [Member] | Non-Employee Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of other than stock options granted		183,884

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of RSA activity (Detail)	9 Months Ended
	Mar. 31, 2019$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, granted	547,185
Number of Shares, Unvested allocated shares outstanding ending balance	547,185
Weighted-Average Grant Date Fair Value, Shares granted | $ / shares	$ 19.02

Stock-Based Compensation - Fair

Stock-Based Compensation - Fair Value of Option Granted Using Weighted-Average Assumptions (Detail)	9 Months Ended
	Mar. 31, 2019$ / shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	3.03%
Expected term	6 years 6 months
Expected stock price volatility	18.26%
Dividend yield	0.63%
Weighted average fair value of options granted	$ 4.61

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Activity Related to Stock Options Granted under Plan (Detail) $ / shares in Units, $ in Thousands	9 Months Ended
	Mar. 31, 2019USD ($)$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options, granted | shares	1,339,293
Number of Options, outstanding ending balance | shares	1,339,293
Number of Option, Fully vested and expected to vest | shares	1,339,293
Weighted-Average Exercise Price, Option granted | $ / shares	$ 19.04
Weighted-Average Exercise Price, Option outstanding ending balance | $ / shares	19.04
Weighted-Average Exercise Price, Fully vested and expected to vest | $ / shares	$ 19.04
Weighted-Average Remaining Contractual Years, Option outstanding	9 years 7 months 6 days
Weighted-Average Remaining Contractual Years, Fully vested and expected to vest	9 years 7 months 6 days
Aggregate Intrinsic Value, Option outstanding | $	$ 715
Aggregate Intrinsic Value, Fully vested and expected to vest | $	$ 715