PCSB Financial (PCSB) 10-K 10 Sep 19 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Sep. 06, 2019	Dec. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Trading Symbol	PCSB
Entity Registrant Name	PCSB Financial Corp
Entity Central Index Key	0001691337
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 312.4
Entity Common Stock, Shares Outstanding		17,655,539
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Incorporation, State Country Name	Maryland
Entity File Number	001-38065
Entity Tax Identification Number	814710738
Entity Address, Address Line One	2651 Strang Blvd., Suite 100
Entity Address, City or Town	Yorktown Heights
Entity Address, State or Province	New York
Entity Address, Postal Zip Code	10598
City Area Code	914
Local Phone Number	248-7272

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
ASSETS
Cash and due from banks	$ 58,756	$ 60,684
Federal funds sold	1,273	1,461
Total cash and cash equivalents	60,029	62,145
Investment securities:
Held to maturity investment securities, at amortized cost (fair value of $346,243 and $343,188, respectively)	345,545	353,183
Available for sale securities, at fair value	72,228	105,472
Total investment securities	417,773	458,655
Loans receivable, net of allowance for loan losses of $5,664 and $4,904, respectively	1,093,121	902,336
Accrued interest receivable	4,797	4,358
FHLB stock	6,255	2,050
Premises and equipment, net	11,802	11,598
Deferred tax asset, net	2,478	2,622
Foreclosed real estate	1,158	460
Bank-owned life insurance	24,291	23,747
Goodwill	6,106	6,106
Other intangible assets	323	433
Other assets	9,446	5,677
Total assets	1,637,579	1,480,187
LIABILITIES AND SHAREHOLDERS' EQUITY
Interest bearing deposits	1,084,442	1,025,574
Non-interest bearing deposits	141,379	131,883
Total deposits	1,225,821	1,157,457
Mortgage escrow funds	9,355	8,803
Advances from FHLB	111,216	18,841
Other liabilities	9,880	7,527
Total liabilities	1,356,272	1,192,628
Commitments and contingencies (Notes 1 and 9)
Shareholders' equity:
Preferred stock ($0.01 par value, 10,000,000 shares authorized, no shares issued or outstanding as of June 30, 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 June 30, 2019 and June 30, 2018, respectively)	187	182
Additional paid in capital	182,129	179,045
Retained earnings	134,500	128,365
Unearned compensation - ESOP	(12,114)	(13,083)
Accumulated other comprehensive loss, net of income taxes	(5,090)	(6,950)
Treasury stock, at cost (908,256 shares as of June 30, 2019 and no shares as of June 30, 2018)	(18,305)
Total shareholders' equity	281,307	287,559
Total liabilities and shareholders' equity	$ 1,637,579	$ 1,480,187

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Statement Of Financial Position [Abstract]
Held to maturity investment securities, fair value	$ 346,243	$ 343,188
Allowance for loan losses	$ 5,664	$ 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 ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Interest and dividend income
Loans	$ 41,619,000	$ 37,798,000
Investment securities	10,022,000	9,266,000
Federal funds and other	1,806,000	896,000
Total interest and dividend income	53,447,000	47,960,000
Interest expense
Deposits and escrow interest	10,177,000	5,554,000
FHLB advances	566,000	769,000
Total interest expense	10,743,000	6,323,000
Net interest income	42,704,000	41,637,000
Provision for loan losses	808,000	414,000
Net interest income after provision for loan losses	41,896,000	41,223,000
Noninterest income
Fees and service charges	1,763,000	1,529,000
Bank-owned life insurance	544,000	568,000
Swap income	507,000
Gains on sales of securities	62,000	236,000
Other	226,000	186,000
Total noninterest income	3,102,000	2,519,000
Noninterest expense
Salaries and employee benefits	21,611,000	19,419,000
Occupancy and equipment	5,185,000	5,193,000
Communications and data processing	1,953,000	1,974,000
Professional fees	1,551,000	1,709,000
Postage, printing, stationary and supplies	586,000	578,000
FDIC assessment	421,000	328,000
Advertising	349,000	456,000
Amortization of intangible assets	110,000	126,000
Loss on other receivable	90,000	570,000
Other operating expenses	2,138,000	1,763,000
Total noninterest expense	33,994,000	32,116,000
Net income before income tax expense	11,004,000	11,626,000
Income tax expense	2,686,000	5,022,000
Net income	$ 8,318,000	$ 6,604,000
Earnings per common share:
Basic	$ 0.50	$ 0.39
Diluted	$ 0.50	$ 0.39
Weighted average common shares:
Basic	16,492,760	16,802,894
Diluted	16,527,117	16,802,894

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income	$ 8,318	$ 6,604
Unrealized gains (losses) on available for sale securities:
Net change in unrealized gains/losses before reclassification adjustment	1,741	(1,835)
Reclassification adjustment for gains realized in net income	(62)	(164)
Net change in unrealized gains/losses	1,679	(1,999)
Tax effect	(352)	558
Net of tax	1,327	(1,441)
Defined benefit pension plan and supplemental retirement plans:
Total other comprehensive income (loss)	1,860	(618)
Comprehensive income	10,178	5,986
Pension Benefits [Member]
Defined benefit pension plan and supplemental retirement plans:
Net (loss) gain arising during the period	(486)	335
Reclassification adjustment for amortization of prior service cost and net gain included in net periodic pension cost	1,144	725
Net change in unrealized gains/losses	658	1,060
Tax effect	(139)	(270)
Net of tax	519	790
SERP Benefits [Member]
Defined benefit pension plan and supplemental retirement plans:
Net (loss) gain arising during the period	(19)	10
Reclassification adjustment for amortization of prior service cost and net gain included in net periodic pension cost	36	34
Net change in unrealized gains/losses	17	44
Tax effect	(3)	(11)
Net of tax	$ 14	$ 33

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)
Beginning Balance (in shares) at Jun. 30, 2017			18,165,110
Net Income		6,604			6,604
Other comprehensive income (loss)		(618)						(618)
Reclassification of certain tax effects on other comprehensive income	[1]				1,117			(1,117)	[2]
Common stock dividends declared		(504)			(504)
Issuance of common stock	[3]	(17)		(17)
ESOP shares committed to be released		2,248		1,069		1,179
Ending Balance at Jun. 30, 2018		287,559	$ 182	179,045	128,365	(13,083)		(6,950)
Ending Balance (in shares) at Jun. 30, 2018			18,165,110
Net Income		8,318			8,318
Other comprehensive income (loss)		1,860						1,860
Common stock dividends declared		(2,183)			(2,183)
Repurchase of common stock		(18,305)					$ (18,305)
Repurchase of common stock (in shares)			(908,256)
Restricted stock awards granted			$ 5	(5)
Restricted stock awards granted (in shares)			547,185
Stock-based compensation		2,140		2,140
ESOP shares committed to be released		1,918		949		969
Ending Balance at Jun. 30, 2019		$ 281,307	$ 187	$ 182,129	$ 134,500	$ (12,114)	$ (18,305)	$ (5,090)
Ending Balance (in shares) at Jun. 30, 2019			17,804,039
[1]	The adoption of ASU 2018-02 requires the reclassification from accumulated other comprehensive income to retained earnings of certain stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017. Refer to Footnote 13 - Income Taxes for additional information.
[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.
[3]	Represents costs incurred in association with the Company's initial public offering completed in the prior period.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement Of Stockholders Equity [Abstract]
Common stock dividends declared (per share)	$ 0.13	$ 0.03
ESOP shares committed to be released (in shares)	96,881	117,948

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
OPERATING ACTIVITIES
Net income	$ 8,318	$ 6,604
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan loss	808	414
Depreciation and amortization	1,178	1,432
Amortization of net premiums on securities and deposits, and net deferred loan origination costs	1,277	1,679
Deferred income tax (credit) expense, net of valuation reserves	(350)	2,425
Net increase in accrued interest receivable	(439)	(665)
Net (gain) loss on sales of foreclosed real estate	(24)	7
Net gains on sale of securities	(62)	(236)
Net gain on sale of bank premises	(156)
Write-downs on foreclosed real estate	21
Stock-based compensation	2,140
ESOP compensation	1,918	2,248
Earnings from cash surrender value of BOLI	(544)	(568)
Net accretion of purchase account adjustments	(357)	(563)
Other adjustments, principally net changes in other assets and liabilities	(741)	1,834
Net cash provided by operating activities	12,987	14,611
Purchases of investment securities:
Held to maturity	(57,925)	(51,218)
Available for sale		(27,498)
Sales of investment securities available for sale	14,021	7,511
Maturities and calls of investment securities:
Held to maturity	64,988	80,997
Available for sale	20,711	24,202
Loan principal disbursement, net	(112,034)	(818)
Purchase of loans	(80,833)	(93,166)
Net (purchase) redemption of FHLB stock	(4,205)	1,082
Purchase of bank premises and equipment, net of sales	(1,116)	(753)
Proceeds from sales of foreclosed real estate	487	1,249
Net cash used in investing activities	(155,906)	(58,412)
FINANCING ACTIVITIES
Net increase in deposits	68,364	69,019
Net increase (decrease) in short-term FHLB advances	60,000	(23,636)
Proceeds from long-term FHLB advances	42,500
Repayment of long-term FHLB advances	(10,125)	(121)
Net increase in mortgage escrow funds	552	719
Common stock dividends paid	(2,183)	(504)
Issuance of common stock		(17)
Repurchase of common stock	(18,305)
Net cash provided by financing activities	140,803	45,460
Net (decrease) increase in cash and cash equivalents	(2,116)	1,659
Cash and cash equivalents at beginning of period	62,145	60,486
Cash and cash equivalents at end of period	60,029	62,145
Cash paid for:
Interest	10,688	6,204
Income taxes (net of refunds)	2,933	2,766
Loans transferred to foreclosed real estate and other assets	$ 1,182	$ 739

Basis of Presentation

Basis of Presentation	12 Months Ended
	Jun. 30, 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 state-chartered commercial bank and its deposits are insured up to applicable limits by the Deposit Insurance Fund of the Federal Deposit Insurance Corporation (“FDIC”). The Bank’s primary regulators are the FDIC and the New York State Department of Financial Services. Basis of Presentation UpCounty Realty Corp. (formerly PCSB Realty Ltd.) Use of Estimates Cash Flows Investment Securities Debt securities available for sale are reported at fair value. Unrealized gains and losses on debt securities available for sale are excluded from earnings and reported as accumulated other comprehensive income or loss (a separate component of equity), net of related income taxes. Premiums and discounts on debt securities are amortized to interest income on a level-yield basis over the terms of the securities. Realized gains and losses on sales of debt securities are determined based on the amortized cost of the specific securities sold. Management evaluates securities for other-than-temporary impairment (OTTI) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. Loans Receivable Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, unamortized purchase premiums and discounts, and an allowance for loan losses. Interest income is accrued on the unpaid principal balance. Interest income on loans is discontinued at the time the loan is ninety days delinquent unless the loan is well secured and in process of collection. Loan purchase premiums and discounts are amortized over the contractual term of the loans Loan origination fees and certain direct loan origination costs are deferred and amortized to interest income as an adjustment to yield over the contractual term of the loans. Unamortized fees and costs on prepaid loans are recognized in interest income at the time of prepayment. Purchased Credit Impaired Loans Such purchased credit impaired loans are accounted for individually or aggregated into pools of loans based on common risk characteristics, such as credit score, loan type, and date of origination. The Company estimates the amount and timing of expected cash flows for each loan or pool, and the expected cash flows in excess of amount paid is recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loan’s or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, an allowance is recorded as a provision for loan losses. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income. Allowance for Loan Losses Establishing the allowance for loan losses involves significant management judgments utilizing the best information available at the time. Those judgments are subject to further examination by the Bank’s regulators. Future adjustments to the allowance for loan losses may be necessary based on changes in economic and real estate market conditions, further information obtained regarding known problem loans, the identification of additional problem loans, and other factors. The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for loans evaluated under the Company’s normal loan review procedures. Loans evaluated on an individual basis for impairment may be measured by the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. If the fair value of an impaired loan is less than its recorded investment, an impairment allowance is recognized and included in the allowance for loan losses. Troubled debt restructurings are separately identified for impairment disclosures and are initially measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported at the fair value of the collateral. For troubled debt restructurings that subsequently default, the Company determines the amount of reserve in accordance with the accounting policy for the allowance for loan losses. The general component of the allowance covers non-impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Company over a thirty-six month period, with heaviest weight placed on the most recent periods. This actual loss experience is supplemented with other economic factors based on the risks present for each portfolio segment. These economic factors include consideration of the following: lending policies, underwriting, charge-off and collection procedures; national and local economic trends and conditions; trends in nature and volume of the loan portfolio; experience, ability, and depth of lending management and other relevant staff; trends in delinquencies, classified loans and restructurings; quality of the loan review system and Board oversight; value of underlying collateral for collateral dependent loans; existence and effect of concentrations and levels; and effects of external factors, such as competition, legal and regulatory factors. The following portfolio segments have been identified: residential, commercial mortgage, construction, commercial, home equity and consumer and overdrafts. The risk characteristics of each of the identified portfolio segments are as follows: Residential Loans – residential loans are generally made on the basis of the borrower’s ability to make repayment from his or her employment income or other income and are secured by real property whose value tends to be more easily ascertainable. Repayment of residential loans is subject to adverse employment conditions in the local economy leading to increased default rates and decreased market values from oversupply in a geographic area. In general, these loans depend on the borrower’s continuing financial stability and, therefore, are likely to be adversely affected by various factors, including job loss, divorce, illness, or personal bankruptcy. Furthermore, the application of various federal and state laws, including federal and state bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans. Commercial Mortgage – commercial mortgage loans, including multifamily real estate loans, are secured by multifamily and nonresidential real estate and generally have larger balances and involve a greater degree of risk than residential real estate loans. Repayment of commercial mortgage loans depend on the global cash flow analysis of the borrower and the net operating income of the property, the borrower’s expertise, credit history and profitability, and the value of the underlying property. Of primary concern in commercial real estate lending is the borrower’s creditworthiness and the cash flow generated from the property securing the loan. As a result, repayment of such loans may be subject, to a greater extent than residential real estate loans, to adverse conditions in the real estate market or the economy. Commercial real estate is also subject to adverse market conditions that cause a decrease in market value or lease rates, obsolescence in location or function and market conditions associated with over supply of units in a specific region. Construction – construction financing is generally considered to involve a higher degree of risk of loss than long-term financing on improved, occupied real estate. Risk of loss on a construction loan depends largely upon the accuracy of the initial estimate of the property’s value at completion of construction and the estimated cost of construction. During the construction phase, a number of factors could result in delays and cost overruns. If the estimate of construction costs proves to be inaccurate, additional funds may be required to be advanced in excess of the amount originally committed to permit completion of the building. If the estimate of value proves to be inaccurate, the value of the building may be insufficient to assure full repayment if liquidation is required. If foreclosure is required on a building before or at completion due to a default, there can be no assurance that all of the unpaid balance of, and accrued interest on, the loan as well as related foreclosure and holding costs will be recovered. Commercial – commercial loans are generally of higher risk than other types of loans and typically are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. As a result, the availability of funds for the repayment of commercial loans may depend substantially on the success of the business itself. Furthermore, any collateral securing such loans may depreciate over time, may be difficult to appraise, and may fluctuate in value. Home Equity Lines of Credit – home equity lines of credit consist of both fixed and variable interest rate products. These are primarily home equity loans to residential mortgage customers within our primary market area. These loans generally will not exceed a combined (i.e., first and second mortgage) loan-to-value ratio of 75% percent at origination. Consumer and overdraft loans – consumer loans generally have shorter terms and higher interest rates than one-to-four family mortgage loans. In addition, consumer loans expand the products and services we offer to better meet the financial services needs of our customers. Consumer loans generally involve greater credit risk than residential mortgage loans because of the difference in the underlying collateral. Repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment of the outstanding loan balance because of the greater likelihood of damage to, loss of, or depreciation in the underlying collateral. The remaining deficiency often does not warrant further substantial collection efforts against the borrower beyond obtaining a deficiency judgment. In addition, consumer loan collections depend on the borrower’s personal financial stability. Furthermore, the application of various federal and state laws, including federal and state bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans. Foreclosed Real Estate Federal Home Loan Bank (FHLB) Stock Premises and Equipment Bank Owned Life Insurance (BOLI) Goodwill and Other Intangible Assets Other intangible assets, consisting of a core deposit intangible asset arising from a whole bank acquisition, are amortized on an accelerated method over their estimated useful lives of 10 years. Loan Commitments and Related Financial Instruments Derivatives Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged. Net cash settlements on derivatives that do not qualify for hedge accounting are reported in non-interest income. Cash flows on hedges are classified in the cash flow statement the same as the cash flows of the items being hedged. The Company formally documents the relationship between derivatives and hedged items, as well as the risk management objective and the strategy for undertaking hedge transactions at the inception of the hedging relationship. The documentation includes linking fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items. The Company discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative is settled or terminates, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm, or treatment of the derivative as a hedge is no longer appropriate or intended. When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded as non-interest income. When a fair value hedge is discontinued, the hedged asset or liability is no longer adjusted for changes in fair value and the existing basis adjustment is amortized or accreted over the remaining life of the asset or liability. When a cash flow hedge is discontinued but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods which the hedged transactions will affect earnings. Income Taxes Deferred tax assets and liabilities are measured using the enacted tax rates expected to apply to taxable income in future years. The effect on deferred tax assets and liabilities of a change in tax laws or rates is recognized in the period that includes the enactment date of the change. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Company recognizes interest and/or penalties related to income tax matters in income tax expense. Earnings Per Share include stock options and unvested restricted stock. Earnings and dividends per share are restated for all stock splits and stock dividends through the date of the issuance of the financial statements. Stock-Based Compensation: Compensation cost is recognized for stock options and restricted stock awards issued to employees and non-employee directors based on the fair value of these awards at the grant date. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the date of grant is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. The Company’s policy is to recognize forfeitures as they occur. Employee Benefit Plans: Employee 401(k) expense is the amount of matching contributions. Pension expense is the net of service and interest cost, return on plan assets and amortization of gains and losses not immediately recognized. SERP expense is the net of interest cost and service cost, which allocates the benefits over years of service. The Holding Company and Bank maintain the PCSB Bank Employee Stock Ownership Plan (the “ESOP”). Compensation expense related to the ESOP is recorded during the period in which the shares become committed to be released to participants. The compensation expense is measured based upon the average fair market value of the stock during the period, and, to the extent that the fair value of the shares committed to be released differs from the original cost of such shares, the difference is recorded as an adjustment to additional paid-in capital. Loss Contingencies Fair Value of Financial Instruments Segment Reporting Reclassifications

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Jun. 30, 2019
Accounting Changes And Error Corrections [Abstract]
Recent Accounting Pronouncements	N ote 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 18. 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 non-service costs (credits) of $250,000 and $(184,000) to be included in other operating expense for the year ended June 30, 2019 and 2018, respectively. In November 2016, the FASB issued ASU 2016-18 “Statement of Cash Flows - Restricted Cash.” This ASU provides guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows. The amendments in this update require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The adoption of ASU 2016-18 on July 1, 2018 did not have a material impact on the Company’s consolidated financial statements. 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 longer than 12 months 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 Company currently leases eleven branches and two administrative offices. The Company adopted this standard and the related amendments (collectively "ASC 842") on July 1, 2019 and utilized the modified retrospective approach provided by ASU 2018-11, "Leases (Topic 842): Targeted Improvements," that allowed for a cumulative effect adjustment in the period of adoption. Under this method of adoption, the comparative information in the consolidated financial statements has not been revised and continues to be reported under the previously applicable lease accounting guidance (ASC 840). We also utilized the package of practical expedients permitted under the transition guidance which included the carry-forward of historical lease classification. We anticipate the adoption of ASU 2016-02 on July 1, 2019 will result in the establishment of a right to use asset and a corresponding lease obligation of no more than 1% of consolidated assets. There will be no impact on the Company’s consolidated results of operations as a result of this adoption. 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. Management is currently evaluating the impact that ASU 2016-13 will have on the Company’s consolidated financial position, results of operations and disclosures. In June 2019, the FASB voted to propose a delay for the implementation of the standard until January 2023 for certain companies, including small reporting companies (as defined by the SEC), non-SEC public companies and private companies. The Company currently qualifies as a small reporting company and would be subject to the proposed delay if approved. 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. Management elected to adopt ASU 2017-08 on July 1, 2019 which will result in no material impacts on the Company’s consolidated financial statements.

Investment Securities

Investment Securities	12 Months Ended
	Jun. 30, 2019
Investments Debt And Equity Securities [Abstract]
Investment Securities	Note 3 . Investment Securities The amortized cost, gross unrealized/unrecognized gains and losses and fair value of available for sale and held to maturity securities at June 30, 2019 and 2018 were as follows: June 30, 2019 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 37,027 $ 5 $ (121 ) $ 36,911 Corporate and other debt securities 8,349 20 (9 ) 8,360 Mortgage-backed securities – residential 27,115 23 (181 ) 26,957 Total available for sale $ 72,491 $ 48 $ (311 ) $ 72,228 Held to maturity: U.S. Government and agency obligations $ 96,545 $ 192 $ (246 ) $ 96,491 Corporate and other debt securities 34,033 133 (413 ) 33,753 Mortgage-backed securities – residential 133,602 818 (372 ) 134,048 Mortgage-backed securities – collateralized mortgage obligations 52,940 311 (147 ) 53,104 Mortgage-backed securities – commercial 28,425 451 (29 ) 28,847 Total held to maturity $ 345,545 $ 1,905 $ (1,207 ) $ 346,243 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 For the year ended June 30, 2019, the Company sold $14.0 million of securities resulting in $62,000 of gross realized gains. For the year ended June 30, 2018, the Company sold securities with a carrying amount of $8.6 million, resulting in $236,000 of gross realized gains, which included the disposal of $1.3 million of securities classified as held to maturity, resulting in $72,000 of gross realized gains. These held to maturity 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, comparing both principal and interest over terms. The following table presents the fair value and carrying amount of debt securities at June 30, 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) 1 year or less $ 38,550 $ 38,429 $ 25,015 $ 24,950 1 to 5 years 62,995 63,055 20,361 20,321 5 to 10 years 25,033 24,701 - - Mortgage-backed securities and other 218,967 220,058 27,115 26,957 Total $ 345,545 $ 346,243 $ 72,491 $ 72,228 Securities pledged had carrying amounts of $166.4 million and $140.5 million at June 30, 2019 and 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 June 30, 2019 and 2018: June 30, 2019 Less than 12 months Greater than 12 months 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 $ - $ - $ 32,919 $ (121 ) $ 32,919 $ (121 ) Corporate and other debt securities - - 3,269 (9 ) 3,269 (9 ) Mortgage-backed securities – residential - - 24,000 (181 ) 24,000 (181 ) Total available for sale $ - $ - $ 60,188 $ (311 ) $ 60,188 $ (311 ) Held to maturity: U.S. Government and agency obligations $ - $ - $ 59,306 $ (246 ) $ 59,306 $ (246 ) Corporate and other debt securities 17,087 (413 ) - - 17,087 (413 ) Mortgage-backed securities – residential 1,666 (26 ) 54,648 (346 ) 56,314 (372 ) Mortgage-backed securities – collateralized mortgage obligations - - 29,372 (147 ) 29,372 (147 ) Mortgage-backed securities – commercial - - 6,972 (29 ) 6,972 (29 ) Total held to maturity $ 18,753 $ (439 ) $ 150,298 $ (768 ) $ 169,051 $ (1,207 ) June 30, 2018 Less than 12 months Greater than 12 months 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 ) For the year ended June 30, 2019, the Company’s securities portfolio consisted of $417.8 million in securities, of which 135 securities with a fair value of $229.2 million were in an unrealized loss position. The majority of unrealized losses are related to the Company’s U.S. Government and agency obligations and mortgage-backed securities. For the year ended 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 position. The majority of unrealized losses are related to the Company’s U.S. Government and agency obligations and mortgage-backed securities. There were no securities for which the Company believes it is not probable that it will collect all amounts due according to the contractual terms of the security as of June 30, 2019 and 2018. Management believes the unrealized losses are primarily a result of changing 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 June 30, 2019 and 2018.

Loans Receivable

Loans Receivable	12 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Loans Receivable	Note 4 . Loans Receivable Loans receivable are summarized as follows (in thousands): June 30, 2019 2018 Mortgage loans: Residential $ 265,167 $ 250,578 Commercial 651,396 495,265 Construction 13,231 17,352 Net deferred loan origination costs 1,031 1,041 Total mortgages 930,825 764,236 Commercial and consumer loans: Commercial loans 133,614 104,135 Home equity lines of credit 33,204 37,395 Consumer and overdrafts 365 745 Net deferred loan origination costs 777 729 Total commercial and consumer loans 167,960 143,004 Total loans receivable 1,098,785 907,240 Allowance for loan losses (5,664 ) (4,904 ) Loans receivable, net $ 1,093,121 $ 902,336 In 2015, the Bank 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 years ended June 30, 2019 and 2018 (in thousands): For the year ended June 30, 2019 Beginning Allowance Provision (Credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 386 $ (33 ) $ - $ 10 $ 363 Commercial 3,073 894 (114 ) - 3,853 Construction 505 (442 ) - 96 159 Commercial loans 780 348 - 2 1,130 Home equity lines of credit 80 (15 ) - - 65 Consumer and overdrafts 7 31 (34 ) 7 11 Acquired: Residential 73 10 - - 83 Commercial - 15 (15 ) - - Total $ 4,904 $ 808 $ (163 ) $ 115 $ 5,664 For the year ended June 30, 2018 Beginning Allowance Provision (Credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 360 $ 161 $ (136 ) $ 1 $ 386 Commercial 2,589 114 - 370 3,073 Construction 1,150 352 (997 ) - 505 Commercial loans 949 (335 ) (54 ) 220 780 Home equity lines of credit 76 45 (60 ) 19 80 Consumer and overdrafts - 30 (23 ) - 7 Acquired: Residential 26 47 - - 73 Total $ 5,150 $ 414 $ (1,270 ) $ 610 $ 4,904 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 June 30, 2019 and 2018 (in thousands): June 30, 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 $ 1,774 $ 262,124 $ 1,269 $ 265,167 $ 130 $ 233 $ 83 $ 446 Commercial 1,418 649,088 890 651,396 - 3,853 - 3,853 Construction - 13,231 - 13,231 - 159 - 159 Commercial loans 2,016 131,598 - 133,614 39 1,091 - 1,130 Home equity lines of credit 689 32,359 156 33,204 4 61 - 65 Consumer and overdrafts - 365 - 365 - 11 - 11 Total $ 5,897 $ 1,088,765 $ 2,315 $ 1,096,977 $ 173 $ 5,408 $ 83 $ 5,664 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 and for the years ended June 30, 2019 and 2018 (in thousands): June 30, 2019 Unpaid Principal Balance Recorded Investment Allowance for loan losses With no related allowance recorded: Residential $ 1,061 $ 1,028 $ - Commercial 1,471 1,418 - Commercial loans 2,007 1,836 - Home equity lines of credit 750 678 - With an allowance recorded: Residential 723 746 130 Commercial loans 180 180 39 Home equity lines of credit 11 11 4 Total $ 6,203 $ 5,897 $ 173 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 an 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 For the year ended For the year ended June 30, 2019 June 30, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 1,377 $ 20 $ 3,041 $ 184 Commercial 1,496 51 2,350 248 Construction - - 93 17 Commercial loans 2,064 200 3,457 1,049 Home equity lines of credit 577 7 507 22 With an allowance recorded: Residential 753 14 453 15 Construction 869 - 2,720 - Commercial loans 50 11 1,491 66 Home equity lines of credit 11 - 11 - Total $ 7,197 $ 303 $ 14,123 $ 1,601 The following table presents the recorded investment in nonaccrual loans and in loans past due over 90 days still on accrual status, by class of loans as of June 30, 2019 and 2018 (in thousands): Loans Past Due Over 90 Days Nonaccrual and Still Accruing June 30, June 30, June 30, June 30, 2019 2018 2019 2018 Originated: Residential $ 536 $ 604 $ - $ - Commercial - 262 - - Construction - 2,260 - - Commercial loans 150 788 - - Home equity lines of credit 383 45 - - Consumer and overdrafts - - 1 - Acquired: Residential 795 1,308 - - Commercial 568 532 - - Home equity lines of credit 294 303 - - Total $ 2,726 $ 6,102 $ 1 $ - Nonperforming loans include both smaller-balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. The table above excludes acquired loans that are accounted for as purchased credit impaired loans totaling $501,000 and $1.8 million as of June 30, 2019 and 2018, respectively. Such loans are excluded because the loans are in pools that are considered performing. The discounts arising from recording these loans at fair value upon acquisition were due in part to credit quality and the accretable yield is being recognized as interest income over the life of the loans based on expected cash flows. The following tables present the aging of the recorded investment in past due loans by class of loans as of June 30, 2019 and 2018 (in thousands): June 30, 2019 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current Total Originated: Residential $ - $ - $ 86 $ 86 $ 217,970 $ 218,056 Commercial - - - - 600,675 600,675 Construction - - - - 13,231 13,231 Commercial loans - 150 - 150 133,286 133,436 Home equity lines of credit 344 - 312 656 28,767 29,423 Consumer and overdrafts - - 1 1 348 349 Total originated 344 150 399 893 994,277 995,170 Acquired: Residential 220 116 709 1,045 46,066 47,111 Commercial - - 568 568 50,153 50,721 Commercial loans - - - - 178 178 Home equity lines of credit - 67 296 363 3,418 3,781 Consumer and overdrafts - - - - 16 16 Total acquired 220 183 1,573 1,976 99,831 101,807 Total $ 564 $ 333 $ 1,972 $ 2,869 $ 1,094,108 $ 1,096,977 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 June 30, 2019 and 2018, the Company had 14 and 12 loans classified as troubled debt restructurings totaling $4.1 million and $3.8 million, respectively, including $3.2 million and $3.0 million, respectively, of loans still accruing. The Company has allocated $135,000 and $139,000, respectively, of specific reserves to customers whose loan terms have been modified in troubled debt restructurings as of June 30, 2019 and 2018, and has not committed to lend additional amounts to customers with outstanding loans that are classified as troubled debt restructurings. The following table presents loans by modified in troubled debt restructurings that occurred during the years ended June 30, 2019 and 2018 (dollars in thousands): Number of loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Year Ended June 30, 2019 Residential mortgage 3 $ 1,115 $ 1,110 Home equity lines of credit 1 73 73 Total 4 $ 1,188 $ 1,183 Year Ended June 30, 2018 Commercial loans 1 $ 275 $ 289 Total 1 $ 275 $ 289 The Company had no troubled debt restructurings for which there was a payment default in the year ended June 30, 2019 that were modified in the twelve months prior to default. There were two troubled debt restructurings, both commercial loans, for which there was a payment default in the year ended June 30, 2018 that were modified in the twelve months prior to default, which resulted in a $2,000 increase in the allowance for loan loss. 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): June 30, 2019 Pass Special Mention Substandard Total Originated: Residential $ 216,438 $ 1,071 $ 547 $ 218,056 Commercial 600,216 339 120 600,675 Construction 13,231 - - 13,231 Commercial loans 123,361 6,423 3,652 133,436 Home equity lines of credit 28,996 67 360 29,423 Consumer and overdrafts 349 - - 349 Total originated 982,591 7,900 4,679 995,170 Acquired: Residential 44,959 211 1,941 47,111 Commercial 45,726 3,537 1,458 50,721 Commercial loans 178 - - 178 Home equity lines of credit 3,331 68 382 3,781 Consumer and overdrafts 16 - - 16 Total acquired 94,210 3,816 3,781 101,807 Total $ 1,076,801 $ 11,716 $ 8,460 $ 1,096,977 June 30, 2018 Pass Special Mention Substandard 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 follows (in thousands): June 30, 2019 2018 Residential $ 1,186 $ 1,232 Commercial 890 1,477 Home equity lines of credit 156 168 Carrying amount, net of allowance of $83 and $73, respectively $ 2,232 $ 2,877 Accretable yield, or income expected to be collected, for acquired loans is as follows (in thousands): Year ended June 30, 2019 2018 Beginning balance $ 245 $ 403 New loans acquired - - Accretion income (53 ) (70 ) Reclassification from non-accretable difference - 5 Disposals - (93 ) Ending balance $ 192 $ 245

Premises and Equipment

Premises and Equipment	12 Months Ended
	Jun. 30, 2018
Property Plant And Equipment [Abstract]
Premises and Equipment	Note 5 . Premises and Equipment Premises and equipment are summarized as follows at June 30 (in thousands): 2019 2018 Land $ 1,997 $ 1,997 Building and Leasehold improvements 13,753 13,430 Furniture, fixtures and equipment 6,808 6,096 Construction and improvements in process 15 355 22,573 21,878 Less: accumulated depreciation and amortization (10,771 ) (10,280 ) Total Bank premises and equipment, net $ 11,802 $ 11,598 Depreciation expense was $1.1 million and $1.3 million for the years ended June 30, 2019 and 2018, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Note 6 . Goodwill and Intangible Assets The change in goodwill during the years ended June 30, 2019 and 2018 are as follows (in thousands): 2019 2018 Balance at July 1, $ 6,106 $ 6,106 Impairment - - Total at June 30, $ 6,106 $ 6,106 Impairment exists when a reporting unit’s carrying value of goodwill exceeds its fair value. The Company tests for goodwill impairment on an annual basis as of June 30 th Acquired Intangible Assets: Acquired intangible assets were as follows at June 30 (in thousands): 2019 2018 Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortized intangible assets: Core deposit intangible $ 887 $ (564 ) $ 887 $ (454 ) Aggregate amortization expense was $110,000 and $126,000 for the years ended June 30, 2019 and 2018, respectively. Estimated amortization expense for each of the next five fiscal years ended June 30 (in thousands): 2020 $ 94 2021 78 2022 62 2023 46 2024 and after 43

Deposits

Deposits	12 Months Ended
	Jun. 30, 2019
Deposits [Abstract]
Deposits	Note 7 . Deposits Deposit balances are summarized as follows at June 30, 2019 and 2018 (in thousands): 2019 2018 Demand $ 141,379 $ 131,883 NOW Accounts 123,069 117,875 Money market accounts 148,134 49,885 Savings 357,844 465,441 Time deposits 455,395 392,373 Total $ 1,225,821 $ 1,157,457 Time deposits that meet or exceed the FDIC insurance limit of $250,000 were $149.0 million and $116.0 million at June 30, 2019 and 2018, respectively. Scheduled maturities of time deposits were as follows as of June 30, 2019 and 2018 (in thousands): 2019 2018 Within 1 year $ 221,832 $ 183,276 1 year to 2 years 112,394 49,350 2 years to 3 years 41,211 56,746 3 years to 4 years 33,538 56,458 4 years to 5 years 46,420 46,339 Thereafter - 204 Total $ 455,395 $ 392,373 Deposits of local governments held by PCSB Bank were $40.1 million and $39.1 million at June 30, 2019 and 2018, respectively. Additionally, as of June 30, 2019 and 2018, deposits included $77.5 million and $60.0 million of brokered time deposits with remaining maturities between 9 and 36 months.

FHLB and Other Borrowings

FHLB and Other Borrowings	12 Months Ended
	Jun. 30, 2019
Federal Home Loan Banks [Abstract]
FHLB and Other Borrowings	Note 8 . FHLB and Other Borrowings Borrowings consist of advances from the FHLBNY. As of June 30, 2019, FHLB advances consisted of $107.5 million of short and long-term advances with original maturities ranging from 3 to 54 months, as well as a $3.7 million amortizing term loan with a balloon payment of $2.8 million in 2026. The maturity schedule of advances is summarized as follows as of June 30 (dollars in thousands): 2019 2018 Amount Due Weighted Avg. Rate Amount Due Weighted Avg. Rate Within 1 year $ 65,128 2.29 % $ 10,125 1.70 % 1 year to 2 years 30,131 2.10 5,128 1.81 2 years to 3 years 7,635 3.22 131 2.62 3 years to 4 years 138 2.62 135 2.62 4 years to 5 years 5,142 3.31 138 2.62 Thereafter 3,042 2.62 3,184 2.62 Total $ 111,216 2.36 % $ 18,841 1.91 % As a member of the FHLBNY, the Bank had access to funds in the form of FHLB advances of approximately $291.2 million and $314.9 million at June 30, 2019 and 2018, of which $111.2 million and $18.8 million was outstanding as of each respective period. Advances are secured by the Bank’s investment in FHLB stock and by a blanket security agreement. This agreement requires the Bank to maintain as collateral certain qualifying assets (such as U.S. Government agency and MBSs) with a discounted fair value, as defined, at least equal to 110% of any outstanding advances. At June 30, 2019, the Bank also had access to funds of approximately $118.0 million in the form of secured borrowings through the discount window of the FRB. Collateral for these borrowings may include qualifying assets, such as one-to-four family residential loans. The Bank had no outstanding FRB borrowings as of June 30, 2019 or 2018.

Commitment and Contingencies

Commitment and Contingencies	12 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 9 . Commitments and Contingencies Financial Instruments with Off-Balance-Sheet Risk described in Note 1 The contract amounts of credit-related financial instruments reflect the extent of the Company’s involvement with those classes of financial instruments. The Company’s exposure to credit loss in the event of non-performance by the counterparty is represented by the contract amount. The Company uses the same credit policies in extending commitments, lines of credit and standby letters of credit as it does for on-balance sheet instruments. The contract amounts of credit-related financial instruments at June 30, 2019 and 2018, are summarized below (in thousands): 2019 2018 Commitments to originate loans $ 136,770 $ 102,644 Unused lines of credit 52,644 56,553 Standby letter of credit 1,688 1,420 Lines of credit (including undisbursed construction loans) and commitments to originate loans are agreements to lend to a customer as long as there is no violation of any condition established in the contract. These agreements generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since certain lines of credit and commitments are expected to expire without being funded, the contract amounts do not necessarily represent future cash requirements. In extending lines of credit and commitments, the Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the customer. The Company issues financial standby letters of credit that are irrevocable undertakings by the Company to guarantee payment of a specified financial obligation. Most of the Company’s financial standby letters of credit arise in connection with lending relationships and have terms of one year or less. The maximum potential future payments the Company could be required to make equals the contract amount of standby letters of credit shown in the preceding table. The Company’s recognized liability for financial standby letters of credit was insignificant at June 30, 2019 and 2018. Operating Lease Commitments Within 1 year $ 1,733 1 year to 2 years 1,794 2 year to 3 years 1,770 3 year to 4 years 1,683 4 year to 5 years 1,313 Thereafter 5,647 Total $ 13,940 Legal Proceedings Company

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss	Note 10 . Accumulated Other Comprehensive 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 (1) Unrealized loss on pension benefits (2) Unrealized loss on SERP benefits (2) Total Balance at July 1, 2018 $ (1,536 ) $ (5,150 ) $ (264 ) $ (6,950 ) Other comprehensive income (loss) before reclassifications 1,741 (486 ) (19 ) 1,236 Amounts reclassified from accumulated other comprehensive (loss) income (62 ) 1,144 36 1,118 Tax effect (352 ) (139 ) (3 ) (494 ) Net other comprehensive income 1,327 519 14 1,860 Balance at June 30, 2019 $ (209 ) $ (4,631 ) $ (250 ) $ (5,090 ) Net unrealized gain (loss) on available for sale securities (1) Unrealized loss on pension benefits (2) Unrealized loss on SERP benefits (2) Total Balance at July 1, 2017 $ 37 $ (5,002 ) $ (250 ) $ (5,215 ) Other comprehensive (loss) income before reclassifications (1,835 ) 335 10 (1,490 ) Amounts reclassified from accumulated other comprehensive (loss) income (164 ) 725 34 595 Tax effect 558 (270 ) (11 ) 277 Net other comprehensive (loss) income (1,441 ) 790 33 (618 ) Reclassification of certain tax effects on other comprehensive (loss) (3) (132 ) (938 ) (47 ) (1,117 ) Balance at June 30, 2018 $ (1,536 ) $ (5,150 ) $ (264 ) $ (6,950 ) (1) (2) ( 3 )

Earnings Per Share

Earnings Per Share	12 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Note 11 . 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 matter, except that the denominator includes the number of additional common shares that would have been outstanding if potentially dilutive common shares were issued using the treasury stock method. Dilutive financial instruments include stock options and unvested restricted stock. The following table provides factors used in the earnings per share computation for the years ended June 30, 2019 and 2018. Year Ended June 30, 2019 2018 (amounts in thousands, except share and per share data) Net income applicable to common stock $ 8,318 $ 6,604 Average number of common shares outstanding 17,752,473 18,165,110 Less: Average unallocated ESOP shares (1,259,713 ) (1,362,216 ) Average number of common shares outstanding used to calculate basic earnings per common share 16,492,760 16,802,894 Effect of equity-based awards 34,357 - Average number of common shares outstanding used to calculate diluted earnings per common share 16,527,117 16,802,894 Earnings per Common share: Basic $ 0.50 $ 0.39 Diluted $ 0.50 $ 0.39 Stock options for 1,339,293 shares of common stock were not considered in computing dilutive earnings per common share for the year ended June 30, 2019 because they were antidilutive. There were no potentially dilutive common stock equivalents during the year ended June 30, 2018.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 12 . 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 June 30, 2019 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 36,911 $ - $ 36,911 Corporate and other debt securities - 8,360 - 8,360 Mortgage-backed securities – residential - 26,957 - 26,957 Derivatives - interest rate contracts - 1,339 - 1,339 Total assets at fair value $ - $ 73,567 $ - $ 73,567 Derivatives - interest rate contracts $ - $ 1,339 $ - $ 1,339 Total liabilities at fair value $ - $ 1,339 $ - $ 1,339 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 616 $ 616 Commercial loans - - 141 141 Home equity lines of credit - - 7 7 Foreclosed real estate - - 653 653 Total assets at fair value $ - $ - $ 1,417 $ 1,417 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 Impaired loans in the table above had a carrying amount of $937,000 and a remaining valuation allowance of $173,000 at June 30, 2019, incurred no net charge-offs and resulted in an additional provision for loan losses of $40,000 during the year ended June 30, 2019. Impaired loans in the table above had a carrying amount of $3.9 million and a remaining valuation allowance of $451,000 at June 30, 2018, and incurred $1.1 million of net charge-offs and resulted in an additional provision for loan losses of $435,000 during the year ended June 30, 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 June 30, 2019 and 2018 (dollars in thousands): Valuation Unobservable Range or Fair Value Technique(s) Input(s) Rate Used June 30, 2019 Impaired loans - residential mortgages $ 616 Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - commercial loans 141 Discounted cash flow Discount rate 6.0% to 7.0% Impaired loans - home equity lines of credit 7 Discounted cash flow Discount rate 6.2% 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 June 30, 2019 Financial assets: Cash and cash equivalents $ 60,029 $ 60,029 $ - $ - $ 60,029 Investment securities held to maturity 345,545 - 346,243 - 346,243 Investment securities available for sale 72,228 - 72,228 - 72,228 Loans receivable, net 1,093,121 - - 1,092,878 1,092,878 Accrued interest receivable 4,797 - 1,330 3,467 4,797 FHLB stock 6,255 N/A N/A N/A N/A Derivative assets - interest rate contracts 1,339 - 1,339 - 1,339 Financial liabilities: Demand, NOW, money market deposits and savings accounts 770,426 770,426 - - 770,426 Accrued interest payable 209 16 193 209 Time deposits 455,395 - 460,554 - 460,554 Mortgage escrow funds 9,355 9,355 - - 9,355 FHLB advances 111,216 - 111,818 - 111,818 Derivative liabilities - interest rate contracts 1,339 - 1,339 - 1,339 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 105,504 - 105,504 - 105,504 Loans receivable, net 902,336 - - 882,319 882,319 Accrued interest receivable 4,358 - 1,402 2,956 4,358 FHLB 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 Accrued interest payable 154 7 147 154 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.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax	Note 13 . Income Taxes The components of income tax expense (benefit) are summarized as follows for the years ended June 30 (in thousands): 2019 2018 Current tax expense (benefit) Federal $ 2,624 $ 2,577 State 412 20 3,036 2,597 Deferred tax expense (benefit) Federal (329 ) 2,414 State (91 ) 313 (420 ) 2,727 State tax valuation allowances, net of federal benefit 70 (302 ) Total $ 2,686 $ 5,022 On December 22, 2017, as part of the Tax Cuts and Jobs Act, the federal government enacted comprehensive tax reform containing provisions with a number of impacts on corporate income taxes, the most significant of which provides a decrease in the corporate income tax rate from 34% to 21% for tax years beginning on or after January 1, 2018. The company was required to re-measure as of the date the law was enacted, its net deferred tax asset to reflect the income tax rate expected to be effective when deferred tax positions will be realized. As a result, the Company recorded a re-measurement charge through income tax expense of $1.6 million for the year ended June 30, 2018. The Company utilizes a calendar year tax year. As a result of the aforementioned tax reform, a “blended” federal statutory rate of 28.06% is used for the year ended June 30, 2018, based on the daily weighted average statutory rate effective throughout the fiscal year. Effective tax rates differ from the federal statutory rate applied to income before income taxes due to the following (dollars in thousands): 2019 2018 Federal statutory rate 21.00 % 28.06 % Tax at federal statutory rate $ 2,311 $ 3,262 State Taxes, net of federal benefit 310 24 Tax-exempt income (66 ) (61 ) BOLI income (114 ) (157 ) ESOP Compensation 199 300 Deferred tax re-remeasurement charge - 1,570 Other, net 46 84 Total $ 2,686 $ 5,022 Effective tax rate 24.41 % 43.20 % Year-end deferred tax assets and liabilities were due to the following (in thousands): 2019 2018 Deferred Tax Assets: Allowance for Loan Losses $ 1,419 $ 1,222 Other comprehensive loss (defined benefit plans) 1,298 1,439 Deferred compensation 879 836 Charitable contribution carryforward 671 949 Stock based compensation 498 - Depreciation of premises and equipment 416 413 Other comprehensive loss (securities) 55 408 Other 544 611 Total deferred tax assets 5,780 5,878 Deferred Tax Liabilities: Prepaid pension costs 2,416 2,424 Deferred loan costs and fees, net 466 451 Other - 31 Total deferred tax liabilities 2,882 2,906 Deferred tax asset valuation allowance (420 ) (350 ) Net deferred tax asset $ 2,478 $ 2,622 The Company has an apportioned New York State net operating loss carryforward of approximately $1.7 million which will begin to expire in 2034. In addition, the Company has approximately $2.7 million of charitable contribution carryforwards that may be carried forward up to 5 years and will begin to expire in 2022. In 2014, New York State enacted comprehensive tax reform provisions with significant impact on financial institutions. As a result of this legislation, beginning on January 1, 2015, the Company calculated its tax obligation to New York based upon the greater of a calculated income tax liability, a tax liability based upon average equity capital or a fixed minimum fee. As a result of the Company’s ability to deduct a portion of the dividends paid by its captive REIT subsidiary, PCSB Funding Corp., it is more likely than not the Company will generate New York tax losses in future years and therefore calculate its New York tax liability on the basis of average equity capital or a fixed minimum fee. Consequently, the Company maintains a valuation allowance against its net New York deferred tax asset, as it is unlikely this deferred tax asset will impact the Company's New York tax liability in future years. Management has determined that it is not required to establish a valuation allowance against any other deferred tax assets in accordance with accounting principles generally accepted in the United States of America Retained earnings at June 30, 2019 included approximately $2.8 million for which deferred income taxes of approximately $588,000 have not been provided. The retained earnings amount represents the base year allocation of income to bad debt deductions for tax purposes only. Base year reserves are subject to recapture if the Bank makes certain non-dividend contributions, repurchases any of its stock, pays dividends in excess of tax earnings and profits, or ceases to maintain a bank charter. Under ASC 740, this amount is treated as a permanent difference and deferred taxes are not recognized unless it appears that it will be reduced and result in taxable income in the foreseeable future. Events that would result in taxation of these reserves include failure to qualify as a bank for tax purposes or distributions in complete or partial liquidation. The Company is subject to U.S. federal income tax as well as income tax of the states of New York, New Jersey and Connecticut. The Company’s federal and state income tax returns are subject to examination for years after December 31, 2015. At June 30, 2019 and 2018, the Company had no unrecognized tax benefits recorded. The Company does not expect the total amount of unrecognized tax benefits to significantly increase or decrease in the next twelve months.

Post-Retirement Benefits

Post-Retirement Benefits	12 Months Ended
	Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Post-Retirement Benefits	Note 14 . Post-Retirement Benefits Employee Pension Plan The Company maintains a non-contributory defined benefit pension plan that covers employees meeting specific requirements as to age and length of service. The Company’s contributions to this qualified plan are determined on the basis of (i) the maximum amount that can be deducted for federal income tax purposes, and (ii) the amount determined by a consulting actuary as necessary to avoid an accumulated funding deficiency as defined by the Employee Retirement Income Security Act of 1974 (ERISA). Contributions are intended to provide not only for benefits attributed to service to date, but also those expected to be earned in the future. The following is a summary of the plan’s funded status as of June 30, 2019 and 2018 (the measurement date for financial reporting purposes) (in thousands): 2019 2018 Change in benefit obligation: Beginning benefit obligation $ 24,764 $ 25,614 Interest Cost 1,000 968 Actuarial Loss (327 ) 8 Benefits Paid (929 ) (868 ) Settlements (2,152 ) (958 ) Ending benefit obligation 22,356 24,764 Change in plan assets, at fair value: Beginning plan assets 27,975 27,444 Actual return 1,239 2,357 Benefits paid (929 ) (868 ) Settlements (2,152 ) (958 ) Ending Plan assets 26,133 27,975 Funded Status $ 3,777 $ 3,211 Accumulated Benefit Obligation $ 22,356 $ 24,764 The following is a summary of net period pension cost (benefit), contributions and benefits paid for the years ended June 30 (in thousands): 2019 2018 Net period pension cost (benefit) $ 92 $ (321 ) Benefits paid 929 868 Pre-tax amounts recognized in accumulated other comprehensive loss were $5.9 million and $6.5 million for the years ended June 30, 2019 and 2018 respectively. Net periodic pension cost and other amounts recognized in other comprehensive income for the years ended June 30 (in thousands): 2019 2018 Interest cost $ 1,000 $ 968 Expected return on plan assets (2,052 ) (2,014 ) Amortization of prior net loss 1,144 725 Net periodic cost (benefit) $ 92 $ (321 ) The estimated net loss and past service cost for the pension plan that will be amortized from accumulated other comprehensive income into net periodic benefit costs during the year ending June 30, 2020, are $528,000 and $0, respectively. Contributions: Estimated Future Payments 2020 $ 1,217 2021 1,239 2022 1,275 2023 1,312 2024 1,315 Following five years 6,027 Assumptions Weighted-average assumptions used to determine net periodic pension cost are described in the table below. Year ended June 30, 2019 2018 Discount Rate 3.31 % 3.87 % Expected return on plan assets 7.50 % 7.50 % Plan Assets Plan assets are invested in a series of diversified investment funds of RSI Retirement Trust (“the Trust”). The investment funds include equity mutual funds, bond mutual funds, or commingled trust funds, each with its own investment objectives, investment strategies and risks. The Trust has been given discretion by the Company to determine the appropriate strategic asset allocation, as governed by the Trust’s Statement of Investment Objectives and Guidelines. The long-term objective is to be invested 65% in equity securities (equity mutual funds), 34% in debt securities (bond mutual funds) and 1% in cash equivalents. The bond fund portion may be temporarily increased to 50% in order to lessen the volatility of asset values. Asset rebalancing is performed at least annually, with interim adjustments made if the investment mix varies by more than 10% from the target allocation. The weighted average expected long-term rate of return is estimated based on current trends in the plan assets as well as projected future rates of returns on those assets. The long-term rate of return assumption was set based on historical returns earned by equities and fixed income securities, adjusted to reflect expectations of future returns as applied to the plan’s target allocation of asset classes. Equities and fixed income securities were assumed to earn real rates of return in the ranges of 6% to 8% and 3% to 5%, respectively. The long-term inflation rate was estimated to be 2.5%. When these overall return expectations are applied to the plan’s target allocation, the result is an expected rate of return of 7.50%. The plan is only permitted to invest in assets approved by the RSI Trustee Board. All other investments are prohibited. The Company’s actual pension plan asset allocation and target allocation by asset category are as follows: Percentage of Plan Target Assets at Year-End Asset Category Allocation 2019 2018 Equity mutual funds and common/collective trusts 65 % 60 % 67 % Fixed income common/collective trusts 34 % 37 % 32 % Cash equivalents 1 % 3 % 1 % Total 100 % 100 % 100 % Equity, Debt, Investment Funds and Other Securities The fair value of the plan assets at June 30, 2019 and 2018, by asset category, is as follows (in thousands): Fair Value Measurements Using Quoted Prices Significant In Active Other Significant Markets for Observable Unobservable Carrying Identical Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) June 30, 2019 Plan assets Equity mutual funds and common/collective trusts $ 15,837 $ - $ 15,837 $ - Fixed income common/collective trusts 9,618 - 9,618 - Cash equivalents 678 678 - - Total $ 26,133 $ 678 $ 25,455 $ - June 30, 2018 Plan assets Equity mutual funds and common/collective trusts $ 18,914 $ - $ 18,914 $ - Fixed income common/collective trusts 8,893 - 8,893 - Cash equivalents 168 168 - - Total $ 27,975 $ 168 $ 27,807 $ - Defined Contribution Retirement Plan The Company maintains a defined contribution plan for eligible employees hired after October 1, 2012. On February 15, 2017, the Board of Directors approved the freezing of this plan effective May 1, 2017. As a result, the Company had no expense for the year ended June 30, 2019 or 2018. 401(k) Plan The Company maintains a defined contribution plan for eligible employees under Section 401(k) of the Internal Revenue Code. All full-time employees who have attained age twenty-one and have a minimum of one year of service may elect to participate in the plan, by making contributions ranging from 1% to 25% of their compensation. On June 20, 2018, the Board of Directors approved the suspension of the Company match effective July 1, 2018. Prior to July 1, 2018, the Company made matching contributions equal to 75% of the participant’s contributions up to 6% of compensation. Savings plan expense was $0 and $414,000 for the years ended June 30, 2019 and 2018, respectively. Supplemental Retirement Plan The Company also maintains unfunded and non-qualified supplemental retirement plans to provide pension benefits in addition to those provided under the qualified pension plan. The accrued benefit cost for the supplemental plans was approximately $3.7 million and $3.4 million at June 30, 2019 and 2018, respectively, (included in other liabilities in the consolidated statements of financial condition). Included in accumulated other comprehensive income were pre-tax net losses of $318,000 and $335,000 for the supplemental retirement plans as of June 30, 2019 and 2018, respectively. The projected benefit obligation and accumulated benefit obligation were $3.7 million and $3.4 million as of the June 30, 2019 and 2018, respectively. Pension expense for the supplemental plans was $613,000 and $655,000 for the years ended June 30, 2019 and 2018, respectively. Supplemental retirement plan benefits of $272,000 were paid in each of the years ended June 30, 2019 and 2018. Net periodic pension cost and other amounts recognized in other comprehensive income for the years ended June 30 (in thousands): 2019 2018 Service cost $ 455 $ 518 Interest cost 122 103 Amortization of prior net loss 36 34 Net periodic cost $ 613 $ 655 The estimated net loss for the supplemental plans that will be amortized from accumulated other comprehensive income into net periodic benefit costs during the year ending June 30, 2020, is $45,000. The following benefit payments, which reflect expected future service, are expected for the years ending June 30 (in thousands): 2020 $ 272 2021 272 2022 3,180 2023 272 2024 136 Following five years - As of June 30, 2019, the assumed discount rates used for the supplemental plans range from 3.31% to 4.24%. 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. The Company granted a loan to the ESOP for the purchase of 1,453,209 shares of the Company’s common stock at a price of $10.00 per share. The loan obtained by the ESOP from the Company to purchase the common stock is payable annually over 15 years at a rate per annum equal to the Prime Rate, reset annually on January 1st (5.50% for 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 June 30, 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): 2019 2018 Allocated to participants 241,804 144,923 Unearned 1,211,405 1,308,286 Total ESOP shares 1,453,209 1,453,209 Fair value of unearned shares $ 24,531 $ 25,996 Total compensation expense recognized in connection with the ESOP for the year ended June 30, 2019 and 2018 was $1.9 million and $2.2 million, respectively.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Jun. 30, 2019
Banking And Thrift [Abstract]
Regulatory Matters	Note 15 . Regulatory Matters The following is a summary of the Bank’s actual capital amounts and ratios as of June 30, 2019 and 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. To Be Well Capitalized For Capital Under Prompt Adequacy Corrective Action Bank Actual Purposes Provisions Amount Ratio Amount Ratio Amount Ratio June 30, 2019: PCSB Bank Leverage (Tier 1) $ 209,885 13.8 % $ 60,774 4.0 % $ 75,968 5.0 % Risk-based: Common Tier 1 209,885 18.0 52,579 4.5 75,948 6.5 Tier 1 209,885 18.0 70,105 6.0 93,474 8.0 Total 215,549 18.4 93,474 8.0 116,842 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 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 June 30, 2019 and 2018, the Bank met all capital adequacy requirements to which it was subject, including the capital conservation buffer of 2.5% as of June 30, 2019 and 1.875% as of June 30, 2018. 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.

Related Party Disclosures

Related Party Disclosures	12 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Related Party Disclosures	Note 16. Related Party Disclosures The Company's authority to extend credit to its directors, executive officers, and stockholders owning 10% or more of the Holding Company's outstanding common stock, as well as to entities controlled by such persons, is additionally governed by the requirements of Sections 22(g) and 22(h) of the FRA and Regulation O of the FRB enacted thereunder. Among other matters, these provisions require that extensions of credit to insiders: (i) be made on terms substantially the same as, and follow credit underwriting procedures not less stringent than, those prevailing for comparable transactions with unaffiliated persons and that do not involve more than the normal risk of repayment or present other unfavorable features; and (ii) not exceed certain amount limitations individually and in the aggregate, which limits are based, in part, on the amount of the bank's capital. Regulation O additionally requires that extensions of credit in excess of certain limits be approved in advance by the bank's board of directors. New York banking regulations impose certain limits and requirements on various transactions with "insiders," as defined in the New York banking regulations to include certain executive officers, directors and principal stockholders. For the years ended June 30, 2019 and 2018, the Company and the Bank had no insider loans.

Derivatives and Hedging

Derivatives and Hedging	12 Months Ended
	Jun. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	Note 17 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 June 30, 2019: June 30, 2019 (dollars in thousands) Notional amounts $ 68,535 Weighted average pay rates 3.89 % Weighted average receive rates 3.89 % Weighted average maturity 9.84 years Fair value of combined interest rate swaps $ -

Revenue From Contracts With Cus

Revenue From Contracts With Customers	12 Months Ended
	Jun. 30, 2019
Revenue From Contract With Customer [Abstract]
Revenue From Contracts With Customers	Note 18 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 years ended June 30, 2019 and 2018, fees and services charges totaled $1.8 million and $1.5 million, respectively, of which and $1.6 million and $1.3 million, respectively, were revenue streams within the scope of the accounting standard. 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 years ended June 30, 2019 and 2018, fees and service charges on deposit accounts were $1.2 million and $882,000, 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 years ended June 30, 2019 and 2018, interchange income was $432,000 and $390,000, 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 year ended June 30, 2019, the Company recorded $24,000 gain on sale of foreclosed real estate, compared to $7,000 loss on sale of foreclosed real estate recorded in the prior year.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	Note 19. Stock-Based Compensation On October 24, 2018, the Company’s shareholders approved the PCSB Financial Corporation 2018 Equity Incentive Plan (the “Plan”), which permits the grant of stock options and restricted stock and/or restricted stock units. The total number of shares that may be granted under the Plan is 2,543,115, of which 1,816,511 shares may be granted as stock options and 726,604 shares may be granted as restricted stock and restricted stock units. Total compensation cost that has been charged against income for the Plan was $2.1 million for the year ended June 30, 2019. No compensation cost was incurred for the year ended June 30, 2018. Restricted Stock Awards RSAs provide for the issuance of shares to both employees and non-employee directors. These awards vest over a 5-year period, with 20% vesting each year on the anniversary of the award. All awards were made at the fair value of common stock on the grant date. Compensation expense is recognized over the vesting period of the awards based on the fair value of the stock at grant date. The fair value of the stock was determined to be the closing price of the stock on the NASDAQ exchange. Total shares available for grant under the Plan are 726,604, of which 547,185 shares were issued as of June 30, 2019. The following table presents a summary of RSA activity during the period ended June 30, 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 June 30, 2019 547,185 $ 19.02 As of June 30, 2019, there was $9.1 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 4.4 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 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 (in years) 6.5 Expected stock price volatility 18.26 % Dividend yield 0.63 % Weighted average fair value of options granted $ 4.61 As of June 30, 2019, there was $5.4 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 4.4 years. Total shares available for grant under the Plan are 1,816,511, of which 1,339,293 shares were issued as of June 30, 2019. 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 June 30, 2019 1,339,293 $ 19.04 9.4 $ 1,625 Exercisable at June 30, 2019 - $ - $ -

Parent Company Only Financial S

Parent Company Only Financial Statements	12 Months Ended
	Jun. 30, 2019
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Parent Company Only Financial Statements	Note 20 The following are the financial statements of the Company (Parent only) as of and for the years ended June 30, 2019 and 2018 (in thousands). June 30, 2019 2018 Assets Cash and cash equivalents $ 55,626 $ 72,140 Investment in Bank 211,205 200,058 ESOP loan receivable 12,594 13,563 Other assets 1,936 1,798 Total assets $ 281,361 $ 287,559 Liabilities and shareholders' equity Other liabilities $ 54 $ - Shareholders' equity 281,307 287,559 Total liabilities and shareholders' equity $ 281,361 $ 287,559 Years Ended June 30, 2019 2018 Interest income $ 715 $ 668 Equity in income of Bank 8,318 7,188 Other non-interest expenses 715 689 Income before income tax 8,318 7,167 Income tax expense - 563 Net income $ 8,318 $ 6,604 Year Ended June 30, 2019 2018 Cash Flows from Operating Activities: Net income $ 8,318 $ 6,604 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Equity in income of Bank (8,318 ) (7,188 ) Deferred tax expense 213 733 Net increase in accrued interest receivable (89 ) (230 ) Other adjustments, principally net changes in other assets and liabilities 1,932 (569 ) Net cash provided by (used in) operating activities 2,056 (650 ) Cash Flows from Investing Activities: Decrease in ESOP loan 969 969 Net cash provided by investing activities 969 969 Cash Flows from Financing Activities: Common stock dividends declared (2,183 ) (504 ) Allocation of ESOP shares 949 1,069 Issuance of common stock - (17 ) Repurchase of common stock (18,305 ) - Net cash (used in) provided by financing activities (19,539 ) 548 Net (decrease) increase in cash and cash equivalents (16,514 ) 867 Cash and cash equivalents at beginning of year 72,140 71,273 Cash and cash equivalents at end of year $ 55,626 $ 72,140

Subsequent Events

Subsequent Events	12 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 21 . Subsequent Events Subsequent to June 30, 2019, and through September 6, 2019, the Company repurchased 148,500 shares of common stock, at an average cost of $19.54 per share.

Basis of Presentation (Policies

Basis of Presentation (Policies)	12 Months Ended
	Jun. 30, 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 state-chartered commercial bank and its deposits are insured up to applicable limits by the Deposit Insurance Fund of the Federal Deposit Insurance Corporation (“FDIC”). The Bank’s primary regulators are the FDIC and the New York State Department of Financial Services.
Basis of Presentation	Basis of Presentation UpCounty Realty Corp. (formerly PCSB Realty Ltd.)
Use of Estimates	Use of Estimates
Cash Flows	Cash Flows
Investment Securities	Investment Securities Debt securities available for sale are reported at fair value. Unrealized gains and losses on debt securities available for sale are excluded from earnings and reported as accumulated other comprehensive income or loss (a separate component of equity), net of related income taxes. Premiums and discounts on debt securities are amortized to interest income on a level-yield basis over the terms of the securities. Realized gains and losses on sales of debt securities are determined based on the amortized cost of the specific securities sold. Management evaluates securities for other-than-temporary impairment (OTTI) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis.
Loans Receivable	Loans Receivable Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, unamortized purchase premiums and discounts, and an allowance for loan losses. Interest income is accrued on the unpaid principal balance. Interest income on loans is discontinued at the time the loan is ninety days delinquent unless the loan is well secured and in process of collection. Loan purchase premiums and discounts are amortized over the contractual term of the loans Loan origination fees and certain direct loan origination costs are deferred and amortized to interest income as an adjustment to yield over the contractual term of the loans. Unamortized fees and costs on prepaid loans are recognized in interest income at the time of prepayment.
Purchased Credit Impaired Loans	Purchased Credit Impaired Loans Such purchased credit impaired loans are accounted for individually or aggregated into pools of loans based on common risk characteristics, such as credit score, loan type, and date of origination. The Company estimates the amount and timing of expected cash flows for each loan or pool, and the expected cash flows in excess of amount paid is recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loan’s or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, an allowance is recorded as a provision for loan losses. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income.
Allowance For Loan Losses	Allowance for Loan Losses Establishing the allowance for loan losses involves significant management judgments utilizing the best information available at the time. Those judgments are subject to further examination by the Bank’s regulators. Future adjustments to the allowance for loan losses may be necessary based on changes in economic and real estate market conditions, further information obtained regarding known problem loans, the identification of additional problem loans, and other factors. The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for loans evaluated under the Company’s normal loan review procedures. Loans evaluated on an individual basis for impairment may be measured by the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. If the fair value of an impaired loan is less than its recorded investment, an impairment allowance is recognized and included in the allowance for loan losses. Troubled debt restructurings are separately identified for impairment disclosures and are initially measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported at the fair value of the collateral. For troubled debt restructurings that subsequently default, the Company determines the amount of reserve in accordance with the accounting policy for the allowance for loan losses. The general component of the allowance covers non-impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Company over a thirty-six month period, with heaviest weight placed on the most recent periods. This actual loss experience is supplemented with other economic factors based on the risks present for each portfolio segment. These economic factors include consideration of the following: lending policies, underwriting, charge-off and collection procedures; national and local economic trends and conditions; trends in nature and volume of the loan portfolio; experience, ability, and depth of lending management and other relevant staff; trends in delinquencies, classified loans and restructurings; quality of the loan review system and Board oversight; value of underlying collateral for collateral dependent loans; existence and effect of concentrations and levels; and effects of external factors, such as competition, legal and regulatory factors. The following portfolio segments have been identified: residential, commercial mortgage, construction, commercial, home equity and consumer and overdrafts. The risk characteristics of each of the identified portfolio segments are as follows: Residential Loans – residential loans are generally made on the basis of the borrower’s ability to make repayment from his or her employment income or other income and are secured by real property whose value tends to be more easily ascertainable. Repayment of residential loans is subject to adverse employment conditions in the local economy leading to increased default rates and decreased market values from oversupply in a geographic area. In general, these loans depend on the borrower’s continuing financial stability and, therefore, are likely to be adversely affected by various factors, including job loss, divorce, illness, or personal bankruptcy. Furthermore, the application of various federal and state laws, including federal and state bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans. Commercial Mortgage – commercial mortgage loans, including multifamily real estate loans, are secured by multifamily and nonresidential real estate and generally have larger balances and involve a greater degree of risk than residential real estate loans. Repayment of commercial mortgage loans depend on the global cash flow analysis of the borrower and the net operating income of the property, the borrower’s expertise, credit history and profitability, and the value of the underlying property. Of primary concern in commercial real estate lending is the borrower’s creditworthiness and the cash flow generated from the property securing the loan. As a result, repayment of such loans may be subject, to a greater extent than residential real estate loans, to adverse conditions in the real estate market or the economy. Commercial real estate is also subject to adverse market conditions that cause a decrease in market value or lease rates, obsolescence in location or function and market conditions associated with over supply of units in a specific region. Construction – construction financing is generally considered to involve a higher degree of risk of loss than long-term financing on improved, occupied real estate. Risk of loss on a construction loan depends largely upon the accuracy of the initial estimate of the property’s value at completion of construction and the estimated cost of construction. During the construction phase, a number of factors could result in delays and cost overruns. If the estimate of construction costs proves to be inaccurate, additional funds may be required to be advanced in excess of the amount originally committed to permit completion of the building. If the estimate of value proves to be inaccurate, the value of the building may be insufficient to assure full repayment if liquidation is required. If foreclosure is required on a building before or at completion due to a default, there can be no assurance that all of the unpaid balance of, and accrued interest on, the loan as well as related foreclosure and holding costs will be recovered. Commercial – commercial loans are generally of higher risk than other types of loans and typically are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. As a result, the availability of funds for the repayment of commercial loans may depend substantially on the success of the business itself. Furthermore, any collateral securing such loans may depreciate over time, may be difficult to appraise, and may fluctuate in value. Home Equity Lines of Credit – home equity lines of credit consist of both fixed and variable interest rate products. These are primarily home equity loans to residential mortgage customers within our primary market area. These loans generally will not exceed a combined (i.e., first and second mortgage) loan-to-value ratio of 75% percent at origination. Consumer and overdraft loans – consumer loans generally have shorter terms and higher interest rates than one-to-four family mortgage loans. In addition, consumer loans expand the products and services we offer to better meet the financial services needs of our customers. Consumer loans generally involve greater credit risk than residential mortgage loans because of the difference in the underlying collateral. Repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment of the outstanding loan balance because of the greater likelihood of damage to, loss of, or depreciation in the underlying collateral. The remaining deficiency often does not warrant further substantial collection efforts against the borrower beyond obtaining a deficiency judgment. In addition, consumer loan collections depend on the borrower’s personal financial stability. Furthermore, the application of various federal and state laws, including federal and state bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans.
Foreclosed Real Estate	Foreclosed Real Estate
Federal Home Loan Bank (FHLB) Stock	Federal Home Loan Bank (FHLB) Stock
Premises and Equipment	Premises and Equipment
Bank Owned Life Insurance (BOLI)	Bank Owned Life Insurance (BOLI)
Goodwill And Other Intangible Assets	Goodwill and Other Intangible Assets Other intangible assets, consisting of a core deposit intangible asset arising from a whole bank acquisition, are amortized on an accelerated method over their estimated useful lives of 10 years.
Loan Commitments And Related Financial Instruments	Loan Commitments and Related Financial Instruments
Derivatives	Derivatives Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged. Net cash settlements on derivatives that do not qualify for hedge accounting are reported in non-interest income. Cash flows on hedges are classified in the cash flow statement the same as the cash flows of the items being hedged. The Company formally documents the relationship between derivatives and hedged items, as well as the risk management objective and the strategy for undertaking hedge transactions at the inception of the hedging relationship. The documentation includes linking fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items. The Company discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative is settled or terminates, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm, or treatment of the derivative as a hedge is no longer appropriate or intended. When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded as non-interest income. When a fair value hedge is discontinued, the hedged asset or liability is no longer adjusted for changes in fair value and the existing basis adjustment is amortized or accreted over the remaining life of the asset or liability. When a cash flow hedge is discontinued but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods which the hedged transactions will affect earnings.
Income Taxes	Income Taxes Deferred tax assets and liabilities are measured using the enacted tax rates expected to apply to taxable income in future years. The effect on deferred tax assets and liabilities of a change in tax laws or rates is recognized in the period that includes the enactment date of the change. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Company recognizes interest and/or penalties related to income tax matters in income tax expense.
Earnings Per Share	Earnings Per Share include stock options and unvested restricted stock. Earnings and dividends per share are restated for all stock splits and stock dividends through the date of the issuance of the financial statements.
Stock-Based Compensation	Stock-Based Compensation: Compensation cost is recognized for stock options and restricted stock awards issued to employees and non-employee directors based on the fair value of these awards at the grant date. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the date of grant is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. The Company’s policy is to recognize forfeitures as they occur.
Employee Benefit Plans	Employee Benefit Plans: Employee 401(k) expense is the amount of matching contributions. Pension expense is the net of service and interest cost, return on plan assets and amortization of gains and losses not immediately recognized. SERP expense is the net of interest cost and service cost, which allocates the benefits over years of service. The Holding Company and Bank maintain the PCSB Bank Employee Stock Ownership Plan (the “ESOP”). Compensation expense related to the ESOP is recorded during the period in which the shares become committed to be released to participants. The compensation expense is measured based upon the average fair market value of the stock during the period, and, to the extent that the fair value of the shares committed to be released differs from the original cost of such shares, the difference is recorded as an adjustment to additional paid-in capital.
Loss Contingencies	Loss Contingencies
Fair Value of Financial Instrument	Fair Value of Financial Instruments
Segment Reporting	Segment Reporting
Reclassification	Reclassifications
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 18. 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 non-service costs (credits) of $250,000 and $(184,000) to be included in other operating expense for the year ended June 30, 2019 and 2018, respectively. In November 2016, the FASB issued ASU 2016-18 “Statement of Cash Flows - Restricted Cash.” This ASU provides guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows. The amendments in this update require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The adoption of ASU 2016-18 on July 1, 2018 did not have a material impact on the Company’s consolidated financial statements. 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 longer than 12 months 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 Company currently leases eleven branches and two administrative offices. The Company adopted this standard and the related amendments (collectively "ASC 842") on July 1, 2019 and utilized the modified retrospective approach provided by ASU 2018-11, "Leases (Topic 842): Targeted Improvements," that allowed for a cumulative effect adjustment in the period of adoption. Under this method of adoption, the comparative information in the consolidated financial statements has not been revised and continues to be reported under the previously applicable lease accounting guidance (ASC 840). We also utilized the package of practical expedients permitted under the transition guidance which included the carry-forward of historical lease classification. We anticipate the adoption of ASU 2016-02 on July 1, 2019 will result in the establishment of a right to use asset and a corresponding lease obligation of no more than 1% of consolidated assets. There will be no impact on the Company’s consolidated results of operations as a result of this adoption. 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. Management is currently evaluating the impact that ASU 2016-13 will have on the Company’s consolidated financial position, results of operations and disclosures. In June 2019, the FASB voted to propose a delay for the implementation of the standard until January 2023 for certain companies, including small reporting companies (as defined by the SEC), non-SEC public companies and private companies. The Company currently qualifies as a small reporting company and would be subject to the proposed delay if approved. 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. Management elected to adopt ASU 2017-08 on July 1, 2019 which will result in no material impacts on the Company’s consolidated financial statements.

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Jun. 30, 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 Securities	The amortized cost, gross unrealized/unrecognized gains and losses and fair value of available for sale and held to maturity securities at June 30, 2019 and 2018 were as follows: June 30, 2019 Amortized Gross Unrealized/Unrecognized Fair Cost Gains Losses Value (in thousands) Available for sale: U.S. Government and agency obligations $ 37,027 $ 5 $ (121 ) $ 36,911 Corporate and other debt securities 8,349 20 (9 ) 8,360 Mortgage-backed securities – residential 27,115 23 (181 ) 26,957 Total available for sale $ 72,491 $ 48 $ (311 ) $ 72,228 Held to maturity: U.S. Government and agency obligations $ 96,545 $ 192 $ (246 ) $ 96,491 Corporate and other debt securities 34,033 133 (413 ) 33,753 Mortgage-backed securities – residential 133,602 818 (372 ) 134,048 Mortgage-backed securities – collateralized mortgage obligations 52,940 311 (147 ) 53,104 Mortgage-backed securities – commercial 28,425 451 (29 ) 28,847 Total held to maturity $ 345,545 $ 1,905 $ (1,207 ) $ 346,243 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 June 30, 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) 1 year or less $ 38,550 $ 38,429 $ 25,015 $ 24,950 1 to 5 years 62,995 63,055 20,361 20,321 5 to 10 years 25,033 24,701 - - Mortgage-backed securities and other 218,967 220,058 27,115 26,957 Total $ 345,545 $ 346,243 $ 72,491 $ 72,228
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 June 30, 2019 and 2018: June 30, 2019 Less than 12 months Greater than 12 months 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 $ - $ - $ 32,919 $ (121 ) $ 32,919 $ (121 ) Corporate and other debt securities - - 3,269 (9 ) 3,269 (9 ) Mortgage-backed securities – residential - - 24,000 (181 ) 24,000 (181 ) Total available for sale $ - $ - $ 60,188 $ (311 ) $ 60,188 $ (311 ) Held to maturity: U.S. Government and agency obligations $ - $ - $ 59,306 $ (246 ) $ 59,306 $ (246 ) Corporate and other debt securities 17,087 (413 ) - - 17,087 (413 ) Mortgage-backed securities – residential 1,666 (26 ) 54,648 (346 ) 56,314 (372 ) Mortgage-backed securities – collateralized mortgage obligations - - 29,372 (147 ) 29,372 (147 ) Mortgage-backed securities – commercial - - 6,972 (29 ) 6,972 (29 ) Total held to maturity $ 18,753 $ (439 ) $ 150,298 $ (768 ) $ 169,051 $ (1,207 ) June 30, 2018 Less than 12 months Greater than 12 months 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)	12 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable are summarized as follows (in thousands): June 30, 2019 2018 Mortgage loans: Residential $ 265,167 $ 250,578 Commercial 651,396 495,265 Construction 13,231 17,352 Net deferred loan origination costs 1,031 1,041 Total mortgages 930,825 764,236 Commercial and consumer loans: Commercial loans 133,614 104,135 Home equity lines of credit 33,204 37,395 Consumer and overdrafts 365 745 Net deferred loan origination costs 777 729 Total commercial and consumer loans 167,960 143,004 Total loans receivable 1,098,785 907,240 Allowance for loan losses (5,664 ) (4,904 ) Loans receivable, net $ 1,093,121 $ 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 years ended June 30, 2019 and 2018 (in thousands): For the year ended June 30, 2019 Beginning Allowance Provision (Credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 386 $ (33 ) $ - $ 10 $ 363 Commercial 3,073 894 (114 ) - 3,853 Construction 505 (442 ) - 96 159 Commercial loans 780 348 - 2 1,130 Home equity lines of credit 80 (15 ) - - 65 Consumer and overdrafts 7 31 (34 ) 7 11 Acquired: Residential 73 10 - - 83 Commercial - 15 (15 ) - - Total $ 4,904 $ 808 $ (163 ) $ 115 $ 5,664 For the year ended June 30, 2018 Beginning Allowance Provision (Credit) Charge-offs Recoveries Ending Allowance Originated: Residential $ 360 $ 161 $ (136 ) $ 1 $ 386 Commercial 2,589 114 - 370 3,073 Construction 1,150 352 (997 ) - 505 Commercial loans 949 (335 ) (54 ) 220 780 Home equity lines of credit 76 45 (60 ) 19 80 Consumer and overdrafts - 30 (23 ) - 7 Acquired: Residential 26 47 - - 73 Total $ 5,150 $ 414 $ (1,270 ) $ 610 $ 4,904
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 June 30, 2019 and 2018 (in thousands): June 30, 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 $ 1,774 $ 262,124 $ 1,269 $ 265,167 $ 130 $ 233 $ 83 $ 446 Commercial 1,418 649,088 890 651,396 - 3,853 - 3,853 Construction - 13,231 - 13,231 - 159 - 159 Commercial loans 2,016 131,598 - 133,614 39 1,091 - 1,130 Home equity lines of credit 689 32,359 156 33,204 4 61 - 65 Consumer and overdrafts - 365 - 365 - 11 - 11 Total $ 5,897 $ 1,088,765 $ 2,315 $ 1,096,977 $ 173 $ 5,408 $ 83 $ 5,664 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 and for the years ended June 30, 2019 and 2018 (in thousands): June 30, 2019 Unpaid Principal Balance Recorded Investment Allowance for loan losses With no related allowance recorded: Residential $ 1,061 $ 1,028 $ - Commercial 1,471 1,418 - Commercial loans 2,007 1,836 - Home equity lines of credit 750 678 - With an allowance recorded: Residential 723 746 130 Commercial loans 180 180 39 Home equity lines of credit 11 11 4 Total $ 6,203 $ 5,897 $ 173 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 an 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	For the year ended For the year ended June 30, 2019 June 30, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Residential $ 1,377 $ 20 $ 3,041 $ 184 Commercial 1,496 51 2,350 248 Construction - - 93 17 Commercial loans 2,064 200 3,457 1,049 Home equity lines of credit 577 7 507 22 With an allowance recorded: Residential 753 14 453 15 Construction 869 - 2,720 - Commercial loans 50 11 1,491 66 Home equity lines of credit 11 - 11 - Total $ 7,197 $ 303 $ 14,123 $ 1,601
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 still on accrual status, by class of loans as of June 30, 2019 and 2018 (in thousands): Loans Past Due Over 90 Days Nonaccrual and Still Accruing June 30, June 30, June 30, June 30, 2019 2018 2019 2018 Originated: Residential $ 536 $ 604 $ - $ - Commercial - 262 - - Construction - 2,260 - - Commercial loans 150 788 - - Home equity lines of credit 383 45 - - Consumer and overdrafts - - 1 - Acquired: Residential 795 1,308 - - Commercial 568 532 - - Home equity lines of credit 294 303 - - Total $ 2,726 $ 6,102 $ 1 $ -
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 June 30, 2019 and 2018 (in thousands): June 30, 2019 30-59 60-89 90 Days or Days Past Days Past More Past Total Past Due Due Due Due Current Total Originated: Residential $ - $ - $ 86 $ 86 $ 217,970 $ 218,056 Commercial - - - - 600,675 600,675 Construction - - - - 13,231 13,231 Commercial loans - 150 - 150 133,286 133,436 Home equity lines of credit 344 - 312 656 28,767 29,423 Consumer and overdrafts - - 1 1 348 349 Total originated 344 150 399 893 994,277 995,170 Acquired: Residential 220 116 709 1,045 46,066 47,111 Commercial - - 568 568 50,153 50,721 Commercial loans - - - - 178 178 Home equity lines of credit - 67 296 363 3,418 3,781 Consumer and overdrafts - - - - 16 16 Total acquired 220 183 1,573 1,976 99,831 101,807 Total $ 564 $ 333 $ 1,972 $ 2,869 $ 1,094,108 $ 1,096,977 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 Loans by Class Modified in Troubled Debt Restructurings	The following table presents loans by modified in troubled debt restructurings that occurred during the years ended June 30, 2019 and 2018 (dollars in thousands): Number of loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Year Ended June 30, 2019 Residential mortgage 3 $ 1,115 $ 1,110 Home equity lines of credit 1 73 73 Total 4 $ 1,188 $ 1,183 Year Ended June 30, 2018 Commercial loans 1 $ 275 $ 289 Total 1 $ 275 $ 289
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): June 30, 2019 Pass Special Mention Substandard Total Originated: Residential $ 216,438 $ 1,071 $ 547 $ 218,056 Commercial 600,216 339 120 600,675 Construction 13,231 - - 13,231 Commercial loans 123,361 6,423 3,652 133,436 Home equity lines of credit 28,996 67 360 29,423 Consumer and overdrafts 349 - - 349 Total originated 982,591 7,900 4,679 995,170 Acquired: Residential 44,959 211 1,941 47,111 Commercial 45,726 3,537 1,458 50,721 Commercial loans 178 - - 178 Home equity lines of credit 3,331 68 382 3,781 Consumer and overdrafts 16 - - 16 Total acquired 94,210 3,816 3,781 101,807 Total $ 1,076,801 $ 11,716 $ 8,460 $ 1,096,977 June 30, 2018 Pass Special Mention Substandard 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 follows (in thousands): June 30, 2019 2018 Residential $ 1,186 $ 1,232 Commercial 890 1,477 Home equity lines of credit 156 168 Carrying amount, net of allowance of $83 and $73, respectively $ 2,232 $ 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): Year ended June 30, 2019 2018 Beginning balance $ 245 $ 403 New loans acquired - - Accretion income (53 ) (70 ) Reclassification from non-accretable difference - 5 Disposals - (93 ) Ending balance $ 192 $ 245

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Jun. 30, 2018
Property Plant And Equipment [Abstract]
Summary of Premises and Equipment	Premises and equipment are summarized as follows at June 30 (in thousands): 2019 2018 Land $ 1,997 $ 1,997 Building and Leasehold improvements 13,753 13,430 Furniture, fixtures and equipment 6,808 6,096 Construction and improvements in process 15 355 22,573 21,878 Less: accumulated depreciation and amortization (10,771 ) (10,280 ) Total Bank premises and equipment, net $ 11,802 $ 11,598

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Change in Goodwill	The change in goodwill during the years ended June 30, 2019 and 2018 are as follows (in thousands): 2019 2018 Balance at July 1, $ 6,106 $ 6,106 Impairment - - Total at June 30, $ 6,106 $ 6,106
Schedule of Acquired Intangible Assets	Acquired Intangible Assets: Acquired intangible assets were as follows at June 30 (in thousands): 2019 2018 Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortized intangible assets: Core deposit intangible $ 887 $ (564 ) $ 887 $ (454 )
Schedule of Estimated Amortization Expense	Estimated amortization expense for each of the next five fiscal years ended June 30 (in thousands): 2020 $ 94 2021 78 2022 62 2023 46 2024 and after 43

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Jun. 30, 2019
Deposits [Abstract]
Summary of Deposit Balances	Deposit balances are summarized as follows at June 30, 2019 and 2018 (in thousands): 2019 2018 Demand $ 141,379 $ 131,883 NOW Accounts 123,069 117,875 Money market accounts 148,134 49,885 Savings 357,844 465,441 Time deposits 455,395 392,373 Total $ 1,225,821 $ 1,157,457
Scheduled Maturities of Time Deposits	Scheduled maturities of time deposits were as follows as of June 30, 2019 and 2018 (in thousands): 2019 2018 Within 1 year $ 221,832 $ 183,276 1 year to 2 years 112,394 49,350 2 years to 3 years 41,211 56,746 3 years to 4 years 33,538 56,458 4 years to 5 years 46,420 46,339 Thereafter - 204 Total $ 455,395 $ 392,373

FHLB and Other Borrowings (Tabl

FHLB and Other Borrowings (Tables)	12 Months Ended
	Jun. 30, 2019
Federal Home Loan Banks [Abstract]
Maturity Schedule of Advances	The maturity schedule of advances is summarized as follows as of June 30 (dollars in thousands): 2019 2018 Amount Due Weighted Avg. Rate Amount Due Weighted Avg. Rate Within 1 year $ 65,128 2.29 % $ 10,125 1.70 % 1 year to 2 years 30,131 2.10 5,128 1.81 2 years to 3 years 7,635 3.22 131 2.62 3 years to 4 years 138 2.62 135 2.62 4 years to 5 years 5,142 3.31 138 2.62 Thereafter 3,042 2.62 3,184 2.62 Total $ 111,216 2.36 % $ 18,841 1.91 %

Commitment and Contingencies (T

Commitment and Contingencies (Tables)	12 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Schedule of Contract Amounts of Credit-related Financial Instruments	The contract amounts of credit-related financial instruments at June 30, 2019 and 2018, are summarized below (in thousands): 2019 2018 Commitments to originate loans $ 136,770 $ 102,644 Unused lines of credit 52,644 56,553 Standby letter of credit 1,688 1,420
Summary of Rent Commitments Before Considering Renewal Options	Rent commitments, before considering renewal options that generally are present, were as follows as of June 30, 2019 (in thousands): Within 1 year $ 1,733 1 year to 2 years 1,794 2 year to 3 years 1,770 3 year to 4 years 1,683 4 year to 5 years 1,313 Thereafter 5,647 Total $ 13,940

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Jun. 30, 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 (1) Unrealized loss on pension benefits (2) Unrealized loss on SERP benefits (2) Total Balance at July 1, 2018 $ (1,536 ) $ (5,150 ) $ (264 ) $ (6,950 ) Other comprehensive income (loss) before reclassifications 1,741 (486 ) (19 ) 1,236 Amounts reclassified from accumulated other comprehensive (loss) income (62 ) 1,144 36 1,118 Tax effect (352 ) (139 ) (3 ) (494 ) Net other comprehensive income 1,327 519 14 1,860 Balance at June 30, 2019 $ (209 ) $ (4,631 ) $ (250 ) $ (5,090 ) Net unrealized gain (loss) on available for sale securities (1) Unrealized loss on pension benefits (2) Unrealized loss on SERP benefits (2) Total Balance at July 1, 2017 $ 37 $ (5,002 ) $ (250 ) $ (5,215 ) Other comprehensive (loss) income before reclassifications (1,835 ) 335 10 (1,490 ) Amounts reclassified from accumulated other comprehensive (loss) income (164 ) 725 34 595 Tax effect 558 (270 ) (11 ) 277 Net other comprehensive (loss) income (1,441 ) 790 33 (618 ) Reclassification of certain tax effects on other comprehensive (loss) (3) (132 ) (938 ) (47 ) (1,117 ) Balance at June 30, 2018 $ (1,536 ) $ (5,150 ) $ (264 ) $ (6,950 ) (1) (2) ( 3 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	The following table provides factors used in the earnings per share computation for the years ended June 30, 2019 and 2018. Year Ended June 30, 2019 2018 (amounts in thousands, except share and per share data) Net income applicable to common stock $ 8,318 $ 6,604 Average number of common shares outstanding 17,752,473 18,165,110 Less: Average unallocated ESOP shares (1,259,713 ) (1,362,216 ) Average number of common shares outstanding used to calculate basic earnings per common share 16,492,760 16,802,894 Effect of equity-based awards 34,357 - Average number of common shares outstanding used to calculate diluted earnings per common share 16,527,117 16,802,894 Earnings per Common share: Basic $ 0.50 $ 0.39 Diluted $ 0.50 $ 0.39

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Jun. 30, 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 June 30, 2019 Measured on a recurring basis: Available for sale securities: U.S. Government and agency obligations $ - $ 36,911 $ - $ 36,911 Corporate and other debt securities - 8,360 - 8,360 Mortgage-backed securities – residential - 26,957 - 26,957 Derivatives - interest rate contracts - 1,339 - 1,339 Total assets at fair value $ - $ 73,567 $ - $ 73,567 Derivatives - interest rate contracts $ - $ 1,339 $ - $ 1,339 Total liabilities at fair value $ - $ 1,339 $ - $ 1,339 Measured on a non-recurring basis: Impaired loans: Residential mortgages $ - $ - $ 616 $ 616 Commercial loans - - 141 141 Home equity lines of credit - - 7 7 Foreclosed real estate - - 653 653 Total assets at fair value $ - $ - $ 1,417 $ 1,417 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 June 30, 2019 and 2018 (dollars in thousands): Valuation Unobservable Range or Fair Value Technique(s) Input(s) Rate Used June 30, 2019 Impaired loans - residential mortgages $ 616 Discounted cash flow Discount rate 5.4% to 6.3% Impaired loans - commercial loans 141 Discounted cash flow Discount rate 6.0% to 7.0% Impaired loans - home equity lines of credit 7 Discounted cash flow Discount rate 6.2% 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 June 30, 2019 Financial assets: Cash and cash equivalents $ 60,029 $ 60,029 $ - $ - $ 60,029 Investment securities held to maturity 345,545 - 346,243 - 346,243 Investment securities available for sale 72,228 - 72,228 - 72,228 Loans receivable, net 1,093,121 - - 1,092,878 1,092,878 Accrued interest receivable 4,797 - 1,330 3,467 4,797 FHLB stock 6,255 N/A N/A N/A N/A Derivative assets - interest rate contracts 1,339 - 1,339 - 1,339 Financial liabilities: Demand, NOW, money market deposits and savings accounts 770,426 770,426 - - 770,426 Accrued interest payable 209 16 193 209 Time deposits 455,395 - 460,554 - 460,554 Mortgage escrow funds 9,355 9,355 - - 9,355 FHLB advances 111,216 - 111,818 - 111,818 Derivative liabilities - interest rate contracts 1,339 - 1,339 - 1,339 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 105,504 - 105,504 - 105,504 Loans receivable, net 902,336 - - 882,319 882,319 Accrued interest receivable 4,358 - 1,402 2,956 4,358 FHLB 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 Accrued interest payable 154 7 147 154 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

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense (benefit) are summarized as follows for the years ended June 30 (in thousands): 2019 2018 Current tax expense (benefit) Federal $ 2,624 $ 2,577 State 412 20 3,036 2,597 Deferred tax expense (benefit) Federal (329 ) 2,414 State (91 ) 313 (420 ) 2,727 State tax valuation allowances, net of federal benefit 70 (302 ) Total $ 2,686 $ 5,022
Schedule of Effective Income Tax Rate Reconciliation	Effective tax rates differ from the federal statutory rate applied to income before income taxes due to the following (dollars in thousands): 2019 2018 Federal statutory rate 21.00 % 28.06 % Tax at federal statutory rate $ 2,311 $ 3,262 State Taxes, net of federal benefit 310 24 Tax-exempt income (66 ) (61 ) BOLI income (114 ) (157 ) ESOP Compensation 199 300 Deferred tax re-remeasurement charge - 1,570 Other, net 46 84 Total $ 2,686 $ 5,022 Effective tax rate 24.41 % 43.20 %
Schedule of Deferred Tax Assets and Liabilities	Year-end deferred tax assets and liabilities were due to the following (in thousands): 2019 2018 Deferred Tax Assets: Allowance for Loan Losses $ 1,419 $ 1,222 Other comprehensive loss (defined benefit plans) 1,298 1,439 Deferred compensation 879 836 Charitable contribution carryforward 671 949 Stock based compensation 498 - Depreciation of premises and equipment 416 413 Other comprehensive loss (securities) 55 408 Other 544 611 Total deferred tax assets 5,780 5,878 Deferred Tax Liabilities: Prepaid pension costs 2,416 2,424 Deferred loan costs and fees, net 466 451 Other - 31 Total deferred tax liabilities 2,882 2,906 Deferred tax asset valuation allowance (420 ) (350 ) Net deferred tax asset $ 2,478 $ 2,622

Post-Retirement Benefits (Table

Post-Retirement Benefits (Tables)	12 Months Ended
	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Shares Held by ESOP	Shares held by the ESOP include the following (dollars in thousands): 2019 2018 Allocated to participants 241,804 144,923 Unearned 1,211,405 1,308,286 Total ESOP shares 1,453,209 1,453,209 Fair value of unearned shares $ 24,531 $ 25,996
Employee Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Summary of Plan's Funded Status	The following is a summary of the plan’s funded status as of June 30, 2019 and 2018 (the measurement date for financial reporting purposes) (in thousands): 2019 2018 Change in benefit obligation: Beginning benefit obligation $ 24,764 $ 25,614 Interest Cost 1,000 968 Actuarial Loss (327 ) 8 Benefits Paid (929 ) (868 ) Settlements (2,152 ) (958 ) Ending benefit obligation 22,356 24,764 Change in plan assets, at fair value: Beginning plan assets 27,975 27,444 Actual return 1,239 2,357 Benefits paid (929 ) (868 ) Settlements (2,152 ) (958 ) Ending Plan assets 26,133 27,975 Funded Status $ 3,777 $ 3,211 Accumulated Benefit Obligation $ 22,356 $ 24,764
Summary of Net Period Pension Cost (Benefit), Contributions and Benefits Paid	The following is a summary of net period pension cost (benefit), contributions and benefits paid for the years ended June 30 (in thousands): 2019 2018 Net period pension cost (benefit) $ 92 $ (321 ) Benefits paid 929 868
Schedule of Net Periodic Pension Cost and Other Amounts Recognized in Other Comprehensive Income	Net periodic pension cost and other amounts recognized in other comprehensive income for the years ended June 30 (in thousands): 2019 2018 Interest cost $ 1,000 $ 968 Expected return on plan assets (2,052 ) (2,014 ) Amortization of prior net loss 1,144 725 Net periodic cost (benefit) $ 92 $ (321 )
Schedule of Benefit Payments which Reflects Expected Future Service	The following benefit payments are expected for the years ending June 30, (in thousands): 2020 $ 1,217 2021 1,239 2022 1,275 2023 1,312 2024 1,315 Following five years 6,027
Schedule of Weighted-Average Assumptions Used to Determine Net Periodic Pension Cost	Weighted-average assumptions used to determine net periodic pension cost are described in the table below. Year ended June 30, 2019 2018 Discount Rate 3.31 % 3.87 % Expected return on plan assets 7.50 % 7.50 %
Schedule of Actual Pension Plan Asset Allocation and Target Allocation by Asset Category	The Company’s actual pension plan asset allocation and target allocation by asset category are as follows: Percentage of Plan Target Assets at Year-End Asset Category Allocation 2019 2018 Equity mutual funds and common/collective trusts 65 % 60 % 67 % Fixed income common/collective trusts 34 % 37 % 32 % Cash equivalents 1 % 3 % 1 % Total 100 % 100 % 100 %
Schedule of Fair Value of Plan Assets	The fair value of the plan assets at June 30, 2019 and 2018, by asset category, is as follows (in thousands): Fair Value Measurements Using Quoted Prices Significant In Active Other Significant Markets for Observable Unobservable Carrying Identical Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) June 30, 2019 Plan assets Equity mutual funds and common/collective trusts $ 15,837 $ - $ 15,837 $ - Fixed income common/collective trusts 9,618 - 9,618 - Cash equivalents 678 678 - - Total $ 26,133 $ 678 $ 25,455 $ - June 30, 2018 Plan assets Equity mutual funds and common/collective trusts $ 18,914 $ - $ 18,914 $ - Fixed income common/collective trusts 8,893 - 8,893 - Cash equivalents 168 168 - - Total $ 27,975 $ 168 $ 27,807 $ -
Supplemental Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Periodic Pension Cost and Other Amounts Recognized in Other Comprehensive Income	Net periodic pension cost and other amounts recognized in other comprehensive income for the years ended June 30 (in thousands): 2019 2018 Service cost $ 455 $ 518 Interest cost 122 103 Amortization of prior net loss 36 34 Net periodic cost $ 613 $ 655
Schedule of Benefit Payments which Reflects Expected Future Service	The following benefit payments, which reflect expected future service, are expected for the years ending June 30 (in thousands): 2020 $ 272 2021 272 2022 3,180 2023 272 2024 136 Following five years -

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Jun. 30, 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 June 30, 2019 and 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. To Be Well Capitalized For Capital Under Prompt Adequacy Corrective Action Bank Actual Purposes Provisions Amount Ratio Amount Ratio Amount Ratio June 30, 2019: PCSB Bank Leverage (Tier 1) $ 209,885 13.8 % $ 60,774 4.0 % $ 75,968 5.0 % Risk-based: Common Tier 1 209,885 18.0 52,579 4.5 75,948 6.5 Tier 1 209,885 18.0 70,105 6.0 93,474 8.0 Total 215,549 18.4 93,474 8.0 116,842 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

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	12 Months Ended
	Jun. 30, 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 June 30, 2019: June 30, 2019 (dollars in thousands) Notional amounts $ 68,535 Weighted average pay rates 3.89 % Weighted average receive rates 3.89 % Weighted average maturity 9.84 years Fair value of combined interest rate swaps $ -

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Jun. 30, 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 June 30, 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 June 30, 2019 547,185 $ 19.02
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 (in years) 6.5 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 June 30, 2019 1,339,293 $ 19.04 9.4 $ 1,625 Exercisable at June 30, 2019 - $ - $ -

Parent Company Only Financial_2

Parent Company Only Financial Statements (Tables)	12 Months Ended
	Jun. 30, 2019
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Consolidated Balance Sheets	The following are the financial statements of the Company (Parent only) as of and for the years ended June 30, 2019 and 2018 (in thousands). June 30, 2019 2018 Assets Cash and cash equivalents $ 55,626 $ 72,140 Investment in Bank 211,205 200,058 ESOP loan receivable 12,594 13,563 Other assets 1,936 1,798 Total assets $ 281,361 $ 287,559 Liabilities and shareholders' equity Other liabilities $ 54 $ - Shareholders' equity 281,307 287,559 Total liabilities and shareholders' equity $ 281,361 $ 287,559
Consolidated Statements of Operations	Years Ended June 30, 2019 2018 Interest income $ 715 $ 668 Equity in income of Bank 8,318 7,188 Other non-interest expenses 715 689 Income before income tax 8,318 7,167 Income tax expense - 563 Net income $ 8,318 $ 6,604
Consolidated Statements of Cash Flows	Year Ended June 30, 2019 2018 Cash Flows from Operating Activities: Net income $ 8,318 $ 6,604 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Equity in income of Bank (8,318 ) (7,188 ) Deferred tax expense 213 733 Net increase in accrued interest receivable (89 ) (230 ) Other adjustments, principally net changes in other assets and liabilities 1,932 (569 ) Net cash provided by (used in) operating activities 2,056 (650 ) Cash Flows from Investing Activities: Decrease in ESOP loan 969 969 Net cash provided by investing activities 969 969 Cash Flows from Financing Activities: Common stock dividends declared (2,183 ) (504 ) Allocation of ESOP shares 949 1,069 Issuance of common stock - (17 ) Repurchase of common stock (18,305 ) - Net cash (used in) provided by financing activities (19,539 ) 548 Net (decrease) increase in cash and cash equivalents (16,514 ) 867 Cash and cash equivalents at beginning of year 72,140 71,273 Cash and cash equivalents at end of year $ 55,626 $ 72,140

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2019USD ($)SubsidiarySegment	Jun. 30, 2018USD ($)
Basis Of Presentation [Line Items]
Number of subsidiaries | Subsidiary	2
Trading securities	$ 0
Other intangible assets, estimated useful life	10 years
Tax position recognized largest amount of tax benefit greater than likely realized percentage	50.00%
Tax benefit related to taxo positions	$ 0	$ 0
Financial Service Operations [Member]
Basis Of Presentation [Line Items]
Number of reportable operating segments | Segment	1
Maximum [Member] | Home Equity Lines of Credit [Member]
Basis Of Presentation [Line Items]
Loan-to-value ratio	75.00%

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jul. 01, 2019
ASU 2017-07 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Non-service costs (credits) included in other operating expense	$ 250,000	$ (184,000)
ASU 2016-02 [Member] | Subsequent Event [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Maximum percentage of consolidated assets for right of use asset			1.00%
Maximum percentage of consolidated assets for lease obligation			1.00%

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 Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	$ 72,491	$ 107,414
Available for sale, Gross Unrealized/Unrecognized Gains	48	81
Available for sale, Gross Unrealized/Unrecognized Losses	(311)	(2,023)
Available for sale, Fair Value	72,228	105,472
Held to maturity, Amortized Cost	345,545	353,183
Held to maturity, Gross Unrealized/Unrecognized Gains	1,905	43
Held to maturity, Gross Unrealized/Unrecognized Losses	(1,207)	(10,038)
Held to maturity, Fair Value	346,243	343,188
U.S. Government and Agency Obligations [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	37,027	64,389
Available for sale, Gross Unrealized/Unrecognized Gains	5
Available for sale, Gross Unrealized/Unrecognized Losses	(121)	(959)
Available for sale, Fair Value	36,911	63,430
Held to maturity, Amortized Cost	96,545	122,048
Held to maturity, Gross Unrealized/Unrecognized Gains	192
Held to maturity, Gross Unrealized/Unrecognized Losses	(246)	(2,274)
Held to maturity, Fair Value	96,491	119,774
Corporate and Other Debt Securities [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	8,349	8,406
Available for sale, Gross Unrealized/Unrecognized Gains	20
Available for sale, Gross Unrealized/Unrecognized Losses	(9)	(171)
Available for sale, Fair Value	8,360	8,235
Held to maturity, Amortized Cost	34,033	4,000
Held to maturity, Gross Unrealized/Unrecognized Gains	133
Held to maturity, Gross Unrealized/Unrecognized Losses	(413)	(126)
Held to maturity, Fair Value	33,753	3,874
Mortgage-backed Securities - Residential [Member]
Schedule of Investments [Line Items]
Available for sale, Amortized Cost	27,115	34,619
Available for sale, Gross Unrealized/Unrecognized Gains	23	81
Available for sale, Gross Unrealized/Unrecognized Losses	(181)	(893)
Available for sale, Fair Value	26,957	33,807
Held to maturity, Amortized Cost	133,602	140,478
Held to maturity, Gross Unrealized/Unrecognized Gains	818	32
Held to maturity, Gross Unrealized/Unrecognized Losses	(372)	(4,846)
Held to maturity, Fair Value	134,048	135,664
Mortgage-backed Securities - Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Held to maturity, Amortized Cost	52,940	53,547
Held to maturity, Gross Unrealized/Unrecognized Gains	311
Held to maturity, Gross Unrealized/Unrecognized Losses	(147)	(1,815)
Held to maturity, Fair Value	53,104	51,732
Mortgage-backed Securities - Commercial [Member]
Schedule of Investments [Line Items]
Held to maturity, Amortized Cost	28,425	33,110
Held to maturity, Gross Unrealized/Unrecognized Gains	451	11
Held to maturity, Gross Unrealized/Unrecognized Losses	(29)	(977)
Held to maturity, Fair Value	$ 28,847	$ 32,144

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2019USD ($)Security	Jun. 30, 2018USD ($)Security
Schedule of Investments [Line Items]
Sale of investment securities	$ 14,000,000	$ 8,600,000
Gross realized gains or losses on investment securities	62,000	236,000
Disposal of securities held to maturity		1,300,000
Gross realized gains from sale of securities held to maturity		72,000
Carrying amounts of securities pledged	166,400,000	140,500,000
Total investment securities	$ 417,773,000	$ 458,655,000
Number of securities in unrealized loss position | Security	135	254
Fair value of securities in unrealized loss position	$ 229,200,000	$ 438,500,000
Other-than-temporarily impaired securities | Security	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	Jun. 30, 2019	Jun. 30, 2018
Investments Debt And Equity Securities [Abstract]
Held to maturity, carrying amount, 1 year or less	$ 38,550
Held to maturity, carrying amount, 1 to 5 years	62,995
Held to maturity, carrying amount, 5 to 10 years	25,033
Held to maturity, carrying amount, Mortgage-backed securities and other	218,967
Held to maturity, Amortized Cost	345,545	$ 353,183
Held to maturity, fair value, 1 year or less	38,429
Held to maturity, fair value, 1 to 5 years	63,055
Held to maturity, fair value, 5 to 10 years	24,701
Held to maturity, fair value, Mortgage-backed securities and other	220,058
Held to maturity, fair value, Total	346,243	343,188
Available for sale, amortized cost, 1 year or less	25,015
Available for sale, amortized cost, 1 to 5 years	20,361
Available for sale, amortized cost, Mortgage-backed securities and other	27,115
Available for sale, Amortized Cost	72,491	107,414
Available for sale, fair value, 1 year or less	24,950
Available for sale, fair value, 1 to 5 years	20,321
Available for sale, fair value, Mortgage-backed securities and other	26,957
Available for sale, fair value, Total	$ 72,228	$ 105,472

Investment Securities - Investm

Investment Securities - Investment Securities with Fair Value and Unrealized Losses (Detail) - USD ($) $ in Thousands	Jun. 30, 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, Greater than 12 months, Fair Value	$ 60,188	38,363
Available for sale, Greater than 12 months, Unrealized/Unrecognized Loss	(311)	(927)
Available for sale, Total, Fair Value	60,188	99,780
Available for sale, Total, Unrealized/Unrecognized Loss	(311)	(2,023)
Held to maturity, Less than 12 months, Fair Value	18,753	205,419
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(439)	(5,801)
Held to maturity, Greater than 12 months, Fair Value	150,298	133,338
Held to maturity, Greater than 12 months,Unrealized/ Unrecognized Loss	(768)	(4,237)
Held to maturity, Total, Fair Value	169,051	338,757
Held to maturity, Total, Unrealized/ Unrecognized Loss	(1,207)	(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, Greater than 12 months, Fair Value	32,919	21,668
Available for sale, Greater than 12 months, Unrealized/Unrecognized Loss	(121)	(390)
Available for sale, Total, Fair Value	32,919	63,430
Available for sale, Total, Unrealized/Unrecognized Loss	(121)	(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, Greater than 12 months, Fair Value	59,306	71,611
Held to maturity, Greater than 12 months,Unrealized/ Unrecognized Loss	(246)	(1,403)
Held to maturity, Total, Fair Value	59,306	117,774
Held to maturity, Total, Unrealized/ Unrecognized Loss	(246)	(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, Greater than 12 months, Fair Value	3,269	1,977
Available for sale, Greater than 12 months, Unrealized/Unrecognized Loss	(9)	(23)
Available for sale, Total, Fair Value	3,269	8,235
Available for sale, Total, Unrealized/Unrecognized Loss	(9)	(171)
Held to maturity, Less than 12 months, Fair Value	17,087	3,874
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(413)	(126)
Held to maturity, Total, Fair Value	17,087	3,874
Held to maturity, Total, Unrealized/ Unrecognized Loss	(413)	(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, Greater than 12 months, Fair Value	24,000	14,718
Available for sale, Greater than 12 months, Unrealized/Unrecognized Loss	(181)	(514)
Available for sale, Total, Fair Value	24,000	28,115
Available for sale, Total, Unrealized/Unrecognized Loss	(181)	(893)
Held to maturity, Less than 12 months, Fair Value	1,666	102,496
Held to maturity, Less than 12 months, Unrealized/ Unrecognized Loss	(26)	(3,338)
Held to maturity, Greater than 12 months, Fair Value	54,648	32,490
Held to maturity, Greater than 12 months,Unrealized/ Unrecognized Loss	(346)	(1,508)
Held to maturity, Total, Fair Value	56,314	134,986
Held to maturity, Total, Unrealized/ Unrecognized Loss	(372)	(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, Greater than 12 months, Fair Value	29,372	20,608
Held to maturity, Greater than 12 months,Unrealized/ Unrecognized Loss	(147)	(931)
Held to maturity, Total, Fair Value	29,372	51,732
Held to maturity, Total, Unrealized/ Unrecognized Loss	(147)	(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, Greater than 12 months, Fair Value	6,972	8,629
Held to maturity, Greater than 12 months,Unrealized/ Unrecognized Loss	(29)	(395)
Held to maturity, Total, Fair Value	6,972	30,391
Held to maturity, Total, Unrealized/ Unrecognized Loss	$ (29)	$ (977)

Loans Receivable - Summary of L

Loans Receivable - Summary of Loans Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	$ 1,096,977	$ 905,470
Loans receivable	1,098,785	907,240
Allowance for loan losses	(5,664)	(4,904)	$ (5,150)
Loans receivable, net	1,093,121	902,336
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	265,167	250,578
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	651,396	495,265
Allowance for loan losses	(3,853)	(3,073)
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	13,231	17,352
Allowance for loan losses	(159)	(505)
Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	133,614	104,135
Allowance for loan losses	(1,130)	(780)
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	33,204	37,395
Allowance for loan losses	(65)	(80)
Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, before fees	365	745
Allowance for loan losses	(11)	(7)
Mortgage Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Net deferred loan origination costs	1,031	1,041
Loans receivable	930,825	764,236
Commercial and Consumer Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Net deferred loan origination costs	777	729
Loans receivable	$ 167,960	$ 143,004

Loans Receivable - Summary of A

Loans Receivable - Summary of Activity in Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	$ 4,904	$ 5,150
Allowance for Loan Losses, Provision (Credit)	808	414
Allowance for Loan Losses, Charge-offs	(163)	(1,270)
Allowance for Loan Losses, Recoveries	115	610
Allowance for Loan Losses, Ending Allowance	5,664	4,904
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	3,073
Allowance for Loan Losses, Ending Allowance	3,853	3,073
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	505
Allowance for Loan Losses, Ending Allowance	159	505
Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	780
Allowance for Loan Losses, Ending Allowance	1,130	780
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	65	80
Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	7
Allowance for Loan Losses, Ending Allowance	11	7
Originated [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	386	360
Allowance for Loan Losses, Provision (Credit)	(33)	161
Allowance for Loan Losses, Charge-offs		(136)
Allowance for Loan Losses, Recoveries	10	1
Allowance for Loan Losses, Ending Allowance	363	386
Originated [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	3,073	2,589
Allowance for Loan Losses, Provision (Credit)	894	114
Allowance for Loan Losses, Charge-offs	(114)
Allowance for Loan Losses, Recoveries		370
Allowance for Loan Losses, Ending Allowance	3,853	3,073
Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	505	1,150
Allowance for Loan Losses, Provision (Credit)	(442)	352
Allowance for Loan Losses, Charge-offs		(997)
Allowance for Loan Losses, Recoveries	96
Allowance for Loan Losses, Ending Allowance	159	505
Originated [Member] | Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	780	949
Allowance for Loan Losses, Provision (Credit)	348	(335)
Allowance for Loan Losses, Charge-offs		(54)
Allowance for Loan Losses, Recoveries	2	220
Allowance for Loan Losses, Ending Allowance	1,130	780
Originated [Member] | Home Equity Lines Of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	80	76
Allowance for Loan Losses, Provision (Credit)	(15)	45
Allowance for Loan Losses, Charge-offs		(60)
Allowance for Loan Losses, Recoveries		19
Allowance for Loan Losses, Ending Allowance	65	80
Originated [Member] | Consumer and Overdrafts [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	7
Allowance for Loan Losses, Provision (Credit)	31	30
Allowance for Loan Losses, Charge-offs	(34)	(23)
Allowance for Loan Losses, Recoveries	7
Allowance for Loan Losses, Ending Allowance	11	7
Acquired [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Beginning Allowance	73	26
Allowance for Loan Losses, Provision (Credit)	10	47
Allowance for Loan Losses, Ending Allowance	83	$ 73
Acquired [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Provision (Credit)	15
Allowance for Loan Losses, Charge-offs	$ (15)

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	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	$ 5,897	$ 9,114
Loans, Collectively Evaluated for Impairment	1,088,765	893,406
Total	1,096,977	905,470
Allowance for Loan Losses, Individually Evaluated for Impairment	173	451
Allowance for Loan Losses, Collectively Evaluated for Impairment	5,408	4,380
Allowance for Loan Losses, Total	5,664	4,904	$ 5,150
Originated And Acquired Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Total	5,664	4,904
Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	2,315	2,950
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	83	73
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	1,774	2,360
Loans, Collectively Evaluated for Impairment	262,124	246,913
Total	265,167	250,578
Allowance for Loan Losses, Individually Evaluated for Impairment	130	154
Allowance for Loan Losses, Collectively Evaluated for Impairment	233	232
Residential [Member] | Originated And Acquired Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Total	446	459
Residential [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	1,269	1,305
Allowance for Loan Losses, Acquired With Deteriorated Credit Quality	83	73
Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Individually Evaluated for Impairment	1,418	1,683
Loans, Collectively Evaluated for Impairment	649,088	492,105
Total	651,396	495,265
Allowance for Loan Losses, Collectively Evaluated for Impairment	3,853	3,073
Allowance for Loan Losses, Total	3,853	3,073
Commercial [Member] | Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, Acquired With Deteriorated Credit Quality	890	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	13,231	15,092
Total	13,231	17,352
Allowance for Loan Losses, Individually Evaluated for Impairment		276
Allowance for Loan Losses, Collectively Evaluated for Impairment	159	229
Allowance for Loan Losses, Total	159	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	2,016	2,451
Loans, Collectively Evaluated for Impairment	131,598	101,684
Total	133,614	104,135
Allowance for Loan Losses, Individually Evaluated for Impairment	39	9
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,091	771
Allowance for Loan Losses, Total	1,130	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	689	360
Loans, Collectively Evaluated for Impairment	32,359	36,867
Total	33,204	37,395
Allowance for Loan Losses, Individually Evaluated for Impairment	4	12
Allowance for Loan Losses, Collectively Evaluated for Impairment	61	68
Allowance for Loan Losses, Total	65	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	156	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	365	745
Total	365	745
Allowance for Loan Losses, Collectively Evaluated for Impairment	11	7
Allowance for Loan Losses, Total	$ 11	$ 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	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable Impaired [Line Items]
Impaired loans, unpaid principal balance	$ 6,203	$ 10,455
Impaired loans, recorded investment	5,897	9,114
Allowance for loan losses	173	451
Residential [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	1,061	1,659
Impaired loans with no related allowance recorded, recorded investment	1,028	1,576
Impaired loans with an allowance recorded, unpaid principal balance	723	742
Impaired loans with an allowance recorded, recorded investment	746	784
Impaired loans, recorded investment	1,774	2,360
Allowance for loan losses	130	154
Commercial [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	1,471	1,765
Impaired loans with no related allowance recorded, recorded investment	1,418	1,683
Impaired loans, recorded investment	1,418	1,683
Commercial Loans [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	2,007	2,254
Impaired loans with no related allowance recorded, recorded investment	1,836	2,098
Impaired loans with an allowance recorded, unpaid principal balance	180	353
Impaired loans with an allowance recorded, recorded investment	180	353
Impaired loans, recorded investment	2,016	2,451
Allowance for loan losses	39	9
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, unpaid principal balance	750	341
Impaired loans with no related allowance recorded, recorded investment	678	341
Impaired loans with an allowance recorded, unpaid principal balance	11	84
Impaired loans with an allowance recorded, recorded investment	11	19
Impaired loans, recorded investment	689	360
Allowance for loan losses	$ 4	12
Construction [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with an allowance recorded, unpaid principal balance		3,257
Impaired loans with an 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	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable Impaired [Line Items]
Impaired loans average recorded investment	$ 7,197	$ 14,123
Impaired loans interest income recognized	303	1,601
Residential [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	1,377	3,041
Impaired loans with no related allowance recorded, interest income recognized	20	184
Impaired loans with an allowance recorded, average recorded investment	753	453
Impaired loans with an allowance recorded, interest income recognized	14	15
Commercial [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	1,496	2,350
Impaired loans with no related allowance recorded, interest income recognized	51	248
Construction [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment		93
Impaired loans with no related allowance recorded, interest income recognized		17
Impaired loans with an allowance recorded, average recorded investment	869	2,720
Commercial Loans [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	2,064	3,457
Impaired loans with no related allowance recorded, interest income recognized	200	1,049
Impaired loans with an allowance recorded, average recorded investment	50	1,491
Impaired loans with an allowance recorded, interest income recognized	11	66
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, average recorded investment	577	507
Impaired loans with no related allowance recorded, interest income recognized	7	22
Impaired loans with an allowance recorded, average recorded investment	$ 11	$ 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	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 2,726	$ 6,102
Loans Past Due Over 90 Days and Still Accruing	1
Originated [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	536	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	150	788
Originated [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	383	45
Originated [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due Over 90 Days and Still Accruing	1
Acquired [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	795	1,308
Acquired [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	568	532
Acquired [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 294	$ 303

Loans Receivable - Additional I

Loans Receivable - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2019USD ($)Loan	Jun. 30, 2018USD ($)Loan
Loans and Leases Receivable Disclosure [Line Items]
Acquired loans accounted for as purchased credit impaired loans	$ 501,000	$ 1,800,000
Number of loans classified as troubled debt restructurings | Loan	14	12
Value of loans classified as troubled debt restructurings	$ 4,100,000	$ 3,800,000
Troubled debt restructuring with carrying amount	3,200,000	3,000,000
Specific reserves	$ 135,000	$ 139,000
Troubled debt restructurings for which there was a payment default | Loan		2
Commercial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Troubled debt restructurings for which there was a payment default | Loan		2
Increase allowance for loan loss		$ 2,000

Loans Receivable - Aging of Rec

Loans Receivable - Aging of Recorded Investment in Past Due Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,869	$ 7,147
Current	1,094,108	898,323
Total	1,096,977	905,470
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	564	30
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	333	626
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,972	6,491
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	265,167	250,578
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	651,396	495,265
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	13,231	17,352
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	133,614	104,135
Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	33,204	37,395
Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	365	745
Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	893	3,671
Current	994,277	766,209
Total	995,170	769,880
Originated [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	344
Originated [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	150	394
Originated [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	399	3,277
Originated [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	86	604
Current	217,970	194,986
Total	218,056	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	86	210
Originated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		262
Current	600,675	420,320
Total	600,675	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	13,231	15,092
Total	13,231	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	150	500
Current	133,286	102,767
Total	133,436	103,267
Originated [Member] | Commercial Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	150
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	656	45
Current	28,767	32,311
Total	29,423	32,356
Originated [Member] | Home Equity Lines Of Credit [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	344
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	312	45
Originated [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1
Current	348	733
Total	349	733
Originated [Member] | Consumer and Overdrafts [Member] | 90 Days or More 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	1,976	3,476
Current	99,831	132,114
Total	101,807	135,590
Acquired [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	220	30
Acquired [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	183	232
Acquired [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,573	3,214
Acquired [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,045	2,038
Current	46,066	52,950
Total	47,111	54,988
Acquired [Member] | Residential [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	220
Acquired [Member] | Residential [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	116	232
Acquired [Member] | Residential [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	709	1,806
Acquired [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	568	1,112
Current	50,153	73,571
Total	50,721	74,683
Acquired [Member] | Commercial [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	568	1,112
Acquired [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	178	868
Total	178	868
Acquired [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	363	326
Current	3,418	4,713
Total	3,781	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	67
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	16	12
Total	$ 16	$ 12

Loans Receivable - Summary of_4

Loans Receivable - Summary of Loans by Class Modified in Troubled Debt Restructurings (Detail) $ in Thousands	12 Months Ended
	Jun. 30, 2019USD ($)Loan	Jun. 30, 2018USD ($)Loan
Financing Receivable Modifications [Line Items]
Number of loans | Loan	4	1
Pre-Modification Outstanding Recorded Investment	$ 1,188	$ 275
Post-Modification Outstanding Recorded Investment	$ 1,183	$ 289
Residential [Member]
Financing Receivable Modifications [Line Items]
Number of loans | Loan	3
Pre-Modification Outstanding Recorded Investment	$ 1,115
Post-Modification Outstanding Recorded Investment	$ 1,110
Home Equity Lines Of Credit [Member]
Financing Receivable Modifications [Line Items]
Number of loans | Loan	1
Pre-Modification Outstanding Recorded Investment	$ 73
Post-Modification Outstanding Recorded Investment	$ 73
Commercial Loans [Member]
Financing Receivable Modifications [Line Items]
Number of loans | Loan		1
Pre-Modification Outstanding Recorded Investment		$ 275
Post-Modification Outstanding Recorded Investment		$ 289

Loans Receivable - Summary of R

Loans Receivable - Summary of Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,096,977	$ 905,470
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,076,801	888,108
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,716	1,984
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,460	15,378
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	265,167	250,578
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	651,396	495,265
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,231	17,352
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	133,614	104,135
Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	33,204	37,395
Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	365	745
Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	995,170	769,880
Originated [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	982,591	758,908
Originated [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,900	882
Originated [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,679	10,090
Originated [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	218,056	195,590
Originated [Member] | Residential [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	216,438	194,341
Originated [Member] | Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,071	571
Originated [Member] | Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	547	678
Originated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	600,675	420,582
Originated [Member] | Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	600,216	418,370
Originated [Member] | Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	339
Originated [Member] | Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	120	2,212
Originated [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,231	17,352
Originated [Member] | Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,231	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	133,436	103,267
Originated [Member] | Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	123,361	98,205
Originated [Member] | Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,423	167
Originated [Member] | Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,652	4,895
Originated [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	29,423	32,356
Originated [Member] | Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	28,996	32,167
Originated [Member] | Home Equity Lines Of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	67	144
Originated [Member] | Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	360	45
Originated [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	349	733
Originated [Member] | Consumer and Overdrafts [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	349	733
Acquired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	101,807	135,590
Acquired [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	94,210	129,200
Acquired [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,816	1,102
Acquired [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,781	5,288
Acquired [Member] | Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	47,111	54,988
Acquired [Member] | Residential [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,959	51,858
Acquired [Member] | Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	211	249
Acquired [Member] | Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,941	2,881
Acquired [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	50,721	74,683
Acquired [Member] | Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	45,726	71,832
Acquired [Member] | Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,537	842
Acquired [Member] | Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,458	2,009
Acquired [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	178	868
Acquired [Member] | Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	178	857
Acquired [Member] | Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans		11
Acquired [Member] | Home Equity Lines Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,781	5,039
Acquired [Member] | Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,331	4,641
Acquired [Member] | Home Equity Lines Of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	68
Acquired [Member] | Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	382	398
Acquired [Member] | Consumer and Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	16	12
Acquired [Member] | Consumer and Overdrafts [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 16	$ 12

Loans Receivable - Schedule of

Loans Receivable - Schedule of Carrying Amount of Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	$ 1,093,121	$ 902,336
Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	2,232	2,877
Acquired with Deteriorated Credit Quality [Member] | Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	1,186	1,232
Acquired with Deteriorated Credit Quality [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans	890	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	$ 156	$ 168

Loans Receivable - Schedule o_2

Loans Receivable - Schedule of Carrying Amount of Purchased Credit Impaired Loans (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans, allowance	$ 83	$ 73

Loans Receivable - Summary of_5

Loans Receivable - Summary of Accretable Yield, or Income Expected to be Collected for Acquired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]
Beginning balance	$ 245	$ 403
Accretion income	(53)	(70)
Reclassification from non-accretable difference		5
Disposals		(93)
Ending balance	$ 192	$ 245

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 22,573	$ 21,878
Less: accumulated depreciation and amortization	(10,771)	(10,280)
Total Bank premises and equipment, net	11,802	11,598
Land [Member]
Property Plant And Equipment [Line Items]
Premises and equipment, gross	1,997	1,997
Building and Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Premises and equipment, gross	13,753	13,430
Furniture, fixtures and equipment [Member]
Property Plant And Equipment [Line Items]
Premises and equipment, gross	6,808	6,096
Construction and improvements in process [Member]
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 15	$ 355

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Property Plant And Equipment [Abstract]
Depreciation expense	$ 1.1	$ 1.3

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Schedule of Change in Goodwill (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning Balance	$ 6,106,000	$ 6,106,000
Impairment	0	0
Ending Balance	$ 6,106,000	$ 6,106,000

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of goodwill	$ 0	$ 0
Amortization of intangible assets	$ 110,000	$ 126,000

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Schedule of Acquired Intangible Assets (Detail) - Core Deposit Intangible [Member] - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Line Items]
Amortized intangible assets, Gross Carrying Amount	$ 887	$ 887
Amortized intangible assets, Accumulated Amortization	$ (564)	$ (454)

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2020	$ 94
2021	78
2022	62
2023	46
2024 and after	$ 43

Deposits - Summary of Deposit B

Deposits - Summary of Deposit Balances (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Deposits [Abstract]
Demand	$ 141,379	$ 131,883
NOW Accounts	123,069	117,875
Money market accounts	148,134	49,885
Savings	357,844	465,441
Time deposits	455,395	392,373
Total deposits	$ 1,225,821	$ 1,157,457

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2019
Deposits [Line Items]
Time deposits, meet or exceed FDIC insurance limit of $250,000	$ 116	$ 149
Brokered time deposits	$ 60	77.5
Minimum [Member]
Deposits [Line Items]
Brokered time deposits remaining maturities period	9 months
Maximum [Member]
Deposits [Line Items]
Brokered time deposits remaining maturities period	36 months
PCSB Bank [Member]
Deposits [Line Items]
Deposits of local governments	$ 39.1	$ 40.1

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities of Time Deposits (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Deposits [Abstract]
Within 1 year	$ 221,832	$ 183,276
1 year to 2 years	112,394	49,350
2 years to 3 years	41,211	56,746
3 years to 4 years	33,538	56,458
4 years to 5 years	46,420	46,339
Thereafter		204
Total	$ 455,395	$ 392,373

FHLB and Other Borrowings - Add

FHLB and Other Borrowings - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Federal Home Loan Bank Advances [Line Items]
Advances from Federal Home Loan Bank	$ 111,216,000	$ 18,841,000
Percentage of outstanding advances to be maintained as collateral	110.00%
Secured borrowings	$ 118,000,000
FRB borrowings outstanding	0	0
Federal Home Loan Bank of New York [Member]
Federal Home Loan Bank Advances [Line Items]
Advances from Federal Home Loan Bank	111,216,000	18,841,000
Advances from federal home loan banks accessible	291,200,000	$ 314,900,000
Federal Home Loan Bank of New York [Member] | Original Maturities Ranging From 3 To 54 Months [Member]
Federal Home Loan Bank Advances [Line Items]
Advances from Federal Home Loan Bank	107,500,000
Federal Home Loan Bank of New York [Member] | FHLB Advances [Member]
Federal Home Loan Bank Advances [Line Items]
Balloon payment in 2026	2,800,000
Federal Home Loan Bank of New York [Member] | Amortizing Term Loan [Member]
Federal Home Loan Bank Advances [Line Items]
Advances from Federal Home Loan Bank	$ 3,700,000
Federal Home Loan Bank of New York [Member] | Minimum [Member] | FHLB Advances [Member]
Federal Home Loan Bank Advances [Line Items]
FHLB short term advances, original maturities	3 months
Federal Home Loan Bank of New York [Member] | Maximum [Member] | FHLB Advances [Member]
Federal Home Loan Bank Advances [Line Items]
FHLB short term advances, original maturities	54 months

FHLB and Other Borrowings - Mat

FHLB and Other Borrowings - Maturity Schedule of Advances (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Federal Home Loan Bank Advances [Line Items]
Amount Due, Total	$ 111,216	$ 18,841
Federal Home Loan Bank of New York [Member]
Federal Home Loan Bank Advances [Line Items]
Amount Due, Within 1 year	65,128	10,125
Amount Due, 1 year to 2 years	30,131	5,128
Amount Due, 2 years to 3 years	7,635	131
Amount Due, 3 years to 4 years	138	135
Amount Due, 4 years to 5 years	5,142	138
Amount Due, Thereafter	3,042	3,184
Amount Due, Total	$ 111,216	$ 18,841
Weighted Avg Rate, Within 1 year	2.29%	1.70%
Weighted Avg Rate, 1 year to 2 years	2.10%	1.81%
Weighted Avg Rate, 2 years to 3 years	3.22%	2.62%
Weighted Avg Rate, 3 years to 4 years	2.62%	2.62%
Weighted Avg Rate, 4 years to 5 years	3.31%	2.62%
Weighted Avg Rate, Thereafter	2.62%	2.62%
Weighted Avg Rate, Total	2.36%	1.91%

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Contract Amounts of Credit-related Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Standby Letter of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Credit related financial instruments	$ 1,688	$ 1,420
Commitments to Originate Loans [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Credit related financial instruments	136,770	102,644
Unused Lines of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Credit related financial instruments	$ 52,644	$ 56,553

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Rent expense under operating leases	$ 2.1	$ 1.9

Commitments and Contingencies_3

Commitments and Contingencies - Summary of Rent Commitments Before Considering Renewal Options (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Commitments And Contingencies Disclosure [Abstract]
Within 1 year	$ 1,733
1 year to 2 years	1,794
2 year to 3 years	1,770
3 year to 4 years	1,683
4 year to 5 years	1,313
Thereafter	5,647
Total	$ 13,940

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		$ 287,559	$ 279,846
Total other comprehensive income (loss)		1,860	(618)
Ending Balance		281,307	287,559
Net Unrealized Gain (Loss) on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]	(1,536)	37
Other comprehensive income (loss) before reclassifications	[1]	1,741	(1,835)
Amounts reclassified from accumulated other comprehensive (loss) income	[1]	(62)	(164)
Tax effect	[1]	(352)	558
Total other comprehensive income (loss)	[1]	1,327	(1,441)
Reclassification of certain tax effects on other comprehensive (loss)	[1],[2]		(132)
Ending Balance	[1]	(209)	(1,536)
Unrealized Losses on Retirement Plans [Member] | Pension Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[3]	(5,150)	(5,002)
Other comprehensive income (loss) before reclassifications	[3]	(486)	335
Amounts reclassified from accumulated other comprehensive (loss) income	[3]	1,144	725
Tax effect	[3]	(139)	(270)
Total other comprehensive income (loss)	[3]	519	790
Reclassification of certain tax effects on other comprehensive (loss)	[2],[3]		(938)
Ending Balance	[3]	(4,631)	(5,150)
Unrealized Losses on Retirement Plans [Member] | SERP Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[3]	(264)	(250)
Other comprehensive income (loss) before reclassifications	[3]	(19)	10
Amounts reclassified from accumulated other comprehensive (loss) income	[3]	36	34
Tax effect	[3]	(3)	(11)
Total other comprehensive income (loss)	[3]	14	33
Reclassification of certain tax effects on other comprehensive (loss)	[2],[3]		(47)
Ending Balance	[3]	(250)	(264)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(6,950)	(5,215)
Other comprehensive income (loss) before reclassifications		1,236	(1,490)
Amounts reclassified from accumulated other comprehensive (loss) income		1,118	595
Tax effect		(494)	277
Total other comprehensive income (loss)		1,860	(618)
Reclassification of certain tax effects on other comprehensive (loss)	[2],[4]		(1,117)
Ending Balance		$ (5,090)	$ (6,950)
[1]	Amounts reclassified from accumulated other comprehensive income are recorded in the Statement of Operations as part of "gains on sales of securities"
[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.
[3]	Amounts reclassified from accumulated other comprehensive income are recorded in the Statement of Operations as part of "other operating expenses"
[4]	The adoption of ASU 2018-02 requires the reclassification from accumulated other comprehensive income to retained earnings of certain stranded income tax effects in accumulated other comprehensive income resulting from the Tax Cuts and Jobs Act of 2017. Refer to Footnote 13 - Income Taxes for additional information.

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Corporate income tax rate	21.00%	34.00%	21.00%	28.06%

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income applicable to common stock	$ 8,318	$ 6,604
Average number of common shares outstanding	17,752,473	18,165,110
Less: Average unallocated ESOP shares	(1,259,713)	(1,362,216)
Average number of common shares outstanding used to calculate basic earnings per common share	16,492,760	16,802,894
Effect of equity-based awards	34,357
Average number of common shares outstanding used to calculate diluted earnings per common share	16,527,117	16,802,894
Earnings per Common share:
Basic	$ 0.50	$ 0.39
Diluted	$ 0.50	$ 0.39

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Number of dilutive potential common stock equivalents		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

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of loans	$ 1,093,121,000	$ 902,336,000
Remaining valuation allowance	5,664,000	4,904,000	$ 5,150,000
Net charge-offs	163,000	1,270,000
Provision for loan losses	808,000	414,000
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of loans	937,000	3,900,000
Remaining valuation allowance	173,000	451,000
Net charge-offs	0	1,100,000
Provision for loan losses	$ 40,000	$ 435,000
Minimum [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.10
Maximum [Member] | Measurement Input, Discount Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.20

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Jun. 30, 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	$ 73,567	$ 105,472
Total liabilities at fair value	1,339
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	36,911	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	8,360	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	26,957	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	1,417	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	616	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	141	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	7	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	1,339
Total liabilities at fair value	1,339
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	73,567	105,472
Total liabilities at fair value	1,339
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	36,911	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	8,360	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	26,957	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	1,339
Total liabilities at fair value	1,339
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	1,417	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	616	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	141	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	7	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	Jun. 30, 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	$ 1,417	$ 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	1,417	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	616	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	616	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	616
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] | Home Equity Lines Of Credit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	7	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	7	$ 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	$ 7
Range or Rate Used	0.062	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] | Commercial Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 141	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	141	845
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	$ 141	$ 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 [Member]
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] | 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] | 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		(0.051)
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		(0.051)
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	0.060	0.053
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		0.209
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		0.209
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	0.070	0.075
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	Jun. 30, 2019	Jun. 30, 2018
Financial assets:
Investment securities held to maturity	$ 346,243	$ 343,188
Investment securities available for sale	72,228	105,472
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	60,029	62,145
Investment securities held to maturity	345,545	353,183
Investment securities available for sale	72,228	105,504
Loans receivable, net	1,093,121	902,336
Accrued interest receivable	4,797	4,358
FHLB stock	6,255	2,050
Financial liabilities:
Accrued interest payable	209	154
Mortgage escrow funds	9,355	8,803
FHLB advances	111,216	18,841
Carrying Amount [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	1,339
Financial liabilities:
Derivative liabilities - interest rate contracts	1,339
Carrying Amount [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	770,426	765,084
Carrying Amount [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	455,395	392,373
Total [Member]
Financial assets:
Cash and cash equivalents	60,029	62,145
Investment securities held to maturity	346,243	343,188
Investment securities available for sale	72,228	105,504
Loans receivable, net	1,092,878	882,319
Accrued interest receivable	4,797	4,358
Financial liabilities:
Accrued interest payable	209	154
Mortgage escrow funds	9,355	8,803
FHLB advances	111,818	20,574
Total [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	1,339
Financial liabilities:
Derivative liabilities - interest rate contracts	1,339
Total [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	770,426	765,084
Total [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	460,554	394,205
Level 1 [Member]
Financial assets:
Cash and cash equivalents	60,029	62,145
Financial liabilities:
Accrued interest payable	16	7
Mortgage escrow funds	9,355	8,803
Level 1 [Member] | Demand, NOW, Money Market Deposits and Savings Accounts [Member]
Financial liabilities:
Time deposits	770,426	765,084
Level 2 [Member]
Financial assets:
Investment securities held to maturity	346,243	343,188
Investment securities available for sale	72,228	105,504
Accrued interest receivable	1,330	1,402
Financial liabilities:
Accrued interest payable	193	147
FHLB advances	111,818	20,574
Level 2 [Member] | Derivatives – Interest Rate Contracts [Member]
Financial assets:
Derivative assets - interest rate contracts	1,339
Financial liabilities:
Derivative liabilities - interest rate contracts	1,339
Level 2 [Member] | Time Deposits [Member]
Financial liabilities:
Time deposits	460,554	394,205
Level 3 [Member]
Financial assets:
Loans receivable, net	1,092,878	882,319
Accrued interest receivable	$ 3,467	$ 2,956

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Current tax expense (benefit)
Federal	$ 2,624	$ 2,577
State	412	20
Total current tax expense (benefit)	3,036	2,597
Deferred tax expense (benefit)
Federal	(329)	2,414
State	(91)	313
Total deferred tax expense	(420)	2,727
State tax valuation allowances, net of federal benefit	70	(302)
Total	$ 2,686	$ 5,022

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Income Taxes [Line Items]
Corporate income tax rate	21.00%	34.00%	21.00%	28.06%
Re-measurement charge (benefit) through income tax expense				$ 1,600,000
Effective date for change in corporate income tax rate				Jan. 1, 2018
Charitable contribution carryforwards			$ 2,700,000
Charitable contribution carryforwards expiration year			2022
Reclassification from deferred income tax to retained earnings			$ 2,800,000
Deferred tax liabilities not been recognized of retained earnings			588,000
Unrecognized tax benefits recorded			$ 0	$ 0
Unrecognized tax benefits to significantly increase or decrease in the next twelve months			0
New York State [Member]
Income Taxes [Line Items]
Operating loss carryforwards, net			$ 1,700,000
Operating loss carryforwards expiration year			2034
Maximum [Member]
Income Taxes [Line Items]
Charitable contribution carryforwards expiration period			5 years

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	34.00%	21.00%	28.06%
Tax at federal statutory rate			$ 2,311	$ 3,262
State Taxes, net of federal benefit			310	24
Tax-exempt income			(66)	(61)
BOLI income			(114)	(157)
ESOP Compensation			199	300
Deferred tax re-remeasurement charge				1,570
Other, net			46	84
Total			$ 2,686	$ 5,022
Effective tax rate			24.41%	43.20%

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Deferred Tax Assets:
Allowance for Loan Losses	$ 1,419	$ 1,222
Other comprehensive loss (defined benefit plans)	1,298	1,439
Deferred compensation	879	836
Charitable contribution carryforward	671	949
Stock based compensation	498
Depreciation of premises and equipment	416	413
Other comprehensive loss (securities)	55	408
Other	544	611
Total deferred tax assets	5,780	5,878
Deferred Tax Liabilities:
Prepaid pension costs	2,416	2,424
Deferred loan costs and fees, net	466	451
Other		31
Total deferred tax liabilities	2,882	2,906
Deferred tax asset valuation allowance	(420)	(350)
Net deferred tax asset	$ 2,478	$ 2,622

Post-Retirement Benefits - Addi

Post-Retirement Benefits - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Effective date of freezing of the defined benefit pension plan		May 1, 2017
Defined benefit plan, contributions by employer		$ 0
Percentage of investment in plan assets		100.00%	100.00%
Estimated long-term inflation rate		2.50%
Expected return on plan assets		7.50%
ESOP shares		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
Number of shares committed to be released per year through 2032		96,881
ESOP Compensation		$ 1,918,000	$ 2,248,000
Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of investment in plan assets		60.00%	67.00%
Equity Mutual Funds [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		6.00%
Equity Mutual Funds [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		8.00%
Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of investment in plan assets		3.00%	1.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of investment in plan assets		37.00%	32.00%
Fixed Income Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		3.00%
Fixed Income Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		5.00%
Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, contributions by employer	$ 0
Employee Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pre-tax amounts recognized in accumulated other comprehensive loss		$ 5,900,000	$ 6,500,000
Assumed discount rates used		3.31%	4.14%
Temporary increase in percentage of bond fund portion		50.00%
Expected return on plan assets		7.50%	7.50%
Benefits Paid		$ 929,000	$ 868,000
Employee Pension Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset rebalancing threshold		10.00%
Employee Pension Plan [Member] | Equity Mutual Funds [Member] | Long-Term Objective [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of investment in plan assets		65.00%
Employee Pension Plan [Member] | Debt Securities [Member] | Long-Term Objective [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of investment in plan assets		34.00%
Employee Pension Plan [Member] | Cash Equivalents [Member] | Long-Term Objective [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of investment in plan assets		1.00%
Employee Pension Plan [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss	528,000
Prior service (credit) cost	0
Defined Contribution Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, description		The Company maintains a defined contribution plan for eligible employees hired after October 1, 2012.
Defined contribution plan for eligible employee who hired after		Oct. 1, 2012
Plan expense		$ 0	0
401 (k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, minimum age for eligibility to receive contribution		21 years
Defined contribution plan, minimum period of service to receive contribution		1 year
Employee contribution minimum percentage rate		1.00%
Rate of contribution receive by employee on salary		25.00%
Employer matching contribution, percent of match		75.00%
Employer matching contribution, percent of employee gross pay		6.00%
Defined contribution savings plan expense		$ 0	414,000
Defined benefit plan effective date of suspension		Jul. 1, 2018
Supplemental Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss		$ 318,000	335,000
Accrued benefit cost		3,700,000	3,400,000
Projected benefit obligation and accumulated benefit obligation		3,700,000	3,400,000
Pension expense		613,000	655,000
Benefits Paid		$ 272,000	$ 272,000
Supplemental Retirement Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rates used		3.31%
Rates of compensation increases used		3.31%
Supplemental Retirement Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rates used		4.24%
Rates of compensation increases used		4.24%
Supplemental Retirement Plan [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated amortization of net loss	$ 45,000

Post-Retirement Benefits - Summ

Post-Retirement Benefits - Summary of Plan's Funded Status (Detail) - Employee Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Change in benefit obligation:
Beginning benefit obligation	$ 24,764	$ 25,614
Interest Cost	1,000	968
Actuarial Loss	(327)	8
Benefits Paid	(929)	(868)
Settlements	(2,152)	(958)
Ending benefit obligation	22,356	24,764
Change in plan assets, at fair value:
Beginning plan assets	27,975	27,444
Actual return	1,239	2,357
Benefits paid	(929)	(868)
Settlements	(2,152)	(958)
Ending Plan assets	26,133	27,975
Funded Status	3,777	3,211
Accumulated Benefit Obligation	$ 22,356	$ 24,764

Post-Retirement Benefits - Su_2

Post-Retirement Benefits - Summary of Net Period Pension Cost (Benefit), Contributions and Benefits Paid (Detail) - Employee Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Net period pension cost (benefit)	$ 92	$ (321)
Benefits paid	$ 929	$ 868

Post-Retirement Benefits - Sche

Post-Retirement Benefits - Schedule of Net Periodic Pension Cost and Other Amounts Recognized in Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Employee Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1,000	$ 968
Expected return on plan assets	(2,052)	(2,014)
Amortization of prior net loss	1,144	725
Net periodic cost (benefit)	92	(321)
Interest cost	1,000	968
Supplemental Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior net loss	36	34
Service cost	455	518
Interest cost	122	103
Net periodic cost	$ 613	$ 655

Post-Retirement Benefits - Sc_2

Post-Retirement Benefits - Schedule of Benefit Payments which Reflects Expected Future Service (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Employee Pension Plan [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
2020	$ 1,217
2021	1,239
2022	1,275
2023	1,312
2024	1,315
Following five years	6,027
Supplemental Retirement Plan [Member]
Defined Benefit Plan Estimated Future Benefit Payments [Line Items]
2020	272
2021	272
2022	3,180
2023	272
2024	$ 136

Post-Retirement Benefits - Sc_3

Post-Retirement Benefits - Schedule of Weighted-Average Assumptions Used to Determine Net Periodic Pension Cost (Detail)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	7.50%
Employee Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	3.31%	3.87%
Expected return on plan assets	7.50%	7.50%

Post-Retirement Benefits - Sc_4

Post-Retirement Benefits - Schedule of Actual Pension Plan Asset Allocation and Target Allocation by Asset Category (Detail)	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Percentage of Plan Assets	100.00%	100.00%
Equity Mutual Funds And Common/Collective Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	65.00%
Percentage of Plan Assets	60.00%	67.00%
Fixed Income Common/Collective Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	34.00%
Percentage of Plan Assets	37.00%	32.00%
Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	1.00%
Percentage of Plan Assets	3.00%	1.00%

Post-Retirement Benefits - Sc_5

Post-Retirement Benefits - Schedule of Fair Value of Plan Assets (Detail) - Employee Pension Plan [Member] - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 26,133	$ 27,975	$ 27,444
Carrying Amount [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	26,133	27,975
Estimate of Fair Value Measurement [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	678	168
Estimate of Fair Value Measurement [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,455	27,807
Equity Mutual Funds And Common/Collective Trusts [Member] | Carrying Amount [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,837	18,914
Equity Mutual Funds And Common/Collective Trusts [Member] | Estimate of Fair Value Measurement [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,837	18,914
Fixed Income Common/Collective Trusts [Member] | Carrying Amount [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,618	8,893
Fixed Income Common/Collective Trusts [Member] | Estimate of Fair Value Measurement [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,618	8,893
Cash Equivalents [Member] | Carrying Amount [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	678	168
Cash Equivalents [Member] | Estimate of Fair Value Measurement [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 678	$ 168

Post-Retirement Benefits - Shar

Post-Retirement Benefits - Shares Held by ESOP (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Allocated to participants	241,804	144,923
Unearned	1,211,405	1,308,286
Total ESOP shares	1,453,209	1,453,209
Fair value of unearned shares	$ 24,531	$ 25,996

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 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 Matters - Summary of

Regulatory Matters - Summary of Bank's Actual Capital Amounts and Ratios Compared to Required Ratios for Minimum Capital Adequacy and for Classification as Well Capitalized (Detail) - PCSB Bank [Member] - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Leverage (Tier 1), Bank Actual Amount	$ 209,885	$ 200,488
Common Tier 1, Bank Actual Amount	209,885	200,488
Tier 1, Bank Actual Amount	209,885	200,488
Total, Bank Actual Amount	$ 215,549	$ 205,392
Leverage (Tier 1), Bank Actual Ratio	13.80%	13.60%
Common Tier 1, Bank Actual Ratio	18.00%	21.10%
Tier 1, Bank Actual Ratio	18.00%	21.10%
Total, Bank Actual Ratio	18.40%	21.60%
Leverage (Tier 1), For Capital Adequacy Purposes Amount	$ 60,774	$ 58,924
Common Tier 1, For Capital Adequacy Purposes Amount	52,579	42,745
Tier 1, For Capital Adequacy Purposes Amount	70,105	56,994
Total, For Capital Adequacy Purposes Amount	$ 93,474	$ 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 Captial Adequacy Purposes Ratio	8.00%	8.00%
Leverage (Tier 1), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 75,968	$ 73,655
Common Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	75,948	61,743
Tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	93,474	75,991
Total, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 116,842	$ 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%

Related Party Disclosures - Add

Related Party Disclosures - Additional Information (Detail) - USD ($)	Jun. 30, 2019	Jun. 30, 2018
PCSB Bank [Member]
Related Party Transaction [Line Items]
Insider loans	$ 0	$ 0

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)	12 Months Ended
	Jun. 30, 2019USD ($)
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Notional amounts	$ 68,535,000
Weighted average pay rates	3.89%
Weighted average receive rates	3.89%
Weighted average maturity	9 years 10 months 2 days

Revenue From Contracts With C_2

Revenue From Contracts With Customers - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Fees and service charges	$ 1,763,000	$ 1,529,000
Revenue from contracts with customers	1,600,000	1,300,000
Fees and Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	1,200,000	882,000
Interchange Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	432,000	390,000
Gain/Losses on Sales of Foreclosed Real Estate [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	$ 24,000	$ (7,000)

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Oct. 24, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 2,140,000
Number of other than stock options granted	547,185
Number of shares granted	1,339,293
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 5,400,000
Expected weighted-average period for cost recognition	4 years 4 months 24 days
Restricted Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 9,100,000
Expected weighted-average period for cost recognition	4 years 4 months 24 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	$ 2,100,000	$ 0
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
Contractual term	10 years
Number of shares granted	1,339,293
2018 Equity Incentive Plan [Member] | Stock Options [Member] | Annual Vesting on Each Anniversary [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting percentage for year	20.00%
2018 Equity Incentive Plan [Member] | Stock Options [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years
2018 Equity Incentive Plan [Member] | Stock Options [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
2018 Equity Incentive Plan [Member] | Restricted Stock and Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for issuance			726,604
2018 Equity Incentive Plan [Member] | Restricted Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of other than stock options granted	547,185
Number of shares available for grant	726,604
2018 Equity Incentive Plan [Member] | Restricted Stock Awards [Member] | Annual Vesting on Each Anniversary [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting percentage for year	20.00%
2018 Equity Incentive Plan [Member] | Restricted Stock Awards [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of RSA activity (Detail)	12 Months Ended
	Jun. 30, 2019$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, granted | shares	547,185
Number of Shares, Unvested allocated shares outstanding ending balance | shares	547,185
Weighted-Average Grant Date Fair Value, Shares granted | $ / shares	$ 19.02
Weighted-Average Grant Date Fair Value, Unvested allocated shares outstanding ending balance | $ / shares	$ 19.02

Stock-Based Compensation - Fair

Stock-Based Compensation - Fair Value of Option Granted Using Weighted-Average Assumptions (Detail)	12 Months Ended
	Jun. 30, 2019$ / shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	3.03%
Expected term (in years)	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	12 Months Ended
	Jun. 30, 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
Weighted-Average Exercise Price, Option granted | $ / shares	$ 19.04
Weighted-Average Exercise Price, Option outstanding ending balance | $ / shares	$ 19.04
Weighted-Average Remaining Contractual Years, Option outstanding	9 years 4 months 24 days
Aggregate Intrinsic Value, Option outstanding | $	$ 1,625

Parent Company Only Financial_3

Parent Company Only Financial Statements - Parent Company Only Financial Statements (Consolidated Balance Sheets) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Assets
Cash and cash equivalents	$ 60,029	$ 62,145	$ 60,486
Other assets	9,446	5,677
Total assets	1,637,579	1,480,187
Liabilities and shareholders' equity
Other liabilities	9,880	7,527
Shareholders' equity	281,307	287,559	279,846
Total liabilities and shareholders' equity	1,637,579	1,480,187
Parent Company [Member]
Assets
Cash and cash equivalents	55,626	72,140	$ 71,273
Investment in Bank	211,205	200,058
ESOP loan receivable	12,594	13,563
Other assets	1,936	1,798
Total assets	281,361	287,559
Liabilities and shareholders' equity
Other liabilities	54
Shareholders' equity	281,307	287,559
Total liabilities and shareholders' equity	$ 281,361	$ 287,559

Parent Company Only Financial_4

Parent Company Only Financial Statements - Parent Company Only Financial Statements (Consolidated Statements of Operations) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Condensed Income Statements Captions [Line Items]
Interest income	$ 42,704	$ 41,637
Other non-interest expenses	2,138	1,763
Net income before income tax expense	11,004	11,626
Income tax expense	2,686	5,022
Net income	8,318	6,604
Parent Company [Member]
Condensed Income Statements Captions [Line Items]
Interest income	715	668
Equity in income of Bank	8,318	7,188
Other non-interest expenses	715	689
Net income before income tax expense	8,318	7,167
Income tax expense		563
Net income	$ 8,318	$ 6,604

Parent Company Only Financial_5

Parent Company Only Financial Statements - Parent Company Only Financial Statements (Consolidated Statements of Cash Flows) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net income	$ 8,318	$ 6,604
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred tax expense	(350)	2,425
Net increase in accrued interest receivable	(439)	(665)
Other adjustments, principally net changes in other assets and liabilities	(741)	1,834
Net cash provided by operating activities	12,987	14,611
Cash Flows from Investing Activities:
Net cash used in investing activities	(155,906)	(58,412)
Cash Flows from Financing Activities:
Common stock dividends paid	(2,183)	(504)
Issuance of common stock		(17)
Repurchase of common stock	(18,305)
Net cash provided by financing activities	140,803	45,460
Net (decrease) increase in cash and cash equivalents	(2,116)	1,659
Cash and cash equivalents at beginning of period	62,145	60,486
Cash and cash equivalents at end of period	60,029	62,145
Parent Company [Member]
Cash Flows from Operating Activities:
Net income	8,318	6,604
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in income of Bank	(8,318)	(7,188)
Deferred tax expense	213	733
Net increase in accrued interest receivable	(89)	(230)
Other adjustments, principally net changes in other assets and liabilities	1,932	(569)
Net cash provided by operating activities	2,056	(650)
Cash Flows from Investing Activities:
Decrease in ESOP loan	969	969
Net cash used in investing activities	969	969
Cash Flows from Financing Activities:
Common stock dividends paid	(2,183)	(504)
Allocation of ESOP shares	949	1,069
Issuance of common stock		(17)
Repurchase of common stock	(18,305)
Net cash provided by financing activities	(19,539)	548
Net (decrease) increase in cash and cash equivalents	(16,514)	867
Cash and cash equivalents at beginning of period	72,140	71,273
Cash and cash equivalents at end of period	$ 55,626	$ 72,140

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Common Stock [Member] - $ / shares	2 Months Ended	12 Months Ended
	Sep. 06, 2019	Jun. 30, 2019
Subsequent Event [Line Items]
Number of shares repurchased		908,256
Subsequent Event [Member]
Subsequent Event [Line Items]
Number of shares repurchased	148,500
Average cost per share	$ 19.54