CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities:
Net Income	$ 28,327	$ 22,022
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	2,883	2,263
Net accretion of premiums, discounts and loan fees and costs	(7,620)	(4,575)
Deferred income taxes and valuation allowance	2,262	2,940
Realized gain on bargain purchase	(3,053)
Amortization of intangible assets	534	615
Amortization of benefit plans’ unrecognized net gain	42	480
(Reversal of) provision for credit losses	2,694	(2,247)
Loss on write-down and sales of other real estate owned		28
Loans originated for sale	(212,037)	(120,091)
Proceeds from sale of mortgage loans held-for-sale	224,141	127,678
Gain on sale of mortgage loans held-for-sale, net	(3,916)	(1,273)
Realized (gain) loss on sale and call of investment securities available for sale	(436)	3
Debt extinguishment expenses	796
Realized gain on sale of loans receivable	(352)
Realized loss on disposition of premises and equipment	26	342
Increase in cash surrender value of bank owned life insurance	(3,192)	(3,156)
ESOP, stock option plan and restricted stock plan expenses	3,763	4,269
(Increase) decrease in interest receivable	(752)	1,099
Increase in other assets	(3,225)	(20,227)
Decrease in interest payable	(237)	(3,094)
Increase in other liabilities	172	17,663
Net Cash Provided by Operating Activities	30,820	24,739
Purchases of:
Investment securities available for sale	(604,971)	(216,015)
Proceeds from:
Repayments/calls/maturities of investment securities available for sale	253,802	70,213
Repayments/calls/maturities of investment securities held to maturity	2,930	2,745
Sales of investment securities available for sale	44,842	3,646
Purchase of loans	(23,508)	(34,249)
Net decrease in loans receivable	192,081	224,895
Proceeds from sale of loans receivable	43,931
Purchase of interest rate caps		(1,476)
Additions to premises and equipment	(2,224)	(2,688)
Proceeds from cash settlement of premises and equipment		395
Redemption of FHLB stock	16,421	1,352
Net cash acquired in acquisition	4,296
Net Cash (Used in) Provided by Investing Activities	(72,400)	48,818
Cash Flows from Financing Activities:
Net increase in deposits	423,187	41,832
Repayment of term FHLB advances	(1,667,796)	(1,680,059)
Proceeds from term FHLB advances	1,365,000	1,650,000
Net decrease in other short-term borrowings	(68,635)	(17,680)
Net decrease in advance payments by borrowers for taxes	(1,263)	(302)
Repurchase and cancellation of common stock of Kearny Financial Corp.	(45,704)	(52,254)
Cancellation of shares repurchased on vesting to pay taxes	(689)	(937)
Dividends paid	(13,793)	(11,296)
Net Cash Used in Financing Activities	(9,693)	(70,696)
Net (Decrease) Increase in Cash and Cash Equivalents	(51,273)	2,861
Cash and Cash Equivalents - Beginning	180,967	38,935
Cash and Cash Equivalents - Ending	129,694	41,796
Cash paid during the period for:
Income taxes, net of refunds	9,189	6,379
Interest	30,798	48,881
Non-cash investing and financing activities:
Transfers from loans receivable to loans receivable held-for-sale	43,579
Acquisition of other real estate owned in settlement of loans		206
Fair value of assets acquired, net of cash and cash equivalents acquired	567,816
Fair value of liabilities assumed	$ 523,926
ASU 2019-04 [Member]
Non-cash investing and financing activities:
Debt securities transferred from held to maturity to available for sale		537,732
ASU 2016-02 [Member]
Non-cash investing and financing activities:
Operating lease right-of-use assets		17,243
Operating lease liabilities		$ 17,758