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Derivatives and Hedging Activities (Tables)
6 Months Ended
Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Fair Value, Notional Amount and Balance Sheet Classification
The following tables present the fair value, notional amount and balance sheet classification of derivative assets and liabilities at March 31, 2021 and September 30, 2020.

March 31, 2021Derivative AssetsDerivative Liabilities
Interest rate contract purposeBalance Sheet LocationNotionalFair ValueBalance Sheet LocationNotionalFair Value
(In thousands)(In thousands)
Client swap program hedgesOther assets$653,904 $5,104 Other liabilities$653,904 $5,104 
Commercial loan fair value hedgesOther assets— — Other liabilities90,918 4,610 
Mortgage loan fair value hedgesOther assets500,000 2,135 Other liabilities— — 
Borrowings cash flow hedgesOther assets1,200,000 59,198 Other liabilities— — 
$2,353,904 $66,437 $744,822 $9,714 


September 30, 2020Derivative AssetsDerivative Liabilities
Interest rate contract purposeBalance Sheet LocationNotionalFair ValueBalance Sheet LocationNotionalFair Value
(In thousands)(In thousands)
Client swap program hedgesOther assets$656,074 $48,201 Other liabilities$656,074 $48,201 
Commercial loan fair value hedgesOther assets— — Other liabilities93,316 8,492 
Mortgage loan fair value hedgesOther assets— — Other liabilities500,000 16,061 
Borrowings cash flow hedgesOther assets— — Other liabilities1,600,000 17,375 
$656,074 $48,201 $2,849,390 $90,129 
Schedule of Fair Value Hedge Accounting on Carrying Value of Hedged Items The following tables present the impact of fair value hedge accounting on the carrying value of the hedged items at March 31, 2021 and September 30, 2020.
(In thousands)March 31, 2021
Balance sheet line item in which hedged item is recordedCarrying value of hedged itemsCumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items
Loans receivable (1) (2)$1,934,688 $2,831 
$1,934,688 $2,831 

(1) Includes the amortized cost basis of the closed mortgage loan portfolios used to designate the hedging relationships in which the hedged items are the last layer expected to be remaining at the end of the hedging relationships. At March 31, 2021, the amortized cost basis of the closed loan portfolios used in the hedging relationships was $1,839,169,000, the cumulative basis adjustment associated with the hedging relationships was $(1,929,000), and the amount of the designated hedged items was $500,000,000.
(2) Includes the amortized cost basis of commercial loans designated in fair value hedging relationships. At March 31, 2021, the amortized cost basis of the hedged commercial loans was $95,519,000 and the cumulative basis adjustment associated with the hedging relationships was $4,760,000.

(In thousands)September 30, 2020
Balance sheet line item in which hedged item is recordedCarrying value of hedged itemsCumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items
Loans receivable (1) (2)$2,562,765 $24,664 
$2,562,765 $24,664 

(1) Includes the amortized cost basis of the closed mortgage loan portfolios used to designate the hedging relationships in which the hedged items are the last layer expected to be remaining at the end of the hedging relationships. At September 30, 2020, the amortized cost basis of the closed loan portfolios used in the hedging relationships was $2,461,008,000, the cumulative basis adjustment associated with the hedging relationships was $16,049,000, and the amount of the designated hedged items was $500,000,000.

(2) Includes the amortized cost basis of commercial loans designated in fair value hedging relationships. At September 30, 2020, the amortized cost basis of the hedged commercial loans was $101,757,000 and the cumulative basis adjustment associated with the hedging relationships was $8,615,000.
Schedule of Impact of Derivative Instruments
The following tables present the gain (loss) recognized in AOCI on derivative instruments related to cash flow hedges on borrowings for the periods presented, as well as the effect of reclassification adjustments.

(In thousands)Three Months Ended March 31,
Amounts recognized in AOCI20212020
Interest rate contracts:
Pay fixed/receive floating swaps on borrowings cash flow hedges$70,565 $(12,428)
Reclassification adjustment of net (gain)/loss included in net income(14,110)— 
Total pre-tax gain/(loss) recognized in AOCI $56,455 $(12,428)
(In thousands)Six Months Ended March 31,
Amounts recognized in AOCI20212020
Interest rate contracts:
Pay fixed/receive floating swaps on borrowings cash flow hedges$90,683 $(9,313)
Reclassification adjustment of net (gain)/loss included in net income(14,110)— 
Total pre-tax gain/(loss) recognized in AOCI $76,573 $(9,313)
The following tables present the impact of derivative instruments (client swap program) that are not designated in accounting hedges under ASC 815 for the periods presented.

(In thousands)Three Months Ended March 31,
Derivative instrumentsClassification of gain/(loss) recognized in income on derivative instrument20212020
Interest rate contracts:
Pay fixed/receive floating swapOther noninterest income$40,929 $(28,184)
Receive fixed/pay floating swapOther noninterest income(40,929)28,184 
$— $— 
(In thousands)Six Months Ended March 31,
Derivative instrumentsClassification of gain/(loss) recognized in income on derivative instrument20212020
Interest rate contracts:
Pay fixed/receive floating swapOther noninterest income$53,305 $(22,776)
Receive fixed/pay floating swapOther noninterest income(53,305)22,776 
$— $— 
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location
The following tables present the gain (loss) on derivative instruments in fair value and cash flow accounting hedging relationships under ASC 815 for the periods presented.

Three Months Ended March 31, 2021Three Months Ended March 31, 2020
Interest income on loans receivableInterest expense on FHLB advancesInterest income on loans receivableInterest expense on FHLB advances
(In thousands)(In thousands)
Interest income/(expense), including the effects of fair value and cash flow hedges$132,757 $(11,991)$138,549 $(13,368)
Gain/(loss) on fair value hedging relationships:
Interest rate contracts
Amounts related to interest settlements on derivatives$(1,563)$(112)
Recognized on derivatives17,491 (24,676)
Recognized on hedged items(17,377)24,666 
Net income/(expense) recognized on fair value hedges$(1,449)$(122)
Gain/(loss) on cash flow hedging relationships:
Interest rate contracts
Amounts related to interest settlements on derivatives$3,066 $498 
Amount of derivative gain/(loss) reclassified from AOCI into interest income/expense14,110 — 
Net income/(expense) recognized on cash flow hedges$17,176 $498 
Six months ended March 31, 2021Six months ended March 31, 2020
Interest income on loans receivableInterest expense on FHLB advancesInterest income on loans receivableInterest expense on FHLB advances
(In thousands)(In thousands)
Interest income/(expense), including the effects of fair value and cash flow hedges$266,428 $(25,189)$280,695 $(27,026)
Gain/(loss) on fair value hedging relationships:
Interest rate contracts
Amounts related to interest settlements on derivatives$(3,104)$(186)
Recognized on derivatives22,078 (19,984)
Recognized on hedged items(21,833)20,073 
Net income/(expense) recognized on fair value hedges$(2,859)$(97)
Gain/(loss) on cash flow hedging relationships:
Interest rate contracts
Amounts related to interest settlements on derivatives$6,664 $284 
Amount of derivative gain/(loss) reclassified from AOCI into interest income/expense14,110 — 
Net income/(expense) recognized on cash flow hedges$20,774 $284