Fair Value Of Financial Instruments (Tables)

12 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Schedule Of Fair Value Assets Measured On A Recurring Basis

The following tables provide the level of valuation assumption used to determine the carrying value of the Company's financial instruments measured at fair value on a recurring basis at the dates presented. The Company did not have any Level 3 financial instruments measured at fair value on a recurring basis at September 30, 2020 or 2019.

	September 30, 2020
			Quoted Prices		Significant		Significant
			in Active Markets		Other Observable		Unobservable
	Carrying		for Identical Assets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
	(Dollars in thousands)
Assets:
AFS Securities:
MBS	$	1,180,803	$	—	$	1,180,803	$	—
GSE debentures	370,340		—		370,340		—
Municipal bonds	9,807		—		9,807		—
	$	1,560,950	$	—	$	1,560,950	$	—
Liabilities:
Interest rate swaps	$	53,149	$	—	$	53,149	$	—

	September 30, 2019
			Quoted Prices		Significant		Significant
			in Active Markets		Other Observable		Unobservable
	Carrying		for Identical Assets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
	(Dollars in thousands)
Assets:
AFS Securities:
MBS	$	936,487	$	—	$	936,487	$	—
GSE debentures	249,954		—		249,954		—
Municipal bonds	18,422		—		18,422		—
	$	1,204,863	$	—	$	1,204,863	$	—
Liabilities:
Interest rate swaps	$	33,090	$	—	$	33,090	$	—

Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments

The carrying amounts and estimated fair values of the Company's financial instruments by fair value hierarchy, at the dates presented, were as follows:

	2020
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	185,148	$	185,148	$	185,148	$	—	$	—
AFS securities	1,560,950		1,560,950		—		1,560,950		—
Loans receivable	7,202,851		7,663,000		—		—		7,663,000
FHLB stock	93,862		93,862		93,862		—		—
Liabilities:
Deposits	6,191,408		6,259,080		3,170,164		3,088,916		—
Borrowings	1,789,313		1,840,605		—		1,840,605		—
Interest rate swaps	53,149		53,149		—		53,149		—

	2019
	Carrying		Estimated Fair Value
	Amount		Total		Level 1		Level 2		Level 3
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	220,370	$	220,370	$	220,370	$	—	$	—
AFS securities	1,204,863		1,204,863		—		1,204,863		—
Loans receivable	7,416,747		7,654,586		—		—		7,654,586
FHLB stock	98,456		98,456		98,456		—		—
Liabilities:
Deposits	5,581,867		5,614,895		2,594,242		3,020,653		—
Borrowings	2,239,989		2,253,353		100,001		2,153,352		—
Interest rate swaps	33,090		33,090		—		33,090		—