Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Schedule of Goodwill and Intangible Assets

The table below provides detail regarding the Company's intangible assets.

	Goodwill		Core Deposit and Other Intangibles		Total
	(In thousands)
Balance at September 30, 2021	$	303,457	$	6,562	$	310,019
Additions	—		—		—
Amortization	—		(1,010)		(1,010)
Balance at September 30, 2022	303,457		5,552		309,009
Additions	1,293		1,297		2,590
Amortization	—		(980)		(980)
Balance at September 30, 2023	$	304,750	$	5,869	$	310,619

Schedule of Future Amortization Expense

The table below presents the estimated future amortization expense of other intangibles for the next five years.

Fiscal Year	Expense
	(In thousands)
2024	$	1,030
2025	981
2026	938
2027	763
2028	567