Summary of Significant Accounting Policies (Tables)

9 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Schedule of Intangible Assets and Goodwill

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

	Goodwill		Core Deposit and Other Intangibles		Total
	(In thousands)
Balance at September 30, 2023	$	304,750	$	5,869	$	310,619
Additions	375		375		750
Amortization	—		(266)		(266)
Balance at December 31, 2023	305,125		5,978		311,103
Additions	106,276		37,462		143,738
Amortization	—		(1,302)		(1,302)
Balance at March 31, 2024	411,401		42,138		453,539
Additions	812		1,102		1,914
Amortization	—		(3,198)		(3,198)
Balance at June 30, 2024	$	412,213	$	40,042	$	452,255

Schedule of Future Amortization Expense

The table below presents the estimated future amortization expense of other intangibles for the next five years as of June 30, 2024.

Fiscal Year	Expected Expense
	(In thousands)
2024	$	5,904
2025	9,856
2026	7,306
2027	5,561
2028	5,200
Thereafter	6,215
Total Intangibles Assets	$	40,042