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Business Combination - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Sep. 30, 2024	Mar. 01, 2024
Business Acquisition [Line Items]
Goodwill	$ 414,723		$ 411,360
Luther Burbank
Business Acquisition [Line Items]
Goodwill				$ 107,890
Intangible assets				$ 37,022
Merger related expenses	$ 239	$ 517

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