Business Combination - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Mar. 01, 2024	Dec. 31, 2023	Sep. 30, 2023
Fair value of liabilities assumed
Goodwill	$ 412,213	$ 411,401		$ 305,125	$ 304,750
Luther Burbank
Business Acquisition [Line Items]
Total merger consideration			$ 465,504
Fair value of assets acquired
Cash and cash equivalents			627,403
Investment securities			518,878
Loans receivable			3,116,899
Loans held for sale			3,089,442
Interest receivable			25,697
Premises and equipment			6,436
FHLB stock			35,831
Bank owned life insurance			17,781
Intangible assets			37,022
Deferred tax asset, net			125,452
Other assets			75,645
Total assets acquired			7,676,486
Fair value of liabilities assumed
Customer accounts			5,640,440
Accrued expenses and other liabilities			100,275
Total liabilities assumed			7,316,542
Net Assets Acquired			359,944
Goodwill			105,560
Luther Burbank | Borrowings
Fair value of liabilities assumed
Debt			1,432,138
Luther Burbank | Junior subordinated deferrable interest debentures
Fair value of liabilities assumed
Debt			50,175
Luther Burbank | Senior Debt
Fair value of liabilities assumed
Debt			$ 93,514