BUSINESS ACQUISITIONS - Schedule of Measurement Period Adjustments (Details) - Computershare Mortgage Services Inc - USD ($) $ in Thousands			3 Months Ended
	Dec. 31, 2024	May 01, 2024	Dec. 31, 2024
Business Acquisition [Line Items]
Total consideration	$ 731,025	$ 708,026
Subsequent Adjustments to Fair Value, Total consideration			$ 22,999
Residential mortgage loans, held-for-sale	2,402	2,402	2,402
Subsequent Adjustments to Fair Value, Residential mortgage loans, held-for-sale			0
Servicer advances receivable	275,513	275,782	275,513
Subsequent Adjustments to Fair Value, Servicer advances receivable			(269)
Mortgage servicing rights, at fair value	700,207	696,462	700,207
Subsequent Adjustments to Fair Value, Mortgage servicing rights, at fair value			3,745
Cash and cash equivalents	101,993	102,011	101,993
Subsequent Adjustments to Fair Value, Cash and cash equivalents			(18)
Restricted cash	2,271	2,237	2,271
Subsequent Adjustments to Fair Value, Restricted cash			34
Other assets	92,594	84,028	92,594
Subsequent Adjustments to Fair Value, Other assets			8,566
Total Assets Acquired	1,174,980	1,162,922	1,174,980
Subsequent Adjustments to Fair Value, Total Assets Acquired			12,058
Accrued expenses and other liabilities	225,944	236,141	225,944
Subsequent Adjustments to Fair Value, Accrued expenses and other liabilities			(10,197)
Secured notes and bonds payable	190,596	190,596	190,596
Subsequent Adjustments to Fair Value, Secured notes and bonds payable			0
Total Liabilities Assumed	416,540	426,737	416,540
Subsequent Adjustments to Fair Value, Total Liabilities Assumed			(10,197)
Net Assets	758,440	736,185	758,440
Subsequent Adjustments to Fair Value, Net Assets			22,255
Bargain purchase gain		28,159
Subsequent Adjustments to Fair Value, Bargain Purchase Gain			$ (744)
Bargain Purchase Gain	$ 27,415	$ 27,400