VARIABLE INTEREST ENTITIES - Schedule of Financial Condition of VIEs Reflected in Consolidated Statements of Financial Condition (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets
Mortgage servicing rights	$ 1,705,254	$ 544,562	[1]
Interests in MSR	0	69,316	[1]
Other assets	247,490	197,683	[1]
Total assets	85,406,764	76,764,064	[1]
Liabilities
Other liabilities	912,895	94,423	[1]
Total liabilities	74,455,209	63,568,739	[1]
Consolidated VIEs
Assets
Cash and cash equivalents	3,500	16,200
Consolidated VIEs | MSR VIEs
Assets
Cash and cash equivalents	3,533	16,187
Loans	1,378	2,347
Mortgage servicing rights	37	7,254
Interests in MSR	0	69,316
Other assets	4,068	10,406
Total assets	9,016	105,510
Liabilities
Payable for unsettled trades	2,152	1,911
Other liabilities	3,636	14,582
Total liabilities	$ 5,788	$ 16,493

[1] (1)Derived from the audited consolidated financial statements at December 31, 2021.