VARIABLE INTEREST ENTITIES - Schedule of Financial Condition of VIEs Reflected in Consolidated Statements of Financial Condition (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Mortgage servicing rights	$ 1,421,420	$ 544,562	[1]
Interests in MSR	83,622	69,316	[1]
Other assets	272,865	197,683	[1]
Total assets	73,637,249	76,764,064	[1]
Liabilities
Other liabilities	158,560	94,423	[1]
Total liabilities	62,547,349	63,568,739	[1]
Consolidated VIEs
Assets
Cash and cash equivalents	2,400	16,200
Consolidated VIEs | MSR VIEs
Assets
Cash and cash equivalents	2,446	16,187
Loans	1,548	2,347
Mortgage servicing rights	41	7,254
Interests in MSR	83,622	69,316
Other assets	6,271	10,406
Total assets	93,928	105,510
Liabilities
Payable for unsettled trades	2,152	1,911
Other liabilities	5,470	14,582
Total liabilities	$ 7,622	$ 16,493

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