VARIABLE INTEREST ENTITIES - Statement of Financial Condition of VIEs Reflected in Consolidated Statements of Financial Condition (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	[1]	$ 1,576,714	$ 1,342,090
Mortgage servicing rights		1,748,209	544,562
Interests in MSR		0	69,316
Other assets		233,003	197,683
Total assets		81,850,712	76,764,064
Liabilities
Other liabilities		74,269	94,423
Total liabilities		70,481,286	63,568,739
Consolidated VIEs
Assets
Cash and cash equivalents		2,200	16,200
Consolidated VIEs | MSR VIE
Assets
Cash and cash equivalents		2,239	16,187
Loans		1,293	2,347
Mortgage servicing rights		27	7,254
Interests in MSR			69,316
Other assets		1,238	10,406
Total assets		4,797	105,510
Liabilities
Payable for unsettled trades		2,152	1,911
Other liabilities		1,409	14,582
Total liabilities		$ 3,561	$ 16,493

[1] (1) Includes cash of consolidated Variable Interest Entities (“VIEs”) of $2.2 million and $16.2 million at December 31, 2022 and 2021, respectively.