INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating losses and tax credit carryforwards	$ 23,627	$ 76,642
Basis differences related to assets and investments	32,447	85,104
Goodwill	26,289	30,485
Accrued expenses	44,572	20,171
Other	1,573	4,632
Total deferred tax assets	128,508	217,034
Less: valuation allowance	0	0
Net deferred tax assets	128,508	217,034
Deferred tax liabilities:
Mortgage servicing rights	(791,691)	(594,801)
Basis differences related to assets and investments	(26,832)	(21,672)
Fixed asset depreciation	(19,302)	(14,495)
Unrealized mark to market	0	(26,021)
Other	(2,538)	(735)
Total deferred tax (liability)	(840,363)	(657,724)
Net deferred tax assets (liability)	(711,855)	$ (440,690)
Federal and State Tax Authority
Deferred tax liabilities:
Net operating loss carryforwards	50,000
Net operating loss carryforward that will begin to expire in 2034	$ 12,800