FAIR VALUE - Gains and Losses in Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Assets:
Gain on origination and sale of loans, net	$ 427,458	$ 198,249	$ 957,001	$ 312,367
Losses included in change in fair value of servicing rights	(223,500)	(60,300)	(110,600)	(179,700)
Level 3 | Contingent Consideration
Liabilities:
Total net gains (losses) included in earnings		(10,473)		(12,980)
Change in unrealized gains relating to assets and liabilities still held at period end		(10,473)		(12,980)
Level 3 | Servicing Rights, net
Assets:
Total net gains (losses) included in earnings	203,937	137,989	846,359	132,689
Change in unrealized gains relating to assets and liabilities still held at period end	296,555	179,778	1,038,347	199,580
Level 3 | Interest Rate Lock Commitments
Derivatives:
Total net gains (losses) included in earnings	86,303	204,777	(313,964)	391,306
Change in unrealized gains relating to assets and liabilities still held at period end	$ 333,081	$ 519,514	$ 333,081	$ 519,514