DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Realized and Unrealized Gains on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	$ 101,026	$ (135,083)	$ 708,377	$ (39,606)
Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	(122,323)	(73,871)	(245,338)	(387,835)
Gain on origination and sale of loans, net | Forward sale contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	259,360	(29,867)	1,221,817	477,215
Gain on origination and sale of loans, net | Interest rate swap futures
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	2,279	(29,683)	(82,251)	(81,891)
Gain on origination and sale of loans, net | Put options
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	12,547	19,891	128,706	47,063
Change in fair value of servicing rights, net | Forward sale contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	(16,293)	(5,838)	(113,920)	(84,842)
Change in fair value of servicing rights, net | Interest rate swap futures
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	(31,598)	(14,033)	(197,177)	(6,855)
Change in fair value of servicing rights, net | Put options
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative financial instruments	$ (2,946)	$ (1,682)	$ (3,460)	$ (2,461)