CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (315,141)	$ 454,137
Adjustments to reconcile net (loss) income to net
Depreciation and amortization expense	21,867	17,139
Amortization of operating lease right-of-use asset	11,272	11,594
Amortization of debt issuance costs	8,067	6,744
Gain on origination and sale of loans	(809,990)	(2,041,979)
Gain on sale of servicing rights	(20,041)	(11,478)
Fair value change in trading securities	13,883	0
Provision for loss obligation on sold loans and servicing rights	108,120	5,752
(Decrease) increase in provision for deferred income taxes	(39,643)	202,871
Fair value change in derivative assets	191,682	303,639
Fair value change in derivative liabilities	34,961	(109,364)
Premium (paid) received on derivatives	(150,624)	5,061
Purchase of options contracts	0	(10,383)
Fair value change in loans held for sale	174,519	33,191
Fair value change in servicing rights	(154,290)	122,120
Stock-based compensation expense	7,021	61,752
Originations of loans	(37,142,855)	(75,814,894)
Proceeds from sales of loans	40,992,588	75,281,888
Proceeds from principal payments	100,885	66,506
Payments to investors for loan repurchases	(376,387)	(671,166)
Gain on extinguishment of debt	(10,528)	0
Goodwill impairment	40,736	0
Disbursements from joint ventures	4,565	5,790
Other changes in operating assets and liabilities	(19,739)	(189,193)
Net cash provided by (used in) operating activities	2,670,928	(2,270,273)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(28,844)	(30,400)
Proceeds from sale of servicing rights	387,968	176,995
Cash flows received on trading securities	4,109	0
Investments in joint ventures	(350)	(1,115)
Return of capital from joint ventures	0	189
Net cash flows provided by investing activities	362,883	145,669
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings on warehouse and other lines of credit	42,522,401	85,132,551
Repayment of borrowings on warehouse and other lines of credit	(45,714,257)	(83,211,614)
Proceeds from debt obligations	2,099,247	1,044,221
Payments on debt obligations	(1,290,746)	(276,947)
Payments of debt issuance costs	(4,135)	(13,913)
Payments on financing lease obligation	0	(1,367)
Treasury stock purchased to net settle and withhold taxes on vested shares	(235)	0
Dividends and shareholder distributions	(117,107)	(400,298)
Net cash (used in) provided by financing activities	(2,504,832)	2,272,633
Net change in cash and cash equivalents and restricted cash	528,979	148,029
Cash and cash equivalents and restricted cash at beginning of the period	620,596	488,689
Cash and cash equivalents and restricted cash at end of the period	1,149,575	636,718
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid (received) during the period for interest	120,060	126,497
Cash paid (received) during the period for income taxes	24,223	7,628
Supplemental disclosure of noncash investing and financing activities
Operating leases right-of-use assets obtained in exchange for lease liabilities	8,656	5,285
Trading securities retained in securitizations	50,426	16,757
Purchase of equipment under financing leases	$ 0	$ 168