Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income before noncontrolling interests	$ 70,530	$ 58,052
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Gains attributable to the fair value of future servicing rights, net of guaranty obligation	(52,730)	(57,935)
Change in the fair value of premiums and origination fees	2,883	21,562
Amortization and depreciation	56,152	46,871
Provision (benefit) for credit losses	(9,498)	(11,320)
Gain from revaluation of previously held equity-method investment	(39,641)
Originations of loans held for sale	(3,185,019)	(3,577,153)
Proceeds from transfers of loans held for sale	4,198,206	4,917,187
Other operating activities, net	(68,955)	(81,572)
Net cash provided by (used in) operating activities	971,928	1,315,692
Cash flows from investing activities
Capital expenditures	(11,790)	(1,794)
Purchase of equity-method investments	(5,941)	(1,124)
Purchase of pledged available-for-sale ("AFS") securities	(7,010)	(2,000)
Proceeds from prepayment and sale of pledged AFS securities	1,672	20,884
Investments in joint ventures	(5,040)	(18,445)
Distributions from joint ventures	9,241	11,419
Acquisitions, net of cash acquired	(78,465)	(7,506)
Originations of loans held for investment	(107)	(33,750)
Principal collected on loans held for investment upon payoff	53,000	113,495
Net cash provided by (used in) investing activities	(44,440)	81,179
Cash flows from financing activities
Borrowings (repayments) of warehouse notes payable, net	(1,006,545)	(1,400,704)
Borrowings of interim warehouse notes payable		25,313
Repayments of interim warehouse notes payable	(11,200)	(29,534)
Repayments of notes payable	(13,759)	(745)
Proceeds from issuance of common stock	153	12,606
Repurchase of common stock	(27,049)	(13,374)
Cash dividends paid	(20,077)	(16,052)
Payment of contingent consideration	(17,612)
Debt issuance costs	(567)	(769)
Net cash provided by (used in) financing activities	(1,096,656)	(1,423,259)
Net increase in cash, cash equivalents, restricted cash, and restricted cash equivalents (NOTE 2)	(169,168)	(26,388)
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period	393,180	358,002
Total of cash, cash equivalents, restricted cash, and restricted cash equivalents at end of period	224,012	331,614
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	13,037	$ 9,621
Cash paid for income taxes	$ 1,290