Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income before noncontrolling interests	$ 130,275	$ 115,497
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	(132,995)	(119,313)
Change in the fair value of premiums and origination fees	920	(2,226)
Amortization and depreciation	112,920	105,863
Provision (benefit) for credit losses	2,864	842
Originations of loans held for sale	(12,098,180)	(10,472,456)
Sales of loans to third parties	11,910,016	9,281,943
Other operating activities, net	(18,848)	(7,608)
Net cash provided by (used in) operating activities	(93,028)	(1,097,458)
Cash flows from investing activities
Capital expenditures	(4,166)	(1,965)
Purchase of pledged available-for-sale ("AFS") securities	(25,611)	(60,088)
Proceeds from prepayment of pledged debt AFS securities	18,116
Funding of preferred equity investments		(1,100)
Proceeds from the payoff of preferred equity investments		30,624
Distributions from (investments in) joint ventures	(10,377)	(890)
Acquisitions, net of cash acquired	(7,180)	(33,102)
Purchase of mortgage servicing rights		(1,814)
Originations of loans held for investment	(154,302)	(225,369)
Principal collected on loans held for investment upon payoff	200,315	87,688
Net cash provided by (used in) investing activities	16,795	(206,016)
Cash flows from financing activities
Borrowings (repayments) of warehouse notes payable, net	53,372	1,228,850
Borrowings of interim warehouse notes payable	85,678	50,455
Repayments of interim warehouse notes payable	(38,527)	(61,049)
Repayments of note payable	(2,250)	(828)
Proceeds from issuance of common stock	4,453	8,939
Repurchase of common stock	(29,850)	(26,712)
Cash dividends paid	(27,936)	(23,600)
Payment of contingent consideration	(6,450)	(5,150)
Debt issuance costs	(2,465)	(2,550)
Secured borrowings		70,052
Net cash provided by (used in) financing activities	36,025	1,238,407
Net increase (decrease) in cash, cash equivalents, restricted cash, and restricted cash equivalents (NOTE 2)	(40,208)	(65,067)
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period	120,348	286,680
Total of cash, cash equivalents, restricted cash, and restricted cash equivalents at end of period	80,140	221,613
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	51,085	35,315
Cash paid for income taxes	$ 33,665	$ 37,168