Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income before noncontrolling interests	$ 112,280	$ 77,305
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	(140,985)	(127,724)
Change in the fair value of premiums and origination fees	4,547	(17,728)
Amortization and depreciation	97,541	80,824
Provision (benefit) for credit losses	(216)	166
Other operating activities, net	(1,401,599)	1,287,414
Net cash provided by (used in) operating activities	(1,328,432)	1,300,257
Cash flows from investing activities
Capital expenditures	(4,638)	(1,821)
Capital invested in Interim Program JV	(6,184)
Funding of preferred equity investments	(16,321)	(15,538)
Net cash paid to increase ownership interest in a previously held equity method investment		(1,058)
Acquisitions, net of cash received	(15,000)
Purchase of mortgage servicing rights		(42,705)
Originations of loans held for investment	(167,680)	(218,958)
Principal collected on loans held for investment upon payoff	117,479	187,820
Principal collected on loans held for investment upon formation of Interim Program JV	119,750
Net cash provided by (used in) investing activities	27,406	(92,260)
Cash flows from financing activities
Borrowings (repayments) of warehouse notes payable, net	1,360,969	(1,239,677)
Borrowings of interim warehouse notes payable	128,661	148,478
Repayments of interim warehouse notes payable	(175,934)	(138,898)
Repayments of note payable	(828)	(829)
Proceeds from issuance of common stock	2,887	3,439
Repurchase of common stock	(28,863)	(12,374)
Debt issuance costs	(1,689)	(2,425)
Distributions to noncontrolling interests		(5)
Net cash provided by (used in) financing activities	1,285,203	(1,242,291)
Net increase (decrease) in cash, cash equivalents, restricted cash, and restricted cash equivalents (NOTE 2)	(15,823)	(34,294)
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period	213,467	214,484
Total of cash, cash equivalents, restricted cash, and restricted cash equivalents at end of period	197,644	180,190
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	34,286	28,592
Cash paid for income taxes	$ 38,707	$ 23,061