Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income before noncontrolling interests	$ 77,740	$ 77,572
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	(79,737)	(90,204)
Change in the fair value of premiums and origination fees	(3,527)	1,921
Amortization and depreciation	69,124	65,198
Provision (benefit) for credit losses	323	(225)
Other operating activities, net	(318,073)	365,850
Net cash provided by (used in) operating activities	(254,150)	420,112
Cash flows from investing activities
Capital expenditures	(1,151)	(2,049)
Purchase of pledged available-for-sale securities	(38,566)
Funding of preferred equity investments	(1,100)	(11,385)
Distributions from Interim Program JV	1,209
Acquisitions, net of cash acquired	(33,102)	(15,000)
Purchase of mortgage servicing rights	(1,814)
Originations of loans held for investment	(151,754)	(167,079)
Principal collected on loans held for investment upon payoff	87,688	100,980
Net cash provided by (used in) investing activities	(138,590)	(94,533)
Cash flows from financing activities
Borrowings (repayments) of warehouse notes payable, net	323,153	(414,266)
Borrowings of interim warehouse notes payable	50,455	128,660
Repayments of interim warehouse notes payable	(61,049)	(75,615)
Repayments of note payable	(552)	(552)
Proceeds from issuance of common stock	8,067	2,885
Repurchase of common stock	(21,457)	(17,590)
Cash dividends paid	(15,699)
Payment of contingent consideration	(5,150)	0
Debt issuance costs	(1,881)	(1,053)
Net cash provided by (used in) financing activities	275,887	(377,531)
Net increase (decrease) in cash, cash equivalents, restricted cash, and restricted cash equivalents (NOTE 2)	(116,853)	(51,952)
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period	286,680	211,359
Total of cash, cash equivalents, restricted cash, and restricted cash equivalents at end of period	169,827	159,407
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	21,338	22,513
Cash paid for income taxes	$ 31,299	$ 27,748