Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income before noncontrolling interests	$ 36,707	$ 43,060
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	(32,693)	(45,535)
Change in the fair value of premiums and origination fees	945	3,878
Amortization and depreciation	33,635	32,338
Provision (benefit) for credit losses	(477)	(132)
Other operating activities, net	138,920	610,509
Net cash provided by (used in) operating activities	177,037	644,118
Cash flows from investing activities
Capital expenditures	(516)	(844)
Purchase of pledged available-for-sale securities	(18,634)
Funding of preferred equity investments	(1,100)	(4,052)
Distributions from Interim Program JV	1,055
Acquisitions, net of cash received		(15,000)
Originations of loans held for investment	(7,319)	(139,442)
Principal collected on loans held for investment upon payoff	14,126	48,400
Net cash provided by (used in) investing activities	(12,388)	(110,938)
Cash flows from financing activities
Borrowings (repayments) of warehouse notes payable, net	(124,705)	(650,492)
Borrowings of interim warehouse notes payable		102,377
Repayments of interim warehouse notes payable	(10,594)	(36,300)
Repayments of note payable	(276)	(276)
Proceeds from issuance of common stock	4,851	2,884
Repurchase of common stock	(21,400)	(17,541)
Cash dividends paid	(7,838)
Payment of contingent consideration	(5,150)	0
Debt issuance costs	(1,086)	(325)
Net cash provided by (used in) financing activities	(166,198)	(599,673)
Net increase (decrease) in cash, cash equivalents, restricted cash, and restricted cash equivalents (NOTE 2)	(1,549)	(66,493)
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	285,131	144,866
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	10,500	11,739
Cash paid for income taxes	$ 805	$ 12,632