Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net income before noncontrolling interests	$ 43,060	$ 15,333
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	(45,535)	(23,917)
Change in the fair value of premiums and origination fees	3,878	(63)
Amortization and depreciation	32,338	25,155
Provision (benefit) for credit losses	(132)	(409)
Other operating activities, net	610,493	1,949,158
Net cash provided by (used in) operating activities	644,102	1,965,257
Cash flows from investing activities
Capital expenditures	(844)	(484)
Funding of preferred equity investments	(4,052)	(1,291)
Net cash paid to increase ownership interest in a previously held equity method investment		(1,058)
Acquisitions, net of cash received	(15,000)
Originations of loans held for investment	(139,442)
Principal collected on loans held for investment	48,400	41,548
Net cash provided by (used in) investing activities	(110,938)	38,715
Cash flows from financing activities
Borrowings (repayments) of warehouse notes payable, net	(650,492)	(1,999,202)
Borrowings of interim warehouse notes payable	102,377
Repayments of interim warehouse notes payable	(36,300)	(30,469)
Repayments of note payable	(276)	(276)
Proceeds from issuance of common stock	2,884	3,291
Repurchase of common stock	(17,541)	(8,345)
Debt issuance costs	(325)
Net cash provided by (used in) financing activities	(599,673)	(2,035,001)
Net increase (decrease) in cash, cash equivalents, restricted cash, and restricted cash equivalents (NOTE 2)	(66,509)	(31,029)
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	146,958	183,455
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	11,739	11,880
Cash paid for income taxes	$ 12,632	$ 11,315