Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income before noncontrolling interests	$ 82,595	$ 51,422	$ 41,530
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	(133,631)	(96,515)	(91,972)
Change in the fair value of premiums and origination fees (NOTE 2)	1,959	2,059	9,457
Amortization and depreciation	98,173	80,138	75,955
Amortization and depreciation	96,193	79,367	72,876
Stock compensation-equity and liability classified	14,084	9,994	9,194
Provision for credit losses	1,644	2,206	1,322
Deferred tax expense	16,919	10,260	18,211
Originations of loans held for sale	(12,111,553)	(8,103,452)	(5,818,792)
Sales of loans to third parties	10,688,356	7,326,908	6,616,515
Amortization of deferred loan fees and costs	(1,775)	(1,273)	(200)
Amortization of debt issuance costs and debt discount	3,756	4,174	3,036
Origination fees received from loans held for investment	1,429	2,145	691
Tax shortfall (benefit) from vesting of equity awards	(1,410)	38	(1,257)
Cash paid to settle risk-sharing obligations	(795)	(2,138)	(5,290)
Changes in:
Restricted cash and pledged securities	4,268	(26,495)	(14,467)
Servicing fees and other receivables	(623)	1,943	9,746
Other assets	(2,217)	(11,759)	6,755
Accounts payable and other liabilities	7,739	12,415	(19,257)
Performance deposits from borrowers	(8,556)	8,434	(4,269)
Net cash provided by (used in) operating activities	(1,339,638)	(729,496)	836,908
Cash flows from investing activities
Capital expenditures	(1,413)	(2,525)	(4,519)
Acquisitions, net of cash acquired	(12,767)	(23,417)
Originations of loans held for investment	(180,375)	(339,802)	(147,820)
Principal collected on loans held for investment	172,323	250,104	21,700
Net cash provided by (used in) investing activities	(22,232)	(115,640)	(130,639)
Cash flows from financing activities
Borrowings (repayments) of warehouse notes payable, net	1,423,911	774,935	(797,275)
Borrowings of interim warehouse notes payable	137,397	248,024	102,755
Repayments of interim warehouse notes payable	(125,542)	(179,941)	(16,912)
Borrowings of note payable			173,258
Repayments of note payable	(4,819)	(1,750)	(80,925)
Proceeds from issuance of common stock	7,553	7,756	1,139
Repurchase of common stock	(50,261)	(37,593)	(3,025)
Secured borrowings			22,050
Repayments of secured borrowings		(22,050)
Debt issuance costs	(4,145)	(1,416)	(3,055)
Tax benefit (shortfall) from vesting of equity awards	1,410	(38)	1,257
Net cash provided by (used in) financing activities	1,385,504	787,927	(600,733)
Net increase (decrease) in cash and cash equivalents	23,634	(57,209)	105,536
Cash and cash equivalents at beginning of period	113,354	170,563	65,027
Cash and cash equivalents at end of period	136,988	113,354	170,563
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	32,854	23,950	14,813
Cash paid for taxes	$ 34,832	$ 18,481	$ 881