Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 7,726	$ 5,839
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Gains attributable to fair value of future servicing rights, net of guaranty obligation	(20,671)	(9,523)
Gains attributable to fair value of premium and origination fees	13,339	14
Gain on sale of MSR, less prepayment of MSR		(2)
Provision for risk-sharing obligations	401	1,224
Amortization and depreciation	18,552	7,259
Originations of loans held for sale	(1,575,750)	(648,055)
Sales of loans to third parties	2,184,346	641,398
Amortization of deferred loan fees and costs	(19)	(4)
Stock compensation	2,160	681
Tax benefit from vesting of equity awards	(161)
Amortization of leasehold inducement		39
Cash allowance received from landlord		1,301
Cash paid to settle risk-sharing obligations		(1,619)
Changes in:
Restricted cash and pledged securities	(1,720)	1,441
Servicing fees and other receivables	11,348	3,305
Derivative fair value adjustments		15
Other assets	5,880	(85)
Accounts payable and other accruals	(30,651)	(19,986)
Performance deposits from borrowers	(2,809)	(4,619)
Net cash provided by (used in) operating activities	611,971	(21,377)
Cash flows from investing activities:
Capital expenditures	(1,188)	(1,922)
Net increase in loans held for investment		(6,943)
Net cash used in investing activities	(1,188)	(8,865)
Cash flows from financing activities:
(Repayments) borrowings of warehouse notes payable, net	(608,318)	18,259
Repayments of notes payable	(2,075)	(900)
Proceeds from issuance of common stock	119	1
Repurchase of common stock	(292)	(124)
Tax benefit from vesting of equity awards	161
Net cash (used in) provided by financing activities	(610,405)	17,236
Net increase (decrease) in cash and cash equivalents	378	(13,006)
Cash and cash equivalents at beginning of period	65,027	53,817
Cash and cash equivalents at end of period	65,405	40,811
Supplemental Disclosure of Cash Flow Information:
Cash paid to third parties for interest	4,762	1,180
Cash paid for taxes	$ 194	$ 3,314