Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities:
Net income (loss)	$ 4,137	$ (6,374)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Net fair value adjustments of loans, notes and certificates	167	5
Change in fair value of loan servicing liabilities	(2,078)	424
Change in fair value of loan servicing assets	(232)	(1,315)
Stock-based compensation, net	15,021	11,593
Excess tax benefit from share-based awards	(39)	0
Depreciation and amortization	6,655	4,693
Gain on sales of loans	(4,699)	(95)
Other, net	30	18
Purchase of whole loans to be sold	(1,308,463)	(622,050)
Proceeds from sales of whole loans	1,308,463	622,145
Net change in operating assets and liabilities:
Accrued interest receivable	(1,027)	(2,315)
Other assets	657	(2,074)
Due from related parties	(242)	(57)
Accounts payable	(123)	(1,812)
Accrued interest payable	1,393	2,719
Accrued expenses and other liabilities	(9,679)	990
Net cash provided by operating activities	9,941	6,495
Cash Flows from Investing Activities:
Purchases of loans	(921,825)	(852,827)
Principal payments received on loans	586,159	369,379
Proceeds from recoveries and sales of charged-off loans	10,191	3,472
Purchases of securities available for sale	(3,661)	0
Proceeds from maturities, redemptions and paydowns of securities available for sale	17,374	0
Investment in Cirrix Capital	(10,000)	0
Net change in restricted cash	(23,752)	7,516
Purchases of property, equipment and software, net	(10,483)	(6,240)
Net cash used in investing activities	(355,997)	(478,700)
Cash Flows from Financing Activities:
Change in payable to investors	(1,245)	(7,924)
Proceeds from issuances of notes and certificates	901,258	852,715
Proceeds from secured borrowings	15,113	0
Principal payments on notes and certificates	(583,982)	(365,711)
Payments on notes and certificates from recoveries/sales of related charged-off loans	(10,177)	(3,461)
Repurchases of common stock	(19,485)	0
Proceeds from stock option exercises and other	4,846	863
Excess tax benefit from share-based awards	39	0
Other financing activities	0	68
Net cash provided by financing activities	306,367	476,550
Net (Decrease) Increase in Cash and Cash Equivalents	(39,689)	4,345
Cash and Cash Equivalents, Beginning of Period	623,531	869,780
Cash and Cash Equivalents, End of Period	583,842	874,125
Supplemental Cash Flow Information:
Cash paid for interest	175,224	110,562
Accruals for property, equipment and software	$ 4,286	$ 1,184