CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) earnings	$ (45,445)	$ 2,317	$ (138,970)	$ 13,384
Loss on sale of mortgage servicing rights		8		90
Change in fair value of mortgage servicing rights	5,445	11,177	(4,127)	20,038
Loss on extinguishment of debt				1,265
Gain on sale of mortgage loans			(71,854)	(106,070)
Change in fair value of mortgage loans held-for-sale			12,182	(8,262)
Change in fair value of derivatives lending, net			425	(2,167)
Provision (recovery) for repurchases			5,435	192
Origination of mortgage loans held-for-sale			(3,207,525)	(5,457,907)
Sale and principal reduction on mortgage loans held-for-sale			3,468,824	5,345,665
Losses (gains) from REO	649	(2,734)	46	(8,484)
Change in fair value of net trust assets, excluding REO			3,190	1,906
Change in fair value of long-term debt	785	(104)	(697)	2,657
Accretion of interest income and expense			27,126	69,075
Amortization of intangible and other assets			3,284	3,576
Accretion of contingent consideration		396		1,948
Change in fair value of contingent consideration		(4,798)		(11,052)
Amortization of debt issuance costs and discount on note payable			62	145
Stock-based compensation			810	1,972
Impairment of deferred charge				591
Aggregate impairment charges	29,925		104,587
Impairment of intangible assets	4,897		18,347
Excess tax benefit from share based compensation				12
Change in deferred tax assets, net			4,315
Net change in other assets			(5,558)	(12,733)
Net change in other liabilities			(3,352)	1,016
Net cash provided by (used in) operating activities			216,550	(143,143)
CASH FLOWS FROM INVESTING ACTIVITIES:
Net change in securitized mortgage collateral			406,456	507,552
Proceeds from the sale of mortgage servicing rights				805
Purchase of mortgage servicing rights				(5,618)
Finance receivable advances to customers			(401,357)	(714,221)
Repayments of finance receivables			442,403	716,246
Net change in mortgages held-for-investment				2
Purchase of premises and equipment			(670)	(463)
Purchase of investment securities available-for-sale			(500)
Proceeds from the sale of REO			15,992	24,159
Net cash provided by investing activities			462,324	528,462
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock				55,454
Repayment of MSR financing			(50,133)	(25,000)
Borrowings under MSR financing			77,000	50,133
Repayment of warehouse borrowings			(3,296,280)	(5,063,915)
Borrowings under warehouse agreements			3,036,069	5,234,925
Repayment of term financing				(30,000)
Payment of acquisition related contingent consideration			(554)	(16,152)
Repayment of securitized mortgage borrowings			(450,555)	(595,291)
Principal payments on capital lease			(154)	(249)
Debt issuance costs				(100)
Tax payments on stock based compensation awards			(143)	(341)
Issuance of deferred stock units			1
Proceeds from exercise of stock options			433	570
Net cash used in financing activities			(684,316)	(389,966)
Net change in cash, cash equivalents and restricted cash			(5,442)	(4,647)
Cash, cash equivalents and restricted cash at beginning of period			39,099	46,067	$ 46,067
Cash, cash equivalents and restricted cash at end of period	$ 33,657	$ 41,420	33,657	41,420	$ 39,099
NON-CASH TRANSACTIONS:
Transfer of securitized mortgage collateral to real estate owned			17,089	15,367
Mortgage servicing rights retained from loan sales and issuance of mortgage backed securities			22,473	42,728
Common stock issued upon issuance of deferred stock units			$ 606
Common stock issued upon long-term debt exchange				$ 7,033