Investments in Unconsolidated Entities (Details 4) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Oct. 31, 2016
Condensed Statements of Operations and Comprehensive Income:
Revenues	$ 189,714	$ 60,755	$ 690,441	$ 226,772
Cost of revenues	99,102	42,910	389,996	145,401
Other expenses	22,472	11,347	62,193	29,723
Total expenses	121,574	54,257	452,189	175,124
Gain on disposition of loans and REO	7,891	3,413	39,530	38,102
Income (loss) from operations	76,031	9,911	277,782	89,750
Other income	1,678	1,769	11,175	4,121
Income before income taxes	77,709	11,680	288,957	93,871
Income tax provision	1,138	0	7,453	0
Net income including earnings from noncontrolling interests	76,571	11,680	281,504	93,871
Less: (income) loss attributable to noncontrolling interest	(3,328)	3,819	(16,417)	(11,204)
Net income (loss) attributable to controlling interest	73,243	15,499	265,087	82,667
Other comprehensive income (loss)	0	0	0	100
Total comprehensive income (loss)	73,243	15,499	265,087	82,767
Income (loss) from unconsolidated entities	$ 19,925	$ 4,998	$ 112,274	$ 22,754	$ 40,748