Investments in Unconsolidated Entities (Details 4) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Oct. 31, 2016
Condensed Statements of Operations and Comprehensive Income:
Revenues	$ 205,024	$ 123,531	$ 500,727	$ 166,018
Cost of revenues	125,188	66,979	290,894	102,492
Other expenses	18,588	9,065	39,722	18,375
Total expenses	143,776	76,044	330,616	120,867
Gain on disposition of loans and REO	22,753	8,706	31,639	34,689
Income (loss) from operations	84,001	56,193	201,750	79,840
Other income	6,912	1,346	9,497	2,351
Income before income taxes	90,913	57,539	211,247	82,191
Income tax provision	2,487	0	6,314	0
Net income including earnings from noncontrolling interests	88,426	57,539	204,933	82,191
Less: (income) loss attributable to noncontrolling interest	(11,009)	(3,413)	(13,089)	(15,023)
Net income (loss) attributable to controlling interest	77,417	54,126	191,844	67,168
Other comprehensive income (loss)	0	13	0	100
Total comprehensive income (loss)	77,417	54,139	191,844	67,268
Income (loss) from unconsolidated entities	$ 45,904	$ 9,118	$ 92,349	$ 17,756	$ 40,748