Intangible Assets 5 (Details) $ in Thousands	6 Months Ended
	Apr. 30, 2017 USD ($)
Amortizing Intangible Assets Acquired [Line Items]
Accumulated amortization	$ (158)
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	12 years 4 months
Total Acquired Intangible Assets [Abstract]
Gross carrying amount	$ 52,016
Accumulated amortization	(158)
Net carrying amount	51,858
Mutual Fund Management Contract Acquired [Member]
Non Amortizing Intangible Assets Acquired [Line Items]
Net carrying amount	47,700
Client Relationships Acquired [Member]
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	320
Accumulated amortization	(7)
Net carrying amount	$ 313
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	14 years 8 months
Total Acquired Intangible Assets [Abstract]
Accumulated amortization	$ (7)
Trademark Acquired [Member]
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	3,357
Accumulated amortization	(80)
Net carrying amount	$ 3,277
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	13 years 8 months
Total Acquired Intangible Assets [Abstract]
Accumulated amortization	$ (80)
Research System [Member]
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	639
Accumulated amortization	(71)
Net carrying amount	$ 568
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	2 years 8 months
Total Acquired Intangible Assets [Abstract]
Accumulated amortization	$ (71)