Intangible Assets 5 (Details) $ in Thousands	3 Months Ended
	Jan. 31, 2017 USD ($)
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	$ 52,016
Accumulated amortization	(40)
Net carrying amount	$ 51,976
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	12 years 5 months
Mutual Fund Management Contract Acquired [Member]
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	$ 47,700
Net carrying amount	47,700
Client Relationships Acquired [Member]
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	320
Accumulated amortization	(2)
Net carrying amount	$ 318
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	14 years 11 months
Trademark Acquired [Member]
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	$ 3,357
Accumulated amortization	(20)
Net carrying amount	$ 3,337
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	13 years 11 months
Research System [Member]
Amortizing Intangible Assets Acquired [Line Items]
Gross carrying amount	$ 639
Accumulated amortization	(18)
Net carrying amount	$ 621
Weighted-average remaining amortization period for acquired finite-lived intangible assets (in years)	2 years 11 months