Intangible Assets 3 (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Oct. 31, 2017
Amortizing intangible assets:
Accumulated amortization	$ (107,003)	$ (104,764)
Total Intangible assets
Gross intangible assets	194,576	194,576
Accumulated amortization	(107,003)	(104,764)
Intangible assets, net	87,573	89,812
Mutual Fund Management Contract Acquired [Member]
Non-amortizing intangible assets:
Net carrying amount	54,408	54,408
Client Relationships Acquired [Member]
Amortizing intangible assets:
Gross carrying amount	134,247	134,247
Accumulated amortization	(105,390)	(103,314)
Net carrying amount	28,857	30,933
Total Intangible assets
Accumulated amortization	(105,390)	(103,314)
Intellectual Property Acquired [Member]
Amortizing intangible assets:
Gross carrying amount	1,025	1,025
Accumulated amortization	(469)	(452)
Net carrying amount	556	573
Total Intangible assets
Accumulated amortization	(469)	(452)
Trademark Acquired [Member]
Amortizing intangible assets:
Gross carrying amount	4,257	4,257
Accumulated amortization	(913)	(821)
Net carrying amount	3,344	3,436
Total Intangible assets
Accumulated amortization	(913)	(821)
Research System Aquired [Member]
Amortizing intangible assets:
Gross carrying amount	639	639
Accumulated amortization	(231)	(177)
Net carrying amount	408	462
Total Intangible assets
Accumulated amortization	$ (231)	$ (177)