Intangible Assets 1 (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Oct. 31, 2012
Amortizing intangible assets:
Accumulated amortization	$ (60,925)	$ (58,807)
Intangible assets
Gross intangible assets	142,535	118,035
Accumulated amortization	(60,925)	(58,807)
Intangible assets, net	81,610	59,228
Mutual Fund Management Contract Acquired [Member]
Non-amortizing intangible assets:
Net carrying amount	6,708	6,708
Client Relationships Acquired [Member]
Amortizing intangible assets:
Gross carrying amount	133,927	110,327
Accumulated amortization	(60,772)	(58,681)
Net carrying amount	73,155	51,646
Intangible assets
Accumulated amortization	(60,772)	(58,681)
Intellectual Property Acquired [Member]
Amortizing intangible assets:
Gross carrying amount	1,000	1,000
Accumulated amortization	(142)	(126)
Net carrying amount	858	874
Intangible assets
Accumulated amortization	(142)	(126)
Trademark Acquired [Member]
Amortizing intangible assets:
Gross carrying amount	900
Accumulated amortization	(11)
Net carrying amount	889
Intangible assets
Accumulated amortization	$ (11)