Subsequent Events	6 Months Ended
Apr. 30, 2012
Subsequent Events Disclosure [Abstract]
Subsequent Events [Text Block]	20. Subsequent Events In April 2012, the non-controlling interest holders of Parametric Portfolio Associates exercised a put option requiring the Company to purchase an additional interest in Parametric Portfolio Associates for approximately $17.0 million. The transaction settled on May 1, 2012 and increased the Company's capital ownership interest from 94.8 percent to 96.6 percent. The payment was treated as an equity transaction and reduced redeemable non-controlling interests at closing. The Company entered into a $300.0 million senior unsecured revolving credit facility on June 4, 2012, which replaces the Company's previous senior unsecured revolving credit facility. The new credit facility has a three-year term, expiring on June 4, 2015. Under the facility, the Company may borrow up to $300.0 million at LIBOR-based rates of interest that vary depending on the level of usage of the facility and credit ratings of the Company. The credit facility is unsecured, contains financial covenants with respect to leverage and interest coverage, and requires the Company to pay an annual commitment fee on any unused portion.

Subsequent Events

6 Months Ended

Apr. 30, 2012

Subsequent Events Disclosure [Abstract]

20. Subsequent Events

In April 2012, the non-controlling interest holders of Parametric Portfolio Associates exercised a put option requiring the Company to purchase an additional interest in Parametric Portfolio Associates for approximately $17.0 million. The transaction settled on May 1, 2012 and increased the Company's capital ownership interest from 94.8 percent to 96.6 percent. The payment was treated as an equity transaction and reduced redeemable non-controlling interests at closing.

The Company entered into a $300.0 million senior unsecured revolving credit facility on June 4, 2012, which replaces the Company's previous senior unsecured revolving credit facility. The new credit facility has a three-year term, expiring on June 4, 2015. Under the facility, the Company may borrow up to $300.0 million at LIBOR-based rates of interest that vary depending on the level of usage of the facility and credit ratings of the Company. The credit facility is unsecured, contains financial covenants with respect to leverage and interest coverage, and requires the Company to pay an annual commitment fee on any unused portion.