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Goodwill (Factors Used To Measure Goodwill In Income Approach) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2011
Wealth Management Reporting Unit [Member]
years
May 31, 2011
Wealth Management Reporting Unit [Member]
May 31, 2010
Wealth Management Reporting Unit [Member]
May 31, 2011
Annual [Member]
May 31, 2010
Annual [Member]
Goodwill [Line Items]     
Goodwill $ 82,746$ 82,746  
Future economic benefit period10    
Discount rate   17.50%17.50%
Weighted-average increase in revenues   6.00%6.00%
Weighted-average increase in expenses   5.00%5.00%
Fair value of the wealth management reporting unit exceeding carrying value 59.70%53.60%