Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Nov. 30, 2011

Goodwill and Other Intangible Assets [Abstract]

Summary of goodwill

	Twelve Months Ended November 30, 2011			Eleven Months Ended November 30, 2010
Balance, at beginning of period	$	364,964		$	364,795
Add: Contingent consideration		825			1,013
Add: Translation adjustments		(215	)		(844	)
Balance, at end of period	$	365,574		$	364,964

Intangible Assets

	November 30, 2011
	Gross cost		Accumulated amortization			Net carrying amount		Weighted average remaining lives (years)
Exchange and clearing organization membership interests and registrations	$	11,219	$	—		$	11,219		N/A
Customer relationships		10,542		(2,776	)		7,766		6.9
Trade name		1,300		(361	)		939		1.1
Other		100		(8	)		92		13.8
	$	23,161	$	(3,145	)	$	20,016
	November 30, 2010
	Gross cost		Accumulated amortization			Net carrying amount		Weighted average remaining lives (years)
Customer relationships	$	4,742	$	(1,726	)	$	3,016		4.2
Other		100		(2	)		98		14.8
	$	4,842	$	(1,728	)	$	3,114

Future amortization expense related to intangible assets

Fiscal year	Estimated future amortization expense
2012	$	2,203
2013		1,243
2014		853
2015		695
2016		695

Mortgage servicing rights

	Twelve Months Ended November 30, 2011			Eleven Months Ended November 30, 2010
Balance, beginning of period	$	8,263		$	8,500
Add: Acquisition		347			87
Less: Amortization		(408	)		(324	)
Balance, end of period	$	8,202		$	8,263