Discontinued Operations (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Discontinued Operations
Income/(loss) from discontinued operations, net of taxes	$ 33,000	$ (5,357,000)	$ 41,000	$ (18,425,000)
Equities division
Discontinued Operations
Net revenues	11,000	2,595,000	54,000	12,794,000
Total expenses	(22,000)	11,395,000	(125,000)	38,802,000
Income/(loss) from discontinued operations before income taxes	33,000	(8,800,000)	179,000	(26,008,000)
Income tax (benefit)/expense		(3,443,000)	138,000	(7,583,000)
Income/(loss) from discontinued operations, net of taxes	33,000	(5,357,000)	41,000	(18,425,000)
Goodwill and intangible impairment charge				14,300,000
Restructuring expense		$ 7,300,000	$ (322,000)