Segment Information - Reported Revenue and Profit Before Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015
Revenue
Revenue		$ 212,074	$ 227,959	[1]	$ 427,030	$ 465,134	[1]
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes		(5,246)	(1,101)	[1]	(12,586)	4,713	[1]
Private Client Division [Member]
Revenue
Revenue	[2]	121,358	133,783		248,902	273,715
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes	[2]	14,345	13,402		$ 30,662	$ 30,159
Asset management fees					77.50%	77.50%
Asset Management [Member]
Revenue
Revenue	[2]	22,770	25,344		$ 45,744	$ 49,805
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes	[2]	5,703	7,801		$ 12,471	$ 15,687
Asset management fees					22.50%	22.50%
Capital Markets [Member]
Revenue
Revenue		65,524	69,531		$ 126,589	$ 141,697
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes		4,045	3,623		(2,753)	10,358
Corporate and Other [Member]
Revenue
Revenue		2,422	(699)		5,795	(83)
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes		$ (29,339)	$ (25,927)		$ (52,966)	$ (51,491)

[1] Amounts have been recast to reflect discontinued operations. See Note 3 for details.

[2] Asset management fees are allocated 22.5% to the Asset Management and 77.5% to the Private Client segments.