Segment Information - Reported Revenue and Profit Before Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015		Sep. 30, 2016	Sep. 30, 2015
Revenue
Revenue		$ 211,804	$ 207,478	[1]	$ 638,834	$ 672,612	[1]
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes		(1,810)	(2,573)	[1]	(14,396)	2,140	[1]
Private Client Division [Member]
Revenue
Revenue	[2]	127,835	122,324		376,737	396,039
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes	[2]	$ 20,137	$ 14,905		$ 50,799	$ 45,064
Asset management fees		77.50%	77.50%		77.50%	77.50%
Asset Management [Member]
Revenue
Revenue	[2]	$ 23,234	$ 23,849		$ 68,978	$ 73,654
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes	[2]	$ 9,380	$ 7,563		$ 21,851	$ 23,250
Asset management fees		22.50%	22.50%		22.50%	22.50%
Capital Markets [Member]
Revenue
Revenue		$ 60,703	$ 60,585		$ 187,292	$ 202,282
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes		(1,103)	(2,016)		(3,856)	8,342
Corporate and Other [Member]
Revenue
Revenue		32	720		5,827	637
Income (loss) before income taxes from continuing operations
Total income (loss) before income taxes		$ (30,224)	$ (23,025)		$ (83,190)	$ (74,516)

[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.