Segment Information - Reported Revenue and Profit Before Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue
Total revenue		$ 238,928	$ 249,689	$ 484,489	$ 504,857
Income (loss) before income taxes
Total income (loss) before income taxes		2,630	136	12,481	5,245
Private Client Division [Member]
Revenue
Total revenue	[1]	133,783	145,344	273,715	293,164
Income (loss) before income taxes
Total income (loss) before income taxes	[1]	13,402	7,560	$ 30,159	$ 17,868
Asset management fees				77.50%	77.50%
Asset Management [Member]
Revenue
Total revenue	[1]	25,344	25,032	$ 49,805	$ 49,642
Income (loss) before income taxes
Total income (loss) before income taxes	[1]	7,801	8,353	$ 15,687	$ 16,036
Asset management fees				22.50%	22.50%
Capital Markets [Member]
Revenue
Total revenue		69,531	72,217	$ 141,697	$ 150,098
Income (loss) before income taxes
Total income (loss) before income taxes		3,623	7,082	10,358	18,266
Commercial Mortgage Banking [Member]
Revenue
Total revenue		10,969	6,958	19,355	11,830
Income (loss) before income taxes
Total income (loss) before income taxes		3,731	3,605	7,768	5,454
Corporate and Other [Member]
Revenue
Total revenue		(699)	138	(83)	123
Income (loss) before income taxes
Total income (loss) before income taxes		$ (25,927)	$ (26,464)	$ (51,491)	$ (52,379)

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