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Segment Information - Reported Revenue and Profit Before Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue
Total revenue	$ 293,362	$ 243,376	$ 243,830	$ 239,146	$ 249,415	$ 231,838	$ 233,145	$ 238,214	$ 1,019,714	$ 952,612	$ 958,992
Income (loss) before income taxes
Total income (loss) before income taxes	23,359	8,163	5,674	6,713	(7,135)	5,258	7,839	(6,489)	43,909	(527)	17,848
Private Client Division [Member]
Revenue
Total revenue									600,071	550,797	541,365
Income (loss) before income taxes
Total income (loss) before income taxes									65,924	53,487	59,070
Asset management fees									77.50%	77.50%	77.50%
Asset Management [Member]
Revenue
Total revenue									102,214	84,160	71,052
Income (loss) before income taxes
Total income (loss) before income taxes									40,951	25,436	20,759
Asset management fees									22.50%	22.50%	22.50%
Capital Markets [Member]
Revenue
Total revenue									281,377	283,139	322,147
Income (loss) before income taxes
Total income (loss) before income taxes									6,968	(15,324)	12,996
Commercial Mortgage Banking [Member]
Revenue
Total revenue									34,144	35,682	28,923
Income (loss) before income taxes
Total income (loss) before income taxes									11,413	15,267	11,428
Corporate/Other [Member]
Revenue
Total revenue									1,908	(1,166)	(4,495)
Income (loss) before income taxes
Total income (loss) before income taxes									$ (81,347)	$ (79,393)	$ (86,405)

X

- Definition

Revenue allocation percentage.

+ References

No definition available.

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 5

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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