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Segment Information - Reported Revenue and Profit Before Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenue |  |  |
Total Revenue | $ 952,612 | $ 958,992 | $ 1,036,273
Profit (loss) before income taxes |  |  |
Total, profit before income taxes | (527) | 17,848 | 67,991
Asset Management [Member] |  |  |
Revenue |  |  |
Total Revenue | 92,941 | 73,963 | 72,780
Profit (loss) before income taxes |  |  |
Total, profit before income taxes | 25,793 | 15,392 | 20,171
Private Client [Member] |  |  |
Revenue |  |  |
Total Revenue | 547,583 | 538,441 | 572,590
Profit (loss) before income taxes |  |  |
Total, profit before income taxes | 25,014 | 18,196 | 27,953
Capital Markets [Member] |  |  |
Revenue |  |  |
Total Revenue | 312,088 | 346,588 | 390,903
Profit (loss) before income taxes |  |  |
Total, profit before income taxes | $ (51,334) | $ (15,740) | $ 19,867

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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 + Details
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- Definition Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph a, b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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