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Contingencies - Additional Information (Detail) (USD $) | 9 Months Ended
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Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract] |
Minimum estimated range of aggregate loss for legal proceedings | $ 0
Maximum estimated range of aggregate loss for legal proceedings | 33,000,000
Company purchased and holds auction rate securities | 94,800,000
Amount of ARS committed to purchase from clients | 13,100,000
Eligible investor subject to future buyback potential additional losses related to valuation adjustments | 106,100,000
Period of auction rates security to be purchased from rendering of the award | 30 days
Loss Contingency Accrual | $ 19,700,000

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- Definition The total amount of ARS the firm purchased and hold. + References No definition available. + Details
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X
- Definition The amount of ARS the firm committed to purchase from clients. + References No definition available. + Details
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- Definition Eligible investor subject to future buyback potential additional losses related to valuation adjustments. + References No definition available. + Details
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- Definition Period of auction rates security to be purchased from rendering of award. + References No definition available. + Details
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- Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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