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Special Charges By Segment (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Special Charges [Line Items] |  |  |  |  |  |
Special charges | $ 1,628,000 | $ 5,347,000 | $ 9,364,000 | $ 0 | $ 16,339,000 | $ 38,414,000
Operating Segments |  |  |  |  |  |
Special Charges [Line Items] |  |  |  |  |  |
Special charges |  |  |  |  | 426,000 | 12,478,000
Operating Segments | Corporate Finance & Restructuring |  |  |  |  |  |
Special Charges [Line Items] |  |  |  |  |  |
Special charges |  |  |  |  | 84,000 | 10,274,000
Operating Segments | Forensic and Litigation Consulting |  |  |  |  |  |
Special Charges [Line Items] |  |  |  |  |  |
Special charges |  |  |  |  | 308,000 | 2,111,000
Operating Segments | Economic Consulting |  |  |  |  |  |
Special Charges [Line Items] |  |  |  |  |  |
Special charges |  |  |  |  | 12,000 | 11,000
Operating Segments | Technology |  |  |  |  |  |
Special Charges [Line Items] |  |  |  |  |  |
Special charges |  |  |  |  | 19,000 | 16,000
Operating Segments | Strategic Communications |  |  |  |  |  |
Special Charges [Line Items] |  |  |  |  |  |
Special charges |  |  |  |  | 3,000 | 66,000
Unallocated Corporate |  |  |  |  |  |
Special Charges [Line Items] |  |  |  |  |  |
Special charges |  |  |  |  | $ 15,913,000 | $ 25,936,000

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- Definition The charge against earnings in the period, comprised of costs associated with non-recurring activities related to our global branding strategy and other strategic branding decisions, a realignment of our workforce and consolidation of office locations. + References No definition available. + Details
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