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Assets By Segments (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]    
Total assets $ 2,364,947 $ 2,275,452
Operating Segments
    
Segment Reporting Information [Line Items]    
Total assets 2,077,922 2,074,622
Operating Segments | Corporate Finance / Restructuring
    
Segment Reporting Information [Line Items]    
Total assets 669,027 653,998
Operating Segments | Forensic and Litigation Consulting
    
Segment Reporting Information [Line Items]    
Total assets 444,850 397,879
Operating Segments | Economic Consulting
    
Segment Reporting Information [Line Items]    
Total assets 487,549 477,430
Operating Segments | Technology
    
Segment Reporting Information [Line Items]    
Total assets 208,612 203,117
Operating Segments | Strategic Communications
    
Segment Reporting Information [Line Items]    
Total assets 267,884 342,198
Unallocated Corporate Assets
    
Segment Reporting Information [Line Items]    
Total assets $ 287,025 $ 200,830