Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information Condensed Consolidating Balance Sheet Information (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Assets        
Cash and cash equivalents $ 225,295 $ 283,680 $ 77,005 $ 205,833
Accounts receivable, net 513,285 485,101    
Other current assets 109,354 115,392    
Total current assets 847,934 884,173    
Property and equipment, net 79,389 82,163    
Goodwill 1,201,652 1,211,689    
Other intangible assets, net 72,264 77,034    
Other assets 170,130 175,468    
Total assets 2,371,369 2,430,527    
Liabilities        
Other current liabilities 291,155 367,092    
Total current liabilities 291,155 367,092    
Long-term debt, net 700,000 700,000    
Other liabilities 262,960 260,689    
Total liabilities 1,254,115 1,327,781    
Stockholders' equity 1,117,254 1,102,746    
Total liabilities and stockholders' equity 2,371,369 2,430,527    
FTI Consulting, Inc.        
Assets        
Cash and cash equivalents 135,170 171,090 23,393 111,943
Accounts receivable, net 171,301 153,495    
Other current assets 71,707 74,455    
Total current assets 378,178 399,040    
Property and equipment, net 34,856 33,864    
Goodwill 558,978 559,318    
Other intangible assets, net 28,820 29,807    
Investments in subsidiaries 1,921,809 1,915,869    
Other assets 49,359 61,025    
Total assets 2,972,000 2,998,923    
Liabilities        
Intercompany payables 823,998 832,253    
Other current liabilities 114,565 148,299    
Total current liabilities 938,563 980,552    
Long-term debt, net 700,000 700,000    
Other liabilities 216,183 215,625    
Total liabilities 1,854,746 1,896,177    
Stockholders' equity 1,117,254 1,102,746    
Total liabilities and stockholders' equity 2,972,000 2,998,923    
Guarantor Subsidiaries        
Assets        
Cash and cash equivalents 156 159 155 494
Accounts receivable, net 169,641 162,032    
Intercompany receivables 863,105 875,000    
Other current assets 20,883 22,994    
Total current assets 1,053,785 1,060,185    
Property and equipment, net 15,460 17,050    
Goodwill 416,053 416,053    
Other intangible assets, net 17,717 18,432    
Investments in subsidiaries 473,695 484,162    
Other assets 75,478 78,388    
Total assets 2,052,188 2,074,270    
Liabilities        
Intercompany payables 11,004 14,197    
Other current liabilities 94,367 113,450    
Total current liabilities 105,371 127,647    
Other liabilities 10,833 14,955    
Total liabilities 116,204 142,602    
Stockholders' equity 1,935,984 1,931,668    
Total liabilities and stockholders' equity 2,052,188 2,074,270    
Non-Guarantor Subsidiaries        
Assets        
Cash and cash equivalents 89,969 112,431 53,457 93,396
Accounts receivable, net 172,343 169,574    
Intercompany receivables   12,195    
Other current assets 16,764 17,943    
Total current assets 279,076 312,143    
Property and equipment, net 29,073 31,249    
Goodwill 226,621 236,318    
Other intangible assets, net 49,418 53,357    
Other assets 45,293 36,055    
Total assets 629,481 669,122    
Liabilities        
Intercompany payables 28,103 40,745    
Other current liabilities 82,223 105,343    
Total current liabilities 110,326 146,088    
Other liabilities 35,944 30,109    
Total liabilities 146,270 176,197    
Stockholders' equity 483,211 492,925    
Total liabilities and stockholders' equity 629,481 669,122    
Eliminations        
Assets        
Intercompany receivables (863,105) (887,195)    
Total current assets (863,105) (887,195)    
Other intangible assets, net (23,691) (24,562)    
Investments in subsidiaries (2,395,504) (2,400,031)    
Total assets (3,282,300) (3,311,788)    
Liabilities        
Intercompany payables (863,105) (887,195)    
Total current liabilities (863,105) (887,195)    
Total liabilities (863,105) (887,195)    
Stockholders' equity (2,419,195) (2,424,593)    
Total liabilities and stockholders' equity $ (3,282,300) $ (3,311,788)