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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Summary of Changes in Carrying Amounts of Goodwill by Operating Segment | The table below summarizes the changes in the carrying amount of goodwill by reportable segment:
|  | Corporate |  |  | Forensic and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Finance & |  |  | Litigation |  |  | Economic |  |  |  |  |  |  | Strategic |  |  |  |  |
|  | Restructuring |  |  | Consulting |  |  | Consulting |  |  | Technology |  |  | Communications |  |  | Total |
Balance at December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 440,666 |  |  | $ | 230,544 |  |  | $ | 268,209 |  |  | $ | 117,607 |  |  | $ | 317,114 |  |  | $ | 1,374,140 |
Accumulated goodwill impairment |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (194,139 | ) |  |  | (194,139 | )
Goodwill, net at December 31, 2016 |  |  | 440,666 |  |  |  | 230,544 |  |  |  | 268,209 |  |  |  | 117,607 |  |  |  | 122,975 |  |  |  | 1,180,001 |
Foreign currency translation adjustment and other |  |  | 1,593 |  |  |  | 503 |  |  |  | 104 |  |  |  | 17 |  |  |  | 1,409 |  |  |  | 3,626 |
Goodwill |  |  | 440,666 |  |  |  | 230,544 |  |  |  | 268,209 |  |  |  | 117,607 |  |  |  | 317,114 |  |  |  | 1,374,140 |
Accumulated goodwill impairment |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (194,139 | ) |  |  | (194,139 | )
Goodwill, net at March 31, 2017 |  | $ | 442,259 |  |  | $ | 231,047 |  |  | $ | 268,313 |  |  | $ | 117,624 |  |  | $ | 124,384 |  |  | $ | 1,183,627 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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