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Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Goodwill [Roll Forward] |  |
Goodwill beginning of period | $ 1,232,791,000 |
Acquisitions | 12,885,000 |
Foreign currency translation adjustment and other | (1,704,000) |
Goodwill end of period | 1,243,972,000 |
Corporate Finance & Restructuring |  |
Goodwill [Roll Forward] |  |
Goodwill beginning of period | 501,046,000 |
Acquisitions | 12,885,000 |
Foreign currency translation adjustment and other | 349,000 |
Goodwill end of period | 514,280,000 |
Accumulated impairment loss | 0 | $ 0
Forensic and Litigation Consulting |  |
Goodwill [Roll Forward] |  |
Goodwill beginning of period | 237,929,000 |
Acquisitions | 0 |
Foreign currency translation adjustment and other | (592,000) |
Goodwill end of period | 237,337,000 |
Accumulated impairment loss | 0 | 0
Economic Consulting |  |
Goodwill [Roll Forward] |  |
Goodwill beginning of period | 268,858,000 |
Acquisitions | 0 |
Foreign currency translation adjustment and other | (187,000) |
Goodwill end of period | 268,671,000 |
Accumulated impairment loss | 0 | 0
Technology |  |
Goodwill [Roll Forward] |  |
Goodwill beginning of period | 96,811,000 |
Acquisitions | 0 |
Foreign currency translation adjustment and other | (40,000) |
Goodwill end of period | 96,771,000 |
Accumulated impairment loss | 0 | 0
Strategic Communications |  |
Goodwill [Roll Forward] |  |
Goodwill beginning of period | 128,147,000 |
Acquisitions | 0 |
Foreign currency translation adjustment and other | (1,234,000) |
Goodwill end of period | 126,913,000 |
Accumulated impairment loss | (194,100,000) | (194,100,000)
Goodwill | $ 321,100,000 | $ 322,300,000

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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