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v2.4.1.9

Revenues Based on Location of Legal Entity (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 425,158 us-gaap_Revenues | $ 451,178 us-gaap_Revenues | $ 454,324 us-gaap_Revenues | $ 425,552 us-gaap_Revenues | $ 415,998 us-gaap_Revenues | $ 414,643 us-gaap_Revenues | $ 414,613 us-gaap_Revenues | $ 407,178 us-gaap_Revenues | $ 1,756,212 us-gaap_Revenues | $ 1,652,432 us-gaap_Revenues | $ 1,576,871 us-gaap_Revenues
UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,256,046 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 1,208,978 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 1,171,805 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US
UNITED KINGDOM |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 232,281 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_GB | 194,614 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_GB | 179,643 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_GB
All Other Foreign Countries |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 267,885 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = fcn_AllForeignCountriesMember | $ 248,840 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = fcn_AllForeignCountriesMember | $ 225,423 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = fcn_AllForeignCountriesMember

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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