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Employee Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Domestic Employees |  |  |
Employee Benefit Plans [Line Items] |  |  |
Employer contributions to plan | $ 9.2 | $ 8.8 | $ 8.3
Foreign Employees |  |  |
Employee Benefit Plans [Line Items] |  |  |
Employer contributions to plan | $ 5.3 | $ 6.2 | $ 5.8

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- Details
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Namespace Prefix: | fcn_
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Period Type: | duration

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration