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Employee Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	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

X

- Details

Name:	fcn_EmployeeBenefitPlansLineItems
Namespace Prefix:	fcn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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