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Special Charges - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012 Employee Location
Special Charges [Line Items] |  |
Special charges | $ 427,000 | $ 29,600,000
Non cash special charges |  | 5,000,000
Number of employees terminated |  | 116
Number of office locations |  | 9
Cash outflow associated with special charges, amount paid | 24,900,000 |
Cash outflow associated with special charges, amount paid | 10,900,000 |
Cash outflow associated with special charges, amount expected to be paid in 2013 | 5,600,000 |
Cash outflow associated with special charges, amount expected to be paid in 2014 | 2,700,000 |
Cash outflow associated with special charges, amount expected to be paid in 2015 | 1,200,000 |
Cash outflow associated with special charges, amount expected to be paid in 2016 | 800,000 |
Cash outflow associated with special charges, amount expected to be paid from 2017 to 2025 | $ 3,700,000 |

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- Definition Amounts paid as of the current balance sheet date related to the current period special charges. + References No definition available. + Details
Name: | fcn_CurrentPeriodSpecialChargesAmountPaid
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Expected Cash Outflow From Special Charges From Year Four To Year Twelve + References No definition available. + Details
Name: | fcn_ExpectedCashOutflowFromSpecialChargesFromYearFourToYearTwelve
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Cash outflows expected to be paid during the remainder of the fiscal year related to the special charges recorded in the period. + References No definition available. + Details
Name: | fcn_ExpectedCashOutflowFromSpecialChargesRemainderOfFiscalYear
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Cash outflows expected to be paid during the fiscal year following this fiscal year related to the special charges recorded in the period. + References No definition available. + Details
Name: | fcn_ExpectedCashOutflowFromSpecialChargesYearOne
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Cash outflows expected to be paid during the third fiscal year following this fiscal year related to the special charges recorded in the period. + References No definition available. + Details
Name: | fcn_ExpectedCashOutflowFromSpecialChargesYearThree
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cash outflows expected to be paid during the second fiscal year following this fiscal year related to the special charges recorded in the period. + References No definition available. + Details
Name: | fcn_ExpectedCashOutflowFromSpecialChargesYearTwo
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The number of consolidated office locations related to the special charges recorded in the period. + References No definition available. + Details
Name: | fcn_NumberOfConsolidatingOfficeLocations
Namespace Prefix: | fcn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Employees Affected By Involuntary Termination + References No definition available. + Details
Name: | fcn_NumberOfEmployeesAffectedByInvoluntaryTermination
Namespace Prefix: | fcn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The charge against earnings in the period, comprised of costs associated with non-recurring activities related to our global branding strategy and other strategic branding decisions, a realignment of our workforce and consolidation of office locations. + References No definition available. + Details
Name: | fcn_SpecialChargesAmount
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | fcn_SpecialChargesLineItems
Namespace Prefix: | fcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of consideration other than cash paid in the period to fully or partially settle a specified, previously accrued type of special charge. + References No definition available. + Details
Name: | fcn_SpecialChargesReserveSettledWithoutCash
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Total cash outflows expected to be paid related to the special charges recorded in the current period. + References No definition available. + Details
Name: | fcn_TotalExpectedCashOutflowFromCurrentPeriodSpecialCharges
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration