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Activity Related to Liability for Special Charges (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 USD ($)
Special Charges [Line Items] |
Beginning Balance | $ 11,813
Additions | 4,873
Payments | (2,854)
Foreign currency translation adjustment and other | (3)
Ending Balance | 13,829
Employee Termination Costs |
Special Charges [Line Items] |
Beginning Balance | 7,768
Additions | 4,873
Payments | (2,787)
Foreign currency translation adjustment and other | (3)
Ending Balance | 9,851
Lease Termination Costs |
Special Charges [Line Items] |
Beginning Balance | 4,045
Payments | (67)
Ending Balance | $ 3,978

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- Definition Special Charges [Line Items] + References No definition available. + Details
Name: | fcn_SpecialChargesLineItems
Namespace Prefix: | fcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Special charges on foreign currency translation adjustment and other. + References No definition available. + Details
Name: | fcn_SpecialChargesOnForeignCurrencyTranslationAdjustmentAndOther
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination and to asset retirement obligations. + References No definition available. + Details
Name: | fcn_SpecialChargesReserve
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Reserve increase representing the amount charged against earnings in the period for a specified incurred and estimated type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References No definition available. + Details
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Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of 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_SpecialChargesReserveSettledWithCash
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |