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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Income Tax [Line Items] |  |
Undistributed non-U.S. subsidiary earnings | $ 31,200,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries |
Undistributed earnings subject to U.S. federal income tax | 10,900,000 us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries |
Valuation allowance | 14,442,000 us-gaap_DeferredTaxAssetsValuationAllowance | 10,201,000 us-gaap_DeferredTaxAssetsValuationAllowance
Deferred tax liability not recognized related to tax basis difference in investment in foreign subsidiaries | 1,500,000 fcn_DeferredTaxLiabilitiesBasisDifferenceInSubsidiaries |
Liability for uncertain tax positions | 2,800,000 us-gaap_LiabilityForUncertainTaxPositionsNoncurrent | 2,900,000 us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Reversal of liability for uncertain tax positions | (1,200,000)fcn_IncreaseDecreaseInLiabilityForUncertainTaxPositions |
Unrecognized tax benefits | $ 1,700,000 us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions |
Minimum |  |
Income Tax [Line Items] |  |
Operating loss carryforward period | 20 |
Maximum |  |
Income Tax [Line Items] |  |
Operating loss carryforward period | Indefinite |

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