XML 98 R83.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stockholders' Equity - Additional Information (Detail) - USD ($) | Nov. 05, 2015 | Dec. 31, 2017 | Dec. 01, 2017 | May 18, 2017 | Jun. 02, 2016
--- | --- | --- | --- | --- | ---
2016 Stock Repurchase Program |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |
Share repurchase program authorized amount |  |  | $ 300,000,000 |  | $ 100,000,000
Stock repurchase program additional amount authorized |  |  | $ 100,000,000.0 | $ 100,000,000 |
Available amount under repurchase program |  | $ 113,300,000 |  |  |
2015 Stock Repurchase Program |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |
Share repurchase program authorized amount | $ 50,000,000 |  |  |  |
Stock repurchase program, period | 6 months |  |  |  |
Stock repurchase program expiration date | May 05, 2016 |  |  |  |

X
- Definition Stock repurchase program additional authorized amount. + References No definition available. + Details
Name: | fcn_StockRepurchaseProgramAdditionalAuthorizedAmount
Namespace Prefix: | fcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Stockholders Equity [Line Items] + References No definition available. + Details
Name: | fcn_StockholdersEquityLineItems
Namespace Prefix: | fcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Expiration date for the purchase of an entity's own shares under a stock repurchase plan, in the CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramExpirationDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramPeriodInForce1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=fcn_TwoThousandSixteenStockRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=fcn_TwoThousandFifteenStockRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |