XML 37 R71.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Subsequent Event (Details) (Subsequent event., B P Hancock) | 0 Months Ended |
--- | --- | ---
Feb. 24, 2015 | Feb. 24, 2015 sqft
Subsequent event. | B P Hancock |  |
Subsequent Event |  |
Additional lease area | 10,057 crai_OperatingLeasesAdditionalAreaTakenOnLease / us-gaap_CounterpartyNameAxis = crai_BPHancockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 10,057 crai_OperatingLeasesAdditionalAreaTakenOnLease / us-gaap_CounterpartyNameAxis = crai_BPHancockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Annual rate (in dollars per sq. ft.) | 49 crai_OperatingLeasesAnnualRate / us-gaap_CounterpartyNameAxis = crai_BPHancockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 49 crai_OperatingLeasesAnnualRate / us-gaap_CounterpartyNameAxis = crai_BPHancockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Lease extension term | 3 years |

X
- Definition Represents the additional lease area to be taken by the entity. + References No definition available. + Details
Name: | crai_OperatingLeasesAdditionalAreaTakenOnLease
Namespace Prefix: | crai_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the annual rate excluding customary operating costs and expenses to be incurred per unit by the entity. + References No definition available. + Details
Name: | crai_OperatingLeasesAnnualRate
Namespace Prefix: | crai_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of the lessee's leasing arrangement renewal, 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_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration