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v3.3.1.900

Forgivable Loans (Details) $ in Thousands | 12 Months Ended
--- | ---
Jan. 02, 2016 USD ($) | Jan. 03, 2015 USD ($)
Interest rate (as a percent) | 0.0325 |
Forgivable loans activity |  |
Beginning balance | $ 45,356 | $ 54,759
Forgivable loans to employees | 14,531 | 5,964
Terminations |  | (2,158)
Amortization | (15,202) | (13,209)
Ending balance | 44,685 | 45,356
Current portion of forgivable loans | 4,402 | 2,449
Non-current portion of forgivable loans | $ 40,283 | $ 42,907
Minimum |  |
Term of forgivable loans or advances | 3 years |
Maximum |  |
Term of forgivable loans or advances | 8 years |

X
- Definition Represents the term of forgivable loans or advances issuable to employees and non-employee experts. + References No definition available. + Details
Name: | crai_ForgivableLoanAdvancesTermToEmployeesAndNonEmployeeExperts
Namespace Prefix: | crai_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents information pertaining to forgivable loans provided as on the balance sheet date. + References No definition available. + Details
Name: | crai_ForgivableLoans
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | crai_ForgivableLoansActivityAbstract
Namespace Prefix: | crai_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of forgivable loans or advances to employees and non-employee experts for future service. + References No definition available. + Details
Name: | crai_ForgivableLoansAdvancesToEmployeesAndNonEmployee
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents information pertaining to amortizations on forgivable loans during the period. + References No definition available. + Details
Name: | crai_ForgivableLoansAmortization
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amounts due on short-term loans forgivable on the balance sheet date. + References No definition available. + Details
Name: | crai_ForgivableLoansCurrent
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents information pertaining to interest rates charged on outstanding forgivable loans. + References No definition available. + Details
Name: | crai_ForgivableLoansInterestRate
Namespace Prefix: | crai_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amounts due on long-term loans forgivable on the balance sheet date. + References No definition available. + Details
Name: | crai_ForgivableLoansNoncurrent
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents information pertaining to terminations of forgivable loans during the period. + References No definition available. + Details
Name: | crai_ForgivableLoansTerminations
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |