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Leases (Tables)
 12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Schedule of lease expenses and lease terms for operating leases
The components of CRA's lease expenses, which are included in the consolidated statements of operations, are as follows (in thousands):
Year EndedYear EndedYear Ended
December 31,
2022
(52 weeks)
January 1,
2022
(52 weeks)
January 2,
2021
(53 weeks)
Operating lease cost$18,494 $18,293 $17,803 
Short-term lease cost285 442 908 
Variable lease cost5,986 5,273 6,155 
Total lease cost$24,765 $24,008 $24,866 
The following table presents summary information for CRA's lease terms and discount rates for its operating leases:
December 31,
2022		January 1,
2022		January 2,
2021
Weighted average remaining lease term—operating leases6.7 years7.7 years8.6 years
Weighted average discount rate—operating leases3.6 %3.6 %3.6 %
Schedule of maturities of lease liabilities related to office space and equipment
At December 31, 2022, CRA had the following maturities of lease liabilities related to office space, all of which are under non-cancellable operating leases (in thousands):
Fiscal YearOperating Lease
Commitments
2023$19,804 
202421,632 
202521,244 
202620,050 
202720,333 
Thereafter35,591 
Total lease payments138,654 
Less: imputed interest(16,674)
Total$121,980