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Leases (Tables)
 12 Months Ended
Dec. 30, 2023
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 30,
2023
(52 weeks)
December 31,
2022
(52 weeks)
January 1,
2022
(52 weeks)
Operating lease cost$18,783 $18,494 $18,293 
Short-term lease cost371 285 442 
Variable lease cost6,960 5,986 5,273 
Total lease cost$26,114 $24,765 $24,008 
The following table presents summary information for CRA's lease terms and discount rates for its operating leases:
December 30,
2023		December 31,
2022		January 1,
2022
Weighted average remaining lease term—operating leases5.8 years6.7 years7.7 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 30, 2023, 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
2024$19,865 
202522,049 
202621,083 
202721,184 
202815,237 
Thereafter22,372 
Total lease payments121,790 
Less: imputed interest(13,035)
Total$108,755