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Fair Value Measurements (Tables)
12 Months Ended
Dec. 27, 2020
Fair Value Disclosures [Abstract]  
Schedule of fair value assets measured on recurring basis
The following tables present the Company's assets measured at fair value on a recurring basis as of December 27, 2020 and December 29, 2019 (in thousands):
December 27, 2020Level 1Level 2Level 3
Assets:    
Investments in rabbi trust$6,740 $6,740 $— $— 
Total assets measured at fair value$6,740 $6,740 $— $— 
December 29, 2019Level 1Level 2Level 3
Assets:
Investments in rabbi trust$7,337 $7,337 $— $— 
Total assets measured at fair value$7,337 $7,337 $— $—