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Non-operating Income - (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Nonoperating Income (Expense) [Abstract]      
Interest income $ 5,534 $ 13,917 $ 8,178
Realized and unrealized foreign currency gain (loss) 2,631 (627) (2,027)
Interest expense (338) (328) (706)
Other (86) 12 (287)
Non-operating income $ 7,913 $ 12,950 $ 5,732