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Fair Value of Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 29, 2020
Mar. 31, 2019
Dec. 29, 2019
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]      
Redeemable period 45 days    
Minimum      
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]      
Redeemable period 30 days    
Maximum      
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]      
Redeemable period 90 days    
Fair Value, Recurring      
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]      
Fair value of investments $ 24,804 $ 24,188 $ 25,518
Net gains to other (income) expense, net $ (431) $ 550