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Fair Value of Financial Instruments - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 29, 2019
USD ($)
investment
Dec. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Number of investments | investment 3    
Fair value of available for sale investments, fair value option $ 25,518 $ 23,913  
Gain on available for sale investments, fair value option $ 1,903 $ (180) $ 1,500
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period 45 days    
Minimum      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period 30 days    
Maximum      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period 90 days