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Debt (Details Textual) - USD ($)
6 Months Ended
Oct. 09, 2014
Jun. 29, 2019
Dec. 29, 2018
Debt Instrument [Line Items]      
Unamortized discount   $ 4,348,000 $ 4,709,000
Document Period End Date   Jun. 29, 2019  
Senior Notes [Member] | Senior Notes Due 2024 [Member]      
Debt Instrument [Line Items]      
Aggregate principal amount, issued $ 350,000,000.0 $ 350,000,000 350,000,000
Stated interest rate of Senior Notes 4.375%    
Proceeds from Senior Notes, net $ 342,400,000    
Unamortized discount 1,400,000 4,348,000 $ 4,709,000
Debt issuance costs $ 6,200,000    
Fair value of notes payable   $ 372,400