General form of registration statement for all companies including face-amount certificate companies

Debt (Details)

v3.8.0.1
Debt (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 28, 2017
Sep. 29, 2016
Sep. 28, 2017
Sep. 29, 2016
Dec. 29, 2016
Dec. 31, 2015
Dec. 25, 2014
Debt Instrument [Line Items]              
Loss on extinguishment of debt $ 0 $ 0 $ 5,442 $ 153 $ 1,813 $ 0 $ 0
Total debt at par value 191,475   191,475   400,000 179,233  
Less: unamortized discount and debt issuance costs 4,056   4,056   9,257 1,643  
Net carrying amount 187,419   187,419   390,743 177,590  
Level 3              
Debt Instrument [Line Items]              
Fair value $ 191,858   $ 191,858   $ 400,000 $ 179,413