Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

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