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

Derivatives and Risk Management (Details)

v3.8.0.1
Derivatives and Risk Management (Details) - Cash Flow Hedging - 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
Interest Rate Swap              
Derivative Instruments, Gain (Loss) [Line Items]              
Notional amount         $ 17,500 $ 35,000  
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]              
Gain (loss) reclassified from AOCI to earnings, effective Portion $ 0 $ 0 $ 0 $ 0 0 0 $ 0
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract]              
Gain (loss) recognition in other comprehensive loss, effective portion 0 44 0 67 100 43 14
Interest Rate Swap | Other Noncurrent Assets              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivative Asset, Noncurrent         0 0  
Interest Rate Cap              
Derivative Instruments, Gain (Loss) [Line Items]              
Notional amount 205,000   205,000   205,000    
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]              
Gain (loss) reclassified from AOCI to earnings, effective Portion 0 0 0 0 0 0 0
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract]              
Gain (loss) recognition in other comprehensive loss, effective portion (121) $ 0 (887) $ 0 176 $ 0 $ 0
Interest Rate Cap | Other Noncurrent Assets              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivative Asset, Noncurrent $ 1,021   $ 1,021   $ 2,473