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) - 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
Derivative Instruments, Gain (Loss) [Line Items]              
AOCI, Net of tax $ (711)   $ (711)   $ 176 $ (100)  
Interest Rate Swap | Cash Flow Hedging              
Derivative Instruments, Gain (Loss) [Line Items]              
Notional amount         17,500 35,000  
AOCI, Net of tax         0 (100)  
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 | Cash Flow Hedging | Other Noncurrent Assets              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivative Asset, Noncurrent         0 0  
Interest Rate Swap | Cash Flow Hedging | Other Noncurrent Liabilities              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivative Liability, Noncurrent         0 (160)  
Interest Rate Cap | Cash Flow Hedging              
Derivative Instruments, Gain (Loss) [Line Items]              
Notional amount 205,000   205,000   205,000    
AOCI, Net of tax         176    
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 | Cash Flow Hedging | Other Noncurrent Assets              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivative Asset, Noncurrent $ 1,021   $ 1,021   2,473    
Interest Rate Cap | Cash Flow Hedging | Other Noncurrent Liabilities              
Derivative Instruments, Gain (Loss) [Line Items]              
Derivative Liability, Noncurrent         $ 0