Quarterly report pursuant to Section 13 or 15(d)

Derivatives and Risk Management (Details)

v3.10.0.1
Derivatives and Risk Management (Details) - Interest Rate Cap - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 27, 2018
Sep. 28, 2017
Sep. 27, 2018
Sep. 28, 2017
Dec. 28, 2017
Cash Flow Hedging          
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  
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract]          
Gain (loss) recognition in other comprehensive income (loss), effective portion 131 $ (121) 796 $ (887)  
Designated as Hedging Instrument [Member] | Cash Flow Hedging          
Derivative [Line Items]          
Notional amount 102,500   102,500   $ 102,500
Derivative Asset, Noncurrent 1,670   1,670   710
AOCI, Net of Tax 599   599   (133)
Not Designated as Hedging Instrument [Member]          
Derivative [Line Items]          
Notional amount 102,500   102,500   102,500
Derivative Asset, Noncurrent 1,670   1,670   710
AOCI, Net of Tax $ (8)   $ (8)   $ (72)