Debt (Schedule of Deferred Financing Fees) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016
Deferred Finance Costs [Roll Forward]
Total, Beginning Balance	$ (40,837)
Amortization during the period	(3,437)	$ (1,773)
Total, Beginning Balance	39,437
Loss on extinguishment of debt	1,600
Revolving Credit Facility [Member]
Deferred Finance Costs [Roll Forward]
Deferred Finance Costs, Net, Beginning Balance	3,800
Amortization during the period	(248)
Deferred Finance Costs, Net, Ending Balance	3,552
Term Loan And Senior Notes [Member]
Deferred Finance Costs [Roll Forward]
Deferred Finance Costs, Net, Beginning Balance	32,096
Financing costs deferred	1,789
Write-off of debt issuance costs and unamortized discount	(1,051)
Amortization during the period	(1,299)
Deferred Finance Costs, Net, Ending Balance	31,535
Total, Beginning Balance	(40,837)
Financing costs incurred	1,789
Write-off of debt issuance costs and unamortized discount	(1,559)
Amortization during the period	(1,630)
Total, Beginning Balance	39,437
Term Loan B (TLB) Facility [Member]
Deferred Finance Costs [Roll Forward]
Unamortized Discount on TLB Facility, Beginning Balance	8,741
Financing costs incurred	0
Write-off of debt issuance costs and unamortized discount	(508)
Amortization during the period	(331)
Unamortized Discount on TLB Facility, Ending Balance	$ 7,902