Commitments and Contingencies - (Details) (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 31, 2011	Dec. 28, 2013	Dec. 29, 2012
Loss Contingencies [Line Items]
Letters of credit outstanding, amount	$ 11,600,000
Putative Class Action [Member]
Loss Contingencies [Line Items]
Cash Settlement Per Third Claim	8,000
Environmental Issue [Member]
Loss Contingencies [Line Items]
Environmental Remediation Funding		100,000
Letters of credit outstanding, amount			300,000	200,000
Accrual for Environmental Loss Contingencies, Gross	1,000,000
Legal Reserve [Member] | Putative Class Action [Member]
Loss Contingencies [Line Items]
Settlement Liabilities, Current				2,500,000
Notification Reserve [Member] | Putative Class Action [Member]
Loss Contingencies [Line Items]
Settlement Liabilities, Current				$ 600,000