Income Taxes Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016		Jan. 02, 2016		Jan. 03, 2015		Dec. 28, 2013
Income Tax Contingency [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 21,875		$ 22,929
Valuation Allowances and Reserves, Balance	6,024		6,209		$ 6,807		$ 3,884
Valuation Allowances and Reserves, Recoveries	0		143	[1]	2,923	[1]
Valuation Allowances and Reserves, Deductions	(185)	[2]	$ (741)		$ 0	[2]
CANADA
Income Tax Contingency [Line Items]
Valuation Allowances and Reserves, Adjustments	1,400
CA EZ tax credits [Member]
Income Tax Contingency [Line Items]
Valuation Allowances and Reserves, Adjustments	$ 4,100

[1] Represents additional valuation allowance against California enterprise zone tax credits for deferred tax allowance of $1.1 million plus additional valuation allowance against Canadian deferred tax assets of $0.8 million.

[2] Represents reduction of state valuation allowance against tax credits.