Summary Of Significant Accounting Policies (Summary of Statements of Equity Restatement Adjustments) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014	Dec. 29, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ (2,559)	$ (129)	$ 10,953
Accumulated deficit	(14,890)		(12,331)
Total stockholders' equity	293,993		$ 327,931	$ 346,325
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	(745)
Accumulated deficit	(13,076)
Total stockholders' equity	295,807
Restatement Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	(1,814)
Accumulated deficit	(1,814)
Total stockholders' equity	$ (1,814)