Summary Of Significant Accounting Policies (Summary of Balance Sheet Restatement Adjustments) (Details) - USD ($) $ in Thousands	Jun. 28, 2015	Dec. 28, 2014	Dec. 29, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other current assets	$ 17,867	$ 25,928
Total current assets	324,410	390,602
Total assets	656,308	738,666
Other current liabilities	16,174	17,504
Total current liabilities	129,117	158,051
Deferred income taxes	14,541	15,369
Accumulated deficit	(24,382)	(12,331)
Total stockholders' equity	288,167	327,931	$ 346,325
Total liabilities and stockholders' equity	656,308	$ 738,666
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other current assets	24,733
Total current assets	331,276
Total assets	663,174
Other current liabilities	16,519
Total current liabilities	129,462
Deferred income taxes	15,163
Accumulated deficit	(18,483)
Total stockholders' equity	294,066
Total liabilities and stockholders' equity	663,174
Restatement Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other current assets	(6,866)
Total current assets	(6,866)
Total assets	(6,866)
Other current liabilities	(345)
Total current liabilities	(345)
Deferred income taxes	(622)
Accumulated deficit	(5,899)
Total stockholders' equity	(5,899)
Total liabilities and stockholders' equity	$ (6,866)