Income Taxes (Reconciliation Of The Tax Provision At The Statutory U.S. Federal Income Tax Rate With) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Income Tax Disclosure [Abstract]
Tax provision at the statutory federal income tax rate	$ (6,501)	$ 11,961	$ 665
Unremitted earnings	2,786	4,281	60
Non-deductible permanent items	1,246	1,220	1,677
State and local income taxes, net of federal benefit	(268)	55	82
Current year income or losses with no tax benefit or expense recognized due to valuation allowance	9,886	(8,551)	(165)
Effect of foreign operations	35	3,143	1,041
Potential tax contingencies	(990)	(634)	160
Change in valuation allowance	448	11,297	(125)
Stock based compensation	612	316	315
Other	386	133	(39)
Total provision	$ 7,640	$ 23,221	$ 3,671