Note 13 - Taxes on Income (Details) - Net Deferred Tax Asset - USD ($) $ in Thousands	Jan. 03, 2016	Dec. 28, 2014
Net Deferred Tax Asset [Abstract]
Basis differences of property and equipment	$ 0	$ 0
Basis differences of property and equipment	16,254	15,958
Basis difference of intangible assets	0	0
Basis difference of intangible assets	368	384
Foreign currency	0	0
Foreign currency	5,375	3,848
Net operating loss carryforwards	5,575	28,463
Net operating loss carryforwards	0	0
Valuation allowances on net operating loss carryforwards	(4,457)	(10,298)
Valuation allowances on net operating loss carryforwards	0	0
Federal tax credits	4,580	2,751
Federal tax credits	0	0
Deferred compensation	26,352	21,190
Deferred compensation	0	0
Basis difference of prepaids, accruals and reserves	7,971	7,816
Basis difference of prepaids, accruals and reserves	0	0
Pensions	1,075	3,152
Pensions	0	0
Tax effects of undistributed earnings from foreign subsidiaries not deemed to be indefinitely reinvested	0	0
Tax effects of undistributed earnings from foreign subsidiaries not deemed to be indefinitely reinvested	1,226	948
Basis difference of other assets and liabilities	458	0
Basis difference of other assets and liabilities	0	68
	41,554	53,074
	$ 23,223	$ 21,206