Note 17 - Employee Benefit Plans - Assets at Fair Value (Details) - Foreign Plan [Member] - USD ($) $ in Thousands	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Asset Category:
Target Allocation	100.00%
Percentage of Plan Assets at Year End	100.00%	100.00%
Level 1	$ 249,313	$ 307,166	$ 258,365
Dutch Plan [Member]
Asset Category:
Level 1	90,323	127,844
Uk Plan [Member]
Asset Category:
Level 1	158,990	179,322
Fair Value, Inputs, Level 1 [Member]
Asset Category:
Level 1	79,146	87,521
Fair Value, Inputs, Level 1 [Member] | Dutch Plan [Member]
Asset Category:
Level 1	0	0
Fair Value, Inputs, Level 1 [Member] | Uk Plan [Member]
Asset Category:
Level 1	79,146	87,521
Fair Value, Inputs, Level 2 [Member]
Asset Category:
Level 1	60,913	68,668
Fair Value, Inputs, Level 2 [Member] | Dutch Plan [Member]
Asset Category:
Level 1	0	0
Fair Value, Inputs, Level 2 [Member] | Uk Plan [Member]
Asset Category:
Level 1	60,913	68,668
Fair Value, Inputs, Level 3 [Member]
Asset Category:
Level 1	109,254	150,977	$ 127,953
Fair Value, Inputs, Level 3 [Member] | Dutch Plan [Member]
Asset Category:
Level 1	90,323	127,844
Fair Value, Inputs, Level 3 [Member] | Uk Plan [Member]
Asset Category:
Level 1	$ 18,931	$ 23,133
Equity Securities [Member]
Asset Category:
Percentage of Plan Assets at Year End	16.00%	16.00%
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Asset Category:
Level 1	$ 39,392	$ 48,285
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Asset Category:
Level 1	0	0
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Asset Category:
Level 1	$ 0	$ 0
Equity Securities [Member] | Minimum [Member]
Asset Category:
Target Allocation	15.00%
Equity Securities [Member] | Maximum [Member]
Asset Category:
Target Allocation	20.00%
Debt Securities [Member]
Asset Category:
Percentage of Plan Assets at Year End	35.00%	32.00%
Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Asset Category:
Level 1	$ 33,134	$ 36,780
Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Asset Category:
Level 1	38,619	41,381
Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Asset Category:
Level 1	$ 16,012	$ 19,883
Debt Securities [Member] | Minimum [Member]
Asset Category:
Target Allocation	35.00%
Debt Securities [Member] | Maximum [Member]
Asset Category:
Target Allocation	45.00%
Other Securities [Member]
Asset Category:
Percentage of Plan Assets at Year End	49.00%	52.00%
Other Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Asset Category:
Level 1	$ 6,620	$ 2,456
Other Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Asset Category:
Level 1	22,294	27,287
Other Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Asset Category:
Level 1	$ 93,242	$ 131,094
Other Securities [Member] | Minimum [Member]
Asset Category:
Target Allocation	40.00%
Other Securities [Member] | Maximum [Member]
Asset Category:
Target Allocation	50.00%