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Property, Plant and Equipment (Schedule of property, plant and equipment) (Details) - USD ($)
$ in Thousands
Dec. 30, 2023
Dec. 31, 2022
Property, Plant and Equipment [Line Items]    
Cost $ 446,922 $ 403,878
Accumulated depreciation 127,024 111,572
Net book value 319,898 292,306
Land [Member]    
Property, Plant and Equipment [Line Items]    
Cost 238 238
Accumulated depreciation 0 0
Net book value 238 238
Building [Member]    
Property, Plant and Equipment [Line Items]    
Cost 102,211 104,835
Accumulated depreciation 21,641 16,721
Net book value 80,570 88,114
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Cost 323,653 271,877
Accumulated depreciation 95,254 78,029
Net book value 228,399 193,848
Enterprise software [Member]    
Property, Plant and Equipment [Line Items]    
Cost 16,847 22,717
Accumulated depreciation 8,156 14,750
Net book value 8,691 7,967
Office furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Cost 3,568 3,719
Accumulated depreciation 1,715 1,767
Net book value 1,853 1,952
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Cost 405 492
Accumulated depreciation 258 305
Net book value $ 147 $ 187