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Property, Plant and Equipment
 12 Months Ended
Jan. 01, 2022
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
A summary of property, plant and equipment follows (in thousands):
        
 January 1, 2022January 2, 2021
Land$161,244 $170,237 
Buildings and improvements701,594 684,459 
Machinery and equipment2,299,417 2,219,797 
Vehicles328,768 302,641 
Aircraft9,708 9,708 
Construction in process194,769 179,095 
3,695,500 3,565,937 
Accumulated depreciation(1,855,420)(1,702,123)
$1,840,080 $1,863,814 
Depreciation expense for the three years ended January 1, 2022, January 2, 2021 and December 28, 2019, was approximately $249.0 million, $276.2 million and $251.9 million, respectively.