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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
13. Property, Plant and Equipment:
A summary of property, plant and equipment, at cost, and related accumulated depreciation is as follows:
December 31,
20212020
Land$97,047 $93,650 
Buildings and improvements77,851 76,010 
Machinery and equipment714,435 656,502 
Construction in progress45,952 42,447 
935,285 868,609 
Less: accumulated depreciation(339,054)(276,899)
$596,231 $591,710 
Depreciation expense was $65,955, $65,333 and $61,244 for the years ended December 31, 2021, 2020 and 2019, respectively.