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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Property, Plant and Equipment
Property, plant and equipment is comprised of the following (in thousands):
December 31, 2020March 31, 2021
Land$82,615 $81,981 
Buildings and improvements240,567 240,988 
Furniture, equipment and automobiles91,302 91,481 
Property, plant and equipment, at cost414,484 414,450 
Less: accumulated depreciation(145,433)(147,395)
Property, plant and equipment, net$269,051 $267,055