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Note 13 - Property and Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]

(in thousands)

 

September 30, 2020

   

December 31, 2019

   

September 30, 2019

 

Equipment and vehicles

  $ 959,828     $ 947,687     $ 949,577  

Quarry property

    199,677       188,960       185,792  

Land and land improvements

    135,102       132,531       134,543  

Buildings and leasehold improvements

    122,119       122,316       112,940  

Office furniture and equipment

    72,675       67,991       66,791  

Property and equipment

    1,489,401       1,459,485       1,449,643  

Less: accumulated depreciation and depletion

    953,145       917,188       906,847  

Property and equipment, net

  $ 536,256     $ 542,297     $ 542,796