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

As Restated

 
(in thousands)  June 30, 2020   December 31, 2019  June 30, 2019 

Equipment and vehicles

 $959,083  $947,687  $943,456 

Quarry property

  196,033   188,960   191,972 

Land and land improvements

  135,707   132,531   135,411 

Buildings and leasehold improvements

  121,387   122,316   109,356 

Office furniture and equipment

  69,258   67,991   66,587 

Property and equipment

  1,481,468   1,459,485   1,446,782 

Less: accumulated depreciation and depletion

  941,415   917,188   888,404 

Property and equipment, net

 $540,053  $542,297  $558,378