Annual report pursuant to Section 13 and 15(d)

PROPERTY AND EQUIPMENT (Details)

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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Subtotal $ 1,142,448 $ 651,787
Less accumulated depreciation 229,602 180,877
Property and equipment — net 912,846 470,910
Land    
Property, Plant and Equipment [Line Items]    
Subtotal 7,669 0
Building    
Property, Plant and Equipment [Line Items]    
Subtotal 23,840 0
Equipment and vehicles    
Property, Plant and Equipment [Line Items]    
Subtotal 1,105,380 646,800
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Subtotal $ 5,559 $ 4,987