XML 24 R15.htm IDEA: XBRL DOCUMENT v3.22.1
PROPERTY, PLANT AND EQUIPMENT
 3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment consisted of the following (in thousands):
March 31, 2022December 31, 2021
Land$174,480 $165,010 
Asset retirement costs (non-landfill)19,154 19,105 
Landfill assets208,481 205,873 
Buildings and improvements (1)
568,493 551,795 
Camp equipment129,304 127,680 
Vehicles (2)
926,148 912,836 
Equipment (3)
2,116,923 2,092,395 
Furniture and fixtures6,390 6,444 
Construction in progress75,578 60,447 
4,224,951 4,141,585 
Less - accumulated depreciation and amortization2,343,409 2,278,410 
Total property, plant and equipment, net$1,881,542 $1,863,175 
________________
(1) Balances inclusive of gross right-of-use ("ROU") assets classified as finance leases of $8.0 million and $8.9 million respectively.
(2) Balances inclusive of gross ROU assets classified as finance leases of $82.4 million and $77.7 million, respectively.
(3) Balances inclusive of gross ROU assets classified as finance leases of $9.3 million in both periods.
Depreciation expense, inclusive of landfill and finance lease amortization, was $72.1 million and $64.6 million for the three months ended March 31, 2022 and 2021, respectively.