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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment

The following is a summary of property, plant and equipment at December 31, 2018 and 2017 (in thousands):
 
 
 
December 31,
 
Estimated Useful Lives in Years
 
2018
 
2017
 
 
 
 
 
 
Land (1)
 
$
32,945

 
$
15,314

Land improvements
8-15
 
8,316

 
14,594

Buildings and improvements (1)
13-39
 
125,088

 
119,380

Rental machinery and equipment
7
 
887,064

 
898,146

Machinery and equipment - other
7
 
61,796

 
55,049

Furniture, fixtures and computers
5
 
24,745

 
27,259

Automobiles and other vehicles
5
 
29,696

 
29,971

Leasehold improvements
7-15, or lease term if shorter
 
15,392

 
10,030

Construction in progress - machinery and equipment and buildings
 
65,152

 
61,836

 
 
 
1,250,194

 
1,231,579

Less: Accumulated depreciation
 
 
(833,704
)
 
(761,933
)
Total property, plant and equipment, net
 
 
$
416,490

 
$
469,646

 
 
(1) 
The balances as of December 31, 2018 include the acquisition of land and buildings of $18.5 million and $18.5 million, respectively. See Note 13—Related Party Transactions for additional information.

During the third quarter of 2017, we committed to sell certain of our buildings in the International Services segment and determined those assets met the criteria to be classified as held for sale in our consolidated balance sheet. As a result, we reclassified the buildings, with a net book value of $4.1 million, from property, plant and equipment to assets held for sale and recognized a $0.3 million loss.

During the third quarter of 2018, a building in the International Services segment with a net book value of $5.0 million met the criteria to be classified as held for sale and was reclassified from property, plant and equipment to assets held for sale on our consolidated balance sheet.

No impairments were recognized during the years ended December 31, 2018, 2017 or 2016.
The following table presents the depreciation and amortization associated with each line for the periods ended December 31, 2018, 2017 and 2016 (in thousands):
 
December 31,
 
2018
 
2017
 
2016
Cost of revenues
 
 
 
 
 
 
Services
 
$
93,280

 
$
102,212

 
$
101,260

Products
 
4,354

 
4,971

 
4,254

General and administrative expenses
 
13,658

 
14,919

 
8,701

Total
 
$
111,292

 
$
122,102

 
$
114,215