Property, Plant and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

The following is a summary of property, plant and equipment at December 31, 2017 and 2016 (in thousands):



		December 31,
	Estimated Useful Lives in Years	2017			2016

Land	—	$	15,314		$	15,730
Land improvements ⁽¹⁾	8-15	14,594			9,379
Buildings and improvements ⁽¹⁾	39	119,380			73,211
Rental machinery and equipment	7	898,146			933,667
Machinery and equipment - other	7	55,049			60,182
Furniture, fixtures and computers	5	27,259			19,073
Automobiles and other vehicles	5	29,971			36,796
Aircraft	7	—			16,267
Leasehold improvements ⁽¹⁾	7-15, or lease term if shorter	10,030			8,027
Construction in progress - machinery and equipment and buildings ⁽¹⁾	—	61,836			120,937
		1,231,579			1,293,269
Less: Accumulated depreciation		(761,933		)	(726,245		)
Total property, plant and equipment, net		$	469,646		$	567,024


⁽¹⁾	See Note 13 - Related Party Transactions for additional information.

During the third quarter of 2017, we committed to sell certain buildings in the Middle East region 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.

No impairments were recognized during the years ended December 31, 2017, 2016 or 2015.

The following table presents the depreciation and amortization associated with each line for the periods ended December 31, 2017, 2016 and 2015 (in thousands):



	December 31,
		2017		2016		2015
Cost of revenues
Services		$	102,212	$	101,260	$	95,825
Products		4,971		4,254		4,233
General and administrative expenses		14,919		8,701		8,904
Total		$	122,102	$	114,215	$	108,962