Property, Plant and Equipment, net

12 Months Ended

Dec. 31, 2014

7. Property, Plant and Equipment, net

Property, plant and equipment, net, consisted of the following (in thousands):

	December 31,
	2014			2013
Compression equipment, facilities and other fleet assets	$	4,916,576		$	4,304,019
Land and buildings	206,257			197,778
Transportation and shop equipment	297,239			288,042
Other	197,114			181,411
	5,617,186			4,971,250
Accumulated depreciation	(2,290,294		)	(2,150,978		)
Property, plant and equipment, net	$	3,326,892		$	2,820,272

Depreciation expense was $367.3 million, $312.4 million and $328.1 million during the years ended December 31, 2014, 2013 and 2012, respectively. Assets under construction of $153.3 million and $130.5 million were primarily included in compression equipment, facilities and other fleet assets at December 31, 2014 and 2013, respectively. We capitalized $0.2 million, $0.3 million and $1.2 million of interest related to construction in process during the years ended December 31, 2014, 2013 and 2012, respectively.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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