Property, Plant and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

PROPERTY, PLANT AND EQUIPMENT

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

	December 31,
	2015			2014
Land	$	89,815		$	81,886
Pipelines and related facilities	338,789			283,347
Storage and terminal facilities	283,608			284,300
Natural gas gathering and processing facilities	810,358			606,553
Linefill	26,900			26,050
Trucking equipment and other	43,157			40,392
Office property and equipment	45,818			37,120
Construction-in-progress	248,145			142,806
Property, plant and equipment, gross	1,886,590			1,502,454
Accumulated depreciation	(319,769		)	(245,629		)
Property, plant and equipment, net	$	1,566,821		$	1,256,825

We recorded depreciation expense of $90.5 million, $82.5 million and $60.4 million for the years ended December 31, 2015, 2014 and 2013, respectively.

We include within the cost of property, plant and equipment interest costs incurred while an asset is being constructed. We capitalized $1.0 million, $1.5 million and $4.3 million of interest costs during the years ended December 31, 2015, 2014 and 2013, respectively.