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 consist of the following at the dates indicated (in thousands):

	Estimated Useful Lives (Years)	December 31,
		2015			2014
Land	N/A	$	669,130		$	655,847
Rights-of-way	(1)	107,293			104,754
Buildings and leasehold improvements	13-50	235,872			364,704
Jetties, subsea pipeline and docks	20-50	629,677			485,523
Gas storage facility	25-50	2,349			2,229
Pipelines and terminals	7-50	4,616,080			4,306,472
Vehicles, equipment and office furnishings	3-20	117,494			103,253
Processing facilities	30-50	557,853			—
Construction in progress	N/A	141,153			445,165
Total property, plant and equipment		7,076,901			6,467,947
Less: Accumulated depreciation		(874,820		)	(732,160		)
Total property, plant and equipment, net		$	6,202,081		$	5,735,787

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(1) Rights-of-way assets are depreciated over the useful life of the related pipeline assets.

Depreciation expense was $158.7 million, $148.4 million and $122.7 million for the years ended December 31, 2015, 2014 and 2013, respectively.