PROPERTY, PLANT AND EQUIPMENT (Tables)

6 Months Ended

Jun. 30, 2015

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

	Estimated Useful Lives (Years)	December 31, 2014			June 30,  2015
		(dollars in thousands)
Land	N/A	$	18,292		$	19,567
Land improvements	10-20	6,398			6,465
Pipelines and facilities	5-30	168,537			176,880
Storage and terminal facilities	10-35	240,004			252,018
Transportation equipment	3-10	13,557			12,722
Office property and equipment and other	3-20	28,958			29,164
Pipeline linefill and tank bottoms	N/A	10,186			10,186
Construction-in-progress	N/A	16,671			21,018
Property, plant and equipment, gross		502,603			528,020
Accumulated depreciation		(192,440		)	(203,999		)
Property, plant and equipment, net		$	310,163		$	324,021