Property, Plant and Equipment and Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

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

					Estimated  Depreciable Lives
	December 31,
	2016		2017
Construction work-in-progress	$	500,208	$	389,414
Land and rights-of-way	339,561		303,797
Buildings	101,065		114,899		10 to 56 years
Storage tanks	1,829,223		1,897,046		10 to 40 years
Pipeline and station equipment	2,457,429		2,581,950		10 to 69 years
Processing equipment	1,350,032		1,703,478		3 to 56 years
Other	206,219		244,884		3 to 53 years
Property, Plant and Equipment, Gross	$	6,783,737	$	7,235,468