Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Table

A summary of the historical cost of property, plant and equipment is as follows:

		December 31,
thousands	Estimated Useful Life	2015		2014
Land	n/a	$	3,744	$	3,437
Gathering systems	3 to 47 years	6,061,004		5,559,369
Pipelines and equipment	15 to 45 years	136,290		151,107
Assets under construction	n/a	329,887		512,269
Other	3 to 40 years	25,853		22,395
Total property, plant and equipment		6,556,778		6,248,577
Accumulated depreciation		1,697,999		1,110,722
Net property, plant and equipment		$	4,858,779	$	5,137,855