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	$	3,191	$	2,884
Gathering systems	3 to 47 years	5,420,762		4,972,892
Pipelines and equipment	15 to 45 years	136,290		151,107
Assets under construction	n/a	324,720		483,347
Other	3 to 40 years	19,674		16,420
Total property, plant and equipment		5,904,637		5,626,650
Accumulated depreciation		1,614,663		1,055,207
Net property, plant and equipment		$	4,289,974	$	4,571,443