Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

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	2021		2020
Land	N/A	$	10,955	$	9,696
Gathering systems – pipelines	30 years	5,386,003		5,231,212
Gathering systems – compressors	15 years	2,172,953		2,096,905
Processing complexes and treating facilities	25 years	3,375,317		3,424,368
Transportation pipeline and equipment	6 to 45 years	169,356		168,205
Produced-water disposal systems	20 years	882,527		831,719
Assets under construction	N/A	98,473		176,834
Other	3 to 40 years	750,494		702,806
Total property, plant, and equipment		12,846,078		12,641,745
Less accumulated depreciation		4,333,171		3,931,800
Net property, plant, and equipment		$	8,512,907	$	8,709,945