Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Property and equipment:      
Total property and equipment $ 3,080,477   $ 2,974,922
Less accumulated depreciation (401,752)   (369,320)
Property and equipment, net 2,678,725   2,605,602
Interest cost capitalized $ 3,000 $ 3,000  
Asset Retirement Obligations      
Post-closure period for landfill to maintain and monitor 30 years    
Midstream LTIP      
Stock-Based Compensation      
Number of stock-based compensation awards authorized 10,000,000    
Land      
Property and equipment:      
Total property and equipment $ 16,099   15,382
Fresh water surface pipelines and equipment      
Property and equipment:      
Estimated useful lives 5 years    
Total property and equipment $ 48,500   46,139
Above ground storage tanks      
Property and equipment:      
Estimated useful lives 10 years    
Total property and equipment $ 4,824   4,301
Fresh water permanent buried pipelines and equipment      
Property and equipment:      
Estimated useful lives 20 years    
Total property and equipment $ 477,536   472,810
Gathering systems and facilities      
Property and equipment:      
Estimated useful lives 20 years    
Total property and equipment $ 1,907,042   1,781,386
Landfill      
Property and equipment:      
Total property and equipment 46,007    
Construction-in-progress      
Property and equipment:      
Total property and equipment 580,469   $ 654,904
Construction-in-progress - wastewater treatment facility      
Property and equipment:      
Total property and equipment $ 319,000