Operating Segment Information (Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets	$ 881,834
Predecessor
Segment Reporting Information [Line Items]
Goodwill, net		$ 13,639	$ 13,600
Total assets		1,699,949
Well Construction And Completion
Segment Reporting Information [Line Items]
Total assets	6,378
Well Construction And Completion | Predecessor
Segment Reporting Information [Line Items]
Goodwill, net		6,389
Total assets		27,039
Other Partnership Management
Segment Reporting Information [Line Items]
Total assets	11,804
Other Partnership Management | Predecessor
Segment Reporting Information [Line Items]
Goodwill, net		7,250
Total assets		66,641
Gas And Oil Production
Segment Reporting Information [Line Items]
Total assets	819,454
Gas And Oil Production | Predecessor
Segment Reporting Information [Line Items]
Total assets		1,551,450
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	$ 44,198
Corporate and Other | Predecessor
Segment Reporting Information [Line Items]
Total assets		$ 54,819