Property and Equipment (Details) $ in Thousands	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2016 USD ($) $ / Boe	Oct. 20, 2016 USD ($) $ / Boe	Dec. 31, 2015 USD ($) $ / Boe	Dec. 31, 2014 USD ($) $ / Boe	Oct. 21, 2016 USD ($)
Property and equipment
Proved properties	$ 573,150
Unproved properties not being amortized	65,080
Other property and equipment	6,339				$ 6,210
Less accumulated depreciation, depletion, amortization and impairment	(12,974)
Net property and equipment	631,595				625,430
Other information
Capitalized qualifying share-based compensation expense	637
Other Property and Equipment
Other information
Depreciation	400
Oil and Gas Properties
Other information
Depletion expense related to oil and gas properties	$ 12,600
Depletion expense (per Boe) | $ / Boe	7.00
Costs capitalized to unevaluated properties	$ 700
Internal costs capitalized to oil and gas properties	1,400
Capitalized qualifying share-based compensation expense	$ 600
Predecessor
Property and equipment
Proved properties			$ 3,666,403
Other property and equipment			14,798		12,175
Less accumulated depreciation, depletion, amortization and impairment			(3,157,332)		(3,449,241)
Net property and equipment			523,869		$ 358,877
Other information
Capitalized qualifying share-based compensation expense		$ 476	1,347	$ 2,244
Predecessor | Other Property and Equipment
Other information
Depreciation		2,400	3,500	3,100
Predecessor | Oil and Gas Properties
Other information
Depletion expense related to oil and gas properties		$ 59,900	$ 195,200	$ 266,800
Depletion expense (per Boe) | $ / Boe		6.84	16.26	22.75
Costs capitalized to unevaluated properties			$ 4,900	$ 12,400
Internal costs capitalized to oil and gas properties		$ 3,400	7,300	12,400
Capitalized qualifying share-based compensation expense		$ 500	$ 1,300	$ 2,200