Price-Risk Management Price-Risk Management (Details) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 22, 2016 USD ($)	Dec. 31, 2016 USD ($) MMBTU $ / Boe $ / MMBTU bbl	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Derivative [Line Items]
Receivables for Settled Derivatives | $		$ 400
Payables for Settled Derivatives | $		1,800
Derivative, Fair Value, Net | $		(16,400)
Other Current Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset | $		500
Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability | $		15,800
Other Noncurrent Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset | $		0
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability | $		1,000
Predecessor [Member]
Derivative [Line Items]
Gain (Loss) on Price Risk Derivatives, Net | $			$ 200	$ 1,300
Cash Received (Paid) On Settlements of Derivative Contracts | $	$ 0		$ 2,544	$ (1,053)
Successor [Member]
Derivative [Line Items]
Gain (Loss) on Price Risk Derivatives, Net | $		(19,700)
Cash Received (Paid) On Settlements of Derivative Contracts | $		$ (1,928)
Swap [Member] | First Quarter 2018 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		4,395,000
Derivative, Swap Type, Average Fixed Price		3.47
Swap [Member] | First Quarter 2017 [Member] | Successor [Member] | Commodity Contract [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl		106,245
Derivative, Swap Type, Average Fixed Price | $ / Boe		48.04
Swap [Member] | First Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		4,500,000
Derivative, Swap Type, Average Fixed Price		3.13
Swap [Member] | Second Quarter 2017 [Member] | Successor [Member] | Commodity Contract [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl		97,401
Derivative, Swap Type, Average Fixed Price | $ / Boe		48.13
Swap [Member] | Second Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		5,420,005
Derivative, Swap Type, Average Fixed Price		2.96
Swap [Member] | Third Quarter 2017 [Member] | Successor [Member] | Commodity Contract [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl		90,000
Derivative, Swap Type, Average Fixed Price | $ / Boe		48.16
Swap [Member] | Third Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		5,104,999
Derivative, Swap Type, Average Fixed Price		2.98
Swap [Member] | Fourth Quarter 2017 [Member] | Successor [Member] | Commodity Contract [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl		84,798
Derivative, Swap Type, Average Fixed Price | $ / Boe		48.18
Swap [Member] | Fourth Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		3,725,001
Derivative, Swap Type, Average Fixed Price		2.92
Collars [Member] | First Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		550,000
Derivative, Average Floor Price		3.300
Derivative, Average Cap Price		3.900
Collars [Member] | Second Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		2,400,000
Derivative, Average Floor Price		3.050
Derivative, Average Cap Price		3.545
Collars [Member] | Third Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		2,865,000
Derivative, Average Floor Price		3.050
Derivative, Average Cap Price		3.585
Collars [Member] | Fourth Quarter 2017 [Member] | Successor [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		3,102,000
Derivative, Average Floor Price		3.100
Derivative, Average Cap Price		3.715
Basis Swap [Member] | First Quarter 2018 [Member] | Successor [Member] | Other Contract [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		1,500,000
Basis Differential Derivative Swap		(0.08)
Basis Swap [Member] | First Quarter 2017 [Member] | Successor [Member] | Other Contract [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		5,050,000
Basis Differential Derivative Swap		(0.08)
Basis Swap [Member] | Second Quarter 2017 [Member] | Successor [Member] | Other Contract [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		7,820,005
Basis Differential Derivative Swap		(0.03)
Basis Swap [Member] | Third Quarter 2017 [Member] | Successor [Member] | Other Contract [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		7,969,999
Basis Differential Derivative Swap		(0.02)
Basis Swap [Member] | Fourth Quarter 2017 [Member] | Successor [Member] | Other Contract [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU		6,827,001
Basis Differential Derivative Swap		(0.04)