Price-Risk Management Price-Risk Management (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) bbl MMBTU $ / MMBTU $ / Boe	Dec. 31, 2019 USD ($)
Derivative [Line Items]
Gain (Loss) on Price Risk Derivatives, Net | $	$ 61,300	$ 24,200
Cash Received (Paid) On Settlements of Derivative Contracts | $	78,421	24,631
Cash Received (Paid) On Monetized Derivative Contracts | $	38,300
Receivables for Settled Derivatives | $	800	2,900
Payables for Settled Derivatives | $	800	200
Derivative, Fair Value, Net | $	(6,000)	8,400
Other Current Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset | $	4,800	12,800
Other Noncurrent Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset | $	300	3,900
Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability | $	8,200	6,600
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability | $	$ 2,900	$ 1,600
Swap [Member] | First Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl	143,538
Derivative, Swap Type, Average Fixed Price | $ / Boe	51.89
Swap [Member] | First Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	2,398,078
Derivative, Swap Type, Average Fixed Price	2.74
Swap [Member] | Second Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl	195,646
Derivative, Swap Type, Average Fixed Price | $ / Boe	51.93
Swap [Member] | Second Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	832,255
Derivative, Swap Type, Average Fixed Price	2.42
Swap [Member] | Third Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl	179,759
Derivative, Swap Type, Average Fixed Price | $ / Boe	51.19
Swap [Member] | Third Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	330,000
Derivative, Swap Type, Average Fixed Price	2.62
Swap [Member] | Fourth Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl	163,812
Derivative, Swap Type, Average Fixed Price | $ / Boe	52.39
Swap [Member] | Fourth Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	290,000
Derivative, Swap Type, Average Fixed Price	2.69
Swap [Member] | First Quarter 2022 | Oil Derivative [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl	88,455
Derivative, Swap Type, Average Fixed Price | $ / Boe	36.79
Swap [Member] | Third Quarter 2022 | Oil Derivative [Member]
Derivative [Line Items]
Portion of Future Oil and Gas Production Being Hedged | bbl	108,100
Derivative, Swap Type, Average Fixed Price | $ / Boe	41.58
Collar Contracts [Member] | First Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	34.15
Derivative, Average Cap Price	39.24
Derivative, Nonmonetary Notional Amount | MMBTU	155,475
Collar Contracts [Member] | First Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	2.53
Derivative, Average Cap Price	3.33
Derivative, Nonmonetary Notional Amount | MMBTU	7,027,800
Collar Contracts [Member] | Second Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	34.33
Derivative, Average Cap Price	40.30
Derivative, Nonmonetary Notional Amount | MMBTU	116,980
Collar Contracts [Member] | Second Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	2.26
Derivative, Average Cap Price	2.70
Derivative, Nonmonetary Notional Amount | MMBTU	5,911,000
Collar Contracts [Member] | Third Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	34.34
Derivative, Average Cap Price	39.87
Derivative, Nonmonetary Notional Amount | MMBTU	90,620
Collar Contracts [Member] | Third Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	2.15
Derivative, Average Cap Price	2.70
Derivative, Nonmonetary Notional Amount | MMBTU	6,045,175
Collar Contracts [Member] | Fourth Quarter 2021 [Member] | Oil Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	34.70
Derivative, Average Cap Price	41.01
Derivative, Nonmonetary Notional Amount | MMBTU	84,640
Collar Contracts [Member] | Fourth Quarter 2021 [Member] | Natural Gas Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	2.35
Derivative, Average Cap Price	2.76
Derivative, Nonmonetary Notional Amount | MMBTU	5,311,000
Collar Contracts [Member] | First Quarter 2022 | Oil Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	40.00
Derivative, Average Cap Price	45.55
Derivative, Nonmonetary Notional Amount | MMBTU	40,500
Collar Contracts [Member] | First Quarter 2022 | Natural Gas Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	2.50
Derivative, Average Cap Price	3.35
Derivative, Nonmonetary Notional Amount | MMBTU	4,415,000
Collar Contracts [Member] | Second Quarter 2022 | Oil Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	39.25
Derivative, Average Cap Price	46.20
Derivative, Nonmonetary Notional Amount | MMBTU	115,850
Collar Contracts [Member] | Second Quarter 2022 | Natural Gas Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	2.23
Derivative, Average Cap Price	2.70
Derivative, Nonmonetary Notional Amount | MMBTU	4,200,000
Collar Contracts [Member] | Third Quarter 2022 | Natural Gas Derivative [Member]
Derivative [Line Items]
Derivative, Average Floor Price	2.39
Derivative, Average Cap Price	2.74
Derivative, Nonmonetary Notional Amount | MMBTU	3,933,000
Basis Swap [Member] | First Quarter 2021 [Member] | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	9,900,000
Derivative, Swap Type, Average Fixed Price	(0.022)
Basis Swap [Member] | First Quarter 2021 [Member] | Oil Basis Derivative [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	1.19
Derivative, Nonmonetary Notional Amount | bbl	373,750
Basis Swap [Member] | First Quarter 2021 [Member] | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.40)
Derivative, Nonmonetary Notional Amount | bbl	367,000
Basis Swap [Member] | Second Quarter 2021 [Member] | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	10,010,000
Derivative, Swap Type, Average Fixed Price	(0.022)
Basis Swap [Member] | Second Quarter 2021 [Member] | Oil Basis Derivative [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	1.22
Derivative, Nonmonetary Notional Amount | bbl	329,150
Basis Swap [Member] | Second Quarter 2021 [Member] | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.37)
Derivative, Nonmonetary Notional Amount | bbl	313,900
Basis Swap [Member] | Third Quarter 2021 [Member] | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	10,120,000
Derivative, Swap Type, Average Fixed Price	(0.022)
Basis Swap [Member] | Third Quarter 2021 [Member] | Oil Basis Derivative [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	1.27
Derivative, Nonmonetary Notional Amount | bbl	262,200
Basis Swap [Member] | Third Quarter 2021 [Member] | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.34)
Derivative, Nonmonetary Notional Amount | bbl	253,000
Basis Swap [Member] | Fourth Quarter 2021 [Member] | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	10,120,000
Derivative, Swap Type, Average Fixed Price	(0.022)
Basis Swap [Member] | Fourth Quarter 2021 [Member] | Oil Basis Derivative [Member]
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	1.28
Derivative, Nonmonetary Notional Amount | bbl	241,500
Basis Swap [Member] | Fourth Quarter 2021 [Member] | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.33)
Derivative, Nonmonetary Notional Amount | bbl	241,500
Basis Swap [Member] | First Quarter 2022 | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	1,800,000
Derivative, Swap Type, Average Fixed Price	(0.080)
Basis Swap [Member] | First Quarter 2022 | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.12)
Derivative, Nonmonetary Notional Amount | bbl	90,000
Basis Swap [Member] | Second Quarter 2022 | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	1,820,000
Derivative, Swap Type, Average Fixed Price	(0.080)
Basis Swap [Member] | Second Quarter 2022 | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.12)
Derivative, Nonmonetary Notional Amount | bbl	91,000
Basis Swap [Member] | Third Quarter 2022 | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	1,840,000
Derivative, Swap Type, Average Fixed Price	(0.080)
Basis Swap [Member] | Third Quarter 2022 | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.12)
Derivative, Nonmonetary Notional Amount | bbl	92,000
Basis Swap [Member] | Fourth Quarter 2022 | Natural Gas Basis Derivative [Member]
Derivative [Line Items]
Future Gas Production Hedged in MMBtu (Energy Item Type) | MMBTU	1,840,000
Derivative, Swap Type, Average Fixed Price	(0.080)
Basis Swap [Member] | Fourth Quarter 2022 | Oil Basis Calendar Monthly Roll Differential Swap
Derivative [Line Items]
Derivative, Swap Type, Average Fixed Price	(0.12)
Derivative, Nonmonetary Notional Amount | bbl	92,000