Segment Information (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Revenues	$ 224,288	$ 216,338
Number of segments \| segment	2
Realized gain on derivatives	$ 10,867	3,270
Unrealized gain (loss) on derivatives	136,430	(45,719)
Expenses	178,053	166,348
Operating (loss) income	193,532	7,541
Total assets	4,333,671	3,583,298	$ 4,069,676
Capital expenditures	278,595	227,850
Depletion, depreciation and amortization	90,707	76,866
Corporate
Segment Reporting Information [Line Items]
Realized gain on derivatives	0	0
Unrealized gain (loss) on derivatives	0	0
Expenses	14,317	16,950
Operating (loss) income	(14,317)	(16,950)
Total assets	47,001	62,087
Capital expenditures	787	807
Depletion, depreciation and amortization	700	600
Consolidations and Eliminations
Segment Reporting Information [Line Items]
Realized gain on derivatives	0	0
Unrealized gain (loss) on derivatives	0	0
Expenses	(21,919)	(18,416)
Operating (loss) income	0	0
Total assets	0	0
Capital expenditures	0	0
Exploration and Production \| Operating Segments
Segment Reporting Information [Line Items]
Realized gain on derivatives	10,867	3,270
Unrealized gain (loss) on derivatives	136,430	(45,719)
Expenses	161,325	141,980
Operating (loss) income	186,362	7,234
Total assets	3,571,257	3,043,375
Capital expenditures	209,735	197,611
Depletion, depreciation and amortization	85,200	72,600
Capital expenditures attributable to land and seismic acquisition expenditures	39,700	23,100
Midstream \| Operating Segments
Segment Reporting Information [Line Items]
Realized gain on derivatives	0	0
Unrealized gain (loss) on derivatives	0	0
Expenses	24,330	25,834
Operating (loss) income	21,487	17,257
Total assets	715,413	477,836
Capital expenditures	68,073	29,432
Depletion, depreciation and amortization	4,800	3,700
Net income attributable to non-controlling interest in subsidiaries		(7,500)
Capital expenditures attributable to non-controlling interest	47,600	13,700
Operating Income (Loss) \| Midstream \| Operating Segments
Segment Reporting Information [Line Items]
Net income attributable to non-controlling interest in subsidiaries	(9,400)
Oil and natural gas revenues
Segment Reporting Information [Line Items]
Revenues	197,914	193,269
Oil and natural gas revenues \| Corporate
Segment Reporting Information [Line Items]
Revenues	0	0
Oil and natural gas revenues \| Consolidations and Eliminations
Segment Reporting Information [Line Items]
Revenues	0	0
Oil and natural gas revenues \| Exploration and Production \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	196,795	191,663
Oil and natural gas revenues \| Midstream \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,119	1,606
Third-party midstream services revenues
Segment Reporting Information [Line Items]
Revenues	15,830	11,838
Third-party midstream services revenues \| Corporate
Segment Reporting Information [Line Items]
Revenues	0	0
Third-party midstream services revenues \| Consolidations and Eliminations
Segment Reporting Information [Line Items]
Revenues	(21,919)	(18,416)
Third-party midstream services revenues \| Exploration and Production \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	0	0
Third-party midstream services revenues \| Midstream \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	37,749	30,254
Sales of purchased natural gas
Segment Reporting Information [Line Items]
Revenues	10,544	11,231
Sales of purchased natural gas \| Corporate
Segment Reporting Information [Line Items]
Revenues	0	0
Sales of purchased natural gas \| Consolidations and Eliminations
Segment Reporting Information [Line Items]
Revenues	0	0
Sales of purchased natural gas \| Exploration and Production \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,595	0
Sales of purchased natural gas \| Midstream \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	$ 6,949	$ 11,231

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Payments to Acquire Productive Assets, Noncontrolling Interest

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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