CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ 17,138	$ (14,872)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation, depletion, amortization and accretion expense	208,197	179,945
Write-down of oil and natural gas properties and other well inventory	190	12,361
Amortization of deferred financing costs and original issue discount	3,985	2,393
Equity based compensation, net of amounts capitalized	3,974	3,220
Price risk management activities expense (income)	(174,535)	79,589
Net cash received (paid) on settled derivative instruments	122,499	(12,562)
Gain on extinguishment of debt	(1,470)
Settlement of asset retirement obligations	(18,496)	(32,206)
Changes in operating assets and liabilities:
Accounts receivable	(5,164)	(32,118)
Other current assets	15,128	12,259
Accounts payable	12,645	23,646
Other current liabilities	16,039	(37,164)
Other non-current assets and liabilities, net	(8,518)	(1,870)
Net cash provided by operating activities	191,612	182,621
Cash flows from investing activities:
Exploration, development and other capital expenditures	(154,628)	(229,601)
Cash paid for acquisitions, net of cash acquired	(296,966)	(32,916)
Proceeds from sale of other property and equipment		5,369
Net cash provided by (used in) investing activities	(451,594)	(257,148)
Cash flows from financing activities:
Redemption of Senior Notes and other long-term debt	(1,209)	(10,567)
Proceeds from Bank Credit Facility	300,000	75,000
Repayment of Bank Credit Facility		(25,000)
Deferred financing costs	(1,287)
Other deferred payments	(7,575)	(9,921)
Payments of finance lease	(8,323)	(6,759)
Employee stock transactions	(791)	(283)
Net cash provided by (used in) financing activities	280,815	22,470
Net increase (decrease) in cash, cash equivalents and restricted cash	20,833	(52,057)
Cash, cash equivalents and restricted cash:
Balance, beginning of period	87,022	141,162
Balance, end of period	107,855	89,105
Supplemental Non-Cash Transactions:
Capital expenditures included in accounts payable and accrued liabilities	113,461	165,310
Debt exchanged for common stock	35,960
Supplemental Cash Flow Information:
Interest paid, net of amounts capitalized	$ 34,163	$ 31,413