CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS — UNAUDITED - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net income (loss)	$ 409,391	$ (476,967)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Unrealized loss on derivatives	77,178	9,271
Depletion, depreciation and amortization	255,368	272,082
Accretion of asset retirement obligations	1,529	1,449
Full-cost ceiling impairment	0	575,164
Stock-based compensation expense	5,617	10,449
Deferred income tax provision (benefit)	1,488	(43,369)
Amortization of debt issuance cost	2,443	2,114
Net loss on asset sales and impairment	251	2,632
Changes in operating assets and liabilities
Accounts receivable	(111,221)	52,060
Lease and well equipment inventory	(1,179)	(632)
Prepaid expenses and other current assets	(9,515)	(411)
Other long-term assets	637	1,784
Accounts payable, accrued liabilities and other current liabilities	60,619	(61,452)
Royalties payable	25,313	(16,870)
Advances from joint interest owners	1,149	(7,125)
Other long-term liabilities	(242)	(220)
Net cash provided by operating activities	718,826	319,959
Investing activities
Drilling, completion and equipping capital expenditures	(317,486)	(400,554)
Acquisition of oil and natural gas properties	(29,720)	(65,437)
Midstream capital expenditures	(40,222)	(197,942)
Expenditures for other property and equipment	(465)	(1,796)
Proceeds from sale of assets	4,215	4,574
Net cash used in investing activities	(383,678)	(661,155)
Financing activities
Repayments of borrowings under Credit Agreement	(390,000)	0
Borrowings under Credit Agreement	70,000	220,000
Repayments of borrowings under San Mateo Credit Facility	(64,000)	0
Borrowings under San Mateo Credit Facility	87,500	38,400
Cost to amend credit facilities	(878)	(660)
Proceeds from stock options exercised	213	45
Dividends paid	(8,741)	0
Contributions related to formation of San Mateo	37,626	14,700
Contributions from non-controlling interest owners of less-than-wholly-owned subsidiaries	0	99,022
Distributions to non-controlling interest owners of less-than-wholly-owned subsidiaries	(45,815)	(32,830)
Taxes paid related to net share settlement of stock-based compensation	(4,161)	(1,556)
Other	(484)	6,850
Net cash (used in) provided by financing activities	(318,740)	343,971
Increase in cash and restricted cash	16,408	2,775
Cash and restricted cash at beginning of period	91,383	65,128
Cash and restricted cash at end of period	$ 107,791	$ 67,903