CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 42,028	$ 13,575
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred and non-current income taxes	11,330	4,352
Exploration	27
Gain on sale of oil and gas properties		(1)
Depreciation, depletion and amortization	110,425	37,590
Loss (gain) on derivative financial instruments	(61,899)	7,657
Cash settlements of derivative financial instruments	45,416	5,388
Amortization of debt discount, premium and issuance costs	7,199	1,574
Stock-based compensation	1,430	648
Decrease in accounts receivable	54,297	10,783
Decrease (increase) in other current assets	(3,828)	1,577
Decrease in accounts payable and accrued expenses	(56,306)	(8,428)
Net cash provided by operating activities	150,119	74,715
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(143,490)	(94,939)
Advance payments for drilling costs		6,030
Proceeds from sales of oil and gas properties		415
Net cash used for investing activities	(143,490)	(88,494)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings	57,000	45,000
Payments to retire debt	(57,000)	(25,000)
Preferred stock dividends paid	(9,572)
Debt and equity issuance costs	(47)	(90)
Income tax withholdings related to equity awards	(15)
Net cash provided by (used for) financing activities	(9,634)	19,910
Net increase (decrease) in cash and cash equivalents	(3,005)	6,131
Cash and cash equivalents, beginning of the year	18,532	23,193
Cash and cash equivalents, end of the year	$ 15,527	$ 29,324