CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash flows from operating activities:    
Net income (loss) $ (34,645) $ (550,345)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation, depletion and amortization 63,783 101,258
Stock-based compensation expense - equity awards 4,585 6,409
Stock-based compensation expense - liability awards 10,414 0
Impairment and abandonment expense 9,200 611,300
Deferred tax expense (benefit) 0 (83,208)
Net (gain) loss on sale of long-lived assets (44) (245)
Non-cash portion of derivative (gain) loss 28,313 8,452
Amortization of debt issuance costs and discount 1,847 799
Changes in operating assets and liabilities:    
(Increase) decrease in accounts receivable (14,997) 41,026
(Increase) decrease in prepaid and other assets (264) (263)
Increase (decrease) in accounts payable and other liabilities 4,154 (34,365)
Net cash provided by operating activities 72,346 100,818
Cash flows from investing activities:    
Acquisition of oil and natural gas properties (433) (5,795)
Drilling and development capital expenditures (46,152) (161,895)
Purchases of other property and equipment (181) (486)
Proceeds from sales of oil and natural gas properties 168 1,200
Net cash used in investing activities (46,598) (166,976)
Cash flows from financing activities:    
Proceeds from borrowings under revolving credit facility 70,000 195,000
Repayment of borrowings under revolving credit facility (240,000) (135,000)
Proceeds from issuance of convertible senior notes 170,000 0
Debt issuance costs (5,444) 0
Premiums paid on capped call transactions (14,688) 0
Restricted stock used for tax withholdings (477) (208)
Net cash (used in) provided by financing activities (20,609) 59,792
Net increase (decrease) in cash, cash equivalents and restricted cash 5,139 (6,366)
Cash, cash equivalents and restricted cash, beginning of period 8,339 15,543
Cash, cash equivalents and restricted cash, end of period 13,478 9,177
Supplemental cash flow information    
Cash paid for interest 11,272 12,977
Supplemental non-cash activity    
Accrued capital expenditures included in accounts payable and accrued expenses 50,333 108,282
Asset retirement obligations incurred, including revisions to estimates 24 413
Restricted Cash and Cash Equivalents [Abstract]    
Total cash, cash equivalents and restricted cash $ 13,478 $ 9,177