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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (5,277) $ (40,894)
Adjustments to reconcile net loss to net cash provided by operating activities    
Provision for doubtful accounts 72 (335)
Depreciation, depletion, and amortization 39,408 31,150
Impairment 0 4,170
Debt issuance costs amortization 117 117
Amortization of premiums and discounts on debt 0 (47)
Gain on extinguishment of debt 0 (1,151)
Loss on derivative contracts 209 18,330
Cash received (paid) on settlement of derivative contracts 5,078 (6,119)
Stock-based compensation 996 15,872
Other (35) (235)
Changes in operating assets and liabilities (8,998) 9,549
Net cash provided by operating activities 31,570 30,407
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures for property, plant and equipment (62,254) (65,527)
Acquisition of assets 326 0
Proceeds from sale of assets 341 955
Net cash used in investing activities (61,587) (64,572)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from borrowings 39,596 0
Repayments of borrowings (19,596) (36,304)
Reduction of financing lease liability (293) 0
Cash paid for tax withholdings on vested stock awards 0 (1,661)
Net cash provided by (used in) financing activities 19,707 (37,965)
NET DECREASE IN CASH, CASH EQUIVALENTS and RESTRICTED CASH (10,310) (72,130)
CASH, CASH EQUIVALENTS and RESTRICTED CASH, beginning of year 19,645 101,308
CASH, CASH EQUIVALENTS and RESTRICTED CASH, end of period 9,335 29,178
Supplemental Disclosure of Cash Flow Information    
Cash paid for interest, net of amounts capitalized (408) 0
Supplemental Disclosure of Noncash Investing and Financing Activities    
Change in accrued capital expenditures (9,190) 28,258
Right-of-use assets obtained in exchange for financing lease obligations $ 1,992 $ 0