v3.25.4
STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
OPERATING ACTIVITIES      
Net Income (Loss) $ 56,998 $ 250,603 $ 478,629
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and depletion 188,565 153,982 127,356
Deferred income tax (benefit) expense (9,393) (8,052) 52,871
Stock-based compensation expense 19,953 22,070 18,207
Mark-to-market (gain) loss on gas hedges (175) 1,835 0
Amortization of debt issuance costs and debt discount 1,563 1,590 2,094
Accretion and valuation adjustment of ARO 1,770 5,435 4,535
Loss on early extinguishment of debt 0 0 11,699
Changes in operating assets and liabilities:      
Trade accounts receivable (40,724) (42,642) 53,601
Other receivables 45 3,651 1,187
Income tax receivable 0 7,833 (7,833)
Inventories (28,316) (18,495) (30,785)
Prepaid expenses and other current assets (17,672) (4,155) (2,034)
Accounts payable 30,858 (2,551) 215
Accrued expenses and other current liabilities 33,188 1,207 (8,645)
Other (7,414) (4,863) 11
Net cash provided by operating activities 229,246 367,448 701,108
INVESTING ACTIVITIES      
Purchase of property, plant and equipment (320,261) (457,221) (491,674)
Deferred mine development costs (81,937) (31,060) (33,112)
Proceeds from (purchase of) investments 6,381 (49,721) 0
Acquisition of leased mineral rights (9,363) 0 0
Acquisitions, net of cash acquired 0 0 (2,421)
Proceeds from sale of property, plant and equipment 30 0 0
Net cash used in investing activities (405,150) (538,002) (527,207)
FINANCING ACTIVITIES      
Dividends paid (17,824) (43,823) (61,077)
Retirements of debt 0 0 (162,358)
Proceeds from financing lease obligations 48,771 4,503 0
Principal repayments of financing lease obligations (36,942) (17,414) (32,330)
Payments for taxes related to net share settlement of equity awards (9,384) (11,777) (9,419)
Net cash used in financing activities (15,379) (68,511) (265,184)
Net decrease in cash and cash equivalents (191,283) (239,065) (91,283)
Cash, cash equivalents and restricted cash at beginning of period 499,132 738,197 829,480
Cash, cash equivalents and restricted cash at end of period 307,849 499,132 738,197
Cash and cash equivalents 299,963 491,547 738,197
Restricted cash 7,886 7,585 0
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:      
Interest paid, net of capitalized interest 19,915 13,621 23,970
Cash paid for income taxes 8,600 26,500 27,004
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:      
Financing leases - equipment $ 92,679 $ 12,147 $ 11,312