XML 18 R6.htm IDEA: XBRL DOCUMENT v3.21.2
CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
OPERATING ACTIVITIES    
Net (loss) income $ (26,036) $ 12,384
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation and depletion 73,054 50,848
Deferred income tax expense (benefit) 17,006 (1,154)
Stock based compensation expense 7,240 3,724
Amortization of debt issuance costs and debt discount/premium, net 855 708
Accretion of asset retirement obligations 1,610 1,466
Changes in operating assets and liabilities:    
Trade accounts receivable 18,139 22,462
Inventories 33,048 (45,594)
Prepaid expenses and other receivables 10,495 (5,693)
Accounts payable (12,313) 17,379
Accrued expenses and other current liabilities (16,175) (9,087)
Other 6,977 5,543
Net cash provided by operating activities 113,900 52,986
INVESTING ACTIVITIES    
Purchase of property, plant and equipment (23,651) (48,754)
Deferred mine development costs (13,462) (8,731)
Proceeds from sale of property, plant and equipment 192 0
Sale of short-term investments 0 14,733
Purchases of short-term investments 0 (8,500)
Net cash used in investing activities (36,921) (51,252)
FINANCING ACTIVITIES    
Dividends paid (5,229) (5,197)
Borrowings under ABL Facility 0 70,000
Repayments under ABL Facility 0 (30,000)
Principal repayments of finance lease obligations (13,984) (7,985)
Other (2,806) (1,272)
Net cash (used in) provided by financing activities (22,019) 25,546
Net increase in cash and cash equivalents 54,960 27,280
Cash and cash equivalents at beginning of period 211,916 193,383
Cash and cash equivalents at end of period $ 266,876 $ 220,663