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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Operating activities |  |
Net cash (used for) provided by operating activities | $ (2,879) | $ 63,020
Investing activities |  |
Expenditures for property, plant and equipment and acquisition of mineral interests | (30,697) | (37,894)
Proceeds from the sale of property, plant and equipment | 416 | 323
Proceeds from the sale of private company equity units | 0 | 1,153
Other | (774) | (1,137)
Net cash used for investing activities | (31,055) | (37,555)
Financing activities |  |
Additions to long-term debt | 3,090 | 790
Reductions of long-term debt | (3,894) | (3,186)
Net additions to revolving credit agreements | 27,221 | 0
Cash dividends paid | (4,964) | (4,826)
Purchase of treasury shares | (9,576) | (824)
Net cash provided by (used for) financing activities | 11,877 | (8,046)
Cash and cash equivalents |  |
Total (decrease) increase for the period | (22,057) | 17,419
Balance at the beginning of the period | 85,109 | 110,748
Balance at the end of the period | $ 63,052 | $ 128,167

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-24 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-4 + Details
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