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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Operating activities |  |
Net cash (used for) provided by operating activities | $ (9,758) | $ 6,254
Investing activities |  |
Expenditures for property, plant and equipment and acquisition of mineral interests | (14,483) | (7,879)
Proceeds from the sale of property, plant and equipment | 11 | 272
Proceeds from the sale of private company equity units | 0 | 1,153
Other | (163) | (10)
Net cash used for investing activities | (14,635) | (6,464)
Financing activities |  |
Additions to long-term debt | 1,327 | 2,112
Reductions of long-term debt | (1,295) | (1,456)
Net additions to revolving credit agreements | 7,000 | 0
Cash dividends paid | (1,630) | (1,557)
Purchase of treasury shares | (4,274) | 0
Net cash provided by (used for) financing activities | 1,128 | (901)
Cash and cash equivalents |  |
Total decrease for the period | (23,265) | (1,111)
Balance at the beginning of the period | 85,109 | 110,748
Balance at the end of the period | $ 61,844 | $ 109,637

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