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Miscellaneous Other Income
 12 Months Ended
Dec. 31, 2024
Other Income and Expenses [Abstract]  
Miscellaneous Other Income MISCELLANEOUS OTHER INCOME:
For the Years Ended December 31,
202420232022
Interest Income$19,223 $13,597 $6,031 
Royalty Income - Non-Operated Coal18,379 8,855 10,258 
Contract Assessments15,000 16,350 — 
Rental Income1,916 2,129 2,239 
Other26,154 12,330 5,826 
Miscellaneous Other Income$80,672 $53,261 $24,354 
Interest income increased primarily due to the Company's investment in marketable debt securities, comprised of highly liquid U.S. Treasury securities.
Royalty income increased as a result of additional leased coal volumes related to overriding royalty agreements or coal reserve leases between the Company and third-party operators.
Contract assessment income includes penalties and fees levied against customers that did not meet the purchase obligations under their contracts with the Company. This amount also includes partial contract buyouts that involved negotiations with customers to reduce coal quantities that they otherwise were obligated to purchase under contracts in exchange for payment of certain fees to the Company, and did not impact forward contract terms.
Other income increased primarily due to additional investments in December 2023 in coal-to-product businesses led by CONSOL Innovations LLC, our wholly-owned subsidiary, as well as advancements from the Company's insurance carriers related to a claim filed as a result of the Francis Scott Key Bridge collapse on March 26, 2024, which restricted vessel access to, and export capability from, the CONSOL Marine Terminal.