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Fair Value Disclosure
9 Months Ended
Sep. 30, 2020
Fair Value Disclosures [Abstract]  
Fair Value Disclosure Fair Value Disclosure
Recurring Fair Value Measurements: The following table presents the Company's assets and liabilities accounted for at fair value on a recurring basis:
Fair Value Measurements at Reporting Date Using
Quoted Prices inSignificant
Active Markets forSignificant OtherUnobservable
Identical AssetsObservable InputsInputs
DescriptionDate(Level 1)(Level 2)(Level 3)
September 30, 2020
Assets:
Equity securities$12,238 $12,238 $— $— 
$12,238 $12,238 $— $— 
December 31, 2019
Assets:
Equity securities$10,120 $10,120 $— $— 
$10,120 $10,120 $— $— 

Bellaire Corporation (“Bellaire”) is a non-operating subsidiary of the Company with legacy liabilities relating to closed mining operations, primarily former Eastern U.S. underground coal mining operations. Prior to 2019, Bellaire established a $5.0 million mine water treatment trust (the "Mine Water Treatment Trust") to provide a financial assurance mechanism to assure the long-term treatment of post-mining discharge. Bellaire's Mine Water Treatment Trust invests in equity securities that are reported at fair value based upon quoted market prices in active markets for identical assets; therefore, they are classified as Level 1 within the fair value hierarchy. The Company recognized a gain of $0.5 million and $0.4 million in the three and nine months ended September 30, 2020, respectively, and a gain of $0.1 million and $1.1 million in the three and nine months ended September 30, 2019, respectively, related to the Mine Water Treatment Trust.

During the second quarter of 2020, the Company invested $2.0 million in equity securities of a public company with a diversified portfolio of royalty producing mineral interests. The investment is reported at fair value based upon quoted market prices in active markets for identical assets; therefore, it is classified as Level 1 within the fair value hierarchy. The Company recognized a loss of $0.5 million and $0.1 million in the three and nine months ended September 30, 2020, respectively, related to the investment in these equity securities.
The gains and losses related to equity securities are reported on the line Gain on equity securities in the Other (income) expense section of the Unaudited Condensed Consolidated Statements of Operations.

There were no transfers into or out of Levels 1, 2 or 3 during the three and nine months ended September 30, 2020 and 2019.