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Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Other Income (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
MSHA reimbursement	$ 150	$ 150	$ 300	$ 653
Gain on sale of royalty interests in oil properties	449		2,949
Miscellaneous	730	244	2,192	439
Total Other Income	1,197	321	5,275	398
Savoy [Member]
Loss on disposal of equity method investment	(538)		(538)	(538)
Sunrise Energy [Member]
Equity income (loss)	$ (132)	$ (73)	$ (166)	$ (156)

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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