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Equity Method Investment (Tables)
6 Months Ended
Jun. 30, 2022
Equity Method Investments and Joint Ventures [Abstract]  
Marketable Securities Summarized financial information for NMRD is as follows:
Results of Operations
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
(In thousands)
Operating revenues
$4,021 $3,885 $6,817 $6,635 
Operating expenses2,387 2,416 4,791 4,938 
Net earnings
$1,634 $1,469 $2,026 $1,697 

Financial Position
June 30,December 31,
20222021
(In thousands)
Current assets$9,065 $10,729 
Net property, plant, and equipment163,006 166,495 
Non-current assets9,676 2,289 
Total assets
181,747 179,513 
Current liabilities1,045 824 
Non-current liabilities380 373 
Owners’ equity
$180,322 $178,316