Equity Method Investment (Tables)

9 Months Ended

Sep. 30, 2020

Equity Method Investments and Joint Ventures [Abstract]

Marketable Securities

Summarized financial information for NMRD is as follows:

	Results of Operations
	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
	(In thousands)
Operating revenues	$	3,462	$	892	$	7,769	$	2,720
Operating expenses	2,100		730		5,152		2,181
Net earnings	$	1,362	$	162	$	2,617	$	539

	Financial Position
	September 30,		December 31,
	2020		2019
	(In thousands)
Current assets	$	6,527	$	7,187
Net property, plant, and equipment	173,952		132,772
Non-current assets	1,969		—
Total assets	182,448		139,959
Current liabilities	1,059		9,640
Non-current liabilities	351		—
Owners’ equity	$	181,038	$	130,319