Equity Method Investment (Tables)

3 Months Ended

Mar. 31, 2021

Equity Method Investments and Joint Ventures [Abstract]

Marketable Securities

Summarized financial information for NMRD is as follows:

	Results of Operations
	Three Months Ended March 31,
	2021		2020
	(In thousands)
Operating revenues	$	2,750	$	1,667
Operating expenses	2,522		1,580
Net earnings	$	228	$	87

	Financial Position
	March 31,		December 31,
	2021		2020
	(In thousands)
Current assets	$	5,005	$	8,046
Net property, plant, and equipment	170,032		172,585
Non-current assets	2,133		1,900
Total assets	177,170		182,531
Current liabilities	1,249		841
Non-current liabilities	383		380
Owners’ equity	$	175,538	$	181,310