Equity Method Investment (Tables)

9 Months Ended

Sep. 30, 2021

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,
	2021		2020		2021		2020
	(In thousands)
Operating revenues	$	3,543	$	3,462	$	10,179	$	7,769
Operating expenses	2,422		2,100		7,360		5,152
Net earnings	$	1,121	$	1,362	$	2,819	$	2,617

	Financial Position
	September 30,		December 31,
	2021		2020
	(In thousands)
Current assets	$	9,164	$	8,046
Net property, plant, and equipment	168,053		172,585
Non-current assets	2,448		1,900
Total assets	179,665		182,531
Current liabilities	1,166		841
Non-current liabilities	370		380
Owners’ equity	$	178,129	$	181,310