Business Segments (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Business Segments (in thousands)

	Years Ended December 31,
	2020			2019			2018
Revenues:
Asset management	$	2,747			2,190			2,309
Mining royalty lands		9,477			9,438			8,139
Development		1,152			1,164			1,206
Stabilized Joint Venture		10,207			10,964			10,368
	$	23,583			23,756			22,022
Operating profit:
Before corporate expenses:
Asset management	$	907			196			1,051
Mining royalty lands		8,629			8,690			7,504
Development		(2,576	)		(2,817	)		(2,104	)
Stabilized Joint Venture		1,685			2,243			(537	)
Operating profit before corporate expenses		8,645			8,312			5,914
Corporate expenses:
Allocated to asset management		(909	)		(646	)		(153	)
Allocated to mining royalty lands		(288	)		(169	)		(214	)
Allocated to Development		(2,108	)		(1,581	)		(1,984	)
Allocated to Stabilized Joint Venture		(206	)		(160	)		(393	)
Unallocated		—			—			(1,208	)
		(3,511	)		(2,556	)		(3,952	)
	$	5,134			5,756			1,962
Interest expense	$	1,100			1,054			3,103
Depreciation, depletion and amortization:
Asset management	$	652			708			540
Mining royalty lands		218			177			198
Development		214			214			228
Stabilized Joint Venture		4,744			4,756			6,932
	$	5,828			5,855			7,898
Capital expenditures:
Asset management	$	924			9,487			335
Mining royalty lands		—			—			—
Development		16,547			631			6,396
Stabilized Joint Venture		73			316			563
	$	17,544			10,434			7,294
Identifiable net assets at end of period:
Asset management	$	11,172			18,468			10,593
Discontinued operations		—			—			3,224
Mining royalty lands		37,387			38,409			37,991
Development		196,212			179,357			119,029
Stabilized Joint Venture		130,472			133,956			138,206
Investments available for sale at fair value		75,609			137,867			165,212
Cash items		74,105			26,793			22,749
Unallocated corporate assets		11,403			3,298			8,484
	$	536,360			538,148			505,488