Business Segments (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Business segments (in thousands)

	Three Months ended						Nine Months ended
	September 30,						September 30,
	2017			2016			2017			2016
Revenues:
Asset management	$	7,578			7,323			22,057			21,824
Mining royalty lands		1,786			2,037			5,381			5,874
Land development and construction		323			416			931			936
RiverFront on the Anacostia		2,367			—			2,367			—
		12,054			9,776			30,736			28,634
Operating profit:
Before corporate expenses:
Asset management	$	3,336			3,245			10,071			9,986
Mining royalty lands		1,667			1,915			4,993			5,504
Land development and construction		(390	)		(196	)		(1,168	)		(3,359	)
RiverFront on the Anacostia		(1,168	)		—			(1,168	)		—
Corporate expenses:
Allocated to asset management		(350	)		(339	)		(1,424	)		(1,213	)
Allocated to mining royalty lands		(30	)		(49	)		(124	)		(176	)
Allocated to land development and construction		(210	)		(268	)		(935	)		(959	)
Allocated to RiverFront on the Anacostia		(27	)		—			(27	)		—
		(617	)		(656	)		(2,510	)		(2,348	)
	$	2,828			4,308			10,218			9,783
Interest expense:
Asset management	$	374			273			993			1,080
RiverFront on the Anacostia		877			—			877			—
	$	1,251			273			1,870			1,080
Depreciation, depletion and amortization:
Asset management	$	2,090			2,071			6,112			5,891
Mining royalty lands		17			24			91			70
Land development and construction		98			65			263			194
RiverFront on the Anacostia		2,564			—			2,564			—
	$	4,769			2,160			9,030			6,155
Capital expenditures:
Asset management	$	1,273			10,276			6,061			11,510
Mining royalty lands		—			99			—			205
Land development and construction		2,852			4,210			6,203			5,300
RiverFront on the Anacostia		331			—			331			—
	$	4,456			14,585			12,595			17,015

	September 30,		December 31,
Identifiable net assets	2017		2016
Asset management	$	180,827		169,736
Mining royalty lands		38,744		39,259
Land development and construction		44,162		57,126
RiverFront on the Anacostia		146,718		—
Cash items		2,630		—
Unallocated corporate assets		3,011		439
	$	416,092		266,560