SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]

Schedule III Real Estate and Accumulated Depreciation

					Initial Cost to Company								Cost Amount Carried at Close of Period
Property	City	State	Encumbrances(1)		Land		Buildings and Improvements		Costs Capitalized Subsequent to Acquisition, Net		Impairment/Write Downs		Land		Buildings and Improvements		Total(2)		Accumulated Depreciation(3)		Date Acquired	Original Construction Date
1225 Seventeenth Street	Denver	CO	$	—	$	22,400	$	110,090	$	35,357	$	(2,751)	$	22,400	$	142,696	$	165,096	$	40,542	6/24/2009	1982
1250 H Street, NW	Washington	DC	—		5,975		53,778		16,646		(719)		5,975		69,705		75,680		35,902		6/23/1998	1992
Georgetown-Green and Harris Buildings	Washington	DC	—		24,000		35,979		2,319		—		24,000		38,298		62,298		9,408		9/3/2009	1960;1975
109 Brookline Avenue	Boston	MA	—		3,168		30,397		19,149		(1,397)		3,168		48,149		51,317		23,248		9/28/1995	1915
206 East 9th Street	Austin	TX	25,433		7,900		38,533		5,996		(655)		7,900		43,874		51,774		8,560		5/31/2012	1984
Bridgepoint Square	Austin	TX	—		7,784		70,526		25,382		(1,323)		7,784		94,585		102,369		48,381		12/5/1997	1986;1996; 1997
333 108th Avenue NE	Bellevue	WA	—		14,400		136,412		2,808		(33)		14,400		139,187		153,587		36,659		11/12/2009	2008
			$	25,433	$	85,627	$	475,715	$	107,657	$	(6,878)	$	85,627	$	576,494	$	662,121	$	202,700

Analysis of the carrying amount of real estate properties and accumulated depreciation:

	Real Estate Properties		Accumulated Depreciation
Balance at January 1, 2017	$	2,856,890	$	755,255
Additions	55,041		71,979
Loss on asset impairment	(6,711)		—
Properties classified to held for sale	(138,130)		(62,064)
Disposals	(1,019,479)		(314,452)
Balance at December 31, 2017	1,747,611		450,718
Additions	58,618		39,161
Loss on asset impairment	(12,032)		—
Disposals	(654,555)		(113,911)
Balance at December 31, 2018	1,139,642		375,968
Additions	13,895		22,697
Disposals	(491,416)		(195,965)
Balance at December 31, 2019	$	662,121	$	202,700

(1)Excludes net unamortized premiums and net unamortized deferred financing costs.

(2)Excludes value of real estate intangibles. Aggregate cost for federal income tax purposes is approximately $659,483.

(3)Depreciation is calculated using the straight line method over estimated useful lives of up to 40 years for buildings and improvements and up to 12 years for personal property.