4. Real Estate Assets and Construction in Progress

The following is a summary of properties owned or leased by the Company as of September 30, 2018 and December 31, 2017 (in thousands):

As of September 30, 2018 (unaudited):


			Buildings,
			Improvements		Construction
Property Location	Land		and Equipment		in Progress		Total Cost
Atlanta, Georgia (Atlanta-Metro)	$	20,416	$	492,825	$	9,702	$	522,943
Irving, Texas		8,606		326,900		109,431		444,937
Richmond, Virginia		2,180		252,549		67,021		321,750
Chicago, Illinois		9,400		114,981		138,140		262,521
Suwanee, Georgia (Atlanta-Suwanee)		3,521		163,828		4,586		171,935
Ashburn, Virginia (1)		17,326		63,197		163,296		243,819
Piscataway, New Jersey		7,466		92,052		36,470		135,988
Santa Clara, California (2)		—		98,089		7,583		105,672
Dulles, Virginia		3,154		71,893		4,145		79,192
Sacramento, California		1,481		64,772		110		66,363
Leased Facilities (3)		—		52,505		8,965		61,470
Fort Worth, Texas		9,078		18,437		38,909		66,424
Princeton, New Jersey		20,700		33,776		478		54,954
Phoenix, Arizona (1)		—		—		29,162		29,162
Hillsboro, Oregon (1)		—		—		35,867		35,867
Manassas, Virginia (1)		—		—		77,529		77,529
Other (4)		2,213		35,586		266		38,065
	$	105,541	$	1,881,390	$	731,660	$	2,718,591

(1)

Represent land purchases. Land acquisition costs, as well as subsequent development costs, are included within construction in progress until development on the land has ended and the asset is ready for its intended use.

(2)

Owned facility subject to long-term ground sublease.

(3)

Includes 11 facilities. All facilities are leased, including those subject to capital leases.

(4)

Consists of Miami, FL; Lenexa, KS; and Overland Park, KS facilities.

As of December 31, 2017:


			Buildings,
			Improvements		Construction
Property Location	Land		and Equipment		in Progress		Total Cost
Atlanta, Georgia (Atlanta-Metro)	$	20,416	$	452,836	$	28,614	$	501,866
Irving, Texas		8,606		276,894		86,320		371,820
Richmond, Virginia		2,180		254,603		61,888		318,671
Chicago, Illinois		9,400		81,463		135,479		226,342
Suwanee, Georgia (Atlanta-Suwanee)		3,521		165,915		3,620		173,056
Ashburn, Virginia (1)		—		—		106,952		106,952
Piscataway, New Jersey		7,466		83,251		37,807		128,524
Santa Clara, California (2)		—		100,028		6,989		107,017
Dulles, Virginia		3,154		76,239		3,565		82,958
Sacramento, California		1,481		64,251		58		65,790
Leased Facilities (3)		—		59,460		5,534		64,994
Fort Worth, Texas		9,079		17,894		33,774		60,747
Princeton, New Jersey		20,700		32,948		451		54,099
Phoenix, Arizona (1)		—		—		27,402		27,402
Hillsboro, Oregon (1)		—		—		29,278		29,278
Other (4)		2,213		35,505		88		37,806
	$	88,216	$	1,701,287	$	567,819	$	2,357,322

(1)

(2)

Owned facility subject to long-term ground sublease.

(3)

Includes 11 facilities. All facilities are leased, including those subject to capital leases.

(4)

Consists of Miami, FL; Lenexa, KS; Overland Park, KS; and Duluth, GA facilities.