Real Estate Assets and Construction in Progress (Details) $ in Thousands	Jun. 30, 2021 USD ($) facility	Dec. 31, 2020 USD ($) facility
Real Estate Properties [Line Items]
Land	$ 175,348	$ 165,109
Buildings, Improvements and Equipment	3,138,583	2,839,261
Construction in progress	$ 1,214,794	$ 1,028,765
Number of facilities leased | facility	6	7
Finance Leases
Real Estate Properties [Line Items]
Number of facilities leased | facility	1	1
Owned Properties
Real Estate Properties [Line Items]
Land	$ 175,348	$ 165,109
Buildings, Improvements and Equipment	3,138,583	2,839,261
Construction in progress	1,214,794	1,028,765
Total cost	4,528,725	4,033,135
Owned Properties | Ashburn, Virginia Campus
Real Estate Properties [Line Items]
Land	26,927	16,476
Buildings, Improvements and Equipment	428,817	371,725
Construction in progress	203,991	185,903
Total cost	659,735	574,104
Owned Properties | Atlanta, Georgia Campus
Real Estate Properties [Line Items]
Land	55,157	55,157
Buildings, Improvements and Equipment	826,547	700,142
Construction in progress	197,173	191,072
Total cost	1,078,877	946,371
Owned Properties | Chicago, Illinois
Real Estate Properties [Line Items]
Land	9,400	9,400
Buildings, Improvements and Equipment	286,030	250,336
Construction in progress	110,378	104,117
Total cost	405,808	363,853
Owned Properties | Dulles, Virginia
Real Estate Properties [Line Items]
Land	3,154	3,154
Buildings, Improvements and Equipment	55,749	54,323
Construction in progress	4,419	4,148
Total cost	63,322	61,625
Owned Properties | Eemshaven, Netherlands
Real Estate Properties [Line Items]
Land	5,209	5,366
Buildings, Improvements and Equipment	23,317	21,712
Construction in progress	48,588	47,531
Total cost	77,114	74,609
Owned Properties | Fort Worth, Texas
Real Estate Properties [Line Items]
Land	9,079	9,079
Buildings, Improvements and Equipment	128,910	124,054
Construction in progress	6,625	1,064
Total cost	144,614	134,197
Owned Properties | Groningen, Netherlands
Real Estate Properties [Line Items]
Land	1,841	1,896
Buildings, Improvements and Equipment	12,000	11,206
Construction in progress	3,440	3,730
Total cost	17,281	16,832
Owned Properties | Hillsboro, Oregon
Real Estate Properties [Line Items]
Land	18,414	18,414
Buildings, Improvements and Equipment	60,396	34,594
Construction in progress	67,626	78,390
Total cost	146,436	131,398
Owned Properties | Irving, Texas
Real Estate Properties [Line Items]
Land	8,606	8,606
Buildings, Improvements and Equipment	409,950	392,275
Construction in progress	97,797	99,591
Total cost	516,353	500,472
Owned Properties | Leased Facilities
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	83,363	82,759
Construction in progress	462	225
Total cost	83,825	82,984
Owned Properties | Manassas, Virginia
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	100	25
Construction in progress	143,778	67,073
Total cost	143,878	67,098
Owned Properties | Phoenix, Arizona
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	0	0
Construction in progress	49,111	37,729
Total cost	49,111	37,729
Owned Properties | Piscataway, New Jersey
Real Estate Properties [Line Items]
Land	7,466	7,466
Buildings, Improvements and Equipment	124,760	122,176
Construction in progress	55,878	30,401
Total cost	188,104	160,043
Owned Properties | Princeton, New Jersey
Real Estate Properties [Line Items]
Land	20,700	20,700
Buildings, Improvements and Equipment	35,297	35,261
Construction in progress	47	5
Total cost	56,044	55,966
Owned Properties | Richmond, Virginia
Real Estate Properties [Line Items]
Land	2,180	2,180
Buildings, Improvements and Equipment	238,323	233,927
Construction in progress	133,224	120,577
Total cost	373,727	356,684
Owned Properties | Sacramento, California
Real Estate Properties [Line Items]
Land	1,481	1,481
Buildings, Improvements and Equipment	66,756	66,300
Construction in progress	87	12
Total cost	68,324	67,793
Owned Properties | Santa Clara, California
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	133,418	117,343
Construction in progress	7,719	9,385
Total cost	141,137	126,728
Owned Properties | Suwanee, Georgia (Atlanta-Suwanee)
Real Estate Properties [Line Items]
Land	3,521	3,521
Buildings, Improvements and Equipment	186,378	184,467
Construction in progress	9,202	6,718
Total cost	199,101	194,706
Owned Properties | Other
Real Estate Properties [Line Items]
Land	2,213	2,213
Buildings, Improvements and Equipment	38,472	36,636
Construction in progress	75,249	41,094
Total cost	$ 115,934	$ 79,943