Real Estate Assets and Construction in Progress (Details) $ in Thousands	Sep. 30, 2020 USD ($) facility	Dec. 31, 2019 USD ($) facility
Real Estate Properties [Line Items]
Land	$ 164,816	$ 130,605
Buildings, Improvements and Equipment	2,681,827	2,178,901
Construction in progress	957,592	920,922
Owned Properties
Real Estate Properties [Line Items]
Land	164,816	130,605
Buildings, Improvements and Equipment	2,681,827	2,178,901
Construction in progress	957,592	920,922
Total cost	3,804,235	3,230,428
Owned Properties | Atlanta, Georgia Campus
Real Estate Properties [Line Items]
Land	55,157	44,588
Buildings, Improvements and Equipment	637,590	525,300
Construction in progress	214,778	128,930
Total cost	907,525	698,818
Owned Properties | Irving, Texas
Real Estate Properties [Line Items]
Land	8,606	8,606
Buildings, Improvements and Equipment	390,777	369,727
Construction in progress	95,957	98,170
Total cost	495,340	476,503
Owned Properties | Ashburn, Virginia Campus
Real Estate Properties [Line Items]
Land	16,475	16,476
Buildings, Improvements and Equipment	354,069	156,396
Construction in progress	119,378	189,375
Total cost	489,922	362,247
Owned Properties | Richmond, Virginia
Real Estate Properties [Line Items]
Land	2,180	2,180
Buildings, Improvements and Equipment	197,573	195,684
Construction in progress	149,235	139,948
Total cost	348,988	337,812
Owned Properties | Chicago, Illinois
Real Estate Properties [Line Items]
Land	9,400	9,400
Buildings, Improvements and Equipment	238,973	205,026
Construction in progress	91,523	86,878
Total cost	339,896	301,304
Owned Properties | Suwanee, Georgia (Atlanta-Suwanee)
Real Estate Properties [Line Items]
Land	3,521	3,521
Buildings, Improvements and Equipment	183,021	174,124
Construction in progress	4,565	5,559
Total cost	191,107	183,204
Owned Properties | Piscataway, New Jersey
Real Estate Properties [Line Items]
Land	7,466	7,466
Buildings, Improvements and Equipment	115,522	103,553
Construction in progress	34,372	36,056
Total cost	157,360	147,075
Owned Properties | Fort Worth, Texas
Real Estate Properties [Line Items]
Land	9,079	9,079
Buildings, Improvements and Equipment	120,419	55,018
Construction in progress	2,708	35,722
Total cost	132,206	99,819
Owned Properties | Hillsboro, Oregon
Real Estate Properties [Line Items]
Land	18,414	0
Buildings, Improvements and Equipment	21,167	0
Construction in progress	84,009	63,573
Total cost	123,590	63,573
Owned Properties | Santa Clara, California
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	116,829	114,499
Construction in progress	1,511	1,238
Total cost	118,340	115,737
Owned Properties | Sacramento, California
Real Estate Properties [Line Items]
Land	1,481	1,481
Buildings, Improvements and Equipment	65,990	65,258
Construction in progress	193	163
Total cost	67,664	66,902
Owned Properties | Eemshaven, Netherlands
Real Estate Properties [Line Items]
Land	5,150	0
Buildings, Improvements and Equipment	20,826	0
Construction in progress	40,899	37,267
Total cost	66,875	37,267
Owned Properties | Dulles, Virginia
Real Estate Properties [Line Items]
Land	3,154	3,154
Buildings, Improvements and Equipment	52,283	48,651
Construction in progress	5,351	4,688
Total cost	60,788	56,493
Owned Properties | Manassas, Virginia
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	0	0
Construction in progress	59,645	57,662
Total cost	59,645	57,662
Owned Properties | Princeton, New Jersey
Real Estate Properties [Line Items]
Land	20,700	20,700
Buildings, Improvements and Equipment	35,227	35,192
Construction in progress	73	39
Total cost	56,000	55,931
Owned Properties | Phoenix, Arizona
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	0	0
Construction in progress	33,282	31,265
Total cost	33,282	31,265
Owned Properties | Groningen, Netherlands
Real Estate Properties [Line Items]
Land	1,820	1,741
Buildings, Improvements and Equipment	10,290	9,085
Construction in progress	3,572	3,028
Total cost	15,682	13,854
Owned Properties | Other
Real Estate Properties [Line Items]
Land	2,213	2,213
Buildings, Improvements and Equipment	36,493	36,163
Construction in progress	12,451	120
Total cost	51,157	38,496
Leased Properties
Real Estate Properties [Line Items]
Land	0	0
Buildings, Improvements and Equipment	84,778	85,225
Construction in progress	4,090	1,241
Total cost	$ 88,868	$ 86,466
Number of facilities leased | facility	7	7