Acquisitions (Allocation of the Fair Value of Assets Acquired and Liabilities Assumed as of the Acquisition Date) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2014
Business Acquisition [Line Items]
Land		$ 3,030	$ 7,602		$ 17,976
Buildings, improvements and equipment		80,818	80,975		35,865
Construction in process		12,127	62,884		17,764
Deferred costs			4,414		$ 3,345
Other assets		633	309
Capital lease and lease financing obligations		43,832
Deferred income taxes		21,673	6,045
Goodwill		181,738	173,843
Amortization adjustment	$ 1,000	$ 700
Fort Worth Facility
Business Acquisition [Line Items]
Land			136
Buildings, improvements and equipment			610
Construction in process			48,984
Acquired intangibles			240
Deferred costs			23
Other assets			7
Net working capital			86
Net identifiable assets acquired			50,086
Piscataway Facility
Business Acquisition [Line Items]
Land			7,466
Buildings, improvements and equipment			80,366
Construction in process			13,900
Acquired intangibles			19,581
Deferred costs			4,390
Other assets			106
Total identifiable assets acquired			125,809
Aquired above market lease			809
Net working capital			2,019
Total liabilities assumed			2,828
Net identifiable assets acquired			$ 122,981
Piscataway Facility | Original Allocation Reported
Business Acquisition [Line Items]
Land				$ 7,440
Buildings, improvements and equipment				78,370
Construction in process				13,900
Acquired intangibles				21,668
Deferred costs				4,084
Other assets				106
Total identifiable assets acquired				125,568
Aquired above market lease				568
Net working capital				2,019
Total liabilities assumed				2,587
Net identifiable assets acquired				122,981
Piscataway Facility | Adjustment
Business Acquisition [Line Items]
Land				26
Buildings, improvements and equipment				1,996
Acquired intangibles				(2,087)
Deferred costs				306
Total identifiable assets acquired				241
Aquired above market lease				241
Total liabilities assumed				241
Carpathia Hosting, Inc.
Business Acquisition [Line Items]
Land				1,130
Buildings, improvements and equipment				78,898
Construction in process				12,127
Acquired intangibles				108,100
Net working capital				2,851
Total identifiable assets acquired				203,106
Capital lease and lease financing obligations				43,832
Deferred income taxes				35,980
Aquired above market lease				2,453
Total liabilities assumed				82,265
Net identifiable assets acquired				120,841
Goodwill				173,843
Net assets acquired				$ 294,684