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	Jun. 30, 2015
Business Acquisition [Line Items]
Land				$ 1,130
Buildings and improvements				79,372
Construction in process				12,127
Acquired intangibles, net	[1]			89,847
Net working capital				2,569
Total identifiable assets acquired				185,045
Capital lease and lease financing obligations				43,832
Deferred income taxes				19,766
Total liabilities assumed				63,598
Net identifiable assets acquired				121,447
Goodwill		$ 171,679	$ 181,738	173,237
Net assets acquired				$ 294,684
Acquired intangible asset adjustment		14,700
Adjustment [Member]
Business Acquisition [Line Items]
Buildings and improvements		(474)
Acquired intangibles, net	[1]	18,253
Net working capital		1,270
Total identifiable assets acquired		19,049
Deferred income taxes		15,038
Aquired above market lease		2,453
Total liabilities assumed		17,491
Net identifiable assets acquired		1,558
Goodwill		(1,558)
Carpathia Hosting, Inc. [Member]
Business Acquisition [Line Items]
Land		1,130
Buildings and improvements		78,898
Construction in process		12,127
Acquired intangibles, net	[1]	108,100
Net working capital		3,839
Total identifiable assets acquired		204,094
Capital lease and lease financing obligations		43,832
Deferred income taxes		34,804
Aquired above market lease		2,453
Total liabilities assumed		81,089
Net identifiable assets acquired		123,005
Goodwill		171,679
Net assets acquired		294,684
Fair value adjustment		3,600
Acquired intangible asset adjustment		14,700
Tenant Relationship [Member]
Business Acquisition [Line Items]
Amortization adjustment		(1,000)	(700)
Tenant Relationship [Member] | Carpathia Hosting, Inc. [Member]
Business Acquisition [Line Items]
Amortization adjustment		$ (1,000)	$ (700)

[1] In addition to $3.6 million of prior period fair value adjustments, during the three months ended March 31, 2016, a $14.7 million adjustment was recorded to increase acquired intangible assets following identified purchase price allocation adjustments, with a corresponding decrease to goodwill. An adjustment of $1.0 million to increase amortization expense related to this increase in acquired intangibles was recorded during the three months ended March 31, 2016, of which $0.7 million related to prior reporting periods.