Significant Accounting Policies - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) segment	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Percentage of lease term			75.00%
Percentage of lease payment			90.00%
Asset impairments and loss on disposal	$ 0	$ 4,900,000	$ 0	$ 13,500,000
Impairment of goodwill	0	0	0	0
Deferred leasing costs	22,100,000		22,100,000		$ 14,200,000
Deferred revenue	72,500,000		72,500,000		$ 78,700,000
Depreciation	44,200,000	32,100,000	115,500,000	84,800,000
Amortization	6,400,000	$ 7,000,000	19,100,000	16,800,000
Unrecognized tax benefits	$ 0		$ 0
Number of segments | segment			1
Leasehold Improvements
Summary Of Significant Accounting Policies [Line Items]
Weighted-average remaining life (in years)			51 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Receivables due term			30 days
Minimum | Customer Relationships And Trademark
Summary Of Significant Accounting Policies [Line Items]
Weighted-average remaining life (in years)			10 years
Minimum | Deferred Leasing Costs
Summary Of Significant Accounting Policies [Line Items]
Weighted-average remaining life (in years)			3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Receivables due term			120 days
Maximum | Customer Relationships And Trademark
Summary Of Significant Accounting Policies [Line Items]
Weighted-average remaining life (in years)			13 years
Maximum | Deferred Leasing Costs
Summary Of Significant Accounting Policies [Line Items]
Weighted-average remaining life (in years)			5 years
Austin I
Summary Of Significant Accounting Policies [Line Items]
Asset impairments and loss on disposal				$ 9,200,000
Buildings | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful life			9 years
Buildings | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful life			30 years
Building Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful life			3 years
Building Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful life			30 years
Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful life			3 years
Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful life			20 years