Commitments and Contingencies - Narrative (Details)	Mar. 31, 2016 USD ($) Property	Aug. 31, 2010 USD ($)
Tax incremental financing obligation
Liability recognized with regard to tax incremental financing obligation at end of current period	$ 1,900,000
Environmental Indemnity Agreement
Number of lease properties which were provided environmental indemnifications | Property	3
Environmental indemnification to the tenant against losses covered under prior owner's indemnity agreement	$ 5,000,000
Maximum environmental indemnification to the tenant against consequential damages after acquisition of property	$ 12,500,000
Additional costs agreed to be paid by the entity related to construction and environmental regulatory activities (as a percent)	50.00%
Maximum annual additional costs agreed to be paid by the entity related to construction and environmental regulatory activities	$ 300,000
Maximum additional costs agreed to be paid by the entity related to construction and environmental regulatory activities	1,500,000
New Development and Redevelopment Obligations
Loss Contingencies [Line Items]
Purchase obligations	60,100,000
Capital Expenditures For Operating Properties
Loss Contingencies [Line Items]
Purchase obligations	44,900,000
Third Party Construction and Development
Loss Contingencies [Line Items]
Purchase obligations	17,700,000
Other Purchase Obligations
Loss Contingencies [Line Items]
Purchase obligations	$ 3,000,000
Anne Arundel County, Maryland | Tax Incremental Financing Bond
Tax incremental financing obligation
Debt instrument, face amount		$ 30,000,000