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Commitments and Contingencies - Narrative (Details) | Jun. 30, 2016 USD ($) Property | Aug. 31, 2010 USD ($)
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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 | 78,800,000 |
Capital Expenditures For Operating Properties |  |
Loss Contingencies [Line Items] |  |
Purchase obligations | 48,700,000 |
Third Party Construction and Development |  |
Loss Contingencies [Line Items] |  |
Purchase obligations | 17,300,000 |
Other Purchase Obligations |  |
Loss Contingencies [Line Items] |  |
Purchase obligations | $ 2,500,000 |
Anne Arundel County, Maryland | Tax Incremental Financing Bond |  |
Tax incremental financing obligation |  |
Debt instrument, face amount |  | $ 30,000,000

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