Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details)
Jun. 30, 2015
USD ($)
Property
Aug. 31, 2010
USD ($)
Tax incremental financing obligation    
Liability recognized with regard to tax incremental financing obligation at end of current period $ 2,400,000  
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 $ 5,000,000.0  
Maximum environmental indemnification to the tenant against consequential damages after acquisition of property $ 12,500,000.0  
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 $ 1,500,000.0  
Anne Arundel County, Maryland [Member] | Tax Incremental Financing Bond [Member]    
Tax incremental financing obligation    
Debt instrument, face amount   $ 30,000,000