Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) (USD $)
 1 Months Ended
Aug. 31, 2010
Jun. 30, 2014
Property
Tax incremental financing obligation    
The amount of tax incremental financing bonds issued by Anne Arundel County, Maryland $ 30,000,000  
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   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
Nonrecourse loan guarantees of unconsolidated partnership
    
Joint Ventures    
Maximum approximate amount required to be paid under the guarantees for outstanding debt, excluding interest and penalties   $ 5,600,000