Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Narrative (Details)

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Commitments and Contingencies - Narrative (Details)
Mar. 31, 2019
USD ($)
Property
Aug. 31, 2010
USD ($)
Environmental Indemnity Agreement    
Number of properties which were provided environmental indemnifications | Property 3  
Maximum additional costs agreed to be paid by the entity under environmental indemnification agreement $ 19,000,000  
Development and Redevelopment Obligations    
Environmental Indemnity Agreement    
Purchase obligations 184,300,000  
Tenant and Other Capital Improvements    
Environmental Indemnity Agreement    
Purchase obligations 45,300,000  
Third Party Construction    
Environmental Indemnity Agreement    
Purchase obligations 32,600,000  
Other Obligations    
Environmental Indemnity Agreement    
Purchase obligations $ 1,700,000  
Specialty Tax Guarantee | Anne Arundel County, Maryland | Tax Incremental Financing Bond    
Environmental Indemnity Agreement    
Loan amount   $ 30,000,000