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, 2017
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  
New Development and Redevelopment Obligations    
Tax incremental financing obligation    
Purchase obligations 128,000,000  
Capital Expenditures For Operating Properties    
Tax incremental financing obligation    
Purchase obligations 51,800,000  
Third Party Construction and Development    
Tax incremental financing obligation    
Purchase obligations 6,700,000  
Other Obligations    
Tax incremental financing obligation    
Purchase obligations 1,400,000  
Specialty Tax Guarantee    
Tax incremental financing obligation    
Liability recognized with regard to tax incremental financing obligation at end of current period $ 1,500,000  
Specialty Tax Guarantee | Anne Arundel County, Maryland | Tax Incremental Financing Bond    
Loss Contingencies [Line Items]    
Loan amount   $ 30,000,000