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Commitments and Contingencies (Details) (USD $) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2010 | Dec. 31, 2011 Y lease 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 |  | 4,400,000
Ground Leases |  |
Number of ground leases under which the entity is obligated as lessee |  | 2
Increments for future minimum rent increases between 2020 and 2100 (in years) |  | 10
Future minimum rental payments due: |  |
2012 |  | 483,000
2013 |  | 483,000
2014 |  | 483,000
2015 |  | 483,000
2016 |  | 483,000
Thereafter |  | 61,789,000
Total |  | 64,204,000
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
Length of environmental indemnification to the tenant against consequential damages at a building after the tenant's acquisition of the property (in years) |  | 15
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 |  | $ 65,000,000
Recovery percentage of amount paid under the guarantee when the entity continues to manage the properties |  | 20.00%
Recovery percentage of amount paid under the guarantee when the entity no longer manages the properties |  | 80.00%
Arundel Preserve 5, LLC, Date Acquired 7/2/2007 |  |
Joint Ventures |  |
Maximum amount of office space to be developed through the joint venture (in square feet) |  | 1,800,000
Land available to develop office space (in acres) |  | 63
Ownership (as a percent) |  | 50.00%

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- Definition Represents the maximum amount of environmental indemnification to the tenant against losses covered under an indemnity agreement of the prior owner of the property after the State of New Jersey declares the remediation complete. + References No definition available. + Details
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- Definition The bond amounts issued by Anne Arundel County, Maryland to third-party investors in order to finance public improvements needed in connection with National Business Park North. + References No definition available. + Details
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