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Commitments and Contingencies
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Disclosure
Commitments and Contingencies
The Partnership has guaranteed the repayment of $32.9 million of economic development bonds issued by various municipalities in connection with certain commercial developments. We will be required to make payments under our guarantees to the extent that incremental taxes from specified developments are not sufficient to pay the bond debt service. Management does not believe that it is probable that we will be required to make any significant payments in satisfaction of these guarantees.
The Partnership also has guaranteed the repayment of an unsecured loan of one of our unconsolidated subsidiaries. At December 31, 2016, the maximum guarantee exposure for this loan was approximately $52.1 million.

We lease certain land positions with terms extending to March 2114, with a total future payment obligation of $311.1 million at December 31, 2016. No payments on these ground leases, which are classified as operating leases, are material in any individual year.

In addition to ground leases, we are party to other operating leases as part of conducting our business, including leases of office space from third parties, with a total future payment obligation of $43.4 million at December 31, 2016. No future payments on these leases are material in any individual year.

We are subject to various legal proceedings and claims that arise in the ordinary course of business. In the opinion of management, the amount of any ultimate liability with respect to these actions is not expected to materially affect our consolidated financial statements or results of operations. 

We own certain parcels of land that are subject to special property tax assessments levied by quasi municipal entities. To the extent that such special assessments are fixed and determinable, the discounted value of the full assessment is recorded as a liability. We have $10.2 million of such special assessment liabilities, which are included within other liabilities on our consolidated balance sheet as of December 31, 2016.