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USD ($)

USD ($) / shares

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margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;margin-left:0px;"&gt;2.          &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;"&gt;Summary of Significant Accounting Policies:&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Basis of Presentation and Consolidation.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;The accompanying consolidated financial statements are presented in our reporting currency, the U.S.&amp;#160;dollar. All material intercompany transactions with consolidated entities have been eliminated.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We consolidate all entities that are wholly owned and those in which we own less than 100% but control, as well as any variable interest entities in which we are the primary beneficiary. We evaluate our ability to control an entity and whether the entity is a variable interest entity&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;(&amp;#8220;VIE&amp;#8221;) &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;and we are the &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;primary beneficiary through &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;consideration &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;of subst&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;antive terms of the arrangement&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; to identify which enterprise has the power to direct the activities of a &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;VIE &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;that most significantly impacts the entity's economic performance and the obligation to absorb losses of the entity or the right to receive benefits from the entity.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Adjustments and Reclassifications.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;Certain amounts included in the accompanying consolidated financial statements for 2009 and 2008 have been reclassified to conform to the 2010 financial statement&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;s presentation. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;We reclassified certain balance sheet accounts (&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Investments In and Advances to Unconsolidated Investees&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;,&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt; Notes&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Receivable Backed by Real Estate&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;, and &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Assets Held for Sale&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;) under &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Net Investment&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;s&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt; in Real Estate&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt; &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;to more appropriately reflect the underlying substance of the assets&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;We reclassified &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;$88.5 million from&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Accounts Payable and Accrued Expenses&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; and &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;$45.2 million from &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Accounts and Notes Receivable&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; into &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Real Estate, Other Investments &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;in our December 31, 2009 balance sheet due to the right of offset between asset and liability accounts associated with a substantial development project in the United Kingdom. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;We have evaluated all subsequent events for adjustment to or disclosure in these financial statements through the issuance of these financial statements.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Use of Estimates.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;The accompanying consolidated financial statements are prepared in accordance with &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;U.S.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;generally accepted accounting principles (&amp;#8220;GAAP&amp;#8221;). GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities as of the date of the financial statements, and revenue and expenses during the reporting period. Our actual results could differ from those estimates and assumptions. Although we believe the assumptions and estimates we made are reasonable and appropriate, as discussed in the applicable sections throughout these Consolidated Financial Statements, different assumptions and estimates could materially impact our reported results. The current economic environment has increased the degree of uncertainty inherent in these estimates and assumptions and changes in market conditions could impact our future operating results.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Foreign Operations.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;The U.S.&amp;#160;dollar is the functional currency for our consolidated subsidiaries and unconsolidated investees operating in the &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;United States&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; and &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;Mexico&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; and certain of our consolidated subsidiaries that operate as holding companies for foreign investments. The functional currency for our consolidated subsidiaries and unconsolidated investees operating in countries other than the United States and Mexico is the principal currency in which the entity's assets, liabilities, income and expenses are denominated, which may be different from the local currency of the country of incorporation or the country where the entity conducts its operations.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;The functional currencies of our consolidated subsidiaries and unconsolidated investees generally include the British pound sterling, Canadian dollar, euro, Japanese yen and Korean won. The Chinese re&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;nmin&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;bi was also a functional currency through February 2009 and is included in discontinued operations. We are parties to business transactions denominated in these and other currencies.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;For our consolidated subsidiaries whose functional currency is not the U.S.&amp;#160;dollar, we translate their financial statements into U.S.&amp;#160;dollars at the time we consolidate those subsidiaries' financial statements. Generally, assets and liabilities are translated at the exchange rate in effect as of the balance sheet date. The resulting translation adjustments are included in the &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Accumulated Other Comprehensive Income (Loss)&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; in ProLogis Shareholders' Equity. Certain balance sheet items, primarily equity-related accounts, are reflected at the historical exchange rate. Income statement accounts are translated using the average exchange rate for the period and income statement accounts that represent significant non-recurring transactions are translated at the rate in effect as of the date of the transaction. We translate our share of the net earnings or losses of our unconsolidated investees whose functional currency is not the U.S.&amp;#160;dollar at the average exchange rate for the period.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We and certain of our consolidated subsidiaries have intercompany and third party debt that is not denominated in the entity's functional currency. When the debt is remeasured against the functional currency of the entity, a gain or loss can result. The resulting adjustment is generally reflected in results of operations, unless it is intercompany debt that is deemed to be long-term in nature. The remeasurement of such long-term debt results in the recognition of a cumulative translation adjustment in &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Accumulated Other Comprehensive Income (Loss)&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; in ProLogis Shareholders' Equity.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;Gains or losses are included in results of operations when transactions with a third party, denominated in a currency other than the entity's functional currency, are settled.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We are subject to foreign currency risk due to potential fluctuations in exchange rates between certain foreign currencies and the U.S.&amp;#160;dollar. A significant change in the value of the foreign currency of one or more countries where we have a significant investment would have an effect on our reported results of operations and financial position. Although we attempt to mitigate adverse effects by borrowing under debt agreements denominated in the same functional currency as the investment and, on occasion and when deemed appropriate, through the use of derivative contracts, there can be no assurance that those attempts to mitigate foreign currency risk will be successful.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;See our policy footnote on financial instruments and &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;Note 18&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; for more information related to our derivative financial instruments.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Business Combinations.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;In December 2007, the Financial Standards Accounting Board (&amp;#8220;FASB&amp;#8221;) issued a new accounting standard for business combinations that we adopted January&amp;#160;1, 2009. This accounting standard requires most identifiable assets, liabilities, noncontrolling interests, and goodwill acquired in a business combination to be recorded at &amp;#8220;full fair value&amp;#8221;. This accounting standard broadened the scope of what qualifies as a business combination to include the acquisition of an operating property by us and our unconsolidated investees. Transaction costs related to the acquisition of a business that were previously capitalized are expensed under this standard. The transaction costs related to the acquisition of land and equity method investments continue to be capitalized. This accounting standard requires subsequent adjustments of tax uncertainties that occur after the purchase price allocation period to be recognized in earnings. Previously, these adjustments were recognized in the purchase price as an adjustment to goodwill. The initial adoption of this accounting standard did not have a material impact on our financial position or results of operations, although it may have a more significant impact in the future depending on our acquisition activity.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;When we acquire a business or individual operating properties, with the intention to hold the investment for the long-term&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;, &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;we allocate the purchase price to the various components of the acquisition based upon the fair value of each component. We estimate the following:&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;the fair value of the buildings as if vacant;&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;The fair value allocated to land is generally based on relevant market data.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;the market value of above and below market leases based upon our best estimate of current market rents;&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;The value of each lease is recorded in either other assets or other liabilities, as appropriate.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;the value of costs to obtain tenants, primarily leasing commissions;&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;These costs are recorded in other assets.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;the value of debt based on quoted market rates for the same or similar issues, or by discounting future cash flows using rates currently available for debt with similar terms and maturities;&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;Any discount or premium is included in the principal amount.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;the value of any management contracts by discounting future expected cash flows under these contracts; and&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;These contracts are recorded in other assets.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;the value of all other assumed assets and liabilities based on the best information available.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We amortize the acquired assets or liabilities as follows: &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;&amp;#8226;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Above and below market leases are charged to rental income over the average remaining estimated life of the lease.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;&amp;#8226;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Leasing commissions are charged to amortization expense over the average remaining estimated life of the lease.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;&amp;#8226;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Debt discount or premium is charged to interest expense using the effective interest method over the remaining term of the related debt.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;&amp;#8226;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Management contracts are charged against income over the remaining term of the contract.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination. A gain may be recognized to the extent the purchase price is less than the fair value of net tangible and intangible assets acquired.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Long-Lived Assets&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;"&gt;.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;margin-left:0px;"&gt;Real Estate Assets.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;Real estate assets are carried at depreciated cost. Costs incurred that are directly associated with the successful acquisition of real estate assets were capitalized as part of the investment basis of the real estate assets through December&amp;#160;31, 2008. Beginning January&amp;#160;1, 2009, these costs are now expensed as discussed above, other than as they relate to the acquisition of land. Costs incurred in developing, renovating, rehabilitating and improving real estate assets are capitalized as part of the investment basis of the real estate assets. Costs incurred in making repairs and maintaining real estate assets are expensed as incurred.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;During the land development and construction periods of qualifying projects, we capitalize interest costs, insurance, real estate taxes and general and administrative costs of the personnel performing the development, renovation, &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;and &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;rehab&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;ilitation&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;; if such costs are incremental and identifiable to a specific activity&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; to get the asset ready for its intended use&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;. Capitalized costs are included in the investment basis of re&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;al estate assets. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; When a municipal district finances costs we incur for public infrastructure improvements, we record the costs in real estate until we are reimbursed.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; We also capitalize costs incurred to successfully originate a lease that results directly from and are essential to acquire that lease. Leasing costs that meet the requirements for capitalization are presented as a component of other assets.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;The depreciable portions of real estate assets are charged to depreciation expense on a straight-line basis over their respective estimated useful lives. Depreciation commences at the earlier of stabilization (defined as 93% occupied) or one year after completion of construction. We generally use the following useful lives: 5 to 7&amp;#160;years for capital improvements, 10&amp;#160;years for standard tenant improvements, 25&amp;#160;years for depreciable land improvements on developed buildings, 30&amp;#160;years for industrial properties acquired, 40&amp;#160;years for office and retail properties acquired and 40&amp;#160;years for properties we develop. Capitalized leasing costs are amortized over the respective lease term. Our average lease term for all leases in ef&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;fect at December 31, 2010 was &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;six years.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We assess the carrying values of our respective long-lived assets, whenever events or changes in circumstances indicate that the carrying amounts of these assets may not be fully recoverable. Recoverability of the assets is measured by comparison of the carrying amount of the asset to the estimated future undiscounted cash flows. In order to review our assets for recoverability, we consider current market conditions, as well as our intent with respect to holding or disposing of the asset. Fair value is determined through various valuation techniques; including discounted cash flow models; quoted market values; and third party appraisals, where considered necessary. If our analysis indicates that the carrying value of the long-lived asset is not recoverable on an undiscounted cash flow basis, we recognize an impairment charge for the amount by which the carrying value exceeds the current estimated fair value of the real estate property.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We estimate the future undiscounted cash flows based on our intent as follows: &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;(i)&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;for real estate properties that we intend to hold long-term, including land held for development, properties currently under development and operating buildings, recoverability is assessed based on the estimated future net rental income from operating the property;&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;(ii)&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;for land parcels we intend to sell, recoverability is assessed based on estimated fair value;&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;(iii)&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;for real estate properties currently under development and operating buildings we intend to sell, recoverability is assessed based on proceeds from disposition that are estimated based on future net rental income of the property and expected market capitalization rates;&amp;#160;and&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;(iv)&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;for costs incurred related to the potential acquisition of land or development of a real estate property, recoverability is assessed based on the probability that the acquisition or development is likely to occur as of the measurement date.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;The use of projected future cash flows is based on assumptions that are consistent with our estimates of future expectations and the strategic plan we use to manage our underlying business. However, assumptions and estimates about future cash flows, discount rates and capitalization rates are complex and subjective. Changes in economic and operating conditions and our ultimate investment intent that occur subsequent to our impairment analyses could impact these assumptions and result in future impairment of our real estate properties&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; or the recognition of a gain or loss at time of disposal&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;margin-left:0px;"&gt;Goodwill.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination. We perform an annual impairment test for goodwill at the reporting unit level. The annual review is performed during the fourth quarter for all our reporting units. Additionally, we evaluate the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amounts of goodwill may not be fully recoverable.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We use a two step approach to our goodwill impairment evaluation. The first step of the goodwill impairment test is used to identify whether there is any potential impairment. If the fair value of a reporting unit exceeds its corresponding book value, including goodwill, the goodwill of the reporting unit is not considered to be impaired and the second step of the impairment test is unnecessary. If the carrying amount of the reporting unit exceeds its fair value, the second step of the impairment test is performed. The second step requires that we compare the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill to measure the amount of impairment loss, if any.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;Generally, we use net asset value analyses to estimate the fair value of the reporting unit where the goodwill is allocated. We estimate the current fair value of the assets and liabilities in the reporting unit through various valuation techniques; including discounted cash flow models, applying a capitalization rate to estimated net operating income of a property, quoted market values and third-party appraisals, as considered necessary. The fair value of the reporting unit also includes an enterprise value premium that we estimate a third party would be willing to pay for the particular reporting unit. The use of projected future cash flows is based on assumptions that are consistent with our estimates of future expectations and the strategic plan we use to manage our underlying business. However, assumptions and estimates about future cash flows, discount rates and capitalization rates are complex and subjective. Changes in economic and operating conditions that occur subsequent to our impairment analyses could impact these assumptions and result in future impairment of our goodwill.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;margin-left:0px;"&gt;Assets Held for &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Sale&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt; and Discontinued Operations.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;Discontinued operations represent a component of an entity that has either been disposed of or is classified as held for sale if both the operations and cash flows of the component have been or will be eliminated from ongoing operations of the entity as a result of the disposal transaction and the entity will not have any significant continuing involvement in the operations of the component after the disposal transaction. The results of operations of a component of our business or properties that have been classified as discontinued operations are also reported as discontinued operations for all periods presented. We classify a component of our business or property as held for sale when certain criteria are met. At such time, the respective assets and liabilities are presented separately on our Consolidated Balance Sheets and depreciation is no longer recognized. Assets held for sale are reported at the lower of their carrying amount or their estimated fair value less the costs to sell the assets.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;Properties disposed of to third parties &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;or assets held for sale &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;are considered discontinued operations&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; Properties contributed to property funds in which we maintain an ownership interest, act as manager and account for the property fund under the equity method are not considered discontinued operations due to our continuing involvement with the properties.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Investments in Unconsolidated Investees.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;Our investments in certain entities are presented under the equity method. The equity method is used when we have the ability to exercise significant influence over operating and financial policies of the investee but do not have control of the investee. Under the equity method, these investments (including advances to the investee) are initially recognized in the balance sheet at our cost and are subsequently adjusted to reflect our proportionate share of net earnings or losses of the investee, distributions received, deferred gains from the contribution of properties and certain other adjustments, as appropriate. When circumstances indicate there may have been a reduction in the value of an equity investment, we evaluate the equity investment and any advances made for impairment by estimating our ability to recover our investment from future expected cash flows. If we determine the loss in value is other than temporary, we recognize an impairment charge to reflect the equity investment and any advances made at fair value.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Notes Receivable Backed by Real Estate.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;We ho&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;ld certain &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;investments in debt securities that are backed by&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; real estate&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; assets&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;. We regularly review the creditworthiness of the entities with which we hold the note agreements and reduce the notes receivable balance by estimating an allowance for amounts that may become uncollectible in the future. The notes are also evaluated individually for impairment. We consider a loan to be impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the agreement. &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Cash and Cash Equivalents.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;We consider all cash on hand, demand deposits with financial institutions, and short-term highly liquid investments with original maturities of three months or less to be cash equivalents. Our cash and cash equivalents are financial instruments that are exposed to concentrations of credit risk. We invest our cash with high-credit quality institutions. Cash balances may be invested in money market accounts that are not insured. We have not realized any losses in such cash investments or accounts and believe that we are not exposed to any significant credit risk.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Restricted Cas&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;"&gt;h&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;"&gt;.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;Restricted cash &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;consists of&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; escrows under secured loan agreements for taxes and insurance relating to the underlying collateral.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Convertible Debt.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;In May 2008, the FASB issued an accounting standard that required separate accounting for the debt and equity components of certain convertible&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; debt, such as the debt we &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;issued&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; in 2008 and 2007&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; We adopted this accounting standard on January 1, 2009 on a retroactive basis for convertible notes we issued in 2008 and 2007 as we have the ability to settle the conversion of the debt and conversion spread, at our option, in cash, common s&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;hares&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;, or a combination of cash and s&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;hares&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;. The 2010 convertible debt issuance requires us to settle the conversion by issuance of common shares&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; and therefore this standard does not apply to these notes&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;. &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;Under this standard, the liability and equity components of convertible debt are accounted for separately. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;The value assigned to the debt component is the estimated fair value at the date of issuance of a similar bond without the conversion feature, which results in the debt being recorded at a discount. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;The resulting debt discount is amortized over the estimated remaining life of the debt as additional non-cash interest expense. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;The carrying amount of the equity component is determined by deducting the fair value of the debt component from the initial proceeds of the convertible debt instrument as a whole&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;. &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top: 0pt; margin-bottom: 0pt;'&gt;&lt;/p&gt;&lt;p style='margin-top:12pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;See Note&amp;#160;9&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; for additional information on our convertible notes. &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Noncontrolling Interests.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;We recognize the noncontrolling interests in real estate partnerships &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;that&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; we consolidate using each noncontrolling holder's respective share of the estimated fair value of the real estate as of the date of formation. Noncontrolling interest that was created or assumed as a part of a business combination is recognized at fair value as of the date of the transaction. Noncontrolling interest is subsequently adjusted for additional contributions, distributions to noncontrolling holders and the noncontrolling holders' proportionate share of the net earnings or losses of each respective entity.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;Certain limited partnership interests issued by us in connection with the formation of a real estate partnership and as consideration in a business combination are exchangeable into our common shares. Common shares issued upon exchange of a holder's noncontrolling interest are accounted for at our carrying value of the surrendered noncontrolling interest.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Costs of Raising Capital.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;Costs incurred in connection with the issuance of both common shares and preferred shares are treated as a reduction to additional paid-in capital. Costs incurred in connection with the issuance or renewal of debt are capitalized in other assets, and amortized to interest expense over the term of the related debt.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Revenue Recognition.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;margin-left:0px;"&gt;Rental and other income.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;We lease our operating properties to customers under agreements that are classified as operating leases. We recognize the total minimum lease payments provided for under the leases on a straight-line basis over the lease term. Generally, under the terms of our leases, some or all of our rental expenses are recovered from our customers. We reflect amounts recovered from customers as a component of rental income. A provision for possible loss is made if the collection of a receivable balance is considered doubtful. Some of our retail and ground leases provide for additional rent based on sales over a stated base amount during the lease year. We recognize this additional rent when each customer's sales exceed their sales threshold. We recognize interest income and management, development and other fees and incentives when earned, fixed and determinable.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;margin-left:0px;"&gt;Gains on Disposition of Real Estate.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;Gains on the disposition of real estate are recorded when the recognition criteria have been met, generally at the time title is transferred, and we no longer have substantial continuing involvement with the real estate sold.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;When we contribute a property to a property fund or joint venture in which we have an ownership interest, we do not recognize a portion of the gain realized. If a loss is realized it is recognized when known. The amount of gain not recognized, based on our ownership interest in the entity acquiring the property, is deferred by recognizing a reduction to our investment in the applicable unconsolidated investee. We adjust our proportionate share of net earnings or losses recognized in future periods to reflect the investees' recorded depreciation expense as if it were computed on our lower basis in the contributed properties rather than on the entity's basis. Through 2008, we reflected the gains recognized from contributions of CDFS properties to property funds and joint ventures in operating cash flows. As a result of the cha&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;nges in our segments&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;, these gains are now included in investing activities.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;When a property that we originally contributed to a property fund or joint venture is disposed of to a third party, we recognize the amount of the gain we had previously deferred, along with our proportionate share of the gain recognized by the investee. During periods when our ownership interest in an investee decreases, we recognize gains relating to previously deferred gains to coincide with our new ownership interest in the investee.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Rental Expenses.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;Rental expenses primarily include the cost of on-site property management personnel, utilities, repairs and maintenance, property insurance and real estate taxes.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Investment Management Expenses.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;These costs include the property management expenses associated with the property-level management of the properties owned by our unconsolidated investees and the direct investment management expenses associated with the asset management of the property fu&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;nds&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Share-Based Compensation.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;We account for stock-based compensation by measuring the cost of employee services received in exchange for an award of an equity instrument based on the fair value of the award on the grant date. We recognize the cost over the period during which an employee is required to provide service in exchange for the award, generally the vesting period. We treat dividend equivalent units (&amp;#8220;DEUs&amp;#8221;) as dividends, which are charged to retained earnings and factored into the computation of the fair value of the underlying share &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;award at grant date. See Note&amp;#160;12&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; for more information on our &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;share &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;based compensation.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Income Taxes.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;ProLogis was formed as a Maryland REIT in January 1993 and we have, along with our consolidated REIT subsidiary, elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the &amp;#8220;Code&amp;#8221;). Under the Code, REITs are generally not required to pay federal income taxes if they distribute 100% of their taxable income and meet certain income, asset and shareholder tests. If we fail to qualify as a REIT in any taxable year, we will be subject to federal income taxes at regular corporate rates (including any alternative minimum tax) and may not be able to qualify as a REIT for the four subsequent taxable years. Even as a REIT, we may be subject to certain state and local taxes on our own income and property, and to federal income and excise taxes on our undistributed taxable income.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We have elected taxable REIT subsidiary (&amp;#8220;TRS&amp;#8221;) status for some of our consolidated subsidiaries. This allows us to provide services that would otherwise be considered impermissible for REITs. Many of the foreign countries in which we have operations do not recognize REITs or do not accord REIT status under their respective tax laws to our entities that operate in their jurisdiction. In the &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;United States&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;, we are taxed in certain states in which we operate. Accordingly, we recognize income tax expense for the federal and state income taxes incurred by our TRSs, taxes incurred in certain states and foreign jurisdictions, and interest and penalties associated with our unrecognized tax benefit liabilities.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;We evaluate tax positions taken in the financial statements on a quarterly basis under the interpretation for accounting for uncertainty in income taxes. As a result of this evaluation, we may recognize a tax benefit from an uncertain tax position only if it is &amp;#8220;more-likely-than-not&amp;#8221; that the tax position will be sustained on examination by taxing authorities. &lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;Deferred income taxes are recognized in certain taxable entities. Deferred income tax is generally a function of the period's temporary differences (items that are treated differently for tax purposes than for financial reporting purposes), the utilization of tax net operating losses generated in prior years that had been previously recognized as deferred income tax assets and deferred income tax liabilities related to indemnification agreements related to certain contributions to property funds. A valuation allowance for deferred income tax assets is provided if we believe all or some portion of the deferred income tax asset may not be realized. Any increase or decrease in the valuation allowance that results from a change in circumstances that causes a change in the estimated realizability of the related deferred income tax asset is included in d&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;eferred tax expense. See Note&amp;#160;15 &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;for further discussion of income taxes.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Financial Instruments.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;We may use certain types of derivative financial instruments for the purpose of managing certain foreign currency exchange rate and interest rate risk. We reflect our derivative financial instruments at fair value and record changes in the fair value of these derivatives each period in earnings, unless specific hedge accounting criteria are met. To qualify for hedge accounting treatment, generally the derivative instruments used for risk management purposes must effectively reduce the risk exposure that they are designed to hedge (primarily interest rate swaps) and, if a derivative instrument is utilized to hedge an anticipated transaction, the anticipated transaction must be probable of occurring. Derivative instruments meeting these hedging criteria are formally designated as hedges at the inception of the contract.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;The unrealized gains and losses resulting from changes in fair value of an effective hedge are recorded in &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Accumulated Other Comprehensive Income (Loss)&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; and are amortized to earnings over the remaining term of the hedged items. The ineffective portion of a hedge, if any, is immediately recognized in earnings to the extent that the change in value of the derivative instrument does not perfectly offset the change in value of the item being hedged. We estimate the fair value of our financial instruments through a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. Primarily, we use quoted market prices or quotes from brokers or dealers for the same or similar instruments. These values represent a general approximation of possible value and may never actually be realized.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;See Note&amp;#160;18&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; for information on our financial instruments.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Fair value measurements.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;The objective of fair value is to determine the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price). &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;We estimate&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; fair value&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; for all of our assets and liabilities&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; using available market information and valuation methodologies we believe to be appropriate for these purposes. Considerable judgment and a high degree of subjectivity are involved in developing these estimates and, accordingly, they are not necessarily indicative of amounts that we would realize upon disposition. The fair value hierarchy consists of three broad l&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;evels&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;:&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;&amp;#8226;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Level&amp;#160;1&amp;#160;&amp;#8212; Quoted prices in active markets for identical assets or liabilities that the entity has the ability to access.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;&amp;#8226;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Level&amp;#160;2&amp;#160;&amp;#8212; Observable inputs, other than quoted prices included in Level&amp;#160;1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:28.8px;"&gt;&amp;#8226;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Level&amp;#160;3&amp;#160;&amp;#8212; Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets and liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Environmental costs.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;We incur certain environmental remediation costs, including cleanup costs, consulting fees for environmental studies and investigations, monitoring costs, and legal costs relating to cleanup, litigation defense, and the pursuit of responsible third parties. Costs incurred in connection with operating properties and properties previously sold are expensed. Costs related to undeveloped land are capitalized as development costs. Costs incurred for properties to be disposed are included in the cost of the properties upon disposition. We maintain a liability for the estimated costs of environmental remediation expected to be incurred in connection with undeveloped land, operating properties and properties previously sold that we adjust as appropriate as information becomes available.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-weight:bold;font-style:italic;margin-left:0px;"&gt;Recent Accounting Pronouncements.&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;&amp;#160;In June 2009, the FASB issued a new &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;accounting standard that was&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; effective on January&amp;#160;1, 2010. This accounting standard is a revision to a previous FASB interpretation and changes how a reporting entity evaluates whether an entity &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;is a VIE&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; and which entity is considered the primary beneficiary of a VIE and is therefore required to consolidate such VIE. This accounting standa&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;rd &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;also require&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;s ongoing assessment at each reporting period&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt; of which party within the VIE is considered the primary beneficiary a&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;nd additional &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;disclosures related to VIE's. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;The adoption of this standard on January 1, 2010 did not have &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;a &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;material impact on our financial position or results of operations.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;In July 2010, the FASB issued a new accounting standard that expands existing disclosures about the credit quality of financing receivables and the related allowance for credit losses. The e&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;xpanded disclosure requirements, which are effective for ending balances as of December 31,2010, &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;are applicable to our &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;Notes Receivable Backed by Real Estate&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;font-style:italic;"&gt;, &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;and have been included in &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;Note 6. &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;D&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;isclosures &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;regarding &lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;activity that occurs during the reporting period will be effe&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;ctive beginning January 1, 2011&lt;/font&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;"&gt;.&lt;/font&gt;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&amp;#160;&lt;/p&gt;&lt;p style='margin-top:0pt; margin-bottom:0pt'&gt;&lt;font style="font-family:Times New Roman;font-size:8pt;margin-left:0px;"&gt;In January 2010, the FASB issued a new accounting standard that requires disclosures about purchases, sales, issuances and settlements in the reconciliation for Level 3 fair value measurements. The Level 3 disclosure requirements are effective for us on January 1, 2011, and will not have an impact on our financial position or results of operations.&lt;/font&gt;&lt;/p&gt;</NonNumbericText><NonNumericTextHeader>2.          Summary of Significant Accounting Policies:&amp;#160;Basis of Presentation and Consolidation.&amp;#160;The accompanying consolidated financial statements</NonNumericTextHeader><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell></Cells><OriginalInstanceReportColumns /><Unit>Other</Unit><ElementDataType>us-types:textBlockItemType</ElementDataType><SimpleDataType>string</SimpleDataType><ElementDefenition>This element may be used to describe all significant accounting policies of the reporting entity.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher AICPA
 -Name Accounting Principles Board Opinion (APB)
 -Number 22
 -Paragraph 8

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