SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation

The accompanying consolidated balance sheet as of December 31, 2016, which has been derived from audited financial statements, and unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and note disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been omitted pursuant to those rules and regulations, although we believe that the disclosures made are adequate to make the information not misleading. It is suggested that these financial statements be read in conjunction with the financial statements and notes thereto included in the Trust’s latest Annual Report on Form 10-K. In the opinion of management, all adjustments (consisting of normal, recurring adjustments) necessary for a fair presentation for the periods presented have been included. The results of operations for the three and nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for the full year.

Principles of Consolidation

Our consolidated financial statements include the accounts of the Trust, its corporate subsidiaries, and all entities in which the Trust has a controlling interest or has been determined to be the primary beneficiary of a variable interest entity (“VIE”). The equity interests of other investors are reflected as noncontrolling interests or redeemable noncontrolling interests. All significant intercompany transactions and balances are eliminated in consolidation. We account for our interests in joint ventures, which we do not control, using the equity method of accounting. Certain 2016 amounts have been reclassified to conform to current period presentation.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, referred to as “GAAP,” requires management to make estimates and assumptions that in certain circumstances affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and revenues and expenses. These estimates are prepared using management’s best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates.

Revenue Recognition

We are currently under construction on 221 condominium units at our Assembly Row and Pike & Rose properties. Gains or losses on the sale of these condominium units are recognized in accordance with the provisions of ASC Topic 360-20, “Property, Plant and Equipment – Real Estate Sales.” We account for contracted condominium sales under the percentage-of-completion method, based on an evaluation of the criteria specified in ASC Topic 360-20 including: the legal commitment of the purchaser in the real estate contract, whether the construction of the project is beyond a preliminary phase, whether sufficient units have been contracted to ensure the project will not revert to a rental project, the ability to reasonably estimate the aggregate project sale proceeds and aggregate project costs, and the determination that the buyer has made an adequate initial and continuing cash investment under the contract. When the percentage-of-completion criteria have not been met, no profit is recognized. The application of this criteria can be complex and requires us to make assumptions.

Recently Issued Accounting Pronouncements

In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers." ASU 2014-09 as amended and interpreted by ASU 2015-14, ASU 2016-08, ASU 2016-10, ASU 2016-12, and ASU 2016-20, supersedes nearly all existing revenue recognition guidance under GAAP and replaces it with a core revenue recognition principle, that an entity will recognize revenue when it transfers control of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, and creates a five-step model for revenue recognition in accordance with this principle. While we are still completing the assessment of the impact of these

standards to our consolidated financial statements, we believe the majority of our revenue falls outside of the scope of this

guidance. However, the new guidance will affect the accounting method related to our gains on condominium sales. Currently, gains on contracted sales are recognized using the percentage-of-completion method, with the gain recognized once certain criteria have been met in advance of legal closing (see further discussion in Note 3 to the consolidated financial statements). Under the new guidance, condominium sale gains will be recognized as the condominium units are legally sold, which will typically be upon closing. We intend to implement the new revenue recognition guidance retrospectively with the cumulative effect recognized in retained earnings at the date of initial application.

In February 2017, the FASB issued ASU 2017-05, "Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets." ASU 2017-05 clarifies that ASC 610-20 applies to all nonfinancial assets (including real estate) for which the counterparty is not a customer and also clarifies that all businesses are derecognized using the deconsolidation guidance. Additionally, it defines an insubstance nonfinancial asset as a financial asset that is promised to a counterparty in a contract in which substantially all of the fair value of the assets promised in the contract is concentrated in nonfinancial assets, which excludes cash or cash equivalents and liabilities. The new guidance is expected to impact the gain recognized when a real estate asset is sold to a non-customer and a noncontrolling interest is retained. Under the current guidance, a partial sale is recognized and carryover basis is used for the retained interest, however, the new guidance eliminates the use of carryover basis and generally requires a full gain to be recognized. ASU 2017-05 is effective for us in the first quarter of 2018, and we are currently assessing the impact of this standard to our consolidated financial statements.

In May 2017, the FASB issued ASU 2017-09, "Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting." ASU 2017-09 clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. Under the new guidance, an entity will not apply modification accounting if the awards' fair value, vesting conditions, and the classification of the award as equity or a liability are the same immediately before and after the change. ASU 2017-09 is effective for us in the first quarter of 2018, is applied prospectively to awards granted or modified after the adoption date, and is not expected to have a significant impact to our consolidated financial statements.

Recently Adopted Accounting Pronouncements

In March 2016, the FASB issued ASU 2016-09, "Compensation - Stock Compensation." ASU 2016-09 simplifies the accounting for share-based payment transactions, including a policy election option with respect to accounting for forfeitures either as they occur or estimating forfeitures (as is currently required), as well as increasing the amount an employer can withhold to cover income taxes on equity awards. Additionally, ASU 2016-09 requires the cash paid to a taxing authority when shares are withheld to pay employee taxes to be classified as a "financing activity" rather than an "operating activity," as was done previously on the Statement of Cash Flows. We adopted this standard effective January 1, 2017, and as a result, we are now accounting for forfeitures as they occur, and have recorded the cumulative impact on the adoption date as a $0.1 million adjustment to additional paid in capital and retained earnings. The amount reclassified from "operating activities" to "financing activities" for shares withheld for employee taxes was $4.4 million.

In January 2017, the FASB issued ASU 2017-01, "Clarifying the Definition of a Business." ASU 2017-01 changes the definition of a business to exclude acquisitions where substantially all of the fair value of the assets acquired are concentrated in a single identifiable asset or a group of similar identifiable assets. Given this change in definition, we believe most of our shopping center acquisitions will no longer be considered business combinations but rather asset acquisitions. While there are various differences between the accounting for an asset acquisition and a business combination, the largest impact will be that transaction costs are capitalized for asset acquisitions rather than expensed when they were considered business combinations. Based on acquisitions in the past several years, transaction costs for a single shopping center acquisition have typically ranged from $0.2 million to $2.4 million with significantly higher transaction costs expected for an acquisition of a larger portfolio. We adopted this standard effective January 1, 2017, and are applying the new guidance prospectively. Our acquisitions in the first nine months of 2017 (further discussed in Note 3 below) qualified as asset acquisitions and consequently, all transaction costs were capitalized.

Consolidated Statements of Cash Flows—Supplemental Disclosures

The following table provides supplemental disclosures related to the Consolidated Statements of Cash Flows:



	Nine Months Ended
	September 30,
	2017			2016
	(In thousands)
SUPPLEMENTAL DISCLOSURES:
Total interest costs incurred	$	92,520		$	83,803
Interest capitalized	(18,568		)	(12,660		)
Interest expense	$	73,952		$	71,143
Cash paid for interest, net of amounts capitalized	$	70,486		$	66,921
Cash paid for income taxes	$	342		$	300
NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Mortgage loans refinanced	$	166,823		$	—
Mortgage loans assumed with acquisition	$	79,401		$	34,385
DownREIT operating partnership units issued with acquisition of noncontrolling interest	$	5,918		$	—
DownREIT operating partnership units redeemed for common shares	$	2,569		$	18,679
Shares issued under dividend reinvestment plan	$	1,528		$	1,523