Segment information is prepared on the same basis that management reviews information for operational decision-making purposes. Management evaluates the performance of each of the Company’s properties individually and aggregates such properties into segments based on their economic characteristics and classes of tenants. The Company operates in four business segments: (i) office real estate, (ii) retail real estate, (iii) multifamily residential real estate, and (iv) general contracting and real estate services. The Company’s general contracting and real estate services business develops and builds properties for its own account and also provides construction and development services to both related and third parties.

"Acquired intangible lease assets" as a separate line item. As a result, the Company no longer includes acquired intangible lease assets as part of "Other assets". The Company also revised the presentation in its consolidated statement of cash flows for all reporting periods by reclassifying offering cost charges on its common stock issuance and including the charges with "Proceeds from issuance of common stock, net" line item. This presentation change had no other impact on the Company's consolidated financial statements or any other operating measure for the periods affected.

The Company leases its properties under operating leases and recognizes base rents when earned on a straight-line basis over the lease term. Rental revenues include $3.4 million, $2.7 million and $1.2 million of straight-line rent adjustments for the years ended December 31, 2019, 2018, and 2017, respectively. The Company begins recognizing rental revenue when the tenant has the right to take possession of or controls the physical use of the property under lease. The extended collection period for accrued straight-line rental revenue along with the Company’s evaluation of tenant credit risk may result in the nonrecognition of all or a portion of straight-line rental revenue until the collection of substantially all such revenue for a tenant is probable. The Company recognizes contingent rental revenue (e.g., percentage rents based on tenant sales thresholds) when the sales thresholds are met. Contingent rents included in rental revenues were $0.3 million, $0.3 million, and $0.4 million for the years ended December 31, 2019, 2018, and 2017, respectively. The Company recognizes leasing incentives as reductions to rental revenue on a straight-line basis over the lease term. Leasing incentive amortization was $0.7 million, $0.7 million, and $0.8 million for the years ended December 31, 2019, 2018, and 2017, respectively. The Company recognizes fair value adjustments recorded at the time of lease assumption in rental income on a straight line basis as a reduction to revenue over the remaining life

The Company recognizes general contracting revenues as a customer obtains control of promised goods or services in an amount that reflects the consideration the Company expects to receive in exchange for those goods or services. For each construction contract, the Company identifies the performance obligations, which typically include the delivery of a single building constructed according to the specifications of the contract. The Company estimates the total transaction price, which generally includes a fixed contract price and may also include variable components such as early completion bonuses, liquidated damages, or cost savings to be shared with the customer. Variable components of the contract price are included in the transaction price to the extent that it is probable that a significant reversal of revenue will not occur. The Company recognizes the estimated transaction price as revenue as it satisfies its performance obligations; the Company estimates its progress in satisfying performance obligations for each contract using the input method, based on the proportion of incurred costs relative to total estimated construction costs at completion. Construction contract costs include all direct material, direct labor, subcontract costs, and overhead costs directly related to contract performance. Changes in job performance, job conditions, and estimated profitability, including those arising from contract penalty provisions and final contract settlements, are all significant judgments that may result in revisions to costs and income and are recognized in the period in which they are determined. Additionally, the estimated costs at completion are affected by management’s forecasts of anticipated costs to be incurred and contingency reserves for exposures related to unknown costs, such as design deficiencies and subcontractor defaults. The estimated variable consideration is also affected by claims and unapproved change orders, which may result from changes in the scope of the contract. Provisions for estimated losses on uncompleted contracts are recognized immediately in the period in which such losses are determined. The Company defers precontract costs when such costs are directly associated with specific anticipated contracts and their recovery is probable.

Income producing property primarily includes land, buildings, and tenant improvements and is stated at cost. Real estate investments held for development include land and capitalized development costs. The Company reclassifies real estate investments held for development to construction in progress upon commencement of construction. Construction in progress is stated at cost. Direct and certain indirect costs clearly associated with the development, redevelopment, construction, leasing, or expansion of real estate assets are capitalized as a cost of the property. Repairs and maintenance costs are expensed as incurred.

The Company capitalizes direct and indirect project costs associated with the initial development of a property until the property is substantially complete and ready for its intended use. Capitalized project costs include preacquisition, development, and preconstruction costs including overhead, salaries, and related costs of personnel directly involved, real estate taxes, insurance, utilities, ground rent, and interest. Interest capitalized during the years ended December 31, 2019, 2018, and 2017 was $5.9 million, $5.0 million and $1.3 million, respectively. Overhead, salaries and related personnel costs capitalized during the years ended December 31, 2019, 2018, and 2017 were $3.1 million, $3.1 million and $2.4 million, respectively.

Acquisitions of operating properties have been and will generally be accounted for as acquisitions of a group of assets, with costs incurred to effect an acquisition, including title, legal, accounting, brokerage commissions, and other related costs, being capitalized as part of the cost of the assets acquired. In connection with such acquisitions, the Company identifies and recognizes all assets acquired and liabilities assumed at their relative fair values as of the acquisition date. The purchase price allocations to tangible assets, such as land, site improvements, and buildings and improvements are presented within income producing property in the consolidated balance sheets and depreciated over their estimated useful lives. Acquired lease intangible assets are presented as a separate component of assets on the consolidated balance sheets. Acquired lease intangible liabilities are presented within other liabilities in the consolidated balance sheets. The Company amortizes in-place lease assets as depreciation and amortization expense on a straight-line basis over the remaining term of the related leases. The Company amortizes above-market lease assets as reductions to rental revenues on a straight-line basis over the remaining term of the related leases. The Company amortizes below-market lease liabilities as increases to rental revenues on a straight-line basis over the remaining term of the related leases. The Company amortizes below-market ground lease assets as increases to rental expenses on a straight-line basis over the remaining term of the related leases.

The Company values land based on a market approach, looking to recent sales of similar properties, adjusting for differences due to location, the state of entitlement, as well as the shape and size of the parcel. Improvements to land are valued using a replacement cost approach. The approach applies industry standard replacement costs adjusted for geographic specific considerations and reduced by estimated depreciation. The value of buildings acquired is estimated using the replacement cost approach, assuming the buildings were vacant at acquisition. The replacement cost approach considers the composition of the structures acquired, adjusted for an estimate of depreciation. The estimate of depreciation is made considering industry standard information and depreciation curves for the identified asset classes. The value of acquired lease intangibles considers the estimated cost of leasing the properties as if the acquired buildings were vacant, as well as the value of the current leases relative to market-rate leases. The in-place lease value is determined using an estimated total lease-up time and lost rental revenues during such time. The value of current leases relative to market-rate leases is based on market rents obtained for market comparables. Given the significance of unobservable inputs used in the valuation of acquired real estate assets, the Company classifies them as Level 3 inputs in the fair value hierarchy.

Real estate assets classified as held for sale are reported at the lower of their carrying value or their fair value, less estimated costs to sell. Once a property is classified as held for sale, it is no longer depreciated. A property is classified as held for sale when: (i) senior management commits to a plan to sell the property, (ii) the property is available for immediate sale in its present condition, subject only to conditions usual and customary for such sales, (iii) an active

The Company evaluates its real estate assets for impairment on a property by property basis whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. If such an evaluation is necessary, the Company compares the carrying amount of any such real estate asset with the undiscounted expected future cash flows that are directly associated with, and that are expected to arise as a direct result of, its use and eventual disposition. If the carrying amount of a real estate asset exceeds the associated estimate of undiscounted expected future cash flows, an impairment loss is recognized to reduce the real estate asset’s carrying value to its fair value. The impairment charges recognized during the years ended December 31, 2019 and 2017 represent unamortized leasing or acquired intangible assets related to vacated tenants. The impairment charges recognized during the year ended December 31, 2018 primarily relate to the $1.5 million impairment of Waynesboro Commons, which was classified as of held for sale as of December 31, 2018.

Interest income on notes receivable is accrued based on the contractual terms of the loans and when it is deemed collectible. Many loans provide for accrual of interest and fees that will not be paid until maturity of the loan. Interest is recognized on these loans at the accrual rate subject to the determination that accrued interest and fees are ultimately collectible, based on the underlying collateral and the status of development activities, as applicable. If this determination cannot be made, recognition of interest income may be fully or partially deferred until it is ultimately paid.

The Company’s evaluation of the collectability of accounts receivable and the adequacy of the allowance for doubtful accounts is based primarily upon evaluations of individual receivables, current economic conditions, historical experience, and other relevant factors. The Company establishes a reserve for the receivables associated with a tenant when collection of substantially all operating lease payments for a tenant is not probable. As of December 31, 2019 and 2018, the allowance for doubtful accounts was $0.3 million and $0.6 million, respectively. The Company reflects these amounts as a component of rental income on the consolidated statements of comprehensive income.

The Company evaluates the collectability of both the interest on and principal of each of its notes receivable based primarily upon the value of the underlying development project. The Company considers factors such as the progress of development activities, including leasing activities, projected development costs, current and projected loan balances, and the estimated realizable value of the loan. The calculation of the estimated realizable value includes an estimation of the projected sales proceeds from the sale of the underlying development property, which is largely dependent on the estimated fair value of the underlying development property and is highly sensitive to significant assumptions based on management’s expectations about future real estate market or economic conditions and the projected operating results of the property. A loan is determined to be impaired when, based upon then-current information, it is no longer probable that the Company will be able to collect all contractual amounts then due from the borrower. The amount of impairment loss recognized is measured as the difference between the carrying amount of the loan and its estimated realizable value.

The Company measures and records a liability for the fair value of its guarantees on a nonrecurring basis upon issuance using Level 3 internally-developed inputs. These guarantees typically relate to payments that could be required of the Company to senior lenders on its mezzanine loan investments. The Company bases its estimated fair value on the market approach, which compares the guarantee terms and credit characteristics of the underlying development project to other projects for which guarantee pricing terms are available. The offsetting entry for the guarantee liability is a premium on the related loan receivable. The liability is amortized on a straight-line basis over the remaining term of the loan. On a quarterly basis, the Company assesses the likelihood of a contingent liability in connection with these guarantees and will record an additional guarantee liability if the unamortized guarantee liability is insufficient.

The Company may enter into interest rate derivatives to manage exposure to interest rate risks. The Company does not use derivative financial instruments for trading or speculative purposes. The Company recognizes derivative financial instruments at fair value and presents them within other assets and liabilities in the consolidated balance sheets. Gains and losses resulting from changes in the fair value of derivatives that are neither designated nor qualify as hedging instruments are recognized within the change in fair value of interest rate derivatives caption in the consolidated statements of comprehensive income. For derivatives that qualify as cash flow hedges, the gain or loss is reported as a component of other comprehensive income (loss) and reclassified into earnings in the periods during which the hedged forecasted transaction affects earnings.

The Company measures the compensation cost of restricted stock awards based on the grant date fair value. The Company recognizes compensation cost for the vesting of restricted stock awards using the accelerated attribution method. Compensation cost associated with the vesting of restricted stock awards is presented within either general and administrative expenses or general contracting and real estate services expenses in the consolidated statements of comprehensive income. Stock-based compensation for personnel directly involved in the construction and development of a property is capitalized. The effect of forfeitures of awards is recorded as they occur.

The Company has elected to be taxed as a REIT for U.S. federal income tax purposes. For continued qualification as a REIT for federal income tax purposes, the Company must meet certain organizational and operational requirements, including a requirement to pay distributions to stockholders of at least 90% of annual taxable income, excluding net capital gains. As a REIT, the Company generally is not subject to income tax on net income distributed as dividends to stockholders. The Company is subject to state and local income taxes in some jurisdictions and, in certain circumstances, may also be subject to federal excise taxes on undistributed income. In addition, certain of the Company’s activities must be conducted by subsidiaries that have elected to be treated as a taxable REIT subsidiary ("TRS") subject to both federal and state income taxes. The Operating Partnership conducts its development and construction businesses through the TRS. The related income tax provision or benefit attributable to the profits or losses of the TRS and any taxable income of the Company is reflected in the consolidated financial statements.

The Company uses the liability method of accounting for deferred income tax in accordance with GAAP. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to temporary differences between the carrying value of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using the statutory rates expected to be applied in the periods in which those temporary differences are settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in the period of the change. A valuation allowance is recorded on the Company’s deferred tax assets when it is more likely than not that such assets will not be realized. When evaluating the realizability of the Company’s deferred tax assets, all evidence, both positive and negative, is evaluated. Items considered in this analysis include the ability to carry back losses, the reversal of temporary differences, tax planning strategies, and expectations of future earnings.

Under GAAP, the amount of tax benefit to be recognized is the amount of benefit that is more likely than not to be sustained upon examination. Management analyzes its tax filing positions in the U.S. federal, state and local jurisdictions where it is required to file income tax returns for all open tax years. If, based on this analysis, management determines that uncertainties in tax positions exist, a liability is established. The Company recognizes accrued interest and penalties related to unrecognized tax positions in the provision for income taxes. If recognized, the entire amount of unrecognized tax positions would be recorded as a reduction to the provision for income taxes.

The Company calculates net income per share and unit based upon the weighted average shares and units outstanding. Diluted net income per share and unit is calculated after giving effect to all significant potential dilutive shares outstanding during the period. Potential dilutive shares outstanding during the period include nonvested restricted stock awards. However, there were no significant potential dilutive shares or units outstanding for each of the three years ended December 31, 2019, 2018, and 2017. As a result, basic and diluted outstanding shares and units were the same for each period presented.

On February 25, 2016, the Financial Accounting Standards Board ("FASB") issued an Accounting Standards Update ("ASU") that requires lessees to recognize most leases on their balance sheets as lease liabilities with corresponding right-of-use assets (ASU 2016-02—Leases (Topic 842)). The new standard also makes targeted changes to lessor accounting. The Company adopted the new standard on January 1, 2019, using the modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest comparative period presented as permitted in Accounting Standards Codification ("ASC") Topic 842.

In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which allowed the Company to not reassess whether any expired or existing contracts are or contain leases, not reassess the lease classification for any expired or existing leases, and not reassess initial direct costs for existing leases. As of January 1, 2019, the Company did not have any leases classified as finance leases. The Company also elected a practical expedient that allowed it to not separate non-lease components from lease components and instead to account for each lease and non-lease component as a single lease component. The adoption of the new standard as of January 1, 2019 did not impact the Company's consolidated results of operations and had no impact on cash flows.

As a lessee, the Company had six ground leases on five properties as of January 1, 2019 with initial terms that ranged from 20 to 65 years and options to extend up to an additional 70 years in certain cases. The exercise of lease renewal options is at the Company's sole discretion. The depreciable life of assets and leasehold improvements are limited by the expected lease term. The Company recognizes lease expense for operating leases on a straight-line basis over the lease term. The Company's lease agreements do not contain any residual value guarantees or material restrictive covenants.

As a lessor, the Company leases its properties under operating leases and recognizes base rents on a straight-line basis over the lease term. The Company also recognizes revenue from tenant recoveries, through which tenants reimburse the Company on an accrual basis for certain expenses such as utilities, janitorial services, repairs and maintenance, security and alarms, parking lot and ground maintenance, administrative services, management fees, insurance, and real estate taxes. Rental revenues are reduced by the amount of any leasing incentives amortized on a straight-line basis over the term of the applicable lease. In addition, the Company recognizes contingent rental revenue (e.g., percentage rents based on tenant sales thresholds) when the sales thresholds are met. Many tenant leases include one or more options to renew, with renewal terms that can extend the lease term from one to 15 years or more. The exercise of lease renewal options is at the tenant's sole discretion. The Company includes a renewal period in the lease term only if it appears at lease inception that the renewal is reasonably certain.

The new standard includes new considerations regarding the recognition of rental revenue when collection is not probable. The Company changed its presentation and measurement of charges for uncollectable lease revenue associated with its office, retail, and residential leasing activity, reflecting those amounts as a component of rental income on the accompanying Consolidated Statement of Comprehensive Income for the year ended December 31, 2019. However, in accordance with its prospective adoption of the standard, the Company did not adjust the prior year period presentation of charges for uncollectable lease revenue associated with its office, retail, and residential leasing activity as a component of operating expenses, excluding property taxes, on the accompanying Consolidated Statement of Comprehensive Income for the years ended December 31, 2018 and 2017. The Company recorded a combined adjustment of $0.2 million to the opening balances for distributions in excess of earnings and noncontrolling interest relating to receivables where collection of substantially all operating lease payments was not probable as of January 1, 2019.

Lease-related receivables, which include contractual amounts accrued and unpaid from tenants and accrued straight-line rents receivable, are reduced for credit losses. Such amounts are recognized as a reduction to real estate rental revenues. The Company evaluates the collectability of lease receivables using several factors, including a lessee’s creditworthiness. The Company recognizes a credit loss on lease-related receivables when, in the opinion of management, collection of substantially all lease payments is not probable. When collectability is determined not probable, any lease income subsequent to recognizing the credit loss is limited to the lesser of the lease income reflected on a straight-line basis or cash collected.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and in November 2018 issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. The guidance significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The guidance will replace the "incurred loss" approach under existing guidance with an "expected loss" model for instruments measured at amortized cost, such as our notes receivable. The guidance is effective for fiscal years beginning after December 15, 2019 and is to be adopted through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company continues to evaluate the impact of adopting this new accounting standard on the Company’s consolidated financial statements accounting policy and operational implementation issues. The Company expects that the adoption will result in earlier recognition of a provision for loan losses on its notes receivable and an insignificant increase in allowance for bad debt relating to construction receivables as a result of new forward-looking estimation requirements. The Company anticipates recording a reserve for expected credit losses for its notes receivable in an amount between $2.3 million and $3.3 million and an immaterial reserve on its construction receivables as a result of adopting the new standard on January 1, 2020.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13"). ASU 2018-13 eliminates, adds and modifies certain disclosure requirements for fair value measurements as part of its disclosure framework project. The standard is effective for all entities for financial statements issued for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. ASU 2018-13 is not expected to have a material impact on Company's consolidated financial statements or disclosures.