18% in 2019, and 34% in 2018. Notes receivable are carried at their outstanding principal amounts, less an allowance for doubtful accounts to cover potential credit losses based on the financial condition of borrowers and collateral held by the Company. Inventories are stated at the lower of cost or market. Cost is determined using the last-in, first-out ("LIFO") method, which generally matches current costs of inventory sold with current revenues, for substantially all inventories. Property, plant and equipment are stated at the lower of cost or impaired value. Provisions for depreciation and amortization of property, plant and equipment have been computed for financial reporting purposes using the straight-line method over the estimated useful lives of the related assets, ranging from 10 to 40 years for buildings and improvements, and 3 to 10 years for machinery and equipment. Costs to repair and maintain the Company's equipment and facilities are expensed as incurred. Such costs typically include expenditures to maintain equipment and facilities in good repair and proper working condition. Long-lived assets are reviewed for impairment when circumstances indicate that the carrying value of an asset may not be fully recoverable. When the carrying value of the asset exceeds the value of its estimated undiscounted future cash flows, an impairment charge is recognized equal to the difference between the asset's carrying value and its fair value. Fair value is estimated using discounted cash flows, prices for similar assets or other valuation techniques. Goodwill represents the excess of purchase price over the fair value of identified net assets acquired in business combinations. In accordance with the provisions of the Financial Accounting Standards Board ("FASB") Accounting Standards Codification Topic ("ASC") 350,  “Intangibles-Goodwill and Other,”  the Company tests goodwill for impairment annually in the fourth quarter of each year or more frequently if events or circumstances indicate that the carrying value of goodwill associated with a reporting unit may not be fully recoverable. The goodwill impairment tests are based on determining the fair value of the specified reporting units based on management judgments and assumptions using the discounted cash flows and comparable company market valuation approaches. The Company has identified its reporting unit as its floorcovering business for the purposes of allocating goodwill and assessing impairments. The valuation approaches are subject to key judgments and assumptions that are sensitive to change such as judgments and assumptions about sales growth rates, operating margins, the weighted average cost of capital (“WACC”) and comparable company market multiples. When developing these key judgments and assumptions, the Company considers economic, operational and market conditions that could impact the fair value of the reporting unit. However, estimates are inherently uncertain and represent only management’s reasonable expectations regarding future developments. These estimates and the judgments and assumptions upon which the estimates are based will, in all likelihood, differ in some respects from actual future results. Should a significant or prolonged deterioration in economic conditions occur or a decline in comparable company market multiples, then key judgments and assumptions could be impacted. In the goodwill assessment process, the Company compares the carrying value of a reporting unit, including goodwill, to the fair value of the reporting unit to identify potential goodwill impairments. The Company estimates the fair value of the reporting unit by using both a discounted cash flow and comparable company market valuation approach. If an impairment is indicated in the assessment, the impairment would be measured as the amount by which the reporting unit's carrying value exceeds its fair value, not to exceed the carrying value of goodwill (See Note 7). Identifiable intangible assets with finite lives are generally amortized on a straight-line basis over their respective lives, which range from 10 to 20 years (See Note 7). The Company records liabilities to reflect an estimate of the ultimate cost of claims related to its self-insured medical and dental benefits and workers' compensation. The amounts of such liabilities are based on an analysis of the Company's historical experience for each type of claim. Inventories Property, Plant and Equipment Impairment of Long-Lived Assets Goodwill and Other Intangible Assets Self-Insured Benefit Programs Table of Contents 40 THE DIXIE GROUP, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (amounts in thousands, except per share data) (Continued)