This excerpt taken from the AN 10-K filed Feb 24, 2005.
Property and Equipment
Property and equipment are recorded at cost. Expenditures for major additions and improvements are capitalized, while minor replacements, maintenance and repairs are charged to expense as incurred. When property is retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in Other Income (Expense), Net in the Consolidated Income Statements.
Depreciation is provided over the estimated useful lives of the assets involved using the straight-line method. Leasehold improvements are amortized over the estimated useful life of the asset or the respective lease term, whichever is shorter. The estimated useful lives are: fifteen to forty years for buildings and improvements, three to ten years for equipment and seven to ten years for furniture and fixtures.
The Company continually evaluates property and equipment, including leasehold improvements, to determine whether events and circumstances have occurred that may warrant revision of the estimated useful life or whether the remaining balance should be evaluated for possible impairment. The Company uses an estimate of the related undiscounted cash flows over the remaining life of the property and equipment in assessing whether an asset has been impaired. The Company measures impairment losses based upon the amount by which the carrying amount of the asset exceeds the fair value. Fair values generally are estimated using prices for similar assets and/or discounted cash flows.