Same-station results, as presented herein, compare stations operated by the Company throughout all periods presented in the following tables. For the three and twelve months ended December 31, 2010 and 2009, same-station results exclude the operating results from KBET-AM and certain assets used in the operation of radio stations KCYE-FM and KFRH-FM in Las Vegas, Nevada, which were divested during the third quarter of 2009 as well as revenue and costs related to the non-renewal of certain sports programming rights for the Company's Miami-Fort Lauderdale market cluster.
SOI and same-station SOI are financial measures of performance that are not calculated in accordance with U.S. generally accepted accounting principles, which we refer to as GAAP. We use these non-GAAP financial measures for internal budgeting purposes. We also use SOI to make decisions as to the acquisition and disposition of radio stations. SOI and same-station SOI excludes corporate-level costs and expenses and depreciation and amortization, which may be material to an assessment of the Company's overall operating performance. Management compensates for this limitation by separately considering the impact of these excluded items to the extent they are material to operating decisions or assessments of the Company's operating performance. Moreover, the corresponding amounts of the non-cash and corporate-level costs and expenses excluded from the calculation are available to investors as they are presented on our statements of operations contained in our periodic reports filed with the Securities and Exchange Commission (SEC).
SOI is a measure widely used in the radio broadcast industry. While the Company recognizes that because SOI is not calculated in accordance with GAAP, it is not necessarily comparable to similarly titled measures employed by other companies. Management believes that SOI provides meaningful information to investors because it is an important measure of how effectively we operate our business (i.e., operate radio stations) and assists investors in comparing our operating performance with that of other radio companies. We also believe that providing SOI on a same-station basis is a useful measure of our performance because it presents SOI before the impact of any acquisitions or dispositions completed during the relevant periods. This allows investors to measure the performance of radio stations we owned and operated during the entirety of two operating periods being compared.