11. Segment Information Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company's chief operating decision maker is its Chief Executive Officer. The operating segments are reviewed separately because each operating segment represents a strategic business unit that generally offers different products and serves different markets. The Company's chief operating decision maker evaluates the operating results of the Company's reportable segments based upon revenues and "adjusted net income," which is defined by the Company as net income adjusted for fair value changes of derivative instruments, the amortization of purchased intangibles, the net impact of tax rate changes on the estimate of amounts due under the tax receivable agreement, the net impact of tax rate changes on IPO related goodwill, certain non-cash asset impairment charges and the gains on the extinguishment of a portion of the tax receivable agreement. These adjustments are reflected net of the tax impact. The Company operates in two reportable segments, Fleet Payment Solutions and Other Payment Solutions. The Fleet Payment Solutions segment provides customers with payment and transaction processing services specifically designed for the needs of vehicle fleet customers. This segment also provides information management services to these fleet customers. The Other Payment Solutions segment provides customers with a payment processing solution for their corporate purchasing, payroll and transaction monitoring needs. Revenue in this segment is derived from corporate charge cards, single use accounts and prepaid card products. The corporate charge card products are used by businesses to facilitate purchases of products and utilize the Company's information management capabilities. The operations from the rapid! acquisition are included in the Other Pay