Introduction and Basis of Presentation Certain acronyms and terms used throughout this Quarterly Report are specific to the Company, commonly used in the trucking industry, or are otherwise frequently used throughout this document. Definitions for these acronyms and terms are provided in the "Glossary of Terms," available in the front of this document. Description of Business Knight-Swift is a transportation solutions provider, headquartered in Phoenix, Arizona. During the first quarter of 2019 , we operated an average of 18,934 tractors (comprised of 16,208 company tractors and 2,726 independent contractor tractors) and 58,934 trailers within our Trucking segment. Additionally, we operated an average of 693 tractors and 9,866 containers in our Intermodal segment. The Company's three reportable segments are Trucking, Logistics, and Intermodal. Segment Realignment During the first quarter of 2019, the Company reorganized its reportable segments to reflect managements revised reporting structure. Under this revised reporting structure, the Company's three reportable segments, are as follows:  The Trucking segment now includes the results of the previously-reported Knight Trucking, Swift Truckload, Swift Dedicated, and Swift Refrigerated segments.  The Logistics segment now includes the results of the Knight brokerage and Swift logistics businesses which were previously included within the Knight Logistics and Swift non-reportable segments, respectively.  The Intermodal segment now includes the results of the previously-reported Swift Intermodal segment and the results of the Knight intermodal business, which was previously included in the Knight Logistics segment. The non-reportable segments continue to include support services that Swift's subsidiaries provide to customers and independent contractors (including repair and maintenance shop services, equipment leasing, and insurance), as well as certain legal settlements and accruals, amortization of intangibles related to the 2017 Merger and certain other corporate expenses. Additionally, the non-reportable segments now include Knight's equipment leasing and warranty services to independent contractors and trailer parts manufacturing, which were previously reported within the Knight Logistics segment. Abilene Acquisition On March 16, 2018, the Company acquired all of the issued and outstanding equity interests of Abilene. Abilene's trucking and logistics businesses are included under the respective segments. Please refer to Note 4 for more information about the Abilene Acquisition. Basis of Presentation The condensed consolidated financial statements and footnotes included in this Quarterly Report should be read in conjunction with the consolidated financial statements and footnotes included in Knight-Swift's 2018 Annual Report. The condensed consolidated financial statements in this Quarterly Report include the accounts of Knight-Swift Transportation Holdings Inc. and its subsidiaries. In management's opinion, these condensed consolidated financial statements were prepared in accordance with GAAP and include all adjustments necessary (consisting of normal recurring adjustments) for the fair statement of the periods presented. With respect to transactional/durational data, references to years pertain to calendar years. Similarly, references to quarters pertain to calendar quarters. Note regarding comparability  The reported results do not include the results of operations of Abilene and its subsidiaries on and prior to its acquisition by the Company on March 16, 2018 in accordance with the accounting treatment applicable to the transaction. Changes in Presentation The Company's changes in presentation were attributed to impacts from adopting accounting pronouncements (refer to Note 2) and simplifying the presentation of the condensed consolidated statements of cash flows by reclassifying immaterial line items into other line items. Accordingly, the amounts presented in the Company's first quarter 2018 condensed consolidated statement of cash flows were reclassified to align with the presentation in this first quarter 2019 Quarterly Report as follows:  "Transportation Resource Partners impairment," "Income from investment in Transportation Resource Partners," "Reduction of allowance for doubtful accounts and notes receivable," "Stock-based compensation expense," and "Amortization of debt issuance costs, and other" were reclassified to "Other adjustments to reconcile net income to net cash provided by operating activities."  Changes in "Other current assets," "Prepaid expenses," and "Other long-term assets" were reclassified to "Other assets and liabilities."  "Proceeds from notes receivable," "Payments received on equipment sales receivables," "Return of Investment from Transportation Resource Partners," and "Cash proceeds from Transportation Resource Partners" were reclassified to "Other cash flows from investing activities."  "Share withholding for taxes due on equity awards" and "Cash distribution to noncontrolling interest holder" were reclassified to "Other cash flows from financing activities."  "Repayments on Knight Revolver, net" and "Repayments on Revolver, net" were reclassified to "Borrowings on revolving lines of credit, net." Seasonality In the transportation industry, results of operations generally follow a seasonal pattern. Freight volumes in the first quarter are typically lower due to less consumer demand, customers reducing shipments following the holiday season, and inclement weather. At the same time, operating expenses generally increase, and tractor productivity of the Company's fleet, independent contractors, and third-party carriers decreases during the winter months due to decreased fuel efficiency, increased cold weather-related equipment maintenance and repairs, and increased insurance claims and costs attributed to higher accident frequency from harsh weather. These factors typically lead to lower operating profitability, as compared to other parts of the year. Additionally, beginning in the latter half of the third quarter and continuing into the fourth quarter, the Company typically experiences surges pertaining to holiday shopping trends toward delivery of gifts purchased over the Internet, as well as the length of the holiday season (consumer shopping days between Thanksgiving and Christmas).