Note

Derivative Instruments

We engage in activities that expose us to market risks, including the effects of changes in fuel prices and in interest rates. Financial exposures are evaluated as an integral part of our risk management program, which seeks, from time-to-time, to reduce the potentially adverse effects that the volatility of fuel markets and interest rate risk

may

have on operating results.

In an effort to seek to reduce the variability of the ultimate cash flows associated with fluctuations in diesel fuel prices, we periodically enter into various derivative instruments, including forward futures swap contracts. Specifically, we enter into hedging contracts with respect to ultra-low sulfur diesel ("ULSD"). Under these contracts, we pay a fixed rate per gallon of ULSD and receive the monthly average price of Gulf Coast ULSD. The retrospective and prospective regression analyses provided that changes in the prices of diesel fuel and ULSD were deemed to be highly effective based on the relevant authoritative guidance. We do

not

engage in speculative transactions, nor do we hold or issue financial instruments for trading purposes.

August 2015,

we entered into an interest rate swap agreement with a notional amount of

$28.0

million, which was designated as a hedge against the variability in future interest payments due on the debt associated with the purchase of our corporate headquarters as described in Note

The terms of the swap agreement effectively convert the variable rate interest payments on this note to a fixed rate of

4.2%

through maturity on

August 1, 2035.

2016

and

2017,

we also entered into several interest rate swaps, which were designated to hedge against the variability in future interest rate payments associated with the purchase of certain trailers. Because the critical terms of the swaps and hedged items coincide, in accordance with the requirements of ASC

815,

the change in the fair value of the derivative is expected to exactly offset changes in the expected cash flows due to fluctuations in the LIBOR rate over the term of the debt instrument, and therefore

ongoing assessment of effectiveness is required. The fair value of all interest rate swap agreements that were in effect at

June 30, 2018,

of approximately

$0.9

million, is included in other short and long-term assets in the condensed consolidated balance sheet and is included in accumulated other comprehensive income, net of tax. Additionally,

$0.1

million was reclassified from accumulated other comprehensive income into our results of operations as additional interest expense for the

three

months ended

June 30, 2018,

related to changes in interest rates during such period. Based on the amounts in accumulated other comprehensive income as of

June 30, 2018,

we expect to reclassify gains of approximately

$0.1

million, net of tax, on derivative instruments from accumulated other comprehensive income into our results of operations during the next

twelve

months due to changes in interest rates. The amounts actually realized will depend on the fair values as of the date of settlement.

We recognize all derivative instruments at fair value on our condensed consolidated balance sheets. Our derivative instruments are designated as cash flow hedges, thus the gain or loss on the derivatives is reported as a component of accumulated other comprehensive income and will be reclassified into earnings in the same period during which the hedged transaction affects earnings. The change in fair value of the hedge offsets the change in fair value of the hedged item.

June 30, 2018,

we had fuel hedge contracts on approximately

3.8

million gallons for the remainder of

2018,

or approximately

16.9%

of our projected remaining

2018

fuel requirements.

The fair value of the fuel hedge contracts that were in effect at

June 30, 2018,

of approximately

$1.3

million is included in other short-term assets in the consolidated balance sheet and is included in accumulated other comprehensive income, net of tax. Changes in the fair values of these instruments can vary dramatically based on changes in the underlying commodity prices. For example, during the

second

quarter in

2018,

market "spot" prices for ULSD peaked at a high of approximately

$2.25

per gallon and hit a low price of approximately

$1.92

per gallon. During the same

2017

quarter, market "spot" prices ranged from a high of

$1.62

per gallon to a low of

$1.33

per gallon. Market price changes can be driven by factors such as supply and demand, inventory levels, weather events, refinery capacity, political agendas, the value of the U.S. dollar, geopolitical events, and general economic conditions, among other items.

Additionally,

$0.5

million and

$0.7

million were reclassified from accumulated other comprehensive income into our results of operations as a reduction to fuel expense for the

three

and

six

months ended

June 30, 2018,

respectively, related to gains on contracts that expired. Based on the amounts in accumulated other comprehensive income as of

June 30, 2018,

and the expected timing of the purchases of the diesel hedged, we expect to reclassify gains of approximately

$0.9

million, net of tax, on derivative instruments from accumulated other comprehensive income into our results of operations during the next

twelve

months due to actual diesel fuel purchases. The amounts actually realized will be dependent on the fair values as of the date of settlement.

We perform both a prospective and retrospective assessment of the effectiveness of our fuel hedge contracts at inception and quarterly, including assessing the possibility of counterparty default. If we determine that a derivative is

longer expected to be highly effective, we discontinue hedge accounting prospectively and recognize subsequent changes in the fair value of the hedge in earnings. As a result of our effectiveness assessment at inception and at

June 30, 2018,

we believe our hedge contracts have been and will continue to be highly effective in offsetting changes in cash flows attributable to the hedged risk.

Outstanding financial derivative instruments expose us to credit loss in the event of nonperformance by the counterparties to the agreements. We do

not

expect any of the counterparties to fail to meet their obligations. Our credit exposure related to these financial instruments is represented by the fair value of contracts reported as assets. To manage credit risk, we review each counterparty's audited financial statements, credit ratings, and obtain references as we deem necessary.