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Note 6 - Derivative Instruments
 9 Months Ended
Sep. 30, 2015
Notes to Financial Statements  
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Note 6.
Derivative Instruments
 
We engage in activities that expose us to market risks, including the effects of changes in fuel prices and changes 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 (which we refer to as "fuel hedge contracts"). Historically diesel fuel has not been a traded commodity on the futures market, so heating oil has been used as a substitute
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as prices for both generally move in similar directions. Recently, however, we have been able to enter into fuel hedge contracts with respect to both heating oil and ultra low sulfur diesel ("ULSD"). Under these contracts, we pay a fixed rate per gallon of heating oil or ULSD and receive the monthly average price of New York heating oil per the New York Mercantile Exchange ("NYMEX") and Gulf Coast ULSD, respectively. The retrospective and prospective regression analyses provided that changes in the prices of diesel fuel and heating oil and diesel fuel and ULSD were each deemed to be highly effective based on the relevant authoritative guidance except for a small portion of our fuel hedge contracts, which we determined to be ineffective on a prospective basis. Consequently, for the three and nine months ended September 30, 2015, we recognized approximately $0.3 million and $1.2 million reductions, respectively, of fuel expense to mark the related liability to market as well as settlement for the related fuel hedge contracts. We do not engage in speculative transactions, nor do we hold or issue financial instruments for trading purposes.
 
In 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 7. 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. Because the critical terms of the swap and hedged item coincide
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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 no ongoing assessment of effectiveness is required
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The fair value of the swap agreement that was in effect at September 30, 2015, of approximately $1.3 million, is included in other liabilities in the condensed consolidated balance sheet, and is included in accumulated other comprehensive loss, net of tax. Additionally, $0.1 million was reclassified from accumulated other comprehensive loss into our results of operations as additional interest expense for the three and nine months ended September 30, 2015, related to changes in interest rates during such periods. Based on the amounts in accumulated other comprehensive loss as of September 30, 2015, we expect to reclassify losses of approximately $0.4 million, net of tax
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on derivative instruments from accumulated other comprehensive loss into our results of operations during the next twelve months due to changes in interest rates
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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 effective portion of the gain or loss on the derivatives is reported as a component of accumulated other comprehensive loss and will be reclassified into our results of operations in the same period during which the hedged transaction affects earnings. The effective portion of the derivative represents the change in fair value of the hedge that offsets the change in fair value of the hedged item. For our fuel hedge contracts, to the extent the change in the fair value of the fuel hedge contract does not perfectly offset the change in the fair value of the hedged item, the ineffective portion of the fuel hedge contract is immediately recognized in our condensed consolidated statements of operations. Ineffectiveness is calculated using the cumulative dollar offset method as an estimate of the difference in the expected cash flows of the respective fuel hedge contracts (heating oil or ULSD) compared to the changes in the all-in cash outflows required for the diesel fuel purchases.
 
At September 30, 2015, we had fuel hedge contracts on 3.1 million gallons for the remainder of 2015, or 22.5% of our projected remaining 2015 fuel requirements, 12.1 million gallons for 2016, or approximately 21.9% of our projected 2016 fuel requirements, 10.6 million gallons for 2017, or approximately 19.2% of our projected 2017 fuel requirements, and 4.5 million gallons for 2018
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or approximately 8.2% of our projected 2018 fuel requirements
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The fair value of the fuel hedge contracts that were in effect at September 30, 2015, of approximately $22.1 million, is included in other liabilities in the condensed consolidated balance sheet, and is included in accumulated other comprehensive loss, 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 third quarter of 2015, market "spot" prices for ULSD peaked at a high of approximately $1.77 per gallon and hit a low price of approximately $1.32 per gallon. During the same 2014 quarter, market "spot" prices ranged from a high of $2.91 per gallon to a low of $2.62 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, $4.2 million and $10.7 million were reclassified from accumulated other comprehensive loss into our results of operations as additional fuel expense for the three and nine months ended September 30, 2015, respectively, related to losses on fuel hedge contracts that expired. In addition to the $4.2 million and $10.7 million reclassified from accumulated other comprehensive loss for the quarter and nine months
ended September 30, 2015, respectively, which related to losses on fuel hedge contracts that expired or were sold and for which we completed the forecasted transaction by purchasing the hedged diesel fuel, $0.3 million and $1.2 million, respectively, were recorded as favorable adjustments to fuel expense, related to fuel hedge contracts for which the fuel hedging relationship was deemed to be ineffective on a prospective basis for the same periods
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Based on the amounts in accumulated other comprehensive loss as of September 30, 2015, and the expected timing of the purchases of the diesel fuel hedged, we expect to reclassify losses of approximately $8.9 million, net of tax
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on derivative instruments from accumulated other comprehensive loss into our results of operations during the next twelve months due to the 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 no 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 September 30, 2015, we believe our fuel hedge contracts have been and will continue to be highly effective in offsetting changes in cash flows attributable to the hedged risk, with the exception of the abovementioned contracts.
 
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/or obtain references as we deem necessary.
 
If our fuel derivative instruments are in a net liability position with the counterparty and cash collateral is required, the cash collateral amounts provided are netted against the fair value of current outstanding derivative instruments. No cash collateral deposits were required by us at September 30, 2015, and at December 31, 2014, $5.0 million in cash collateral was provided by us in connection with our outstanding fuel derivative instruments.