Quarterly report pursuant to Section 13 or 15(d)


9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  

The carrying value of cash, trade receivables, accounts payable, accrued liabilities, and other liabilities approximate fair value due to the immediate or short-term maturity of these financial instruments. The fair value of variable rate long term debt reflects recent market transactions and approximate carrying value.  We used other observable inputs that would qualify as Level 2 inputs to make our assessment of the approximate fair value of our cash, trade receivables,  accounts payable, accrued liabilities, other liabilities and variable rate long term debt.  The fair value of the derivative instruments are described below.
Interest Rate Swap

In March 2008 we entered into an interest rate swap agreement with Bank of America related to a $10.0 million term loan secured by plant, pipeline and equipment.  The interest rate swap was designed to minimize the effect of changes in the LIBOR rate.  We had designated the interest rate swap as a cash flow hedge under ASC Topic 815, Derivatives and Hedging. However, due to the ARC, we felt that the hedge was no longer entirely effective.  Due to the time required to make the determination and the immateriality of the hedge, we began treating it as ineffective as of October 1, 2014.

We assessed the fair value of the interest rate swap using a present value model that includes quoted LIBOR rates and the nonperformance risk of the Company and Bank of America based on the Credit Default Swap Market (Level 2 of fair value hierarchy).

We have consistently applied valuation techniques in all periods presented and believe we have obtained the most accurate information available for the types of derivative contracts we hold. The agreement terminated in December 2017; therefore, there was no outstanding liability at September 30, 2018, and December 31, 2017.  See discussion of our derivative instruments in Note 12.