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Financial Instrument Risk
 12 Months Ended
Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Financial Instrument Risk
Financial Instrument Risk

In the normal course of business, we are exposed to financial risks such as changes in interest rates, foreign currency exchange rates, and commodity prices. In 2016, 2015, and 2014, we did not use derivative instruments to manage these risks, except for interest rate swaps entered into in 2016 as discussed below.

Interest Rate Risk and Interest Rate Swaps

We are exposed to interest rate risk arising from fluctuations in variable-rate LIBOR on our term loans and when we have loan amounts outstanding on our Revolving Credit Facility. Our objective is to limit the variability of interest payments on our debt. To meet this objective, in 2016 we entered into receive-variable, pay-fixed interest rate swaps to change the variable-rate cash flow exposure to fixed-rate cash flows. In accordance with our risk management strategy, we actively monitor our interest rate exposure and consider using derivative instruments from time to time to manage the related risk.

On February 16, 2016, and March 31, 2016, we entered into interest rate swap agreements with notional principal amounts of $50.0 million and $75.0 million, respectively, to offset risks associated with the variability in cash flows relating to interest payments that are based on one-month LIBOR. We do not speculate using derivative instruments. At December 31, 2016, the notional principal amount of our interest rate swap agreements exceeded the $95.0 million of variable-rate debt outstanding after paying down $30.0 million of variable rate debt on our Term Loan in December 2016. The excess notional principal amount of our interest rate swaps over our variable-rate debt is within our management strategy as we expect to partially fund seasonal and intra-month working capital requirements in 2017 from borrowings under our Revolving Credit Facility.

Under the interest rate swaps, we receive LIBOR-based variable interest rate payments and make fixed interest rate payments, thereby fixing the interest rate on $125.0 million of debt. Payments on the interest rate swaps with notional principal amounts of $50.0 million and $75.0 million are due on a monthly basis at a fixed rate of 1.007% and 1.256%, respectively, and expire in February 2022 and March 2022, respectively. The interest rate swap agreements were not designated as cash flow hedges, and as a result, all changes in the fair value are recognized in "Change in fair value of interest rate swaps" in the Consolidated Statements of Operations rather than through other comprehensive income. At December 31, 2016, we recorded a long-term asset of $4.2 million in "Other assets" on our Consolidated Balance Sheets, representing the fair value of the interest rate swap agreements. The swaps were valued based on observable inputs for similar assets and liabilities and other observable inputs for interest rates and yield curves (Level 2 inputs).

Foreign Currency Risk
    
We have sales in countries outside the U.S. As a result, we are exposed to movements in foreign currency exchange rates, primarily in Canada, but we do not believe our exposure to currency fluctuations is significant.

Commodity Price Risk

Many of the products we manufacture or purchase and resell and some of our key production inputs are commodities whose price is determined by the market's supply and demand for such products. Price fluctuations in our selling prices and key costs have a significant effect on our financial performance. The markets for most of these commodities are cyclical and are primarily affected by various economic and industry factors, including the strength of the U.S. housing market, net import and export activity, changes in or disruptions to industry production capacity, changes in inventory levels, and other factors beyond our control.