8.Long-Term Debt

Long-term debt is summarized below:

At June 30, 2018, the Company had outstanding borrowings under the Term Loan Credit Agreement of $279,456,  no outstanding borrowings on the Revolving Credit Agreement and remaining borrowing availability of $83,918.  At December 31, 2017, the Company had outstanding borrowings under the Term Loan Credit Agreement of $310,830,  no outstanding borrowings on the Revolving Credit Agreement and remaining borrowing availability of $99,463. 

In accordance with the senior credit facilities, the Company is required to make additional principal prepayments over the above scheduled payments under certain conditions. This includes, in the case of the term loan facility, 100% of the net cash proceeds of certain asset sales, certain insurance or condemnation events, certain debt issuances, and, within 150 days of the end of each fiscal year, 50% of consolidated excess cash flow including a deduction for certain distributions (which percentage is reduced to 0% upon the achievement of certain leverage ratio thresholds), for such fiscal year. Consolidated excess cash flow is defined in the senior credit facilities as consolidated adjusted EBITDA (earnings before interest, taxes, depreciation and amortization) plus a consolidated working capital adjustment, less the sum of repayments of debt and capital expenditures (subject to certain adjustments), interest and taxes paid in cash, management fees and certain restricted payments (including certain dividends or distributions). Consolidated working capital adjustment is defined in the senior credit facilities as the change in working capital, defined as current assets, excluding cash and cash equivalents, less current liabilities, excluding the current portion of long term debt.  As of June 30, 2018, the Company was not required to make additional excess cash flow payments during fiscal 2018. The Company made a required excess cash flow payment of $11,279 and a voluntary payment of $18,721 on January 31, 2018.

The Company entered into interest rate swap agreements on February 20, 2015 to reduce its exposure to interest rate volatility.  The three interest rate swap agreements have notional amounts of $45,000,  $90,000 and $135,000 effective for the periods December 31, 2015 through March 29, 2018, March 29, 2018 through March 31, 2020 and March 31, 2020 through June 30, 2021, respectively.  On February 5, 2018, the Company entered into additional interest rate swap agreements to reduce its exposure to interest rate volatility. The two interest rate swap agreements have notional amounts of $50,000 and $150,000 effective for the periods December 31, 2018 through June 30, 2021 and June 30, 2021 through December 10, 2021, respectively. The interest rates swaps are accounted for as cash flow hedges. The Company may have counterparty credit risk resulting from the interest rate swap, which it monitors on an on-going basis. This risk lies with one global financial institution.  Under the interest rate swap agreement, effective as of December 31, 2015, the Company either received or made payments on a monthly basis based on the differential between 6.105% and LIBOR plus 3.00% (with a LIBOR floor of 1.0%).  Under the interest rate swap agreement, effective as of March 29, 2018, the Company will either receive or make payments on a monthly basis based on the differential between 6.916% and LIBOR plus 3.00% (with a LIBOR floor of 1.0%).  Under the interest rate swap agreement, effective as of March 31, 2020, the Company will either receive or make payments on a monthly basis based on the differential between 7.168% and LIBOR plus 3.00% (with a LIBOR floor of 1.0%).  Under the interest rate swap agreement effective as of December 31, 2018, the Company will either receive or make payments on a monthly basis based on the differential between 2.613% and LIBOR. Under the interest rate swap agreement effective as of June 30, 2021, the Company will either receive or make payments on a monthly basis based on the differential between 2.793% and LIBOR. The interest rate swaps’ negative fair value at June 30, 2018 was $3, of which $262 and $259 are included in Accrued expenses and other current liabilities and Other long-term assets on the Condensed Consolidated Balance Sheet, respectively.  The interest rate swaps’ negative fair value at December 31, 2017 was $2,178, of which $597 and $1,581 are included in Accrued expenses and other current liabilities and Other long-term liabilities on the Condensed Consolidated Balance Sheet, respectively.