Debt

Collectively, our credit facility is comprised of a term loan with a face amount of $545.0 million, maturing on October 19, 2022 (the “Senior Secured Term Loan”); a term loan with a face amount of $300.0 million, maturing on April 3, 2021 (the Incremental Term Loan”); and a revolving line of credit with a face amount of $110.0 million, maturing on October 19, 2020 (the “Senior Secured Revolver”). The credit facility is collateralized by all of our assets.

The following table presents debt balances as of June 30, 2019, and December 31, 2018.



	June 30, 2019		December 31, 2018
Senior Secured Term Loan	$	529,188	$	532,063
Incremental Term Loan	273,000		279,000
Senior Secured Revolver	76,382		38,720
International lines of credit and other loans	9,683		9,810
Total principal	888,253		859,593
Less—current maturities of long-term debt	25,115		31,280
Principal, net of current portion	863,138		828,313
Less—unamortized debt issuance costs	12,762		16,842
Long-term debt, net of current portion	$	850,376	$	811,471

We capitalized interest costs amounting to $0.5 million and $0.3 million in the three months ended June 30, 2019 and 2018, respectively, and $1.1 million and $0.5 million in the six months ended June 30, 2019 and 2018, respectively, related to construction in progress.

Senior Secured Term Loan

Outstanding borrowings under the Senior Secured Term Loan bear interest at the greater of 0.75% or one-month London Interbank Offered Rate (“LIBOR”) plus an applicable margin of 3.75%. At June 30, 2019, the Senior Secured Term Loan bore interest at 6.15%.

Incremental Term Loan

Outstanding borrowings under the Incremental Term Loan bear interest at one-month LIBOR plus an applicable margin of 3.25%. At June 30, 2019, the Incremental Term Loan bore interest of 5.65%.

Senior Secured Revolver

Outstanding borrowings under the Senior Secured Revolver bear interest on a variable rate structure with borrowings bearing interest at either one-month LIBOR plus an applicable margin of 3.50% or the prime lending rate plus an applicable margin of 2.50%. At June 30, 2019, the weighted average interest rate on outstanding borrowings under the Senior Secured Revolver was 6.02%. We pay an annual commitment fee of 0.50% for unused capacity under the Senior Secured Revolver on a quarterly basis.

On March 15, 2019, we amended our existing credit facility (the “March 2019 amendment”) to amend the defined terms within the credit facility. We paid $0.8 million of debt issuance costs related to the March 2019 amendment, which was recorded as a direct reduction to the carrying amount of the associated long-term debt. Additionally, $2.7 million of unamortized debt issuance costs related to the modification of the credit facility were written off.

On June 11, 2019, we amended our existing credit facility (the “June 2019 amendment”) to reduce the total available capacity under the Senior Secured Revolver from $125.0 million to $100.0 million, reduce the maximum capacity from $143.0 million to $110.0 million, and modify the consolidated net leverage ratio, as defined in the credit facility agreement, which is utilized for certain financial covenants. We paid $0.2 million of debt issuance costs related to the June 2019 amendment, which was recorded as a direct reduction to the carrying amount of the associated long-term debt.

We had $76.4 million outstanding under the Senior Secured Revolver at June 30, 2019. Total capacity under the Senior Secured Revolver was $100.0 million as of June 30, 2019 with $11.5 million available for future borrowings after reductions for outstanding letters of credit and outstanding borrowings as of June 30, 2019. Our credit facility is subject to certain financial covenants based on a consolidated net leverage ratio. The financial covenants are effective when we have outstanding borrowings under our Senior Secured Revolver on the last day of any fiscal quarter, become more restrictive over time, and are dependent upon our operational and financial performance. If our operational or financial performance does not improve in line with our expectations, we may be required to take actions to reduce expenditures and decrease our net indebtedness to maintain compliance in future periods. We were in compliance with all covenants under our credit facility at June 30, 2019.

Our Senior Secured Revolver matures on October 19, 2020, which will require us to either extend the maturity date of the Senior Secured Revolver, generate sufficient cash flow through improved operational performance or other means to pay off any outstanding balance on the Senior Secured Revolver or seek additional forms of financing prior to the maturity date. Our ability to restructure or refinance our debt will depend on the condition of the capital markets and our financial condition at such time. If we are unable to extend the maturity date or refinance amounts due under our Senior Secured Revolver, or our operational performance fails to generate sufficient cash flows, we may be required to take additional actions to address our liquidity needs.

Derivative Instruments and Hedging Activities

In February 2019, we entered into a $700.0 million amortizing notional amount fixed-rate interest rate swap agreement to manage the interest rate risk associated with our long-term variable-rate debt until 2022. The fixed-rate interest rate swap agreement calls for us to receive interest monthly at a variable rate equal to one-month LIBOR and to pay interest monthly at a fixed rate of 2.4575%. Refer to Note 16 for further discussion of the interest rate swap agreement.