| Schedule of long-term debt |
Long-term debt consists of the following: | | | | | | | | | | | | | (in thousands) | June 30, 2020 | | December 31, 2019 | 9.25% Senior Secured Notes, due June 2023 (1) | $ | 645,000 | | | $ | 645,000 | | 6.50% Notes, due April 2021, net of current portion (2) | — | | | 2,240 | | | | | | | Unamortized discount and debt issuance costs | (12,993) | | | (14,834) | | | Total long-term debt, net of current portion | $ | 632,007 | | | $ | 632,406 | | | Current portion of long-term debt (3) | 2,240 | | | — | | | Total long-term debt, including current portion | $ | 634,247 | | | $ | 632,406 | |
(1)The estimated fair value of long-term debt outstanding was approximately $632.1 million and $673.8 million as of June 30, 2020 and December 31, 2019, respectively. (2)The 6.50% Notes, due April 2021, mature within 12 months, and, therefore, the outstanding balance of $2.2 million has been classified as short-term as of June 30, 2020. (3)Amounts reported in Other current liabilities.
Credit Facility | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (in thousands) | Total Capacity | | Amount Borrowed as of June 30, 2020 | | Outstanding Letters of Credit | | Available Capacity as of June 30, 2020 | | Maturity Date | | Asset Based (AB) Credit Facility (4) | $ | 45,550 | | | $ | — | | | $ | — | | | $ | 45,550 | | | September 30, 2021 |
|