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LONG-TERM DEBT (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
LONG-TERM DEBT |
Schedule of long-term debt | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2023 |  | 2022
Convertible Notes due 2028 | ​ | $ | 575,000 | ​ | $ | —
Term Loan Facility due 2026 | ​ | ​ | 355,000 | ​ | ​ | 375,000
Gross long-term debt, including current maturities | ​ | ​ | 930,000 | ​ | ​ | 375,000
Less: debt discount | ​ | ​ | (14,321) | ​ | ​ | (1,738)
Net long-term debt, including current maturities | ​ | ​ | 915,679 | ​ | ​ | 373,262
Less: current maturities | ​ | ​ | (20,000) | ​ | ​ | (20,000)
Net long-term debt | ​ | $ | 895,679 | ​ | $ | 353,262
Schedule of contractual maturities of gross long-term debt | ​
​ | ​ | ​ | ​
Year Ending December 31, |  | ​
2024 | ​ | $ | 20,000
2025 | ​ | ​ | 20,000
2026 | ​ | ​ | 315,000
2027 | ​ | ​ | —
2028 | ​ | ​ | 575,000
Total | ​ | $ | 930,000
Schedule of borrowings under credit facility | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2023
​ | ​ | Balance |  | Interest Rate
Convertible Notes | ​ | $ | 575,000 | ​ | 2.50%
Term Loan Facility at fixed interest rate due to interest rate swap | ​ | ​ | 220,719 | ​ | 1.17%
Term Loan Facility at variable interest rate | ​ | ​ | 134,281 | ​ | 6.21%
Total borrowings | ​ | $ | 930,000 | ​ | ​
Schedule of interest expense and unused line of credit fees | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Years Ended December 31,
​ |  | ​ | 2023 |  | 2022 |  | 2021
Interest expense | ​ | ​ | $ | 15,186 | ​ | $ | 6,607 | ​ | $ | 3,969
Amortization of debt issuance costs | ​ | ​ | ​ | 1,330 | ​ | ​ | 547 | ​ | ​ | 822
Total interest expense related to debt | ​ | ​ | $ | 16,516 | ​ | $ | 7,154 | ​ | $ | 4,791
Schedule of availability to withdraw on Revolving Facility | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2023 |  | 2022
Available capacity on Revolving Facility | ​ | $ | 200,000 | ​ | $ | 200,000

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