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LONG-TERM DEBT (Tables) | 12 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Long-Term Debt | Long-term debt consists of the following (in thousands):
| December 31, 2018 |  | December 31, 2017
Senior notes due 2025 | $ | 325,000 |  |  | $ | 325,000 |
Term loan credit agreement | 185,699 |  |  | 187,579 |
Convertible senior notes due 2018 | — |  |  | 44,561 |
Other debt | — |  |  | 93 |
| 510,699 |  |  | 557,233 |
Less: unamortized discount and fees | (5,801 | ) |  | (7,122 | )
Less: current portion | (1,880 | ) |  | (46,020 | )
| $ | 503,018 |  |  | $ | 504,091 |
Contractual Coupon Interest Expense and Accretion Of Discount On Liability | Contractual coupon interest expense and accretion of discount and fees on the liability component for the Convertible Notes for the years ended December 31, 2018, 2017 and 2016 included in Interest Expense on the Company’s Consolidated Statements of Operations were as follows (in thousands):
| Years Ended December 31,
| 2018 |  | 2017 |  | 2016
Contractual coupon interest expense | $ | 470 |  |  | $ | 1,570 |  |  | $ | 3,198 |
Accretion of discount and fees on the liability component | $ | 461 |  |  | $ | 1,537 |  |  | $ | 2,902 |

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