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Debt Obligations (Tables) | 12 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Schedule of debt obligations |
|  | As of December 31,
(in thousands) |  | 2021 |  | 2020
Credit Facility: |  |  |  |
Revolving credit agreement |  | $ | 283,400 |  |  | $ | 270,400 |
Convertible Debt: |  |  |  |
0.75% convertible notes, unsecured, due 2049 |  | 468,235 |  |  | 452,228 |
1.375% Senior Notes, due 2026 |  | 682,080 |  |  | 732,840 |
Other obligations |  | 920 |  |  | 850 |
Total debt obligations |  | $ | 1,434,635 |  |  | $ | 1,456,318 |
Unamortized debt issuance costs |  | (13,729 | ) |  | (17,932 | )
Carrying value of debt |  | $ | 1,420,906 |  |  | $ | 1,438,386 |
Short-term debt obligations and current maturities of long-term debt obligations |  | (821 | ) |  | (797 | )
Long-term debt obligations |  | $ | 1,420,085 |  |  | $ | 1,437,589 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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