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Debt and Interest Rate Swap (Tables) | 12 Months Ended
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Dec. 31, 2019
Debt Disclosure [Abstract] |
Schedule of Debt [Table Text Block] | The carrying amount of the Company's long-term debt consists of the following:
| December 31, 2019 |  | December 31, 2018
| (in thousands)
Principal | $ | 212,000 |  |  | $ | 262,000 |
Less: |  |  |
Unamortized debt discount | (1,328 | ) |  | (1,630 | )
Unamortized debt issuance costs | (3,763 | ) |  | (4,613 | )
Net carrying amount of long-term debt | 206,909 |  |  | 255,757 |
Less: current portion of long-term debt | — |  |  | — |
Long-term debt, non-current portion | $ | 206,909 |  |  | $ | 255,757 |

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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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