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Financing Arrangements (Tables) | 6 Months Ended
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Jun. 30, 2019
Debt Disclosure [Abstract] |
Schedule of Maturities of Long-term Debt [Table Text Block] | The following table presents the Company's combined aggregate amount of maturities for its Equipment Note and Term-Loan Facility over the next five years and thereafter as of June 30, 2019. Amounts payable under the Term Loan Facility included below represent the minimum principal repayment obligations. As of June 30, 2019, the Company does not anticipate excess cash flow repayments as defined by the Term Loan Facility.
|  | (in thousands)
Remainder of 2019 |  | $ | 3,698 |
2020 |  | 7,396 |
2021 |  | 7,396 |
2022 |  | 7,396 |
2023 |  | 4,800 |
2024 |  | 4,800 |
Thereafter |  | $ | 452,600 |

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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