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Debt (Tables) | 12 Months Ended
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Dec. 31, 2018
Debt Instruments [Abstract] |
Schedule of Annual Principal Payments on Long-Term Debt | Annual principal payments on long-term debt at December 31, 2018, are as follows (in thousands):
Years Ending December 31, |  | Amount
﻿ |  |  |
2019 |  | — |
2020 |  | — |
2021 |  | 50,000 |
2022 |  | 75,000 |
2023 |  | 75,000 |
Thereafter |  | 401,777 |
﻿ |  | $ | 601,777 |

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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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