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Debt and Finance Lease Obligations - Schedule of Long-term Debt and Finance Lease Obligations (Parenthetical) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |
Weighted average interest rate on long term debt | 5.80% | 4.50%
Current revolving credit facility maturity period | 1 year | 1 year
FlyOver Iceland Credit Facility |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate on long term debt | 4.90% |
2018 Credit Agreement | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Interest rate on credit facility | 4.30% | 4.30%

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- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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