| Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
| | | Contract Liabilities | |
| (In thousands) | | | (unaudited) | |
| Balance as of December 31, 2025 | | $ | 231,643 | |
| Recognized in tour revenues during the period | | | (387,934 | ) |
| Additional contract liabilities in period | | | 452,358 | |
| Balance as of June 30, 2026 | | $ | 296,067 | |
|
| Disaggregation of Revenue [Table Text Block] |
| | | For the three months ended June 30, | | | For the six months ended June 30, | |
| Lindblad Segment | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| (In thousands) | | (unaudited) | | | (unaudited) | |
| Guest ticket revenue: | | | | | | | | | | | | | | | | |
| Direct | | $ | 81,864 | | | $ | 68,157 | | | $ | 166,180 | | | $ | 147,012 | |
| Agencies | | | 31,500 | | | | 30,018 | | | | 71,368 | | | | 63,813 | |
| Guest ticket revenue | | | 113,364 | | | | 98,175 | | | | 237,548 | | | | 210,825 | |
| Other tour revenue | | | 15,868 | | | | 12,870 | | | | 44,173 | | | | 31,328 | |
| Tour revenues | | $ | 129,232 | | | $ | 111,045 | | | $ | 281,721 | | | $ | 242,153 | |
| | | | | | | | | | | | | | | | | |
| | | For the three months ended June 30, | | | For the six months ended June 30, | |
| Land Experiences Segment | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| (In thousands) | | (unaudited) | | | (unaudited) | |
| Guest ticket revenue: | | | | | | | | | | | | | | | | |
| Direct | | $ | 60,840 | | | $ | 48,470 | | | $ | 106,277 | | | $ | 90,136 | |
| Agencies | | | 7,484 | | | | 5,768 | | | | 12,984 | | | | 9,779 | |
| Guest ticket revenue | | | 68,324 | | | | 54,238 | | | | 119,261 | | | | 99,915 | |
| Other tour revenue | | | 1,691 | | | | 2,662 | | | | 6,278 | | | | 5,598 | |
| Tour revenues | | $ | 70,015 | | | $ | 56,900 | | | $ | 125,539 | | | $ | 105,513 | |
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