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Note 9 - Leases (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Lease Balance Sheet Disclosure [Table Text Block] |
|  | December 31, |
|  | 2024 |  |  | 2023 |
Operating lease ROU assets: |  |  |  |  |  |
Other non-current assets |  | $ | 84.1 |  |  | $ | 69.5 |
​ |  | ​ |  |  | ​ |
Operating lease liabilities: |  | ​ |  |  | ​ |
Accounts payable and accrued liabilities |  | $ | 16.5 |  |  | $ | 23.0 |
Other non-current liabilities |  |  | 74.9 |  |  |  | 54.8 |
Total operating lease liabilities |  | $ | 91.4 |  |  | $ | 77.8 |
Lease, Cost [Table Text Block] |
​ |  | Year ended December 31, |
​ |  | 2024 |  |  | 2023 |  |  | 2022 |
Operating lease cost(2) |  | $ | 19.9 |  |  | $ | 22.6 |  |  | $ | 27.5 |
​ |  | Year ended December 31, |
​ |  | 2024 |  |  | 2023 |  |  | 2022 |
Operating cash flows from operating leases |  | $ | 27.7 |  |  | $ | 29.4 |  |  | $ | 26.9 |
​ |  | As of December 31, |
Weighted-average remaining lease term (in months): |  | 2024 |  |  | 2023 |
Operating leases |  |  | 63 |  |  |  | 51 |
Finance leases |  |  | 39 |  |  |  | 37 |
​ |  | As of December 31, |
Weighted-average discount rate(1): |  | 2024 |  |  | 2023 |
Operating leases |  |  | 4.3 | % |  |  | 2.5 | %
Finance leases |  |  | 5.3 | % |  |  | 4.0 | %
Schedule of Lease Liability Maturity [Table Text Block] |
Future lease obligations (in millions)(1): |  | Operating leases |
2025 |  | $ | 17.9 |
2026 |  | 19.3 |
2027 |  |  | 18.7 |
2028 |  | 19.7 |
2029 |  |  | 10.5 |
Thereafter |  |  | 19.8 |
Total lease payments |  |  | 105.9 |
Less interest |  |  | 14.5 |
Total |  | $ | 91.4 |

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- Definition The tabular disclosure of lease balance sheet. + References No definition available. + Details
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- Definition Tabular disclosure of undiscounted cash flows of lease liabilities. Includes, but is not limited to, reconciliation of undiscounted cash flows to lease liability recognized in statement of financial position. + References No definition available. + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- References No definition available. + Details
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