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Long-term debt: (Tables) | 12 Months Ended
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Dec. 31, 2024
Long-term debt: |
Schedule of aggregate future contractual maturities of long-term debt | The aggregate future contractual maturities of long-term debt were as follows as of December 31, 2024 (in thousands): ​
​ | ​ | ​ | ​
For the year ending December 31, |  | ​ | ​
2025 | ​ | $ | —
2026 | ​ |  | 500,000
2027 | ​ |  | 750,000
2028 | ​ |  | —
2029 | ​ |  | 206,000
Thereafter | ​ |  | —
Total | ​ | $ | 1,456,000

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- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 470 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-1 + Details
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