v3.25.1
Long-term debt: - Limitations under the Indentures (Details)
3 Months Ended
Mar. 31, 2025
USD ($)
Long-term debt  
Consolidated leverage ratio 6.0
Fixed charge coverage ratio 2.0
Consolidated secured leverage ratio 4.0
Amount unrestricted and permitted for investment payments $ 187,200,000
Restriction on incurring additional indebtedness | Senior unsecured 2024 Notes | Minimum  
Long-term debt  
Consolidated secured leverage ratio 1.0
Restriction on incurring additional indebtedness | Senior unsecured 2024 Notes | Maximum  
Long-term debt  
Consolidated secured leverage ratio 4.0
Restriction on incurring additional indebtedness | Senior secured 2026 Notes | Minimum  
Long-term debt  
Consolidated leverage ratio 1.0
Fixed charge coverage ratio 1.0
Consolidated secured leverage ratio 1.0
Restriction on incurring additional indebtedness | Senior secured 2026 Notes | Maximum  
Long-term debt  
Consolidated leverage ratio 6.0
Fixed charge coverage ratio 2.0
Consolidated secured leverage ratio 4.0
Restriction on dividends and stock purchases | Senior unsecured 2024 Notes | Minimum  
Long-term debt  
Indebtedness that may occur $ 1
Restriction on dividends and stock purchases | Senior secured 2026 Notes | Minimum  
Long-term debt  
Consolidated leverage ratio 1.0
Fixed charge coverage ratio 1.0
Restriction on dividends and stock purchases | Senior secured 2026 Notes | Maximum  
Long-term debt  
Consolidated leverage ratio 2.0
Fixed charge coverage ratio 6.0