Subsequent events: (Details) - Senior secured 2032 notes - USD ($) |
1 Months Ended | 3 Months Ended | 6 Months Ended | |
|---|---|---|---|---|
Jul. 31, 2026 |
Sep. 30, 2026 |
Jun. 30, 2026 |
Jun. 30, 2026 |
|
| Subsequent events: | ||||
| Repayments of debt | $ 19,300,000 | |||
| Aggregate principal amount | 20,400,000 | $ 20,400,000 | ||
| Average redemption price | 91.955 | |||
| Gain on debt extinguishment and redemption | $ 1,579,000 | $ 1,579,000 | ||
| Subsequent Events | ||||
| Subsequent events: | ||||
| Repayments of debt | $ 106,700,000 | |||
| Aggregate principal amount | 118,400,000 | |||
| Average redemption price | 90.071 | |||
| Gain on debt extinguishment and redemption | $ 11,800,000 | |||
| Cumulative amount of debt instrument redeemed and retired | 138,800,000 | |||
| Total repurchases under supplemental indenture | $ 175,000,000 | |||