Description of the business and summary of significant accounting policies: - IRU finance lease termination - discount and gain on lease termination (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) M	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Description of the business and summary of significant accounting policies:
Weighted-average discount rate - finance leases		8.40%	8.10%	7.60%
Lease payments		$ 33,843	$ 74,632	$ 77,362
Finance lease liability		623,351
Total principal payments		$ 1,159,080
IRU finance lease termination
Description of the business and summary of significant accounting policies:
Weighted-average discount rate - finance leases	12.00%
Lease payments	$ 114,600
Finance lease liability	$ 117,900
Number of monthly installments \| M	31
Lease monthly payments	$ 4,200
Total principal payments	130,200
Gains on lease terminations	$ 3,300

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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