Description of the business: - Restricted cash and interest rate swap agreement (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Description of the business and summary of significant accounting policies:
Restricted cash	$ 14,440	$ 56,597
Secured IPv4 notes
Description of the business and summary of significant accounting policies:
Restricted cash	$ 14,400	52,500
Interest rate swap
Description of the business and summary of significant accounting policies:
Fair value of interest rate swaps		4,300
Interest rate swap \| Level 2 \| Restricted cash
Description of the business and summary of significant accounting policies:
Fair value of interest rate swaps		$ 4,100

Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.