Basis of Presentation - Exchange Agreement with Chairman (Details)	Sep. 30, 2024 shares
Series B common stock
Cumulative shares converted	481,149

The cumulative number of shares converted in a noncash (or part noncash) transaction.

No definition available.

Name:	lbrda_ConversionOfStockSharesConvertedCumulative
Namespace Prefix:	lbrda_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant