Segments Information - Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Revenue:
Total assets	$ 4,998,967	$ 4,863,277	$ 4,688,992
Subtotal
Revenue:
Total assets	4,987,947	4,631,385	4,453,208
Corporate & other
Revenue:
Total assets	11,020	231,892	235,784
Good Sam Services and Plans | Operating Segments
Revenue:
Total assets	85,476	121,876	87,087
RV and Outdoor Retail | Operating Segments
Revenue:
Total assets	$ 4,902,471	$ 4,509,509	$ 4,366,121