Reportable Segment Information - (Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Assets [Abstract]
Total assets	$ 21,617,644	$ 20,479,170	$ 20,330,165
Operating Segments [Member] | Moving and Storage Consolidations [Member]
Assets [Abstract]
Total assets	18,717,342	17,522,952
Operating Segments [Member] | Property and Casualty Insurance [Member]
Assets [Abstract]
Total assets	580,267	535,032
Operating Segments [Member] | Life Insurance [Member]
Assets [Abstract]
Total assets	3,071,603	3,066,907
Intersegment Eliminations [Member]
Assets [Abstract]
Total assets	$ (751,568)	$ (645,721)