Reportable Segment Information - Revenues and Earnings from Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Revenues [Abstract]
Total revenues	$ 5,625,674	$ 5,864,691	$ 5,739,747
Income (Loss) Attributable to Parent, before Tax, Total	977,789	1,445,580	1,646,073
Operating Segments [Member] | Moving and Storage Consolidations [Member]
Revenues [Abstract]
Total revenues	5,294,928	5,567,714	5,398,267
Income (Loss) Attributable to Parent, before Tax, Total	896,140	1,396,122	1,577,226
Operating Segments [Member] | Property and Casualty Insurance [Member]
Revenues [Abstract]
Total revenues	123,085	103,512	115,043
Income (Loss) Attributable to Parent, before Tax, Total	62,509	36,570	49,780
Operating Segments [Member] | Life Insurance [Member]
Revenues [Abstract]
Total revenues	219,202	206,100	238,812
Income (Loss) Attributable to Parent, before Tax, Total	20,152	14,409	20,614
Intersegment Eliminations [Member]
Revenues [Abstract]
Total revenues	11,541	12,635	12,375
Income (Loss) Attributable to Parent, before Tax, Total	$ 1,012	$ 1,521	$ 1,547