Leases (Components of our right-of-use assets) (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024
Finance Lease [Abstract]
Buildings and Improvements	$ 81,571	$ 79,317,000
Furniture and equipment	61	61,000
Rental trailers and other rental equipment	104,092	114,607,000
Rental trucks	585,415	607,521,000
Right-of-use assets, gross	771,139	801,506,000
Less: Accumulated depreciation	(452,140)	(458,489,000)
Right of use assets, net	318,999	343,017,000
Finance Lease [Member]
Finance Lease [Abstract]
Furniture and equipment	61	61,000
Rental trailers and other rental equipment	104,092	114,607,000
Rental trucks	585,415	607,521,000
Right-of-use assets, gross	689,568	722,189,000
Less: Accumulated depreciation	(423,824)	(432,884,000)
Right of use assets, net	265,744	289,305,000
Operating Lease [Member]
Finance Lease [Abstract]
Buildings and Improvements	81,571	79,317,000
Right-of-use assets, gross	81,571	79,317,000
Less: Accumulated depreciation	(28,316)	(25,605,000)
Right of use assets, net	$ 53,255	$ 53,712,000