Leases (Components of our right-of-use assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Finance Lease [Abstract]
Buildings and Improvements	$ 79,317	$ 128,221
Furniture and equipment	61	9,687
Rental trailers and other rental equipment	114,607	152,294
Rental trucks	607,521	949,838
Right-of-use assets, gross	801,506	1,240,040
Less: Accumulated depreciation	(458,489)	(706,358)
Right of use assets, net	343,017	533,682
Finance Lease [Member]
Finance Lease [Abstract]
Buildings and Improvements	0	0
Furniture and equipment	61	9,687
Rental trailers and other rental equipment	114,607	152,294
Rental trucks	607,521	949,838
Right-of-use assets, gross	722,189	1,111,819
Less: Accumulated depreciation	(432,884)	(637,054)
Right of use assets, net	289,305	474,765
Operating Lease [Member]
Finance Lease [Abstract]
Buildings and Improvements	79,317	128,221
Furniture and equipment	0	0
Rental trailers and other rental equipment	0	0
Rental trucks	0	0
Right-of-use assets, gross	79,317	128,221
Less: Accumulated depreciation	(25,605)	(69,304)
Right of use assets, net	$ 53,712	$ 58,917