Leases (Components Right Of Use Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Finance Lease [Abstract]
Building and Improvements	$ 136,444	$ 132,901
Furniture and equipment	14,731	22,316
Rental trailers and rental equipment	169,514	203,594
Rental trucks	1,114,248	1,494,098
Right Of Use Assets Gross	1,434,937	1,852,909
less: accumulated depreciation	(739,731)	(883,366)
Right of use assets, net	695,206	969,543
Finance Lease [Member]
Finance Lease [Abstract]
Building and Improvements	0	0
Furniture and equipment	14,731	22,316
Rental trailers and rental equipment	169,514	203,594
Rental trucks	1,114,248	1,494,098
Right Of Use Assets Gross	1,298,493	1,720,008
less: accumulated depreciation	(677,669)	(842,970)
Right of use assets, net	620,824	877,038
Operating Lease [Member]
Finance Lease [Abstract]
Building and Improvements	136,444	132,901
Furniture and equipment	0	0
Rental trailers and rental equipment	0	0
Rental trucks	0	0
Right Of Use Assets Gross	136,444	132,901
less: accumulated depreciation	(62,062)	(40,396)
Right of use assets, net	$ 74,382	$ 92,505