Leases (Components Right Of Use Assets) (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Finance Lease [Abstract]
Building and Improvements	$ 125,547
Furniture and equipment	21,113
Rental trailers and rental equipment	116,072
Rental trucks	1,738,081
Right Of Use Assets Gross	2,000,813
less: accumulated depreciation	(813,829)
Right of use assets, net	1,186,984
Finance Lease [Member]
Finance Lease [Abstract]
Building and Improvements	0
Furniture and equipment	21,113
Rental trailers and rental equipment	116,072
Rental trucks	1,738,081
Right Of Use Assets Gross	1,875,266
less: accumulated depreciation	(794,913)
Right of use assets, net	1,080,353
Operating Lease [Member]
Finance Lease [Abstract]
Building and Improvements	125,547
Furniture and equipment	0
Rental trailers and rental equipment	0
Rental trucks	0
Right Of Use Assets Gross	125,547
less: accumulated depreciation	(18,916)
Right of use assets, net	$ 106,631