Leases (Components of our right-of-use assets) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Finance Lease [Abstract]
Buildings and Improvements	$ 132,011
Furniture and equipment	20,966
Rental trailers and other rental equipment	106,961
Rental trucks	1,614,194
Right-of-use assets, gross	1,874,132
Less: Accumulated depreciation	(856,625)
Right of use assets, net	1,017,507
Finance Lease [Member]
Finance Lease [Abstract]
Buildings and Improvements	0
Furniture and equipment	20,966
Rental trailers and other rental equipment	106,961
Rental trucks	1,614,194
Right-of-use assets, gross	1,742,121
Less: Accumulated depreciation	(821,800)
Right of use assets, net	920,321
Operating Lease [Member]
Finance Lease [Abstract]
Buildings and Improvements	132,011
Furniture and equipment	0
Rental trailers and other rental equipment	0
Rental trucks	0
Right-of-use assets, gross	132,011
Less: Accumulated depreciation	(34,825)
Right of use assets, net	$ 97,186