Leases Operating Lease Revenue and Rental Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Gross property and equipment		$ 3,742,739	[1]	$ 3,305,944
Less: accumulated depreciation and amortization		(892,019)	[1]	$ (693,107)
Operating lease revenue		46,858
Variable lease revenue		2,169
Revenue Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment		91,600
Less: accumulated depreciation and amortization		(18,600)
Depreciation		16,400
Total lease revenue ¹	[2]	49,027
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Operating lease revenue	[3]	$ 9,982

[1] Amounts represent reclassification of operating lease liabilities to finance lease liabilities, as the Company became reasonably certain to purchase certain revenue equipment off of operating leases during 2019.

[2] Primarily represents operating revenue earned by the Company's financing subsidiaries for leasing equipment to third-party independent contractors.

[3] Represents non-operating income earned from leasing real estate to third parties.