Acquisitions and Dispositions of Businesses (Acquired assets and liabilities assumed) (Details 1) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill	$ 1,525,194	$ 1,560,953	$ 1,649,582
Floor plan payables	(148,300)	(69,756)
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Accounts receivable	68	3,172	17,878
Inventory	5,224	21,278	25,383
Property, plant and equipment	29,859	36,255	13,126
Lease right-of-use assets	0	4,773	25,890
Goodwill	45,968	53,946	204,151
Indefinite-lived intangible assets	6,300	41,800	22,200
Amortized intangible assets	235	1,200	99,800
Other assets	4	404	4,911
Deferred income tax asset	0	2,535	44,975
Floor plan payables	(2,215)	(10,908)	(16,636)
Other liabilities	(935)	(3,798)	(52,567)
Current and noncurrent lease liabilities	(1,184)	(5,865)	(25,593)
Redeemable noncontrolling interest	0	(2,164)	(6,616)
Noncontrolling interest	0	(512)	0
Aggregate purchase price, net of cash acquired	$ 83,324	$ 142,116	$ 356,902