Acquisitions and Dispositions of Businesses (Acquired assets and liabilities assumed) (Details 1) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 1,649,582	$ 1,484,750	$ 1,388,279
Floor plan payables			(25,800)
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Accounts receivable	18,835	745	6,762
Inventory	25,420	3,496	34,134
Property, plant and equipment	12,661	3,346	56,391
Lease right-of-use assets	26,333	6,580	98,505
Goodwill	205,003	73,951	84,669
Indefinite-lived intangible assets	22,200	0	46,900
Amortized intangible assets	100,800	14,589	21,291
Other assets	4,899	975	8,308
Deferred income tax asset	42,850	15,958
Deferred income tax liability			(2,703)
Floor plan payables	(16,198)	0	(25,755)
Other liabilities	(52,421)	(14,917)	(42,555)
Current and noncurrent lease liabilities	(26,286)	(6,593)	(99,131)
Redeemable noncontrolling interest	(6,617)	(6,005)	(1,715)
Noncontrolling interest	0	0	(1,154)
Aggregate purchase price, net of cash acquired	$ 357,479	$ 92,125	$ 183,947