Acquisitions and Dispositions of Businesses (Assets Acquired and Liabilities Assumed) (Details 1) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill	$ 1,513,316	$ 1,525,194
Floor plan payables	$ (175,103)	(148,300)
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Accounts receivable		68
Inventory		5,224
Property, plant and equipment		29,859
Goodwill		45,968
Indefinite-lived intangible assets		6,300
Amortized intangible assets		235
Other assets		4
Floor plan payables		(2,215)
Other liabilities		(935)
Current and noncurrent lease liabilities		(1,184)
Aggregate purchase price, net of cash acquired		$ 83,324