CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 279,400	$ 252,600
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization of property and equipment	84,200	69,100
Debt issuance cost amortization	3,800	2,300
Stock-based compensation expense	16,900	11,200
Deferred income taxes	(10,400)	(8,900)
Other	1,000	(1,200)
Changes in assets and liabilities that relate to operations:
Receivables	43,500	93,200
Inventories	101,100	419,800
Other assets	107,500	(2,700)
Notes payable - floor plan - trade	5,300	(556,600)
Trade accounts payable and other liabilities	13,100	(12,400)
Total adjustments	366,000	13,800
Net cash provided by (used in) operating activities	645,400	266,400
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of businesses, net of cash acquired	(94,200)	(66,100)
Purchases of land, property and equipment	(197,600)	(181,500)
Proceeds from sales of property and equipment	15,700	6,200
Proceeds from sales of dealerships	0	3,900
Net cash provided by (used in) investing activities	(276,100)	(237,500)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net (repayments) borrowings on notes payable - floor plan - non-trade	218,800	128,100
Borrowings on revolving credit facilities	0	4,900
Repayments on revolving credit facilities	0	(4,900)
Proceeds from issuance of long-term debt	0	16,500
Debt issuance costs	500	(4,800)
Principal payments and repurchase of long-term debt	(42,100)	(43,000)
Purchases of treasury stock	(245,200)	(67,000)
Finance Lease, Principal Payments	6,400	3,100
Issuance of shares under stock compensation plans	8,500	7,500
Dividends paid	(25,200)	(13,300)
Net cash provided by (used in) financing activities	(529,700)	20,900
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(160,400)	49,800
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	299,400	170,300
CASH AND CASH EQUIVALENTS, END OF PERIOD	139,000	220,100
Cash paid (received) during the period for:
Interest, including amount capitalized	68,700	46,000
Income taxes	$ 95,200	$ 85,800