Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 241,415	$ 114,887	$ 141,583
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	169,497	177,347	175,484
(Gain) loss on sale of property and equipment, net	(1,432)	(1,852)	102
Stock-based compensation expense related to employee stock options and employee stock purchases	22,246	19,356	19,005
Provision (benefit) for deferred income tax expense	14,034	(37,858)	22,989
Change in accounts receivable, net	32,312	11,223	19,831
Change in inventories	(33,572)	536,682	81,722
Change in prepaid expenses and other, net	(252)	5,822	(10,237)
Change in trade accounts payable	12,053	(23,336)	2,241
Payments on floor plan notes payable – trade, net		(114,958)	(26,579)
Change in customer deposits	2,993	31,514	6,512
Change in accrued expenses	(31,337)	48,974	(12,757)
Other, net	(5,611)	(4,819)	1,376
Net cash provided by operating activities	422,346	762,982	421,272
Cash flows from investing activities:
Acquisition of property and equipment	(167,177)	(136,200)	(293,493)
Proceeds from the sale of property and equipment	3,447	5,783	2,310
Business acquisitions	(269,332)		(10,168)
Purchase of equity method investment and call option			(22,499)
Other	157	2,960	3,394
Net cash used in investing activities	(432,905)	(127,457)	(320,456)
Cash flows from financing activities:
Draws (payments) on floor plan notes payable – non-trade, net	118,945	(369,592)	(104)
Proceeds from long-term debt	260,336	157,255	210,043
Principal payments on long-term debt	(455,064)	(255,279)	(183,538)
Principal payments on finance lease obligations	(13,774)	(11,192)	(8,331)
Draws on line of credit			135,000
Payments on line of credit			(135,000)
Proceeds from issuance of shares relating to employee stock options and employee stock purchases	10,870	21,037	8,244
Payments of cash dividends	(41,060)	(22,461)	(18,317)
Common stock repurchased	(33,596)	(24,865)	(58,188)
Debt issuance costs			(731)
Net cash used in financing activities	(153,343)	(505,097)	(50,922)
Net (decrease) increase in cash and cash equivalents	(163,902)	130,428	49,894
Cash and cash equivalents, beginning of year	312,048	181,620	131,726
Cash and cash equivalents, end of year	148,146	312,048	181,620
Supplemental disclosure of cash flow information:
Interest	22,224	38,806	57,373
Income taxes paid, net	101,987	36,364	42,440
Assets acquired under finance leases	$ 29,044	$ 49,523	44,904
Guaranty agreement			$ 5,025