Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Revenue	$ 1,914,503	$ 1,710,703	$ 3,739,604	$ 3,202,570
Lease and rental sales	88,549	80,538	175,215	151,873
Total revenue	2,003,052	1,791,241	3,914,819	3,354,443
Lease and rental sales	61,514	55,335	121,992	103,896
Total cost of products sold	1,589,204	1,417,025	3,102,202	2,634,787
Gross profit	413,848	374,216	812,617	719,656
Selling, general and administrative expense	256,691	225,327	513,499	449,774
Depreciation and amortization expense	14,545	13,910	28,859	27,584
Gain on sale of assets	247	44	376	224
Operating income	142,859	135,023	270,635	242,522
Other (expense) income	(96)	8,333	2,251	22,397
Interest expense, net	12,238	3,168	23,221	4,387
Income before taxes	130,525	140,188	249,665	260,532
Income tax provision	32,001	29,515	60,351	57,406
Net income	98,524	110,673	189,314	203,126
Less: Net income attributable to noncontrolling interest	249	446	584	446
Net income attributable to Rush Enterprises, Inc.	$ 98,275	$ 110,227	$ 188,730	$ 202,680
Net income attributable to Rush Enterprises, Inc. per share of common stock:
Basic (in dollars per share)	$ 1.80	$ 1.98	$ 3.46	$ 3.63
Diluted (in dollars per share)	$ 1.75	$ 1.92	$ 3.35	$ 3.52
Weighted average shares outstanding:
Basic (in shares)	54,460	55,640	54,617	55,788
Diluted (in shares)	56,104	57,310	56,334	57,610
Dividends declared per common share (in dollars per share)	$ 0.21	$ 0.19	$ 0.42	$ 0.38
New and Used Commercial Vehicle [Member]
Revenues
Revenue	$ 1,250,794	$ 1,098,255	$ 2,412,519	$ 2,033,974
Costs of products sold	1,124,339	994,406	2,174,704	1,829,399
Parts and Service [Member]
Revenues
Revenue	651,130	598,298	1,299,356	1,141,561
Costs of products sold	403,351	367,284	805,506	701,492
Finance and Insurance [Member]
Revenues
Revenue	6,189	7,755	12,760	15,280
Product and Service, Other [Member]
Revenues
Revenue	$ 6,390	$ 6,395	$ 14,969	$ 11,755