Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Revenue	$ 1,807,004	$ 1,891,274	$ 5,530,464	$ 5,630,878
Lease and rental sales	89,129	89,466	264,696	264,681
Total revenue	1,896,133	1,980,740	5,795,160	5,895,559
Cost of products sold
Lease and rental sales	63,607	62,106	190,064	184,098
Total cost of products sold	1,517,092	1,586,335	4,633,855	4,688,537
Gross profit	379,041	394,405	1,161,305	1,207,022
Selling, general and administrative expense	239,741	257,132	754,774	770,631
Depreciation and amortization expense	19,134	15,872	51,376	44,731
Gain on disposition of assets	588	220	690	596
Operating income	120,754	121,621	355,845	392,256
Other income (expense)	149	133	370	2,384
Interest expense, net	17,664	14,194	55,101	37,415
Income before taxes	103,239	107,560	301,114	357,225
Income tax provision	23,819	26,926	71,422	87,277
Net income	79,420	80,634	229,692	269,948
Less: Net income attributable to noncontrolling interest	288	356	291	940
Net income attributable to Rush Enterprises, Inc.	$ 79,132	$ 80,278	$ 229,401	$ 269,008
Net income attributable to Rush Enterprises, Inc. per share of common stock:
Basic (in dollars per share)	$ 1	$ 0.99	$ 2.91	$ 3.3
Diluted (in dollars per share)	$ 0.97	$ 0.96	$ 2.81	$ 3.19
Basic (in shares)	79,216	81,229	78,878	81,629
Diluted (in shares)	81,884	83,987	81,607	84,251
Dividends declared per common share (in dollars per share)	$ 0.18	$ 0.17	$ 0.52	$ 0.45
New and Used Commercial Vehicle [Member]
Revenues
Revenue	$ 1,163,255	$ 1,235,767	$ 3,586,882	$ 3,648,286
Cost of products sold
Costs of products sold	1,053,512	1,113,294	3,239,431	3,287,998
Parts and Service [Member]
Revenues
Revenue	633,045	643,623	1,909,672	1,942,979
Cost of products sold
Costs of products sold	399,973	410,935	1,204,360	1,216,441
Finance and Insurance [Member]
Revenues
Revenue	5,780	6,317	17,111	19,077
Product and Service, Other [Member]
Revenues
Revenue	$ 4,924	$ 5,567	$ 16,799	$ 20,536