Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues
Revenue	$ 1,837,583	$ 1,939,382	$ 3,598,160	$ 3,723,460
Lease and rental sales	93,124	87,646	183,377	175,567
Total revenue	1,930,707	2,027,028	3,781,537	3,899,027
Cost of products sold
Lease and rental sales	66,381	62,687	131,175	126,457
Total cost of products sold	1,551,036	1,634,639	3,044,106	3,116,763
Gross profit	379,671	392,389	737,431	782,264
Selling, general and administrative expense	251,981	251,368	500,784	515,033
Depreciation and amortization expense	17,611	16,492	34,867	32,242
Gain (loss) on sale of assets	127	(48)	295	102
Operating income	110,206	124,481	202,075	235,091
Other (expense) income	(372)	44	(812)	221
Interest expense, net	12,726	19,464	25,589	37,437
Income before taxes	97,108	105,061	175,674	197,875
Income tax provision	24,119	26,278	42,068	47,603
Net income	72,989	78,783	133,606	150,272
Less: Net income attributable to noncontrolling interest	551	122	846	3
Net income attributable to Rush Enterprises, Inc.	$ 72,438	$ 78,661	$ 132,760	$ 150,269
Net income attributable to Rush Enterprises, Inc. per share of common stock:
Basic (in dollars per share)	$ 0.93	$ 1.01	$ 1.68	$ 1.91
Diluted (in dollars per share)	$ 0.9	$ 97	$ 1.63	$ 1.84
Basic (in shares)	78,300	78,270	78,991	78,706
Diluted (in shares)	80,487	80,778	81,445	81,467
Dividends declared per common share (in dollars per share)	$ 0.18	$ 0.17	$ 0.36	$ 0.34
New and Used Commercial Vehicle [Member]
Revenues
Revenue	$ 1,191,504	$ 1,300,308	$ 2,322,274	$ 2,423,627
Cost of products sold
Costs of products sold	1,087,644	1,179,819	2,118,177	2,185,919
Parts and Service [Member]
Revenues
Revenue	636,258	627,431	1,255,326	1,276,627
Cost of products sold
Costs of products sold	397,011	392,133	794,754	804,387
Finance and Insurance [Member]
Revenues
Revenue	5,552	5,937	10,764	11,331
Product and Service, Other [Member]
Revenues
Revenue	$ 4,269	$ 5,706	$ 9,796	$ 11,875