Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Revenue	$ 1,778,598	$ 1,203,832	$ 4,981,168	$ 3,632,030
Lease and rental sales	85,688	62,689	237,561	182,312
Total revenue	1,864,286	1,266,521	5,218,729	3,814,342
Cost of products sold
Lease and rental sales	58,482	46,949	162,378	143,394
Total cost of products sold	1,482,888	984,226	4,117,675	3,016,451
Gross profit	381,398	282,295	1,101,054	797,891
Selling, general and administrative expense	242,609	179,890	692,383	539,579
Depreciation and amortization expense	13,961	13,137	41,545	40,284
Gain on sale of assets	2,209	901	2,433	1,157
Operating income	127,037	90,169	369,559	219,185
Other (expense) income	(215)	1,951	22,182	4,616
Interest expense, net	6,275	271	10,662	566
Income before taxes	120,547	91,849	381,079	223,235
Income tax provision	29,884	22,450	87,290	50,459
Net income	90,663	69,399	293,789	172,776
Less: Net income attributable to noncontrolling interest	287		733
Net income attributable to Rush Enterprises, Inc.	$ 90,376	$ 69,399	$ 293,056	$ 172,776
Net income attributable to Rush Enterprises, Inc. per share of common stock:
Basic (in dollars per share)	$ 1.64	$ 1.24	$ 5.27	$ 3.09
Diluted (in dollars per share)	$ 1.59	$ 1.20	$ 5.11	$ 2.99
Weighted average shares outstanding:
Basic (in shares)	55,232	56,007	55,601	55,882
Diluted (in shares)	56,875	57,806	57,363	57,834
Dividends declared per common share (in dollars per share)	$ 0.21	$ 0.19	$ 0.59	$ 0.55
New and Used Commercial Vehicle [Member]
Revenues
Revenue	$ 1,142,201	$ 729,344	$ 3,176,175	$ 2,274,332
Cost of products sold
Cost of products sold	1,045,658	656,411	2,875,057	2,053,271
Parts and Service [Member]
Revenues
Revenue	622,130	463,020	1,763,691	1,324,283
Cost of products sold
Cost of products sold	378,748	280,866	1,080,240	819,786
Finance and Insurance [Member]
Revenues
Revenue	7,639	6,851	22,919	20,723
Product and Service, Other [Member]
Revenues
Revenue	$ 6,628	$ 4,617	$ 18,383	$ 12,692