Rush Enterprises (RUSHA) 10-K 24 Feb 21 2020 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 16, 2021	Jun. 30, 2020
Document Information [Line Items]
Entity Central Index Key	0001012019
Entity Registrant Name	RUSH ENTERPRISES INC \TX\
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	0-20797
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	74-1733016
Entity Address, Address Line One	555 IH 35 South
Entity Address, City or Town	New Braunfels
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	78130
City Area Code	830
Local Phone Number	302-5200
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 1,308,563,538
Common Class B [Member]
Document Information [Line Items]
Title of 12(b) Security	Class B Common Stock, $0.01 par value
Trading Symbol	RUSHB
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		12,397,082
Common Class A [Member]
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock, $0.01 par value
Trading Symbol	RUSHA
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		42,677,577

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 312,048	$ 181,620
Accounts receivable, net	172,481	183,704
Inventories, net	858,291	1,326,080
Prepaid expenses and other	14,906	20,728
Assets held for sale	0	419
Total current assets	1,357,726	1,712,551
Property and equipment, net	1,203,719	1,279,931
Operating lease right-of-use assets, net	60,577	57,197
Goodwill, net	292,142	292,142
Other assets, net	71,229	65,508
Total assets	2,985,393	3,407,329
Current liabilities:
Floor plan notes payable	511,786	996,336
Current maturities of long-term debt	141,672	189,265
Current maturities of finance lease obligations	26,373	22,892
Current maturities of operating lease obligations	10,196	10,114
Trade accounts payable	110,728	133,697
Customer deposits	74,209	42,695
Accrued expenses	151,830	112,390
Total current liabilities	1,026,794	1,507,389
Long-term debt, net of current maturities	387,982	438,413
Finance lease obligations, net of current maturities	90,740	69,478
Operating lease obligations, net of current maturities	51,155	47,555
Other long-term liabilities	34,246	20,704
Deferred income taxes, net	126,439	164,297
Shareholders’ equity:
Preferred stock, par value $.01 per share; 1,000,000 shares authorized; 0 shares outstanding in 2020 and 2019	0	0
Common stock, par value $.01 per share; 60,000,000 Class A shares and 20,000,000 Class B shares authorized; 42,503,925 Class A shares and 12,470,308 Class B shares outstanding in 2020; and 41,930,472 Class A shares and 12,360,729 Class B shares outstanding in 2019	551	465
Additional paid-in capital	437,646	397,267
Treasury stock, at cost: 10,335 Class A shares and 73,437 Class B shares in 2020 and 7,583,674 Class A shares and 7,959,511 Class B shares in 2019	(2,879)	(304,129)
Retained earnings	831,850	1,065,553
Accumulated other comprehensive income	869	337
Total shareholders’ equity	1,268,037	1,159,493
Total liabilities and shareholders’ equity	$ 2,985,393	$ 3,407,329

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Class A [Member]
Common stock, authorized (in shares)	60,000,000	60,000,000
Common stock, outstanding (in shares)	42,503,925	41,930,472
Treasury stock (in shares)	10,335	7,583,674
Common Class B [Member]
Common stock, authorized (in shares)	20,000,000	20,000,000
Common stock, outstanding (in shares)	12,470,308	12,360,729
Treasury stock (in shares)	73,437	7,959,511

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues
Revenue	$ 4,499,717	$ 5,562,298	$ 5,267,952
Lease and rental	236,223	247,549	238,238
Total revenue	4,735,940	5,809,847	5,506,190
Cost of products sold
Lease and rental	202,412	206,200	197,271
Total cost of products sold	3,860,473	4,784,219	4,527,921
Gross profit	875,467	1,025,628	978,269
Selling, general and administrative	665,258	753,749	705,226
Depreciation and amortization	57,456	55,372	70,489
Gain (loss) on sale of assets	1,852	(102)	297
Operating income	154,605	216,405	202,851
Other income	6,132	1,925	0
Interest income (expense):
Interest income	713	1,680	1,376
Interest expense	(9,727)	(30,487)	(21,058)
Total interest expense, net	9,014	28,807	19,682
Income before taxes	151,723	189,523	183,169
Income tax provision	36,836	47,940	44,107
Net income	$ 114,887	$ 141,583	$ 139,062
Earnings per common share
Basic (in dollars per share)	$ 2.09	$ 2.57	$ 2.36
Diluted (in dollars per share)	2.04	2.51	2.30
Dividends declared per common share (in dollars per share)	$ 0.41	$ 0.34	$ 0.16
New and Used Commercial Vehicle [Member]
Revenues
Revenue	$ 2,863,309	$ 3,757,584	$ 3,558,637
Cost of products sold
Cost of products sold	2,641,487	3,480,682	3,280,966
Parts and Service [Member]
Revenues
Revenue	1,600,445	1,762,510	1,670,052
Cost of products sold
Cost of products sold	1,016,574	1,097,337	1,049,684
Finance and Insurance [Member]
Revenues
Revenue	21,949	24,443	20,535
Product and Service, Other [Member]
Revenues
Revenue	$ 14,014	$ 17,761	$ 18,728

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 114,887	$ 141,583	$ 139,062
Other comprehensive income net of tax and net of reclassification adjustments:
Change in currency translation	532	337	0
Comprehensive income	$ 115,419	$ 141,920	$ 139,062

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Class A [Member]Common Stock [Member]	Common Class A [Member]Additional Paid-in Capital [Member]	Common Class A [Member]Treasury Stock [Member]	Common Class A [Member]Retained Earnings [Member]	Common Class A [Member]AOCI Attributable to Parent [Member]	Common Class A [Member]	Common Class B [Member]Common Stock [Member]	Common Class B [Member]Additional Paid-in Capital [Member]	Common Class B [Member]Treasury Stock [Member]	Common Class B [Member]Retained Earnings [Member]	Common Class B [Member]AOCI Attributable to Parent [Member]	Common Class B [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	47,017,000						12,703,000
Balance at Dec. 31, 2017													$ 454	$ 348,044	$ (120,682)	$ 812,557	$ 0	$ 1,040,373
Stock options exercised and stock awards (in shares)	207,000						0
Stock options exercised and stock awards													1	2,742	0	0	0	2,743
Stock-based compensation related to stock options, restricted shares and employee stock purchase plan													0	18,059	0	0	0	18,059
Vesting of restricted share awards (in shares)	0						340,000
Vesting of restricted share awards													2	(1,749)	0	0	0	(1,747)
Issuance of common stock under employee stock purchase plan (in shares)	126,000						0
Issuance of common stock under employee stock purchase plan													1	2,929	0	0	0	2,930
Common stock repurchases (in shares)	(4,285,000)						(608,000)
Common stock repurchases													0	0	(125,160)	0	0	(125,160)
Cash dividends declared	$ 0	$ 0	$ 0	$ (7,324)	$ 0	$ (7,324)	$ 0	$ 0	$ 0	$ (2,008)	$ 0	$ (2,008)
Net income													0	0	0	139,062	0	139,062
Balance (in shares) at Dec. 31, 2018	43,065,000						12,435,000
Balance at Dec. 31, 2018													458	370,025	(245,842)	942,287	0	1,066,928
Stock options exercised and stock awards (in shares)	586,000						0
Stock options exercised and stock awards													4	7,585	0	0	0	7,589
Stock-based compensation related to stock options, restricted shares and employee stock purchase plan													0	19,005	0	0	0	19,005
Vesting of restricted share awards													2	(2,834)	0	0	0	(2,832)
Issuance of common stock under employee stock purchase plan (in shares)	175,000						0
Issuance of common stock under employee stock purchase plan													1	3,486	0	0	0	3,487
Common stock repurchases (in shares)	(1,896,000)						(414,000)
Common stock repurchases													0	0	(58,287)	0	0	(58,287)
Cash dividends declared	$ 0	0	0	(14,037)	0	(14,037)	$ 0	0	0	(4,280)	0	(4,280)
Net income													0	0	0	141,583	0	141,583
Other comprehensive income (loss)													0	0	0	0	337	337
Balance (in shares) at Dec. 31, 2019	41,930,000						12,360,000
Balance at Dec. 31, 2019													465	397,267	(304,129)	1,065,553	337	$ 1,159,493
Stock options exercised and stock awards (in shares)	1,247,000						0											1,221,594
Stock options exercised and stock awards													10	19,582	0	0	0	$ 19,592
Stock-based compensation related to stock options, restricted shares and employee stock purchase plan													0	19,356	0	0	0	19,356
Vesting of restricted share awards (in shares)	0						339,000
Vesting of restricted share awards													2	(2,459)	0	0	0	(2,457)
Issuance of common stock under employee stock purchase plan (in shares)	177,000						0
Issuance of common stock under employee stock purchase plan													2	3,900	0	0	0	3,902
Common stock repurchases (in shares)	(843,000)						(225,000)
Common stock repurchases													0	0	(24,807)	0	0	(24,807)
Cash dividends declared	$ 0	$ 0	$ 0	$ (17,062)	$ 0	$ (17,062)	$ 0	$ 0	$ 0	$ (5,399)	$ 0	$ (5,399)
Net income													0	0	0	114,887	0	114,887
Other comprehensive income (loss)													0	0	0	0	532	532
Cancellation of treasury stock (in shares)	(7,000)						(4,000)
Cancellation of treasury stock													72	0	326,057	(326,129)	0
Balance (in shares) at Dec. 31, 2020	42,504,000						12,470,000
Balance at Dec. 31, 2020													$ 551	$ 437,646	$ (2,879)	$ 831,850	$ 869	$ 1,268,037

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 114,887	$ 141,583	$ 139,062
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	177,347	175,484	185,122
(Gain) loss on sale of property and equipment, net	(1,852)	102	(297)
Stock-based compensation expense related to employee stock options and employee stock purchases	19,356	19,005	18,059
(Benefit) provision for deferred income tax expense	(37,858)	22,989	5,997
Change in accounts receivable, net	11,223	19,831	(7,746)
Change in inventories	536,682	81,722	(255,040)
Change in prepaid expenses and other, net	5,822	(10,237)	1,907
Change in trade accounts payable	(23,336)	2,241	18,490
(Payments) draws on floor plan notes payable – trade, net	(114,958)	(26,579)	76,646
Change in customer deposits	31,514	6,512	8,833
Change in accrued expenses	48,974	(12,757)	24,331
Other, net	(4,819)	1,376	0
Net cash provided by operating activities	762,982	421,272	215,364
Cash flows from investing activities:
Acquisition of property and equipment	(136,200)	(293,493)	(238,260)
Proceeds from the sale of property and equipment	5,783	2,310	6,325
Business acquisitions	0	(10,168)	0
Purchase of equity method investment and call option	0	(22,499)	0
Proceeds from the sale of available for sale securities	0	0	6,375
Other	2,960	3,394	(1,683)
Net cash used in investing activities	(127,457)	(320,456)	(227,243)
Cash flows from financing activities:
(Payments) draws on floor plan notes payable – non-trade, net	(369,592)	(104)	167,812
Proceeds from long-term debt	157,255	210,043	156,751
Principal payments on long-term debt	(255,279)	(183,538)	(167,106)
Principal payments on finance lease obligations	(11,192)	(8,331)	(12,429)
Draws on line of credit	0	135,000	0
Payments on line of credit	0	(135,000)	0
Proceeds from issuance of shares relating to employee stock options and employee stock purchases	21,037	8,244	3,926
Payments of cash dividends	(22,461)	(18,317)	(9,332)
Common stock repurchased	(24,865)	(58,188)	(120,558)
Debt issuance costs	0	(731)	0
Net cash (used in) provided by financing activities	(505,097)	(50,922)	19,064
Net increase (decrease) in cash and cash equivalents	130,428	49,894	7,185
Cash and cash equivalents, beginning of year	181,620	131,726	124,541
Cash and cash equivalents, end of year	312,048	181,620	131,726
Supplemental disclosure of cash flow information:
Interest	38,806	57,373	42,752
Income taxes paid, net	36,364	42,440	28,674
Assets acquired under finance leases	$ 49,523	44,904	$ 4,914
Guaranty agreement		$ 5,025

Note 1 - Organization and Opera

Note 1 - Organization and Operations	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. ORGANIZATION AND OPERATIONS Rush Enterprises, Inc. (the “Company”) was incorporated in 1965 one Stock Split On September 15, 2020, October 12, 2020, one two September 28, 2020. 10 first COVID- 19 In March 2020, 19 19 19 December 31, 2020. 19

Note 2 - Significant Accounting

Note 2 - Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Significant Accounting Policies [Text Block]	2. SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation The consolidated financial statements presented herein include the accounts of Rush Enterprises, Inc. together with its consolidated subsidiaries. All significant inter-company balances and transactions have been eliminated in consolidation. Estimates in Financial Statements The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may Cash and Cash Equivalents Cash and cash equivalents generally consist of cash and other money market instruments. The Company considers all highly liquid investments with an original maturity of ninety Allowance for Credit Losses and Reposses s ion Losses The Company maintains an allowance for credit losses based on the probability of default, its historical rate of losses, aging and current economic conditions. Accounts receivable consists primarily of commercial vehicle sales receivables, manufacturers’ receivables, leasing and parts and service receivables and other trade receivables. The Company writes off account balances when it has exhausted reasonable collection efforts and determined that the likelihood of collection is remote. These write-offs are charged against the allowance for credit losses. The Company provides an allowance for repossession losses after considering historical loss experience and other factors that might affect the ability of customers to meet their obligations on finance contracts sold by the Company when the Company has a potential liability. Inventories Inventories are stated at the lower of cost or net realizable value. Cost is determined by specific identification of new and used commercial vehicle inventory and by the first first Property and Equipment Property and equipment are stated at cost and depreciated over their estimated useful lives. Leasehold improvements are amortized over the useful life of the improvement, or the term of the lease, whichever is shorter. Provision for depreciation of property and equipment is calculated primarily on a straight-line basis. The Company capitalizes interest on borrowings during the active construction period of major capital projects. Capitalized interest, when incurred, is added to the cost of underlying assets and is amortized over the estimated useful life of such assets. The Company recorded capitalized interest of approximately $163,500 related to major capital projects during 2020. 2020 2019 Estimated Life (Years) Land $ 136,024 $ 137,416 – Buildings and improvements 495,808 474,106 10 – 39 Leasehold improvements 38,767 34,350 2 – 39 Machinery and shop equipment 87,090 82,594 5 – 20 Furniture, fixtures and computers 81,834 73,846 3 – 15 Transportation equipment 96,319 99,127 3 – 15 Lease and rental vehicles 905,465 968,121 1 – 8 Construction in progress 2,989 16,874 Accumulated depreciation and amortization (640,577 ) (606,503 ) Total $ 1,203,719 $ 1,279,931 The Company recorded depreciation expense of $157.8 million and amortization expense of $19.5 million for the year ended December 31, 2020, December 31, 2019, December 31, 2018. As of December 31, 2020, December 31, 2020, December 31, 2019 December 31, 2018. Goodwill Goodwill is the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations accounted for under the purchase method. The Company tests goodwill for impairment annually during the fourth The impairment test for goodwill involves comparing the fair value of a reporting unit to its carrying amount, including goodwill. If the carrying amount of the reporting unit exceeds its fair value, a second second not No impairment write down was required in the fourth 2020. The carrying amount of goodwill for the Company for the years ended December 31, 2020 2019 $292.1 Other Assets ERP Platform The total capitalized costs of the Company’s SAP enterprise resource planning software platform (“the ERP Platform”) of $7.0 million are recorded on the Consolidated Balance Sheet in Other Assets. Amortization expense relating to the ERP Platform, which is recognized in depreciation and amortization expense in the Consolidated Statements of Income and Comprehensive Income, was $1.9 million for the year ended December 31, 2020 December 31, 2019. five In the first 2018, 350 40, first 2018, May 2018. February 2018 May 2018. 2018 Franchise Rights The Company’s only significant identifiable intangible assets, other than goodwill, are rights under franchise agreements with manufacturers. The fair value of the franchise right is determined at the acquisition date by discounting the projected cash flows specific to each acquisition. The carrying value of the Company’s manufacturer franchise rights was $7.0 million at December 31, 2020 2019, no not Due to the fact that manufacturer franchise rights are specific to a geographic region, the Company has determined that evaluating and including all locations acquired in the geographic region is the appropriate level for purposes of testing franchise rights for impairment. Management reviews indefinite-lived manufacturer franchise rights for impairment annually during the fourth may The significant estimates and assumptions used by management in assessing the recoverability of manufacturer franchise rights include estimated future cash flows, present value discount rate and other factors. Any changes in these estimates or assumptions could result in an impairment charge. The estimates of future cash flows, based on reasonable and supportable assumptions and projections, require management’s subjective judgment. Depending on the assumptions and estimates used, the estimated future cash flows projected in the evaluations of manufacturer franchise rights can vary within a range of outcomes. No impairment write-down was required in the period presented. The Company cannot predict the occurrence of certain events that might adversely affect the reported value of manufacturer franchise rights in the future. Equity Method Investment and Call Option On February 25, 2019, February 25, 2024. December 31, 2020, On April 25, 2019, CAD250 2019, not December 31, 2020 December 31, 2019, December 31, 2020, Income Taxes Management’s judgment is required to determine the provisions for income taxes and to determine whether deferred tax assets will be realized in full or in part. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. When it is more likely than not not not In determining its provision for income taxes, the Company uses an annual effective income tax rate based on annual income, permanent differences between book and tax income, and statutory income tax rates. The effective income tax rate also reflects its assessment of the ultimate outcome of tax audits. The Company adjusts its annual effective income tax rate as additional information on outcomes or events becomes available. Discrete events such as audit settlements or changes in tax laws are recognized in the period in which they occur. The Company’s income tax returns are periodically audited by tax authorities. These audits include questions regarding the Company’s tax filing positions, including the timing and amount of deductions. In evaluating the exposures associated with its various tax filing positions, the Company adjusts its liability for unrecognized tax benefits and income tax provision in the period in which an uncertain tax position is effectively settled, the statute of limitations expires for the relevant taxing authority to examine the tax position or when more information becomes available. The Company’s liability for unrecognized tax benefits contains uncertainties because management is required to make assumptions and to apply judgment to estimate the exposures associated with its various filing positions. The Company’s effective income tax rate is also affected by changes in tax law, the level of earnings and the results of tax audits. Although the Company believes that the judgments and estimates are reasonable, actual results could differ, and the Company may Revenue Recognition Policies Effective January 1, 2018, 2014 09, Revenue from Contracts with Customers ( “ Topic 606 ” ) 606, 606, five five 606, 18 Cost of Sales For the Company’s new and used commercial vehicle operations, cost of sales consists primarily of the Company’s actual purchase price, plus make-ready expenses, less any applicable manufacturers’ incentives. For the Company’s parts operations, cost of sales consists primarily of the Company’s actual purchase price, less any applicable manufacturers’ incentives. For the Company’s service and collision center operations, technician labor cost is the primary component of cost of sales. For the Company’s rental and leasing operations, cost of sales consists primarily of depreciation and amortization, rent, maintenance costs, license costs and interest expense on the lease and rental fleet owned and leased by the Company. There are no Leases The Company leases commercial vehicles and real estate under finance and operating leases. The Company determines whether an arrangement is a lease at its inception. For leases with terms greater than twelve When available, the Company uses the rate implicit in the lease to discount lease payments to present value; however, most of its leases do not The Company leases commercial vehicles that the Company owns to customers. Lease and rental revenue is recognized over the period of the related lease or rental agreement. Variable rental revenue is recognized when it is earned. Taxes Assessed by a Governmental Authority The Company accounts for sales taxes assessed by a governmental authority that are directly imposed on a revenue-producing transaction on a net (excluded from revenues) basis. Selling, General and Administrative Expenses Selling, general and administrative expenses consist primarily of incentive based compensation for sales, finance and general management personnel, salaries for administrative personnel and expenses for rent, marketing, insurance, utilities, research and development and other general operating purposes. Stock Based Compensation The Company applies the provisions of ASC topic 718 10, The Company uses the Black-Scholes option-pricing model to estimate the fair value of share-based payment awards on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods. Compensation expense for all share-based payment awards is recognized using the straight-line single-option method. Stock-based compensation expense is recognized based on awards expected to vest. Accordingly, stock based compensation expense has been reduced for estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company determines the fair value of share-based payment awards on the date of grant using an option-pricing model that is affected by the Company’s stock price, as well as assumptions regarding a number of highly complex and subjective variables. These variables include the Company’s expected stock price volatility over the term of the awards and actual and projected stock option exercise behaviors. Option-pricing models were developed for use in estimating the value of traded options that have no may not may not The following table reflects the weighted-average fair value of stock options granted during each period using the Black-Scholes option valuation model with the following weighted-average assumptions used: 2020 2019 2018 Expected stock volatility 33.11 % 31.29 % 31.68 % Weighted-average stock volatility 33.11 % 31.29 % 31.68 % Expected dividend yield 1.20 % 1.13 % 0.00 % Risk-free interest rate 0.80 % 2.45 % 2.69 % Expected life (years) 6.0 6.0 6.0 Weighted-average fair value of stock options granted $ 6.36 $ 8.37 $ 10.31 The Company computes its historical stock price volatility in accordance with ASC Topic 718 10. Advertising Costs Advertising costs are expensed as incurred. Advertising and marketing expense was $7.9 million for 2020, 2019 2018. Accounting for Internal Use Software The Company’s accounting policy with respect to accounting for computer software developed or obtained for internal use is consistent with ASC topic 350 40, December 31, 2020, December 31, 2019, Insurance The Company is partially self-insured for a portion of the claims related to its property and casualty insurance programs. Accordingly, the Company is required to estimate expected losses to be incurred. The Company engages a third third not Fair Value Measurements The Company has various financial instruments that it must measure at fair value on a recurring basis. See Note 9 Applicable accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). The Company measures its assets and liabilities using inputs from the following three Level 1 Level 2 not Level 3 Acquisitions The Company uses the acquisition method of accounting for the recognition of assets acquired and liabilities assumed through acquisitions at their estimated fair values as of the date of acquisition. Any excess consideration transferred over the estimated fair values of the identifiable net assets acquired is recorded as goodwill. While the Company uses its best estimates and assumptions to measure the fair value of the identifiable assets acquired and liabilities assumed at the acquisition date, the estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which is not one Recent Accounting Pronouncements In June 2016, No. 2016 13, "Financial Instruments - Credit Losses (Topic 326 January 1, 2020. not In March 2020, 2020 04, Reference Rate Reform (Topic 848 , ” December 31, 2022.

Note 3 - Supplier Concentration

Note 3 - Supplier Concentration	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	3. SUPPLIER CONCENTRATION Major Suppliers and Dealership Agreements The Company has entered into dealership agreements with various manufacturers of commercial vehicles and buses (“Manufacturers”). These agreements are nonexclusive agreements that allow the Company to stock, sell at retail and service commercial vehicles and sell parts from the Manufacturers in the Company’s defined market. The agreements allow the Company to use the Manufacturers’ names, trade symbols and intellectual property and expire as follows: Manufacturer Expiration Dates Peterbilt November 2021 September 2022 International March 2021 May 2025 Isuzu Indefinite Hino Indefinite Ford Indefinite Blue Bird August 2024 IC Bus March 2021 May 2025 These agreements, as well as agreements with various other Manufacturers, impose a number of restrictions and obligations on the Company, including restrictions on a change in control of the Company and the maintenance of certain required levels of working capital. Violation of these restrictions could result in the loss of the Company’s right to purchase the Manufacturers’ products and use the Manufacturers’ trademarks. The Company purchases its new Peterbilt vehicles from Peterbilt and most of the parts sold at its Peterbilt dealerships from PACCAR, Inc, the parent company of Peterbilt, at prevailing prices charged to all franchised dealers. Sales of new Peterbilt trucks accounted for approximately 59.0% of the Company’s new vehicle sales revenue for the year ended December 31, 2020, December 31, 2019, December 31, 2018. Primary Lenders The Company purchases its new and used commercial vehicle inventories with the assistance of floor plan financing programs as described in Note 7 The Company also acquires lease and rental vehicles with the assistance of financing agreements with PACCAR Leasing Company and Bank of America. The financing agreements are secured by a lien on the acquired vehicle. The terms of the financing agreements are similar to the corresponding lease agreements with the Company’s customers. Concentrations of Credit Risks Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. The Company places its cash and cash equivalents with what it considers to be quality financial institutions based on periodic assessments of such institutions. The Company’s cash and cash equivalents may The Company controls credit risk through credit approvals and by selling a majority of its trade receivables, other than vehicle accounts receivable, without recourse. Concentrations of credit risk with respect to trade receivables are reduced because a large number of geographically diverse customers make up the Company’s customer base; however, substantially all of the Company’s business is concentrated in the United States commercial vehicle markets and related aftermarkets. The Company generally sells finance contracts it enters into with customers to finance the purchase of commercial vehicles to third

Note 4 - Accounts Receivable

Note 4 - Accounts Receivable	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	4. ACCOUNTS RECEIVABLE The Company’s accounts receivable, net, consisted of the following (in thousands): December 31, 2020 2019 Trade accounts receivable from sale of vehicles $ 82,338 $ 82,991 Trade receivables other than vehicles 58,689 68,376 Warranty claims 9,032 16,819 Other accounts receivable 24,027 16,942 Less allowance for credit losses (1,605 ) (1,424 ) Total $ 172,481 $ 183,704

Note 5 - Inventories

Note 5 - Inventories	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Inventory Disclosure [Text Block]	5. INVENTORIES The Company’s inventories, net, consisted of the following (in thousands): December 31, 2020 2019 New commercial vehicles $ 563,097 $ 967,785 Used commercial vehicles 56,214 84,610 Parts and accessories 238,195 273,185 Other 16,175 17,763 Less allowance (15,390 ) (17,263 ) Total $ 858,291 $ 1,326,080

Note 6 - Valuation Accounts

Note 6 - Valuation Accounts	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	6. VALUATION ACCOUNTS: Valuation and allowance accounts include the following (in thousands): Balance Beginning of Year Net Charged to Costs and Expenses Net Write- Offs Balance End of Year 2020 Reserve for parts inventory $ 7,661 $ 4,501 $ (2,847 ) $ 9,315 Reserve for commercial vehicle inventory 9,602 9,598 (13,125 ) 6,075 2019 Reserve for accounts receivable $ 987 $ 2,065 $ (2,038 ) $ 1,014 Reserve for warranty receivables 429 1,661 (1,680 ) 410 Reserve for parts inventory 7,050 4,460 (3,849 ) 7,661 Reserve for commercial vehicle inventory 4,587 12,489 (7,474 ) 9,602 2018 Reserve for accounts receivable $ 616 $ 2,183 $ (1,812 ) $ 987 Reserve for warranty receivables 210 2,031 (1,812 ) 429 Reserve for parts inventory 6,230 2,744 (1,924 ) 7,050 Reserve for commercial vehicle inventory 5,953 3,550 (4,916 ) 4,587 Accounts Receivable and Allowance for Credit Losses The Company adopted Topic 326 January 1, 2020. not not 326, Accounts receivable consists primarily of commercial vehicle sales receivables, manufacturers’ receivables and leasing, parts and service sales receivables and other trade receivables. The Company maintains an allowance for credit losses based on the probability of default, its historical rate of losses, aging and current economic conditions. The Company’s assessment of future losses in 2020 19 The following table summarizes the changes in the allowance for credit losses (in thousands): Balance December 31, 2019 Provision for the Year Ended December 31, 2020 Write offs Against Allowance, net of Recoveries Balance December 31, 2020 Commercial vehicle receivables $ 11 $ 161 $ - $ 172 Manufacturers’ receivables 410 1,169 (1,443 ) 136 Leasing, parts and service receivables 989 1,852 (1,563 ) 1,278 Other receivables 14 21 (16 ) 19 Total $ 1,424 $ 3,203 $ (3,022 ) $ 1,605 Inventory The Company provides a reserve for obsolete and slow moving parts. The reserve is reviewed and, if necessary, adjustments are made on a quarterly basis. The Company relies on historical information to support its reserve. Once the inventory is written down, the Company does not The valuation for new and used commercial vehicle inventory is based on specific identification. A detail of new and used commercial vehicle inventory is reviewed and, if necessary, adjustments to the value of specific vehicles are made on a quarterly basis.

Note 7 - Floor Plan Notes Payab

Note 7 - Floor Plan Notes Payable and Lines of Credit	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Debt Disclosure [Text Block]	7. FLOOR PLAN NOTES PAYABLE AND LINES OF CREDIT Floor Plan Notes Payable Floor plan notes are financing agreements to facilitate the Company’s purchase of new and used commercial vehicle inventory. These notes are collateralized by the inventory purchased and accounts receivable arising from the sale thereof. The Company’s Floor Plan Credit Agreement provides for a loan commitment of up to $1.0 billion and has the interest rate benchmarked to LIBOR, as defined in the agreement. The interest rate under the Company’s Floor Plan Credit Agreement is the one December 31, 2020. The Company finances substantially all of the purchase price of its new commercial vehicle inventory and the loan value of its used commercial vehicle inventory under its Floor Plan Credit Agreement, under which BMO Harris pays the manufacturer directly with respect to new commercial vehicles. Amounts borrowed under the Company’s Floor Plan Credit Agreement are due when the related commercial vehicle inventory (collateral) is sold and the sales proceeds are collected by the Company. The Company’s Floor Plan Credit Agreement expires June 30, 2022, 360 may December 31, 2020, In June 2012, December 31, 2020, not The Company’s weighted average interest rate for floor plan notes payable was 1.2% for the year ended December 31, 2020, December 31, 2019, Assets pledged as collateral were as follows (in thousands): December 31, 2020 2019 Inventories, new and used vehicles at cost based on specific identification, net of allowance $ 613,236 $ 1,042,794 Vehicle sale related accounts receivable 82,338 82,991 Total $ 695,574 $ 1,125,785 Floor plan notes payable related to vehicles $ 511,786 $ 996,336 Lines of Credit The Company has a secured line of credit that provides for a maximum borrowing of $17.5 million. There were no advances outstanding under this secured line of credit at December 31, 2020; December 31, 2020. The Company’s Working Capital Facility with BMO Harris includes up to $100.0 million of revolving credit loans available to it for working capital, capital expenditures and other general corporate purposes. The amount of the borrowings under the Working Capital Facility are subject to borrowing base limitations based on the value of the Company’s eligible parts inventory and company vehicles. The Working Capital Facility includes a $20 million letter of credit sublimit. Borrowings under the Working Capital Facility bear interest at rates based on LIBOR or the Base Rate (as such terms are defined in the Working Capital Facility), plus an applicable margin determined based on outstanding borrowing under the Working Capital Facility. In addition, the Company is required to pay a commitment fee on the amount unused under the Working Capital Facility. The Working Capital Facility expires on the earlier of (i) June 30, 2022 December 31, 2020.

Note 8 - Long-term Debt

Note 8 - Long-term Debt	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Long-term Debt [Text Block]	8. LONG-TERM DEBT Long-term debt was comprised of the following (in thousands): December 31, 2020 2019 Variable interest rate term notes $ 40,975 $ 58,416 Fixed interest rate term notes 488,679 569,262 Total debt 529,654 627,678 Less: current maturities (141,672 ) (189,265 ) Total long-term debt, net of current maturities $ 387,982 $ 438,413 As of December 31, 2020, 2021 141,672 2022 125,511 2023 107,145 2024 81,916 2025 46,778 Thereafter 26,632 Total $ 529,654 The interest rates on the Company’s variable interest rate notes are based on various LIBOR and Prime benchmark rates. The interest rates on the notes ranged from approximately 1.6% to 3.5% on December 31, 2020. October 2022 October 2025. The Company’s fixed interest rate notes had interest rates that ranged from approximately 2.0% to 6.19% on December 31, 2020. January 2021 May 2029. The proceeds from the issuance of the notes were used primarily to acquire land, buildings and related property improvements, in addition to vehicles for the Company’s lease and rental fleet. The notes are secured by the assets acquired with the proceeds of such notes. The Company’s long-term real estate debt agreements, floor plan financing arrangements and the Working Capital Facility require the Company to satisfy various financial ratios such as the debt to worth ratio, leverage ratio, the fixed charge coverage ratio and certain requirements for tangible net worth and GAAP net worth. As of December 31, 2020, not

Note 9 - Financial Instruments

Note 9 - Financial Instruments and Fair Value	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Fair Value Disclosures [Text Block]	9. FINANCIAL INSTRUMENTS AND FAIR VALUE The Company measures certain financial assets and liabilities at fair value on a recurring basis. Financial instruments consist primarily of cash, accounts receivable, accounts payable and floor plan notes payable. The carrying values of the Company’s financial instruments approximate fair value due either to their short-term nature or existence of variable interest rates, which approximate market rates. Certain methods and assumptions were used by the Company in estimating the fair value of financial instruments as of December 31, 2020, 2019. The fair value of the Company’s long-term debt is based on secondary market indicators. Because the Company’s debt is not 2

Note 10 - Leases

Note 10 - Leases	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Leases of Lessee and Lessor Disclosure [Text Block]	10. LEAS ES In February 2016, No. 2016 02, Leases ( “ Topic 842 ” ), twelve A lease is classified as a finance lease if any of the following conditions exist on the date of lease commencement: ● The lease transfers ownership of the underlying asset to the lessee by the end of the lease term. ● The lease provides the lessee an option to purchase the underlying asset, and that option is reasonably certain to be exercised. ● The lease term is for the major part of the remaining economic life of the underlying asset. ● The present value of the lease payments equals or exceeds substantially all of the fair value of the underlying asset. ● The underlying asset is of such a specialized nature that only the lessee can use it without major modifications. ● The lessor expects to have no The Company adopted Topic 842 January 1, 2019. January 1, 2019. December 31, 2020 December 31, 2019 December 31, 2018 not 842, twelve The Company leases commercial vehicles and real estate under finance and operating leases. The Company determines whether an arrangement is a lease at its inception. For leases with terms greater than twelve not When available, the Company uses the rate implicit in the lease to discount lease payments to present value; however, most of its leases do not Le ase of Vehicles as Lessee The Company leases commercial vehicles as the lessee under finance leases and operating leases. The lease terms vary from one ten 2019 842. December 31, 2020 December 31, 2019. The Company usually guarantees the residual value of vehicles under operating lease and finance lease arrangements. As of December 31, 2020, Lease of Facilities as Lessee The Company’s facility leases are classified as operating and finance leases and primarily reflect its use of dealership facilities and office space. The lease terms vary from one one Lease cost s and Supplemental Information Components of lease cost are as follows (in thousands): Twelve Months Ended Component Classification December 31, 2020 December 31, 2019 Operating lease cost SG&A expense $ 9,986 $ 9,479 Operating lease cost Lease and rental cost of products sold 4,654 4,154 Finance lease cost – amortization of right-of-use assets Lease and rental cost of products sold 16,791 14,312 Finance lease cost – interest on lease liabilities Lease and rental cost of products sold 4,678 3,372 Short-term lease cost SG&A expense 66 594 Supplemental cash flow information and non-cash activity related to operating and finance leases are as follows (in thousands): Twelve Months Ended December 31, 2020 December 31, 2019 Operating cash flow information: Cash paid for amounts included in the measurement of lease liabilities $ 19,318 $ 17,005 Financing cash flow information: Cash paid for amounts included in the measurement of lease liabilities $ 11,192 $ 8,331 Non-cash activity: Operating lease right-of-use assets obtained in exchange for lease obligations $ 16,545 $ 57,197 Weighted-average remaining lease term and discount rate for operating and finance leases as of December 31, 2020 Weighted-average remaining lease term (in months) 68 Weighted-average discount rate 5.3 % Maturities of lease liabilities by fiscal year for finance leases and operating leases as of December 31, 2020 Finance Leases Operating Leases 2021 $ 31,579 $ 13,055 2022 25,714 11,333 2023 21,553 9,890 2024 22,797 9,835 2025 15,837 6,242 2026 and beyond 16,931 28,572 Total lease payments $ 134,411 $ 78,927 Less: Imputed interest (17,298 ) (17,576 ) Present value of lease liabilities $ 117,113 $ 61,351 Lease of Vehicles as Lessor The Company leases commercial vehicles that the Company owns to customers primarily over periods of one ten 842 not The Company’s policy is to depreciate its lease and rental fleet using a straight-line method over each customer’s contractual lease term. The lease unit is depreciated to a residual value that approximates fair value at the expiration of the lease term. This policy results in the Company realizing reasonable gross margins while the unit is in service and a corresponding gain or loss on sale when the unit is sold at the end of the lease term. Sales-type leases are recognized by the Company as lease receivables. The lessee obtains control of the underlying asset and the Company recognizes sales revenue upon lease commencement. The receivable for sales-type leases as of December 31, 2020 Minimum rental payments to be received for non-cancelable leases and subleases in effect as of December 31, 2020, 2021 $ 130,063 2022 105,791 2023 82,312 2024 57,813 2025 32,112 Thereafter 17,927 Total $ 426,018 Rental income during the year ended December 31, 2020, 2019, 2020 2019 Minimum rental payments $ 205,640 $ 215,288 Nonlease payments 30,583 32,261 Total $ 236,223 $ 247,549

Note 11 - Share Based Compensat

Note 11 - Share Based Compensation and Employee Benefit Plans	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	11. SHARE BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS Employee Stock Purchase Plan The Company’s 2004 six first may first May 12, 2020, December 31, 2020 December 31, 2019. December 31, 2020. Non-Employee Director Stock Option Plan The Rush Enterprises, Inc. 2006 2020, three three 2019, three two 2019, one October 2019 December 31, 2020 December 31, 2019. Employee Incentive Plans In May 2007, 2007 “2007 2007 may 2007 May 20, 2014, May 16, 2017 May 12, 2020 2007 The aggregate number of shares of common stock subject to stock options or SARs that may one 2007 2007 ten three third 2007 December 31, 2020, 2007 December 31, 2020, 2007 December 31, 2019, 2007 Valuation and Expense Information Stock-based compensation expense related to stock options, restricted stock awards, restricted stock units and employee stock purchases was $19.4 million for the year ended December 31, 2020, December 31, 2019, December 31, 2018. December 31, 2020, December 31, 2019, December 31, 2018. The following table presents a summary of the Company’s stock option activity and related information for the year ended December 31, 2020: Weighted Weighted Average Average Remaining Aggregate Exercise Contractual Intrinsic Options Shares Price Life (in Years) Value Balance of Outstanding Options at January 1, 2020 4,601,438 $ 20.41 Granted 753,600 22.28 Exercised (1,221,594 ) 16.04 Forfeited (52,500 ) 24.63 Balance of Outstanding Options at December 31, 2020 4,080,944 $ 22.01 6.4 $ 79,205,864 Expected to vest after December 31, 2020 2,705,026 $ 24.31 7.7 $ 46,284,768 Vested and exercisable at December 31, 2020 1,343,187 $ 17.31 3.8 $ 32,378,174 The aggregate intrinsic value in the preceding table represents the total pretax intrinsic value, based on the closing price of the Company’s Class A Common Stock on December 31, 2020, December 31, 2020, December 31, 2019, December 31, 2018. The following table presents a summary of the status of the number of shares underlying Company’s non-vested stock options as of December 31, 2020, December 31, 2020: Weighted Average Number of Grant Date Non-vested Shares Shares Fair Value Non-vested at January 1, 2020 2,712,147 $ 8.07 Granted 753,600 6.36 Vested (675,490 ) 6.69 Forfeited (52,500 ) 7.91 Non-vested at December 31, 2020 2,737,757 $ 7.95 The total fair value of vested options was $4.5 million during the year ended December 31, 2020, December 31, 2019, December 31, 2018. December 31, 2020, December 31, 2019, December 31, 2018. Stock Awards The Company granted restricted stock awards to certain of its employees under the 2007 December 31, 2020. three second third The following table presents a summary of the Company’s non-vested restricted stock awards and restricted stock unit awards outstanding at December 31, 2020: Weighted Average Weighted Remaining Aggregate Average Contractual Intrinsic Grant Date Stock Awards and Units Shares Life (in Years) Value Fair Value Outstanding non-vested shares at January 1, 2020 915,604 $ 26.04 Granted 543,528 21.98 Vested (471,404 ) 25.04 Outstanding non-vested at December 31, 2020 987,728 8.6 $ 37,425,013 $ 24.28 Expected to vest after December 31, 2020 986,332 8.6 $ 37,372,147 The total fair value of the shares issued upon the vesting of restricted and unrestricted stock awards and restricted stock unit awards during the year ended December 31, 2020 December 31, 2020, December 31, 2019 December 31, 2018. As of December 31, 2020, Defined Contribution Plan The Company has a defined contribution plan (the “Rush 401k 30 401k first may February 1, 2012, first five five June 16, 2020, first five five 401k December 31, 2020, December 31, 2019 December 31, 2018. Deferred Compensation Plan On November 6, 2010, may first January 1, 2011. December 31, 2020 December 31, 2019. December 31, 2020 December 31, 2019. The Company currently does not

Note 12 - Earnings Per Share

Note 12 - Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Earnings Per Share [Text Block]	12. EARNINGS PER SHARE Basic earnings per share (“EPS”) were computed by dividing income from continuing operations by the weighted average number of shares of common stock outstanding during the period. Diluted EPS differs from basic EPS due to the assumed conversions of potentially dilutive options, restricted shares awards and restricted stock unit awards that were outstanding during the period. Each share of Class A Common Stock ranks equal to each share of Class B Common Stock with respect to receipt of any dividends or distributions declared on shares of common stock and the right to receive proceeds on liquidation or dissolution of the Company after payment of its indebtedness and liquidation preference payments to holders of any preferred shares. However, holders of Class A Common Stock have 1/20th one The following is a reconciliation of the numerators and the denominators of the basic and diluted per share computations for income from continuing operations (in thousands, except per share amounts): 2020 2019 2018 Numerator- Numerator for basic and diluted earnings per share − Net income available to common shareholders $ 114,887 $ 141,583 $ 139,062 Denominator- Denominator for basic earnings per share – weighted average shares outstanding 54,866 54,988 58,835 Effect of dilutive securities− Employee and director stock options and restricted share awards 1,376 1,368 1,605 Denominator for diluted earnings per share − adjusted weighted average shares outstanding and assumed conversions 56,242 56,356 60,440 Basic earnings per common share $ 2.09 $ 2.57 $ 2.36 Diluted earnings per common share and common share equivalents $ 2.04 $ 2.51 $ 2.30 Options to purchase shares of common stock that were outstanding for the years ended December 31, 2020, 2019 2018 not 2020 2019 2018 Anti-dilutive options – weighted average 1,349 1,663 769

Note 13 - Income Taxes

Note 13 - Income Taxes	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	13. INCOME TAXE S : The tax provisions are summarized as follows (in thousands): Year Ended December 31, 2020 2019 2018 Income before income taxes: Domestic $ 146,055 $ 188,174 $ 183,169 Foreign 5,668 1,349 - Total 151,723 189,523 183,169 Current provision Federal $ 67,988 $ 20,303 $ 31,819 State 6,706 4,648 6,291 Total 74,694 24,951 38,110 Deferred provision Federal (37,683 ) 20,925 6,082 State (1,254 ) 2,064 (85 ) Foreign 1,079 - - Total (37,858 ) 22,989 5,997 Provision (benefit) for income taxes $ 36,836 $ 47,940 $ 44,107 A reconciliation of taxes based on the federal statutory rates and the provisions (benefits) for income taxes are summarized as follows (in thousands): Year Ended December 31, 2020 2019 2018 Income taxes at the federal statutory rate $ 31,862 $ 39,530 $ 38,469 State income taxes, net of federal benefit 4,487 5,303 4,913 Tax effect of permanent differences 283 1,562 596 Foreign tax rate differential (111 ) - - Other, net 315 1,545 129 Provision (benefit) for income taxes $ 36,836 $ 47,940 $ 44,107 The following summarizes the components of net deferred income tax liabilities included in the balance sheet (in thousands): December 31, 2020 2019 Deferred income tax (assets) liabilities: Inventory $ (4,329 ) $ (5,086 ) Accounts receivable (168 ) (140 ) Finance lease obligations (27,522 ) (21,618 ) Finance and operating leases (13,607 ) (12,726 ) Stock options (7,463 ) (8,749 ) Accrued liabilities (7,680 ) (2,989 ) State net operating loss carry forward (1,101 ) (2,381 ) State tax credit (193 ) (196 ) Other (3,302 ) (3,817 ) Difference between book and tax basis- Operating lease assets 13,444 12,628 Difference between book and tax basis- Depreciation and amortization 178,360 209,250 126,439 164,176 Valuation allowance - 121 Net deferred income tax liability $ 126,439 $ 164,297 As of December 31, 2020, 2020 2039, not December 31, 2019. The Company had unrecognized income tax benefits totaling $3.3 million as a component of accrued liabilities as of December 31, 2020, December 31, 2019, December 31, 2020, 2019 2018, December 31, 2020, 2019 2018, Undistributed earnings of certain of the Company’s foreign subsidiaries amounted to approximately $7.0 million at December 2020. may The Company does not 12 December 31, 2020, December 31, 2017 2020 December 31, 2016 2020, The table below presents the reconciliation of the change in the unrecognized tax benefits (in thousands): 2020 2019 2018 Unrecognized tax benefits at beginning of period $ 3,007 $ 2,389 $ 2,555 Gross increases – tax positions in current year 651 1,188 504 Reductions due to lapse of statute of limitations (353 ) (570 ) (670 ) Unrecognized tax benefits at end of period $ 3,306 $ 3,007 $ 2,389

Note 14 - Commitments and Conti

Note 14 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	14. COMMITMENTS AND CONTINGENCIES From time to time, the Company is involved in litigation arising out of its operations in the ordinary course of business. The Company maintains liability insurance, including product liability coverage, in amounts deemed adequate by management. To date, aggregate costs to the Company for claims, including product liability actions, have not not no no not

Note 15 - Acquisitions, Disposi

Note 15 - Acquisitions, Dispositions and Equity Method Investment	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Acquisitions, Dispositions and Equity Method Investment [Text Block]	15. ACQUISITIONS , DISPOSITIONS AND EQUITY METHOD INVESTMENT On October 31, 2019, On May 6, 2019, On February 25, 2019, 14 not December 31, 2020, On February 11, 2019,

Note 16 - Unaudited Quarterly F

Note 16 - Unaudited Quarterly Financial Data	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Quarterly Financial Information [Text Block]	16. UNAUDITED QUARTERLY FINANCIAL DATA (In thousands, except per share amounts.) First Second Third Fourth Quarter Quarter Quarter Quarter 20 20 Revenues $ 1,286,663 $ 1,002,512 $ 1,178,568 $ 1,268,197 Gross profit 234,501 192,331 212,452 236,183 Operating income 35,197 23,001 42,868 53,539 Income before income taxes 31,669 22,512 43,928 53,614 Net income $ 23,107 $ 16,816 $ 33,939 $ 41,025 Earnings per share: Basic $ 0.42 $ 0.31 $ 0.62 $ 0.74 Diluted $ 0.41 $ 0.30 $ 0.60 $ 0.72 201 9 Revenues $ 1,348,317 $ 1,544,561 $ 1,599,265 $ 1,317,704 Gross profit 256,916 269,506 264,768 234,438 Operating income 56,867 61,792 58,323 39,423 Income before income taxes 49,558 54,410 52,210 33,345 Net income $ 37,104 $ 41,621 $ 39,104 $ 23,754 Earnings per share: Basic $ 0.67 $ 0.75 $ 0.71 $ 0.43 Diluted $ 0.65 $ 0.74 $ 0.70 $ 0.42

Note 17 - Segments

Note 17 - Segments	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	17. SEGMENTS The Company currently has one one not The Company also has revenues attributable to three None The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The Company evaluates performance based on operating income. The Company accounts for intersegment sales and transfers as if the sales or transfers were to third no December 31, 2020, 2019 2018. The following table contains summarized information about reportable segment revenue, segment income or loss from continuing operations and segment assets for the periods ended December 31, 2020, 2019 2018 Truck All Segment Other Totals 20 20 Revenues from external customers $ 4,721,058 $ 14,882 $ 4,735,940 Interest income 713 - 713 Interest expense 9,444 283 9,727 Depreciation and amortization 57,162 294 57,456 Segment operating income 153,841 764 154,605 Segment income from continuing operations before taxes 151,222 501 151,723 Segment assets 2,939,390 46,003 2,985,393 Goodwill 289,582 2,560 292,142 Expenditures for segment assets 135,956 244 136,200 201 9 Revenues from external customers $ 5,794,155 $ 15,692 $ 5,809,847 Interest income 1,680 - 1,680 Interest expense 30,201 286 30,487 Depreciation and amortization 55,036 336 55,372 Segment operating income (loss) 216,691 (286 ) 216,405 Segment income from continuing operations before taxes 188,122 1,401 189,523 Segment assets 3,369,517 37,812 3,407,329 Goodwill 289,582 2,560 292,142 Expenditures for segment assets 292,980 513 293,493 201 8 Revenues from external customers $ 5,488,787 $ 17,403 $ 5,506,190 Interest income 1,376 - 1,376 Interest expense 20,850 208 21,058 Depreciation and amortization 70,170 319 70,489 Segment operating income 202,725 126 202,851 Segment income (loss) from continuing operations before taxes 183,251 (82 ) 183,169 Segment assets 3,166,174 35,176 3,201,350 Goodwill 288,831 2,560 291,391 Expenditures for segment assets 238,229 31 238,260

Note 18 - Revenue

Note 18 - Revenue	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	18. RE VENUE The Company’s revenues are primarily generated from the sale of finished products to customers. Those sales predominantly contain a single delivery element and revenue for such sales is recognized when the customer obtains control, which is typically when the finished product is delivered to the customer. The Company’s material revenue streams have been identified as the following: the sale of new and used commercial vehicles, arrangement of associated commercial vehicle financing and insurance contracts, the performance of commercial vehicle repair services and the sale of commercial vehicle parts. Taxes collected from customers relating to product sales and remitted to governmental authorities are excluded from revenues. The following table summarizes the Company’s disaggregated revenue by revenue source for the years ended December 31, 2020, December 31, 2019 December 31, 2018 ( 2020 2019 2018 Commercial vehicle sales revenue $ 2,863,309 $ 3,757,584 $ 3,558,637 Parts revenue 911,102 993,288 937,241 Commercial vehicle repair service revenue 689,343 769,222 732,811 Finance revenue 12,047 14,618 10,795 Insurance revenue 9,902 9,825 9,740 Other revenue 14,014 17,761 18,728 Total $ 4,499,717 $ 5,562,298 $ 5,267,952 All of the Company's performance obligations are generally transferred to customers at a point in time. The Company does not December 31, 2020 December 31, 2019. For the sale of new and used commercial vehicles, revenue is recognized at a point in time when control is transferred to the customer, which is when delivery of the commercial vehicle occurs. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring the commercial vehicle. When control is transferred to the customer, the Company has an unconditional right to payment and a receivable is recorded for any consideration not The Company controls the commercial vehicle before it is transferred to the customer and it obtains all of the remaining benefits from the commercial vehicle relating to the sale, ability to pledge the asset or hold the asset. The Company is a principal in all commercial vehicle transactions. The Company retains inventory risk, determines the selling price to the customer and delivers the commercial vehicle to the customer. The Company generally pays a commission to internal sales representatives for the sale of a commercial vehicle. The Company will continue to expense the commission and recognize it concurrently with the respective commercial vehicle sale revenue upon delivery of the commercial vehicle to a customer. Revenue from the sale of parts is recognized when the Company transfers control of the goods to the customer and consideration has been received in the form of cash or a receivable from the customer. The Company provides its customers the right to return certain eligible parts, estimates the expected returns based on an analysis of historical experience and records an allowance for estimated returns, which has historically not Revenue from the sale of commercial vehicle repair service is recognized when the service performed by the Company on a customer’s vehicle is complete and the customer accepts the repair. Because the Company does not no Any remaining performance obligations represent service orders for which work has not one 606 one The Company receives commissions from third no not The Company receives commissions from third no not The Company records revenues from finance and insurance products at the net commission amount, which includes estimates of chargebacks that can occur if the underlying contract is not six not Other revenue is mostly documentation fees that are charged to customers in connection with the sale of a commercial vehicle and recognized as other revenue when a truck is sold. The Company recognizes the documentation fees at the point in time when the commercial vehicle is delivered to the customer.

Note 19 - Accumulated Other Com

Note 19 - Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	19. ACCUMULATED OTHER COMPREHENSIVE INCOME The following table shows the components of accumulated other comprehensive income (in thousands): Balance as of December 31, 2019 $ 337 Foreign currency translation adjustment 532 Balance as of December 31, 2020 $ 869 The equity method investment in RTC Canada was valued using the exchange rate of one December 31, 2020.

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The consolidated financial statements presented herein include the accounts of Rush Enterprises, Inc. together with its consolidated subsidiaries. All significant inter-company balances and transactions have been eliminated in consolidation.
Use of Estimates, Policy [Policy Text Block]	Estimates in Financial Statements The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents Cash and cash equivalents generally consist of cash and other money market instruments. The Company considers all highly liquid investments with an original maturity of ninety
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Credit Losses and Reposses s ion Losses The Company maintains an allowance for credit losses based on the probability of default, its historical rate of losses, aging and current economic conditions. Accounts receivable consists primarily of commercial vehicle sales receivables, manufacturers’ receivables, leasing and parts and service receivables and other trade receivables. The Company writes off account balances when it has exhausted reasonable collection efforts and determined that the likelihood of collection is remote. These write-offs are charged against the allowance for credit losses. The Company provides an allowance for repossession losses after considering historical loss experience and other factors that might affect the ability of customers to meet their obligations on finance contracts sold by the Company when the Company has a potential liability.
Inventory, Policy [Policy Text Block]	Inventories Inventories are stated at the lower of cost or net realizable value. Cost is determined by specific identification of new and used commercial vehicle inventory and by the first first
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment Property and equipment are stated at cost and depreciated over their estimated useful lives. Leasehold improvements are amortized over the useful life of the improvement, or the term of the lease, whichever is shorter. Provision for depreciation of property and equipment is calculated primarily on a straight-line basis. The Company capitalizes interest on borrowings during the active construction period of major capital projects. Capitalized interest, when incurred, is added to the cost of underlying assets and is amortized over the estimated useful life of such assets. The Company recorded capitalized interest of approximately $163,500 related to major capital projects during 2020. 2020 2019 Estimated Life (Years) Land $ 136,024 $ 137,416 – Buildings and improvements 495,808 474,106 10 – 39 Leasehold improvements 38,767 34,350 2 – 39 Machinery and shop equipment 87,090 82,594 5 – 20 Furniture, fixtures and computers 81,834 73,846 3 – 15 Transportation equipment 96,319 99,127 3 – 15 Lease and rental vehicles 905,465 968,121 1 – 8 Construction in progress 2,989 16,874 Accumulated depreciation and amortization (640,577 ) (606,503 ) Total $ 1,203,719 $ 1,279,931 The Company recorded depreciation expense of $157.8 million and amortization expense of $19.5 million for the year ended December 31, 2020, December 31, 2019, December 31, 2018. As of December 31, 2020, December 31, 2020, December 31, 2019 December 31, 2018.
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill Goodwill is the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations accounted for under the purchase method. The Company tests goodwill for impairment annually during the fourth The impairment test for goodwill involves comparing the fair value of a reporting unit to its carrying amount, including goodwill. If the carrying amount of the reporting unit exceeds its fair value, a second second not No impairment write down was required in the fourth 2020. The carrying amount of goodwill for the Company for the years ended December 31, 2020 2019 $292.1
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	Other Assets ERP Platform The total capitalized costs of the Company’s SAP enterprise resource planning software platform (“the ERP Platform”) of $7.0 million are recorded on the Consolidated Balance Sheet in Other Assets. Amortization expense relating to the ERP Platform, which is recognized in depreciation and amortization expense in the Consolidated Statements of Income and Comprehensive Income, was $1.9 million for the year ended December 31, 2020 December 31, 2019. five In the first 2018, 350 40, first 2018, May 2018. February 2018 May 2018. 2018 Franchise Rights The Company’s only significant identifiable intangible assets, other than goodwill, are rights under franchise agreements with manufacturers. The fair value of the franchise right is determined at the acquisition date by discounting the projected cash flows specific to each acquisition. The carrying value of the Company’s manufacturer franchise rights was $7.0 million at December 31, 2020 2019, no not Due to the fact that manufacturer franchise rights are specific to a geographic region, the Company has determined that evaluating and including all locations acquired in the geographic region is the appropriate level for purposes of testing franchise rights for impairment. Management reviews indefinite-lived manufacturer franchise rights for impairment annually during the fourth may The significant estimates and assumptions used by management in assessing the recoverability of manufacturer franchise rights include estimated future cash flows, present value discount rate and other factors. Any changes in these estimates or assumptions could result in an impairment charge. The estimates of future cash flows, based on reasonable and supportable assumptions and projections, require management’s subjective judgment. Depending on the assumptions and estimates used, the estimated future cash flows projected in the evaluations of manufacturer franchise rights can vary within a range of outcomes. No impairment write-down was required in the period presented. The Company cannot predict the occurrence of certain events that might adversely affect the reported value of manufacturer franchise rights in the future. Equity Method Investment and Call Option On February 25, 2019, February 25, 2024. December 31, 2020, On April 25, 2019, CAD250 2019, not December 31, 2020 December 31, 2019, December 31, 2020,
Income Tax, Policy [Policy Text Block]	Income Taxes Management’s judgment is required to determine the provisions for income taxes and to determine whether deferred tax assets will be realized in full or in part. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. When it is more likely than not not not In determining its provision for income taxes, the Company uses an annual effective income tax rate based on annual income, permanent differences between book and tax income, and statutory income tax rates. The effective income tax rate also reflects its assessment of the ultimate outcome of tax audits. The Company adjusts its annual effective income tax rate as additional information on outcomes or events becomes available. Discrete events such as audit settlements or changes in tax laws are recognized in the period in which they occur. The Company’s income tax returns are periodically audited by tax authorities. These audits include questions regarding the Company’s tax filing positions, including the timing and amount of deductions. In evaluating the exposures associated with its various tax filing positions, the Company adjusts its liability for unrecognized tax benefits and income tax provision in the period in which an uncertain tax position is effectively settled, the statute of limitations expires for the relevant taxing authority to examine the tax position or when more information becomes available. The Company’s liability for unrecognized tax benefits contains uncertainties because management is required to make assumptions and to apply judgment to estimate the exposures associated with its various filing positions. The Company’s effective income tax rate is also affected by changes in tax law, the level of earnings and the results of tax audits. Although the Company believes that the judgments and estimates are reasonable, actual results could differ, and the Company may
Revenue [Policy Text Block]	Revenue Recognition Policies Effective January 1, 2018, 2014 09, Revenue from Contracts with Customers ( “ Topic 606 ” ) 606, 606, five five 606, 18
Cost of Goods and Service [Policy Text Block]	Cost of Sales For the Company’s new and used commercial vehicle operations, cost of sales consists primarily of the Company’s actual purchase price, plus make-ready expenses, less any applicable manufacturers’ incentives. For the Company’s parts operations, cost of sales consists primarily of the Company’s actual purchase price, less any applicable manufacturers’ incentives. For the Company’s service and collision center operations, technician labor cost is the primary component of cost of sales. For the Company’s rental and leasing operations, cost of sales consists primarily of depreciation and amortization, rent, maintenance costs, license costs and interest expense on the lease and rental fleet owned and leased by the Company. There are no
Lessee and Lessor Leases [Policy Text Block]	Leases The Company leases commercial vehicles and real estate under finance and operating leases. The Company determines whether an arrangement is a lease at its inception. For leases with terms greater than twelve When available, the Company uses the rate implicit in the lease to discount lease payments to present value; however, most of its leases do not The Company leases commercial vehicles that the Company owns to customers. Lease and rental revenue is recognized over the period of the related lease or rental agreement. Variable rental revenue is recognized when it is earned.
Sales Taxes, Policy [Policy Text Block]	Taxes Assessed by a Governmental Authority The Company accounts for sales taxes assessed by a governmental authority that are directly imposed on a revenue-producing transaction on a net (excluded from revenues) basis.
Selling, General and Administrative Expenses, Policy [Policy Text Block]	Selling, General and Administrative Expenses Selling, general and administrative expenses consist primarily of incentive based compensation for sales, finance and general management personnel, salaries for administrative personnel and expenses for rent, marketing, insurance, utilities, research and development and other general operating purposes.
Share-based Payment Arrangement [Policy Text Block]	Stock Based Compensation The Company applies the provisions of ASC topic 718 10, The Company uses the Black-Scholes option-pricing model to estimate the fair value of share-based payment awards on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods. Compensation expense for all share-based payment awards is recognized using the straight-line single-option method. Stock-based compensation expense is recognized based on awards expected to vest. Accordingly, stock based compensation expense has been reduced for estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company determines the fair value of share-based payment awards on the date of grant using an option-pricing model that is affected by the Company’s stock price, as well as assumptions regarding a number of highly complex and subjective variables. These variables include the Company’s expected stock price volatility over the term of the awards and actual and projected stock option exercise behaviors. Option-pricing models were developed for use in estimating the value of traded options that have no may not may not The following table reflects the weighted-average fair value of stock options granted during each period using the Black-Scholes option valuation model with the following weighted-average assumptions used: 2020 2019 2018 Expected stock volatility 33.11 % 31.29 % 31.68 % Weighted-average stock volatility 33.11 % 31.29 % 31.68 % Expected dividend yield 1.20 % 1.13 % 0.00 % Risk-free interest rate 0.80 % 2.45 % 2.69 % Expected life (years) 6.0 6.0 6.0 Weighted-average fair value of stock options granted $ 6.36 $ 8.37 $ 10.31 The Company computes its historical stock price volatility in accordance with ASC Topic 718 10.
Advertising Cost [Policy Text Block]	Advertising Costs Advertising costs are expensed as incurred. Advertising and marketing expense was $7.9 million for 2020, 2019 2018.
Internal Use Software, Policy [Policy Text Block]	Accounting for Internal Use Software The Company’s accounting policy with respect to accounting for computer software developed or obtained for internal use is consistent with ASC topic 350 40, December 31, 2020, December 31, 2019,
Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block]	Insurance The Company is partially self-insured for a portion of the claims related to its property and casualty insurance programs. Accordingly, the Company is required to estimate expected losses to be incurred. The Company engages a third third not
Fair Value Measurement, Policy [Policy Text Block]	Fair Value Measurements The Company has various financial instruments that it must measure at fair value on a recurring basis. See Note 9 Applicable accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). The Company measures its assets and liabilities using inputs from the following three Level 1 Level 2 not Level 3
Business Combinations Policy [Policy Text Block]	Acquisitions The Company uses the acquisition method of accounting for the recognition of assets acquired and liabilities assumed through acquisitions at their estimated fair values as of the date of acquisition. Any excess consideration transferred over the estimated fair values of the identifiable net assets acquired is recorded as goodwill. While the Company uses its best estimates and assumptions to measure the fair value of the identifiable assets acquired and liabilities assumed at the acquisition date, the estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which is not one
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In June 2016, No. 2016 13, "Financial Instruments - Credit Losses (Topic 326 January 1, 2020. not In March 2020, 2020 04, Reference Rate Reform (Topic 848 , ” December 31, 2022.

Note 2 - Significant Accounti_2

Note 2 - Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Property, Plant and Equipment [Table Text Block]	2020 2019 Estimated Life (Years) Land $ 136,024 $ 137,416 – Buildings and improvements 495,808 474,106 10 – 39 Leasehold improvements 38,767 34,350 2 – 39 Machinery and shop equipment 87,090 82,594 5 – 20 Furniture, fixtures and computers 81,834 73,846 3 – 15 Transportation equipment 96,319 99,127 3 – 15 Lease and rental vehicles 905,465 968,121 1 – 8 Construction in progress 2,989 16,874 Accumulated depreciation and amortization (640,577 ) (606,503 ) Total $ 1,203,719 $ 1,279,931
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2020 2019 2018 Expected stock volatility 33.11 % 31.29 % 31.68 % Weighted-average stock volatility 33.11 % 31.29 % 31.68 % Expected dividend yield 1.20 % 1.13 % 0.00 % Risk-free interest rate 0.80 % 2.45 % 2.69 % Expected life (years) 6.0 6.0 6.0 Weighted-average fair value of stock options granted $ 6.36 $ 8.37 $ 10.31

Note 4 - Accounts Receivable (T

Note 4 - Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	December 31, 2020 2019 Trade accounts receivable from sale of vehicles $ 82,338 $ 82,991 Trade receivables other than vehicles 58,689 68,376 Warranty claims 9,032 16,819 Other accounts receivable 24,027 16,942 Less allowance for credit losses (1,605 ) (1,424 ) Total $ 172,481 $ 183,704

Note 5 - Inventories (Tables)

Note 5 - Inventories (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, 2020 2019 New commercial vehicles $ 563,097 $ 967,785 Used commercial vehicles 56,214 84,610 Parts and accessories 238,195 273,185 Other 16,175 17,763 Less allowance (15,390 ) (17,263 ) Total $ 858,291 $ 1,326,080

Note 6 - Valuation Accounts (Ta

Note 6 - Valuation Accounts (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Summary of Valuation Allowance [Table Text Block]	Balance Beginning of Year Net Charged to Costs and Expenses Net Write- Offs Balance End of Year 2020 Reserve for parts inventory $ 7,661 $ 4,501 $ (2,847 ) $ 9,315 Reserve for commercial vehicle inventory 9,602 9,598 (13,125 ) 6,075 2019 Reserve for accounts receivable $ 987 $ 2,065 $ (2,038 ) $ 1,014 Reserve for warranty receivables 429 1,661 (1,680 ) 410 Reserve for parts inventory 7,050 4,460 (3,849 ) 7,661 Reserve for commercial vehicle inventory 4,587 12,489 (7,474 ) 9,602 2018 Reserve for accounts receivable $ 616 $ 2,183 $ (1,812 ) $ 987 Reserve for warranty receivables 210 2,031 (1,812 ) 429 Reserve for parts inventory 6,230 2,744 (1,924 ) 7,050 Reserve for commercial vehicle inventory 5,953 3,550 (4,916 ) 4,587
Financing Receivable, Allowance for Credit Loss [Table Text Block]	Balance December 31, 2019 Provision for the Year Ended December 31, 2020 Write offs Against Allowance, net of Recoveries Balance December 31, 2020 Commercial vehicle receivables $ 11 $ 161 $ - $ 172 Manufacturers’ receivables 410 1,169 (1,443 ) 136 Leasing, parts and service receivables 989 1,852 (1,563 ) 1,278 Other receivables 14 21 (16 ) 19 Total $ 1,424 $ 3,203 $ (3,022 ) $ 1,605

Note 7 - Floor Plan Notes Pay_2

Note 7 - Floor Plan Notes Payable and Lines of Credit (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Assets Pledged As Collateral [Table Text Block]	December 31, 2020 2019 Inventories, new and used vehicles at cost based on specific identification, net of allowance $ 613,236 $ 1,042,794 Vehicle sale related accounts receivable 82,338 82,991 Total $ 695,574 $ 1,125,785 Floor plan notes payable related to vehicles $ 511,786 $ 996,336

Note 8 - Long-term Debt (Tables

Note 8 - Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	December 31, 2020 2019 Variable interest rate term notes $ 40,975 $ 58,416 Fixed interest rate term notes 488,679 569,262 Total debt 529,654 627,678 Less: current maturities (141,672 ) (189,265 ) Total long-term debt, net of current maturities $ 387,982 $ 438,413
Schedule of Maturities of Long-term Debt [Table Text Block]	2021 141,672 2022 125,511 2023 107,145 2024 81,916 2025 46,778 Thereafter 26,632 Total $ 529,654

Note 10 - Leases (Tables)

Note 10 - Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Lease, Cost [Table Text Block]	Twelve Months Ended Component Classification December 31, 2020 December 31, 2019 Operating lease cost SG&A expense $ 9,986 $ 9,479 Operating lease cost Lease and rental cost of products sold 4,654 4,154 Finance lease cost – amortization of right-of-use assets Lease and rental cost of products sold 16,791 14,312 Finance lease cost – interest on lease liabilities Lease and rental cost of products sold 4,678 3,372 Short-term lease cost SG&A expense 66 594 Twelve Months Ended December 31, 2020 December 31, 2019 Operating cash flow information: Cash paid for amounts included in the measurement of lease liabilities $ 19,318 $ 17,005 Financing cash flow information: Cash paid for amounts included in the measurement of lease liabilities $ 11,192 $ 8,331 Non-cash activity: Operating lease right-of-use assets obtained in exchange for lease obligations $ 16,545 $ 57,197 Weighted-average remaining lease term (in months) 68 Weighted-average discount rate 5.3 %
Lessee, Lease Liability, Maturity [Table Text Block]	Finance Leases Operating Leases 2021 $ 31,579 $ 13,055 2022 25,714 11,333 2023 21,553 9,890 2024 22,797 9,835 2025 15,837 6,242 2026 and beyond 16,931 28,572 Total lease payments $ 134,411 $ 78,927 Less: Imputed interest (17,298 ) (17,576 ) Present value of lease liabilities $ 117,113 $ 61,351
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block]	2021 $ 130,063 2022 105,791 2023 82,312 2024 57,813 2025 32,112 Thereafter 17,927 Total $ 426,018
Leases, Lease Income [Table Text Block]	2020 2019 Minimum rental payments $ 205,640 $ 215,288 Nonlease payments 30,583 32,261 Total $ 236,223 $ 247,549

Note 11 - Share Based Compens_2

Note 11 - Share Based Compensation and Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted Weighted Average Average Remaining Aggregate Exercise Contractual Intrinsic Options Shares Price Life (in Years) Value Balance of Outstanding Options at January 1, 2020 4,601,438 $ 20.41 Granted 753,600 22.28 Exercised (1,221,594 ) 16.04 Forfeited (52,500 ) 24.63 Balance of Outstanding Options at December 31, 2020 4,080,944 $ 22.01 6.4 $ 79,205,864 Expected to vest after December 31, 2020 2,705,026 $ 24.31 7.7 $ 46,284,768 Vested and exercisable at December 31, 2020 1,343,187 $ 17.31 3.8 $ 32,378,174
Schedule of Nonvested Share Activity [Table Text Block]	Weighted Average Number of Grant Date Non-vested Shares Shares Fair Value Non-vested at January 1, 2020 2,712,147 $ 8.07 Granted 753,600 6.36 Vested (675,490 ) 6.69 Forfeited (52,500 ) 7.91 Non-vested at December 31, 2020 2,737,757 $ 7.95
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Weighted Average Weighted Remaining Aggregate Average Contractual Intrinsic Grant Date Stock Awards and Units Shares Life (in Years) Value Fair Value Outstanding non-vested shares at January 1, 2020 915,604 $ 26.04 Granted 543,528 21.98 Vested (471,404 ) 25.04 Outstanding non-vested at December 31, 2020 987,728 8.6 $ 37,425,013 $ 24.28 Expected to vest after December 31, 2020 986,332 8.6 $ 37,372,147

Note 12 - Earnings Per Share (T

Note 12 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	2020 2019 2018 Numerator- Numerator for basic and diluted earnings per share − Net income available to common shareholders $ 114,887 $ 141,583 $ 139,062 Denominator- Denominator for basic earnings per share – weighted average shares outstanding 54,866 54,988 58,835 Effect of dilutive securities− Employee and director stock options and restricted share awards 1,376 1,368 1,605 Denominator for diluted earnings per share − adjusted weighted average shares outstanding and assumed conversions 56,242 56,356 60,440 Basic earnings per common share $ 2.09 $ 2.57 $ 2.36 Diluted earnings per common share and common share equivalents $ 2.04 $ 2.51 $ 2.30
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	2020 2019 2018 Anti-dilutive options – weighted average 1,349 1,663 769

Note 13 - Income Taxes (Tables)

Note 13 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, 2020 2019 2018 Income before income taxes: Domestic $ 146,055 $ 188,174 $ 183,169 Foreign 5,668 1,349 - Total 151,723 189,523 183,169 Current provision Federal $ 67,988 $ 20,303 $ 31,819 State 6,706 4,648 6,291 Total 74,694 24,951 38,110 Deferred provision Federal (37,683 ) 20,925 6,082 State (1,254 ) 2,064 (85 ) Foreign 1,079 - - Total (37,858 ) 22,989 5,997 Provision (benefit) for income taxes $ 36,836 $ 47,940 $ 44,107
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 2020 2019 2018 Income taxes at the federal statutory rate $ 31,862 $ 39,530 $ 38,469 State income taxes, net of federal benefit 4,487 5,303 4,913 Tax effect of permanent differences 283 1,562 596 Foreign tax rate differential (111 ) - - Other, net 315 1,545 129 Provision (benefit) for income taxes $ 36,836 $ 47,940 $ 44,107
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 2020 2019 Deferred income tax (assets) liabilities: Inventory $ (4,329 ) $ (5,086 ) Accounts receivable (168 ) (140 ) Finance lease obligations (27,522 ) (21,618 ) Finance and operating leases (13,607 ) (12,726 ) Stock options (7,463 ) (8,749 ) Accrued liabilities (7,680 ) (2,989 ) State net operating loss carry forward (1,101 ) (2,381 ) State tax credit (193 ) (196 ) Other (3,302 ) (3,817 ) Difference between book and tax basis- Operating lease assets 13,444 12,628 Difference between book and tax basis- Depreciation and amortization 178,360 209,250 126,439 164,176 Valuation allowance - 121 Net deferred income tax liability $ 126,439 $ 164,297
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	2020 2019 2018 Unrecognized tax benefits at beginning of period $ 3,007 $ 2,389 $ 2,555 Gross increases – tax positions in current year 651 1,188 504 Reductions due to lapse of statute of limitations (353 ) (570 ) (670 ) Unrecognized tax benefits at end of period $ 3,306 $ 3,007 $ 2,389

Note 16 - Unaudited Quarterly_2

Note 16 - Unaudited Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Quarterly Financial Information [Table Text Block]	First Second Third Fourth Quarter Quarter Quarter Quarter 20 20 Revenues $ 1,286,663 $ 1,002,512 $ 1,178,568 $ 1,268,197 Gross profit 234,501 192,331 212,452 236,183 Operating income 35,197 23,001 42,868 53,539 Income before income taxes 31,669 22,512 43,928 53,614 Net income $ 23,107 $ 16,816 $ 33,939 $ 41,025 Earnings per share: Basic $ 0.42 $ 0.31 $ 0.62 $ 0.74 Diluted $ 0.41 $ 0.30 $ 0.60 $ 0.72 201 9 Revenues $ 1,348,317 $ 1,544,561 $ 1,599,265 $ 1,317,704 Gross profit 256,916 269,506 264,768 234,438 Operating income 56,867 61,792 58,323 39,423 Income before income taxes 49,558 54,410 52,210 33,345 Net income $ 37,104 $ 41,621 $ 39,104 $ 23,754 Earnings per share: Basic $ 0.67 $ 0.75 $ 0.71 $ 0.43 Diluted $ 0.65 $ 0.74 $ 0.70 $ 0.42

Note 17 - Segments (Tables)

Note 17 - Segments (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Truck All Segment Other Totals 20 20 Revenues from external customers $ 4,721,058 $ 14,882 $ 4,735,940 Interest income 713 - 713 Interest expense 9,444 283 9,727 Depreciation and amortization 57,162 294 57,456 Segment operating income 153,841 764 154,605 Segment income from continuing operations before taxes 151,222 501 151,723 Segment assets 2,939,390 46,003 2,985,393 Goodwill 289,582 2,560 292,142 Expenditures for segment assets 135,956 244 136,200 201 9 Revenues from external customers $ 5,794,155 $ 15,692 $ 5,809,847 Interest income 1,680 - 1,680 Interest expense 30,201 286 30,487 Depreciation and amortization 55,036 336 55,372 Segment operating income (loss) 216,691 (286 ) 216,405 Segment income from continuing operations before taxes 188,122 1,401 189,523 Segment assets 3,369,517 37,812 3,407,329 Goodwill 289,582 2,560 292,142 Expenditures for segment assets 292,980 513 293,493 201 8 Revenues from external customers $ 5,488,787 $ 17,403 $ 5,506,190 Interest income 1,376 - 1,376 Interest expense 20,850 208 21,058 Depreciation and amortization 70,170 319 70,489 Segment operating income 202,725 126 202,851 Segment income (loss) from continuing operations before taxes 183,251 (82 ) 183,169 Segment assets 3,166,174 35,176 3,201,350 Goodwill 288,831 2,560 291,391 Expenditures for segment assets 238,229 31 238,260

Note 18 - Revenue (Tables)

Note 18 - Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Disaggregation of Revenue [Table Text Block]	2020 2019 2018 Commercial vehicle sales revenue $ 2,863,309 $ 3,757,584 $ 3,558,637 Parts revenue 911,102 993,288 937,241 Commercial vehicle repair service revenue 689,343 769,222 732,811 Finance revenue 12,047 14,618 10,795 Insurance revenue 9,902 9,825 9,740 Other revenue 14,014 17,761 18,728 Total $ 4,499,717 $ 5,562,298 $ 5,267,952

Note 19 - Accumulated Other C_2

Note 19 - Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Balance as of December 31, 2019 $ 337 Foreign currency translation adjustment 532 Balance as of December 31, 2020 $ 869

Note 1 - Organization and Ope_2

Note 1 - Organization and Operations (Details Textual)	Oct. 12, 2020$ / sharesshares	Sep. 15, 2020	Dec. 31, 2020$ / shares	Dec. 31, 2019$ / shares
Common Stock, Par or Stated Value Per Share (in dollars per share)			$ 0.01	$ 0.01
Common Class A [Member]
Additional Share Issued for Every Two Shares of Common Stock (in shares) | shares	1
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01
Common Class B [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01
Stock Split From [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		3
Stock Split To [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		2

Note 2 - Significant Accounti_3

Note 2 - Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 25, 2019
Depreciation, Total		$ 157,800,000	$ 158,700,000	$ 149,100,000
Amortization, Total		19,500,000	16,800,000	36,000,000
Goodwill, Impairment Loss	$ 0
Goodwill, Ending Balance	292,142,000	292,142,000	292,142,000	291,391,000
Capitalized Computer Software, Net, Ending Balance	7,000,000	7,000,000	8,900,000
Capitalized Computer Software, Amortization		1,900,000
Indefinite-Lived Franchise Rights	7,000,000	7,000,000	7,000,000
Advertising Expense		7,900,000	11,500,000	10,400,000
Capitalized Computer Software, Accumulated Amortization	12,100,000	12,100,000	10,200,000
Other Noncurrent Liabilities [Member] | Financial Guarantee [Member]
Guarantor Obligations, Current Carrying Value	5,200,000	5,200,000	$ 5,100,000
Equity Method Investments	32,000,000	32,000,000
Rush Truck Centres of Canada Limited [Member]
Equity Method Investment, Ownership Percentage			50.00%		50.00%
Rush Truck Centres of Canada Limited [Member] | Call Option [Member]
Equity Method Investment, Remaining Ownership Percentage Not Yet Acquired					50.00%
Rush Truck Centres of Canada Limited [Member] | Call Option [Member] | Other Assets [Member]
Call Option, Fair Value Disclosure	3,600,000	3,600,000
Computer Software, Intangible Asset [Member]
Capitalized Computer Software, Amortization			$ 1,900,000
Finite-Lived Intangible Asset, Expected Amortization, Year One	1,200,000	1,200,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,200,000	1,200,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1,200,000	1,200,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,200,000	1,200,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,200,000	1,200,000
Components of ERP Platform Rquired Replacement [Member]
Capitalized Computer Software, Amortization				19,900,000
Franchise Rights [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		0
Construction in Progress [Member]
Interest Costs Capitalized		163,500
Vehicles [Member]
Depreciation, Total		119,900,000	$ 120,100,000	$ 114,600,000
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	109,500,000	109,500,000
Finance Lease, Right-of-Use Asset, Accumulated Amortization	$ 40,200,000	$ 40,200,000

Note 2 - Significant Accounti_4

Note 2 - Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated depreciation and amortization	$ (640,577)	$ (606,503)
Total	1,203,719	1,279,931
Land [Member]
Property and equipment, gross	136,024	137,416
Building and Building Improvements [Member]
Property and equipment, gross	$ 495,808	474,106
Building and Building Improvements [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	10 years
Building and Building Improvements [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	39 years
Leasehold Improvements [Member]
Property and equipment, gross	$ 38,767	34,350
Leasehold Improvements [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	2 years
Leasehold Improvements [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	39 years
Machinery and Equipment [Member]
Property and equipment, gross	$ 87,090	82,594
Machinery and Equipment [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	20 years
Furniture and Fixtures [Member]
Property and equipment, gross	$ 81,834	73,846
Furniture and Fixtures [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	15 years
Transportation Equipment [Member]
Property and equipment, gross	$ 96,319	99,127
Transportation Equipment [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	3 years
Transportation Equipment [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	15 years
Vehicles [Member]
Property and equipment, gross	$ 905,465	968,121
Vehicles [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	1 year
Vehicles [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	8 years
Construction in Progress [Member]
Property and equipment, gross	$ 2,989	$ 16,874

Note 2 - Significant Accounti_5

Note 2 - Significant Accounting Policies - Fair Value Assumption (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Expected stock volatility	33.11%	31.29%	31.68%
Weighted-average stock volatility	33.11%	31.29%	31.68%
Expected dividend yield	1.20%	1.13%	0.00%
Risk-free interest rate	0.80%	2.45%	2.69%
Expected life (Year)	6 years	6 years	6 years
Weighted-average fair value of stock options granted (in dollars per share)	$ 6.36	$ 8.37	$ 10.31

Note 3 - Supplier Concentrati_2

Note 3 - Supplier Concentration (Details Textual)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Product Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	59.00%	61.60%	62.50%

Note 4 - Accounts Receivable -

Note 4 - Accounts Receivable - Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Warranty claims	$ 9,032	$ 16,819
Other accounts receivable	24,027	16,942
Less allowance for credit losses	(1,605)	(1,424)
Total	172,481	183,704
Trade Accounts Receivable From Sale of Vehicles [Member]
Trade receivables	82,338	82,991
Trade Receivable Other Than Vehicles [Member]
Trade receivables	$ 58,689	$ 68,376

Note 5 - Inventories - Inventor

Note 5 - Inventories - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
New commercial vehicles	$ 563,097	$ 967,785
Used commercial vehicles	56,214	84,610
Parts and accessories	238,195	273,185
Other	16,175	17,763
Less allowance	(15,390)	(17,263)
Total	$ 858,291	$ 1,326,080

Note 6 - Valuation Accounts - V

Note 6 - Valuation Accounts - Valuation and Allowance Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Parts Inventory [Member]
Balance	$ 7,661	$ 7,050	$ 6,230
Net Charged to Costs and Expenses	4,501	4,460	2,744
Net Write-Offs	(2,847)	(3,849)	(1,924)
Balance End of Year	9,315	7,661	7,050
Commercial Vehicle Inventory [Member]
Balance	9,602	4,587	5,953
Net Charged to Costs and Expenses	9,598	12,489	3,550
Net Write-Offs	(13,125)	(7,474)	(4,916)
Balance End of Year	6,075	9,602	4,587
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance	1,014	987	616
Net Charged to Costs and Expenses		2,065	2,183
Net Write-Offs		(2,038)	(1,812)
Balance End of Year		1,014	987
Allowance for Warranty Receivables From Manufacturers [Member]
Balance	$ 410	429	210
Net Charged to Costs and Expenses		1,661	2,031
Net Write-Offs		(1,680)	(1,812)
Balance End of Year		$ 410	$ 429

Note 6 - Valuation Accounts - A

Note 6 - Valuation Accounts - Allowance for Accounts Receivable (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Balance	$ 1,424
Current period provision	3,203
Balance	1,605
Write offs against allowance, net of recoveries	(3,022)
Commercial Vehicle Receivables [Member]
Balance	11
Current period provision	161
Balance	172
Manufacturers' Receivables [Member]
Balance	410
Current period provision	1,169
Balance	136
Write offs against allowance, net of recoveries	(1,443)
Leasing, Parts and Service Receivables [Member]
Balance	989
Current period provision	1,852
Balance	1,278
Write offs against allowance, net of recoveries	(1,563)
Other Receivables [Member]
Balance	14
Current period provision	21
Balance	19
Write offs against allowance, net of recoveries	$ (16)

Note 7 - Floor Plan Notes Pay_3

Note 7 - Floor Plan Notes Payable and Lines of Credit (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility, Maximum Borrowing Capacity	$ 17,500
Floor Plan Notes Payable	511,786	$ 996,336
Long-term Line of Credit, Total	0
Line of Credit Amount Pledged to Secure Letters of Credit	12,300
Line of Credit Facility, Remaining Borrowing Capacity	5,200
Floor Plan Credit Agreement [Member]
Floor Plan Notes Payable	$ 0
Debt, Weighted Average Interest Rate	1.20%	2.60%
BMO Harris Bank N.A. [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000
Debt Instrument, Working Capital Fee Percentage	0.16%
Floor Plan Notes Payable	$ 451,500
BMO Harris Bank N.A. [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Debt Instrument, Interest Rate, Effective Percentage	1.40%
Ford Motor Financing Agreement [Member] | Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Revolving Credit Facility [Member] | BMO Harris Bank N.A. [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 100,000
Long-term Line of Credit, Total	0
Letter of Credit [Member] | BMO Harris Bank N.A. [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 20,000

Note 7 - Floor Plan Notes Pay_4

Note 7 - Floor Plan Notes Payable and Lines of Credit - Assets Pledged as Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Inventories, new and used vehicles at cost based on specific identification, net of allowance	$ 613,236	$ 1,042,794
Vehicle sale related accounts receivable	82,338	82,991
Total	695,574	1,125,785
Floor Plan Notes Payable	$ 511,786	$ 996,336

Note 8 - Long-term Debt (Detail

Note 8 - Long-term Debt (Details Textual)	12 Months Ended
	Dec. 31, 2020USD ($)
Minimum [Member] | Variable Interest Rate Notes [Member]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.60%
Debt Instrument, Periodic Payment, Total	$ 5,330
Minimum [Member] | Fixed Interest Rate Notes [Member]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	2.00%
Debt Instrument, Periodic Payment, Total	$ 254
Maximum [Member] | Variable Interest Rate Notes [Member]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	3.50%
Debt Instrument, Periodic Payment, Total	$ 522,636
Maximum [Member] | Fixed Interest Rate Notes [Member]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	6.19%
Debt Instrument, Periodic Payment, Total	$ 72,316

Note 8 - Long-term Debt - Long-

Note 8 - Long-term Debt - Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Variable interest rate term notes	$ 40,975	$ 58,416
Fixed interest rate term notes	488,679	569,262
Total	529,654	627,678
Less: current maturities	(141,672)	(189,265)
Total long-term debt, net of current maturities	$ 387,982	$ 438,413

Note 8 - Long-term Debt - Debt

Note 8 - Long-term Debt - Debt Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
2021	$ 141,672
2022	125,511
2023	107,145
2024	81,916
2025	46,778
Thereafter	26,632
Total	$ 529,654	$ 627,678

Note 10 - Leases (Details Textu

Note 10 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Sublease Income	$ 26.9	$ 24
Lessee, Leases, Residual Value Guarantee, Amount	$ 59.5
Lessee, Operating Lease, Option To Terminate Term (Year)	1 year
Sales-type Lease, Lease Receivable	$ 5.6
Minimum [Member]
Lessee, Leases, Term of Contract (Month)	1 month
Lessee, Operating Lease, Term of Contract (Year)	1 year
Lessor, Leases, Term of Contract (Year)	1 year
Maximum [Member]
Lessee, Leases, Term of Contract (Month)	10 years
Lessee, Operating Lease, Term of Contract (Year)	83 years
Lessor, Leases, Term of Contract (Year)	10 years

Note 10 - Leases - Lease Cost (

Note 10 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities	$ 19,318	$ 17,005
Cash paid for amounts included in the measurement of lease liabilities	11,192	8,331	$ 12,429
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 16,545	57,197
Weighted-average remaining lease term (in months) (Month)	68 months
Weighted-average discount rate	5.30%
Selling, General and Administrative Expenses [Member]
Operating lease cost	$ 9,986	9,479
Short-term lease cost	66	594
Cost of Revenue, Lease and Rental [Member]
Operating lease cost	4,654	4,154
Depreciation and Amortization [Member]
Finance lease cost – amortization of right-of-use assets	16,791	14,312
Interest Expense [Member]
Finance lease cost – interest on lease liabilities	$ 4,678	$ 3,372

Note 10 - Leases - Maturities o

Note 10 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2020USD ($)
2021, finance leases	$ 31,579
2021, operating leases	13,055
2022, finance leases	25,714
2022, operating leases	11,333
2023, finance leases	21,553
2023, operating leases	9,890
2024, finance leases	22,797
2024, operating leases	9,835
2025, finance leases	15,837
2025, operating leases	6,242
2026 and beyond, finance leases	16,931
2024 and beyond, operating leases	28,572
Total lease payments, finance leases	134,411
Total lease payments, operating leases	78,927
Less: Imputed interest, finance leases	(17,298)
Less: Imputed interest, operating leases	(17,576)
Present value of lease liabilities, finance leases	117,113
Present value of lease liabilities, operating leases	$ 61,351

Note 10 - Leases - Future Minim

Note 10 - Leases - Future Minimum Rental Receivable (Details) $ in Thousands	Dec. 31, 2020USD ($)
2021	$ 130,063
2022	105,791
2023	82,312
2024	57,813
2025	32,112
Thereafter	17,927
Total	$ 426,018

Note 10 - Leases - Rental Incom

Note 10 - Leases - Rental Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Minimum rental payments	$ 205,640	$ 215,288
Nonlease payments	30,583	32,261
Total	$ 236,223	$ 247,549

Note 11 - Share Based Compens_3

Note 11 - Share Based Compensation and Employee Benefit Plans (Details Textual) - USD ($)	Jun. 16, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	May 12, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		753,600
Share-based Payment Arrangement, Expense		$ 19,400,000	$ 19,000,000	$ 18,100,000
Proceeds from Stock Options Exercised		23,500,000	11,100,000	5,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		20,800,000	8,700,000	2,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		$ 4,500,000	$ 5,000,000	$ 5,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)		$ 6.36	$ 8.37	$ 10.31
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 8,000,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		2 years 1 month 6 days
Deferred Compensation Plan [Member]
Deferred Compensation Arrangement with Individual, Vested Percentage		100.00%
Deferred Compensation Liability, Current, Total		$ 19,500,000	$ 15,600,000
Cash Surrender Value of Life Insurance		$ 11,500,000	10,600,000
Rush 401 Plan [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	10.00%	10.00%
Defined Contribution Plan, Cost		$ 6,000,000	$ 9,400,000	$ 8,900,000
Rush 401 Plan [Member] | Highly Compensated Employees [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent		15.00%
Rush 401 Plan [Member] | Employees with Less than Five Years of Service [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	5.00%	20.00%
Rush 401 Plan [Member] | Employees with More Than Five Years of Service [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	10.00%	40.00%
Rush 401 Plan [Member] | Minimum [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent		1.00%
Rush 401 Plan [Member] | Maximum [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent		50.00%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 11,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)		$ 21.98	$ 26.91	$ 26.97
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 7,800,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		1 year 3 months 18 days
Common Class A [Member]
Share Price (in dollars per share)		$ 41.42
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
Maximum Fair Value for Employee Stock Purchase Per Year		$ 25,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					600,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		743,716
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		2,700,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)		176,807	175,925
Number of Employees Eligible to Participate in Stock Purchase Plan		6,307
Number of Employees Participating in Stock Purchase Plan		1,650
The 2006 Non-Employee Director Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		750,000
Issuance of Cash for Non-employee Director Compensation, Percent		40.00%
Issuance of Stock and Cash for Non-employee Director Compensation		$ 125,000
The 2006 Non-Employee Director Stock Option Plan [Member] | Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		750,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		163,878
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)		25,128	21,560
The 2006 Non-Employee Director Stock Option Plan [Member] | Common Class A [Member] | Shares Issued to Three Non-employee Directors [Member]
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued (in shares)		5,235	4,756
The 2006 Non-Employee Director Stock Option Plan [Member] | Common Class A [Member] | Shares Issued to Two Nonemployee Directors [Member]
Issuance of Stock and Cash for Non-employee Director Compensation		$ 125,000		$ 125,000
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued (in shares)		3,141	2,854
Payment to Nonemployee Directors		$ 50,000	$ 50,000
The 2006 Non-Employee Director Stock Option Plan [Member] | Common Class A [Member] | Shares Issued to One Nonemployee Director [Member]
Issuance of Stock and Cash for Non-employee Director Compensation			$ 62,500
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued (in shares)			1,584
Payment to Nonemployee Directors			$ 18,750
Amended and Restated 2007 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)		10 years
Amended and Restated 2007 Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		3 years
Amended and Restated 2007 Incentive Plan [Member] | Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		13,200,000			13,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		2,736,479
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in shares)		150,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		753,600	723,995
Amended and Restated 2007 Incentive Plan [Member] | Common Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					4,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		1,648,275
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in shares)		150,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		518,400	476,385
Amended and Restated 2007 Incentive Plan [Member] | Common Class B [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		4,800,000
Every 6 Months [Member] | Employee Stock Purchase Plan [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount		$ 10,625

Note 11 - Share Based Compens_4

Note 11 - Share Based Compensation and Employee Benefit Plans - Stock Option (Details)	12 Months Ended
	Dec. 31, 2020USD ($)$ / sharesshares
Balance (in shares) | shares	4,601,438
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 20.41
Granted (in shares) | shares	753,600
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 22.28
Exercised (in shares) | shares	(1,221,594)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 16.04
Forfeited (in shares) | shares	(52,500)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 24.63
Balance (in shares) | shares	4,080,944
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 22.01
Balance, weighted average remaining contractual life (Year)	6 years 4 months 24 days
Aggregate intrinsic value | $	$ 79,205,864
Expected to vest (in shares) | shares	2,705,026
Expected to vest, weighted average exercise price (in dollars per share) | $ / shares	$ 24.31
Expected to vest, weighted average remaining contractual life (Year)	7 years 8 months 12 days
Expected to vest, aggregate intrinsic value | $	$ 46,284,768
Vested and exercisable (in shares) | shares	1,343,187
Vested and exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 17.31
Vested and exercisable, weighted average remaining contractual life (Year)	3 years 9 months 18 days
Vested and exercisable, aggregate intrinsic value | $	$ 32,378,174

Note 11 - Share Based Compens_5

Note 11 - Share Based Compensation and Employee Benefit Plans - Non-vested Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Non-vested balance (in shares)	2,712,147
Non-vested, weighted average grant date fair value (in dollars per share)	$ 8.07
Granted (in shares)	753,600
Weighted-average fair value of stock options granted (in dollars per share)	$ 6.36	$ 8.37	$ 10.31
Vested (in shares)	(675,490)
Vested, weighted average grant date fair value (in dollars per share)	$ 6.69
Forfeited (in shares)	(52,500)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 7.91
Non-vested balance (in shares)	2,737,757	2,712,147
Non-vested, weighted average grant date fair value (in dollars per share)	$ 7.95	$ 8.07

Note 11 - Share Based Compens_6

Note 11 - Share Based Compensation and Employee Benefit Plans - Non-vested Restricted Stock Awards and RSU's (Details) - Restricted Stock [Member]	12 Months Ended
	Dec. 31, 2020USD ($)$ / sharesshares
Outstanding non-vested shares (in shares)	915,604
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 26.04
Granted (in shares)	543,528
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 21.98
Vested (in shares)	(471,404)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 25.04
Outstanding non-vested shares (in shares)	987,728
Outstanding non-vested, weighted average remaining contractual life (Year)	8 years 7 months 6 days
Outstanding non-vested, aggregate intrinsic value | $	$ 37,425,013
Outstanding non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 24.28
Expected to vest (in shares)	986,332
Expected to vest, weighted average remaining contractual life (Year)	8 years 7 months 6 days
Expected to vest, aggregate intrinsic value | $	$ 37,372,147

Note 12 - Earnings Per Share (D

Note 12 - Earnings Per Share (Details Textual)	12 Months Ended
	Dec. 31, 2020
Common Class A [Member]
Common Stock, Voting Rights	1/20th
Common Class B [Member]
Common Stock, Voting Rights	one

Note 12 - Earnings Per Share -

Note 12 - Earnings Per Share - Earnings Per Share Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income available to common shareholders	$ 114,887	$ 141,583	$ 139,062
Denominator for basic earnings per share – weighted average shares outstanding (in shares)	54,866	54,988	58,835
Employee and director stock options and restricted share awards (in shares)	1,376	1,368	1,605
Denominator for diluted earnings per share - adjusted weighted average shares outstanding and assumed conversions (in shares)	56,242	56,356	60,440
Basic earnings per common share (in dollars per share)	$ 2.09	$ 2.57	$ 2.36
Diluted earnings per common share and common share equivalents (in dollars per share)	$ 2.04	$ 2.51	$ 2.30

Note 12 - Earnings Per Share _2

Note 12 - Earnings Per Share - Anti-dilutive Securities (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Anti-dilutive options – weighted average (in shares)	1,349	1,663	769

Note 13 - Income Taxes (Details

Note 13 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets, Valuation Allowance, Total	$ 0	$ 121,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3,300,000	3,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	6,150	5,220	$ (27,450)
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	150,000	$ 144,000	$ 139,000
Undistributed Earnings of Foreign Subsidiaries	$ 7,000,000
Effective Income Tax Rate Reconciliation, Dividend Received Deduction, Percent	100.00%
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 22,800,000
Deferred Tax Assets, Operating Loss Carryforwards, Total	$ 1,100,000
Open Tax Year	2017 2018 2019 2020
State and Local Jurisdiction [Member] | Deferred Tax Assets Related to Operating Loss Carryforwards [Member]
Deferred Tax Assets, Valuation Allowance, Total	$ 121,000
Domestic Tax Authority [Member]
Open Tax Year	2017 2018 2019 2020

Note 13 - Income Taxes - Income

Note 13 - Income Taxes - Income Tax Expense (Benefits) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Domestic									$ 146,055	$ 188,174	$ 183,169
Foreign									5,668	1,349	0
Income before taxes	$ 53,614	$ 43,928	$ 22,512	$ 31,669	$ 33,345	$ 52,210	$ 54,410	$ 49,558	151,723	189,523	183,169
Current provision
Federal, Current									67,988	20,303	31,819
State, Current									6,706	4,648	6,291
Total Current									74,694	24,951	38,110
Deferred provision
Federal, Deferred									(37,683)	20,925	6,082
State, Deferred									(1,254)	2,064	(85)
Foreign, Deferred									1,079	0	0
(Benefit) provision for deferred income tax expense									(37,858)	22,989	5,997
Provision (benefit) for income taxes									$ 36,836	$ 47,940	$ 44,107

Note 13 - Income Taxes - Reconc

Note 13 - Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income taxes at the federal statutory rate	$ 31,862	$ 39,530	$ 38,469
State income taxes, net of federal benefit	4,487	5,303	4,913
Tax effect of permanent differences	283	1,562	596
Foreign tax rate differential	(111)	0	0
Other, net	315	1,545	129
Provision (benefit) for income taxes	$ 36,836	$ 47,940	$ 44,107

Note 13 - Income Taxes - Deferr

Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred income tax (assets) liabilities:
Inventory	$ (4,329)	$ (5,086)
Accounts receivable	(168)	(140)
Finance lease obligations	(27,522)	(21,618)
Finance and operating leases	(13,607)	(12,726)
Stock options	(7,463)	(8,749)
Accrued liabilities	(7,680)	(2,989)
State net operating loss carry forward	(1,101)	(2,381)
State tax credit	(193)	(196)
Other	(3,302)	(3,817)
Difference between book and tax basis- Operating lease assets	13,444	12,628
Difference between book and tax basis- Depreciation and amortization	178,360	209,250
Total	126,439	164,176
Deferred Tax Assets, Valuation Allowance, Total	0	121
Net deferred income tax liability	$ 126,439	$ 164,297

Note 13 - Income Taxes - Unreco

Note 13 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unrecognized tax benefits at beginning of period	$ 3,007	$ 2,389	$ 2,555
Gross increases – tax positions in current year	651	1,188	504
Reductions due to lapse of statute of limitations	(353)	(570)	(670)
Unrecognized tax benefits at end of period	$ 3,306	$ 3,007	$ 2,389

Note 15 - Acquisitions, Dispo_2

Note 15 - Acquisitions, Dispositions and Equity Method Investment (Details Textual) - USD ($) $ in Thousands	Oct. 31, 2019	May 06, 2019	Feb. 11, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 25, 2019
Payments to Acquire Businesses, Gross				$ 0	$ 10,168	$ 0
Rush Truck Centres of Canada Limited [Member]
Equity Method Investment, Ownership Percentage					50.00%		50.00%
Rush Truck Centres of Canada Limited [Member] | Other Noncurrent Assets [Member]
Equity Method Investments				$ 32,000
Stover Sales, Inc [Member]
Payments to Acquire Businesses, Gross		$ 2,300
Acquisition of Country Ford Trucks [Member]
Payments to Acquire Businesses, Gross			$ 7,900
Central California Truck and Trailer Sales, LLC [Member]
Proceeds from Divestiture of Businesses	$ 12,700

Note 16 - Unaudited Quarterly_3

Note 16 - Unaudited Quarterly Financial Data - Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues	$ 1,268,197	$ 1,178,568	$ 1,002,512	$ 1,286,663	$ 1,317,704	$ 1,599,265	$ 1,544,561	$ 1,348,317	$ 4,735,940	$ 5,809,847	$ 5,506,190
Gross profit	236,183	212,452	192,331	234,501	234,438	264,768	269,506	256,916	875,467	1,025,628	978,269
Operating income	53,539	42,868	23,001	35,197	39,423	58,323	61,792	56,867	154,605	216,405	202,851
Income before income taxes	53,614	43,928	22,512	31,669	33,345	52,210	54,410	49,558	151,723	189,523	183,169
Net income	$ 41,025	$ 33,939	$ 16,816	$ 23,107	$ 23,754	$ 39,104	$ 41,621	$ 37,104	$ 114,887	$ 141,583	$ 139,062
Basic (in dollars per share)	$ 0.74	$ 0.62	$ 0.31	$ 0.42	$ 0.43	$ 0.71	$ 0.75	$ 0.67	$ 2.09	$ 2.57	$ 2.36
Diluted (in dollars per share)	$ 0.72	$ 0.60	$ 0.30	$ 0.41	$ 0.42	$ 0.70	$ 0.74	$ 0.65	$ 2.04	$ 2.51	$ 2.30

Note 17 - Segments (Details Tex

Note 17 - Segments (Details Textual)	12 Months Ended
	Dec. 31, 2020
Truck Segment [Member]
Number of Reportable Segments	1
Other Segments [Member]
Number of Operating Segments	3

Note 17 - Segments - Segment Re

Note 17 - Segments - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from external customers	$ 1,268,197	$ 1,178,568	$ 1,002,512	$ 1,286,663	$ 1,317,704	$ 1,599,265	$ 1,544,561	$ 1,348,317	$ 4,735,940	$ 5,809,847	$ 5,506,190
Interest income									713	1,680	1,376
Interest expense									9,727	30,487	21,058
Depreciation and amortization									57,456	55,372	70,489
Segment operating income	53,539	42,868	23,001	35,197	39,423	58,323	61,792	56,867	154,605	216,405	202,851
Segment income from continuing operations before taxes	53,614	$ 43,928	$ 22,512	$ 31,669	33,345	$ 52,210	$ 54,410	$ 49,558	151,723	189,523	183,169
Segment assets	2,985,393				3,407,329				2,985,393	3,407,329	3,201,350
Goodwill	292,142				292,142				292,142	292,142	291,391
Expenditures for segment assets									136,200	293,493	238,260
Truck Segment [Member]
Revenues from external customers									4,721,058	5,794,155	5,488,787
Interest income									713	1,680	1,376
Interest expense									9,444	30,201	20,850
Depreciation and amortization									57,162	55,036	70,170
Segment operating income									153,841	216,691	202,725
Segment income from continuing operations before taxes									151,222	188,122	183,251
Segment assets	2,939,390				3,369,517				2,939,390	3,369,517	3,166,174
Goodwill	289,582				289,582				289,582	289,582	288,831
Expenditures for segment assets									135,956	292,980	238,229
Other Segments [Member]
Revenues from external customers									14,882	15,692	17,403
Interest income									0	0	0
Interest expense									283	286	208
Depreciation and amortization									294	336	319
Segment operating income									764	(286)	126
Segment income from continuing operations before taxes									501	1,401	(82)
Segment assets	46,003				37,812				46,003	37,812	35,176
Goodwill	$ 2,560				$ 2,560				2,560	2,560	2,560
Expenditures for segment assets									$ 244	$ 513	$ 31

Note 18 - Revenue - Disaggregat

Note 18 - Revenue - Disaggregated Revenue by Revenue Source (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 4,499,717	$ 5,562,298	$ 5,267,952
Commercial Vehicle [Member]
Revenue	2,863,309	3,757,584	3,558,637
Parts [Member]
Revenue	911,102	993,288	937,241
Commercial Vehicle Repair Service [Member]
Revenue	689,343	769,222	732,811
Financial Service [Member]
Revenue	12,047	14,618	10,795
Insurance [Member]
Revenue	9,902	9,825	9,740
Product and Service, Other [Member]
Revenue	$ 14,014	$ 17,761	$ 18,728

Note 19 - Accumulated Other C_3

Note 19 - Accumulated Other Comprehensive Income (Details Textual)	Dec. 31, 2020
Rush Truck Centres of Canada Limited [Member]
Foreign Currency Exchange Rate, Translation	1.27

Note 19 - Accumulated Other C_4

Note 19 - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Balance	$ 1,159,493
Balance	1,268,037
AOCI Attributable to Parent [Member]
Balance	337
Foreign currency translation adjustment	532
Balance	$ 869