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v3.19.3.a.u2

Note 2 - Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Feb. 25, 2019
Depreciation, Total |  | $ 158,700,000 | $ 149,100,000 | $ 140,300,000 |
Amortization, Total |  | 16,800,000 | 36,000,000.0 | 17,600,000 |
Goodwill, Impairment Loss | $ 0 |  |  |  |
Capitalized Computer Software, Net, Ending Balance | 8,900,000 | 8,900,000 | 10,800,000 |  |
Capitalized Computer Software, Amortization |  | 1,900,000 | 21,700,000 |  |
Indefinite-Lived Franchise Rights | 7,000,000.0 | 7,000,000.0 | 7,000,000.0 |  |
Advertising Expense |  | 11,500,000 | 10,400,000 | 9,500,000 |
Capitalized Computer Software, Accumulated Amortization | 10,200,000 | 10,200,000 | 8,300,000 |  |
Other Noncurrent Liabilities [Member] | Financial Guarantee [Member] |  |  |  |  |
Guarantor Obligations, Current Carrying Value | $ 5,100,000 | $ 5,100,000 |  |  |
Rush Truck Centres of Canada Limited [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% | 50.00% |  |  | 50.00%
Rush Truck Centres of Canada Limited [Member] | Other Assets [Member] |  |  |  |  |
Equity Method Investments | $ 25,700,000 | $ 25,700,000 |  |  |
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] |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | 1,900,000 | 1,900,000 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 1,900,000 | 1,900,000 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 1,900,000 | 1,900,000 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 1,900,000 | 1,900,000 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 1,900,000 | 1,900,000 |  |  |
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 |  | 387,800 |  |  |
Vehicles [Member] |  |  |  |  |
Depreciation, Total |  | 120,100,000 | $ 114,600,000 | $ 107,900,000 |
Finance Lease, Right-of-Use Asset | 85,800,000 | 85,800,000 |  |  |
Finance Lease, Right-of-Use Asset, Accumulated Amortization | $ 43,000,000.0 | $ 43,000,000.0 |  |  |

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