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Note 2 - Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2019
Depreciation, Total |  |  | $ 149,100,000 | $ 140,300,000 | $ 140,600,000 |
Amortization, Total |  |  | 36,000,000 | 17,600,000 | 17,000,000 |
Capitalized Computer Software, Net, Ending Balance | $ 10,800,000 | $ 31,900,000 | 10,800,000 | 31,900,000 |  |
Capitalized Computer Software, Amortization |  |  | 21,700,000 | 3,400,000 |  |
Indefinite-Lived Franchise Rights | 7,000,000 | 7,000,000 | 7,000,000 | 7,000,000 |  |
Goodwill, Impairment Loss | 0 |  |  |  |  |
Advertising Expense |  |  | 10,400,000 | 9,500,000 | 6,800,000 |
Capitalized Computer Software, Accumulated Amortization | 8,300,000 | 20,000,000 | 8,300,000 | 20,000,000 |  |
Subsequent Event [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  |  | $ 51,900,000
Operating Lease, Liability, Total |  |  |  |  |  | $ 51,900,000
Vehicles [Member] |  |  |  |  |  |
Depreciation, Total |  |  | 114,600,000 | $ 107,900,000 | $ 106,300,000 |
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Net, Total | 66,400,000 |  | 66,400,000 |  |  |
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Property, Plant, and Equipment Other, Accumulated Depreciation | 44,600,000 |  | 44,600,000 |  |  |
Computer Software, Intangible Asset [Member] |  |  |  |  |  |
Interest Costs Capitalized |  |  | 357,600 |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  | $ 0 |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 1,900,000 |  | 1,900,000 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | 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 |  |  |

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