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Note 2 - Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Depreciation |  | $ 140,300,000 | $ 140,600,000 | $ 131,800,000
Amortization |  | 17,600,000 | 17,000,000 | 13,100,000
Capitalized Computer Software, Net | $ 31,900,000 | 31,900,000 | 33,000,000 |
Capitalized Computer Software, Accumulated Amortization | 20,000,000 | 20,000,000 | 16,500,000 |
Indefinite-Lived Franchise Rights |  |  | 7,000,000 |
Goodwill, Impairment Loss | 0 |  |  |
Advertising Expense |  | 9,500,000 | 6,800,000 | 8,800,000
Income Tax Expense (Benefit) |  | (35,730,000) | 25,867,000 | 41,750,000
Accounting Standards Update 2016-09 [Member] |  |  |  |
Income Tax Expense (Benefit) |  | (5,300,000) |  |
Vehicles [Member] |  |  |  |
Depreciation |  | 107,900,000 | 106,300,000 | 101,100,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Net | 79,800,000 | 79,800,000 |  |
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Property, Plant, and Equipment Other, Accumulated Depreciation | 38,700,000 | 38,700,000 |  |
Computer Software, Intangible Asset [Member] |  |  |  |
Interest Costs Capitalized |  | $ 85,500 |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 0 |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 15 years |  |
Amortization of Intangible Assets |  | $ 3,400,000 | $ 3,400,000 | $ 3,300,000

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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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