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Note 8 - Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Gross carrying amount | $ 270,629 | $ 214,482
Accumulated amortization | 87,593 | 74,925
Net | 183,036 | 139,557
Trademark and Trade Names [Member] |  |
Indefinite life | 24,121 | 23,604
Indefinite life | 24,121 | 23,604
Customer Lists and Relationships [Member] |  |
Gross carrying amount | 219,986 | 168,998
Accumulated amortization | 74,897 | 64,397
Net | 145,089 | 104,601
Franchise Rights [Member] |  |
Gross carrying amount | 5,703 | 5,301
Accumulated amortization | 4,156 | 3,478
Net | 1,547 | 1,823
Trademarks and Trade Names [Member] |  |
Gross carrying amount | 2,776 | 2,993
Accumulated amortization | 1,865 | 1,484
Net | 911 | 1,509
Management Contracts and Other [Member] |  |
Gross carrying amount | 17,733 | 13,586
Accumulated amortization | 6,572 | 5,566
Net | 11,161 | $ 8,020
Brokerage Backlog [Member] |  |
Gross carrying amount | 310 |
Accumulated amortization | 103 |
Net | $ 207 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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