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Note 8 - Goodwill and Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015
Balance |  | $ 669,719 | $ 635,565 |  |
Acquisitions of businesses, net |  | 46,202 | 38,765 |  |
Impairment | $ (4,611) |  | (4,611) |  |
Balance | 669,719 | 704,640 | 669,719 |  |
Foreign currency translation |  | (11,281) |  |  |
Goodwill, gross |  |  |  | $ 1,212,444 | $ 1,177,523
Accumulated impairment |  |  |  | (507,804) | (507,804)
Goodwill | 669,719 | 669,719 | 635,565 | 704,640 | 669,719
Domestic [Member] |  |  |  |  |
Balance |  | 621,451 | 582,686 |  |
Acquisitions of businesses, net |  |  | 38,765 |  |
Impairment |  |  |  |  |
Balance | 621,451 | 621,451 | 621,451 |  |
Foreign currency translation |  |  |  |  |
Goodwill, gross |  |  |  | 1,124,644 | 1,124,644
Accumulated impairment |  |  |  | (503,193) | (503,193)
Goodwill | 621,451 | 621,451 | 582,686 | 621,451 | 621,451
International [Member] |  |  |  |  |
Balance |  | 48,268 | 52,879 |  |
Acquisitions of businesses, net |  | 46,202 |  |  |
Impairment |  |  | (4,611) |  |
Balance | 48,268 | 83,189 | 48,268 |  |
Foreign currency translation |  | (11,281) |  |  |
Goodwill, gross |  |  |  | 87,800 | 52,879
Accumulated impairment |  |  |  | (4,611) | (4,611)
Goodwill | $ 48,268 | $ 48,268 | $ 52,879 | $ 83,189 | $ 48,268

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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