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Note 8 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  | Domestic |  |  | International |  |  | Total |
Balance at December 31, 2014 |  | $ | 582,686 |  |  | $ | 52,879 |  |  | $ | 635,565 |
Acquisitions of businesses, net |  |  | 38,765 |  |  |  | - |  |  |  | 38,765 |
Impairment |  |  | - |  |  |  | (4,611 | ) |  |  | (4,611 | )
Balance at December 31, 2015 |  |  | 621,451 |  |  |  | 48,268 |  |  |  | 669,719 |
Acquisitions of businesses, net |  |  | - |  |  |  | 46,202 |  |  |  | 46,202 |
Foreign currency translation |  |  | - |  |  |  | (11,281 | ) |  |  | (11,281 | )
Balance at December 31, 2016 |  | $ | 621,451 |  |  | $ | 83,189 |  |  | $ | 704,640 |
|  | Year Ended December 31, 2016 |  |  | Year Ended December 31, 2015 |
|  | Gross |  |  | Accumulated Impairment |  |  | Net |  |  | Gross |  |  | Accumulated Impairment |  |  | Net |
Domestic |  | $ | 1,124,644 |  |  | $ | (503,193 | ) |  | $ | 621,451 |  |  | $ | 1,124,644 |  |  | $ | (503,193 | ) |  | $ | 621,451 |
International |  |  | 87,800 |  |  |  | (4,611 | ) |  |  | 83,189 |  |  |  | 52,879 |  |  |  | (4,611 | ) |  |  | 48,268 |
Total |  | $ | 1,212,444 |  |  | $ | (507,804 | ) |  | $ | 704,640 |  |  | $ | 1,177,523 |  |  | $ | (507,804 | ) |  | $ | 669,719 |
Schedule Of Intangible Assets [Table Text Block] |
|  | Weighted Average |  |  | December 31, 2016 |  |  | December 31, 2015 |
|  | Amortization Years |  |  | Gross |  |  | Accumulated Amortization |  |  | Net Book Value |  |  | Gross |  |  | Accumulated Amortization |  |  | Net Book Value |
Finite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tradenames |  |  | 8 |  |  | $ | 50,742 |  |  | $ | (20,189 | ) |  | $ | 30,553 |  |  | $ | 43,252 |  |  | $ | (10,516 | ) |  | $ | 32,736 |
Customer lists |  |  | 9 |  |  |  | 333,935 |  |  |  | (288,623 | ) |  |  | 45,312 |  |  |  | 314,600 |  |  |  | (275,287 | ) |  |  | 39,313 |
Patents |  |  | 14 |  |  |  | 130,099 |  |  |  | (82,038 | ) |  |  | 48,061 |  |  |  | 126,491 |  |  |  | (72,719 | ) |  |  | 53,772 |
Unpatented technology |  |  | 15 |  |  |  | 13,169 |  |  |  | (11,771 | ) |  |  | 1,398 |  |  |  | 13,169 |  |  |  | (11,628 | ) |  |  | 1,541 |
Software |  |  | - |  |  |  | 1,046 |  |  |  | (1,046 | ) |  |  | - |  |  |  | 1,046 |  |  |  | (1,042 | ) |  |  | 4 |
Non-compete/other |  |  | 7 |  |  |  | 2,513 |  |  |  | (986 | ) |  |  | 1,527 |  |  |  | 1,731 |  |  |  | (508 | ) |  |  | 1,223 |
Total finite-lived intangible assets |  |  |  |  | $ | 531,504 |  |  | $ | (404,653 | ) |  | $ | 126,851 |  |  | $ | 500,289 |  |  | $ | (371,700 | ) |  | $ | 128,589 |
Indefinite-lived tradenames |  |  |  |  |  |  | 128,321 |  |  |  | - |  |  |  | 128,321 |  |  |  | 128,321 |  |  |  | - |  |  |  | 128,321 |
Total intangible assets |  |  |  |  |  | $ | 659,825 |  |  | $ | (404,653 | ) |  | $ | 255,172 |  |  | $ | 628,610 |  |  | $ | (371,700 | ) |  | $ | 256,910 |

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