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Note 9 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] |
|  | Year Ended December 31, 2014 |  |  | Year Ended December 31, 2013 |
|  | Gross |  |  | Accumulated Impairment |  |  | Net |  |  | Gross |  |  | Accumulated Impairment |  |  | Net |
Balance at beginning of year |  | $ | 1,111,480 |  |  | $ | (503,193 | ) |  | $ | 608,287 |  |  | $ | 1,056,136 |  |  | $ | (503,193 | ) |  | $ | 552,943 |
Acquisitions of businesses, net |  |  | 27,278 |  |  |  | - |  |  | $ | 27,278 |  |  |  | 56,605 |  |  |  | - |  |  | $ | 56,605 |
Sale of business, net |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (1,261 | ) |  |  | - |  |  |  | (1,261 | )
Balance at end of year |  | $ | 1,138,758 |  |  | $ | (503,193 | ) |  | $ | 635,565 |  |  | $ | 1,111,480 |  |  | $ | (503,193 | ) |  | $ | 608,287 |
Schedule of Indefinite-Lived Intangible Assets [Table Text Block] |
|  | Weighted Average |  |  | 2014 |  |  | 2013 |
|  | Amortization Years |  |  | Cost |  |  | Accumulated Impairment |  |  | Net Cost |  |  | Cost |  |  | Accumulated Impairment |  |  | Net Cost |
Indefinite lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  |  |  |  |  | $ | 192,073 |  |  | $ | (9,389 | ) |  | $ | 182,684 |  |  | $ | 182,585 |  |  | $ | (9,389 | ) |  | $ | 173,196 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  |  |  |  |  | Cost |  |  | Accumulated Amortization |  |  | Amortized Cost |  |  | Cost |  |  | Accumulated Amortization |  |  | Amortized Cost |
Finite lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  |  | 0 |  |  | $ | 8,775 |  |  | $ | (8,775 | ) |  | $ | - |  |  | $ | 8,775 |  |  | $ | (8,775 | ) |  | $ | - |
Customer lists |  |  | 8 |  |  |  | 304,180 |  |  |  | (263,178 | ) |  |  | 41,002 |  |  |  | 294,627 |  |  |  | (251,863 | ) |  |  | 42,764 |
Patents |  |  | 15 |  |  |  | 121,341 |  |  |  | (64,447 | ) |  |  | 56,894 |  |  |  | 118,921 |  |  |  | (56,503 | ) |  |  | 62,418 |
Unpatented technology |  |  | 13 |  |  |  | 13,169 |  |  |  | (10,435 | ) |  |  | 2,734 |  |  |  | 13,169 |  |  |  | (9,064 | ) |  |  | 4,105 |
Software |  |  | 8 |  |  |  | 1,046 |  |  |  | (1,037 | ) |  |  | 9 |  |  |  | 1,046 |  |  |  | (912 | ) |  |  | 134 |
Non-compete/other |  |  | 7 |  |  |  | 1,961 |  |  |  | (406 | ) |  |  | 1,555 |  |  |  | 345 |  |  |  | (137 | ) |  |  | 208 |
Total finite lived intangible assets |  |  |  |  |  | $ | 450,472 |  |  | $ | (348,278 | ) |  | $ | 102,194 |  |  | $ | 436,883 |  |  | $ | (327,254 | ) |  | $ | 109,629 |

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