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Note 9 - Goodwill - Components of Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017
Balance | $ 348,006 | $ 305,680 |
Goodwill acquired during the year | 78,571 | 52,954 |
Other items | 1,175 | (869) |
Foreign exchange | 27,378 | (9,759) |
Balance | 455,130 | 348,006 |
Goodwill |  |  | $ 484,713
Accumulated impairment loss |  |  | (29,583)
Goodwill (note 9) | 455,130 | 348,006 | 455,130
Americas [Member] |  |  |
Balance | 126,417 | 106,797 |
Goodwill acquired during the year | 62,938 | 19,665 |
Other items | 1,175 | (603) |
Foreign exchange | 48 | 558 |
Balance | 190,578 | 126,417 |
Goodwill |  |  | 216,849
Accumulated impairment loss |  |  | (26,271)
Goodwill (note 9) | 126,417 | 106,797 | 190,578
EMEA [Member] |  |  |
Balance | 177,143 | 154,356 |
Goodwill acquired during the year | 13,672 | 33,289 |
Other items |  | (266) |
Foreign exchange | 24,071 | (10,236) |
Balance | 214,886 | 177,143 |
Goodwill |  |  | 218,198
Accumulated impairment loss |  |  | (3,312)
Goodwill (note 9) | 177,143 | 154,356 | 214,886
Asia Pacific [Member] |  |  |
Balance | 44,446 | 44,527 |
Goodwill acquired during the year | 1,961 |  |
Other items |  |  |
Foreign exchange | 3,259 | (81) |
Balance | 49,666 | 44,446 |
Goodwill |  |  | 49,666
Accumulated impairment loss |  |  |
Goodwill (note 9) | $ 44,446 | $ 44,527 | $ 49,666

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