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Note 9 - Goodwill - Components of Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018
Balance | $ 455,130 | $ 348,006 |
Acquired goodwill | 465,682 | 78,571 |
Other items | 44 | 1,175 |
Foreign exchange | (20,405) | 27,378 |
Goodwill disposed during the year | (12,557) |  |
Balance | 887,894 | 455,130 |
Goodwill |  |  | $ 917,477
Accumulated impairment loss |  |  | (29,583)
Goodwill (note 9) | 887,894 | 455,130 | 887,894
Investment Management [Member] |  |  |
Balance | 13,707 | 12,033 |
Acquired goodwill | 366,350 |  |
Other items |  |  |
Foreign exchange | (645) | 1,674 |
Goodwill disposed during the year |  |  |
Balance | 379,412 | 13,707 |
Goodwill |  |  | 379,412
Accumulated impairment loss |  |  |
Goodwill (note 9) | 13,707 | 12,033 | 379,412
Americas [Member] |  |  |
Balance | 190,578 | 126,417 |
Acquired goodwill | 18,014 | 62,938 |
Other items | 44 | 1,175 |
Foreign exchange | (837) | 48 |
Goodwill disposed during the year |  |  |
Balance | 207,799 | 190,578 |
Goodwill |  |  | 234,070
Accumulated impairment loss |  |  | (26,271)
Goodwill (note 9) | 190,578 | 126,417 | 207,799
EMEA [Member] |  |  |
Balance | 201,179 | 165,110 |
Acquired goodwill | 79,364 | 13,672 |
Other items |  |  |
Foreign exchange | (14,234) | 22,397 |
Goodwill disposed during the year | (12,557) |  |
Balance | 253,752 | 201,179 |
Goodwill |  |  | 257,064
Accumulated impairment loss |  |  | (3,312)
Goodwill (note 9) | 201,179 | 165,110 | 253,752
Asia Pacific [Member] |  |  |
Balance | 49,666 | 44,446 |
Acquired goodwill | 1,954 | 1,961 |
Other items |  |  |
Foreign exchange | (4,689) | 3,259 |
Goodwill disposed during the year |  |  |
Balance | 46,931 | 49,666 |
Goodwill |  |  | 46,931
Accumulated impairment loss |  |  |
Goodwill (note 9) | $ 49,666 | $ 44,446 | $ 46,931

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