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Note 11 - Goodwill - Components of Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019
Balance | $ 887,894 | $ 455,130 |
Acquired goodwill | 58,221 | 465,682 |
Goodwill disposed during the year |  | (12,557) |
Other items | 4,734 | 44 |
Foreign exchange | (1,628) | (20,405) |
Balance | 949,221 | 887,894 |
Goodwill |  |  | $ 978,804
Accumulated impairment loss |  |  | (29,583)
Goodwill (note 11) | 887,894 | 455,130 | 949,221
Investment Management [Member] |  |  |
Balance | 379,412 | 13,707 |
Acquired goodwill |  | 366,350 |
Goodwill disposed during the year |  |  |
Other items |  |  |
Foreign exchange | (261) | (645) |
Balance | 379,151 | 379,412 |
Goodwill |  |  | 379,151
Accumulated impairment loss |  |  |
Goodwill (note 11) | 379,151 | 379,412 | 379,151
Americas [Member] |  |  |
Balance | 207,799 | 190,578 |
Acquired goodwill | 11,970 | 18,014 |
Goodwill disposed during the year |  |  |
Other items | 330 | 44 |
Foreign exchange | 311 | (837) |
Balance | 220,410 | 207,799 |
Goodwill |  |  | 246,681
Accumulated impairment loss |  |  | (26,271)
Goodwill (note 11) | 220,410 | 207,799 | 220,410
EMEA [Member] |  |  |
Balance | 253,752 | 201,179 |
Acquired goodwill | 846 | 79,364 |
Goodwill disposed during the year |  | (12,557) |
Other items | 4,404 |  |
Foreign exchange | (1,669) | (14,234) |
Balance | 257,333 | 253,752 |
Goodwill |  |  | 260,645
Accumulated impairment loss |  |  | (3,312)
Goodwill (note 11) | 257,333 | 253,752 | 257,333
Asia Pacific [Member] |  |  |
Balance | 46,931 | 49,666 |
Acquired goodwill | 45,405 | 1,954 |
Goodwill disposed during the year |  |  |
Other items |  |  |
Foreign exchange | (9) | (4,689) |
Balance | 92,327 | 46,931 |
Goodwill |  |  | 92,327
Accumulated impairment loss |  |  |
Goodwill (note 11) | $ 92,327 | $ 46,931 | $ 92,327

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