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Note Goodwill and other intangible assets (Gross amount of goodwill and accumulated impairment losses by reportable segment and corporate group) (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Goodwill |  |  |
Goodwill Gross | $ 839,334 | $ 839,334 | $ 795,506
Goodwill Impaired Accumulated Impairment Loss | 168,212 | 168,212 | 168,212
Goodwill (net amounts) | 671,122 | 671,122 | 627,294
Banco Popular de Puerto Rico |  |  |
Goodwill |  |  |
Goodwill Gross | 324,049 | 324,049 | 280,221
Goodwill Impaired Accumulated Impairment Loss | 3,801 | 3,801 | 3,801
Goodwill (net amounts) | 320,248 | 320,248 | 276,420
PB |  |  |
Goodwill |  |  |
Goodwill Gross | 515,285 | 515,285 | 515,285
Goodwill Impaired Accumulated Impairment Loss | 164,411 | 164,411 | 164,411
Goodwill (net amounts) | $ 350,874 | $ 350,874 | $ 350,874

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