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Note Segment reporting (Selected Balance Sheet information) (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |  |
Total assets |  | $ 47,919,428 | $ 44,277,337 | $ 42,601,267
Deposits |  | 39,648,827 | 35,453,508 |
PUERTO RICO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets |  | 37,167,038 | 33,705,624 |
Loans |  | 18,782,224 | 17,591,078 |
Deposits |  | 31,171,092 | 27,575,292 |
UNITED STATES |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets |  | 9,855,363 | 9,648,865 |
Loans |  | 7,085,761 | 6,608,056 |
Deposits |  | 6,956,336 | 6,635,153 |
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets |  | 897,027 | 922,848 |
Loans |  | 695,925 | 743,329 |
Deposits | [1] | $ 1,521,399 | $ 1,243,063 |
[1] | Represents deposits from BPPR operations located in the US and British Virgin Islands.

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