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Note FDIC loss-share asset and true-up payment obligation (FDIC loss share - Additional Information) (Detail) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 22, 2018 | Mar. 31, 2018 | Dec. 31, 2018
Business Acquisition, Contingent Consideration |  |  |
Payment to the FDIC as a consideration for the termination of the loss share agreement. | $ 23,700 |  |
Carrying amount (fair value) |  | $ 171,000 | $ 165,000
FDIC loss-share asset net |  | 44,469 |
Gain from the FDIC termination agreement |  |  | $ 102,800
Non-covered loans | Mortgages |  |  |
Business Acquisition, Contingent Consideration |  |  |
OREO transfer to non-covered status |  | 15,300 |
Loans transfer to non-covered status |  | $ 514,600 |
Banco Popular de Puerto Rico |  |  |
Business Acquisition, Contingent Consideration |  |  |
Loss Sharing Agreement Allocation Percentage | 80.00% |  |

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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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