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INTEREST AND DIVIDEND ON INVESTMENTS- Interest on investments and FHLB dividend income (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Other Income And Expenses [Line Items] |  |  |
Mortgage-backed securities | $ 34,231 | $ 32,167 | $ 37,299
PR Government obligations, U.S. Treasury securities and U.S. Government agencies | 14,781 | 17,276 | 16,476
Total Intesrest income investment securities | 51,125 | 50,905 | 54,850
Interest on money market investments | 4,614 | 3,365 | 2,148
Total interest and dividends on investments | 55,739 | 54,270 | 56,998
Taxable [Member] |  |  |
Other Income And Expenses [Line Items] |  |  |
Mortgage-backed securities | 9,656 | 11,246 | 13,520
PR Government obligations, U.S. Treasury securities and U.S. Government agencies | 2,091 | 4,131 | 2,628
Other investment securities (including FHLB dividends) | 2,113 | 1,462 | 1,075
Interest on money market investments | 4,609 | 2,669 | 1,490
Exempt [Member] |  |  |
Other Income And Expenses [Line Items] |  |  |
Mortgage-backed securities | 24,575 | 20,921 | 23,779
PR Government obligations, U.S. Treasury securities and U.S. Government agencies | 12,690 | 13,145 | 13,848
Interest on money market investments | $ 5 | $ 696 | $ 658

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- Definition Interest earned on from PR govenrment obligations, US treasury securities, and other US government agencies. + References No definition available. + Details
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- Definition Amount of operating dividend and interest income, including amortization and accretion of premiums and discounts, on securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.2,3) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895926&loc=d3e24721-111560 + Details
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- Definition The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business). + References No definition available. + Details
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- Definition Interest earned on funds deposited in US domestic money market accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.4) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Amount of operating interest income, including amortization and accretion of premiums and discounts, on securitized, pass-through debt securities collateralized by real estate mortgage loans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.2) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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