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INVESTMENT SECURITIES - Investment Securities Held to Maturity (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Schedule Of Held To Maturity Securities [Line Items] |  |
Held to Maturity Amortized cost | $ 144,799 | $ 150,627
Held to Maturity Gross Unrecognized gains | 0 | 0
Held to Maturity Gross Unrecognized losses | 13,096 | 19,595
Held to Maturity Fair value | $ 131,703 | $ 131,032
Held to Maturity Weighted-average yield | 5.79% | 5.03%
Municipal Bonds [Member] | PUERTO RICO |  |
Schedule Of Held To Maturity Securities [Line Items] |  |
Held to Maturity Amortized Cost After 1 to 5 years | $ 6,096 | $ 3,853
Held to Maturity Gross Unrecognized gains After 1 to 5 years | 0 | 0
Held to Maturity Gross Unrecognized losses After 1 to 5 year | 364 | 173
Held to Maturity Fair value After 1 to 5 years | $ 5,732 | $ 3,680
Held to Maturity Weighted-average yield After 1 to 5 years | 4.73% | 5.38%
Held to Maturity Amortized Cost After 5 to 10 years | $ 53,006 | $ 39,523
Held to Maturity Gross Unrecognized gains After 5 to 10 yearss | 0 | 0
Held to Maturity Gross Unrecognized losses After 5 to 10 year | 3,374 | 3,048
Held to Maturity Fair value After 5 to 10 years | $ 49,632 | $ 36,475
Held to Maturity Weighted-average yield After 5 to 10 years | 5.94% | 5.28%
Held to Maturity Amortized Cost After 10 years | $ 85,697 | $ 107,251
Held to Maturity Gross Unrecognized gains After 10 | 0 | 0
Held to Maturity Gross Unrecognized losses After 10 | 9,358 | 16,374
Held to Maturity Fair value After 10 years | $ 76,339 | $ 90,877
Held to Maturity Weighted-average yield After 10 years | 5.78% | 4.93%
Held to Maturity Amortized cost | $ 144,799 | $ 150,627
Held to Maturity Gross Unrecognized gains | 0 | 0
Held to Maturity Gross Unrecognized losses | 13,096 | 19,595
Held to Maturity Fair value | $ 131,703 | $ 131,032
Held to Maturity Weighted-average yield | 5.79% | 5.03%

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