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FAIR VALUE - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Investment securities available for sale | $ 1,803,688 | $ 1,942,568
Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Equity Securities | 434 | 418
Fair Value, Measurements, Recurring [Member] | Other Available For Sale Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 500 | 500
Fair Value, Measurements, Recurring [Member] | U S Treasury Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 7,464 | 7,456
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Noncallable |  |
Assets: |  |
Investment securities available for sale | 310,624 | 319,124
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Callable |  |
Assets: |  |
Investment securities available for sale | 1,465,602 | 1,594,622
Fair Value, Measurements, Recurring [Member] | Puerto Rico Government obligations [Member] |  |
Assets: |  |
Investment securities available for sale | 6,991 | 6,952
Fair Value, Measurements, Recurring [Member] | Private label MBS [Member] |  |
Assets: |  |
Investment securities available for sale | 12,507 | 13,914
Fair Value, Measurements, Recurring [Member] | Interest Rate Cap [Member] | Purchase |  |
Assets: |  |
Asset Derivative | 96 | 623
Fair Value, Measurements, Recurring [Member] | Interest Rate Cap [Member] | Written |  |
Derivatives, included in liabilities: |  |
Liability Derivatives | 94 | 617
Fair Value, Measurements, Recurring [Member] | Interest Rate Lock Commitments [Member] |  |
Assets: |  |
Asset Derivative | 294 | 383
Fair Value, Measurements, Recurring [Member] | Forward Contracts [Member] |  |
Assets: |  |
Asset Derivative | 20 | 12
Derivatives, included in liabilities: |  |
Liability Derivatives | 387 | 383
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] |  |
Assets: |  |
Equity Securities | 434 | 418
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Other Available For Sale Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | U S Treasury Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 7,464 | 7,456
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | US Government Agencies Debt Securities [Member] | Noncallable |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | US Government Agencies Debt Securities [Member] | Callable |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Puerto Rico Government obligations [Member] |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Private label MBS [Member] |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Interest Rate Cap [Member] | Purchase |  |
Assets: |  |
Asset Derivative | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Interest Rate Cap [Member] | Written |  |
Derivatives, included in liabilities: |  |
Liability Derivatives | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Interest Rate Lock Commitments [Member] |  |
Assets: |  |
Asset Derivative | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Forward Contracts [Member] |  |
Assets: |  |
Asset Derivative | 0 | 0
Derivatives, included in liabilities: |  |
Liability Derivatives | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] |  |
Assets: |  |
Equity Securities | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Other Available For Sale Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | U S Treasury Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | US Government Agencies Debt Securities [Member] | Noncallable |  |
Assets: |  |
Investment securities available for sale | 310,624 | 319,124
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | US Government Agencies Debt Securities [Member] | Callable |  |
Assets: |  |
Investment securities available for sale | 1,465,602 | 1,594,622
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Puerto Rico Government obligations [Member] |  |
Assets: |  |
Investment securities available for sale | 4,092 | 4,128
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Private label MBS [Member] |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Interest Rate Cap [Member] | Purchase |  |
Assets: |  |
Asset Derivative | 96 | 623
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Interest Rate Cap [Member] | Written |  |
Derivatives, included in liabilities: |  |
Liability Derivatives | 94 | 617
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Interest Rate Lock Commitments [Member] |  |
Assets: |  |
Asset Derivative | 294 | 383
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Forward Contracts [Member] |  |
Assets: |  |
Asset Derivative | 20 | 12
Derivatives, included in liabilities: |  |
Liability Derivatives | 387 | 383
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] |  |
Assets: |  |
Equity Securities | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Other Available For Sale Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 500 | 500
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | U S Treasury Securities [Member] |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | US Government Agencies Debt Securities [Member] | Noncallable |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | US Government Agencies Debt Securities [Member] | Callable |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Puerto Rico Government obligations [Member] |  |
Assets: |  |
Investment securities available for sale | 2,899 | 2,824
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Private label MBS [Member] |  |
Assets: |  |
Investment securities available for sale | 12,507 | 13,914
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Interest Rate Cap [Member] | Purchase |  |
Assets: |  |
Asset Derivative | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Interest Rate Cap [Member] | Written |  |
Derivatives, included in liabilities: |  |
Liability Derivatives | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Interest Rate Lock Commitments [Member] |  |
Assets: |  |
Asset Derivative | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Forward Contracts [Member] |  |
Assets: |  |
Asset Derivative | 0 | 0
Derivatives, included in liabilities: |  |
Liability Derivatives | $ 0 | $ 0

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