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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Instruments on Statement of Income (Loss) (Detail) - Not Designated as Hedging Instrument, Economic Hedge [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Economic undesignated hedges: |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ 22 | $ (51) | $ 130 | $ (103)
Sale of TBA GNMA MBS pools [Member] | Mortgage Banking [Member] |  |  |  |
Economic undesignated hedges: |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | (131) | (51) | (4) | (103)
Forward loan sales commitments [Member] | Mortgage Banking [Member] |  |  |  |
Economic undesignated hedges: |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 3 | 0 | 8 | 0
Interest Rate Lock Commitments [Member] | Mortgage Banking [Member] |  |  |  |
Economic undesignated hedges: |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 150 | 0 | 130 | 0
Interest Rate Cap [Member] | Interest Income [Member] |  |  |  |
Economic undesignated hedges: |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ 0 | $ 0 | $ (4) | $ 0

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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