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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amounts of All Derivative Instruments (Detail) - Not Designated as Hedging Instrument, Economic Hedge [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Economic undesignated hedges:
Notional amount of derivatives	$ 96,208	$ 126,793
Interest Rate Lock Commitments [Member]
Economic undesignated hedges:
Notional amount of derivatives	14,390	19,931
Forward loan sales commitments [Member]
Economic undesignated hedges:
Notional amount of derivatives	9,409	19,998
Sale of TBA GNMA MBS pools [Member]
Economic undesignated hedges:
Notional amount of derivatives	30,000	42,000
Interest Rate Cap [Member] | Written
Economic undesignated hedges:
Notional amount of derivatives	14,500	14,500
Interest Rate Cap [Member] | Purchase
Economic undesignated hedges:
Notional amount of derivatives	14,500	14,500
Interest Rate Swap [Member]
Economic undesignated hedges:
Notional amount of derivatives	$ 13,409	$ 15,864

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- References

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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