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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Instruments on Statement of Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments Gain Loss [Line Items]
Interest Income Loans	$ (178,956)	$ (156,189)	$ (541,763)	$ (447,110)
Mortgage banking activities	6,098	7,099	19,775	14,573
Not Designated as Hedging Instrument, Economic Hedge [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	123	726	(241)	1,386
Not Designated as Hedging Instrument, Economic Hedge [Member] | Sale of TBA GNMA MBS pools [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	143	454	225	458
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Lock Commitments [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	(24)	254	(488)	910
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Swap [Member] | Interest Income [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	$ 4	$ 18	$ 22	$ 18

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

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Income from mortgage banking activities (fees and commissions) and servicing real estate mortgages, credit cards, and other financial assets held by others net of any related impairment of capitalized service costs. Also includes any premiums received in lieu of regular servicing fees on such loans only as earned over the life of the loans.

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The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.1)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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