FAIR VALUE - GAINS AND LOSSES (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Fair Value, Option
Aggregate fair value of mortgage loan	$ 19,224	$ 8,971	$ 5,761	$ 11,662
Contractual balance	$ 4,432,351	$ 4,147,249
Mortgage loans held for sale
Fair Value, Option
Number of loans past due 90 days or more or on nonaccrual \| loan	0	0
Aggregate fair value of mortgage loan	$ 19,224	$ 8,971
Contractual balance	18,690	8,676
Unrealized (loss) gain	534	295
Gains (losses) from changes in fair value included in earnings	936	605	345
Mortgage loans held for sale \| Interest Income
Fair Value, Option
Gains (losses) from changes in fair value included in earnings	697	402	346
Mortgage loans held for sale \| Change In Fair Value
Fair Value, Option
Gains (losses) from changes in fair value included in earnings	$ 239	$ 203	$ (1)

Gross amount of contractually required payments on loans and leases receivable.

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

Represents the number of loans past due 90 days or on nonaccrual status.

+ References

No definition available.

+ Details

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- Definition

Represents the unrealized gain (loss) related to the change in the fair value of loans held for sale at of the balance sheet date.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of mortgage loans held-for-sale.

+ References

No definition available.

+ Details

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- Details

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- Details

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