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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Changes in Level 3 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 542,646	$ 692,864
Transfer from level 2	0	0
Purchases	546	29,603
Sales	(10,689)	(4,261)
Paydowns/maturities	(49,180)	(57,489)
Amortization of premium/discount	(880)	(1,326)
Unrealized gain/(loss)	3,616	(6,638)
Realized gain/(loss) on sale	(312)	(103)
Ending balance	$ 485,747	$ 652,650
Fair value, recurring basis, unobservable input reconciliation, asset, gain (loss) statement of other comprehensive income, extensible list, not disclosed, flag	Unrealized gain/(loss)
Fair value, recurring basis, unobservable input reconciliation, asset, gain (loss) statement of income, extensible list, not disclosed, flag	Realized gain/(loss) on sale

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- Definition

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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-Publisher FASB
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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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