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INVESTMENT SECURITIES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
INVESTMENT SECURITIES
Securities transferred from available for sale portfolio to held to maturity portfolio		$ 226,500		$ 0
Net unrealized gains on transfers		1,000
Net of income tax		$ 775
Net unrealized gains on transfers				39
Net of income tax				30
Fair value of debt securities reported less than their historical cost	$ 481,600			$ 481,600		$ 173,900
Debt securities reported less than their historical cost percent of investment portfolio	99.70%			99.70%		34.70%
Held-to-maturity securities	$ 206,485			$ 206,485		$ 0
Total fair value of held-to-maturity	180,411			180,411
Available for sale securities sold	5,100		$ 0	10,200	$ 0
Available-for-sale securities, recognized gain	$ 31			$ 38

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.

+ References

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Amount of unrealized gross gains on transfer of available-for-sale portfolio to the held-to-maturity portfolio.

+ References

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Amount of unrealized gains (net of tax) on transfer of available-for-sale portfolio to the held-to-maturity portfolio.

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The value of debt securities transferred from Available for Sale to Held to Maturity.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with interest rate reset through auction process, sold at par value.

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Amount of unrealized gain (loss) recognized in earnings from transfer of investment in debt security measured at fair value with change in fair value recognized in other comprehensive (available-for-sale) to investment in debt security measured at fair value with change in fair value recognized in net income (trading). Excludes other-than-temporary impairment (OTTI) previously recognized in other comprehensive income (OCI).

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