FAIR VALUE MEASUREMENTS - Carrying Amounts and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets:
Cash and cash equivalents	$ 317,818	$ 1,121,757
Securities AFS, net	227,463	1,191,378
Securities HTM	884,061	0
Loans held for sale		501,436
Loans, net	10,322,520	6,872,952
Investment in FHLB stock	31,203	18,249
Investment in equity securities	16,029	16,025
Liabilities:
Deposits	9,549,856	8,811,960
Borrowings	1,496,456	210,127
Assets Fair Value:
Cash and cash equivalents	317,818	1,121,757
Securities AFS, net	227,463	1,191,378
Securities HTM	784,807
Loans held for sale		515,978
Loans, net	10,139,514	7,072,878
Investment in FHLB stock	31,203	18,249
Investment in equity securities	16,029	16,025
Liabilities Fair Value:
Deposits	9,542,521	8,811,960
Borrowings	1,479,667	210,127
Fair Value Measurement Level 1
Assets:
Investment in equity securities		16,025
Assets Fair Value:
Cash and cash equivalents	317,818	1,121,757
Securities AFS, net	817	490
Investment in equity securities		16,025
Liabilities Fair Value:
Deposits	8,716,345	8,143,473
Borrowings	1,323,136	165,930
Fair Value Measurement Level 2
Assets:
Investment in FHLB stock	31,203	18,249
Assets Fair Value:
Securities AFS, net	218,357	1,179,308
Securities HTM	784,807
Loans held for sale		515,978
Investment in FHLB stock	31,203	18,249
Liabilities Fair Value:
Deposits	826,176	668,487
Fair Value Measurement Level 3
Assets:
Investment in equity securities	16,029
Assets Fair Value:
Securities AFS, net	8,289	11,580
Loans, net	10,139,514	7,072,878
Investment in equity securities	16,029
Liabilities Fair Value:
Borrowings	$ 156,531	$ 44,197

The amount of securities available for sale ("AFS") measured at fair value, net of any adjustments.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of short-term and long-term debt and lease obligation.

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Amount excluding accrued interest, after allowance for credit loss, of financing receivable.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Amount, before valuation allowance, of financing receivable classified as held-for-sale.

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