FAIR VALUE MEASUREMENTS - Carrying value and estimated fair value (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financial assets:
Securities held to maturity, fair value	$ 117,590	$ 105,146
Carrying Amount
Financial assets:
Cash and cash equivalents	398,638	243,207
Securities held to maturity, fair value	117,929	103,726
Loans held for sale	9,751	6,243
Loans, net	4,458,559	3,560,277
Other investments	30,674	23,613
Financial liabilities:
Deposits	5,086,816	3,695,787
Notes payable	99,992	109,966
Subordinated notes	16,603	12,000
Junior subordinated debentures	8,250
Carrying Amount \| Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	398,638	243,207
Securities held to maturity, fair value	113,290	102,751
Carrying Amount \| Other Observable Inputs (Level 2)
Financial assets:
Securities held to maturity, fair value	4,300	2,395
Loans held for sale	9,751	6,243
Financial liabilities:
Notes payable	99,992	109,966
Subordinated notes	16,603	12,000
Junior subordinated debentures	8,250
Carrying Amount \| Significant Unobservable Inputs (Level 3)
Financial assets:
Loans, net	4,336,573	3,447,489
Other investments	30,674	23,613
Financial liabilities:
Deposits	4,632,373	3,466,151
Estimated Fair Value
Financial assets:
Cash and cash equivalents	398,638	243,207
Securities held to maturity, fair value	117,590	105,146
Loans held for sale	9,751	6,243
Loans, net	4,336,573	3,447,489
Other investments	30,674	23,613
Financial liabilities:
Deposits	4,632,373	3,466,151
Notes payable	99,992	109,966
Subordinated notes	16,603	$ 12,000
Junior subordinated debentures	$ 8,250

Fair value of junior subordinated debt obligations.

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Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

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

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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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