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PORTFOLIO LOANS - Distribution of portfolio loans (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | $ 7,588,077 | $ 7,651,034 |  |
ACL | (91,562) | (91,740) | $ (91,727) | $ (91,608)
Portfolio loans, net | 7,496,515 | 7,559,294 |  |
Total commercial loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | 5,606,241 | 5,635,048 |  |
ACL | (64,425) | (61,884) |  |
C&I and other commercial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | 1,828,711 | 1,835,994 |  |
ACL | (26,207) | (21,256) | (24,276) | (23,860)
Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | 3,331,670 | 3,337,337 |  |
ACL | (33,505) | (35,465) | (34,421) | (38,299)
Real estate construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | 445,860 | 461,717 |  |
ACL | (4,713) | (5,163) | (5,159) | (6,457)
Total retail loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | 1,981,836 | 2,015,986 |  |
ACL | (27,137) | (29,856) |  |
Retail real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | 1,708,663 | 1,720,455 |  |
ACL | (24,281) | (26,298) | (24,255) | (18,193)
Retail other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Commercial loans | 273,173 | 295,531 |  |
ACL | $ (2,856) | $ (3,558) | $ (3,616) | $ (4,799)

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