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PORTFOLIO LOANS - Schedule of allowance for loan losses and recorded investments in portfolio loans, by category (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | $ 7,574,874 | $ 7,647,883 |  |
Individually Evaluated for Impairment | 13,203 | 3,151 |  |
Total | 7,588,077 | 7,651,034 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 84,039 | 90,845 |  |
Individually Evaluated for Impairment | 7,523 | 895 |  |
Total | 91,562 | 91,740 | $ 91,727 | $ 91,608
Total commercial loans |  |  |  |
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 5,593,124 | 5,631,983 |  |
Individually Evaluated for Impairment | 13,117 | 3,065 |  |
Total | 5,606,241 | 5,635,048 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 56,927 | 61,014 |  |
Individually Evaluated for Impairment | 7,498 | 870 |  |
Total | 64,425 | 61,884 |  |
C&I and other commercial |  |  |  |
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 1,815,594 | 1,833,624 |  |
Individually Evaluated for Impairment | 13,117 | 2,370 |  |
Total | 1,828,711 | 1,835,994 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 18,709 | 20,471 |  |
Individually Evaluated for Impairment | 7,498 | 785 |  |
Total | 26,207 | 21,256 | 24,276 | 23,860
Commercial real estate |  |  |  |
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 3,331,670 | 3,336,642 |  |
Individually Evaluated for Impairment | 0 | 695 |  |
Total | 3,331,670 | 3,337,337 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 33,505 | 35,380 |  |
Individually Evaluated for Impairment | 0 | 85 |  |
Total | 33,505 | 35,465 | 34,421 | 38,299
Real estate construction |  |  |  |
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 445,860 | 461,717 |  |
Individually Evaluated for Impairment | 0 | 0 |  |
Total | 445,860 | 461,717 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 4,713 | 5,163 |  |
Individually Evaluated for Impairment | 0 | 0 |  |
Total | 4,713 | 5,163 | 5,159 | 6,457
Total retail loans |  |  |  |
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 1,981,750 | 2,015,900 |  |
Individually Evaluated for Impairment | 86 | 86 |  |
Total | 1,981,836 | 2,015,986 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 27,112 | 29,831 |  |
Individually Evaluated for Impairment | 25 | 25 |  |
Total | 27,137 | 29,856 |  |
Retail real estate |  |  |  |
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 1,708,577 | 1,720,369 |  |
Individually Evaluated for Impairment | 86 | 86 |  |
Total | 1,708,663 | 1,720,455 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 24,256 | 26,273 |  |
Individually Evaluated for Impairment | 25 | 25 |  |
Total | 24,281 | 26,298 | 24,255 | 18,193
Retail other |  |  |  |
Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 273,173 | 295,531 |  |
Individually Evaluated for Impairment | 0 | 0 |  |
Total | 273,173 | 295,531 |  |
ACL Attributed to Portfolio Loans |  |  |  |
Collectively Evaluated for Impairment | 2,856 | 3,558 |  |
Individually Evaluated for Impairment | 0 | 0 |  |
Total | $ 2,856 | $ 3,558 | $ 3,616 | $ 4,799

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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