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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Credit Quality By Past Due Status (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Aged analysis of the company's loans |  |  |
Total Loans | $ 9,170,769 | $ 9,170,769 | $ 8,809,394
Interest income on nonaccrual loans | 0 | 0 |
Legacy Loan |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 9,170,769 | 9,170,769 | 8,809,394
Nonaccrual | 29,923 | 29,923 | 29,245
Legacy Loan | Past Due 30 - 89 Days |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 43,175 | 43,175 | 45,244
Legacy Loan | 90+ Days Past Due and Still Accruing |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,395 | 3,395 | 4,119
Legacy Loan | Financial Asset, Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 76,493 | 76,493 | 78,608
Legacy Loan | Financial Asset, Not Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 9,094,276 | 9,094,276 | 8,730,786
Business lending |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,833,697 | 3,833,697 | 3,645,665
Consumer mortgage |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,072,090 | 3,072,090 | 3,012,475
Consumer indirect |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 1,644,811 | 1,644,811 | 1,539,653
Consumer direct |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 180,985 | 180,985 | 177,605
Home equity |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 439,186 | 439,186 | 433,996
Commercial Portfolio Segment | Business lending |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,833,697 | 3,833,697 | 3,645,665
Commercial Portfolio Segment | Business lending | Legacy Loan |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,833,697 | 3,833,697 | 3,645,665
Nonaccrual | 3,562 | 3,562 | 4,689
Commercial Portfolio Segment | Business lending | Legacy Loan | Past Due 30 - 89 Days |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 12,345 | 12,345 | 9,818
Commercial Portfolio Segment | Business lending | Legacy Loan | 90+ Days Past Due and Still Accruing |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 0 | 0 | 0
Commercial Portfolio Segment | Business lending | Legacy Loan | Financial Asset, Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 15,907 | 15,907 | 14,507
Commercial Portfolio Segment | Business lending | Legacy Loan | Financial Asset, Not Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,817,790 | 3,817,790 | 3,631,158
Residential Portfolio Segment | Consumer mortgage |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,072,090 | 3,072,090 | 3,012,475
Residential Portfolio Segment | Consumer mortgage | Legacy Loan |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,072,090 | 3,072,090 | 3,012,475
Nonaccrual | 24,184 | 24,184 | 22,583
Residential Portfolio Segment | Consumer mortgage | Legacy Loan | Past Due 30 - 89 Days |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 14,841 | 14,841 | 13,757
Residential Portfolio Segment | Consumer mortgage | Legacy Loan | 90+ Days Past Due and Still Accruing |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 2,910 | 2,910 | 3,510
Residential Portfolio Segment | Consumer mortgage | Legacy Loan | Financial Asset, Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 41,935 | 41,935 | 39,850
Residential Portfolio Segment | Consumer mortgage | Legacy Loan | Financial Asset, Not Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 3,030,155 | 3,030,155 | 2,972,625
Residential Portfolio Segment | Home equity |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 439,186 | 439,186 | 433,996
Residential Portfolio Segment | Home equity | Legacy Loan |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 439,186 | 439,186 | 433,996
Nonaccrual | 2,152 | 2,152 | 1,945
Residential Portfolio Segment | Home equity | Legacy Loan | Past Due 30 - 89 Days |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 2,798 | 2,798 | 3,595
Residential Portfolio Segment | Home equity | Legacy Loan | 90+ Days Past Due and Still Accruing |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 210 | 210 | 299
Residential Portfolio Segment | Home equity | Legacy Loan | Financial Asset, Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 5,160 | 5,160 | 5,839
Residential Portfolio Segment | Home equity | Legacy Loan | Financial Asset, Not Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 434,026 | 434,026 | 428,157
Consumer Portfolio Segment | Consumer indirect |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 1,644,811 | 1,644,811 | 1,539,653
Consumer Portfolio Segment | Consumer indirect | Legacy Loan |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 1,644,811 | 1,644,811 | 1,539,653
Nonaccrual | 0 | 0 | 0
Consumer Portfolio Segment | Consumer indirect | Legacy Loan | Past Due 30 - 89 Days |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 11,797 | 11,797 | 16,767
Consumer Portfolio Segment | Consumer indirect | Legacy Loan | 90+ Days Past Due and Still Accruing |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 196 | 196 | 178
Consumer Portfolio Segment | Consumer indirect | Legacy Loan | Financial Asset, Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 11,993 | 11,993 | 16,945
Consumer Portfolio Segment | Consumer indirect | Legacy Loan | Financial Asset, Not Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 1,632,818 | 1,632,818 | 1,522,708
Consumer Portfolio Segment | Consumer direct |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 180,985 | 180,985 | 177,605
Consumer Portfolio Segment | Consumer direct | Legacy Loan |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 180,985 | 180,985 | 177,605
Nonaccrual | 25 | 25 | 28
Consumer Portfolio Segment | Consumer direct | Legacy Loan | Past Due 30 - 89 Days |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 1,394 | 1,394 | 1,307
Consumer Portfolio Segment | Consumer direct | Legacy Loan | 90+ Days Past Due and Still Accruing |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 79 | 79 | 132
Consumer Portfolio Segment | Consumer direct | Legacy Loan | Financial Asset, Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | 1,498 | 1,498 | 1,467
Consumer Portfolio Segment | Consumer direct | Legacy Loan | Financial Asset, Not Past Due |  |  |
Aged analysis of the company's loans |  |  |
Total Loans | $ 179,487 | $ 179,487 | $ 176,138

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