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LOANS, Credit Quality By Past Due Status (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  | $ 6,063 | $ 6,063 |
Nonaccrual |  | 20,697 | 20,697 |
Total past due |  | 54,347 | 54,347 |
Current |  | 7,473,692 | 7,473,692 |
Total loans |  | 7,528,039 | 7,528,039 | $ 6,890,543
Interest income on nonaccrual loans |  | 0 | 0 |
Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  | 27,587 | 27,587 |
Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 2,707
Nonaccrual |  |  |  | 15,415
Total past due |  |  |  | 48,684
Current |  |  |  | 5,401,908
Total loans |  |  |  | 5,450,592
Legacy Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 30,562
Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 2,719
Nonaccrual |  |  |  | 3,420
Total past due |  |  |  | 16,429
Impaired | [1] |  |  | 11,797
Current |  |  |  | 1,411,725
Total loans |  |  |  | 1,439,951
Acquired Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 10,290
Business Lending [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 2,775,876
Business Lending [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 1,856,585
Business Lending [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 919,291
Consumer Mortgage [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 1,996,716
Consumer Mortgage [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 434,186
Consumer Indirect [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 1,107,308
Consumer Indirect [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 5,754
Consumer Direct [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 175,976
Consumer Direct [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 8,402
Home Equity [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 314,007
Home Equity [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total loans |  |  |  | 72,318
Commercial Portfolio Segment [Member] | Business Lending [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  | 1,186 | 1,186 |
Nonaccrual |  | 5,001 | 5,001 |
Total past due |  | 8,682 | 8,682 |
Current |  | 3,446,661 | 3,446,661 |
Total loans |  | 3,455,343 | 3,455,343 | 2,775,876
Commercial Portfolio Segment [Member] | Business Lending [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  | 2,495 | 2,495 |
Commercial Portfolio Segment [Member] | Business Lending [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 126
Nonaccrual |  |  |  | 3,840
Total past due |  |  |  | 7,902
Current |  |  |  | 1,848,683
Total loans |  |  |  | 1,856,585
Commercial Portfolio Segment [Member] | Business Lending [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 3,936
Commercial Portfolio Segment [Member] | Business Lending [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 2,173
Nonaccrual |  |  |  | 570
Total past due |  |  |  | 11,261
Impaired | [1] |  |  | 11,797
Current |  |  |  | 896,233
Total loans |  |  |  | 919,291
Commercial Portfolio Segment [Member] | Business Lending [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 8,518
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  | 3,651 | 3,651 |
Nonaccrual |  | 13,544 | 13,544 |
Total past due |  | 30,734 | 30,734 |
Current |  | 2,397,326 | 2,397,326 |
Total loans |  | 2,428,060 | 2,428,060 | 2,430,902
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  | 13,539 | 13,539 |
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 2,052
Nonaccrual |  |  |  | 10,131
Total past due |  |  |  | 23,173
Current |  |  |  | 1,973,543
Total loans |  |  |  | 1,996,716
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 10,990
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 277
Nonaccrual |  |  |  | 2,386
Total past due |  |  |  | 3,553
Impaired | [1] |  |  | 0
Current |  |  |  | 430,633
Total loans |  |  |  | 434,186
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 890
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  | 744 | 744 |
Nonaccrual |  | 2 | 2 |
Total past due |  | 8,862 | 8,862 |
Current |  | 1,048,003 | 1,048,003 |
Total loans |  | 1,056,865 | 1,056,865 | 1,113,062
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  | 8,116 | 8,116 |
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 125
Nonaccrual |  |  |  | 0
Total past due |  |  |  | 12,798
Current |  |  |  | 1,094,510
Total loans |  |  |  | 1,107,308
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 12,673
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 31
Nonaccrual |  |  |  | 0
Total past due |  |  |  | 110
Impaired | [1] |  |  | 0
Current |  |  |  | 5,644
Total loans |  |  |  | 5,754
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 79
Consumer Portfolio Segment [Member] | Consumer Direct [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  | 72 | 72 |
Nonaccrual |  | 54 | 54 |
Total past due |  | 1,001 | 1,001 |
Current |  | 168,227 | 168,227 |
Total loans |  | 169,228 | 169,228 | 184,378
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  | 875 | 875 |
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 76
Nonaccrual |  |  |  | 0
Total past due |  |  |  | 1,531
Current |  |  |  | 174,445
Total loans |  |  |  | 175,976
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 1,455
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 0
Nonaccrual |  |  |  | 52
Total past due |  |  |  | 111
Impaired | [1] |  |  | 0
Current |  |  |  | 8,291
Total loans |  |  |  | 8,402
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 59
Consumer Portfolio Segment [Member] | Home Equity [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  | 410 | 410 |
Nonaccrual |  | 2,096 | 2,096 |
Total past due |  | 5,068 | 5,068 |
Current |  | 413,475 | 413,475 |
Total loans |  | 418,543 | 418,543 | 386,325
Consumer Portfolio Segment [Member] | Home Equity [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  | $ 2,562 | $ 2,562 |
Consumer Portfolio Segment [Member] | Home Equity [Member] | Legacy Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 328
Nonaccrual |  |  |  | 1,444
Total past due |  |  |  | 3,280
Current |  |  |  | 310,727
Total loans |  |  |  | 314,007
Consumer Portfolio Segment [Member] | Home Equity [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | 1,508
Consumer Portfolio Segment [Member] | Home Equity [Member] | Acquired Loans [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
90 + days past due and still accruing |  |  |  | 238
Nonaccrual |  |  |  | 412
Total past due |  |  |  | 1,394
Impaired | [1] |  |  | 0
Current |  |  |  | 70,924
Total loans |  |  |  | 72,318
Consumer Portfolio Segment [Member] | Home Equity [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member] |  |  |  |
Aged analysis of the company's loans [Abstract] |  |  |  |
Total past due |  |  |  | $ 744
[1] | Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30. As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

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