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LOANS - Amount of Business Lending Loans by Credit Quality Categories (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Business Lending [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | $ 290,570 |
2020 | 617,704 | $ 881,201
2019 | 383,127 | 391,969
2018 | 360,052 | 373,807
2017 | 254,003 | 263,820
2016 |  | 275,730
Prior | 885,256 | 660,921
Revolving loans amortized cost basis | 601,074 | 592,629
Total | 3,391,786 | 3,440,077
Business Lending [Member] | Pass [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 289,320 |
2020 | 599,626 | 860,178
2019 | 344,078 | 351,350
2018 | 296,523 | 312,087
2017 | 202,536 | 217,138
2016 |  | 231,453
Prior | 715,334 | 543,999
Revolving loans amortized cost basis | 491,420 | 483,018
Total | 2,938,837 | 2,999,223
Business Lending [Member] | Special Mention [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 1,187 |
2020 | 13,585 | 14,687
2019 | 16,348 | 36,041
2018 | 24,560 | 28,410
2017 | 25,583 | 21,875
2016 |  | 29,386
Prior | 76,596 | 51,657
Revolving loans amortized cost basis | 44,936 | 52,732
Total | 202,795 | 234,788
Business Lending [Member] | Classified [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 63 |
2020 | 4,493 | 6,336
2019 | 22,684 | 4,560
2018 | 38,881 | 30,422
2017 | 25,884 | 24,807
2016 |  | 14,891
Prior | 93,255 | 65,157
Revolving loans amortized cost basis | 61,343 | 56,000
Total | 246,603 | 202,173
Business Lending [Member] | Doubtful [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 0 |
2020 | 0 | 0
2019 | 17 | 18
2018 | 88 | 2,888
2017 | 0 | 0
2016 |  | 0
Prior | 71 | 108
Revolving loans amortized cost basis | 3,375 | 879
Total | 3,551 | 3,893
Consumer Mortgage [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 135,151 |
2020 | 386,578 | 375,637
2019 | 313,236 | 330,825
2018 | 230,862 | 248,468
2017 | 220,037 | 240,217
2016 |  | 246,256
Prior | 1,102,968 | 942,393
Revolving loans amortized cost basis | 20,541 | 17,703
Total | 2,409,373 | 2,401,499
Consumer Mortgage [Member] | FICO AB [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 106,415 |
2020 | 254,218 | 260,588
2019 | 213,877 | 227,027
2018 | 153,016 | 166,913
2017 | 149,721 | 164,051
2016 |  | 161,256
Prior | 718,225 | 617,685
Revolving loans amortized cost basis | 95 | 321
Total | 1,595,567 | 1,597,841
Consumer Mortgage [Member] | FICO AB [Member] | Performing [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 106,415 |
2020 | 254,218 | 260,588
2019 | 213,877 | 227,027
2018 | 152,748 | 166,638
2017 | 149,072 | 163,653
2016 |  | 160,911
Prior | 715,345 | 614,976
Revolving loans amortized cost basis | 95 | 321
Total | 1,591,770 | 1,594,114
Consumer Mortgage [Member] | FICO AB [Member] | Nonperforming Financial Instruments [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 0 |
2020 | 0 | 0
2019 | 0 | 0
2018 | 268 | 275
2017 | 649 | 398
2016 |  | 345
Prior | 2,880 | 2,709
Revolving loans amortized cost basis | 0 | 0
Total | 3,797 | 3,727
Consumer Mortgage [Member] | FICO CDE [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 28,736 |
2020 | 132,360 | 115,049
2019 | 99,359 | 103,798
2018 | 77,846 | 81,555
2017 | 70,316 | 76,166
2016 |  | 85,000
Prior | 384,743 | 324,708
Revolving loans amortized cost basis | 20,446 | 17,382
Total | 813,806 | 803,658
Consumer Mortgage [Member] | FICO CDE [Member] | Performing [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 28,736 |
2020 | 132,230 | 115,049
2019 | 98,451 | 102,788
2018 | 77,047 | 80,973
2017 | 69,565 | 75,289
2016 |  | 83,214
Prior | 373,604 | 314,668
Revolving loans amortized cost basis | 20,446 | 17,382
Total | 800,079 | 789,363
Consumer Mortgage [Member] | FICO CDE [Member] | Nonperforming Financial Instruments [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 0 |
2020 | 130 | 0
2019 | 908 | 1,010
2018 | 799 | 582
2017 | 751 | 877
2016 |  | 1,786
Prior | 11,139 | 10,040
Revolving loans amortized cost basis | 0 | 0
Total | 13,727 | 14,295
Consumer Indirect [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 119,208 |
2020 | 282,974 | 303,522
2019 | 273,920 | 305,953
2018 | 175,762 | 202,455
2017 | 72,528 | 86,514
2016 |  | 61,465
Prior | 104,943 | 61,976
Revolving loans amortized cost basis | 0 | 0
Total | 1,029,335 | 1,021,885
Consumer Indirect [Member] | Performing [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 119,208 |
2020 | 282,934 | 303,471
2019 | 273,903 | 305,901
2018 | 175,721 | 202,373
2017 | 72,517 | 86,497
2016 |  | 61,449
Prior | 104,937 | 61,975
Revolving loans amortized cost basis | 0 | 0
Total | 1,029,220 | 1,021,666
Consumer Indirect [Member] | Nonperforming Financial Instruments [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 0 |
2020 | 40 | 51
2019 | 17 | 52
2018 | 41 | 82
2017 | 11 | 17
2016 |  | 16
Prior | 6 | 1
Revolving loans amortized cost basis | 0 | 0
Total | 115 | 219
Consumer Direct [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 13,121 |
2020 | 42,530 | 49,182
2019 | 40,329 | 47,011
2018 | 22,985 | 27,874
2017 | 9,781 | 12,331
2016 |  | 5,232
Prior | 7,499 | 4,149
Revolving loans amortized cost basis | 6,180 | 6,878
Total | 142,425 | 152,657
Consumer Direct [Member] | Performing [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 13,121 |
2020 | 42,530 | 49,181
2019 | 40,319 | 46,992
2018 | 22,983 | 27,872
2017 | 9,781 | 12,326
2016 |  | 5,232
Prior | 7,493 | 4,146
Revolving loans amortized cost basis | 6,180 | 6,878
Total | 142,407 | 152,627
Consumer Direct [Member] | Nonperforming Financial Instruments [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 0 |
2020 | 0 | 1
2019 | 10 | 19
2018 | 2 | 2
2017 | 0 | 5
2016 |  | 0
Prior | 6 | 3
Revolving loans amortized cost basis | 0 | 0
Total | 18 | 30
Home Equity [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 17,564 |
2020 | 49,686 | 48,145
2019 | 45,868 | 48,804
2018 | 25,676 | 28,147
2017 | 21,492 | 23,628
2016 |  | 18,011
Prior | 48,915 | 36,390
Revolving loans amortized cost basis | 186,207 | 196,709
Total | 395,408 | 399,834
Home Equity [Member] | Performing [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 17,564 |
2020 | 49,686 | 48,145
2019 | 45,846 | 48,780
2018 | 25,565 | 28,074
2017 | 21,395 | 23,524
2016 |  | 17,828
Prior | 48,214 | 35,900
Revolving loans amortized cost basis | 184,351 | 194,773
Total | 392,621 | 397,024
Home Equity [Member] | Nonperforming Financial Instruments [Member] |  |
Term Loans Amortized Cost Basis by Origination Year |  |
2021 | 0 |
2020 | 0 | 0
2019 | 22 | 24
2018 | 111 | 73
2017 | 97 | 104
2016 |  | 183
Prior | 701 | 490
Revolving loans amortized cost basis | 1,856 | 1,936
Total | $ 2,787 | $ 2,810

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