Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - TDRs (Details)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - TDRs (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
contract
Sep. 30, 2016
USD ($)
contract
Sep. 30, 2017
USD ($)
contract
Sep. 30, 2016
USD ($)
contract
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 2,203 1,271 4,809 3,782
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 195,126,000 $ 126,416,000 $ 596,586,000 $ 497,507,000
New Troubled Debt Restructuring, Financial effects of modification $ 1,233,000 $ 795,000 $ 10,618,000 $ 6,209,000
Commercial | Interest rate reduction        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts 6 2 8 4
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 817,000 $ 122,000 $ 854,000 $ 161,000
New Troubled Debt Restructuring, Financial effects of modification 0 $ (6,000) (6,000) $ (5,000)
Commercial | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract   246   629
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance 138,381,000 $ 89,100,000 418,924,000 $ 345,691,000
New Troubled Debt Restructuring, Financial effects of modification $ 837,000 $ 1,450,000 $ 8,695,000 $ 4,368,000
Commercial | Other        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 6 4 16
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 711,000 $ 380,000 $ 1,801,000
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 2,000 $ 27,000 $ 4,000
Commercial | Commercial and Industrial        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 277 254 747 649
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 139,198,000 $ 89,933,000 $ 420,158,000 $ 347,653,000
New Troubled Debt Restructuring, Financial effects of modification $ 837,000 $ 1,446,000 $ 8,716,000 $ 4,367,000
Commercial | Commercial and Industrial | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 271   735  
Commercial | Commercial Real Estate        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 28 30 71 95
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 17,811,000 $ 11,183,000 $ 74,101,000 $ 61,394,000
New Troubled Debt Restructuring, Financial effects of modification $ (133,000) $ 546,000 $ 682,000 $ 1,812,000
Commercial | Commercial Real Estate | Interest rate reduction        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 0 0 1
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 0 $ 0 $ 84,000
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ 0 $ 0
Commercial | Commercial Real Estate | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 28 30 71 90
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 17,811,000 $ 11,183,000 $ 74,101,000 $ 60,995,000
New Troubled Debt Restructuring, Financial effects of modification $ (133,000) $ 546,000 $ 682,000 $ 1,828,000
Commercial | Commercial Real Estate | Other        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 0 0 4
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 0 $ 0 $ 315,000
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ 0 $ (16,000)
Consumer | Automobile        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 797 692 2,065 1,967
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 6,577,000 $ 6,304,000 $ 17,283,000 $ 17,518,000
New Troubled Debt Restructuring, Financial effects of modification $ (196,000) $ (719,000) $ (427,000) $ (1,377,000)
Consumer | Automobile | Interest rate reduction        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 5 4 24 11
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 72,000 $ 26,000 $ 308,000 $ 132,000
New Troubled Debt Restructuring, Financial effects of modification $ (3,000) $ (3,000) $ (9,000) $ (10,000)
Consumer | Automobile | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 487 452 1,298 1,159
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 3,943,000 $ 4,438,000 $ 11,097,000 $ 11,002,000
New Troubled Debt Restructuring, Financial effects of modification $ (124,000) $ (559,000) $ (302,000) $ (981,000)
Consumer | Automobile | Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 305 236 743 797
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 2,562,000 $ 1,840,000 $ 5,878,000 $ 6,384,000
New Troubled Debt Restructuring, Financial effects of modification $ (69,000) $ (157,000) $ (116,000) $ (386,000)
Consumer | Automobile | Other        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 0 0 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 0 $ 0 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ 0 $ 0
Consumer | Home Equity        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 247 194 739 724
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 14,780,000 $ 9,487,000 $ 39,993,000 $ 35,500,000
New Troubled Debt Restructuring, Financial effects of modification $ 473,000 $ (763,000) $ 812,000 $ 162,000
Consumer | Home Equity | Interest rate reduction        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 8 14 25 43
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 376,000 $ 352,000 $ 1,444,000 $ 2,363,000
New Troubled Debt Restructuring, Financial effects of modification $ (11,000) $ (10,000) $ (24,000) $ (103,000)
Consumer | Home Equity | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 160 110 401 466
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 11,676,000 $ 6,740,000 $ 25,544,000 $ 25,031,000
New Troubled Debt Restructuring, Financial effects of modification $ 1,131,000 $ 574,000 $ 2,559,000 $ 2,592,000
Consumer | Home Equity | Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 79 70 243 215
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 2,728,000 $ 2,395,000 $ 8,764,000 $ 8,106,000
New Troubled Debt Restructuring, Financial effects of modification $ (647,000) $ (1,327,000) $ (2,049,000) $ (2,327,000)
Consumer | Home Equity | Other        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 0 70 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 0 $ 4,241,000 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ 326,000 $ 0
Consumer | Residential Mortgage        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 123 99 375 333
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 13,002,000 $ 9,487,000 $ 39,535,000 $ 34,795,000
New Troubled Debt Restructuring, Financial effects of modification $ 272,000 $ 285,000 $ 890,000 $ 1,276,000
Consumer | Residential Mortgage | Interest rate reduction        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 2 2 12
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 134,000 $ 110,000 $ 1,195,000
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 2,000 $ 9,000 $ 17,000
Consumer | Residential Mortgage | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 102 77 282 277
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 11,282,000 $ 7,988,000 $ 30,649,000 $ 29,388,000
New Troubled Debt Restructuring, Financial effects of modification $ 272,000 $ 220,000 $ 761,000 $ 1,217,000
Consumer | Residential Mortgage | Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 20 17 69 40
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 1,656,000 $ 1,105,000 $ 6,328,000 $ 3,788,000
New Troubled Debt Restructuring, Financial effects of modification $ 2,000 $ 63,000 $ 139,000 $ 42,000
Consumer | Residential Mortgage | Other        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 1 3 22 4
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 64,000 $ 260,000 $ 2,448,000 $ 424,000
New Troubled Debt Restructuring, Financial effects of modification $ (2,000) $ 0 $ (19,000) $ 0
Consumer | RV and Marine FInance        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 32 0 105 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 576,000 $ 0 $ 1,956,000 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ (18,000) $ 0 $ (44,000) $ 0
Consumer | RV and Marine FInance | Interest rate reduction        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 0 0 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 0 $ 0 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ 0 $ 0
Consumer | RV and Marine FInance | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 10 0 34 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 84,000 $ 0 $ 710,000 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ (3,000) $ 0 $ (19,000) $ 0
Consumer | RV and Marine FInance | Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 22 0 71 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 492,000 $ 0 $ 1,246,000 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ (15,000) $ 0 $ (25,000) $ 0
Consumer | RV and Marine FInance | Other        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 0 0 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 0 $ 0 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ 0 $ 0
Consumer | Other Consumer        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 699 2 707 14
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 3,182,000 $ 22,000 $ 3,560,000 $ 647,000
New Troubled Debt Restructuring, Financial effects of modification $ (2,000) $ 0 $ (11,000) $ (31,000)
Consumer | Other Consumer | Interest rate reduction        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 18 0 19 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 52,000 $ 0 $ 130,000 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ (2,000) $ 0
Consumer | Other Consumer | Amortization or maturity date change        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 677 1 681 6
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 3,106,000 $ 16,000 $ 3,394,000 $ 575,000
New Troubled Debt Restructuring, Financial effects of modification $ (1,000) $ 0 $ (8,000) $ (24,000)
Consumer | Other Consumer | Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 4 1 7 8
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 24,000 $ 6,000 $ 36,000 $ 72,000
New Troubled Debt Restructuring, Financial effects of modification $ (1,000) $ 0 $ (1,000) $ (7,000)
Consumer | Other Consumer | Other        
Financing Receivable, Modifications [Line Items]        
New Troubled Debt Restructuring, Number of Contracts | contract 0 0 0 0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance $ 0 $ 0 $ 0 $ 0
New Troubled Debt Restructuring, Financial effects of modification $ 0 $ 0 $ 0 $ 0