LOANS AND LEASES - Nonaccrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Document Period End Date	Mar. 31, 2020
Financing Receivable, Nonaccrual, No Allowance	$ 33,567
Average current balance		$ 84,544
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		64
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		507
Nonaccrual loans	48,527		$ 48,165
Financing Receivable, Nonaccrual, With Allowance	14,960
Accruing trouble debt restructurings	22,200		11,400
Total impaired loans			59,600
Restructured loans - nonaccrual status	18,400		18,500
Interest income effect
Gross amount of interest that would have been recorded under original terms	1,306	1,613
Interest included in income
Nonaccrual loans	167	335
Troubled debt restructurings	235	236
Total interest included in income	402	571
Net impact on interest income	904	1,042
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	10,372
Average current balance		35,529
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		43
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		279
Nonaccrual loans	21,126		24,346
Financing Receivable, Nonaccrual, With Allowance	10,754
Total impaired loans			27,480
Interest included in income
Total interest included in income		322
Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	222
Average current balance		162
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Nonaccrual loans	222		223
Financing Receivable, Nonaccrual, With Allowance	0
Total impaired loans			223
Interest included in income
Total interest included in income		0
Construction real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	0
Average current balance		9
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Nonaccrual loans	0		0
Financing Receivable, Nonaccrual, With Allowance	0
Total impaired loans			0
Interest included in income
Total interest included in income		0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	5,844
Average current balance		25,115
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		19
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		103
Nonaccrual loans	10,050		7,295
Financing Receivable, Nonaccrual, With Allowance	4,206
Total impaired loans			10,831
Interest included in income
Total interest included in income		122
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	11,163
Average current balance		17,267
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		2
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		86
Nonaccrual loans	11,163		10,892
Financing Receivable, Nonaccrual, With Allowance	0
Total impaired loans			15,162
Interest included in income
Total interest included in income		88
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	5,821
Average current balance		6,288
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		38
Nonaccrual loans	5,821		5,242
Financing Receivable, Nonaccrual, With Allowance	0
Total impaired loans			5,700
Interest included in income
Total interest included in income		38
Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	145
Average current balance		174
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		1
Nonaccrual loans	145		167
Financing Receivable, Nonaccrual, With Allowance	0
Total impaired loans			204
Interest included in income
Total interest included in income		1
Loans with no related allowance recorded [member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		80,129
Total impaired loans			47,881
Loans with no related allowance recorded [member] | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		33,418
Total impaired loans			16,726
Loans with no related allowance recorded [member] | Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		162
Total impaired loans			223
Loans with no related allowance recorded [member] | Construction real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		9
Total impaired loans			0
Loans with no related allowance recorded [member] | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		23,111
Total impaired loans			10,160
Loans with no related allowance recorded [member] | Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		16,967
Total impaired loans			14,868
Loans with no related allowance recorded [member] | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		6,288
Total impaired loans			5,700
Loans with no related allowance recorded [member] | Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		174
Total impaired loans			204
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total impaired loans	16,298
Impaired Financing Receivables With Related Allowance [Member] | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		2,111
Total impaired loans	10,755		10,754
Impaired Financing Receivables With Related Allowance [Member] | Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		0
Total impaired loans			0
Impaired Financing Receivables With Related Allowance [Member] | Construction real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		0
Total impaired loans			0
Impaired Financing Receivables With Related Allowance [Member] | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		2,004
Total impaired loans			671
Impaired Financing Receivables With Related Allowance [Member] | Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		300
Total impaired loans	$ 1,005		294
Impaired Financing Receivables With Related Allowance [Member] | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		0
Total impaired loans			0
Impaired Financing Receivables With Related Allowance [Member] | Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		0
Total impaired loans			0
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		$ 4,415
Total impaired loans			$ 11,719