LOANS AND LEASES - Nonaccrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Document Period End Date			Jun. 30, 2020
Financing Receivable, Nonaccrual, No Allowance	$ 37,684		$ 37,684
Average current balance		$ 85,524		$ 85,952
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		53		117
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		408		915
Nonaccrual loans	67,879		67,879		$ 48,165
Financing Receivable, Nonaccrual, With Allowance	30,195		30,195
Accruing trouble debt restructurings	8,400		8,400		11,400
Total impaired loans					59,600
Restructured loans - nonaccrual status	32,700		32,700		18,500
Interest income effect
Gross amount of interest that would have been recorded under original terms	1,327	1,467	2,633	3,080
Interest included in income
Nonaccrual loans	370	192	537	527
Troubled debt restructurings	68	269	303	505
Total interest included in income	438	461	840	1,032
Net impact on interest income	889	1,006	1,793	2,048
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	12,440		12,440
Average current balance		40,404		39,481
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		43		86
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		212		491
Nonaccrual loans	33,906		33,906		24,346
Financing Receivable, Nonaccrual, With Allowance	21,466		21,466
Total impaired loans					27,480
Interest included in income
Total interest included in income		255		577
Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	1,353		1,353
Average current balance		298		206
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0		0
Nonaccrual loans	1,353		1,353		223
Financing Receivable, Nonaccrual, With Allowance	0		0
Total impaired loans					223
Interest included in income
Total interest included in income		0		0
Construction real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	0		0
Average current balance		7		8
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0		0
Nonaccrual loans	0		0		0
Financing Receivable, Nonaccrual, With Allowance	0		0
Total impaired loans					0
Interest included in income
Total interest included in income		0		0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	5,529		5,529
Average current balance		22,438		23,299
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		4		23
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		98		201
Nonaccrual loans	14,002		14,002		7,295
Financing Receivable, Nonaccrual, With Allowance	8,473		8,473
Total impaired loans					10,831
Interest included in income
Total interest included in income		102		224
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	12,557		12,557
Average current balance		16,457		16,837
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		6		8
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		69		155
Nonaccrual loans	12,813		12,813		10,892
Financing Receivable, Nonaccrual, With Allowance	256		256
Total impaired loans					15,162
Interest included in income
Total interest included in income		75		163
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	5,604		5,604
Average current balance		5,735		5,940
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		28		66
Nonaccrual loans	5,604		5,604		5,242
Financing Receivable, Nonaccrual, With Allowance	0		0
Total impaired loans					5,700
Interest included in income
Total interest included in income		28		66
Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, No Allowance	201		201
Average current balance		185		181
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		1		2
Nonaccrual loans	201		201		167
Financing Receivable, Nonaccrual, With Allowance	0		0
Total impaired loans					204
Interest included in income
Total interest included in income		1		2
Loans with no related allowance recorded [member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		77,296		79,550
Total impaired loans					47,881
Loans with no related allowance recorded [member] | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		34,553		35,267
Total impaired loans					16,726
Loans with no related allowance recorded [member] | Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		298		206
Total impaired loans					223
Loans with no related allowance recorded [member] | Construction real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		7		8
Total impaired loans					0
Loans with no related allowance recorded [member] | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		20,731		21,658
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		15,787		16,290
Total impaired loans					14,868
Loans with no related allowance recorded [member] | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		5,735		5,940
Total impaired loans					5,700
Loans with no related allowance recorded [member] | Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		185		181
Total impaired loans					204
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total impaired loans	33,311		33,311
Impaired Financing Receivables With Related Allowance [Member] | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		5,851		4,214
Total impaired loans	23,586		23,586		10,754
Impaired Financing Receivables With Related Allowance [Member] | Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		0		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		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		1,707		1,641
Total impaired loans					671
Impaired Financing Receivables With Related Allowance [Member] | Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		670		547
Total impaired loans	$ 1,252		$ 1,252		294
Impaired Financing Receivables With Related Allowance [Member] | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		0		0
Total impaired loans					0
Impaired Financing Receivables With Related Allowance [Member] | Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		0		0
Total impaired loans					0
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Average current balance		$ 8,228		$ 6,402
Total impaired loans					$ 11,719